Apparatus for testing bottom protection plate of battery pack

Abstract

An apparatus for testing a bottom protective board of a battery pack includes a base and a testing mechanism.SOLUTION: The base 100 is configured to support the bottom protective plate 300, the base 100 is provided with a measurement groove, a pressure sensor and a plastic deformation member are provided in the measurement groove, the base 100 is provided with a spacer block, and the bottom protective plate 300 and the base 100 are spaced apart by the spacer block to form an impact chamber; The test groove is located in the impact chamber, the test mechanism 200 includes a test stand 210 and an impact component 220, the test stand 210 and the impact component 220 are disposed on one side of the base 100, and the impact component 220 is suspended on the test stand 210 and located right above the base 100.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application bearing application number 202421699147.X, filed with the China Patent Office on July 17, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of battery pack testing equipment, for example, to a testing device for the bottom protection plate of a battery pack. [Background technology]

[0003] With the rapid development of the new energy battery industry, the safety requirements for batteries are also becoming higher and higher. For the long-term use of battery packs in electric vehicles, the physical strength and crashworthiness of the battery pack are becoming increasingly important. Many new energy vehicles on the market have battery packs that have been subject to fire due to bottom scraping, which poses a serious risk to the lives and property safety of drivers and passengers, so the bottom protective plate of the battery pack is particularly important.

[0004] For the time being, there is no national standard for the protection of the bottom protective plate of new energy battery packs, and the main test is based on the overall standard of the battery pack. Summary of the Invention [Problem to be solved by the invention]

[0005] The cost of testing the entire battery pack is very high, the efficiency is low, the economic and time costs of the test are too high, and it is not applicable to testing a large number of materials. Furthermore, the overall test of the battery pack makes it difficult to individually reflect the performance of the bottom protective plate, such as impact resistance and strain resistance, which is disadvantageous to the early design of the bottom protective plate of the battery pack. [Means for solving the problem]

[0006] The present application provides a testing device for the bottom protective plate of a battery pack, which can test the performance of the bottom protective plate, such as impact resistance and distortion resistance, and can quantify the strength performance design parameters and standards of the bottom protective plate.

[0007] A testing device for a bottom protective plate of a battery pack is provided, comprising a base and a testing mechanism. The base is configured to place the bottom protective plate thereon and is provided with a measurement groove in which a pressure sensor and a plastic deformation member are provided, and a spacer block. The bottom protective plate and the base are spaced apart via the spacer block to form an impact chamber, the measurement groove being located within the impact chamber. The testing mechanism comprises a test stand and an impact component provided on one side of the base, the impact component being suspended from the test stand and located directly above the base. [Effects of the Invention]

[0008] The beneficial effects of the present invention are as follows: The testing device for the bottom protection plate of a battery pack of the present invention attaches spacer blocks to a base, and then places the bottom protection plate to be tested on the spacer blocks, so that the bottom protection plate is spaced apart from the bottom plate via the spacer blocks to form an impact chamber. An impact component is then hoisted using a test stand attached to one side of the base and positioned directly above the base, i.e., the impact component is positioned directly above the bottom protection plate, and the impact component is then dropped vertically from the test stand to perform an impact collision test on the bottom protection plate. During the testing process, a number of bottom protective plates with uniform specifications are prepared for testing, and pressure sensors and plastic deformation members are placed in the measurement grooves of the base, and the pressure sensors measure the corresponding impact force values, and the plastic deformation members measure the distortion values ​​of the bottom protective plate after impact to obtain impact test data for the bottom protective plate, which is advantageous for achieving data quantification, and makes it easier to design the strength specifications and selective use of the bottom protective plate of the corresponding battery pack based on the corresponding test data, ensuring that the bottom protective plate can provide sufficient support and impact resistance for the battery pack in the actual application of the battery pack, and ensuring the safety of the battery pack in use. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a structural schematic diagram of a testing device for a bottom protection plate of a battery pack according to an embodiment of the present application; [Figure 2] 1 is a structural schematic diagram of a base according to an embodiment of the present application; [Figure 3] FIG. 2 is a structural schematic diagram of the bottom surface of a base according to an embodiment of the present application. [Figure 4] 1 is a structural schematic diagram of a pressure sensor according to an embodiment of the present invention; [Figure 5] 1 is a structural schematic diagram of a support vertical rod according to an embodiment of the present application; [Figure 6] 1 is a structural diagram illustrating the connection between the impact component and the supporting cross bar according to an embodiment of the present application; [Figure 7] 10 is a structural schematic diagram of another battery pack bottom protection plate testing device according to an embodiment of the present application; FIG. [Figure 8] 10 is a structural schematic diagram of another battery pack bottom protection plate testing device according to an embodiment of the present application; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present application will be described in more detail below with reference to the drawings and examples. It will be understood that the specific examples described here are merely for the purpose of understanding the present application and are not intended to limit the present application. For ease of explanation, the drawings show only a portion of the present application, not all of the structures.

[0011] In the description of this application, unless otherwise clearly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interaction between two elements. Those skilled in the art can understand the meaning of the terms in this application depending on the context.

[0012] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may include the first feature being directly above and diagonally above the second feature, or the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may include the first feature being directly below and diagonally below the second feature, or the first feature having a lower horizontal height than the second feature.

[0013] In the description of the present embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are merely used to facilitate the description and simplify the operation. They do not indicate or imply that the referenced devices or elements must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are merely used to distinguish between the two in the description and do not have any special meaning.

[0014] As shown in Figures 1 to 6, the testing device for the bottom protective plate of a battery pack in this embodiment comprises a base 100 and a testing mechanism 200, of which the base 100 is configured to place the bottom protective plate 300 and has a measurement groove 110, in which a pressure sensor 400 and a plastic deformation member 500 are provided, a spacer block 600 is provided on the base 100, and the bottom protective plate 300 and the base 100 are spaced apart by the spacer block 600 to form an impact chamber, the measurement groove 110 is located within the impact chamber, and the testing mechanism 200 comprises a test stand 210 and an impact component 220, the test stand 210 and the impact component 220 are arranged on one side of the base 100, and the impact component 220 is suspended from the test stand 210 and located directly above the base 100.

[0015] In this embodiment, a spacer block 600 is attached to the base 100, and then the bottom protection plate 300 to be tested is placed on the spacer block 600, so that the bottom protection plate 300 is spaced apart from the bottom plate via the spacer block 600, thereby forming an impact chamber. Then, an impact component 220 is lifted by a test stand 210 installed on one side of the base 100 and positioned directly above the base 100, i.e., the impact component 220 is positioned directly above the bottom protection plate 300, so that the impact component 220 is dropped vertically from the test stand 210 to perform an impact collision test on the bottom protection plate 300. During the testing process, a number of bottom protective plates 300 of uniform specifications are prepared for testing, and pressure sensors 400 and plastic deformation members 500 are placed in the measurement grooves 110 of the base 100, respectively. The pressure sensors 400 measure the corresponding impact force values, and the plastic deformation members 500 measure the distortion values ​​of the bottom protective plate 300 after impact to obtain impact test data for the bottom protective plate 300, which is advantageous for achieving data quantification. This facilitates the design of strength specifications and selective use of the bottom protective plate 300 of the corresponding battery pack based on the corresponding test data, ensures that the bottom protective plate 300 can provide sufficient support and impact resistance for the battery pack in the actual application of the battery pack, and ensures the safety of the battery pack in use.

[0016] In one embodiment, the testing mechanism 200 further includes a base 230, which is disposed on the other side of the base 100, and the test stand 210 is removably attached to the base 230, so that test stands 210 of different specifications can be replaced according to the test requirements of different bottom protection plates 300, so as to meet the corresponding test requirements and easily and flexibly accommodate the testing of multiple types of bottom protection plates 300, and is highly versatile.

[0017] In one embodiment, the test stand 210 comprises a vertical support rod 211 and a horizontal support rod 212 connected to each other, the impact component 220 is connected to the horizontal support rod 212, the horizontal support rod 212 is connected to the vertical support rod 211, and one end of the vertical support rod 211 away from the horizontal support rod 212 is connected to the base 230.

[0018] In one embodiment, the test stand 210 has two vertical support rods 211, and both ends of the horizontal support rod 212 are connected to the two vertical support rods 211 respectively to form a portal-shaped test stand 210, and the impact component 220 is suspended from the horizontal support rods 212 of the portal-shaped test stand 210 and positioned directly above the base 100 so that the impact component 220 can be dropped vertically to perform an impact test on the bottom protective plate 300 of the base 100.

[0019] 7, the test stand 210 has one vertical support rod 211, one end of a horizontal support rod 212 is connected to the vertical support rod 211, and the test stand 210 has a B-shaped structure, i.e., an inverted L-shaped structure. The impact component 220 is suspended from one end of the horizontal support rod 212 away from the vertical support rod 211 and positioned directly above the base 100 so that the impact component 220 can be dropped vertically to perform an impact test on the bottom protection plate 300 of the base 100.

[0020] 8 , the test stand 210 includes a vertical support rod 211 and a horizontal support rod 212 that is bent into an arc shape, with both ends connected to the vertical support rod 211 and positioned at the same horizontal height. The impact component 220 is suspended from the horizontal support rod 212 at a position opposite the vertical support rod 211 and positioned directly above the base 100 so that the impact component 220 can be dropped vertically to perform an impact test on the bottom protective plate 300 of the base 100.

[0021] In order to ensure the stability of the test stand 210, the connection points between the vertical support rod 211 and the base 230 and the connection points between the vertical support rod 211 and the horizontal support rod 212 are both provided with reinforcing rib structures 240, which ensure the overall stability of the test stand 210 and further the stability of the entire testing operation.

[0022] In one embodiment, the supporting 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 retractably connected to the fixed rod 211a, and the other end is fixedly connected to the supporting horizontal rod 212. During the test, when the impact component 220 is dropped vertically, the movable rod 211b is adjusted to retract and move with the fixed rod 211a according to the required impact amount, and the height of the supporting horizontal rod 212 is adjusted, i.e., the height of the impact component 220 suspended by the supporting horizontal rod 212 is adjusted, thereby obtaining the impact force value and distortion value of the bottom protective plate 300 at a specific impact amount.

[0023] The support vertical rod 211 is provided with a height scale 2111, and the height scale 2111 may be provided on each of the fixed rod 211a and the movable rod 211b or on the movable rod 211b only, so that when the movable rod 211b is adjusted to move relative to the fixed rod 211a, the height of the support horizontal rod 212 connected to the movable rod 211b, i.e., the height of the impact component 220, can be accurately obtained, and the height of the impact component 220 can be correspondingly adjusted based on the preset impact amount. The fixed rod 211a is provided with a first positioning hole 2112, and the movable rod 211b is provided with a plurality of second positioning holes 2113 corresponding to the first positioning holes 2112. After the movable rod 211b moves to a position corresponding to the fixed rod 211a, a fixing member such as a pin 2114 is passed through the first positioning hole 2112 and the second positioning hole 2113 to fix and position the movable rod 211b and the fixed rod 211a, and maintain the support cross bar 212 connected to the movable rod 211b and the impact component 220 suspended by the support cross bar 212 at a certain height.

[0024] In one embodiment, the impact component 220 comprises an impact carrier 221 and an impact head 222, the impact head 222 is inserted into the impact carrier 221 along a direction toward the base 100, and the side of the impact head 222 toward the base 100 is provided with a hemispherical, conical or frustoconical impact portion 2221.

[0025] In one embodiment, the test stand 210 is provided with a pulley 213, and the impact component 220 is connected to the pulley 213 via a connecting rope 214 and suspended from the test stand 210. The connection via the pulley 213 allows the impact component 220 to slide while connected to the pulley 213 via the connecting rope 214. The pulley 213 can restrict the position of the impact component 220 when it is dropped vertically, ensuring that the impact component 220 falls vertically along the rolling groove of the pulley 213 via the connecting rope 214, which is advantageous for preventing the impact component 220 from slipping during the drop. Furthermore, the connection via the pulley 213 allows the impact component 220 to fall vertically, ensuring a smooth drop and reducing energy loss during the drop, which reduces the impact on the test results and ensures the accuracy of the test results.

[0026] In one embodiment, the pressure sensor 400 is placed in the measurement groove 110 and spaced apart from the bottom protective plate 300, and its end face facing the bottom protective plate 300 is flush with the end face of the base 100 facing the bottom protective plate 300, thereby leaving a certain width for the bottom protective plate 300 to deform in the impact chamber after being impacted, simulating the actual situation in which the battery module is subjected to the impact force transmitted from the bottom protective plate 300 when the bottom protective plate 300 is impacted, so that the impact force value transmitted to the battery module when the bottom protective plate 300 is impacted obtained in the test is closer to the actual impact value, thereby improving the accuracy of the test.

[0027] In one embodiment, the base 100 is provided with a wiring groove 120, one end of which communicates with the measurement groove 110 and the other end of which penetrates to one edge of the base 100, so that the pressure sensor 400 is mounted in the measurement groove 110 and the connecting wire 410 of the pressure sensor 400 can be led to the outside of the base 100 by the wiring groove 120 and connected to a data terminal or control terminal for data transmission and recording. The provision of the wiring groove 120 in the base 100 prevents the connecting wire 410 of the pressure sensor 400 from interfering with the flatness of the base 100, ensuring that the base 100 is placed horizontally and improving the accuracy of the test.

[0028] In one embodiment, the plastic deformation member 500 is filled in the measurement groove 110 and spaced apart from the bottom protective plate 300, with its end surface facing the bottom protective plate 300 flush with the end surface of the base 100 facing the bottom protective plate 300, thereby simulating the actual situation in which the battery module is subjected to the impact force transmitted from the bottom protective plate 300 when the bottom protective plate 300 is impacted. In the actual situation, the deformation value of the bottom protective plate 300 after impact can be obtained to determine the degree of impact on the battery module, thereby improving the accuracy of the test. In actual operation, the plastic deformation member 500 is ultra-lightweight clay, which is soft and has good shapeability, and can accurately and effectively represent the distortion of the bottom protective plate 300. Furthermore, ultra-lightweight clay can be reused, is safe, and is environmentally friendly. Of course, in addition to the one in this embodiment, other plastic deformation members 500 such as plastic deformation rubber may be used, as long as the plastic deformation of the plastic deformation member 500 can measure and reflect the amount of distortion of the bottom protective plate 300, and all such designs fall within the scope of protection of the present application.

[0029] In one embodiment, the base 100 and the spacer block 600 are detachably connected, the base 100 is provided with a plurality of first mounting holes 130, the spacer block 600 is provided with a plurality of second mounting holes 610 corresponding to the first mounting holes 130, and the bottom protective plate 300 is provided with third mounting holes 310 corresponding to the first mounting holes 130 and the second mounting holes 610, respectively. The bottom protective plate 300 is typically provided with the third mounting holes 310 that are attached to and connected to the case of a battery pack, so that the first mounting holes 130 and the second mounting holes 610 are correspondingly provided based on the third mounting holes 310 in the bottom protective plate 300, thereby enabling the bottom protective plate 300 to be attached and fixed to the base 100 and the spacer block 600.

[0030] In actual operation, taking the bottom protective plate 300 of a rectangular battery pack as an example, the bottom protective plate 300 has a rectangular plate surface, and the third mounting holes 310 are arranged along the edges of the four sides of the bottom protective plate 300, among which the spacer block 600 is convoluted so that the second mounting hole 610 is arranged corresponding to the third mounting hole 310, and the first mounting hole 130 on the base is also arranged corresponding to the second mounting hole 610 and the third mounting hole 310, thereby ensuring the installation and fixation of the three components: the bottom protective plate 300, the spacer block 600, and the base 100.

[0031] Since the base 100 has first mounting holes 130 arranged in multiple groups of circular arrays, one group of first mounting holes 130 can be used to mount the bottom protective plate 300 according to the size of the bottom protective plate 300 with different specifications, and a spacer block 600 with corresponding specifications can be used according to the specifications of the corresponding bottom protective plate 300.This improves the versatility of the base 100 and avoids the need to provide multiple bases 100 to accommodate bottom protective plates 300 with different specifications, which is advantageous for reducing production costs. [Explanation of symbols]

[0032] 100... Base, 110... Measurement groove, 120... Wiring groove, 130... First mounting hole, 200... Test mechanism, 210... Test stand, 211... Support vertical rod, 211a... Fixed rod, 211b... Moving rod, 2111... Height scale, 2112... First positioning hole, 2113... Second positioning hole, 2114... Insert pin, 212... Support horizontal rod, 213... Pulley, 214···Connecting rope, 220···Impact component, 221···Impact carrier, 222···Impact head, 2221···Impact part, 230···Base, 240···Reinforcing rib structure, 300···Bottom protective plate, 310···Third mounting hole, 400···Pressure sensor, 410···Connecting line, 500···Plastic deformation member, 600···Spacer block, 610···Second mounting hole.

Claims

1. a base (100) configured to mount a bottom protection plate (300), having a measurement groove (110) in which a pressure sensor (400) and a plastic deformation member (500) are provided, and a spacer block (600), and the base (100) is spaced apart from the bottom protection plate (300) via the spacer block (600) to form an impact chamber, the measurement groove (110) being located within the impact chamber; a test stand (210) and an impact component (220) provided on one side of the base (100), the impact component (220) being suspended from the test stand (210), and a test mechanism (200) located directly above the base (100); Test equipment for the bottom protection plate of a battery pack.

2. The test mechanism (200) further comprises a base (230) provided on the other side of the base (100) and to which the test stand (210) is removably attached.

2. A testing device for a bottom protection plate of a battery pack according to claim 1.

3. The test stand (210) comprises a support vertical rod (211) connected to each other, and a support horizontal rod (212) to which the impact component (220) is connected and which is connected to the support vertical rod (211), and one end of the support vertical rod (211) remote from the support horizontal rod (212) is connected to the base (230).

3. The device for testing the bottom protection plate of a battery pack according to claim 2.

4. The test stand (210) has a portal structure and includes two vertical support rods (211) connected to both ends of the horizontal support rod (212).

4. The device for testing the bottom protection plate of a battery pack according to claim 3.

5. The test stand (210) has one vertical support rod (211) connected to one end of the horizontal support rod (212), and has a B-shaped structure.

4. The device for testing the bottom protection plate of a battery pack according to claim 3.

6. The test stand (210) has a vertical support rod (211), and the horizontal support rod (212) is bent in an arc shape, both ends of which are connected to the vertical support rod (211) and are at the same horizontal height.

4. The device for testing the bottom protection plate of a battery pack according to claim 3.

7. The vertical support rod (211) comprises a fixed rod (211a) fixedly connected to the base (230), and a movable rod (211b) whose one end is retractably connected to the fixed rod (211a) and whose other end is fixedly connected to the horizontal support rod (212).

4. The device for testing the bottom protection plate of a battery pack according to claim 3.

8. The impact component (220) comprises an impact carrier (221) and an impact head (222) that is inserted into the impact carrier (221) along a direction toward the base (100) and has a hemispherical, conical, or truncated conical impact portion (2221) on the side toward the base (100).

2. A testing device for a bottom protection plate of a battery pack according to claim 1.

9. The test stand (210) is provided with a pulley (213), and the impact component (220) is connected to the pulley (213) via a connecting rope (214) and suspended from the test stand (210).

2. A testing device for a bottom protection plate of a battery pack according to claim 1.

10. The pressure sensor (400) is placed in the measurement groove (110) and is spaced apart from the bottom protective plate (300), and the end face of the pressure sensor (400) facing the bottom protective plate (300) is flush with the end face of the base (100) facing the bottom protective plate (300).

2. A testing device for a bottom protection plate of a battery pack according to claim 1.

11. The base (100) is provided with a wiring groove (120) whose one end communicates with the measurement groove (110) and whose other end penetrates to one edge of the base (100).

2. A testing device for a bottom protection plate of a battery pack according to claim 1.

12. The plastic deformation member (500) is filled in the measurement groove (110) and is provided at a distance from the bottom protective plate (300), and the end face facing the bottom protective plate (300) is flush with the end face of the base (100) facing the bottom protective plate (300).

2. A testing device for a bottom protection plate of a battery pack according to claim 1.

13. The base (100) having a plurality of first mounting holes (130) and the spacer block (600) having a plurality of second mounting holes (610) corresponding to the first mounting holes (130) are detachably connected, and the bottom protective plate (300) has third mounting holes (310) corresponding to the first mounting holes (130) and the second mounting holes (610), respectively.

13. A testing device for a bottom protection plate of a battery pack according to any one of claims 1 to 12.

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