Battery device, energy storage device, energy storage system and charging network

Abstract

The embodiment of the utility model discloses a battery device, an energy storage device, an energy storage system and a charging network. The battery device comprises a plurality of battery cells, wherein a pressure relief mechanism is arranged on the wall part of a shell of each battery cell; the discharge pipeline comprises a gas collecting pipe, the gas collecting pipe comprises a first area and a plurality of second areas, the first area and the second areas are oppositely arranged along the thickness direction of the wall part, the second areas are second through holes or weak areas, and the plurality of second areas are in one-to-one correspondence with the pressure relief mechanisms of the plurality of single batteries; the plurality of pressure relief mechanisms are arranged in the second area, so that emissions discharged by the plurality of pressure relief mechanisms enter the gas collecting pipe through the second area; and the heat insulation piece covers the first area. According to the battery device, the energy storage device, the energy storage system and the charging network, the reliability and the stability of the battery device can be improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] With the continuous advancement of battery technology, various new energy industries utilizing battery devices as energy storage equipment have experienced rapid development. In the development of battery technology, besides improving battery device performance, the stability of battery devices is also a crucial issue. In the event of thermal runaway in a single battery cell, how to reduce the impact of emissions from that cell on other components within the battery device is a pressing technical problem that needs to be solved. Utility Model Content

[0003] This application provides a battery device, an energy storage device, an energy storage system, and a charging network, which can improve the reliability and stability of the battery device.

[0004] In a first aspect, a battery device is provided, comprising: a plurality of battery cells, each battery cell having a pressure relief mechanism disposed on the wall of its casing; a discharge pipe including a gas collection pipe, the gas collection pipe including a first region and a plurality of second regions, the first region and the second regions being disposed opposite to each other along the thickness direction of the wall, the second region being a second through hole or a weak area, the plurality of second regions corresponding one-to-one with the pressure relief mechanisms of the plurality of battery cells, so that the emissions discharged by the plurality of pressure relief mechanisms enter the gas collection pipe through the second region; and a heat insulation member covering the first region.

[0005] Therefore, in the battery device of this application embodiment, in the event of thermal runaway of a single battery cell, the pressure relief mechanism is activated, and the battery cell discharges emissions through the pressure relief mechanism. These emissions pass through a second region and enter the gas collection pipe of the discharge pipeline. Since the heat insulation component at least covers a first region of the gas collection pipe, when the high-temperature, high-pressure emissions enter the gas collection pipe, they are discharged towards the first region, which is opposite to the second region, under high-pressure impact. The heat insulation component can block these emissions, reducing the risk of leakage from the first region to the outside of the discharge pipeline. This allows the emissions to be collected and directionally discharged through the gas collection pipe of the discharge pipeline, thereby reducing the impact of the high-temperature, high-pressure emissions on other components of the battery device. For example, considering that the high-temperature, high-pressure emissions may include conductive particles, these particles may cause short circuits between multiple components within the battery device, potentially leading to further fire or explosion. Therefore, reducing emissions leakage to the outside of the discharge pipeline can reduce further impact on the battery device, lower the risk of explosion, and improve the reliability and stability of the battery device.

[0006] In some embodiments, the heat insulation element is located inside the gas collection pipe. When the high-temperature and high-pressure emissions are discharged toward the first region, the heat insulation element covers the first region. Under the blocking effect of the heat insulation element, the risk of the emissions melting through the first region can be reduced, which also reduces the risk of the emissions leaking to the outside of the discharge pipe. This allows the emissions to be collected and directionally discharged through the gas collection pipe of the discharge pipe, thereby reducing the impact of the high-temperature and high-pressure emissions on other components of the battery device.

[0007] In some embodiments, the first region corresponds to a plurality of second regions. Correspondingly, the heat insulation member extends along the arrangement direction of the plurality of second regions to cover the first region, thereby reducing the number of heat insulation members and simplifying the assembly between the heat insulation member and the gas collecting pipe, thus improving the processing efficiency of the battery device.

[0008] In some embodiments, the gas collecting pipe includes a plurality of first regions, each corresponding to a plurality of second regions, and the battery device includes a plurality of heat insulation elements, each corresponding to a plurality of first regions. This reduces the area covered by the heat insulation elements; for example, the area between the plurality of first regions in the gas collecting pipe may not be covered by heat insulation elements, thereby reducing the total mass of all heat insulation elements included in the battery device and thus increasing the energy density of the battery device.

[0009] In some embodiments, the gas collecting pipe includes a first wall, which includes a first region. The first wall is provided with a groove that opens toward the second region, and the heat insulation member is accommodated in the groove. This facilitates the installation of the heat insulation member and restricts its position, reducing the risk of displacement and effectively protecting the first region. Furthermore, given a fixed thickness of both the heat insulation member and the wall of the gas collecting pipe, placing the heat insulation member in the groove increases the internal space of the gas collecting pipe in the discharge pipeline, improving the discharge efficiency of pollutants and thus enhancing the reliability of the battery device.

[0010] In some embodiments, the gas collecting pipe includes intersecting first and second walls. The first wall includes the first region. The heat insulation member includes intersecting main body and extension. The main body covers the first region of the first wall, and the extension covers at least a portion of the second wall. Thus, along the circumference of the gas collecting pipe, the heat insulation member corresponds to at least two walls of the gas collecting pipe, increasing the coverage area of ​​the heat insulation member, further protecting more areas of the gas collecting pipe, reducing the impact of high-temperature, high-pressure emissions on the gas collecting pipe, and thereby reducing the risk of emission leakage. This allows emissions to be collected and directionally discharged through the gas collecting pipe, reducing the impact of the high-temperature, high-pressure emissions on other components of the battery device.

[0011] In some embodiments, the gas collecting pipe includes two opposing second walls, and the heat insulation member includes two opposing extensions. On the one hand, considering that the gas collecting pipe is generally a symmetrical structure, providing the heat insulation member with two extensions to cover at least a portion of the two second walls respectively can improve the structural stability of the heat insulation member, facilitate fixing, reduce the risk of displacement of the heat insulation member, and thus improve the reliability of the heat insulation member. On the other hand, increasing the coverage area of ​​the heat insulation member can protect the second walls of the gas collecting pipe, thereby reducing the impact of high-temperature and high-pressure emissions on the second walls of the gas collecting pipe, and thus reducing the risk of emissions leakage.

[0012] In some embodiments, the shape of the heat insulation element is the same as that of the gas collecting pipe, so that the heat insulation element and the gas collecting pipe are stacked together radially along the gas collecting pipe, which is simple in structure and easy to assemble between the heat insulation element and the gas collecting pipe; the heat insulation element is provided with a clearance hole, which is used to avoid the second area, so as to reduce the obstruction of the heat insulation element to the gas collecting pipe when the exhaust enters the gas collecting pipe, so that the exhaust can quickly enter the gas collecting pipe and be discharged.

[0013] In some embodiments, the heat insulation component is provided with a plurality of clearance holes, each of which corresponds to a plurality of the second regions, so that the heat insulation component can cover more areas of the gas collecting pipe, protect the gas collecting pipe, thereby reducing the risk of high-temperature and high-pressure emissions melting through the gas collecting pipe and causing emissions leakage, and allowing the emissions to be collected and discharged in a directional manner through the gas collecting pipe, so as to reduce the impact of the high-temperature and high-pressure emissions on other components of the battery device.

[0014] In some embodiments, the gas collecting pipe includes a first wall, which includes a first region, and the first region is a first through-hole. After the high-temperature, high-pressure emissions enter the gas collecting pipe, they come into contact with a heat insulation component in the first region. This heat insulation component prevents the emissions from leaking out of the first region, allowing the emissions to be collected and directionally discharged through the gas collecting pipe, thereby reducing the impact of the high-temperature, high-pressure emissions on other components of the battery device. Furthermore, the first through-hole in the gas collecting pipe reduces the overall weight of the discharge pipeline, thus reducing the overall weight of the battery device and increasing its energy density.

[0015] In some embodiments, at least a portion of the heat insulation element is accommodated within the first through-hole. This increases the contact area between the heat insulation element and the gas collecting pipe, facilitating the fixation of the heat insulation element and the gas collecting pipe and improving structural stability. In addition, it can increase the thickness of the heat insulation element, thereby improving the structural strength of the heat insulation element, reducing the risk of emissions damaging the heat insulation element, and improving the reliability of the heat insulation element.

[0016] In some embodiments, the first through hole corresponds to a plurality of the second regions, and the first through hole penetrates the first wall along the arrangement direction of the plurality of second regions. In this way, the number of heat insulation components can be reduced, the structure can be simplified, processing can be facilitated, and the assembly of the heat insulation components and the gas collecting pipe can be facilitated.

[0017] In some embodiments, the first wall includes a plurality of first through holes, each corresponding to a plurality of second regions. The battery device includes a plurality of heat insulation elements, each corresponding to a plurality of first through holes. Considering that for the same volume, the weight of a heat insulation element is generally greater than that of a gas collecting pipe, by providing multiple heat insulation elements, the overall volume of the heat insulation elements can be reduced, thus reducing the weight of the heat insulation elements, thereby reducing the weight of the battery device and increasing the energy density of the battery device.

[0018] In some embodiments, along the arrangement direction of the plurality of second regions: the maximum length of the edge region of the heat insulation member is greater than the maximum length of the middle region of the heat insulation member, the maximum length of the edge region of the first through hole is greater than the maximum length of the middle region of the first through hole, and the maximum length of the surface of the first through hole facing the inside of the gas collecting pipe is greater than the maximum length of the surface of the first through hole facing the outside of the gas collecting pipe. By setting the above dimensions, the position of the heat insulation member within the first through hole can be restricted, the misalignment of the heat insulation member can be reduced, the risk of emission leakage caused by the misalignment of the heat insulation member can be reduced, and thus the reliability of the battery device can be improved.

[0019] In some embodiments, the material of the gas collecting pipe is different from that of the insulation component. The insulation component is typically made of a high-temperature resistant material to withstand the impact of high-temperature and high-pressure emissions; while the material of the gas collecting pipe can have relatively weaker heat resistance compared to the insulation component, in order to reduce the difficulty of material selection and facilitate processing.

[0020] In some embodiments, the gas collecting pipe is made of plastic, and the heat insulation component is made of sheet metal. Using plastic for the gas collecting pipe facilitates processing and reduces its weight, thus decreasing the overall weight of the battery device. Using sheet metal for the heat insulation component effectively improves its structural strength, reduces the risk of emissions melting through the insulation, thereby reducing the risk of emissions leakage and improving the reliability of the battery device.

[0021] In some embodiments, the material of the gas collecting pipe and / or the material of the heat insulation component satisfies at least one of the following conditions: the melting point is in the range of [350°C, 650°C]; the volume resistivity is in the range of [10...]. 15 Ω·cm, 10 16 [Ω·cm]; dielectric strength ranges from [25kV / mm, 55kV / mm]; and flame retardancy rating is UL94 V0. This reduces the risk of emissions damaging the gas collection pipe and / or insulation, and improves the structural stability and reliability of the gas collection pipe and / or insulation.

[0022] In some embodiments, the discharge pipeline further includes multiple connecting pipes, each of which is disposed between a corresponding pressure relief mechanism and a second region, so that the emissions discharged by the pressure relief mechanism pass through the connecting pipe and the second region into the gas collection pipe. The connecting pipe can be used to connect the wall where the pressure relief mechanism is located and the gas collection pipe, so that in the event of thermal runaway of a battery cell, the pressure relief mechanism is actuated, the battery cell discharges emissions through the pressure relief mechanism, the emissions reach the second region through the connecting pipe, and then enter the gas collection pipe, thereby achieving the collection and directional discharge of emissions.

[0023] In some embodiments, each connecting pipe includes a first limiting portion and a second limiting portion. The first limiting portion surrounds the pressure relief mechanism and is disposed on the outer surface of the battery cell. The second limiting portion surrounds the second region, which is the second through hole. The first limiting portion and the second limiting portion cooperate to form the connecting pipe. In the event of thermal runaway of the battery cell, the pressure relief mechanism is activated, and the battery cell discharges emissions through the pressure relief mechanism. The emissions pass through the connecting pipe formed by the cooperating first and second limiting portions and enter the gas collecting pipe through the second region. The gas collecting pipe can then collect and discharge the emissions, thereby reducing the impact of the high-temperature and high-pressure emissions on other components of the battery device.

[0024] In a second aspect, an energy storage device is provided, comprising: a plurality of battery devices as described in the first aspect or any one of the embodiments of the first aspect, the battery devices being used to store or provide electrical energy.

[0025] Thirdly, an energy storage system is provided, comprising: a power conversion device; and the battery device described in the second aspect, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0026] Fourthly, a charging network is provided, comprising: a charging pile; an energy storage device as described in the second aspect or an energy storage system as described in the third aspect, wherein the energy storage device or the energy storage system is used to provide electrical energy to the charging pile. Attached Figure Description

[0027] Figure 1 This is an exploded view of a battery device according to an embodiment of this application;

[0028] Figure 2 This is a partial structural diagram of a battery device according to an embodiment of this application;

[0029] Figure 3 This is an exploded view of a partial structure of a battery device according to an embodiment of this application;

[0030] Figure 4This is a partial structural diagram of an emission pipeline according to an embodiment of this application;

[0031] Figure 5 This is a partial structural diagram of an exhaust pipe equipped with a heat insulation component according to an embodiment of this application;

[0032] Figure 6 This is a cross-sectional schematic diagram of a gas collecting pipe with a heat insulation component according to an embodiment of this application;

[0033] Figure 7 This is a partial structural diagram of an exhaust pipe equipped with a heat insulation component according to another embodiment of this application;

[0034] Figure 8 This is a cross-sectional schematic diagram of a gas collecting pipe with a heat insulation component according to another embodiment of this application;

[0035] Figure 9 This is a partial structural diagram of an exhaust pipe equipped with a heat insulation component according to another embodiment of this application;

[0036] Figure 10 This is a cross-sectional schematic diagram of a gas collecting pipe with a heat insulation component according to another embodiment of this application;

[0037] Figure 11 This is a partial structural schematic diagram of a heat insulation component according to an embodiment of this application;

[0038] Figure 12 This is a partial structural diagram of an exhaust pipe equipped with a heat insulation component according to another embodiment of this application;

[0039] Figure 13 This is a partial structural diagram of an exhaust pipe equipped with a heat insulation component according to another embodiment of this application;

[0040] Figure 14 This is a top view schematic diagram of a partial structure of the gas collecting pipe according to another embodiment of this application;

[0041] Figure 15 This is a cross-sectional schematic diagram of a partial structure of the gas collecting pipe according to another embodiment of this application;

[0042] Figure 16 This is a top view schematic diagram of a partial structure of a gas collecting pipe equipped with a heat insulation element according to another embodiment of this application;

[0043] Figure 17 This is a partial cross-sectional schematic diagram of a gas collecting pipe with a heat insulation component according to another embodiment of this application;

[0044] Figure 18 This is a side view of a partial structure of a battery device according to an embodiment of this application;

[0045] Figure 19 This is a cross-sectional schematic diagram of a partial structure of a battery device according to an embodiment of this application;

[0046] Figure 20 This is an exploded view of a partial structure of the discharge pipeline and the second limiting part according to an embodiment of this application;

[0047] Figure 21 This is a cross-sectional schematic diagram of a partial structure of a battery device according to another embodiment of this application;

[0048] Figure 22 This is a schematic diagram of the structure of the second limiting part according to an embodiment of this application;

[0049] Figure 23 This is a schematic diagram of the structure of a battery cell according to an embodiment of this application;

[0050] Figure 24 This is an exploded view of the casing of a battery cell according to one embodiment of this application;

[0051] Figure 25 This is a schematic diagram of the structure of the storage chamber of an energy storage device according to an embodiment of this application;

[0052] Figure 26 This is a schematic diagram of the structure of multiple battery devices housed in a compartment according to an embodiment of this application;

[0053] Figure 27 This is a structural block diagram of an energy storage system according to an embodiment of this application;

[0054] Figure 28 This is a structural block diagram of a charging network according to an embodiment of this application.

[0055] The accompanying drawings are not drawn to scale. Detailed Implementation

[0056] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0057] 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 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.

[0058] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0059] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0062] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0063] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0064] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0065] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0066] In some embodiments, a pressure relief mechanism is provided on the casing of the battery cell. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0067] As an example, the internal pressure or temperature of a battery cell is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell.

[0068] When a battery cell experiences thermal runaway or other abnormal conditions, high-temperature, high-pressure emissions are generated inside the cell. Current pressure relief mechanism designs primarily focus on releasing the high pressure and heat inside the battery cell, i.e., venting the emissions to the outside. However, how to properly dissipate these high-temperature, high-pressure emissions after they leave the battery cell in a way that minimizes the risk of further damage to the battery system remains a pressing issue that needs to be addressed.

[0069] This application provides a battery device, energy storage device, energy storage system, and charging network that can solve the aforementioned problems. The battery device of this application includes multiple battery cells, a discharge pipe, and a heat insulation component. Each battery cell has a pressure relief mechanism on its outer wall. The discharge pipe includes a gas collection pipe, which includes a first region and multiple second regions. The first and second regions are arranged opposite to each other along the thickness direction of the wall where the pressure relief mechanism is located. The second regions are second through holes or weak areas. Each of the multiple second regions corresponds one-to-one with the pressure relief mechanism of the multiple battery cells, so that in the event of thermal runaway of a battery cell, the pressure relief mechanism is activated, and the battery cell discharges emissions through the pressure relief mechanism. These emissions then enter the gas collection pipe through the second regions. Furthermore, by using the same gas collection pipe to correspond to multiple battery cells, when any of the multiple battery cells experiences thermal runaway, the emissions from the battery cell can be collected through this gas collection pipe, simplifying the structure and reducing the structural complexity of the battery device.

[0070] Furthermore, since the heat insulation component covers the first area of ​​the gas collecting pipe, when high-temperature, high-pressure emissions enter the gas collecting pipe, they are discharged towards the first area, which is opposite to the second area, under high-pressure impact. The heat insulation component can block these emissions, reducing the risk of leakage from the first area to the outside of the discharge pipe. This allows the emissions to be collected through the gas collecting pipe and discharged in a directed manner, thereby reducing the impact of the high-temperature, high-pressure emissions on other components of the battery device. For example, considering that the high-temperature, high-pressure emissions may include conductive particles, these particles may cause short circuits between multiple components within the battery device, leading to further fire or explosion. Therefore, reducing emissions leakage to the outside of the discharge pipe can reduce further impact on the battery device, lower the risk of explosion, and improve the reliability and stability of the battery device.

[0071] Figure 1 An exploded view of the battery device 10 according to an embodiment of this application is shown. Figure 1 As shown, the battery device 10 of this embodiment includes a housing 11, which can be used to accommodate at least one battery cell 20. The housing 11 of this embodiment has a hollow internal structure, and at least one battery cell 20 is accommodated within the housing 11. Specifically, the housing 11 includes a first housing portion 111 and a second housing portion 112, which are sealed together. For example, the first housing portion 111 and the second housing portion 112 can be snapped together to form a hollow structure. The shape of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components accommodated internally, for example, it can be determined according to the shape of a combination of multiple battery cells 20 accommodated internally.

[0072] In the embodiments of this application, at least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as Figure 1 As shown, the first box portion 111 and the second box portion 112 can both be hollow cuboids with one face as an opening. The openings of the first box portion 111 and the second box portion 112 are arranged opposite to each other, and the first box portion 111 and the second box portion 112 are interlocked to form a box 11 with a closed chamber, which can be used to accommodate at least one battery cell 20.

[0073] For example, unlike Figure 1 As shown, only one of the first housing portion 111 and the second housing portion 112 may be a hollow cuboid with an opening, while the other may be plate-shaped to cover the opening. Taking the first housing portion 111 as a hollow cuboid with one opening and the second housing portion 112 as a plate-shaped example, the second housing portion 112 is used to cover the opening of the first housing portion 111 to form a housing 11 with a closed chamber, which can be used to accommodate at least one battery cell 20.

[0074] like Figure 1 As shown, for ease of explanation, this application embodiment defines three directions: the length direction X of the battery device 10, the width direction Y of the battery device 10, and the height direction Z of the battery device 10. The length direction X, the width direction Y, and the height direction Z are perpendicular to each other, and the size of the battery device 10 in the length direction X is greater than the size in the width direction Y.

[0075] Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 2 It can be Figure 1 A partial structural schematic diagram of the battery device 10 shown; Figure 3 An exploded view of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 3 It can be Figure 2 An exploded view of a portion of the structure of the battery device 10 shown; Figure 4 and Figure 5 The following are partial structural schematic diagrams of the discharge pipe 12 included in the battery device 10 according to embodiments of this application at different angles. Figure 6 A cross-sectional view of a gas collecting pipe 1201 with a heat insulation member 13, according to an embodiment of this application, is shown. The cross-section is perpendicular to the axial direction of the gas collecting pipe 1201. For example, in this embodiment, the axial direction of the gas collecting pipe 1201 is taken as the length direction X of the battery device 10. Figure 6 It can be Figure 5 The diagram shows a partial cross-sectional view of the discharge pipe 12 equipped with the heat insulation component 13.

[0076] like Figures 2 to 6 As shown, the battery device 10 of this application embodiment includes a plurality of battery cells 20, an exhaust pipe 12 and a heat insulation component 13. For example, the plurality of battery cells 20, the exhaust pipe 12 and the heat insulation component 13 can all be accommodated in the housing 11.

[0077] In this embodiment, each battery cell 20 has a pressure relief mechanism 213 provided on the wall 201 of its outer casing 21; the discharge pipe 12 includes a gas collection pipe 1201, which includes a first region 121 and a plurality of second regions 122. The first region 121 and the second region 122 are arranged opposite to each other along the thickness direction of the wall 201. The second region 122 is a second through hole or a weak area. The plurality of second regions 122 correspond one-to-one with the pressure relief mechanisms 213 of the plurality of battery cells 20, so that the gas discharged by the plurality of pressure relief mechanisms 213 passes through the second region 122 and enters the gas collection pipe 1201; the heat insulation member 13 covers the first region 121.

[0078] The battery device 10 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar.

[0079] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0080] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0081] In some embodiments, the battery device 10 may be a battery pack, which includes a housing 11 and one or more battery cell assemblies housed within the housing 11. As an example, the battery cell assembly may be a battery module, which can be housed within the housing 11 by securing the battery module to the housing 11. Alternatively, the battery cell assembly may be housed within the housing 11 by directly securing multiple battery cells 20 to the housing 11.

[0082] The battery cell 20 in this application embodiment can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 20 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application has no particular limitations.

[0083] The battery cell 20 in this embodiment is provided with a pressure relief mechanism 213, which is used to discharge internal gas from the battery cell 20. The pressure relief mechanism 213 can be located on any wall of the outer casing 21 of the battery cell 20. For example, in this embodiment, the pressure relief mechanism 213 is located on wall 201 of the outer casing 21. As an example, when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 213 is activated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism 213 performs an action, or a weak structure provided in the pressure relief mechanism 213 is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0084] As an example, the pressure relief mechanism 213 can be integrally formed with the wall it is located on. As an example, the pressure relief mechanism 213 can also be separately installed and connected to the wall it is located on.

[0085] The term "actuation" as used in this application refers to the pressure relief mechanism 213 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 213 may include, but are not limited to: movement of components within the pressure relief mechanism 213 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 213, etc. When the pressure relief mechanism 213 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as exhaust materials. This method enables pressure and temperature relief of the battery cell 20 under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0086] The emissions from the battery cell 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0087] In this embodiment of the application, the discharge pipe 12 is provided corresponding to the pressure relief mechanism 213 of a plurality of battery cells 20. For example, the discharge pipe 12 may be located outside the wall of the battery cell 20 where the pressure relief mechanism 213 is provided, so that the discharge pipe 12 can collect the emissions of the battery cell 20.

[0088] like Figures 2 to 6 As shown, the discharge pipe 12 includes a gas collection pipe 1201, which includes a first region 121 and a plurality of second regions 122, wherein each first region 121 and its corresponding second region 122 are disposed opposite to each other along the thickness direction of the wall portion 201. For example, Figure 4 and Figure 5 The possible locations of multiple first regions 121 and multiple second regions 122 are shown, but the embodiments of this application are not limited thereto. Taking the thickness direction of the wall portion 201 as the height direction Z of the battery device 10 as an example, the first regions 121 and the second regions 122 are arranged opposite each other along the height direction Z of the battery device 10. Furthermore, the orthographic projection of the first region 121 along the height direction Z of the battery device 10 can cover the second region 122.

[0089] In this embodiment, the multiple second regions 122 also correspond one-to-one with the pressure relief mechanisms 213 of the multiple battery cells 20, so that in the event of thermal runaway of a battery cell 20, the pressure relief mechanism 213 is activated, and the battery cell 20 discharges emissions through the pressure relief mechanism 213. The emissions then enter the gas collection pipe 1201 of the discharge pipeline 12 through the corresponding second region 122. Furthermore, by setting the same gas collection pipe 1201 to correspond to multiple battery cells 20, when any one or more of the multiple battery cells 20 experience thermal runaway, the emissions can enter the gas collection pipe 1201 through the corresponding second region 122, and the gas collection pipe 1201 collects and discharges the emissions from the battery cell 20, simplifying the structure and reducing the structural complexity of the battery device 10.

[0090] It should be understood that the second region 122 is provided in correspondence with the pressure relief mechanism 213, that is, the second region 122 is located on the side of the gas collecting pipe 1201 facing the wall portion 201 where the pressure relief mechanism 213 is located, and in contrast, the first region is located on the side of the gas collecting pipe 1201 away from the wall portion 201 where the pressure relief mechanism 213 is located.

[0091] In some embodiments, the structure of the second region 122 of this application can be configured according to actual applications. For example, the second region 122 may include a second through hole, so that the emissions discharged through the pressure relief mechanism 213 enter the gas collection pipe 1201 of the discharge pipeline 12 through the second through hole. As another example, the second region 122 may include a weak area, so that high-temperature, high-pressure emissions can break through the weak area and enter the gas collection pipe 1201 of the discharge pipeline 12; however, this application is not limited to this. The weak area can be implemented in various ways. For example, the weak area can be made of a temperature-sensitive material that melts under the action of high-temperature emissions, allowing the emissions to pass through. As another example, the thickness of the weak area can be less than the thickness of other areas of the gas collection pipe 1201, so that high-pressure emissions can break through the weak area and enter the gas collection pipe 1201.

[0092] Furthermore, the battery device 10 also includes a heat insulation element 13, which at least covers the first region 121 of the gas collecting pipe 1201. When high-temperature, high-pressure emissions enter the gas collecting pipe 1201 of the discharge pipe 12 through the second region 122, they will be discharged towards the first region 121 opposite to the second region 122 under high pressure. The heat insulation element 13 can block the emissions, reducing the risk of emissions leaking from the first region 121 to the outside of the discharge pipe 12. This allows the emissions to be collected and directionally discharged through the gas collecting pipe 1201 of the discharge pipe 12, thereby reducing the impact of the high-temperature, high-pressure emissions on other components of the battery device 10. For example, considering that the high-temperature, high-pressure emissions may include conductive particles, these particles may cause short circuits between multiple components within the battery device 10, leading to further fire or explosion. Therefore, reducing emissions leakage to the outside of the discharge pipe 12 can reduce further impact on the battery device 10, reduce the risk of explosion, and improve the reliability and stability of the battery device 10.

[0093] The heat insulation component 13 of the present application embodiment will now be described with reference to the accompanying drawings.

[0094] It should be understood that the position of the heat insulation component 13 in this application embodiment can be set according to actual application. For example, the heat insulation component 13 can be located outside the gas collecting pipe 1201. In this way, when high-temperature and high-pressure emissions are discharged toward the first region 121, even if the first region 121 of the gas collecting pipe 1201 is melted through, the heat insulation component 13 provided outside the first region 121 can block the emissions, thereby reducing the risk of emissions leaking to the outside of the gas collecting pipe 1201. This allows the emissions to be collected through the gas collecting pipe 1201 and discharged in a directional manner, thereby reducing the impact of the high-temperature and high-pressure emissions on other components of the battery device 10.

[0095] For example, the heat insulation component 13 is located inside the gas collection pipe 1201 of the discharge pipe 12. When the high-temperature and high-pressure emissions are discharged toward the first region 121, the heat insulation component 13 covers the first region 121. Under the blocking effect of the heat insulation component 13, the risk of the emissions melting through the first region 121 can be reduced, which also reduces the risk of the emissions leaking to the outside of the gas collection pipe 1201. This allows the emissions to be collected and discharged in a directional manner through the gas collection pipe 1201 of the discharge pipe 12, thereby reducing the impact of the high-temperature and high-pressure emissions on other components of the battery device 10.

[0096] For ease of explanation, the embodiments of this application are mainly described with the example of the heat insulation component 13 being located inside the gas collecting pipe 1201, so as to illustrate the structure of the heat insulation component 13. However, the relevant description is also applicable to the case where the heat insulation component 13 is located outside the gas collecting pipe 1201, and will not be repeated here.

[0097] It should be understood that the number of heat insulation components 13 in the embodiments of this application can be set according to actual applications. For example, the number of heat insulation components 13 can be set according to the number of first regions 121, and each first region 121 can correspond to one or more second regions 122.

[0098] In some embodiments, the gas collecting pipe 1201 includes a plurality of first regions 121, each corresponding to a plurality of second regions 122, and the battery device 10 includes a plurality of heat insulation members 13, each corresponding to a plurality of first regions 121. For example, Figures 2 to 6 As shown, taking the battery device 10 as an example, which includes multiple battery cells 20 arranged along its length direction X, the axial direction of the gas collection pipe 1201 of the discharge pipe 12 is also along the length direction X of the battery device 10. The multiple first regions 121 and multiple second regions 122 included in the gas collection pipe 1201 are also arranged along the length direction X of the battery device 10. Similarly, multiple heat insulation members 13 are arranged along the length direction X of the battery device 10, so that each heat insulation member 13 covers one first region 121. This can reduce the area covered by the heat insulation members 13. For example, the area between multiple first regions 121 in the gas collection pipe 1201 may not be covered by heat insulation members 13, thereby reducing the total weight and volume of all heat insulation members 13 included in the battery device 10, increasing the internal space of the gas collection pipe 1201, accelerating the emission rate of emissions, and also increasing the energy density of the battery device 10.

[0099] In some embodiments, the first region 121 corresponds to a plurality of second regions 122, and correspondingly, the heat insulation member 13 extends along the arrangement direction of the plurality of second regions 122 and covers the first region 121 corresponding to the plurality of second regions 122. For example, as Figures 2 to 6 As shown, taking the battery device 10 as an example, which includes multiple battery cells 20 arranged along its length direction X, the axial direction of the gas collection pipe 1201 of the discharge pipe 12 is also along the length direction X of the battery device 10, and the multiple second regions 122 included in the gas collection pipe 1201 are also arranged along the length direction X of the battery device 10. However, unlike... Figure 4 As shown, the gas collecting pipe 1201 may include at least one first region 121, each first region 121 extending along the length direction X of the battery device 10 to correspond to a plurality of second regions 122. The heat insulation member 13 may also extend along the length direction X of the battery device 10, that is, the heat insulation member 13 may be a long strip structure extending along the length direction X of the battery device 10, so that the heat insulation member 13 can cover the first region 121 corresponding to the plurality of second regions 122, thereby reducing the number of heat insulation members 13, so as to simplify the assembly between the heat insulation member 13 and the gas collecting pipe 1201 and improve the processing efficiency of the battery device 10.

[0100] For example, each gas collecting pipe 1201 may be provided with a first region 121, which corresponds to all the second regions 122. Correspondingly, a heat insulation element 13 may be provided in the gas collecting pipe 1201, which covers the first region 121, so that the number of heat insulation elements 13 is minimized, which facilitates the assembly between the heat insulation element 13 and the gas collecting pipe 1201.

[0101] For example, each gas collecting pipe 1201 may also be provided with multiple heat insulation components 13, and the first region 121 of each heat insulation component 13 corresponds to multiple second regions 122, and the number of second regions 122 corresponding to the first region 121 covered by different heat insulation components 13 may be the same or different.

[0102] It should be understood that, along the axial direction of the gas collecting pipe 1201, the first region 121 covered by the heat insulation element 13 can correspond to at least one second region 122, and along the circumferential direction of the gas collecting pipe 1201, the size of each heat insulation element 13 can also be set according to the actual application.

[0103] In some embodiments, such as Figure 5 and Figure 6 As shown, the gas collecting pipe 1201 includes a first wall 123, which includes a first region 121. The heat insulation member 13 covers at least a portion of the first wall 123. For example, the heat insulation member 13 covers at least the first region 121 of the first wall 123 along the circumferential direction of the gas collecting pipe 1201; or, the heat insulation member 13 covers at least the first wall 123 along the circumferential direction of the gas collecting pipe 1201. In this way, the heat insulation member 13 disposed on the first wall 123 along the circumferential direction of the gas collecting pipe 1201 can at least protect the first region 121, and can also reduce the size of the heat insulation member 13, thereby reducing the total mass of all heat insulation members 13 included in the battery device 10, and thus increasing the energy density of the battery device 10.

[0104] It should be understood that the shape of the gas collecting pipe 1201 in this application embodiment can be set according to actual application. For example, the cross-sectional shape of the gas collecting pipe 1201 can be circular, rectangular, rounded rectangle, oval or other polygonal, wherein the cross-section of the gas collecting pipe 1201 is perpendicular to the axial direction of the gas collecting pipe 1201.

[0105] For ease of description, the embodiments of this application mainly take the cross-section of the gas collecting pipe 1201 as an example of an oval shape. The first wall 123 is the wall of the gas collecting pipe 1201 with the first region 121 provided, that is, the first wall 123 is the wall of the gas collecting pipe 1201 away from the pressure relief mechanism 213. However, the embodiments of this application are not limited to this.

[0106] In some embodiments, the first wall 123 is provided with a groove 1231 with an opening facing the second region 122, and the heat insulation member 13 is accommodated in the groove 1231. On the one hand, this facilitates the installation of the heat insulation member 13 and also restricts the position of the heat insulation member 13, reducing the risk of displacement of the heat insulation member 13, so as to effectively protect the first region 121. On the other hand, when the thickness of the heat insulation member 13 and the thickness of the wall of the gas collecting pipe 1201 are constant, placing the heat insulation member 13 in the groove 1231 can increase the internal space of the gas collecting pipe 1201, improve the emission efficiency of the emissions, and thus improve the reliability of the battery device 10.

[0107] Figure 7 This application shows another partial structural schematic diagram of the discharge pipe 12 according to an embodiment of the present application, for example, different from... Figure 5 The discharge pipe 12 shown is equipped with a heat insulation component 13. Figure 7 This could be another possible arrangement for the insulation element 13; Figure 8 A cross-sectional schematic diagram of a gas collecting pipe 1201 equipped with a heat insulation member 13, according to an embodiment of this application, is shown, wherein the cross-section is perpendicular to the axial direction of the gas collecting pipe 1201. For example, Figure 8 It can be Figure 7 The diagram shows a partial cross-sectional view of the discharge pipe 12 equipped with a heat insulation component 13.

[0108] In some embodiments, such as Figure 7 and Figure 8 As shown, the gas collecting pipe 1201 includes an intersecting first wall 123 and a second wall 124. The first wall 123 includes a first region 121. The heat insulation member 13 includes an intersecting main body 131 and an extension 132. The main body 131 covers the first region 121 of the first wall 123, and the extension 132 covers at least a portion of the second wall 124. Thus, along the circumference of the gas collecting pipe 1201 of the discharge pipe 12, the heat insulation member 13 corresponds to at least two walls of the gas collecting pipe 1201, increasing the coverage area of ​​the heat insulation member 13, further protecting more areas of the gas collecting pipe 1201, reducing the impact of high-temperature and high-pressure emissions on the gas collecting pipe 1201, thereby reducing the risk of emissions leakage. This allows emissions to be collected and directionally discharged through the gas collecting pipe 1201, reducing the impact of the high-temperature and high-pressure emissions on other components inside the casing 11 of the battery device 10.

[0109] In some embodiments, such as Figure 7 and Figure 8As shown, the gas collecting pipe 1201 includes two opposing second walls 124, and the heat insulation member 13 includes two opposing extensions 132, such that each extension 132 covers at least a portion of the corresponding second wall 124. On the one hand, considering that the gas collecting pipe 1201 of the discharge pipe 12 is generally a symmetrical structure, providing the heat insulation member 13 with two extensions 132 to cover at least a portion of the two second walls 124 respectively can improve the structural stability of the heat insulation member 13, facilitate fixation, reduce the risk of displacement of the heat insulation member 13, and thus improve the reliability of the heat insulation member 13. On the other hand, increasing the coverage area of ​​the heat insulation member 13 can protect the second walls 124 of the gas collecting pipe 1201, thereby reducing the impact of high-temperature and high-pressure emissions on the second walls 124 of the gas collecting pipe 1201, and thus reducing the risk of emissions leakage.

[0110] like Figure 7 and Figure 8 As shown, the main body 131 of the heat insulation member 13 can cover the entire area of ​​the first wall 123, and the extension 132 connected to the main body 131 can cover at least a portion of the second wall 124. For example, each extension 132 can cover only a local area of ​​the second wall 124 to control the weight and volume of the heat insulation member 13, thereby reducing the total mass of the battery device 10, improving the space utilization of the battery device 10, and thus increasing the energy density of the battery device 10. Alternatively, each extension 132 can also cover the entire area of ​​the second wall 124 to protect the entire area of ​​the second wall 124, improving the stability and reliability of the heat insulation member 13.

[0111] Figure 9 This illustration shows another partial structural diagram of the discharge pipe 12 according to an embodiment of the present application, for example, different from... Figure 5 and Figure 7 The discharge pipe 12 shown is equipped with a heat insulation component 13. Figure 9 This could be another possible configuration for the insulation element 13. Figure 10 A cross-sectional schematic diagram of a gas collecting pipe 1201 equipped with a heat insulation member 13, according to an embodiment of this application, is shown, wherein the cross-section is perpendicular to the axial direction of the gas collecting pipe 1201. For example, Figure 10 It can be Figure 9 The diagram shows a partial cross-sectional view of the discharge pipe 12 equipped with the heat insulation component 13. Figure 11 A partial structural schematic diagram of the heat insulation member 13 according to an embodiment of this application is shown. For example, the... Figure 11 The heat insulation element 13 shown can be Figure 9 and Figure 10 The heat insulation component 13 shown.

[0112] In some embodiments, such as Figures 9 to 11As shown, the shape of the heat insulation component 13 is the same as that of the gas collecting pipe 1201, so that the heat insulation component 13 and the gas collecting pipe 1201 are stacked together radially along the gas collecting pipe 1201. The structure is simple and easy to assemble the heat insulation component 13 and the gas collecting pipe 1201. The heat insulation component 13 is provided with a clearance hole 133, which is used to avoid the second area 122, so as to reduce the obstruction of the heat insulation component 13 to the exhaust entering the gas collecting pipe 1201, so that the exhaust can quickly enter the gas collecting pipe 1201 and be discharged.

[0113] In some embodiments, where the first region 121 covered by each heat insulation member 13 corresponds to a plurality of second regions 122, the clearance hole 133 of the heat insulation member 13 can be used to clear one or more second regions 122.

[0114] For example, each heat insulation element 13 may be provided with only one clearance hole 133, which can avoid all the multiple second regions 122 corresponding to the heat insulation element 13, so as to reduce the number of clearance holes 133 provided and facilitate processing.

[0115] For example, each insulation element 13 may be provided with multiple clearance holes 133, each clearance hole 133 may be used to avoid one or more second regions 122, so as to increase structural flexibility.

[0116] For example, such as Figures 9 to 11 As shown, the heat insulation component 13 is provided with multiple clearance holes 133, which correspond one-to-one with multiple second areas 122, so that the heat insulation component 13 can cover more areas of the gas collecting pipe 1201, protect the gas collecting pipe 1201, and reduce the risk of high temperature and high pressure emissions melting through the gas collecting pipe 1201 and causing emissions leakage. This allows the emissions to be collected through the gas collecting pipe 1201 and discharged in a directional manner, thereby reducing the impact of the high temperature and high pressure emissions on other components of the battery device 10.

[0117] It should be understood that the heat insulation element 13 described above can be located inside or outside the gas collecting pipe 1201. In some embodiments, the heat insulation element 13 can also replace a local area of ​​the gas collecting pipe 1201.

[0118] Figure 12 and Figure 13 Two different partially exploded structural diagrams of the discharge pipe 12 and the heat insulation component 13 according to embodiments of this application are shown. Figure 12 and Figure 13As shown, the gas collecting pipe 1201 includes a first wall 123, which includes a first region 121. The first region 121 is a first through hole 1232, so that the heat insulation member 13 covers the first through hole 1232. That is, the heat insulation member 13 replaces the first region 121 of the gas collecting pipe 1201. After the high-temperature and high-pressure emissions enter the gas collecting pipe 1201, they come into contact with the heat insulation member 13 in the first region 121. The heat insulation member 13 can prevent the emissions from leaking from the first region 121, so that the emissions can be collected and discharged in a directional manner through the gas collecting pipe 1201, thereby reducing the impact of the high-temperature and high-pressure emissions on other components of the battery device 10. Furthermore, the first through hole 1232 provided in the gas collecting pipe 1201 can reduce the total weight of the discharge pipe 12, thereby reducing the total weight of the battery device 10 and increasing the energy density of the battery device 10.

[0119] In some embodiments, the heat insulation member 13 of this application embodiment may be located on the side of the first through hole 1232 facing the interior of the gas collecting pipe 1201, or it may be located on the side of the first through hole 1232 away from the interior of the gas collecting pipe 1201. For example, the edge of the heat insulation member 13 may be fixed to the area surrounding the first through hole 1232 of the first wall 123, so that the heat insulation member 13 can completely cover the first through hole 1232, reducing the risk of leakage of emissions from the gap between the first through hole 1232 and the heat insulation member 13, and improving the reliability of the heat insulation member 13 and the emission pipe 12.

[0120] In some embodiments, at least a portion of the heat insulation element 13 is accommodated in the first through hole 1232. This increases the contact area between the heat insulation element 13 and the gas collecting pipe 1201, facilitating the fixation of the heat insulation element 13 and the gas collecting pipe 1201 and improving structural stability. In addition, it can increase the thickness of the heat insulation element 13, thereby improving the structural strength of the heat insulation element 13, reducing the risk of emissions damaging the heat insulation element 13, and improving the reliability of the heat insulation element 13.

[0121] It should be understood that the number of second regions 122 corresponding to the first through hole 1232 in the embodiments of this application can be set according to the actual application, that is, each first through hole 1232 can correspond to one or more second regions 122.

[0122] In some embodiments, the first through hole 1232 corresponds to a plurality of second regions 122, and the first through hole 1232 penetrates the first wall 123 along the arrangement direction of the plurality of second regions 122. For example... Figure 12As shown, taking the gas collecting pipe 1201 as an example, which includes multiple second regions 122 arranged along the length X of the battery device 10, the first through hole 1232 penetrates the first wall 123 along the length X of the battery device 10. Correspondingly, the heat insulation member 13 extends along the length X of the battery device 10, that is, the heat insulation member 13 can be a long strip structure extending along the length X of the battery device 10. Then, the heat insulation member 13 can cover the first through hole 1232 to correspond to the multiple second regions 122 of the gas collecting pipe 1201. In this way, the number of heat insulation members 13 can be reduced, the structure can be simplified, the processing can be facilitated, and the assembly of the heat insulation member 13 and the gas collecting pipe 1201 can be facilitated.

[0123] In some embodiments, the first wall 123 includes a plurality of first through holes 1232, each of which corresponds to a plurality of second regions 122. The battery device 10 includes a plurality of heat insulation elements 13, each of which corresponds to a plurality of first through holes 1232. Figure 13 As shown, the first wall 123 includes a plurality of first through holes 1232 arranged along the length X of the battery device 10, and a plurality of heat insulation members 13 are also arranged along the length X of the battery device 10, such that each heat insulation member 13 covers one first through hole 1232. Considering that the weight of the heat insulation member 13 is usually greater than that of the gas collecting pipe 1201 for the same volume, by providing a plurality of heat insulation members 13, the total volume of the heat insulation members 13 can be reduced, and thus the weight of the heat insulation members 13 can be reduced, thereby reducing the weight of the battery device 10 and increasing the energy density of the battery device 10.

[0124] It should be understood that the heat insulation member 13 and the first through hole 1232 of the gas collecting pipe 1201 in this embodiment of the application can be fixed in a variety of ways. For example, the heat insulation member 13 and the gas collecting pipe 1201 can be snapped together. For example, the position of the heat insulation member 13 can be restricted by adjusting the size of different areas of the heat insulation member 13 and the size of the first through hole 1232.

[0125] Figure 14 This diagram shows a top view of a portion of the structure of the gas collecting pipe 1201 without the heat insulation component 13 installed, according to an embodiment of this application. Figure 14 The gas collecting pipe 1201 shown can be Figure 13 A partial structural schematic diagram of the gas collection pipe 1201 of the discharge pipeline 12 shown; Figure 15 This illustration shows a partial cross-sectional view of the gas collecting pipe 1201 without the heat insulation component 13 installed, according to an embodiment of this application. Figure 15 It can be Figure 14 The cross-sectional diagram along the A-A' direction is shown. Figure 16 This paper shows a top view of a partial structure of the gas collecting pipe 1201 with the heat insulation component 13 installed according to an embodiment of this application. For example, Figure 16The gas collecting pipe 1201 shown can be Figure 13 A partial structural schematic diagram of the heat insulation component 13 and the discharge pipe 12 shown; Figure 17 This illustration shows a partial cross-sectional view of the gas collecting pipe 1201 with the heat insulation component 13 installed according to an embodiment of this application. For example, Figure 17 It can be Figure 16 The cross-sectional view along the B-B' direction is shown.

[0126] In some embodiments, such as Figures 14 to 17 As shown, along the arrangement direction of the plurality of second regions 122: the maximum length L4 of the edge region of the heat insulation member 13 is greater than the maximum length L3 of the middle region of the heat insulation member 13; the maximum length L2 of the edge region of the first through hole 1232 is greater than the maximum length L1 of the middle region of the first through hole 1232; and the maximum length L6 of the surface of the first through hole 1232 facing the inside of the gas collecting pipe 1201 is greater than the maximum length L5 of the surface of the first through hole 1232 facing the outside of the gas collecting pipe 1201. By setting the above dimensions, the position of the heat insulation member 13 within the first through hole 1232 can be restricted, reducing the misalignment of the heat insulation member 13, lowering the risk of emission leakage caused by the misalignment of the heat insulation member 13, and thereby improving the reliability of the battery device 10.

[0127] like Figures 14 to 17 As shown, taking the arrangement direction of the multiple second regions 122 as the axial direction of the gas collecting pipe 1201 and the length direction X of the battery device 10 as an example, along the width direction Y of the battery device 10, the edge region of the heat insulation member 13 is located outside the middle region of the heat insulation member 13, and the edge region of the first through hole 1232 is located outside the middle region of the first through hole 1232. For example, the edge region of the heat insulation member 13 is closer to the second wall 124 intersecting with the first wall 123, and correspondingly, the edge region of the first through hole 1232 is also closer to the second wall 124 intersecting with the first wall 123; or at least a portion of the edge region of the heat insulation member 13 is located on the second wall 124, and correspondingly, at least a portion of the edge region of the first through hole 1232 is located on the second wall 124.

[0128] It should be understood that the material of the gas collecting pipe 1201 in this application embodiment can be set according to actual application, and the material of the heat insulation component 13 can also be set according to actual application.

[0129] In some embodiments, the material of the gas collecting pipe 1201 is different from that of the heat insulation component 13. For example, the heat insulation component 13 is usually made of a high-temperature resistant material to resist the impact of high-temperature and high-pressure emissions; while the material of the gas collecting pipe 1201 can have relatively weaker heat resistance compared to the material of the heat insulation component 13, so as to reduce the difficulty of material selection and facilitate processing.

[0130] In some embodiments, the gas collecting pipe 1201 is made of plastic, and the heat insulation component 13 is made of sheet metal. Using plastic for the gas collecting pipe 1201 facilitates processing and reduces its weight, thus decreasing the overall weight of the battery device 10. Using sheet metal for the heat insulation component 13 effectively improves its structural strength, reduces the risk of emissions melting through the heat insulation component 13, thereby reducing the risk of emissions leakage and improving the reliability of the battery device 10.

[0131] It should be understood that the gas collecting pipe 1201 and the heat insulation component 13 in this application embodiment can be processed and fixed in various ways. For example, the gas collecting pipe 1201 and the heat insulation component 13 can be processed and fixed by injection molding. For example, when the gas collecting pipe 1201 is plastic and the heat insulation component 13 is metal, the sheet metal part can be embedded with the plastic gas collecting pipe 1201 by in-mold injection molding to achieve processing and fixing of the two. Another example is that the gas collecting pipe 1201 and the heat insulation component 13 can be fixed by adhesive bonding. Yet another example is that the gas collecting pipe 1201 and the heat insulation component 13 can also be fixed by welding. For example, when both the gas collecting pipe 1201 and the heat insulation component 13 are metal, welding can be used for fixing. Yet another example is that the gas collecting pipe 1201 and the heat insulation component 13 can also be fixed by snap-fit. This application embodiment is not limited to these methods.

[0132] In some embodiments, the material of the gas collecting pipe 1201 and / or the material of the heat insulation component 13 satisfies at least one of the following conditions: the melting point is in the range of [350°C, 650°C]; the volume resistivity is in the range of [10...]. 15 Ω·cm, 10 16 The dielectric strength ranges from [25kV / mm to 55kV / mm] and the flame retardant rating is UL94 V0. This reduces the risk of emissions damaging the gas collection pipe 1201 and / or the insulation component 13, and improves the structural stability and reliability of the gas collection pipe 1201 and / or the insulation component 13.

[0133] In some embodiments, the gas collecting pipe 1201 and / or the heat insulation component 13 have melting points ranging from 350°C to 650°C. Limiting the melting point to 350°C or higher improves the high-temperature resistance of the gas collecting pipe 1201 and / or the heat insulation component 13, reducing damage to the gas collecting pipe 1201 and / or the heat insulation component 13 from high-temperature emissions, thereby reducing the risk of emissions leakage. Conversely, limiting the melting point to 650°C or lower reduces the difficulty in selecting materials for the gas collecting pipe 1201 and / or the heat insulation component 13, thus reducing costs.

[0134] In some embodiments, the melting point of the gas collecting pipe 1201 and / or the heat insulation component 13 of this application embodiment may also be any of the following values ​​or between any two of the following values: 350°C, 380°C, 400°C, 430°C, 450°C, 480°C, 500°C, 530°C, 550°C, 580°C, 600°C, 630°C, or 650°C.

[0135] It should be understood that the melting point of the embodiments of this application can be obtained by standard ISO 11357-1 / -3 testing.

[0136] In some embodiments, the gas collecting pipe 1201 and / or the heat insulation element 13 satisfy the requirement that the volume resistivity ranges from

[10] . 15 Ω·cm, 10 16 [Ω·cm]. Set the volume resistivity to be greater than or equal to 10. 15 A volume resistivity of Ω·cm can improve the insulation performance of the gas collecting pipe 1201 and / or the heat insulation component 13, reducing the risk of short circuits in the internal components of the battery device 10. The volume resistivity is limited to less than or equal to 10 Ω·cm. 16 The Ω·cm value can reduce the difficulty of selecting materials for the gas collecting pipe 1201 and / or the heat insulation component 13, thereby reducing costs.

[0137] In some embodiments, the volume resistivity of the gas collecting pipe 1201 and / or the heat insulation component 13 in this application embodiment may also take any of the following values ​​or be between any two of the following values: 10 15 Ω·cm, 2*10 15 Ω·cm, 3*10 15 Ω·cm, 4*10 15 Ω·cm, 5*10 15 Ω·cm, 6*10 15 Ω·cm, 7*10 15 Ω·cm, 8*10 15 Ω·cm, 9*10 15 Ω·cm or 10 16 Ω·cm.

[0138] It should be understood that the volume resistivity in the embodiments of this application refers to the impedance of a material per unit volume to current. Furthermore, the volume resistivity can be obtained through testing according to standard IEC 60093.

[0139] In some embodiments, the gas collecting pipe 1201 and / or the heat insulation component 13 satisfy a dielectric strength range of [25kV / mm, 55kV / mm]. Setting the dielectric strength to be greater than or equal to 25kV / mm can improve the insulation performance of the gas collecting pipe 1201 and / or the heat insulation component 13 under the action of an electric field, thereby improving the structural stability and reliability of the battery device 10. Conversely, limiting the dielectric strength to less than or equal to 55kV / mm can reduce the difficulty of selecting materials for the gas collecting pipe 1201 and / or the heat insulation component 13, thus reducing costs.

[0140] In some embodiments, the dielectric strength of the gas collecting pipe 1201 and / or the heat insulation component 13 of this application embodiment may also take any of the following values ​​or be between any two of the following values: 25kV / mm, 28kV / mm, 30kV / mm, 33kV / mm, 35kV / mm, 38kV / mm, 40kV / mm, 43kV / mm, 45kV / mm, 48kV / mm, 50kV / mm, 53kV / mm or 55kV / mm.

[0141] It should be understood that the dielectric strength in the embodiments of this application refers to the maximum voltage per unit thickness that the sample can withstand when it is broken down. Furthermore, the dielectric strength can be obtained through testing according to standard IEC 60243-1.

[0142] In some embodiments, the gas collecting pipe 1201 and / or the heat insulation component 13 meet the UL94 V0 flame retardant rating to improve the flame retardant performance of the gas collecting pipe 1201 and / or the heat insulation component 13, reduce the risk of combustion of the gas collecting pipe 1201 and / or the heat insulation component 13, and also reduce the risk of heat diffusion within the battery device 10.

[0143] It should be understood that the flame retardant rating of the embodiments of this application was obtained by testing according to the UL 94 standard.

[0144] In some embodiments, the materials of the gas collecting pipe 1201 and / or the heat insulation component 13 may be metal or plastic to meet the above parameter limitations. For example, the plastic material may be flame-retardant reinforced high-performance nylon, reinforced liquid crystal polymer, etc., giving it characteristics such as high strength, high rigidity, high heat resistance, and high dimensional stability.

[0145] It should be understood that the gas collection pipe 1201 of the emission pipe 12 in this embodiment of the application and the battery cell 20 can be relatively fixed in various ways. This will be described below with reference to the accompanying drawings.

[0146] In some embodiments, the discharge pipe 12 further includes a plurality of connecting pipes 1202, each connecting pipe 1202 being disposed between the corresponding pressure relief mechanism 213 and the second region 122, so that the emissions discharged by the pressure relief mechanism 213 enter the gas collection pipe 1201 through the connecting pipe 1202 and the second region 122. The connecting pipe 1202 can be used to connect the wall portion 201 where the pressure relief mechanism 213 is located and the gas collection pipe 1201, so that in the event of thermal runaway of the battery cell 20, the pressure relief mechanism 213 is actuated, the battery cell 20 discharges emissions through the pressure relief mechanism 213, the emissions reach the second region 122 through the connecting pipe 1202, and then enter the gas collection pipe 1201 through the second region 122, thereby realizing the collection and directional discharge of emissions.

[0147] It should be understood that the connecting pipe 1202 in the embodiments of this application can be implemented in a variety of ways. Figure 18 A side view schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 18 It can be Figures 1 to 3 A side view of a partial structure of the battery device 10 shown; Figure 19 A cross-sectional schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 19 It can be along Figure 18 A partially enlarged view of the cross-sectional view along the C-C' direction shown.

[0148] In the embodiments of this application, such as Figures 18 to 19 As shown, each connecting tube 1202 includes a first limiting part 215 and a second limiting part 14. The first limiting part 215 surrounds the pressure relief mechanism 213 and is disposed on the outer surface of the battery cell 20. The second limiting part 14 is disposed around the second region 122, which is a second through hole. The first limiting part 215 and the second limiting part 14 cooperate with each other to form the connecting tube 1202.

[0149] In this embodiment, the first limiting portion 215 can be disposed on the wall portion 201 of the battery cell 20. This first limiting portion 215 surrounds the pressure relief mechanism 213, meaning it is located in at least a portion of the area surrounding the pressure relief mechanism 213. For example, as... Figures 18 to 19 As shown, the first limiting part 215 can surround the pressure relief mechanism 213; or, unlike... Figures 18 to 19 As shown, the first limiting part 215 can occupy only a local area around the pressure relief mechanism 213 to simplify the structure.

[0150] like Figures 18 to 19As shown, the first limiting part 215 is disposed on the outer surface of the wall portion 201 of the battery cell 20 where the pressure relief mechanism 213 is disposed. For example, in this embodiment, the pressure relief mechanism 213 is located on the cover plate 212 of the outer casing 21 of the battery cell 20, i.e., the wall portion 201 is the cover plate 212. Then the first limiting part 215 is also located on the cover plate 212 and disposed on the outer surface of the cover plate 212. The outer surface of the cover plate 212 is the side surface of the cover plate 212 away from the interior of the battery cell 20. The first limiting part 215 protrudes from the outer surface of the cover plate 212 and extends in a direction away from the outer surface.

[0151] In this embodiment of the application, the discharge pipe 12 is disposed on the side of the cover plate 212 where the pressure relief mechanism 213 is located, away from the interior of the battery cell 20. The discharge pipe 12 has a hollow structure for collecting and discharging emissions from the battery cell 20. Figures 18 to 19 As shown, the gas collection pipe 1201 of the discharge pipe 12 includes a second region 122, and multiple second regions 122 correspond one-to-one with the pressure relief mechanisms 213 of multiple battery cells 20. The second region 122 may be located on the side of the gas collection pipe 1201 of the discharge pipe 12 facing the cover plate 212, so that the second region 122 faces the pressure relief mechanism 213.

[0152] In the embodiments of this application, each of the plurality of second limiting portions 14 is disposed around the corresponding second region 122, that is, the second limiting portion 14 is connected to the gas collecting pipe 1201, and the second limiting portion 14 is located in at least a portion of the area surrounding the second region 122. For example, the second limiting portion 14 may surround the second region 122; or, the second limiting portion 14 may occupy only a partial area surrounding the second region 122 to simplify the structure.

[0153] In this embodiment, the second limiting part 14 protrudes relative to the gas collecting pipe 1201 toward the pressure relief mechanism 213 of the battery cell 20, while the first limiting part 215 protrudes toward the gas collecting pipe 1201. The first limiting part 215 and the second limiting part 14 can cooperate to form a connecting pipe 1202 for the discharge through-hole. This also fixes the gas collecting pipe 1201 connected to the second limiting part 14 and the battery cell 20 with the first limiting part 215, and the second region 122 is positioned corresponding to the pressure relief mechanism 213. Thus, in the event of thermal runaway in the battery cell 20, the pressure relief mechanism 213 is activated, and the battery cell 20 discharges emissions through the pressure relief mechanism 213. These emissions pass through the cooperating first limiting part 215 and the second limiting part 14 and enter the gas collecting pipe 1201 through the second region 122. The gas collecting pipe 1201 can then collect and discharge the emissions, reducing the impact of the high-temperature, high-pressure emissions on other components of the battery device 10. For example, considering that the high-temperature and high-pressure emissions may include conductive particles, which may cause short circuits between multiple components within the battery device 10, leading to further fires or explosions, collecting and discharging these emissions through the discharge pipe 12 can reduce further impacts on the battery device 10, lower the risk of explosion, and improve the reliability and stability of the battery device 10.

[0154] In addition, the relative position between the second region 122 of the gas collection pipe 1201 and the pressure relief mechanism 213 of the battery cell 20 in this embodiment can be fixed by the mutual cooperation of the first limiting part 215 and the second limiting part 14. This design of at least two components cooperating with each other has a certain offset during the installation process. These offsets can be used to absorb the tolerances between multiple battery cells 20 in the length, width or height direction, thereby improving the assembly efficiency of the battery device 10.

[0155] In this embodiment, the battery device 10 includes a plurality of battery cells 20, and the gas collection pipe 1201 of the discharge pipe 12 includes a plurality of second regions 122, and is connected by a plurality of second limiting parts 14, so that the plurality of second regions 122 correspond to the pressure relief mechanisms 213 of the plurality of battery cells 20. The second region 122 can be a second through hole, or it can be a weak area. Figures 18 to 19As shown, the battery device 10 of this application embodiment may include a plurality of battery cells 20. For example, the battery device 10 may include a plurality of battery cells 20 arranged along the length direction X of the battery device 10. Correspondingly, the gas collecting pipe 1201 may include a plurality of second regions 122 arranged along the length direction X of the battery device 10. The plurality of second regions 122 correspond to a plurality of second limiting parts 14. The plurality of second regions 122 correspond one-to-one with the pressure relief mechanism 213 of the plurality of battery cells 20, and the plurality of second limiting parts 14 correspond one-to-one with the first limiting parts 215 of the plurality of battery cells 20. In this way, the same gas collecting pipe 1201 can be used to correspond to the plurality of battery cells 20. When any of the plurality of battery cells 20 experiences thermal runaway, the emissions of the battery cells 20 can be collected through the gas collecting pipe 1201, simplifying the structure and reducing the structural complexity of the battery device 10.

[0156] In some embodiments, the battery device 10 may include a plurality of battery cell assemblies. For example, the battery device 10 may include a plurality of battery cell assemblies arranged along the width direction Y of the battery device 10. Each battery cell assembly includes a plurality of battery cells 20. For example, each battery cell assembly may include a plurality of battery cells 20 arranged along the length direction X of the battery device 10. The battery device 10 may include a plurality of gas collection pipes 1201, which correspond one-to-one with the plurality of battery cell assemblies to collect emissions from the battery cells 20 included in the corresponding battery cell assembly.

[0157] In some embodiments, the housing 11 is provided with a discharge port 113, which is used to discharge the emissions from the discharge pipe 12 to the outside of the battery device 10, thereby reducing the impact of high-temperature and high-pressure emissions on other components inside the housing 11 of the battery device 10, reducing the risk of short circuits or even explosions, and improving the reliability and stability of the battery device 10; and, by reasonably setting the position of the discharge port 113, high-temperature and high-pressure emissions can be discharged in a directional manner to suit different application scenarios.

[0158] It should be understood that the housing 11 in this embodiment of the application may be provided with one or more discharge ports 113, and the position of each discharge port 113 may be set according to the actual application. For example, the discharge port 113 may be located in the first housing part 111 and / or the second housing part 112. For example, the housing 11 may be provided with one discharge port 113, and multiple gas collecting pipes 1201 in the battery device 10 may converge to the discharge port 113; or, for example, the housing 11 may be provided with multiple discharge ports 113 for connecting different gas collecting pipes 1201, thereby improving the design flexibility of the battery device 10.

[0159] The following description, in conjunction with the accompanying drawings, will focus on the discharge pipe 12 corresponding to any single battery cell 20 within the battery device 10 of this application embodiment.

[0160] In this embodiment, the relative positions of the first limiting part 215 and the second limiting part 14 can be set according to the actual application.

[0161] In some embodiments, the second limiting portion 14 is sleeved on the outside of the first limiting portion 215, away from the pressure relief mechanism 213. For example... Figures 18 to 19 As shown, the second limiting part 14 is sleeved on the outside of the first limiting part 215, that is, along the radial direction of the second region 122, the second limiting part 14 is located on the outside, and the first limiting part 215 is located on the inside. Considering that when the battery cell 20 experiences thermal runaway, the emissions discharged from the lower battery cell 20 are discharged upward after passing through the pressure relief mechanism 213 and enter the gas collection pipe 1201 through the second region 122, compared to the scheme of sleeved first limiting part 215 on the second limiting part 14, the case where the second limiting part 14 is sleeved on the outside of the first limiting part 215 can reduce the emissions overflowing through the gap between the first limiting part 215 and the second limiting part 14, thus reducing the impact of these emissions on other battery cells 20 and other components in the battery device 10, reducing the risk of short circuits or even explosions in the battery device 10, and improving the reliability and stability of the battery device 10.

[0162] It should be understood that the first limiting part 215 and the second limiting part 14 in the embodiments of this application can be implemented in a variety of ways.

[0163] In some embodiments, the first limiting portion 215 has a protrusion structure 2151, and the second limiting portion 14 has a groove structure 141, wherein the protrusion structure 2151 of the first limiting portion 215 is at least partially accommodated in the groove structure 141 of the second limiting portion 14. Figures 18 to 19 As shown, taking the second limiting part 14 sleeved on the outside of the first limiting part 215 away from the pressure relief mechanism 213 as an example, the outer circumferential direction of the first limiting part 215 has a protruding structure 2151 protruding towards the second limiting part 14, and the inner circumferential direction of the second limiting part 14 has a recessed structure 141 recessed away from the first limiting part 215. When the protruding structure 2151 of the first limiting part 215 is at least partially accommodated in the recessed structure 141 of the second limiting part 14, the first limiting part 215 and the second limiting part 14 can restrict each other, thereby achieving fixation. The structure is simple and easy to implement.

[0164] Or, with Figures 18 to 19 The two limiting parts are set differently. The first limiting part 215 has a groove structure, and the second limiting part 14 has a protrusion structure. The protrusion structure of the second limiting part 14 is at least partially accommodated in the groove structure of the first limiting part 215. In this way, the first limiting part 215 and the second limiting part 14 can restrict each other and thus achieve fixation. The structure is simple and easy to implement.

[0165] Furthermore, for the two configuration methods mentioned above, the connecting pipe 1202 can be formed by setting the protruding structure to at least partially accommodate the groove structure, and the relative position between the second region 122 and the pressure relief mechanism 213 of the battery cell 20 can be realized. Moreover, this structural design has a certain offset during installation. These offsets can be used to absorb the tolerances between multiple battery cells 20 in the length, width or height directions, thereby improving the assembly efficiency of the battery device 10.

[0166] In some embodiments, a sealing structure 15 is provided between the first limiting part 215 and the second limiting part 14. The position of the sealing structure 15 can be set according to the actual application to suit different application scenarios and improve the flexibility of the setting of the sealing structure 15; in addition, the sealing structure 15 can also increase the sealing performance of the discharge pipe 12 and the sealing performance between the discharge pipe 12 and the pressure relief mechanism 213.

[0167] In some embodiments, a sealing structure 15 is provided between the protruding structure and the groove structure to improve the sealing performance of the discharge pipe 12 and the sealing performance between the discharge pipe 12 and the pressure relief mechanism 213, thereby reducing the impact of the overflowing high-temperature and high-pressure emissions on other battery cells 20 and other components in the battery device 10, reducing the risk of short circuits or even explosions in the battery device 10, and improving the reliability and stability of the battery device 10.

[0168] For example, such as Figures 18 to 19 As shown, the sealing structure 15 can be a sealing ring, which can be accommodated in the groove structure 141 of the second limiting part 14; or, if the first limiting part 215 is provided with a groove structure, the sealing ring can also be accommodated in the groove structure of the first limiting part 215.

[0169] It should be understood that the machining and fixing between the first limiting part 215 and the cover plate 212 in this application embodiment can be achieved in a variety of ways.

[0170] In some embodiments, such as Figures 18 to 19 As shown, the first limiting part 215 and the cover plate 212 on which it is located are integrally formed. For example, the first limiting part 215 can be a component of the cover plate 212 that protrudes toward the gas collecting pipe 1201, so as to simplify the structure of the cover plate 212 and improve the processing efficiency of the battery cell 20.

[0171] Alternatively, the first limiting part 215 and the cover plate 212 it is located on can be separately configured and connected, that is, the two can also be separate structures to increase structural flexibility. For example, the first limiting part 215 and the cover plate 212 can be connected by welding, that is, the first limiting part 215 can be fixed around the pressure relief mechanism 213 by welding, or the first limiting part 215 can also be glued to the cover plate 212 by adhesive, or the first limiting part 215 can also be connected to the cover plate 212 by snap-fit. The embodiments of this application are not limited to these.

[0172] It should be understood that the second limiting part 14 in the embodiments of this application can be implemented in a variety of ways.

[0173] In some embodiments, such as Figures 18 to 19 As shown, the second limiting part 14 and the gas collecting pipe 1201 are integrally formed. For example, the second limiting part 14 can be the part of the gas collecting pipe 1201 that protrudes toward the pressure relief mechanism 213, so as to simplify the structural complexity of the discharge pipe 12 and save the installation steps between the two.

[0174] Alternatively, the second limiting part 14 and the gas collecting pipe 1201 can also be separate structures. Figure 20 This diagram shows a partially exploded view of the gas collecting pipe 1201 and the second limiting part 14 according to an embodiment of this application. For example, the... Figure 20 The emission pipe 12 shown may be a part of the emission pipe 12 in the embodiments of this application, and may be different from the emission pipe 12. Figure 19 Another possible implementation. Figure 21 A cross-sectional schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 21 The cross-section is perpendicular to the width direction Y of the battery device 10, wherein the width direction Y of the battery device 10 in this embodiment is also the width direction of the gas collecting pipe 1201. Figure 22 A schematic diagram of the structure of the second limiting part 14 according to an embodiment of this application is shown. For example, Figure 22 It can be Figure 20 and Figure 21 A schematic diagram of the structure of the second limiting part 14 shown.

[0175] like Figures 20 to 22As shown, the first limiting portion 215 has a groove structure 2152. For example, the first limiting portion 215 has a groove structure 2152 that is recessed away from the second limiting portion 14 along its circumference. The second limiting portion 14 has a protrusion structure 142. For example, the second limiting portion 14 has a protrusion structure 142 that protrudes towards the first limiting portion 215 along its circumference. The protrusion structure 142 of the second limiting portion 14 is at least partially accommodated in the groove structure 2152 of the first limiting portion 215, thereby realizing mutual restriction and fixation between the first limiting portion 215 and the second limiting portion 14. The structure is simple and easy to implement. The groove structure 2152 of the first limiting portion 215 can be formed between the protrusion of the first limiting portion 215 and the cover plate 212 where it is located, but the embodiments of this application are not limited to this.

[0176] In this embodiment, the second limiting part 14 is separately provided and connected to the gas collecting pipe 1201 to improve structural flexibility and facilitate processing. For example, the second limiting part 14 and the gas collecting pipe 1201 are connected by welding, or the second limiting part 14 can be glued to the gas collecting pipe 1201 with adhesive, or the second limiting part 14 can be fixedly connected to the gas collecting pipe 1201 with bolts, screws or other connecting parts. This embodiment is not limited to these methods.

[0177] In some embodiments, when the second region 122 is a second through hole, at least a portion of the second limiting portion 14 is accommodated within the second through hole. This allows the second through hole and the pressure relief mechanism 213 to be positioned relative to each other when the first limiting portion 215 and the second limiting portion 14 cooperate. This enables the emissions discharged from the pressure relief mechanism 213 to pass through the cooperating first limiting portion 215 and second limiting portion 14 and enter the gas collecting pipe 1201 through the second through hole. The gas collecting pipe 1201 can then collect and discharge the emissions, reducing the impact of the high-temperature, high-pressure emissions on other components inside the casing 11 of the battery device 10. For example, when at least a portion of the second limiting portion 14 is accommodated within the second through hole, the portion of the second limiting portion 14 accommodated within the second through hole can be fixed to the second through hole using an adhesive for easy installation.

[0178] It should be understood that the specific structure of the second limiting part 14, which is separately provided from the gas collecting pipe 1201 in the embodiments of this application, can be set according to actual applications.

[0179] In some embodiments, the second limiting portion 14 includes a guide tube 144 and a limiting structure 143. One end of the guide tube 144 is accommodated in a second through hole, and the other end of the guide tube 144 extends toward the pressure relief mechanism 213. The limiting structure 143 surrounds the guide tube 144 and is used to cooperate with the first limiting portion 215. Thus, when the first limiting portion 215 and the second limiting portion 14 cooperate, that is, when the first limiting portion 215 and the limiting structure 143 cooperate, the emissions discharged from the pressure relief mechanism 213 can enter the gas collecting pipe 1201 through the guide tube 144, and then the gas collecting pipe 1201 can collect and discharge the emissions, thereby reducing the impact of the high-temperature and high-pressure emissions on other components inside the casing 11 of the battery device 10.

[0180] In this embodiment, the limiting structure 143 surrounds the guide tube 144, meaning the limiting structure 143 is located in at least a portion of the area surrounding the guide tube 144. For example, as Figures 20 to 22 As shown, the limiting structure 143 may occupy only a local area around the guide tube 144; for example, two limiting structures 143 may be arranged opposite each other around the guide tube 144. Alternatively, unlike... Figures 20 to 22 As shown, the limiting structure 143 can surround the flow guide tube 144.

[0181] In some embodiments, the first limiting part 215 is located between the guide pipe 144 and the limiting structure 143, that is, the first limiting part 215 is clamped between the limiting structure 143 and the guide pipe 144, so that the limiting structure 143 and the first limiting part 215 can cooperate with each other to improve structural stability and sealing, so that the emissions discharged from the self-depressurization mechanism 213 enter the gas collection pipe 1201 through the guide pipe 144, reducing the overflow emissions.

[0182] It should be understood that the mutual cooperation between the first limiting part 215 and the second limiting part 14 in the embodiments of this application can be achieved through the mutual cooperation of the limiting structure 143 of the first limiting part 215 and the second limiting part 14. For example, if the first limiting part 215 has a protrusion structure 2151 and the second limiting part 14 has a groove structure 141, then the groove structure 141 of the second limiting part 14 is disposed on the limiting structure 143; as another example, if the first limiting part 215 has a groove structure 2152 and the second limiting part 14 has a protrusion structure 142, then the protrusion structure 142 of the second limiting part 14 is disposed on the limiting structure 143.

[0183] In some embodiments, such as Figures 20 to 22As shown, a sealing structure 15 is provided between the end of the first limiting part 215 away from the cover plate 212 and the second limiting part 14. For example, the sealing structure 15 can be located between the guide pipe 144 and the limiting structure 143, and at the end of the first limiting part 215 away from the cover plate 212, to improve the sealing between the first limiting part 215 and the second limiting part 14, reduce the high-temperature and high-pressure emissions overflowing from between the first limiting part 215 and the second limiting part 14, thereby reducing the impact of the overflowing emissions on other components inside the casing 11 of the battery device 10, and improving the reliability and stability of the battery device 10.

[0184] It should be understood that the discharge pipe 12 in this embodiment can be used to discharge the emissions from the battery cell 20. Further, the discharge pipe 12 is also used to inject a fire-fighting medium into the battery cell 20 through a second region 122, so that in the event of thermal runaway of the battery cell 20, the fire-fighting medium can be injected into the battery cell 20 through the second region 122 of the discharge pipe 12. For example, the second region 122 can be a second through-hole, allowing the fire-fighting medium to enter the thermally runaway battery cell 20 through the second through-hole; or, for example, the second region 122 can be a weak area, whereby the emissions from the battery cell 20 damage the weak area, creating a rupture to allow the fire-fighting medium to enter the battery cell 20. This fire-fighting medium can reduce the temperature of the battery cell 20 experiencing thermal runaway, reducing the risk of fire and thermal diffusion, thereby reducing the risk of explosion and improving the reliability of the battery device 10.

[0185] In some embodiments, the fire-fighting medium in this application may also be a cooling medium, a coolant, or a cooling gas. For example, the fire-fighting medium may be water, a mixture of water and ethylene glycol, or air.

[0186] It should be understood that the discharge of emissions from battery cell 20 through discharge pipe 12, and the injection of fire-fighting medium into battery cell 20 through the same discharge pipe 12, can be achieved in various ways. For example, the discharge pipe 12 may have two ports arranged axially along the gas collection pipe 1201, one port for discharging emissions from battery cell 20, and the other port for injecting fire-fighting medium into battery cell 20.

[0187] For example, the discharge pipe 12 may be equipped with a detector for detecting the smoke concentration in the discharge pipe 12. When the detector detects that the smoke concentration in the discharge pipe 12 exceeds a preset value, fire-fighting medium is injected through one port of the gas collection pipe 1201 of the discharge pipe 12. In the event of thermal runaway of the battery cell 20, the emissions discharged through the pressure relief mechanism 213 enter the discharge pipe 12 and are discharged through one port of the gas collection pipe 1201 of the discharge pipe 12. Furthermore, the emissions will cause the smoke concentration in the discharge pipe 12 to increase. Therefore, the detector can detect that the smoke concentration in the discharge pipe 12 exceeds the preset value after the battery cell 20 experiences thermal runaway. Fire-fighting medium can then be injected into the discharge pipe 12 through the other port of the gas collection pipe 1201 of the discharge pipe 12 to reduce the temperature of the thermally runaway battery cell 20, reduce the risk of fire of the thermally runaway battery cell 20, and also reduce the risk of further thermal diffusion between the thermally runaway battery cell 20 and adjacent battery cells 20.

[0188] As an example, a fire extinguishing agent bottle can be installed in the energy storage device, and the discharge pipe 12 is connected to the fire extinguishing agent bottle. For example, the fire extinguishing agent bottle can be connected to the gas collection pipe 1201 of the discharge pipe 12 to inject fire extinguishing medium into the battery cell 20.

[0189] Figure 23 The diagram shows the structure of a battery cell 20 according to an embodiment of this application. For example, the battery cell 20 can be any one of the battery cells 20 in the battery device 10 according to an embodiment of this application. Figure 24 An exploded view of a partial structure of the battery cell 20 according to an embodiment of this application is shown, for example, Figure 24 It can be Figure 23 The diagram shows an exploded view of the casing 21 of the battery cell 20.

[0190] In this embodiment, the battery cell 20 is provided with a first limiting part 215, wherein the first limiting part 215 can be located on any wall of the battery cell 20. For example, along the direction of gravity, the first limiting part 215 can be located on the top wall or side wall of the battery cell 20. That is, in the actual application of the battery cell 20, the top wall facing upward or the side wall intersecting with the top wall can be a wall provided with a pressure relief mechanism 213 to facilitate the installation of the discharge pipe 12.

[0191] In some embodiments, such as Figure 23 and Figure 24As shown, the battery cell 20 includes a housing 21. Specifically, the housing 21 may include a shell 211, which is a hollow structure having at least one opening 2111. Further, the housing 21 also includes a cover plate 212 for covering the opening 2111 of the shell 211, so that the electrode assembly can be accommodated within the housing 21.

[0192] It should be understood that the housing 211 in this embodiment is a component for accommodating the electrode assembly. The housing 211 can be a hollow structure with an opening at one or more ends. For example, if the housing 211 is a hollow structure with an opening at one end, a cover plate 212 can be provided accordingly; if the housing 211 is a hollow structure with openings at opposite ends, two cover plates 212 can be provided, with the two cover plates 212 respectively covering the openings at both ends of the housing 211.

[0193] It should be understood that the cover plate 212 in this embodiment is used to cover the opening 2111 of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the cover plate 212 can be adapted to the shape of the housing 211. For example, as Figure 23 and Figure 24 As shown, the shell 211 has a cuboid structure, and the cover plate 212 has a rectangular plate structure that is adapted to the shell 211.

[0194] In some embodiments, the first limiting portion 215 may be located on any wall of the housing 21. For example, as Figure 23 and Figure 24 As shown, the first limiting part 215 can be located on the cover plate, that is, the cover plate 212 is provided with the first limiting part 215 and the pressure relief mechanism 213 to facilitate processing, but the embodiments of this application are not limited thereto.

[0195] In some embodiments, the outer casing 21 can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the outer casing 21 can be a sealed structure or a non-sealed structure. As an example, when the outer casing 21 is a non-sealed structure, the outer casing 21 serves to protect its internal electrode assembly, and a sealing bag is also included between the outer casing 21 and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing 21 is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0196] In some embodiments, the wall with the pressure relief mechanism 213 is further provided with two electrode terminals 214, and the pressure relief mechanism 213 is located between the two electrode terminals 214 to improve the integration of the battery cell 20 and facilitate processing. Specifically, the battery cell 20 of this application embodiment may include multiple electrode terminals 214, each electrode terminal 214 may be disposed on any wall, and the multiple electrode terminals 214 may be disposed on the same wall or different walls of the battery cell 20. For example, as Figure 23 and Figure 24 As shown, each battery cell 20 includes two electrode terminals 214, which are located on the same wall. For example, both electrode terminals 214 can be located on the cover plate 212.

[0197] In the event of thermal runaway in the battery cell 20, the pressure relief mechanism 213 is activated, and the battery cell 20 discharges emissions through the pressure relief mechanism 213. These emissions pass through a connecting pipe 1202 formed by the cooperating first limiting part 215 and the second limiting part 14 to reach the second region 122, and then enter the gas collecting pipe 1201 of the discharge pipe 12. The gas collecting pipe 1201 can then collect and discharge the emissions, thereby reducing the impact of the high-temperature, high-pressure emissions on the electrode terminals 214 on both sides of the pressure relief mechanism 213. For example, considering that the high-temperature, high-pressure emissions may include conductive particles, these particles may splash onto the electrode terminals 214 of the battery cell 20, causing a short circuit in the battery cell 20, which could lead to further fire or explosion. Therefore, collecting and discharging these emissions through the discharge pipe 12 can reduce further impact on the battery device 10, lower the risk of explosion, and improve the reliability and stability of the battery device 10.

[0198] It should be understood that the electrode terminals 214 in this embodiment are used for electrical connection with the electrode assembly inside the battery cell 20 to output the electrical energy of the battery cell 20. Furthermore, the battery cell 20 may include at least two electrode terminals 214, each including at least one positive electrode terminal 2141 and at least one negative electrode terminal 2142. The positive electrode terminal 2141 is used for electrical connection with the positive electrode tab of the electrode assembly, and the negative electrode terminal 2142 is used for electrical connection with the negative electrode tab of the electrode assembly. The positive electrode terminal 2141 and the positive electrode tab can be directly connected or indirectly connected, and the negative electrode terminal 2142 and the negative electrode tab can be directly connected or indirectly connected. For example, the positive electrode terminal 2141 can be electrically connected to the positive electrode tab through a current collector, and the negative electrode terminal 2142 can be electrically connected to the negative electrode tab through a current collector.

[0199] In some embodiments, the cover plate 212 may also be provided with other components. For example, the cover plate 212 may also be provided with an injection hole to inject electrolyte into the interior of the battery cell 20 through the injection hole, but the embodiments of this application are not limited thereto.

[0200] According to some embodiments of this application, this application also provides an electrical device including the battery device 10 described in any of the above embodiments, and the battery device 10 is used to provide electrical energy to the electrical device.

[0201] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery device 10, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. The electrical device can be any of the aforementioned devices or systems that use battery devices.

[0202] Figure 25 A schematic diagram of the structure of the storage unit 30 of the energy storage device 1 according to an embodiment of this application is shown; Figure 26 This diagram illustrates the structure of multiple battery devices 10 housed within a housing 30 according to an embodiment of this application. According to some embodiments of this application, an energy storage device 1 is provided, including one or more battery clusters 100 to increase the voltage and capacity of the energy storage device 1. Each battery cluster 100 may include multiple battery devices 10, which are connected in series via a busbar to increase the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters 100, the multiple battery clusters 100 are connected in parallel to increase the capacity of the energy storage device 1.

[0203] The energy storage device 1 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 1 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 1 can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the use of the energy storage device 1.

[0204] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0205] In some embodiments, the energy storage device 1 may include a housing 30 for accommodating a plurality of battery devices 10. Exemplarily, the housing 30 of the energy storage device 1 in this application embodiment may include at least one battery compartment 31, each battery compartment 31 may be used to accommodate at least one battery cluster 100, and each battery cluster 100 may include a plurality of battery devices 10. For example, as... Figure 25 and Figure 26 As shown, the housing 30 includes multiple battery compartments 31, each corresponding to a single battery cluster 100; or, unlike... Figure 25 and Figure 26 As shown, the housing 30 may include at least one battery compartment 31, each battery compartment 31 being used to accommodate multiple battery clusters, but the embodiments of this application are not limited thereto.

[0206] In some embodiments, the discharge pipe 12 included in the battery device 10 can be connected to the outside of the housing 30 so that the discharge in the discharge pipe 12 can be discharged to the outside of the housing 30, reducing the leakage of the discharge into the housing 30 and thus affecting other battery devices 10 and other components inside the housing 30, thereby improving the reliability of the energy storage device 1.

[0207] like Figure 25 and Figure 26 As shown, the energy storage device 1 also includes a manifold 40 for connecting the discharge pipe 12 to the outside of the housing 30. Exemplarily, in conjunction with... Figure 1 Each of the multiple battery devices 10 has a discharge pipe 12 that can be connected to the outside of the battery device 10 through a discharge port 113 of the housing 11. Furthermore, a manifold 40 can be connected to the discharge pipe 12 passing through the discharge port 113 to connect the discharge pipes 12 of the multiple battery devices 10 to the manifold 40. At least one end of the manifold 40 can pass through the housing 30, thereby allowing the discharge pipes 12 to be connected to the outside of the housing 30 through the manifold 40.

[0208] In some embodiments, the energy storage device 1 may further include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module. Exemplarily, at least some of the above modules may be housed within the storage enclosure 30.

[0209] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 10 via piping for regulating the temperature of the individual battery cells.

[0210] As an example, the main control module can serve as the battery management unit of the battery cluster 100, used to monitor and manage the battery cluster 100. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster 100. For example, it can control the charging and discharging current and voltage of the battery cluster 100. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0211] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage it. The central control module can monitor information such as current, voltage, power, state of charge, and temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0212] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0213] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1.

[0214] According to some embodiments of this application, this application also provides an energy storage system, including the energy storage device 1 described in any of the above embodiments. Figure 27 A structural block diagram of an energy storage system according to an embodiment of this application is shown. In some embodiments, such as... Figure 27 As shown, the energy storage system may include one or more energy storage devices 1 and a power converter system (PCS) 2, wherein the power converter 2 is used to connect between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0215] According to some embodiments of this application, this application provides a charging network. Figure 28 A structural block diagram of a charging network according to an embodiment of this application is shown. Figure 28 As shown, the charging network includes a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, which provides power to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, allowing the battery device to supply its stored energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical devices (such as vehicles) to replenish their power.

[0216] The energy storage device 1 can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0217] According to some embodiments of this application, see Figures 2 to 17 This application provides a battery device 10, including: a plurality of battery cells 20, each battery cell 20 having a pressure relief mechanism 213 provided on the wall 201 of its outer casing 21; a discharge pipe 12, the discharge pipe 12 including a gas collecting pipe 1201, the gas collecting pipe 1201 including a first region 121 and a plurality of second regions 122, the first region 121 and the second regions 122 being arranged opposite to each other along the thickness direction of the wall 201, the second regions 122 being second through holes or weak areas, the plurality of second regions 122 corresponding one-to-one with the pressure relief mechanisms 213 of the plurality of battery cells 20, so that the emissions discharged by the plurality of pressure relief mechanisms 213 enter the gas collecting pipe 1201 through the second regions 122; and a heat insulation member 13 covering the first region 121.

[0218] The heat insulation element 13 is located inside the gas collecting pipe 1201. The first region 121 corresponds to a plurality of second regions 122; alternatively, the gas collecting pipe 1201 includes a plurality of first regions 121, each corresponding to a plurality of second regions 122, and the battery device includes a plurality of heat insulation elements 13, each corresponding to a plurality of first regions 121. The gas collecting pipe 1201 includes a first wall 123, which includes the first region 121. The first wall 123 has a groove 1231 with an opening facing the second region 122, and the heat insulation element 13 is accommodated within the groove 1231.

[0219] The gas collecting pipe 1201 includes intersecting first walls 123 and second walls 124. The first wall 123 includes a first region 121. The heat insulation member 13 includes intersecting main body portion 131 and extension portion 132. The main body portion 131 covers the first region 121 of the first wall 123, and the extension portion 132 covers at least a portion of the second wall 124. The gas collecting pipe 1201 includes two opposing second walls 124, and the heat insulation member 13 includes two opposing extension portions 132.

[0220] The shape of the heat insulation component 13 is the same as that of the gas collecting pipe 1201. The heat insulation component 13 is provided with a clearance hole 133, which is used to avoid the second area 122. The heat insulation component 13 is provided with multiple clearance holes 133, and the multiple clearance holes 133 correspond one-to-one with multiple second areas 122.

[0221] The gas collecting pipe 1201 includes a first wall 123, which includes a first region 121, and the first region 121 is a first through hole 1232. At least a portion of the heat insulation member 13 is accommodated in the first through hole 1232. The first through hole 1232 corresponds to a plurality of second regions 122, and the first through hole 1232 penetrates the first wall 123 along the arrangement direction of the plurality of second regions 122. The first wall 123 includes a plurality of first through holes 1232, and the plurality of first through holes 1232 correspond one-to-one with the plurality of second regions 122. The battery device includes a plurality of heat insulation members 13, and the plurality of heat insulation members 13 correspond one-to-one with the plurality of first through holes 1232.

[0222] The material of the gas collecting pipe 1201 is different from that of the heat insulation component 13. The gas collecting pipe 1201 is made of plastic, while the heat insulation component 13 is made of sheet metal. The materials of the gas collecting pipe 1201 and / or the heat insulation component 13 satisfy at least one of the following conditions: the melting point is in the range of [350℃, 650℃]; the volume resistivity is in the range of [10...]. 15 Ω·cm, 10 16 [Ω·cm]; dielectric strength ranges from [25kV / mm, 55kV / mm]; and flame retardancy rating is UL94 V0.

[0223] The discharge pipeline 12 also includes multiple connecting pipes 1202, each connecting pipe 1202 being disposed between the corresponding pressure relief mechanism 213 and the second area 122, so that the emissions discharged by the pressure relief mechanism 213 enter the gas collection pipe 1201 through the connecting pipe 1202 and the second area 122.

[0224] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not 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 modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. 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, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Multiple battery cells (20), each of which has a pressure relief mechanism (213) provided on the wall (201) of its outer casing (21); The discharge pipe (12) includes a gas collection pipe (1201), which includes a first region (121) and a plurality of second regions (122). The first region (121) and the second region (122) are arranged opposite to each other along the thickness direction of the wall (201). The second region (122) is a second through hole or a weak area. The plurality of second regions (122) correspond one-to-one with the pressure relief mechanism (213) of the plurality of battery cells (20), so that the emissions discharged by the plurality of pressure relief mechanisms (213) enter the gas collection pipe (1201) through the second region (122). A heat insulation element (13) covers the first region (121).

2. The battery device according to claim 1, characterized in that, The heat insulation element (13) is located inside the gas collecting pipe (1201).

3. The battery device according to claim 2, characterized in that, The first region (121) corresponds to multiple second regions (122); or, The gas collecting pipe (1201) includes a plurality of first regions (121), and the plurality of first regions (121) correspond one-to-one with a plurality of second regions (122). The battery device includes a plurality of heat insulation components (13), and the plurality of heat insulation components (13) correspond one-to-one with a plurality of first regions (121).

4. The battery device according to claim 3, characterized in that, The gas collection pipe (1201) includes a first wall (123), the first wall (123) includes a first region (121), the first wall (123) is provided with a groove (1231) with an opening facing the second region (122), and the heat insulation member (13) is accommodated in the groove (1231).

5. The battery device according to claim 2, characterized in that, The gas collection pipe (1201) includes an intersecting first wall (123) and a second wall (124), the first wall (123) including the first region (121), and the heat insulation member (13) including an intersecting main body (131) and an extension (132), the main body (131) being used to cover the first region (121) of the first wall (123), and the extension (132) being used to cover at least a portion of the second wall (124).

6. The battery device according to claim 5, characterized in that, The gas collecting pipe (1201) includes two second walls (124) arranged opposite to each other, and the heat insulation member (13) includes two extensions (132) arranged opposite to each other.

7. The battery device according to claim 2, characterized in that, The shape of the heat insulation component (13) is the same as that of the gas collecting pipe (1201). The heat insulation component (13) is provided with a clearance hole (133), which is used to avoid the second area (122).

8. The battery device according to claim 7, characterized in that, The heat insulation component (13) is provided with a plurality of clearance holes (133), and the plurality of clearance holes (133) correspond one-to-one with a plurality of second regions (122).

9. The battery device according to claim 1, characterized in that, The gas collecting pipe (1201) includes a first wall (123), the first wall (123) includes a first region (121), and the first region (121) is a first through hole (1232).

10. The battery device according to claim 9, characterized in that, At least a portion of the heat insulation element (13) is accommodated in the first through hole (1232).

11. The battery device according to claim 9, characterized in that, The first through hole (1232) corresponds to a plurality of second regions (122), and the first through hole (1232) penetrates the first wall (123) along the arrangement direction of the plurality of second regions (122).

12. The battery device according to claim 9, characterized in that, The first wall (123) includes a plurality of first through holes (1232), and the plurality of first through holes (1232) correspond one-to-one with a plurality of second regions (122). The battery device includes a plurality of heat insulation components (13), and the plurality of heat insulation components (13) correspond one-to-one with a plurality of first through holes (1232).

13. The battery device according to claim 12, characterized in that, Along the arrangement direction of the plurality of second regions (122): the maximum length of the edge region of the heat insulation member (13) is greater than the maximum length of the middle region of the heat insulation member (13), the maximum length of the edge region of the first through hole (1232) is greater than the maximum length of the middle region of the first through hole (1232), and the maximum length of the surface of the first through hole (1232) facing the inside of the gas collecting pipe (1201) is greater than the maximum length of the surface of the first through hole (1232) facing the outside of the gas collecting pipe (1201).

14. The battery device according to any one of claims 1 to 13, characterized in that, The material of the gas collecting pipe (1201) is different from the material of the heat insulation component (13).

15. The battery device according to any one of claims 1 to 13, characterized in that, The gas collecting pipe (1201) is made of plastic, and the heat insulation component (13) is made of sheet metal.

16. The battery device according to any one of claims 1 to 13, characterized in that, The material of the gas collecting pipe (1201) and / or the material of the heat insulation component (13) meets at least one of the following conditions: The melting point ranges from [350℃ to 650℃]. The range of volume resistivity is [10]. 15 Ω·cm, 10 16 Ω·cm]; The dielectric strength ranges from [25kV / mm, 55kV / mm]; and The flame retardant rating is UL94 V0.

17. The battery device according to any one of claims 1 to 13, characterized in that, The discharge pipeline (12) also includes a plurality of connecting pipes (1202), each of the connecting pipes (1202) being disposed between the corresponding pressure relief mechanism (213) and the second region (122) so that the emissions discharged by the pressure relief mechanism (213) pass through the connecting pipe (1202) and the second region (122) into the gas collection pipe (1201).

18. The battery device according to claim 17, characterized in that, Each of the connecting tubes (1202) includes a first limiting part (215) and a second limiting part (14). The first limiting part (215) surrounds the pressure relief mechanism (213) and is disposed on the outer surface of the battery cell (20); The second limiting part (14) is disposed around the second region (122), the second region (122) is the second through hole, and the first limiting part (215) and the second limiting part (14) cooperate with each other to form the connecting pipe (1202).

19. An energy storage device, characterized in that, include: Multiple battery devices according to any one of claims 1 to 18, the battery devices being used to store or provide electrical energy.

20. An energy storage system, characterized in that, include: Power conversion device (2); According to claim 19, the power conversion device (2) is used to electrically connect the power generation device (3) and the energy storage device.

21. A charging network, characterized in that, include: Charging piles (4); The energy storage device according to claim 19 or the energy storage system according to claim 20 is used to provide electrical energy to the charging pile (4).

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