Testing device for bottom protective plate of battery pack

Abstract

Disclosed in the present application is a testing device for a bottom protective plate of a battery pack. The testing device comprises a base and a testing mechanism, wherein the base is configured to place a bottom protective plate, the base is provided with a measurement groove, a pressure sensor or a plastic deformable member being provided in the measurement groove, and the base is provided with a cushion block, the bottom protective plate and the base being spaced apart from each other by means of the cushion block to form an impact cavity, and the measurement groove being located in the impact cavity; and the testing mechanism comprises a testing support and an impact assembly, the testing support and the impact assembly being arranged on one side of the base, the impact assembly being hung on the testing support, and the impact assembly being located directly above the base.

Description

Battery pack bottom guard plate test device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 17, 2024, with application number 202421699147.X. The entire contents of the above application are incorporated by reference into this application.

[0002] Technical Field

[0003] 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.

[0004] Background Art

[0005] With the rapid development of the new energy battery industry, battery safety requirements are becoming increasingly stringent. The physical strength and impact resistance of electric vehicle battery packs are becoming increasingly important over their long-term use. Numerous incidents of battery pack fires in new energy vehicles due to underbody support have occurred, seriously endangering the lives and property of drivers and passengers. Therefore, the strength of the battery pack's underbody protection is particularly important.

[0006] There is currently no national standard for bottom guard plate protection for new energy battery packs, and the main test is based on the overall standard of the battery pack.

[0007] Technical issues

[0008] Testing the entire pack is extremely expensive and inefficient, both financially and time-consuming, making it unsuitable for large-scale material testing. Furthermore, testing the entire battery pack alone struggles to accurately assess the impact and deformation resistance of the underbody shield, hindering the initial design of the battery pack's underbody shield.

[0009] Technical Solutions

[0010] The present application provides a bottom guard plate testing device for a battery pack, which can realize performance testing of the bottom guard plate such as impact resistance and deformation resistance, and realize quantification of the strength performance design parameters and standards of the bottom guard plate.

[0011] A battery pack bottom guard plate testing device is provided, comprising a base and a testing mechanism, wherein the base is configured to place the bottom guard plate, the base is provided with a measuring slot, the measuring slot is provided with a pressure sensor or a plastic deformation part, the base is provided with a pad, the bottom guard plate and the base are spaced apart by the pad to form an impact cavity, and the measuring slot is located in the impact cavity; the testing mechanism comprises a test bracket and an impact assembly, the test bracket and the impact assembly are arranged on one side of the base, the impact assembly is suspended on the test bracket, and the impact assembly is located directly above the base.

[0012] Beneficial effects

[0013] Beneficial effects of the present application: The bottom guard plate testing device of the battery pack of the present application is configured by installing a pad on the base, and then placing the bottom guard plate to be tested on the pad. The bottom guard plate is spaced apart from the bottom plate by the pad to form an impact cavity. The impact assembly is then lifted by a test bracket arranged on one side of the base, and the impact assembly is positioned directly above the base, that is, the impact assembly is positioned 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. In the test process, a plurality of bottom guard plates to be tested of uniform specifications are prepared, and pressure sensors or plastic deformation parts are respectively placed in the measuring grooves of the base to measure the corresponding impact force values ​​through the pressure sensors, and the deformation values ​​of the bottom guard plate after being impacted are measured by the plastic deformation parts, thereby realizing the impact test data of the bottom guard plate, which is conducive to data quantification and is convenient for designing the bottom guard plate strength standard and selection of the corresponding battery pack according to the corresponding test data, thereby ensuring that the bottom guard plate can provide sufficient support and impact strength for the battery pack in actual application, thereby ensuring the safety of the battery pack.

[0014] BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic structural diagram of a battery pack bottom guard plate testing device provided in one embodiment of the present application;

[0016] FIG2 is a schematic structural diagram of a base provided in one embodiment of the present application;

[0017] FIG3 is a schematic diagram of the bottom structure of a base provided in one embodiment of the present application;

[0018] FIG4 is a schematic structural diagram of a pressure sensor provided in one embodiment of the present application;

[0019] FIG5 is a schematic structural diagram of a support vertical rod provided in one embodiment of the present application;

[0020] FIG6 is a schematic diagram of a connection structure between an impact assembly and a support crossbar provided in one embodiment of the present application;

[0021] FIG7 is a schematic structural diagram of another battery pack bottom guard plate testing device provided in one embodiment of the present application;

[0022] FIG8 is a schematic structural diagram of another battery pack bottom guard plate testing device provided in an embodiment of the present application.

[0023] In the picture:

[0024] 100, base; 110, measuring slot; 120, wire trough; 130, first mounting hole; 200, testing mechanism; 210, testing bracket; 211, supporting vertical rod; 211a, fixing rod; 211b, moving rod; 2111, height scale; 2112, first positioning hole; 2113, second positioning hole; 2114, latch; 212, supporting horizontal rod; 213, pulley; 214, connecting rope; 220, impact assembly; 221, impact carrier; 222, impact head; 2221, impact part; 230, base; 240, reinforcing rib; 300, bottom guard plate; 310, third mounting hole; 400, pressure sensor; 410, connecting line; 500, plastic deformation part; 600, pad; 610, second mounting hole.

[0025] Modes for Carrying Out the Invention

[0026] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended to explain the present application, not to limit the present application. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present application, not all structures.

[0027] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. A person of ordinary skill in the art will be able to understand the meaning of these terms in this application based on the circumstances.

[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may indicate that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may indicate that the first feature is at a lower level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0030] As shown in Figures 1 to 6, a bottom guard plate testing device for a battery pack in this embodiment includes a base 100 and a testing mechanism 200, wherein the base 100 is configured to place a bottom guard plate 300, a measuring groove 110 is provided on the base 100, a pressure sensor 400 or a plastic deformation part 500 is provided in the measuring groove 110, a pad 600 is provided on the base 100, the bottom guard plate 300 and the base 100 are spaced apart by the pad 600 to form an impact cavity, and the measuring groove 110 is located in the impact cavity; the testing mechanism 200 includes a test bracket 210 and an impact assembly 220, the test bracket 210 and the impact assembly 220 are arranged on one side of the base 100, the impact assembly 220 is suspended on the test bracket 210, and the impact assembly 220 is located directly above the base 100.

[0031] In this embodiment, a pad 600 is installed on the base 100, and the bottom guard plate 300 to be tested is placed on the pad 600. The bottom guard plate 300 is spaced apart from the bottom plate by the pad 600 to form an impact cavity. The impact assembly 220 is then hoisted by a test bracket 210 provided on one side of the base 100, and positioned directly above the base 100, that is, directly above the bottom guard plate 300. The impact assembly 220 then drops vertically from the test bracket 210 to perform an impact collision test on the bottom guard plate 300. Among them, during the test process, multiple bottom guard plates 300 to be tested of uniform specifications are prepared, and pressure sensors 400 or plastic deformation parts 500 are placed in the measuring groove 110 of the base 100 respectively, so as to measure the corresponding impact force value through the pressure sensor 400, and obtain the deformation value of the bottom guard plate 300 after the impact through the plastic deformation part 500, thereby realizing the impact test data of the bottom guard plate 300, which is conducive to data quantification and convenient for designing the strength standard and selection of the bottom guard plate 300 of the corresponding battery pack according to the corresponding test data, thereby ensuring that the bottom guard plate 300 can provide sufficient support and impact resistance for the battery pack in actual application, thereby ensuring the safety of the battery pack.

[0032] In one embodiment, the testing mechanism 200 also includes a base 230, which is arranged on the other side of the base 100. The test bracket 210 is detachably mounted on the base 230, so that test brackets 210 of different specifications can be replaced according to the testing requirements of different bottom guard plates 300 to meet the corresponding testing requirements, which is convenient and flexible for testing a variety of bottom guard plates 300 and has strong versatility.

[0033] In one embodiment, the test stand 210 includes a support vertical rod 211 and a support horizontal rod 212 connected to each other, the impact assembly 220 is connected to the support horizontal rod 212, the support horizontal rod 212 is connected to the support vertical rod 211, and the end of the support vertical rod 211 away from the support horizontal rod 212 is connected to the base 230.

[0034] In one embodiment, the test bracket 210 includes two supporting vertical rods 211, and the two ends of the supporting horizontal rod 212 are respectively connected to the two supporting vertical rods 211 to form a gantry-shaped test bracket 210. The impact assembly 220 is hoisted on the supporting horizontal rod 212 of the gantry-shaped test bracket 210, and the impact assembly 220 is located directly above the base 100, so that the impact assembly 220 falls vertically to perform an impact test on the bottom guard plate 300 on the base 100.

[0035] In one embodiment, as shown in FIG7 , a test stand 210 includes a vertical support rod 211, one end of a horizontal support rod 212 connected to the vertical support rod 211. The test stand 210 has a г-shaped structure, i.e., an inverted L-shaped structure. An impact assembly 220 is hoisted onto the end of the horizontal support rod 212 away from the vertical support rod 211, positioned directly above the base 100 so that the impact assembly 220 can drop vertically to perform an impact test on the bottom guard plate 300 on the base 100.

[0036] In one embodiment, as shown in FIG8 , a test stand 210 includes a vertical support rod 211 and a horizontal support rod 212 bent into an arc-shaped structure. Both ends of the horizontal support rod 212 are connected to the vertical support rod 211 and are located at the same horizontal height. An impact assembly 220 is hoisted onto the horizontal support rod 212 at a position opposite the vertical support rod 211 and positioned directly above the base 100 , allowing the impact assembly 220 to drop vertically to perform an impact test on the bottom guard plate 300 on the base 100 .

[0037] In order to ensure the stability of the test bracket 210, the connection between the support vertical rod 211 and the base 230 and the connection between the support vertical rod 211 and the support horizontal rod 212 are both provided with a reinforcing rib 240 structure, thereby ensuring the overall stability of the test bracket 210 and further ensuring the stability of the entire testing operation.

[0038] In one embodiment, the support vertical rod 211 includes a fixed rod 211a and a movable rod 211b. The fixed rod 211a is fixedly connected to the base 230. One end of the movable rod 211b is telescopically connected to the fixed rod 211a, and the other end of the movable rod 211b is fixedly connected to the support crossbar 212. During the test, according to the energy law, the movable rod 211b can be adjusted to move telescopically on the fixed rod 211a according to the required impact amount to adjust the height of the support crossbar 212, that is, to adjust the height of the impact assembly 220 hoisted on the support crossbar 212, so that the impact assembly 220 can achieve a corresponding impact amount on the bottom guard plate 300 when it falls vertically, and the impact force value and deformation value of the bottom guard plate 300 under the impact of the specific impact amount can be obtained.

[0039] A height scale 2111 is provided on the support vertical rod 211, and the height scale 2111 can be set on the fixed rod 211a and the movable rod 211b respectively, or only on the movable rod 211b, so that when the relative movement of the movable rod 211b and the fixed rod 211a is adjusted, the height of the support horizontal rod 212 connected to the movable rod 211b, that is, the height of the impact assembly 220, can be accurately obtained, and the height of the impact assembly 220 can be adjusted accordingly according to the preset impact amount. A first positioning hole 2112 is provided on the fixed rod 211a, and a plurality of second positioning holes 2113 corresponding to the first positioning hole 2112 are provided on the movable rod 211b. When the movable rod 211b moves to the corresponding position relative to the fixed rod 211a, a fixing part such as a latch 2114 passes through the first positioning hole 2112 and the second positioning hole 2113 to realize the fixed positioning of the movable rod 211b and the fixed rod 211a, so that the supporting cross bar 212 connected to the movable rod 211b and the impact assembly 220 hoisted on the supporting cross bar 212 are maintained at a fixed height.

[0040] In one embodiment, the impact assembly 220 includes an impact carrier 221 and an impact head 222. The impact head 222 is arranged in the direction toward the base 100 through the impact carrier 221. The impact head 222 is provided with a hemispherical, conical or truncated cone-shaped impact portion 2221 on the side facing the base 100.

[0041] In one embodiment, a pulley 213 is provided on the test stand 210, and the impact assembly 220 is connected to the pulley 213 via a connecting rope 214 and is suspended on the test stand 210. The use of the pulley 213 allows the impact assembly 220 to slide along the connecting rope 214 and the pulley 213. The pulley 213 can limit the vertical drop of the impact assembly 220, ensuring that the impact assembly 220 falls vertically along the groove of the pulley 213 via the connecting rope 214, thereby preventing the impact assembly 220 from deflecting during the drop. Furthermore, the connection via the pulley 213 ensures that the impact assembly 220 maintains a smooth drop during the vertical drop, while also reducing energy loss during the drop of the impact assembly 220, thereby reducing the impact on the test results and ensuring the accuracy of the test structure.

[0042] In one embodiment, the pressure sensor 400 is placed in the measuring groove 110 and spaced apart from the bottom guard plate 300, and the end face of the pressure sensor 400 facing the bottom guard plate 300 is flush with the end face of the base 100 facing the bottom guard plate 300, so as to reserve a certain deformation amplitude of the bottom guard plate 300 in the impact cavity after being impacted, simulating the actual situation of the battery module being subjected to the impact force transmitted by the bottom guard plate 300 when the bottom guard plate 300 is impacted, so that the impact force value transmitted to the battery module when the bottom guard plate 300 is impacted obtained in the test is closer to the actual impact value, thereby improving the accuracy of the test.

[0043] In one embodiment, the base 100 is provided with a wire groove 120. One end of the wire groove 120 is connected to the measuring groove 110, and the other end of the wire groove 120 extends to a side edge of the base 100, so that the pressure sensor 400 can be installed in the measuring groove 110. The connecting wire 410 of the pressure sensor 400 can be guided through the wire groove 120 to the outside of the base 100 and connected to a data terminal or control terminal to achieve data transmission and recording. By providing the wire groove 120 on the base 100, it is possible to prevent the connecting wire 410 of the pressure sensor 400 from interfering with the flatness of the base 100, maintain the horizontal placement of the base 100, and improve the accuracy of the test.

[0044] In one embodiment, the plastic deformation member 500 is filled in the measuring groove 110 and is spaced apart from the bottom guard plate 300, and the end face of the plastic deformation member 500 facing the bottom guard plate 300 is flush with the end face of the base 100 facing the bottom guard plate 300, so as to simulate the actual situation of the battery module being subjected to the impact force transmitted by the bottom guard plate 300 when the bottom guard plate 300 is impacted, thereby obtaining the degree of influence of the deformation value of the bottom guard plate 300 after being impacted on the battery module in real conditions, thereby improving the accuracy of the test. In actual operation, the plastic deformation member 500 is ultra-light clay. Ultra-light clay is soft and has strong moldability. It can accurately and effectively reflect the deformation of the bottom guard plate 300, and ultra-light clay can be reused repeatedly, which is safe and environmentally friendly. Of course, in addition to this embodiment, other plastic deformation members 500 such as plastic deformation rubber can also be used. As long as the plastic deformation of the plastic deformation member 500 can be used to measure and reflect the deformation of the bottom guard plate 300, such designs all fall within the scope of protection of this application.

[0045] In one embodiment, the base 100 and the cushion block 600 are detachably connected. The base 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. The bottom guard plate 300 is generally provided with third mounting holes 310 for mounting and connecting with the battery pack case. Accordingly, first mounting holes 130 and second mounting holes 610 corresponding to the positions of the third mounting holes 310 are provided on the bottom guard plate 300, so that the bottom guard plate 300 can be mounted and fixed to the base 100 and the cushion block 600.

[0046] In actual operation, taking the bottom guard plate 300 of the rectangular battery pack as an example, the plate surface of the bottom guard plate 300 is rectangular, and the third mounting hole 310 on the bottom guard plate 300 is arranged along the four edges of the bottom guard plate 300, wherein the pad 600 is in a U-shape, so that the second mounting hole 610 on the pad 600 is arranged corresponding to the third mounting hole 310, and the first mounting hole 130 on the bottom plate is also arranged corresponding to the second mounting hole 610 and the first mounting hole 130, ensuring that the bottom guard plate 300, the pad 600 and the base 100 are installed and fixed.

[0047] The base 100 is provided with a plurality of groups of first mounting holes 130 arranged in a circular array, so that the bottom guard plate 300 can be installed using a group of first mounting holes 130 according to the size of the bottom guard plate 300 of different specifications, and the corresponding specifications of the gasket 600 can be used according to the corresponding specifications of the bottom guard plate 300, thereby improving the versatility of the base 100 and avoiding the need to set up multiple bases 100 corresponding to the bottom guard plates 300 of different specifications, which is conducive to reducing production costs.

Claims

1. A battery pack bottom guard plate testing device, comprising: A base (100) is arranged to place a bottom guard plate (300), the base (100) is provided with a measuring groove (110), a pressure sensor (400) or a plastic deformation member (500) is arranged in the measuring groove (110), a cushion block (600) is arranged on the base (100), the bottom guard plate (300) and the base (100) are spaced apart by the cushion block (600) to form an impact cavity, and the measuring groove (110) is located in the impact cavity; A testing mechanism (200), the testing mechanism (200) comprising a testing bracket (210) and an impact assembly (220), the testing bracket (210) and the impact assembly (220) being arranged on one side of the base (100), the impact assembly (220) being suspended on the testing bracket (210), and the impact assembly (220) being located directly above the base (100).

2. The bottom guard plate testing device of the battery pack according to claim 1, wherein: The testing mechanism (200) further comprises a base (230), wherein the base (230) is arranged on the other side of the base (100), and the testing bracket (210) is detachably mounted on the base (230).

3. The bottom guard plate testing device of the battery pack according to claim 2, wherein: The test stand (210) comprises a supporting vertical rod (211) and a supporting cross rod (212) connected to each other, the impact assembly (220) is connected to the supporting cross rod (212), the supporting cross rod (212) is connected to the supporting vertical rod (211), and one end of the supporting vertical rod (211) away from the supporting cross rod (212) is connected to the base (230).

4. The bottom guard plate testing device of the battery pack according to claim 3, wherein: The test bracket (210) comprises two supporting vertical rods (211), two ends of the supporting horizontal rod (212) are respectively connected to the two supporting vertical rods (211), and the test bracket (210) is a door-shaped structure.

5. The bottom guard plate testing device of the battery pack according to claim 3, wherein: The test bracket (210) comprises a supporting vertical rod (211), one end of the supporting horizontal rod (212) is connected to the supporting vertical rod (211), and the test bracket (210) is a г-shaped structure.

6. The bottom guard plate testing device of the battery pack according to claim 3, wherein: The test bracket (210) comprises a supporting vertical rod (211), the supporting cross rod (212) being configured to be bent into an arc-shaped structure, both ends of the supporting cross rod (212) being connected to the supporting vertical rod (211), and both ends of the supporting cross rod (212) being located at the same horizontal height.

7. The bottom guard plate testing device of the battery pack according to any one of claims 3 to 6, wherein: The supporting vertical rod (211) comprises a fixed rod (211a) and a movable rod (211b), wherein the fixed rod (211a) is fixedly connected to the base (230), one end of the movable rod (211b) is telescopically connected to the fixed rod (211a), and the other end of the movable rod (211b) is fixedly connected to the supporting horizontal rod (212).

8. The bottom guard plate testing device of the 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 disposed through the impact carrier (221) in a direction toward the base (100); and a hemispherical, conical or truncated cone-shaped impact portion (2221) is provided on a side of the impact head (222) facing the base (100).

9. The bottom guard plate testing device of a battery pack according to any one of claims 1 to 8, wherein: A pulley (213) is provided on the test bracket (210), and the impact assembly (220) is connected to the pulley (213) via a connecting rope (214) so ​​as to be suspended on the test bracket (210).

10. The bottom guard plate testing device of a battery pack according to any one of claims 1 to 9, wherein: The pressure sensor (400) is placed in the measuring groove (110) and 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 base (100) facing the bottom guard plate (300).

11. The bottom guard plate testing device of a battery pack according to any one of claims 1 to 10, wherein: The base (100) is provided with a wire groove (120), one end of the wire groove (120) is communicated with the measuring groove (110), and the other end of the wire groove (120) penetrates to a side edge of the base (100).

12. The bottom guard plate testing device of a battery pack according to any one of claims 1 to 9, wherein: The plastic deformation member (500) is filled in the measuring groove (110) and is spaced apart from the bottom guard plate (300), and an end surface of the plastic deformation member (500) facing the bottom guard plate (300) is flush with an end surface of the base (100) facing the bottom guard plate (300).

13. The bottom guard plate testing device of a battery pack according to any one of claims 1 to 12, wherein: The base (100) is detachably connected to the cushion block (600); a plurality of first mounting holes (130) are provided on the base (100); a plurality of second mounting holes (610) are provided on the cushion block (600) and are arranged corresponding to the first mounting holes (130); and a third mounting hole (310) is provided on the bottom guard plate (300) and is arranged corresponding to the first mounting holes (130) and the second mounting holes (610), respectively.

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