A box-type energy storage battery system

Abstract

The application discloses a box type energy storage battery system and relates to the technical field of battery pack cooling, which comprises a water cooling system and further comprises a protection frame, a liquid cooling assembly, a battery cell, an overhead plate, a fixed fence, an air cooling assembly and a plugging assembly. The liquid cooling assembly comprises a positive electrode side and a negative electrode side. The battery cell is cooled by the liquid cooling assembly. Ventilation holes are reserved between the positive electrode side, the negative electrode side and the battery cell. The air cooling assembly and the fixed fence are used for guiding airflow into the ventilation holes. The air cooling assembly comprises a monitoring part used for monitoring the gas flow. The plugging assembly comprises a plurality of detection parts and a plugging plate. The plugging plate can plug the corresponding ventilation hole. The monitoring part monitors the change of the gas flow entering the fixed fence. The above components are arranged, the purpose of cooling the two ends of the positive and negative electrodes of the battery cell is effectively achieved, the function of detecting the bulging of the battery cell is increased, and the purpose of quickly extinguishing the single battery system in time is achieved.

Description

Technical Field

[0001] This invention relates to the field of battery pack cooling technology, and in particular to a box-type energy storage battery system. Background Technology

[0002] With the rapid development of the new energy industry, box-type energy storage battery systems are widely used in grid peak shaving and renewable energy storage due to their modularity and high energy density. However, the heat generation of the battery cells during high-power charging and discharging has become a core bottleneck restricting the safety and lifespan of the system, especially in the application of high-energy-density lithium-ion batteries. The uneven heat dissipation of the positive and negative electrodes often leads to thermal management failure, and the delayed thermal runaway fire extinguishing mechanism causes secondary damage. Such problems seriously affect the safety of equipment operation.

[0003] For example, in the energy storage battery pack and energy storage system with application number 202410354804.5, the energy storage battery pack includes a liquid cooling plate structure; a battery module is disposed on the liquid cooling plate structure, including multiple cells connected in series and arranged sequentially; a heat sink structure is disposed on at least one side of the battery module, including a plate body and a heat sink assembly, a plurality of heat sinks are spaced apart on one side of the plate body, and the heat sink assembly is disposed on the other side of the plate body opposite to the heat sinks, and each heat sink is inserted between adjacent cells and in contact with the cells on both sides.

[0004] The above-mentioned technical solutions have some problems during use. The heat dissipation through the fan can easily lead to the heat not being able to move away from the battery pack. During long-term use, the temperature around the battery pack will rise, and the heat dissipation efficiency of the battery pack will decrease. In addition, the above-mentioned application and traditional box-type energy storage systems cannot achieve the purpose of heat dissipation at different positions of the positive and negative terminals of the battery cells. During the charging and discharging process, the positive and negative terminals of the battery cells generate heat at different times, and traditional heat dissipation methods cannot adaptively adjust according to the heat generation of the battery cells. The parameter data of battery cells of different brands or batches will have deviations, and the battery pack cannot adjust the heat dissipation efficiency accordingly. Furthermore, traditional batteries will bulge after a long time, requiring timely inspection and replacement of the battery cells. However, the battery cells are generally inside the battery pack, and it is not possible to directly observe whether they are bulging.

[0005] Therefore, it is necessary to invent a box-type energy storage battery system to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a box-type energy storage battery system to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a box-type energy storage battery system, including a water-cooling system for cooling water circulation and temperature reduction, and further including: a protective frame with an open top and one side; multiple sets of liquid-cooling components housed within the protective frame, the liquid-cooling components including a positive electrode side and a negative electrode side, both of which are fin-shaped hollow structures symmetrically arranged, and both the positive and negative electrode sides are connected to the water-cooling system; multiple battery cells, respectively placed between the positive and negative electrode sides, with the positive terminal of the battery cell in contact with the positive electrode side and the negative terminal of the battery cell in contact with the negative electrode side, cooling the battery cells through the positive and negative electrode sides; and a space reserved between the positive electrode side, the negative electrode side, and the battery cells. Ventilation holes; an overhead plate, detachably mounted inside the protective frame and positioned at the bottom of the battery cell and liquid cooling assembly, with a gap between the lower end of the overhead plate and the protective frame, and communicating with the ventilation holes; a fixed fence, fitted onto the upper end of multiple liquid cooling assemblies, used to guide airflow into the ventilation holes; an air-cooling assembly, detachably mounted on one side of the fixed fence, used to input gas into the fixed fence, the air-cooling assembly including a monitoring unit for monitoring the gas flow rate entering the fixed fence; and a sealing assembly, the same number and corresponding to the liquid cooling assemblies, the sealing assembly including multiple detection units and sealing plates, each detection unit being placed in a corresponding ventilation hole, the sealing plate capable of blocking all ventilation holes of the corresponding liquid cooling assembly.

[0008] Preferably, the detection unit includes a rhomboid elastic sheet and a connector. One end of the connector is fixedly connected to the sealing plate, and the other end is connected to the end of the rhomboid elastic sheet that extends after being compressed. The expansion of the battery cell compresses the corresponding rhomboid elastic sheet, and the connector causes the sealing plate to block the ventilation hole. The monitoring unit monitors the change in gas flow rate entering the fixed enclosure.

[0009] Preferably, the liquid cooling assembly further includes: an inlet pipe, which is connected to one end of the positive electrode side and one end of the negative electrode side, and is also connected to the outlet end of the water cooling system, for inputting low-temperature cooling water into the positive electrode side and the negative electrode side; a positive electrode outlet pipe, which is connected to the end of the positive electrode side away from the inlet pipe; a negative electrode outlet pipe, which is connected to the end of the negative electrode side away from the inlet pipe; a regulating valve, which is respectively connected to the ends of the positive electrode outlet pipe and the negative electrode outlet pipe, for controlling the flow rate of the positive electrode outlet pipe and the negative electrode outlet pipe; a temperature sensor, which is respectively fixedly connected inside the positive electrode outlet pipe and the negative electrode outlet pipe, for monitoring the temperature inside the positive electrode outlet pipe and the negative electrode outlet pipe, and controlling the flow rate of the positive electrode outlet pipe and the negative electrode outlet pipe through the regulating valve; the output end of the regulating valve is connected to the same output pipe, which is connected to the return water end of the water cooling system, for returning the cooled water after heat exchange to the water cooling system for cooling.

[0010] Preferably, a partition is fixedly connected to the middle of both the positive and negative electrode sides to guide the cooling water flow into the fin-shaped position; the ends of the fin-shaped positions on both the positive and negative electrode sides are made of flexible material.

[0011] Preferably, the sealing assembly further includes: a support frame, which is installed on the inner side of the fixed fence, and a plurality of guide rings are fixedly connected to its lower end, with the middle part of the connector passing through the corresponding guide ring; a mounting frame, with a plurality of extension rods fixedly connected to its lower end, the upper end of each of the diamond-shaped elastic pieces being fixedly connected to the corresponding extension rod, and the extension rod passing through the support frame; the mounting frame is fixed relative to the support frame.

[0012] Preferably, it further includes: a panel, which is detachably installed on one side of the opening of the protective frame, and the output pipe and the inlet pipe both pass through the panel; heat dissipation holes, which are opened in the middle of the panel and there are multiple holes, and the heat dissipation holes correspond to the gap between the overhead plate and the protective frame; a top plate, which is detachably installed at the opening position at the upper end of the protective frame, and the lower end face is attached to the top of the fixed fence; the protective frame, the panel and the top plate are combined to form an energy storage cavity.

[0013] Preferably, the air-cooling assembly further includes: an air inlet duct, the input end of which penetrates the panel and is detachably connected to the panel and top plate, the air inlet duct corresponding to and communicating with the fixed fence; a fire-fighting pipe, which is fixedly connected to the inside of the panel, with the input end penetrating the panel and multiple output ends evenly distributed inside the air inlet duct, for spraying fire-extinguishing materials into the fixed fence; a pressure pipe, which is fixedly connected to the inside of the panel and its upper end communicates with the fire-fighting pipe, and a baffle rubber ring is fixedly connected to the inside of the pressure pipe; a push rod, which is slidably connected to the inside of the pressure pipe and its upper end is positioned above the baffle rubber ring; and a sealing plate, which is slidably connected to the inside of the panel and fixedly connected to the push rod, for blocking some of the heat dissipation holes.

[0014] Preferably, the sealing plate is slidably connected to the overhead plate; a limiting hole is provided on one side of the sealing plate, and a rubber boss is fixedly connected to the overhead plate at the position corresponding to the limiting hole; when the rubber boss is placed in the limiting hole, the sealing plate does not block the ventilation hole; an elastic element is fixedly connected to one end of the sealing plate for pushing the sealing plate to move.

[0015] Preferably, it further includes: a reset rod, which is slidably connected to the lower end of the overhead plate, and a reset boss is fixedly connected to the middle of each sealing plate; a reset groove is opened in the middle of the sealing plate; the reset boss is placed in the reset groove; a driving part is fixedly connected to one side of the overhead plate, and the output end is fixedly connected to the reset rod, for driving the reset rod to slide relative to the overhead plate; the reset rod makes the rubber boss correspond to the limiting hole through the reset groove.

[0016] Preferably, it also includes: a liner plate, which is placed between the side of the cell and the positive and negative sides respectively.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. This invention effectively achieves the purpose of cooling both ends of the positive and negative electrodes of the battery cell by setting up a water cooling system, liquid cooling components, ventilation holes, fixed enclosure, and air cooling components. In use, the water cooling system injects cooling water into the positive / negative electrode side through the liquid inlet pipe. The cooling water flows in the positive / negative electrode side and exchanges heat with both ends of the battery cell to cool both ends of the battery cell. After heat exchange, the temperature of the cooling water rises and flows back to the water cooling system through the positive / negative electrode outlet pipe. At the same time, the air cooling component injects air into the fixed enclosure and enters the lower end of the battery cell through the ventilation holes, so that the temperature on both sides of the energy storage cavity is balanced, avoiding high temperature difference between the upper and lower ends of the battery cell and improving the safety of the energy storage system.

[0019] 2. This invention achieves the purpose of detecting battery cell bulging by setting up ventilation holes, fixed fences, air-cooling components, and sealing components. In use, a diamond-shaped elastic sheet is installed between two battery cells. When a battery cell expands, it squeezes the corresponding diamond-shaped elastic sheet, causing it to pull the corresponding connector. At the same time, the other end of the connector pulls the sealing plate to slide, causing the limiting hole to separate from the rubber boss. Then, the elastic piece pushes the sealing plate to block the corresponding ventilation hole. When the air flow rate decreases significantly and continues to be supplied with gas at a low flow rate, it indicates that some battery cells inside have bulged and need to be repaired in time, thus improving the safety of battery cell use and achieving the purpose of timely detection of battery cell bulging.

[0020] 3. By incorporating a liquid cooling component, this invention adds a function of adaptive heat dissipation based on temperature. During use, a temperature sensor detects the temperature inside the positive / negative outlet pipe. When the temperature exceeds the preset maximum value, the regulating valve increases the cooling water flow rate of the corresponding positive / negative outlet pipe, accelerating heat exchange between the battery cell and the cooling water and improving cooling efficiency. Conversely, the cooling water flow rate decreases. By dynamically adjusting the cooling water flow rate based on changes in battery cell temperature, the battery cell temperature can be kept within an appropriate range, improving the stability of the energy storage system.

[0021] 4. This invention, by incorporating air-cooling components and heat dissipation holes, effectively achieves the goal of rapid fire suppression for individual battery systems. When a battery cell spontaneously combusts, the controller activates the fire suppression system, which rapidly delivers extinguishing agents to the fire pipe and then to the fixed enclosure via the output end. This cools and extinguishes the top of the battery cell, reducing the impact of spontaneous combustion on other equipment. Simultaneously, some extinguishing agents can enter the lower part of the battery cell and the energy storage cavity through the ventilation holes, achieving rapid and targeted fire suppression. Furthermore, the increased pressure within the fire pipe increases the pressure on the upper end of the push rod within the pressure pipe, causing the push rod to slide downwards past the partition ring. At the same time, the sealing plate slides downwards synchronously, blocking some of the heat dissipation holes, reducing extinguishing agent leakage, and accelerating the fire suppression speed. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of the protective frame in this invention.

[0024] Figure 3 This is a schematic diagram of the liquid cooling component in this invention.

[0025] Figure 4 This is a schematic diagram of the internal flow channels on the positive / negative electrode side in this invention.

[0026] Figure 5 This is a schematic diagram of the bottom structure of the overhead panel in this invention.

[0027] Figure 6 In this invention Figure 5 A magnified view of a portion of region A.

[0028] Figure 7 This is a schematic diagram of the air-cooled component in this invention.

[0029] Figure 8 This is a schematic diagram of the pressure tube in this invention.

[0030] Figure 9 This is a schematic diagram showing the positional relationship between the air-cooling component and the sealing component in this invention.

[0031] Figure 10 In this invention Figure 9 A magnified view of a portion of region B.

[0032] Figure 11 This is a schematic diagram showing the positional relationship between the limiting hole and the rubber boss in this invention.

[0033] Figure 12 This is a schematic diagram of the structure of the sealing plate in this invention.

[0034] Figure 13 This is a schematic diagram showing the position of the partition in this invention.

[0035] In the diagram: 2. Protective frame; 3. Liquid cooling assembly; 301. Positive electrode side; 302. Negative electrode side; 303. Liquid inlet pipe; 304. Positive electrode liquid outlet pipe; 305. Negative electrode liquid outlet pipe; 306. Regulating valve; 307. Temperature sensor; 308. Output pipe; 309. Partition plate; 4. Battery cell; 5. Ventilation hole; 6. Overhead plate; 7. Fixed fence; 8. Air cooling assembly; 801. Monitoring unit; 802. Air inlet duct; 803. Fire suppression pipe; 804. Pressure pipe; 805. Partition rubber ring; 806. Pusher 807. Rod; 901. Sealing plate; 10. Sealing assembly; 11. Detection unit; 12. Diamond-shaped elastic sheet; 13. Connector; 14. Sealing plate; 15. Support frame; 16. Guide ring; 17. Mounting bracket; 18. Extension rod; 19. Limiting hole; 10. Rubber boss; 10. Elastic element; 11. Panel; 12. Heat dissipation hole; 13. Top plate; 14. Reset rod; 15. Reset boss; 16. Reset groove; 17. Drive unit; 18. Connecting terminal; 19. Liner plate. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: The present invention provides as follows Figures 1 to 12The box-type energy storage battery system shown includes a water-cooling system for cooling water circulation and cooling. The water-cooling system can employ equipment such as a cooling water circulator to cool and circulate the cooling water; this is existing technology. It also includes a protective frame 2, which is open at the top and one side. The protective frame 2 is a sheet metal structure with handles at both ends for easy handling. Multiple liquid-cooling components 3 are arranged within the protective frame 2 and are distributed in a straight line. Each liquid-cooling component 3 includes a positive electrode side 301 and a negative electrode side 302. Both the positive electrode side 301 and the negative electrode side 302 are fin-shaped hollow structures and are symmetrically arranged. A partition 309 is fixedly connected to the middle of both the positive electrode side 301 and the negative electrode side 302 to guide the cooling water flow into the fin-shaped... The battery cells are positioned such that cooling water can contact the battery cells 4, improving heat exchange efficiency. The inlet pipe 303 connects to one end of the positive electrode side 301 and the negative electrode side 302, and also connects to the outlet of the water cooling system. It is used to input low-temperature cooling water into the positive electrode side 301 and the negative electrode side 302. The inlet pipe 303 is fixedly connected to the positive electrode side 301 and the negative electrode side 302. Multiple battery cells 4 are arranged between the positive electrode side 301 and the negative electrode side 302. The positive terminal of the battery cell 4 contacts the positive electrode side 301, and the negative terminal of the battery cell 4 contacts the negative electrode side 302. The battery cells 4 use cubic cells, ensuring that the positive and negative terminals are in contact with the positive electrode side 301 and the negative electrode side 302 respectively. Cooling water flows through the positive electrode side 301 and the negative electrode side 302, allowing it to contact the positive and negative terminals of the battery cells 4. Heat exchange occurs at both ends of the electrode. Multiple battery cells 4 are electrically connected in series or parallel, and a wire is connected between every two battery cells 4 to the controller for monitoring battery cell 4 data. The electrical connection method of the battery cells 4 is existing technology and will not be described in detail here. The wires and controller are not shown in the figure. The battery cells 4 are cooled through the positive electrode side 301 and the negative electrode side 302. The liner 18 is placed between the side of the battery cell 4 and the positive electrode side 301 / negative electrode side 302. The liner 18 can protect the side wall of the battery cell 4 to prevent scratches during installation and reduce the shaking of the battery cell 4 during equipment handling. The liner 18 uses thermally conductive material so that it does not affect the heat exchange between the battery cell 4 and the liquid cooling component 3. The positive electrode outlet pipe 304, its The positive electrode side 301 is connected to the end away from the inlet pipe 303 and is fixedly connected to the positive electrode side 301; the negative electrode outlet pipe 305 is connected to the end away from the inlet pipe 303 on the negative electrode side 302 and is fixedly connected to the negative electrode side 302; the regulating valve 306 is connected to the ends of the positive electrode outlet pipe 304 and the negative electrode outlet pipe 305 respectively, and is used to control the flow of the positive electrode outlet pipe 304 and the negative electrode outlet pipe 305. The regulating valve 306 is electrically driven and is electrically connected to a corresponding power supply and controller during use. The flow of the positive electrode outlet pipe 304 / negative electrode outlet pipe 305 is limited by electrical control. The regulating valve 306 is fixedly connected to the positive electrode outlet pipe 304 / negative electrode outlet pipe 305. The electrically controlled regulating valve 306 is prior art and will not be described in detail here.Temperature sensors 307 are fixedly connected to the positive outlet pipe 304 and the negative outlet pipe 305, respectively. The temperature sensors 307 monitor the temperature within the positive and negative outlet pipes 304 and 305, and the flow rate within the positive and negative outlet pipes 304 and 305 is controlled by regulating valves 306. Temperature sensors 307 are existing technology and will not be described in detail here. In use, they are electrically connected to a corresponding controller and power supply.

[0038] It should be noted that during use, the temperature sensor 307 detects the temperature inside the positive electrode outlet pipe 304 / negative electrode outlet pipe 305. When the temperature exceeds the preset maximum value, it indicates that the temperature of the positive / negative electrode of the battery cell 4 has risen. At this time, the regulating valve 306 increases the cooling water flow rate of the corresponding positive electrode outlet pipe 304 / negative electrode outlet pipe 305 to accelerate the heat exchange between the battery cell 4 and the cooling water and improve the cooling efficiency. Similarly, when the temperature inside the positive electrode outlet pipe 304 / negative electrode outlet pipe 305 is detected to be lower than the preset minimum value, the regulating valve 306 reduces the cooling water flow rate of the positive electrode outlet pipe 304 / negative electrode outlet pipe 305 to reduce the heat exchange between the battery cell 4 and the cooling water, reduce the cooling efficiency, and prevent the battery cell 4 from being damaged due to excessively low temperature.

[0039] Specifically, ventilation holes 5 are reserved between the positive electrode side 301, the negative electrode side 302 and the battery cell 4 to allow airflow to connect the upper and lower ends of the battery cell 4, optimizing the cooling effect; it also includes an overhead plate 6, which is detachably installed inside the protective frame 2 and placed at the bottom of the battery cell 4 and the liquid cooling assembly 3. The two ends of the overhead plate 6 are bolted to the inside of the protective frame 2, and the bottom of the overhead plate 6 has multiple fin-shaped plates for support. There is a gap between the lower end of the overhead plate 6 and the protective frame 2, which is connected to the ventilation holes 5. During use, airflow enters the gap at the lower end of the battery cell 4 from the upper end through the ventilation holes 5, optimizing the cooling effect of the battery cell 4; a fixed fence 7 is fitted around multiple liquid cooling assemblies. The upper end of component 3 is used to guide airflow into ventilation hole 5; the air-cooling component 8 is detachably installed on one side of fixed fence 7 for inputting gas into fixed fence 7. The side of fixed fence 7 corresponding to air-cooling component 8 is open, allowing gas to enter fixed fence 7 through air-cooling component 8. Air-cooling component 8 is inserted into the opening of fixed fence 7. Air-cooling component 8 includes monitoring unit 801 for monitoring the gas flow rate entering fixed fence 7. Monitoring unit 801 can be a gas flow sensor or other component that can detect gas flow rate / velocity. Gas flow sensor is existing technology and will not be described in detail here. In use, gas flow sensor is electrically connected to a corresponding controller and power supply.

[0040] More specifically, the output end of the regulating valve 306 is connected to the same output pipe 308, which is connected to the return water end of the water cooling system. This is used to return the cooling water after heat exchange to the water cooling system for cooling. It should be noted that both the output pipe 308 and the inlet pipe 303 are connected to the water cooling system through pipe connectors or quick-connect pipes, and their sealing is ensured.

[0041] Specifically, it also includes a sealing component 9, which is the same number as and corresponds one-to-one with the liquid cooling component 3. The sealing component 9 includes multiple detection parts 901 and sealing plates 902. Each detection part 901 is placed in a corresponding ventilation hole 5. The sealing plate 902 can block all the ventilation holes 5 of the corresponding liquid cooling component 3, so that the gas on the upper side of the battery cell 4 in the corresponding liquid cooling component 3 cannot pass through the ventilation holes 5. The blockage reduces the gas flow through the air cooling component 8. The detection part 901 includes a diamond-shaped elastic sheet 9011 and a connector 9012. One end of the connector 9012 is fixedly connected to the sealing plate 902, and the other end is connected to the end of the rhomboid elastic sheet 9011 that extends after being compressed. It should be noted that the rhomboid elastic sheet 9011 has a connecting ring at the connection position of the connector 9012. The end of the connector 9012 is fixedly connected to a hook or buckle so that it can be connected to the connecting ring, so that the end of the connector 9012 is relatively fixed to the rhomboid elastic sheet 9011, and the length of multiple connectors 9012 is the same during assembly.

[0042] When in use, the two sides of the rhomboid elastic sheet 9011 contact the corresponding outer liner 18 of the battery cell 4. The battery cell 4 expands and squeezes the corresponding rhomboid elastic sheet 9011 to deform it and pull the connector 9012. At the same time, the other end of the connector 9012 pulls the sealing plate 902 to move and block the ventilation hole 5.

[0043] It should be noted that any rhomboid elastic sheet 9011 within the same sealing component 9, when deformed under pressure, can pull the sealing plate 902 to block the ventilation hole 5. The sealing plate 902 is installed at the lower end of the overhead plate 6 through multiple matching sheet metal structures, allowing it to slide relative to the overhead plate 6. The installation method is existing technology and will not be described in detail here.

[0044] More specifically, the sealing assembly 9 also includes: a support frame 903, which is installed inside the fixed fence 7 and can be installed by means of clips or screws for easy disassembly during maintenance. Multiple guide rings 904 are fixedly connected to the lower end, and the middle part of the connector 9012 passes through the corresponding guide ring 904 and is connected to the diamond-shaped elastic sheet 9011; a mounting frame 905, which is fixedly connected to the lower end of multiple extension rods 906. The upper end of each diamond-shaped elastic sheet 9011 is fixedly connected to the corresponding extension rod. The extension rod 906 passes through the support frame 903 and can slide relative to the support frame; the mounting frame 905 and the support frame 903 can be fixedly connected relative to each other by screws or clips.

[0045] In use, the sealing plate 902 is pre-installed on the overhead plate 6, followed by the liquid cooling assembly 3 and the battery cell 4 in sequence, and the connector 9012 is passed through the ventilation hole 5. Then, the end of the connector 9012 is passed through the guide ring 904 and connected to the diamond-shaped elastic piece 9011. Then, the support frame 903 is installed in the fixed fence 7 with screws. The diamond-shaped elastic piece 9011 is then inserted into the ventilation hole 5 so that its two sides contact the side wall of the corresponding battery cell 4. Finally, the mounting bracket 905 is connected to the support frame 903 with screws.

[0046] Furthermore, the sealing plate 902 is slidably connected to the overhead plate 6; a limiting hole 907 is provided on one side of the sealing plate 902, and a rubber boss 908 is fixedly connected to the overhead plate 6 at the position corresponding to the limiting hole 907. The rubber boss 908 is tough and can form an elastic plate. When the sealing plate 902 is subjected to tension, the rubber boss 908 can disengage from the limiting hole 907; when the rubber boss 908 is placed in the limiting hole 907, the sealing plate 902 does not block the ventilation hole 5; one end of the sealing plate 902 is fixedly connected to An elastic element 909 is attached to push the sealing plate 902 to move. The elastic element 909 can be a spring or a leaf spring, etc., which can push the sealing plate 902 to a certain extent. It should be noted that when the rubber boss 908 is placed in the limiting hole 907, the elastic element 909 is in a state of being compressed and storing force. When the sealing plate 902 is pulled and moves to separate the rubber boss 908 from the limiting hole 907, the elastic element 909 can push the sealing plate 902 to slide relative to the overhead plate 6 and close the corresponding ventilation hole 5.

[0047] During use, the battery cell 4 will expand and bulge after multiple charge and discharge cycles, affecting the stability of subsequent use and reducing the energy storage of the battery cell 4. When the battery cell 4 expands and squeezes the corresponding diamond-shaped elastic sheet 9011, it pulls the corresponding connector 9012. At the same time, the other end of the connector 9012 pulls the sealing plate 902 to slide, and the limiting hole 907 separates from the rubber boss 908. Then the elastic member 909 pushes the sealing plate 902 to block the corresponding ventilation hole 5. At this time, the number of ventilation holes 5 through which gas can pass in the fixed fence 7 is reduced, and the gas flow rate is reduced. The monitoring unit 801 monitors the change in the gas flow rate entering the fixed fence 7.

[0048] It should be noted that when the gas flow rate is at the initial flow rate and relatively stable, it indicates that the internal battery cell 4 has not experienced a bulging problem; when the gas flow rate decreases significantly and continues to be supplied at a low flow rate, it indicates that some of the internal battery cells 4 have bulged and need to be repaired in time.

[0049] More specifically, the energy storage battery system also includes: a panel 10, which is detachably mounted on one side of the opening of the protective frame 2 by bolts; both the output pipe 308 and the inlet pipe 303 pass through the panel 10; the peripheral walls of the output pipe 308 and the inlet pipe 303 are sealed to the panel 10; a heat dissipation hole 11, which is opened in the middle of the panel 10 and has multiple holes; the heat dissipation hole 11 corresponds to the gap between the overhead plate 6 and the protective frame 2 and is used to discharge the input gas; the outer side of the panel 10 can also be equipped with functional components such as the display panel 10 and the alarm to display the operating status of the energy storage battery; this is prior art and will not be described in detail here, and similar devices are not shown; a top plate 12, which is detachably mounted on the opening at the upper end of the protective frame 2 by bolts; the lower end face is attached to the top of the fixed fence 7 to close the top of the fixed fence 7; the protective frame 2, the panel 10 and the top plate 12 are combined to form an energy storage cavity, and the heat dissipation hole 11 can discharge the hot gas in the energy storage cavity.

[0050] Specifically, a connection terminal 17 is fixedly connected to the outer side of the panel 10 for outputting / inputting electrical energy of the battery cell 4. The battery cell 4 is charged and discharged after being connected to the connection terminal 17 by a wire.

[0051] More specifically, the air-cooled assembly 8 also includes: an air inlet duct 802, the input end of which penetrates through the panel 10 and is detachably connected to the panel 10 and the top plate 12. The air inlet duct 802 is connected to the panel 10 and the top plate 12 by screws. The air inlet duct 802 corresponds to and communicates with the fixed fence 7. The air inlet duct 802 can be inserted into one side of the opening of the fixed fence 7. The input end of the air inlet duct 802 is connected to the output end of the air pump / air compressor through a pipe connector or a quick-connect pipe joint. Gas is delivered into the air inlet duct 802 by the air pump. The air pump is existing technology and will not be described in detail here. Also not shown, the air inlet duct 802 is filled with filter cotton, which can filter impurities in the airflow and make the gas enter the fixed enclosure 7 evenly; the fire pipe 803 is fixedly connected to the inside of the panel 10, and the input end passes through the panel 10, and the output end is connected to fire-fighting facilities, such as the output pipe 308 of the perfluorohexanone fire extinguisher, through the pipe connector or pipe quick interface. This is existing technology and will not be described in detail here. It is also not shown in the figure. The output end of the fire pipe 803 has multiple outlets that are evenly distributed in the air inlet duct 802, which are used to spray fire extinguishing materials into the fixed enclosure 7.

[0052] It should be noted that a temperature sensor 307 or a pressure sensor is also installed inside the fixed fence 7 to monitor the temperature or pressure inside the fixed fence 7. When the battery cell 4 spontaneously combusts, the pressure and temperature inside the fixed fence 7 rise rapidly. At this time, the temperature sensor 307 / pressure sensor is triggered, and the fire-fighting facilities are activated through the controller to extinguish the fire on the battery cell 4. When the pressure inside the fixed fence 7 rises rapidly, the gas entering the air inlet duct 802 is blocked, causing a significant abnormal difference between the monitored value and the set value of the monitoring unit 801, which can also trigger the controller to activate the fire-fighting facilities.

[0053] When battery cell 4 spontaneously combusts, the fire-fighting equipment quickly delivers extinguishing materials to the fire pipe 803 and then to the fixed fence 7 through the output end to cool and extinguish the fire on the top of battery cell 4, reducing the impact of the spontaneous combustion of battery cell 4 on other equipment and achieving the purpose of rapid and targeted fire fighting.

[0054] The air-cooled assembly 8 also includes: a pressure pipe 804, which is fixedly connected to the inside of the panel 10 and its upper end is connected to the fire pipe 803. A baffle ring 805 is fixedly connected to the inside of the pressure pipe 804. The baffle ring 805 is made of flexible material and can deform under pressure. A push rod 806 is slidably connected to the inside of the pressure pipe 804 and its upper end is positioned above the baffle ring 805. When the upper end of the push rod 806 is pressed, it can pass over the baffle ring 805, causing the push rod 806 to slide downward. A sealing plate 807 is slidably connected to the inside of the panel 10 and fixedly connected to the push rod 806, used to block part of the heat dissipation holes 11.

[0055] During the fire extinguishing process, the increased pressure in the fire pipe 803 increases the pressure at the upper end of the push rod 806 in the pressure pipe 804, causing the push rod 806 to slide downwards under pressure past the partition rubber ring 805. At the same time, the sealing plate 807 slides downwards simultaneously, blocking part of the heat dissipation holes 11, reducing the leakage of fire extinguishing materials, and accelerating the fire extinguishing speed. The unblocked heat dissipation holes 11 can continue to discharge air, allowing the fire extinguishing materials to still enter the energy storage cavity.

[0056] It should be noted that, optionally, multiple through holes are opened on the bottom periphery of the pressure pipe 804 to connect it with the energy storage cavity. When the push rod 806 slides down to its limit position, the fire extinguishing material in the fire pipe 803 can enter the energy storage cavity through the through holes, thereby improving the safety of the energy storage battery. When the push rod 806 is placed above the partition rubber ring 805, the fire pipe 803 is not connected to the energy storage cavity.

[0057] Specifically, it also includes: a reset rod 13, which is slidably connected to the lower end of the overhead plate 6, and a reset boss 14 is fixedly connected to the middle of each sealing plate 902. The reset rod 13 is installed at the lower end of the overhead plate 6 through multiple matching sheet metal structures, allowing it to slide relative to the overhead plate 6. The installation method is existing technology and will not be described in detail here. A reset groove 15 is provided in the middle of the sealing plate 902. The reset groove 15 is a right-angled triangular structure. The reset boss 14 is placed in the reset groove 15. When the reset rod 13 slides to one side... The sealing plate 902 can be reset by pressing the inclined surface of the reset groove 15 with the reset boss 14; the drive unit 16 is fixedly connected to one side of the overhead plate 6, and its output end is fixedly connected to the reset rod 13. The drive unit 16 can be a linear motor or other component that can achieve linear movement. This is prior art and will not be described in detail here. In use, the drive unit 16 is electrically connected to a corresponding controller and power supply to drive the reset rod 13 to slide relative to the overhead plate 6; the reset rod 13 makes the rubber boss 908 correspond to the limiting hole 907 through the reset groove 15.

[0058] When the rubber boss 908 disengages from the limiting hole 907, the monitoring unit 801 detects a decrease in air intake. The drive unit 16 causes the reset rod 13 to slide relative to the overhead plate 6, causing the reset boss 14 to push the sealing plate 902 to reset via the reset groove 15, aligning the limiting hole 907 with the rubber boss 908. Subsequently, the drive unit 16 pushes the reset rod 13 to reset, and the monitoring unit 801 measures whether the air intake has recovered. If the air intake recovers and remains at the set air intake, it indicates that the limiting hole 907 and the rubber boss 908 have unexpectedly disengaged, and the battery cell 4 has not bulged. If the air intake briefly recovers and then decreases again, the surface battery cell 4 bulges and needs to be addressed.

[0059] It should be noted that when the battery cell 4 bulges, after the reset rod 13 pushes the sealing plate 902 to reset, the connector 9012 pulls the upper and lower ends of the rhomboid elastic sheet 9011 to undergo significant deformation. The two sides of the elastic sheet will not exert much pressure on the battery cell 4. When the reset boss 14 is no longer pressing the reset slide groove 15, the rhomboid elastic sheet 9011 will cause the limiting hole 907 to separate from the rubber boss 908 again through the connector 9012.

[0060] In summary, during installation, the overhead panel 6, liquid cooling component 3, battery cell 4, and sealing component 9 are installed sequentially inside the protective frame 2. The air cooling component 8, top plate 12, and panel 10 are then connected to the protective frame 2 to form an energy storage cavity. During use, the energy storage battery system is placed in an appropriate position, and the liquid cooling component 3 is connected to the water cooling system. At the same time, the air cooling system is connected to the air pump and fire-fighting facilities. Finally, the wires are connected to the connection terminal 17.

[0061] During operation, a water-cooling system continuously supplies low-temperature cooling water to the liquid-cooled assembly 3, allowing it to exchange heat with the battery cell 4 and cool the battery cell 4. The cooled water after heat exchange is then returned to the water-cooling system for further cooling. Simultaneously, since there is a temperature difference between the positive and negative electrodes of the battery cell 4 during charging and discharging, affecting its performance, a temperature sensor 307 detects the temperature inside the positive electrode outlet pipe 304 / negative electrode outlet pipe 305 during the cooling process. When the temperature exceeds a preset maximum value, it indicates that the temperature of the positive / negative electrodes of the battery cell 4 has risen. At this time, the regulating valve 306 increases the cooling water flow rate of the corresponding positive electrode outlet pipe 304 / negative electrode outlet pipe 305 to accelerate the heat exchange between the battery cell 4 and the cooling water, improving cooling efficiency. Conversely, the cooling water flow rate is reduced, decreasing cooling efficiency. By adjusting the flow rate, the battery cell 4 is kept at a suitable operating temperature, extending its service life.

[0062] While the liquid cooling component 3 cools the battery cell 4, the air cooling component 8 continuously supplies gas into the fixed enclosure 7, and the gas enters the energy storage cavity through the ventilation hole 5 and is then discharged through the heat dissipation hole 11. During this process, the monitoring unit 801 monitors information such as gas flow rate and velocity at all times.

[0063] When the battery cell 4 bulges after prolonged use, it will compress the corresponding diamond-shaped elastic sheet 9011, causing it to pull the corresponding connector 9012. At the same time, the other end of the connector 9012 pulls the sealing plate 902 to slide, causing the limiting hole 907 to separate from the rubber boss 908. Subsequently, under the action of the elastic element 909, the sealing plate 902 blocks the corresponding ventilation hole 5. At this time, the number of ventilation holes 5 through which gas can pass in the fixed fence 7 decreases, the gas flow rate decreases, and the gas flow rate decreases significantly. If the gas flow rate continues to be low and gas is input, it indicates that some of the battery cells 4 inside have bulged and need to be repaired or replaced in time.

[0064] To improve the accuracy of the detection, when the monitoring unit 801 detects a decrease in the air intake, the drive unit 16 slides the reset rod 13 relative to the overhead plate 6, aligning the limit hole 907 with the rubber boss 908 again. Then, the reset rod 13 is pushed to reset, and the monitoring unit 801 measures whether the air intake has recovered. If the air intake recovers and remains at the set air intake, it indicates that the limit hole 907 and the rubber boss 908 have accidentally disengaged, and the battery cell 4 has not bulged. Conversely, if the air intake briefly recovers and then decreases again, the surface battery cell 4 bulges and needs to be addressed.

[0065] When cell 4 spontaneously combusts, the fire-fighting equipment quickly delivers extinguishing materials to the fire pipe 803 and then to the fixed enclosure 7 through the output end to cool and extinguish cell 4. Simultaneously, the sealing plate 807 slides downward to block some of the heat dissipation holes 11, reducing the leakage of extinguishing materials and accelerating the extinguishing speed. During the extinguishing process, the drive unit 16 pushes the reset rod 13 to move, preventing the sealing plate 902 from sliding and forcibly keeping all ventilation holes 5 open, allowing extinguishing materials to enter the energy storage cavity.

[0066] Example 2

[0067] During use, it was found that when the above-mentioned energy storage system expands, due to the small width of the ventilation hole 5, the battery cell 4 needs to expand to a higher position before the diamond-shaped elastic sheet 9011 can be triggered. At this time, the internal pressure of the battery cell 4 is large, which can easily cause damage and spontaneous combustion. The expansion of the battery cell 4 cannot be monitored in time. Therefore, further improvements have been made to the solution of the present invention.

[0068] like Figure 13 As shown, the fin-shaped ends of the positive electrode side 301 and the negative electrode side 302 are made of flexible material and are connected to the positive electrode side 301 / negative electrode side 302. The flexible part is fixedly connected to the positive electrode side 301 / negative electrode side 302 and does not contact the partition 309.

[0069] When in use, the expansion of cell 4 can compress the flexible part to deform, avoiding the rigid fin structure from compressing the expanded part of the side wall of cell 4. When the internal pressure of cell 4 increases, the diamond elastic sheet 9011 can be triggered in time, improving the safety of the energy storage system.

[0070] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A box-type energy storage battery system, comprising a water-cooling system for cooling water circulation and cooling, characterized in that, Also includes: The protective frame has an opening at the top and on one side. The liquid cooling assembly has multiple sets and is placed inside a protective frame. The liquid cooling assembly includes a positive electrode side and a negative electrode side. Both the positive electrode side and the negative electrode side are fin-shaped hollow structures and are symmetrically arranged. Both the positive electrode side and the negative electrode side are connected to the water cooling system. The battery cell has multiple cells, which are placed between the positive and negative sides. The positive end of the cell is in contact with the positive side, and the negative end of the cell is in contact with the negative side. The cell is cooled by the positive and negative sides. Ventilation holes are provided between the positive and negative sides and the battery cell; The overhead plate is detachably installed inside the protective frame and placed at the bottom of the battery cell and liquid cooling assembly. There is a gap between the lower end of the overhead plate and the protective frame, and it is connected to the ventilation hole. A fixed fence, which is fitted onto the top of multiple liquid-cooled components, is used to guide airflow into the ventilation holes; An air-cooled assembly, detachably mounted on one side of a fixed fence, is used to input gas into the fixed fence. The air-cooled assembly includes a monitoring unit for monitoring the gas flow rate entering the fixed fence. The sealing assembly is the same number and corresponds to the liquid cooling assembly. The sealing assembly includes multiple detection parts and sealing plates. Each detection part is placed in a corresponding ventilation hole. The sealing plate can block all the ventilation holes of the corresponding liquid cooling assembly. The detection unit includes a rhomboid elastic sheet and a connector. One end of the connector is fixedly connected to the sealing plate, and the other end is connected to the end of the rhomboid elastic sheet that extends after being compressed. The expansion of the battery cell compresses the corresponding rhomboid elastic sheet, and the connector causes the sealing plate to block the ventilation hole. The monitoring unit monitors the change in the gas flow rate entering the fixed enclosure. The sealing assembly further includes: a support frame, which is installed on the inside of the fixed fence, and a plurality of guide rings are fixedly connected to its lower end, with the middle part of the connector passing through the corresponding guide ring; The mounting frame has multiple extension rods fixedly connected to its lower end. The upper end of each of the diamond-shaped elastic pieces is fixedly connected to the corresponding extension rod, and the extension rods pass through the support frame. The mounting bracket and the support bracket are fixed relative to each other.

2. The box-type energy storage battery system according to claim 1, characterized in that, The liquid cooling assembly also includes: The liquid inlet pipe is connected to one end of the positive electrode side and one end of the negative electrode side, and is also connected to the water outlet of the water cooling system. It is used to input low-temperature cooling water into the positive electrode side and the negative electrode side. The positive electrode outlet pipe is connected to the end of the positive electrode side away from the inlet pipe; The negative electrode outlet pipe is connected to the end of the negative electrode side away from the inlet pipe; The regulating valves are connected to the ends of the positive and negative outlet pipes respectively, and are used to control the flow rates of the positive and negative outlet pipes. Temperature sensors are fixedly connected to the positive and negative outlet pipes respectively. The temperature sensors monitor the temperature in the positive and negative outlet pipes and control the flow rate of the positive and negative outlet pipes through the regulating valves. The output end of the regulating valve is connected to the same output pipe, which is connected to the return water end of the water cooling system. This is used to return the cooled water after heat exchange to the water cooling system for cooling.

3. The box-type energy storage battery system according to claim 1, characterized in that, A partition is fixedly connected to the middle of both the positive and negative electrode sides to guide the cooling water flow into the fin-shaped position. The ends of the fin-shaped positions on both the positive and negative electrode sides are made of flexible material.

4. A box-type energy storage battery system according to claim 2, characterized in that, Also includes: A panel, which is detachably mounted on one side of the opening of the protective frame, with both the output pipe and the inlet pipe penetrating through the panel; The heat dissipation holes are located in the middle of the panel and there are multiple holes, which correspond to the gap between the overhead plate and the protective frame. The top plate is detachably installed at the opening on the upper part of the protective frame, and its lower end face is attached to the top of the fixed fence. The protective frame, panel, and top plate are combined to form an energy storage cavity.

5. A box-type energy storage battery system according to claim 4, characterized in that, The air-cooling component also includes: The air inlet duct has its input end penetrating through the panel and is detachably connected to the panel and top plate. The air inlet duct corresponds to and is connected to the fixed fence. Fire extinguishing pipes are fixedly connected to the inside of the panel, with the input end penetrating through the panel and multiple output ends evenly distributed inside the air inlet duct, used to spray fire extinguishing materials into the fixed enclosure. The pressure pipe is fixedly connected to the inside of the panel, and its upper end is connected to the fire pipe. A baffle rubber ring is fixedly connected to the inside of the pressure pipe. The push rod is slidably connected to the inside of the pressure tube, and its upper end is positioned above the partition rubber ring; A sealing plate, which is slidably connected to the inside of the panel and fixedly connected to the push rod, is used to block some of the heat dissipation holes.

6. A box-type energy storage battery system according to claim 5, characterized in that, The sealing plate is slidably connected to the overhead plate; A limit hole is provided on one side of the sealing plate, and a rubber boss is fixedly connected to the corresponding position of the limit hole on the overhead plate; When the rubber boss is placed inside the limiting hole, the sealing plate does not block the ventilation hole; One end of the sealing plate is fixedly connected to an elastic element for pushing the sealing plate to move.

7. A box-type energy storage battery system according to claim 6, characterized in that, Also includes: The reset rod is slidably connected to the lower end of the overhead plate, and a reset boss is fixedly connected to the middle of the plate corresponding to the position of each sealing plate. A reset groove is provided in the middle of the sealing plate; The reset boss is placed inside the reset groove; The drive unit is fixedly connected to one side of the overhead plate, and its output end is fixedly connected to the reset rod, which is used to drive the reset rod to slide relative to the overhead plate. The reset rod aligns the rubber boss with the limiting hole via the reset groove.

8. A box-type energy storage battery system according to claim 1, characterized in that, Also includes: The liner plates are placed between the side of the battery cell and the positive and negative sides, respectively.

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