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

Abstract

The application discloses a battery monomer, a battery device, an energy storage device, an energy storage system and a charging network. The battery device comprises: a plurality of battery monomers, a first wall of each battery monomer is provided with a pressure relief mechanism and a first limiting part, the first limiting part surrounds the pressure relief mechanism and is arranged on the outer surface of the first wall; a discharge pipeline, the discharge pipeline comprises a plurality of through holes, the plurality of through holes correspond one-to-one to the pressure relief mechanisms of the plurality of battery monomers; a plurality of second limiting parts, each second limiting part surrounds a corresponding through hole, and the first limiting part and the second limiting part cooperate with each other, so that the discharge of the pressure relief mechanism passes through the through hole into the discharge pipeline and is discharged through the discharge pipeline. The battery monomer, the battery device, the energy storage device, the energy storage system and the charging network can improve the reliability and stability of the battery device.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery cell, 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 the performance of battery devices, safety is also a crucial issue. In the event of thermal runaway within a single battery cell, reducing the risk of thermal diffusion between cells is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] This application provides a battery cell, 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 and a first limiting portion disposed on a first wall, the first limiting portion surrounding the pressure relief mechanism and disposed on the outer surface of the first wall; a discharge pipe including a plurality of through holes, the plurality of through holes corresponding one-to-one with the pressure relief mechanisms of the plurality of battery cells; and a plurality of second limiting portions, each of the second limiting portions being disposed around a corresponding through hole, the first limiting portion and the second limiting portion cooperating with each other to allow emissions discharged from the pressure relief mechanism to enter the discharge pipe through the through hole and be discharged through the discharge pipe.

[0005] Therefore, in the battery device of this application embodiment, when a battery cell experiences thermal runaway, the pressure relief mechanism is activated, and the battery cell discharges emissions through the pressure relief mechanism. These emissions pass through a first and second limiting part that cooperate with each other and enter the discharge pipe through a through-hole. The emissions can then be collected and discharged through the discharge pipe, reducing the impact of the high-temperature, high-pressure emissions on other components inside the battery device housing. For example, considering that the high-temperature, high-pressure emissions may include conductive particles, these particles may cause short circuits between multiple components inside the housing, leading to further fire or explosion. Collecting and discharging these emissions through 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. Furthermore, by providing the same discharge pipe for multiple battery cells, when any of these battery cells experiences thermal runaway, the emissions from that battery cell can be collected through the discharge pipe, simplifying the structure and reducing the structural complexity of the battery device.

[0006] In some embodiments, the second limiting part is separately provided and connected to the discharge pipeline to improve structural flexibility and facilitate processing.

[0007] In some embodiments, at least a portion of the second limiting portion is accommodated within the through hole, so that when the first limiting portion and the second limiting portion cooperate with each other, the through hole and the pressure relief mechanism are relatively arranged, so that the discharge from the pressure relief mechanism passes through the cooperating first and second limiting portions and enters the discharge pipeline through the through hole, and can then be collected and discharged by the discharge pipeline, thereby reducing the impact of the high temperature and high pressure discharge on other components inside the battery device housing.

[0008] In some embodiments, the second limiting portion includes a guide tube and a limiting structure. One end of the guide tube is received within the through hole, and the other end extends toward the pressure relief mechanism. The limiting structure surrounds the guide tube and is used to cooperate with the first limiting portion. Thus, when the limiting structures of the first and second limiting portions cooperate, the emissions discharged from the pressure relief mechanism can enter the discharge pipeline through the guide tube, and can then be collected and discharged by the discharge pipeline, thereby reducing the impact of the high-temperature, high-pressure emissions on other components inside the battery pack.

[0009] In some embodiments, the first limiting portion is located between the guide pipe and the limiting structure to improve structural stability and sealing, so that the discharge from the self-relief mechanism enters the discharge pipeline through the guide pipe, reducing the amount of overflowing discharge.

[0010] In some embodiments, a sealing structure is provided between the end of the first limiting portion away from the first wall and the second limiting portion to improve the sealing between the first limiting portion and the second limiting portion, reduce the high-temperature and high-pressure emissions that overflow from between the first limiting portion and the second limiting portion, thereby reducing the impact of the overflowing emissions on other components inside the battery device housing and improving the reliability and stability of the battery device.

[0011] In some embodiments, the second limiting part and the discharge pipeline are integrally formed to simplify the structural complexity of the discharge pipeline and save installation steps between them.

[0012] In some embodiments, the first limiting portion and the first wall are integrally formed to simplify the structure of the first wall and improve the processing efficiency of the battery cell.

[0013] In some embodiments, the first limiting part is separately disposed and connected to the first wall to improve structural flexibility and facilitate processing.

[0014] In some embodiments, the first limiting part and the first wall are connected by welding, which provides a stable structure and is easy to implement.

[0015] In some embodiments, the second limiting portion is sleeved on the outer side of the first limiting portion away from the pressure relief mechanism. Considering that when a battery cell experiences thermal runaway, the emissions discharged from the lower battery cell are discharged upwards through the pressure relief mechanism and enter the discharge pipeline through the through hole, compared to the scheme where the first limiting portion is sleeved on the second limiting portion, the case where the second limiting portion is sleeved on the outer side of the first limiting portion can reduce the emissions overflowing through the gap between the first and second limiting portions. This reduces the impact of these emissions on other battery cells and other components within the battery device, lowers the risk of short circuits or even explosions within the battery device, and improves the reliability and stability of the battery device.

[0016] In some embodiments, the first limiting portion has a protruding structure and the second limiting portion has a groove structure. Alternatively, the first limiting portion has a groove structure and the second limiting portion has a protruding structure. The protruding structure is at least partially accommodated within the groove structure, thereby achieving mutual restraint between the first and second limiting portions and thus fixing the device. This structure is simple and easy to implement.

[0017] In some embodiments, a sealing structure is provided between the protruding structure and the groove structure to improve the sealing between the discharge pipeline and the pressure relief mechanism, reduce the impact of overflowing high-temperature and high-pressure emissions on other battery cells and other components in the battery device, reduce the risk of short circuits or even explosions in the battery device, and improve the reliability and stability of the battery device.

[0018] In some embodiments, a sealing structure is provided between the first limiting portion and the second limiting portion. The sealing structure can be located at any position between the first limiting portion and the second limiting portion to improve the flexibility of the sealing structure's position setting and increase the sealing performance between the discharge pipeline and the pressure relief mechanism, thereby reducing the impact of overflowing high-temperature and high-pressure emissions on other battery cells and other components in the battery device.

[0019] In some embodiments, the discharge pipe is also used to inject fire-fighting medium into the battery cell through the through hole, so that in the event of thermal runaway of the battery cell, the fire-fighting medium can be injected into the battery cell through the through hole of the discharge pipe. The fire-fighting medium can reduce the temperature of the battery cell that has experienced thermal runaway, reduce the risk of fire and thermal spread, thereby reducing the risk of explosion and improving the reliability of the battery device.

[0020] In some embodiments, the battery device further includes: a housing for accommodating the plurality of battery cells and the discharge pipeline, the housing being provided with a discharge port for discharging the emissions from the discharge pipeline to the outside of the battery device, thereby reducing the impact of high-temperature and high-pressure emissions on other components inside the housing of the battery device, reducing the risk of short circuits or even explosions, and improving the reliability and stability of the battery device; and, by reasonably setting the position of the discharge port, high-temperature and high-pressure emissions can be discharged in a directional manner to suit different application scenarios.

[0021] In some embodiments, the first wall is provided with two electrode terminals, and the pressure relief mechanism is located between the two electrode terminals to improve the integration of the battery cell and facilitate processing. Furthermore, in the event of thermal runaway in the battery cell, considering that the high-temperature, high-pressure emissions may include conductive particles, these particles may splash onto the electrode terminals of the battery cell, causing a short circuit and potentially leading to further fire or explosion. Therefore, collecting and discharging these emissions through an exhaust pipeline can reduce further impact on the battery device, lower the risk of explosion, and improve the reliability and stability of the battery device.

[0022] In some embodiments, the first wall is the top or side wall of the battery cell along the direction of gravity to facilitate the installation of the discharge pipe.

[0023] Secondly, a battery cell is provided, comprising: a housing; a pressure relief mechanism disposed on a first wall of the housing; and a first limiting portion surrounding the pressure relief mechanism and disposed on the outer surface of the first wall, the first limiting portion cooperating with a second limiting portion of the battery device, the second limiting portion being disposed around a through hole of a discharge pipe in the battery device, such that emissions discharged from the pressure relief mechanism enter the discharge pipe through the through hole and are discharged through the discharge pipe.

[0024] In the event of thermal runaway in a single battery cell, the pressure relief mechanism is activated, allowing the cell to discharge emissions. These emissions pass through a first and second limiting part that cooperate with each other, and then through a through-hole into a discharge pipe. The discharge pipe collects and discharges the emissions, reducing the impact of the high-temperature, high-pressure emissions on other components inside the battery pack housing the battery cell. For example, considering that the high-temperature, high-pressure emissions may contain conductive particles that could cause short circuits between multiple components inside the pack, potentially leading to further fire or explosion, collecting and discharging these emissions through the discharge pipe reduces further impact on the battery pack, lowers the risk of explosion, and improves the reliability and stability of the battery pack.

[0025] Thirdly, an energy storage device is provided, comprising: a battery device as described in the first aspect or any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0026] In some embodiments, the energy storage device further includes: a housing for accommodating multiple battery devices; and a manifold for connecting the discharge pipeline to the outside of the housing, so that the discharge pipeline can be discharged to the outside of the housing, reducing the leakage of the discharge into the housing and thus affecting other battery devices and other components in the housing, thereby improving the reliability of the energy storage device.

[0027] Fourthly, an energy storage system is provided, comprising: a power conversion device; and the battery device described in the third aspect, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0028] Fifthly, a charging network is provided, comprising: a charging pile; an energy storage device as described in the third aspect or an energy storage system as described in the fourth aspect, wherein the energy storage device or the energy storage system is used to provide electrical energy to the charging pile. Attached Figure Description

[0029] Figure 1 This is an exploded view of a battery device according to an embodiment of this application;

[0030] Figure 2 This is a partial structural diagram of a battery device according to an embodiment of this application;

[0031] Figure 3 This is an exploded view of a partial structure of a battery device according to an embodiment of this application;

[0032] Figure 4 This is a side view of a partial structure of a battery device according to an embodiment of this application;

[0033] Figure 5 This is a cross-sectional schematic diagram of a partial structure of a battery device according to an embodiment of this application;

[0034] Figure 6 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;

[0035] Figure 7 This is a cross-sectional schematic diagram of a partial structure of a battery device according to another embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure of the second limiting part according to an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the structure of a battery cell according to an embodiment of this application;

[0038] Figure 10 This is an exploded view of the casing of a battery cell according to one embodiment of this application;

[0039] Figure 11 This is a schematic diagram of the structure of the storage chamber of an energy storage device according to an embodiment of this application;

[0040] Figure 12 This is a schematic diagram of the structure of multiple battery devices housed in a compartment according to an embodiment of this application;

[0041] Figure 13 This is a structural block diagram of an energy storage system according to an embodiment of this application;

[0042] Figure 14 This is a structural block diagram of a charging network according to an embodiment of this application.

[0043] The accompanying drawings are not drawn to scale. Detailed Implementation

[0044] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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).

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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 without causing further safety issues for the battery system remains a pressing problem that needs to be solved.

[0057] This application provides a battery cell, a battery device, an energy storage device, an energy storage system, and a charging network, which can solve the above-mentioned problems. The battery device of this application includes multiple battery cells, a discharge pipeline, and multiple second limiting parts. Each battery cell has a pressure relief mechanism and a first limiting part on its first wall, with the first limiting part surrounding the pressure relief mechanism and disposed on the outer surface of the first wall. The discharge pipeline includes multiple through holes, each corresponding to a pressure relief mechanism of one of the multiple battery cells. Each of the multiple second limiting parts surrounds a corresponding through hole. The first and second limiting parts cooperate with each other. Thus, in the event of thermal runaway in a battery cell, the pressure relief mechanism is activated, and the battery cell discharges emissions through the pressure relief mechanism. The emissions pass through the cooperating first and second limiting parts and enter the discharge pipeline through the through holes, where they can be collected and discharged, reducing the impact of the high-temperature, high-pressure emissions on other components inside the battery device's casing. For example, considering that high-temperature, high-pressure emissions may include conductive particles, which could cause short circuits between multiple components within the enclosure, potentially leading to further fire or explosion, collecting and discharging these emissions through an exhaust pipe can reduce further impact on the battery device, lower the risk of explosion, and improve the reliability and stability of the battery device. Furthermore, by using the same exhaust pipe for multiple battery cells, emissions from any of these cells can be collected through this pipe in the event of thermal runaway, simplifying the structure and reducing the structural complexity of the battery device.

[0058] In addition, the relative position between the through hole of the discharge pipe and the pressure relief mechanism of the battery cell in the embodiments of this application can be achieved by the cooperation of the first limiting part and the second limiting part. This design of at least two components cooperating with each other has a certain offset during installation. These offsets can be used to absorb the tolerances between multiple battery cells in the length, width or height direction, and improve the assembly efficiency of the battery device.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] like Figure 1As 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.

[0063] Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is 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 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 4 It can be Figure 3 A side view of a partial structure of the battery device 10 shown; Figure 5 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 5 It can be along Figure 4 A partially enlarged view of the cross-sectional view along the A-A' direction shown. (See attached image.) Figures 2 to 5 As shown, the battery device 10 of this application embodiment includes a plurality of battery cells 20, an exhaust pipe 12 and a plurality of second limiting parts 14. For example, the plurality of battery cells 20, the exhaust pipe 12 and the plurality of second limiting parts 14 can all be accommodated in the housing 11.

[0064] In this embodiment, each battery cell 20 has a first wall 201 provided with a pressure relief mechanism 213 and a first limiting part 215. The first limiting part 215 surrounds the pressure relief mechanism 213 and is disposed on the outer surface of the first wall 201. The discharge pipe 12 includes a plurality of through holes 121, which correspond one-to-one with the pressure relief mechanisms 213 of the plurality of battery cells 20. Each second limiting part 14 is disposed around the corresponding through hole 121. The first limiting part 215 and the second limiting part 14 cooperate with each other so that the discharge from the pressure relief mechanism 213 enters the discharge pipe 12 through the through hole 121 and is discharged through the discharge pipe 12.

[0065] 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.

[0066] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] In this embodiment, the first wall 201 of the battery cell 20 is provided with a pressure relief mechanism 213. The pressure relief mechanism 213 is used to discharge internal gas from the battery cell 20. The first wall 201 can be any wall of the battery cell 20. As an example, when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 213 is actuated 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 release of internal pressure or temperature. This 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.

[0071] As an example, the pressure relief mechanism 213 can be integrally formed with the first wall 201. As an example, the pressure relief mechanism 213 can also be separately configured and connected to the first wall 201.

[0072] 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.

[0073] 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.

[0074] In this embodiment of the application, the first wall 201 of the battery cell 20 is further provided with a first limiting portion 215, which surrounds the pressure relief mechanism 213, that is, the first limiting portion 215 is located in at least a portion of the area surrounding the pressure relief mechanism 213. For example, as Figures 2 to 5 As shown, the first limiting part 215 can surround the pressure relief mechanism 213; or, unlike... Figures 2 to 5 As shown, the first limiting part 215 can occupy only a local area around the pressure relief mechanism 213 to simplify the structure.

[0075] like Figures 2 to 5 As shown, the first limiting part 215 is disposed on the outer surface of the first wall 201, wherein the outer surface of the first wall 201 is the side surface of the first wall 201 away from the interior of the battery cell 20, and the first limiting part 215 protrudes from the outer surface of the first wall 201 and extends in a direction away from the outer surface.

[0076] In this embodiment of the application, the discharge pipe 12 is disposed on the side of the first wall 201 of the battery cell 20 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 2 to 5 As shown, the discharge pipe 12 includes a plurality of through holes 121, each of which corresponds to a pressure relief mechanism of a plurality of battery cells 20. The through holes 121 may be located on the side of the discharge pipe 12 facing the first wall 201, so that the through holes 121 face the pressure relief mechanism 213.

[0077] In the embodiments of this application, each of the plurality of second limiting portions 14 is disposed around the corresponding through hole 121, that is, the second limiting portion 14 is connected to the discharge pipe 12, and the second limiting portion 14 is located in at least a portion of the area surrounding the through hole 121. For example, the second limiting portion 14 may surround the through hole 121; or, the second limiting portion 14 may occupy only a partial area around the through hole 121 to simplify the structure.

[0078] In this embodiment, the second limiting part 14 can protrude towards the first wall 201 relative to the discharge pipe 12, while the first limiting part 215 protrudes towards the discharge pipe 12. The first limiting part 215 and the second limiting part 14 can cooperate to fix the discharge pipe 12 connected to the second limiting part 14 and the battery cell 20 provided with the first limiting part 215, and the through hole 121 is provided corresponding to the pressure relief mechanism 213. Thus, in the event of thermal runaway of 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 discharge pipe 12 through the through hole 121, where they can be collected and discharged by the discharge pipe 12, thereby reducing the impact of the high-temperature, high-pressure emissions on other components inside the casing 11 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 inside the housing 11, leading to further fires or explosions, 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.

[0079] In addition, the relative position between the through hole 121 of the discharge pipe 12 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 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.

[0080] In this embodiment, the battery device 10 includes a plurality of battery cells 20, and the discharge pipe 12 includes a plurality of through holes 121, and is connected by a plurality of second limiting parts 14, such that the plurality of through holes 121 correspond to the pressure relief mechanisms 213 of the plurality of battery cells 20. Figures 2 to 5As 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 discharge pipe 12 may include a plurality of through holes 121 arranged along the length direction X of the battery device 10. The plurality of through holes 121 correspond to a plurality of second limiting parts 14. The plurality of through holes 121 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 discharge pipe 12 can be provided 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 discharge pipe 12, simplifying the structure and reducing the structural complexity of the battery device 10.

[0081] 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 discharge pipes 12, which correspond one-to-one with the plurality of battery cell assemblies, for collecting emissions from the battery cells 20 included in the corresponding battery cell assembly.

[0082] 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.

[0083] 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 discharge pipes 12 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 discharge pipes 12, thereby improving the design flexibility of the battery device 10.

[0084] 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.

[0085] 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.

[0086] 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 2 to 5 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 through hole 121, 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 discharge pipe 12 through the through hole 121, compared to the scheme of sleeved first limiting part 215 on 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.

[0087] 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.

[0088] 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 2 to 5 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.

[0089] Or, with Figures 2 to 5 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.

[0090] Furthermore, for the two configuration methods mentioned above, the relative position between the through hole 121 of the discharge pipe 12 and the pressure relief mechanism 213 of the battery cell 20 can be achieved by setting a protruding structure that is at least partially accommodated in the groove structure. Moreover, this structural design has a certain offset during installation, which 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.

[0091] In some embodiments, a sealing structure 13 is provided between the first limiting part 215 and the second limiting part 14. The position of the sealing structure 13 can be set according to the actual application to suit different application scenarios and improve the flexibility of the setting of the sealing structure 13; in addition, the sealing structure 13 can also increase the sealing performance between the discharge pipe 12 and the pressure relief mechanism 213.

[0092] In some embodiments, a sealing structure 13 is provided between the protruding structure and the groove structure to improve the sealing between the discharge pipe 12 and the pressure relief mechanism 213, reduce the impact of overflowing high-temperature and high-pressure emissions on other battery cells 20 and other components in the battery device 10, reduce the risk of short circuits or even explosions in the battery device 10, and improve the reliability and stability of the battery device 10.

[0093] For example, such as Figures 2 to 5 As shown, the sealing structure 13 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.

[0094] It should be understood that the first limiting part 215 provided on the first wall 201 in the embodiments of this application can be implemented in a variety of ways.

[0095] In some embodiments, such as Figures 2 to 5 As shown, the first limiting part 215 and the first wall 201 are integrally formed. For example, the first limiting part 215 can be a component of the first wall 201 that protrudes toward the discharge pipe 12, so as to simplify the structure of the first wall 201 and improve the processing efficiency of the battery cell 20.

[0096] Alternatively, the first limiting part 215 and the first wall 201 can be separately configured and connected, that is, they can also be separate structures to increase structural flexibility. For example, the first limiting part 215 and the first wall 201 can be connected by welding, that is, the first limiting part 215 can be fixed around the pressure relief mechanism 213 of the first wall 201 by welding, or the first limiting part 215 can be pasted to the first wall 201 by adhesive, or the first limiting part 215 can be connected to the first wall 201 by snap-fit. The embodiments of this application are not limited to these.

[0097] It should be understood that the second limiting part 14 in the embodiments of this application can be implemented in a variety of ways.

[0098] In some embodiments, such as Figures 2 to 5 As shown, the second limiting part 14 and the discharge pipe 12 are integrally formed. For example, the second limiting part 14 can be the part of the discharge pipe 12 that protrudes toward the first wall 201, so as to simplify the structural complexity of the discharge pipe 12 and save the installation steps between the two.

[0099] Alternatively, the second limiting part 14 and the discharge pipe 12 can also be a separate structure. Figure 6 This paper shows a partially exploded structural diagram of the discharge pipe 12 and the second limiting part 14 according to an embodiment of this application. For example, the... Figure 6 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 5 Another possible implementation. Figure 7 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 7 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 discharge pipe 12. Figure 8 A schematic diagram of the structure of the second limiting part 14 according to an embodiment of this application is shown. For example, Figure 8 It can be Figure 6 and Figure 7 A schematic diagram of the structure of the second limiting part 14 shown.

[0100] like Figures 6 to 8As 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 first wall 201, but the embodiments of this application are not limited to this.

[0101] In this embodiment, the second limiting part 14 is separately provided and connected to the discharge pipe 12 to improve structural flexibility and facilitate processing. For example, the second limiting part 14 and the discharge pipe 12 are connected by welding, or the second limiting part 14 can be glued to the discharge pipe 12 with adhesive, or the second limiting part 14 can be fixedly connected to the discharge pipe 12 with bolts, screws or other connecting parts. This embodiment is not limited to these methods.

[0102] In some embodiments, at least a portion of the second limiting portion 14 is accommodated within the through hole 121. This allows the through hole 121 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 discharge pipe 12 through the through hole 12. The emissions can then be collected and discharged by the discharge pipe 12, 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 through hole 121, the portion of the second limiting portion 14 accommodated within the through hole 121 can be fixed to the through hole 121 using an adhesive.

[0103] It should be understood that the specific structure of the second limiting part 14, which is separately provided from the discharge pipeline 12 in this application embodiment, can be set according to actual application.

[0104] 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 the through hole 121, 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 discharge pipe 12 through the guide tube 144, and then the emissions can be collected and discharged by the discharge pipe 12 to reduce the impact of the high-temperature and high-pressure emissions on other components inside the casing 11 of the battery device 10.

[0105] 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 6 to 8 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 6 to 8 As shown, the limiting structure 143 can surround the flow guide tube 144.

[0106] 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 discharge discharged by the self-decompression mechanism 213 enters the discharge pipe 12 through the guide pipe 144, reducing the overflow of discharge.

[0107] 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.

[0108] In some embodiments, such as Figures 6 to 8As shown, a sealing structure 13 is provided between the end of the first limiting part 215 away from the first wall 201 and the second limiting part 14. For example, the sealing structure 13 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 first wall 201, to improve the sealing performance 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.

[0109] It should be understood that the discharge pipe 12 in this embodiment can be used to discharge the emissions from the battery cell 20. Furthermore, the discharge pipe 12 is also used to inject a fire-fighting medium into the battery cell 20 through the through-hole 121. 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 through-hole 121 of the discharge pipe 12. This fire-fighting medium can reduce the temperature of the battery cell 20 experiencing thermal runaway, reduce the risk of fire and thermal diffusion, thereby reducing the risk of explosion and improving the reliability of the battery device 10.

[0110] 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.

[0111] It should be understood that the discharge of emissions from the battery cell 20 through the discharge pipe 12, and the injection of fire-fighting media into the battery cell 20 through the same discharge pipe 12, can be achieved in various ways. For example, the discharge pipe 12 has two ports arranged along its extension direction, one port for discharging emissions from the battery cell 20 and the other port for injecting fire-fighting media into the battery cell 20.

[0112] 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 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 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 another port to reduce the temperature of the thermally runaway battery cell 20, reduce the risk of fire in 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.

[0113] 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 to inject the fire extinguishing medium into the battery cell 20.

[0114] Figure 9 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 10 An exploded view of a partial structure of the battery cell 20 according to an embodiment of this application is shown, for example, Figure 10 It can be Figure 9 The diagram shows an exploded view of the casing 21 of the battery cell 20.

[0115] In this embodiment, the first wall 201 is provided with a first limiting part 215. The first wall 201 can be any wall of the battery cell 20. For example, along the direction of gravity, the first wall 201 can be 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 the first wall 201 provided with the pressure relief mechanism 213 to facilitate the installation of the discharge pipe 12.

[0116] In some embodiments, such as Figure 9 and Figure 10 As 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.

[0117] 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.

[0118] 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 9 and Figure 10 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.

[0119] In some embodiments, the first wall 201 can be any wall of the housing 21. For example, such as Figure 9 and Figure 10 As shown, the cover plate 212 includes the first wall 201, that is, the cover plate 212 is provided with a first limiting part 215 and a pressure relief mechanism 213 to facilitate processing, but the embodiments of this application are not limited thereto.

[0120] 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.

[0121] In some embodiments, the first wall 201 is 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 one 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 9 and Figure 10 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.

[0122] 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 second limiting part 14 and enter the discharge pipe 12 through the through hole 121. The emissions can then be collected and discharged through the discharge pipe 12 to reduce 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.

[0123] 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.

[0124] In some embodiments, the first wall 201 may also be provided with other components. For example, the first wall 201 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.

[0125] 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.

[0126] 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.

[0127] Figure 11 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 12 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.

[0128] 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.

[0129] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0130] 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 11 and Figure 12 As shown, the housing 30 includes multiple battery compartments 31, each corresponding to a single battery cluster 100; or, unlike... Figure 11 and Figure 12 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.

[0131] 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.

[0132] like Figure 11 and Figure 12As 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1.

[0139] 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 13 A structural block diagram of an energy storage system according to an embodiment of this application is shown. In some embodiments, such as... Figure 13 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.

[0140] According to some embodiments of this application, this application provides a charging network. Figure 14 A structural block diagram of a charging network according to an embodiment of this application is shown. Figure 14 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.

[0141] 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.

[0142] According to some embodiments of this application, see Figures 2 to 8 This application provides a battery device 10, including: a plurality of battery cells 20, each of the battery cells 20 having a first wall 201 provided with a pressure relief mechanism 213 and a first limiting part 215, the first limiting part 215 surrounding the pressure relief mechanism 213 and disposed on the outer surface of the first wall 201; a discharge pipe 12, the discharge pipe 12 including a plurality of through holes 121, the plurality of through holes 121 corresponding one-to-one with the pressure relief mechanism 213 of the plurality of battery cells 20; a plurality of second limiting parts 14, each of the second limiting parts 14 being disposed around a corresponding through hole 121, the first limiting part 215 and the second limiting part 14 cooperating with each other so that the discharge from the pressure relief mechanism 213 enters the discharge pipe 12 through the through hole 121 and is discharged through the discharge pipe 12.

[0143] The second limiting part 14 is separately provided and connected to the discharge pipe 12. At least a portion of the second limiting part 14 is accommodated within the through hole 121. The second limiting part 14 includes a guide pipe 144 and a limiting structure 143. One end of the guide pipe 144 is accommodated within the through hole 121, and the other end of the guide pipe 144 extends toward the pressure relief mechanism 213. The limiting structure 143 surrounds the guide pipe 144 and is used to cooperate with the first limiting part 215. The first limiting part 215 is located between the guide pipe 144 and the limiting structure 143. A sealing structure 13 is provided between the end of the first limiting part 215 away from the first wall 201 and the second limiting part 14.

[0144] The first limiting part 215 and the first wall 201 are integrally formed. Alternatively, the first limiting part 215 and the first wall 201 are separately provided and connected. The first limiting part 215 and the first wall 201 are connected by welding.

[0145] The second limiting part 14 is sleeved on the outer side of the first limiting part 215, away from the pressure relief mechanism 213. The first limiting part 215 has a protruding structure, and the second limiting part 14 has a groove structure, or the first limiting part 215 has a groove structure, and the second limiting part 14 has a protruding structure; wherein the protruding structure is at least partially accommodated in the groove structure. A sealing structure 13 is provided between the protruding structure and the groove structure.

[0146] The battery device 10 also includes a housing 11 for accommodating multiple battery cells 20 and a discharge pipe 12, and the housing 11 is provided with a discharge port 113 for discharging the emissions from the discharge pipe 12 to the outside of the battery device 10.

[0147] 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 the battery cells (20) has a first wall (201) provided with a pressure relief mechanism (213) and a first limiting part (215), the first limiting part (215) surrounding the pressure relief mechanism (213) and provided on the outer surface of the first wall (201); The discharge pipe (12) includes multiple through holes (121), and the multiple through holes (121) correspond one-to-one with the pressure relief mechanism (213) of the multiple battery cells (20); Multiple second limiting parts (14) are provided, each second limiting part (14) is arranged around a corresponding through hole (121), the first limiting part (215) and the second limiting part (14) cooperate with each other so that the discharge from the pressure relief mechanism (213) enters the discharge pipe (12) through the through hole (121) and is discharged through the discharge pipe (12).

2. The battery device according to claim 1, characterized in that, The second limiting part (14) is separately provided and connected to the discharge pipeline (12).

3. The battery device according to claim 2, characterized in that, At least a portion of the second limiting portion (14) is accommodated within the through hole (121).

4. The battery device according to claim 2 or 3, characterized in that, The second limiting part (14) includes a guide tube (144) and a limiting structure (143). One end of the guide tube (144) is accommodated in the through hole (121), 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 part (215).

5. The battery device according to claim 4, characterized in that, The first limiting part (215) is located between the guide tube (144) and the limiting structure (143).

6. The battery device according to claim 5, characterized in that, A sealing structure (13) is provided between the end of the first limiting part (215) away from the first wall (201) and the second limiting part (14).

7. The battery device according to claim 1, characterized in that, The second limiting part (14) and the discharge pipeline (12) are integrally formed.

8. The battery device according to any one of claims 1 to 7, characterized in that, The first limiting part (215) and the first wall (201) are integrally formed; or, The first limiting part (215) is separately provided and connected to the first wall (201).

9. The battery device according to claim 8, characterized in that, The first limiting part (215) is connected to the first wall (201) by welding.

10. The battery device according to any one of claims 1 to 9, characterized in that, The second limiting part (14) is sleeved on the outside of the first limiting part (215) away from the pressure relief mechanism (213).

11. The battery device according to any one of claims 1 to 10, characterized in that, The first limiting part (215) has a protruding structure, and the second limiting part (14) has a groove structure, or, The first limiting part (215) has a groove structure, and the second limiting part (14) has a protrusion structure; The protruding structure is at least partially accommodated within the groove structure.

12. The battery device according to claim 11, characterized in that, A sealing structure (13) is provided between the protruding structure and the groove structure.

13. The battery device according to any one of claims 1 to 12, characterized in that, A sealing structure (13) is provided between the first limiting part (215) and the second limiting part (14).

14. The battery device according to any one of claims 1 to 13, characterized in that, The discharge pipe (12) is also used to inject fire-fighting medium into the battery cell (20) through the through hole (121).

15. The battery device according to any one of claims 1 to 14, characterized in that, The battery device also includes: The housing (11) is used to house the plurality of battery cells (20) and the discharge pipe (12). The housing (11) is provided with a discharge port (113) for discharging the discharge from the discharge pipe (12) to the outside of the battery device.

16. The battery device according to any one of claims 1 to 15, characterized in that, The first wall (201) is provided with two electrode terminals (214), and the pressure relief mechanism (213) is located between the two electrode terminals (214).

17. The battery device according to any one of claims 1 to 16, characterized in that, Along the direction of gravity, the first wall (201) is the top wall or side wall of the battery cell (20).

18. A single battery cell, characterized in that, include: Outer shell (21); A pressure relief mechanism (213) is disposed on the first wall (201) of the outer casing (21); A first limiting part (215) surrounds the pressure relief mechanism (213) and is disposed on the outer surface of the first wall (201). The first limiting part (215) is used to cooperate with the second limiting part (14) of the battery device. The second limiting part (14) is disposed around the through hole (121) of the discharge pipe (12) in the battery device, so that the discharge from the pressure relief mechanism (213) enters the discharge pipe (12) through the through hole (121) and is discharged through the discharge pipe (12).

19. An energy storage device, characterized in that, include: Multiple battery devices according to any one of claims 1 to 17, the battery devices being used to store or provide electrical energy.

20. The energy storage device according to claim 19, characterized in that, The energy storage device also includes: A housing (30) for accommodating a plurality of the battery devices; A manifold (40) is used to connect the discharge pipe (12) to the outside of the silo (30).

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

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

Images