CN111473930A - Design method of battery module testing device and battery module testing device - Google Patents
Design method of battery module testing device and battery module testing device Download PDFInfo
- Publication number
- CN111473930A CN111473930A CN201910066783.6A CN201910066783A CN111473930A CN 111473930 A CN111473930 A CN 111473930A CN 201910066783 A CN201910066783 A CN 201910066783A CN 111473930 A CN111473930 A CN 111473930A
- Authority
- CN
- China
- Prior art keywords
- test
- battery module
- simulation model
- test device
- dominant frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The application discloses a design method of a test device of a battery module, comprising the following steps: acquiring Z-direction first-order dominant frequency of the battery module; generating a simulation model of the battery module, wherein a test device corresponding to the simulation model comprises a first end plate, a second end plate and a plurality of test plates arranged between the first end plate and the second end plate; obtaining a Z-direction first-order dominant frequency of a test device corresponding to the current simulation model; calculating the difference value of the Z-direction first-order dominant frequency of the test device corresponding to the battery module and the current simulation model; if the difference value is within the allowable error range, determining the current simulation model as the simulation model matched with the battery module; and if the difference exceeds the allowable error range, adjusting the parameters of the test board in the current simulation model until the simulation model matched with the battery module is obtained. The test device manufactured based on the method disclosed by the application replaces a battery module to carry out vibration test, and the safety of the test process and the accuracy of the test result can be ensured simultaneously.
Description
Technical Field
The application belongs to the technical field of battery testing, and particularly relates to a simulation method of a battery module and a testing device of the battery module.
Background
The battery pack is an important part of a new energy automobile, and in the process of developing the battery pack, the battery pack needs to be subjected to vibration testing so as to test the structural function and the durability of the battery pack.
There are two ways to test the vibration of a battery pack: in the first mode, an actual battery pack is adopted for vibration test; the second mode adopts the balancing weight to replace the battery module, installs the balancing weight in the battery box and carries out vibration test, wherein, the balancing weight is steel or aluminium material usually, and the weight of balancing weight is unanimous with the weight of the battery module of reality.
However, both of the above approaches have drawbacks: when the first mode is adopted, the battery box is likely to be damaged in the vibration test process, because the battery module stores huge chemical energy, short circuit and fire can be caused, even explosion can occur, the safety is low, and even if the battery box is not damaged, a battery pack for testing cannot be used any more and must be scrapped; by performing the vibration test in the second way, the applicant found that the results of the vibration test were subject to large deviations.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for designing a testing apparatus for a battery module and a testing apparatus for a battery module, so as to provide a testing apparatus for replacing a battery module, and to perform a vibration test on a battery pack using the testing apparatus, which can ensure the safety of a testing process and the accuracy of a test result at the same time.
In order to achieve the above purpose, the present application provides the following technical solutions:
in one aspect, the present application provides a method for designing a testing apparatus for a battery module, including:
acquiring Z-direction first-order dominant frequency of the battery module;
generating a simulation model of the battery module, wherein a test device corresponding to the simulation model comprises a first end plate, a second end plate and a plurality of test plates arranged between the first end plate and the second end plate, the weight of the test device corresponding to the simulation model is the same as that of the battery module, the length of the test device corresponding to the simulation model is the same as that of the battery module, and the width of the test device corresponding to the simulation model is the same as that of the battery module;
obtaining a Z-direction first-order dominant frequency of a test device corresponding to the current simulation model;
calculating the difference value of the Z-direction first-order dominant frequency of the test device corresponding to the battery module and the current simulation model;
if the difference value is within the allowable error range, determining that the current simulation model is the simulation model matched with the battery module, wherein the simulation model matched with the battery module is used for manufacturing a test device of the battery module, and the test device of the battery module is used for vibration test of a battery pack;
and if the difference exceeds the allowable error range, adjusting parameters of a test board in the current simulation model, wherein the weight of the test device corresponding to the adjusted simulation model is the same as the weight of the battery module, the length of the test device corresponding to the adjusted simulation model is the same as the length of the battery module, the width of the test device corresponding to the adjusted simulation model is the same as the width of the battery module, and executing the step of obtaining the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model and the subsequent steps again until obtaining the simulation model matched with the battery module.
Optionally, in the above method, the adjusting parameters of the test board in the current simulation model includes:
adjusting material parameters of the test board;
and/or adjusting the arrangement positions of the test boards made of different materials in the plurality of test boards.
Optionally, in the above method, the adjusting material parameters of the test board includes:
under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, adjusting one or more test boards from the current material to a material with a higher elastic modulus;
and under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, adjusting the one or more test boards from the current material to a material with a smaller elastic modulus.
Optionally, in the above method, the adjusting the arrangement positions of the test boards of different materials in the plurality of test boards includes:
under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, moving one or more first-type test boards in the plurality of test boards to two sides, and moving one or more second-type test boards in the plurality of test boards to the middle;
under the condition that the Z-direction first-order dominant frequency of a test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, moving one or more first-type test boards in the plurality of test boards to the middle, and moving one or more second-type test boards in the plurality of test boards to two sides;
wherein the elastic modulus of the first type of test panel is greater than the elastic modulus of the second type of test panel.
On the other hand, this application provides a test device of battery module, test device is used for the vibration test of battery package, test device includes:
a first end plate;
a second end plate;
a plurality of test plates fixedly disposed between the first end plate and the second end plate;
the weight of the test device is the same as that of the battery module, the length of the test device is the same as that of the battery module, the width of the test device is the same as that of the battery module, and the difference value between the first-order Z-direction dominant frequency of the test device and the first-order Z-direction dominant frequency of the battery module is within an allowable error range.
Optionally, in the testing device, the plurality of testing boards are at least two testing boards made of two materials.
Optionally, in the above testing apparatus, the first end plate, the second end plate, and the plurality of test plates are connected to each other by fasteners.
Optionally, in the testing apparatus, the first end plate, the second end plate, and the plurality of testing plates are bonded together.
Optionally, in the testing apparatus, the first end plate, the second end plate, and the plurality of testing plates are bonded together by structural adhesive.
Therefore, the beneficial effects of the application are as follows:
based on the design method of the test device of the battery module, which is disclosed by the application, the simulation model adaptive to the battery module can be obtained, the weight of the test device manufactured according to the simulation model is the same as the weight of the battery module, the length and the width of the test device are the same as the length and the width of the battery module, and the difference value between the Z-direction first-order dominant frequency of the test device and the Z-direction first-order dominant frequency of the battery module is in an allowable error range, so that the rigidity of the test device and the rigidity of the battery module are equivalent or approximately equivalent (namely the difference between the rigidity of the test device and the rigidity of the battery module is in the allowable error range), the test device is installed in the battery box body for vibration test, the test safety is ensured, and the test result has higher accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for designing a testing apparatus for a battery module according to the present disclosure;
fig. 2 is a structural view of a battery module disclosed in the present application;
fig. 3 is a structural view of a testing apparatus for a battery module disclosed in the present application.
Detailed Description
The applicant finds that the root cause of the test deviation can occur when the balancing weight is adopted to replace the battery module for vibration test is as follows: the balancing weight is a solid block made of metal, the density and the elastic modulus of the metal are large, the size of the balancing weight is smaller than that of the battery module, the rigidity is far larger than that of the battery module, and after the balancing weight is assembled in the battery box, the balancing weight plays a role of a reinforcing rib and plays a role in reinforcing the rigidity of the battery box, so that the structural strength of the battery box cannot be truly reflected by a vibration test result, a large deviation occurs in the test result, and the vibration test result is particularly superior to the actual situation.
The application discloses a design method of a test device of a battery module and the test device of the battery module, which are used for replacing the test device of the battery module.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a design method of a testing apparatus for a battery module disclosed in the present application, which specifically includes:
step S1: and acquiring the Z-direction first-order dominant frequency of the battery module.
The battery module in this application means: a battery module in a battery pack that requires a vibration test.
In the implementation, the Z-direction first-order dominant frequency of the battery module may be obtained by a test method or a CAE (computer aided engineering) method. The Z-direction first-order main frequency is also called Z-direction first-order modal frequency and can also be called Z-direction first-order main vibration frequency.
The Z direction refers to: after the battery module is mounted to the battery pack, the direction perpendicular to the mounting plane, that is, the height direction of the battery module.
The method for obtaining the Z-direction first-order dominant frequency of the battery module through the test method specifically comprises the following steps: the battery module is fixed on a vibration test bench, a sweep frequency signal with preset frequency and preset magnitude is applied to the vibration test bench, for example, the sweep frequency signal with the frequency range from 1Hz to 1000Hz and the magnitude of 1g of acceleration is applied, a response curve of the acceleration changing along with the frequency is obtained through an acceleration sensor arranged on the battery module, and the Z-direction first-order dominant frequency of the battery module is obtained from the first peak value of the response curve.
The method for obtaining the Z-direction first-order dominant frequency of the battery module through the CAE method specifically comprises the following steps: establishing an FEM finite element model of the battery module, constraining the position of a mounting hole of the battery module, and then carrying out modal analysis or frequency sweep analysis to obtain Z-direction first-order dominant frequency of the battery module.
Step S2: and generating a simulation model of the battery module.
The testing device corresponding to the simulation model comprises a first end plate, a second end plate and a plurality of testing plates arranged between the first end plate and the second end plate, the weight of the testing device corresponding to the simulation model is the same as that of the battery module, the length of the testing device corresponding to the simulation model is the same as that of the battery module, and the width of the testing device corresponding to the simulation model is the same as that of the battery module.
The structure of the battery module may be as shown in fig. 2, and the structure of the test apparatus for a battery module may be as shown in fig. 3. In fig. 2, the X direction is the longitudinal direction of the battery module, the Y direction is the width direction of the battery module, and the Z direction is the height direction of the battery module, and in fig. 3, the X direction is the longitudinal direction of the testing apparatus, the Y direction is the width direction of the testing apparatus, and the Z direction is the height direction of the testing apparatus.
Step S3: and obtaining the Z-direction first-order main frequency of the test device corresponding to the current simulation model.
In the implementation, the Z-direction first-order main frequency of the test device corresponding to the current simulation model is obtained through a CAE method.
Step S4: and calculating the difference value of the Z-direction first-order dominant frequency of the test device corresponding to the battery module and the current simulation model.
Step S5: and if the difference value is within the allowable error range, determining that the current simulation model is the simulation model matched with the battery module. The simulation model matched with the battery module is used for manufacturing the test device of the battery module, and the test device of the battery module is used for testing battery vibration.
Step S6: if the difference exceeds the allowable error range, adjusting the parameters of the test board in the current simulation model, and performing step S3 and the subsequent steps again until the simulation model adapted to the battery module is obtained. The weight of the test device corresponding to the adjusted simulation model is the same as the weight of the battery module, the length of the test device corresponding to the adjusted simulation model is the same as the length of the battery module, and the width of the test device corresponding to the adjusted simulation model is the same as the width of the battery module.
The applicant finds that when the Z-direction first-order dominant frequency of the battery module is the same as the Z-direction first-order dominant frequency of a test device for replacing the battery module, the rigidity of the battery module is equivalent to the rigidity of the test device, the dynamic characteristics of the battery module and the rigidity of the test device are very close to each other, the test device is installed in a battery box body for vibration test, and the obtained test result can reflect the real situation. Therefore, in the present application, the simulation model is adjusted with the objective that the first-order dominant frequency in the Z direction of the test apparatus is the same as the first-order dominant frequency in the Z direction of the battery module.
If the Z-direction first-order dominant frequencies of the test device corresponding to the battery module and the current simulation model are the same or the difference value of the Z-direction first-order dominant frequencies and the difference value of the Z-direction first-order dominant frequencies is within the allowable error range, the current simulation model is determined to be the simulation model matched with the.
If the difference value of the Z-direction first-order dominant frequency of the test device corresponding to the battery module and the current simulation model is larger and exceeds the allowable error range, the parameters of the test board in the current simulation model are adjusted, it needs to be noted that the weight, the length and the width of the test device corresponding to the adjusted simulation model are ensured to be unchanged, namely, the weight of the test device corresponding to the adjusted simulation model is ensured to be the same as the weight of the battery module, the length of the test device corresponding to the adjusted simulation model is ensured to be the same as the length of the battery module, and the width of the test device corresponding to the adjusted simulation model is the same as the width of the battery module. Thereafter, step S3 and the following steps are executed again until the simulation model adapted to the battery module is obtained.
The design method of the test device of the battery module, which is disclosed by the application, comprises the steps of firstly obtaining Z-direction first-order dominant frequency of the battery module in a battery pack which needs to be subjected to vibration test, then generating a simulation model of the battery module, wherein the test device corresponding to the simulation model comprises a first end plate, a second end plate and a plurality of test plates arranged between the first end plate and the second end plate, the weight, the length and the width of the test device corresponding to the simulation model are the same as those of the battery module, the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is obtained, the difference value of the Z-direction first-order dominant frequency of the test device corresponding to the battery module and the current simulation model is calculated, if the difference value is within an allowable error range, the current simulation model is used as a simulation model matched with the battery module, and if the difference value is beyond the allowable error range, and adjusting the parameters of the test board in the current simulation model on the premise that the weight, the length and the width of the test device are kept unchanged until the simulation model matched with the battery module is obtained.
It can be seen that, based on the method disclosed in the present application, a simulation model adapted to the battery module can be obtained, the weight of the test apparatus manufactured according to the simulation model is the same as the weight of the battery module, the length and the width of the test apparatus are the same as the length and the width of the battery module, and the difference between the first-order dominant frequency in the Z direction of the test apparatus and the first-order dominant frequency in the Z direction of the battery module is within the allowable error range, which ensures that the rigidity of the test apparatus and the rigidity of the battery module are equivalent or approximately equivalent (i.e. the difference between the rigidity of the test apparatus and the rigidity of the battery module is within the allowable error range), the test apparatus is installed in the battery box for vibration testing, thereby ensuring the safety of the testing and ensuring that the test result has higher accuracy.
When the material of the test board in the test device is adjusted, the Z-direction first-order dominant frequency of the test device will change. In addition, when the plurality of test boards in the test apparatus are at least two kinds of test boards, the Z-direction first-order dominant frequency of the test apparatus changes when the arrangement positions of the test boards of different materials are adjusted.
In practice, the step S6 of adjusting the parameters of the test board in the current simulation model includes: adjusting material parameters of the test board; and/or adjusting the arrangement positions of the test boards made of different materials in the plurality of test boards.
As an example, in the method disclosed in the above application, the adjusting the parameters of the test board in the current simulation model in step S6 includes: adjusting the material parameters of the test board.
As an embodiment, adjusting the material parameters of the test board includes:
under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, adjusting one or more test boards from the current material to a material with a higher elastic modulus;
and under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, adjusting the one or more test boards from the current material to a material with smaller elastic modulus.
The description is made with reference to an example:
the test device corresponding to the current simulation model comprises a plastic test board and a metal test board.
If the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, and the difference value between the Z-direction first-order dominant frequency and the Z-direction first-order dominant frequency exceeds the allowable error range, on the premise that the weight, the length and the width of the test device are not changed, the test board made of one or more plastic materials is replaced by the test board made of a metal material, or the test board made of one or more metal materials is replaced by the test board made of a metal material with a larger elastic modulus, for example, the test board made of one or more aluminum materials is replaced by the test board made of a steel material, so that the Z-direction first-order dominant.
If the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, and the difference value between the Z-direction first-order dominant frequency and the Z-direction first-order dominant frequency exceeds the allowable error range, on the premise that the weight, the length and the width of the test device are not changed, the test board made of one or more metal materials is replaced by the test board made of a plastic material, or the test board made of one or more metal materials is replaced by the test board made of a metal material with a smaller elastic modulus, for example, the test board made of one or more steel materials is replaced by the test board made of an aluminum material, so that the Z-direction first-order dominant.
As another example, in the method disclosed in the above application, the adjusting the parameters of the test board in the current simulation model in step S6 includes: the arrangement positions of the test boards made of different materials in the plurality of test boards are adjusted.
As an embodiment, adjusting the arrangement positions of the test boards of different materials in the plurality of test boards includes:
under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, moving one or more first-type test boards in the plurality of test boards to two sides, and moving one or more second-type test boards in the plurality of test boards to the middle;
under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, moving one or more first-type test boards in the plurality of test boards to the middle, and moving one or more second-type test boards in the plurality of test boards to two sides;
wherein the elastic modulus of the first type of test panel is greater than the elastic modulus of the second type of test panel.
The description is made with reference to an example:
the test device corresponding to the current simulation model comprises a plastic test board and a metal test board. Since the elastic modulus of metal is greater than that of plastic, the test board made of metal is considered as a first type of test board, and the test board made of plastic is considered as a second type of test board.
If the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, and the difference value between the Z-direction first-order dominant frequency and the Z-direction first-order dominant frequency exceeds the allowable error range, one or more test boards made of metal materials are moved towards two sides and correspondingly one or more test boards made of plastic materials are moved towards the middle on the premise that the weight, the length and the width of the test device are not changed, so that the Z-direction first-order dominant frequency of the test device is increased, and the rigidity of the test device is correspondingly increased.
If the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, and the difference value between the Z-direction first-order dominant frequency and the Z-direction first-order dominant frequency exceeds the allowable error range, one or more test boards made of plastic materials are moved towards two sides and correspondingly moved towards the middle on the premise that the weight, the length and the width of the test device are not changed, so that the Z-direction first-order dominant frequency of the test device is reduced, and the rigidity of the test device is correspondingly reduced.
As another example, in the method disclosed in the above application, the adjusting the parameters of the test board in the current simulation model in step S6 includes: the material parameter of survey test panel is adjusted, and the position of arranging of surveying the test panel of different materials in a plurality of test panels is adjusted.
Optionally, the arrangement positions of the test boards made of different materials in the plurality of test boards are preferentially adjusted, and if the arrangement positions of the test boards made of different materials in the plurality of test boards are adjusted, the difference value of the Z-direction first-order dominant frequency of the test device corresponding to the simulation model and the Z-direction first-order dominant frequency of the battery module cannot be within an allowable range, and then the material parameters of the test boards are adjusted.
The application discloses a design method of a test device of a battery module, can obtain a simulation model adapted to the battery module based on the design method, and the structure of the test device manufactured according to the simulation model is shown in fig. 3, and includes:
a first end plate 100;
a second end plate 200;
a plurality of test boards are fixedly disposed between the first end plate 100 and the second end plate 200.
And the weight of the test device is the same as the weight of the battery module in the battery pack needing vibration testing, the length of the test device is the same as the length of the battery module, the width of the test device is the same as the width of the battery module, and the difference value between the Z-direction first-order dominant frequency of the test device and the Z-direction first-order dominant frequency of the battery module is within an allowable error range.
In the testing device shown in FIG. 3, the test boards are designated 301 and 302, respectively, wherein the test board designated 301 is a test board of one material and the test board designated 302 is a test board of another material.
The utility model discloses a test device of battery module, weight is the same with the weight of battery module, length is the same with the length of battery module, the width is the same with the width of battery module, and the difference of the Z of this test device to first-order dominant frequency and the Z of battery module to first-order dominant frequency is in the allowable error range, this rigidity of having guaranteed test device is equivalent or approximate equivalent with the rigidity of battery module (namely the difference of the rigidity of test device and the rigidity of battery module is in the allowable error range), the kinetic behavior of test device and battery module is unanimous, install this test device in the battery box and carry out vibration test, the security of having both guaranteed the test, it has higher accuracy also to have guaranteed that the test result.
Optionally, in the testing device disclosed in the present application, the plurality of testing boards are testing boards made of at least two materials. In the test apparatus shown in FIG. 3, a test board of two materials is provided.
Optionally, a test board made of plastic and a test board made of metal are provided in the testing apparatus.
For example, a test device is provided with a test plate made of plastic and a test plate made of aluminum. For example, a test apparatus is provided with a test plate made of aluminum and a test plate made of steel. For example, a test apparatus is provided with a plastic test plate, an aluminum test plate, and a steel test plate.
In the testing device disclosed in the present application, the first end plate 100, the second end plate 200 and the plurality of test plates are integrally connected by fasteners.
For example, through holes are formed in the first end plate 100, the second end plate 200, and the plurality of test plates, respectively, a screw is sequentially inserted through the through holes formed in the first end plate 100, the plurality of test plates, and the second end plate 200, and then both ends of the screw are respectively screwed with nuts, thereby integrally connecting the first end plate 100, the second end plate 200, and the plurality of test plates by fasteners.
As another embodiment, in the test device disclosed in the present application, the first end plate 100, the second end plate 200, and the plurality of test plates are bonded together.
The first end plate 100, the second end plate 200 and the plurality of test plates are bonded together by, for example, structural adhesive.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A design method of a test device of a battery module is characterized by comprising the following steps:
acquiring Z-direction first-order dominant frequency of the battery module;
generating a simulation model of the battery module, wherein a test device corresponding to the simulation model comprises a first end plate, a second end plate and a plurality of test plates arranged between the first end plate and the second end plate, the weight of the test device corresponding to the simulation model is the same as that of the battery module, the length of the test device corresponding to the simulation model is the same as that of the battery module, and the width of the test device corresponding to the simulation model is the same as that of the battery module;
obtaining a Z-direction first-order dominant frequency of a test device corresponding to the current simulation model;
calculating the difference value of the Z-direction first-order dominant frequency of the test device corresponding to the battery module and the current simulation model;
if the difference value is within the allowable error range, determining that the current simulation model is the simulation model matched with the battery module, wherein the simulation model matched with the battery module is used for manufacturing a test device of the battery module, and the test device of the battery module is used for vibration test of a battery pack;
and if the difference exceeds the allowable error range, adjusting parameters of a test board in the current simulation model, wherein the weight of the test device corresponding to the adjusted simulation model is the same as the weight of the battery module, the length of the test device corresponding to the adjusted simulation model is the same as the length of the battery module, the width of the test device corresponding to the adjusted simulation model is the same as the width of the battery module, and executing the step of obtaining the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model and the subsequent steps again until obtaining the simulation model matched with the battery module.
2. The method of claim 1, wherein said adjusting parameters of the test board in the current simulation model comprises:
adjusting material parameters of the test board;
and/or adjusting the arrangement positions of the test boards made of different materials in the plurality of test boards.
3. The method of claim 2, wherein said adjusting material parameters of the test plate comprises:
under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, adjusting one or more test boards from the current material to a material with a higher elastic modulus;
and under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, adjusting the one or more test boards from the current material to a material with a smaller elastic modulus.
4. The method of claim 3, wherein said adjusting the placement of the test boards of different materials in the plurality of test boards comprises:
under the condition that the Z-direction first-order dominant frequency of the test device corresponding to the current simulation model is smaller than the Z-direction first-order dominant frequency of the battery module, moving one or more first-type test boards in the plurality of test boards to two sides, and moving one or more second-type test boards in the plurality of test boards to the middle;
under the condition that the Z-direction first-order dominant frequency of a test device corresponding to the current simulation model is larger than the Z-direction first-order dominant frequency of the battery module, moving one or more first-type test boards in the plurality of test boards to the middle, and moving one or more second-type test boards in the plurality of test boards to two sides;
wherein the elastic modulus of the first type of test panel is greater than the elastic modulus of the second type of test panel.
5. The utility model provides a test device of battery module which characterized in that, test device is used for the vibration test of battery package, test device includes:
a first end plate;
a second end plate;
a plurality of test plates fixedly disposed between the first end plate and the second end plate;
the weight of the test device is the same as that of the battery module, the length of the test device is the same as that of the battery module, the width of the test device is the same as that of the battery module, and the difference value between the first-order Z-direction dominant frequency of the test device and the first-order Z-direction dominant frequency of the battery module is within an allowable error range.
6. The device of claim 5, wherein said plurality of test panels are at least two material test panels.
7. The test device of claim 5, wherein the first end plate, the second end plate, and the plurality of test plates are integrally connected by fasteners.
8. The test device of claim 5, wherein the first end plate, the second end plate, and the plurality of test plates are bonded together.
9. The testing device of claim 8, wherein said first end plate, said second end plate and said plurality of test plates are integrally bonded together by structural adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066783.6A CN111473930A (en) | 2019-01-24 | 2019-01-24 | Design method of battery module testing device and battery module testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066783.6A CN111473930A (en) | 2019-01-24 | 2019-01-24 | Design method of battery module testing device and battery module testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111473930A true CN111473930A (en) | 2020-07-31 |
Family
ID=71743696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910066783.6A Pending CN111473930A (en) | 2019-01-24 | 2019-01-24 | Design method of battery module testing device and battery module testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111473930A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112417677A (en) * | 2020-11-19 | 2021-02-26 | 上海电气集团股份有限公司 | Distribution area adjusting method, device, equipment and storage medium |
-
2019
- 2019-01-24 CN CN201910066783.6A patent/CN111473930A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112417677A (en) * | 2020-11-19 | 2021-02-26 | 上海电气集团股份有限公司 | Distribution area adjusting method, device, equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105022860B (en) | PCB solder joint random vibration Prediction method for fatigue life and system | |
| CN112257320B (en) | Method for analyzing vibration fatigue characteristics of onboard chassis | |
| CN104268335A (en) | Vibration fatigue life predication method and system for micro-packaging assembly | |
| CN111125946B (en) | Method for optimizing structure of boarding body based on MDO technology | |
| CN112765724A (en) | Automobile damping patch position optimization method and system | |
| EP0916121A1 (en) | Method for incorporating boundary conditions into finite element analysis | |
| CN111473930A (en) | Design method of battery module testing device and battery module testing device | |
| CN117763903A (en) | Random vibration fatigue analysis method, device, electronic equipment and storage medium | |
| CN110874514A (en) | Method and system for evaluating strength of rear frame of wind generating set | |
| Wang et al. | Modified Tikhonov regularization in model updating for damage identification | |
| Schriefer et al. | A hybrid frequency-time-domain approach to determine the vibration fatigue life of electronic devices | |
| CN113449452A (en) | Simulation test method, device and equipment for instrument board assembly | |
| CN112182926A (en) | Method for improving vibration reliability of airborne case | |
| Chen et al. | Applicability study of Steinberg vibration fatigue model in electronic products | |
| CN114896708B (en) | Vehicle frame quality attribute quantification method and system | |
| CN209214868U (en) | The experimental rig of battery modules | |
| CN116132882B (en) | Method for determining installation position of loudspeaker | |
| Martins et al. | Enhancing the Accuracy of Linear Finite Element Models of Vehicle Structures Considering Spot-Welded Flanges. Materials 2021, 14, 6075 | |
| Fathzadeh et al. | Vibration simulation and fatigue life estimation of a printed circuit board using a validated model | |
| CN113408065B (en) | Equivalent modeling method for random vibration simulation by using directional vibration damping device | |
| Schriefer et al. | Assessing the vibrational response and robustness of electronic systems by dissolving time and length scale | |
| Shimizu et al. | 3264 Identification method of dynamic characteristics of joints in jointed structure | |
| Aytekin | Vibration analysis of pcbs and electronic components | |
| US20220100924A1 (en) | Method of material characterization of additive manufacturing (am) parts using nvh testing with acoustic and/or mechanical excitation | |
| CN113935280B (en) | Method for calculating fatigue degree of device based on transfer characteristic of circuit board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |