Bottom ball strike test equipment for battery pack

Abstract

The utility model relates to battery pack bottom ball strike test equipment, which comprises a device bottom plate, a first fixing plate, a second fixing plate, a ball strike test device, a ball strike test device and a ball strike test device, the ball strike test mechanism is arranged between the first fixing plate and the second fixing plate, the ball strike test mechanism comprises a rotating rod, the rotating rod is located between the first fixing plate and the second fixing plate, the two connecting ropes are wound on the surface of the rotating rod in the forward direction and the reverse direction respectively, and in other words, two test balls of different sizes are arranged on the surface of the rotating rod in the forward direction and the reverse direction. The two test balls are arranged on the two sides of the rotating rod respectively, the two test balls of different sizes can be driven to move downwards by controlling forward and reverse rotation of the motor, ball strike tests of the two test balls of different sizes are carried out respectively, and the efficiency of the ball strike tests is improved. The pressure of the ball strike test can be detected in the ball strike test process of the test ball, so that a worker can conveniently know the data of the pressure each time.

Description

Technical Field

[0001] The utility model relates to the field of battery pack testing, in particular to a battery pack bottom ball impact testing device. Background Art

[0002] The increasing number of cars in China has made energy security issues increasingly serious. In order to reduce dependence on fossil fuels, new energy vehicles, especially electric vehicles, have been vigorously developed. For electric vehicles, there is a common problem of mileage. All electric vehicle companies are trying their best to increase the energy density of their battery packs so that they can have more battery power in the same battery pack installation space, thereby improving the endurance of the whole vehicle. The high energy density and high reliability of the battery pack are a pair of contradictions. Therefore, while pursuing high energy density, the reliability of the battery pack structure must be given enough attention. During the driving process of electric vehicles, the road conditions are complicated and the whole vehicle needs to meet certain rigidity, strength, durability, and NVH performance requirements. As one of the important components of electric vehicles, the battery pack is also subjected to various harsh working conditions. For this reason, the country has set strict safety requirements and corresponding testing methods for battery packs for electric vehicles. The national standard test items can already better detect whether the battery pack structural design is reliable, but there is still no corresponding test standard for the bottoming conditions that electric vehicles may encounter during driving (the so-called bottoming refers to the vehicle chassis hitting the ground or protrusions on the ground during driving, and flying stones hitting the bottom are also considered bottoming), causing many companies to ignore the importance of battery pack bottom protection.

[0003] According to the published patent 202222927899.4, a battery pack bottom ball impact test device comprises a bottom plate, a mounting frame and a side plate, wherein a placement slot for placing the battery pack is provided on the left side of the top of the bottom plate; a mounting frame is provided on the top of the bottom plate above the placement slot, a connecting block is provided in the middle of the bottom wall at the top of the mounting frame, a directional wheel is provided at the bottom of the connecting block, a fixing frame is provided on the top of the bottom plate on the right side of the mounting frame, and an electric telescopic rod is provided on the rear side wall of the fixing frame; in the utility model, the battery pack to be tested is placed in the placement slot with the bottom facing upward, the output shaft of the electric telescopic rod is first extended, and then the other end of the wire rope is passed through the upper surface of the output shaft of the electric telescopic rod and the upper surface of the directional wheel so that the impact ball is suspended above the battery pack at this time, and after the side door is closed, the electric telescopic rod is started, and after the output end of the electric telescopic rod is shortened, the impact ball falls to perform a ball impact test on the battery pack at the bottom. In the process of realizing the utility model, the inventor found that there is at least one method in the prior art that The following problem has not been solved. Although a hanging ring is set on the top of the impact ball, and one end of the wire rope is connected to the hanging ring through a hook, the impact balls of different weights can be replaced according to the needs, so as to adjust the impact force of the impact ball when it falls, and increase the practicality of the test. It solves the problem that there is still no corresponding test standard for the bottoming conditions that electric vehicles may encounter during driving (the so-called bottoming refers to the car chassis hitting the ground or ground protrusions during driving, and the splashing stones hitting the bottom are also classified as bottoming), which leads to many companies ignoring the importance of battery pack bottom protection. However, during use, the traditional battery pack bottom ball impact test equipment uses a single test ball to perform a ball impact test on the battery pack. When different test balls need to be replaced, the test ball needs to be repeatedly disassembled and assembled, which is not very convenient. Moreover, even if multiple test balls are set up side by side for ball impact tests, due to the different sizes of the multiple test balls, the distances at which the test balls hit the battery pack are also different, which will affect the impact test of the small test balls. For this reason, it is necessary to design a new technical solution to solve it. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art, meet the actual needs, and provide a battery pack bottom ball impact test device to solve the problem that the current traditional battery pack bottom ball impact test device uses a single test ball to perform a ball impact test on the battery pack. When a different test ball needs to be replaced, the test ball needs to be repeatedly disassembled and assembled, which is not very convenient. Moreover, even if multiple test balls are arranged side by side for the ball impact test, due to the different sizes of the multiple test balls, the distances at which the test balls hit the battery pack are also different, which will affect the technical problems of the small test ball impact test.

[0005] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is: design a battery pack bottom ball impact test device, including a device bottom plate, and also including:

[0006] A first fixing plate and a second fixing plate are fixed to one side of the top of the bottom plate of the device;

[0007] A ball hitting test mechanism is disposed between the first fixing plate and the second fixing plate, and the ball hitting test mechanism includes a rotating rod, and the rotating rod is located between the first fixing plate and the second fixing plate;

[0008] One end of the first connecting rope is fixedly wrapped around the outer rear end of the rotating rod in a forward direction, and a small test ball is fixedly attached to the other end of the first connecting rope. One end of the second connecting rope is fixedly wrapped around the outer front end of the rotating rod in a reverse direction, and a large test ball is fixedly attached to the other end of the second connecting rope.

[0009] Preferably, a motor shaft is fixed to the front end of the rotating rod, the front end of the motor shaft passes through the second fixed plate and is connected to the motor, the rear end of the motor is installed with the second fixed plate, the rear end of the rotating rod is rotatably connected with a bearing, and the rear end of the bearing is installed with the first fixed plate.

[0010] Preferably, the bottom of the small test ball and the large test ball are both provided with a circular groove, and a pressure sensor is installed inside the circular groove.

[0011] Preferably, a groove body is provided on one side of both front and rear ends of the top of the device bottom plate, a battery placement shell is placed inside the groove body, and a plurality of battery placement slots are provided on the top of the battery placement shell.

[0012] Preferably, electric telescopic cylinders are installed at both front and rear ends of one side of the device bottom plate, and one side of the electric telescopic cylinder passes through the device bottom plate and extends into the battery placement groove, and a battery placement shell is fixed to one end of the electric telescopic cylinder located in the battery placement groove.

[0013] Preferably, an industrial control computer is installed at the front end of the device bottom plate, and the industrial control computer is connected to the pressure sensor signal.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model combines a rotating rod, a connecting rope and a test ball to respectively wind the two connecting ropes forwardly and reversely around the surface of the rotating rod. That is to say, two test balls of different sizes are respectively located on both sides of the rotating rod. By controlling the forward and reverse rotation of the motor, the two test balls of different sizes can be driven downward respectively to perform ball hitting tests on the two test balls of different sizes, thereby improving the efficiency of the ball hitting test. Moreover, a pressure sensor is provided at the bottom of the test ball, which can detect the pressure of the ball hitting test during the ball hitting test of the test ball, so that the staff can understand the data of each pressure, thereby solving the problem of traditional ball hitting test equipment at the bottom of the battery pack, which uses a single test ball to perform a ball hitting test on the battery pack. When a different test ball needs to be replaced, the test ball needs to be repeatedly disassembled and assembled, which is not very convenient. Moreover, even if a plurality of test balls are arranged side by side for the ball hitting test, due to the different sizes of the plurality of test balls, the distances at which the test balls hit the battery pack are also different, which will affect the technical problem of the small test ball impact test.

[0016] 2. The utility model can place multiple battery packs into the battery placement slot through the combination of the battery placement shell, the battery placement slot and the electric telescopic cylinder. When conducting a ball impact test, the battery placement shell can be pushed by the electric telescopic cylinder to make the battery packs in different positions pass through the bottom of the test ball respectively, and the ball impact test can be continuously performed on multiple battery packs, thereby improving the efficiency of the ball impact test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the bottom structure of the test ball of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the battery housing of the utility model.

[0020] In the figure: 1. device base plate; 101. industrial computer; 2. first fixed plate; 201. second fixed plate; 202. motor; 203. motor shaft; 204. rotating rod; 205. bearing; 206. first connecting rope; 207. second connecting rope; 208. small test ball; 209. large test ball; 210. circular groove; 211. pressure sensor; 3. groove body; 301. battery placement shell; 302. battery placement groove; 303. electric telescopic cylinder. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Example 1: A battery pack bottom ball impact test device, see Figures 1 to 3, including a device bottom plate 1, and also including: a first fixed plate 2 and a second fixed plate 201, fixed to one side of the top of the device bottom plate 1; a ball hitting test mechanism, arranged between the first fixed plate 2 and the second fixed plate 201, the ball hitting test mechanism includes a rotating rod 204, the rotating rod 204 is located between the first fixed plate 2 and the second fixed plate 201; the outer rear end of the rotating rod 204 is forwardly wound and fixed with one end of a first connecting rope 206, and the other end of the first connecting rope 206 is fixed with a small test ball 208, and the outer front end of the rotating rod 204 is reversely wound and fixed with one end of a second connecting rope 207, and the other end of the second connecting rope 207 is fixed with a large test ball 209. First, place multiple battery packs with their bottoms facing up in the battery placement slot 302 in the battery placement shell 301, and then turn on the motor 202 to rotate forward, the motor 202 drives the motor shaft 203, the motor shaft 203 drives the rotating rod 204, and the rotating rod 204 will drive the first connecting rope 207 that is wound forward The connecting rope 206 is released downward, and the first connecting rope 206 will drive the small test ball 208 to hit the battery pack at the bottom, thereby realizing a ball hitting test on the battery pack. When the large test ball 209 is needed to perform a ball hitting test, the motor 202 can be turned on to rotate in the opposite direction, and the rotating rod 204 will drive the reversely wound second connecting rope 207 to be released downward, and the second connecting rope 207 will drive the large test ball 209 to hit another battery pack at the bottom, thereby realizing a ball hitting test on another battery pack. The efficiency of the ball hitting test is improved, and the problem of traditional battery pack bottom ball hitting test equipment, which uses a single test ball to perform a ball hitting test on the battery pack, requires repeated disassembly and assembly of the test ball when a different test ball needs to be replaced, is not very convenient, and even if a plurality of test balls are arranged side by side for the ball hitting test, due to the different sizes of the plurality of test balls, the distances at which the test balls hit the battery pack are also different, which will affect the technical problem of the impact test of the small test ball 208.

[0023] For details, see Figure 1 The front end of the rotating rod 204 is fixed with a motor shaft 203, the front end of the motor shaft 203 passes through the second fixed plate 201 and is connected to the motor 202, the rear end of the motor 202 is installed with the second fixed plate 201, the rear end of the rotating rod 204 is rotatably connected with a bearing 205, and the rear end of the bearing 205 is installed with the first fixed plate 2.

[0024] For further information, see Figure 2 A circular groove 210 is provided at the bottom of the small test ball 208 and the large test ball 209, and a pressure sensor 211 is installed inside the circular groove 210. The pressure sensor 211 is provided at the bottom of the test ball, which can detect the pressure of the ball hitting test during the ball hitting test of the test ball, so that the staff can understand the pressure data of each time.

[0025] It is worth noting that see Figure 1A slot body 3 is provided at one side of both front and rear ends of the top of the device bottom plate 1 , a battery placement shell 301 is placed inside the slot body 3 , and a plurality of battery placement slots 302 are provided at the top of the battery placement shell 301 .

[0026] It is worth noting that see Figure 3 Electric telescopic cylinders 303 are installed at both front and rear ends of one side of the device bottom plate 1, and one side of the electric telescopic cylinder 303 passes through the device bottom plate 1 and extends into the battery placement groove 302. A battery placement shell 301 is fixed to one end of the electric telescopic cylinder 303 located in the battery placement groove 302. After multiple battery packs are placed in the battery placement groove 302, when performing a ball hitting test, the electric telescopic cylinder 303 can be opened to push the battery placement shell 301 in the groove body 3, so that battery packs at different positions pass through the bottom of the test ball respectively, thereby continuously performing ball hitting tests on multiple battery packs, thereby improving the efficiency of the ball hitting test.

[0027] It is worth mentioning that see Figure 1 An industrial computer 101 is installed at the front end of the device base plate 1, and the industrial computer 101 is connected to the pressure sensor 211 by signal.

[0028] When using a battery pack bottom ball impact test device, first place multiple battery packs with their bottoms facing up in the battery placement slots 302 in the battery placement shell 301, then turn on the motor 202 for forward rotation, the motor 202 drives the motor shaft 203, the motor shaft 203 drives the rotating rod 204, the rotating rod 204 drives the first connecting rope 206 that is wound forwardly to be released downward, the first connecting rope 206 drives the small test ball 208 to hit the battery pack at the bottom, and realizes the ball impact test on the battery pack. When it is necessary to use the large test ball 209 to perform the ball impact test, the motor 202 can be turned on for reverse rotation, the rotating rod 204 drives the second connecting rope 207 that is wound in the reverse direction to be released downward, and the second connecting rope 208 drives the second connecting rope 207 that is wound in the reverse direction to be released downward. The connecting rope 207 will drive the large test ball 209 to collide with another battery pack at the bottom, thereby realizing a ball hitting test on another battery pack and improving the efficiency of the ball hitting test. A pressure sensor 211 is provided at the bottom of the test ball, which can detect the pressure of the ball hitting test during the ball hitting test of the test ball, so that the staff can understand the data of each pressure. After placing multiple battery packs into the battery placement slot 302, when performing the ball hitting test, the electric telescopic cylinder 303 can be opened to push the battery placement shell 301 in the slot body 3, so that the battery packs at different positions pass through the bottom of the test ball respectively, thereby continuously performing ball hitting tests on multiple battery packs and improving the efficiency of the ball hitting test.

[0029] In addition, the components designed in the present invention are all universal standard parts or components known to technical personnel in the field. Their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. They can be fully implemented by technical personnel in the field, and there is no need to elaborate. The content protected by the present invention does not involve improvements to internal structures and methods.

[0030] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A battery pack bottom ball impact test device, comprising a device bottom plate (1), characterized in that: Also includes: A first fixing plate (2) and a second fixing plate (201) are fixed to one side of the top of the device bottom plate (1); A ball striking test mechanism is arranged between a first fixing plate (2) and a second fixing plate (201), the ball striking test mechanism comprising a rotating rod (204), the rotating rod (204) being located between the first fixing plate (2) and the second fixing plate (201); One end of a first connecting rope (206) is fixedly wound around the outer rear end of the rotating rod (204) in a forward direction, and a small test ball (208) is fixedly wound around the other end of the first connecting rope (206). One end of a second connecting rope (207) is fixedly wound around the outer front end of the rotating rod (204) in a reverse direction, and a large test ball (209) is fixedly wound around the other end of the second connecting rope (207).

2. A battery pack bottom ball impact test device as claimed in claim 1, characterized in that: A motor shaft (203) is fixed to the front end of the rotating rod (204); the front end of the motor shaft (203) passes through the second fixing plate (201) and is connected to the motor (202); the rear end of the motor (202) is mounted with the second fixing plate (201); the rear end of the rotating rod (204) is rotatably connected with a bearing (205); the rear end of the bearing (205) is mounted with the first fixing plate (2).

3. A battery pack bottom ball impact test device as claimed in claim 1, characterized in that: The bottom of the small test ball (208) and the large test ball (209) are both provided with a circular groove (210), and a pressure sensor (211) is installed inside the circular groove (210).

4. A battery pack bottom ball impact test device as claimed in claim 1, characterized in that: A groove body (3) is provided on one side of both front and rear ends of the top of the device bottom plate (1), a battery placement shell (301) is placed inside the groove body (3), and a plurality of battery placement slots (302) are provided on the top of the battery placement shell (301).

5. A battery pack bottom ball impact test device as claimed in claim 4, characterized in that: Electric telescopic cylinders (303) are installed at both front and rear ends of one side of the device bottom plate (1), and one side of the electric telescopic cylinder (303) passes through the device bottom plate (1) and extends into the battery placement groove (302), and a battery placement housing (301) is fixed to one end of the electric telescopic cylinder (303) located in the battery placement groove (302).

6. A battery pack bottom ball impact test device as claimed in claim 3, characterized in that: An industrial control computer (101) is installed at the front end of the device bottom plate (1), and the industrial control computer (101) is signal-connected to the pressure sensor (211).

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