A lithium battery thermal runaway automatic early warning fire extinguishing and suppressing device

Abstract

The utility model provides a kind of lithium battery thermal runaway automatic early warning fire extinguishing suppression device, belong to lithium battery field, including box, the bottom of the box is fixedly connected with support leg, the inside fixed connection of the box is placed with board, the top of the board is provided with lithium battery, the inner wall of the box is provided with control switch, the lithium battery is electrically connected with control switch, the top of the box is provided with alarm device;The alarm device includes heat sensor, the bottom of the heat sensor is placed in the top of board, the inner wall of the box is provided with control panel.The utility model is provided with alarm device, so that rack can drive push plate to move when moving, and then push plate can contact control switch when moving, so that push plate can close control switch when contacting control switch, and then lithium battery running can be closed, to reduce the additional heating or damage caused by current continuous flow.

Description

Technical Field

[0001] This utility model relates to the field of lithium batteries, and more specifically, to an automatic early warning and fire suppression device for thermal runaway of lithium batteries. Background Technology

[0002] The automatic early warning and fire suppression device for lithium battery thermal runaway is designed to address the thermal runaway problems that may occur during the use or charging of lithium batteries (such as high-temperature explosions and fires caused by overcharging, short circuits, external short circuits, etc.).

[0003] A search revealed that Chinese patent CN219758453U discloses a "Lithium Battery Thermal Runaway Detection Device," comprising a wire, a flexible strip, and a resistor module. The wire extends along the flexible strip and passes inside it. The flexible strip is tensioned and wrapped around the outer periphery of the battery cell to form a cell sleeve. The resistor module is connected to the wire and configured to contact the battery cell so that the heat generated when the resistor is energized is transferred to the battery cell. This utility model discloses a lithium battery thermal runaway detection device that uses a flexible strip to wrap the battery cell, forming a cell sleeve. The elasticity of the strip holds the resistor module tightly against the battery cell, ensuring continuous heating. Furthermore, the flexible strip-wrapped cell sleeve is suitable for different battery cell models, meeting the testing requirements for thermal runaway of various sizes and models of batteries. However, it still has the following drawbacks:

[0004] (1) When using lithium batteries, the above application makes it difficult to issue an alarm and cut off the power supply when the lithium battery temperature rises rapidly, thus failing to reduce the additional heating or damage caused by continuous current flow.

[0005] The aforementioned applications, when using lithium batteries, have difficulty automatically activating the suppression device after detecting thermal runaway, making it impossible to quickly extinguish the fire and causing it to spread. Therefore, an automatic early warning and fire suppression device for lithium battery thermal runaway is proposed. Utility Model Content

[0006] The purpose of this invention is to address the current problem that it is difficult to issue an alarm and cut off the power supply when the temperature of a lithium battery rises rapidly, thus failing to reduce the additional heating or damage caused by continuous current flow.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0008] The present invention is as follows: an automatic early warning and fire suppression device for thermal runaway of lithium battery, comprising a housing, a support leg fixedly connected to the bottom of the housing, a placement plate fixedly connected inside the housing, a lithium battery disposed on the top of the placement plate, a control switch disposed on the inner wall of the housing, the lithium battery being electrically connected to the control switch, and an alarm device disposed on the top of the housing.

[0009] The alarm device includes a thermal sensor, the bottom of which is located on the top of the placement plate. A control board is installed on the inner wall of the box, and an alarm is installed on the side of the box. The alarm is electrically connected to the control board. A motor is fixedly connected to the inner wall of the box, and a rotating shaft is fixedly connected to the output shaft of the motor.

[0010] As a preferred technical solution of this utility model, a gear is fixedly connected to the circumferential surface of the rotating shaft, a rack is slidably connected to the inner wall of the housing, and a push plate is fixedly connected to the side of the rack. The rack is used to drive the push plate to move when moving.

[0011] As a preferred technical solution of this utility model, the circumferential surface of the gear meshes with the top of the rack, and the side of the control switch is located on the displacement trajectory of the push plate. The function of the circumferential surface of the gear meshing with the top of the rack is to drive the rack to move when the gear rotates. The function of the side of the control switch being located on the displacement trajectory of the push plate is to push the control switch to close when the push plate moves.

[0012] As a preferred technical solution of this utility model, the inside of the box is provided with an inhibition device, the inhibition device includes a connecting rod, the side of the connecting rod is fixedly connected to the side of the rack, a storage box is fixedly connected inside the box, a conveying pipe is fixedly connected to the side of the storage box, and a nozzle is fixedly connected to the end of the conveying pipe away from the storage box. The function of the conveying pipe is to convey carbon dioxide from the storage box to be sprayed out from the nozzle.

[0013] As a preferred technical solution of this utility model, a connecting shaft is slidably passed through the side of the storage box, and a compression plate is fixedly connected to the side of the connecting shaft. The side of the compression plate is slidably connected to the inner wall of the storage box. The function of the compression plate is to compress the carbon dioxide stored in the storage box.

[0014] As a preferred technical solution of this utility model, a return spring is fixedly connected to the circumferential surface of the connecting shaft. The end of the return spring away from the connecting shaft is fixedly connected to the side of the storage box. The function of the return spring is to allow the connecting shaft to be reset when the connecting rod stops pushing the connecting shaft.

[0015] As a preferred technical solution of this utility model, the side of the connecting shaft is located on the displacement trajectory of the connecting rod, and the top of the nozzle is located below the placement plate. The purpose of the side of the connecting shaft being located on the displacement trajectory of the connecting rod is to push the connecting shaft to move when the connecting rod moves.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The alarm device enables the rotating shaft to drive the gear to rotate, which in turn drives the rack to move. The rack then drives the push plate to move, and the push plate contacts the control switch. When the push plate contacts the control switch, it turns off the control switch, thereby shutting off the running lithium battery and reducing additional heating or damage caused by continuous current flow.

[0018] 2. The suppression device ensures that the connecting shaft moves into the storage tank when pushed by the connecting rod. This movement of the connecting shaft drives the extrusion plate to move, which in turn extrudes the carbon dioxide stored in the storage tank. The carbon dioxide is then extruded through the delivery pipe into the nozzle due to the pressure from the extrusion plate, allowing the fire source to be extinguished quickly before it occurs, thus preventing the fire from spreading. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of an automatic early warning and fire suppression device for thermal runaway of lithium batteries provided by this utility model;

[0020] Figure 2 A schematic diagram of the overall three-dimensional structure of the alarm device provided by this utility model;

[0021] Figure 3 A schematic diagram of the overall three-dimensional structure of the suppression device provided by this utility model;

[0022] Figure 4 Provided by this utility model Figure 2 A three-dimensional magnified structural diagram at point A in the middle;

[0023] Figure 5 Provided by this utility model Figure 3 A three-dimensional magnified structural diagram at point B.

[0024] 1. Housing; 2. Support legs; 3. Placement plate; 4. Lithium battery; 5. Control switch; 6. Alarm device; 61. Thermal sensor; 62. Control board; 63. Alarm; 64. Motor; 65. Rotating shaft; 66. Gear; 67. Rack; 68. Push plate; 7. Suppression device; 71. Connecting rod; 72. Storage box; 73. Delivery pipe; 74. Nozzle; 75. Connecting shaft; 76. Extrusion plate; 77. Return spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] like Figure 1 , Figure 2 , Figure 4 As shown, this embodiment proposes an automatic early warning and fire suppression device for thermal runaway of lithium batteries, including a box 1, a support leg 2 fixedly connected to the bottom of the box 1, a placement plate 3 fixedly connected inside the box 1, a lithium battery 4 disposed on the top of the placement plate 3, a control switch 5 disposed on the inner wall of the box 1, the lithium battery 4 being electrically connected to the control switch 5, and an alarm device 6 disposed on the top of the box 1.

[0030] The alarm device 6 includes a thermal sensor 61, the bottom of which is located on the top of the placement plate 3. A control board 62 is provided on the inner wall of the housing 1. An alarm 63 is provided on the side of the housing 1. The alarm 63 is electrically connected to the control board 62. A motor 64 is fixedly connected to the inner wall of the housing 1. A rotating shaft 65 is fixedly connected to the output shaft of the motor 64.

[0031] like Figure 4As shown, in a preferred embodiment, based on the above method, a gear 66 is fixedly connected to the circumferential surface of the rotating shaft 65, a rack 67 is slidably connected to the inner wall of the housing 1, and a push plate 68 is fixedly connected to the side of the rack 67. The function of the rack 67 is to drive the push plate 68 to move when moving.

[0032] like Figure 2 , Figure 4 As shown, in a preferred embodiment, based on the above method, the circumferential surface of gear 66 meshes with the top of rack 67, and the side of control switch 5 is located on the displacement trajectory of push plate 68. The function of the circumferential surface of gear 66 meshing with the top of rack 67 is to drive rack 67 to move when gear 66 rotates. The function of the side of control switch 5 being located on the displacement trajectory of push plate 68 is to push control switch 5 to close when push plate 68 moves.

[0033] like Figure 3 , Figure 5 As shown, in a preferred embodiment, based on the above method, a suppression device 7 is further provided inside the housing 1. The suppression device 7 includes a connecting rod 71, the side of which is fixedly connected to the side of the rack 67. A storage tank 72 is fixedly connected inside the housing 1. A delivery pipe 73 is fixedly connected to the side of the storage tank 72. A nozzle 74 is fixedly connected to the end of the delivery pipe 73 away from the storage tank 72. The function of the delivery pipe 73 is to deliver carbon dioxide from the storage tank 72 and spray it out from the nozzle 74.

[0034] like Figure 5 As shown, in a preferred embodiment, based on the above method, a connecting shaft 75 is slidably passed through the side of the storage box 72, and a compression plate 76 is fixedly connected to the side of the connecting shaft 75. The side of the compression plate 76 is slidably connected to the inner wall of the storage box 72. The function of the compression plate 76 is to compress the carbon dioxide stored in the storage box 72.

[0035] like Figure 5 As shown, in a preferred embodiment, based on the above method, a return spring 77 is further fixedly connected to the circumferential surface of the connecting shaft 75. The end of the return spring 77 away from the connecting shaft 75 is fixedly connected to the side of the storage box 72. The function of the return spring 77 is to allow the connecting shaft 75 to be reset when the connecting rod 71 no longer pushes the connecting shaft 75.

[0036] like Figure 3 , Figure 5As shown, in a preferred embodiment, based on the above method, the side of the connecting shaft 75 is located on the displacement trajectory of the connecting rod 71, and the top of the nozzle 74 is located below the placement plate 3. The purpose of the side of the connecting shaft 75 being located on the displacement trajectory of the connecting rod 71 is to push the connecting shaft 75 to move when the connecting rod 71 moves.

[0037] Specifically, when using this lithium battery alarm device: First, when using this device, the alarm device 6 can be used to sound an alarm when the temperature of the lithium battery 4 is too high. The temperature of the lithium battery 4 can be monitored in real time through the setting of the thermal sensor 61, especially the temperature change when the lithium battery 4 is working. When the thermal sensor 61 detects a rapid increase in the temperature of the lithium battery 4, the thermal sensor 61 will transmit the detection feedback to the control board 62. The control board 62 can then control the alarm 63 to sound an alarm in time to remind the user. At the same time, the control board 62 can control the motor 64 to start. When the output shaft of the motor 64 rotates, it can drive the rotating shaft 65 to rotate. When the rotating shaft 65 rotates, it can drive the gear 66 to rotate. When the gear 66 rotates, it can push the rack 67 to move. When the rack 67 moves, it can drive the push plate 68 to move. When the push plate 68 moves, it can contact the control switch 5. When the push plate 68 contacts the control switch 5, it can close the control switch 5, thereby shutting down the running lithium battery 4, thereby reducing additional heating or damage caused by continuous current flow.

[0038] The movement of rack 67 can drive the suppression device 7. When rack 67 moves, it can drive connecting rod 71 to move. When connecting rod 71 moves, it can push connecting shaft 75. When connected shaft 75 is pushed by connecting rod 71, it will move into storage tank 72. Thus, when connected shaft 75 moves, it can drive extrusion plate 76 to move. When extrusion plate 76 moves, it can extrude carbon dioxide stored in storage tank 72. Then, carbon dioxide will enter nozzle 74 through delivery pipe 73 and be sprayed out from nozzle 74 due to the extrusion of extrusion plate 76. This allows the fire source to be extinguished quickly before the fire occurs, preventing the fire from spreading.

[0039] All technical features in this embodiment can be freely combined according to actual needs.

[0040] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An automatic early warning and fire suppression device for thermal runaway of lithium batteries, comprising a housing (1), characterized in that, The bottom of the box (1) is fixedly connected to a support leg (2), the inside of the box (1) is fixedly connected to a placement plate (3), the top of the placement plate (3) is provided with a lithium battery (4), the inner wall of the box (1) is provided with a control switch (5), the lithium battery (4) is electrically connected to the control switch (5), and the top of the box (1) is provided with an alarm device (6). The alarm device (6) includes a thermal sensor (61), the bottom of which is located on the top of the placement plate (3). A control board (62) is provided on the inner wall of the box (1), and an alarm (63) is provided on the side of the box (1). The alarm (63) is electrically connected to the control board (62). A motor (64) is fixedly connected to the inner wall of the box (1), and a rotating shaft (65) is fixedly connected to the output shaft of the motor (64).

2. The lithium battery thermal runaway automatic early warning and fire suppression device according to claim 1, characterized in that, A gear (66) is fixedly connected to the circumferential surface of the rotating shaft (65), a rack (67) is slidably connected to the inner wall of the housing (1), and a push plate (68) is fixedly connected to the side of the rack (67).

3. The lithium battery thermal runaway automatic early warning and fire suppression device according to claim 2, characterized in that, The circumferential surface of the gear (66) meshes with the top of the rack (67), and the side of the control switch (5) is located on the displacement trajectory of the push plate (68).

4. The lithium battery thermal runaway automatic early warning and fire suppression device according to claim 1, characterized in that, An inhibition device (7) is provided inside the housing (1). The inhibition device (7) includes a connecting rod (71). The side of the connecting rod (71) is fixedly connected to the side of the rack (67). A storage box (72) is fixedly connected inside the housing (1). A conveying pipe (73) is fixedly connected to the side of the storage box (72). A nozzle (74) is fixedly connected to the end of the conveying pipe (73) away from the storage box (72).

5. The lithium battery thermal runaway automatic early warning and fire suppression device according to claim 4, characterized in that, A connecting shaft (75) slides through the side of the storage box (72), and an extrusion plate (76) is fixedly connected to the side of the connecting shaft (75). The side of the extrusion plate (76) is slidably connected to the inner wall of the storage box (72).

6. The lithium battery thermal runaway automatic early warning and fire suppression device according to claim 5, characterized in that, A return spring (77) is fixedly connected to the circumferential surface of the connecting shaft (75), and the end of the return spring (77) away from the connecting shaft (75) is fixedly connected to the side of the storage box (72).

7. The lithium battery thermal runaway automatic early warning and fire suppression device according to claim 5, characterized in that, The side of the connecting shaft (75) is located on the displacement trajectory of the connecting rod (71), and the top of the nozzle (74) is located below the placement plate (3).

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