Battery module ejection fire-fighting device in battery compartment of liquid cooling energy storage system

Abstract

The utility model discloses a battery module ejection fire-fighting device in a liquid cooling energy storage system battery cabin, and belongs to the technical field of energy storage battery fire fighting. Comprising an ejection mechanism used for ejecting the liquid cooling energy storage battery module along a battery rack when being triggered, ejection window plates used for plugging ejection windows formed in a container cabin door of the liquid cooling energy storage system in a one-to-one correspondence manner, and a control mechanism used for linking the liquid cooling energy storage system, the ejection mechanism and the ejection window plates. According to the utility model, hydraulic driving and explosion-proof motor linkage control are adopted, the ejection action of the battery module is completed immediately after a thermal runaway signal is detected, and through the collaborative design of the ejection mechanism and the ejection window plate, the convection of high-temperature flue gas and the diffusion path of combustible gas are effectively cut off, and the thermal runaway is prevented from spreading; meanwhile, through three-dimensional monitoring of the battery module-level composite detector and the cabin-level monitoring assembly, a multi-level detection system is formed, and rapid physical isolation and directional removal of the thermal runaway battery module are achieved.

Description

Technical Field

[0001] This utility model relates to a fire-fighting device for ejecting battery modules inside the battery compartment of a liquid-cooled energy storage system, belonging to the field of fire-fighting technology for energy storage batteries. Background Technology

[0002] As the global energy structure transitions towards low-carbon development, electrochemical energy storage technology, represented by lithium-ion batteries, has become a crucial supporting infrastructure for new energy power generation systems. During the construction of new power systems, the deployment scale of large-scale energy storage power stations continues to expand, with the installed capacity of their core energy storage unit—the battery module—exponentially increasing. Due to the inherent thermal instability of battery materials, when a single battery module experiences thermal runaway, existing conventional fire suppression systems typically employ extinguishing agents such as perfluorohexanone or aerosols for overall spraying or gas coverage. While these solutions can initially suppress the fire source, the difficulty in precisely controlling the effective range of the extinguishing agents makes it highly susceptible to thermal runaway propagation paths within the densely packed energy storage compartment. On one hand, high-temperature smoke forms thermal convection channels between adjacent modules, leading to a continuous accumulation of thermal radiation energy; on the other hand, pressure fluctuations generated by the extinguishing agent injection may disrupt the physical spacing between battery modules, causing volatile electrolyte vapors to diffuse and migrate under negative pressure.

[0003] The aforementioned coupling effect will significantly lower the thermal runaway critical temperature of the battery system, ultimately triggering a domino-like cascading failure reaction and causing the entire energy storage system to fail. This technical defect directly restricts the operational reliability of large-scale energy storage power stations and significantly increases the cost of handling fire accidents and the risk of secondary disasters. Utility Model Content

[0004] To address the problems existing in the background technology, this utility model provides a battery module ejection fire-fighting device in the battery compartment of a liquid-cooled energy storage system.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a battery module ejection and fire suppression device for a liquid-cooled energy storage system, comprising...

[0006] The ejection mechanism is installed on the battery rack inside the battery compartment and is set one-to-one with the rear end of the liquid-cooled energy storage battery module. It is used to eject the liquid-cooled energy storage battery module along the battery rack when triggered.

[0007] The ejection window plate is sealed one by one with the ejection windows opened on the container door of the liquid-cooled energy storage system. It is connected to the output shaft of the motor. The ejection windows are set one by one with the front end of the liquid-cooled energy storage battery module, and the size of the ejection window is larger than the external size of the corresponding liquid-cooled energy storage battery module.

[0008] The control mechanism is used to link the liquid-cooled energy storage system, the ejection mechanism, and the ejection window.

[0009] The battery compartment temperature and smoke detection components are installed on the top of the battery compartment and are connected to the control mechanism for signal transmission. They are used to detect high temperature signals and smoke signals inside the battery compartment.

[0010] The combustible gas detection component for the battery compartment is installed on the top of the battery compartment. It includes an H2 combustible gas detector and a CO combustible gas detector. It is connected to the control mechanism for signal transmission and is used to detect the concentration of combustible gas in the battery compartment.

[0011] The battery module composite detector, installed at the front end of the liquid-cooled energy storage battery module, includes an H2 sensor, a CO sensor, and a temperature sensor. It is in direct contact with the battery cell assembly of the liquid-cooled energy storage battery module, performs PACK-level detection of the liquid-cooled energy storage battery module, and is connected to the control mechanism for signal transmission. It is used to monitor the surface temperature of the battery cells and the internal leakage of combustible gases in real time.

[0012] Furthermore, the ejection mechanism includes a hydraulic drive unit and a limiting guide unit; both ends of the limiting guide unit are slidably connected to the battery rack, the rear end of the limiting guide unit is fixedly connected to one end of the hydraulic drive unit, and the other end of the hydraulic drive unit is fixedly connected to the battery rack.

[0013] Furthermore, the hydraulic drive unit includes a hydraulic accumulator and a fast solenoid valve. The fast solenoid valve is connected to the control mechanism for signal transmission and is used to release hydraulic oil after receiving a trigger signal.

[0014] Furthermore, the liquid-cooled energy storage battery module is equipped with rollers at its bottom.

[0015] Furthermore, the edges of the container door are equipped with sealing strips to isolate the battery compartment from the external environment.

[0016] Furthermore, the sealing strip is made of high-temperature resistant silicone.

[0017] Furthermore, the edge of the ejection window is provided with an elastic buffer layer to reduce the impact force when the liquid-cooled energy storage battery module is ejected.

[0018] Furthermore, the motor is an explosion-proof servo motor equipped with a position feedback sensor. Both the feedback sensor and the motor are connected to the control mechanism for signal transmission. The feedback sensor is used to monitor the opening status of the ejection window in real time and provide feedback to the control mechanism.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention employs a hydraulic drive and explosion-proof motor linkage control system to instantly eject the battery module upon detecting a thermal runaway signal. Through the coordinated design of the ejection mechanism and ejection window, it effectively cuts off the convection of high-temperature flue gas and the diffusion path of combustible gases, preventing the spread of thermal runaway. Simultaneously, a multi-level detection system is formed through the three-dimensional monitoring of the battery module-level composite detector and the cabin-level monitoring components, enabling rapid physical isolation and directional removal of the thermal runaway battery module. This effectively solves the technical defects of existing technologies, such as uncontrollable fire extinguishing medium coverage and difficulty in blocking thermal runaway propagation paths. It significantly improves the timeliness and accuracy of thermal runaway early warning, upgrading fire response from passive suppression to active isolation, and significantly reducing the operational risks and disaster losses of large-scale energy storage power stations. Attached Figure Description

[0021] Figure 1 This is a top view of the present invention;

[0022] Figure 2 This is the front view of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of a liquid-cooled energy storage battery module;

[0024] Figure 4 This is a schematic diagram of the ejection mechanism;

[0025] Figure 5 This is a schematic diagram showing the connection between the ejection window plate and the motor. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0027] A battery module ejection and fire suppression device for a liquid-cooled energy storage system, comprising:

[0028] The ejection mechanism 2 is installed on the battery rack 8 inside the battery compartment and is set one-to-one with the rear end of the liquid-cooled energy storage battery module 1. It is used to eject the liquid-cooled energy storage battery module 1 along the battery rack 8 when triggered.

[0029] The ejection window plate 6 corresponds to and seals the ejection windows on the container door 5 of the liquid-cooled energy storage system. It is connected to the output shaft of the motor 12. Specifically, the motor 12 is fixed to the container door 5, and its output shaft is coaxially fixedly connected to the shaft 13 via a coupling. A mounting base 14 is coaxially fixedly fitted onto the outer side of the shaft 13. The outer wall of the mounting base 14 is fixedly connected to one side of the ejection window plate 6. The rotation of the motor 12 drives the ejection window plate 6 to open and close. The ejection windows are correspondingly positioned at the front end of the liquid-cooled energy storage battery module 1, and the size of the ejection window is larger than the external dimensions of the corresponding liquid-cooled energy storage battery module 1.

[0030] The control mechanism is used to link the liquid-cooled energy storage system, the ejection mechanism 2, and the ejection window 6.

[0031] The battery compartment temperature and smoke detection assembly 3 is installed on the top of the battery compartment and is connected to the control mechanism for signal transmission. It is used to detect high temperature signals and smoke signals inside the battery compartment. It includes at least two sets of temperature sensors and at least two sets of smoke sensors, which are installed at two opposite corners on the top of the battery compartment.

[0032] The combustible gas detection component 4 for the battery compartment is installed at a diagonal position on the top of the battery compartment. It includes an H2 combustible gas detector and a CO combustible gas detector, and is connected to the control mechanism for signal transmission to detect the concentration of combustible gas in the battery compartment.

[0033] The battery module composite detector 7 is installed at the front end of the liquid-cooled energy storage battery module 1. It includes an H2 sensor, a CO sensor, and a temperature sensor. It is in direct contact with the cell assembly of the liquid-cooled energy storage battery module 1 to perform PACK-level detection of the liquid-cooled energy storage battery module 1. It is connected to the control mechanism for signal transmission and is used to monitor the surface temperature of the cells and the internal leakage of combustible gases in real time.

[0034] Furthermore, the ejection mechanism 2 includes a hydraulic drive unit 9 and a limiting guide unit 10; both ends of the limiting guide unit 10 are slidably connected to the battery rack 8 via a track assembly, which is used to ensure that the liquid-cooled energy storage battery module 1 ejects in a preset direction. The rear end of the limiting guide unit 10 is fixedly connected to one end of the hydraulic drive unit 9, and the other end of the hydraulic drive unit 9 is fixedly connected to the battery rack 8.

[0035] Furthermore, the hydraulic drive unit 9 includes a hydraulic accumulator and a fast solenoid valve. The fast solenoid valve is connected to the control mechanism for signal transmission and is used to quickly release hydraulic oil within 0.2 seconds after receiving a trigger signal, thereby achieving instantaneous ejection force output.

[0036] Furthermore, the bottom of the liquid-cooled energy storage battery module 1 is equipped with rollers to reduce friction and ensure that it is smoothly ejected from the battery rack 8 when the ejection mechanism 2 is activated. The rollers are omnidirectional rollers and are evenly distributed at the four corners of the bottom of the liquid-cooled energy storage battery module 1.

[0037] Furthermore, the container door 5 is provided with a sealing strip along its circumference to isolate the battery compartment from the external environment. The sealing strip maintains negative pressure inside the compartment through a pneumatic sealing device to prevent external air from flowing back in and causing secondary combustion.

[0038] Furthermore, the sealing strip is made of high-temperature resistant silicone.

[0039] Furthermore, the edge of the ejection window plate 6 is provided with an elastic buffer layer along its circumference to reduce the impact force when the liquid-cooled energy storage battery module 1 is ejected.

[0040] Furthermore, the motor is an explosion-proof servo motor equipped with a position feedback sensor. Both the feedback sensor and the motor are connected to the control mechanism for signal transmission. The feedback sensor is used to monitor the opening status of the ejection window 6 in real time and provide feedback to the control mechanism.

[0041] The present invention discloses a method for operating a battery module ejection and fire suppression device in the battery compartment of a liquid-cooled energy storage system, the method comprising the following steps:

[0042] S1: Detection: The battery compartment temperature and smoke sensor 3 and the battery compartment combustible gas detection component 4 monitor the temperature, smoke and H2 and CO concentration in the battery compartment in real time, and the battery module composite detector 7 monitors the cell temperature and internal combustible gas of the liquid-cooled energy storage battery module 1 in real time.

[0043] S2: Signal Trigger: When any one of the battery compartment temperature and smoke sensor 3, battery compartment combustible gas detection component 4, and battery module composite detector 7 detects a thermal runaway signal (high temperature, smoke, combustible gas concentration exceeding the standard), it determines that the triggering conditions are met and sends a trigger signal to the control mechanism.

[0044] The triggering condition is any one of the following:

[0045] The battery compartment temperature detected by the battery compartment temperature and smoke sensor component 3 is greater than or equal to the preset battery compartment temperature threshold.

[0046] The smoke concentration in the battery compartment detected by the battery compartment temperature and smoke sensor component 3 is greater than or equal to the preset battery compartment smoke concentration threshold.

[0047] The H2 concentration detected by the combustible gas detection component 4 in the battery compartment is greater than or equal to the preset H2 threshold in the battery compartment.

[0048] The CO concentration detected by the combustible gas detection component 4 in the battery compartment is greater than or equal to the preset CO threshold in the battery compartment.

[0049] The cell temperature detected by the battery module composite detector 7 is greater than or equal to the preset cell temperature threshold.

[0050] The H2 / CO concentration inside the battery cell detected by the battery module composite detector 7 is greater than or equal to the preset battery cell gas concentration threshold.

[0051] S3: Linkage execution: After receiving the trigger signal, the control mechanism synchronously controls the motor 12 to open the ejection window 6 and starts the hydraulic drive unit 9 of the ejection mechanism 2;

[0052] S4: Ejection: The ejection mechanism 2 ejects the liquid-cooled energy storage battery module 1 along the battery rack 8 through the limiting guide unit 10, so that the liquid-cooled energy storage battery module 1 leaves the battery compartment through the ejection window, thereby not affecting the safety status of other liquid-cooled energy storage battery modules 1 and preventing heat diffusion caused by combustion.

[0053] After receiving the trigger signal, the control mechanism first opens the ejection window 6, and after the ejection window 6 is fully opened, it starts the ejection mechanism 2 after a delay of 0.5-1 seconds to ensure that the ejection path is unobstructed.

[0054] The ejection speed of the liquid-cooled energy storage battery module 1 is 1-2 m / s, and the ejection distance is ≥1.5 meters outside the battery compartment to ensure complete isolation from adjacent battery modules and the compartment.

[0055] S5: Isolation: The sealing strip of container door 5 keeps the cabin sealed after the liquid-cooled energy storage battery module 1 is ejected, preventing heat from spreading to the external environment.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery module ejection and fire suppression device for a liquid-cooled energy storage system, characterized in that: include The ejection mechanism (2) is installed on the battery rack (8) inside the battery compartment and is set one-to-one with the rear end of the liquid-cooled energy storage battery module (1). It is used to eject the liquid-cooled energy storage battery module (1) along the battery rack (8) when triggered. The ejection window plate (6) is sealed one by one with the ejection windows opened on the container door (5) of the liquid-cooled energy storage system, and is connected to the output shaft of the motor (12). The ejection windows are set one by one with the front end of the liquid-cooled energy storage battery module (1), and the size of the ejection window is larger than the outer size of the corresponding liquid-cooled energy storage battery module (1). A control mechanism is used to link the liquid-cooled energy storage system, the ejection mechanism (2), and the ejection window (6).

2. The battery module ejection and fire suppression device in the battery compartment of a liquid-cooled energy storage system according to claim 1, characterized in that: The ejection mechanism (2) includes a hydraulic drive unit (9) and a limiting guide unit (10); both ends of the limiting guide unit (10) are slidably connected to the battery rack (8), the rear end of the limiting guide unit (10) is fixedly connected to one end of the hydraulic drive unit (9), and the other end of the hydraulic drive unit (9) is fixedly connected to the battery rack (8).

3. The battery module ejection and fire suppression device in the battery compartment of a liquid-cooled energy storage system according to claim 2, characterized in that: The hydraulic drive unit (9) includes a hydraulic accumulator and a fast solenoid valve. The fast solenoid valve is connected to the control mechanism for signal transmission and is used to release hydraulic oil after receiving a trigger signal.

4. The battery module ejection and fire suppression device in the battery compartment of a liquid-cooled energy storage system according to claim 1, characterized in that: The bottom of the liquid-cooled energy storage battery module (1) is provided with rollers.

5. A battery module ejection and fire suppression device for a liquid-cooled energy storage system battery compartment according to claim 1 or 4, characterized in that: The edge of the container door (5) is provided with a sealing strip to isolate the battery compartment from the external environment.

6. The battery module ejection fire suppression device in the battery compartment of a liquid-cooled energy storage system according to claim 5, characterized in that: The sealing strip is made of high-temperature resistant silicone.

7. The battery module ejection and fire suppression device in the battery compartment of a liquid-cooled energy storage system according to claim 6, characterized in that: The edge of the ejection window plate (6) is provided with an elastic buffer layer to reduce the impact force when the liquid-cooled energy storage battery module (1) is ejected.

8. The battery module ejection fire suppression device in the battery compartment of a liquid-cooled energy storage system according to claim 1, characterized in that: The motor is an explosion-proof servo motor equipped with a position feedback sensor. The feedback sensor and the motor are both connected to the control mechanism for signal transmission. The feedback sensor is used to monitor the opening status of the ejection window plate (6) in real time and feed it back to the control mechanism.

9. A battery module ejection and fire suppression device for a liquid-cooled energy storage system battery compartment according to claim 1 or 8, characterized in that: The ejection fire-fighting device also includes: The battery compartment temperature and smoke sensor assembly (3) is installed on the top of the battery compartment and is connected to the control mechanism for signal transmission. It is used to detect high temperature signals and smoke signals inside the battery compartment. The combustible gas detection component (4) in the battery compartment is installed on the top of the battery compartment. It includes an H2 combustible gas detector and a CO combustible gas detector. It is connected to the control mechanism for signal transmission and is used to detect the concentration of combustible gas in the battery compartment. The battery module composite detector (7) is installed at the front end of the liquid-cooled energy storage battery module (1). It includes an H2 sensor, a CO sensor and a temperature sensor. It is in direct contact with the cell group of the liquid-cooled energy storage battery module (1) to perform PACK-level detection on the liquid-cooled energy storage battery module (1). It is connected to the control mechanism for signal transmission and is used to monitor the surface temperature of the cell and the internal leaked combustible gas in real time.

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