Battery pack bottom impact test device

Abstract

The utility model relates to the technical field of impact testing devices, and discloses a battery pack bottom impact testing device, which comprises a testing machine main body, and a sleeve shell and a placement box fixedly communicated with the sleeve shell are fixedly arranged on the testing machine main body. A battery pack is placed in the placement box; an impact mechanism capable of adjusting impact is arranged in the sleeve shell, and the impact mechanism is used for impacting the battery pack; the sleeve shell is provided with a limiting piece used for limiting the position of the impact mechanism after impact. According to the battery pack bottom impact testing device provided by the utility model, the impact mechanism and the limiting piece are matched for use, so that the stability after impact is facilitated, and the detection result is increased.

Description

Technical Field

[0001] This utility model relates to the field of impact testing devices, and in particular to a battery pack bottom impact testing device. Background Technology

[0002] Because the battery pack located at the bottom of the car is frequently subjected to external forces such as bumps, scrapes, and stone impacts during vehicle operation, it is necessary to conduct destructive testing on the bottom of the battery pack during the battery pack development process.

[0003] Currently, some battery packs are taken for bottom damage tests. The battery packs are usually relatively flat and are placed directly in the testing machine to be subjected to impact testing. Directly releasing an impact object to hit the battery pack will cause it to bounce back after the impact and be impacted again, reducing the accuracy of the test.

[0004] To address the aforementioned issues, this application proposes a battery pack bottom impact testing device. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a battery pack bottom impact testing device. This utility model uses the combined use of an impact mechanism and a limiting component to facilitate stability after impact and improve test results.

[0007] (II) Technical Solution

[0008] To solve the above problems, this utility model provides a battery pack bottom impact testing device, including a testing machine body, on which a housing and a placement box fixedly connected to the housing are fixedly installed;

[0009] The battery pack is placed inside the placement box;

[0010] The casing is equipped with an adjustable impact mechanism for impacting the battery pack.

[0011] The housing is provided with a limiting component for limiting the position of the impact mechanism after impact.

[0012] Preferably, the impact mechanism includes an electromagnet, a movable plate, a pressure sensor, a punch, and a magnetic block. The movable plate is slidably sleeved inside the housing. The punch is connected to the movable plate through the pressure sensor. The magnetic block is embedded inside the movable plate. The electromagnet is fixedly installed at the top inside the housing and acts on the magnetic block.

[0013] Preferably, the housing is connected to a one-way exhaust valve, and a pressure sensor is installed inside the housing.

[0014] Preferably, the limiting component includes a positioning pin and a spring. The insertion end of the positioning pin slides into the interior of the housing and the movable plate. The spring is movably sleeved on the outer periphery of the positioning pin. One end of the spring is fixedly connected to the housing, and the other end of the spring is connected to the T-shaped end of the positioning pin. The insertion end of the positioning pin is self-adaptively connected to the electromagnet.

[0015] Preferably, the side of the movable plate is provided with an inclined groove that is adapted to the insertion end of the positioning pin.

[0016] Preferably, a support plate is placed inside the housing, and a driving component for adjusting the position of the support plate is fixedly installed on the housing.

[0017] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0018] The battery pack is placed on the support plate, and the drive unit moves the support plate upward so that the battery pack comes into close contact with the bottom of the casing. The electromagnet is activated to generate magnetism, which acts on the magnetic block, giving the punch an initial velocity. The punch moves downward to impact the battery pack. The downward movement of the punch causes the moving plate to move downward, allowing air inside the casing to be discharged through the one-way exhaust valve. As the moving plate moves downward, the space between the moving plate and the top of the battery pack decreases. The impact force of the punch on the battery pack is displayed by the pressure sensor. As the moving plate continues to move downward, the positioning pin moves into the interior of the casing, thus limiting the position of the moving plate after its movement and reducing the rebound of the battery pack after impact. After the moving plate moves to the bottom of the casing, the space is smaller, allowing the air pressure sensor to detect the battery pack leakage in time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a battery pack bottom impact testing device proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of part of the internal structure of a battery pack bottom impact testing device proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the limiting member acting on the moving plate in the battery pack bottom impact testing device proposed in this utility model.

[0022] Reference numerals in the attached drawings: 1. Main body of the testing machine; 2. Housing; 3. Placement box; 4. Battery pack; 5. Impact mechanism; 51. Electromagnet; 52. Moving plate; 53. Pressure sensor; 54. Punch; 55. Magnetic block; 56. One-way exhaust valve; 57. Air pressure sensor; 6. Limiting component; 61. Positioning pin; 62. Spring; 7. Support plate; 8. Driving component. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0024] like Figure 1-3 As shown, the present invention proposes a battery pack bottom impact testing device, which includes a testing machine body 1, characterized in that: a housing 2 and a placement box 3 fixedly connected to the housing 2 are fixedly installed on the testing machine body 1;

[0025] The battery pack 4 is placed inside the placement box 3;

[0026] The casing 2 is equipped with an adjustable impact mechanism 5, which is used to impact the battery pack 4. The impact mechanism 5 includes an electromagnet 51, a movable plate 52, a pressure sensor 53, a punch 54, and a magnetic block 55. The movable plate 52 is slidably sleeved inside the casing 2. The punch 54 is connected to the movable plate 52 through the pressure sensor 53. The magnetic block 55 is embedded inside the movable plate 52. The electromagnet 51 is fixedly installed at the top inside the casing 2 and acts on the magnetic block 55.

[0027] The housing 2 is connected to a one-way exhaust valve 56, and the housing 2 is equipped with a pressure sensor 57.

[0028] The housing 2 is provided with a limiting member 6 for limiting the position of the impact mechanism 5 after impact. Specifically, the limiting member 6 includes a positioning pin 61 and a spring 62. The insertion end of the positioning pin 61 slides into the interior of the housing 2 and the moving plate 52. The spring 62 is movably sleeved on the outer periphery of the positioning pin 61. One end of the spring 62 is fixedly connected to the housing 2, and the other end of the spring 62 is connected to the T-shaped end of the positioning pin 61. The insertion end of the positioning pin 61 is self-adaptively connected to the electromagnet 51. The side of the moving plate 52 is provided with a slanted groove 521 that is adapted to the insertion end of the positioning pin 61. There are multiple grooves 521, which prevent the positioning pin 61 from moving back after insertion.

[0029] In order to adjust the position of the battery pack 4, a support plate 7 is placed inside the housing 2, and a drive component 8 for adjusting the position of the support plate 7 is fixedly installed on the housing 2.

[0030] In this invention, the battery pack 4 is placed on the support plate 7, and the driving component 8 drives the support plate 7 to move upward so that the battery pack 4 comes into close contact with the bottom of the casing 2. The electromagnet 51 is activated to generate magnetism that acts on the magnetic block 55, thereby giving the punch 54 an initial velocity, causing the punch 54 to move downward and impact the battery pack 4. The downward movement of the punch 54 drives the moving plate 52 to move downward, so that the air inside the casing 2 is discharged through the one-way exhaust valve 56. As the moving plate 52 moves downward, the space between the moving plate 52 and the top of the battery pack 4 becomes smaller. The punch 54 impacts the battery pack 4, and the pressure sensor 53 displays the impact force. As the moving plate 52 continues to move downward, under the action of 521, the positioning pin 61 self-adapts into the interior of 521, thereby limiting the position of the moving plate 52 after it moves, reducing the rebound of the battery pack 4 after the impact. After the moving plate 52 moves to the bottom of the casing 2, the space is smaller, so that the air pressure sensor 57 can detect the leakage of the battery pack 4 in time.

[0031] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A battery pack bottom impact testing device, comprising a testing machine body (1), characterized in that: The main body (1) of the test machine is fixedly installed with a housing (2) and a placement box (3) fixedly connected to the housing (2); The battery pack (4) is placed inside the placement box (3); The casing (2) is provided with an adjustable impact mechanism (5) inside, which is used to impact the battery pack (4); The housing (2) is provided with a limiting member (6) for limiting the position of the impact mechanism (5) after impact.

2. The battery pack bottom impact testing device according to claim 1, characterized in that, The impact mechanism (5) includes an electromagnet (51), a movable plate (52), a pressure sensor (53), a punch (54), and a magnetic block (55). The movable plate (52) is slidably sleeved inside the housing (2). The punch (54) is connected to the movable plate (52) through the pressure sensor (53). The magnetic block (55) is embedded inside the movable plate (52). The electromagnet (51) is fixedly installed on the top inside the housing (2) and acts on the magnetic block (55).

3. The battery pack bottom impact testing device according to claim 2, characterized in that, The housing (2) is connected to a one-way exhaust valve (56), and the housing (2) is equipped with a pressure sensor (57).

4. The battery pack bottom impact testing device according to claim 3, characterized in that, The limiting component (6) includes a positioning pin (61) and a spring (62). The insertion end of the positioning pin (61) slides into the interior of the housing (2) and the moving plate (52). The spring (62) is movably sleeved on the outer periphery of the positioning pin (61). One end of the spring (62) is fixedly connected to the housing (2), and the other end of the spring (62) is connected to the T-shaped end of the positioning pin (61). The insertion end of the positioning pin (61) is self-adaptively connected to the electromagnet (51).

5. The battery pack bottom impact testing device according to claim 4, characterized in that, The side of the movable plate (52) is provided with a slanted groove (521) that is adapted to the insertion end of the positioning pin (61).

6. A battery pack bottom impact testing device according to any one of claims 1-5, characterized in that, The housing (2) contains a support plate (7), and a drive component (8) for adjusting the position of the support plate (7) is fixedly installed on the housing (2).

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