Energy storage cabinet with high safety

Abstract

The utility model discloses an energy storage cabinet with high safety. The energy storage cabinet comprises a cabinet body with an internal space and at least one battery module arranged in the cabinet body, each battery module is provided with a first anti-explosion valve, and the first anti-explosion valves are used for selectively communicating the interiors of the battery modules with the internal space of the cabinet body; the cabinet body is provided with a second anti-explosion valve, the second anti-explosion valve is used for selectively communicating the internal space and the external space of the cabinet body, and the air outlet of each first anti-explosion valve faces the second anti-explosion valve. The energy storage cabinet has the beneficial effects that the large-area diffusion of gas exhausted from the interior of the battery module in the energy storage cabinet can be reduced, so that the damage of the gas to other electrical components is reduced.

Description

Technical Field

[0001] This utility model relates to a highly secure energy storage cabinet, belonging to the field of energy storage technology. Background Technology

[0002] During use, overcharging, over-discharging, internal short circuits, or other abnormal conditions can occur in energy storage cabinets, potentially leading to thermal runaway. Thermal runaway causes a rapid increase in the internal temperature of the battery, generating a large amount of gas and rapidly increasing the internal pressure. To ensure battery safety, an explosion-proof valve is installed on the battery casing, which monitors the internal pressure changes in real time. Once the internal pressure exceeds a set threshold, the explosion-proof valve automatically opens to release the accumulated pressure, ensuring battery safety. Simultaneously, to prevent explosions caused by excessive gas pressure inside the energy storage cabinet, an explosion-proof valve is also installed. During use, gas emitted from the battery first enters and diffuses within the energy storage cabinet. When the accumulated gas pressure reaches the opening threshold of the explosion-proof valve, it opens to release the gas. However, the gas emitted from the battery is a high-temperature, high-pressure gas, and its widespread diffusion within the energy storage cabinet can easily damage other electrical components. Utility Model Content

[0003] The purpose of this invention is to provide a highly safe energy storage cabinet that can reduce the large-area diffusion of gas emitted from inside the battery module within the cabinet, thereby reducing its damage to other electrical components.

[0004] This utility model is achieved through the following technical solution.

[0005] A high-safety energy storage cabinet includes a cabinet with internal space and at least one battery module disposed within the cabinet. Each battery module is provided with a first explosion-proof valve, which is used to selectively connect the interior of the battery module with the internal space of the cabinet. The cabinet is provided with a second explosion-proof valve, which is used to selectively connect the internal space of the cabinet with the external space, and the outlet of each first explosion-proof valve is directed toward the second explosion-proof valve.

[0006] As a further improvement of this utility model, the opening threshold of the first explosion-proof valve is less than the opening threshold of the second explosion-proof valve.

[0007] As a further improvement of this utility model, the cabinet includes a cabinet body and two cabinet doors, which are respectively openable and closable on opposite sides of the cabinet body.

[0008] As a further improvement of this utility model, the first explosion-proof valve is disposed facing one of the cabinet doors, and the second explosion-proof valve is disposed on the cabinet door facing the first explosion-proof valve.

[0009] As a further improvement of this utility model, the cabinet has an independent battery compartment, electrical compartment and liquid cooling compartment inside; the cabinet is provided with a first partition and a second partition, which are used to divide the internal space of the cabinet into the battery compartment, the electrical compartment and the liquid cooling compartment.

[0010] As a further improvement of this utility model, the battery compartment, the electrical compartment, and the liquid cooling compartment are arranged sequentially from top to bottom. As a further improvement of this utility model,

[0011] As a further improvement of this utility model, the liquid cooling chamber is provided with a liquid cooling unit, which includes a liquid cooler and liquid cooling pipes connected to the liquid cooler for contacting the surface of the battery module to dissipate heat from the battery module.

[0012] As a further improvement of this utility model, a fan is provided on the cabinet corresponding to the position of the electrical room.

[0013] As a further improvement of this utility model, a detection unit is provided inside the cabinet for detecting the fire status of the battery module.

[0014] As a further improvement of this utility model, the battery module is provided with at least one fire extinguishing pipe that connects to the inside of the battery module, for spraying fire extinguishing medium into the battery module.

[0015] The beneficial effects of this utility model are:

[0016] 1. The first explosion-proof valve can directly monitor and respond to pressure changes inside the battery module. When the internal pressure of the battery module rises abnormally, the first explosion-proof valve will quickly open to release the gas inside the battery module, ensuring the safety of the battery module. The second explosion-proof valve is installed on the energy storage cabinet to ensure that the internal pressure of the energy storage cabinet can be effectively released in the event of excessively high pressure, preventing the energy storage cabinet from exploding. At the same time, the outlet of the first explosion-proof valve is set towards the second explosion-proof valve. When the second explosion-proof valve opens, the gas discharged from the first explosion-proof valve can be quickly discharged to the outside of the energy storage cabinet through the second explosion-proof valve. This improves the efficiency of pressure release, further enhancing the safety of the energy storage cabinet, and also reduces the diffusion of the high-temperature and high-pressure gas discharged from the first explosion-proof valve inside the energy storage cabinet, thereby reducing its damage to other electrical components inside the energy storage cabinet.

[0017] 2. The opening threshold of the first explosion-proof valve is lower than that of the second explosion-proof valve. Therefore, when the pressure inside the battery module increases, the first explosion-proof valve on the battery module will respond first and quickly release the internal pressure to prevent the battery module from exploding. If the abnormal situation inside the battery module is not controlled in time, causing the pressure inside the energy storage cabinet to rise abnormally, the second explosion-proof valve will open to further release the pressure as a second line of defense and ensure the safety of the entire system. Attached Figure Description

[0018] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0019] Figure 1 This is a structural schematic diagram of a high-safety energy storage cabinet according to the present invention;

[0020] Figure 2 This is a structural schematic diagram of a high-safety energy storage cabinet according to this utility model from one perspective.

[0021] Figure 3 Structural diagram of the cabinet;

[0022] Figure 4 This is a structural diagram of the main body of the cabinet. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0025] This embodiment provides a highly secure energy storage cabinet, referring to... Figures 1-4 The device includes a cabinet 1 with internal space and at least one battery module 2 installed inside the cabinet 1. Each battery module 2 is provided with a first explosion-proof valve 3, which is used to selectively connect the interior of the battery module 2 and the internal space of the cabinet 1. The cabinet 1 is provided with a second explosion-proof valve 4, which is used to selectively connect the internal space of the cabinet 1 and the external space. The vent of each first explosion-proof valve 3 is oriented towards the second explosion-proof valve 4.

[0026] In this embodiment, the first explosion-proof valve 3 can directly monitor and respond to pressure changes inside the battery module 2. Once the internal pressure of the battery module 2 rises abnormally, the first explosion-proof valve 3 will quickly open to release the gas inside the battery module 2, ensuring the safety of the battery module 2. The second explosion-proof valve 4 is installed on the energy storage cabinet to ensure that the internal pressure of the energy storage cabinet can be effectively released when it accumulates to a certain level, preventing the energy storage cabinet from exploding and achieving dual protection. At the same time, since the outlet of the first explosion-proof valve 3 is set towards the second explosion-proof valve 4, when the second explosion-proof valve 4 is opened, the gas discharged from the first explosion-proof valve 3 can be quickly discharged outside the energy storage cabinet through the second explosion-proof valve 4, without spreading over a large area inside the energy storage cabinet. On the one hand, this can improve the efficiency of pressure release and further improve the safety of the energy storage cabinet. On the other hand, it can reduce the diffusion of the high-temperature and high-pressure gas discharged from the first explosion-proof valve 3 inside the cabinet 1, thereby reducing its damage to other electrical components inside the energy storage cabinet 1.

[0027] In this embodiment, the opening threshold of the first explosion-proof valve 3 is lower than that of the second explosion-proof valve 4. Therefore, when the pressure inside the battery module 2 increases, the first explosion-proof valve 3 on the battery module 2 will respond first, quickly releasing its internal pressure to prevent the battery module 2 from exploding. If the abnormal situation inside the battery module 2 is not controlled in time, causing an abnormal increase in pressure inside the energy storage cabinet, the second explosion-proof valve 4 will then open, acting as a second line of defense to further release pressure and ensure the safety of the entire system. Meanwhile, as a complex system containing multiple electrical components, the internal pressure of the energy storage cabinet may be affected by various factors. A higher opening threshold can reduce the false triggering of the second explosion-proof valve 4 due to non-abnormal situations (such as pressure fluctuations during normal operation), improving the stability and reliability of the system.

[0028] It should be noted that the opening threshold of the explosion-proof valve mentioned above refers to the critical pressure value at which the explosion-proof valve suddenly opens and releases internal gas after being subjected to a certain pressure. This value determines when the explosion-proof valve will activate.

[0029] In this embodiment, the cabinet 1 includes a main body 11 and two cabinet doors 12. The two cabinet doors 12 are respectively openable and closable on opposite sides of the main body 11, specifically, the two cabinet doors 12 are installed on the front and rear sides of the main body 11. When installing and maintaining the battery module 2, operators can operate the battery module 2 from the front and rear sides of the main body 11, which is not only convenient but also highly flexible. Furthermore, the first explosion-proof valve 3 is positioned facing one of the cabinet doors 12, and the second explosion-proof valve 4 is positioned on the cabinet door 12 facing the first explosion-proof valve 3, facilitating the maintenance of both the first and second explosion-proof valves 3 and 4.

[0030] In this embodiment, the cabinet 1 has independent battery compartment 5, electrical compartment 6, and liquid cooling compartment 7. Battery compartment 5 is used to install battery module 2, electrical compartment 6 is used to install electrical components such as PCS module and high voltage box, and liquid cooling compartment 7 is used to install liquid cooling unit 8. Furthermore, the cabinet 1 is provided with a first partition 13 and a second partition 14, which are used to divide the internal space of the cabinet 1 into battery compartment 5, electrical compartment 6, and liquid cooling compartment 7. Therefore, battery compartment 5, electrical compartment 6, and liquid cooling compartment 7 are independent, which on the one hand prevents the sparks and arcs generated when the electrical components are working from causing a fire in battery module 2, ensuring the safe operation of battery module 2, and on the other hand facilitates maintenance personnel to inspect and maintain each part.

[0031] Meanwhile, the battery compartment 5, electrical compartment 6, and liquid cooling compartment 7 are arranged sequentially from top to bottom. This arrangement makes the overall structure of the energy storage cabinet more compact and improves space utilization. Furthermore, the liquid cooling compartment 7 is located below the battery compartment 5 and electrical compartment 6, which can prevent leakage from the liquid cooler 81 inside the liquid cooling compartment 7 from damaging the equipment inside the battery compartment 5 and electrical compartment 6.

[0032] In this embodiment, multiple fans 15 are provided on the cabinet 1 at the position corresponding to the electrical compartment 6. The fans 15 can exhaust the heat generated by the electrical components in the corresponding electrical compartment 6 to the outside of the cabinet 1, preventing the temperature inside the cabinet 1 from becoming too high. Specifically, the multiple fans 15 are located on the cabinet door on the rear side of the cabinet 1.

[0033] In this embodiment, the liquid cooling unit 8 includes a liquid cooler 81 and a liquid cooling pipe 82 connected to the liquid cooler 81 for contacting the surface of the battery module 2 to dissipate heat from the battery module 2. The two ends of the liquid cooling pipe 82 are connected to the liquid cooler 81. The liquid cooler 81 is used to deliver refrigerant into the liquid cooling pipe 82. The arrangement of the liquid cooling pipe 82 can contact the outer shell of the battery module 2, thereby achieving heat dissipation of the battery module 2. The heat dissipation of the battery module 2 is achieved by liquid cooling, which has high heat dissipation efficiency.

[0034] In this embodiment, a detection unit is installed inside the cabinet 1 to detect the fire status of the battery module 2. This detection unit can be a temperature sensor or a smoke sensor. The detection unit is located on the top surface of the cabinet 1 corresponding to the battery compartment 5, and its position is relatively close to the battery module 2. Therefore, when the battery module 2 catches fire, the detection unit can quickly detect the fire. Furthermore, an alarm is also installed on the energy storage cabinet, electrically connected to the detection unit. When the detection unit detects a fire in the battery module 2, the alarm sounds to alert personnel.

[0035] In this embodiment, the battery module 2 is equipped with at least one fire extinguishing pipe 9 that connects to the interior of the battery module 2. This pipe is used to spray fire extinguishing medium into the interior of the battery module 2. When the battery module 2 catches fire, the fire extinguishing medium can be directly sprayed into the interior of the battery module 2 to quickly extinguish the fire and prevent its spread. More specifically, one end of the fire extinguishing pipe 9 connects to the interior of the battery module 2, and the other end connects to a fire tank containing perfluorohexanone. The perfluorohexanone is sprayed into the interior of the battery module 2 through the fire extinguishing pipe 9 via the fire tank, thereby extinguishing the fire in the battery module 2. The fire tank is installed inside the energy storage cabinet to increase the reliability of the energy storage system.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such 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 utility model.

Claims

1. A high safety energy storage cabinet, characterized in that, The application relates to a cabinet body (1) with an internal accommodating space, at least one battery module (2) arranged in the cabinet body (1), a first explosion-proof valve (3) arranged on each battery module (2) and used for selectively connecting the interior of the battery module (2) with the internal space of the cabinet body (1), a second explosion-proof valve (4) arranged on the cabinet body (1) and used for selectively connecting the internal space of the cabinet body (1) with the external space, and a gas outlet of each first explosion-proof valve (3) is arranged towards the second explosion-proof valve (4).

2. The energy storage cabinet of claim 1, wherein, The opening threshold of the first explosion-proof valve (3) is smaller than that of the second explosion-proof valve (4).

3. The energy storage cabinet with high safety according to claim 1 or 2, characterized in that, The cabinet body (1) comprises a cabinet body main part (11) and two cabinet doors (12), and the two cabinet doors (12) are respectively arranged on the opposite sides of the cabinet body main part (11) in an openable and closable mode.

4. The energy storage cabinet of claim 3, wherein, The first explosion-proof valve (3) is arranged towards one of the cabinet doors (12), and the second explosion-proof valve (4) is arranged on the cabinet door (12) towards which the first explosion-proof valve (3) is arranged.

5. The energy storage cabinet of claim 1, wherein, The internal space of the cabinet body (1) comprises an independent battery chamber (5), an electrical chamber (6) and a liquid cooling chamber (7), and the cabinet body (1) is provided with a first partition plate (13) and a second partition plate (14) for separating the internal space of the cabinet body (1) into the battery chamber (5), the electrical chamber (6) and the liquid cooling chamber (7).

6. The energy storage cabinet of claim 5, wherein, The battery chamber (5), the electrical chamber (6) and the liquid cooling chamber (7) are arranged in sequence from top to bottom.

7. The energy storage cabinet of claim 5, wherein, The liquid cooling chamber (7) is provided with a liquid cooling unit (8), and the liquid cooling unit comprises a liquid cooling machine (81) and a liquid cooling pipeline (82) connected to the liquid cooling machine (81) and used for contacting the surface of the battery module (2) to dissipate heat of the battery module (2).

8. The energy storage cabinet of claim 5, wherein, A fan (15) is arranged on the cabinet body (1) at a position corresponding to the electrical chamber (6).

9. The energy storage cabinet of claim 1, wherein, A detection unit is arranged in the cabinet body (1) and used for detecting the fire state of the battery module (2).

10. The energy storage cabinet of claim 1, wherein, At least one fire extinguishing pipeline (9) is arranged on the battery module (2) and used for spraying fire extinguishing medium into the battery module (2).

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