System and method for sensing local temperature abrupt change of new energy automobile chassis

Abstract

The invention provides a new energy automobile chassis local temperature sudden change sensing system and method, and relates to the field of ship transportation safety, the system is deployed in a vehicle cabin of a target ship, and the system comprises a plurality of chassis local temperature sudden change sensing modules and a plurality of Internet of Things gateways, the chassis local temperature abrupt change sensing module is installed on a deck of a vehicle cabin and located in a projection area under a battery pack of the new energy vehicle in the vehicle cabin, the chassis local temperature abrupt change sensing module is in wireless communication connection with the Internet of Things gateway, and the chassis local temperature abrupt change sensing module collects local real-time temperature of a chassis of the new energy vehicle and sends the local real-time temperature to the Internet of Things gateway; and according to the real-time temperature, the temperature rise gradient at the time interval is calculated. When the temperature rise gradient exceeds an alarm threshold value, alarm information is generated, and the alarm information is sent to monitoring equipment at a ship end through an Internet of Things gateway, so that a fire behavior is found in the early stage of thermal runaway of the battery, sufficient time is reserved for sailors to deal with and handle the fire behavior, and losses caused by untimely fire behavior control are reduced.

Description

Technical Field

[0001] This specification relates to the field of ship transportation safety, and particularly to a system and method for perceiving local temperature mutation of a new energy vehicle chassis. Background Art

[0002] With the increase in the ownership of new energy vehicles, the safety issues of ferry passenger and ro-ro ships or vehicle ro-ro ships carrying new energy vehicles have become increasingly prominent.

[0003] Currently, battery failures of new energy vehicles such as overcharging, external short circuit, and electrolyte leakage, or lithium batteries installed at the bottom of new energy vehicles absorbing heat radiated from the ground, will cause local temperature rise of the new energy vehicle chassis, resulting in increased temperature and pressure inside the battery pack of the new energy vehicle, and then leading to the battery entering a thermal runaway state, causing the new energy vehicle to catch fire. Therefore, to ensure ship transportation safety, the temperature on the vehicle frame of the new energy vehicle can be collected through an infrared camera, and when an abnormal temperature is detected, a fire alarm can be triggered so that the crew can handle the alarm in a timely manner. Or rely on the crew to conduct in-cabin inspections to detect disasters in a timely manner.

[0004] However, when an abnormal temperature is detected, the fire has basically become uncontrollable, and the reaction time left for the crew after the fire alarm is triggered is limited, and the crew cannot handle the disaster in a timely manner. In addition, relying on the crew to conduct in-cabin inspections is time-consuming and laborious, and it is also difficult for the crew to detect hidden or early disasters, and it is extremely easy to delay the best time for disaster handling, resulting in more serious losses and impacts. Therefore, how to perceive the local temperature mutation of the new energy vehicle chassis to ensure the safe transportation of new energy vehicles by ships is a very important issue.

[0005] Based on this, this specification provides a system for perceiving local temperature mutation of a new energy vehicle chassis. Summary of the Invention

[0006] This specification provides a system and method for perceiving local temperature mutation of a new energy vehicle chassis to partially solve the above problems existing in the prior art.

[0007] This specification adopts the following technical solutions:

[0008] This specification provides a system for perceiving local temperature mutation of a new energy vehicle chassis. The system is deployed in the vehicle cabin of the target ship. The system includes a number of local chassis temperature mutation sensing modules and a number of Internet of Things gateways; the local chassis temperature mutation sensing modules are installed on the deck of the vehicle cabin and are located in the projection area directly below the battery pack of the new energy vehicle in the vehicle cabin. The local chassis temperature mutation sensing modules are wirelessly communicatively connected to the Internet of Things gateways, where:

[0009] The Internet of Things gateway is used to send the preset alarm threshold and time interval to the local chassis temperature mutation sensing module;

[0010] The local chassis temperature mutation sensing module includes: a temperature sensing sub-module that collects the real-time temperature of a local part of the new energy vehicle chassis, a temperature rise gradient calculation sub-module that determines the temperature rise gradient within the time interval according to the real-time temperature, an alarm information generation sub-module that generates alarm information when the temperature rise gradient reaches the alarm threshold, and a data transmission sub-module that sends the alarm information to the Internet of Things gateway;

[0011] The Internet of Things gateway, each Internet of Things gateway is wirelessly connected to at least one local chassis temperature mutation sensing module, and is used to send the received alarm information to the monitoring device of the target cabin, so as to display the alarm information to the crew of the target ship through the monitoring device.

[0012] Optionally, the data transmission sub-module is further used to send the real-time temperature to the Internet of Things gateway when the temperature rise gradient does not reach the alarm threshold.

[0013] Optionally, the local chassis temperature mutation sensing module is composed of an infrared sensor, an MCU single-chip microcomputer, a wireless communication chip and an antenna welded on a circuit board;

[0014] The temperature sensing sub-module is composed of at least one infrared sensor and is used to collect the real-time temperature of a local part of the new energy vehicle chassis;

[0015] The temperature rise gradient calculation sub-module is based on the MCU single-chip microcomputer and is used to determine the temperature rise gradient within the time interval according to the real-time temperature;

[0016] The alarm information generation sub-module is based on the MCU single-chip microcomputer and is used to generate alarm information when the temperature rise gradient reaches the alarm threshold;

[0017] The data transmission sub-module is used to send the alarm information to the Internet of Things gateway through the wireless communication chip and the antenna.

[0018] Optionally, the alarm information generation sub-module is specifically used to generate alarm information according to the position of the local chassis temperature mutation sensing module when the temperature rise gradient reaches the alarm threshold.

[0019] Optionally, the temperature rise gradient calculation sub-module is specifically used to determine the historical temperature before the time interval; determine the temperature rise gradient within the time interval according to the real-time temperature and the historical temperature.

[0020] Optionally, in the chassis local temperature mutation sensing module, the chassis local temperature mutation sensing module is installed at least at four positions of the front, back, left, and right of the projection area of the battery pack, and the chassis local temperature mutation sensing modules are arranged in a diamond shape.

[0021] Optionally, in the chassis local temperature mutation sensing module, the chassis local temperature mutation sensing module is installed at the endpoints of the diamond formed by the four positions of the front, back, left, and right of the projection area of the battery pack, and further includes: installing at least one chassis local temperature mutation sensing module on the boundary of the diamond.

[0022] This specification provides a method for sensing local temperature mutation of a new energy vehicle chassis. The method is applied to any chassis local temperature mutation sensing module in a system for sensing local temperature mutation of a new energy vehicle chassis. The system is deployed in the vehicle compartment of a target ship. The system includes several chassis local temperature mutation sensing modules and several Internet of Things gateways. The chassis local temperature mutation sensing modules are installed on the deck of the vehicle compartment and are located in the projection area directly below the battery pack of the new energy vehicle in the vehicle compartment. The chassis local temperature mutation sensing modules are wirelessly communicatively connected to the Internet of Things gateways. Each Internet of Things gateway is wirelessly connected to at least one chassis local temperature mutation sensing module. The method includes:

[0023] Receiving a pre-set alarm threshold and time interval sent by the Internet of Things gateway;

[0024] Collecting the real-time temperature of the local part of the new energy vehicle chassis, and determining the temperature rise gradient within the time interval according to the real-time temperature;

[0025] When the temperature rise gradient reaches the pre-set alarm threshold, generating an alarm message and sending the alarm message to the Internet of Things gateway, so as to send the alarm message to the monitoring device of the target ship through the Internet of Things gateway, so that the monitoring device displays the alarm message to the crew of the target ship.

[0026] Optionally, the method further includes:

[0027] When the temperature rise gradient does not reach the alarm threshold, sending the real-time temperature to the Internet of Things gateway.

[0028] Optionally, when the temperature rise gradient reaches the pre-set alarm threshold, generating an alarm message specifically includes:

[0029] When the temperature rise gradient reaches the alarm threshold, generating an alarm message according to the position of the chassis local temperature mutation sensing module.

[0030] Optionally, according to the real-time temperature, determine the temperature rise gradient at the time interval, specifically including:

[0031] Determine the historical temperature before the time interval;

[0032] According to the real-time temperature and the historical temperature, determine the temperature rise gradient at the time interval.

[0033] The above at least one technical solution adopted in this specification can achieve the following beneficial effects:

[0034] The system for perceiving local temperature mutation of a new energy vehicle chassis provided in this specification can collect the real-time temperature of the local part of the new energy vehicle chassis through the local temperature mutation sensing module of the chassis, and calculate the temperature rise gradient at the time interval according to the real-time temperature. When the temperature rise gradient exceeds the alarm threshold, an alarm message is generated, and the alarm message is sent to the monitoring device at the ship end through the Internet of Things gateway. By comparing whether the temperature rise gradient exceeds the alarm threshold, it is judged whether the local temperature of the current new energy vehicle chassis rises too fast, so as to judge whether the new energy vehicle will have a battery thermal runaway situation, so that a fire can be detected in the early stage of the battery thermal runaway of the new energy vehicle, and sufficient time is left for the crew to respond to and handle the fire, reducing the losses caused by untimely fire control. At the same time, the alarm message is displayed to the crew through the monitoring device, avoiding the crew from patrolling the cabin, saving time cost and labor cost, and also improving the speed of discovering and handling the fire.

[0035] The local temperature mutation sensing module of the chassis of the present invention is installed on the deck of the vehicle cabin and is located in the projection area directly below the battery pack of the new energy vehicle in the vehicle cabin, and at least four chassis local temperature mutation sensing modules are installed in the front, back, left and right directions of the projection area of the battery pack. The chassis temperature mutation sensing modules are arranged in a diamond shape, so that when the position of the explosion-proof valve in the battery pack is unknown, by installing chassis temperature mutation sensing modules in the front, back, left and right directions of the battery pack, the position of the explosion-proof valve in the battery pack can be covered, and the position of the explosion-proof valve can be approached more closely to collect the chassis temperature more accurately.

[0036] Further, the local temperature mutation sensing module of the chassis can be installed at the endpoints of the diamond formed by the four directions of the front, back, left and right of the projection area of the battery pack, so that the formed diamond matches the projection area. And when the position of the explosion-proof valve in the battery pack is known, at least one local temperature mutation sensing module of the chassis can be directly installed on the boundary of the diamond, so that the local temperature mutation sensing module installed on the boundary can be closer to the explosion-proof valve and collect the temperature more accurately. Description of the Drawings

[0037] The accompanying drawings described herein are used to provide a further understanding of the present specification, form a part of the present specification, and the schematic embodiments and descriptions thereof are used to explain the present specification without unduly limiting the present specification. In the drawings:

[0038] Figure 1 It is a schematic structural diagram of a system for perceiving local temperature mutation of a new energy vehicle chassis provided in the present specification;

[0039] Figure 2 It is a schematic diagram of a packaged local temperature mutation sensing module for a chassis provided in the present specification;

[0040] Figure 3 It is a schematic diagram of a system for perceiving local temperature mutation of a new energy vehicle chassis provided in the present specification;

[0041] Figure 4 It is a working flow chart of a system for perceiving local temperature mutation of a new energy vehicle chassis provided in the present specification;

[0042] Figure 5 It is a schematic flow chart of a method for perceiving local temperature mutation of a new energy vehicle chassis provided in the present specification. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the present specification clearer, the technical solutions of the present specification will be clearly and completely described below in conjunction with the specific embodiments of the present specification and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present specification, rather than all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present specification.

[0044] The present specification provides a system and method for perceiving local temperature mutation of a new energy vehicle chassis. The following will describe in detail the technical solutions provided by each embodiment of the present specification in conjunction with the drawings.

[0045] Figure 1 It is a schematic structural diagram of a system for perceiving local temperature mutation of a new energy vehicle chassis provided in the present specification. This system is deployed in the vehicle cabin of the target ship. The system includes a number of local temperature mutation sensing modules 100 for the chassis and a number of Internet of Things gateways 101. The local temperature mutation sensing modules 100 for the chassis are installed on the deck of the vehicle cabin and are located in the projection area directly below the battery pack of the new energy vehicle in the vehicle cabin. The local temperature mutation sensing modules for the chassis are wirelessly communicatively connected to the Internet of Things gateways. It should be noted that, Figure 1The system shown includes a number of chassis local temperature mutation sensing modules 100 and a number of Internet of Things gateways 101. Among them, only one chassis local temperature mutation sensing module 100 included in each chassis local temperature mutation sensing module 100 is shown, that is, the temperature sensing sub-module 1001, the temperature rise gradient calculation sub-module 1002, the alarm information generation sub-module 1003, and the data transmission sub-module 1004. And only part of the wireless communication connection between the chassis local temperature mutation sensing modules 100 and the Internet of Things gateways 101 is shown. Figure 1 For example only, this specification does not limit the number of Internet of Things gateways 101 and chassis local temperature mutation sensing modules 100 included in the system, nor the connection relationship between the Internet of Things gateways 101 and the chassis local temperature mutation sensing modules 100.

[0046] First, the above-mentioned Internet of Things gateway 101 can send the pre-set alarm threshold and time interval to the chassis local temperature mutation sensing module 100. Among them, the alarm threshold and time interval can be any values pre-set manually. The above-mentioned Internet of Things gateway 101 can be any Internet of Things gateway 101 in the system, and this Internet of Things gateway 101 is wirelessly connected to the following chassis local temperature mutation sensing module 100. Each of the above-mentioned Internet of Things gateways 101 can be wirelessly connected to at least one chassis local temperature mutation sensing module 100, and the communication method is wireless communication. In addition, the above-mentioned Internet of Things gateway 101 is installed on the top of the vehicle cabin. The installation position of this Internet of Things gateway 101 can be any position on the top of the cabin, or the central position of the communication area, or the near-central position. This communication area is the projection area on the top of the cabin of the chassis local temperature mutation sensing module 100 that communicates with it wirelessly.

[0047] Secondly, the above-mentioned chassis local temperature mutation sensing module 100 includes a temperature sensing sub-module 1001 that collects the real-time temperature of a local part of the new energy vehicle chassis, a temperature rise gradient calculation sub-module 1002 that determines the temperature rise gradient within a time interval based on the real-time temperature, an alarm information generation sub-module 1003 that generates alarm information when the temperature rise gradient reaches the alarm threshold, and a data transmission sub-module 1004 that sends the alarm information to the Internet of Things gateway 101. Among them, since explosion-proof valves are designed for the battery packs of new energy vehicles to vent the high-temperature gas generated inside at the early stage of thermal runaway through the explosion-proof valves, the installation position of the chassis local temperature mutation sensing module 100 needs to be close to the position of the explosion-proof valve to collect the temperature more accurately. However, if the specific position of the explosion-proof valve in the battery pack cannot be known and the installation positions of the explosion-proof valves of new energy vehicles of different models are inconsistent, after the new energy vehicle is parked, the projection area of the battery pack of the new energy vehicle on the vehicle cabin deck, that is, the projection area directly below the battery pack, can be determined, and then the chassis local temperature mutation sensing module 100 can be installed in the projection area to better cover the position of the explosion-proof valve, making the position of the chassis local temperature mutation sensing module 100 closer to the position of the explosion-proof valve to collect the temperature more accurately.

[0048] The above-mentioned temperature sensing sub-module 1001 can collect the temperature of a local part of the new energy vehicle chassis in real time, that is, the real-time temperature, and this real-time temperature can be the temperature collected at the current moment. The collection period of the temperature collected by the temperature sensing sub-module 1001 can be the time interval sent by the above-mentioned Internet of Things gateway 101, that is, the temperature is collected every such time interval. Of course, this collection period can also be any pre-set period, which is not specifically limited in this 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 part of the new energy vehicle chassis collected above can actually be characterized as the battery temperature of the local part of the new energy vehicle chassis. The above-mentioned alarm information is used to prompt the crew that the temperature of the new energy vehicle chassis is abnormal.

[0049] The above-mentioned temperature rise gradient represents the change rate of temperature within a time interval, that is, the change rate of temperature within the time from the historical moment to the current moment, and the time difference between the historical moment and the current moment is the time interval. The temperature rise gradient can be the ratio of the temperature change amount within the time from the historical moment to the current moment to the time interval. Therefore, when determining the temperature rise gradient within a time interval based on the real-time temperature, the temperature rise gradient calculation sub-module 1002 can determine the historical temperature before the time interval. Then, based on the real-time temperature and the historical temperature, the temperature rise gradient within the time interval is determined. Among them, the historical temperature is the temperature collected at the historical moment, the historical moment is earlier than the current moment, and the time difference between the historical moment and the current moment is the time interval.

[0050] When determining the temperature rise gradient within a time interval based on the real-time temperature and the historical temperature, the temperature rise gradient calculation sub-module 1002 can determine the temperature difference between the real-time temperature and the historical temperature, and then determine the ratio of the temperature difference to the time interval, which is used as the temperature rise gradient. Among them, the temperature difference is the difference between the real-time temperature and the historical temperature (real-time temperature minus historical temperature).

[0051] Then, the above-mentioned Internet of Things gateway 101 can send the received alarm information to the monitoring device of the target cabin, so that the alarm information can be displayed to the crew of the target ship through the monitoring device. Among them, 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 specifically limited in this specification. The above-mentioned Internet of Things gateway 101 can forward the received alarm information to the monitoring device through Ethernet. Of course, other communication methods can also be used to send the received alarm information to the monitoring device, which is not specifically limited in this specification. The above-mentioned monitoring device can be the monitoring system server at the target ship end, that is, the ship-end monitoring system server. The monitoring device can notify the crew of the abnormal temperature of the new energy vehicle chassis by means of display.

[0052] In some embodiments of this specification, the above-mentioned alarm information may include the position of the chassis local temperature mutation sensing module. Therefore, when the temperature rise gradient reaches the alarm threshold and the alarm information is generated, the above-mentioned alarm information generation sub-module 1003 can generate the alarm information according to the position of the chassis local temperature mutation sensing module 100 when the temperature rise gradient reaches the alarm threshold. By displaying the alarm information including the position of the chassis local temperature mutation sensing module 100 to the crew, the crew can quickly and accurately locate the specific position of the new energy vehicle where a fire may occur, avoiding the crew blindly searching for the new energy vehicle where a fire may occur in the vehicle cabin, saving the crew's search time, enabling the crew to timely control the fire of the new energy vehicle, and reducing the losses caused by untimely control. In addition, the above-mentioned alarm information may also include the real-time temperature. Therefore, the above-mentioned alarm information generation sub-module 1003 can also generate the alarm information according to the position of the chassis local temperature mutation sensing module 100 and the real-time temperature.

[0053] In some embodiments of this specification, the above-mentioned data transmission sub-module 1004 can also send the real-time temperature to the Internet of Things gateway 101 when the temperature rise gradient does not reach the alarm threshold.

[0054] In some embodiments of this specification, the communication protocol between the above-mentioned Internet of Things gateway 101 and the chassis local temperature mutation sensing module 100 can be the LoRa (Long Range) protocol or the Bluetooth protocol, and this specification does not make specific limitations. 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 mutation sensing module 100 is the LoRa (Long Range) protocol, the above-mentioned Internet of Things gateway 101 can be an Internet of Things LoRa gateway, but when the communication protocol between the Internet of Things gateway 101 and the chassis local temperature mutation sensing module 100 is the Bluetooth protocol, the above-mentioned Internet of Things gateway 101 can be an Internet of Things Bluetooth gateway.

[0055] In some embodiments of this specification, the above-mentioned chassis local temperature mutation sensing module 100 can be composed of an infrared sensor, an MCU single-chip microcomputer, a wireless communication chip, and an antenna welded on a circuit board. The above-mentioned temperature sensing sub-module 1001 can be composed of at least one infrared sensor and can collect the real-time temperature of a local part of the new energy vehicle chassis. The above-mentioned temperature rise gradient calculation sub-module 1002 can, based on the MCU single-chip microcomputer, determine the temperature rise gradient at a time interval according to the real-time temperature. The above-mentioned alarm information generation sub-module 1003 can, based on the MCU single-chip microcomputer, generate alarm information when the temperature rise gradient reaches the alarm threshold. The above-mentioned data transmission sub-module 1004 can send the alarm information to the Internet of Things gateway through the wireless communication chip and the antenna. Among them, the accuracy of the above-mentioned infrared sensor is within ±1°C to 5°C. The above-mentioned infrared sensor, MCU single-chip microcomputer, wireless communication chip, and antenna are all common components, and this specification does not make specific limitations on the structures of these components themselves. The MCU (Microcontroller Unit) single-chip microcomputer and the wireless communication chip can be separate chips or integrated into one chip, that is, the above-mentioned chassis local temperature mutation sensing module 100 can also be composed of an infrared sensor, an integrated chip, and an antenna welded on a circuit board. The integrated chip is composed of an MCU single-chip microcomputer and a wireless communication chip. Specifically, what the above-mentioned chassis local temperature mutation sensing module 100 is composed of is not specifically limited in this specification. In addition, the above-mentioned wireless communication chip and the antenna can form a wireless communication network, and the above-mentioned data transmission sub-module 1004 can send the alarm information to the Internet of Things gateway 101 through the wireless communication network.

[0056] In some embodiments of this specification, in order to better cover the position of the explosion-proof valve, at least four chassis local temperature mutation sensing modules 100 are deployed 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 modules 100 are arranged in a rhombus. That is, in the chassis local temperature mutation sensing module 100, the chassis local temperature mutation sensing modules are installed at least in the front, rear, left, and right four directions of the projection area of the battery pack, and the chassis local temperature mutation sensing module 100 is arranged in a rhombus. When only four chassis local temperature mutation sensing modules 100 are installed in the projection area, each chassis local temperature mutation sensing module 100 is at the midpoint of each side of the projection area, so that the formed rhombus matches the projection area. Therefore, in the chassis local temperature mutation sensing module 100, the chassis local temperature mutation sensing module 100 is installed at the endpoints of the rhombus formed in the front, rear, left, and right four directions of the projection area of the battery pack, and the endpoint can be the midpoint of the side of the projection area. By installing the chassis temperature mutation sensing module 100 in this way, when the position of the explosion-proof valve in the battery pack cannot be determined, by installing the chassis local temperature mutation sensing module 100 in the front, rear, left, and right four directions of the battery pack, the position of the explosion-proof valve in the battery pack can be better covered, and it is closer to the position of the explosion-proof valve, so as to better and more accurately collect the chassis temperature.

[0057] However, when the position of the explosion-proof valve can be determined, the number of the chassis local temperature mutation sensing modules 100 can be increased on the basis of the above four chassis local temperature mutation sensing modules 100. The installation position of the increased chassis local temperature mutation sensing module 100 is on the side of the rhombus composed of the above four chassis local temperature mutation sensing modules 100, and the installation position is related to the position of the explosion-proof valve, that is, at least one chassis local temperature mutation sensing module 100 is installed on the boundary of the rhombus. Specifically, according to the position of the explosion-proof valve, the side of the rhombus with the shortest distance to the explosion-proof valve can be determined, and the corresponding distances between each position point on this side and the explosion-proof valve can be determined, and then the above increased chassis local temperature mutation sensing module 100 is installed at the position point corresponding to the shortest distance. Of course, in addition to installing the above chassis local temperature mutation sensing module 100 at the position point corresponding to the shortest distance, the above chassis local temperature mutation sensing module 100 can also be installed at the position points corresponding to the distances within a preset range, which is not specifically limited in this specification.

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

[0059] In some embodiments of this specification, since the above-mentioned chassis local temperature mutation sensing module 100 is deployed on the deck of the vehicle cabin, the chassis local temperature mutation sensing module 100 needs to have the capabilities of resisting pressure, dust prevention, and waterproofing. Based on this, the chassis local temperature mutation sensing module 100 can be encapsulated in a housing, and the shape of the housing can be a spike shape, specifically as Figure 2 shown, Figure 2 is a schematic diagram of a packaged chassis local temperature mutation sensing module provided in this specification. The chassis local temperature mutation sensing module 100 is inside the structure shown in Figure 2 . Of course, the housing can also be any other shape, and this specification does not make specific limitations. The dust and waterproof rating of the housing is above IP67, and the IP67 is a protection rating standard. The top of the housing has a top window, that is, the area marked A in Figure 2 . A semiconductor germanium glass (that is, a special glass doped with germanium) and a sealing ring are installed on the top window. The inside of the housing uses a potting process to increase the watertight protection and compressive support. The chassis local temperature mutation sensing module 100 is encapsulated inside the housing by using the potting process, and this specification does not make specific limitations on the potting material used when using the potting process.

[0060] In some embodiments of this specification, the above-mentioned chassis local temperature mutation sensing module 100 is connected to a power supply battery, and the power supply battery and the chassis local temperature mutation sensing module 100 are encapsulated together in the above-mentioned housing. The power supply of the power supply battery is more than 1 year, and the power supply battery is replaceable, that is, the crew can replace the power supply battery of the chassis local temperature mutation sensing module 100 at any time.

[0061] In some embodiments of this specification, as Figure 3 shown, Figure 3 is a schematic diagram of a system for sensing local temperature mutation of a new energy vehicle chassis provided in this specification. Figure 3 Taking the system including 2 Internet of Things gateways 101 and 24 chassis local temperature mutation sensing modules 100 as an example for illustration, and 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 (that is, the area composed of dotted lines under each new energy vehicle in Figure 3 ) is installed with 4 chassis local temperature mutation sensing modules 100, and each chassis local temperature mutation sensing module 100 is at the midpoint of each side of the projection area. Figure 3 This is only an example, and this specification does not limit the number of Internet of Things gateways and chassis local temperature mutation sensing modules included in the system. Figure 3 The dotted line connecting the Internet of Things gateway 101 and the chassis local temperature mutation sensing module 100 in Figure 3In each of the systems shown, each Internet of Things gateway 101 is wirelessly communicatively connected to 12 chassis local temperature mutation sensing modules 100. Figure 3 In each of the systems shown, each Internet of Things gateway 101 is installed on the ceiling of the vehicle compartment and is located at approximately the center of the projection area (i.e., the communication area) directly above the 12 chassis local temperature mutation sensing modules 100 with which it communicates.

[0062] In some embodiments of the present specification, as Figure 4 shown, Figure 4 This is a flowchart of the operation of a system for sensing local temperature mutation of a new energy vehicle chassis provided in the present specification. First, an infrared sensor measures the temperature, that is, collects the real-time temperature of a local area of the new energy vehicle chassis. Then, based on the real-time temperature, the temperature rise gradient within a time interval is determined to analyze the situation of local temperature mutation of the new energy vehicle chassis, and it is judged whether the temperature rise gradient exceeds the alarm threshold. If so (i.e., Figure 4 "Y" in Figure 4 ), an alarm message is pushed, that is, an alarm message is generated and sent to the Internet of Things gateway. Then, the Internet of Things gateway receives and forwards the alarm message to the monitoring device. The monitoring device (i.e., Figure 4 the ship-end monitoring system server in

[0063] Figure 1 Figure 5 Figure 5 Figure 5

[0064] This is a schematic flowchart of a method for sensing local temperature mutation of a new energy vehicle chassis provided in the present specification. Figure 5 The method shown is applied to any one of the chassis local temperature mutation sensing modules in a system for sensing local temperature mutation of a new energy vehicle chassis. The system is deployed in the vehicle compartment of a target ship. The system includes a number of chassis local temperature mutation sensing modules and a number of Internet of Things gateways. The chassis local temperature mutation sensing modules are installed on the deck of the vehicle compartment and are located in the projection area directly below the battery pack of the new energy vehicle in the vehicle compartment. The chassis local temperature mutation sensing modules are wirelessly communicatively connected to the Internet of Things gateways. Each Internet of Things gateway is wirelessly connected to at least one chassis local temperature mutation sensing module. The method includes the following steps:

[0064] S100: Receive the pre-set alarm threshold and time interval sent by the Internet of Things gateway.

[0065] The local chassis temperature mutation sensing module can receive the preset alarm threshold and time interval sent by the IoT gateway. Among them, the IoT gateway is the IoT gateway that communicates wirelessly with the local chassis temperature mutation sensing module in the above system. The installation location of the IoT gateway is the same as that of the IoT gateway in the system shown above Figure 1 and will not be elaborated here. In addition, the installation location of the local chassis temperature mutation sensing module is also the same as that of the local chassis temperature mutation sensing module in the system shown above Figure 1 and will not be elaborated here either.

[0066] S102: Collect the real-time temperature of a local part of the new energy vehicle chassis, and determine the temperature rise gradient within the time interval according to the real-time temperature.

[0067] S104: When the temperature rise gradient reaches the preset alarm threshold, generate an alarm message and send the alarm message to the IoT gateway, so as to send the alarm message to the monitoring device of the target cabin through the IoT gateway, so that the monitoring device displays the alarm message to the crew of the target ship.

[0068] The local chassis temperature mutation sensing module can collect the real-time temperature of a local part of the new energy vehicle chassis, and determine the temperature rise gradient within the time interval according to the real-time temperature. Then, when the temperature rise gradient reaches the alarm threshold, generate an alarm message and send the alarm message to the IoT gateway, so as to send the alarm message to the monitoring device through the IoT gateway, so that the monitoring device displays the alarm message to the crew of the target ship. Among them, the real-time temperature can be the temperature collected at the current moment. The above alarm message is used to prompt the crew that the chassis temperature of the new energy vehicle is abnormal. The above temperature rise gradient represents the change rate of temperature within the time interval. The above IoT gateway can forward the received alarm message to the monitoring device through Ethernet. Of course, other communication methods can also be used to send the received alarm message to the monitoring device, which is not specifically limited in this specification. The above monitoring device can be the monitoring system server at the target ship end. The monitoring device can notify the crew that the chassis temperature of the new energy vehicle is abnormal by means of display.

[0069] When determining the temperature rise gradient within the time interval according to the real-time temperature, the local chassis temperature mutation sensing module can determine the historical temperature before the time interval. Then, according to the real-time temperature and the historical temperature, determine the temperature rise gradient within the time interval.

[0070] When determining the temperature rise gradient within the time interval according to the real-time temperature and the historical temperature, the local chassis temperature mutation sensing module can determine the temperature difference between the real-time temperature and the historical temperature, and then determine the ratio of the temperature difference to the time interval, and use it as the temperature rise gradient.

[0071] In some embodiments of this specification, the above-mentioned alarm information may include the position of the local chassis temperature mutation sensing module. Therefore, when the temperature rise gradient reaches the alarm threshold and the alarm information is generated, the local chassis temperature mutation sensing module may generate the alarm information according to the position of the local chassis temperature mutation sensing module when the temperature rise gradient reaches the alarm threshold. In addition, the above-mentioned alarm information may further include the real-time temperature. Therefore, the local chassis temperature mutation sensing module may also generate the alarm information according to the position of the local chassis temperature mutation sensing module and the real-time temperature.

[0072] In some embodiments of this specification, the local chassis temperature mutation sensing module may also send the real-time temperature to the Internet of Things gateway when the temperature rise gradient does not reach the alarm threshold.

[0073] In some embodiments of this specification, the communication protocol between the above-mentioned Internet of Things gateway and the local chassis temperature mutation sensing module may be the LoRa (Long Range) protocol or the Bluetooth protocol, and this specification does not make specific limitations.

[0074] In some embodiments of this specification, the above-mentioned local chassis temperature mutation sensing module may be Figure 1 consistent with the structure of the local chassis temperature mutation sensing module in the system shown, that is, the above-mentioned local chassis temperature mutation sensing module may include a temperature sensing sub-module, a temperature rise gradient calculation sub-module, an alarm information generation sub-module, and a data transmission sub-module, and the functions of each sub-module are the same as those of the sub-modules in the system shown in Figure 1 and will not be elaborated here.

[0075] In addition, the above-mentioned local chassis temperature mutation sensing module may be composed of an infrared sensor, an MCU single-chip microcomputer, a wireless communication chip, and an antenna welded on the circuit board. The above-mentioned temperature sensing sub-module may be composed of at least one infrared sensor and may collect the real-time temperature of the local area of the new energy vehicle chassis. The above-mentioned temperature rise gradient calculation module may, based on the MCU single-chip microcomputer, determine the temperature rise gradient within a time interval according to the real-time temperature. The above-mentioned alarm information generation sub-module may, based on the MCU single-chip microcomputer, generate alarm information when the temperature rise gradient reaches the alarm threshold. The above-mentioned data transmission sub-module may send the alarm information to the Internet of Things gateway through the wireless communication chip and the antenna. Among them, the structure of the local chassis temperature mutation sensing module and the specific uses of each structure are the same as those of the local chassis temperature mutation sensing module in the system shown in Figure 1 and will not be elaborated here.

[0076] In some embodiments of this specification, in order to better cover the position of the explosion-proof valve, the above-mentioned local chassis temperature mutation sensing modules are arranged in a diamond shape in the projection area of the battery pack of the new energy vehicle on the deck of the vehicle compartment. How to specifically determine the installation position is related to the aboveFigure 1 The determination method of the installation position in the system shown is the same, and will not be elaborated here.

[0077] In some embodiments of this specification, the above projection area is basically a regular rectangular area. However, if the above projection area is not a regular rectangular area, the circumscribed rectangular area or the minimum rectangular bounding box of the determined projection area can be used as the installation area of the chassis local temperature mutation sensing module.

[0078] In some embodiments of this specification, since the above chassis local temperature mutation sensing module is deployed on the deck of the vehicle cabin, the chassis local temperature mutation sensing module needs to have the ability to resist pressure, dust, and water. Based on this, the chassis local temperature mutation sensing module can be encapsulated in a housing, and the shape of the housing can be a spike shape, specifically as Figure 2 shown. Of course, the housing can also be any other shape, and this specification does not make specific limitations.

[0079] In some embodiments of this specification, the above chassis local temperature mutation sensing module is connected to a power supply battery, and the power supply battery and the chassis local temperature mutation sensing module are encapsulated in the above housing together. The power supply of the power supply battery lasts for more than 1 year, and the power supply battery is replaceable, that is, the crew can replace the power supply battery of the chassis local temperature mutation sensing module at any time.

[0080] The above are only the embodiments of this specification and are not used to limit this specification. For those skilled in the art, this specification can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this specification shall be included within the scope of the claims of this specification.

Claims

1. A system for sensing sudden changes in local temperature of a new energy vehicle chassis, characterized in that: The system is deployed in the vehicle cabin of the target ship, and includes a plurality of chassis local temperature mutation sensing modules and a plurality of Internet of Things gateways; the chassis local temperature mutation sensing module is installed on the deck of the vehicle cabin and is located in the projection area directly below the battery pack of the new energy vehicle in the vehicle cabin, and the chassis local temperature mutation sensing module is wirelessly connected to the Internet of Things gateway, wherein: The Internet of Things gateway is used to send the preset alarm threshold and time interval to the chassis local temperature mutation sensing module; The chassis local temperature mutation sensing module includes: a temperature sensing submodule for collecting the real-time temperature of the local chassis of the new energy vehicle, a temperature rise gradient calculation submodule for determining the temperature rise gradient at the time interval according to the real-time temperature, an alarm information generation submodule for generating alarm information when the temperature rise gradient reaches the alarm threshold, and a data transmission submodule for sending the alarm information to the Internet of Things gateway; The Internet of Things gateway, each of which is wirelessly connected to at least one chassis local temperature mutation sensing module, is used to send the received alarm information to the monitoring equipment of the target cabin, so as to display the alarm information to the crew of the target ship through the monitoring equipment.

2. The system according to claim 1, characterized in that The data transmission submodule is also used to send the real-time temperature to the Internet of Things gateway when the temperature rise gradient does not reach the alarm threshold.

3. The system according to claim 1, characterized in that The chassis local temperature mutation sensing module is composed of an infrared sensor welded on a circuit board, an MCU single chip, a wireless communication chip and an antenna; The temperature sensing submodule is composed of at least one infrared sensor, which is used to collect the real-time temperature of the local chassis of the new energy vehicle; The temperature rise gradient calculation submodule is based on the MCU single chip microcomputer and is used to determine the temperature rise gradient at the time interval according to the real-time temperature; The alarm information generation submodule is based on the MCU single chip microcomputer and is used to generate alarm information when the temperature rise gradient reaches the alarm threshold; The data transmission submodule is used to send the alarm information to the Internet of Things gateway through the wireless communication chip and the antenna.

4. The system according to claim 1, characterized in that The alarm information generation submodule is specifically configured to generate alarm information according to the position of the chassis local temperature mutation sensor module when the temperature rise gradient reaches the alarm threshold.

5. The system according to claim 1, wherein: The temperature rise gradient calculation submodule is specifically used to determine the historical temperature before the time interval; and determine the temperature rise gradient in the time interval according to the real-time temperature and the historical temperature.

6. The system according to claim 1, wherein: In the chassis local temperature mutation sensing module, the chassis local temperature mutation sensing module is installed at least in four directions of the front, back, left, and right of the projection area of ​​the battery pack, and the chassis local temperature mutation sensing module is arranged in a diamond shape.

7. The system according to claim 6, characterized in that In the chassis local temperature mutation sensing module, the chassis local temperature mutation sensing module is installed on the endpoints of the rhombus formed in the front, back, left, and right directions of the projection area of ​​the battery pack, and also includes: installing at least one chassis local temperature mutation sensing module on the boundary of the rhombus.

8. A method for sensing sudden changes in local temperature of a new energy vehicle chassis, characterized in that: The method is applied to any chassis local temperature mutation sensing module in a system for sensing local temperature mutations of a new energy vehicle chassis. The system is deployed in a vehicle cabin of a target ship. The system includes a plurality of chassis local temperature mutation sensing modules and a plurality of Internet of Things gateways. The chassis local temperature mutation sensing modules are installed on the deck of the vehicle cabin and are located in a projection area directly below a battery pack of a new energy vehicle in the vehicle cabin. The chassis local temperature mutation sensing modules are wirelessly connected to the Internet of Things gateways. Each Internet of Things gateway is wirelessly connected to at least one chassis local temperature mutation sensing module. The method includes: Receiving a preset alarm threshold and time interval sent by the Internet of Things gateway; Collecting the local real-time temperature of the chassis of the new energy vehicle, and determining the temperature rise gradient at the time interval according to the real-time temperature; When the temperature rise gradient reaches a preset alarm threshold, an alarm message is generated and sent to the Internet of Things gateway, so that the alarm message is sent to the monitoring equipment of the target ship through the Internet of Things gateway, so that the monitoring equipment displays the alarm message to the crew of the target ship.

9. The method according to claim 8, characterized in that The method further comprises: When the temperature rise gradient does not reach the alarm threshold, the real-time temperature is sent to the Internet of Things gateway.

10. The method according to claim 8, characterized in that When the temperature rise gradient reaches a preset alarm threshold, an alarm message is generated, specifically including: When the temperature rise gradient reaches the alarm threshold, an alarm message is generated according to the position of the chassis local temperature mutation sensor module.

11. The method according to claim 8, characterized in that Determining the temperature rise gradient at the time interval according to the real-time temperature specifically includes: determining the historical temperature prior to the time interval; The temperature rise gradient at the time interval is determined according to the real-time temperature and the historical temperature.

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