Energy storage container

Abstract

The utility model relates to the field of energy storage, and discloses an energy storage container which comprises a container body and a plurality of battery packs, the container body is provided with an outer wall and a partition wall, the partition wall is connected with the outer wall and divides a cavity defined by the outer wall into an energy storage cavity and a pressure relief cavity which are mutually sealed and isolated, the pressure relief cavity is located on the side face of the energy storage cavity, and the battery packs are contained in the energy storage cavity. Each battery pack comprises a pressure release valve which is communicated with the interior of the battery pack and the pressure release cavity, so that structures such as pipelines are not required to be arranged in the pressure release cavity to be communicated with the interior of the battery pack to release pressure of the battery pack, on one hand, the arrangement of the pipelines is reduced, the structure of the energy storage container can be simplified, and the arrangement cost is reduced; and on the other hand, the space, occupied by the pipeline, of the pressure relief cavity is reduced, and the size of the pressure relief cavity can be set to be compact so that the structure of the energy storage container can be compact.

Description

Technical Field

[0001] The utility model relates to the field of energy storage, in particular to an energy storage container. Background Art

[0002] In recent years, as the advantages of electrochemical energy storage have become more and more obvious, electrochemical energy storage systems such as energy storage containers have become one of the mainstream solutions for energy storage systems. In addition to the explosion-proof and pressure relief requirements for battery packs, electrochemical energy storage systems also have corresponding explosion-proof and pressure relief requirements. In existing energy storage containers, the explosion-proof and pressure relief structure is set, resulting in a complex and non-compact structure of the energy storage container. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an energy storage container in order to overcome the defects of the energy storage container in the prior art that the structure is complex and not compact.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] An energy storage container, comprising:

[0006] A box body, comprising an outer wall and a partition wall, wherein the partition wall is connected to the outer wall and divides the cavity defined by the outer wall into an energy storage cavity and a pressure relief cavity which are sealed and isolated from each other, and the pressure relief cavity is located on the side of the energy storage cavity;

[0007] A plurality of battery packs are accommodated in the energy storage cavity, and each of the battery packs includes a pressure relief valve, which communicates the interior of the battery pack with the pressure relief cavity.

[0008] In this solution, the inside of the battery pack is connected to the pressure relief chamber through a pressure relief valve to relieve the pressure of the battery pack. The pressure relief chamber and the energy storage chamber are sealed and isolated, which can prevent the thermal runaway of a single battery pack from affecting the operation of other battery packs, and improve the safety and reliability of the operation of the energy storage container.

[0009] The interiors of multiple battery packs are connected to the pressure relief chamber through pressure relief valves respectively, and there is no need to set pipes or other structures in the pressure relief chamber to connect to the interior of the battery pack to relieve the pressure of the battery pack. On the one hand, the pipe setting is reduced, the structure of the energy storage container can be simplified, and the setting cost can be reduced; on the other hand, the space occupied by the pipe in the pressure relief chamber is reduced, and the size of the pressure relief chamber can be set compactly to make the structure of the energy storage container compact.

[0010] Preferably, the partition wall and the inner surface of the outer wall are sealed and connected, a plurality of partition wall through holes are arranged on the partition wall, and the pressure relief valve is connected with the pressure relief chamber through the partition wall through holes.

[0011] In this solution, the inner surfaces of the partition wall and the outer wall are sealed and connected to achieve sealed isolation of the energy storage chamber and the pressure relief chamber. On this basis, a partition wall through hole is provided on the partition wall to achieve communication between the pressure relief valve and the pressure relief chamber, resulting in a simple and compact structure.

[0012] Preferably, one end of the pressure relief valve passes through the through hole of the partition wall and extends into the pressure relief chamber.

[0013] In this solution, the pressure relief valve extends into the pressure relief chamber, and the gas discharged from the battery pack when the pressure is released can be directly discharged into the pressure relief chamber through the pressure relief valve. On the one hand, the pressure relief path from the inside of the battery pack to the pressure relief chamber can be shortened, making the structure of the energy storage container compact; on the other hand, the gas discharged from the battery pack when the pressure is released can be shortened or prevented from passing through the energy storage chamber, further preventing the thermal runaway of a single battery pack from affecting the operation of other battery packs, and further improving the safety and reliability of the operation of the energy storage container; on the third hand, there is no need to set up an additional channel connecting the pressure relief valve and the partition wall through hole, making the structure of the energy storage chamber compact.

[0014] Preferably, the energy storage container also includes a plurality of connectors, wherein the connectors are located on a side of the partition wall facing the energy storage cavity, one end of the connectors is sealingly connected to the partition wall, and the other end is sealingly connected to the battery pack, a connecting channel is formed inside the connectors, and the pressure relief valve is connected to the through hole of the partition wall via the connecting channel.

[0015] In the present scheme, the pressure relief valve and the partition wall through hole are sealed and connected by the connector, the partition wall and the battery pack. On the one hand, there is no need to set up a direct sealed connection between the pressure relief valve and the partition wall through hole, which can avoid damage to the pressure relief valve during the sealing process. On the second hand, the structure of the pressure relief valve is relatively complex. In order to achieve the sealed connection between the battery pack and the pressure relief chamber, the connection is sealed by the connector, the partition wall and the battery pack, which is more convenient to operate than the direct sealed connection between the pressure relief valve and the partition wall through hole. On the third hand, the relative position requirements of the battery pack and the partition wall through hole can be reduced, further improving the convenience of battery pack installation.

[0016] Preferably, the portion of the pressure relief valve located outside the battery pack is completely located within the connecting channel.

[0017] In this solution, such an arrangement eliminates the need for accurate alignment of the pressure relief valve and the partition wall through hole, further improving the convenience of battery pack installation.

[0018] Preferably, one end of the pressure relief valve passes through the connecting channel and the through hole of the partition wall and extends into the pressure relief chamber.

[0019] Preferably, the connecting member is annular and surrounds the pressure relief valve, one end of the connecting member is connected to a side of the partition wall facing the energy storage chamber, and the other end of the connecting member is connected to an outer surface of the battery pack facing the partition wall.

[0020] In the present solution, such an arrangement, on the one hand, makes the structure simple and compact; on the other hand, it facilitates the connection passage to extend in a straight line, so that the gas inside the battery pack can be discharged into the pressure relief chamber quickly and smoothly.

[0021] Preferably, the partition wall extends along the length direction of the box body, and the peripheral surface of the partition wall is sealed and connected to the inner surfaces of the two outer walls in the width direction and the inner surfaces of the two outer walls in the height direction of the box body.

[0022] In this solution, the arrangement is such that the partition wall separates the energy storage chamber and the pressure relief chamber along the width direction of the box body.

[0023] Preferably, the partition wall extends along the width direction of the box body, and the peripheral surface of the partition wall is sealed and connected to the inner surfaces of the two outer walls in the length direction and the inner surfaces of the two outer walls in the height direction of the box body.

[0024] In this solution, the arrangement is such that the partition wall separates the energy storage chamber and the pressure relief chamber along the length direction of the box body.

[0025] Preferably, a pressure relief port is provided on the outer wall defining the pressure relief chamber, and the pressure relief port communicates with the pressure relief chamber and the outside of the box body.

[0026] In this solution, the battery pack interior, the pressure relief valve, the pressure relief chamber, and the pressure relief port are connected in sequence to relieve pressure on the battery pack. The pressure relief port is arranged on the outer wall defining the pressure relief chamber, so that the pressure relief port and the pressure relief chamber are directly connected, which can shorten the path of the thermal runaway gas from the pressure relief chamber to the outside of the box, and facilitate the rapid and smooth pressure relief of the pressure relief chamber.

[0027] Preferably, there are multiple pressure relief ports, and the multiple pressure relief ports are dispersedly arranged along at least one direction of the length direction, width direction and height direction of the box body.

[0028] In this solution, such an arrangement makes it easy to shorten the discharge path from each battery pack to the pressure relief port, so that each battery pack can quickly release pressure through the pressure relief port.

[0029] Preferably, the partition wall extends along the length direction of the box body to separate the energy storage chamber and the pressure relief chamber along the width direction of the box body, and the pressure relief port is arranged on the outer wall at one end of the box body in the width direction.

[0030] The positive and progressive effects of the utility model are:

[0031] The interiors of multiple battery packs are connected to the pressure relief chamber through pressure relief valves respectively, and there is no need to set pipes or other structures in the pressure relief chamber to connect to the interior of the battery pack to relieve the pressure of the battery pack. On the one hand, the pipe setting is reduced, the structure of the energy storage container can be simplified, and the setting cost can be reduced; on the other hand, the space occupied by the pipe in the pressure relief chamber is reduced, and the size of the pressure relief chamber can be set compactly to make the structure of the energy storage container compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A partial structural schematic diagram of a box provided in one embodiment of the utility model;

[0033] Figure 2 for Figure 1 A cross-sectional view of the structure;

[0034] Figure 3 A partial structural schematic diagram of an energy storage container provided in one embodiment of the utility model;

[0035] Figure 4 for Figure 3 Front view of the middle structure;

[0036] Figure 5 for Figure 4 Middle AA section view;

[0037] Figure 6 A partial structural schematic diagram of an energy storage container provided in one embodiment of the utility model;

[0038] Figure 7 A cross-sectional view of a portion of the structure of an energy storage container provided in one embodiment of the utility model;

[0039] Figure 8 A schematic diagram of the structure of a battery pack provided in one embodiment of the utility model;

[0040] Fig. 9 A rear view of a battery pack provided in one embodiment of the utility model;

[0041] Fig.10 A partial cross-sectional view of the battery pack and the box provided in one embodiment of the utility model;

[0042] Fig.11 A schematic diagram of the structure of a bracket provided in one embodiment of the utility model;

[0043] Fig.12 for Figure 6 Enlarged view of middle part B;

[0044] Fig.13 for Figure 7 Enlarged view of middle C;

[0045] Fig.14 A schematic diagram of the structure of a protection assembly provided in one embodiment of the utility model;

[0046] Fig.15 A partial cross-sectional view of the cooperation between the protection assembly and the box body provided in one embodiment of the utility model.

[0047] Description of reference numerals:

[0048] Energy storage container 1000;

[0049] Box 1;

[0050] Outer wall 11, front wall 111, rear wall 112, left wall 113, right wall 114, top wall 115, bottom wall 116, cavity 117;

[0051] Partition wall 12, partition wall through hole 121;

[0052] Energy storage chamber 13, pressure relief chamber 14;

[0053] Connecting piece 15, connecting channel 151;

[0054] Pressure relief port 16, protection assembly 17, shutter 171, pressure relief window 172, pressure relief plate 173;

[0055] Maintenance door 18;

[0056] Energy storage cluster 2, battery pack 21, pressure relief valve 211, battery box 212, battery pack bracket 22, slide rail 221;

[0057] The housing 1 has a length direction L, a width direction W, and a height direction H. DETAILED DESCRIPTION

[0058] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0059] This embodiment provides an energy storage container, which includes a box body and a plurality of battery packs arranged in the box body. Figure 1-Figure 15 This is a schematic diagram of the structure provided for this embodiment.

[0060] like Figure 1-Figure 2The box body 1 has an outer wall 11 and a partition wall 12. The outer wall 11 defines a cavity 117. The partition wall 12 and the outer wall 11 are connected to separate the cavity 117 into an energy storage cavity 13 and a pressure relief cavity 14. The pressure relief cavity 14 is located at the side of the energy storage cavity 13 and is sealed and isolated from the energy storage cavity 13. It can be understood that the pressure relief cavity 14 is located at the side of the energy storage cavity 13, which means that the pressure relief cavity 14 can be located in front of the energy storage cavity 13, the back, the left side, the right side, or a combination of front and back and left and right (a combination of front and back and left and right, such as the left front).

[0061] like Figure 3-Figure 7 , multiple battery packs 21 are arranged in the energy storage cavity 13, such as Figure 8-Figure 9 Each battery pack 21 includes a pressure relief valve 211, such as Fig.10 , the interior of each battery pack 21 is connected to the pressure relief chamber 14 through the pressure relief valve 211, so that when thermal runaway occurs, the thermal runaway gas inside the battery pack 21 can be discharged into the pressure relief chamber 14 to achieve pressure relief of the battery pack 21. The pressure relief chamber 14 and the energy storage chamber 13 are sealed and isolated, which can prevent the operation of other battery packs 21 in the energy storage chamber 13 from being affected when a single battery pack 21 releases pressure into the pressure relief chamber 14, thereby improving the safety and reliability of the operation of the energy storage container 1000. The interior of each battery pack 21 is connected to the pressure relief chamber 14 through the pressure relief valve 211, respectively, and there is no need to set a pipe or other structure in the pressure relief chamber 14 to connect the interior of the battery pack 21 to relieve the pressure of the battery pack 21. On the one hand, the pipe setting is reduced, the structure of the energy storage container 1000 can be simplified, and the setting cost can be reduced; on the other hand, the space occupied by the pipe in the pressure relief chamber 14 is reduced, and the structure of the energy storage container 1000 can be made compact by setting the size of the pressure relief chamber 14 compactly.

[0062] The partition wall 12 may be made of fireproof material or heat-insulating material, or a fireproof layer and a heat-insulating layer may be provided on the surface of the partition wall 12 to improve the fireproof and heat-insulating performance of the energy storage cavity 13 .

[0063] Specifically, Figure 1 , Figure 2 , Figure 6 , Figure 7 The box body 1 in this embodiment is in a rectangular parallelepiped shape and has six outer walls 11. The two outer walls 11 of the box body 1 along the length direction L are respectively a front wall 111 and a rear wall 112. The two outer walls 11 along the width direction W are respectively a left wall 113 and a right wall 114. The two outer walls 11 along the height direction H are respectively a top wall 115 and a bottom wall 116. Figure 1-Figure 5 The front wall 111 is not shown. Figure 6-Figure 7The front wall 111 is shown, but the top wall 115 is not shown. The box body 1 can adopt a standard container structure, so that the energy storage container 1000 can be used directly as a transport container, without the need to set up a separate transport container on the outside of the energy storage container 1000, which is beneficial to improve the carrying capacity and reduce transportation costs. The height of the box body 1 can be designed according to the actual energy density requirements to meet the needs of different energy storage scenarios; standard lifting angles can be set at the top and bottom of the box body 1 for easy lifting. In this embodiment, an energy storage chamber 13 and a pressure relief chamber 14 are set in the box body 1; in other embodiments, other functional chambers can be set in the box body 1 according to the use requirements of the energy storage container 1000.

[0064] like Figure 5 , Figure 7 , the partition wall 12 is sealed and connected to the inner surface of the outer wall 11, so that the energy storage chamber 13 and the pressure relief chamber 14 are sealed and isolated. Specifically, in this embodiment, the partition wall 12 extends along the L direction, and the peripheral surface of the partition wall 12 and the left wall 113, the right wall 114, the top wall 115 and the bottom wall 116 of the box body 1 are all sealed and connected, separating the energy storage chamber 13 and the pressure relief chamber 14 along the width direction of the box body 1. In order to achieve a sealed connection between two components, welding, bonding or pressure sealing can be used, but not limited to; when using bonding connection, fireproof sealant can be used to meet the requirements of fire prevention or high temperature resistance.

[0065] In other embodiments, the partition wall 12 can be configured to extend along the width direction of the box body 1, and the peripheral surface of the partition wall 12 and the front wall 111, rear wall 112, top wall 115 and bottom wall 116 of the box body 1 are all sealed and connected to separate the energy storage chamber 13 and the pressure relief chamber 14 along the length direction of the box body 1.

[0066] It is understandable that each battery pack 21 includes a battery box 212 and one or more battery cells encapsulated by the battery box 212. The battery cell may include a lithium-ion secondary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc. The battery cell may be a cylindrical battery cell, a square shell battery cell or a soft pack battery cell. The multiple battery packs 21 in the energy storage cavity 13 may be arranged in a bracket or a cabinet, and may be connected in series, in parallel or in series and in parallel with each other. In addition to arranging the battery pack 21 in the energy storage cavity 13, a main control component and a confluence component may also be arranged. The multiple battery packs 21 may be connected to the main control component through the confluence component, and the electrical connection between the multiple battery packs 21 may be realized through the main control component. The energy storage container 1000 may also include a thermal management component, which may include but is not limited to an air conditioning component, a fan component, a water cooling pipe, etc. The heat pipe component may be used to perform thermal management on the interior of the energy storage container 1000 to adjust the temperature inside the energy storage container 1000.

[0067] It is understandable that in the battery pack 21, in order to prevent the external environment from affecting the battery cells contained therein, the battery box 212 has a certain degree of sealing. For the battery cells in the battery pack 21, during the operation of the battery cells, the internal pressure or temperature of the battery cells will change due to the chemical reaction inside them. In order to ensure the overall safety of the battery pack 21, the battery box 212 and the battery cells will be provided with a pressure relief mechanism. For the pressure relief mechanism on the battery cell, it refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. When the pressure relief mechanism on the battery cell is actuated, the high-temperature and high-pressure gas inside the battery cell is discharged into the battery box 212 through the pressure relief mechanism on the battery cell. Further, when the internal pressure or temperature of the battery box 212 reaches a preset threshold, the pressure relief mechanism on the battery box 212 (the pressure relief valve 211 referred to in the utility model) will also be actuated, and the high-temperature and high-pressure gas from the inside of the battery cell is discharged through the pressure relief valve 211 on the battery box 212. The pressure relief valve 211 may be a valve-type, spring-type or spring-type recoverable pressure relief structure, and the pressure relief valve 211 may have rainproof and dustproof functions.

[0068] The depth of the battery pack 21 is close to the width of the box 1. On the one hand, it is convenient for the maintenance doors and pressure relief chambers 14 at both ends of the battery pack 21 along the W direction to correspond to the two ends of the box 1; on the other hand, it can achieve the utilization rate of the width space of the box 1 to further improve the energy density of the energy storage container 1000. Specifically, in this embodiment, the width of the box 1 is about 2.44m, and the depth of the battery pack 21 along the W direction is between 1.6m and 2.3m.

[0069] like Figure 4 , multiple battery packs 21 arranged along the H direction constitute an energy storage cluster 2, Figure 4 The dotted rectangular frame in the figure shows an energy storage cluster 2. In this embodiment, six energy storage clusters 2 are arranged in the energy storage container 1000. A maintenance door 18 is arranged at each energy storage cluster 2 to avoid affecting the operation of other energy storage clusters 2 when maintaining a single energy storage cluster 2.

[0070] The energy storage container 1000 further includes a battery pack bracket 22, which is fixed in the energy storage cavity 13. The structure of the battery pack bracket 22 is as follows: Fig.11 As shown, the battery pack bracket 22 is provided with a slide rail 221, and the slide rail 221 is arranged in pairs along the L direction, so that the battery pack 21 can be slidably installed on the battery pack bracket 22. The battery pack 21 is slidably installed, making it convenient to put in or take out the battery pack 21. Fig.11The battery pack bracket 22 shown in the figure is used to install all battery packs 21 in an energy storage cluster 2. In other embodiments, the battery pack 21 can be installed in the energy storage cavity 13 in a detachable manner such as threaded connection of bolts and nuts, clamping connection of clamping parts, or sliding connection of the slide rail 221.

[0071] like Figure 5 , Figure 7 , Fig.10 The partition wall 12 is provided with a plurality of partition wall through holes 121, and the pressure relief valve 211 is connected to the pressure relief chamber 14 through the partition wall through holes 121. On the basis of the sealed isolation of the energy storage chamber 13 and the pressure relief chamber 14, the pressure relief valve 211 and the pressure relief chamber 14 are connected through the partition wall through holes 121 on the partition wall 12, and the structure is simple and compact.

[0072] The energy storage container 1000 further includes a plurality of connecting members 15, such as Fig.10 The connector 15 is located on the side of the partition wall 12 facing the energy storage chamber 13. One end of the connector 15 is sealed and connected to the partition wall 12, and the other end is sealed and connected to the battery pack 21. A connecting channel 151 is formed inside the connector 15, and the pressure relief valve 211 is connected to the partition wall through hole 121 through the connecting channel 151. The pressure relief valve 211 and the partition wall through hole 121 are connected in a sealed manner through the connector 15, the partition wall 12 and the battery pack 21. On the one hand, there is no need to set up a direct sealed connection between the pressure relief valve 211 and the partition wall through hole 121, so as to avoid damage to the pressure relief valve 211 by the sealing process. On the other hand, the structure of the pressure relief valve 211 is relatively complicated. In order to achieve the sealed connection between the interior of the battery pack 21 and the pressure relief chamber 14, the pressure relief valve 21 is connected in a sealed manner through the connector 15, the partition wall 12 and the battery pack 21. Compared with the direct sealed connection between the pressure relief valve 211 and the partition wall through hole 121, the operation is more convenient. On the third hand, the relative position requirements of the battery pack 21 and the partition wall through hole 121 can be reduced, so as to further improve the convenience of installing the battery pack 21.

[0073] In this embodiment, the connector 15 is an annular structure surrounding the pressure relief valve 211. One end of the connector 15 is sealed and connected to the side of the partition wall 12 facing the energy storage chamber 13, and the other end is sealed and connected to the outer surface of the battery pack 21 facing the partition wall 12. The structure is simple and compact. Both ends of the connector 15 can be planes, parallel to the surface of the partition wall 12 and the surface of the battery pack 21, respectively, so as to facilitate connection with these two surfaces. The connector 15 can be connected together by welding, bolting, or adhesive connection. The connector 15 can be made of metal parts or fireproof plastic parts. In this embodiment, the connector 15 is a metal part, which is welded to the battery pack 21, and the connection is also achieved. The battery pack 21, the pressure relief valve 211, the connector 15 and the connecting channel 151, and the partition wall through hole 121 can be set to correspond to each other.

[0074] like Fig.10 In this embodiment, the portion of the pressure relief valve 211 located outside the battery pack 21 is completely located in the connecting channel 151. With this arrangement, the pressure relief valve 211 and the partition wall through hole 121 do not need to be accurately aligned, which further improves the convenience of installing the battery pack 21. In other embodiments, one end of the connector 15 may be arranged to extend into the partition wall through hole 121 and be sealed and connected to the surface of the partition wall through hole 121; or one end of the pressure relief valve 211 may be arranged to pass through the connecting channel 151 and the partition wall through hole 121 and extend into the pressure relief chamber 14; or, the connector 15 may not be arranged, and the outer surface of the pressure relief valve 211 may be arranged to be sealed and connected to the partition wall through hole 121. When the pressure relief valve 211 is arranged to extend into the pressure relief chamber 14, the gas discharged from the battery pack 21 when the pressure is released can be directly discharged into the pressure relief chamber 14 through the pressure relief valve 211. On the first hand, the pressure relief path from the inside of the battery pack 21 to the pressure relief chamber 14 can be shortened, so that the structure of the energy storage container 1000 is compact. On the second hand, the gas discharged from the battery pack 21 when the pressure is released can be shortened or prevented from passing through the energy storage chamber 13, further avoiding the thermal runaway of a single battery pack 21 affecting the operation of other battery packs 21, and further improving the safety and reliability of the operation of the energy storage container 1000. On the third hand, there is no need to additionally set a channel to connect the pressure relief valve 211 and the partition wall through hole 121, so that the structure of the energy storage chamber 13 is compact.

[0075] like Figure 1 , Figure 12-Figure 15 , a pressure relief port 16 is provided on the outer wall 11 of the box body 1, and the pressure relief port 16 connects the pressure relief chamber 14 and the outside of the box body 1, so that the inside of the battery pack 21, the pressure relief valve 211, the pressure relief chamber 14, the pressure relief port 16, and the outside of the box body 1 are connected in sequence to form a pressure relief path for the battery pack 21. The pressure relief port 16 is provided on the outer wall 11 that defines the pressure relief chamber 14, so that the pressure relief port 16 and the pressure relief chamber 14 are directly connected, which can shorten the path for the thermal runaway gas to be discharged from the pressure relief chamber 14 to the outside of the box body 1, and facilitates rapid and smooth pressure relief. In this embodiment, the pressure relief port 16 is provided at the position where the pressure relief chamber 14 is defined by the left wall 113 of the box body 1, so that the pressure relief port 16 is located at one end in the width direction of the box body 1.

[0076] In this embodiment, a protective assembly 17 is provided at the pressure relief port 16, and the protective assembly 17 includes a shutter 171, a pressure relief window 172, and a pressure relief plate 173. The shutter 171 and the pressure relief window 172 can be fixedly connected to the outer wall 11 of the box body 1 by welding or bolting, and the pressure relief plate 173 is connected to the pressure relief window 172 by a hinge, so that the pressure relief plate 173 can be turned to the outside of the box body 1 to open the pressure relief window 172. The shutter 171 is provided on the side of the pressure relief port 16 facing the pressure relief chamber 14, and the pressure relief window 172 is provided on the side of the pressure relief port 16 facing the outside of the box body 1. The protective assembly 17 has a dual protective effect, which can prevent rain and dust from entering the pressure relief chamber 14, thereby improving the safety and reliability of the operation of the energy storage container 1000. Under normal conditions, a sealing gasket is attached to the side of the pressure relief plate 173 facing the outer wall 11 of the box body 1. The pressure relief plate 173 and the sealing gasket are in contact with each other by the gravity of the pressure relief plate 173, which serves as the first protective sealing structure of the pressure relief port 16; the shutter 171 serves as the second protective structure of the pressure relief port 16. When the internal pressure or temperature of a battery pack 21 is too high, the high-temperature or high-pressure gas is automatically discharged from the inside of the battery pack 21 through the pressure relief valve 211, and then passes through the partition wall through hole 121, the pressure relief chamber 14, and the shutter 171 at the pressure relief port 16 in sequence, and acts on the pressure relief plate 173 at a certain speed to make the pressure relief plate 173 flip outward to open the pressure relief window 172, so as to be discharged from the pressure relief window 172 to the outside of the box body 1. When the speed at which the pressure relief gas inside the battery pack 21 reaches the pressure relief plate 173 is lower than a certain value, the pressure relief plate 173 is reset under the action of gravity to block the pressure relief window 172. The protection component 17 is a purely mechanical structure with low cost and good durability. It can passively release pressure without electric control, and the pressure relief method is simple and reliable.

[0077] In other embodiments, a waterproof structure may be provided on the communication path between the pressure relief valve 211 and the pressure relief chamber 14, for example, a waterproof structure may be provided in the connecting channel 151 or the partition wall through hole 121 to prevent rainwater from gathering at the pressure relief valve 211. The waterproof structure may be, but is not limited to, a waterproof breathable membrane or a one-way valve.

[0078] In other embodiments, multiple pressure relief ports 16 may be provided to facilitate rapid discharge of thermal runaway gas from the battery pack 21 from the pressure relief chamber 14 to the housing 1. Further, multiple pressure relief ports 16 may be provided in a dispersed manner so that the discharge path from each battery pack 21 to the pressure relief port 16 is relatively short, so that each battery pack 21 can be rapidly depressurized through the pressure relief port 16. Specifically, multiple pressure relief ports 16 may be provided at different positions in one or more of the L direction, the W direction, and the H direction.

[0079] In other embodiments, a sensor may be installed in the energy storage chamber 13 and / or the pressure relief chamber 14 to detect whether there is a battery pack 21 releasing pressure, and the sensor may be a combustible gas sensor; further, a fan may be provided at at least part of the pressure relief port 16 of the pressure relief chamber 14, and when the sensor detects a pressure relief signal and transmits it to the controller, the controller controls the fan to run to quickly discharge the thermal runaway gas from the pressure relief chamber 14, thereby achieving active pressure relief. In other embodiments, the pressure relief port 16 of the box body 1 may adopt a pressure relief method combining active pressure relief and passive pressure relief.

[0080] like Figure 6 , Figure 7 The energy storage chamber 13 is located at the front of the box body 1, and the pressure relief chamber 14 is located at the rear of the box body 1. A maintenance door 18 is provided on the front wall 111 of the box body 1. Opening the maintenance door 18 facilitates maintenance of the battery pack 21 and other equipment in the energy storage chamber 13. In this embodiment, the pressure relief valve 211 is arranged at the rear of the battery pack 21, on the side of the battery pack 21 away from the maintenance door 18, and the pressure relief chamber 14 is also located on the side of the energy storage chamber 13 away from the maintenance door 18, which can prevent the pressure relief of the battery pack 21 from affecting the opening of the maintenance door 18, and causing damage to personnel after the maintenance door 18 is opened, thereby improving the safety and reliability of the operation of the energy storage container 1000.

[0081] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An energy storage container, characterized in that: The energy storage container comprises: A box body, comprising an outer wall and a partition wall, wherein the partition wall is connected to the outer wall and divides the cavity defined by the outer wall into an energy storage cavity and a pressure relief cavity which are sealed and isolated from each other, and the pressure relief cavity is located on the side of the energy storage cavity; A plurality of battery packs are accommodated in the energy storage cavity, and each of the battery packs includes a pressure relief valve, which communicates the interior of the battery pack with the pressure relief cavity.

2. The energy storage container according to claim 1, characterized in that: The partition wall is sealed to the inner surface of the outer wall, a plurality of partition wall through holes are arranged on the partition wall, and the pressure relief valve is communicated with the pressure relief chamber through the partition wall through holes.

3. The energy storage container according to claim 2, characterized in that: One end of the pressure relief valve passes through the through hole of the partition wall and extends into the pressure relief chamber.

4. The energy storage container according to claim 2, characterized in that: The energy storage container also includes a plurality of connectors, each of which is located on a side of the partition wall facing the energy storage cavity, one end of the connector being sealingly connected to the partition wall, and the other end being sealingly connected to the battery pack, a connecting channel being formed inside the connector, and the pressure relief valve being connected to the through hole of the partition wall via the connecting channel.

5. The energy storage container according to claim 4, characterized in that: The portion of the pressure relief valve located outside the battery pack is completely located within the connecting passage; Alternatively, one end of the pressure relief valve passes through the connecting channel and the through hole of the partition wall and extends into the pressure relief chamber.

6. The energy storage container according to claim 4, characterized in that: The connecting member is annular and surrounds the pressure relief valve, one end of the connecting member is connected to a side of the partition wall facing the energy storage cavity, and the other end of the connecting member is connected to an outer surface of the battery pack facing the partition wall.

7. The energy storage container according to claim 2, characterized in that: The partition wall extends along the length direction of the box body, and the peripheral surface of the partition wall is sealed and connected to the inner surfaces of the two outer walls in the width direction and the inner surfaces of the two outer walls in the height direction of the box body; Alternatively, the partition wall extends along the width direction of the box body, and the peripheral surface of the partition wall is sealed and connected to the inner surfaces of the two outer walls in the length direction of the box body and the inner surfaces of the two outer walls in the height direction.

8. The energy storage container according to claim 1, characterized in that: A pressure relief port is provided on the outer wall defining the pressure relief chamber, and the pressure relief port communicates with the pressure relief chamber and the outside of the box body.

9. The energy storage container according to claim 8, characterized in that: There are multiple pressure relief ports, and the multiple pressure relief ports are dispersedly arranged along at least one direction of the length direction, width direction and height direction of the box body.

10. The energy storage container according to claim 8, characterized in that: The partition wall extends along the length direction of the box body to separate the energy storage chamber and the pressure relief chamber along the width direction of the box body, and the pressure relief port is arranged on the outer wall at one end of the box body in the width direction.

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