Energy storage box and energy storage system

Abstract

The application relates to the technical field of energy storage, in particular to an energy storage box and an energy storage system. The application aims to solve the technical problem of low safety performance of the energy storage box. The application provides an energy storage box, which comprises a box body, an energy storage module and a liquid cooling unit. A partition plate is arranged in the box body, the partition plate divides the box body into a first cavity and a second cavity, the liquid cooling unit is arranged in the first cavity, and the energy storage module is arranged in the second cavity. An air inlet and an air outlet are arranged on the box body, and a first fan is arranged at the air outlet. An exhaust port is arranged on the partition plate, an air outlet damper is arranged at the exhaust port, and a control device is connected with the air outlet damper. When the air outlet damper is opened, the first cavity and the second cavity are communicated, and combustible gas can flow into the first cavity through the air outlet damper. The first fan can guide the combustible gas to flow to the air outlet, so that the combustible gas flows out of the energy storage box through the air outlet, explosion of the energy storage box is avoided, and the safety performance and stability of the energy storage box are improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to an energy storage box and an energy storage system. Background Technology

[0002] Energy storage boxes typically include liquid cooling units, battery packs, functional modules, and safety components. When the battery pack experiences thermal runaway, it generates a large amount of flammable gas. If this gas is not released in time, and its pressure reaches a certain threshold and it ignites, the explosion vent in the safety components will rupture, releasing the gas and preventing a violent explosion. However, the explosion vent only activates when the pressure of the flammable gas inside the box is high and it has ignited. By this time, the battery pack has already exploded, and the explosion vent cannot prevent the battery pack from exploding, resulting in low safety performance of the energy storage box. Utility Model Content

[0003] This application provides an energy storage box and energy storage system that can prevent battery pack explosions and improve the safety performance of the energy storage box.

[0004] In a first aspect, embodiments of this application provide an energy storage box, including a box body, an energy storage module, a liquid cooling unit, an air outlet valve, and a control device. The energy storage module is disposed within the box body. A partition is provided within the box body, dividing the box body into a first cavity and a second cavity. The liquid cooling unit is disposed within the first cavity, and the energy storage module is disposed within the second cavity.

[0005] The liquid cooling unit includes a first fan, and the casing is equipped with an air inlet and an air outlet, with the first fan located at the air outlet. An exhaust port is provided on the partition, and an exhaust valve is located at the exhaust port. A control device is connected to the exhaust valve, and the control device is used to control the exhaust valve to open when the concentration of combustible gas in the second chamber is greater than or equal to a first threshold.

[0006] A partition with an exhaust port connects the liquid chiller and the energy storage module, allowing combustible gas to flow from the second chamber to the first chamber. An exhaust valve is located at the exhaust port, and a control device is connected to it. When the concentration of combustible gas is greater than or equal to a first threshold, the control device sends a control signal to the exhaust valve, causing it to open. With the exhaust valve open, the first and second chambers are connected, allowing combustible gas near the energy storage module to flow into the first chamber through the exhaust valve.

[0007] Meanwhile, since the liquid cooling unit includes a first fan, the first fan can guide the combustible gas to the air outlet, allowing the combustible gas to flow out of the energy storage tank through the air outlet, thus preventing the energy storage tank from exploding. The first fan can increase the flow rate of the combustible gas, causing the concentration of combustible gas inside the energy storage tank to decrease rapidly, thereby improving the safety performance and stability of the energy storage tank.

[0008] In some embodiments that may include the above embodiments, the energy storage box further includes an air inlet valve. An air inlet is provided on the box body, which is connected to the second cavity and the air inlet is connected to the exhaust port. The air inlet valve is located at the air inlet. A control device is connected to the air inlet valve. The control device is also used to control the air inlet valve to open when the concentration of combustible gas in the second cavity is greater than or equal to a first threshold.

[0009] The housing is equipped with an air inlet that connects to the second chamber. An air inlet valve is located at the air inlet. When the air inlet valve is open, the second chamber is connected to the outside, allowing air to enter through the air inlet. Since both the air inlet and outlet valves are connected to a control device, and the air inlet is connected to the exhaust outlet, when the concentration of combustible gas in the second chamber reaches a first threshold, both the air inlet and outlet valves open simultaneously. This creates an air duct between the air inlet and outlet valves, allowing combustible gas to enter the first chamber along the duct and flow to the outside of the energy storage tank under the guidance of the first fan. This further increases the flow rate of combustible gas in the second chamber, accelerates the discharge rate of combustible gas from the second chamber, and improves the safety performance of the energy storage tank.

[0010] In some embodiments that may include the above embodiments, the air outlet valve includes a valve body and a second fan, the valve body is disposed at the exhaust port, and the air inlet of the second fan faces the second cavity.

[0011] The air inlet of the second fan faces the second chamber. The second fan can push the gas in the second chamber to flow into the first chamber, thus transferring the combustible gas from the second chamber to the first chamber. The second fan can further increase the flow rate of combustible gas between the second and first chambers, accelerate the discharge rate of combustible gas in the second chamber, and improve the safety performance of the energy storage tank.

[0012] In some embodiments that may include the above-described embodiments, the refrigeration device includes a first heat exchanger, a second heat exchanger, and a compressor. The air inlet surface of the second heat exchanger faces the air inlet, and the air outlet surface of the second heat exchanger faces the air outlet. The first heat exchanger includes a first plate and a second plate. The compressor is connected to both the first plate and the second heat exchanger, and the second heat exchanger is also connected to the first plate. The second plate is used to connect to the liquid-cooled plate of the energy storage module, and the second plate is used for heat exchange with the first plate.

[0013] The second plate is connected to the liquid cooling plate. After heat exchange with the first plate, the second plate can regulate the temperature of the liquid inside the liquid cooling plate, thereby regulating the temperature of the battery pack and ensuring that the battery pack operates at a suitable temperature for normal operation. The second heat exchanger is located between the air inlet and the air outlet. Air can enter the first cavity through the air inlet and leave the first cavity through the air outlet. The air can exchange heat with the second heat exchanger, thereby regulating the temperature of the fluid inside the first plate and allowing the first plate to continuously exchange heat with the second plate.

[0014] In some embodiments that may include the above embodiments, the housing includes a first side wall and a top wall, the top wall is parallel to the partition, the first side wall is perpendicular to the top wall and the partition, the first side wall and the top wall are arranged adjacent to each other, the air inlet is arranged on the first side wall, the air outlet is arranged on the top wall, and the plane where the air inlet end of the second heat exchanger is located is inclined relative to the first side wall.

[0015] The air inlet is located on the first side wall, and the air outlet is located on the top wall. The plane where the air inlet of the second heat exchanger is located is inclined relative to the first side wall, which can increase the air inlet area and air outlet area of ​​the second heat exchanger, thereby increasing the heat exchange area between the air and the second heat exchanger, improving the heat exchange rate of the second heat exchanger, and thus improving the heat dissipation rate of the energy storage box.

[0016] In some embodiments that may include the above embodiments, the air outlet valve is located on the side of the second heat exchanger near the air outlet.

[0017] The air outlet valve is located on the side of the second heat exchanger near the air outlet. When the air outlet valve is open, the combustible gas can flow directly to the air outlet. The second heat exchanger will not obstruct the flow of the combustible gas, thus avoiding a decrease in the flow rate of the combustible gas and ensuring a high discharge rate of the combustible gas.

[0018] In some embodiments that may include the above embodiments, the air inlet includes a first air inlet and a second air inlet, the housing also includes a second sidewall, the second sidewall is parallel to and opposite to the first sidewall, the second sidewall is adjacent to the top wall, the first air inlet is disposed on the first sidewall, the second air inlet is disposed on the second sidewall, the second heat exchanger includes a first sub-heat exchanger and a second sub-heat exchanger, the first sub-heat exchanger and the second sub-heat exchanger are spaced apart, the air inlet surface of the first heat exchanger faces the first air inlet, the air outlet surface of the first heat exchanger faces the air outlet, the air inlet surface of the second sub-heat exchanger faces the second air inlet, and the air outlet surface of the second sub-heat exchanger faces the air outlet.

[0019] The air outlet includes a first air inlet and a second air inlet. Air can enter the first cavity through either the first or second air inlet. Increasing the airflow rate of the liquid-cooled unit per unit time accelerates the heat exchange rate between the air and the second heat exchanger, thus improving the heat dissipation rate of the energy storage tank. The first and second air inlets are positioned opposite each other to avoid uneven airflow distribution within the first cavity, preventing localized overheating and ensuring the cooling effect of the second heat exchanger. The second heat exchanger includes a first sub-heat exchanger and a second sub-heat exchanger. The increased heat exchange area of ​​the second heat exchanger enhances the heat exchange rate between it and the air, thereby improving the heat dissipation rate of the energy storage tank.

[0020] In some embodiments that may include the above embodiments, the exhaust port includes a first hole and a second hole, the first hole and the second hole are spaced apart, and the air outlet valve includes a first air valve and a second air valve, the first air valve is disposed in the first hole, and the second air valve is disposed in the second hole.

[0021] The air outlet valve includes a first air valve and a second air valve. With the increase in the number of air outlet valves, the total amount of combustible gas flowing from the second chamber to the first chamber per unit time increases when the air outlet valve is open. This can further improve the discharge rate of combustible gas and enhance the safety performance of the energy storage box.

[0022] In some embodiments that may include the above embodiments, the first air valve is disposed on the side of the first sub-heat exchanger away from the first air inlet, and the second air valve is disposed on the side of the second sub-heat exchanger away from the second air inlet.

[0023] When the first and second air valves are open, combustible gas can enter the first cavity through the first and second air valves and leave the energy storage box directly through the air outlet. This avoids the combustible gas passing through the first and second sub-heat exchangers, which would reduce the flow rate of the combustible gas. This ensures a high flow rate of the gas that can be contained and guarantees the discharge rate of the combustible gas, thereby ensuring a high safety performance of the energy storage box.

[0024] In some embodiments that may include the above embodiments, the first air valve is disposed on the side of the first sub-heat exchanger near the first air inlet, and the second air valve is disposed on the side of the second sub-heat exchanger near the second air inlet.

[0025] The gap between the first air inlet and the first sub-heat exchanger is relatively large. The first air valve is positioned on the side of the first sub-heat exchanger closest to the first air inlet, ensuring a large ventilation area and a high total volume of combustible gas passing through it per unit time, thus guaranteeing a high combustible gas discharge rate. Similarly, the gap between the second air inlet and the second sub-heat exchanger is also relatively large. The second air valve is positioned on the side of the second sub-heat exchanger closest to the second air inlet, ensuring a large ventilation area and a high total volume of combustible gas passing through it per unit time, thus guaranteeing a high combustible gas discharge rate.

[0026] In some embodiments that may include the above embodiments, the air outlet valve includes a cover plate and a drive structure. The cover plate is connected to the partition plate through the drive structure, and the control device is electrically connected to the drive structure. The air outlet valve includes a closed state and an open state. When the air outlet valve is in the closed state, the cover plate covers the exhaust port. When the air outlet valve is in the open state, the cover plate blocks the air inlet. The drive structure is used to drive the cover plate to rotate toward the air inlet.

[0027] When the air outlet valve is closed, the cover plate covers the exhaust port, preventing gas from flowing between the first and second chambers and ensuring the normal operation of the liquid-cooled unit. The cover plate is connected to the partition plate via a drive structure, and the control device is electrically connected to the drive structure. When the control device controls the drive structure, the cover plate can rotate towards the air inlet, allowing combustible gas to pass through the exhaust port from the second chamber into the first chamber, thereby allowing the combustible gas to be discharged from the air outlet, reducing the total amount of combustible gas in the energy storage tank and improving the safety performance of the energy storage tank.

[0028] Meanwhile, because the cover rotates towards the air inlet, and when the air outlet valve is open, the cover blocks the air inlet, preventing combustible gas from flowing from the exhaust port to the air inlet. The cover ensures that combustible gas flows from the exhaust port to the air outlet, improving the accuracy of the gas flow path and preventing combustible gas from accumulating at the air inlet, thus avoiding risks to inspection personnel or other equipment.

[0029] In some embodiments that may include the above embodiments, the air outlet valve includes a cover plate and a drive structure. The cover plate is connected to the partition plate through the drive structure, and the control device is electrically connected to the drive structure. The air outlet valve includes a closed state and an open state. When the air outlet valve is in the closed state, the cover plate covers the exhaust port. When the air outlet valve is in the open state, the first cavity and the second cavity are connected, and the drive structure is used to drive the cover plate to slide relative to the exhaust port.

[0030] When the air outlet valve is closed, the cover plate covers the exhaust port, preventing gas from flowing between the first and second chambers and ensuring the normal operation of the liquid-cooled unit. The cover plate is connected to the partition plate via a drive structure, and the control device is electrically connected to the drive structure. When the control device controls the drive structure, the cover plate can rotate towards the air inlet, allowing combustible gas to pass through the exhaust port from the second chamber into the first chamber, thereby allowing the combustible gas to be discharged from the air outlet, reducing the total amount of combustible gas in the energy storage tank and improving the safety performance of the energy storage tank.

[0031] Secondly, embodiments of this application provide an energy storage system, including a plurality of the above-mentioned energy storage boxes arranged at intervals, and the plurality of energy storage boxes are arranged in an array.

[0032] The energy storage system provided in this application includes the energy storage box in any of the above embodiments. Therefore, both can solve the same technical problem and achieve the same technical effect. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application;

[0034] Figure 2 This is a schematic diagram of the structure of the energy storage box provided in the embodiments of this application;

[0035] Figure 3 for Figure 2 Sectional view along axis AA;

[0036] Figure 4 A schematic diagram of an energy storage box equipped with functional modules provided in an embodiment of this application;

[0037] Figure 5 for Figure 4 BB-direction sectional view;

[0038] Figure 6 This is a schematic diagram of the structure of the liquid cooling unit provided in the embodiments of this application;

[0039] Figure 7 This is a schematic diagram of the structure inside the first cavity when the air outlet valve is not open, as provided in the embodiments of this application. Figure 1 ;

[0040] Figure 8 This is a schematic diagram of the structure of the first cavity after the air outlet valve is opened, as provided in the embodiments of this application. Figure 1 ;

[0041] Figure 9 This is a schematic diagram of the structure inside the first cavity when the air outlet valve is not open, as provided in the embodiments of this application. Figure 2 ;

[0042] Figure 10 This is a schematic diagram of the structure of the first cavity after the air outlet valve is opened, as provided in the embodiments of this application. Figure 2 ;

[0043] Figure 11 This is a schematic diagram of the structure inside the first cavity when the air outlet valve is not open, as provided in the embodiments of this application. Figure 3 ;

[0044] Figure 12 This is a schematic diagram of the structure of the first cavity after the air outlet valve is opened, as provided in the embodiments of this application. Figure 3 .

[0045] Explanation of reference numerals in the attached figures:

[0046] 10: Energy storage system; 20: Energy storage box; 21: Box body; 21a: Air inlet; 21b: Air outlet; 211: First cavity; 212: Second cavity; 22: Energy storage module; 221: Battery pack; 222: Liquid cooling plate; 23: Liquid cooling unit; 24: Partition; 25: Air outlet valve; 251: Valve body; 26: Air inlet valve; 27: Combustible gas detection device; 28: Functional module; 29: Baffle; 31: First fan; 32: Second fan 33: First heat exchanger; 34: Second heat exchanger; 341: First sub-heat exchanger; 342: Second sub-heat exchanger; 35: Compressor; 41: Exhaust port; 411: First hole; 412: Second hole; 42: Air inlet; 43: First side wall; 44: Top wall; 45: First air inlet; 46: Second air inlet; 47: Second side wall; 50: Cover plate; 51: First cover plate; 52: Second cover plate; 61: First air valve; 62: Second air valve. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0049] Furthermore, in the embodiments of this application, directional terms such as "up," "down," "left," "right," "horizontal," and "vertical" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0050] It should be noted that, in the description of the embodiments of this application, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or an integral connection; they can also refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0051] Please refer to Figure 1 The energy storage system 10 provided in this application embodiment includes multiple energy storage boxes 20 arranged at intervals. By adjusting the number of energy storage boxes 20, the capacity of the energy storage system 10 can be changed to adapt to different energy storage scenarios. It is understood that when the capacity of the energy storage system 10 is small, it can be used in small factories, commercial parks, campuses, charging stations, etc. The energy storage system 10 can serve as a backup power source to assist in power supply.

[0052] For example, in an embodiment where the energy storage system 10 is used in a charging station, the energy storage system 10 can release the stored electrical energy during peak electricity consumption periods to meet the charging needs of the charging station, thereby significantly reducing electricity costs and avoiding power supply instability caused by excessive grid load.

[0053] When the energy storage box 20 has a large capacity, it can be used in microgrids, wind power generation scenarios, photovoltaic power generation scenarios, etc. In embodiments where the energy storage system 10 is used in wind power generation scenarios and photovoltaic power generation scenarios, the energy storage system 10 can utilize wind and solar energy for charging, serving as a backup power source. It provides power support when power supply is insufficient or interrupted, ensuring the normal operation of critical equipment. Simultaneously, because the energy storage system 10 can store electrical energy, it can be used in geographically remote areas, areas with harsh climates, and areas with unstable power grids, improving the stability and reliability of power supply in these areas.

[0054] In this embodiment, the length direction of the energy storage box 20 is the x-direction, the width direction of the energy storage box 20 is the y-direction, and the height direction of the energy storage box 20 is the z-direction, which will not be described in detail later.

[0055] Multiple energy storage boxes 20 are arranged in an array. For example, several of the multiple energy storage boxes 20 are spaced apart along the length direction x of the energy storage box 20, and the remaining energy storage boxes 20 are spaced apart along the width direction y of the energy storage box 20. The spaced arrangement of multiple energy storage boxes 20 can ensure air circulation space between each energy storage box 20, reduce heat conduction between adjacent energy storage boxes 20, and reduce the risk of energy storage box 20 failure or thermal runaway caused by local high temperature.

[0056] Meanwhile, the spacing between multiple energy storage boxes 20 can also avoid excessive concentration of cables and connectors, reduce the probability of electromagnetic interference, and provide a safer operating space for insulation monitoring and fault diagnosis of the energy storage boxes 20.

[0057] Please refer to Figure 2The energy storage box 20 provided in this application embodiment includes a box body 21 and an energy storage module 22, with the energy storage module 22 disposed within the box body 21. This application embodiment does not limit the box body 21; for example, the box body 21 can be a shipping container. In embodiments where the box body 21 is a shipping container, when multiple energy storage boxes 20 are included, the containers can be stacked for transport, improving the transport speed and space utilization of the energy storage boxes 20.

[0058] It is understood that the energy storage module 22 can participate in the storage and release of electrical energy, and the energy storage module 22 includes a stacked battery pack 221. Here, the battery pack 221 refers to a battery system that combines multiple battery cells in a certain configuration and connection method. This application embodiment does not limit the type of battery cell; for example, the battery cell can be a sodium-ion battery, a lithium-ion battery, a lead-acid battery, etc.

[0059] In embodiments where the energy storage module 22 includes multiple battery packs 221, this application embodiment does not limit the connection method between the multiple battery packs 221. A suitable connection method can be selected according to the actual situation. For example, the multiple battery packs 221 can be connected in series or in parallel.

[0060] In an embodiment where multiple battery packs 221 are connected in series, the negative terminal of one battery pack 221 is connected to the positive terminal of the next adjacent battery pack 221, forming a battery string. Connecting multiple battery packs 221 in series can significantly increase the total voltage of the energy storage module 22.

[0061] In an embodiment where multiple battery packs 221 are connected in parallel, the positive terminals of the multiple battery packs 221 are connected together, the negative terminals of the multiple battery packs 221 are connected together, and the multiple battery packs 221 jointly provide current. Connecting multiple battery packs 221 in parallel can significantly improve the total capacity and current output capability of the energy storage module 22.

[0062] Since the battery pack 221 generates heat during operation, a liquid cooling plate is also provided inside the energy storage module 22. The liquid cooling plate is filled with coolant. When the battery pack 221 comes into contact with the liquid cooling plate, the coolant can absorb the heat of the battery pack 221, thereby reducing the temperature of the battery pack 221 and cooling it.

[0063] The embodiments of this application do not limit the position of the liquid cooling plate. For example, in some embodiments, the liquid cooling plate is disposed inside the battery pack 221 and in contact with the individual battery cells. The liquid cooling plate can absorb the heat from the individual battery cells and reduce their temperature. In other embodiments, the liquid cooling plate is disposed outside the battery pack 221 and in contact with it. The liquid cooling plate can absorb the heat from the battery pack 221 and reduce its temperature.

[0064] Please refer to Figure 2 and Figure 3 The energy storage box 20 provided in this application embodiment also includes a liquid cooling unit 23. A partition 24 is provided inside the box body 21, which divides the box body 21 into a first cavity 211 and a second cavity 212. The liquid cooling unit 23 is disposed in the first cavity 211, and the energy storage module 22 is disposed in the second cavity 212.

[0065] The liquid cooling unit 23 also includes a first fan 31. The housing 21 is provided with an air inlet 21a and an air outlet 21b, and the first fan 31 is located at the air outlet 21b.

[0066] This application embodiment does not limit the first fan 31. For example, the first fan 31 can be an axial flow fan or a centrifugal fan. This application embodiment also does not limit the number of first fans 31. For example, the number of first fans 31 can be one or more. Specifically, the number of first fans 31 can be two, three, etc.

[0067] Guided by the first fan 31, air enters the liquid-cooled unit 23 through the air inlet 21a and exits through the air outlet 21b. After absorbing heat from the coolant, the temperature of the liquid-cooled unit 23 rises. The air carries away the heat from the liquid-cooled unit 23 and out through the air outlet 21b, allowing the liquid-cooled unit 23 to continue cooling the coolant.

[0068] Continue to refer to Figure 3 The energy storage box 20 provided in this application embodiment also includes an air outlet valve 25 and a control device. An exhaust port 41 is provided on the partition 24, the air outlet valve 25 is provided at the exhaust port 41, and the control device is connected to the air outlet valve 25. The control device is used to control the opening of the air outlet valve 25 when the concentration of combustible gas in the second cavity is greater than or equal to the first threshold.

[0069] The location of the control device is not limited in the embodiments of this application. For example, the control device may be located in the first cavity 211, the control device may be located in the second cavity 212, or the control device may be located outside the energy storage box 20.

[0070] After thermal runaway occurs in battery pack 221, a large amount of flammable gases such as hydrogen (H2), carbon monoxide (CO), and methane (CH4) will be produced. The accumulation of flammable gases in the energy storage box 20 can easily cause an explosion, resulting in the disintegration of the energy storage box 20.

[0071] It is understandable that the first threshold values ​​differ for different combustible gases. For example, in embodiments where the combustible gas includes hydrogen, the proportion of hydrogen in the combustible gas is generally around 50%. Considering the need for early detection to control the hydrogen concentration within a certain proportion of the lower explosive limit of the combustible gas, the first threshold value for hydrogen can be 1000 PPM-6000 PPM. Specifically, the hydrogen concentration can be 1000 PPM, 2000 PPM, 4000 PPM, 5000 PPM, or 6000 PPM. In embodiments where the combustible gas includes carbon monoxide, the proportion of carbon monoxide in the combustible gas is generally around 10%. Considering the need for early detection to control the carbon monoxide concentration within a certain proportion of the lower explosive limit of the combustible gas, the first threshold value for carbon monoxide can be 200 PPM-1000 PPM. Specifically, the carbon monoxide concentration can be 200 PPM, 300 PPM, 500 PPM, 700 PPM, 800 PPM, or 1000 PPM. Here, PPM (Parts Per Million) refers to the volume of combustible gas contained in one million volumes of air.

[0072] Since a partition 24 is provided between the liquid cooling unit 23 and the energy storage module 22, and an exhaust port 41 is provided on the partition 24, the exhaust port 41 can connect the first cavity 211 and the second cavity 212, so that combustible gas can flow from the second cavity 212 to the first cavity 211.

[0073] An exhaust valve 25 is located at the exhaust port 41. A control device is connected to the exhaust valve 25. When the concentration of combustible gas in the second chamber 212 is greater than or equal to a first threshold, the control device can send a control signal to the exhaust valve 25, causing the exhaust valve 25 to open. When the exhaust valve 25 is open, the first chamber 211 and the second chamber 212 are connected, and the combustible gas in the first chamber 211 (i.e., the combustible gas generated by the energy storage module 22) can flow into the second chamber 212 through the exhaust valve 25.

[0074] Meanwhile, since the liquid cooling unit 23 includes a first fan 31, the first fan 31 can guide the combustible gas to the air outlet 21b, allowing the combustible gas to flow out of the energy storage tank 20 through the air outlet 21b, thus preventing the energy storage tank 20 from exploding. The first fan 31 can increase the flow rate of the combustible gas, causing the concentration of combustible gas in the energy storage tank 20 to decrease rapidly, thereby improving the safety performance and stability of the energy storage tank 20.

[0075] Continue to refer to Figure 3In the above embodiment, the energy storage box 20 also includes a combustible gas detection device 27, which is disposed in the second cavity 212. The control device is electrically connected to the combustible gas detection device 27. The control device is used to control the air outlet valve 25 to open when the combustible gas concentration detected by the combustible gas detection device 27 in the second cavity 212 is greater than or equal to a preset threshold.

[0076] The combustible gas detection device 27 can detect the concentration of combustible gas in the second chamber 212. When the concentration of combustible gas in the second chamber 212 reaches a preset threshold, it sends a signal to the control device, causing the control device to control the air outlet valve 25 to open, so as to prevent the concentration of combustible gas in the second chamber 212 from reaching the explosive concentration, prevent the energy storage box 20 from exploding due to excessively high concentration of combustible gas in the second chamber 212, improve the safety performance of the energy storage box 20, and ensure the stability of the energy storage box 20.

[0077] Please refer to Figure 4 In some embodiments, the energy storage box 20 also includes a functional module 28, which is spaced apart from the energy storage module 22. The functional module 28 is connected to each battery pack 221, and control of each battery pack 221 can be achieved by sending control signals to the functional module 28.

[0078] Functional module 28 includes a power distribution module and a fire protection module. The power distribution module generally includes a battery control unit (BCU), a switch, and an auxiliary power supply board. Functional module 28 also includes a circuit board on which the battery control unit, switch, and auxiliary power supply board are mounted. The battery control unit can be connected to the voltage and temperature sensors of the battery pack 221 via acquisition lines to monitor and manage the status of the battery pack 221, such as voltage, temperature, and remaining charge (State of Charge, SOC).

[0079] The switch and battery control unit (BCU) can be connected via digital signal lines. The BCU can transmit control signals to the switch, which can receive and respond to control the switching on and off of the battery pack 221. The auxiliary power board is electrically connected to the battery pack 221. The auxiliary power board can adjust the output power of the battery pack 221. Since the voltage of the battery pack 221 is prone to fluctuations during charging and discharging, the auxiliary power board can stabilize the output voltage of the battery pack 221, improving its output stability. Simultaneously, the auxiliary power board can also reduce high-frequency noise interference with the control signals, enhancing system stability.

[0080] The fire protection module may include sensors and fire extinguishing devices, with the sensors electrically connected to the fire extinguishing devices. This application does not limit the types of sensors used; for example, the sensors may be temperature sensors, smoke sensors, flame sensors, etc.

[0081] In embodiments where the sensor is a temperature sensor, when the sensor detects that the temperature on the surface of the battery pack 221 reaches a certain value, it transmits a control signal to the fire extinguishing device, causing the fire extinguishing device to open and initiate fire extinguishing operations. In embodiments where the sensor is a smoke sensor, when the sensor detects that the smoke concentration inside the energy storage box 20 reaches a certain value, it transmits a control signal to the fire extinguishing device, causing the fire extinguishing device to open and initiate fire extinguishing operations. In embodiments where the sensor is a flame sensor, after detecting an open flame, the sensor transmits a control signal to the fire extinguishing device, causing the fire extinguishing device to open and initiate fire extinguishing operations.

[0082] This application does not limit the fire extinguishing device. For example, the fire extinguishing device can be a gas fire extinguisher, a water-based fire extinguisher, a dry powder fire extinguisher, etc.

[0083] Continue to refer to Figure 4 In some embodiments, a baffle 29 is provided between the functional module 28 and the energy storage module 22, and the two ends of the baffle 29 are respectively connected to the housing 21.

[0084] The baffle 29 can separate the functional module 28 and the energy storage module 22. The baffle 29 can prevent the energy storage module 22 from causing electromagnetic interference to the functional module 28, ensuring the accuracy of the operation of the functional module 28. At the same time, the baffle 29 can also protect the functional module 28, preventing the energy storage module 22 from directly affecting the functional module 28 when it suffers thermal failure or other problems, thus ensuring the normal use of the functional module 28.

[0085] Please refer to the first threshold. Figure 5 In the above embodiment, the energy storage box 20 further includes an air inlet valve 26. An air inlet 42 is provided on the box body 21, communicating with the second cavity 212 and the exhaust port 41. The air inlet valve 26 is located at the air inlet 42. A control device is connected to the air inlet valve 26, and the control device is also used to control the opening of the air inlet valve 26 when the concentration of combustible gas in the second cavity 212 is greater than or equal to a first threshold.

[0086] An air inlet 42 is provided on the housing 21, which is connected to the second cavity 212. An air inlet valve 26 is provided at the air inlet 42. When the air inlet valve 26 is opened, the second cavity 212 is connected to the outside, and air can enter the second cavity 212 through the air inlet 42.

[0087] Since both the inlet valve 26 and the outlet valve 25 are connected to the control device, when the concentration of combustible gas in the second cavity 212 reaches the first threshold, the inlet valve 26 and the outlet valve 25 open simultaneously, forming an air duct between them. This allows the combustible gas to enter the first cavity 211 along the air duct and flow to the outside of the energy storage box 20 under the guidance of the first fan 31. This further increases the flow rate of the combustible gas in the second cavity 212, accelerates the discharge rate of the combustible gas in the second cavity 212, and improves the safety performance of the energy storage box 20.

[0088] Continue to refer to Figure 5 In some embodiments, the air outlet valve 25 includes a valve body 251 and a second fan 32. The valve body 251 is disposed at the exhaust port 41, and the air inlet of the second fan 32 faces the second cavity 212. This application embodiment does not limit the second fan 32. For example, the second fan 32 can be a centrifugal fan or an axial fan.

[0089] The air inlet of the second fan 32 faces the second cavity 212. The second fan 32 can push the combustible gas in the second cavity 212 to flow into the first cavity 211, so that the combustible gas is transferred from the second cavity 212 to the first cavity 211. The second fan 32 can further increase the flow rate of combustible gas between the second cavity 212 and the first cavity 211, accelerate the discharge rate of combustible gas in the second cavity 212, and improve the safety performance of the energy storage box 20.

[0090] Please refer to Figure 5 and Figure 6 In the above embodiment, the liquid-cooled unit 23 includes a first heat exchanger 33, a second heat exchanger 34, and a compressor 35. The second heat exchanger 34 is located between the air inlet 21a and the air outlet 21b. The first heat exchanger 33 includes a first plate 331 and a second plate 332. The compressor 35 is connected to both the first plate 331 and the second heat exchanger 34, and the second heat exchanger 34 is also connected to the first plate 331. The second plate 332 is used to connect to the liquid-cooled plate 222 and is used for heat exchange with the first plate 331.

[0091] The refrigerant in the first plate 331 absorbs heat from the coolant and vaporizes into low-temperature, low-pressure vapor. The compressor 35 compresses the refrigerant vapor from the first plate 331, increasing its pressure and temperature, transforming it into high-temperature, high-pressure vapor. The compressor 35 is connected to the second heat exchanger 34, allowing it to transfer the high-temperature, high-pressure refrigerant vapor to the second heat exchanger 34.

[0092] Because the refrigerant vapor, produced at high temperature and pressure, has high energy, it will release heat and liquefy in the second heat exchanger 34, becoming a liquid. The second heat exchanger 34 is located between the air inlet 21a and the air outlet 21b. Air enters the first cavity 211 through the air inlet 21a, comes into contact with the second heat exchanger 34, absorbs the heat generated by the refrigerant, and carries the heat out of the energy storage box 20 through the air outlet 21b.

[0093] The second heat exchanger 34 is connected to the first plate 331, and the refrigerant that has become liquid can return to the first heat exchanger 33 to continue absorbing heat from the coolant, ensuring that the coolant can continuously dissipate heat for the battery pack 221 and ensure that the battery pack 221 works normally.

[0094] Please refer to Figure 7 In the above embodiment, the housing 21 includes a first side wall 43 and a top wall 44. The top wall 44 is parallel to the partition 24, and the first side wall 43 is perpendicular to the top wall 44 and the partition 24. The first side wall 43 and the top wall 44 are arranged adjacent to each other. The air inlet 21a is arranged on the first side wall 43, and the air outlet 21b is arranged on the top wall 44. The plane where the air inlet end of the second heat exchanger 34 is located is inclined relative to the first side wall 43.

[0095] The air inlet 21a is located on the first side wall 43, and the air outlet 21b is located on the top wall 44. The plane where the air inlet of the second heat exchanger 34 is located is inclined relative to the first side wall 43, which can increase the air inlet area and air outlet area of ​​the second heat exchanger 34, thereby increasing the heat exchange area between the air and the second heat exchanger 34, improving the heat exchange rate of the second heat exchanger 34, and thus improving the heat dissipation rate of the energy storage box 20.

[0096] The embodiments of this application do not limit the first sidewall 43 and the top wall 44. For example, in some embodiments, the first sidewall 43 can be a sidewall and the top wall 44 can be a top wall; in other embodiments, the first sidewall 43 can be a sidewall and the top wall 44 can be a sidewall.

[0097] In the embodiment where the first side wall 43 is a side wall and the top wall 44 is a top wall, the air outlet 21b is located on the top wall.

[0098] Since the density of combustible gases is lower than that of air, combustible gases will float upwards when they diffuse naturally. The air outlet 21b is located on the top wall, which allows the combustible gases to gather on the top wall on their own and be discharged through the air outlet 21b. This can reduce the power consumption of the first fan 31 while ensuring the discharge rate of combustible gases.

[0099] The hot air that exchanges heat with the second heat exchanger 34 is also discharged from the energy storage box 20 through the air outlet 21b. The density of the hot air is less than that of air at normal temperature, so the hot air will automatically flow upward. The air outlet 21b is located on the top wall, which allows the hot air to gather on the top wall on its own. While ensuring the discharge rate of the hot air, the power consumption of the first fan 31 is reduced.

[0100] In energy storage system 10 ( Figure 1 As shown, it includes multiple energy storage boxes 20 spaced apart. Figure 4 In the embodiment shown, hot air flows out from the air outlet 21b on the top wall, which can prevent hot air from interfering with the adjacent energy storage box 20, prevent the adjacent energy storage box 20 from absorbing heat and causing local overheating, and ensure the stability of the energy storage system 10.

[0101] In some embodiments, there are multiple air inlets 21a, and the air inlets 21a are also provided on the top wall 44, with the air inlets 21a and air outlets 21b spaced apart. Increasing the number of air inlets 21a can accelerate the airflow and improve the heat exchange rate between the air and the second heat exchanger 34, thereby improving the heat dissipation rate of the liquid cooling unit 23.

[0102] Continue to refer to Figure 7 In the above embodiment, the air outlet valve 25 is located on the side of the second heat exchanger 34 away from the air inlet 21a.

[0103] The air outlet valve 25 is located on the side of the second heat exchanger 34 away from the air inlet 21a. When the air outlet valve 25 is open, the combustible gas can flow directly to the air outlet 21b. The second heat exchanger 34 will not obstruct the flow of the combustible gas, thus avoiding a decrease in the flow rate of the combustible gas and ensuring a high discharge rate of the combustible gas.

[0104] The number of air outlet valves 25 is not limited in this application embodiment. For example, the number of air outlet valves 25 can be one, or the number of air outlet valves 25 can be multiple. Specifically, the number of air outlet valves 25 can be two, three, etc.

[0105] Continue to refer to Figure 7 In some embodiments, the air outlet valve 25 includes a cover plate 50 and a drive structure. The cover plate 50 is connected to the partition plate 24 via the drive structure, and the drive structure is electrically connected to the control device. The air outlet valve 25 includes a closed state and an open state. When the air outlet valve 25 is in the closed state, the cover plate 50 covers the exhaust port 41; when the air outlet valve 25 is in the open state, the first cavity 211 and the second cavity 212 ( Figure 5 (As shown) is connected, and the drive structure is used to drive the cover plate 50 to slide relative to the exhaust port 41.

[0106] This application does not limit the driving structure. For example, in some embodiments, the driving structure may include an electric push rod, with a control device connected to the electric push rod. One end of the electric push rod is connected to the partition 24, and the other end is connected to the cover plate 50. After receiving the control signal from the control device, the electric push rod can convert electrical energy into kinetic energy, driving the cover plate 50 to move, causing the cover plate 50 to slide in a direction parallel to the partition 24, thus exposing the exhaust port 41. Combustible gas can then enter the first cavity 211 through the air outlet valve 25.

[0107] In other embodiments, the driving structure may include a slider, with a groove provided on the partition 24 and a slider provided on the cover 50, the slider sliding within the groove. An actuator is provided on the slider, and the actuator is connected to a control device. After receiving a control signal from the control device, the actuator can convert electrical energy into kinetic energy for the slider, causing the slider to move along the groove, and causing the cover 50 to slide in a direction parallel to the partition 24, thus exposing the exhaust port 41. Combustible gas can then enter the first cavity 211 through the exhaust valve 25.

[0108] When the air outlet valve 25 is closed, the cover plate 50 covers the exhaust port 41, preventing gas from flowing into the first chamber 211 and the second chamber 212, ensuring the normal operation of the liquid cooling unit 23. The cover plate 50 is connected to the partition plate 24 via a drive structure, and the control device is electrically connected to the drive structure. When the control device controls the drive structure, the cover plate 50 can rotate towards the air inlet 21a, allowing combustible gas to pass through the exhaust port 41 from the second chamber 212 into the first chamber 211, thereby allowing the combustible gas to be discharged from the air outlet 21b, reducing the pressure on the energy storage box 20 ( Figure 4 The total amount of combustible gas in the energy storage box 20 (as shown) is increased to improve the safety performance of the energy storage box 20.

[0109] Please refer to Figure 8 In some other embodiments, the air outlet valve 25 includes a cover plate 50 and a drive structure. The cover plate 50 is connected to the partition plate 24 through the drive structure, and the drive structure is electrically connected to the control device. The air outlet valve 25 includes a closed state and an open state. When the air outlet valve 25 is in the closed state, the cover plate 50 covers the exhaust port 41. When the air outlet valve 25 is in the open state, the cover plate 50 blocks the air inlet 21a. The drive structure is used to drive the cover plate 50 to rotate toward the air inlet 21a.

[0110] This application does not limit the driving structure. For example, in some embodiments, the driving structure may include an electric hinge. One end of the electric hinge is connected to the cover plate 50, and the other end of the electric hinge is connected to the partition plate 24. The electric hinge is connected to a control device. After the electric hinge receives a control signal from the control device, the electric hinge can convert electrical energy into kinetic energy. The electric hinge rotates, causing the cover plate 50 to rotate around the end connected to the electric hinge, thereby opening the air outlet valve 25. Combustible gas can enter the first cavity 211 through the air outlet valve 25.

[0111] In other embodiments, the drive structure may include an electric telescopic rod. One end of the cover plate 50 is fixedly connected to the partition plate 24, and one end of the electric telescopic rod is connected to the other end of the cover plate 50. The other end of the electric telescopic rod is also connected to the partition plate 24. An electric hinge is connected to a control device. After receiving a control signal from the control device, the electric telescopic rod can convert electrical energy into kinetic energy, extending or shortening the electric telescopic rod to rotate the cover plate 50, thereby opening the air outlet valve 25. Combustible gas can then enter the first cavity 211 through the air outlet valve 25.

[0112] When the air outlet valve 25 is closed, the cover plate 50 covers the exhaust port 41, which can prevent gas from entering the first chamber 211 and the second chamber 212. Figure 5 (As shown) Internal circulation ensures the normal operation of the liquid cooling unit 23. The cover plate 50 is connected to the partition plate 24 through the drive structure, and the control device is electrically connected to the drive structure. When the control device controls the drive structure, the cover plate 50 can rotate towards the air inlet 21a, so that combustible gas can enter the first chamber 211 through the exhaust port 41 from the second chamber 212, thereby allowing the combustible gas to be discharged from the air outlet 21b, reducing the total amount of combustible gas in the energy storage box 20 and improving the safety performance of the energy storage box 20.

[0113] Meanwhile, because the cover plate 50 rotates towards the air inlet 21a, and when the air outlet valve 25 is open, the cover plate 50 blocks the air inlet 21a, preventing combustible gas from flowing from the exhaust port 41 to the air inlet 21a. The cover plate 50 ensures that combustible gas flows from the exhaust port 41 to the air outlet 21b, improving the accuracy of the combustible gas flow path and preventing combustible gas from accumulating at the air inlet 21a, thus avoiding risks to inspection personnel or other equipment.

[0114] Please refer to Figure 9In some embodiments, the air inlet 21a includes a first air inlet 45 and a second air inlet 46. The housing 21 also includes a second side wall 47, which is parallel to and opposite to the first side wall 43. The second side wall 47 is adjacent to the top wall 44. The first air inlet 45 is disposed on the first side wall 43, and the second air inlet 46 is disposed on the second side wall 47. The second heat exchanger 34 includes a first sub-heat exchanger 341 and a second sub-heat exchanger 342, which are spaced apart. The air inlet surface of the first sub-heat exchanger 341 faces the first air inlet 45, and the air outlet surface of the first sub-heat exchanger 341 faces the air outlet 21b. The air inlet surface of the second sub-heat exchanger 342 faces the second air inlet 46, and the air outlet surface of the second sub-heat exchanger 342 faces the air outlet 21b.

[0115] Air inlet 21a includes a first air inlet 45 and a second air inlet 46. Air can enter the first cavity 211 through the first air inlet 45 or the second air inlet 46. The increased airflow of the liquid-cooled unit 23 per unit time can accelerate the heat exchange rate between the air and the second heat exchanger 34, thereby improving the efficiency of the energy storage tank 20. Figure 4 The heat dissipation rate (as shown in the figure). The first air inlet 45 and the second air inlet 46 are arranged opposite each other, which can avoid uneven airflow distribution in the first cavity 211, avoid excessive local temperature, and ensure the cooling effect of the second heat exchanger 34.

[0116] The air inlet surface of the first sub-heat exchanger 341 faces the first air inlet 45, and the air outlet surface of the first sub-heat exchanger 341 faces the air outlet 21b. The air inlet surface of the second sub-heat exchanger 342 faces the second air inlet 46, and the air outlet surface of the second sub-heat exchanger 342 faces the air outlet 21b. Air can enter through the first air inlet 45, exchange heat with the first sub-heat exchanger 341, and then leave through the air outlet 21b. Air can also enter through the second air inlet 46, exchange heat with the second sub-heat exchanger 342, and then leave through the air outlet 21b.

[0117] The second heat exchanger 34 includes a first sub-heat exchanger 341 and a second sub-heat exchanger 342. The heat exchange area of ​​the second heat exchanger 34 is increased, which can improve the heat exchange rate between the second heat exchanger 34 and the air, thereby improving the heat dissipation rate of the energy storage box 20.

[0118] Continue to refer to Figure 9 In some embodiments, the exhaust port 41 includes a first hole 411 and a second hole 412, which are spaced apart. The air outlet valve 25 includes a first air valve 61 and a second air valve 62, with the first air valve 61 disposed in the first hole 411 and the second air valve 62 disposed in the second hole 412.

[0119] The air outlet valve 25 includes a first air valve 61 and a second air valve 62. The number of air outlet valves 25 increases. When the air outlet valve 25 is opened, the total amount of combustible gas flowing from the second cavity 212 to the first cavity 211 per unit time increases, which can further improve the discharge rate of combustible gas and improve the safety performance of the energy storage box 20.

[0120] Continue to refer to Figure 9 In some embodiments, the first air valve 61 is disposed on the side of the first sub-heat exchanger 341 near the first air inlet 45, and the second air valve 62 is disposed on the side of the second sub-heat exchanger 342 near the second air inlet 46.

[0121] The gap between the first air inlet 45 and the first sub-heat exchanger 341 is relatively large. The first air valve 61 is positioned on the side of the first sub-heat exchanger 341 closest to the first air inlet 45, ensuring a large ventilation area and a high total amount of combustible gas passing through it per unit time, thus guaranteeing a high combustible gas discharge rate. Similarly, the gap between the second air inlet 46 and the second sub-heat exchanger 342 is also relatively large. The second air valve 62 is positioned on the side of the second sub-heat exchanger 342 closest to the second air inlet 46, ensuring a large ventilation area and a high total amount of combustible gas passing through it per unit time, thus guaranteeing a high combustible gas discharge rate.

[0122] Continue to refer to Figure 9 In some embodiments, the cover plate 50 includes a first cover plate 51 and a second cover plate 52, and the driving structure includes a first driving structure and a second driving structure. The first air valve 61 includes a first cover plate 51 and a first driving structure. The first cover plate 51 is connected to the partition plate 24 through the first driving structure, and the first driving structure is electrically connected to the control device. The first air valve 61 includes a closed state and an open state. When the first air valve 61 is in the closed state, the first cover plate 51 covers the first hole 411. When the first air valve 61 is in the open state, the first cavity 211 and the second cavity 212 are connected. The first driving structure is used to drive the first cover plate 51 to slide relative to the first hole 411.

[0123] The second air valve 62 includes a second cover plate 52 and a second drive structure. The second cover plate 52 is connected to the partition plate 24 through the second drive structure. The second drive structure is electrically connected to the control device. The second air valve includes a closed state and an open state. When the second air valve 62 is in the open state, the second cover plate 52 covers the second hole 412. When the second air valve 62 is in the open state, the first cavity 211 and the second cavity 212 are connected. The second drive structure is used to drive the second cover plate 52 to slide relative to the second hole 412.

[0124] The embodiments of this application do not limit the first driving structure and the second driving structure. The first driving structure and the second driving structure are similar to the driving structures described above, and will not be repeated here.

[0125] The control device is connected to the first drive structure and the second drive structure. The control device can send control signals to the first drive structure and the second drive structure to control the opening and closing of the first air valve 61 and the second air valve 62.

[0126] When the first air valve 61 and the second air valve 62 are in the closed state, the first cover plate 51 covers the first hole 411 and the second cover plate 52 covers the second hole 412, which can prevent gas from entering the first cavity 211 and the second cavity 212. Figure 5 (As shown) The flow within the liquid cooling unit 23 is ensured to operate normally. When the first air valve 61 and the second air valve 62 are open, the first cover plate 51 slides relative to the first hole 411, and the second cover plate 52 slides relative to the second hole 412, exposing the first hole 411 and the second hole 412. Combustible gas can pass through the first hole 411 and the second hole 412 and flow into the first cavity 211, thereby allowing the combustible gas to be discharged from the air outlet 21b, reducing the pressure on the energy storage box 20 (as shown). Figure 4 The total amount of combustible gas in the energy storage box 20 (as shown) is increased to improve the safety performance of the energy storage box 20.

[0127] Please refer to Figure 10 In some embodiments, the first air valve 61 includes a first cover plate 51 and a first driving structure. The first cover plate 51 is connected to the partition plate 24 through the first driving structure. The first driving structure is electrically connected to the control device. The first air valve 61 includes a closed state and an open state. When the first air valve 61 is in the closed state, the first cover plate 51 covers the first hole 411. When the first air valve 61 is in the open state, the first cover plate 51 blocks the first air inlet 45. The first driving structure is used to drive the first cover plate 51 to rotate toward the first air inlet 45.

[0128] The second air valve 62 includes a second cover plate 52 and a second drive structure. The second cover plate 52 is connected to the partition plate 24 through the second drive structure. The second drive structure is electrically connected to the control device. The second air valve 62 includes a closed state and an open state. When the second air valve 62 is in the closed state, the second cover plate 52 covers the first hole 411. When the second air valve 62 is in the open state, the second cover plate 52 blocks the second air inlet 46. The second drive structure is used to drive the second cover plate 52 to rotate toward the direction closer to the second air inlet 46.

[0129] The embodiments of this application do not limit the first driving structure and the second driving structure. The first driving structure and the second driving structure are similar to the driving structures described above, and will not be repeated here.

[0130] The control device is connected to the first drive structure and the second drive structure. The control device can send control signals to the first drive structure and the second drive structure to control the opening and closing of the first air valve 61 and the second air valve 62.

[0131] When the first air valve 61 and the second air valve 62 are in the open state, the first cover plate 51 rotates relative to the first hole 411, and the second cover plate 52 rotates relative to the second hole 412, exposing the first hole 411 and the second hole 412. Combustible gas can then pass through the first hole 411 and the second hole 412 and flow into the first cavity 211, thereby allowing the combustible gas to be discharged from the air outlet 21b, reducing the pressure on the energy storage box 20. Figure 4 The total amount of combustible gas in the energy storage tank 20 (as shown) is reduced, improving the safety performance of the energy storage tank 20. When the first air valve 61 and the second air valve 62 are closed, the first cover plate 51 covers the first hole 411, and the second cover plate 52 covers the second hole 412, which can prevent gas from entering the first cavity 211 and the second cavity 212 (as shown). Figure 5 (As shown) Internal circulation ensures normal operation of the liquid cooling unit 23.

[0132] Simultaneously, when the first air valve 61 and the second air valve 62 are in the open state, the first cover plate 51 rotates towards the first air inlet 45, covering the first air inlet 45 and preventing combustible gas from being discharged from it. The second cover plate 52 rotates towards the second air inlet 46, covering it and preventing combustible gas from being discharged from it. The first cover plate 51 and the second cover plate 52 ensure that combustible gas flows from the exhaust port 41 to the air outlet 21b, improving the accuracy of the combustible gas flow path and preventing the accumulation of combustible gas in the first air inlet 45 and the second air inlet 46, thus avoiding risks to inspection personnel or other equipment.

[0133] Please refer to Figure 11 In some embodiments, the first air valve 61 is disposed on the side of the first sub-heat exchanger 341 away from the first air inlet 45, and the second air valve 62 is disposed on the side of the second sub-heat exchanger 342 away from the second air inlet 46.

[0134] When the first air valve 61 and the second air valve 62 are opened, combustible gas can enter the first cavity 211 through the first air valve 61 and the second air valve 62, and leave the energy storage box 20 directly through the air outlet 21b. Figure 4 As shown, this prevents combustible gas from passing through the first sub-heat exchanger 341 and the second sub-heat exchanger 342, which would reduce the flow rate of the combustible gas, ensure a high flow rate of the gas that can be contained, and guarantee the discharge rate of the combustible gas, thereby ensuring a high safety performance of the energy storage box 20.

[0135] Continue to refer to Figure 11In some embodiments, the cover plate 50 includes a first cover plate 51 and a second cover plate 52, and the driving structure includes a first driving structure and a second driving structure. The first air valve 61 includes a first cover plate 51 and a first driving structure. The first cover plate 51 is connected to the partition plate 24 through the first driving structure, and the first driving structure is electrically connected to the control device. The first air valve 61 includes a closed state and an open state. When the first air valve 61 is in the closed state, the first cover plate 51 covers the first hole 411. When the first air valve 61 is in the open state, the first cavity 211 and the second cavity 212 are connected. The first driving structure is used to drive the first cover plate 51 to slide relative to the first hole 411.

[0136] The second air valve 62 includes a second cover plate 52 and a second drive structure. The second cover plate 52 is connected to the partition plate 24 through the second drive structure. The second drive structure is electrically connected to the control device. The second air valve includes a closed state and an open state. When the second air valve 62 is in the open state, the second cover plate 52 covers the second hole 412. When the second air valve 62 is in the open state, the first cavity 211 and the second cavity 212 are connected. The second drive structure is used to drive the second cover plate 52 to slide relative to the second hole 412.

[0137] The embodiments of this application do not limit the first driving structure and the second driving structure. The first driving structure and the second driving structure are similar to the driving structures described above, and will not be repeated here.

[0138] The control device is connected to the first drive structure and the second drive structure. The control device can send control signals to the first drive structure and the second drive structure to control the opening and closing of the first air valve 61 and the second air valve 62.

[0139] When the first air valve 61 and the second air valve 62 are in the closed state, the first cover plate 51 covers the first hole 411 and the second cover plate 52 covers the second hole 412, which can prevent gas from entering the first cavity 211 and the second cavity 212. Figure 5 (As shown) The flow within the liquid cooling unit 23 is ensured to operate normally. When the first air valve 61 and the second air valve 62 are open, the first cover plate 51 slides relative to the first hole 411, and the second cover plate 52 slides relative to the second hole 412, exposing the first hole 411 and the second hole 412. Combustible gas can pass through the first hole 411 and the second hole 412 and flow into the first cavity 211, thereby allowing the combustible gas to be discharged from the air outlet 21b, reducing the pressure on the energy storage box 20 (as shown). Figure 4 The total amount of combustible gas in the energy storage box 20 (as shown) is increased to improve the safety performance of the energy storage box 20.

[0140] Please refer to Figure 12In some embodiments, the first air valve 61 includes a first cover plate 51 and a first driving structure. The first cover plate 51 is connected to the partition plate 24 through the first driving structure. The first driving structure is electrically connected to the control device. The first air valve 61 includes a closed state and an open state. When the first air valve 61 is in the closed state, the first cover plate 51 covers the first hole 411. When the first air valve 61 is in the open state, the first cover plate 51 abuts against the first sub-heat exchanger 341, so that the first cover plate 51 blocks the first air inlet 45. The first driving structure is used to drive the first cover plate 51 to rotate toward the direction closer to the first air inlet 45.

[0141] The second air valve 62 includes a second cover plate 52 and a second drive structure. The second cover plate 52 is connected to the partition plate 24 through the second drive structure. The second drive structure is electrically connected to the control device. The second air valve 62 includes a closed state and an open state. When the second air valve 62 is in the closed state, the second cover plate 52 covers the first hole 411. When the second air valve 62 is in the open state, the second cover plate 52 abuts against the second sub-heat exchanger 342, so that the second cover plate 52 blocks the second air inlet 46. The second drive structure is used to drive the second cover plate 52 to rotate toward the direction closer to the second air inlet 46.

[0142] The embodiments of this application do not limit the first driving structure and the second driving structure. The first driving structure and the second driving structure are similar to the driving structures described above, and will not be repeated here.

[0143] The control device is connected to the first drive structure and the second drive structure. The control device can send control signals to the first drive structure and the second drive structure to control the opening and closing of the first air valve 61 and the second air valve 62.

[0144] When the first air valve 61 and the second air valve 62 are in the open state, the first cover plate 51 rotates relative to the first hole 411, and the second cover plate 52 rotates relative to the second hole 412, exposing the first hole 411 and the second hole 412. Combustible gas can then pass through the first hole 411 and the second hole 412 and flow into the first cavity 211, thereby allowing the combustible gas to be discharged from the air outlet 21b, reducing the pressure on the energy storage box 20. Figure 4 The total amount of combustible gas in the energy storage tank 20 (as shown) is reduced, improving the safety performance of the energy storage tank 20. When the first air valve 61 and the second air valve 62 are closed, the first cover plate 51 covers the first hole 411, and the second cover plate 52 covers the second hole 412, which can prevent gas from entering the first cavity 211 and the second cavity 212 (as shown). Figure 5 (As shown) Internal circulation ensures normal operation of the liquid cooling unit 23.

[0145] Simultaneously, when the first air valve 61 and the second air valve 62 are in the open state, the first cover plate 51 rotates towards the first air inlet 45, and the first cover plate 51 can abut against the first sub-heat exchanger 341, thus blocking the first air inlet 45 and preventing combustible gas from being discharged from the first air inlet 45. The second cover plate 52 rotates towards the second air inlet 46, and the second cover plate 52 can abut against the second sub-heat exchanger 342, thus blocking the second air inlet 46 and preventing combustible gas from being discharged from the second air inlet 46. The first cover plate 51 and the second cover plate 52 can ensure that combustible gas flows from the exhaust port 41 to the air outlet 21b, improving the accuracy of the combustible gas flow path and preventing combustible gas from accumulating in the first air inlet 45 and the second air inlet 46, thus avoiding risks to inspection personnel or other equipment.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage box, characterized in that, include: Box; An energy storage module is disposed inside the enclosure; The liquid-cooled unit has a partition inside the housing, which divides the housing into a first cavity and a second cavity. The liquid-cooled unit is installed in the first cavity, and the energy storage module is installed in the second cavity. The liquid cooling unit includes a first fan, and the housing is provided with an air inlet and an air outlet, with the first fan located at the air outlet; An air outlet valve and a control device are provided. An exhaust port is provided on the partition and is connected to the air outlet. The air outlet valve is located at the exhaust port. The control device is connected to the air outlet valve. The control device is used to control the air outlet valve to open when the concentration of combustible gas in the second cavity is greater than or equal to a first threshold.

2. The energy storage box according to claim 1, characterized in that, The energy storage box also includes an air inlet valve. An air inlet is provided on the box body. The air inlet is connected to the second cavity and the air inlet is connected to the exhaust port. The air inlet valve is located at the air inlet. The control device is connected to the air inlet valve. The control device is also used to control the air inlet valve to open when the concentration of combustible gas in the second cavity is greater than or equal to the first threshold.

3. The energy storage box according to claim 1 or 2, characterized in that, The air outlet valve includes a valve body and a second fan. The valve body is located at the exhaust port, and the air inlet of the second fan faces the second cavity.

4. The energy storage box according to claim 1 or 2, characterized in that, The liquid-cooled unit includes a first heat exchanger, a second heat exchanger, and a compressor. The air inlet surface of the second heat exchanger faces the air inlet, and the air outlet surface of the second heat exchanger faces the air outlet. The first heat exchanger includes a first plate and a second plate. The compressor is connected to both the first plate and the second heat exchanger, and the second heat exchanger is also connected to the first plate. The second plate is used to connect to the liquid-cooled plate of the energy storage module, and the second plate is used to exchange heat with the first plate.

5. The energy storage box according to claim 4, characterized in that, The housing includes a first side wall and a top wall. The top wall is parallel to the partition, and the first side wall is perpendicular to the top wall and the partition. The first side wall and the top wall are arranged adjacent to each other. The air inlet is arranged on the first side wall, and the air outlet is arranged on the top wall. The plane where the air inlet of the second heat exchanger is located is inclined relative to the first side wall.

6. The energy storage box according to claim 5, characterized in that, The air outlet valve is located on the side of the second heat exchanger near the air outlet.

7. The energy storage box according to claim 5, characterized in that, The air inlet includes a first air inlet and a second air inlet. The housing also includes a second side wall, which is parallel to and opposite to the first side wall. The second side wall is adjacent to the top wall. The first air inlet is located on the first side wall, and the second air inlet is located on the second side wall. The second heat exchanger includes a first sub-heat exchanger and a second sub-heat exchanger, which are arranged at intervals. The air inlet surface of the first sub-heat exchanger faces the first air inlet, and the air outlet surface of the first sub-heat exchanger faces the air outlet. The air inlet surface of the second sub-heat exchanger faces the second air inlet, and the air outlet surface of the second sub-heat exchanger faces the air outlet.

8. The energy storage box according to claim 7, characterized in that, The exhaust port includes a first hole and a second hole, which are spaced apart. The air outlet valve includes a first air valve and a second air valve, with the first air valve located in the first hole and the second air valve located in the second hole.

9. The energy storage box according to claim 8, characterized in that, The first air valve is located on the side of the first sub-heat exchanger away from the first air inlet, and the second air valve is located on the side of the second sub-heat exchanger away from the second air inlet.

10. The energy storage box according to claim 8, characterized in that, The first air valve is located on the side of the first sub-heat exchanger near the first air inlet, and the second air valve is located on the side of the second sub-heat exchanger near the second air inlet.

11. The energy storage box according to claim 4, characterized in that, The air outlet valve includes a cover plate and a drive structure. The cover plate is connected to the partition plate through the drive structure. The control device is electrically connected to the drive structure. The air outlet valve includes a closed state and an open state. When the air outlet valve is in the closed state, the cover plate covers the exhaust port. When the air outlet valve is in the open state, the cover plate blocks the air inlet, and the drive structure is used to drive the cover plate to rotate in a direction closer to the air inlet.

12. The energy storage box according to claim 4, characterized in that, The air outlet valve includes a cover plate and a drive structure. The cover plate is connected to the partition plate through the drive structure. The control device is electrically connected to the drive structure. The air outlet valve includes a closed state and an open state. When the air outlet valve is in the closed state, the cover plate covers the exhaust port. When the air outlet valve is in the open state, the first cavity and the second cavity are connected, and the driving structure is used to drive the cover plate to slide relative to the exhaust port.

13. An energy storage system, characterized in that, The device includes a plurality of energy storage boxes as described in any one of claims 1-12, spaced apart, and the plurality of energy storage boxes are arranged in an array.

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