Search

EP-4682506-B1 - BOTTOM GUARD PLATE TESTING DEVICE FOR BATTERY PACK

EP4682506B1EP 4682506 B1EP4682506 B1EP 4682506B1EP-4682506-B1

Inventors

  • HUANG, Shenhua

Dates

Publication Date
20260513
Application Date
20250211

Claims (13)

  1. A bottom guard plate testing device for a battery pack, comprising: a pedestal (100) configured to place a bottom guard plate (300), wherein the pedestal (100) is provided with a measuring recess (110), a pressure sensor (400) or a plastically deformable member (500) is arranged in the measuring recess ( 110), a cushion block (600) is arranged on the pedestal (100), the bottom guard plate (300) and the pedestal (100) are spaced apart by the cushion block (600) to form an impact cavity, and the measuring recess (110) is located in the impact cavity; and a test mechanism (200) comprising a test bracket (210) and an impact assembly (220), wherein the test bracket (210) and the impact assembly (220) are arranged on a side of the pedestal (100), the impact assembly (220) is suspended on the test bracket (210), and the impact assembly (220) is located directly above the pedestal (100).
  2. The bottom guard plate testing device for a battery pack according to claim 1, wherein the test mechanism (200) further comprises a base (230), the base (230) is arranged on another side of the pedestal (100), and the test bracket (210) is detachably mounted on the base (230).
  3. The bottom guard plate testing device for a battery pack according to claim 2, wherein the test bracket (210) comprises a vertical support rod (211) and a horizontal support rod (212) connected to each other, the impact assembly (220) is connected to the horizontal support rod (212), the horizontal support rod (212) is connected to the vertical support rod (211), and an end of the vertical support rod (211) facing away from the horizontal support rod (212) is connected to the base (230).
  4. The bottom guard plate testing device for a battery pack according to claim 3, wherein the test bracket (210) comprises two vertical support rods (211), and two ends of the horizontal support rod (212) are connected to the two vertical support rods (211) respectively, and the test bracket (210) is a door-shaped structure.
  5. The bottom guard plate testing device for a battery pack according to claim 3, wherein the test bracket (210) comprises one vertical support rod (211), an end of the horizontal support rod (212) is connected to the vertical support rod (211), and the test bracket (210) is a r-shaped structure.
  6. The bottom guard plate testing device for a battery pack according to claim 3, wherein the test bracket (210) comprises one vertical support rod (211), the horizontal support rod (212) is configured to be bent into an arc-shaped structure, and two ends of the horizontal support rod (212) are connected to the vertical support rod (211) and are located at a same horizontal level.
  7. The bottom guard plate testing device for a battery pack according to any one of claims 3 to 6, wherein the vertical support rod (211) comprises a fixed bar (211a) and a movable bar (211b), the fixed bar (211a) is fixedly connected to the base (230), an end of the movable bar (211b) is telescopically connected to the fixed bar (211a), and another end of the movable bar (211b) is fixedly connected to the horizontal support rod (212).
  8. The bottom guard plate testing device for a battery pack according to any one of claims 1 to 7, wherein the impact assembly (220) comprises an impact carrier (221) and an impact head (222), the impact head (222) is inserted through the impact carrier (221) in a direction toward the pedestal (100), and the impact head (222) is provided with a hemispherical, conical or truncated cone-shaped impact part (2221) on a side facing the pedestal (100).
  9. The bottom guard plate testing device for a battery pack according to any one of claims 1 to 8, wherein the test bracket (210) is provided with a pulley (213), and the impact assembly (220) is connected to the pulley (213) through a connecting rope (214) to be suspended on the test bracket (210).
  10. The bottom guard plate testing device for a battery pack according to any one of claims 1 to 9, wherein the pressure sensor (400) is placed in the measuring recess (110) and is spaced apart from the bottom guard plate (300), and an end surface of the pressure sensor (400) facing the bottom guard plate (300) is flush with an end surface of the pedestal (100) facing the bottom guard plate (300).
  11. The bottom guard plate testing device for a battery pack according to any one of claims 1 to 10, wherein the pedestal (100) is provided with a wire slot (120), an end of the wire slot (120) is in communication with the measuring recess (110), and another end of the wire slot (120) extends through one side edge of the pedestal (100).
  12. The bottom guard plate testing device for a battery pack according to any one of claims 1 to 9, wherein the plastically deformable member (500) is filled in the measuring recess (110) and is spaced apart from the bottom guard plate (300), and an end surface of the plastically deformable member (500) facing the bottom guard plate (300) is flush with an end surface of the pedestal (100) facing the bottom guard plate (300).
  13. The bottom guard plate testing device for a battery pack according to any one of claims 1 to 12, wherein the pedestal (100) is detachably connected to the cushion block (600), the pedestal (100) is provided with a plurality of first mounting holes (130), the cushion block (600) is provided with a plurality of second mounting holes (610) corresponding to the first mounting holes (130), and the bottom guard plate (300) is provided with third mounting holes (310) corresponding to the first mounting holes (130) and the second mounting holes (610) respectively.

Description

TECHNICAL FIELD The present application relates to the technical field of battery pack testing equipment, for example, to a bottom guard plate testing device for a battery pack. BACKGROUND With the rapid development of the new energy battery industry, the safety requirements for batteries are becoming increasingly higher. In the long-term use of an electric vehicle battery pack, the physical strength and anti-collision impact strength of the battery pack are becoming increasingly important. There have been a large number of new energy vehicles on the market that have caused battery pack fires due to bottoming, which seriously threatens the life and property safety of drivers and passengers. Therefore, the strength of the bottom guard plate of the battery pack is particularly important. CN219495616U discloses a battery pack impact test device for an electric automobile, which has an impact head set at a bottom of separating mechanism, wherein a lower part of impact test frame is provided with the battery pack, and the impact head performs an impact test on the battery pack. There is currently no national standard of bottom guard plate protection for new energy battery packs, and the main test is based on the overall standard of the battery pack. SUMMARY The overall test of the battery pack has a very high cost and a low efficiency, and the economic cost and time cost of the test are too high, so it is not suitable for large-scale material testing. Moreover, the overall test of the battery pack is difficult to reflect the impact resistance and deformation resistance of the bottom guard plate separately, which is not conducive to the preliminary design of the bottom guard plate of the battery pack. A bottom guard plate testing device for a battery pack according to the present application can realize testing for performances such as impact resistance and deformation resistance of the bottom guard plate and realize the quantification of design parameters and standards for the strength performance of the bottom guard plate. A bottom guard plate testing device for a battery pack is provided, which includes a pedestal and a test mechanism. The pedestal is configured to place a bottom guard plate, the pedestal is provided with a measuring recess, a pressure sensor or a plastically deformable member is arranged in the measuring recess, and a cushion block is arranged on the pedestal. The bottom guard plate and the pedestal are spaced apart by the cushion block to form an impact cavity, and the measuring recess is located in the impact cavity. The test mechanism includes a test bracket and an impact assembly, the test bracket and the impact assembly are arranged on one side of the pedestal, the impact assembly is suspended on the test bracket, and the impact assembly is located directly above the pedestal. Beneficial effects of the present application are as follows: in the bottom guard plate testing device for a battery pack according to the present application, by mounting the cushion block on the pedestal, and then placing the to-be-tested bottom guard plate on the cushion block, the bottom guard plate is spaced apart from the pedestal by the cushion block to form an impact cavity. Then, the impact assembly is lifted by the test bracket arranged on one side of the pedestal, and the impact assembly is located directly above the pedestal, that is, the impact assembly is located directly above the bottom guard plate, so that the impact assembly falls vertically from the test bracket to perform an impact collision test on the bottom guard plate. During the test, multiple to-be-tested bottom guard plates of uniform specifications are prepared, and the pressure sensor or the plastically deformable member is placed in the measuring recess of the pedestal, so as to measure the corresponding impact force value through the pressure sensor, and measure the deformation value of the bottom guard plate after the impact through the plastically deformable member, thus realizing data testing for the impact on the bottom guard plate, which is conducive to data quantification, and is convenient for designing the strength standard of the bottom guard plate of the corresponding battery pack according to the corresponding test data and convenient for selecting the bottom guard plate according to the corresponding test data, so as to ensure that the bottom guard plate can provide sufficient support and impact resistance for the battery pack in practical application, and ensure the safety of the battery pack in use. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural diagram of a bottom guard plate testing device for a battery pack according to an embodiment of the present application;FIG. 2 is a schematic structural diagram of a pedestal according to an embodiment of the present application;FIG. 3 is a schematic structural diagram of a bottom surface of a pedestal according to an embodiment of the present application;FIG.