Energy storage battery pack based on smart grid

Abstract

The present invention relates to the technical field of energy storage battery packs, and discloses an energy storage battery pack based on a smart grid, which mainly includes a battery box, a sealing cover, a plurality of battery cells and a heat-insulating guide plate. The battery box is filled with a cooling medium for heat dissipation. A pressure relief prevention and control component is provided on the outside of the battery pack, and the component cooperates with the shaft screw through a spiral cylinder to achieve graded pressure relief and avoid instantaneous large-scale pressure relief. After the pressure relief is completed, the shaft screw and the spiral cylinder are automatically sealed to ensure that there is no gas backflow. The pressure relief prevention and control component adjusts the rotation rate by replacing different rotational motion damping to ensure the stability of the pressure relief process. The monitoring sensor monitors the rotation state of the shaft screw and the pressure relief process in real time. The present invention ensures the safety and reliability of the battery pack in a high-pressure and high-temperature environment through the design of graded pressure relief, automatic sealing, and intelligent monitoring, and is particularly suitable for large-scale storage systems in smart grids.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery packs, and in particular to an energy storage battery pack based on a smart grid. Background Art

[0002] With the rapid development of new energy technologies, backup battery packs are increasingly used in smart grids. Backup battery packs play a vital role in large-scale power regulation and backup power systems. However, during the operation of the backup battery pack, especially in the case of high energy density or abnormal charging and discharging, a large amount of heat and gas will be generated inside, which may cause thermal runaway of the battery, leading to serious safety problems. Therefore, when designing the pressure release and explosion safety of energy storage battery packs, the pressure relief valve, as a key safety component, is responsible for ensuring that the battery pack is released in time under overpressure and ensuring system safety.

[0003] Traditional battery pack pressure relief valves usually adopt a single quick pressure relief design. When the internal pressure of the battery pack is too high, the pressure relief valve opens quickly and releases a large amount of gas instantly. This design has some obvious defects:

[0004] Secondary effects of instantaneous pressure release: Traditional pressure relief valves open instantly when the pressure is extremely high, releasing a large amount of gas. Although this can prevent the battery pack from exploding, the instantaneous release of large amounts of gas often causes secondary risks such as equipment vibration and airflow impact, and even damages surrounding electrical equipment and cooling systems. In addition, the instantaneous release of large amounts of gas may also cause unstable pressure inside the battery pack, affecting its normal operation.

[0005] Lack of precise control of the pressure relief process: The design of traditional pressure relief valves lacks the ability to grade and control the pressure release process, and cannot gradually release the fire according to the actual pressure changes. Once the pressure relief valve is opened, the entire pressure relief process is out of control and cannot be adaptively adjusted according to the pressure conditions. This design not only reduces the safety of the system, but may also lead to unnecessary excessive pressure relief, wasting gas and energy inside the system.

[0006] Poor sealing, unable to automatically seal after pressure relief: Traditional pressure relief valves usually cannot automatically restore sealing after pressure is released, or the sealing effect is poor, which is prone to gas reflux or leakage again. This design defect may cause the battery pack to continue to have safety hazards after pressure relief, and manual intervention or replacement of the valve is required to relieve pressure before normal use can be restored.

[0007] Insufficient heat management and low heat dissipation efficiency: Battery packs generate a lot of heat under high load or abnormal operating conditions. Traditional pressure relief valve designs fail to take into account the management and removal of heat and cannot effectively handle overheating inside the battery pack. Pressure relief systems often lack an efficient heat removal mechanism, which makes the battery pack prone to thermal runaway in high temperature environments, exacerbating the risk of excessive pressure.

[0008] In summary, traditional battery pack pressure relief valves have defects such as secondary risks caused by instantaneous pressure relief, lack of precise control of the pressure relief process, poor sealing, and insufficient heat management. As the application scale of energy storage battery packs in smart grids continues to expand, these defects can no longer efficiently meet the needs of high-safety application scenarios, which requires a new type of pressure relief device that can achieve graded pressure relief, automatic sealing, precise control and heat management to improve the safety and security of energy storage systems. Summary of the invention

[0009] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0010] To this end, the present invention provides the following technical solutions:

[0011] An energy storage battery pack based on a smart grid comprises:

[0012] A battery pack, comprising a battery box, a sealing cover and a battery cell located inside the battery box, wherein the battery cell is arranged inside the battery box, and the sealing cover is connected to the top of the battery box to seal the battery box;

[0013] The pressure relief control component includes a pressure relief valve body, a damping control component, a monitoring sensor, a spiral cylinder and an axial screw, wherein the pressure relief valve body is connected to the outside of the battery box, the side of the pressure relief valve body is provided with a pressure relief pipe connected to the inside of the battery box, the upper end of the pressure relief valve body is provided with an exhaust hole, the spiral cylinder is fixedly installed inside the pressure relief valve body, the axial screw is rotatably sleeved inside the spiral cylinder, the damping control component is fixedly installed at the bottom end of the pressure relief valve body, the monitoring sensor is fixedly installed at the bottom end of the damping control component, and the monitoring sensor is used to monitor the rotation angle and rotation amount of the axial screw.

[0014] Preferably, a shaft is mounted at the bottom end of the shaft screw, a groove is provided in the damping control member, a spring sheet and a damping plate are installed in the groove, a grinding shoe is provided on the surface of the shaft screw, and one side of the damping plate is in sliding contact with the surface of the grinding shoe.

[0015] Preferably, a gap is left between the outer periphery of the battery cell and the inner wall of the battery box, and a cooling medium is added, and a heat insulating plate is arranged between two adjacent battery cells, and a thermal conductive pad is arranged on the surface of the heat insulating plate and is in contact with the surface of the battery cell.

[0016] Preferably, the heat-insulating conductive plate is made of bronze or ceramic material, and the heat-conducting pad is made of a heat-conducting silicone pad or a graphite sheet.

[0017] Preferably, the liquid level of the cooling medium is lower than the horizontal height of the pressure relief pipe port.

[0018] Preferably, the spiral cylinder is made of wear-resistant rubber or stainless steel, and is provided with a spiral cavity inside. The shaft screw is made of carbon steel or titanium alloy, and has a spiral structure on the surface for cooperating with the spiral cavity on the inner wall of the spiral cylinder.

[0019] Preferably, there are multiple abutment grooves in the damping control member and they are evenly distributed in the circumferential direction. The damping plate is pressed against the grinding shoe through the spring sheet. The damping plate is used to provide friction damping for the rotation of the shaft screw.

[0020] Preferably, the end of the monitoring sensor is electrically connected to a monitoring system of the battery pack, and the monitoring system receives data from the monitoring sensor to monitor the pressure relief status in real time.

[0021] Compared with the prior art, the above technical solution has at least the following advantages:

[0022] 1. In the present invention, the working principle of the screw pump is obtained through the combination of the shaft screw and the spiral barrel, and the graded and continuous pressure relief functions are realized. This design can gradually release gas according to the internal pressure, avoiding the secondary risks caused by the single rapid pressure relief of the traditional explosion-proof pressure relief valve, such as equipment damage or damage, and improving the safety and stability of the system.

[0023] 2. In the present invention, the automatic sealing effect is achieved through the close contact between the shaft screw and the spiral cylinder. After the pressure relief is completed, the shaft screw automatically maintains a sealed blocking state to ensure the sealing performance and system safety after the pressure relief. This sealing effect avoids the problem of gas backflow or re-discharge after the pressure relief, greatly improving the reliability of the pressure relief valve.

[0024] 3. In the present invention, the heat generated by the melting core can be effectively dissipated through the design of the heat insulating plate and the heat conductive pad, avoiding the risk of overheating of the battery pack. The efficient heat management system ensures that the battery pack can operate in a high energy density environment. This design is particularly suitable for energy storage applications in smart grid environments, significantly improving the safety and operating efficiency of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the overall structure of an energy storage battery pack provided by an embodiment of the present invention;

[0026] Figure 2A schematic diagram of the exploded structure of an energy storage battery pack provided by one embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the structure of a pressure relief control component provided by an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the cross-sectional structure of a pressure relief control component provided by one embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the structure of a spiral barrel and a shaft screw provided by an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the internal structure of a damping control component provided by an embodiment of the present invention.

[0031] Reference numerals:

[0032] 100, battery pack; 110, battery box; 120, sealing cover; 130, battery cell; 140, heat insulation plate; 141, thermal pad;

[0033] 200, pressure relief control component; 210, pressure relief valve body; 220, damping control component; 230, monitoring sensor; 240, spiral cylinder; 250, shaft screw; 211, pressure relief pipe; 212, exhaust hole; 251, shaft rod; 221, groove; 222, spring piece; 223, damping plate; 224, grinding shoe. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0035] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0036] A smart grid-based energy storage battery pack provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0037] Combination Figure 1-Figure 6 As shown, a smart grid-based energy storage battery pack and pressure-proof assembly of the present invention are described in detail. It should be understood that the following embodiments are only used to illustrate the present invention, rather than to limit the present invention.

[0038] The present invention provides an energy storage battery pack based on a smart grid, which mainly includes a battery pack 100 and a pressure relief prevention and control component 200. The structure and working principle of each part are described in detail below.

[0039] The battery pack 100 includes a battery box 110, a sealing cover 120, a plurality of battery cells 130, a heat insulating conductive plate 140 and a heat conductive pad 141. The plurality of battery cells 130 are arranged inside the battery box 110 and are arranged in a straight line along the inside of the battery box 110. A gap is left between the outer periphery of the battery cell 130 and the inner wall of the battery box 110. The gap is filled with a cooling medium for effective cooling. The sealing cover 120 is sealed and connected to the top of the battery box 110 to achieve the sealing of the battery pack and prevent the influence of the external environment on the battery cell.

[0040] A heat insulating plate 140 is provided between adjacent battery cells 130. The heat insulating plate 140 is made of bronze or ceramic material and has good thermal conductivity and heat insulation effect. The surface of the heat insulating plate 140 is bonded to the surface of the battery cell 130, and a heat conductive pad 141 is provided at the bonding point. The heat conductive pad 141 is made of a heat conductive silicone pad or a graphite sheet, and can quickly dissipate the heat generated by the battery cell 130 during operation to prevent the battery cell 130 from overheating.

[0041] The cooling medium filled in the battery box 110 is preferably water or cooling oil to ensure that the battery cell 130 maintains an appropriate temperature during operation. In particular, the liquid level of the coolant is lower than the level of the port of the pressure relief pipe 211 to ensure that when the internal pressure of the cooling group increases and the pressure is relieved, the coolant will not enter the damping control member 220 and affect its normal operation.

[0042] The pressure relief prevention and control assembly 200 is fixedly mounted on the outside of the battery pack 100 and is used to diffuse the excessive gas when the internal pressure of the battery pack 100 increases, thereby preventing the battery pack from being damaged or causing danger due to excessive pressure.

[0043] The pressure relief control assembly 200 includes a pressure relief valve body 210, a damping control member 220, a monitoring sensor 230, a spiral cylinder 240 and an axis screw 250. The pressure relief valve body 210 is connected to the outside of the battery box 110, and a pressure relief pipe 211 is provided on the side of the pressure relief valve body 210. The pressure relief pipe 211 is connected to the inside of the battery box 110, and an exhaust hole 212 is provided at the upper end of the pressure relief valve body 210. When the internal pressure of the battery pack rises to a set value, the gas enters the interior of the pressure relief control assembly 200 through the pressure relief pipe 211.

[0044] The key components of the pressure relief control assembly 200 are the spiral cylinder 240 and the shaft screw 250. The spiral cylinder 240 is fixedly installed inside the pressure relief valve body 210, and a spiral cavity is provided inside the spiral cylinder 240. The surface of the shaft screw 250 has a spiral structure, and cooperates with the spiral cavity inside the spiral cylinder 240. When the shaft screw 250 rotates, a closed gas pressure relief channel is formed inside the spiral cylinder 240.

[0045] When the internal pressure of the battery pack 100 exceeds the set safety value, the gas is guided into the pressure relief prevention and control assembly and gradually activated by the rotation of the shaft screw 250. This structure forms a graded pressure relief mechanism, avoiding the secondary risks caused by the instantaneous release of a large amount of gas, and ensuring the stability and safety of the pressure relief process.

[0046] After the pressure relief is completed, the close fit between the spiral cylinder 240 and the shaft screw 250 can achieve automatic sealing, ensuring the sealing effect after the pressure relief. The shaft screw 250 can effectively prevent the gas from flowing back after the pressure relief through the abutment force formed by its rotation, thereby ensuring that the system is in a sealed state after the pressure relief, improving safety and reliability.

[0047] The damping control member 220 is installed at the bottom of the pressure relief valve body 210, and a groove 221 is provided inside the damping control member 220, and a spring piece 222 and a damping plate 223 are installed inside the groove 221. A grinding shoe 224 is provided on the surface of the shaft 251, and one side of the damping plate 223 is in sliding contact with the surface of the grinding shoe 224. There are multiple grooves 221 in the damping control member 220, and they are evenly distributed in the circumferential direction. The damping plate 223 is pressed against the grinding shoe 224 through the spring piece 222, and the damping plate 223 is used to provide friction damping for the rotation of the shaft screw 250. The rotation speed of the shaft screw 250 can be adjusted by the friction between the damping plate 223 and the grinding shoe 224. The damping control member 220 ensures the stability during the pressure relief process, and avoids the problem of uneven pressure relief or uncontrolled pressure relief due to excessive rotation speed.

[0048] The pressure relief control assembly 200 is equipped with a monitoring sensor 230, which is mainly used to monitor the rotation angle and rotation amount of the shaft screw 250. The monitoring sensor can accurately record the rotation of the shaft screw 250 during the pressure relief process, which helps to monitor the exhaust volume during the pressure relief control process in real time and ensure the safety of the pressure relief process.

[0049] The end of the monitoring sensor 230 is electrically connected to the monitoring system of the battery pack 100. The monitoring system receives data from the monitoring sensor 230 and monitors the pressure relief status in real time. The monitoring sensor 230 monitors the actual pressure changes inside the battery pack 100, reports the pressure changes to the monitoring system in real time, and determines whether further pressure relief is needed. If abnormal pressure or abnormal pressure relief status is found, the monitoring system will automatically send an alarm signal to prompt the user to take timely countermeasures. The intelligent monitoring system can not only monitor the current pressure relief situation in real time, but also analyze the operating status of the battery pack 100 through historical data, predict possible abnormal conditions in the future, and make preventive adjustments in advance. In this way, appropriate pressure relief measures can be initiated before the pressure exceeds the critical value, thereby avoiding the occurrence of emergencies.

[0050] For another example, the energy storage battery pack of the present invention can be used in a large-scale energy storage system. The pressure relief control component 200 of the battery pack is installed in a dispersed manner at multiple points to cope with the linkage control of multiple pressure relief control components 200 in a large-scale energy storage system power station through a monitoring system, ensuring that when the pressure in different parts of the battery pack 100 is uneven, graded pressure relief can be achieved independently according to their respective monitoring results, effectively avoiding excessive burden on a single pressure relief control point.

[0051] In this case, the spiral cylinder 240 and the shaft screw 250 in the pressure relief control component 200 can be made of titanium alloy materials with stronger high pressure resistance and corrosion resistance, so as to further enhance the safety and reliability of the system under extreme conditions.

[0052] In some embodiments, the energy storage battery pack is further optimized for high-voltage environments, with a focus on the application of high-temperature resistant and wear-resistant materials to ensure that the system can still operate stably under extreme conditions.

[0053] 1. Material optimization of the damping control member 220

[0054] In order to ensure the long-term stability of the pressure relief control component 200 under high pressure and extreme temperature environments, the present invention introduces the following materials into the structure of the pressure relief control component 200:

[0055] The spiral cylinder 240 is made of wear-resistant rubber or titanium alloy material to ensure efficient sealing and durability during long-term operation and repeated pressure relief operations;

[0056] The shaft screw 250 is made of carbon steel or stainless steel, has high strength and corrosion resistance, and can withstand multiple high-pressure pressure relief operations without being easily worn.

[0057] 2. Optimized performance advantages

[0058] High temperature and high pressure resistance: The titanium alloy and stainless steel materials used in the present invention can not only withstand extreme high temperature environments, but also maintain structural defects under high pressure environments, and are suitable for long-term high-load coordination scenarios, such as new energy reserves and reserve industrial equipment.

[0059] Reduce friction and wear: By selecting high-strength wear-resistant materials, the friction and wear between the spiral barrel and the shaft screw during the pressure relief process is effectively reduced, the service life of the pressure relief control components is extended, and the equipment maintenance cost is reduced.

[0060] In some complex working conditions, the internal pressure of the energy storage battery pack may be unevenly distributed due to the operation of different cells. In order to adapt to such complex situations, the present invention designs a multi-stage pressure relief regulation system, through the replaceable adjustment function of the pressure relief control component, different pressure relief damping is selected according to different pressure environments, and the pressure relief speed and rotation rate are adjusted.

[0061] Pressure relief in stages: When the pressure in a local area inside the battery pack changes, the pressure relief control component 200 can monitor the pressure changes in different areas in real time through the monitoring sensor 230, and perform pressure relief in the high-pressure area in stages to ensure that there is no instantaneous large-scale gas discharge.

[0062] Adaptive adjustment of pressure relief rate: According to the pressure conditions in the area, the shaft screw 250 and the spiral cylinder 240 can adjust the rotational damping by replacing the elasticity of the spring 222, thereby achieving flexible graded pressure relief, avoiding unnecessary excessive pressure relief, and ensuring balanced and stable system pressure.

[0063] The working principle and use process of the present invention:

[0064] 1. Working Principle

[0065] The working principle of the present invention is based on four key steps: pressure monitoring, graded pressure relief, automatic sealing and heat management, to ensure that the energy storage battery pack can safely relieve pressure and resume normal operation under abnormal or high pressure conditions.

[0066] 1. Pressure monitoring

[0067] During the operation of the energy storage battery pack, the battery cells 130 generate heat and gas due to charging and discharging, causing the pressure inside the battery pack to rise. The monitoring sensor 230 monitors the pressure state inside the battery pack 100 in real time and is electrically connected to the intelligent monitoring system, which records and feeds back the working data of the battery pack 100.

[0068] When the internal pressure of the battery pack 100 exceeds a set safety threshold, the monitoring sensor 230 will detect the abnormal pressure change and trigger the pressure relief protection mechanism.

[0069] 2. Grading and continuous pressure relief

[0070] When the internal pressure of the battery pack 100 exceeds the standard, the gas enters the pressure relief valve body 210 through the pressure relief pipe 211. At this time, the shaft screw 250 is combined with the spiral cylinder 240 to achieve graded pressure relief of the gas through rotation.

[0071] Principle of graded pressure relief: Gas is introduced from the battery pack 100 into the pressure relief valve body 210, and the gas drives the shaft screw 250 to rotate inside the spiral cylinder 240, releasing the high-pressure gas into the external environment in stages. During this process, the rotation speed of the shaft screw 250 is automatically adjusted according to the instantaneous pressure to ensure that the gas is not released in large quantities, thereby preventing the equipment from being impacted or damaged.

[0072] The structure's graded pressure relief design can gradually relieve internal pressure and prevent system failure due to excessive pressure relief.

[0073] 3. Automatic sealing and recovery

[0074] When the internal pressure returns to a safe level, the pressure relief process ends. The tight engagement between the shaft screw 250 and the spiral cylinder 240 achieves an automatic sealing effect.

[0075] After the pressure relief is completed, if the air pressure is not enough to drive the shaft screw 250 to rotate, it stops rotating and the pressure relief channel is automatically closed to ensure that there will be no gas backflow or re-exhaust problems. This automatic sealing design can ensure that the battery pack 100 maintains good sealing after the pressure relief, avoiding gas backflow or re-exhaust problems.

[0076] 4. Efficient heat management

[0077] During the battery operation, the heat insulating plate 140 and the heat conducting pad 141 conduct heat generated by the battery cell 130. The cooling medium is filled in the battery box 110 and continuously circulates to cool the battery cell 130 to prevent the battery pack 100 from overheating.

[0078] Automatic control: In combination with the monitoring system, the cooling system can automatically adjust the coolant flow rate according to the temperature of the battery cell 130 to ensure that the battery pack 100 does not suffer thermal runaway due to overheating when working under high load.

[0079] 2. Usage Process

[0080] To ensure that the energy storage battery pack can operate long-term, stably and safely in smart grid applications, the following usage process can be followed. The process includes four stages: system installation, startup operation, maintenance monitoring and emergency response, ensuring that the system can operate stably under different working conditions.

[0081] 1. System Installation

[0082] Install the battery: correctly install the battery pack 100 in the energy storage system, ensure that the battery cell 130 fits tightly with the heat insulation plate 140 , and fill the battery box 110 with cooling medium.

[0083] Install the pressure relief control assembly: Fix the pressure relief control assembly 200 to the outside of the battery pack, and ensure that the pressure relief pipe 211 is connected to the inside of the battery box 110. Install the damping control member 220 and the monitoring sensor 230, and ensure that the monitoring sensor 230 is electrically connected to the monitoring system.

[0084] 2. Start operation

[0085] Start the battery pack: Connect the battery pack 100 to the smart grid and start the system to perform normal charging and discharging operations. During this process, the battery cells 130 will generate a certain amount of heat and gas, and the monitoring system will monitor the working status of the battery pack 100 in real time.

[0086] Monitoring system parameters: The monitoring system collects the pressure, temperature and pressure relief status inside the battery pack 100 in real time through the monitoring sensor 230. If the internal pressure of the system is normal, the pressure relief prevention and control component 200 remains sealed, and the battery pack 100 works in a normal working state.

[0087] 3. Monitoring and maintenance

[0088] Real-time monitoring of pressure and temperature: During system operation, the monitoring sensor 230 will continuously monitor the pressure and temperature data inside the battery pack 100. Users can view these parameters in real time through the remote monitoring system.

[0089] Automatically adjust the cooling system: If the internal temperature of the battery pack 100 rises, the cooling system will automatically increase the circulation speed of the coolant to ensure that the temperature of the system remains within a safe range.

[0090] 4. Emergency treatment and pressure relief

[0091] Triggering the pressure relief mechanism: When the internal pressure of the system exceeds the preset threshold, the monitoring sensor 230 detects an abnormal signal and notifies the monitoring system. At this time, the pressure relief control component 200 is activated, and the gas enters the pressure relief valve body 210 through the pressure relief pipe 211, and the air pressure drives the shaft screw 250 to rotate inside the spiral cylinder 240 to perform graded pressure relief.

[0092] Pressure relief process monitoring: During the pressure relief process, the monitoring system will monitor the pressure relief progress, the rotation state of the shaft screw and the amount of gas released in real time. If the pressure relief process goes smoothly, the pressure will gradually drop to a safe record level.

[0093] Automatic sealing and system recovery: After the pressure is released, the spiral cylinder 240 and the shaft screw 250 are automatically sealed, the pressure relief channel is blocked, and the system returns to a sealed state. The monitoring system will re-detect the internal pressure, and after it returns to normal, the battery pack continues to work.

[0094] 5. Fault alarm and maintenance

[0095] Fault detection: During the pressure relief process or system operation, if the monitoring system detects that the monitoring sensor 230 feedbacks abnormal data such as continuous pressure relief or continuous pressure increase, the system will automatically issue an alarm to prompt the user to take emergency measures.

[0096] Manual maintenance and inspection: After the system alarm, the user should promptly check the pressure release and internal faults of the battery pack 100, and restart the system after eliminating the abnormalities.

[0097] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0098] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An energy storage battery pack based on a smart grid, characterized in that: include: A battery pack (100) comprising a battery box (110), a sealing cover (120) and a battery cell (130) located inside the battery box (110), wherein the battery cell (130) is located inside the battery box (110), and the sealing cover (120) is connected to the top of the battery box (110) and is used to seal the battery box (110); A pressure relief control component (200) comprises a pressure relief valve body (210), a damping control member (220), a monitoring sensor (230), a spiral cylinder (240) and a shaft screw (250), wherein the pressure relief valve body (210) is connected to the outside of the battery box (110), a side portion of the pressure relief valve body (210) is provided with a pressure relief pipe (211) that is in communication with the inside of the battery box (110), an upper end of the pressure relief valve body (210) is provided with an exhaust hole (212), and the spiral cylinder (240) is fixedly installed. Inside the pressure relief valve body (210), the shaft screw (250) is rotatably sleeved inside the spiral cylinder (240), the shaft screw (250) and the spiral cylinder (240) are in tight contact, the damping control component (220) is fixedly mounted on the bottom end of the pressure relief valve body (210), the monitoring sensor (230) is fixedly mounted on the bottom end of the damping control component (220), and the monitoring sensor (230) is used to monitor the rotation angle and rotation amount of the shaft screw (250); A shaft (251) is provided at the bottom end of the shaft screw (250), a groove (221) is provided in the damping control member (220), a spring piece (222) and a damping plate (223) are installed in the groove (221), a grinding shoe (224) is provided on the surface of the shaft (251), and one side of the damping plate (223) is in sliding contact with the surface of the grinding shoe (224).

2. The energy storage battery pack based on smart grid according to claim 1, characterized in that: A gap is left between the outer periphery of the battery cell (130) and the inner wall of the battery box (110), and a cooling medium is added thereto. A heat insulating conductive plate (140) is provided between two adjacent battery cells (130), and a heat conductive pad (141) is provided on the surface of the heat insulating conductive plate (140) and is in contact with the surface of the battery cell (130).

3. The energy storage battery pack based on smart grid according to claim 2, characterized in that: The heat-insulating conductive plate (140) is made of bronze or ceramic material, and the heat-conducting pad (141) is made of a heat-conducting silicone pad or a graphite sheet.

4. The energy storage battery pack based on smart grid according to claim 2, characterized in that: The liquid level of the cooling medium is lower than the horizontal height of the port of the pressure relief pipe (211).

5. The energy storage battery pack based on smart grid according to claim 1, characterized in that: The spiral cylinder (240) is made of wear-resistant rubber or stainless steel and is provided with a spiral cavity therein; the shaft screw (250) is made of carbon steel or titanium alloy and has a spiral structure on its surface, and is used to cooperate with the spiral cavity on the inner wall of the spiral cylinder (240).

6. The energy storage battery pack based on smart grid according to claim 1, characterized in that: The number of the abutting grooves (221) in the damping control member (220) is multiple and evenly distributed in the circumferential direction; the damping plate (223) is pressed against the grinding shoe (224) via the spring sheet (222); the damping plate (223) is used to provide friction damping for the rotation of the shaft screw (250).

7. An energy storage battery pack based on a smart grid according to any one of claims 1 to 6, characterized in that: The end of the monitoring sensor (230) is electrically connected to a monitoring system of a battery pack, and the monitoring system receives data from the monitoring sensor (230) to monitor the pressure relief state in real time.

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