New energy automobile power battery bottom scraping collision test bench and test method

Abstract

The invention relates to a new energy automobile power battery bottom scraping collision test bench and a test method. The method comprises the steps of fixing a power battery, fixing a barrier, sealing a test box, performing equipment operation self-inspection, setting test working conditions and test parameters, downloading test numbers, judging whether a test box opening condition exists or not, and arranging test equipment. According to the test bench, the power battery is used as a test object, the power battery is installed on the movable sliding table of the test cabin, the movable sliding table is driven to run to enable the power battery to collide with the bottom scraping barrier, and deeper research is carried out on the characteristics and safety design of the power battery according to collected test data; the test bench simulates various working conditions and carries out a bottom scraping test on the power battery, so that the test is carried out in a harsh environment, and the situation that the safety design of the power battery is not comprehensive due to the influence of a test site environment is avoided; the test bed has test conditions for guaranteeing the personal safety of test operators when the power battery explodes or is on fire due to test damage.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a power battery bottom scraping collision test bench and a test method. Background Art

[0002] As an important carrier of the new four modernizations, new energy vehicles have bred new development opportunities, but also brought many new challenges. In 2023, the sales of new energy vehicles reached 9.495 million, a year-on-year increase of 37.9%. At the same time, the battery safety of new energy vehicles has attracted public attention. In order to continuously improve the requirements for vehicle battery safety design and development and provide consumers with multi-angle vehicle selection information, it is necessary to continuously improve the passive safety design scheme of new energy vehicle power batteries. This requires reference to the domestic traffic safety situation and continuous improvement of the passive safety test capabilities of new energy vehicles.

[0003] Compared with traditional fuel vehicles, if the new energy vehicle scrapes the bottom during driving and causes battery damage, it may cause fire if it is not handled in time due to negligence. This kind of car collision condition often occurs. However, there is no safety risk for traditional fuel vehicles. Therefore, most domestic vehicle collision test laboratories often lack this test capability. With the continuous development of new energy vehicles, their special passive safety test capabilities should be continuously improved. Based on this, the development of a power battery scraping bottom collision test bench and the formation of corresponding test methods are of great significance to promoting the development of new energy vehicles in my country. Summary of the invention

[0004] The purpose of the present invention is to provide a new energy vehicle power battery scraping bottom collision test bench and a corresponding test method. The test bench can simulate temperature, humidity, air pressure, load and other working conditions and carry out scraping bottom tests on power batteries, so as to solve the problem of truly simulating the power battery to carry out scraping bottom test conditions, and when the power battery explodes or catches fire due to test damage, the test conditions are provided to ensure the personal safety of the test operators.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A new energy vehicle power battery scraping bottom collision test bench, which consists of a drive system, a mobile slide, a programmable electronic load, a temperature control system, a humidity control system, a charging and ventilation system, an inert gas filler, a barrier installation table installed in the test cabin, a scraping bottom barrier, a high-speed camera, a lighting system, an alarm, a toxic gas detector, an infrared temperature detector, a state monitoring system, a test control system and a central data server;

[0007] The power battery of the test object is fixedly installed on the mobile slide, and the drive system can drive the mobile slide to move left and right. The test control system communicates with the drive system through CAN and adjusts the drive system to make the mobile slide move at the set speed;

[0008] The programmable electronic load can provide working resistance for the power battery, which is used to simulate the discharge environment of the power battery during vehicle driving; the temperature regulation system and the dry and wet regulation system are used to regulate the temperature and humidity in the test chamber; the charging and ventilation system is used to regulate the gas pressure in the test chamber; the test control system communicates with the programmable electronic load, the temperature regulation system and the dry and wet regulation system through CAN;

[0009] The state monitoring system communicates with the toxic gas detector, the infrared temperature detector and the alarm through Ethernet. The state monitoring system is used to determine the abnormal temperature rise or combustion risk of the power battery after the test; when the state monitoring system determines that the power battery has an abnormal temperature rise or a combustion risk through the toxic gas detector and the infrared temperature detector, it will send a command to the alarm to make it sound an alarm;

[0010] The inert gas filler can fill the test chamber with inert gas; when the state monitoring system determines that the power battery has an abnormal temperature rise or combustion risk, it will transmit a signal to the test control system via Ethernet, and the test control system will send a command to the inert gas filler via CAN, and the inert gas filler will work to prevent the power battery from burning;

[0011] The high-speed camera is used to record the collision process and communicate with the status monitoring system; the lighting system provides lighting for the two high-speed cameras, and the status monitoring system communicates with the lighting system via a wireless network; the central data server is used to store and process the test process data, and the status monitoring system sends the data files to the central data server via Ethernet.

[0012] Furthermore, the driving system drives the movable slide table to achieve left and right movement through the lead screw thread.

[0013] Furthermore, the test bench has a temperature adjustment range of -60-60°C and a humidity adjustment range of 5%-90%.

[0014] Furthermore, the pressure adjustment range of the test bench is 77-103 KPa. When the power battery explodes or catches fire due to test damage and produces toxic gases, the toxic gases are stored in a container tank through the ventilation system to be discharged after corresponding chemical treatment.

[0015] Furthermore, the toxic gas detector is used to monitor the toxic gas released after the power battery is burned; the infrared temperature detector is used to monitor the temperature change on the surface of the power battery; and the alarm alerts the test operator through sound and light changes.

[0016] Furthermore, the installation height of the scraping bottom barrier is adjusted according to the size of the power battery, and it is fixed on the mounting platform barrier mounting platform. By adjusting the movement of the movable slide, the power battery and the scraping bottom barrier collide with each other to simulate the scraping bottom collision condition of a new energy vehicle.

[0017] Furthermore, there are two high-speed cameras aimed at the collision contact position at two angles to record the collision process, and the status monitoring system maintains communication with the two high-speed cameras via Ethernet.

[0018] Furthermore, the test bench supports the arrangement of acceleration sensors at key locations on the surface of the power battery as needed to analyze the structural characteristics of the power battery.

[0019] A method for a new energy vehicle power battery bottom scraping collision test comprises the following steps:

[0020] Step S1, start the test; after the test personnel and test subjects are ready, proceed to step S1 to start the test;

[0021] Step S2, fixing the power battery: fixing the power battery on the moving slide by a clamp;

[0022] Step S3, fixing the barrier: fixing the barrier on the barrier mounting platform by a clamp;

[0023] Step S4, closing the test box; if the test box is not closed, the test cannot be performed;

[0024] Step S5, perform a self-check of the equipment operation; put all parts of the test bench into working condition;

[0025] Step S6, setting the test conditions; adjusting the temperature, humidity and air pressure, and keeping the power battery in the environment for a specified time, then turning on the programmable electronic load, and keeping the power battery in a working state for a specified time;

[0026] Step S7, setting test parameters; setting the moving slide speed and high-speed camera and lighting system parameters to ensure that the external sensor acquisition status is normal;

[0027] Step S8, start the test;

[0028] Step S9, downloading test data; downloading the test data and storing it in a central data server;

[0029] Step S10, determine whether the conditions for opening the test box are met; observe the power battery for 2 hours to determine whether there is an abnormal temperature rise or combustion risk. If there is an abnormal temperature rise or combustion risk within 2 hours, the system starts risk prevention measures and enters step S11 after eliminating the risk; if there is no abnormal temperature rise or combustion risk within 2 hours, the test box can be opened and enter step S11;

[0030] Step S11, arranging the test equipment; opening the test box, disassembling the power battery and placing it in an observation room for 24 hours, and arranging the test equipment;

[0031] Go to step S12 and end the test.

[0032] Further, in step S7, the external sensor is an acceleration sensor.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The power battery bottom scraping collision test bench and test method of the present invention use the power battery of a new energy vehicle as the test object, and the power battery is fixedly installed on a movable slide in the test cabin, and the movable slide is driven to cause the power battery to collide with a bottom scraping barrier, and a more in-depth study is carried out on the characteristics and safety design of the power battery based on the collected test data; the test bench simulates temperature, humidity, air pressure, load and other working conditions and carries out bottom scraping tests on the power battery, which can enable the test to be carried out in a more severe environment, thereby avoiding the incomplete safety design of the power battery caused by the influence of the test site environment; at the same time, when the power battery explodes or catches fire due to test damage, the test bench has test conditions to ensure the personal safety of the test operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 Structural diagram of the power battery bottom scraping collision test bench of the present invention;

[0037] Figure 2 A flow chart of the steps of the power battery bottom scraping collision test method of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with embodiments:

[0039] The new energy vehicle power battery bottom scraping collision test bench of the present invention can simulate working conditions such as temperature, humidity, air pressure, load, etc. and carry out bottom scraping tests on the power battery. When the power battery explodes or catches fire due to test damage, the test conditions are met to ensure the personal safety of the test operator.

[0040] like Figure 1 As shown in the figure, the test bench consists of a drive system, a mobile slide, a programmable electronic load, a temperature control system, a humidity control system, a charging and ventilation system, an inert gas filler, a barrier mounting table, a scraping bottom barrier, a high-speed camera, a lighting system, an alarm, a toxic gas detector, an infrared temperature detector, a status monitoring system, a test control system and a central data server. The test object is a power battery, and the upper computer software is programmed in C# language.

[0041] The driving system drives the mobile slide to move left and right through the lead screw thread, and the test object power battery is fixedly installed on the mobile slide; the test control system communicates with the driving system through CAN, and adjusts the driving system to make the mobile slide move at a set speed.

[0042] The programmable electronic load can provide working resistance for the power battery, which is used to simulate the discharge environment of the power battery during vehicle driving. The temperature control system and the dry-wet control system are used to adjust the temperature and humidity in the test cabin. The temperature adjustment range of the test bench is -60-60°C, and the humidity adjustment range is 5%-90%. The charging and ventilation system is used to adjust the gas pressure in the test cabin, and when the power battery explodes or catches fire due to test damage and produces toxic gases, the toxic gases are stored in a container tank through the ventilation system for discharge after corresponding chemical treatment. The pressure adjustment range of the test bench is 77-103KPa (main areas of China). The test control system realizes communication with the programmable electronic load, temperature control system and dry-wet control system through CAN. By adjusting these three parts, it is ensured that the power battery bottom scraping collision test meets the real environmental conditions.

[0043] The state monitoring system maintains communication with the toxic gas detector, infrared temperature detector and alarm through Ethernet. The state monitoring system is used to determine the abnormal temperature rise or combustion risk after the power battery test. Among them, the toxic gas detector is used to monitor the toxic gas (CO) released after the power battery burns. The infrared temperature detector is used to monitor the temperature changes on the surface of the power battery. The alarm alerts the test operator through sound and light changes. When the state monitoring system determines that the power battery has an abnormal temperature rise or a combustion risk through the toxic gas detector and infrared temperature detector, it will send a command to the alarm to make it sound an alarm.

[0044] The inert gas filler can fill the test chamber with inert gas; when the status monitoring system determines that the power battery has an abnormal temperature rise or combustion risk, it will transmit the signal to the test control system via Ethernet, and the test control system will send instructions to the inert gas filler via CAN, and the inert gas filler will work to prevent the power battery from burning.

[0045] The barrier mounting platform is fixedly installed in the test cabin, and the installation height of the scraping bottom barrier is adjusted according to the size of the power battery. Finally, it is fixed on the barrier mounting platform. By adjusting the movement of the movable slide, the power battery collides with the scraping bottom barrier to simulate the scraping bottom collision condition of the new energy vehicle.

[0046] Two high-speed cameras are aimed at the collision contact position at two angles to record the collision process. The status monitoring system maintains communication with the two high-speed cameras via Ethernet.

[0047] The lighting system provides lighting for two high-speed cameras, and the status monitoring system communicates with the lighting system via a wireless network.

[0048] In addition, the test bench supports the arrangement of acceleration sensors at key locations on the surface of the power battery as needed to analyze the structural characteristics of the power battery.

[0049] The central data server is used to store and process test process data, and the condition monitoring system sends data files to the central data server via Ethernet.

[0050] like Figure 2 As shown, the present invention provides a corresponding automobile new energy power battery scraping bottom collision test method, comprising:

[0051] Step S1, start the test; after the test personnel and test subjects are ready, proceed to step S1 to start the test;

[0052] Step S2, fixing the power battery: fixing the power battery on the moving slide by a clamp;

[0053] Step S3, fixing the barrier: fixing the barrier on the barrier mounting platform by a clamp;

[0054] Step S4, closing the test box; if the test box is not closed, the test cannot be performed;

[0055] Step S5, perform a self-check of the equipment operation; put all parts of the test bench into working condition;

[0056] Step S6, setting the test conditions; adjusting the temperature, humidity and air pressure, and keeping the power battery in the environment for a specified time, then turning on the programmable electronic load, and keeping the power battery in a working state for a specified time;

[0057] Step S7, setting test parameters; setting the moving slide speed and high-speed camera and lighting system parameters to ensure that the external sensor (such as an acceleration sensor) is in a normal acquisition state;

[0058] Step S8, start the test;

[0059] Step S9, downloading test data; downloading the test data and storing it in a central data server;

[0060] Step S10, determine whether the conditions for opening the test box are met; observe the power battery for 2 hours to determine whether there is an abnormal temperature rise or combustion risk. If there is an abnormal temperature rise or combustion risk within 2 hours, the system starts risk prevention measures and enters step S11 after eliminating the risk; if there is no abnormal temperature rise or combustion risk within 2 hours, the test box can be opened and enter step S11;

[0061] Step S11, arranging the test equipment; opening the test box, disassembling the power battery and placing it in an observation room for 24 hours, and arranging the test equipment;

[0062] Go to step S12 and end the test.

[0063] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A new energy vehicle power battery scraping bottom collision test bench, characterized by: It consists of a drive system, a mobile slide, a programmable electronic load, a temperature control system, a humidity control system, a charging and ventilation system, an inert gas filler, a barrier installation table installed in the test chamber, a scraped bottom barrier, a high-speed camera, a lighting system, an alarm, a toxic gas detector, an infrared temperature detector, a state monitoring system, a test control system and a central data server; The power battery of the test object is fixedly installed on the mobile slide, and the drive system can drive the mobile slide to move left and right. The test control system communicates with the drive system through CAN and adjusts the drive system to make the mobile slide move at the set speed; The programmable electronic load can provide working resistance for the power battery, which is used to simulate the discharge environment of the power battery during vehicle driving; the temperature regulation system and the dry and wet regulation system are used to regulate the temperature and humidity in the test chamber; the charging and ventilation system is used to regulate the gas pressure in the test chamber; the test control system communicates with the programmable electronic load, the temperature regulation system and the dry and wet regulation system through CAN; The state monitoring system communicates with the toxic gas detector, the infrared temperature detector and the alarm through Ethernet. The state monitoring system is used to determine the abnormal temperature rise or combustion risk of the power battery after the test; when the state monitoring system determines that the power battery has an abnormal temperature rise or a combustion risk through the toxic gas detector and the infrared temperature detector, it will send a command to the alarm to make it sound an alarm; The inert gas filler can fill the test chamber with inert gas; when the state monitoring system determines that the power battery has an abnormal temperature rise or combustion risk, it will transmit a signal to the test control system via Ethernet, and the test control system will send a command to the inert gas filler via CAN, and the inert gas filler will work to prevent the power battery from burning; The high-speed camera is used to record the collision process and communicate with the status monitoring system; the lighting system provides lighting for the two high-speed cameras, and the status monitoring system communicates with the lighting system via a wireless network; the central data server is used to store and process the test process data, and the status monitoring system sends the data files to the central data server via Ethernet.

2. A new energy vehicle power battery bottom scraping collision test bench according to claim 1, characterized in that: The driving system drives the movable slide table to move left and right through the lead screw thread.

3. A new energy vehicle power battery bottom scraping collision test bench according to claim 1, characterized in that: The test bench has a temperature adjustment range of -60-60°C and a humidity adjustment range of 5%-90%.

4. A new energy vehicle power battery bottom scraping collision test bench according to claim 1, characterized in that: The pressure adjustment range of the test bench is 77-103KPa. When the power battery explodes or catches fire due to test damage and produces toxic gases, the toxic gases are stored in container tanks through the ventilation system to be discharged after corresponding chemical treatment.

5. A new energy vehicle power battery bottom scraping collision test bench according to claim 1, characterized in that: The toxic gas detector is used to monitor the toxic gas released after the power battery is burned; the infrared temperature detector is used to monitor the temperature change on the surface of the power battery; the alarm warns the test operator through sound and light changes.

6. A new energy vehicle power battery bottom scraping collision test bench according to claim 1, characterized in that: Adjust the installation height of the scraping barrier according to the size of the power battery, fix it on the mounting platform, and make the power battery collide with the scraping barrier by adjusting the movement of the movable slide to simulate the scraping collision condition of new energy vehicles.

7. A new energy vehicle power battery bottom scraping collision test bench according to claim 1, characterized in that: There are two high-speed cameras, which are aimed at the collision contact position at two angles to record the collision process. The status monitoring system maintains communication with the two high-speed cameras via Ethernet.

8. The new energy vehicle power battery bottom scraping collision test bench according to claim 1 is characterized by: The test bench supports the arrangement of acceleration sensors at key locations on the surface of the power battery as needed to analyze the structural characteristics of the power battery.

9. A method for scraping bottom collision test of power battery of new energy vehicle, characterized in that: The following steps are involved: Step S1, start the test; after the test personnel and test subjects are ready, proceed to step S1 to start the test; Step S2, fixing the power battery: fixing the power battery on the moving slide by a clamp; Step S3, fixing the barrier: fixing the barrier on the barrier mounting platform by a clamp; Step S4, closing the test box; if the test box is not closed, the test cannot be performed; Step S5, perform a self-check of the equipment operation; put all parts of the test bench into working condition; Step S6, setting the test conditions; adjusting the temperature, humidity and air pressure, and keeping the power battery in the environment for a specified time, then turning on the programmable electronic load, and keeping the power battery in a working state for a specified time; Step S7, setting test parameters; Set the speed of the mobile slide, high-speed camera and lighting system parameters to ensure that the external sensor acquisition status is normal; Step S8, start the test; Step S9, downloading test data; downloading the test data and storing it in a central data server; Step S10, determine whether the conditions for opening the test box are met; observe the power battery for 2 hours to determine whether there is an abnormal temperature rise or combustion risk. If there is an abnormal temperature rise or combustion risk within 2 hours, the system starts risk prevention measures and enters step S11 after eliminating the risk; if there is no abnormal temperature rise or combustion risk within 2 hours, the test box can be opened and enter step S11; Step S11, arranging the test equipment; opening the test box, disassembling the power battery and placing it in an observation room for 24 hours, and arranging the test equipment; Go to step S12 and end the test.

10. A new energy vehicle power battery scraping bottom collision test method according to claim 9, characterized in that: Step S7: the external sensor is an acceleration sensor.

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