Thermal runaway testing fixture for lithium battery modules

Abstract

This utility model relates to the field of battery testing technology, specifically to a thermal runaway testing fixture for lithium battery modules, comprising: a support component, the upper surface of which forms a support surface for supporting the lithium battery module; the width direction of the support component is defined as a first direction, and the length direction as a second direction; and a pair of support rods connected to the support surface of the support component. The thermal runaway testing fixture proposed in this utility model consists of a support structure composed of the support component, support rods, and a crossbar. A probe structure is connected to the crossbar. Since the relative positions of the support rods and the support component, the relative positions of the crossbar and the support rods can be changed, and the position of the probe structure can also change relative to the crossbar, it can be adjusted for different trigger cell positions of lithium battery modules of different sizes, meeting different testing requirements. It does not require specific fixture design and has good adaptability.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and more specifically to a thermal runaway testing fixture for lithium battery modules. Background Technology

[0002] Thermal runaway testing is a crucial test in lithium-ion battery safety assessment. Its purpose is to simulate the situation where, under runaway conditions, the internal heat of a lithium-ion battery cannot dissipate quickly enough, leading to a rapid increase in battery temperature and accelerated heat diffusion, potentially causing more serious safety incidents. Through thermal runaway testing, the safety performance of a battery under these extreme conditions can be evaluated, which is of great significance for the research and development and production of lithium-ion batteries.

[0003] Thermal runaway tests are typically conducted using overcharging and heating methods. Overheating tests involve using an external heating device to bring the battery to or beyond its normal operating temperature limit, monitoring temperature and voltage changes under overheating conditions, and identifying any abnormalities such as gas leaks or fires. Overcharge tests simulate situations where the battery's voltage or current exceeds the normal range during charging, charging the battery to a level exceeding its design capacity and observing whether thermal runaway occurs.

[0004] For the aforementioned thermal runaway test, existing solutions require different tooling for different battery packs or modules, and custom tooling has a long cycle and high cost. Utility Model Content

[0005] To address the technical problems existing in the testing fixtures for lithium battery modules in the prior art, this utility model proposes a thermal runaway testing fixture for lithium battery modules, comprising:

[0006] A support component, wherein the upper surface of the support component forms a support surface for supporting the lithium battery module, and the width direction of the support component is defined as a first direction and the length direction as a second direction;

[0007] A pair of support rods are connected to the support surface of the support member, and each of the support rods is perpendicular to the support surface of the support member;

[0008] A crossbar is connected to the support rod and remains parallel to the support surface of the support component;

[0009] A probe component, connected to the crossbar, is used to provide a predetermined current to the lithium battery module located above the support surface;

[0010] Specifically, along the second direction, the support rod can change its position relative to the support component; along the first direction, the probe component can change its position relative to the crossbar; and along the length direction of the support rod, the crossbar can change its position relative to the support rod.

[0011] Preferably, the supporting component includes a frame structure, the frame structure including an outer frame and supporting ribs disposed within the outer frame, and the supporting surface is formed by the upper end surfaces of the outer frame and the supporting ribs.

[0012] Preferably, the outer frame is constructed as a rectangular frame.

[0013] Preferably, the supporting ribs are arranged on the inner side of the outer frame along a first direction or a second direction.

[0014] Preferably, the upper surface of the outer frame is provided with a groove, and the support rod is detachably connected to the groove.

[0015] Preferably, the support component comprises multiple aluminum profiles spliced ​​together, the support rod and the crossbar are both aluminum profiles, the support rod is fixedly connected to the support component by a first angle bracket, and the crossbar is fixedly connected to the support rod by a second angle bracket.

[0016] Preferably, the probe component includes a probe fixing plate, a probe fastening bolt, and a probe. The probe fixing plate is detachably connected to the support rod, and the probe is fixed to the probe fixing plate by the probe fastening bolt.

[0017] Preferably, the probe fixing plate is movable relative to the support rod along its length.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] The thermal runaway test proposed in this utility model consists of a support structure composed of a support component, a support rod, and a crossbar. The probe structure is connected to the crossbar. Since the relative positions between the support rod and the support component can be changed, the relative positions between the crossbar and the support rod can also be changed, and the position of the probe structure relative to the crossbar can also be changed, it can be adjusted for different trigger cell positions of lithium battery modules of different sizes to meet different testing requirements. It does not require specific tooling design and has good adaptability. Attached Figure Description

[0020] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of the lithium battery module shown in this utility model placed in a thermal runaway test fixture;

[0022] Figure 2This is a schematic diagram of the structure of the thermal runaway test fixture for lithium battery modules shown in this utility model. Detailed Implementation

[0023] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0024] Combination Figure 1 and Figure 2 As shown, this utility model proposes a thermal runaway testing fixture for lithium battery modules, including a support component 10, a pair of support rods 20, a crossbar 30, and a probe component 40.

[0025] The upper surface of the support member 10 forms a support surface for supporting the lithium battery module. A pair of support rods 20 are connected to the support surface of the support member 10, and each support rod 20 is perpendicular to the support surface of the support member 10. A crossbar 30 is connected to the support rods 20 and remains parallel to the support surface of the support member 10.

[0026] Thus, the support structure of the tooling is formed by the support component 10, the support rod 20 and the crossbar 30. The probe component 40 is connected to the crossbar 30 and is used to provide a predetermined current to the lithium battery module located above the support surface.

[0027] It should be understood that, for different lithium battery modules, due to their different sizes, the positions of the trigger cells on the surface of the battery pack are different. The probe component 40 should have a high degree of freedom, that is, it can be moved to any position above lithium battery modules of different sizes to meet the testing requirements.

[0028] The width direction of the support member 10 is defined as the first direction, and the length direction is defined as the second direction. Along the second direction, the support rod 20 can change its position relative to the support member 10. Along the first direction, the probe member 40 can change its position relative to the crossbar 30. Along the length direction of the support rod 20, the crossbar 30 can change its position relative to the support rod 20.

[0029] Thus, based on the position of the trigger cell on the lithium battery module, the lithium battery module is supported by the support component 10 without the need for precise positioning. Then, the support rod 20 is moved to the position corresponding to the trigger cell in the second direction, and the position of the probe component 40 on the crossbar 30 is adjusted so that the probe component 40 corresponds to the position of the trigger cell in the first direction. Finally, the crossbar 30 is moved so that it corresponds to the position of the trigger cell in the height direction. A suitable current can be provided to the lithium battery module through the probe component 40.

[0030] Thus, for lithium battery modules of different sizes and trigger cell positions, the tooling can be used to align the probe component 40 and the trigger cell according to the above steps, without the need to redesign the tooling based on the module to be tested.

[0031] In an optional embodiment, the support member 10 includes a frame structure, which includes an outer frame 11 and a support rib 12 disposed within the outer frame 11, with the upper surfaces of the outer frame 11 and the support rib 12 forming a support surface.

[0032] Preferably, since lithium battery modules are typically rectangular, the outer frame 11 is constructed as a rectangular frame. Furthermore, the support ribs 12 are arranged along a first direction or a second direction on the inner side of the outer frame 11.

[0033] Thus, the frame structure formed by the outer frame 11 and the supporting ribs 12 includes multiple closed rectangular structures, which can provide good support for the lithium battery module.

[0034] To facilitate the installation of the support rod 20 above the outer frame 11, a groove is provided on the upper surface of the outer frame 11, and the support rod 20 can be detachably connected to the groove.

[0035] Combination Figure 2 As shown, the support component 10 includes multiple aluminum profiles spliced ​​together. The support rod 20 and the crossbar 30 are both aluminum profiles. The support rod 20 is fixedly connected to the support component 10 through the first corner bracket 21, and the crossbar 30 is fixedly connected to the support rod 20 through the second corner bracket 31.

[0036] Thus, the support rod 20 and the support component 10 can be fixed and removed by simply assembling and disassembling the first corner bracket 21, and can be installed in a suitable position as needed. Similarly, the crossbar 30 and the support rod 20 can also be disassembled and assembled by assembling and disassembling the second corner bracket 31 to change their height position.

[0037] Combination Figure 2 As shown, the probe component 40 includes a probe fixing plate 41, a probe fastening bolt 42, and a probe 43. The probe fixing plate 41 is detachably connected to the support rod 20, specifically by bolt connection. The probe 43 is fixed to the probe fixing plate 41 by the probe fastening bolt 42.

[0038] The probe fixing plate 41 can move relative to the support rod 20 along its length.

[0039] like Figure 2 As shown, the probe component 40 has a pair of probe fixing plates 41, probe fastening bolts 42 and probes 43. The two probes 43 can change the relative spacing between them so that they can correspond to the trigger cell position in the lithium battery module.

[0040] In conjunction with the above embodiments, the thermal runaway test proposed by this utility model consists of a support structure composed of a support component, a support rod, and a crossbar. The probe structure is connected to the crossbar. Since the relative positions between the support rod and the support component can be changed, the relative positions between the crossbar and the support rod can be changed, and the position of the probe structure can also change relative to the crossbar, it can be adjusted for different trigger cell positions of lithium battery modules of different sizes, meet different testing requirements, does not require specific tooling design, and has good adaptability.

[0041] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A thermal runaway testing fixture for lithium battery modules, characterized in that, include: A support component (10) is provided, the upper surface of which forms a support surface for supporting the lithium battery module. The width direction of the support component (10) is defined as the first direction, and the length direction is defined as the second direction. A pair of support rods (20) are connected to the support surface of the support member (10), and each of the support rods (20) is perpendicular to the support surface of the support member (10); A crossbar (30) is connected to the support rod (20) and remains parallel to the support surface of the support member (10); A probe component (40) is connected to the crossbar (30) and is used to provide a predetermined current to the lithium battery module located above the support surface; In the second direction, the support rod (20) can change its position relative to the support member (10); in the first direction, the probe member (40) can change its position relative to the crossbar (30); and along the length of the support rod (20), the crossbar (30) can change its position relative to the support rod (20).

2. The thermal runaway testing fixture for lithium battery modules according to claim 1, characterized in that, The support component (10) includes a frame structure, which includes an outer frame (11) and a support rib (12) disposed within the outer frame (11). The upper surfaces of the outer frame (11) and the support rib (12) constitute the support surface.

3. The thermal runaway testing fixture for lithium battery modules according to claim 2, characterized in that, The outer frame (11) is constructed as a rectangular frame.

4. The thermal runaway testing fixture for lithium battery modules according to claim 2, characterized in that, The supporting ribs (12) are arranged on the inner side of the outer frame (11) along the first direction or the second direction.

5. The thermal runaway testing fixture for lithium battery modules according to claim 2, characterized in that, The upper surface of the outer frame (11) is provided with a groove, and the support rod (20) is detachably connected to the groove.

6. The thermal runaway testing fixture for lithium battery modules according to claim 1, characterized in that, The support component (10) includes multiple aluminum profiles spliced ​​together. The support rod (20) and the crossbar (30) are both aluminum profiles. The support rod (20) is fixedly connected to the support component (10) through a first corner bracket (21), and the crossbar (30) is fixedly connected to the support rod (20) through a second corner bracket (31).

7. The thermal runaway testing fixture for lithium battery modules according to claim 1, characterized in that, The probe component (40) includes a probe fixing plate (41), a probe fastening bolt (42), and a probe (43). The probe fixing plate (41) is detachably connected to the support rod (20), and the probe (43) is fixed to the probe fixing plate (41) by the probe fastening bolt (42).

8. The thermal runaway testing fixture for lithium battery modules according to claim 7, characterized in that, The probe fixing plate (41) can move relative to the support rod (20) along its length.

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