Testing device for the bottom protective plate of a 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 the priority of a Chinese patent application with an application number of 202421699147.X, which was filed with the Chinese Patent Office on July 17, 2024, and all the contents of the above application are incorporated herein by reference.

[0002] This 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 Art

[0003] With the rapid development of the new energy battery industry, the safety requirements for batteries are also increasing. In the long-term use of electric vehicle battery packs, the physical strength, impact resistance, and shock resistance of the battery packs become increasingly important. A large number of commercially available new energy vehicles have incidents of battery pack ignition due to bottom rubbing, posing a serious danger to the lives and property safety of drivers and passengers. Therefore, the bottom protection plate of the battery pack is particularly important.

[0004] For new energy battery packs, there is no national standard for the protection of the bottom protection plate for the time, and mainly based on the overall specifications of the battery pack, the main tests are carried out.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The test cost at the level of the entire battery pack is very high, the efficiency is low, the economic cost and time cost of the test are too high, and it is not applicable to the test of a large amount of materials. Furthermore, it is difficult for the overall test of the battery pack to individually reflect the performance such as the impact resistance and distortion resistance of the bottom protection plate, which is disadvantageous for the preliminary design of the bottom protection plate of the battery pack.

Means for Solving the Problems

[0006] This application provides a testing apparatus for the bottom protective plate of a battery pack that enables testing of the impact resistance and distortion resistance of the bottom protective plate, and enables the quantification of the strength performance design parameters and standards of the bottom protective plate.

[0007] The present invention provides a test apparatus for the bottom protective plate of a battery pack, comprising a base and a test mechanism. The base is configured to support the bottom protective plate and is provided with a measuring groove containing a pressure sensor and a plastic deformation member, as well as a spacer block. The bottom protective plate and the base are spaced apart via the spacer block to form an impact chamber, and the measuring groove is located within the impact chamber. The test 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 positioned directly above the base. [Effects of the Invention]

[0008] The beneficial effects of the present invention are as follows. In the battery pack bottom protective plate testing apparatus of the present invention, a spacer block is attached to the base, and then the bottom protective plate awaiting testing is placed on the spacer block, so that the bottom protective plate is spaced apart from the base plate via the spacer block and an impact chamber is formed. Then, the impact component is lifted by a test stand provided on one side of the base and positioned directly above the base, that is, the impact component is positioned directly above the bottom protective plate, so that the impact component drops vertically from the test stand and performs an impact collision test against the bottom protective plate. During the testing process, multiple bottom protective plates of unified specifications are prepared for testing. Pressure sensors and plastic deformation members are placed in the measurement grooves of the bases, respectively. The pressure sensors measure the corresponding impact force values, and the plastic deformation members measure the strain value of the bottom protective plate after impact. This allows for the realization of impact test data for the bottom protective plate, which is advantageous for data quantification. Based on the corresponding test data, it is easy to design the strength specifications and selection of the bottom protective plate for the corresponding battery pack. This ensures that the bottom protective plate can provide sufficient support and impact resistance to the battery pack in actual application, thereby guaranteeing the safety of the battery pack during use. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram of the structure of a test apparatus for a bottom protective plate of a battery pack according to one embodiment of the present invention. [Figure 2] This is a schematic diagram of the structure of a base according to one embodiment of the present invention. [Figure 3] This is a schematic diagram of the structure of the bottom surface of a base according to one embodiment of the present invention. [Figure 4] This is a schematic diagram of the structure of a pressure sensor according to one embodiment of the present invention. [Figure 5] This is a schematic diagram of the structure of a support vertical bar according to one embodiment of the present invention. [Figure 6] This is a schematic diagram illustrating the connection between an impact component and a support crossbar according to one embodiment of the present invention. [Figure 7] This is a schematic diagram of the structure of a test apparatus for a bottom protective plate of another battery pack according to one embodiment of the present invention. [Figure 8] This is a schematic diagram of the structure of a test apparatus for a bottom protective plate of another battery pack according to one embodiment of the present invention. [Modes for carrying out the invention]

[0010] The present application will be described in more detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are merely for interpretation purposes and do not limit the present application. Furthermore, for the sake of clarity, the drawings show only a portion of the structure relevant to the present application, not all of it.

[0011] In the description of this application, unless otherwise explicitly provided and limited, the terms “connected,” “connected,” and “fixed” should be understood in a broad sense. For example, they may be fixed connections, detachable connections, or integrated, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate mediator, or internal communication between two elements or an interaction between two elements. A person skilled in the art will understand the meaning of these terms in this application depending on the context.

[0012] In this application, unless otherwise explicitly provided and limited, the presence of a first feature "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features via other features between them, without direct contact. Furthermore, the presence of a first feature "above," "above," and "on the top surface" of a second feature may include the first feature being directly above and diagonally above the second feature, or indicating that the horizontal height of the first feature is greater than that of the second feature. The presence of a first feature "below," "below," and "on the bottom surface" of a second feature may include the first feature being directly below and diagonally below the second feature, or indicating that the horizontal height of the first feature is lower than that of the second feature.

[0013] In the description of this embodiment, terms such as "up," "down," and "right" refer to directions or positional relationships based on the directions or positional relationships shown in the drawings. These terms are merely for the purpose of facilitating explanation and simplifying operation, and do not indicate or imply that the devices or elements mentioned have a specific direction, or that they must be configured and operated in a specific direction. Therefore, they should not be understood as limiting this application. Furthermore, the terms "first" and "second" are merely for the purpose of distinction in the explanation and do not carry any special meaning.

[0014] As shown in Figures 1 to 6, the test apparatus for the bottom protective plate of the battery pack in this embodiment comprises a base 100 and a test mechanism 200. The base 100 is configured to support the bottom protective plate 300 and is provided with a measuring 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 via the spacer block 600 to form an impact chamber, with the measuring groove 110 located within the impact chamber. The test mechanism 200 comprises a test stand 210 and an impact component 220. The test stand 210 and the impact component 220 are provided 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, the spacer block 600 is attached to the base 100, and then the bottom protective plate 300 awaiting testing is placed on the spacer block 600. This creates an impact chamber where the bottom protective plate 300 is spaced apart from the base plate via the spacer block 600. The impact component 220 is then lifted by a test stand 210 provided on one side of the base 100 and positioned directly above the base 100, that is, directly above the bottom protective plate 300. This causes the impact component 220 to drop vertically from the test stand 210 and perform an impact collision test against the bottom protective plate 300. During the testing process, multiple bottom protective plates 300 of the same specifications are prepared for testing. Pressure sensors 400 and plastic deformation members 500 are placed in the measurement grooves 110 of the base 100, respectively. The pressure sensor 400 measures the corresponding impact force value, and the plastic deformation member 500 measures the strain value of the bottom protective plate 300 after impact. This allows for impact test data for the bottom protective plate 300, which is advantageous for data quantification. Based on the corresponding test data, it is easy to design the strength specifications and selection of the bottom protective plate 300 for the corresponding battery pack. This ensures that the bottom protective plate 300 can provide sufficient support and impact resistance to the battery pack in actual application, thereby guaranteeing the safety of the battery pack during use.

[0016] In one embodiment, the test mechanism 200 further comprises a base 230, which is provided on the other side of the pedestal 100, and the test stand 210 is detachably attached to the base 230. This allows for easy and flexible handling of testing multiple types of bottom protective plates 300 by easily replacing the test stand 210 with different specifications according to the testing requirements of different bottom protective plates 300, thus providing high versatility.

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

[0018] In one embodiment, the test stand 210 includes two supporting vertical rods 211. Both ends of the supporting horizontal rod 212 are respectively connected to the two supporting vertical rods 211, forming a U-shaped test stand 210. The impact component 220 is suspended on the supporting horizontal rod 212 of the U-shaped test stand 210 and positioned directly above the pedestal 100 so that the impact component 220 falls vertically to conduct an impact test on the bottom protection plate 300 on the pedestal 100.

[0019] In one embodiment, as shown in FIG. 7, the test stand 210 includes one supporting vertical rod 211. One end of the supporting horizontal rod 212 is connected to the supporting vertical rod 211, and the test stand 210 has a Γ-shaped structure, that is, an inverted L-shaped structure. The impact component 220 is suspended on the end of the supporting horizontal rod 212 away from the supporting vertical rod 211 and positioned directly above the pedestal 100 so that the impact component 220 falls vertically to conduct an impact test on the bottom protection plate 300 on the pedestal 100.

[0020] In one embodiment, as shown in FIG. 8, the test stand 210 includes one supporting vertical rod 211. The supporting horizontal rod 212 is formed into an arc-shaped bent structure, and both ends are connected to the supporting vertical rod 211 and are located at the same horizontal height. The impact component 220 is suspended at a position on the supporting horizontal rod 212 facing the supporting vertical rod 211 and positioned directly above the pedestal 100 so that the impact component 220 falls vertically to conduct an impact test on the bottom protection plate 300 on the pedestal 100.

[0021] To ensure the stability of the test stand 210, reinforcing rib structures 240 are provided at both the connection locations between the supporting vertical rods 211 and the base 230 and the connection locations between the supporting vertical rods 211 and the supporting horizontal rods 212, thereby ensuring the overall stability of the test stand 210 and further ensuring the stability of the entire test operation.

[0022] In one embodiment, the support vertical bar 211 comprises a fixed bar 211a and a movable bar 211b, the fixed bar 211a being fixedly connected to the base 230, and the movable bar 211b being retractably connected at one end to the fixed bar 211a and fixedly connected at the other end to the support horizontal bar 212. During the testing process, the movable bar 211b is adjusted to extend and retract at the fixed bar 211a according to the required impact amount, according to the laws of energy, so that the impact component 220 reaches a corresponding impact amount on the bottom protective plate 300 when it falls vertically, and the height of the support horizontal bar 212 is adjusted, i.e., the height of the impact component 220 suspended from the support horizontal bar 212 is adjusted, thereby obtaining the impact force value and strain value of the bottom protective plate 300 at a specific impact amount.

[0023] The vertical support rod 211 is provided with a height scale 2111, which may be provided on each of the fixed rod 211a and the movable rod 211b, or only on the movable rod 211b. This allows for accurate determination of the height of the horizontal support rod 212 connected to the movable rod 211b, i.e., the height of the impact component 220, when adjusting the movable rod 211b to move relative to the fixed rod 211a, and for corresponding adjustment of the height of the impact component 220 based on a 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 hole 2112. After the movable rod 211b moves to a position corresponding to the fixed rod 211a, a fixing member such as an insertion pin 2114 is passed through the first positioning hole 2112 and the second positioning holes 2113 to fix and position the movable rod 211b and the fixed rod 211a, thereby holding the support crossbar 212 connected to the movable rod 211b and the impact component 220 suspended from the support crossbar 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 being inserted into the impact carrier 221 in 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 section 2221.

[0025] In one embodiment, the test stand 210 is provided with a pulley 213, and the impact component 220 is suspended from the test stand 210 by being connected to the pulley 213 via a connecting rope 214. By being connected to the pulley 213, the impact component 220 is slidable via the connecting rope 214, and the pulley 213 can perform a certain positional restraint when the impact component 220 is dropped vertically, ensuring that the impact component 220 is dropped vertically along the rolling groove of the pulley 213 via the connecting rope 214, which is advantageous in avoiding displacement of the impact component 220 during the drop process. Furthermore, by being connected to the pulley 213, the impact component 220 is dropped vertically while maintaining a smooth drop, and at the same time, energy loss during the drop process is reduced, the impact on the test results is reduced, and the accuracy of the test results is guaranteed.

[0026] In one embodiment, the pressure sensor 400 is placed in the measuring groove 110 and spaced apart 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. This leaves a certain width of deformation within the impact chamber after the bottom protective plate 300 is subjected to impact, simulating the actual situation in which the battery module receives the impact force transmitted from the bottom protective plate 300 when the bottom protective plate 300 is subjected to impact. This makes the impact force value transmitted to the battery module when the bottom protective plate 300 is subjected to impact, obtained in the test, 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 a measuring groove 110, and the other end which penetrates to one side edge of the base 100, thereby mounting the pressure sensor 400 in the measuring groove 110, and the connection wire 410 of the pressure sensor 400 is routed to the outside of the base 100 by the wiring groove 120 and can be connected to a data terminal or control terminal to enable data transmission and recording. By providing the wiring groove 120 in the base 100, interference of the connection wire 410 of the pressure sensor 400 with the flatness of the base 100 can be avoided, the base 100 can be kept horizontally placed, and the accuracy of the test can be improved.

[0028] In one embodiment, the plastic deformation member 500 is filled into the measuring groove 110 and 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. This simulates the actual situation in which the battery module receives the impact force transmitted from the bottom protective plate 300 when the bottom protective plate 300 is subjected to impact, thereby obtaining the degree of influence of the deformation value of the bottom protective plate 300 after impact on the battery module in the actual situation and improving the accuracy of the test. In actual operation, the plastic deformation member 500 is made of ultralight clay, which is soft, highly moldable, and can accurately and effectively represent the amount of strain of the bottom protective plate 300. Furthermore, the ultralight clay is reusable, safe, and environmentally friendly. Of course, in addition to the embodiment, other plastic deformation members 500 such as plastic deformation rubber may be used, as long as the measurement and reflection of the amount of strain of the bottom protective plate 300 can be achieved by the plastic deformation of the plastic deformation member 500, and such designs all fall within the scope of protection of this 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 provided with a third mounting hole 310 which is normally attached to and connected to the battery pack case, thereby enabling the bottom protective plate 300 to be attached to and fixed to the base 100 and the spacer block 600 by providing corresponding first mounting holes 130 and second mounting holes 610 based on the third mounting hole 310 in the bottom protective plate 300 and corresponding to the position of the third mounting hole 310.

[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 surface, and the third mounting holes 310 are provided along the edges of the four sides of the bottom protective plate 300. The spacer block 600 is bent in a circular shape so that the second mounting hole 610 corresponds to the third mounting hole 310, and the first mounting hole 130 in the base is also provided corresponding to the second mounting hole 610 and the third mounting hole 310, thereby ensuring the attachment and fixing of the bottom protective plate 300, the spacer block 600 and the base 100.

[0031] Since the base 100 is provided with first mounting holes 130 arranged in a circular array in multiple groups, the bottom protective plate 300 can be attached by using one group of first mounting holes 130 according to the size of the bottom protective plate 300 of different specifications, and the spacer block 600 of the 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 of different specifications, which is advantageous in reducing production costs. [Explanation of Symbols]

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

Claims

1. A base (100) is provided on which a bottom protective plate (300) is placed, and a measuring groove (110) in which a pressure sensor (400) or a plastic deformation member (500) is provided, and a spacer block (600) is provided, and the impact chamber is formed by spacing the bottom protective plate (300) and the spacer block (600), with the measuring groove (110) located within the impact chamber, The test mechanism (200) comprises 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 located directly above the base (100), wherein the pressure sensor (400) is placed in the measuring groove (110) and spaced apart from the bottom protective plate (300), and the end face facing the bottom protective plate (300) is configured to be flush with the end face of the base (100) facing the bottom protective plate (300), or The plastic deformation member (500) is filled into the measuring groove (110) and provided at a distance from the bottom protective plate (300), and its end face facing the bottom protective plate (300) is configured to be flush with the end face of the base (100) facing the bottom protective plate (300). Testing apparatus for the bottom protective plate of a battery pack.

2. The test mechanism (200) further comprises a base (230) provided on the other side of the pedestal (100), to which the test stand (210) is detachably attached. A testing apparatus for the bottom protective plate of a battery pack as described in claim 1.

3. The test stand (210) comprises support vertical bars (211) connected to each other, and support horizontal bars (212) to which the impact component (220) is connected and which are connected to the support vertical bars (211), with one end of the support vertical bars (211) away from the support horizontal bars (212) being connected to the base (230). A testing apparatus for the bottom protective plate of a battery pack as described in claim 2.

4. The test stand (210) has a gate-shaped structure, with two vertical support bars (211) to which both ends of the horizontal support bar (212) are connected. A testing apparatus for the bottom protective plate of a battery pack as described in claim 3.

5. The test stand (210) comprises a vertical support bar (211) connected to one end of the horizontal support bar (212), and has a г-shaped structure. A testing apparatus for the bottom protective plate of a battery pack as described in claim 3.

6. The test stand (210) comprises one vertical support bar (211), and the horizontal support bar (212) is bent into an arc shape, with both ends connected to the vertical support bar (211) and positioned at the same horizontal height. A testing apparatus for the bottom protective plate of a battery pack as described in claim 3.

7. The support vertical bar (211) comprises a fixed bar (211a) fixedly connected to the base (230), and a movable bar (211b) whose one end is retractably connected to the fixed bar (211a) and whose other end is fixedly connected to the support horizontal bar (212). A testing apparatus for the bottom protective plate of a battery pack as described in claim 3.

8. The impact component (220) comprises an impact carrier (221) and an impact head (222) inserted into the impact carrier (221) in a direction toward the base (100), and having a hemispherical, conical, or frustoconical impact portion (2221) on the side toward the base (100). A testing apparatus for the bottom protective plate of a battery pack as described in 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). A testing apparatus for the bottom protective plate of a battery pack as described in claim 1.

10. The base (100) is provided with a wiring groove (120) whose one end communicates with the measuring groove (110) and whose other end penetrates to one side edge of the base (100). A testing apparatus for the bottom protective plate of a battery pack as described in claim 1.

11. The base (100) and the spacer block (600) are detachably connected, the base (100) is provided with a plurality of first mounting holes (130) corresponding to a third mounting hole (310) provided in the bottom protective plate (300), and the spacer block (600) is provided with a plurality of second mounting holes (610) corresponding to the first mounting holes (130) and the third mounting holes (310), respectively. A test apparatus for the bottom protective plate of a battery pack according to any one of claims 1 to 10.

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