Device for sensing local temperature abrupt change of new energy automobile chassis

Abstract

The utility model provides a new energy automobile chassis local temperature sudden change sensing device, and relates to the field of ship transportation safety, the device is composed of a plurality of chassis local temperature sudden change sensing front ends deployed in a vehicle cabin of a target ship, and the chassis local temperature sudden change sensing front ends are installed on a deck of the vehicle cabin. And the projection module is positioned in a projection area under a battery pack of the new energy automobile in a vehicle cabin. A sensing module at the chassis local temperature sudden change sensing front end collects the local real-time temperature of a new energy automobile chassis and transmits temperature voltage signals to a main control module, the main control module compares the difference value of the temperature voltage signals at different times with an alarm threshold value and then outputs temperature rise gradient alarm driving signals to an alarm module, and the alarm module sends the temperature rise gradient alarm driving signals to the new energy automobile chassis local temperature sudden change sensing front end. And the alarm module receives the temperature rise gradient alarm driving signal to give an alarm, so that a fire can be found in an early stage, the fire can be treated in time, and the loss caused by untimely fire control is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ship transportation safety, especially to a device for sensing local temperature mutation of new energy vehicle chassis. BACKGROUND

[0002] With the increase of the number of new energy vehicles, the safety problem of ferry passenger roll-on / roll-off ships or car roll-on / roll-off ships carrying new energy vehicles is increasingly prominent.

[0003] Currently, the battery faults of new energy vehicles such as overcharging, external short circuit, and electrolyte leakage, or the lithium batteries installed at the bottom of new energy vehicles absorbing heat radiated from the ground, can cause the local temperature of the chassis of new energy vehicles to rise, resulting in the increase of temperature and pressure in the battery pack of new energy vehicles, and further causing the battery to enter a thermal runaway state, which can cause the new energy vehicles to catch fire. Therefore, in order to ensure the safety of ship transportation, the temperature on the frame of the new energy vehicle can be collected by an infrared camera, and when an abnormal temperature is found, a fire alarm can be triggered so that the crew can handle the alarm in a timely manner. Alternatively, the crew can rely on on-board patrol to discover the disaster in a timely manner.

[0004] However, when an abnormal temperature is found, the fire is basically uncontrollable, and the crew has limited reaction time after the fire alarm is triggered, and the crew cannot handle the disaster in a timely manner. In addition, relying on on-board patrol by the crew is time-consuming and labor-intensive, and the crew may not be able to discover hidden or early disaster, and may also delay the best opportunity to handle the disaster, thereby causing more serious losses and impacts. Therefore, how to sense the local temperature of the chassis of new energy vehicles to ensure the safe transportation of new energy vehicles by ships is a very important problem.

[0005] Based on this, the present specification provides a device for sensing local temperature mutation of new energy vehicle chassis. CONTENT OF THE UTILITY MODEL

[0006] In order to solve the safety problems such as temperature abnormalities that may occur when new energy vehicles are transported by ships, the utility model provides a device for sensing local temperature mutation of new energy vehicle chassis, which can timely alarm the abnormal temperature of new energy vehicles.

[0007] The present specification adopts the following technical solutions:

[0008] The present specification provides a device for sensing local temperature mutation of new energy vehicle chassis, which is composed of a plurality of chassis local temperature mutation sensing front ends deployed in the vehicle cabin of a target ship. The chassis local temperature mutation sensing front end is installed on the deck of the vehicle cabin and located in the projection area directly below the battery pack of the new energy vehicle in the vehicle cabin, and includes a sensing module, a main control module, a power supply module, and an alarm module.

[0009] The sensing module is used for collecting real-time temperature of the local chassis of the new energy vehicle and transmitting a temperature voltage signal to the main control module.

[0010] The main control module is used for comparing a difference value of the temperature voltage signals at different times with an alarm threshold, and outputting a temperature rise gradient alarm driving signal to the alarm module.

[0011] The alarm module is used for receiving the temperature rise gradient alarm driving signal to alarm.

[0012] The power supply module supplies power to the sensing module, the main control module and the alarm module.

[0013] Optionally, the chassis local temperature mutation sensing front end is packaged in the inside of a target shell through a glue filling process, a window is arranged at the top of the target shell, the window is provided with a germanium-doped glass and a sealing ring, and the target shell is used for packaging the chassis local temperature mutation sensing front end.

[0014] Optionally, the sensing module is composed of a plurality of infrared temperature sensors welded on a circuit board.

[0015] Optionally, the alarm module further comprises a wireless communication chip and an antenna, and the wireless communication chip and the antenna are used for transmitting the temperature rise gradient alarm driving signal and a position signal of the chassis local temperature mutation sensing front end to an Internet of Things gateway.

[0016] Optionally, the wireless communication chip is further used for transmitting the temperature voltage signal to the Internet of Things gateway through the antenna when a result that the alarm threshold is not reached is obtained after comparison.

[0017] Optionally, the main control module is composed of an MCU single chip, is used for obtaining a difference value of temperature voltage signals at different times based on a differential amplifier, determining a temperature rise gradient according to the difference value of the temperature voltage signals, comparing the temperature rise gradient with an alarm threshold based on a comparator, outputting the temperature rise gradient alarm driving signal and the temperature voltage signal to the alarm module if the temperature rise gradient is higher than the alarm threshold, and outputting the temperature voltage signal to the alarm module if the temperature rise gradient is lower than the alarm threshold.

[0018] Optionally, in the chassis local temperature mutation sensing front end, the chassis local temperature mutation sensing front end is installed at least in front, back, left and right of the projection area of the battery pack, and the chassis local temperature mutation sensing front ends are arranged in a diamond shape.

[0019] Optionally, in the chassis local temperature mutation sensing front end, the chassis local temperature mutation sensing front end is installed at the front, back, left and right four positions of the projection area of the battery pack, and at least one chassis local temperature mutation sensing front end is installed on the boundary of the rhombus.

[0020] Optionally, at least one chassis local temperature mutation sensing front end is installed below the explosion-proof valve of the battery pack.

[0021] The above at least one technical scheme adopted in the specification can achieve the following beneficial effects:

[0022] The new energy vehicle chassis local temperature mutation sensing device provided by the specification can collect real-time temperature voltage signals of the new energy vehicle chassis local area through the chassis local temperature mutation sensing front end, and calculate the temperature voltage signal difference at different times. If the temperature rise gradient corresponding to the temperature voltage information difference exceeds the alarm threshold, a temperature rise gradient alarm driving signal is generated to the alarm module. The alarm module can transmit the temperature rise gradient alarm driving signal and the position signal to the Internet of Things gateway based on the antenna, and further send it to the monitoring device at the ship end, so as to judge whether the current new energy vehicle chassis local temperature rises too fast by comparing whether the temperature rise gradient corresponding to the temperature voltage signal difference exceeds the alarm threshold, so as to judge whether the new energy vehicle will appear battery thermal runaway. In this way, the fire can be found in the early stage of new energy vehicle battery thermal runaway, and sufficient time is left for the crew to deal with the fire, thereby reducing the loss caused by the delay in controlling the fire. At the same time, the temperature rise gradient alarm driving signal is displayed to the crew through the monitoring device, avoiding the crew to patrol the cabin, saving time and labor costs, and also improving the speed of discovering and handling the fire.

[0023] The chassis local temperature mutation sensing front end of the utility model is installed on the deck of the vehicle cabin and located in the projection area directly below the battery pack of the new energy vehicle in the vehicle cabin, and at least the chassis local temperature mutation sensing front end is installed at the front, back, left and right four positions of the projection area of the battery pack. The chassis temperature mutation sensing front end is arranged in a rhombus shape, so that when the position of the explosion-proof valve in the battery pack cannot be known, the chassis temperature mutation sensing front end is installed at the front, back, left and right four positions of the battery pack to cover the position of the explosion-proof valve in the battery pack, and is closer to the position of the explosion-proof valve, so as to more accurately collect the chassis temperature.

[0024] Further, the chassis local temperature mutation sensing front end can be installed on the four corners of the projection area of the battery pack to form the end points of a rhombus, so that the rhombus matches the projection area. When the position of the explosion-proof valve in the battery pack is known, at least one chassis local temperature mutation sensing front end can be installed on the boundary of the rhombus, so that the chassis local temperature mutation sensing front end installed on the boundary can be closer to the explosion-proof valve and more accurately collect the temperature. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the present specification, and form a part of the present specification. The illustrative embodiments of the present specification and the description thereof are used to explain the present specification, and do not constitute an improper limitation on the present specification. In the drawings:

[0026] Figure 1 A structural schematic diagram of a new energy vehicle chassis local temperature mutation sensing device provided in the present specification;

[0027] Figure 2 A schematic diagram of a packaged chassis local temperature mutation sensing front end provided in the present specification;

[0028] Figure 3 A schematic diagram of an arrangement of a chassis local temperature mutation sensing front end provided in the present specification;

[0029] Figure 4 A position schematic diagram of a chassis local temperature mutation sensing front end provided in the present specification;

[0030] Figure 5 A schematic diagram of a new energy vehicle chassis local temperature mutation sensing device provided in the present specification. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions and advantages of the present specification clearer, the technical solutions of the present specification will be described in detail below in combination with the specific embodiments of the present specification and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present specification, but not all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present specification.

[0032] The present specification provides a new energy vehicle chassis local temperature mutation sensing device. The technical solutions provided by the embodiments of the present specification will be described in detail below in combination with the drawings.

[0033] Figure 1A schematic structural view of a device for local temperature mutation sensing of a new energy vehicle chassis is provided in the specification. The device is deployed in a vehicle cabin of a target ship. The device is composed of a plurality of chassis local temperature mutation sensing front ends 100 deployed in the vehicle cabin of the target ship. The chassis local temperature mutation sensing front end is installed on the deck of the vehicle cabin and located in the projection area directly below the battery pack of the new energy vehicle in the vehicle cabin. The chassis local temperature mutation sensing front end comprises a sensing module 1001, a main control module 1002, a power supply module 1003, and an alarm module 1004.

[0034] The sensing module 1001 can collect the real-time temperature of the local chassis of the new energy vehicle and transmit the temperature voltage signal to the main control module 1002. The temperature voltage signal is used to represent the real-time temperature collected by the sensing module 1001, that is, the temperature collected at the current time. The collection period of the sensing module 1001 for collecting temperature can be the time interval sent by the Internet of Things gateway 101, that is, collecting temperature every time interval. The time interval can be a manually set value. Of course, the collection period can also be any pre-set period, which is not limited in the specification. In addition, since the battery assembly of the new energy vehicle is basically installed on the chassis of the new energy vehicle, the real-time temperature of the local chassis of the new energy vehicle collected can actually represent the battery temperature of the local chassis of the new energy vehicle. It should be noted that the sensing module 1001 is electrically connected to the main control module 1002, and the main control module 1002 is electrically connected to the alarm module 1004.

[0035] Then, the main control module 1002 can compare the temperature voltage signal difference of different times with the alarm threshold value and output the temperature rise gradient alarm driving signal to the alarm module 1004. The alarm threshold value can be sent by the Internet of Things gateway 101, and the alarm threshold value can be a manually set value. Each Internet of Things gateway 101 is wirelessly connected to at least one chassis local temperature mutation sensing front end 100, and the Internet of Things gateway 101 is installed on the top of the vehicle cabin. The Internet of Things gateway can be a F8926-L type Internet of Things gateway, and of course it can also be an Internet of Things gateway of other types, which is not limited in the specification. In addition, the Internet of Things gateway 101 is installed on the top of the vehicle cabin. The installation position of the Internet of Things gateway 101 can be any position on the top of the cabin, and can also be the center position or the near-center position of the communication area, which is the projection area of the chassis local temperature mutation sensing front end 100 on the top of the cabin for wireless communication.

[0036] Further, the master module 1002 can determine a temperature voltage signal difference value at different times, and then determine a temperature rise gradient according to the temperature voltage signal difference value. Then, the temperature rise gradient is compared with the alarm threshold value, and if it is higher than the alarm threshold value, the temperature rise gradient alarm driving information is output to the alarm module 1004. Wherein, the temperature voltage signal difference value is the difference value between two temperature voltage signals in at least one time interval, and the temperature rise gradient is the ratio between the temperature voltage signal difference value and at least one time interval. The temperature rise gradient represents the rate of change of temperature in at least one time interval. Specifically, taking one time interval as an example, the temperature rise gradient can be the rate of change of temperature from the historical time to the current time, and the time difference between the historical time and the current time is the time interval. The temperature rise gradient can be the ratio of the change amount of temperature (i.e. the temperature voltage signal difference value) from the historical time to the current time to the time interval.

[0037] The temperature rise gradient alarm driving signal is generated and sent to the alarm module 1004 when the result of reaching the alarm threshold value is obtained after comparison. The temperature rise gradient alarm driving signal is used to prompt the crew that the temperature of the new energy vehicle chassis is abnormal. When the temperature rise gradient and the alarm threshold value are compared, the result of reaching the alarm threshold value and the result of not reaching the alarm threshold value can be obtained. In addition, the master module 1002 can send the temperature voltage signal to the Internet of Things gateway 101 through the alarm module 1004 when the result of not reaching the alarm threshold value is obtained after comparison. Of course, the master module 1002 can also send the temperature voltage signal to the Internet of Things gateway 101 through the alarm module 1004 when the result of reaching the alarm threshold value is obtained after comparison.

[0038] Then, the alarm module 1004 can receive the temperature rise gradient alarm driving signal to alarm. Specifically, the alarm module 1004 can receive the temperature rise gradient alarm driving signal, and then send the temperature rise gradient alarm driving signal to the Internet of Things gateway 101. In addition, the alarm module 1004 can also send the temperature rise gradient alarm driving signal and the position signal of the chassis local temperature mutation sensing front end to the Internet of Things gateway 101. By sending the position signal of the chassis local temperature mutation sensing front end 100 and the temperature rise gradient alarm driving signal to the Internet of Things gateway 101, the crew can quickly and accurately locate the specific position of the new energy vehicle where the fire may occur, so as to avoid the crew blindly searching for the new energy vehicle where the fire may occur in the vehicle cabin, save the searching time of the crew, and make the crew can timely control the fire of the new energy vehicle, reduce the loss caused by untimely control.

[0039] The power supply module 1003 can supply power to the sensing module 1001, the main control module 1002 and the alarm module 1004. The power supply module 1003 is electrically connected to the sensing module 1001, the main control module 1002 and the alarm module 1004 respectively. The power supply module 1003 includes at least one battery or at least one battery pack. The power supply of the power supply module 1003 can last more than one year. The battery or battery pack in the power supply module 1003 can be replaced, that is, the crew can replace the battery or battery pack in the power supply module 1003 to supply power to other modules in the local temperature mutation sensing front end 100 at any time.

[0040] It should be noted that, Figure 1 The device shown includes several local temperature mutation sensing front ends, but only shows the modules included in one local temperature mutation sensing front end, that is, the sensing module 1001, the main control module 1002, the power supply module 1003 and the alarm module 1004, and only shows that the power supply module 1003 is electrically connected to the sensing module 1001, the main control module 1002 and the alarm module 1004 respectively. In addition, Figure 1 Only several Internet of Things gateways 101 connected to the local temperature mutation sensing front end 100 wirelessly are shown, but only the connection relationship between two local temperature mutation sensing front ends 100 and two Internet of Things gateways 100 is shown. Figure 1 Only for example, the number of local temperature mutation sensing front ends 100, the number of Internet of Things gateways 101 and the connection relationship between the local temperature mutation sensing front end 100 and the Internet of Things gateway 101 are not limited in this specification.

[0041] In some embodiments of the present application, since the battery pack of the new energy vehicle is designed with an explosion-proof valve to release the high-temperature gas generated in the early stage of thermal runaway, the installation position of the chassis local temperature mutation sensing front end 100 needs to be close to the position of the explosion-proof valve to more accurately collect the temperature. However, if the specific position of the explosion-proof valve in the battery pack cannot be known, and the installation position of the explosion-proof valve of different vehicle models of new energy vehicles is inconsistent, the chassis local temperature mutation sensing front end 100 can be installed in the projection area of the battery pack on the vehicle deck after the new energy vehicle is parked, i.e. the projection area directly below the battery pack, to better cover the position of the explosion-proof valve, so that the position of the chassis local temperature mutation sensing front end 100 is closer to the position of the explosion-proof valve, to more accurately collect the temperature. In addition, the size of the above-mentioned projection area can be related to the size of the battery pack. Since the size of the battery pack of different vehicle models of new energy vehicles can be different, the length of the battery pack of a general new energy vehicle is in the range of 1000-2400mm, the width is in the range of 1000-1900mm, and the height is in the range of 100-238mm. Of course, there can also be new energy vehicles with battery packs larger or smaller than this range. The length, width and height of the battery pack shown above correspond to the ranges respectively, which are only examples of a range, and the present application is not limited in this regard.

[0042] In some embodiments of the present application, since the above-mentioned chassis local temperature mutation sensing front end 100 is deployed on the deck of the vehicle cabin, it needs to have pressure resistance, dust resistance and water resistance. Based on this, the above-mentioned chassis local temperature mutation sensing front end 100 is packaged inside the target housing 102 by a glue filling process. The top end of the target housing 102 is provided with a window 1021, which is provided with a germanium-doped glass 10211 and a sealing ring 10212. The target housing 102 is used to package the chassis local temperature mutation sensing front end 100, as shown in Figure 2 Figure 2 The target housing 102 can be a spike shape, and the chassis local temperature mutation sensing front end 100 is inside the structure shown in Figure 2 Of course, the target housing 102 can also be any other shape, and the present application is not limited in this regard. Figure 2 The shape of the target housing 102 shown in

[0043] The dust and water resistance level of the above-mentioned target housing 102 is above IP67, which is a protection level standard. The top of the target housing 102 is provided with a window, i.e. Figure 2 ​The region marked as 1021 in the target shell 102 is provided with a semiconductor germanium glass (i.e., germanium-doped glass) 10211 and a sealing ring 10212, the inside of the target shell 102 is increased in water-tight protection and pressure support by a potting process, and the partial temperature mutation sensing front end 100 of the chassis is packaged in the inside of the shell by the potting process. The potting material used in the potting process is not specifically limited in the present specification.

[0044] In some embodiments of the present specification, the sensing module 1001 described above can be composed of a plurality of infrared temperature sensors welded on the circuit board. The infrared temperature sensor described above can be an infrared temperature sensor of the IRTP series, and of course can also be an infrared temperature sensor of other models. The temperature measurement range of the infrared temperature sensor is generally -40-300℃. The accuracy of the infrared temperature sensor described above is ±1℃-5℃. In addition, the temperature-sensing sensor included in the sensing module 1001 described above can be a temperature-sensing sensor of the NTC104-F model or the PT100 model in addition to the infrared temperature sensor, and the present specification is not specifically limited.

[0045] In some embodiments of the present specification, the alarm module 1004 described above can further include a wireless communication chip and an antenna, which are used to transmit the temperature rise gradient alarm driving signal to the Internet of Things gateway 100. The wireless communication chip described above can be a chip supporting Bluetooth or LoRa protocol, and of course can also be a chip supporting other communication protocols, which are not specifically limited in the present specification as long as they can communicate with the Internet of Things gateway. Since the antenna described above needs to be placed in the inside of the target shell 102, the antenna described above can be made of a bendable material. It should be noted that the wireless communication chip and the antenna described above can be welded on the circuit board described above.

[0046] Further, the wireless communication chip and the antenna included in the alarm module 1004 described above can also be used to transmit the temperature rise gradient alarm driving signal and the position signal of the partial temperature mutation sensing front end of the chassis to the Internet of Things gateway 100.

[0047] In some embodiments of the present specification, the wireless communication chip described above can also send the temperature voltage signal to the Internet of Things gateway 101 through the antenna when the comparison result is that the alarm threshold has not been reached.

[0048] In some embodiments of the present specification, the main control module described above can be composed of an MCU single chip, which is used to obtain the temperature voltage signal difference at different times based on the differential amplifier, determine the temperature rise gradient according to the temperature voltage signal difference, compare the temperature rise gradient with the alarm threshold based on the comparator, output the temperature rise gradient alarm driving signal to the alarm module 1004 if it is higher than the alarm threshold, and output the temperature voltage signal to the alarm module 1004 if it is lower than the alarm threshold.

[0049] The MCU (Microcontroller Unit) can be a chip that can realize the functions of timing query and calculation. The MCU can be welded on the circuit board. In addition, the MCU and the wireless communication chip can be separate chips, or they can be integrated into one chip, which needs to have the functions of both the MCU and the wireless communication chip. That is, the main control module 1002 can be composed of an integrated chip, and the wireless communication chip included in the bottom alarm module 1004 is actually the wireless communication chip in the integrated chip. Of course, the integrated chip can also be a single chip with a wireless communication module integrated inside. In addition, the wireless communication chip and the antenna can form a wireless communication network, and the MCU can send the temperature rise gradient alarm driving signal to the Internet of Things gateway 101 through the wireless communication network.

[0050] In addition, when the temperature rise gradient is higher than the alarm threshold, the temperature rise gradient alarm driving signal and the temperature voltage signal can be output to the alarm module 1004. Of course, the temperature rise gradient alarm driving signal, the position signal, and the temperature voltage signal can also be output to the alarm module 1004.

[0051] In some embodiments of the present application, the Internet of Things gateway 101 can be connected to the monitoring device of the target ship through Ethernet. The Internet of Things gateway 101 can send the received temperature rise gradient alarm driving signal to the monitoring device to display the temperature rise gradient alarm driving signal to the crew of the target ship through the monitoring device. The target ship can be any ship that can be used to transport new energy vehicles, and the type of the target ship is not limited in the present application. The Internet of Things gateway 101 can forward the received temperature rise gradient alarm driving signal to the monitoring device through Ethernet, and of course, other communication methods can also be used to send the received temperature rise gradient alarm driving signal to the monitoring device, which is not limited in the present application. The monitoring device can be a monitoring system server at the target ship, i.e., a ship-end monitoring system server. The monitoring device can notify the crew of the abnormal temperature of the new energy vehicle chassis through display. In addition, the Internet of Things gateway 101 can send the position signal of the chassis local temperature mutation sensing front end to the monitoring device in addition to sending the temperature rise gradient alarm driving signal to the monitoring device.

[0052] When the Internet of Things gateway 101 forwards the received temperature rise gradient alarm driving signal (or the temperature rise gradient alarm driving signal and the position signal, or the temperature rise gradient alarm driving signal, the temperature voltage signal and the position signal) to the monitoring device through Ethernet, the Internet of Things gateway 101 includes at least one Ethernet interface, and the Internet of Things gateway 101 can be connected with the Ethernet port of the monitoring device through the Ethernet interface to enable communication between the Internet of Things gateway 101 and the monitoring device. The monitoring device includes at least one Ethernet port. Of course, the monitoring device can also be connected with the Ethernet interface of the Internet of Things gateway 101 through an Ethernet switch, which is not specifically limited in the present description. The Ethernet interface can be an RJ45 interface.

[0053] In some embodiments of the present description, the alarm module 1004 can also transmit the temperature voltage signal together with the temperature rise gradient alarm driving signal to the Internet of Things gateway 101 when transmitting the temperature rise gradient alarm driving signal to the Internet of Things gateway 101. Of course, the position signal, the temperature voltage signal and the temperature rise gradient alarm driving signal can also be transmitted together to the Internet of Things gateway 101.

[0054] In some embodiments of the present description, the communication protocol between the Internet of Things gateway 101 and the chassis local temperature sudden change sensing front end 100 (or the alarm module 1004) can be a LoRa (Long Range) protocol, and can also be a Bluetooth protocol, which is not specifically limited in the present description. LoRa (Long Range) is a low-power wide-area network (LPWAN, Low Power Wide Area Network) technology for wireless communication. When the communication protocol between the Internet of Things gateway 101 and the chassis local temperature sudden change sensing front end 100 (or the alarm module 1004) is a LoRa (Long Range) protocol, the Internet of Things gateway 101 can be an Internet of Things LoRa gateway, i.e., an Internet of Things gateway supporting the LoRa protocol. However, when the communication protocol between the Internet of Things gateway 101 and the chassis local temperature sudden change sensing front end 100 (or the alarm module 1004) is a Bluetooth protocol, the Internet of Things gateway 101 can be an Internet of Things Bluetooth gateway, i.e., an Internet of Things gateway supporting Bluetooth communication.

[0055] In some embodiments of the present specification, in order to better cover the position of the explosion-proof valve, at least four chassis local temperature mutation sensing front ends 100 are arranged in the projection area of the battery pack of each new energy vehicle on the deck of the vehicle cabin, and the at least four chassis local temperature mutation sensing front ends 100 are arranged in a diamond shape, that is, in the chassis local temperature mutation sensing front end 100, at least four chassis local temperature mutation sensing front ends are installed in the front, back, left and right four directions of the projection area of the battery pack, and the chassis local temperature mutation sensing front end 100 is arranged in a diamond shape. When only four chassis local temperature mutation sensing front ends 100 are installed in the projection area, each chassis local temperature mutation sensing front end 100 is at the midpoint of each side of the projection area, so that the diamond formed matches the projection area, so in the chassis local temperature mutation sensing front end 100, the chassis local temperature mutation sensing front end 100 is installed at the endpoints of the diamond formed in the front, back, left and right four directions of the projection area of the battery pack, and the endpoints can be the midpoints of the sides of the projection area. As shown in Figure 3 , Figure 3 is a schematic diagram of the arrangement of a chassis local temperature mutation sensing front end provided in the present specification. Figure 3 includes four chassis local temperature mutation sensing front ends 100, Figure 3 The area A in the figure is the projection area of the battery pack, and the four chassis local temperature mutation sensing front ends 100 are respectively located at the midpoints of the four sides of the area A, and the four chassis local temperature mutation sensing front ends 100 are arranged in a diamond shape, that is, the four chassis local temperature mutation sensing front ends 100 form a diamond (i.e. area B). By installing the chassis temperature mutation sensing front end 100 in this way, when the position of the explosion-proof valve in the battery pack cannot be determined, the chassis local temperature mutation sensing front end 100 is installed in the front, back, left and right four directions of the battery pack, so as to better cover the position of the explosion-proof valve in the battery pack, and be closer to the position of the explosion-proof valve, so as to better and more accurately collect the chassis temperature.

[0056] But when the position of the explosion-proof valve can be determined, the number of chassis local temperature mutation sensing front ends 100 can be increased on the basis of the above-mentioned four chassis local temperature mutation sensing front ends 100, and the installation positions of the increased chassis local temperature mutation sensing front ends 100 can be on the sides of the above-mentioned rhombus composed of four chassis local temperature mutation sensing front ends 100, and the installation positions are related to the position of the explosion-proof valve, that is, at least one chassis local temperature mutation sensing front end 100 is installed on the boundary of the rhombus. Specifically, according to the position of the explosion-proof valve, the shortest side in the rhombus from the explosion-proof valve is determined, and the respective distances between the position points on the shortest side and the explosion-proof valve are determined, and the above-mentioned increased chassis local temperature mutation sensing front end 100 is installed on the position point corresponding to the shortest distance. Of course, in addition to installing the above-mentioned chassis local temperature mutation sensing front end 100 on the position point corresponding to the shortest distance, the above-mentioned chassis local temperature mutation sensing front end 100 can also be installed on the position point corresponding to the distance within the preset range, which is not limited in the specification.

[0057] In addition, the above-mentioned chassis local temperature mutation sensing front end 100 can also be installed in the orthographic projection area below the explosion-proof valve of the battery pack to accurately collect the temperature near the explosion-proof valve. Therefore, at least one chassis local temperature mutation sensing front end is installed in the orthographic projection area below the explosion-proof valve of the battery pack. The size of the orthographic projection area is related to the size of the explosion-proof valve. Specifically, as shown in Figure 4 Figure 4 is a schematic diagram of the position of a chassis local temperature mutation sensing front end provided in the specification, Figure 4 includes a battery pack 103, an explosion-proof valve 104, and five chassis local temperature mutation sensing front ends 100, wherein four chassis local temperature mutation sensing front ends 100 are located at the vertices of a rhombus, and one chassis local temperature mutation sensing front end 100 is located in the orthographic projection area of the explosion-proof valve 104 (i.e. Figure 4 the area C in Figure 4 Area A in

[0058] In some embodiments of the specification, the projection area of the above-mentioned battery pack on the deck is basically a regular rectangular area, but if the above-mentioned projection area is not a regular rectangular area, the circumscribed rectangular area or the minimum rectangular boundary box of the determined projection area can be used as the installation area of the chassis local temperature mutation sensing front end 100.

[0059] In some embodiments of the specification, as shown in Figure 5 Figure 5 is a schematic diagram of a new energy vehicle chassis local temperature mutation sensing device provided in the specification, Figure 5 ​​Only take the device including 24 chassis local temperature mutation sensing front ends 100 as an example for description, and the 24 chassis local temperature mutation sensing front ends 100 are respectively in wireless communication connection with 2 Internet of Things gateways 101. In addition, Figure 5 It is also shown that there are 6 new energy vehicles in the vehicle cabin, and the projection area of the battery pack of each new energy vehicle on the deck of the vehicle cabin (i.e. Figure 5 the area composed of dashed lines below each new energy vehicle) is installed with 4 chassis local temperature mutation sensing front ends 100, and each chassis local temperature mutation sensing front end 100 is at the midpoint of each side of the projection area. Figure 5 Only for example, the present specification does not limit the number of Internet of Things gateways 101 and chassis local temperature mutation sensing front ends 100 included in the device. Figure 5 The dashed line between the Internet of Things gateway 101 and the chassis local temperature mutation sensing front end 100 in the above represents wireless communication. In addition, Figure 5 The device shown in the figure is in wireless communication connection with 12 chassis local temperature mutation sensing front ends 100 and one Internet of Things gateway 101. Each Internet of Things gateway 101 is installed on the roof of the vehicle cabin, and is installed at a position close to the center of the projection area (i.e. the communication area) directly above the 12 chassis local temperature mutation sensing front ends 100 in communication therewith.

[0060] The above is only an embodiment of the present specification and is not used to limit the present specification. The present specification can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present specification shall be included in the scope of claims of the present specification.

Claims

1. A device for sensing local temperature mutation of a new energy vehicle chassis, characterized in that, The device is composed of several chassis local temperature mutation sensing front ends deployed in the vehicle cabin of the target ship, which are installed on the deck of the vehicle cabin and located in the projection area directly below the battery pack of the new energy vehicle, including a sensing module, a main control module, a power supply module and an alarm module. The sensing module is used to collect the real-time temperature of the chassis local part of the new energy vehicle and transmit the temperature voltage signal to the main control module. The main control module is used to compare the temperature voltage signal difference at different times with the alarm threshold and output the temperature rise gradient alarm driving signal to the alarm module. The alarm module is used to receive the temperature rise gradient alarm driving signal for alarm. The power supply module supplies power to the sensing module, the main control module and the alarm module.

2. The apparatus of claim 1, wherein, The chassis local temperature mutation sensing front end is packaged inside the pre-set target shell by the glue filling process, the top end of the target shell is provided with a window, the window is provided with a germanium-doped glass and a sealing ring, and the target shell is used to package the chassis local temperature mutation sensing front end.

3. The apparatus of claim 1, wherein, The sensing module is composed of several infrared temperature sensors welded on the circuit board.

4. The apparatus of claim 1, wherein, The alarm module further includes a wireless communication chip and an antenna, which are used to transmit the temperature rise gradient alarm driving signal and the position signal of the chassis local temperature mutation sensing front end to the Internet of Things gateway.

5. The apparatus of claim 4, wherein, The wireless communication chip is also used to send the temperature voltage signal to the Internet of Things gateway through the antenna when the comparison result does not reach the alarm threshold.

6. The apparatus of claim 1, wherein, The main control module is composed of an MCU single chip, which is used to obtain the temperature voltage signal difference at different times based on a differential amplifier, determine the temperature rise gradient according to the temperature voltage signal difference, compare the temperature rise gradient with the alarm threshold based on a comparator, output the temperature rise gradient alarm driving signal and the temperature voltage signal to the alarm module if it is higher than the alarm threshold, and output the temperature voltage signal to the alarm module if it is lower than the alarm threshold.

7. The apparatus of claim 1, wherein, In the chassis local temperature mutation sensing front end, at least one chassis local temperature mutation sensing front end is installed in the front, rear, left and right four directions of the projection area of the battery pack, and the chassis local temperature mutation sensing front ends are arranged in a diamond shape.

8. The apparatus of claim 7, wherein, In the chassis local temperature mutation sensing front end, the chassis local temperature mutation sensing front ends are installed on the endpoints of the diamond formed in the front, rear, left and right four directions of the projection area of the battery pack, and at least one chassis local temperature mutation sensing front end is installed on the boundary of the diamond.

9. The apparatus of claim 7, wherein, At least one chassis local temperature mutation sensing front end is installed in the direct projection area below the explosion-proof valve of the battery pack.

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