Testing device for needling at bottom of battery pack

Abstract

The utility model relates to the technical field of battery pack testing, and discloses a testing device for needling at the bottom of a battery pack, which comprises a testing box and a testing chamber arranged in the testing box, a falling cylinder communicated with the test chamber is mounted on the test box; an electromagnetic adsorption part is mounted at the top of the falling cylinder, a cylindrical iron block is arranged at the bottom of the electromagnetic adsorption part, and the height of the cylindrical iron block is driven by the electromagnetic adsorption part to be adjusted; the cylindrical iron block has a first position state and a second position state, the cylindrical iron block is located in the first position state, and when the electromagnetic adsorption part is powered on, the cylindrical iron block is magnetically connected with the electromagnetic adsorption part. According to the testing device for needling at the bottom of the battery pack, the height of the cylindrical iron block is adjusted through the electromagnetic adsorption piece, and impact at different speeds can be simulated, so that the safety performance of the battery pack in an actual traffic accident can be evaluated more accurately.

Description

Technical Field

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

[0002] A battery pack, also known as a battery module, is a battery combination consisting of multiple lithium-ion single cells connected in parallel and series. It takes into account the mechanical strength, thermal management, and battery management system matching of the system. The core component of the battery pack is the cell. Currently, the mainstream cell shapes are divided into three categories: square shell, cylindrical, and soft pack. The battery pack mainly consists of battery modules, mechanical systems, electrical systems, and thermal management systems. The battery module is responsible for the storage and release of electrical energy, the electrical system is responsible for the transmission and control of electrical energy, and the thermal management system is responsible for maintaining the battery operating within an appropriate temperature range. During the production process of the battery pack, the bottom of the battery pack needs to be subjected to a needle penetration test. The purpose of the needle penetration test is mainly to evaluate the reaction and performance of the battery pack when punctured by a sharp object. By simulating abuse scenarios under extreme conditions, the safety performance of the battery pack can be effectively evaluated, providing reliable protection for the development of electric vehicles.

[0003] In the existing technology, the needle penetration test on the bottom of the battery pack mainly uses a cylinder to drive the needle to slowly penetrate the interior of the battery pack to observe whether the battery pack catches fire. However, this testing method has limitations and cannot simulate the situation where a sharp object penetrates the battery pack when it is hit at high speed, which affects the accuracy of the test.

[0004] To solve the above problems, this application proposes a testing device for acupuncture of the bottom of a battery pack. Utility Model Content

[0005] Based on the technical problems existing in the background technology, the utility model proposes a testing device for acupuncture of the bottom of a battery pack.

[0006] The utility model provides a battery pack bottom puncture test device, comprising a test box and a test chamber provided in the test box;

[0007] The test box is provided with a drop tube connected to the test chamber;

[0008] An electromagnetic adsorption component is installed on the top of the drop tube, and a columnar iron block is provided at the bottom of the electromagnetic adsorption component, and the height of the columnar iron block is driven and adjusted by the electromagnetic adsorption component;

[0009] The cylindrical iron block has a first position state and a second position state. When the cylindrical iron block is in the first position state, the electromagnetic adsorption member is energized and the cylindrical iron block is magnetically connected to the electromagnetic adsorption member. When the cylindrical iron block is in the second position state, the electromagnetic adsorption member is de-energized and the cylindrical iron block is separated from the electromagnetic adsorption member and falls in the drop tube.

[0010] A needle-piercing piece is installed at the bottom of the columnar iron block.

[0011] Preferably, the electromagnetic adsorption component includes a mounting frame, an assembly block, a cylinder and an electromagnet. The top of the drop tube is installed with an assembly block located above the drop tube through the mounting frame. The top of the assembly block is installed with a cylinder. The driving end of the cylinder is connected to the electromagnet. When the electromagnet is energized, the columnar iron block is magnetically connected to the electromagnet. When the electromagnet is de-energized, the columnar iron block is separated from the electromagnet.

[0012] Preferably, the piercing part includes a threaded shaft and a test needle installed on the threaded shaft, and the number of the threaded shaft and the test needle is several. The bottom of the cylindrical iron block is provided with several evenly distributed threaded holes. One of the threaded shafts is threadedly connected to the threaded hole located in the middle of the bottom surface of the cylindrical iron block. The test needle on one of the threaded shafts is facing the test box, and the remaining test needles are respectively inserted into the several threaded holes, and the threaded shafts on the remaining test needles are respectively threadedly connected to the several threaded holes.

[0013] Preferably, an assembly hole is provided on the top of the columnar iron block, and an elastic top piece is installed in the assembly hole to abut against the electromagnet.

[0014] Preferably, the elastic top piece includes a fixed tube, a spring and a top rod, the fixed tube is installed in the assembly hole, and the top of the fixed tube is flush with the top surface of the cylindrical iron block, an insertion cavity is opened in the fixed tube, and a spring is installed in the insertion cavity, and a top rod is provided on the fixed tube that is inserted into the insertion cavity and connected to the spring, and the top rod abuts against the bottom of the electromagnet.

[0015] Preferably, a nozzle for spraying water into the test chamber is installed on the side of the test box, and the nozzle is connected to a water pipe.

[0016] The above technical solution of the utility model has the following beneficial technical effects:

[0017] First, energize the electromagnetic adsorption component, then magnetically connect the cylindrical iron block to the bottom of the electromagnetic adsorption component, and then place the battery pack in the test chamber opened in the test box. Then, according to needs, the cylindrical iron block can be adjusted to different heights through the electromagnetic adsorption component. Then, the electromagnetic adsorption component is powered off, and the cylindrical iron block is separated from the electromagnetic adsorption component, falling in the drop tube and into the test box to impact and puncture the battery pack. Since the electromagnetic adsorption component can adjust the cylindrical iron block to different heights, the accuracy of the test can be improved. This structure adjusts the height of the cylindrical iron block through the electromagnetic adsorption component to simulate impacts of different speeds, thereby more accurately evaluating the safety performance of the battery pack in actual traffic accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a test device for acupuncture of the bottom of a battery pack proposed in the present invention.

[0019] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the central columnar iron block and the needle-punched part.

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the bottom structure of the central cylindrical iron block.

[0021] Figure 4 For this utility model Figure 2 Schematic diagram of the structure of the elastic top piece.

[0022] Figure numerals: 1. test box; 2. test chamber; 3. drop tube; 4. electromagnetic adsorption part; 41. mounting frame; 42. assembly block; 43. cylinder; 44. electromagnet; 5. cylindrical iron block; 6. puncture part; 61. threaded shaft; 62. test needle; 7. elastic top piece; 71. fixing tube; 72. spring; 73. ejector rod; 8. threaded hole; 9. nozzle. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0024] like Figure 1-4 As shown, the present invention provides a test device for acupuncture of the bottom of a battery pack, comprising a test box 1 and a test chamber 2 provided in the test box 1;

[0025] In this embodiment, a drop tube 3 communicating with the test chamber 2 is installed on the test box 1 .

[0026] In this embodiment, an electromagnetic adsorption component 4 is installed on the top of the drop tube 3, and a columnar iron block 5 is provided at the bottom of the electromagnetic adsorption component 4, and the height of the columnar iron block 5 is driven and adjusted by the electromagnetic adsorption component 4. The columnar iron block 5 has a first position state and a second position state. The columnar iron block 5 is in the first position state. When the electromagnetic adsorption component 4 is powered on, the columnar iron block 5 is magnetically connected to the electromagnetic adsorption component 4. The columnar iron block 5 is in the second position state. When the electromagnetic adsorption component 4 is powered off, the columnar iron block 5 is separated from the electromagnetic adsorption component 4 and falls in the drop tube 3.

[0027] In this embodiment, the electromagnetic adsorption component 4 includes a mounting frame 41, an assembly block 42, a cylinder 43 and an electromagnet 44. The top of the drop tube 3 is installed with an assembly block 42 located above the drop tube 3 through the mounting frame 41. The top of the assembly block 42 is installed with a cylinder 43. The driving end of the cylinder 43 is connected to the electromagnet 44. When the electromagnet 44 is energized, the columnar iron block 5 is magnetically connected to the electromagnet 44. When the electromagnet 44 is de-energized, the columnar iron block 5 is separated from the electromagnet 44.

[0028] In this embodiment, a needle-piercing part 6 is installed at the bottom of the cylindrical iron block 5. The needle-piercing part 6 includes a threaded shaft 61 and a test needle 62 installed on the threaded shaft 61. The number of threaded shafts 61 and test needles 62 is several. A number of evenly distributed threaded holes 8 are opened at the bottom of the cylindrical iron block 5. One threaded shaft 61 is threadedly connected to the threaded hole 8 located in the middle of the bottom surface of the cylindrical iron block 5. The test needle 62 on one threaded shaft 61 is opposite to the test box 1. The remaining test needles 62 are respectively inserted into the several threaded holes 8, and the threaded shafts 61 on the remaining test needles 62 are respectively threadedly connected to the several threaded holes 8.

[0029] First, energize the electromagnet 44, then magnetically connect the cylindrical iron block 5 to the bottom of the electromagnet 44, and then place the battery pack in the test chamber 2 opened in the test box 1. Then, as needed, the cylinder 43 can be used to drive the electromagnet 44 to move the cylindrical iron block 5 up and down, and the cylindrical iron block 5 can be adjusted to different height positions. Then, the electromagnet 44 is powered off, and the cylindrical iron block 5 is separated from the electromagnet 44, falls in the drop tube 3, and falls into the test box 1. The battery pack can be impact-punctured by the test needle 62 at the bottom of the cylindrical iron block 5. Since the cylinder 43 can adjust the cylindrical iron block 5 to different heights, the accuracy of the test can be improved. The structure adjusts the height of the cylindrical iron block 5 through the electromagnetic adsorption part 4, and can simulate impacts of different speeds, thereby more accurately evaluating the safety performance of the battery pack in actual traffic accidents.

[0030] In actual use, in order to be able to perform multi-point puncture tests on the battery pack, the threaded shaft 61 in the threaded hole 8 at the bottom of the remaining cylindrical iron block 5 can be unscrewed, and the test needle 62 can be taken out from the remaining threaded hole 8. Then, the threaded shaft 61 on the test needle 62 is threadedly connected to the threaded hole 8, so that the test needle 62 on the threaded shaft 61 is facing the battery pack, so that several test needles 62 are distributed at the bottom of the cylindrical iron block 5, which is used to perform multi-point puncture tests on the battery pack, which can further improve the accuracy of the battery pack test.

[0031] In a specific embodiment, an assembly hole is provided at the top of the cylindrical iron block 5, and an elastic top piece 7 is installed in the assembly hole, which abuts against the electromagnet 44. The elastic top piece 7 includes a fixed cylinder 71, a spring 72 and a top rod 73. The fixed cylinder 71 is installed in the assembly hole, and the top of the fixed cylinder 71 is flush with the top surface of the cylindrical iron block 5. An insertion cavity is provided in the fixed cylinder 71, and a spring 72 is installed in the insertion cavity. A top rod 73 is provided on the fixed cylinder 71, which is inserted into the insertion cavity and connected to the spring 72. The top rod 73 abuts against the bottom of the electromagnet 44.

[0032] When the electromagnet 44 is energized and the cylindrical iron block 5 is magnetically connected to its bottom, the push rod 73 contracts into the fixed tube 71 and squeezes the spring 72. When the electromagnet 44 is de-energized, the electromagnet 44 itself loses its magnetism. Since the spring 72 has a certain reaction force on the electromagnet 44 through the push rod 73, under the elastic action of the spring 72, the electromagnet 44 can be supported by the push rod 73 with the reaction force, so that the cylindrical iron block 5 can be quickly separated from the electromagnet 44.

[0033] In a specific embodiment, a nozzle 9 for spraying water into the test chamber 2 is installed on the side of the test box 1, and the nozzle 9 is connected to a water pipe.

[0034] When a battery pack catches fire during testing, the fire can be extinguished by spraying water on the burning battery pack through the nozzle 9.

[0035] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A battery pack bottom puncture test device, comprising a test box (1) and a test chamber (2) provided in the test box (1), characterized in that: The test box (1) is provided with a drop tube (3) in communication with the test chamber (2); An electromagnetic adsorption member (4) is installed on the top of the drop cylinder (3), a columnar iron block (5) is provided at the bottom of the electromagnetic adsorption member (4), and the height of the columnar iron block (5) is driven and adjusted by the electromagnetic adsorption member (4); The columnar iron block (5) has a first position state and a second position state. When the columnar iron block (5) is in the first position state and the electromagnetic adsorption member (4) is powered on, the columnar iron block (5) is magnetically connected to the electromagnetic adsorption member (4); when the columnar iron block (5) is in the second position state and the electromagnetic adsorption member (4) is powered off, the columnar iron block (5) is separated from the electromagnetic adsorption member (4) and falls in the drop tube (3); A needle-piercing member (6) is installed at the bottom of the columnar iron block (5).

2. A battery pack bottom puncture testing device according to claim 1, characterized in that: The electromagnetic adsorption component (4) includes a mounting frame (41), an assembly block (42), a cylinder (43) and an electromagnet (44). The top of the drop tube (3) is mounted with an assembly block (42) located above the drop tube (3) through the mounting frame (41). The top of the assembly block (42) is mounted with a cylinder (43). The driving end of the cylinder (43) is connected to the electromagnet (44). When the electromagnet (44) is energized, the columnar iron block (5) is magnetically connected to the electromagnet (44). When the electromagnet (44) is de-energized, the columnar iron block (5) is separated from the electromagnet (44).

3. The battery pack bottom puncture test device according to claim 2, characterized in that: The needle-piercing member (6) comprises a threaded shaft (61) and a test needle (62) mounted on the threaded shaft (61), the number of the threaded shaft (61) and the test needle (62) being several, the bottom of the columnar iron block (5) being provided with several evenly distributed threaded holes (8), one of the threaded shafts (61) being threadedly connected to the threaded hole (8) located in the middle of the bottom surface of the columnar iron block (5), one of the test needles (62) on the threaded shaft (61) being directly opposite to the test box (1), the remaining several test needles (62) being respectively inserted into the several threaded holes (8), and the threaded shafts (61) on the remaining several test needles (62) being respectively threadedly connected to the several threaded holes (8).

4. The battery pack bottom puncture test device according to claim 3, characterized in that: An assembly hole is provided on the top of the columnar iron block (5), and an elastic top piece (7) is installed in the assembly hole and abuts against the electromagnet (44).

5. The battery pack bottom puncture test device according to claim 4, characterized in that: The elastic top member (7) includes a fixed cylinder (71), a spring (72) and a top rod (73). The fixed cylinder (71) is installed in the assembly hole, and the top of the fixed cylinder (71) is flush with the top surface of the columnar iron block (5). The fixed cylinder (71) is provided with an insertion cavity, and the spring (72) is installed in the insertion cavity. The fixed cylinder (71) is provided with a top rod (73) inserted into the insertion cavity and connected to the spring (72). The top rod (73) abuts against the bottom of the electromagnet (44).

6. The battery pack bottom puncture testing device according to claim 1, characterized in that: A nozzle (9) for spraying water into the test chamber (2) is installed on the side of the test box (1), and the nozzle (9) is connected to a water pipe.

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