New energy automobile lithium battery fire alarm device

Abstract

The invention belongs to the field of alarm devices, and particularly relates to a new energy automobile lithium battery fire alarm device which comprises a bearing plate. A warning mechanism is arranged in the bearing plate, and the bearing plate is installed at the bottom end of the new energy automobile lithium battery pack through screws. The warning mechanism comprises a driving assembly, an auxiliary fire extinguishing assembly and an ejection alarm assembly, one end of the driving assembly is provided with the auxiliary fire extinguishing assembly, the auxiliary fire extinguishing assembly is used for inhibiting rapid spreading of fire of the automobile lithium battery, and the ejection alarm assembly is arranged at the bottom end of the auxiliary fire extinguishing assembly. The ejection alarm assembly is used for warning surrounding vehicles and pedestrians; through the structural design of the warning mechanism, the function of warning surrounding vehicles and pedestrians in time before the lithium battery of the new energy automobile deflagrates is achieved, and liquid carbon dioxide stored in the storage cavity can be released to restrain fire of the battery while warning is conducted; and time is won for evacuation of fire rescue crowds and escape of drivers and passengers.

Description

Technical Field

[0001] The present invention relates to the field of alarm devices, in particular to a lithium battery fire alarm device for new energy vehicles. Background Art

[0002] New energy vehicle lithium batteries provide energy for the vehicle's driving. They have high energy density and a compact internal structure. When the diaphragm inside the battery is damaged due to impact or puncture, the battery will cause a burst of fire in a short period of time. In order to protect the safety of drivers and passengers, existing new energy vehicles can already warn the driver through sensors inside the battery pack, prompting the driver that the battery pack is about to burst into flames.

[0003] The existing new energy vehicle lithium battery fire alarm device can be specifically referred to the Chinese invention patent with publication number CN117261694A, which discloses in detail a new energy vehicle energy storage equipment status monitoring and alarm system, including: a battery detection module, used to obtain the battery status data of the energy vehicle; a fuel tank monitoring module, used to obtain the fuel tank status data of the energy vehicle; a vehicle subsystem, used to send the pre-processed battery status data and fuel tank status data to the storage subsystem, and can also send vehicle positioning information to the storage subsystem; the storage subsystem is used to receive the pre-processed battery status data and fuel tank status data, judge the battery status and fuel tank status of the new energy vehicle according to the battery status data and the fuel tank status data, and locate the vehicle at the same time; a display module, used to display the battery status and fuel tank status of the energy vehicle in real time, which can continuously monitor the key indicators of the energy storage equipment and fuel system of the new energy vehicle, and issue an alarm when abnormal changes occur, so as to avoid large-scale fires.

[0004] Although the existing new energy vehicle lithium battery fire alarm device can effectively warn the driver and passengers before the battery catches fire, it is unable to promptly warn surrounding vehicles and pedestrians, who are easily injured by the sudden explosion of the vehicle. Therefore, a new energy vehicle lithium battery fire alarm device is proposed to address the above problem. Summary of the invention

[0005] In order to solve the problem that the existing lithium battery fire alarm device for new energy vehicles can effectively warn the driver and passengers before the battery catches fire, but cannot promptly warn the surrounding vehicles and pedestrians, and the surrounding vehicles and pedestrians are easily injured by the sudden explosion of the vehicle, the present invention proposes a lithium battery fire alarm device for new energy vehicles.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a new energy vehicle lithium battery fire alarm device described in the present invention comprises a bearing plate; a warning mechanism is arranged inside the bearing plate, and the bearing plate is mounted on the bottom end of the new energy vehicle lithium battery pack by screws; The warning mechanism includes a driving component, an auxiliary fire extinguishing component and a ejection alarm component. An auxiliary fire extinguishing component is provided at one end of the driving component. The auxiliary fire extinguishing component is used to suppress the rapid spread of fire in the automobile lithium battery. The ejection alarm component is arranged at the bottom end of the auxiliary fire extinguishing component, and the ejection alarm component is used to warn surrounding vehicles and pedestrians.

[0007] Preferably, the driving assembly includes a buffer chamber, which is opened at the top of the supporting plate, and a group of connecting grooves are opened between every two channels of the buffer chamber. A connecting disk is rotatably connected inside the connecting groove, and the top of the connecting disk is fixedly connected to the bottom end of the torsion spring. The top of the torsion spring is fixedly connected to the top of the inner wall of the connecting groove. Notches are opened on both sides of the connecting disk, and a damping limit assembly is provided at one end of the connecting disk away from the auxiliary fire extinguishing assembly. The damping limit assembly is used to suppress the rotation of the connecting disk caused by the vibration of the car during normal driving.

[0008] Preferably, the damping limit assembly includes a slider, which is fixedly connected to one end of the connecting plate away from the auxiliary fire extinguishing assembly, and the slider is slidably connected to the inside of the slide groove, the slide groove is opened at one end of the inner wall of the connecting groove away from the auxiliary fire extinguishing assembly, and a damping block is glued to the inner wall of the slide groove, and the damping block is made of phenyl silicone rubber.

[0009] Preferably, the auxiliary fire extinguishing assembly includes a pressure relief port, an injection groove and a storage chamber, the injection groove is provided with a connecting plate at one end away from the slider, the storage chamber is provided inside the supporting plate, and the storage chamber is connected to the connecting groove, liquid carbon dioxide is stored inside the storage chamber, and the pressure relief port is provided at the center position of the bottom end of the buffer chamber.

[0010] Preferably, the ejection alarm assembly includes a top block, which is fixedly connected to the center position of the bottom end of the connecting disk, and the top block is inserted into the inside of the movable cavity, the movable cavity is opened at the top end of the bearing seat, the bearing seat is inserted into the inside of the connecting groove, a supporting ring is provided at the bottom end of the bearing seat, the inside of the movable cavity is slidably connected with a movable block, the bottom end of the movable block is provided with a spring, connecting assemblies are provided on both sides of the bottom end of the movable block, a warning light is fixedly connected to the outside of the bearing seat, two groups of speakers are fixedly connected to the top of the bearing seat, an ejection assembly is also provided at the bottom end of the connecting groove, and two groups of button batteries are provided near the center of the bearing seat.

[0011] Preferably, the supporting ring is fixedly connected to the bottom end of the inner wall of the connecting groove, and the supporting ring is made of rubber. The bottom end of the inner wall of the connecting groove is also fixedly connected to a limiting strip, and the limiting strip is slidably connected to the limiting groove, and the limiting groove is opened on the outer side of the bottom end of the bearing seat.

[0012] Preferably, a ball is rotatably connected to the top end of the movable block, the top end of the spring is fixedly connected to the bottom end of the movable block, and the bottom end of the spring is fixedly connected to the inner wall of the movable cavity.

[0013] Preferably, the connecting component includes a first conductive block, which is fixedly connected to the bottom end of the movable block at a position close to both sides, and the first conductive block is inserted into the inside of the conductive cavity, the conductive cavity is opened on both sides of the bottom end of the inner wall of the movable cavity, and the inside of the conductive cavity is fixedly connected with a second conductive block, the first conductive block is electrically connected to the warning light and the speaker through wires, and the second conductive block is electrically fused to two groups of button batteries through wires.

[0014] Preferably, the ejection assembly comprises an ejection block, the ejection block is fixedly connected to the bottom end of the connecting plate, and the ejection block cooperates with the receiving groove, and the receiving groove is provided at the top end of the bearing seat.

[0015] Preferably, a buffer ring is fixedly connected to the inner wall of the connecting groove near the middle, and the buffer ring is made of rubber. The top of the buffer ring fits with the bottom end of the connecting disk, and the inner wall of the buffer ring fits with the outer side of the bearing seat.

[0016] The present invention is beneficial in that: 1. The present invention realizes the function of timely warning surrounding vehicles and pedestrians before the lithium battery of new energy vehicles explodes through the structural design of the warning mechanism. While warning, the liquid carbon dioxide stored in the storage chamber can be released. The heat of the battery is absorbed by the liquid carbon dioxide, which can suppress the battery fire to a certain extent, and buy a certain amount of time for the evacuation of fire rescue people and the escape of drivers and passengers. It solves the problem that the existing lithium battery fire alarm device for new energy vehicles can effectively warn the drivers and passengers before the battery catches fire, but cannot timely warn the surrounding vehicles and pedestrians, and the surrounding vehicles and pedestrians are easily injured by the sudden explosion of the vehicle; 2. The present invention realizes the function of limiting the rotation direction and rotation angle of the connecting plate through the structural design of the damping limit assembly, so that the connecting plate can only rotate in a specified direction, and at the same time avoids the connecting plate from rotating due to the vibration of the normal driving of the vehicle; 3. The present invention realizes the function of absorbing the heat of the battery pack and diluting or replacing the high-pressure flammable gas ejected by the damaged battery pack through the structural design of the auxiliary fire extinguishing component, which can effectively delay the occurrence of battery pack explosion and even prevent the battery pack from continuing to burn, effectively improving the safety of the vehicle; 4. The present invention can effectively alert pedestrians and vehicles passing by through the structural design of the ejection alarm component and the drive component, prevent pedestrians and vehicles from approaching, and facilitate firefighters to handle the scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention from a top view; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention when viewed from above; Figure 3 It is a schematic diagram of a first partial cross-sectional three-dimensional structure of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of a second partial cross-sectional three-dimensional structure of the present invention; Figure 6 It is a schematic diagram of a third partial cross-sectional three-dimensional structure of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 It is a schematic diagram of a first partial explosion structure of the present invention; Fig. 9 It is a schematic diagram of a second partial explosion structure of the present invention; Fig.10 It is a partial three-dimensional structural schematic diagram of the connecting disk, notch, top block and ejection block of the present invention.

[0019] In the figure: 1, bearing plate; 21, buffer cavity; 22, pressure relief port; 23, connecting groove; 24, connecting plate; 25, torsion spring; 26, notch; 27, slider; 28, slide groove; 29, damping block; 30, injection groove; 31, storage cavity; 32, top block; 33, movable cavity; 34, movable block; 35, ball; 36, spring; 37, first conduction block; 38, conduction cavity; 39, second conduction block; 40, bearing seat; 41, supporting ring; 42, limit strip; 43, limit groove; 44, buffer ring; 45, button battery; 46, warning light; 47, speaker; 48, ejection block; 49, storage groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0021] See also Figure 1-Figure 10 As shown, a new energy vehicle lithium battery fire alarm device includes a carrier plate 1; a warning mechanism is arranged inside the carrier plate 1, and the carrier plate 1 is mounted on the bottom end of the new energy vehicle lithium battery pack by screws; The warning mechanism includes a driving component, an auxiliary fire extinguishing component and a ejection alarm component. The auxiliary fire extinguishing component is arranged at one end of the driving component. The auxiliary fire extinguishing component is used to suppress the rapid spread of the fire of the automobile lithium battery. The ejection alarm component is arranged at the bottom end of the auxiliary fire extinguishing component, and the ejection alarm component is used to warn surrounding vehicles and pedestrians. The driving component includes a buffer chamber 21, and the buffer chamber 21 is opened at the top of the bearing plate 1. A group of connecting grooves 23 are opened between each two channels of the buffer chamber 21. The internal rotation of the connecting groove 23 is connected with a connecting disk 24. The top end of the connecting disk 24 is fixedly connected to the bottom end of the torsion spring 25, and the top end of the torsion spring 25 is fixedly connected to the Connected to the top of the inner wall of the connecting groove 23, notches 26 are provided on both sides of the connecting plate 24, and a damping limit assembly is provided at one end of the connecting plate 24 away from the auxiliary fire extinguishing assembly. The damping limit assembly is used to suppress the rotation of the connecting plate 24 caused by the vibration of the car during normal driving. The damping limit assembly includes a slider 27, which is fixedly connected to the end of the connecting plate 24 away from the auxiliary fire extinguishing assembly, and the slider 27 is slidably connected to the inside of the slide groove 28. The slide groove 28 is provided at one end of the inner wall of the connecting groove 23 away from the auxiliary fire extinguishing assembly, and a damping block 29 is glued to the inner wall of the slide groove 28, and the damping block 29 is made of phenyl silicone rubber; The auxiliary fire extinguishing assembly includes a pressure relief port 22, an injection groove 30 and a storage chamber 31. The pressure relief port 22 is used to guide and release excessive internal pressure. When the gas generated by the positive and negative electrode reactions of the battery is extremely large, it is released by breaking through the pressure relief port 22 at a relatively weak point to avoid the situation where the pressure inside the buffer chamber 21 is too large to cause an explosion. The injection groove 30 is provided with a connecting plate 24 at one end away from the slider 27. The storage chamber 31 is provided inside the carrier plate 1, and the storage chamber 31 is connected to the connecting groove 23. Liquid carbon dioxide is stored inside the storage chamber 31. The pressure relief port 22 is provided in the buffer chamber. 21, the ejection alarm assembly includes a top block 32, the top block 32 is fixedly connected to the center of the bottom of the connecting plate 24, and the top block 32 is inserted into the inside of the active cavity 33, the active cavity 33 is opened at the top of the bearing seat 40, the bearing seat 40 is inserted into the inside of the connecting groove 23, the bottom end of the bearing seat 40 is provided with a supporting ring 41, the inside of the active cavity 33 is slidably connected with the active block 34, the bottom end of the active block 34 is provided with a spring 36, both sides of the bottom end of the active block 34 are provided with connecting assemblies, and the outer side of the bearing seat 40 is fixedly connected with a warning light 46 The top of the bearing seat 40 is fixedly connected with two groups of speakers 47, the bottom of the connecting groove 23 is also provided with an ejection assembly, two groups of button batteries 45 are provided near the center of the bearing seat 40, a supporting ring 41 is fixedly connected to the bottom of the inner wall of the connecting groove 23, and the supporting ring 41 is made of rubber, the bottom of the inner wall of the connecting groove 23 is also fixedly connected with a limit strip 42, the limit strip 42 is slidably connected with the limit slot 43, the limit slot 43 is opened on the outer side of the bottom of the bearing seat 40, the top of the movable block 34 is rotatably connected with a ball 35, the top of the spring 36 is connected with the movable block 34 The bottom end of the spring 36 is fixedly connected, and the bottom end of the spring 36 is fixedly connected to the inner wall of the active cavity 33. The connecting component includes a first conducting block 37, which is fixedly connected to the bottom end of the active block 34 near the two sides, and the first conducting block 37 is inserted into the inside of the conducting cavity 38. The conducting cavity 38 is opened on both sides of the bottom end of the inner wall of the active cavity 33. The inside of the conducting cavity 38 is fixedly connected with a second conducting block 39. The first conducting block 37 is connected to the warning light 46 and the speaker 47 by wire electric melting, and the second conducting block 39 is connected to the two groups of button batteries 45 by wire electric melting; During operation, when the battery pack of the new energy vehicle is damaged, the gas ejected by the chemical reaction of the positive and negative electrodes of the battery pack enters the interior of the buffer chamber 21, and enters the interior of the connecting groove 23 along the direction of the buffer chamber 21. The gas continuously ejected by the battery pack continuously enters the interior of the connecting groove 23 to apply pressure to the torsion spring 25 provided on the connecting plate 24, so that the connecting plate 24 rotates. During the rotation process, the connecting plate 24 drives the position of the injection groove 30 to change. First, the injection groove 30 is connected to the storage chamber 31 so that the hydraulic carbon dioxide in the storage chamber 31 enters the interior of the injection groove 30. At this time, the injection The groove 30 is also driven by the hydraulic carbon dioxide inside the storage chamber 31 to drive the connecting disk 24 to rotate until the connecting disk 24 rotates to the limit. At this time, the injection groove 30 is connected with the storage chamber 31 and the buffer chamber 21 at the same time. The liquid carbon dioxide inside the storage chamber 31 directly enters the buffer chamber 21 through the passage formed by the injection groove 30. The liquid carbon dioxide quickly absorbs the heat of the battery pack and vaporizes, thereby reducing the temperature of the battery pack. At the same time, dense gaseous carbon dioxide is formed locally, and the oxygen content is diluted by the gaseous carbon dioxide, thereby reducing the combustion rate of the battery pack and suppressing the combustion of the battery pack.

[0022] When the connecting disk 24 rotates, the connecting disk 24 drives the torsion spring 25 to twist, causing the torsion spring 25 to produce elastic deformation. The restoring force of the torsion spring 25 plays the effect of automatically restoring the connecting disk 24 after the thrust disappears. When the connecting disk 24 rotates, it drives the fixedly connected slider 27 to slide inside the slide groove 28 synchronously. The rotation angle of the connecting disk 24 is limited by the combined action of the slider 27 and the slide groove 28 to prevent the connecting disk 24 from rotating excessively. The damping block 29 fixedly connected to the inner wall of the slide groove 28 provides resistance to the movement of the slider 27 to prevent the connecting disk 24 from rotating due to the vibration of the normal driving of the vehicle.

[0023] Further, the ejection assembly includes an ejection block 48, which is fixedly connected to the bottom end of the connecting plate 24, and the ejection block 48 cooperates with the receiving groove 49, and the receiving groove 49 is opened at the top of the bearing seat 40. A buffer ring 44 is fixedly connected to the inner wall of the connecting groove 23 near the middle, and the buffer ring 44 is made of rubber. The top of the buffer ring 44 fits with the bottom end of the connecting plate 24, and the inner wall of the buffer ring 44 fits with the outer side of the bearing seat 40; During operation, when the connecting disk 24 rotates, the ejection block 48 fixedly connected to the bottom end of the connecting disk 24 rotates synchronously with the rotation of the connecting disk 24, and the ejection block 48 escapes from the inside of the receiving groove 49 to push the bearing seat 40 downward, so that the bearing seat 40 squeezes the supporting ring 41 to produce elastic deformation. The cross-section of the supporting ring 41 is designed to be an inverted triangle, so that the supporting ring 41 releases the obstruction of the bearing seat 40, so that the bearing seat 40 falls out of the inside of the connecting groove 23 and falls on the ground. In the process of the bearing seat 40 moving downward, the ejection block 32 also gradually relaxes the movable block 3 4 is squeezed, so that the movable block 34 moves upward under the action of the restoring force of the spring 36, and drives the first conductive block 37 fixedly connected to move upward synchronously inside the conductive cavity 38, until the first conductive block 37 and the second conductive block 39 are tightly fitted to make the circuit conductive. At this time, the button battery 45 supplies power to the warning light 46 and the speaker 47, the warning light 46 flashes, and the alarm light speaker 47 plays a warning sound effect, thereby warning the surrounding vehicles and pedestrians. The inner wall of the conductive cavity 38 is sprayed with insulating paint, which can effectively avoid leakage.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A new energy vehicle lithium battery fire alarm device, characterized in that: It comprises a bearing plate (1); a warning mechanism is arranged inside the bearing plate (1); the bearing plate (1) is mounted on the bottom end of a lithium battery pack of a new energy vehicle by means of screws; The warning mechanism includes a driving component, an auxiliary fire extinguishing component and a ejection alarm component. An auxiliary fire extinguishing component is provided at one end of the driving component. The auxiliary fire extinguishing component is used to suppress the rapid spread of fire in the automobile lithium battery. The ejection alarm component is arranged at the bottom end of the auxiliary fire extinguishing component, and the ejection alarm component is used to warn surrounding vehicles and pedestrians.

2. A new energy vehicle lithium battery fire alarm device according to claim 1, characterized in that: The driving assembly comprises a buffer chamber (21), the buffer chamber (21) being provided at the top end of the bearing plate (1), a group of connecting grooves (23) being provided between each two channels of the buffer chamber (21), a connecting plate (24) being rotatably connected inside the connecting groove (23), the top end of the connecting plate (24) being fixedly connected to the bottom end of a torsion spring (25), the top end of the torsion spring (25) being fixedly connected to the top end of the inner wall of the connecting groove (23), notches (26) being provided on both sides of the connecting plate (24), and a damping limit assembly being provided at one end of the connecting plate (24) away from the auxiliary fire extinguishing assembly, the damping limit assembly being used to suppress the rotation of the connecting plate (24) caused by the vibration of the vehicle during normal driving.

3. A new energy vehicle lithium battery fire alarm device according to claim 2, characterized in that: The damping limit assembly comprises a slider (27), the slider (27) being fixedly connected to one end of the connecting plate (24) away from the auxiliary fire extinguishing assembly, and the slider (27) being slidably connected to the inside of a slide groove (28), the slide groove (28) being provided at one end of the inner wall of the connecting groove (23) away from the auxiliary fire extinguishing assembly, and a damping block (29) being glued to the inner wall of the slide groove (28), and the damping block (29) being made of phenyl silicone rubber.

4. A new energy vehicle lithium battery fire alarm device according to claim 3, characterized in that: The auxiliary fire extinguishing assembly comprises a pressure relief port (22), an injection groove (30) and a storage chamber (31); the injection groove (30) is provided at an end of the connecting plate (24) away from the slider (27); the storage chamber (31) is provided inside the supporting plate (1), and the storage chamber (31) is connected to the communication groove (23); liquid carbon dioxide is stored inside the storage chamber (31); and the pressure relief port (22) is provided at the center of the bottom end of the buffer chamber (21).

5. A new energy vehicle lithium battery fire alarm device according to claim 4, characterized in that: The ejection alarm assembly comprises a top block (32), the top block (32) being fixedly connected to the center position of the bottom end of the connecting plate (24), and the top block (32) being inserted into the inside of the movable cavity (33), the movable cavity (33) being opened at the top end of the bearing seat (40), the bearing seat (40) being inserted into the inside of the connecting groove (23), the bottom end of the bearing seat (40) being provided with a supporting ring (41), the inside of the movable cavity (33) being slidably connected with a movable block (34), the bottom end of the movable block (34) being provided with a spring (36), both sides of the bottom end of the movable block (34) being provided with connecting assemblies, the outer side of the bearing seat (40) being fixedly connected with a warning light (46), the top end of the bearing seat (40) being fixedly connected with two groups of speakers (47), the bottom end of the connecting groove (23) being further provided with an ejection assembly, and two groups of button batteries (45) being provided at a position near the center inside the bearing seat (40).

6. A new energy vehicle lithium battery fire alarm device according to claim 5, characterized in that: The supporting ring (41) is fixedly connected to the bottom end of the inner wall of the connecting groove (23), and the supporting ring (41) is made of rubber. The bottom end of the inner wall of the connecting groove (23) is also fixedly connected to a limiting strip (42), and the limiting strip (42) is slidably connected to the limiting groove (43). The limiting groove (43) is arranged on the outer side of the bottom end of the bearing seat (40).

7. A new energy vehicle lithium battery fire alarm device according to claim 6, characterized in that: The top end of the movable block (34) is rotatably connected to a ball (35), the top end of the spring (36) is fixedly connected to the bottom end of the movable block (34), and the bottom end of the spring (36) is fixedly connected to the inner wall of the movable cavity (33).

8. A new energy vehicle lithium battery fire alarm device according to claim 7, characterized in that: The connection component comprises a first conductive block (37), the first conductive block (37) being fixedly connected to a position close to both sides of the bottom end of the movable block (34), and the first conductive block (37) being inserted into the interior of a conductive cavity (38), the conductive cavity (38) being opened on both sides of the bottom end of the inner wall of the movable cavity (33), the interior of the conductive cavity (38) being fixedly connected with a second conductive block (39), the first conductive block (37) being electrically connected to a warning light (46) and a speaker (47) through a wire, and the second conductive block (39) being electrically connected to two groups of button batteries (45) through a wire.

9. A new energy vehicle lithium battery fire alarm device according to claim 8, characterized in that: The ejection assembly comprises an ejection block (48), the ejection block (48) is fixedly connected to the bottom end of the connecting plate (24), and the ejection block (48) cooperates with a receiving groove (49), and the receiving groove (49) is opened at the top end of the bearing seat (40).

10. A new energy vehicle lithium battery fire alarm device according to claim 9, characterized in that: A buffer ring (44) is fixedly connected to the inner wall of the connecting groove (23) near the middle, and the buffer ring (44) is made of rubber. The top end of the buffer ring (44) fits with the bottom end of the connecting plate (24), and the inner wall of the buffer ring (44) fits with the outer side of the bearing seat (40).

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