A power battery fire warning device

Abstract

The utility model relates to a power battery fire early warning device belongs to the battery early warning field. Include: air pressure monitoring mechanism, pressure -relief mechanism, auxiliary temperature monitor and control mechanism, the control mechanism installs in air pressure monitoring mechanism, air pressure monitoring mechanism fixed mounting is on the battery mechanism, and with battery mechanism intercommunication, pressure -relief mechanism fixed mounting is in air pressure monitoring mechanism, with air pressure monitoring mechanism intercommunication, the auxiliary temperature monitor installs in battery mechanism, the control mechanism with auxiliary temperature monitor with battery mechanism connects. The utility model is favorable to the real -time monitoring of the temperature and gas pressure inside battery mechanism, when temperature and / or gas pressure reach threshold value, carry out automatic alarm, early warning driver evacuation before the thick smoke produces, provide the valuable evacuation time, reduce the security hidden danger.

Description

Technical Field

[0001] This utility model relates to the field of battery early warning, and in particular to a power battery fire early warning device. Background Technology

[0002] Lithium-ion batteries are a common type of energy storage device and are frequently used in energy storage systems in automobiles, electronic devices, and other fields. However, due to their inherent characteristics, lithium-ion batteries are prone to generating high temperatures inside when subjected to severe impacts, severe aging, or even short circuits. This can lead to explosions and combustion, and specialized fire warning devices are often used in such cases.

[0003] Most existing fire warning devices monitor the temperature and smoke inside the battery casing. An alert is only issued when both the temperature and smoke concentration reach thresholds. However, in the early stages of a fire, the battery first experiences a temperature rise. As the temperature continues to rise, various materials inside the battery begin to decompose and produce gases. This gas production increases the internal pressure of the battery, a crucial stage in the fire's development. Finally, the gases react further, mixing with other substances to form smoke. Therefore, waiting for both smoke concentration and temperature to reach the thresholds results in missed warning time, potentially creating safety hazards. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a power battery fire early warning device to solve the above-mentioned problem.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A power battery fire early warning device includes: a pressure monitoring mechanism, a pressure relief mechanism, an auxiliary temperature monitor, and a control mechanism; the control mechanism is installed inside the pressure monitoring mechanism, the pressure monitoring mechanism is fixedly installed on the battery mechanism and communicates with the battery mechanism, the pressure relief mechanism is fixedly installed on the pressure monitoring mechanism and communicates with the pressure monitoring mechanism, the auxiliary temperature monitor is installed inside the battery mechanism, and the control mechanism is connected to the pressure monitoring mechanism, the auxiliary temperature monitor, and the battery mechanism.

[0006] The beneficial effects of this utility model are: the air pressure monitoring mechanism, in conjunction with the control mechanism, facilitates real-time monitoring of the air pressure inside the battery mechanism; the auxiliary temperature monitor, in conjunction with the control mechanism, facilitates real-time monitoring of the temperature inside the battery mechanism; when the temperature and / or gas pressure reach the preset threshold in the control mechanism, an automatic alarm is triggered, providing valuable evacuation time and reducing safety hazards by warning the driver to evacuate before dense smoke is generated; the pressure relief mechanism helps to release the pressure inside the power battery casing when the pressure inside the battery mechanism is too high, preventing damage to the battery due to excessive pressure.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the air pressure monitoring mechanism includes: a monitoring sleeve, multiple limiting components, an air pressure monitoring component, and a protective cover; the monitoring sleeve is fixedly installed on the top of the battery mechanism and communicates with the battery mechanism; the air pressure monitoring component is slidably disposed inside the monitoring sleeve; the top and bottom ends of the limiting components are fixedly connected to the inner wall of the top of the monitoring sleeve and the air pressure monitoring component, respectively; the limiting components are slidably connected to the inner wall of the monitoring sleeve; the protective cover is detachably installed on the top of the monitoring sleeve; the control mechanism is disposed inside the protective cover and detachably installed on the top of the monitoring sleeve; the pressure relief mechanism is fixedly installed on the side wall of the monitoring sleeve and communicates with the monitoring sleeve; the pressure relief mechanism is disposed below the air pressure monitoring component.

[0009] The beneficial effects of adopting the above-mentioned further solution are: the air pressure monitoring component can be slidably installed inside the monitoring sleeve, and the monitoring sleeve is connected to the battery mechanism, which is beneficial to drive the air pressure monitoring component to move upward inside the monitoring sleeve when the air pressure inside the battery mechanism is too high, thereby cooperating with the control mechanism to alarm. The limit component is beneficial to provide guidance for the vertical movement of the air pressure monitoring component, and at the same time, it can also prevent the air pressure monitoring component from being damaged due to excessive air pressure.

[0010] Furthermore, the air pressure monitoring component includes: a piston block, a contact rod, and a touch switch; the contact rod is vertically and fixedly installed on the top of the piston block, the piston block is adapted to be disposed inside the monitoring sleeve and slidably connected to the inner wall of the monitoring sleeve, the touch switch is fixedly installed on the top of the inner wall of the monitoring sleeve, and the contact rod is coaxially disposed below the touch switch.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the piston block can drive the contact rod to approach the touch switch by moving upward when the air pressure inside the battery mechanism is too high. When the contact rod touches the touch switch, it will work with the control mechanism to realize an alarm.

[0012] Furthermore, a soft contact head is fixedly installed at the top of the contact rod.

[0013] The advantages of adopting the above-mentioned further solutions are: the soft contact head helps to avoid damage to the touch switch and increases the service life of the air pressure monitoring component.

[0014] Furthermore, the limiting assembly includes: a limiting slider, a guide rod, a movable sleeve, and a support spring; the support spring is vertically disposed within the movable sleeve, the guide rod is slidably inserted into the movable sleeve, both ends of the support spring are fixedly connected to the bottom inner wall of the movable sleeve and the bottom end of the guide rod respectively, the bottom end of the movable sleeve and the top end of the guide rod are fixedly connected to the top end of the piston block and the top end of the inner wall of the monitoring sleeve respectively, the limiting slider is horizontally fixedly installed on the side wall of the movable sleeve, and the end of the limiting slider away from the movable sleeve is slidably connected to the inner wall of the monitoring sleeve.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the cooperation between the guide rod and the movable sleeve is conducive to providing guidance for the piston block to move up and down in the monitoring sleeve; the support spring is conducive to driving the piston block to return to its original position downward in the monitoring sleeve after the air pressure drops; the limiting slider is slidably connected to the inner wall of the monitoring sleeve, which is conducive to limiting the amount of upward displacement of the piston block in the monitoring sleeve and avoiding damage to the touch switch due to excessive air pressure.

[0016] Furthermore, the upper end of the inner wall of the monitoring sleeve is provided with multiple vertical limiting grooves at intervals, and the end of the limiting slider in the multiple limiting components that is away from the movable sleeve is slidably connected to the multiple limiting grooves one by one.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the limiting slide is vertically set at the upper end of the inner wall of the monitoring sleeve, which helps to limit the upward displacement of the piston block in the monitoring sleeve and avoid damage to the touch switch due to excessive air pressure.

[0018] Furthermore, a protective net is detachably installed at the top of the protective cover.

[0019] The beneficial effects of adopting the above-mentioned further solutions are: the protective cover helps to prevent the control mechanism from being interfered with by the outside world, and the protective net helps to provide a heat dissipation channel for the normal operation of the control mechanism.

[0020] Furthermore, the pressure relief mechanism includes: a pressure relief pipe, a sealing ring, a sealing ball, a return spring, and a support ring; the pressure relief pipe is a tubular structure fixedly installed on the side wall of the pressure monitoring mechanism and connected to the pressure monitoring mechanism; the sealing ring, the sealing ball, the return spring, and the support ring are all disposed inside the pressure relief pipe; the sealing ring and the support ring are both annular structures fixedly installed on the inner wall of the pressure relief pipe; the sealing ring and the support ring are both sealed to the inner wall of the pressure relief pipe; the sealing ring is disposed close to the pressure monitoring mechanism; the diameter of the sealing ball is smaller than the inner diameter of the pressure relief pipe; the sealing ball is disposed between the sealing ring and the support ring; the two ends of the return spring are fixedly connected to the sealing ball and the support ring respectively; when the sealing ball abuts against the sealing ring, the sealing ball is sealed to the through hole on the sealing ring.

[0021] The beneficial effects of adopting the above-mentioned further solutions are: the pressure relief pipe facilitates the timely discharge of high-pressure gas in the battery mechanism through the monitoring sleeve, preventing damage to the battery from the high-pressure gas in the battery mechanism; the sealing ring and sealing ball facilitate the formation of a seal when the gas pressure in the battery mechanism is normal; the return spring and support ring, on the one hand, facilitate the application of a certain rebound force when the gas pressure in the battery mechanism is normal, so that the sealing ring and sealing ball can stick together to form a seal, and on the other hand, facilitate further compression when the gas pressure in the battery mechanism is too high, opening the through hole of the sealing ring and providing a channel for pressure relief.

[0022] Furthermore, the control mechanism includes a controller and a backup battery, and the air pressure monitoring mechanism, the auxiliary temperature monitor, and the backup battery are all connected to the controller.

[0023] The advantages of adopting the above-mentioned further solutions are: the controller is able to receive data signals from the touch switch and the auxiliary temperature monitor, thereby automatically alarming when the temperature and / or gas pressure inside the battery mechanism reaches the preset threshold in the controller; and the backup battery is able to provide backup power for the operation of the controller when the battery inside the battery mechanism fails and cannot be used.

[0024] Furthermore, the battery mechanism includes a battery housing and a plurality of batteries, the plurality of batteries being spaced apart and detachably mounted within the battery housing, and the auxiliary temperature monitor being detachably mounted on the inner wall of the battery housing.

[0025] The beneficial effect of adopting the above-mentioned further solution is that the auxiliary temperature monitor is helpful in providing temperature monitoring when the temperature sensor built into the battery mechanism fails, thereby enabling real-time monitoring of the temperature data inside the battery casing and improving the reliability of temperature monitoring. Attached Figure Description

[0026] Figure 1A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the overall structure of the battery casing after it has been opened, according to an embodiment of the present utility model.

[0028] Figure 3 A schematic diagram of the internal structure of the air pressure monitoring mechanism provided in this embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the internal structure of the limiting component provided in an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of the internal structure of the pressure relief mechanism provided in an embodiment of the present invention.

[0031] in, Figure 5 The dashed arrow indicates that high-pressure gas is being discharged from the pressure relief mechanism 2.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Pressure monitoring mechanism; 2. Pressure relief mechanism; 3. Battery mechanism; 4. Auxiliary temperature monitor; 5. Control mechanism; 11. Monitoring sleeve; 12. Limiting assembly; 13. Pressure monitoring assembly; 14. Protective cover; 21. Pressure relief pipe; 22. Sealing ring; 23. Sealing ball; 24. Return spring; 25. Support ring; 31. Battery housing; 32. Battery; 51. Controller; 52. Backup battery; 111. Limiting slide; 121. Limiting slider; 122. Guide rod; 123. Movable sleeve; 124. Support spring; 131. Piston block; 132. Contact rod; 133. Touch switch; 134. Soft contact head; 141. Protective net. Detailed Implementation

[0034] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0035] like Figures 1 to 5 As shown, this embodiment provides a power battery fire early warning device, including: a pressure monitoring mechanism 1, a pressure relief mechanism 2, an auxiliary temperature monitor 4, and a control mechanism 5; the control mechanism 5 is installed inside the pressure monitoring mechanism 1, the pressure monitoring mechanism 1 is fixedly installed on the battery mechanism 3 and communicates with the battery mechanism 3, the pressure relief mechanism 2 is fixedly installed on the pressure monitoring mechanism 1 and communicates with the pressure monitoring mechanism 1, the auxiliary temperature monitor 4 is installed inside the battery mechanism 3, and the control mechanism 5 is connected to the pressure monitoring mechanism 1, the auxiliary temperature monitor 4, and the battery mechanism 3.

[0036] The beneficial effects of this utility model are: the air pressure monitoring mechanism, in conjunction with the control mechanism, facilitates real-time monitoring of the air pressure inside the battery mechanism; the auxiliary temperature monitor, in conjunction with the control mechanism, facilitates real-time monitoring of the temperature inside the battery mechanism; when the temperature and / or gas pressure reach the preset threshold in the control mechanism, an automatic alarm is triggered, providing valuable evacuation time and reducing safety hazards by warning the driver to evacuate before dense smoke is generated; the pressure relief mechanism helps to release the pressure inside the power battery casing when the pressure inside the battery mechanism is too high, preventing damage to the battery due to excessive pressure.

[0037] Preferred, such as Figure 3 As shown, the air pressure monitoring mechanism 1 includes: a monitoring sleeve 11, multiple limiting components 12, an air pressure monitoring component 13, and a protective cover 14; the monitoring sleeve 11 is fixedly installed on the top of the battery mechanism 3 and communicates with the battery mechanism 3; the air pressure monitoring component 13 is slidably disposed inside the monitoring sleeve 11; the top and bottom ends of the limiting components 12 are fixedly connected to the inner wall of the top of the monitoring sleeve 11 and the air pressure monitoring component 13 respectively; the limiting components 12 are slidably connected to the inner wall of the monitoring sleeve 11; the protective cover 14 is detachably installed on the top of the monitoring sleeve 11; the control mechanism 5 is disposed inside the protective cover 14 and detachably installed on the top of the monitoring sleeve 11; the pressure relief mechanism 2 is fixedly installed on the side wall of the monitoring sleeve 11 and communicates with the monitoring sleeve 11; the pressure relief mechanism 2 is disposed below the air pressure monitoring component 13.

[0038] It should be noted that in the technical solution of this embodiment, the monitoring sleeve 11 is fixedly installed on the top of the battery mechanism 3 and communicates with the battery housing 31 in the battery mechanism 3; the pressure relief pipe 21 in the pressure relief mechanism 2 is horizontally fixedly installed on the side wall of the monitoring sleeve 11 and communicates with the monitoring sleeve 11.

[0039] The advantages of adopting the above preferred solution are: the air pressure monitoring component can be slidably installed inside the monitoring sleeve, and the monitoring sleeve is connected to the battery mechanism, which is beneficial to drive the air pressure monitoring component to move upward inside the monitoring sleeve when the air pressure inside the battery mechanism is too high, thereby cooperating with the control mechanism to alarm. The limit component is beneficial to provide guidance for the vertical movement of the air pressure monitoring component, and can also prevent the air pressure monitoring component from being damaged due to excessive air pressure.

[0040] Preferred, such as Figure 3As shown, the air pressure monitoring assembly 13 includes: a piston block 131, a contact rod 132, and a touch switch 133; the contact rod 132 is vertically and fixedly installed at the top of the piston block 131, the piston block 131 is adapted to be disposed inside the monitoring sleeve 11 and is slidably connected to the inner wall of the monitoring sleeve 11, the touch switch 133 is fixedly installed at the top of the inner wall of the monitoring sleeve 11, and the contact rod 132 is coaxially disposed below the touch switch 133.

[0041] It should be noted that in the technical solution of this embodiment, the touch switch 133 is a mechanical micro switch, and the internal metal spring is pressed to conduct the circuit, thereby generating an alarm signal in conjunction with the control mechanism 5.

[0042] The pressure relief mechanism 2 is installed on the side wall of the monitoring sleeve 11 below the position of the piston block 131 when the air pressure inside the battery mechanism 3 is normal, which helps to improve the detection accuracy of air pressure.

[0043] The advantages of adopting the above preferred solution are: the piston block can drive the contact rod to approach the touch switch by moving upward when the air pressure inside the battery mechanism is too high. When the contact rod touches the touch switch, it will work with the control mechanism to realize an alarm.

[0044] Preferred, such as Figure 3 As shown, a soft contact head 134 is fixedly installed at the top of the contact rod 132.

[0045] It should be noted that in the technical solution of this embodiment, the soft contact head 134 is made of silicone rubber, which is resistant to high temperature, soft and elastic, and has strong insulation, making it suitable for buffer contact and helping to avoid damage to the touch switch 133.

[0046] The advantages of adopting the above preferred solution are: the soft contact head helps to avoid damage to the touch switch and increases the service life of the air pressure monitoring component.

[0047] Preferred, such as Figure 3 and Figure 4As shown, the limiting assembly 12 includes: a limiting slider 121, a guide rod 122, a movable sleeve 123, and a support spring 124; the support spring 124 is vertically disposed inside the movable sleeve 123, the guide rod 122 is slidably inserted into the movable sleeve 123, the two ends of the support spring 124 are fixedly connected to the bottom inner wall of the movable sleeve 123 and the bottom end of the guide rod 122 respectively, the bottom end of the movable sleeve 123 and the top end of the guide rod 122 are fixedly connected to the top end of the piston block 131 and the top end of the inner wall of the monitoring sleeve 11 respectively, the limiting slider 121 is horizontally fixedly installed on the side wall of the movable sleeve 123, and the end of the limiting slider 121 away from the movable sleeve 123 is slidably connected to the inner wall of the monitoring sleeve 11.

[0048] The advantages of adopting the above-mentioned preferred solution are: the cooperation between the guide rod and the movable sleeve is conducive to providing guidance for the piston block to move up and down in the monitoring sleeve; the support spring is conducive to driving the piston block to return to its original position downward in the monitoring sleeve after the air pressure drops; the limiting slider is slidably connected to the inner wall of the monitoring sleeve, which is conducive to limiting the amount of upward displacement of the piston block in the monitoring sleeve and avoiding damage to the touch switch due to excessive air pressure.

[0049] Preferred, such as Figure 3 As shown, the upper end of the inner wall of the monitoring sleeve 11 is provided with a plurality of vertical limiting grooves 111 at intervals. The end of the limiting slider 121 in the plurality of limiting components 12 away from the movable sleeve 123 is slidably connected to the plurality of limiting grooves 111 in a one-to-one correspondence.

[0050] It should be noted that in the technical solution of this embodiment, the displacement of the limiting slider 121 in the limiting groove 111 is equal to the distance between the soft contact head 134 and the touch switch 133. That is, when the limiting slider 121 is displaced to the highest point in the limiting groove 111, the soft contact head 134 just contacts the touch switch 133 and generates an alarm signal.

[0051] The advantages of adopting the above preferred solution are: the limiting slide is vertically set at the upper end of the inner wall of the monitoring sleeve, which helps to limit the upward displacement of the piston block in the monitoring sleeve and avoid damage to the touch switch due to excessive air pressure.

[0052] Preferred, such as Figure 1 and Figure 2 As shown, a protective net 141 is detachably installed on the top of the protective cover 14.

[0053] It should be noted that in the technical solution of this embodiment, the protective cover 14 and the monitoring sleeve 11 are made of heat-insulating material to prevent high temperature damage to the control mechanism 5.

[0054] The advantages of adopting the above preferred solution are: the protective cover helps to prevent the control mechanism from being interfered with by the outside world, and the protective net helps to provide a heat dissipation channel for the normal operation of the control mechanism.

[0055] Preferred, such as Figure 3 and Figure 5 As shown, the pressure relief mechanism 2 includes: a pressure relief pipe 21, a sealing ring 22, a sealing ball 23, a return spring 24, and a support ring 25. The pressure relief pipe 21 is a tubular structure fixedly installed on the side wall of the pressure monitoring mechanism 1 and communicating with the pressure monitoring mechanism 1. The sealing ring 22, the sealing ball 23, the return spring 24, and the support ring 25 are all disposed inside the pressure relief pipe 21. The sealing ring 22 and the support ring 25 are both annular structures fixedly installed on the inner wall of the pressure relief pipe 21. Both the sealing ring 22 and the support ring 25 are sealed to the inner wall of the pressure relief pipe 21. The sealing ring 22 is located close to the air pressure monitoring mechanism 1. The diameter of the sealing ball 23 is smaller than the inner diameter of the pressure relief pipe 21. The sealing ball 23 is located between the sealing ring 22 and the support ring 25. The two ends of the return spring 24 are fixedly connected to the sealing ball 23 and the support ring 25 respectively. When the sealing ball 23 abuts against the sealing ring 22, the sealing ball 23 is sealed to the through hole on the sealing ring 22.

[0056] It should be noted that in this embodiment, when the air pressure inside the battery mechanism 3 is normal, the sealing ball 23 abuts against the sealing ring 22, and the return spring 24 is in a preliminary compressed state. That is, the rebound force of the return spring 24 forms a thrust on the sealing ball 23, thereby sealing the sealing ball 23 with the through hole on the sealing ring 22. When the air pressure inside the battery mechanism 3 is too high, on the one hand, the contact rod 132 is driven to move upward until it is released from the touch switch 133, thereby generating an alarm signal. On the other hand, a force is applied to the sealing ball 23, and the applied force is greater than the preliminary compression of the return spring 24. The thrust applied to the sealing ball 23 further compresses the return spring 24, thereby causing the sealing ball 23 to release its contact with the sealing ring 22. Consequently, the through hole on the sealing ring 22 is opened and is no longer sealed by the sealing ball 23. At this time, the high-pressure gas in the battery mechanism 3 enters the monitoring sleeve 11 from the battery housing 31 and enters the pressure relief pipe 21. It passes through the through hole on the sealing ring 22. Since the diameter of the sealing ball 23 is smaller than the inner diameter of the pressure relief pipe 21, the high-pressure gas will pass through the channel between the sealing ball 23 and the pressure relief pipe 21 and finally be discharged from the through hole on the support ring 25, thus achieving pressure relief.

[0057] In the above technical solution, since both the sealing ring 22 and the support ring 25 are annular structures, both the sealing ring 22 and the support ring 25 are provided with axial through holes.

[0058] The advantages of adopting the above-mentioned preferred scheme are: the pressure relief pipe facilitates the timely discharge of high-pressure gas in the battery mechanism through the monitoring sleeve, preventing damage to the battery from the high-pressure gas in the battery mechanism; the sealing ring and sealing ball facilitate the formation of a seal when the gas pressure in the battery mechanism is normal; the return spring and support ring, on the one hand, facilitate the application of a certain rebound force when the gas pressure in the battery mechanism is normal, so that the sealing ring and sealing ball can stick together to form a seal, and on the other hand, facilitate further compression when the gas pressure in the battery mechanism is too high, opening the through hole of the sealing ring and providing a channel for pressure relief.

[0059] Preferred, such as Figure 3 As shown, the control mechanism 5 includes a controller 51 and a backup battery 52. ​​The air pressure monitoring mechanism 1, the auxiliary temperature monitor 4, and the backup battery 52 are all connected to the controller 51.

[0060] It should be noted that in the technical solution of this embodiment, the controller 51 and the backup battery 52 are both detachably installed on the top of the monitoring sleeve 11 and are both located inside the protective cover 14. The controller 51 is a single-chip microcomputer with a built-in MCU (Microcontroller Unit). The touch switch 133 in the air pressure monitoring mechanism 1 is electrically connected to the controller 51 to realize signal transmission.

[0061] The advantages of adopting the above preferred solution are: the controller is able to receive data signals from the touch switch and the auxiliary temperature monitor, thereby automatically alarming when the temperature and / or gas pressure inside the battery mechanism reaches the preset threshold in the controller; and the backup battery is able to provide backup power for the operation of the controller when the battery inside the battery mechanism fails and cannot be used.

[0062] Preferred, such as Figure 2 As shown, the battery mechanism 3 includes a battery housing 31 and a plurality of batteries 32, the plurality of batteries 32 being spaced apart and detachably installed inside the battery housing 31, and the auxiliary temperature monitor 4 being detachably installed on the inner wall of the battery housing 31.

[0063] It should be noted that in the technical solution of this embodiment, the auxiliary temperature monitor 4 is a temperature sensor. There are multiple auxiliary temperature monitors 4, and the multiple auxiliary temperature monitors 4 are evenly and detachably installed on the inner wall of the battery housing 31, which is beneficial to improving the monitoring accuracy.

[0064] In addition, the battery mechanism 3 is equipped with a temperature sensor and a BMS (Battery Management System). The MCU in the controller 51 receives the temperature data of the battery 32 transmitted by the BMS in real time. When the BMS detects that the temperature of the battery 32 rises to a preset threshold in the controller 51, it transmits a signal to the MCU in the controller 51. At this time, the battery 32 may be at risk of being damaged. Therefore, in order to ensure normal monitoring and early warning work, the MCU controls the start of the backup battery 52 to provide stable power to the controller 51, the temperature sensor built into the battery mechanism 3, the BMS, and the auxiliary temperature monitor 4, so as to avoid the failure to provide early warning due to the abnormality of the main power supply (i.e., the battery 32).

[0065] The advantages of adopting the above preferred solution are: the auxiliary temperature monitor is beneficial for providing temperature monitoring when the temperature sensor built into the battery mechanism fails, thereby enabling real-time monitoring of the temperature data inside the battery casing and improving the reliability of temperature monitoring.

[0066] The working process of this embodiment is described below:

[0067] like Figures 1 to 5 As shown, when the temperature sensor and BMS built into the battery mechanism 3 are working normally, the MCU of the controller 51 receives the temperature data of the battery 32 transmitted by the BMS in real time. When the BMS detects that the temperature rises to the threshold preset in the controller 51, it transmits the signal to the MCU of the controller 51. If the temperature sensor built into the battery mechanism 3 or the BMS fails, the auxiliary temperature monitor 4 starts to play its role. The auxiliary temperature monitor 4 monitors the temperature inside the battery casing 31 in real time. When it detects that the temperature rises to the threshold preset in the controller 51, it transmits the signal to the MCU of the controller 51.

[0068] When the temperature inside the battery casing 31 continues to rise, the battery 32 decomposes, continuously generating gas ejection. The initial pressure of this gas is less than the initial rebound force of the return spring 24, so it cannot be discharged through the pressure relief mechanism 2, nor can it drive the piston block 131 to slide upward. As the battery 32 continues to decompose and generate gas ejection, the gas pressure inside the battery casing 31 gradually increases, gradually driving the piston block 131 to slide upward until the soft contact head 134 contacts the touch switch 133, transmitting a signal to the MCU in the controller 51. After this, if the gas pressure inside the battery casing 31 continues to increase, the increased gas pressure is greater than the initial rebound force of the return spring 24, causing the return spring 24 to be further compressed. At the same time, the through hole on the sealing ring 22 sealed by the sealing ball 23 is opened, and the gas inside the battery casing 31 will be discharged through the through hole on the sealing ring 22, the gap between the sealing ball 23 and the pressure relief pipe 21, and the through hole on the support ring 25, thus achieving pressure relief.

[0069] During the above process, after the MCU in the controller 51 receives the trigger signal from the touch switch 133 and the temperature data (whether it is the data normally transmitted by the BMS or the backup data transmitted by the auxiliary temperature monitor 4), it determines whether the temperature and / or gas pressure has reached the threshold. If the temperature and / or gas pressure has reached the threshold, the controller 51 outputs an alarm signal.

[0070] In the technical solution of this embodiment, the audible and visual alarm in the driver's cab provides timely warnings upon receiving an alarm signal, reminding the driver to evacuate quickly before the thick smoke is generated, thus buying the driver valuable evacuation time and effectively reducing safety hazards; the external alarm light is integrated into the existing vehicle lighting system, and when an alarm is triggered, the light will turn into a conspicuous red or yellow and flash dynamically to remind pedestrians not to approach.

[0071] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A power battery fire early warning device, characterized in that, include: The system comprises a pressure monitoring mechanism (1), a pressure relief mechanism (2), an auxiliary temperature monitor (4), and a control mechanism (5); the control mechanism (5) is installed inside the pressure monitoring mechanism (1), the pressure monitoring mechanism (1) is fixedly installed on the battery mechanism (3) and communicates with the battery mechanism (3), the pressure relief mechanism (2) is fixedly installed on the pressure monitoring mechanism (1) and communicates with the pressure monitoring mechanism (1), the auxiliary temperature monitor (4) is installed inside the battery mechanism (3), and the control mechanism (5) is connected to the pressure monitoring mechanism (1), the auxiliary temperature monitor (4), and the battery mechanism (3).

2. The power battery fire early warning device according to claim 1, characterized in that, The air pressure monitoring mechanism (1) includes: a monitoring sleeve (11), multiple limiting components (12), an air pressure monitoring component (13), and a protective cover (14); the monitoring sleeve (11) is fixedly installed on the top of the battery mechanism (3) and communicates with the battery mechanism (3); the air pressure monitoring component (13) is slidably disposed inside the monitoring sleeve (11); the top and bottom ends of the limiting components (12) are fixedly connected to the inner wall of the top of the monitoring sleeve (11) and the air pressure monitoring component (13) respectively. The limiting component (12) is slidably connected to the inner wall of the monitoring sleeve (11), the protective cover (14) is detachably installed on the top of the monitoring sleeve (11), the control mechanism (5) is disposed inside the protective cover (14), the control mechanism (5) is detachably installed on the top of the monitoring sleeve (11), the pressure relief mechanism (2) is fixedly installed on the side wall of the monitoring sleeve (11) and communicates with the monitoring sleeve (11), and the pressure relief mechanism (2) is disposed below the air pressure monitoring component (13).

3. The power battery fire early warning device according to claim 2, characterized in that, The air pressure monitoring component (13) includes: a piston block (131), a contact rod (132), and a touch switch (133); the contact rod (132) is vertically and fixedly installed at the top of the piston block (131), the piston block (131) is adapted to be disposed inside the monitoring sleeve (11) and is slidably connected to the inner wall of the monitoring sleeve (11), the touch switch (133) is fixedly installed at the top of the inner wall of the monitoring sleeve (11), and the contact rod (132) is coaxially disposed below the touch switch (133).

4. The power battery fire early warning device according to claim 3, characterized in that, A soft contact head (134) is fixedly installed at the top of the contact rod (132).

5. The power battery fire early warning device according to claim 3, characterized in that, The limiting component (12) includes: a limiting slider (121), a guide rod (122), a movable sleeve (123), and a support spring (124); the support spring (124) is vertically disposed inside the movable sleeve (123), and the guide rod (122) is slidably inserted into the movable sleeve (123). The two ends of the support spring (124) correspond one-to-one with the inner wall of the bottom end of the movable sleeve (123) and the guide rod (122). The bottom end of the movable sleeve (123) is fixedly connected to the top end of the guide rod (122), and the bottom end of the movable sleeve (123) and the top end of the guide rod (122) are fixedly connected to the top end of the piston block (131) and the top end of the inner wall of the monitoring sleeve (11) respectively. The limiting slider (121) is horizontally fixedly installed on the side wall of the movable sleeve (123), and the end of the limiting slider (121) away from the movable sleeve (123) is slidably connected to the inner wall of the monitoring sleeve (11).

6. The power battery fire early warning device according to claim 5, characterized in that, The upper end of the inner wall of the monitoring sleeve (11) is provided with a plurality of vertical limiting grooves (111) spaced apart in the circumferential direction. The end of the limiting slider (121) in the plurality of limiting components (12) away from the movable sleeve (123) is slidably connected to the plurality of limiting grooves (111) one by one.

7. The power battery fire early warning device according to claim 2, characterized in that, A protective net (141) is detachably installed on the top of the protective cover (14).

8. The power battery fire early warning device according to claim 1, characterized in that, The pressure relief mechanism (2) includes: a pressure relief pipe (21), a sealing ring (22), a sealing ball (23), a return spring (24), and a support ring (25); the pressure relief pipe (21) is a tubular structure fixedly installed on the side wall of the pressure monitoring mechanism (1) and connected to the pressure monitoring mechanism (1); the sealing ring (22), the sealing ball (23), the return spring (24), and the support ring (25) are all disposed inside the pressure relief pipe (21); the sealing ring (22) and the support ring (25) are both annular structures fixedly installed on the inner wall of the pressure relief pipe (21); the sealing ring (22) 22) and the support ring (25) are both sealed to the inner wall of the pressure relief pipe (21). The sealing ring (22) is set close to the air pressure monitoring mechanism (1). The diameter of the sealing ball (23) is smaller than the inner diameter of the pressure relief pipe (21). The sealing ball (23) is set between the sealing ring (22) and the support ring (25). The two ends of the return spring (24) are fixedly connected to the sealing ball (23) and the support ring (25) respectively. When the sealing ball (23) abuts against the sealing ring (22), the sealing ball (23) is sealed to the through hole on the sealing ring (22).

9. The power battery fire early warning device according to claim 1, characterized in that, The control mechanism (5) includes a controller (51) and a backup battery (52). The air pressure monitoring mechanism (1), the auxiliary temperature monitor (4) and the backup battery (52) are all connected to the controller (51).

10. A power battery fire early warning device according to any one of claims 1-9, characterized in that, The battery assembly (3) includes a battery housing (31) and a plurality of batteries (32), the plurality of batteries (32) being spaced apart and detachably mounted inside the battery housing (31), and the auxiliary temperature monitor (4) being detachably mounted on the inner wall of the battery housing (31).

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