CN110595611A - Battery pack sloshing test method and system - Google Patents
Battery pack sloshing test method and system Download PDFInfo
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- CN110595611A CN110595611A CN201910828511.5A CN201910828511A CN110595611A CN 110595611 A CN110595611 A CN 110595611A CN 201910828511 A CN201910828511 A CN 201910828511A CN 110595611 A CN110595611 A CN 110595611A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The method comprises the steps of fixing a battery pack to be tested on a detection vehicle in a tooling mode, arranging a vibration sensor and a microphone on the battery pack to be tested, stably running the detection vehicle to a starting point of a brake section corresponding to the brake section information according to the brake section information in the detection vehicle, starting braking, stopping at an end point of the brake section, and controlling a data acquisition analyzer to analyze an output signal of the vibration sensor and an output signal of the microphone in the braking process of the detection vehicle in the brake section so as to obtain the sloshing sound information of the battery pack to be tested on the brake section information. Therefore, all sloshing sounds generated by the battery pack in the actual working condition during the driving and the passing of the vehicle can be truly simulated, and the noise level of the battery pack in the braking process can be accurately measured.
Description
Technical Field
The application relates to the technical field of battery pack testing, in particular to a battery pack sloshing sound testing method and system.
Background
In view of the requirement of controlling the noise of the battery pack assembly in the current automobile development process, a host factory needs to test the noise of the battery pack assembly, the emphasis is on the noise generated in the driving process, and due to the leakage of the electrolyte in the battery pack or other structural faults, noise such as sloshing sound and the like may occur. Therefore, how to accurately test the sloshing sound of the battery pack in the driving process becomes a technical problem to be solved urgently.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, a first objective of the present application is to propose a battery pack sloshing test method.
A second objective of the present application is to provide a battery pack sloshing sound test system.
A third object of the present application is to provide an inspection vehicle.
A fourth object of the present application is to propose a computer readable storage medium.
To achieve the above object, an embodiment of a first aspect of the present application provides a battery pack sloshing test method, including: fixing a battery pack to be tested on a detection vehicle through a tool, wherein the fixing mode of the battery pack to be tested on the detection vehicle is the same as that of the battery pack to be tested during assembly on a whole vehicle; arranging a vibration sensor on the surface of the battery pack to be tested, and arranging a microphone around the battery pack to be tested, wherein the vibration sensor and the microphone are both connected with a data acquisition analyzer, and the data acquisition analyzer is arranged on the detection vehicle; according to the brake section information in the detection vehicle, the detection vehicle is stably operated to the starting point of the brake section corresponding to the brake section information, braking is started, and the detection vehicle stops at the end point of the brake section, and in the process that the detection vehicle brakes at the brake section, the data acquisition analyzer is controlled to analyze the output signal of the vibration sensor and the output signal of the microphone, so that the sloshing sound information of the battery to be tested wrapped on the brake section information is obtained.
In one embodiment of the present application, the method further comprises: acquiring standard sloshing sound information corresponding to the brake section information; and comparing the sloshing sound information of the battery pack to be tested under the brake section information with the standard sloshing sound information, and determining whether the battery pack to be tested is qualified according to a comparison result.
In one embodiment of the present application, the microphone includes a first microphone disposed in front of the battery pack to be tested and a second microphone disposed above the battery pack to be tested.
In an embodiment of the application, a distance between the first microphone and the front side envelope surface of the battery pack to be tested is the same as a distance between the second microphone and the upper side envelope surface of the battery pack to be tested, and a value range of the distance is 400-500 mm.
In one embodiment of the application, the detection vehicle is controlled to perform multiple tests on the brake section, and candidate sloshing sound information of the battery pack to be tested under the brake section after each test is determined according to the data acquisition analyzer; and determining the battery pack to be tested of the sloshing sound information of the battery pack to be tested on the brake section information according to the candidate sloshing sound information obtained by each test for multiple times.
In an embodiment of the application, the determining the sloshing sound information of the battery pack to be tested on the brake section information according to the candidate sloshing sound information obtained by each of the multiple tests includes: and selecting the candidate sloshing sound information with the maximum loudness peak value from the candidate sloshing sound information obtained by the multiple tests as the sloshing sound information to-be-tested battery pack of the to-be-tested battery pack on the brake road section information.
According to the battery pack sloshing sound testing method, after the battery pack to be tested is fixed on the detection vehicle in a tooling mode, the vibration sensor and the microphone are distributed on the battery pack to be tested, the detection vehicle stably runs to the starting point of the brake section corresponding to the brake section information according to the brake section information in the detection vehicle, braking is started, and the detection vehicle stops at the end point of the brake section, and in the process that the detection vehicle brakes on the brake section, the data acquisition analyzer is controlled to analyze the output signal of the vibration sensor and the output signal of the microphone, so that sloshing sound information of the battery pack to be tested on the brake section information is obtained. Therefore, all sloshing sounds generated by the battery pack in the actual working condition during the driving and the passing of the vehicle can be truly simulated, and the noise level of the battery pack in the braking process can be accurately measured.
In order to achieve the above object, a battery pack sloshing test system is provided in an embodiment of a second aspect of the present application, and includes a battery pack to be tested and a detection vehicle, where the detection vehicle includes a vibration sensor, a microphone, a data acquisition analyzer, and a controller, and the controller and the data acquisition analyzer; the detection vehicle is used for placing the battery pack to be tested; the battery pack to be tested is characterized in that a vibration sensor is arranged on the surface of the battery pack to be tested, and a microphone is arranged around the battery pack to be tested, wherein the vibration sensor and the microphone are both connected with the data acquisition analyzer; the controller is used for smoothly running the detection vehicle to the starting point of the brake section corresponding to the brake section information according to the brake section information in the detection vehicle, starting braking, stopping at the end point of the brake section, and controlling the data acquisition analyzer to analyze the output signal of the vibration sensor and the output signal of the microphone in the process that the detection vehicle brakes at the brake section so as to obtain the sloshing sound information of the battery pack to be tested on the brake section information.
In an embodiment of the application, the controller is further configured to obtain standard sloshing sound information corresponding to the brake road section, compare the sloshing sound information of the battery pack to be tested under the brake road section information with the standard sloshing sound information, and determine whether the battery pack to be tested is qualified according to a comparison result.
In one embodiment of the present application, the microphone includes a first microphone disposed in front of the battery pack to be tested and a second microphone disposed above the battery pack to be tested.
In an embodiment of the application, a distance between the first microphone and the front side envelope surface of the battery pack to be tested is the same as a distance between the second microphone and the upper side envelope surface of the battery pack to be tested, and a value range of the distance is 400-500 mm.
After a battery pack to be tested is fixed on a detection vehicle in a tooling mode, a vibration sensor and a microphone are arranged on the battery pack to be tested, the detection vehicle stably runs to the starting point of a brake road section corresponding to the brake road section information according to the brake road section information in the detection vehicle, braking is started until the end point of the brake road section stops, and in the process that the detection vehicle brakes on the brake road section, a data acquisition analyzer is controlled to analyze an output signal of the vibration sensor and an output signal of the microphone so as to obtain the sloshing sound information of the battery pack to be tested on the brake road section information. Therefore, all sloshing sounds generated by the battery pack in the actual working condition during the driving and the passing of the vehicle can be truly simulated, and the noise level of the battery pack in the braking process can be accurately measured.
In order to achieve the above object, a test vehicle according to a third embodiment of the present application includes a battery pack sloshing sound testing system as described in any one of the above.
In order to achieve the above object, a fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the battery pack sloshing sound testing method as described above.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow diagram of a battery pack sloshing test method according to one embodiment of the present application;
FIG. 2 is a schematic diagram of arranging a vibration sensor on a battery pack to be detected according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an embodiment of the present application showing a microphone disposed about a battery pack to be tested;
fig. 4 is a schematic structural diagram of a battery pack sloshing test system according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The battery pack sloshing sound test method, device and electric vehicle according to the embodiments of the present application are described below with reference to the drawings.
Fig. 1 is a schematic flow chart of a battery pack sloshing test method according to an embodiment of the present application.
As shown in fig. 1, the battery pack sloshing sound testing method may include:
step 101, fixing a battery pack to be tested on a detection vehicle through a tool, wherein the fixing mode of the battery pack to be tested on the detection vehicle is the same as that of the battery pack to be tested during assembly on the whole vehicle.
It should be noted that the detection vehicle in this embodiment is powered by a battery pack.
In this embodiment, can be fixed in the position that detects the car and be used for placing the battery package with the battery package that awaits measuring through the frock on, wherein, the position that is used for placing the battery package is located the carriage of detecting the car inside.
In an embodiment of the present application, referring to fig. 2 and 3, in order to fix the battery pack to be tested, the testing vehicle may further include a mounting bracket 2 and two straps 3, the mounting bracket 2 is fixed in the carriage 7, a top surface of the mounting bracket is a battery pack fixing surface to be tested, and the battery pack to be tested 1 is fixed on the battery pack fixing surface to be tested of the mounting bracket 2 through the two straps 3.
In this embodiment, the fixture is adopted for fixing, so that the fixing mode of the tested battery pack to be tested 1 is the same as that of the battery pack to be tested when the battery pack to be tested is assembled on a whole vehicle, the relevance between the test state and the actual working state of the battery pack to be tested 1 is high, correspondingly, the data obtained by testing has a reference value, and 25% of the original electrolyte is added.
102, arranging a vibration sensor on the surface of the battery pack to be tested, and arranging a microphone around the battery pack to be tested, wherein the vibration sensor and the microphone are both connected with a data acquisition analyzer, and the data acquisition analyzer is arranged on the detection vehicle.
In the embodiment, in order to improve the accuracy of the test, a plurality of vibration sensors can be arranged on the surface of the battery pack to be tested. In this embodiment, the arrangement of a plurality of vibration sensors on the surface of the battery pack to be tested is schematically described with reference to fig. 2. As shown in fig. 2, the vibration sensors 4 are disposed on the surface of the battery pack 1 to be tested, one vibration sensor 4 is disposed on each of the left portion, the middle portion and the middle portion of the front side of the battery pack 1 to be tested, and the vibration sensors 4 are located on the center line of the battery pack 1 to be tested in the vertical direction. The left part, the middle part and the middle position of the rear side surface of the battery pack 1 to be tested are respectively provided with a vibration sensor 4, and the vibration sensors 4 are positioned on the central line of the battery pack 1 to be tested in the vertical direction. The center of the top surface of the battery pack 1 to be tested is provided with a vibration sensor 4, and two ends of the binding band 3 are respectively provided with the vibration sensor 4.
Note that, in fig. 2, the vibration sensor is indicated by small black dots.
In this embodiment, in order to improve the accuracy of the test, a plurality of microphones may be arranged on the battery pack to be tested.
The plurality of microphones may be disposed in front of the battery pack, may be disposed above the battery pack, and may have a part of the microphones disposed above the battery pack and a part of the microphones disposed in front of the battery pack. For example, as shown in fig. 3, three microphone brackets may be fixed to the ceiling surface of the vehicle compartment 7, and a microphone may be mounted and fixed to each of the microphone brackets 6.
In one embodiment of the present application, the microphone may include a first sensor and a second sensor, and the first microphone may be disposed in front of the battery pack to be tested and the second microphone may be disposed above the battery pack to be tested.
The number of the first sensor and the second sensor may be one or more, and in the process of practical application, the number of the sensors may be set according to specific implementation requirements, which is not limited in this embodiment.
In the present embodiment, a microphone holder for fixing the microphone may be provided inside the cabin of the test vehicle in order to fix the microphone.
In this embodiment, in order to further improve the accuracy of the test, the distance between the first microphone and the front envelope surface of the battery pack may be the same as the distance between the second microphone and the upper envelope surface of the battery pack.
Wherein the distance ranges from 400 mm to 500 mm.
The vibration sensor 4 and the microphone 5 are common detection devices, the specific structure of the vibration sensor 4 and the microphone 5 is not described in detail in the invention, and the vibration sensor 4 and the microphone 5 output signals to the data acquisition analyzer.
And 103, according to the brake section information in the detection vehicle, stably running the detection vehicle to the starting point of the brake section corresponding to the brake section information, starting braking, stopping to the end point of the brake section, and controlling a data acquisition analyzer to analyze the output signal of the vibration sensor and the output signal of the microphone in the process that the detection vehicle brakes on the brake section so as to obtain the sloshing sound information of the battery pack to be tested on the brake section information.
In this embodiment, the specific implementation manner of analyzing the output signal of the vibration sensor and the output signal of the microphone by the data acquisition analyzer to obtain the sloshing sound information of the battery pack to be tested on the routing path information may be as follows: the data acquisition analyzer analyzes and processes the acquired signals, the vibration signal of the vibration sensor 4 is used as a reference, a loudness curve is obtained by the sound pressure signal of the microphone 5, based on the principle that the recognition time interval of human ears to sound is more than 500ms, 0.5s is used as a time step, the frequency resolution is 10Hz, and the calculation formula of the loudness is
Wherein M is loudness, LM is loudness level, and a loudness curve is obtained through the calculation formula.
The battery pack sloshing sound level is judged through the loudness curve, namely, the number of all wave crests of the loudness curve is extracted, the number of times of battery pack sloshing sound appearing in the curve is obtained by eliminating the number of background noise wave crests in the loudness curve and the number of wave crests which cannot be identified by human ears, and meanwhile, the loudness peak value in the loudness curve is read and serves as another index for evaluating the battery pack sloshing sound level. The more the number of defined sloshing sounds is, the larger the loudness peak value is, and the worse the sloshing sound level of the battery pack single body is.
In this embodiment, the battery pack sloshing sound under different working conditions is tested, and corresponding variables are selected for testing according to different testing purposes, and there are two main ways: firstly, the initial braking speed is kept at 25km/h, the braking distance is unchanged, and on the premise that the adding amount of the electrolyte is 25%, 50%, 75% and 100% of the rated volume of the battery pack, data testing is carried out to obtain the battery pack sloshing sound levels with different water amounts. And secondly, keeping the adding amount of water unchanged, and testing the battery pack sloshing sound level at different initial braking speeds and braking distances.
In the embodiment, after the vibration sensor and the microphone are arranged on the surface of the battery pack to be tested, the vehicle is started to ensure that the vehicle is in a good state and no other interference noise exists in the vehicle, the vehicle smoothly runs to the starting point of the brake section at the speed of 25km/h in the horizontal section, the braking is started, the vehicle stops at the end point of the brake section, the braking distance is 3.87m, and the data acquisition analyzer adopts time tracking to record the data of the whole process from the starting of the vehicle braking to the ending of the sloshing sound.
According to the embodiment, the braking distance is limited by the setting of the braking road section, so that the battery pack sloshing sound level under different working conditions is accurately tested, and the NVH performance of the battery pack can be averaged scientifically, repeatedly and objectively.
In this embodiment, in order to reduce the test error, the test vehicle may be controlled to perform multiple tests on the brake section, candidate sloshing sound information of the battery pack to be tested in the brake section after each test is determined according to the data acquisition analyzer, and then the candidate sloshing sound information of the battery pack to be tested in the brake section information is determined according to the candidate sloshing sound information obtained by each of the multiple tests.
In this embodiment, according to candidate sloshing sound information obtained by each of the multiple tests, a specific implementation manner of determining the sloshing sound information of the battery pack to be tested under the route section information is as follows: and selecting the candidate sloshing sound information with the maximum loudness peak value from the candidate sloshing sound information obtained by the multiple tests as the sloshing sound information of the battery pack to be tested on the route section information. That is, in the present embodiment, in order to reduce the test error, the test may be repeated a plurality of times, for example, the number of times of the test is 15 times or more, and among the obtained plurality of sets of data processing results, the data processing result having the maximum loudness peak is selected as the battery pack sloshing sound level in this condition.
According to the battery pack sloshing sound testing method, after the battery pack to be tested is fixed on the detection vehicle in a tooling mode, the vibration sensor and the microphone are distributed on the battery pack to be tested, the detection vehicle stably runs to the starting point of the brake section corresponding to the brake section information according to the brake section information in the detection vehicle, braking is started, and the detection vehicle stops at the end point of the brake section, and in the process that the detection vehicle brakes on the brake section, the data acquisition analyzer is controlled to analyze the output signal of the vibration sensor and the output signal of the microphone, so that sloshing sound information of the battery pack to be tested on the brake section information is obtained. Therefore, all sloshing sounds generated by the battery pack in the actual working condition during the driving and the passing of the vehicle can be truly simulated, and the noise level of the battery pack in the braking process can be accurately measured.
Based on the above embodiment, in order to further determine whether the battery pack to be tested is qualified, the battery pack sloshing test method of this embodiment may further include: acquiring standard sloshing sound information corresponding to the brake section information; and comparing the sloshing sound information of the battery pack to be tested under the route section information with the standard sloshing sound information, and determining whether the battery pack to be tested is qualified or not according to the comparison result.
Specifically, whether the difference value between the sloshing sound information and the standard sloshing sound information of the battery pack to be tested under the production route section information is within a preset normal error range or not can be determined, if yes, the battery pack to be tested is determined to be qualified, and if not, the battery pack to be tested is determined to be unqualified.
Fig. 4 is a schematic structural diagram of a battery pack sloshing test system according to an embodiment of the present application.
As shown in fig. 4, the battery pack sloshing sound testing system comprises a detection vehicle 10 and a battery pack 1 to be tested, wherein the detection vehicle 10 comprises a vibration sensor 4, a microphone 5, a data acquisition analyzer 8 and a controller 9, and the controller 9 and the data acquisition analyzer 8;
the detection vehicle is used for placing a battery pack to be tested;
the battery pack testing method comprises the following steps that a vibration sensor 4 is arranged on the surface of a battery pack to be tested, and microphones 5 are arranged around the battery pack to be tested, wherein the vibration sensor 4 and the microphones 5 are both connected with a data acquisition analyzer 8;
and the controller 9 is used for smoothly running the detection vehicle to the starting point of the brake section corresponding to the brake section information according to the brake section information in the detection vehicle, starting braking, and stopping at the end point of the brake section, and controlling the data acquisition analyzer 8 to analyze the output signal of the vibration sensor 4 and the output signal of the microphone 5 in the process that the detection vehicle brakes at the brake section so as to obtain the sloshing sound information of the battery pack to be tested on the brake section information.
In this embodiment, the controller 9 is further configured to obtain standard sloshing sound information corresponding to the brake section, compare the sloshing sound information of the battery pack to be tested under the brake section information with the standard sloshing sound information, and determine whether the battery pack to be tested is qualified according to a comparison result.
In this embodiment the microphones comprise a first microphone arranged in front of the battery pack and a second microphone 5 arranged above the battery pack.
In the embodiment, in order to further improve the accuracy of the test, the distance between the first microphone and the front envelope surface of the battery pack is the same as the distance between the second microphone and the upper envelope surface of the battery pack, and the distance has a value ranging from 400 mm to 500 mm.
It should be noted that the foregoing explanation of the embodiment of the battery pack sloshing sound testing method is also applicable to the battery pack sloshing sound testing system of the embodiment, and the implementation principle thereof is similar, and is not repeated here.
After a battery pack to be tested is fixed on a detection vehicle in a tooling mode, a vibration sensor and a microphone are arranged on the battery pack to be tested, the detection vehicle stably runs to the starting point of a brake road section corresponding to the brake road section information according to the brake road section information in the detection vehicle, braking is started until the end point of the brake road section stops, and in the process that the detection vehicle brakes on the brake road section, a data acquisition analyzer is controlled to analyze an output signal of the vibration sensor and an output signal of the microphone so as to obtain the sloshing sound information of the battery pack to be tested on the brake road section information. Therefore, all sloshing sounds generated by the battery pack in the actual working condition during the driving and the passing of the vehicle can be truly simulated, and the noise level of the battery pack in the braking process can be accurately measured.
In order to achieve the above object, an embodiment of a third aspect of the present application provides an inspection vehicle, including the battery pack sloshing sound testing system of the above embodiment.
The present application also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a battery pack sloshing sound testing method as above.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A battery pack sloshing test method is characterized by comprising the following steps:
fixing a battery pack to be tested on a detection vehicle through a tool, wherein the fixing mode of the battery pack to be tested on the detection vehicle is the same as that of the battery pack to be tested during assembly on a whole vehicle;
arranging a vibration sensor on the surface of the battery pack to be tested, and arranging a microphone around the battery pack to be tested, wherein the vibration sensor and the microphone are both connected with a data acquisition analyzer, and the data acquisition analyzer is arranged on the detection vehicle;
according to the brake section information in the detection vehicle, the detection vehicle is stably operated to the starting point of the brake section corresponding to the brake section information, braking is started, and the detection vehicle stops at the end point of the brake section, and in the process that the detection vehicle brakes at the brake section, the data acquisition analyzer is controlled to analyze the output signal of the vibration sensor and the output signal of the microphone, so that the sloshing sound information of the battery to be tested wrapped on the brake section information is obtained.
2. The method of claim 1, further comprising:
acquiring standard sloshing sound information corresponding to the brake section information;
and comparing the sloshing sound information of the battery pack to be tested under the brake section information with the standard sloshing sound information, and determining whether the battery pack to be tested is qualified according to a comparison result.
3. The method of claim 1, wherein the microphone comprises a first microphone and a second microphone, the first microphone being routed in front of the battery pack to be tested, the second microphone being routed above the battery pack to be tested.
4. The method of claim 1, wherein a distance between the first microphone and a front side envelope surface of the battery pack to be tested is the same as a distance between the second microphone and an upper side envelope surface of the battery pack to be tested, and the distance has a value in a range of 400 mm to 500 mm.
5. The method of claim 1, wherein the inspection vehicle is controlled to perform a plurality of tests on the brake section, and candidate sloshing sound information of the battery pack to be tested under the brake section after each test is determined according to the data acquisition analyzer;
and determining the battery pack to be tested of the sloshing sound information of the battery pack to be tested on the brake section information according to the candidate sloshing sound information obtained by each test for multiple times.
6. The method of claim 5, wherein determining the sloshing sound information of the battery pack to be tested on the brake section information according to the candidate sloshing sound information obtained from each of the plurality of tests comprises:
and selecting the candidate sloshing sound information with the maximum loudness peak value from the candidate sloshing sound information obtained by the multiple tests as the sloshing sound information to-be-tested battery pack of the to-be-tested battery pack on the brake road section information.
7. The battery pack sloshing test system is characterized by comprising a battery pack to be tested and a test vehicle, wherein the test vehicle comprises a vibration sensor, a microphone, a data acquisition analyzer and a controller, and the controller and the data acquisition analyzer;
the detection vehicle is used for placing the battery pack to be tested;
the battery pack to be tested is characterized in that a vibration sensor is arranged on the surface of the battery pack to be tested, and a microphone is arranged around the battery pack to be tested, wherein the vibration sensor and the microphone are both connected with the data acquisition analyzer;
the controller is used for smoothly running the detection vehicle to the starting point of the brake section corresponding to the brake section information according to the brake section information in the detection vehicle, starting braking, stopping at the end point of the brake section, and controlling the data acquisition analyzer to analyze the output signal of the vibration sensor and the output signal of the microphone in the process that the detection vehicle brakes at the brake section so as to obtain the sloshing sound information of the battery pack to be tested on the brake section information.
8. The system of claim 7, wherein the controller is further configured to obtain standard sloshing sound information corresponding to the section of the brake road, compare the sloshing sound information of the battery pack to be tested under the section of the brake road with the standard sloshing sound information, and determine whether the battery pack to be tested is qualified according to the comparison result.
9. The system of claim 7, wherein the microphone comprises a first microphone disposed in front of the battery pack to be tested and a second microphone disposed above the battery pack to be tested.
10. The system of claim 7, wherein the first microphone is spaced from the front envelope surface of the battery pack to be tested by the same distance as the second microphone is spaced from the upper envelope surface of the battery pack to be tested, and the distance is in a range of 400 mm to 500 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112630477A (en) * | 2020-12-25 | 2021-04-09 | 上海捷氢科技有限公司 | Testing device for parts of fuel cell system |
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