Testing device for lithium battery thermal diffusion test

Abstract

The utility model relates to the technical field of lithium battery preparation, and discloses a lithium battery thermal diffusion test device which comprises a test board, an electric control box is arranged on one side of the test board, a heating sheet is arranged in the middle of the upper end of the test board, and battery assemblies are arranged on the two sides of the heating sheet. According to the technical scheme, the two positioning frames can move towards the middle part simultaneously, so that the battery assembly and the heating plate are pressed and limited together, the thermal diffusion test of the lithium battery is facilitated, the test effect of the lithium battery is further ensured, and the lithium battery can be positioned in the positioning process of the lithium battery. The traction rope is released by the winding reel on the lead screw in a linkage manner, so that the arc-shaped cover plates lose traction force, and the two arc-shaped cover plates cover the upper part of the test board by virtue of the self weight of the balancing weight and the arc-shaped cover plates, so that a certain protection effect is achieved; and the condition of splashing of splashes generated by explosion of the lithium battery in the thermal diffusion test process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery preparation, in particular to a testing device for a lithium battery thermal diffusion test. Background Art

[0002] In recent years, with the gradual increase in the number of electric vehicles, safety issues of electric vehicles powered by lithium-ion batteries have frequently occurred. In addition to some fire and explosion accidents caused by failures in the electronic control system, there are more hidden dangers in the safety performance of the battery itself. However, when a battery pack with hundreds of batteries connected in series or parallel catches fire and explodes, the first abnormality is often only one or two of the batteries. When one of the batteries catches fire and explodes, the heat generated will quickly transfer to the surrounding batteries, causing a chain reaction of battery fires.

[0003] After searching, the publication number is (CN218601200U), which discloses a test device for a lithium battery thermal diffusion test, including a battery assembly, a clamp assembly for fixing the battery assembly and a heat dissipation assembly for dissipating heat from the battery assembly. A heat insulation plate is provided in the battery assembly, and the battery assembly and the clamp assembly are arranged on the heat dissipation assembly.

[0004] When implementing this technical solution, there are at least the following defects: although this utility model can perform a thermal diffusion test on a lithium battery, it is inconvenient to shield the splashes generated during the explosion of the lithium battery during the test, and it is inconvenient to limit the battery components in a linked manner, which urgently needs to be improved. Therefore, we propose a test device for a thermal diffusion test of a lithium battery. Utility Model Content

[0005] The utility model aims to provide a testing device for a lithium battery thermal diffusion test, which solves the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a test device for a lithium battery thermal diffusion test, comprising a test bench, an electric control box is arranged on one side of the test bench, a heating plate is arranged in the middle of the upper end of the test bench, battery assemblies are arranged on both sides of the heating plate, positioning frames are movably installed on both sides of the test bench, a screw rod is rotatably installed on the outer side of the test bench through a bearing, a winding reel is fixedly installed on one end of the screw rod, a hinged seat is fixedly installed on the upper end of the test bench, and an arc-shaped cover plate is rotatably installed on the upper end of the hinged seat.

[0007] By adopting the above technical solution, the lead screw can cooperate with the lead screw sleeve to drive the positioning frame to move towards the middle. The two positioning frames move towards the middle at the same time, so as to press and limit the battery assembly and the heating sheet together, thus facilitating the thermal diffusion test of the lithium battery and further ensuring the test effect on the lithium battery. Also, during the positioning process of the lithium battery, the winding cylinder on the lead screw can release the traction rope in a linkage manner, making the arc-shaped cover lose the traction force. Then, relying on the self-weight of the counterweight and the arc-shaped cover, the two arc-shaped covers can cover above the test bench. Coupled with the transparent high-explosion glass enclosure along the edge of the test bench, it can play a certain protective effect and reduce the splashing of the flying objects generated by the explosion of the lithium battery during the thermal diffusion test.

[0008] Optionally, a traction rope is wound around the outer side wall of the winding cylinder, and the other end of the traction rope is fixedly connected to the outer side of the arc-shaped cover.

[0009] By adopting the above technical solution, it is convenient to traction the arc-shaped cover through the traction rope, so as to rotate the arc-shaped cover.

[0010] Optionally, a lead screw sleeve is fixedly installed in the middle of the positioning frame, and the lead screw is in threaded connection with the lead screw sleeve.

[0011] By adopting the above technical solution, it is convenient to drive the positioning frame to move through the cooperation of the lead screw and the lead screw sleeve.

[0012] Optionally, one side of the positioning frame close to the battery assembly movably penetrates through the test bench.

[0013] By adopting the above technical solution, it is convenient to ensure the stability of the positioning frame, so as to limit the battery assembly.

[0014] Optionally, a counterweight is fixedly installed on the inner side of the arc-shaped cover, and the counterweights are symmetrically arranged.

[0015] By adopting the above technical solution, it is convenient to drive the arc-shaped cover to rotate downward through the setting of the counterweight, and the self-weight of the counterweight can reduce the flipping of the arc-shaped cover caused by the explosion impact force.

[0016] Optionally, the length of the arc-shaped cover is greater than half of the length of the test bench.

[0017] By adopting the above technical solution, it is convenient to ensure the covering effect of the arc-shaped cover.

[0018] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:

[0019] The technical solution of this application, through the test bench, electric control box, battery assembly, positioning frame, lead screw, traction rope, arc-shaped cover plate and counterweight block set, can not only make the lead screw cooperate with the lead screw sleeve to drive the positioning frame to move towards the middle, and the two positioning frames move towards the middle at the same time, so as to press and limit the battery assembly and the heating sheet together, thus facilitating the thermal diffusion test of lithium batteries and further ensuring the test effect on lithium batteries. Also, during the positioning process of the lithium battery, the winding drum on the lead screw can release the traction rope in a linkage manner, so that the arc-shaped cover plate loses the traction force, and then relying on the self-weight of the counterweight block and the arc-shaped cover plate, the two arc-shaped cover plates can cover the upper part of the test bench, and then cooperate with the transparent high-explosion glass enclosure on the edge of the test bench, thus playing a certain protective effect and reducing the situation of splashing of the flying objects generated by the explosion of the lithium battery during the thermal diffusion test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present utility model will become more obvious:

[0021] Figure 1 It is a schematic diagram of the overall structure of a test device for thermal diffusion test of lithium batteries of the present utility model;

[0022] Figure 2 It is a partial enlarged schematic diagram of part A of a test device for thermal diffusion test of lithium batteries of the present utility model.

[0023] In the figure: 1, test bench; 11, electric control box; 12, heating sheet; 13, battery assembly; 2, positioning frame; 21, lead screw sleeve; 22, lead screw; 23, winding drum; 24, traction rope; 3, arc-shaped cover plate; 4, hinge seat; 5, counterweight block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Please refer to Figure 1-2, the present utility model provides a technical solution: a test device for lithium battery thermal diffusion test, including a test bench 1, an electric control box 11 is arranged on one side of the test bench 1, a heating sheet 12 is arranged in the middle of the upper end of the test bench 1, battery assemblies 13 are arranged on both sides of the heating sheet 12, positioning frames 2 are movably installed on both sides of the test bench 1, a lead screw 22 is rotatably installed on the outside of the test bench 1 through a bearing, a winding drum 23 is fixedly installed at one end of the lead screw 22, a hinge seat 4 is fixedly installed on the upper end of the test bench 1, an arc-shaped cover plate 3 is rotatably installed on the upper end of the hinge seat 4, and one side of the positioning frame 2 close to the battery assembly 13 movably penetrates through the test bench 1, which is convenient to ensure the stability of the positioning frame 2, so as to limit the battery assembly 13. A counterweight block 5 is fixedly installed on the inner side of the arc-shaped cover plate 3, and the counterweight blocks 5 are symmetrically arranged, which is convenient to drive the arc-shaped cover plate 3 to rotate downward through the arrangement of the counterweight blocks 5, and the self-weight of the counterweight blocks 5 can reduce the flipping of the arc-shaped cover plate 3 caused by the explosion impact force. The length of the arc-shaped cover plate 3 is greater than half of the length of the test bench 1, which is convenient to ensure the covering effect of the arc-shaped cover plate 3.

[0025] A traction rope 24 is wound around the outer side wall of the winding drum 23, and the other end of the traction rope 24 is fixedly connected to the outer side of the arc-shaped cover plate 3, which is convenient to traction the arc-shaped cover plate 3 through the traction rope 24, so as to rotate the arc-shaped cover plate 3.

[0026] A lead screw sleeve 21 is fixedly installed in the middle of the positioning frame 2, and the lead screw 22 is in threaded connection with the lead screw sleeve 21, which is convenient to drive the positioning frame 2 to move through the cooperation of the lead screw 22 and the lead screw sleeve 21.

[0027] During the test, first place the separated battery assemblies 13 on the test bench 1, and at the same time place the heating sheet 12 in the middle of the test bench 1. Then rotate the lead screw 22, and the lead screw 22 cooperates with the lead screw sleeve 21 to drive the positioning frames 2 to move towards the middle. The two positioning frames 2 move towards the middle at the same time, so as to press and limit the battery assemblies 13 and the heating sheet 12 together, which is convenient to carry out the lithium battery thermal diffusion test and further ensure the test effect on the lithium battery. At the same time, during the positioning process of the lithium battery, the winding drum 23 on the lead screw 22 releases the traction rope 24 in a linked manner, so that the arc-shaped cover plate 3 loses the traction force. Then, relying on the self-weight of the counterweight blocks 5 and the arc-shaped cover plate 3, the two arc-shaped cover plates 3 cover the upper part of the test bench 1. Coupled with the transparent high-explosion glass enclosure on the edge of the test bench 1, it can play a certain protective role and reduce the situation of splashing of the flying objects generated by the explosion of the lithium battery during the thermal diffusion test.

Claims

1. A test device for a lithium battery thermal diffusion test, comprising a test bench (1), characterized in that: On one side of the test bench (1), an electric control box (11) is provided. In the middle of the upper end of the test bench (1), a heating sheet (12) is provided. On both sides of the heating sheet (12), battery assemblies (13) are provided. On both sides of the test bench (1), positioning frames (2) are movably installed. On the outside of the test bench (1), a lead screw (22) is rotatably installed through a bearing. One end of the lead screw (22) is fixedly installed with a wire winding cylinder (23). On the upper end of the test bench (1), a hinge seat (4) is fixedly installed. On the upper end of the hinge seat (4), an arc-shaped cover plate (3) is rotatably installed.

2. The test device for the thermal diffusion test of a lithium battery according to claim 1, wherein: A traction rope (24) is wound around the outer side wall of the wire winding cylinder (23), and the other end of the traction rope (24) is fixedly connected to the outer side of the arc-shaped cover plate (3).

3. The test device for the thermal diffusion test of a lithium battery according to claim 1, characterized in that: In the middle of the positioning frame (2), a lead screw sleeve (21) is fixedly installed, and the lead screw (22) is threadedly connected to the lead screw sleeve (21).

4. The test device for a lithium battery thermal diffusion test according to claim 1, characterized in that: One side of the positioning frame (2) close to the battery assembly (13) movably penetrates through the test bench (1).

5. The test device for a lithium battery thermal diffusion test according to claim 1, wherein: On the inner side of the arc-shaped cover plate (3), a counterweight block (5) is fixedly installed, and the counterweight blocks (5) are symmetrically arranged.

6. The test device for a lithium battery thermal diffusion test according to claim 1, characterized in that: The length of the arc-shaped cover plate (3) is greater than half of the length of the test bench (1).

Images