Remotely-controllable self-extinguishing battery pack and system

Abstract

The self-extinguishing battery pack comprises a battery pack body and a fire extinguishing system, the battery pack body is of a multi-layer structure, a sensor, a control panel and a power-off structure are arranged in the battery pack body, and the fire extinguishing system is arranged outside the battery pack body. The fire extinguishing system has a multi-trigger mechanism and a double-cooperative fire extinguishing mechanism so as to extinguish the power supply in time when the power supply burns. The battery pack is separated by adopting a multi-layer structure, and an abnormal heating layer is accurately positioned by combining temperature and smoke sensors; the layered structure isolates the fire behavior, optimizes the space and improves the energy density; a water-based and aerosol dual fire extinguishing mechanism is adopted, aerosol is firstly released to inhibit reaction, and then the water-based is cooled to cope with thermal runaway cooperatively; the hot melting ball automatically switches pressure, and external energy is not needed; three trigger mechanisms are integrated to form a protection system, so that the emergency capability is enhanced, and the reliability at extreme high temperature is ensured; the circuit is automatically cut off to prevent diffusion when abnormity occurs; the separated design avoids interference, and the metal spring realizes power-off protection; the monitoring fault tolerance is improved through multiple sensors, and the fire extinguishing time sequence is guaranteed through pressure difference.

Description

Technical Field

[0001] The present invention relates to the field of new energy batteries, and particularly to a remotely controllable self-extinguishing battery pack and system. Background Art

[0002] With the rise of new energy, batteries, as the core of new energy, have been widely used in transportation, energy storage, mobile devices and other fields.

[0003] However, the risks of new energy batteries cannot be ignored. They are prone to spontaneous combustion in hot summers or other extreme situations. In addition to improving the battery raw materials, some manufacturers have set up automatic fire extinguishing devices for new energy batteries and achieved fire extinguishing of the batteries through a remote control trigger mechanism or a high-temperature self-trigger mechanism to avoid danger.

[0004] However, whether it is gas fire extinguishing or water-based fire extinguishing methods, they both require a trigger device to achieve fire extinguishing. In the prior art, solenoid valves are generally used for control, but solenoid valve control has a fatal defect, that is, it needs to rely on battery power supply and it is a single-trigger mechanism. When the battery catches fire and cannot supply power, the fire extinguishing cannot be triggered, which will cause the fire extinguishing structure to fail. Summary of the Invention

[0005] Based on the deficiency that the triggering of the self-extinguishing device of new energy batteries in the prior art depends on solenoid valves and is prone to power failure and failure to be triggered, resulting in fire extinguishing failure, the present invention provides a remotely controllable self-extinguishing battery pack and system.

[0006] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0007] A remotely controllable self-extinguishing battery pack and system, including a battery pack body and a fire extinguishing system,

[0008] The battery pack body includes:

[0009] A housing having a multi-layer accommodation cavity with upper and lower layers;

[0010] A battery pack, which is arranged in each accommodation cavity in layers and is electrically connected between layers;

[0011] A control board, which is arranged in the accommodation cavity at the top layer, is electrically connected to the battery pack for charging and discharging the battery, and has a remote communication module;

[0012] A sensor, which is arranged in each accommodation cavity for detecting the temperature and smoke in each accommodation cavity;

[0013] The fire extinguishing system includes:

[0014] A coated outer shell, with a slot in the middle part, into which the battery pack body is inserted. Inside it, there are an insulation cavity, a water-based fire extinguishing cavity and an aerosol fire extinguishing cavity from the inside to the outside. There is a horizontal channel at the top of the aerosol fire extinguishing cavity, and a vertical channel at the top of the water-based fire extinguishing cavity. The vertical channel is connected to the internal space of the housing through a pipeline. The horizontal channel extends to the top of the water-based fire extinguishing cavity and intersects perpendicularly with the vertical channel. The intersection is a spherical space, and there is a heat-melt spherical ball in the spherical space. There is a fire extinguishing channel extending outside the coated outer shell at the top of the spherical space. The heat-melt spherical ball blocks the vertical channel, the horizontal channel and the fire extinguishing channel.

[0015] Fire extinguishing materials, which include water-based fire extinguishing agents arranged in the water-based fire extinguishing cavity and aerosols arranged in the aerosol fire extinguishing cavity.

[0016] A fire extinguishing trigger device, which includes an ignition device arranged at the horizontal channel and the bottom of the aerosol fire extinguishing cavity, a thermal-sensitive wire and a control wire connected to the ignition device. The end of the thermal-sensitive wire is abutted against the housing for passive high-temperature triggering, and the control wire is connected to the control board for active control triggering.

[0017] Preferably, there is a partition with through holes in the housing, and the internal space of the housing is divided into several accommodation cavities by the partition. The battery pack in the bottom accommodation cavity is in vertical sliding fit with the accommodation cavity where it is located, and there is a metal spring at the bottom of the bottom accommodation cavity that contacts the negative electrode of the battery pack. There is an electric auxiliary lifting structure in the middle of the metal spring, and the auxiliary lifting structure and the metal spring jointly apply a vertically upward lifting force to lift the bottom battery pack to be electrically connected to the battery pack above it.

[0018] Preferably, the auxiliary lifting device includes a magnet and an electromagnetic device. The magnet and the electromagnetic device are respectively arranged on the bottom surface of the bottom battery pack and the bottom of the bottom accommodation cavity. The electromagnetic device is electrically connected to the control board. When the control board supplies power to the electromagnetic device, a repulsive force is generated between the electromagnetic device and the magnet, and together with the elastic force of the metal spring, the bottom battery pack is lifted so that the positive electrode of the bottom battery pack contacts the negative electrode of the battery pack above it for electrical connection. When the control board stops supplying power, the bottom battery pack compresses the metal spring under the action of gravity, thereby disconnecting the connection with the battery pack above it.

[0019] Preferably, the circuit board has a power supply module and a control module. The power supply module supplies power externally through each series-connected battery pack, and the control module is supplied power separately or in parallel through each battery pack.

[0020] Preferably, the control module is connected to each sensor and the execution unit, and it sends the detection data to the remote control terminal through the communication module.

[0021] Preferably, the remote control terminal is one of a mobile phone, a tablet computer and a computer.

[0022] Preferably, the hot-melt spherical ball is a fusible glass ball plug or a fusible alloy ball plug.

[0023] Preferably, the sensor includes a temperature sensor and a smoke sensor. The temperature sensor is disposed in each layer accommodating cavity, and the smoke sensor is disposed in the accommodating cavity of the top layer.

[0024] Preferably, the vertical channel extends downward to the water-based fire extinguishing cavity. The working pressure during aerosol fire extinguishing is 2-5 times that of the water-based fire extinguishing agent. When the hot-melt spherical ball is heated and melted, it slides down from the vertical channel, and blocks the vertical channel during the initial sliding process, so as to form a time difference between aerosol fire extinguishing and water-based fire extinguishing.

[0025] Preferably, the diameter of the spherical space is the same as that of the hot-melt spherical ball, and the diameter of the hot-melt spherical ball is slightly larger than the diameters of the vertical channel, the horizontal channel and the fire extinguishing channel.

[0026] Compared with the prior art, the advantages of the present invention are as follows: This application uses a multi-layer structure to separate the battery pack, combines temperature and smoke sensors to accurately locate the abnormally heated layer; the layered structure isolates the fire, optimizes the space and improves the energy density; adopts a dual fire extinguishing mechanism of water-based and aerosol. The aerosol is released first to inhibit the reaction, and the water-based agent is used to cool down subsequently, to jointly cope with thermal runaway; the hot-melt spherical ball automatically switches the pressure without external energy; integrates three triggering mechanisms to form a protection system, enhances the emergency response ability, and ensures reliability under extremely high temperatures; automatically cuts off the circuit to prevent diffusion during abnormality; the separated design avoids interference, and the metal spring realizes power-off protection; multiple sensors improve the monitoring fault tolerance, and the pressure difference ensures the fire extinguishing sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be construed as limiting the scope of the present invention. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0028] Figure 1 is a perspective view of the present application;

[0029] Figure 2 is a top view of the present application;

[0030] Figure 3 and Figure 4 is an exploded view of the present application;

[0031] Figure 5 is Figure 2 the sectional view taken along line A-A in

[0032] Figure 6 isFigure 5 Enlarged view at Q in the figure;

[0033] Figure 7 is Figure 5 Enlarged view at H in the figure;

[0034] In the figure: 10, battery pack body; 101, housing; 102, battery pack; 103, temperature sensor; 104, magnet; 105, smoke sensor; 106, control board; 107, metal spring; 108, electromagnetic device; 20, covering shell; 201, heat insulation cavity; 202, water-based fire extinguishing cavity; 203, aerosol fire extinguishing cavity; 30, ignition device.

[0035] Specific implementation

[0036] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary, and should not be construed as limiting the scope of protection of the present invention. Embodiment

[0037] A remotely controllable self-extinguishing battery pack and system, as Figures 1 - 7 shown, comprising a battery pack body 10 and a fire extinguishing system,

[0038] The battery pack body 10 includes:

[0039] A housing 101 having a multi-layer accommodation cavity with upper and lower layers;

[0040] A battery pack 102, which is arranged in layers in each accommodation cavity and is electrically connected between layers. By separating the battery pack 102 through the multi-layer accommodation cavity and combining the temperature sensor 103 and the smoke sensor 105, accurate fire location can be achieved. This structural design not only optimizes the space utilization rate but also effectively inhibits the spread of fire across layers through physical isolation; A control board 106, which is arranged in the accommodation cavity at the top layer, is electrically connected to the battery pack 102 for charging and discharging the battery, and has a remote communication module. The control board 106 is used for overall monitoring through remote transmission of sensor data. In addition, the trigger threshold can be remotely set, such as the adjustment of the trigger temperature, or the fire extinguishing can be remotely triggered actively; Sensors, which are arranged in each accommodation cavity for detecting the temperature and smoke in each accommodation cavity. The sensors include a temperature sensor 103 and a smoke sensor 105 for detecting the state of the battery pack 102, and transmit the data to the control board 106 or a remote control terminal to control whether to extinguish the fire;

[0041] The fire extinguishing system includes:

[0042] A coated outer shell 20, with a slot in the middle, into which the battery pack body 10 is inserted. Inside it, there are an insulation chamber 201, a water-based fire extinguishing chamber 202, and an aerosol fire extinguishing chamber 203 from the inside to the outside. There is a horizontal channel at the top of the aerosol fire extinguishing chamber 203. There is a vertical channel at the top of the water-based fire extinguishing chamber 202, and the vertical channel is connected to the internal space of the housing 101 through a pipeline. The horizontal channel extends to the top of the water-based fire extinguishing chamber 202 and intersects the vertical channel perpendicularly. The intersection is a spherical space, and a heat-melting spherical ball 01 is arranged in the spherical space. There is a fire extinguishing channel extending outside the coated outer shell 20 at the top of the spherical space. The heat-melting spherical ball 01 blocks the vertical channel, the horizontal channel, and the fire extinguishing channel.

[0043] Fire extinguishing materials, which include a water-based fire extinguishing agent arranged in the water-based fire extinguishing chamber 202 and an aerosol arranged in the aerosol fire extinguishing chamber 203. The nested layout of the water-based fire extinguishing agent for rapid temperature reduction and the aerosol for inhibiting chemical reactions takes into account initial fire extinguishing and in-depth inhibition, and solves the problem that a single fire extinguishing agent cannot cope with all stages of battery thermal runaway.

[0044] A fire extinguishing trigger device, which includes an ignition device 30 arranged at the horizontal channel and the bottom of the aerosol fire extinguishing chamber 203, a thermal sensitive wire and a control wire connected to the ignition device 30. The end of the thermal sensitive wire is attached to the housing 101 for passive high-temperature triggering, and the control wire is connected to the control board 106 for active control triggering. Through the heat-melting plugging design of the spherical space, the fire extinguishing agent is automatically released at high temperature without external energy and has high reliability. Among them, when the fire extinguishing is triggered, the ignition device 30 ignites. The high temperature generated after the ignition device 30 at the top ignites melts the surface of the heat-melting spherical ball 01, and the horizontal channel and the fire extinguishing channel are connected. A large amount of gas generated by the aerosol enters the fire extinguishing channel and then enters the housing 101 for fire extinguishing. At the same time, since the gas pressure generated by the aerosol is greater than the pressure in the water-based fire extinguishing chamber 202, this part of the gas will push the incompletely melted heat-melting spherical ball 01 into the vertical channel and drop into the water-based fire extinguishing chamber 202. During this period, the aerosol generates a fire extinguishing effect with the generated gas. When its gas pressure decreases or the melting degree of the heat-melting spherical ball 01 increases, the water-based fire extinguishing agent enters the housing 101 from the fire extinguishing channel for fire extinguishing. The dual fire extinguishing synergistic effect is used to achieve the maximum fire extinguishing effect. In addition, when triggered, there are three triggering mechanisms: the first is that when the value detected by the sensor exceeds the threshold, the control board 106 controls the ignition device 30 to ignite; the second is that the value is detected by the sensor, transmitted to the remote control terminal through the remote communication module, and the ignition device 30 is automatically controlled or manually operated to ignite by the remote control terminal; the third is that when the temperature rises, the thermal sensitive wire detects the high temperature, and then triggers the ignition device 30 to ignite. The ignition device 30 is an ignition device that generates an electric arc.

[0045] Preferably, a partition board with a through hole is provided inside the housing 101, and the internal space of the housing 101 is divided into several accommodation cavities by the partition board. Among them, the battery pack 102 in the bottom accommodation cavity is vertically slidably matched with the accommodation cavity where it is located, and a metal spring 107 in contact with the negative electrode of the battery pack 102 is provided at the bottom of the bottom accommodation cavity. An electric auxiliary lifting structure is provided in the middle of the metal spring 107, and the auxiliary lifting structure and the metal spring 107 jointly apply an upward vertical lifting force to lift the bottom battery pack 102 to be electrically connected to the battery pack 102 above it. In this solution, the through hole is used for the contact and electrical connection of the upper and lower battery packs 102, and the partition board is used to isolate the upper and lower battery packs 102 to reduce the mutual influence. In addition, the metal spring 107 is connected to the control board 106 through a power cord. Since the bottom battery pack 102 has a vertical sliding space, when the lifting force disappears, it drops under the action of gravity, thereby disconnecting the connection between the multiple battery packs 102 to achieve power-off.

[0046] Preferably, the auxiliary lifting device includes a magnet 104 and an electromagnetic device 108. The magnet 104 and the electromagnetic device 108 are respectively arranged on the bottom surface of the bottom battery pack 102 and the bottom of the bottom accommodation cavity. The electromagnetic device 108 is electrically connected to the control board 106. When the control board 106 supplies power to the electromagnetic device 108, a repulsive force is generated between the electromagnetic device 108 and the magnet 104, and the repulsive force cooperates with the elastic force of the metal spring 107 to lift the bottom battery pack 102 so that the positive electrode of the bottom battery pack 102 contacts the negative electrode of the battery pack 102 above it for electrical connection. When the control board 106 stops supplying power, the bottom battery pack 102 compresses the metal spring 107 under the action of gravity, thereby disconnecting the connection with the battery pack 102 above it. This solution is a specific solution for the auxiliary lifting device. By the cooperation of the electromagnetic device 108 and the magnet 104, power-off can be achieved, that is, the circuit is broken. Compared with setting a circuit breaker, which only breaks the circuit when the temperature is abnormal or smoke appears, it reduces the influence of temporary voltage and current abnormalities on the system, and has stronger pertinence.

[0047] Preferably, the control board 106 has a power supply module and a control module. The power supply module supplies power externally through each series-connected battery pack 102, and the control module is supplied with power separately or in parallel through each battery pack 102. In this solution, the two sets of modules are separated. The power supply module is used for charging and discharging, while the control module is used for monitoring and controlling the fire extinguishing trigger. This can avoid the mutual influence of the two sets of modules and is beneficial to better operation.

[0048] Preferably, the control module is connected to each sensor and the execution unit, and it sends the detection data to the remote control terminal through the communication module.

[0049] Preferably, the remote control terminal is one of a mobile phone, a tablet computer, and a computer.

[0050] Preferably, the hot-melt spherical ball 01 is a fusible glass ball plug or a fusible alloy ball plug. The fusible glass ball plug or the fusible alloy ball plug will melt at 120-140 degrees Celsius.

[0051] Preferably, the sensor includes a temperature sensor 103 and a smoke sensor 105. The temperature sensor 103 is disposed in each layer accommodating cavity, and the smoke sensor 105 is disposed in the accommodating cavity of the top layer. A plurality of temperature sensors 103 are used to detect the temperature of each layer to quickly feedback when local combustion occurs. Since smoke will flow upward, only one smoke sensor 105 needs to be provided at the top. The cooperation of multiple sensors can avoid the failure of a single sensor.

[0052] Preferably, the vertical channel extends downward into the water-based fire extinguishing cavity 202. The working pressure of the aerosol fire extinguishing is 2-5 times that of the water-based fire extinguishing agent. When the hot-melt spherical ball 01 is heated and melted, it slides down from the vertical channel, and blocks the vertical channel during the initial sliding, so that there is a time difference between the aerosol fire extinguishing and the water-based fire extinguishing. By setting the pressure difference, a time difference in the action time of the two fire extinguishing mechanisms can be achieved, so as to achieve a perfect synergistic effect.

[0053] Preferably, the diameter of the spherical space is the same as that of the hot-melt spherical ball 01, and the diameter of the hot-melt spherical ball 01 is slightly larger than the diameters of the vertical channel, the horizontal channel and the fire extinguishing channel.

[0054] The above introduces the remotely controllable self-extinguishing battery pack and system provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the present invention and its core idea. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A remotely controllable self-extinguishing battery pack and system, comprising a battery pack body and a fire extinguishing system, characterized in that: The battery pack includes: A housing having a multi-layered accommodating cavity; The battery pack is layered in each accommodating cavity and each layer is electrically connected; A control board is disposed in the receiving cavity of the top layer, is electrically connected to the battery pack for charging and discharging the battery, and has a remote communication module; A sensor is disposed in each accommodating cavity and is used to detect the temperature and smoke of each accommodating cavity; The fire extinguishing system includes: A covering shell, wherein the middle part of the covering shell has a slot, the battery pack body is inserted into the slot, and the inside of the covering shell has a heat insulation cavity, a water-based fire extinguishing cavity and an aerosol fire extinguishing cavity from the inside to the outside, a horizontal channel is provided at the top of the aerosol fire extinguishing cavity, a vertical channel is provided at the top of the water-based fire extinguishing cavity, and the vertical channel is connected with the inner space of the shell through a pipeline, the horizontal channel extends to the top of the water-based fire extinguishing cavity and intersects with the vertical channel vertically, the intersection is a spherical space, and a hot-melt sphere is provided in the spherical space, and a fire extinguishing channel extending to the outside of the covering shell is provided at the top of the spherical space, and the hot-melt sphere blocks the vertical channel, the horizontal channel and the fire extinguishing channel; Fire extinguishing materials, including a water-based fire extinguishing agent disposed in the water-based fire extinguishing chamber and an aerosol disposed in the aerosol fire extinguishing chamber; The fire extinguishing trigger device includes an ignition device arranged at the bottom of the aerosol fire extinguishing chamber at the horizontal channel and a thermistor and a control line connected to the ignition device. The end of the thermistor is attached to the shell for passive high-temperature triggering, and the control line is connected to the control board for active control triggering.

2. The remotely controllable self-extinguishing battery pack and system according to claim 1, characterized in that: A partition with a through hole is provided in the shell and the internal space of the shell is divided into a number of accommodating chambers by the partition, wherein the battery pack in the bottom accommodating chamber is vertically slidably matched with the accommodating chamber in which it is located, and a metal spring in contact with the negative pole of the battery pack is provided at the bottom of the bottom accommodating chamber, an electric auxiliary lifting structure is provided in the middle of the metal spring, and the auxiliary lifting structure and the metal spring jointly apply a vertical upward lifting force to lift the battery pack at the bottom so as to electrically connect it with the battery pack above it.

3. The remotely controllable self-extinguishing battery pack and system according to claim 2, characterized in that: The auxiliary lifting device includes a magnet and an electromagnetic device, which are respectively arranged on the bottom surface of the battery pack and the bottom bottom of the accommodating cavity. The electromagnetic device is electrically connected to the control board. When the control board supplies power to the electromagnetic device, a repulsive force is generated between the electromagnetic device and the magnet, and the elastic force of the metal spring is cooperated to lift the battery pack at the bottom so that the positive pole of the battery pack at the bottom contacts the negative pole of the battery pack above it and is electrically connected. When the control board stops supplying power, the battery pack at the bottom compresses the metal spring under the action of gravity, thereby disconnecting from the battery pack above it.

4. The remotely controllable self-extinguishing battery pack and system according to claim 1, characterized in that: The circuit board has a power supply module and a control module. The power supply module supplies power to the outside through the battery groups connected in series, and the control module supplies power individually or in parallel through the battery groups.

5. The remotely controllable self-extinguishing battery pack and system according to claim 4, characterized in that: The control module is connected with each sensor and the execution unit, and sends the detection data to the remote control terminal through the communication module.

6. The remotely controllable self-extinguishing battery pack and system according to claim 5, characterized in that: The remote control terminal is one of a mobile phone, a tablet computer, and a computer.

7. The remotely controllable self-extinguishing battery pack and system according to claim 1, characterized in that: The hot-melt ball is a fusible glass ball plug or a fusible alloy ball plug.

8. The remotely controllable self-extinguishing battery pack and system according to claim 1, characterized in that: The sensors include temperature sensors and smoke sensors. The temperature sensors are arranged in the accommodating cavities of each layer, and the smoke sensors are arranged in the accommodating cavity of the top layer.

9. The remotely controllable self-extinguishing battery pack and system according to claim 1, characterized in that: The vertical channel extends downward into the water-based fire extinguishing chamber. The working pressure during aerosol fire extinguishing is 2-5 times that of the water-based fire extinguishing agent. The hot-melt ball slides down the vertical channel when it melts due to heat, and blocks the vertical channel during the early stage of sliding, creating a time difference between aerosol fire extinguishing and water-based fire extinguishing.

10. The remotely controllable self-extinguishing battery pack and system according to claim 1, characterized in that: The diameter of the spherical space is the same as the diameter of the hot-melt sphere, and the diameter of the hot-melt sphere is slightly larger than the diameters of the vertical channel, the horizontal channel and the fire-extinguishing channel.

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