Energy storage device

Abstract

The utility model provides energy storage equipment which comprises a shell, a battery module and a first fire extinguishing device, a battery cabin is formed in the shell, heat exchange liquid is contained in the battery cabin, the battery module is installed in the battery cabin, the battery module is immersed in the heat exchange liquid, and the first fire extinguishing device is arranged in the battery cabin. And the first fire extinguishing device is mounted in the battery cabin and is positioned above the liquid level of the heat exchange liquid, so that when a fire disaster occurs due to thermal runaway of the battery module, the first fire extinguishing device can be quickly started and release a fire extinguishing agent to directly act on a fire source, and fire spreading is effectively restrained in time.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to energy storage equipment. Background Art

[0002] Immersion liquid cooling thermal management technology significantly improves the safety of submerged energy storage systems by suppressing thermal runaway and heat spread within the battery modules. However, while submerged energy storage systems are operating, fires in the battery compartment remain a possibility. If a fire occurs in the electrical compartment, the heat exchange fluid in the compartment cannot promptly extinguish the fire, causing it to spread. Utility Model Content

[0003] The embodiment of the present utility model provides an energy storage device, which can promptly extinguish a fire in a battery compartment to prevent the fire from spreading.

[0004] In a first aspect, an embodiment of the present invention provides an energy storage device.

[0005] In one embodiment, the housing is formed with a battery compartment, wherein the battery compartment is used to contain a heat exchange fluid;

[0006] a battery module, mounted in the battery compartment, the battery module being immersed in the heat exchange fluid;

[0007] A first fire extinguishing device is installed in the battery compartment and is above the liquid level of the heat exchange fluid.

[0008] In one embodiment, the distance between the first fire extinguishing device and the liquid level of the heat exchange fluid is L1, wherein L1>200 mm.

[0009] In one embodiment, the first fire extinguishing device comprises at least one of a thermal aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device.

[0010] In one embodiment, the first fire extinguishing device is wall-mounted on the bulkhead of the battery compartment.

[0011] In one embodiment, the energy storage device further includes a first detector installed in the battery compartment, for detecting at least one of a temperature, a smoke concentration, and a combustible gas concentration in the battery compartment;

[0012] The first detector is connected to the first fire extinguishing device, and the first fire extinguishing device is used to extinguish the fire according to at least one of the temperature, the smoke concentration and the combustible gas.

[0013] In one embodiment, the first detector is located above the battery module, and the distance between the first detector and the top of the battery module is H1, where H1 is ≥ 150 mm.

[0014] In an embodiment, the shell is further formed with an electrical cabin, the electrical cabin and the battery cabin are arranged at intervals;

[0015] The energy storage device further comprises an electrical unit and a second fire extinguishing device, the electrical unit and the second fire extinguishing device are both installed in the electrical cabin.

[0016] In an embodiment, the second fire extinguishing device is above the electrical unit.

[0017] In an embodiment, the distance between the second fire extinguishing device and the electrical unit is L2, wherein L2>200mm.

[0018] In an embodiment, the second fire extinguishing device comprises at least one of a thermal aerosol fire extinguishing device and a perfluorohexone fire extinguishing device.

[0019] In an embodiment, the first fire extinguishing device is arranged adjacent to the electrical cabin and is electrically connected with a controller installed in the electrical cabin.

[0020] In an embodiment, a power supply module is further included, the power supply module is installed in the electrical cabin, and the power supply module is used to supply power for the controller.

[0021] In an embodiment, the energy storage device further comprises a second detector, the second detector is installed in the electrical cabin and above the electrical unit, and the second detector is used to detect the temperature or smoke concentration in the electrical cabin.

[0022] The second detector is connected with the second fire extinguishing device, and the second fire extinguishing device is used to extinguish fire according to the temperature or smoke concentration.

[0023] The embodiment of the utility model has the advantages of:

[0024] In an embodiment of the present invention, by immersing the battery module in a heat exchange fluid, this design greatly enhances the heat dissipation capacity of the battery module. As a heat transfer medium, the heat exchange fluid can quickly absorb the heat generated during the operation of the battery module, thereby effectively preventing the battery module from overheating, extending the life of the battery module, and improving the stability of the energy storage device. The heat exchange fluid not only plays a role in heat dissipation, but also acts as a physical barrier to a certain extent, isolating the battery module from direct contact with the outside world, reducing battery module safety accidents caused by changes in the external environment (such as impact, short circuit, etc.). A first fire extinguishing device is installed in the battery compartment and is positioned above the liquid level of the heat exchange fluid. In this way, when a fire occurs due to thermal runaway of the battery module, the first fire extinguishing device can be quickly activated to release the fire extinguishing agent, directly acting on the fire source, and promptly and effectively curbing the spread of the fire. In addition, integrating the first fire extinguishing device and the battery module in the same battery compartment makes the structure of the energy storage device compact, which improves space utilization on the one hand and facilitates the installation and transportation of the energy storage device on the other. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the energy storage device provided by an embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of the battery module shown is immersed in the heat exchange fluid;

[0028] Figure 3 yes Figure 1 A schematic cross-sectional view of the energy storage device shown;

[0029] Figure 4 yes Figure 3 A partial enlarged schematic diagram in the middle;

[0030] Figure 5 yes Figure 1 A schematic top view of the energy storage device.

[0031] Description of reference numerals:

[0032] 10. Energy storage equipment;

[0033] 1. Housing, 11. Battery compartment, 12. Electrical compartment, 2. Battery module, 3. First fire extinguishing device, 4. First detector, 5. Electrical unit, 6. Second fire extinguishing device, 7. Power module, 8. Second detector, 9. Sound and light alarm, 101. Balancing valve, 102. Explosion vent panel;

[0034] 20. Heat exchange fluid;

[0035] 30. Controller. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0037] Immersion liquid cooling thermal management technology significantly improves the safety of submerged energy storage systems by suppressing thermal runaway and heat spread within the battery modules. However, while submerged energy storage systems are operating, fires in the battery compartment remain a possibility. If a fire occurs in the electrical compartment, the heat exchange fluid in the compartment cannot promptly extinguish the fire, causing it to spread.

[0038] In view of this, the present invention proposes an energy storage device. Figures 1 to 5 This is a schematic diagram of the structure of an embodiment of the energy storage device provided by the present invention. The energy storage device provided by the present invention can promptly extinguish a fire in a battery compartment to prevent the fire from spreading. The energy storage device will be described in detail below in conjunction with the main figures.

[0039] Reference Figures 1 to 3 The energy storage device 10 comprises a shell 1, a battery module 2 and a first fire extinguishing device 3. The shell 1 is formed with a battery compartment 11, which is used to hold a heat exchange fluid 20. The battery module 2 is installed in the battery compartment 11. The battery module 2 is immersed in the heat exchange fluid 20. The first fire extinguishing device 3 is installed in the battery compartment 11 and is above the liquid level of the heat exchange fluid 20.

[0040] In an embodiment of the present invention, by immersing the battery module 2 in the heat exchange fluid 20, this design greatly enhances the heat dissipation capacity of the battery module 2. As a heat conduction medium, the heat exchange fluid 20 can quickly absorb the heat generated during the operation of the battery module 2, thereby effectively preventing the battery module 2 from overheating, extending the life of the battery module 2, and improving the stability of the energy storage device 10. The heat exchange fluid 20 not only plays a role in heat dissipation, but also acts as a physical barrier to a certain extent, isolating the battery module 2 from direct contact with the outside world, reducing safety accidents of the battery module 2 caused by changes in the external environment (such as impact, short circuit, etc.). The first fire extinguishing device 3 is installed in the battery compartment 11 and is positioned above the liquid level of the heat exchange fluid 20. In this way, when the battery module 2 thermal runaway causes a fire, the first fire extinguishing device 3 can be quickly activated to release the fire extinguishing agent, directly acting on the fire source, and timely and effectively curbing the spread of the fire. In addition, the first fire extinguishing device 3 and the battery module 2 are integrated into the same battery compartment 11 , so that the structure of the energy storage device 10 is compact, which improves space utilization on the one hand and facilitates installation and transportation of the energy storage device 10 on the other.

[0041] It should be noted that the heat exchange fluid 20 is often various types of synthetic oils, mineral oils, fluorinated liquids, etc. In order to improve safety, in one embodiment, the heat exchange fluid 20 is flame retardant while achieving heat exchange, so that the safety of the energy storage device 10 can be further improved. The heat exchange fluid 20 may include a flame retardant heat transfer oil, a silicone-based heat exchange fluid 20, or a fluorocarbon heat exchange fluid 20. Specifically, the flame retardant heat transfer oil may include an alkylbenzene-type (benzene ring-type) flame retardant heat transfer oil, an alkylnaphthalene-type flame retardant heat transfer oil, or an alkylbiphenyl-type flame retardant heat transfer oil. Specifically, the specific type of the heat exchange fluid 20 can be selected as needed, and this application does not limit this.

[0042] Reference Figure 2 and Figure 3In one embodiment, the distance between the first fire extinguishing device 3 and the liquid level of the heat exchange fluid 20 is L1, where L1 > 200 mm. Installing the first fire extinguishing device 3 at a distance greater than 200 mm from the liquid level of the heat exchange fluid 20 ensures that the fire extinguishing agent can be directly and effectively sprayed onto the fire source or potential fire source area during fire extinguishing without being blocked or interfered with by the liquid level of the heat exchange fluid 20. This allows the fire extinguishing agent to fully exert its fire extinguishing effectiveness, quickly controlling and extinguishing the fire. During the fire extinguishing process, if the first fire extinguishing device 3 is too close to the liquid level of the heat exchange fluid 20, the impact force generated by the spraying may increase the risk of fire spread. Setting the distance to L1 > 200 mm can reduce this risk to a certain extent, improving the safety of the entire energy storage device 10. Ensuring a distance between the first fire extinguishing device 3 and the liquid level of the heat exchange fluid 20 greater than 200 mm also facilitates subsequent maintenance and inspection of the first fire extinguishing device 3. For example, when replacing the fire extinguishing agent, checking the performance of the first fire extinguishing device 3 or performing other maintenance work, the staff can more easily approach and operate the first fire extinguishing device 3 without worrying about direct contact with the heat exchange fluid 20 .

[0043] It should be noted that the distance between the first fire extinguishing device 3 and the liquid level of the heat exchange fluid 20 can be 201 mm, 205 mm, 210 mm, 218 mm or 220 mm, etc. Specifically, the distance between the first fire extinguishing device 3 and the liquid level of the heat exchange fluid 20 can be selected as needed, and this application does not limit this.

[0044] In one embodiment, the first fire extinguishing device 3 includes at least one of a hot aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device. The hot aerosol fire extinguishing device uses a highly efficient aerosol fire extinguishing agent, which can instantly form a large-scale, high-concentration fire extinguishing agent cloud, rapidly reducing the fire scene temperature and suppressing the combustion reaction. The hot aerosol fire extinguisher does not require a water source or an external power source, allowing for quick and flexible fire extinguishing operations, thereby effectively controlling the fire within the battery compartment 11. The hot aerosol fire extinguisher does not produce harmful gases or corrosive substances during the fire extinguishing process, and does not harm personnel or the energy storage device 10. Furthermore, the hot aerosol fire extinguishing device can automatically trigger fire extinguishing, avoiding accidents caused by improper operation. Furthermore, the hot aerosol fire extinguisher has a short spraying time, typically completing the fire extinguishing process within seconds, reducing the risk of fire spread. The extinguishing agent in the hot aerosol fire extinguisher does not contain water, so it does not form a conductive and corrosive electrolyte film, thereby avoiding damage to the battery module 2. The structure of the hot aerosol fire extinguishing device is relatively simple, easy to maintain, has a long service life, and is relatively low in cost. When the hot aerosol fire extinguishing device is selected for fire extinguishing, production costs can be reduced.

[0045] In addition, the fire extinguishing agent used in the perfluorohexanone fire extinguishing device is halogen-free, residue-free, and environmentally friendly. No harmful substances will be released during the fire extinguishing process, and no pollution will be caused to the atmosphere, water bodies, soil and other environments. At the same time, it will not damage the ozone layer and is harmless to the human body. At the same time. Perfluorohexanone fire extinguishing agent has multiple fire extinguishing mechanisms such as rapid gasification, heat absorption and cooling, and suppression of combustion chain reactions. It can quickly extinguish fires in a short time and reduce fire losses. Perfluorohexanone fire extinguishing agent has extremely low toxicity to the human body, is non-corrosive, and does not damage the battery module 2. At the same time, its good electrical insulation allows fire extinguishing operations to be performed under power, reducing the risk of electric shock accidents.

[0046] It should be noted that, in one embodiment, the first fire extinguishing device 3 includes one of a hot aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device. In other embodiments, the first fire extinguishing device 3 may include both a hot aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device. In this way, the fire extinguishing effect is best.

[0047] Reference Figure 2 and Figure 3 In one embodiment, the first fire extinguishing device 3 is wall-mounted on the bulkhead of the battery compartment 11. This ensures a relatively fixed and conspicuous installation location for the first fire extinguishing device 3, facilitating routine inspection and maintenance and ensuring the device is always in good working condition. When replacing the fire extinguishing agent or performing other maintenance, the wall-mounted design simplifies and expedites operation, reducing maintenance costs and time. Furthermore, this wall-mounted installation fully utilizes the vertical space of the battery compartment 11, securing the fire extinguishing device to the bulkhead without occupying the installation space of the battery module 2.

[0048] Continue to refer to Figure 2 and Figure 3In one embodiment, the energy storage device 10 further includes a first detector 4 installed within the battery compartment 11 for detecting at least one of the following: temperature, smoke concentration, and combustible gas concentration within the battery compartment 11. The first detector 4 is connected to a first fire extinguishing device 3, which is configured to extinguish fires based on at least one of the following: temperature, smoke concentration, and combustible gas concentration. Thus, the first detector 4 can monitor at least one of the following parameters within the battery compartment 11 in real time. This real-time monitoring mechanism enables the energy storage device 10 to detect abnormal signals in the early stages of a fire, significantly accelerating fire detection. By monitoring at least one of the following: temperature, smoke concentration, and combustible gas concentration, the energy storage device 10 can identify potential fire risks before a fire actually occurs. This helps maintenance personnel take timely measures to eliminate fire hazards and prevent fires from occurring. When the first detector 4 detects that at least one of the following: temperature, smoke concentration, and combustible gas concentration within the battery compartment 11 exceeds a preset safety threshold, the first fire extinguishing device 3 is automatically triggered. This automatic triggering mechanism enables the first fire extinguishing device 3 to activate in the shortest possible time, effectively curbing the spread of fire. The combined use of the first detector 4 and the first fire extinguishing device 3 provides multi-level fire protection for the energy storage device 10. Through real-time monitoring, early warning, and rapid response, the system can maintain a high level of vigilance and response capabilities at all stages of a fire.

[0049] It should be noted that the first detector 4 and the first fire extinguishing device 3 can be directly connected. This allows the first fire extinguishing device 3 to directly receive signals such as temperature or smoke concentration detected by the first detector 4. The first fire extinguishing device 3 then performs fire extinguishing operations based on at least one of the temperature, smoke concentration, and combustible gas concentration signals. This direct connection eliminates intermediaries, allowing the first detection signal to be transmitted to the first fire extinguishing device 3 with virtually no delay. This ensures that the first fire extinguishing device 3 receives fire information immediately and responds immediately. Due to the efficient signal transmission, the first fire extinguishing device 3 can be activated more quickly and effective fire extinguishing measures can be implemented at the earliest possible stage. This helps to quickly control the fire, prevent its spread and expansion, and thus reduce losses. The direct connection allows the first fire extinguishing device 3 to directly receive the original signal from the first detector 4, avoiding signal attenuation and distortion during transmission. This helps the first fire extinguishing device 3 more accurately assess the fire situation and adopt appropriate fire extinguishing strategies based on the actual situation. The direct connection simplifies the structure of the energy storage device 10 and reduces the number of intermediate devices and connecting cables. This not only makes the energy storage device 10 more compact and aesthetically pleasing, but also reduces the complexity and maintenance difficulty of the energy storage device 10. Direct connection reduces intermediate links and failure points, thereby reducing the maintenance cost and repair difficulty of the energy storage device 10, further reducing overall costs.

[0050] Of course, in other embodiments, the first detector 4 and the first fire extinguishing device 3 are indirectly connected through the controller 30, that is, at least one signal of the temperature, smoke concentration, and combustible gas concentration detected by the first detector 4 is transmitted to the controller 30, and the controller 30 sends a fire extinguishing instruction to the first fire extinguishing device 3 based on at least one signal of the temperature, smoke concentration, and combustible gas concentration. In this way, by achieving indirect connection through the controller 30, the scale of the energy storage device 10 can be easily expanded without making large-scale changes to the existing energy storage device 10. The controller 30 can pre-process and filter the signal from the first detector 4 to remove noise and interference, thereby improving the accuracy of the signal. At the same time, the controller 30 can also perform a comprehensive analysis of the signal according to preset algorithms and rules to more accurately judge the fire situation. The controller 30 can centrally manage and control the entire fire extinguishing system. Operation and maintenance personnel can monitor the system's operating status and alarm information in real time through the controller 30, thereby quickly understanding the safety status inside the electrical compartment 12. The controller 30 can also be connected to a remote monitoring system to achieve remote monitoring and remote control. Operation and maintenance personnel can monitor the safety status of the energy storage device 10 in real time through the remote monitoring system, and remotely start or shut down the fire extinguishing device through the controller 30 when necessary.

[0051] In addition, since the battery compartment 11 contains the heat exchange fluid 20, the first detector 4 needs to meet the special working environment conditions of the heat exchange fluid 20 immersing the battery module 2, that is, the first detector 4 needs to meet the protection level of IP67 and above to ensure that the first detector 4 can work normally in the battery compartment 11 containing the heat exchange fluid 20.

[0052] Reference Figure 2 and Figure 3In one embodiment, the first detector 4 is positioned above the top of the battery module 2. The distance between the first detector 4 and the top of the battery module 2 is H1, where H1 is ≥ 150 mm. Maintaining a certain distance between the detector and the top of the battery module 2 prevents direct contact with the battery module 2, reducing the risk of damage to the first detector 4 due to battery module 2 failures (such as leakage or overheating). The battery module 2 generates heat during operation, especially during charging or discharging. Maintaining a certain distance helps prevent heat from the battery module 2 from directly radiating to the first detector 4, ensuring that the temperature of the first detector 4 remains within the normal operating range and avoiding thermal damage or false alarms. For monitoring combustible gases or smoke, a distance of more than 150 mm allows sufficient time for the gas or smoke to diffuse, ensuring that the detector can detect a uniformly distributed gas concentration, improving monitoring accuracy and response speed. Especially when monitoring gases lighter than air, maintaining a certain height can better capture these gases, as they tend to rise and accumulate in the upper part of the space. The appropriate distance prevents maintenance personnel from easily touching the first detector 4 when inspecting or replacing the battery module 2, reducing the possibility of accidental damage. The battery module 2 may generate an electromagnetic field when working. Keeping a certain distance from the battery module 2 can reduce the impact of electromagnetic interference on the signal of the first detector 4, ensuring the stability and accuracy of the first detector 4. The distance between the first detector 4 and the top of the battery module 2 is H1, where H1 ≥ 150mm. Being able to keep the first detector 4 at a sufficient distance from the top of the battery module 2 can prevent the heat exchange fluid 20 from directly contacting the first detector 4 when it splashes or overflows, reduce the risk of heat exchange fluid 20 intrusion, and prevent short circuits or corrosion in the internal circuit of the first detector 4. The heat exchange fluid 20 will take away the heat of the battery module 2 during the circulation process. If the first detector 4 is too close to the top of the battery module 2, it may receive too much indirect heat, affecting its normal operating temperature and thus affecting the monitoring accuracy.

[0053] It should be noted that the distance between the first detector 4 and the top of the battery module 2 can be 150 mm, 151 mm, 152 mm, 159 mm, 161 mm, 165 mm, 170 mm, 179 mm, 180 mm, 187 mm or 190 mm, etc. The distance between the first detector 4 and the top of the battery module 2 can be set as needed, and this application does not limit this.

[0054] Reference Figure 2 and Figure 3In an embodiment, the first detector 4 is installed adjacent to the top wall of the battery compartment 11. In this way, many flammable gases, such as hydrogen, are lighter than air and will naturally rise after a leak. Installing the first detector 4 at a higher position can capture these gases more quickly, as they will rise upwards and accumulate at the top of the space. The first detector 4 adjacent to the top wall can detect gas leaks as early as possible, which is crucial for timely action to prevent accidents. Early detection means that emergency procedures can be initiated more quickly, reducing potential harm. Installing the first detector 4 adjacent to the top wall of the battery compartment 11 can ensure that the sensing area of the first detector 4 is not obstructed, improving detection efficiency. If there are heat-emitting elements inside the battery compartment 11, installing the first detector 4 adjacent to the top wall can reduce the impact of heat sources on the first detector 4, avoiding false positives or reducing detection accuracy. Installing the first detector 4 adjacent to the top wall can make it easier for maintenance personnel to access it for regular inspection, cleaning, and calibration, ensuring long-term stable operation of the first detector 4. For some first detectors 4 that can be affected by moisture, installing them at a higher position can avoid damage from accumulated water, especially in cases where the battery compartment 11 may have liquid substances present.

[0055] It should be noted that in other embodiments, the first detector 4 can also be installed on the top wall of the battery compartment 11. Specifically, the specific installation position of the first detector 4 can be set as needed, and the present application does not limit it.

[0056] Referring to Figure 2 and Figure 3In one embodiment, the housing 1 further includes an electrical compartment 12, which is spaced apart from the battery compartment 11. The energy storage device 10 also includes an electrical unit 5 and a second fire extinguishing device 6, both of which are installed within the electrical compartment 12. This arrangement allows the battery module 2 to generate heat, gas, or even short circuits during charging and discharging, while the electrical unit 5 may generate sparks or high temperatures due to electrical failures. This isolation design reduces the potential for these risks to interact. The second fire extinguishing device 6 installed within the electrical compartment 12 enables rapid response and effective fire suppression, tailored to the characteristics of electrical fires. Because electrical fires often spread rapidly and are difficult to control, installing the second fire extinguishing device 6 within the electrical compartment 12 minimizes damage to the energy storage device 10. By separating the electrical compartment 12 from the battery compartment 11, the internal space of the energy storage device 10 can be more efficiently utilized. Different compartments can be customized to meet the installation, heat dissipation, and maintenance requirements of the electrical unit 5 and battery module 2. The separation of the electrical compartment 12 and the battery compartment 11 facilitates maintenance and management of the battery module 2 and electrical unit 5. When repairing or replacing the electrical unit 5, battery module 2, first fire extinguishing device 3, or second fire extinguishing device 6 is required, the corresponding compartment can be operated independently without affecting the normal operation of other components. The isolation of the electrical compartment 12 and the battery compartment 11 reduces electromagnetic and thermal interference between the electrical unit 5 and the battery module 2. This helps improve the operational stability of the electrical unit 5 and the charge and discharge efficiency of the battery module 2.

[0057] It should be noted that, in one embodiment, the electrical compartment 12 and the battery compartment 11 can be spaced apart along the direction of gravity. The electrical compartment 12 can be located above or below the battery compartment 11. In another embodiment, the electrical compartment 12 and the battery compartment 11 can be spaced apart along the horizontal direction. Specifically, this application does not limit the spacing direction between the electrical compartment 12 and the battery compartment 11.

[0058] Reference Figure 3 and Figure 4In one embodiment, the second fire extinguishing device 6 is located above the electrical unit 5. This can block the path of the fire spreading upward to a certain extent, thereby preventing the fire from rapidly expanding to the entire electrical compartment 12 or other compartments, reducing the overall fire risk. The second fire extinguishing device 6 is located above the electrical unit 5, so that the fire extinguishing medium (such as inert gas) of the second fire extinguishing device 6 can be sprayed from top to bottom, thereby ensuring that the fire extinguishing medium directly reaches every corner of the electrical unit 5, improving the fire extinguishing efficiency, and after the fire is extinguished, the fire extinguishing medium can continue to cover the surface of the electrical unit 5, forming a protective layer, reducing the possibility of re-ignition. Installing the second fire extinguishing device 6 above the electrical unit 5 can make full use of the vertical space in the electrical compartment 12 and avoid occupying too much installation space for the electrical unit 5. When the second fire extinguishing device 6 needs to be maintained or replaced, since it is located above the electrical unit 5, it can usually be approached and operated more conveniently, reducing the difficulty and time cost of maintenance work.

[0059] Reference Figure 3 and Figure 4 In one embodiment, the distance between the second fire extinguishing device 6 and the electrical unit 5 is L2, where L2 is greater than 200 mm. This prevents the second fire extinguishing device 6 from directly impacting the electrical unit 5 when spraying the fire extinguishing medium, reducing possible secondary damage or interference to the electrical unit 5. The distance between the second fire extinguishing device 6 and the electrical unit 5 is greater than 200 mm, which ensures that after the second fire extinguishing device 6 is activated, its fire extinguishing medium can fully cover the electrical unit 5 and its surrounding area, achieving effective fire extinguishing. The distance between the second fire extinguishing device 6 and the electrical unit 5 is greater than 200 mm, which can reduce the potential impact of factors such as vibration and heat during the operation of the electrical unit 5 on the second fire extinguishing device 6 and reduce the risk of false triggering. During equipment maintenance or troubleshooting, personnel need to approach the electrical unit 5 for operation. The distance between the second fire extinguishing device 6 and the electrical unit 5 is greater than 200 mm, which facilitates daily maintenance, inspection, and replacement of the equipment. Personnel can more easily approach the electrical unit 5 and the second fire extinguishing device 6 for operation, reducing the difficulty and cost of maintenance work.

[0060] In one embodiment, the second fire extinguishing device 6 includes at least one of a hot aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device. The hot aerosol fire extinguishing device uses a highly efficient aerosol fire extinguishing agent, which can instantly form a large-scale, high-concentration fire extinguishing agent cloud, rapidly reducing the fire scene temperature and suppressing the combustion reaction. The hot aerosol fire extinguisher does not require a water source or an external power source, allowing for quick and flexible fire extinguishing operations, thereby effectively controlling the fire within the battery compartment 11. The hot aerosol fire extinguisher does not produce harmful gases or corrosive substances during the fire extinguishing process, and does not harm personnel or the energy storage device 10. Furthermore, the hot aerosol fire extinguishing device can automatically trigger fire extinguishing, avoiding accidents caused by improper human operation. Furthermore, the hot aerosol fire extinguisher has a short spraying time, typically completing the fire extinguishing process within seconds, reducing the risk of fire spreading. The extinguishing agent in the hot aerosol fire extinguisher does not contain water, so it does not form a conductive and corrosive electrolyte film, thereby avoiding damage to the battery module 2. The structure of the hot aerosol fire extinguishing device is relatively simple, easy to maintain, has a long service life, and is relatively low in cost. When the hot aerosol fire extinguishing device is selected for fire extinguishing, production costs can be reduced.

[0061] In addition, the fire extinguishing agent used in the perfluorohexanone fire extinguishing device is halogen-free, residue-free, and environmentally friendly. No harmful substances will be released during the fire extinguishing process, and no pollution will be caused to the atmosphere, water bodies, soil and other environments. At the same time, it will not damage the ozone layer and is harmless to the human body. At the same time. Perfluorohexanone fire extinguishing agent has multiple fire extinguishing mechanisms such as rapid gasification, heat absorption and cooling, and suppression of combustion chain reactions. It can quickly extinguish fires in a short time and reduce fire losses. Perfluorohexanone fire extinguishing agent has extremely low toxicity to the human body, is non-corrosive, and does not damage the battery module 2. At the same time, its good electrical insulation allows fire extinguishing operations to be performed under power, reducing the risk of electric shock accidents.

[0062] It should be noted that, in one embodiment, the second fire extinguishing device 6 includes one of a hot aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device. In other embodiments, the second fire extinguishing device 6 can include both a hot aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device. In this way, the fire extinguishing effect is best.

[0063] Reference Figure 3 and Figure 4In one embodiment, the first fire extinguishing device 3 is arranged adjacent to the electrical compartment 12 and is used to electrically connect to the controller 30 installed in the electrical compartment 12. In this way, the first fire extinguishing device 3 is arranged adjacent to the electrical compartment 12. This layout helps to reduce the length and complexity of the pipeline between the first fire extinguishing device 3 and the controller 30 in the electrical unit 5, thereby reducing installation and maintenance costs. In addition, since the first fire extinguishing device 3 is electrically connected to the controller 30 in the electrical compartment 12, the communication between the two is faster and more reliable. Once an abnormal situation occurs in the electrical compartment 12 (such as fire, short circuit, etc.), the controller 30 can immediately transmit a signal to the first fire extinguishing device 3, triggering it to start the fire extinguishing program, so that the first fire extinguishing device 3 can extinguish the fire in the battery compartment 11 in a timely manner.

[0064] It should be noted that the first fire extinguishing device 3 is connected to the controller 30 in the electrical compartment 12 via a wiring harness passing through the battery compartment 11 to achieve functions such as electrical control and communication. In order to ensure the sealing of the battery compartment 11 and ensure that the protection level can reach IP67, the protection level of the through-compartment electrical connector provided on the housing 1 for the display to pass through must reach IP68. In addition, the first fire extinguishing device 3 can be warm-started or electrically started. When a fire occurs in the battery compartment 11 and the temperature reaches above 185°C, a warm start is triggered, and the first fire extinguishing device 3 automatically starts to spray the fire extinguishing agent. When the first detector 4 detects a fire and the controller 30 recognizes the need for fire extinguishing, the first fire extinguishing device 3 can be electrically started to spray the fire extinguishing agent.

[0065] Reference Figure 3 In one embodiment, the energy storage device 10 further includes a power module 7 installed in the electrical compartment 12. The power module 7 is used to power the controller 30. As a dedicated power source for the controller 30, the power module 7 ensures a stable and reliable power supply to the controller 30 under all circumstances. This avoids the risk of controller 30 failure or performance degradation due to power fluctuations or insufficient power. Installing the power module 7 in the electrical compartment 12 and closely connecting it to the controller 30 reduces electromagnetic interference and signal attenuation caused by long-distance power transmission. This helps maintain the stability and accuracy of the controller 30 signal and improves the overall performance of the energy storage device 10. Installing the power module 7 directly in the electrical compartment 12 allows for more efficient space utilization, reducing the amount of external wiring and connectors. This simplifies the device structure and improves its overall aesthetics and compactness. Integrating the power module 7 and the controller 30 in the same electrical compartment 12 facilitates centralized control and management. Operations and maintenance personnel can more easily check the operating status and performance parameters of the power module 7, identifying and resolving problems promptly.

[0066] It should be noted that the installation of the power module 7 is subject to the convenient arrangement of the electrical unit 5 in the electrical compartment 12 and can be arranged near the air switch (on the electrical compartment door) to facilitate wiring of the wiring harness. Of course, in other embodiments, the installation position of the power module 7 can be adjusted as needed, and this application does not limit the installation position of the power module 7.

[0067] Reference Figures 2 to 4 In one embodiment, the first detector 4 is positioned adjacent to the electrical compartment 12. This placement simplifies wiring, reduces signal transmission delays, and improves the overall system response speed and efficiency. Installing the first detector 4 near the electrical compartment 12 reduces the need for additional infrastructure, such as unnecessary piping and cabling, thereby optimizing project costs.

[0068] It should be noted that the first detector 4 includes at least one of a first temperature sensor, a first smoke sensor and a combustible gas concentration sensor.

[0069] In one embodiment, the first detector 4 includes a first temperature sensor, a first smoke sensor, and a combustible gas concentration sensor, all of which are integrated into one unit. This integrated design reduces the space required for separate installations of the first temperature sensor, first smoke sensor, and combustible gas concentration sensor, making the first detector 4 more compact and easier to install within limited spaces. The integrated design of the first temperature sensor, first smoke sensor, and combustible gas concentration sensor facilitates installation and maintenance. Requiring only a single installation, this reduces wiring and debugging workload, while also lowering maintenance costs and complexity. Data from the first temperature sensor, first smoke sensor, and combustible gas concentration sensor can be collected and processed through a single interface, simplifying data transmission and analysis and improving the efficiency and accuracy of information integration. The integrated design allows the first temperature sensor, first smoke sensor, and combustible gas concentration sensor to share a common environment, enabling mutual verification of detection results and improving overall detection accuracy and reliability. For example, when both temperature and combustible gas concentration increase simultaneously, potential hazardous situations can be identified more quickly. In addition, the integrated setting of the first temperature sensor, the first smoke sensor and the combustible gas concentration sensor can integrate the information of multiple sensors and use algorithms to determine whether an emergency situation really exists, thereby reducing false alarms that may be caused by a single sensor.

[0070] In an embodiment, the first temperature sensor comprises at least one of a bar-type fixed temperature rate-of-rise detector, a rate-of-rise heat generating assembly, a thermocouple sensor, and a thermistor probe. The first smoke sensor comprises at least one of an ionization smoke sensor, an infrared type flammable gas detector, a photoelectric sensor, and a semiconductor gas detector. The flammable gas concentration sensor comprises at least one of a catalytic combustion sensor, a semiconductor gas sensor, an infrared sensor, a gas sensitive element sensor, and a photoionization sensor.

[0071] It should be noted that the type of the first temperature sensor, the type of the first smoke sensor, and the type of the flammable gas concentration sensor can be selected as needed, and the present application does not limit them.

[0072] Referring to Figure 4 In an embodiment, the energy storage device 10 further comprises a second detector 8 installed in the electrical cabin 12 and above the electrical unit 5. The second detector 8 is used to detect the temperature or smoke concentration in the electrical cabin 12. In this way, the electrical unit 5 in the electrical cabin 12 may, during operation, generate excessive heat or smoke due to various reasons (such as overload, short circuit, aging, etc.). Placing the second detector 8 above the electrical unit 5 can capture these abnormal conditions earlier, thereby timely sending a fire warning signal, which helps to reduce the damage of the fire to the energy storage device 10. Since the second detector 8 is directly above the electrical unit 5, it can more accurately perceive the environmental changes in the electrical cabin 12. Compared with detectors installed in other positions, this layout reduces detection errors caused by distance and obstacles, improving the accuracy and reliability of fire warning. The second detector 8 is connected to the second fire extinguishing device 6, which is used for fire extinguishing according to the temperature or smoke concentration. In this way, when abnormal conditions (such as temperature rise, smoke generation) occur in the electrical cabin 12, the second detector 8 can quickly perceive and send a signal. Since it is connected to the second fire extinguishing device 6, this signal can trigger the fire extinguishing device to start, achieving immediate response. When the second fire extinguishing device 6 starts, it can quickly release an appropriate amount of fire extinguishing agent according to the severity of the fire detected. This rapid fire extinguishing capability helps to extinguish the fire at the initial stage, preventing the spread and expansion of the fire. By detecting the temperature or smoke concentration, the second fire extinguishing device 6 can more accurately determine the location and scale of the fire. This helps to achieve precise fire extinguishing, i.e., only the fire source is extinguished, reducing the impact on the surrounding equipment and environment. Since the second detector 8 is connected to the second fire extinguishing device 6, automation control is achieved, thus greatly simplifying the management work.

[0073] It should be noted that in one embodiment, the second detector 8 and the second fire extinguishing device 6 can be directly connected. This allows the second fire extinguishing device 6 to directly receive signals such as temperature or smoke concentration detected by the second detector 8. The second fire extinguishing device 6 then performs fire extinguishing operations based on these signals. This direct connection eliminates intermediaries, allowing the second detection signal to be transmitted to the second fire extinguishing device 6 with virtually no delay. This ensures that the second fire extinguishing device 6 receives fire information immediately and responds immediately. Due to the efficient signal transmission, the second fire extinguishing device 6 can be activated more quickly and effective fire extinguishing measures can be implemented at the earliest possible stage. This helps to quickly control the fire, prevent its spread and expansion, and thus reduce losses. The direct connection allows the second fire extinguishing device 6 to directly receive the original signal from the second detector 8, avoiding signal attenuation and distortion during transmission. This helps the second fire extinguishing device 6 to more accurately determine the fire situation and adopt appropriate fire extinguishing strategies based on the actual situation. The direct connection simplifies the structure of the energy storage device 10 and reduces the number of intermediate devices and connecting cables. This not only makes the energy storage device 10 more compact and aesthetically pleasing, but also reduces the complexity and maintenance difficulty of the energy storage device 10. Direct connection reduces intermediate links and failure points, thereby reducing the maintenance cost and repair difficulty of the energy storage device 10, further reducing overall costs.

[0074] Of course, in other embodiments, the second detector 8 and the second fire extinguishing device 6 are indirectly connected via the controller 30. Specifically, signals such as temperature or smoke concentration detected by the second detector 8 are transmitted to the controller 30, which then sends fire extinguishing instructions to the second fire extinguishing device 6 based on these signals. This indirect connection via the controller 30 facilitates expansion of the energy storage device 10 without requiring major modifications to the existing energy storage device 10. The controller 30 can preprocess and filter the signals from the second detector 8 to remove noise and interference, thereby improving signal accuracy. Furthermore, the controller 30 can perform comprehensive analysis of the signals based on preset algorithms and rules to more accurately determine the fire situation. The controller 30 provides centralized management and control of the entire fire extinguishing system. Operations and maintenance personnel can monitor the system's operating status and alarm information in real time through the controller 30, quickly understanding the safety status within the electrical compartment 12. The controller 30 can also be connected to a remote monitoring system for remote monitoring and control. Operations and maintenance personnel can monitor the safety status of the energy storage device 10 in real time through the remote monitoring system and remotely activate or deactivate the fire extinguishing device through the controller 30 when necessary.

[0075] Reference Figures 2 to 4In one embodiment, the second detector 8 is installed on the top wall of the electrical compartment 12. In this way, the smoke tends to rise naturally in the electrical compartment 12, and the second detector 8 is installed on the top wall of the electrical compartment 12 to ensure that the smoke is detected in a timely and effective manner before the smoke reaches a dangerous concentration. The second detector 8 installed on the top wall of the electrical compartment 12 is not easily blocked by the electrical unit 5 or other objects, ensuring that the sensing area of ​​the second detector 8 is unobstructed, thereby improving the accuracy and range of detection. The top wall position can avoid the influence of factors such as temperature gradients and airflow disturbances that may exist near the ground or walls on the detector, reducing the possibility of false alarms. The second detector 8 at the top wall position is usually easier to access, which is convenient for maintenance personnel to conduct regular inspections, cleaning or replacement of sensors, ensuring the long-term stable operation of the second detector 8.

[0076] It should be noted that the second fire extinguishing device 6 can be warm-started or electrically-started. When a fire occurs in the electrical compartment 12 and the temperature reaches above 185°C, the warm start is triggered, and the second fire extinguishing device 6 automatically starts to execute the fire extinguishing agent spraying action. When the second detector 8 detects a fire and the controller 30 recognizes the need for fire extinguishing, the second fire extinguishing device 6 can be electrically started to execute the fire extinguishing agent spraying action.

[0077] It should be noted that the second detector 8 includes at least one of a second temperature sensor and a second smoke sensor.

[0078] In one embodiment, the second detector 8 includes a second temperature sensor and a second smoke sensor, and the second temperature sensor and the second smoke sensor are integrated into one body. In this way, the integrated design can reduce the need for installation space. In addition, the second temperature sensor and the second smoke sensor are integrated into one body, so that only one integrated second detector 8 needs to be installed instead of two independent second temperature sensors and second smoke sensors, which simplifies the installation process, reduces the workload of wiring and debugging, and is also more convenient during maintenance and inspection. The integrated second temperature sensor and the second smoke sensor can ensure the synchronization and consistency of data acquisition, avoiding possible time differences or data mismatches. In addition, the temperature and smoke data can be verified with each other to improve the accuracy and reliability of the alarm. For example, if temperature anomalies and smoke are detected at the same time, the energy storage device 10 can trigger the alarm more confidently.

[0079] In one embodiment, the second temperature sensor includes at least one of a rod-shaped constant temperature temperature detector, a temperature-sensitive magnetic generator assembly, and a thermistor probe. The second smoke sensor includes at least one of an ion smoke sensor, an infrared combustible gas detector, and a semiconductor gas detector.

[0080] It should be noted that the type of the second temperature sensor and the type of the second smoke sensor can be selected as needed, and this application does not limit this.

[0081] Reference Figures 1 to 3 In one embodiment, the fire protection component also includes an audible and visual alarm 9, which is installed in the housing 1. The audible and visual alarm 9, the first fire extinguishing device 3, the first detector 4, the second fire extinguishing device 6 and the second detector 8 are all electrically connected to the controller 30. In this way, the audible and visual alarm 9 can quickly attract people's attention in the early stages of a fire through the dual warning methods of sound and light. The high-decibel sound signal and the flashing and eye-catching light can effectively penetrate the smoke and noisy environment to ensure that the fire information is perceived in time. Through the electrical connection with the controller 30, the audible and visual alarm 9 can receive the fire signal from the first detector 4 and the second detector 8 in real time. Once the detector detects a fire or an abnormal situation, the controller 30 will immediately trigger the audible and visual alarm 9 to achieve a rapid response. When it is determined that a fire has occurred, the controller 30 will activate at least one of the first fire extinguishing device 3 and the second fire extinguishing device 6 to extinguish the fire and prevent the spread of the fire. The sound and light alarm 9 works in conjunction with the first fire extinguishing device 3, the first detector 4, the second fire extinguishing device 6, and the second detector 8 to form a complete fire prevention and control system. The coordinated cooperation between these components provides comprehensive, multi-layered fire prevention and control for the energy storage device 10. This helps reduce the probability of fire and the extent of damage, ensuring the safety of personnel and equipment.

[0082] Furthermore, the controller 30 can be programmed to implement a coordinated response. That is, when the first detector 4 or the second detector 8 detects an anomaly, in addition to triggering the audible and visual alarm 9, it can also automatically activate the firefighting system, shut down the power, and activate the exhaust system, thereby quickly implementing safety measures. The controller 30 can receive multi-level warning signals from the first detector 4 and the second detector 8, make multi-level firefighting decisions, send decision signals to the audible and visual alarm 9, and output fire alarm information to the user.

[0083] Reference Figure 1 、 Figure 4 and Figure 5In one embodiment, the housing 1 is further provided with an exhaust port connected to the battery compartment 11. The exhaust port is located above the battery module 2. The energy storage device 10 also includes a balancing valve 101, which is installed at the exhaust port. The balancing valve 101 is used to balance the pressure inside and outside the battery compartment 11. In this way, the balancing valve 101 can adjust the pressure difference between the inside and outside of the battery compartment 11, preventing damage to the battery module 2 or the housing 1 structure caused by excessive internal pressure. When the pressure in the battery compartment 11 rises abnormally, the balancing valve 101 can automatically open to release excess pressure, thereby avoiding the risk of compartment rupture or explosion. The balancing valve 101 is normally closed when not in operation, preventing external dust, moisture, and harmful gases from entering the battery compartment 11, protecting the battery module 2 from external environmental influences and extending battery life. The exhaust port and balancing valve 101 allow the battery compartment 11 to exchange necessary gases with the external environment, such as discharging vapor generated by evaporation of the heat exchange fluid 20 during thermal management or releasing harmful gases that may be generated during battery failure, while also preventing excessive decompression. The provision of the balancing valve 101 and the exhaust port helps to optimize the thermal management of the battery compartment 11, ensuring that the heat exchange fluid 20 can circulate effectively, remove the heat generated by the battery during operation, and maintain the battery within the optimal operating temperature range.

[0084] Reference Figure 1 、 Figure 4 and Figure 5 In one embodiment, the housing 1 is further provided with an explosion vent connected to the battery compartment 11. The explosion vent is located above the battery module 2. The energy storage device 10 further includes an explosion vent plate 102. The explosion vent plate 102 seals the explosion vent. In this way, the design of the explosion vent and the explosion vent plate 102 can release pressure in time to prevent the battery compartment 11 from exploding when an abnormal situation occurs in the battery compartment 11, such as thermal runaway, internal short circuit, or other situations that cause rapid accumulation of gas and a sharp rise in pressure. The explosion vent is usually designed above the battery module 2 so that when the pressure is released, the gas and possible flames will be released upward rather than to the surrounding environment, reducing damage to surrounding equipment or personnel. The explosion vent plate 102 serves as a sealing device for the explosion vent. Under normal circumstances, it keeps the battery compartment 11 sealed and will only open when the pressure reaches a set threshold. This control mechanism can avoid unnecessary gas leakage while ensuring a rapid response in an emergency. In non-extreme situations, the explosion vent plate 102 remains sealed, preventing external contaminants such as moisture and dust from entering the battery compartment 11 and protecting the battery components from corrosion or short-circuit risks. The explosion vent design reduces the additional pressure on the battery compartment 11 walls, preventing deformation or rupture of the housing 1 due to excessive pressure, and enhancing the structural stability and service life of the entire energy storage device 10. Compared to a completely enclosed energy storage device 10, an energy storage device 10 with an explosion vent mechanism can reduce failures caused by internal pressure issues and reduce the frequency and cost of maintenance and component replacement.

[0085] It should be noted that the balancing valve 101 and the explosion relief plate 102 both comply with the protection level of IP67 and above, and meet the working conditions of immersion thermal management.

[0086] Reference Figure 1 、 Figure 4 and Figure 5 In one embodiment, the exhaust port is located at the top of the shell 1. In this way, many gases (including steam generated by the evaporation of the heat exchange fluid 20) are lighter than air and will naturally rise. Setting the exhaust port at the top can take advantage of the natural upward trend of the gas, allowing the gas to be discharged more smoothly without the need for additional extraction equipment. In the event of a gas leak or abnormal pressure, the top exhaust port can quickly release the pressure, reduce the risk of explosion or combustion, and protect the safety of equipment and personnel. The exhaust port is located at the top, making it easier for maintenance personnel to access it when inspecting or cleaning, without having to go deep into the equipment, thereby improving the convenience and safety of maintenance. The exhausted gas or steam will not blow directly onto the equipment or the ground below, reducing the risk of corrosion to the equipment below or causing slippery problems on the ground. The exhaust port is usually set at the highest point of the equipment to take advantage of the natural gas flow pattern, reduce energy consumption, and improve the overall efficiency of the system. The design of the top exhaust port facilitates the installation of pressure regulating components such as the balancing valve 101 to ensure the balance of pressure inside and outside the battery compartment 11, while simplifying the structure and wiring of the system.

[0087] Reference Figure 1 、 Figure 4 and Figure 5 In one embodiment, the explosion vent is located at the top of the housing 1. This allows the energy storage device 10 to release high-pressure gas or steam upward when pressure rises abnormally, requiring emergency pressure relief. This top vent prevents direct damage to surrounding personnel or equipment, particularly by spraying downward, reducing the risk of injury to personnel on the ground. This top vent reduces the impact of pressure relief on structures below or surrounding the device, preventing the splashing of debris or liquid, and minimizing the potential for secondary damage. Utilizing gravity, the top vent allows gas to naturally rise and disperse rapidly, helping to reduce the force and range of the explosion while minimizing the impact on ground or lower-lying equipment. Positioning the top vent away from operators and normal activity areas reduces exposure to potential hazards and enhances the safety of the energy storage device 10 operating environment. The top vent facilitates installation of the explosion vent plate 102 or other pressure relief devices, as well as routine inspection and maintenance, ensuring the reliability and effectiveness of the pressure relief mechanism. The top vent reduces direct impact on vegetation or building surfaces during pressure relief, minimizing negative environmental impacts.

[0088] It should be noted that if a fire occurs inside the battery compartment 11, the balancing valve 101 cannot adjust the internal and external air pressure. When the internal air pressure of the battery compartment 11 reaches the explosion relief threshold, the explosion relief plate 102 is triggered to relieve pressure and explosion, thereby preventing secondary combustion and explosion damage caused by thermal runaway of the energy storage device 10 (the hazards of combustion and explosion are often far greater than the hazards of thermal runaway of the battery module 2).

[0089] The fire protection system logic design of the energy storage device 10 is described in detail below:

[0090] When the first detector 4 detects one of the temperature, smoke concentration and combustible gas, the fire protection system early warning mode is triggered, and an early warning signal is transmitted to the controller 30, and abnormal information is fed back. When the first detector 4 detects a composite early warning signal (smoke and combustible gas) or an alarm temperature signal, the fire protection system alarm mode is triggered, and an alarm signal is transmitted to the controller 30. The controller 30 controls the sound and light alarm 9 to alarm. The first fire extinguishing device 3 starts and executes the fire extinguishing agent spraying action to extinguish the battery compartment 11. When the air pressure in the battery compartment 11 reaches the threshold, the explosion relief plate 102 is triggered to relieve pressure and prevent explosion. When the second detector 8 detects temperature or smoke concentration, the fire protection system alarm mode is triggered, and an alarm signal is transmitted to the controller 30. The controller 30 controls the sound and light alarm 9 to alarm. The second fire extinguishing device 6 starts and executes the fire extinguishing agent spraying action to extinguish the battery compartment 11.

[0091] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An energy storage device, characterized in that: include: The housing is formed with a battery compartment, wherein the battery compartment is used to contain a heat exchange fluid; a battery module, mounted in the battery compartment, the battery module being immersed in the heat exchange fluid; A first fire extinguishing device is installed in the battery compartment and is above the liquid level of the heat exchange fluid.

2. The energy storage device according to claim 1, characterized in that The distance between the first fire extinguishing device and the liquid level of the heat exchange liquid is L1, wherein L1>200mm.

3. The energy storage device according to claim 1, characterized in that The first fire extinguishing device includes at least one of a hot aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device; and / or, The first fire extinguishing device is wall-mounted on the bulkhead of the battery compartment.

4. The energy storage device according to claim 1, characterized in that The energy storage device further includes a first detector installed in the battery compartment, for detecting at least one of a temperature, a smoke concentration, and a combustible gas concentration in the battery compartment; The first detector is connected to the first fire extinguishing device, and the first fire extinguishing device is used to extinguish the fire according to at least one of the temperature, the smoke concentration and the combustible gas.

5. The energy storage device according to claim 4, characterized in that The first detector is located above the battery module, and the distance between the first detector and the top of the battery module is H1, where H1 is ≥ 150 mm.

6. The energy storage device according to any one of claims 1 to 5, characterized in that: The housing is further formed with an electrical compartment, wherein the electrical compartment and the battery compartment are spaced apart; The energy storage device further includes an electrical unit and a second fire extinguishing device, and both the electrical unit and the second fire extinguishing device are installed in the electrical compartment.

7. The energy storage device according to claim 6, characterized in that The distance between the second fire extinguishing device and the electrical unit is L2, where L2>200mm.

8. The energy storage device according to claim 6, characterized in that: The second fire extinguishing device includes at least one of a thermal aerosol fire extinguishing device and a perfluorohexanone fire extinguishing device.

9. The energy storage device according to claim 6, characterized in that: The first fire extinguishing device is arranged adjacent to the electrical compartment and is used to be electrically connected to a controller installed in the electrical compartment.

10. The energy storage device according to claim 6, characterized in that: The energy storage device further includes a second detector, which is installed in the electrical compartment and above the electrical unit, and is used to detect the temperature or smoke concentration in the electrical compartment; The second detector is connected to the second fire extinguishing device, and the second fire extinguishing device is used to extinguish the fire according to the temperature or smoke concentration.

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