Battery combustion test device

Abstract

The invention discloses a battery combustion test device, and particularly relates to the technical field of battery electrical variable measurement, and the battery combustion test device comprises a self-starting dry powder flame retardant uniform scattering mechanism and a shell; the self-starting type dry powder flame retardant uniform scattering mechanism comprises a guide sieve, a containing frame, a U-shaped connecting rod, a transmission plate, a pressure sensing plate and a self-adaptive power switching assembly. The guide sieve is fixed to the inner side end of the shell, the containing frame is installed above the guide sieve, scattering holes are formed in the guide sieve, and discharging holes are formed in the containing frame; one end of the U-shaped connecting rod is fixed with the transmission plate, and the other end is fixed with the upper end of the accommodating frame; the pressure sensing plate is installed at the bottom end of the shell in a sliding mode and serves as the power input end of the self-adaptive power switching assembly, and the transmission plate serves as the power output end of the self-adaptive power switching assembly. The battery combustion test device has the function of uniformly scattering the dry powder flame retardant when the to-be-tested battery is out of control in combustion and explosion, and has the advantage of controlling the discharging amount according to the combustion and explosion degree.

Description

Technical Field

[0001] This application relates to the technical field of measuring electrical variables of batteries, and particularly to a battery combustion test device. Background Art

[0002] Since batteries may cause combustion or even explosion under overcharging, short-circuiting, high temperature, etc., once a combustion or explosion accident occurs, it may lead to serious incidents such as fires and personal injury accidents. Therefore, batteries must undergo combustion tests before leaving the factory.

[0003] Currently, the safety standards of batteries are mainly specified in IEC 62133-1:2017 and IEC 62133-2:2017, covering parts such as safety performance tests, environmental adaptability tests, mechanical performance tests, and battery system requirements. Regarding the potential safety hazard problems encountered during the above tests, the same applicant disclosed a protective net for battery combustion tests and a battery combustion test device in the Chinese Utility Model Patent Application No. 202322591543.2. In this solution, a foldable protective net is arranged around the battery to be tested to prevent the splashing of battery fragments.

[0004] However, during the combustion test of batteries, when some unqualified batteries explode violently due to heat, their fragments may penetrate the test instrument, causing the fire to spread to the test environment. At this time, if the operator performs fire extinguishing operations, personal safety problems may occur due to continuous deflagration. Summary of the Invention

[0005] The present invention provides a battery combustion test device, which has the function of evenly spreading dry powder flame retardant when the battery to be tested explodes out of control, and has the advantage of controlling the discharge amount according to the degree of explosion.

[0006] The purpose of the present invention is achieved through the following technical solutions: A battery combustion test device includes a self-starting dry powder flame retardant spreading mechanism and a housing; The self-starting dry powder flame retardant spreading mechanism includes a guiding sieve, a receiving frame, a U-shaped connecting rod, a transmission plate, a pressure sensing plate, and an adaptive power switching component; the guiding sieve is fixed to the inner side end of the housing, the receiving frame is installed above the guiding sieve, the guiding sieve is provided with material spreading holes, and the receiving frame is provided with discharge holes; one end of the U-shaped connecting rod is fixed to the transmission plate, and the other end is fixed to the upper end of the receiving frame; the pressure sensing plate is slidably installed at the bottom end of the housing, the pressure sensing plate is the power input end of the adaptive power switching component, and the transmission plate is the power output end of the adaptive power switching component.

[0007] Among them, when the self-starting dry powder flame retardant spreading mechanism is driven and shaken, the dry powder flame retardant will fall into the spreading hole through the discharge hole, and then come into contact with the burning battery, thereby achieving the function of fire extinguishing and flame retardancy.

[0008] The pressure sensing plate is a mechanical sensing component designed in this solution, which is made of high-temperature resistant alloy material. It is installed at the bottom of the shell and connected to the force storage spring.

[0009] Preferably, the diameter of the material spreading hole is larger than that of the material discharging hole.

[0010] Preferably, the adaptive power switching assembly comprises a rotating motor, a rotating rod, a transmission wheel, a connecting rod, a power transmission wheel and a sliding block; The output end of the rotating motor and the rotating rod are rotated and transmitted, and a sliding groove is provided at the side end of the transmission wheel, in which a sliding block is slidably arranged, and the sliding block is fixed by a rod and a transmission plate; one end of the connecting rod is rotationally connected to the transmission wheel, and the other end is rotationally connected to the power transmission wheel; a deformation groove is provided on the transmission wheel for adapting the rotation rod to pass through, and the power transmission wheel is slidingly sleeved on the rotation rod.

[0011] Among them, the function of the adaptive power switching component is to use the impact force generated when the battery explodes as the power to drive the containing frame to slide above the guide screen, so that the dry powder flame retardant falls from the spreading hole onto the battery to be tested.

[0012] Preferably, a limiting rib is provided on the side end of the rotating rod, and correspondingly, a groove adapted for sliding of the limiting rib is provided on the power transmission wheel.

[0013] Preferably, the adaptive power switching assembly further comprises a shaft, and the transmission wheel is mounted on the rotating rod by flipping the shaft.

[0014] Preferably, the adaptive power switching component also includes a pulley, a screw, a rotating seat, a U-shaped slide rail, a rotating gear and a transmission tooth plate; one end of the screw is rotatably connected to the pulley, and the other end is fixed to the rotating gear, the transmission tooth plate is provided with meshing teeth, and the rotating gear and the meshing teeth are meshingly transmission connected; the transmission tooth plate and the pressure sensing plate are fixed; the side end of the power transmission wheel is provided with an annular groove for adapting the pulley to be embedded in the synchronous transmission; the rotating seat is fixed on the U-shaped slide rail, and the rotating seat is provided with a threaded hole that is threadedly fixed to the screw.

[0015] Preferably, the rotating rod is rotatably arranged on the side end of the U-shaped slide rail, and the end of the rotating rod and the output end of the rotating motor are synchronously driven by a transmission belt.

[0016] Preferably, the transmission plate is slidably mounted on the upper end of the U-shaped slide rail.

[0017] Preferably, the battery combustion test device further comprises a force storage spring, one end of which is fixed to the inner end of the shell, and the other end of which is fixed to the pressure sensing plate.

[0018] Preferably, a slider is provided at the inner end of the shell, and the free end of the slider is rotatably connected to an isolation shield, and the battery to be tested is placed in a cavity surrounded by the isolation shield and the guide screen.

[0019] Compared with the prior art, the advantages or beneficial effects of the technical solution of the present application include: 1. The aperture difference design between the guide screen and the containing frame (spreading hole > discharge hole), combined with the drive of the U-shaped connecting rod, enables the dry powder flame retardant to fall from the discharge hole during the lateral movement, and then fall from the spreading hole to the top of the battery to be tested.

[0020] 2. By setting up an adaptive power switching component, the impact force generated during the explosion of the battery to be tested can be converted into power for driving the lateral movement of the containment frame. Therefore, the dry powder flame retardant will only be released during the battery explosion process, and this process does not require manual intervention by the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the internal structure of a battery combustion test device; Figure 2 A schematic diagram of the internal structure of a battery combustion test device (side view); Figure 3 is a schematic diagram of the structure of an adaptive power switching component; Figure 4 for Figure 3 A magnified view of part A in FIG. Figure 5 The figure is a diagram of the overall structure of a battery combustion test device.

[0022] In the figure: 1, transmission plate, 2, U-shaped slide rail, 4, rotating seat, 5, screw, 6, rotating gear, 7, transmission tooth plate, 8, meshing teeth, 9, transmission wheel, 11, power transmission wheel, 12, pulley, 13, limiting rib, 14, shaft, 16, rotating rod, 17, sliding block, 18, rod, 19, connecting rod, 20, shell, 21, slider, 22, pressure sensing plate, 24, containing frame, 25, guide screen, 26, U-shaped connecting rod, 28, isolation baffle, 30, rotating motor, 31, storage spring. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present application applies technical means to solve technical problems and achieve corresponding technical effects can be fully understood and implemented accordingly. The embodiments of the present application and the various features in the embodiments can be combined with each other without conflict, and the technical solutions formed are all within the protection scope of the present application.

[0024] It should be clear that the embodiments described below are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by technicians in the relevant field without making creative work are within the scope of protection of the present application.

[0025] Example 1: This example describes in detail the scheme of the battery combustion test device: like Figures 1 - 5 As shown, a battery combustion test device includes a self-starting dry powder flame retardant uniform spreading mechanism and a housing 20; the self-starting dry powder flame retardant uniform spreading mechanism includes a guide screen 25, a containing frame 24, a U-shaped connecting rod 26, a transmission plate 1, a pressure sensing plate 22, a force storage spring 31 and an adaptive power switching assembly; the guide screen 25 is fixed to the inner side end of the housing 20, the containing frame 24 is installed above the guide screen 25, the guide screen 25 is provided with a material spreading hole, and the containing frame 24 is provided with a material discharging hole; the aperture of the material spreading hole is larger than the material discharging hole. One end of the U-shaped connecting rod 26 is fixed to the transmission plate 1, and the other end is fixed to the upper end of the containing frame 24; the pressure sensing plate 22 is slidably installed at the bottom end of the housing 20, the pressure sensing plate 22 is the power input end of the adaptive power switching assembly, and the transmission plate 1 is the power output end of the adaptive power switching assembly. One end of the force storage spring 31 is fixed to the inner side end of the housing 20, and the other end is fixed to the pressure sensing plate 22.

[0026] A slider 21 is disposed at the inner end of the housing 20 . The free end of the slider 21 is rotatably connected to an isolation shield 28 . The battery to be tested is placed in a cavity enclosed by the isolation shield 28 and the guide screen 25 .

[0027] The component composition and working principle of the self-starting dry powder flame retardant spreading mechanism are as follows: like Figures 1 - 5 As shown, the dry powder flame retardant is contained in the containing frame 24. When the transmission plate 1 is impacted by the battery explosion air or debris, it can drive the containing frame 24 to swing left and right above the guide screen 25 through the U-shaped connecting rod 26, so that the dry powder flame retardant falls out of the discharge hole until it falls from the spreading hole and contacts the battery explosion.

[0028] In the above process, since the dry powder flame retardant is pre-installed in the containing frame 24, and the aperture of the discharge hole is small and the distribution interval is also large, the dry powder flame retardant will hardly fall from the discharge hole in a static state (only a small part falls and has no effect). When the containing frame 24 is driven and shaken, the containing frame 24 begins to fall from the discharge hole (similar to the principle of sieving). The function of the guide screen 25 is to make the distribution of the dry powder flame retardant more uniform, and the discharge hole and the scattering hole are not corresponding, which can also prevent the dry powder flame retardant falling from the discharge hole from falling directly. The guide screen 25 also plays a role in preventing the dry powder flame retardant from falling onto the battery to be tested.

[0029] Embodiment 2: This embodiment is based on Embodiment 1, and specifically describes the power source of the receiving frame 24, specifically: The adaptive power switching assembly includes a pulley 12, a screw rod 5, a rotating seat 4, a U-shaped slide rail 2, a rotating gear 6 and a transmission tooth plate 7; one end of the screw rod 5 is rotatably connected to the pulley 12, and the other end is fixed to the rotating gear 6, and the transmission tooth plate 7 is provided with meshing teeth 8, and the rotating gear 6 and the meshing teeth 8 are meshed and connected; the transmission tooth plate 7 is fixed to the pressure sensing plate 22; the side end of the power transmission wheel 11 is provided with an annular groove adapted to fit the pulley 12 in the synchronous transmission; the rotating seat 4 is fixed to the U-shaped slide rail 2, and the rotating seat 4 is provided with a threaded hole screwed and fixed with the screw rod 5. The rotating rod 16 is rotatably arranged on the side end of the U-shaped slide rail 2, and the end of the rotating rod 16 and the output end of the rotating motor 30 are synchronously driven through the transmission belt.

[0030] The connection relationship and working principle of the components in the adaptive power switching assembly are as follows: like Figure 1 , Figure 3 and Figure 4 As shown, when the battery explodes, the organic solvent contained therein will decompose to produce a large amount of carbon monoxide or carbon dioxide, and during the combustion process, lithium salts will also decompose to produce gases such as hydrogen fluoride. When the pressure sensing plate 22 close to the battery to be tested slides with the bottom end of the shell 20, the transmission gear plate 7 is synchronously driven to slide. During the movement of the transmission gear plate 7, it can drive the rotating gear 6 that is meshed with it to rotate. During the rotation of the rotating gear 6, it will drive the screw 5 to rotate on the rotating seat 4, so that the end rotatably connected to it drives the power transmission wheel 11 to slide along the rotating rod 16. The purpose of this setting is to set the transmission wheel 9 obliquely, thereby changing the movement path of the sliding block 17, and then causing the transmission plate 1 to move left and right.

[0031] The transmission tooth plate 7 is directly fixed to the pressure sensing plate 22 through a rigid connector, and the sliding direction is completely consistent with the pressure sensing plate. The initial position of the pressure sensing plate is maintained by the force storage spring 31. When triggered by an external force, its sliding amount is positively correlated with the impact force, thereby matching the release requirements of flame retardants with different explosion intensities.

[0032] Embodiment 3: Based on Embodiment 2, this embodiment specifically describes the change of the movement path of the sliding block 17 caused by the movement between the power transmission wheel 11 and the transmission wheel 9, specifically: The adaptive power switching component includes a rotating motor 30, a rotating rod 16, a transmission wheel 9, a connecting rod 19, a power transmission wheel 11, and a sliding block 17; the output end of the rotating motor 30 is rotationally connected to the rotating rod 16, a sliding groove is provided on the side of the transmission wheel 9, the sliding block 17 is slidably arranged in the sliding groove, and the sliding block 17 is fixed to the transmission plate 1 through a rod 18; one end of the connecting rod 19 is rotatably connected to the transmission wheel 9, and the other end is rotatably connected to the power transmission wheel 11; a deformation groove adapted for the rotating rod 16 to pass through is provided on the transmission wheel 9, and the power transmission wheel 11 is slidably sleeved on the rotating rod 16. A limiting rib 13 is provided on the side of the rotating rod 16, and correspondingly, a groove adapted for the limiting rib 13 to slide is provided on the power transmission wheel 11. The adaptive power switching component further includes a shaft 14, and the transmission wheel 9 is flip-mounted on the rotating rod 16 through the shaft 14.

[0033] During the above process: due to the action of the limiting rib 13, the power transmission wheel 11 and the rotating rod 16 rotate synchronously, and the power transmission wheel 11 can slide freely on the rotating rod 16. As Figure 4 shown, when the power transmission wheel 11 moves to the right, through the action of the connecting rod 19, the transmission wheel 9 can be driven to tilt. The reason why the transmission wheel 9 can tilt is that: the transmission wheel 9 is mounted on the rotating rod 16 through the shaft 14, and the upper and lower ends of the deformation groove do not contact the rotating rod 16, so when the power transmission wheel 11 pulls the transmission wheel 9 to the right, the upper end of the transmission wheel 9 will tilt to the right.

[0034] At the same time, since the rotating motor 30 is in a working state of continuously driving the rotating rod 16 to rotate. When the power transmission wheel 11 does not tilt, the sliding block 17 moves in a circular motion along the sliding groove on the transmission wheel 9, and at this time, the transmission plate 1 does not move left and right. When the transmission wheel 9 is pulled by the power transmission wheel 11 and tilts, the movement path of the sliding block 17 generates a displacement in the horizontal direction (in the vertical direction, there is enough space for the sliding block 17 to move in the sliding groove), which will drive the transmission plate 1 to shake left and right, thereby driving the receiving frame 24 to shake, so that the dry powder flame retardant starts to be sprinkled on the battery to be tested.

Claims

1. A battery combustion test device, characterized in that, It comprises a self-starting dry powder flame retardant spreading mechanism and a housing (20); The self-starting dry powder flame retardant uniform spreading mechanism comprises a guide screen (25), a containing frame (24), a U-shaped connecting rod (26), a transmission plate (1), a pressure sensing plate (22), and an adaptive power switching assembly; The guide screen (25) is fixed to the inner side end of the housing (20), the receiving frame (24) is installed above the guide screen (25), the guide screen (25) is provided with a material spreading hole, and the receiving frame (24) is provided with a material discharging hole; One end of the U-shaped connecting rod (26) is fixed to the transmission plate (1), and the other end is fixed to the upper end of the containing frame (24); the pressure sensing plate (22) is slidably mounted on the bottom end of the housing (20); the pressure sensing plate (22) is the power input end of the adaptive power switching component, and the transmission plate (1) is the power output end of the adaptive power switching component.

2. The battery combustion test device according to claim 1, characterized in that, The diameter of the spreading hole is larger than the discharging hole.

3. The battery combustion test device according to claim 1, wherein The adaptive power switching assembly comprises a rotating motor (30), a rotating rod (16), a transmission wheel (9), a connecting rod (19), a power transmission wheel (11) and a sliding block (17); The output end of the rotating motor (30) and the rotating rod (16) are rotated and transmitted, the side end of the transmission wheel (9) is provided with a sliding groove, the sliding block (17) is slidably arranged in the sliding groove, and the sliding block (17) is fixed by the rod (18) and the transmission plate (1); One end of the connecting rod (19) is rotatably connected to the transmission wheel (9), and the other end is rotatably connected to the power transmission wheel (11); The transmission wheel (9) is provided with a deformation groove adapted for the rotation rod (16) to pass through, and the power transmission wheel (11) is slidably sleeved on the rotation rod (16).

4. A battery combustion test device according to claim 3, characterized in that, A limiting convex rib (13) is provided at the side end of the rotating rod (16), and correspondingly, a groove adapted to slide on the limiting convex rib (13) is provided on the power transmission wheel (11).

5. The battery combustion test device according to claim 3, characterized in that, The adaptive power switching assembly also includes a shaft (14), and the transmission wheel (9) is flipped and mounted on the rotating rod (16) via the shaft (14).

6. The battery combustion test device according to claim 3, characterized in that, The adaptive power switching assembly also includes a pulley (12), a screw rod (5), a rotating seat (4), a U-shaped slide rail (2), a rotating gear (6) and a transmission gear plate (7); One end of the screw rod (5) is rotatably connected to the pull wheel (12), and the other end is fixed to the rotating gear (6); the transmission tooth plate (7) is provided with meshing teeth (8), and the rotating gear (6) and the meshing teeth (8) are meshingly connected for transmission; the transmission tooth plate (7) and the pressure sensing plate (22) are fixed; The side end of the power transmission wheel (11) is provided with an annular groove adapted to fit the pull wheel (12) into which the synchronous transmission is embedded; the rotating seat (4) is fixed on the U-shaped slide rail (2), and the rotating seat (4) is provided with a threaded hole which is threadedly fixed to the screw rod (5).

7. The battery combustion test device according to claim 6, characterized in that, The rotating rod (16) is rotatably arranged on the side end of the U-shaped slide rail (2), and the end of the rotating rod (16) and the output end of the rotating motor (30) are synchronously driven via a transmission belt.

8. A battery combustion test device according to claim 6, characterized in that, The transmission plate (1) is slidably mounted on the upper end of the U-shaped slide rail (2).

9. The battery combustion test device according to claim 1, characterized in that, It also includes a force storage spring (31), one end of the force storage spring (31) is fixed to the inner end of the housing (20), and the other end of the force storage spring (31) is fixed to the pressure sensing plate (22).

10. The battery combustion test device according to claim 1, characterized in that, A slider (21) is provided at the inner end of the housing (20), and a free end of the slider (21) is rotatably connected to an isolation shield (28). The battery to be tested is placed in a cavity formed by the isolation shield (28) and the guiding sieve (25).

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