CN107478517B - Power battery pack extrusion test device for electric automobile - Google Patents
Power battery pack extrusion test device for electric automobile Download PDFInfo
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- CN107478517B CN107478517B CN201710730329.7A CN201710730329A CN107478517B CN 107478517 B CN107478517 B CN 107478517B CN 201710730329 A CN201710730329 A CN 201710730329A CN 107478517 B CN107478517 B CN 107478517B
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Abstract
The invention provides a power battery pack extrusion test device for an electric automobile, which comprises a mechanical system, a hydraulic system and an electric system, wherein the mechanical system is connected with the hydraulic system; the mechanical system comprises a sample placing platform, wherein one end of the sample placing platform is provided with a hydraulic cylinder supporting column, the other end of the sample placing platform is provided with an extrusion bearing column, an adjusting block is fixed on the extrusion bearing column, four top corners of the sample placing platform are respectively connected with a column, the sample placing platform is lifted by a lifting device, and a water pool is arranged below the sample placing platform; the hydraulic system comprises a hydraulic cylinder and an extrusion head mounting plate, the hydraulic cylinder is fixed on a hydraulic cylinder supporting upright post, the extrusion head is mounted on the extrusion mounting plate, and a hydraulic cylinder push rod stretches out to push the extrusion head to horizontally extrude the battery. After the battery fires in the test process, the platform can be lowered into the water pool through the lifting device to realize fire extinguishment; the defect that effective measures cannot be taken to control risks when safety problems occur in the process of the battery pack extrusion test is overcome, and the safety and reliability of the test are improved.
Description
Technical Field
The invention belongs to the technical field of battery detection, and particularly relates to a power battery pack extrusion test device for an electric automobile.
Background
In recent years, the industrialization process of electric vehicles at home and abroad has been greatly advanced, and the demonstration and popularization of electric vehicles have achieved a certain result, and have started to go into ordinary families. As one of the key parts of the electric automobile, the battery pack testing and evaluating technology has attracted a great deal of attention, and related international standards and national standards are also in the process of coming out of the counter. Among them, the battery pack extrusion safety test evaluation is a main content of the evaluation system, and provides sufficient technical and data support in terms of engineering development tests, product verification, drafting revision of standard regulations, and the like.
On the other hand, with the development of electric vehicles, the application of battery packs is increasing, and safety accidents such as collision and the like often occur in the whole vehicle use of the battery packs, so that the safety problems are also gradually revealed. Therefore, the method is used for carrying out the test, evaluation and research of the extrusion safety of the battery pack, simulating the safety accident in the use process of the real vehicle, and being beneficial to judging the safety of the battery pack system under the emergency condition, and promoting the healthy, rapid and stable development of the electric vehicle. Therefore, developing a power battery pack extrusion test device for an electric vehicle is a problem to be solved urgently.
Disclosure of Invention
In view of the above, the invention aims to provide a power battery pack extrusion test device for an electric automobile with high automation degree, which can adapt to extrusion test requirements of battery pack samples with different sizes and different conditions, can perform rapid fire extinguishing treatment when safety problems occur, and ensures the safety and the high efficiency of extrusion safety tests.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the power battery pack extrusion test device for the electric automobile comprises a mechanical system and a hydraulic system;
the mechanical system comprises a sample placing platform, wherein one end of the sample placing platform is provided with a hydraulic cylinder supporting column, the other end of the sample placing platform is provided with an extrusion bearing column, an adjusting block is fixed on the extrusion bearing column, four top corners of the sample placing platform are respectively connected with a column, the sample placing platform is lifted by a lifting device so as to adjust the positions of the center of a battery and the extrusion head, a water tank is arranged below the sample placing platform, and when the battery catches fire, the sample placing plane can be lowered into the water tank by the lifting device to extinguish the fire;
the hydraulic system comprises a hydraulic cylinder and an extrusion head mounting plate, wherein the hydraulic cylinder is fixed on a hydraulic cylinder supporting upright post, a threaded hole is formed in the extrusion head mounting plate, the extrusion head can be transversely or vertically placed on the extrusion mounting plate, and a hydraulic cylinder push rod stretches out to push the extrusion head to horizontally extrude the battery.
Further, the lifting device comprises a motor, a speed reducer, a synchronizing shaft, a screw and four screw rods, wherein the two screw rods penetrate through the stand column and are connected with a framework of the hydraulic cylinder supporting stand column, the two screw rods penetrate through the stand column and are connected with a framework of the extrusion bearing stand column, the screw rods are provided with the screw nuts, the screw nuts are fixed with the stand column, the screw rods are respectively arranged at the positions of the screw rods on the framework of the hydraulic cylinder supporting stand column and the top of the extrusion bearing stand column, an output shaft of the motor is connected with an input shaft of the first speed reducer, the first speed reducer drives second speed reducers which are oppositely arranged at two sides of the first speed reducer, the second speed reducers synchronously drive the third speed reducers through the synchronizing shaft, and the third speed reducers drive the screw rods to rotate to drive the sample placing platform to lift up and down.
Furthermore, limit switches are arranged at two ends of the screw rod to limit the lifting of the sample placing platform.
Further, the bottoms of the sample placing platform and the upright post are respectively provided with a guide wheel, so that the sample placing platform plays a role in guiding and positioning when the sample placing platform is lifted, and the left and right shaking of the sample placing platform during lifting can be reduced.
Further, a hoisting device is arranged on the frame of the hydraulic cylinder supporting upright post and the top of the extrusion bearing upright post, the hoisting device comprises an electric hoist, an electric hoist guide rail and a guide rail bracket arranged on the frame, the electric hoist guide rail is arranged on the guide rail bracket, and the electric hoist is arranged on the electric hoist guide rail and used for moving the left and right positions of the battery on the sample placing platform.
Furthermore, in order to prevent the hydraulic cylinder head from sagging when the extension stroke of the hydraulic cylinder push rod is longer, a suspension bracket is arranged on the hydraulic cylinder head and has guiding function.
Further, the hydraulic cylinder supporting upright post and the extrusion bearing upright post are formed by welding steel plates and section steel, have enough rigidity and strength to bear the extrusion force of 50t, and are respectively fixedly installed on foundation bolts of a concrete foundation and are connected through two high-strength steel pipes.
Further, the sample placement platform consisted of 3 500mm thick carrier plates, used in conjunction with the travel of the hydraulic cylinder 1500, to facilitate smaller size battery crush testing. Guard plates are arranged on the outer sides of the table bodies on the two sides of the sample placing platform, so that the hydraulic cylinder components can be prevented from being damaged when the batteries burn and explode, and the attractive effect is achieved.
Further, a protective cover is covered on the hydraulic cylinder, and a truss is arranged on the frame.
Further, the device also comprises an electrical system, wherein the electrical system comprises:
the oil source control system is used for controlling the oil source and monitoring the state, including starting and stopping, pressure regulating control, abnormal state monitoring of pressure, temperature, liquid level, filter screen and the like, and can display the pressure and the temperature of the oil source in real time. With both local and remote modes of operation.
The hydraulic servo control system adopts a multifunctional composite controller with the model of FHKZ-2012, has two control modes of displacement and load, can realize high-precision closed-loop control of displacement and load, automatically adjusts loading speed, and has overload protection function for the sensor.
The sensor acquisition system comprises 1 load sensor, 1 displacement sensor, 8 thermocouples and 8 voltage transmitters, wherein the load sensor, the displacement sensor, the thermocouples and the voltage transmitters are respectively connected with a 16-path PCI multifunctional data acquisition card, and the multifunctional data acquisition card and an industrial personal computer transmit data.
The load sensor is arranged at the cylinder head of the hydraulic cylinder, and the push rod of the hydraulic cylinder is contacted with the load sensor through the ball head, so that the measuring error of the sensor caused by assembly and processing errors is reduced, the test result is more accurate, and the device is used for measuring the force value in the extrusion process. The displacement sensor is arranged at the tail end of the piston rod guide rod of the hydraulic cylinder, synchronously moves with the piston rod and is used for measuring the displacement of the hydraulic cylinder and controlling the closed loop of the displacement. The thermocouple is matched with the Hua thermocouple acquisition module for use, is arranged at each temperature measurement point of the battery pack and is used for measuring the temperature change of the battery pack in the test process. The voltage transmitter is connected to the anode and the cathode of the battery pack or the anode and the cathode of the internal module and is used for measuring the voltage change in the test process. The sensor wiring all adopts quick plug, is convenient for install and maintain.
And the video acquisition system adopts a domestic explosion-proof zooming infrared camera and an industrial personal computer to transmit data through an Ethernet, and performs photographing record on a test site.
The computer control system comprises an industrial personal computer, a display and an electrical cabinet. The explosion-proof camera transmits data with the industrial personal computer through the Ethernet, the thermocouple transmits data to the industrial personal computer through the temperature acquisition module, the oil source temperature pressure signal and the signal output by the voltage transmitter are input to the multifunctional data acquisition card through the A/D converter, the multifunctional data acquisition card and the industrial personal computer bidirectionally transmit data, the displacement sensor is connected with the multifunctional composite controller, the multifunctional data acquisition card is connected with the multifunctional composite controller through the D/A converter, the multifunctional composite controller controls the hydraulic cylinder through the hydraulic servo valve, the load sensor is connected with the multifunctional composite controller through the amplifier, and the oil source state signal and the limit switch signal of the hydraulic cylinder are input to the multifunctional acquisition card to be connected, and the industrial personal computer controls the lifting of the oil source, the water pump and the lifting device.
The industrial personal computer presets an instruction, the instruction is processed by software and then is output to the multifunctional composite control card through the analog output card, after the feedback signal of the displacement sensor/load sensor is subtracted from the instruction, the error signal is regulated by PID and then is output to the servo valve, and the servo valve automatically regulates the flow and the pressure, so that the displacement/load high-precision closed-loop control of the hydraulic cylinder is realized. In the test loading process, the control software carries out operation comparison with the actual expected value according to displacement/load signals and speed acquired in real time, and corrects the instruction value in real time, so that the control precision is improved.
Compared with the prior art, the power battery pack extrusion test device for the electric automobile has the following advantages:
(1) The test device adopts the lifting device to adjust the height of the battery, meets the extrusion tests of batteries with different heights, and increases the accuracy of the test; meanwhile, after the battery fires in the test process, the platform can be lowered into a water pool to realize fire extinguishment; the defect that effective measures cannot be taken to control risks when safety problems occur in the process of the battery pack extrusion test is overcome, and the safety and reliability of the test are improved.
(2) The electric system of the test device adopts full closed loop control, has two control modes of force and displacement closed loop control, can realize equal load, equal displacement, fixed load, positioning displacement test, force and displacement multi-stage holding test, and the loading, measurement and positioning are automatically completed by the system, thereby being convenient and reliable and effectively reducing manual operation errors.
(3) The industrial personal computer can set programs according to the needs, and different extrusion deformation and duration time can be provided in sections. The test device can automatically control each parameter of the test bed according to a set program, display curves such as displacement, load, temperature, voltage, speed and the like in real time in the test process, automatically record test related data, realize functions such as test data acquisition, display, storage, inquiry, printing and the like, and have excellent anti-interference capability, excellent repeatability and reliability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the truss assembly according to the present invention;
FIG. 3 is a schematic view of a lifting device in the present invention;
FIG. 4 is a schematic view of the assembled lifting device of the present invention;
FIG. 5 is a schematic diagram of an electrical system of the present invention;
fig. 6 is a schematic diagram of closed-loop control of a hydraulic cylinder according to the present invention.
Reference numerals illustrate:
1-a sample placement platform; 2-a hydraulic cylinder supporting column; 3-extruding the bearing upright post; 4-adjusting the block; 5-stand columns; 6, a pool; 7-an extrusion head; 8-a motor; 9-synchronizing shaft; 10-screw rod; 11-a frame; 12-a third speed reducer; 13-a first speed reducer; 14-a second speed reducer; 15-a guide wheel; 16-electric hoist; 17-an electric hoist guide rail; 18-a guide rail bracket; 19-a protective cover; 20-truss; 21-a battery; 22-ground.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 and 2, a power battery pack extrusion test device for an electric automobile comprises a mechanical system and a hydraulic system; the mechanical system comprises a sample placing platform 1, wherein one end of the sample placing platform 1 is provided with a hydraulic cylinder supporting upright post 2, and the other end of the sample placing platform is provided with an extrusion bearing upright post 3; the three adjusting blocks 4 are fixed on the extrusion bearing upright post 3; the four vertex angles of the sample placement platform 1 are respectively connected with a stand column 5, the sample placement platform 1 is lifted by a lifting device to adjust the center of a battery and the position of an extrusion head, a water tank 6 is arranged below the sample placement platform 1, and when the battery catches fire, the sample placement platform 1 can be lowered into the water tank to extinguish fire by the lifting device. The hydraulic system comprises a hydraulic cylinder, an extrusion head mounting plate and a load sensor, wherein the hydraulic cylinder is fixed on a hydraulic cylinder supporting upright post 2, the load sensor is arranged at the head of the hydraulic cylinder, a push rod of the hydraulic cylinder is in contact with the load sensor through a ball head, the measurement error of the sensor caused by assembly and processing errors is reduced, the test result is more accurate, a threaded hole is formed in the extrusion head mounting plate, an extrusion head 7 can be placed transversely or vertically on the extrusion mounting plate, and the push rod of the hydraulic cylinder stretches out to push the extrusion head to horizontally extrude a battery. In order to prevent the hydraulic cylinder head from sagging when the extension stroke of the hydraulic cylinder push rod is longer, a suspension bracket is arranged on the hydraulic cylinder head and has guiding function. The hydraulic cylinder is covered with a protective cover 19, and a truss 20 is arranged on the hydraulic cylinder supporting upright post 2 and the frame 11 which presses the top of the bearing upright post 3.
The hydraulic cylinder supporting upright 2 and the extrusion bearing upright 3 are formed by welding steel plates and profile steel, have enough rigidity and strength to bear the extrusion force of 50t, and the hydraulic cylinder supporting upright 2 and the extrusion bearing upright 3 are respectively and fixedly installed on foundation bolts of a ground 22 concrete foundation and are connected through two high-strength steel pipes. The sample placement platform 1 consisted of three 500mm thick carrier plates used in conjunction with the travel of the hydraulic cylinder 1500 to perform smaller size battery crush tests. Guard plates are arranged on the outer sides of the table bodies on the two sides of the sample placing platform 1, so that the hydraulic cylinder components can be prevented from being damaged when the batteries burn and explode, and the attractive effect is achieved.
As shown in fig. 3 and 4, the lifting device comprises a motor 8, a speed reducer, a synchronizing shaft 9, a screw nut and four screw rods 10, wherein the two screw rods 10 penetrate through the upright posts 5 and are connected with a frame of the hydraulic cylinder supporting upright post 2, the two screw rods 10 penetrate through the upright posts 5 and are connected with a frame 11 of the extrusion bearing upright post 3, the screw nut is arranged on the screw rods 10, the screw nut is fixed with the upright posts 5, a third speed reducer 12 is respectively arranged at the positions of the screw rods 10 on the frame 11 at the tops of the hydraulic cylinder supporting upright post 2 and the extrusion bearing upright post 3, an output shaft of the motor 8 is connected with an input shaft of a first speed reducer 13, the first speed reducer 13 drives second speed reducers 14 which are oppositely arranged at two sides of the first speed reducer, the second speed reducer 14 synchronously drives the third speed reducer 12 through the synchronizing shaft 9, the third speed reducer 12 drives the screw rods 10 to rotate, the sample placing platform 1 is driven to lift up and down, and limit switches are arranged at two ends of the screw rods 10 to limit the lifting of the sample placing platform 1. The bottom of sample place platform 1 and stand 5 is equipped with leading wheel 15 respectively, when lifting sample place platform 1, plays the effect of direction location, also can reduce sample place platform 1 and rock about when lifting.
As shown in fig. 1, a lifting device is arranged on the frame 11 on the top of the hydraulic cylinder supporting upright 2 and the extrusion bearing upright 3, the lifting device comprises an electric hoist 16, an electric hoist guide rail 17 and a guide rail bracket 18 arranged on the frame 11, the electric hoist guide rail 17 is arranged on the guide rail bracket 18, and the electric hoist 16 is arranged on the electric hoist guide rail 17 and used for moving a battery at a left-right position on the sample placing platform 1.
The apparatus also includes an electrical system comprising:
the oil source control system is used for controlling the oil source and monitoring the state, including starting and stopping, pressure regulating control, abnormal state monitoring of pressure, temperature, liquid level, filter screen and the like, and can display the pressure and the temperature of the oil source in real time. With both local and remote modes of operation.
The hydraulic servo control system adopts a multifunctional composite controller with the model of FHKZ-2012, has two control modes of displacement and load, can realize high-precision closed-loop control of displacement and load, automatically adjusts loading speed, and has overload protection function for the sensor.
The sensor acquisition system comprises 1 path of load, 1 path of displacement, 8 paths of temperature and 8 paths of voltage signals, the signals are acquired through a 16 path PCI multifunctional data acquisition card, and the multifunctional data acquisition card and an industrial personal computer transmit data.
Load sensor: the inlet spoke type load sensor is adopted, the measuring range is 60t, the precision is 0.1%, the inlet spoke type load sensor is arranged at the cylinder head of the hydraulic cylinder, the push rod of the hydraulic cylinder is contacted with the load sensor through the ball head, the measuring error of the sensor caused by assembly and processing errors is reduced, the test result is more accurate, and the pressure measuring device is used for measuring the force value in the extrusion process.
A displacement sensor: the German NOVO potentiometer type TLH series displacement sensor is adopted, and the measuring range is 1500mm. The device is arranged at the tail end of a guide rod of a piston rod of the hydraulic cylinder, synchronously moves with the piston rod and is used for displacement measurement and displacement closed-loop control of the hydraulic cylinder.
Thermocouple: the K-type thermocouple is adopted, the temperature range is 0-1200 ℃, and the thermocouple acquisition module is researched. The temperature measuring device is arranged at each temperature measuring point of the battery pack and is used for measuring the temperature change of the battery pack in the test process.
A voltage transmitter: the precision grade is 0.2% by adopting a domestic direct-current voltage transmitter. And the battery pack is connected to the anode and the cathode of the battery pack or the anode and the cathode of the internal module and is used for measuring the voltage change in the test process.
The sensor wiring all adopts quick plug, is convenient for install and maintain.
And the video acquisition system adopts a domestic explosion-proof zooming infrared camera and an industrial personal computer to transmit data through an Ethernet, and performs photographing record on a test site. The explosion-proof zoom infrared camera is 130 ten thousand pixel network high definition. Explosion-proof class B, infrared distance 80 m, 18 times optical zoom. 130 ten thousand network cores of China, automatic focusing, ONVIF protocol support, various NVRs such as Haikang Dahua, high-hardness high-quality 304 stainless steel manufacture, protection grade IP66, built-in heat dissipation device and AC110V-240V power supply. A special bracket for a carbon steel explosion-proof camera and an explosion-proof connecting pipe are used for installation.
The computer control system comprises an industrial personal computer, a display and an electrical cabinet. Wherein the industrial personal computer adopts an industrial personal computer originally installed on the grinding and auspicious military industrial grade IPC-820, an E5300CPU, a 2G memory and a 500G hard disk. The display employs an AOC22 liquid crystal display. The electric cabinet adopts a desk type nonstandard electric cabinet, so that the test operation is convenient.
As shown in fig. 5, the explosion-proof camera transmits data with the industrial personal computer through the ethernet, the thermocouple transmits data to the industrial personal computer through the temperature acquisition module, the oil source temperature pressure signal and the signal output by the voltage transmitter are input to the multifunctional data acquisition card through the a/D converter, the multifunctional data acquisition card and the industrial personal computer bidirectionally transmit data, the displacement sensor is connected with the multifunctional composite controller, the multifunctional data acquisition card is connected with the multifunctional composite controller through the D/a converter, the multifunctional composite controller controls the hydraulic cylinder through the hydraulic servo valve, the load sensor is connected with the multifunctional composite controller through the amplifier, and the oil source state signal and the limit switch signal of the hydraulic cylinder are input to the multifunctional acquisition card to be connected, and the industrial personal computer controls the lifting of the oil source, the water pump and the lifting device.
As shown in fig. 6, the industrial personal computer presets an instruction, the instruction is processed by software and then is output to the multifunctional composite control card through the analog output card, after the feedback signal of the displacement sensor/load sensor is subtracted from the instruction, the error signal is regulated by the PID and then is output to the servo valve, and the servo valve automatically regulates the flow and the pressure, so that the displacement/load high-precision closed-loop control of the hydraulic cylinder is realized. In the test loading process, the control software carries out operation comparison with the actual expected value according to displacement/load signals and speed acquired in real time, and corrects the instruction value in real time, so that the control precision is improved.
The working procedure of this example: the battery 21 to be tested is placed on the sample placing platform 1 by a forklift, and the sample placing platform 1 can be lifted by a lifting device so as to adjust the center of the battery 21 and the position of the extrusion head 7. The push rod of the hydraulic cylinder stretches out to push the extrusion head 7 to horizontally extrude the battery 21, the lower part of the sample placing platform 1 is provided with a water tank 6, and when the battery 21 catches fire, the sample placing platform 1 can be lowered into the water tank 6 through the lead screw 10 and the motor 8 to extinguish fire. The water tank is provided with a water pump for automatically discharging sewage after fire extinguishment. In addition, the guard plates can be arranged on the outer sides of the two side table bodies of the test bed, so that the hydraulic cylinder components can be prevented from being damaged when the battery burns and explodes, and the attractive effect is achieved. The upper part of the test stand is provided with a movable electric hoist for moving the battery 21 left and right on the placement platform 1. The device can also adopt an electrical system, and is controlled by an oil source control system, a hydraulic servo control system, a sensor acquisition system, a video acquisition system, a computer control system and the like, so that equal load, equal displacement, fixed load, positioning displacement test, force and displacement multi-stage holding test are realized, and loading, measurement and positioning are automatically completed by the system, thereby being convenient and reliable.
As shown in fig. 6, the industrial personal computer presets an instruction, the instruction is processed by software and then is output to the multifunctional composite control card through the analog output card, after the feedback signal of the displacement sensor/load sensor is subtracted from the instruction, the error signal is regulated by the PID and then is output to the servo valve, and the servo valve automatically regulates the flow and the pressure, so that the displacement/load high-precision closed-loop control of the hydraulic cylinder is realized. In the test loading process, the control software carries out operation comparison with the actual expected value according to displacement/load signals and speed acquired in real time, and corrects the instruction value in real time, so that the control precision is improved. The loading channel of the test device adopts full closed loop control, has two control modes of force and displacement closed loop control, can realize equal load, equal displacement, fixed load, positioning displacement test and force and displacement multi-stage holding test, and the loading, measurement and positioning are automatically completed by the system, thereby being convenient and reliable and effectively reducing manual operation errors.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The utility model provides a power battery package extrusion test device for electric automobile which characterized in that: including mechanical and hydraulic systems;
the mechanical system comprises a sample placing platform, wherein one end of the sample placing platform is provided with a hydraulic cylinder supporting column, the other end of the sample placing platform is provided with an extrusion bearing column, an adjusting block is fixed on the extrusion bearing column, four top corners of the sample placing platform are respectively connected with a column, the sample placing platform is lifted through a lifting device, and a water pool is arranged below the sample placing platform;
the hydraulic system comprises a hydraulic cylinder and an extrusion head mounting plate, wherein the hydraulic cylinder is fixed on a hydraulic cylinder supporting upright post, the extrusion head is mounted on the extrusion head mounting plate, and a hydraulic cylinder push rod extends out to push the extrusion head to horizontally extrude the battery;
the lifting device comprises a motor, a speed reducer, a synchronous shaft, a screw and four screw rods, wherein the two screw rods penetrate through the stand column and are connected with a frame of the hydraulic cylinder supporting stand column, the two screw rods penetrate through the stand column and are connected with a frame of the extrusion bearing stand column, the screw rods are provided with the screw nuts, the screw nuts are fixed with the stand column, the positions, located at the screw rods, of the frame of the hydraulic cylinder supporting stand column and the top of the extrusion bearing stand column are respectively provided with a third speed reducer, an output shaft of the motor is connected with an input shaft of the first speed reducer, the first speed reducer drives second speed reducers which are oppositely arranged at two sides of the first speed reducer, the second speed reducer synchronously drives the third speed reducers through the synchronous shaft, and the third speed reducer drives the screw rods to rotate so as to drive the sample placing platform to lift up and down;
the hydraulic cylinder supporting column and the frame extruding the top of the bearing column are provided with lifting devices, each lifting device comprises an electric hoist, an electric hoist guide rail and a guide rail bracket arranged on the frame, each guide rail bracket is provided with an electric hoist guide rail, and each electric hoist guide rail is provided with an electric hoist.
2. The power battery pack extrusion test device for an electric automobile according to claim 1, wherein: a suspension bracket is arranged on the cylinder head of the hydraulic cylinder.
3. The power battery pack extrusion test device for an electric automobile according to claim 1, wherein: and guide wheels are respectively arranged at the bottoms of the sample placing platform and the upright post.
4. The power battery pack extrusion test device for an electric automobile according to claim 1, wherein: the sample placing platform consists of 3 bearing plates with the thickness of 500mm, and guard plates are arranged on the outer sides of the table bodies on the two sides of the sample placing platform.
5. The power battery pack extrusion test device for an electric automobile according to claim 4, wherein: the hydraulic cylinder is covered with a protective cover, and the frame is provided with a truss.
6. The power battery pack extrusion test device for an electric automobile according to claim 1, wherein: the hydraulic cylinder supporting stand column and the extrusion bearing stand column are formed by welding steel plates and section steel, and are respectively and fixedly installed on foundation bolts of a concrete foundation.
7. The power battery pack extrusion test device for an electric automobile according to claim 1, wherein: the apparatus also includes an electrical system comprising:
the oil source control system is used for controlling and monitoring the state of an oil source, and comprises start-stop control, pressure regulation control, pressure, temperature, liquid level and abnormal state monitoring of a filter screen, and displaying the pressure and the temperature of the oil source in real time;
the hydraulic servo control system adopts a multifunctional composite controller with the model of FHKZ-2012, has two control modes of displacement and load, and realizes high-precision closed-loop control of displacement and load;
the sensor acquisition system comprises a load sensor, a displacement sensor, a thermocouple and a voltage transmitter; the load sensor is arranged at the cylinder head of the hydraulic cylinder, and the push rod of the hydraulic cylinder is contacted with the load sensor through a ball head and is used for measuring a force value in the extrusion process; the displacement sensor is arranged at the tail end of the piston rod guide rod of the hydraulic cylinder, moves synchronously with the piston rod and is used for measuring the displacement of the hydraulic cylinder and controlling the displacement in a closed loop; the thermocouple and the Hua-in thermocouple acquisition module are matched and used, are arranged at each temperature measurement point of the battery pack and are used for measuring the temperature change of the battery pack in the test process; the voltage transmitter is connected to the anode and the cathode of the battery pack or the anode and the cathode of the internal module and used for measuring the voltage change in the test process;
the video acquisition system adopts a domestic explosion-proof zooming infrared camera and an industrial personal computer to transmit data through an Ethernet, and photographs and records a test site;
the computer control system comprises an industrial personal computer, a display and an electrical cabinet;
the explosion-proof camera transmits data with the industrial personal computer through the Ethernet, the thermocouple transmits data to the industrial personal computer through the temperature acquisition module, the oil source temperature pressure signal and the signal output by the voltage transmitter are input to the multifunctional data acquisition card through the A/D converter, the multifunctional data acquisition card and the industrial personal computer bidirectionally transmit data, the displacement sensor is connected with the multifunctional composite controller, the multifunctional data acquisition card is connected with the multifunctional composite controller through the D/A converter, the multifunctional composite controller controls the hydraulic cylinder through the hydraulic servo valve, the load sensor is connected with the multifunctional composite controller through the amplifier, and the oil source state signal and the limit switch signal of the hydraulic cylinder are input to the multifunctional acquisition card to be connected, and the industrial personal computer controls the lifting of the oil source, the water pump and the lifting device.
8. The power battery pack extrusion test device for an electric automobile according to claim 7, wherein: the industrial personal computer presets an instruction, the instruction is processed by software and then is output to the multifunctional composite control card through the analog output card, after the feedback signal of the displacement sensor/load sensor is subtracted from the instruction, the error signal is regulated by PID and then is output to the servo valve, and the servo valve automatically regulates the flow and the pressure, so that the displacement/load high-precision closed-loop control of the hydraulic cylinder is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730329.7A CN107478517B (en) | 2017-08-23 | Power battery pack extrusion test device for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730329.7A CN107478517B (en) | 2017-08-23 | Power battery pack extrusion test device for electric automobile |
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| Publication Number | Publication Date |
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| CN107478517A CN107478517A (en) | 2017-12-15 |
| CN107478517B true CN107478517B (en) | 2023-10-03 |
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Address after: 300000 Tianlin road junction, Cheng Lin Zhuang Road, Dongli District, Tianjin (south of Cheng Lin Zhuang Road) Patentee after: CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER Co.,Ltd. Address before: 300000 Tianlin road junction, Cheng Lin Zhuang Road, Dongli District, Tianjin (south of Cheng Lin Zhuang Road) Patentee before: CHINA AUTOMOTIVE TECHNOLOGY & RESEARCH CENTER |