Battery device and electric appliance

Abstract

The application discloses a battery device and an electric device. The battery device comprises a battery cell, a battery box and a flame extinguishing structure. The battery cell is provided with a pressure relief mechanism. The battery box is provided with a first accommodating cavity, a communication channel and a collecting cavity. The battery cell is arranged in the first accommodating cavity. One end of the communication channel is communicated with the first accommodating cavity to receive the exhaust discharged by the pressure relief mechanism. The other end of the communication channel is communicated with the collecting cavity. At least part of the flame extinguishing structure is fixedly arranged in the communication channel and is configured to extinguish the flame in the exhaust flowing through the communication channel. The battery device further comprises a gas sensor and a battery management system. The gas sensor is arranged in the collecting cavity. The battery management system is arranged in the first accommodating cavity and is electrically connected with the battery cell and the gas sensor. The technical scheme can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Improving the reliability of battery devices is a pressing issue in battery technology. Utility Model Content

[0004] The main objective of this application is to provide a battery device and an electrical appliance designed to improve the reliability of the battery device.

[0005] To achieve the above objectives, the battery device proposed in this application includes: Battery cell, the battery cell has a pressure relief mechanism; The battery box includes a first receiving cavity, a connecting channel, and a collecting cavity, with individual battery cells housed within the first receiving cavity. One end of the connecting channel is connected to the first receiving cavity to receive emissions from a pressure relief mechanism, and the other end of the connecting channel is connected to the collecting cavity. A flame extinguishing structure, at least a portion of which is fixedly disposed within a connecting channel and configured to retard flames in emissions flowing through the connecting channel; The battery device also includes a gas sensor and a battery management system, with the gas sensor located inside the collection chamber; The battery management system is located in the first accommodating cavity and is electrically connected to the battery cells and gas sensors.

[0006] The battery device in this application features a communication channel on the battery box that connects to the first accommodating cavity. This allows emissions from the pressure relief valve in the first accommodating cavity to enter the communication channel when a battery cell experiences thermal runaway. The communication channel contains a flame-extinguishing structure that inhibits the flame in the emissions, reducing the spread of the thermal runaway fire. Simultaneously, it prevents flames from easily entering the collection cavity connected to the communication channel, ensuring stable and normal collection of the emissions and reducing the possibility of harmful gas leakage. Therefore, the battery device in this application effectively suppresses the spread of thermal runaway fire while reliably collecting harmful gases, reducing the impact on the surrounding environment and personnel, and ultimately improving the reliability of the battery device. Furthermore, the battery device in this application also includes a gas sensor. When the gas sensor detects a specific characteristic gas in the collection chamber, it can transmit the signal to the battery management system. The battery management system can then determine that thermal runaway has occurred in the battery device and promptly activate corresponding protective measures such as power-off, thereby further improving the reliability of the battery device. In addition, since the gas sensor is located within the collection chamber, which is downstream of the emission flow path from the connecting channel, the emissions are treated with a flame-retardant structure before entering the collection chamber. This makes it less likely that emissions from individual battery cells during thermal runaway will damage the gas sensor, facilitating stable detection and further improving the reliability of the battery device.

[0007] In some embodiments, the communication channel includes a channel body and a communication hole, the communication hole being in communication with the first accommodating cavity; The main body of the channel is connected to the connecting hole and the collecting chamber, and at least part of the flame extinguishing structure is fixedly installed inside the main body of the channel.

[0008] Therefore, at least part of the flame-extinguishing structure is set inside the channel body, which has a relatively large space, allowing for the installation of more flame-extinguishing structures to retard flames in the emissions flowing through the connecting channel, thereby improving the suppression and elimination effect on flames mixed in with the emissions.

[0009] In some embodiments, the flame extinguishing structure includes a first part and a second part, with the first part being provided within the channel body; The second part corresponds to the connecting hole and is configured to seal the connecting hole.

[0010] This allows thermal runaway emissions from a single battery cell to undergo initial flame retardation via the second section at the connecting hole after discharge, followed by flame retardation via the first section upon entering the main channel body. This dual flame retardant mechanism enhances the suppression and elimination of flames. Simultaneously, the second sections at other connecting holes can also block flames within the connecting channel and / or collection chamber, reducing the possibility of flames from these areas potentially impacting other battery cells.

[0011] In some embodiments, the second portion is disposed outside the connecting hole and is located on the side where the connecting hole connects to the first accommodating cavity.

[0012] Therefore, the second part can be arranged on the outside of the connecting hole, and the space on the outside is relatively large, making it convenient to arrange.

[0013] In some embodiments, the connecting hole is connected to the pressure relief mechanism of the battery cell.

[0014] This arrangement places the connecting channel close to the pressure relief mechanism, allowing the emissions from the pressure relief mechanism to enter the connecting channel in a timely manner and be flame-retarded by the flame-extinguishing structure, thus reducing the impact of the emissions on surrounding battery cells or other structures.

[0015] In some embodiments, the number of battery cells is multiple, the communication channel includes multiple communication holes, each communication hole is connected to a pressure relief mechanism of a battery cell, and the channel body is connected to the multiple communication holes. Therefore, multiple battery cells can share a single connection channel, which reduces the number of connection channels required, thereby simplifying the structural design of the battery device.

[0016] In some embodiments, the number of battery cells and the number of connecting channels are multiple, and the connecting hole of each connecting channel is connected to the pressure relief mechanism of a battery cell.

[0017] Therefore, different battery cells can use corresponding connecting channels, so that when there is a flame in the connecting channel corresponding to a certain battery cell, the impact of the flame in that connecting channel on other battery cells can be reduced.

[0018] In some embodiments, the channel body includes a first channel and a second channel, the first channel being connected to a connecting hole and located on a different side of the battery cell from the collection cavity; The second channel is set at an angle to the first channel and is connected to the first channel and the collection chamber. At least the first channel has a flame extinguishing structure in its main body.

[0019] Therefore, placing the first channel and the collection chamber on different sides of the battery cell allows for better utilization of the space on each side of the battery cell, improving the compactness of the structural distribution and reducing the overall size of the battery device. Simultaneously, this extends the length of the connecting channel, lengthening the flow path of the emissions and providing more space for depressurization and more time for cooling, thus improving the depressurization and cooling effects. Furthermore, the presence of a flame-retardant structure within at least the first channel allows this structure to be positioned upstream in the emissions' flow path, enabling it to promptly retard the emissions and effectively suppress the spread of thermal runaway fires.

[0020] In some embodiments, the first channel and the connecting hole are disposed on one side of the battery cell in the first direction, and the collecting cavity is disposed on the other side of the battery cell in the first direction; The second channel extends along the first direction and connects the second channel with the collection chamber. At least the first channel in the main body of the channel is provided with a flame extinguishing structure.

[0021] Therefore, by placing the first channel and the collection chamber in the main channel body on opposite sides of the battery cell in the first direction, and extending the second connection along the first direction, the connection channel, collection chamber, and battery cell can be more compactly distributed, thereby reducing the overall volume of the battery device. Simultaneously, this arrangement also enhances the effect of extending the length of the connection channel, further extending the flow path of the emissions, and thus improving the depressurization and cooling effect on the emissions.

[0022] In some embodiments, both the first channel and the second channel are provided with flame extinguishing structures.

[0023] This allows the emissions to be contained within the entire flow path of the channel body, with flame-suppressing structures that can suppress and eliminate flames, thereby further improving the effect of suppressing the spread of thermal runaway.

[0024] In some embodiments, the channel body includes a first channel, which communicates with a connecting hole and is located on one side of the battery cell in a first direction; The first channel is equipped with a flow guide, and the projection of the flow guide is offset from the projection of the connecting hole on the projection plane perpendicular to the first direction.

[0025] Therefore, the guide vane can guide the emissions entering the first channel, allowing them to flow orderly into the second channel for accurate collection in the collection chamber. Simultaneously, the guide vane extends the flow path of the emissions, thereby increasing the contact time between the emissions and the flame-extinguishing structure located in the first channel, enabling the flame-extinguishing structure to more effectively suppress and eliminate flames trapped within the emissions.

[0026] In some embodiments, two walls on both sides of the guide member in a first direction are connected to the channel wall of the first channel, and the remaining walls of the guide member are spaced apart from the channel wall of the first channel.

[0027] Therefore, by connecting the walls on both sides of the guide member in the first direction to the channel wall, the exhaust material can make full contact with the side circumferential surface of the guide member, thereby improving the guiding effect of the guide member on the exhaust material. By spaced the side circumferential surface of the guide member from the channel wall, the flow path of the exhaust material can be enriched, allowing the exhaust material to disperse and achieve more sufficient contact with the flame suppression structure, thus further improving the flame suppression structure's effect on suppressing and eliminating flames trapped within the exhaust material.

[0028] In some embodiments, there are multiple flow guides, which divide the first channel into multiple sub-channels, and at least some of the sub-channels are cross-connected.

[0029] This allows for more diverse pathways in the sub-channels, improving the dispersion of emissions and their contact with the flame-extinguishing structure, which in turn enhances the flame-extinguishing structure's ability to suppress and eliminate flames trapped within the emissions.

[0030] In some embodiments, the first channel is provided with a second channel on at least one side in the second direction, the second channel is connected to the first channel and the collection cavity, and the second direction intersects the first direction; The plurality of flow guides include a first flow guide, which is arranged side by side at intervals along a second direction. The extension direction of the first flow guide intersects the second direction but is not perpendicular to it.

[0031] This allows the first guide member to guide the emissions through its side circumferential surfaces on both sides in the second direction, so that the emissions flow accurately to the second channel located on at least one side of the first channel in the second direction.

[0032] In some embodiments, the communication channel includes a plurality of communication holes, and the first channel is connected to the plurality of communication holes; Multiple connecting holes are arranged at intervals along the second direction, and each first guide element is located between two adjacent connecting holes.

[0033] Thus, by corresponding the connecting hole with the sub-channel formed by the two adjacent first guide members, the discharge entering through the connecting hole can directly enter between the adjacent first guide members, thereby facilitating its guidance by the first guide members.

[0034] In some embodiments, a plurality of first guide elements arranged at intervals along a second direction form a first guide element group, and the plurality of guide elements includes at least two first guide element groups; At least two first guide element groups are arranged side by side at intervals along a third direction, with the first direction, the second direction, and the third direction intersecting each other.

[0035] Therefore, a single connecting channel can be shared by more battery cells, thereby reducing the number of connecting channels required and simplifying the structural design of the battery device.

[0036] In some embodiments, the plurality of guide members further includes a second guide member, which extends along a second direction; A second flow guide is provided between two adjacent first flow guide groups, and the second flow guide is spaced apart from the first flow guide group.

[0037] Therefore, the second guide component can block and guide the emissions, improving the orderliness of the emissions flow in the first channel so that they can flow accurately to the second channel.

[0038] In some embodiments, the second guide member is provided with a first guide surface, and the channel wall of the first channel is provided with a second guide surface; In the first guide member group, among the two first guide members located at both ends, the first guide surface is arranged at a relative interval with one first guide member, and the second guide surface is arranged at a relative interval with the other first guide member.

[0039] Therefore, the arrangement of the first and second guiding surfaces allows sub-channels to still be formed at both ends of the first guide assembly in the second direction, thereby improving the guiding effect on the emissions.

[0040] In some embodiments, the number of second channels is at least two, wherein the two second channels are respectively located on both sides of the first channel in the second direction and on both sides of the first channel in the third direction, and the first direction, the second direction and the third direction intersect each other.

[0041] Therefore, by setting up two diagonally arranged second channels, each position in the first channel can be relatively close to one of the second channels, which helps to improve the uniformity of the overall flow path of the first channel, so as to accurately collect the emissions from different positions in the first channel.

[0042] In some embodiments, the battery box includes: The box body has an installation cavity and a collection cavity arranged along a first direction, and a first isolation wall located between the installation cavity and the collection cavity. At least a portion of the installation cavity is formed as a first receiving cavity; and The channel shell includes a plate-shaped portion and a convex cylindrical portion. The plate-shaped portion is located on the side of the battery cell facing away from the collection chamber and has a connecting hole and a first channel. The convex cylindrical portion extends along a first direction and has a second channel.

[0043] Therefore, by forming the mounting cavity, the collection cavity, and the connecting channel through the box body and the channel shell respectively, the mounting cavity, the collection cavity, and the connecting channel can be processed and formed separately and independently, reducing the complexity of processing and forming, and thus improving the convenience of battery device processing and manufacturing.

[0044] In some embodiments, the plate-shaped portion and the protruding cylindrical portion are disposed within the mounting cavity, and the outer sides of the plate-shaped portion and the protruding cylindrical portion partially enclose the mounting cavity to form a first receiving cavity; The end of the convex cylindrical portion away from the plate-shaped portion passes through the first partition wall, or the first partition wall is provided with a first hole that communicates with the end of the convex cylindrical portion away from the plate-shaped portion.

[0045] Therefore, by placing both the plate-shaped portion and the protruding cylindrical portion within the mounting cavity, they can be located within the casing, thereby improving the compactness of the distribution among the various mechanisms of the battery device. Simultaneously, the casing body also provides isolation and protection for the plate-shaped portion and the protruding cylindrical portion.

[0046] In some embodiments, the battery box includes: The first housing, with one end open; and The second box has a collection chamber and can be detachably covered by the opening of the first box; The second housing and the first housing together form an installation cavity, and the second housing has a first isolation wall.

[0047] Therefore, the battery box is split into a first box and a second box, allowing them to be manufactured independently and then assembled together to form the mounting cavity. The separate first and second box structures are relatively simple, thus improving the ease of machining the mounting cavity. Simultaneously, placing the collection cavity separately within the second box prevents it from being affected by the interface between the second and first boxes, thereby improving the sealing of the collection cavity and enhancing the reliability of emission collection. The second box is detachable, allowing it to be removed and replaced during subsequent battery device processing. Simultaneously, it can be used to replace battery cells that have experienced thermal runaway, enabling the battery device to be reused, thus improving its environmental friendliness.

[0048] In some embodiments, the battery device further includes a heat exchange mechanism having a medium flow channel; The heat exchange mechanism is located in the first accommodating cavity and is configured to be heat-exchange connected to the outer side of the battery cell and the channel wall of the connecting channel.

[0049] Therefore, in addition to heat exchange for individual battery cells, this heat exchange mechanism can further cool down the emissions flowing through the main channel, reducing the possibility of secondary fires caused by excessively high temperatures in the discharged emissions, thereby further improving the reliability of the battery device.

[0050] In some embodiments, the heat exchange mechanism is provided with a second receiving cavity, and a medium flow channel surrounds the outside of the second receiving cavity; The heat exchange mechanism has a second isolation wall located between the second accommodating cavity and the medium flow channel. The battery cell is disposed in the second accommodating cavity, and the second isolation wall and the battery cell are heat exchange connected. The heat exchange mechanism has a second orifice at the position of the pressure relief mechanism of the corresponding battery cell, and the second orifice is connected to the second accommodating cavity.

[0051] Therefore, the second accommodating cavity can accommodate individual battery cells, enabling the heat exchange mechanism to perform encapsulated heat exchange on the battery cells. This increases the heat exchange area between the heat exchange mechanism and the battery cells, thereby improving the heat exchange efficiency. Furthermore, it reduces the possibility of large temperature differences at different locations within the battery cells due to localized heat exchange, resulting in more uniform temperature distribution throughout the battery cells and thus improving their performance and lifespan.

[0052] In some embodiments, the heat exchange mechanism includes an inner frame and an outer structure, a pressure relief mechanism is disposed on one side of the battery cell in a first direction, the inner frame is open at least one end in the first direction, a second accommodating cavity is provided on the inner side of the inner frame, and the inner frame has a second isolation wall. The outer structure is located on the outside of the inner frame and forms a medium flow channel with the outer side of the inner frame. The outer structure is heat-exchange connected to the outer side of the channel wall of the connecting channel. The inner frame and / or the outer structure are provided with a second hole.

[0053] Therefore, the inner frame and the outer structure can be manufactured separately and independently. The inner frame has a relatively simple structure, which makes it easy to form a second accommodating cavity inside it. At the same time, the medium flow channel can also be formed by directly enclosing the inner frame and the outer structure after assembly, which is relatively simple in structure. This will help improve the convenience of processing and forming the second accommodating cavity and the medium flow channel.

[0054] In some embodiments, the communication channel includes a first channel and a second channel, the first channel being connected to a first accommodating cavity and disposed on the side of the battery cell having a pressure relief mechanism; The second channel extends along the first direction and connects to the first channel and the collection chamber; The outer structure is configured to be heat-exchange connected to at least one side of the first channel and the second channel.

[0055] Therefore, configuring the connecting channels as a first channel and a second channel arranged at an angle facilitates the connection of at least one of them with the surrounding structure for heat exchange. Simultaneously, this configuration also improves the compactness of the structural layout.

[0056] In some embodiments, the peripheral structure includes an outer frame and two cover plates, with both ends of the inner frame and the outer frame being open in a first direction, and the outer frame being spaced around the outer side of the inner frame. Two cover plates are respectively fitted onto the two sides of the inner frame and the outer frame that have openings. The outer side of the inner frame, the outer frame, and the two cover plates enclose the medium flow channel. The cover plate opposite to the pressure relief mechanism is provided with a second hole and is heat-exchange connected to the outer side of the channel wall of the first channel.

[0057] Therefore, the outer structure is further divided into an outer frame and two cover plates, allowing each to be manufactured independently and then assembled to form a media flow channel. The structures of the separate outer frame and two cover plates are relatively simple, which facilitates the processing and shaping of the media flow channel. Furthermore, the cover plate with a second perforation allows for easy stacking with the outer wall of the first channel, thereby improving the cooling effect on the discharged material within the first channel.

[0058] In some embodiments, the inner frame includes a plurality of cylindrical sections arranged side by side and connected in sequence, and each cylindrical section has a second accommodating cavity on its inner side.

[0059] Therefore, since each cylindrical section can accommodate one battery cell, one heat exchange mechanism can be used for multiple battery cells. This reduces the number of heat exchange mechanisms required, simplifying the structural design and thus improving the ease of manufacturing the battery device.

[0060] In some embodiments, the number of inner frame bodies is at least two, and the at least two inner frame bodies are arranged side by side with intervals. The heat exchange mechanism also includes a flow-dispersing element, which is disposed between adjacent inner frames and spaced apart from the inner frames, and extends along a first direction.

[0061] Therefore, the arrangement of at least two inner frames can further reduce the number of heat exchange mechanisms required, thus simplifying the structural design. Furthermore, the flow-disrupting elements can turbulently flow through the heat exchange medium within the flow channels, continuously disrupting and thinning the thermal boundary layer to reduce thermal resistance; or they can induce eddies and turbulence, enhancing the macroscopic mixing of hot and cold fluids, thereby creating a more efficient heat exchange environment and improving the heat exchange performance of the heat exchange mechanism.

[0062] In some embodiments, the heat exchange mechanism further includes at least one partition, which is disposed in the medium flow channel and divides the medium flow channel into at least two sub-flow channels arranged along a first direction; The heat exchange mechanism also includes two manifolds, which are located on the outside of the outer frame. The flow collector is provided with a flow collection cavity and at least two flow distribution channels. The at least two flow distribution channels are connected to the flow collection cavity, and each sub-flow channel is connected to one flow distribution channel of each of the two flow collectors.

[0063] Therefore, the medium flow channel can be divided into at least two sub-channels, so that the heat exchange medium can be distributed to each sub-channel, reducing the possibility of the heat exchange medium accumulating on the lower side under gravity, thereby improving the flowability of the heat exchange medium and thus improving the heat exchange effect of the heat exchange mechanism. The manifold allows for liquid inlet to multiple sub-channels through one manifold and liquid outlet to multiple sub-channels through another manifold, simplifying the pipeline structure design.

[0064] In some embodiments, the outer frame has a notch that penetrates the inner and outer sides of the outer frame and extends along a first direction; The collector has a protrusion that is housed within a notch, and the end of the diversion channel away from the collector cavity passes through the protrusion.

[0065] Therefore, a notch is provided in the outer frame so that the protrusion on the collector can be inserted into the notch. This facilitates the connection between the end of the diversion channel away from the collector cavity and the sub-channel, and also allows the notch to be sealed by the protrusion, thereby improving the sealing effect and compactness of the overall structure.

[0066] In some embodiments, the separator is provided with a plug at the position of the corresponding diversion channel. The plug is inserted into the diversion channel, and one side of the plug in the first direction is spaced apart from the channel wall of the diversion channel.

[0067] Therefore, by inserting the plug-in post on the separator into the flow distribution channel of the collector, the separator and collector can be assembled. The plug-in operation is relatively simple, thus improving the ease of assembly between the separator and collector. The notch in the outer frame allows the assembled separator and collector assembly to be directly inserted between the outer and inner frames along the first direction, further enhancing the ease of assembly between the outer and inner frames.

[0068] In some embodiments, a recessed space is provided on the outer side of the outer frame, the notch is connected to the recessed space, and the current collector is disposed in the recessed space.

[0069] Therefore, the recessed space provides space for the current collector to be installed, allowing the current collector and the outer frame to be distributed more compactly. After installation, the overall shape of the heat exchange mechanism can be more regular, which helps to reduce the space occupied by the heat exchange mechanism and improves the convenience of its installation and arrangement in the battery box.

[0070] In some embodiments, at least one of the outer frame and the manifold is heat-exchange connected to the outer side of the channel wall of the second channel.

[0071] This allows the heat exchange mechanism to also cool the emissions in the second channel, further improving the cooling effect on the emissions.

[0072] In some embodiments, the outer frame is provided with a third accommodating cavity, and the outer frame has a third isolation wall located between the medium flow channel and the third accommodating cavity; The heat exchange mechanism of the battery device also includes a filler, which is a heat insulation structure or a phase change energy storage structure, and is located in the third accommodating cavity.

[0073] Therefore, by further incorporating an insulation structure or phase change energy storage structure into the outer frame, the insulation structure can insulate the outer frame, reducing the impact of excessive temperature difference between the battery cells and the external environment when the ambient temperature outside the battery device is relatively low, thus optimizing the thermal management of the battery cells. The phase change energy storage structure, on the other hand, can absorb and store heat generated by the battery cells through the outer frame. Later, when the ambient temperature outside the battery device is relatively low, the phase change energy storage structure can release heat to heat the battery cells, similarly optimizing the thermal management of the battery cells.

[0074] In some embodiments, the flame-retardant structure includes a chemical flame retardant.

[0075] This allows the flame-extinguishing structure to interrupt the combustion chain reaction at the chemical level, improving the reliability and efficiency of flame suppression and elimination.

[0076] In some embodiments, the battery device further includes an alarm located in the battery compartment and electrically connected to the battery management system.

[0077] Therefore, an alarm can be triggered in the event of thermal runaway, thus serving as a further warning of thermal runaway and facilitating appropriate protective measures by personnel.

[0078] In some embodiments, the battery compartment is provided with a vent, and the battery device further includes a control valve located at the vent and configured to control the opening and closing of the vent.

[0079] Therefore, when treating the emissions collected in the collection chamber, the control valve can be opened to accurately transport the emissions to the treatment location through the pipeline, thereby improving the convenience of emissions treatment. The control valve can be a solenoid valve or an electric valve.

[0080] On the other hand, the electrical equipment proposed in this application includes the battery device in any of the above embodiments.

[0081] In some embodiments, the electrical equipment has a sealed compartment, and the battery device is disposed inside the sealed compartment.

[0082] Therefore, the battery device is isolated in a sealed compartment away from human activity, so as to reduce the impact on the surrounding environment and personnel in the event of thermal runaway of the battery device. Attached Figure Description

[0083] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0084] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application; Figure 2 This is a schematic diagram of the assembly structure of an embodiment of the battery device of this application; Figure 3 for Figure 2 A cross-sectional schematic diagram of the battery device; Figure 4 for Figure 3 A partial structural diagram; Figure 5 for Figure 2 Another cross-sectional view of the battery device; Figure 6 for Figure 5 A partial structural diagram; Figure 7 for Figure 2 A schematic diagram of the exploded structure of the battery device; Figure 8 for Figure 7 Another exploded structural diagram of the battery device; Figure 9 for Figure 8 A schematic diagram of the exploded structure of the battery pack; Figure 10 for Figure 9 Schematic diagram of the central channel shell; Figure 11 for Figure 10 Schematic diagram of the exploded structure of the central channel shell; Figure 12 for Figure 2 Another cross-sectional schematic diagram of the battery device; Figure 13 for Figure 2 Another cross-sectional schematic diagram of the battery device; Figure 14 for Figure 8 Schematic diagram of the heat exchange mechanism in the middle; Figure 15 for Figure 14 A cross-sectional schematic diagram of the heat exchange mechanism; Figure 16 for Figure 14 Exploded structural diagram of the heat exchange mechanism; Figure 17 for Figure 16 Structural diagram of the inner frame and outer frame; Figure 18 for Figure 16 Schematic diagram of the structure of the two cover plates; Figure 19 for Figure 16 Schematic diagram of the middle partition; Figure 20 for Figure 19 Another perspective view of the central partition; Figure 21 for Figure 16 A schematic diagram of the flow element structure.

[0085] Explanation of icon numbers: 100. Battery assembly; 10. Battery cell; 11. Pressure relief mechanism; 13. Busbar; 10A. Battery pack; 30. Battery box; 31. First receiving cavity; 33. Box body; 331. Mounting cavity; 332. First housing; 333. Second housing; 334. Collection cavity; 335. First partition wall; 35. Channel shell; 351. Connecting channel; 352. Channel body; 353. First channel; 354. Flow guide; 355. The... 356. First flow guide component; 357. Second flow guide component; 358. First guide surface; 359. Second guide surface; 360. Connecting hole; 361. Second channel; 362. Plate-shaped part; 363. Plate body; 364. Receiving groove; 365. Cover plate; 366. Through hole; 367. Protruding cylindrical part; 370. Sub-channel; 50. Flame extinguishing structure; 51. First part; 53. Second part; 70. Heat exchange mechanism; 70a 70a1, Sub-channel; 70b, Second accommodating cavity; 71, Inner frame; 711, Second partition wall; 713, Cylinder section; 80, Peripheral structure; 72, Outer frame; 721, Notch; 723, Recessed space; 724, Third accommodating cavity; 725, Third partition wall; 73, Cover plate; 731, Second hole; 733, Positioning protrusion; 735, Third hole; 74, Baffle; 75, Separator; 751, Insert 753. Connecting post; 75A. Fourth hole body; 75B. End separator; 75A1. Intermediate separator; 75A1. Insertion slot; 76. Collector; 761. Collector cavity; 763. Diverter channel; 765. Protrusion; 77. Heat-conducting component; 78. Buffer component; 79. Filler component; 85. Gas sensor; 90. Delivery pipe; 200. Controller; 300. Motor; 1000. Vehicle; Z, First direction; X, Second direction; Y, Third direction.

[0086] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0087] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0088] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0089] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0090] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0091] A battery device, or energy storage device, is widely used not only in energy storage systems such as hydroelectric, thermal, wind, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace equipment such as rockets, space shuttles, and manned spacecraft, and other fields. A battery device can include a battery box and individual battery cells housed within the battery box. The battery box houses the individual battery cells. Each individual battery cell is the smallest unit of a battery, typically including a casing and an electrode assembly within the casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and may include a positive electrode, a negative electrode, and a separator between them, formed by winding or stacking the positive electrode, negative electrode, and separator. Furthermore, at least two individual battery cells within the battery box can be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0092] Furthermore, during use, battery devices may experience thermal runaway due to unforeseen circumstances. When thermal runaway occurs, the battery device is prone to ignition and the release of harmful gases, causing pollution and damage to the surrounding environment and posing a threat to nearby personnel. This is particularly true in aerospace applications such as rockets, space shuttles, and manned spacecraft, where higher reliability requirements are placed on battery devices, often requiring them to be installed in sealed spaces. Therefore, how to effectively handle thermal runaway in battery devices to minimize the impact on the surrounding environment and personnel, and thus improve the reliability of battery use, is a pressing technical problem that needs to be solved in battery technology.

[0093] Therefore, based on the above considerations, in order to improve the reliability of the battery device, this application proposes a novel battery device. This battery device innovatively features a connecting channel and a collection chamber, with the connecting channel connecting a first housing chamber containing the battery cells and the collection chamber. Simultaneously, a flame-extinguishing structure is provided within the connecting channel so that, in the event of thermal runaway of the battery cells, the flame-extinguishing structure can suppress the spread of the thermal runaway fire, and the collection chamber reliably collects the gases emitted during thermal runaway, reducing the impact on the surrounding environment and personnel, and improving the reliability of the battery device.

[0094] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, aerospace equipment, etc. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while aerospace equipment can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0095] In one embodiment of this application, the electrical equipment may be provided with a sealed chamber, and the battery device may be placed inside the sealed chamber so that the battery device can be isolated in the sealed chamber away from human activity, thereby reducing the impact on the surrounding environment and personnel when the battery device experiences thermal runaway.

[0096] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0097] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0098] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0099] Please refer to the reference. Figures 2 to 8 In one embodiment of this application, the battery device 100 includes a battery cell 10, a battery box 30, and a flame extinguishing structure 50. The battery cell 10 has a pressure relief mechanism 11. The battery box 30 is provided with a first accommodating cavity 31, a connecting channel 351, and a collecting cavity 334. The battery cell 10 is disposed in the first accommodating cavity 31. One end of the connecting channel 351 is connected to the first accommodating cavity 31 to receive the discharge discharged by the pressure relief mechanism 11, and the other end of the connecting channel 351 is connected to the collecting cavity 334. At least a portion of the flame extinguishing structure 50 is disposed in the connecting channel 351.

[0100] A battery cell 10 refers to the smallest unit that makes up the battery device 100. The battery cell 10 can be a cylindrical battery, a prismatic battery, or other types of batteries; this application does not limit the type of battery cell 10. Furthermore, each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The shape of the battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0101] Additionally, the battery cell 10 may include a casing, end caps, and electrode assemblies. The casing can house the electrode assemblies and electrolyte. When the battery cell 10 is a cylindrical battery, the casing can be cylindrical; when the battery cell 10 is a prismatic battery, the casing can be cuboid. That is, this application does not limit the shape of the casing. The end cap can close onto the opening of the casing to isolate the internal environment of the battery cell 10 from the external environment. The electrode assembly is the component in the battery cell 10 where the electrochemical reaction occurs, and the casing may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative electrode tabs can be located together at one end of the electrode body or separately at both ends of the electrode body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the terminals on the end cap to form a current circuit. When the battery cell 10 is a cylindrical battery, the positive electrode, negative electrode, and separator in the electrode assembly can be wound into shape; when the battery cell 10 is a prismatic battery, the positive electrode, negative electrode, and separator in the electrode assembly can be wound into shape or stacked into shape.

[0102] Furthermore, the number of battery cells 10 can be multiple. Multiple battery cells 10 can be connected in series, parallel, or a combination thereof; a combination thereof means that multiple battery cells 10 are connected in both series and parallel. Additionally, multiple battery cells 10 can be arranged in one direction to form a battery pack 10A. The battery device 100 may include only one battery pack 10A, or it may include at least two battery packs 10A arranged side-by-side. Further, the battery device 100 may also include a busbar 13 for electrical connection between multiple battery cells 10.

[0103] Additionally, the pressure relief mechanism 11 of the battery cell 10 can also be called an explosion-proof valve or a pressure relief valve. This allows the pressure relief mechanism 11 to open and release pressure when the gas pressure inside the battery cell 10 reaches its opening threshold in the event of thermal runaway. The pressure relief mechanism 11 can be located on the housing of the battery cell 10, or it can be located on the end cap of the battery cell 10. This application does not limit the location of the pressure relief mechanism 11 on the battery cell 10.

[0104] The battery box 30 can be used to form a first accommodating cavity 31, a connecting channel 351, and a collecting cavity 334, so that the battery cell 10 can be accommodated through the first accommodating cavity 31, thereby providing isolation and protection for the battery cell 10. The connecting channel 351 can be used to connect the first accommodating cavity 31 and the collecting cavity 334, and to receive the emissions discharged by the pressure relief mechanism 11. Receiving the emissions discharged by the pressure relief mechanism 11 means that when the battery cell 10 experiences thermal runaway, the emissions discharged by the pressure relief mechanism 11 can enter the connecting channel 351. In this case, there are two possibilities: the pressure relief mechanism 11 and the end of the connecting channel 351 furthest from the collecting cavity 334 are directly connected. Alternatively, the end of the pressure relief mechanism 11 and the end of the connecting channel 351 furthest from the collecting cavity 334 may be offset, and they are indirectly connected through the first accommodating cavity 31. That is, the emissions discharged by the pressure relief mechanism 11 can enter the first receiving cavity 31, and then enter the connecting channel 351 connected to the first receiving cavity 31. The emissions discharged by the connecting channel 351 can be collected by the collection cavity 334, so that the emissions discharged by the pressure relief mechanism 11 can be collected first, and then the collected gas can be treated when the electrical equipment is in a treatable environment. For example, when the electrical equipment is aerospace equipment, the battery device 100 that has experienced thermal runaway can be treated after the aerospace equipment returns to the ground. In addition, the emissions discharged by the pressure relief mechanism 11 mainly refer to the ejected material when the battery cell 10 experiences thermal runaway, including gas, and may also contain particles or flames.

[0105] Alternatively, the battery case 30 may include a case body 33 and a channel shell 35, as described below, with the mounting cavity 331 and the collection cavity 334 formed by the case body 33 respectively forming at least a portion of the first receiving cavity 31 and the collection cavity 334, while the channel shell 35 forms a communicating channel 351. Since the channel shell 35 may be located inside or outside the case body 33, it can be formed from at least a portion of the mounting cavity 331 to form the first receiving cavity 31. For example, when the channel shell 35 is located within the mounting cavity 331 of the case body 33, the first receiving cavity 31 can be formed by the outer side of the channel shell 35 and a portion of the mounting cavity 331. In this case, the mounting cavity 331 can be divided into two parts, one of which is used to house the channel shell 35, and the other can be used to form the first receiving cavity 31. Of course, the mounting cavity 331 may also include other parts to accommodate other components in the battery device 100, in addition to the aforementioned two parts. When the channel shell 35 is located outside the box body 33, the first receiving cavity 31 can be formed by the entire mounting cavity 331. Of course, in other embodiments, the battery box 30 may only include the box body 33, which is provided with the first receiving cavity 31 and the collection cavity 334; at the same time, a connecting channel 351 is directly provided in the box wall of the box body 33. Alternatively, the battery box 30 may include the box body 33, the auxiliary box, and the connecting pipe, with the box body 33 provided with the first receiving cavity 31, the auxiliary box provided with the collection cavity 334, and the connecting pipe connecting the box body 33 and the auxiliary box, and providing a connecting channel 351. This application does not limit the structural type of the battery box 30.

[0106] Furthermore, the battery box 30 can be rectangular, or it can be cylindrical, cubic, or other shapes; this application does not limit the shape of the battery box 30. The first accommodating cavity 31 can be cylindrical, cubic, or other shapes; this application does not limit the shape of the first accommodating cavity 31. Moreover, the shape of the first accommodating cavity 31 can be the same as the shape of the battery box 30, or it can be different. The collecting cavity 334 can be cylindrical, cubic, or other shapes; this application does not limit the shape of the collecting cavity 334. Moreover, the shape of the collecting cavity 334 can be the same as the shape of the battery box 30, or it can be different. The connecting channel 351 can be linear, or it can be zigzag, arc-shaped, or curved, etc.; this application does not limit the extension shape of the connecting channel 351. In addition, on a cross-section perpendicular to the extension direction of the connecting channel 351, the cross-section of the connecting channel 351 can be rectangular, square, or circular, etc.; this application does not limit the cross-sectional shape of the connecting channel 351. Furthermore, the number of connecting channels 351 can be one, two, or more; this application does not limit the number of connecting channels 351. When there is one connecting channel 351, all battery cells 10 can share one connecting channel 351. When there are at least two connecting channels 351, at least two battery cells 10 can share one connecting channel 351. Additionally, the connecting channel 351 can be entirely located on the same side of the battery cell 10 as the collection cavity 334; alternatively, the connecting channel 351 can be partially located on the same side of the battery cell 10 as the collection cavity 334, and partially located on the opposite or adjacent side of the same side of the battery cell 10; or, the connecting channel 351 can be partially located on the opposite side of the battery cell 10 as the collection cavity 334, and partially located on the adjacent side of the battery cell 10; or, the connecting channel 351 can be entirely located on the adjacent side of the battery cell 10 as the collection cavity 334. This application does not limit the location of the connecting channel 351 and the collection cavity 334.

[0107] The flame extinguishing structure 50 can be used to suppress and eliminate flames mixed in with the emissions from the pressure relief mechanism 11. The flame extinguishing structure 50 can suppress and eliminate flames using flame-retardant methods, including chemical and physical flame retardancy. When using chemical flame retardancy, the flame extinguishing structure 50 can be a chemical flame retardant, as described below, capable of decomposing or reacting at high temperatures, actively extinguishing flames by absorbing heat, decomposing, or releasing free radical scavengers. When using physical flame retardancy, the flame extinguishing structure 50 can include stainless steel corrugated strips or sintered metal mesh, limiting flame propagation through gap dimensions so that the flame is cooled upon passage. It should also be noted that physical and chemical flame retardancy can be used individually or in combination. Furthermore, the fact that at least a portion of the flame-extinguishing structure 50 is fixedly disposed within the connecting channel 351 means that the flame-extinguishing structure 50 can be entirely disposed within the connecting channel 351, or partially disposed within the connecting channel 351 with a portion disposed in other locations, such as the first accommodating cavity 31 or the collecting cavity 334, as long as the connecting channel 351 has the flame-extinguishing structure 50. The fixed disposal of the flame-extinguishing structure 50 means that the flame-extinguishing structure 50 located within the connecting channel 351 can be limited within the connecting channel 351 through various connection methods such as adhesive bonding or solidification bonding. Furthermore, in the extending direction of the connecting channel 351, the connecting channel 351 can have only a portion of the channel section equipped with the flame-extinguishing structure 50, or it can be entirely equipped with the flame-extinguishing structure 50. When the connecting channel 351 can have only a portion of the channel section equipped with the flame-extinguishing structure 50, the location of the flame-extinguishing structure 50 can be one end of the connecting channel 351 near the pressure relief mechanism 11, one end near the collecting cavity 334, or another location. Furthermore, in a cross-section perpendicular to the extending direction of the connecting channel 351, the flame-extinguishing structure 50 can either cover a portion of the cross-section of the connecting channel 351 or cover the entire connecting channel 351. When the flame-extinguishing structure 50 covers a portion of the cross-section of the connecting channel 351, the flame-extinguishing structure 50 can be circumferentially fitted to the channel wall of the connecting channel 351, and the middle can be a hollow structure. Of course, the flame-extinguishing structure 50 can also be a solid structure, and only partially fitted to the channel wall of the connecting channel 351 in the circumferential direction.

[0108] The battery device 100 in this application has a connecting channel 351 on the battery box 30 that communicates with the first accommodating cavity 31. This allows the emissions from the pressure relief valve of the battery cell 10 located in the first accommodating cavity 31 to enter the connecting channel 351 when thermal runaway occurs. At this time, the flame-extinguishing structure 50 installed in the connecting channel 351 can extinguish the flames in the flowing emissions, reducing the spread of the thermal runaway fire. Simultaneously, it also makes it difficult for flames to enter the collection cavity 334 connected to the connecting channel 351, ensuring that the collection cavity 334 can perform normal and stable collection of the emissions and reducing the possibility of leakage of harmful gases. Therefore, the structural design of the battery device 100 in this application not only suppresses the spread of thermal runaway fire but also reliably collects the emitted harmful gases, reducing the impact on the surrounding environment and personnel, thereby improving the reliability of the battery device 100.

[0109] Please refer to the reference. Figures 3 to 11 The connecting channel 351 includes a channel body 352 and a connecting hole 360, the connecting hole 360 ​​being connected to the first accommodating cavity 31; the channel body 352 is connected to the connecting hole 360 ​​and the collecting cavity 334, and at least a portion of the flame extinguishing structure 50 is fixedly disposed within the channel body 352.

[0110] The channel body 352 can serve as the main part of the connecting channel 351, and its internal space can be larger than the internal space of the connecting hole 360. The connecting hole 360 ​​can be used to communicate with the first accommodating cavity 31 to allow the discharge discharged by the pressure relief mechanism 11 to enter. The connecting hole 360 ​​can be correspondingly connected to the pressure relief mechanism 11 of the battery cell 10, or it can be offset from the battery cell 10. Furthermore, at least a portion of the flame extinguishing structure 50 is fixedly disposed within the channel body 352. This means that the flame extinguishing structure 50 can be disposed only within the channel body 352, or it can be disposed in other locations besides the flame extinguishing structure 50 disposed within the channel body 352, such as the connecting hole 360, the first accommodating cavity 31, or the collecting cavity 334.

[0111] In this embodiment, at least a portion of the flame suppression structure 50 is disposed within the channel body 352, which has a relatively large space, thus allowing for the convenient placement of more flame suppression structures 50 to improve the suppression and elimination effect on flames entrained in the emissions.

[0112] Please refer to Figure 4 , Figure 10 as well as Figure 11 In one embodiment of this application, the connecting hole 360 ​​is connected to the pressure relief mechanism 11 of the battery cell 10.

[0113] In this embodiment, the connecting hole 360 ​​is set to correspond with the pressure relief mechanism 11, so that the connecting channel 351 and the pressure relief mechanism 11 are relatively close, which makes it convenient for the emissions discharged by the pressure relief mechanism 11 to enter the connecting channel 351 in a timely manner and be flame-retarded by the flame-extinguishing structure 50, thereby reducing the impact of the emissions on the surrounding battery cells 10 or other structures.

[0114] Please refer to the reference. Figures 3 to 6 ,as well as Figure 10 and Figure 11 In one embodiment of this application, the flame extinguishing structure 50 includes a first part 51 and a second part 53. The first part 51 is provided in the channel body 352; the second part 53 is correspondingly provided with the connecting hole 360 ​​to seal the connecting hole 360.

[0115] The first part 51 can be disposed only within the channel body 352, or it can be further disposed within the collection cavity 334. The second part 53 is configured as a sealing communication hole 360, meaning that the second part 53 can block the communication between the communication hole 360 ​​and the first accommodating cavity 31. This includes cases where the second part 53 is partially or entirely embedded in the communication hole 360, and cases where the second part 53 is located outside the communication hole 360, i.e., within the first accommodating cavity 31, and covers the communication hole 360. This application does not limit the placement of the second part 53, as long as it can effectively block the communication hole 360 ​​and the first accommodating cavity 31. In addition, the flame retardant methods of the first part 51 and the second part 53 can be set to be the same, for example, both using chemical flame retardant methods as described above. In this case, the structural types of the first part 51 and the second part 53 can be set to be the same, both including chemical flame retardants. Of course, the flame retardant methods of Part 51 and Part 53 can be different, for example, one can use a chemical flame retardant method and the other can use a physical flame retardant method. The structural types of Part 51 and Part 53 can also be different, with one including a chemical flame retardant and the other including a stainless steel corrugated strip or a sintered metal mesh.

[0116] In this embodiment, the first part 51 and the second part 53 of the flame-extinguishing structure 50 are respectively disposed in the channel body 352 and the sealing communication hole 360. This allows the thermal runaway emissions from a battery cell 10 to undergo initial flame retardation through the second part 53 at the communication hole 360 ​​after being discharged. Then, after entering the channel body 352, they can be further flame-retarded through the first part 51, achieving a dual flame-retardant mechanism that improves the suppression and elimination effect of the flame. Simultaneously, the second part 53 at other communication holes 360 can also block the flame within the communication channel 351 and / or collection chamber 334, reducing the possibility of flames from the communication channel 351 and / or collection chamber 334 erupting from other communication holes 360 and affecting other battery cells 10. For example, if the communication channel 351, as described below, includes multiple communication holes 360, and the number of second parts 53 can also be multiple, each second part 53 can seal one communication hole 360 ​​to reduce the possibility of flames from the channel body 352 erupting from other communication holes 360. In this way, a dual suppression and elimination mechanism for flames mixed in with emissions is achieved, and a barrier mechanism is provided for the thermal runaway effects between adjacent battery cells 10, which helps to further improve the suppression effect of thermal runaway propagation and improve the reliability of the battery device 100.

[0117] Please refer to Figure 4 , Figure 10 as well as Figure 11 In one embodiment of this application, the second part 53 is disposed on the outside of the connecting hole 360 ​​and is located on the side of the connecting hole 360 ​​that connects to the first accommodating cavity 31.

[0118] In this embodiment, the second part 53 is located on the outside of the connecting hole 360, and the space on the outside is relatively large, which makes it easy to arrange.

[0119] Please refer to Figure 4 , Figure 10 as well as Figure 11 In one embodiment of this application, the connecting hole 360 ​​is connected to the pressure relief mechanism 11 of the battery cell 10, and the second part 53 is disposed between the pressure relief mechanism 11 and the connecting hole 360.

[0120] In this embodiment, the second part 53 can be conveniently clamped and limited by the portion where the pressure relief mechanism 11 and the battery box 30 form a communication hole 360, thereby improving the convenience and stability of the installation of the second part 53. In addition, the distance between the second part 53 and the pressure relief mechanism 11 can be shortened so that the second part 53 can play a flame-retardant role in a timely manner when the pressure relief mechanism 11 discharges emissions.

[0121] Please refer to Figure 4In one embodiment of this application, the pressure relief mechanism 11 is disposed on one side of the battery cell 10 in the first direction Z. On the projection plane perpendicular to the first direction Z, the projected area of ​​the pressure relief mechanism 11 is S1, the projected area of ​​the connecting hole 360 ​​is S2, and the projected area of ​​the second part 53 is S3, satisfying the relationship: S1≤S2<S3.

[0122] When the battery device 100 is in normal installation and use, the first direction Z can be vertical. Of course, in other embodiments, the first direction Z can also be horizontal or other directions, and this application does not limit the specific type of the first direction Z.

[0123] In this embodiment, the projected area S1 of the pressure relief mechanism 11 and the projected area S2 of the connecting hole 360 ​​are set to a relationship of S1≤S2, so that the discharge from the pressure relief mechanism 11 can accurately enter the connecting hole 360. Furthermore, setting the projected area S2 of the inlet and the projected area S3 of the second part 53 to a relationship of S2<S3 can improve the sealing effect of the second part 53 on the connecting hole 360, so as to further improve the barrier effect against thermal runaway between adjacent battery cells 10.

[0124] Additionally, it should be noted that the pressure relief mechanism 11 may not be located on the first direction Z side of the battery cell 10, but may be located in other directions, such as the second direction X side as described below, or the third direction Y side.

[0125] Please refer to the reference. Figures 3 to 11 In one embodiment of this application, the communication channel 351 includes a plurality of communication holes 360, each communication hole 360 ​​being connected to a pressure relief mechanism 11 of a battery cell 10, and the channel body 352 being connected to the plurality of communication holes 360.

[0126] A channel body 352 can communicate with multiple connecting holes 360, so that discharges entering the multiple connecting holes 360 can enter the collection chamber 334 through the channel body 352. Alternatively, all battery cells 10 can share a single connecting channel 351. For example, when multiple battery cells 10 are configured into a battery pack 10A as described above, the number of connecting channels 351 can be set according to the number of battery packs 10A, so that multiple battery cells 10 in each battery pack 10A share a single connecting channel 351.

[0127] In this embodiment, the connecting channel 351 is configured to include a channel body 352 and multiple connecting holes 360, so that multiple battery cells 10 can share a single connecting channel 351, thereby reducing the number of connecting channels 351 required and simplifying the structural configuration of the battery device 100.

[0128] In addition, in some embodiments, when the flame extinguishing structure 50 includes a first part 51 and a second part 53 as described above, the number of second parts 53 can be set to multiple. Each second part 53 can seal a corresponding connecting hole 360 ​​so that after a certain battery cell 10 experiences thermal runaway and the emissions enter the channel body 352 through the corresponding connecting hole 360, the second part 53 at other connecting holes 360 can block the flame located in the channel body 352, reducing the possibility that it will be ejected from other connecting holes 360 and affect other battery cells 10.

[0129] Furthermore, it should be noted that in other embodiments, each connecting channel 351 may also have only one connecting hole 360. In this case, the connecting hole 360 ​​may be offset from the battery cell 10, so that the exhaust material discharged by the pressure relief mechanism 11 of any battery cell 10 in the first accommodating cavity 31 can enter the first accommodating cavity 31 and then enter the connecting hole 360 ​​of the connecting channel 351, so that multiple battery cells 10 can still share a single connecting channel 351. Of course, the number of connecting channels 351 may also be configured in a one-to-one correspondence with the battery cells 10, so that each battery cell 10 uses a corresponding connecting channel 351. In this case, different battery cells 10 can use their respective connecting channels 351 individually, so that when there is a flame in the connecting channel 351 corresponding to a certain battery cell 10, the impact of the flame in that connecting channel 351 on other battery cells 10 can be reduced.

[0130] In addition, in some embodiments, the flame extinguishing structure 50 may be disposed only within the connecting hole 360.

[0131] Please refer to the reference. Figures 3 to 11 In one embodiment of this application, the channel body 352 includes a first channel 353 and a second channel 361. The first channel 353 is connected to the connecting hole 360 ​​and is located on one side of the battery cell 10 in the first direction Z. The collection cavity 334 is located on the other side of the battery cell 10 in the first direction Z. The second channel 361 extends along the first direction Z and is connected to the collection cavity 334. At least the first channel 353 in the channel body 352 is provided with a flame extinguishing structure 50.

[0132] When a pressure relief mechanism 11 is provided on one side of the battery cell 10 in the first direction Z, the first channel 353 and the connecting hole 360 ​​can be located on the side of the battery cell 10 with the pressure relief mechanism 11, while the collection chamber 334 can be located on the side of the battery cell 10 facing away from the pressure relief mechanism 11. For example, when the first direction Z is vertical as described above, the pressure relief mechanism 11 can be located on the lower side of the battery cell 10, the connecting hole 360 ​​can be located on the lower side of the battery cell 10, the second channel 361 can be located horizontally on the lower side of the battery cell 10, and the collection chamber 334 can be located on the upper side of the battery cell 10. In this case, since the emitted material is mainly gas, it has an upward floating tendency, and can thus enter the collection chamber 334 more smoothly in the connecting channel 351. Of course, in other embodiments, the collection chamber 334 and the first channel 353 can also be located on the lower and upper sides of the battery cell 10, respectively. In addition, the flame extinguishing structure 50 is provided in at least the first channel 353 in the channel body 352. This means that the first part 51 of the flame extinguishing structure 50 can be provided only in the first channel 353 in the channel body 352, or the first part 51 of the flame extinguishing structure 50 can be provided in both the first channel 353 and the second channel 361.

[0133] In this embodiment, the first channel 353 and the collection chamber 334 in the channel body 352 are respectively arranged on both sides of the battery cell 10 in the first direction Z. This allows for better utilization of the space on each side of the battery cell 10, making the connecting channel 351, the collection chamber 334, and the battery cell 10 more compactly distributed, thereby reducing the overall volume of the battery device 100. Simultaneously, this also extends the length of the connecting channel 351, thus extending the flow path of the emissions, providing more space for depressurization and more time for cooling, thereby improving the depressurization and cooling effect of the emissions. Furthermore, at least the first channel 353 in the channel body 352 is provided with a flame-extinguishing structure 50, which can be located upstream in the flow path of the emissions to promptly retard the emissions, thereby improving the suppression effect on the spread of thermal runaway fire.

[0134] Furthermore, when flame-extinguishing structures 50 are provided in both the first channel 353 and the second channel 361, more flame-extinguishing structures 50 can be arranged due to the relatively long length of the connecting channel 351, further improving the flame-retardant effect on the flames in the emissions.

[0135] Of course, it should be noted that in other embodiments, the collection cavity 334 may also be located on adjacent sides of the first channel 353. For example, the collection cavity 334 may also be located on one side of the battery cell 10 in the horizontal direction, and the second channel 361 may extend vertically to communicate with the collection cavity 334.

[0136] That is, by placing the first channel 353 and the collection chamber 334 on different sides of the battery cell 10, including adjacent sides or opposite sides, the space on each side can be better utilized to improve the compactness of the structure distribution, thereby reducing the overall volume of the battery device 100. At the same time, the flow path of the emissions can be extended by extending the length of the connecting channel 351 as described above.

[0137] Furthermore, it should be noted that in some embodiments, the channel body 352 may only include the first channel 353. In this case, the collection cavity 334 may be directly connected to the first channel 353 and may be arranged on the same side of the battery cell 10, including horizontal and vertical arrangement; or, the collection cavity 334 and the first channel 353 may be arranged on adjacent sides of the battery cell 10.

[0138] Furthermore, it should be noted that when the first channel 353 and the connecting hole 360 ​​are located on one side of the battery cell 10 in the first direction Z, the pressure relief mechanism 11 can also be located on the other side of the battery cell 10 in the first direction Z, or on other sides of the battery cell 10. That is, the pressure relief mechanism 11 and the first channel 353 and the connecting hole 360 ​​can be located on the same side of the battery cell 10, or they can be located on different sides. This application does not limit the relative position of the pressure relief mechanism 11 and the first channel 353 and the connecting hole 360.

[0139] Please refer to Figure 6 , Figure 10 as well as Figure 11 In one embodiment of this application, both the first channel 353 and the second channel 361 are provided with flame extinguishing structures 50.

[0140] In this embodiment, a flame-extinguishing structure 50 is provided in both the first channel 353 and the second channel 361, namely the first part 51 of the flame-extinguishing structure 50 described above. This allows the flame-extinguishing structure 50 to suppress and eliminate the flames along the entire flow path of the emissions in the main body of the channel 352, thereby further improving the effect of suppressing the spread of thermal runaway.

[0141] Please refer to Figure 4 , Figure 10 as well as Figure 11 In one embodiment of this application, a guide member 354 is provided in the first channel 353, and the projection of the guide member 354 is misaligned with the projection of the connecting hole 360 ​​on the projection plane perpendicular to the first direction Z.

[0142] The guide element 354 can be used to guide the emitted material, causing it to flow along a preset path to the second channel 361. The guide element 354 can be a strip structure, a protruding column structure, or a plate structure; this application does not limit the structural type of the guide element 354. The projection of the guide element 354 is offset from the projection of the connecting hole 360, with the projection of the guide element 354 located outside the projection of the connecting hole 360.

[0143] In this embodiment, the guide member 354 guides the emissions entering the first channel 353, directing them to flow orderly into the second channel 361 so that the collection chamber 334 can accurately collect them. Simultaneously, the guide member 354 extends the flow path of the emissions, thereby increasing the contact time between the emissions and the flame-extinguishing structure 50 located in the first channel 353, allowing the flame-extinguishing structure 50 to more effectively suppress and eliminate flames trapped within the emissions.

[0144] Please refer to Figure 11 In one embodiment of this application, the two walls of the guide member 354 on both sides in the first direction Z are connected to the channel wall of the first channel 353, and the remaining walls of the guide member 354 are spaced apart from the channel wall of the first channel 353.

[0145] When the first direction Z is vertical as described above, the two side walls of the guide member 354 in the first direction Z are the top and bottom surfaces of the guide member 354; the remaining walls of the guide member 354 are the side circumferential surfaces of the guide member 354.

[0146] In this embodiment, the top and bottom surfaces of the guide member 354 are connected to the channel wall, allowing the exhaust material to fully contact the side surfaces of the guide member 354, thereby improving the guiding effect of the guide member 354 on the exhaust material. By spacing the side surfaces of the guide member 354 from the channel wall, the flow path of the exhaust material is enriched, allowing it to disperse and make more thorough contact with the flame suppressor structure 50, thus further improving the flame suppression effect of the flame suppressor structure 50 on flames trapped within the exhaust material.

[0147] Of course, it should be noted that in other embodiments, one of the top surface and bottom surface of the flow guide 354 may be spaced apart from the channel wall, and a portion of the side peripheral surface of the flow guide 354 may be connected to the channel wall.

[0148] Please refer to Figure 11 In one embodiment of this application, there are multiple flow guides 354, which divide the first channel 353 into multiple sub-channels 370, and at least some of the sub-channels 370 are cross-connected.

[0149] At least some of the sub-channels 370 are interconnected, meaning that adjacent sub-channels 370 can be connected at least at one end in the extension direction of the sub-channels 370. The multiple sub-channels 370 can be formed by enclosing multiple first guide members 355 spaced side-by-side along the second direction X, as described below, and the channel walls of the first channel 353. Alternatively, multiple guide members 354 can be arranged in a spiral shape on a projection plane perpendicular to the first direction Z, so that the spiral first channel 353 is formed by enclosing the guide members 354 and the channel walls of the first channel 353.

[0150] In this embodiment, the first channel 353 is divided into multiple interconnected sub-channels 370 by multiple guide members 354, which makes the path of the sub-channels 370 more diversified, improves the effect of the emissions being dispersed and contacting the flame suppression structure 50, and further improves the flame suppression structure 50's effect on suppressing and eliminating flames mixed in with the emissions.

[0151] Please refer to the reference. Figure 10 and Figure 11 In one embodiment of this application, the first channel 353 is provided with a second channel 361 on at least one side of the second direction X, and the second direction X intersects with the first direction Z; the plurality of guide members 354 include a first guide member 355, and the plurality of first guide members 355 are arranged side by side at intervals along the second direction X, and the extension direction of the first guide member 355 intersects with the second direction X but is not perpendicular to it.

[0152] When the first direction Z is vertical as described above, the second direction X can be horizontal. The first channel 353 having a second channel 361 on at least one side in the second direction X means that a connecting channel 351 can have a second channel 361 on one side of the first channel 353 in the second direction X, or it can have a second channel 361 on both sides of the first channel 353 in the second direction X. The extension direction of the first guide member 355 intersects the second direction X but is not perpendicular to it, meaning that the first guide member 355 can be a strip-shaped structure whose length direction intersects the second direction X, but forms a 90° angle.

[0153] In this embodiment, two adjacent first guide members 355 can be provided with a sub-channel 70a1. The length direction of the first guide member 355 intersects with the second direction X but is not perpendicular to it, so that the side peripheral surfaces of the first guide member 355 on both sides of the second direction X can guide the discharge, so that the discharge can flow accurately to the second channel 361 located on at least one side of the first channel 353 in the second direction X.

[0154] Please refer to the reference. Figure 4 , Figure 10 as well as Figure 11In one embodiment of this application, a plurality of connecting holes 360 are arranged at intervals along the second direction X, and each first guide member 355 is located between two adjacent connecting holes 360.

[0155] In this embodiment, the connecting hole 360 ​​corresponds to the sub-channel 70a1 formed by the two adjacent first guide members 355, so that the discharge entering through the connecting hole 360 ​​can directly enter between the adjacent first guide members 355, and thus be easily guided by the first guide members 355. At the same time, this arrangement also allows the space between the two adjacent first guide members 355 to be used to avoid the connecting hole 360, so that there is no need to use other spaces within the first channel 353 for corresponding avoidance, thereby reducing the volume of the first channel 353 and reducing the space occupied.

[0156] Of course, it should be noted that in other embodiments, the connecting hole 360 ​​may be configured to correspond to the interval between the first guide member 355 and the channel wall of the first channel 353 in its length direction.

[0157] Please refer to Figure 11 In one embodiment of this application, a plurality of first guide members 355 arranged at intervals along the second direction X form a first guide member group 356, and the plurality of guide members 354 include at least two first guide member groups 356; the at least two first guide member groups 356 are arranged side by side at intervals along the third direction Y, and the first direction Z, the second direction X and the third direction Y intersect each other.

[0158] When the first direction Z and the second direction X are, as described above, vertical and horizontal respectively, the third direction Y can be another horizontal direction.

[0159] In this embodiment, two first flow guide groups 356 are arranged in the third direction Y within the first channel 353, such that a row of battery cells 10 is arranged above each first flow guide group 356, thereby enabling more battery cells 10 to share a single connecting channel 351, so as to reduce the number of connecting channels 351 required and simplify the structural arrangement of the battery device 100.

[0160] Please refer to Figure 11 In one embodiment of this application, the plurality of guide members 354 further includes a second guide member 357, which extends along the second direction X; a second guide member 357 is provided between two adjacent first guide member groups 356, and the second guide member 357 is spaced apart from the first guide member group 356.

[0161] In this embodiment, a second guide 357 is provided on two adjacent first guide groups 356. The second guide 357 can block and guide the discharge, improve the orderliness of the discharge flow in the first channel 353, so that it can flow accurately to the second channel 361.

[0162] Please refer to Figure 11 In one embodiment of this application, the second guide member 357 is provided with a first guide surface 358, and the channel wall of the first channel 353 is provided with a second guide surface 359; in the two first guide members 355 located at both ends of the first guide member group 356, the first guide surface 358 is arranged relatively spaced from one first guide member 355, and the second guide surface 359 is arranged relatively spaced from the other first guide member 355.

[0163] The two first guide members 355 located at both ends of the first guide member assembly 356 refer to one first guide member 355 located at the very end on one side in the second direction X, and the other first guide member 355 located at the very end on the other side in the second direction X. Of these two first guide members 355, one is disposed opposite to the first guide surface 358 to form a sub-channel 370, and the other is disposed opposite to the second guide surface 359 to form a sub-channel 370. Furthermore, the first guide surface 358 can be a concave arc surface, or it can be a plane intersecting the second direction X but not perpendicular to it. Similarly, the second guide surface 359 can be a concave arc surface, or it can be a plane intersecting the second direction X but not perpendicular to it.

[0164] In this embodiment, the arrangement of the first guide surface 358 and the second guide surface 359 allows sub-channels 70a1 to still be formed at both ends of the first guide assembly 356 in the second direction X, so as to improve the guiding effect on the emissions.

[0165] Please refer to the reference. Figure 10 and Figure 11 In one embodiment of this application, the number of second channels 361 is at least two, wherein the two second channels 361 are respectively disposed on both sides of the first channel 353 in the second direction X, and respectively located on both sides of the first channel 353 in the third direction Y, and the first direction Z, the second direction X and the third direction Y intersect each other.

[0166] The two second channels 361 are respectively located on both sides of the first channel 353 in the second direction X, and on both sides of the first channel 353 in the third direction Y. This means that the two second channels 361 can be arranged diagonally. In this case, when the number of second channels 361 is greater than two, the remaining second channels 361 can be arranged in other positions, without limitation.

[0167] In this embodiment, by setting two diagonally arranged second channels 361, each position in the first channel 353 can be relatively close to one of the second channels 361, which helps to improve the uniformity of the overall flow path of the first channel 353, so as to accurately collect the emissions at different positions in the first channel 353.

[0168] Please refer to the reference. Figures 3 to 11 In one embodiment of this application, the battery box 30 includes a box body 33 and a channel shell 35. The box body 33 is provided with an installation cavity 331 and a collection cavity 334 arranged along a first direction Z. The box body 33 has a first isolation wall 335 located between the installation cavity 331 and the collection cavity 334. At least a portion of the installation cavity 331 is formed as a first receiving cavity 31. The channel shell 35 includes a plate-shaped portion 362 and a convex cylindrical portion 367. The plate-shaped portion 362 is provided on the side of the battery cell 10 facing away from the collection cavity 334. The plate-shaped portion 362 is provided with a connecting hole 360 ​​and a first channel 353. The convex cylindrical portion 367 extends along the first direction Z and is provided with a second channel 361.

[0169] At least a portion of the mounting cavity 331 is formed as the first receiving cavity 31, meaning that the mounting cavity 331 can be entirely formed as the first receiving cavity 31, in which case the channel shell 35 can be disposed on the outside of the box body 33; the mounting cavity 331 can also be partially formed as the first receiving cavity 31, in which case the channel shell 35 can be disposed within the mounting cavity 331 of the box body 33, so as to partially enclose the mounting cavity 331 to form the first receiving cavity 31. Furthermore, the box body 33 can be, as described below, a first box body 332 and a second box body 333 arranged along the first direction Z. Of course, in other embodiments, the box body 33 can also be divided into two parts or more parts along the second direction X. The plate-shaped portion 362 can be flat so that it can be stacked on the lower or upper side of the battery cell 10, and the protruding cylindrical portion 367 can protrude from the side of the plate-shaped portion 362 facing the battery cell 10.

[0170] In this embodiment, the mounting cavity 331, the collecting cavity 334, and the connecting channel 35 are formed by the box body 33 and the channel shell 35, respectively, so that the mounting cavity 331, the collecting cavity 334, and the connecting channel 351 can be processed and formed separately and independently, reducing the complexity of processing and forming, and thus improving the convenience of processing and manufacturing the battery device 100.

[0171] Please refer to the reference. Figures 3 to 9In one embodiment of this application, the plate-shaped portion 362 and the protruding cylindrical portion 367 are disposed in the mounting cavity 331. The outer sides of the plate-shaped portion 362 and the protruding cylindrical portion 367 partially enclose the mounting cavity 331 to form a first receiving cavity 31. One end of the protruding cylindrical portion 367 away from the plate-shaped portion 362 passes through the first isolation wall 335. Alternatively, the first isolation wall 335 is provided with a first hole communicating with the end of the protruding cylindrical portion 367 away from the plate-shaped portion 362, so that the second channel 361 in the protruding cylindrical portion 367 can communicate with the collection cavity 334.

[0172] In this embodiment, both the plate-shaped portion 362 and the protruding cylindrical portion 367 are disposed within the mounting cavity 331, allowing them to be located within the housing body 33, thereby improving the compactness of the distribution among the various mechanisms of the battery device 100. Simultaneously, the housing body 33 also provides isolation and protection for the plate-shaped portion 362 and the protruding cylindrical portion 367. Furthermore, a structural foundation is provided to facilitate the establishment of a heat exchange relationship between the channel shell 35 and the heat exchange mechanism 70 in the battery device 100 that originally exchanges heat with the individual battery cells 10, as described below.

[0173] Please refer to the reference. Figure 10 and Figure 11 In one embodiment of this application, the plate-shaped portion 362 includes a plate body 363 and a cover plate 365. The plate body 363 is provided with a receiving groove 364. The cover plate 365 covers the opening of the receiving groove 364 and forms a first channel 353 with the receiving groove 364. A connecting hole 360 ​​is provided in the cover plate 365. The cover plate 365 may also be provided with a through hole 366 to communicate with the end of the convex cylindrical portion 367 away from the collection cavity 334, or to allow the end of the convex cylindrical portion 367 away from the collection cavity 334 to pass through, so that the second channel 361 in the convex cylindrical portion 367 can communicate with the first channel 353.

[0174] In this embodiment, the plate-shaped portion 362 is configured to include a plate body 363 and a cover plate 365, allowing them to be manufactured separately and then assembled together to form the first channel 353. At this time, the structures of the separated plate body 363 and cover plate 365 are relatively simple, which improves the ease of processing and shaping the first channel 353. Furthermore, when a guide member 354 is provided in the first channel 353 as described above, the guide member 354 can be disposed within the receiving groove 364. The first guide surface 358 and the second guide surface 359 can also be disposed on the groove wall of the receiving groove 364.

[0175] Please refer to the reference. Figure 2 , Figure 5 as well as Figure 6In one embodiment of this application, the battery box 30 includes a first box body 332 and a second box body 333. One end of the first box body 332 is open. The second box body 333 is provided with a collection cavity 334 and covers the opening of the first box body 332. The second box body 333 and the first box body 332 enclose each other to form an installation cavity 331. The second box body 333 has a first isolation wall 335.

[0176] The first isolation wall 335 can be used to isolate the collection chamber 334 from the installation chamber 331, so that the emissions collected in the collection chamber 334 will not enter the installation chamber 331. In addition, the second housing 333 and the first housing 332 can be detachably connected as described below, or they can be non-detachably connected by adhesive or welding.

[0177] In this embodiment, the battery box 30 is divided into a first box 332 and a second box 333, allowing them to be manufactured independently and then assembled together to form the mounting cavity 331. The separate structures of the first box 332 and the second box 333 are relatively simple, which facilitates the processing and shaping of the mounting cavity 331. Simultaneously, by placing the collection cavity 334 separately within the second box 333, the collection cavity 334 is not affected by the connection interface between the second box 333 and the first box 332, thereby improving the sealing performance of the collection cavity 334 and enhancing the reliability of its waste collection.

[0178] In one embodiment of this application, the second housing 333 is detachably connected to the first housing 332.

[0179] A detachable connection refers to the ability to separate two connected objects by breaking the connection structure. The detachable connection between the second housing 333 and the first housing 332 can be achieved through screws, snap-fit ​​connections, or magnetic connections, etc. This application does not specify a particular connection method.

[0180] In this embodiment, the second housing 333 is detachably installed, so that when the battery device 100 is processed later, the second housing 333 that collects harmful gases can be disassembled and replaced, and the battery cells 10 that have experienced thermal runaway can be replaced at the same time, so that the battery device 100 can be reused, thereby improving the environmental friendliness of the battery device 100.

[0181] Please refer to the reference. Figures 7 to 9 ,as well as Figures 12 to 15In one embodiment of this application, the battery device 100 further includes a heat exchange mechanism 70, which is provided with a medium flow channel 70a. The heat exchange mechanism 70 is disposed in the first accommodating cavity 31 and configured to be heat-exchange connected with the battery cell 10 and heat-exchange connected with the outer side of the channel wall of at least one of the first channel 353 and the second channel 361.

[0182] The heat exchange mechanism 70, through the medium flow channel 70a, can be used to supply heat exchange media such as water or oil. After heat exchange with the battery cell 10 and with the channel wall of at least one of the first channel 353 and the second channel 361, the heat from the battery cell 10 and the heat from the internal emissions within at least one of the first channel 353 and the second channel 361 can be removed, thereby achieving a cooling effect on the battery cell 10 and the emissions. The heat exchange connection proposed in this application refers to the connection between two entities that can exchange heat, including direct contact and indirect heat exchange with air or other objects between them. Therefore, the heat exchange mechanism 70 and the battery cell 10 can be in contact or spaced apart, and a layer, pad, or membrane can be further provided between them. Similarly, the heat exchange mechanism 70 and the outer side of the channel wall of the channel body 352 can be in contact or spaced apart, and an adhesive layer, pad or membrane or other object can be provided between them.

[0183] Alternatively, the heat exchange mechanism 70 can be a second accommodating cavity 70b, as described below, which accommodates the battery cell 10, to achieve cavity-enclosed heat exchange for the battery cell 10. Of course, the heat exchange mechanism 70 can also be a liquid cooling plate structure to achieve side-contact heat exchange for the battery cell 10. This application does not limit the structural type of the heat exchange mechanism 70.

[0184] Furthermore, the heat exchange mechanism 70 can be connected to the outer side of the channel wall of the channel body 352 through a heat exchange connection with one of the first channel 353 and the second channel 361, or it can be connected to both of the first channel 353 and the second channel 361.

[0185] When the heat exchange mechanism 70 has a heat exchange connection with the outer side of the channel wall of the first channel 353, and the first channel 353 is formed from the inner side of the plate-shaped portion 362 in the channel shell 35 described above, the outer side of the channel wall of the first channel 353 refers to the outer side of the plate-shaped portion 362. In this case, the heat exchange mechanism 70 can be heat exchanged with the outer side of the plate-shaped portion 362. Of course, when a connecting channel 351 is provided in the box wall of the box body 33 as described above, the box body 33 can have a bottom wall and a side wall to respectively provide the first channel 353 and the second channel 361. In this case, the heat exchange mechanism 70 can have a heat exchange connection with the bottom wall. In the case where the heat exchange mechanism 70, as described above, is provided with a second accommodating cavity 70b for cavity-encapsulated heat exchange of the battery cell 10, the heat exchange mechanism 70 can be stacked along the first direction Z on the plate-shaped portion 362 provided with the second channel 361 or the bottom wall of the casing, so that the heat exchange mechanism 70 can be heat-exchange connected with the plate-shaped portion 362 provided with the second channel 361 or the bottom wall of the casing on one side in the first direction Z. When the heat exchange mechanism 70 is a liquid cooling plate as described above, the liquid cooling plate can be at least partially horizontally arranged (including being entirely horizontally plate-shaped, and also including the L-shaped structure described below), so that the horizontal part of the liquid cooling plate can be heat-exchange connected with the plate-shaped portion 362 provided with the second channel 361 or the bottom wall of the casing.

[0186] When the heat exchange mechanism 70 has a heat exchange connection with the outer side of the channel wall of the second channel 361, and the second channel 361 can be formed from the inner side of the protruding cylindrical portion 367 in the channel shell 35 described above, the outer side of the channel wall of the second channel 361 refers to the outer side of the protruding cylindrical portion 367. In this case, the heat exchange mechanism 70 can have a heat exchange connection with the outer side of the protruding cylindrical portion 367. Of course, when the second channel 361 is provided in the side wall of the box body 33 as described above, with a connecting channel 351, the heat exchange mechanism 70 can have a heat exchange connection with the side wall of the box. Wherein, when the heat exchange mechanism 70 is provided with a second accommodating cavity 70b as described above for cavity-encapsulated heat exchange of the battery cell 10, the heat exchange mechanism 70 can be heat-connected to the protruding cylindrical portion 367 with the second channel 361 or the side wall of the box by at least a portion of the side circumferential surface surrounding the first direction Z. When the heat exchange mechanism 70 is a liquid cooling plate as described above, it can be configured in an L-shape so that the vertical portion of the liquid cooling plate is connected to the protruding cylindrical portion 367 with the second channel 361 or the side wall of the casing for heat exchange. Alternatively, the liquid cooling plate can still be configured as a vertically arranged flat plate and stacked between the battery cell 10 and the protruding cylindrical portion 367 with the second channel 361 or the side wall of the casing.

[0187] In this embodiment, the heat exchange mechanism 70 is configured to have heat exchange relationships with both the outer side of the channel wall of the battery cell 10 and the channel body 352. This allows the heat exchange mechanism 70 to not only exchange heat with the battery cell 10, but also to further cool down the exhaust flowing through the channel body 352, reducing the possibility of secondary fires caused by excessively high temperatures in the exhaust, thereby further improving the reliability of the battery device 100.

[0188] Please refer to the reference. Figure 3 , Figure 4 , Figure 8 , Figure 9 , Figure 12 , Figure 14 as well as Figure 15 In one embodiment of this application, the heat exchange mechanism 70 is provided with a second accommodating cavity 70b, and a medium flow channel 70a is provided on the outside of the second accommodating cavity 70b and surrounds the second accommodating cavity 70b. The heat exchange mechanism 70 has a second isolation wall 711 located between the second accommodating cavity 70b and the medium flow channel 70a. The battery cell 10 is disposed in the second accommodating cavity 70b, and the second isolation wall 711 is heat-exchange connected to the battery cell 10. The heat exchange mechanism 70 is provided with a second hole 731 at the position corresponding to the pressure relief mechanism 11 of the battery cell 10, and the second hole 731 communicates with the second accommodating cavity 70b.

[0189] The second accommodating cavity 70b can be used to accommodate the battery cell 10. Therefore, the shape of the second accommodating cavity 70b can be adapted to the shape of the battery cell 10. For example, when the battery cell 10 is cylindrical, the second accommodating cavity 70b can also be cylindrical. When the battery cell 10 is cuboid, the second accommodating cavity 70b can also be cuboid. The second isolation wall 711 can be used to isolate the second accommodating cavity 70b from the medium flow channel 70a, so that the heat exchange medium in the medium flow channel 70a will not enter the second accommodating cavity 70b. The medium flow channel 70a can surround the second accommodating cavity 70b by half a circle, or by one-third, two-thirds, or three-quarters of a circle, or even by a full circle. This application does not limit the circumferential coverage of the medium flow channel 70a around the second accommodating cavity 70b. Furthermore, the medium flow channel 70a can be continuously arranged around the second accommodating cavity 70b or intermittently arranged for heat exchange. Additionally, to facilitate the formation of the second accommodating cavity 70b and the medium flow channel 70a surrounding it, the heat exchange mechanism 70 can be a structure including an inner frame 71 and an outer structure 80, as described below. Of course, the heat exchange mechanism 70 can also be divided into two or more separate parts along the first direction Z. The second orifice 731 can be used to expose the pressure relief mechanism 11 so that the discharge from the pressure relief mechanism 11 can enter the connecting hole 360 ​​of the connecting channel 351. Therefore, the second orifice 731, the pressure relief mechanism 11, and the connecting hole 360 ​​can be arranged correspondingly along the first direction Z.

[0190] In this embodiment, the second accommodating cavity 70b can accommodate the battery cell 10, enabling the heat exchange mechanism 70 to perform cavity-enclosed heat exchange on the battery cell 10. This increases the heat exchange area between the heat exchange mechanism 70 and the battery cell 10, thereby improving the heat exchange efficiency. Furthermore, it reduces the possibility of large temperature differences at different locations in the battery cell 10 due to localized heat exchange, resulting in a more uniform temperature throughout the battery cell 10, thus improving its performance and lifespan.

[0191] Please refer to Figure 4 In one embodiment of this application, to improve the compactness of the structure, the pressure relief mechanism 11 can at least partially extend into the second hole 731. Additionally, the second part 53 of the flame extinguishing mechanism described above can also be disposed within the second hole 731, so that the positioning and limiting function of the second hole 731 can improve the accuracy and stability of the installation of the second part 53.

[0192] Please refer to the reference. Figures 12 to 19In one embodiment of this application, the heat exchange mechanism 70 includes an inner frame 71 and an outer structure 80. The inner frame 71 is open at least one end in the first direction Z. The inner side of the inner frame 71 is provided with a second accommodating cavity 70b and a second isolation wall 711. The outer structure 80 is located on the outside of the inner frame 71 and surrounds the outside of the inner frame 71 to form a medium flow channel 70a. The outer structure 80 is heat-exchange connected to the outer side of the channel wall of at least one of the first channel 353 and the second channel 361. The inner frame 71 or the outer structure 80 is provided with a second hole 731.

[0193] In the first direction Z, as described above, the direction is vertical. The inner frame 71 may have an opening on either its upper or lower side, or both its upper and lower sides may have openings. The outer structure 80 may wrap around the outer side of the inner frame 71 to form a medium flow channel 70a. The outer structure 80 may include an outer frame 72 and two cover plates 73, as described below. In this case, when a pressure relief mechanism 11 is provided on the lower side of the battery cell 10, if both the upper and lower sides of the inner frame 71 are open, or if the lower side of the inner frame 71 is open, one of the cover plates 73 in the outer structure 80 may be located below the inner frame 71 and the battery cell 10, and may have a second hole 731. When the upper side of the inner frame 71 is open, the second hole 731 may be partially provided on the inner frame 71 and partially provided on the cover plate 73 located below the battery cell 10.

[0194] Of course, the outer structure 80 can also be an annular shell, which includes an annular top wall and an annular bottom wall spaced apart from each other, and an annular intermediate wall connecting the outer edges of the annular top wall and the annular bottom wall, and the annular intermediate wall is arranged circumferentially around the annular top wall and the annular bottom wall. In this case, the entire annular shell is located on the periphery of the inner frame 71 and the battery cell 10, so the second hole 731 can be provided in the inner frame 71.

[0195] In this embodiment, the inner frame 71 and the outer structure 80 can be manufactured separately and independently. The inner frame 71 has a relatively simple structure, which facilitates the formation of the second accommodating cavity 70b on its inner side. At the same time, the medium flow channel 70a can also be formed by directly enclosing the inner frame 71 and the outer structure 80 after assembly, which is relatively simple in structure. This will help improve the convenience of processing and forming the second accommodating cavity 70b and the medium flow channel 70a.

[0196] Please refer to the reference. Figures 12 to 19In one embodiment of this application, the peripheral structure 80 includes an outer frame 72 and two cover plates 73. The inner frame 71 and the outer frame 72 are both open at both ends in the first direction Z. The outer frame 72 is spaced around the outer side of the inner frame 71. The two cover plates 73 respectively cover the two sides of the inner frame 71 and the outer frame 72 with openings. The outer side of the inner frame 71, the outer frame 72, and the two cover plates 73 enclose a medium flow channel 70a. The cover plate 73 opposite to the pressure relief mechanism 11 is provided with a second hole 731 and is heat-exchange connected to the outer side of the channel wall of the first channel 353.

[0197] When the first direction Z is vertical as described above, both the inner frame 71 and the outer frame 72 have openings on their upper and lower sides, and are nested together. Two cover plates 73 respectively cover the upper and lower sides of the inner frame 71 and the outer frame 72. Furthermore, when a pressure relief mechanism 11 is provided on the lower side of the battery cell 10, the plate-shaped portion 362 with the first channel 353 or the bottom wall of the casing is also provided on the lower side of the battery cell 10. In this case, the cover plate 73 on the lower side can be provided with a second hole 731 and located on the upper side of the plate-shaped portion 362 or the bottom wall of the casing for heat exchange connection with the plate-shaped portion 362 or the bottom wall of the casing.

[0198] In this embodiment, the peripheral structure 80 is further divided into an outer frame 72 and two cover plates 73, allowing each to be manufactured independently and then assembled together to form the medium flow channel 70a. The structures of the outer frame 72 and the two cover plates 73 are relatively simple, which facilitates the processing and shaping of the medium flow channel 70a. Furthermore, the cover plate 73 with the second hole 731 can be easily stacked with the outer side of the channel wall of the first channel 353, that is, stacked with the plate-shaped portion 362 or the bottom wall of the box where the first channel 353 is located, thereby improving the cooling effect on the discharge flowing through the first channel 353.

[0199] Please refer to Figure 18 In one embodiment of this application, another cover plate 73 opposite to the cover plate 73 provided with the second hole 731 may be provided with a third hole 735 so as to expose a portion of the battery cell 10 for electrical connection of adjacent battery cells 10 by means of busbar 13.

[0200] Please refer to Figure 17 In one embodiment of this application, the inner frame 71 includes a plurality of cylindrical portions 713 connected in sequence, and each cylindrical portion 713 is provided with a second accommodating cavity 70b.

[0201] Multiple cylindrical sections 713 can be integrally molded to improve the overall strength and sealing performance of the inner frame 71. The integrally molded structure proposed in this application refers to a structure formed through an integral molding process, such as injection molding, extrusion molding, or die casting. Alternatively, the multiple cylindrical sections 713 can be manufactured separately and then assembled together. Furthermore, the multiple cylindrical sections 713 can be arranged linearly along the second direction X as described below, or they can be arranged in an arc. This application does not limit the arrangement of the multiple cylindrical sections 713.

[0202] In this embodiment, the inner frame 71 is configured to include multiple cylindrical portions 713, such that each cylindrical portion 713 can accommodate one battery cell 10, enabling one heat exchange mechanism 70 to be used for multiple battery cells 10. This reduces the number of heat exchange mechanisms 70 required, simplifying the structural design and improving the ease of manufacturing the battery device 100.

[0203] Please refer to Figure 17 In one embodiment of this application, a plurality of cylindrical portions 713 in the inner frame 71 can be arranged along the second direction X, which intersects with the first direction Z, so as to improve the regularity of the structure of the inner frame 71, thereby facilitating the orderly arrangement of the battery cells 10 and improving the utilization rate of the space inside the battery box 30.

[0204] Please refer to the reference. Figures 14 to 17 ,as well as Figure 19 and Figure 20 In one embodiment of this application, the heat exchange mechanism 70 further includes at least one partition 75, which is disposed in the medium flow channel 70a and divides the medium flow channel 70a into at least two sub-flow channels 70a1 arranged along the first direction Z; the heat exchange mechanism 70 also includes two flow collectors 76, each flow collector 76 having a flow collecting cavity 761 and at least two flow branching channels 763, the at least two flow branching channels 763 being connected to the flow collecting cavity 761, and each sub-flow channel 70a1 being connected to one flow branching channel 763 of each of the two flow collectors 76.

[0205] The shape of the separator 75 can be the same as the projected shape of the medium flow channel 70a on a projection plane perpendicular to the first direction Z, or it can be said to be the same as the shape of the gap between the inner frame 71 and the outer frame 72. The number of separators 75 can be one, or two or more. When there are multiple separators 75, the separators 75 located at the very ends of the chain in the first direction Z can be formed as end separators 75A, and the remaining separators 75 are disposed between two end separators 75A to form intermediate separators 75B. In this case, sub-flow channels 70a1 can be formed at intervals between the end separators 75A and the corresponding cover plates 73. For example, when the first direction Z is vertical, sub-flow channels 70a1 can be formed at intervals between the upper end separator 75A and the upper cover plate 73. Of course, the end separator 75A and the corresponding cover plate 73 can also be fitted together without forming a sub-channel 70a1. For example, the end separator 75A located at the upper end can be fitted together with the cover plate 73 located at the upper end. The manifold 76 can be used to communicate with at least two sub-channels 70a1, such that each sub-channel 70a1 can be fed into the manifold 76 through a branch channel 763 and then discharged from the branch channel 763 of the other manifold 76.

[0206] In this embodiment, the media flow channel 70a can be divided into at least two sub-flow channels 70a1 by the separator 75, so that the heat exchange medium can be distributed into each sub-flow channel 70a1, reducing the possibility of the heat exchange medium accumulating on the lower side under gravity, thereby improving the flowability of the heat exchange medium and thus improving the heat exchange effect of the heat exchange mechanism 70. The manifold 76 can be used to feed liquid into multiple sub-flow channels 70a1 through one manifold 76 and to discharge liquid from multiple sub-flow channels 70a1 through another manifold 76, thereby simplifying the pipeline structure design.

[0207] Please refer to the reference. Figure 14 , Figure 16 , Figure 17 as well as Figure 21 In one embodiment of this application, the outer frame 72 is provided with a notch 721, which penetrates the inner and outer sides of the outer frame 72 and extends along the first direction Z; the collector 76 has a protrusion 765, and one end of the diversion channel 763 away from the collector cavity 761 can penetrate the protrusion 765. The protrusion 765 is accommodated in the notch 721. The separator 75 is provided with a plug 751 at the position corresponding to the diversion channel 763. The plug 751 is inserted into the diversion channel 763, and one side of the plug 751 in the first direction Z is spaced apart from the channel wall of the diversion channel 763.

[0208] In this embodiment, the assembly of the separator 75 and the collector 76 is achieved by inserting the plug-in post 751 on the separator 75 into the diversion channel 763 of the collector 76. The insertion operation is relatively simple, thus improving the convenience of assembling the separator 75 and the collector 76. Furthermore, a notch 721 is provided in the outer frame 72, allowing the assembled separator 75 and collector 76 to be directly inserted along the first direction Z between the outer frame 72 and the inner frame 71, further improving the convenience of assembling the separator 75 and collector 76 between the outer frame 72 and the inner frame 71. Simultaneously, the protrusion 765 on the collector 76 can seal the notch 721.

[0209] In one embodiment of this application, the first direction Z can be a vertical direction, and the upper surface of the plug-in post 751 can be spaced apart from the channel wall of the diversion channel 763 so that the channel wall of the diversion channel 763 can directly support the plug-in post 751 after insertion, further improving the convenience of installing the separator 75.

[0210] Additionally, it should be noted that when a sub-channel 70a1 is formed between the upper end partition 75A and the upper cover plate 73, all partitions 75 may be provided with insertion posts 751. When the upper end partition 75A is attached to the upper cover plate 73, so that there is no sub-channel 70a1 between them, the upper end partition 75A mainly functions to seal at the upper end, thereby enhancing the sealing performance in conjunction with the upper cover plate 73. Therefore, the upper end partition 75A may not be provided with insertion posts 751. For the lower end partition 75A, since the insertion post 751 is supported by abutting against the channel wall of the diversion channel 763 through its lower surface, the heat exchange medium flowing out of the diversion channel 763 needs to be above the corresponding partition 75, so that no sub-channel 70a1 is formed below the lower end partition 75A. Therefore, the end separator 75A located at the lower end can be provided with a plug post 751, and can also be attached to the cover plate 73 located at the lower end.

[0211] Of course, in other embodiments, the insertion post 751 may also be spaced apart from the channel wall of the diversion channel 763 on its lower surface, in which case it can be bonded to the channel wall of the diversion channel 763. The configuration of the insertion post 751 can be the opposite of the above, that is, the lower end partition 75A may have a sub-channel 70a1 spaced apart from the lower end cover plate 73, allowing the lower end partition 75A to have the insertion post 751; or the lower end partition 75A may not have the insertion post 751. The upper end partition 75A, however, does not have a sub-channel 70a1 formed above it, therefore the upper end partition 75A can have the insertion post 751 and can also be attached to the upper end cover plate 73.

[0212] As can be seen, the partition 75 in this application may be provided with plug-in posts 751 for some partitions 75, or all partitions 75 may be provided with plug-in posts 751.

[0213] Please refer to Figure 14 In one embodiment of this application, the two flow collectors 76 can be located on both sides of the outer frame 72 in the second direction X, so as to extend the flow path of the heat exchange medium, increase the heat exchange area and further improve the heat exchange effect of the heat exchange mechanism 70.

[0214] Please refer to the reference. Figure 14 , Figure 16 as well as Figure 17 In one embodiment of this application, a recessed space 723 may be provided on the outer side of the outer frame 72, the notch 721 is connected to the recessed space 723, and the collector 76 is disposed in the recessed space 723.

[0215] In this embodiment, the recessed space 723 provides space for the current collector 76 to be installed, allowing the current collector 76 and the outer frame 72 to be distributed more compactly. After installation, the overall shape of the heat exchange mechanism 70 can be more regular, which helps to reduce the space occupied by the heat exchange mechanism 70 and improves the convenience of its installation and arrangement in the battery box 30.

[0216] Please refer to the reference. Figure 12 , Figure 14 , Figure 16 , Figure 17 , 19 as well as Figure 20In one embodiment of this application, the number of inner frame bodies 71 is at least two, and the at least two inner frame bodies 71 are arranged side by side with intervals along the third direction Y, and the first direction Z, the second direction X and the third direction Y intersect each other; the heat exchange mechanism 70 also includes a turbulence member 74, which is disposed between adjacent inner frame bodies 71 and is spaced apart from the inner frame bodies 71, and the turbulence member 74 extends along the first direction Z.

[0217] The flow-deflecting element 74 can extend along the first direction Z to form a columnar structure, or it can be formed into a plate structure. This application does not limit the structural type of the flow-deflecting element 74. Furthermore, when the heat exchange mechanism 70 also includes partitions 75 as described above, at least some partitions 75 are provided with fourth holes 753 penetrating both sides of the partition 75 in the first direction Z, for the flow-deflecting element 74 to pass through. For example, only the end partitions 75A may be provided with fourth holes 753, and the two end partitions 75A can be used to clamp and limit the ends of the flow-deflecting element 74. Moreover, for structural stability, the end partitions 75A may be provided with insertion slots 75A1 for the flow-deflecting element 74 to be inserted. Of course, all partitions 75 may be provided with fourth holes 753, so that the flow-deflecting element 74 can be clamped and limited by two cover plates 73. This application does not limit the connection method of the flow-deflecting element 74.

[0218] In this embodiment, the arrangement of at least two inner frame bodies 71 can further reduce the number of heat exchange mechanisms 70 required, thus simplifying the structural design. The flow-disrupting element 74 can turbulently flow through the heat exchange medium in the medium channel 70a, continuously breaking down and thinning the thermal boundary layer to reduce thermal resistance; or it can induce eddies and turbulence, enhancing the macroscopic mixing of hot and cold fluids, thereby creating a more efficient heat exchange environment and improving the heat exchange effect of the heat exchange mechanism 70.

[0219] Please refer to the reference. Figure 9 and Figure 13 In one embodiment of this application, a buffer 78 may be provided between the current collector 76 and the outer frame 72 to provide buffering protection between the two. The buffer 78 may be a silicone or rubber component; this application does not limit the type of buffer pad.

[0220] Please refer to the reference. Figure 8 , Figure 9 as well as Figure 12 In one embodiment of this application, at least one of the outer frame 72 and the manifold 76 is heat-exchange connected to the outer side of the channel wall of the second channel 361.

[0221] In this embodiment, at least one of the outer frame 72 and the collector 76 is connected to the outside of the channel wall of the second channel 361 for heat exchange, so that the heat exchange mechanism 70 also has a cooling effect on the emissions in the second channel 361, further improving the cooling effect on the emissions.

[0222] In addition, it should be noted that the side of the manifold 76 in the first direction Z can also be heat-exchange connected to the outer side of the wall of the first channel 353 to further improve the cooling effect on the emissions in the connecting channel 351.

[0223] Please refer to the reference. Figure 9 and Figure 13 In one embodiment of this application, to improve the heat exchange effect between the heat exchange mechanism 70 and the outer wall of the second channel 361, a heat-conducting element 77 may be provided between the heat exchange mechanism 70 and the outer wall of the second channel 361. The heat-conducting element 77 may be a thermally conductive silicone pad, a metal sheet, or thermally conductive adhesive, etc., and this application does not limit the type of the heat-conducting element 77. Alternatively, when the second channel 361 is disposed within the protruding cylindrical portion 367 as described above, and is connected to the protruding cylindrical portion 367 for heat exchange via a collector 76, the heat-conducting element 77 may be disposed between the collector 76 and the protruding cylindrical portion 367.

[0224] Please refer to the reference. Figure 7 and Figure 8 In one embodiment of this application, when each battery pack 10A is provided with a heat exchange mechanism 70 and the number of battery packs 10A is at least two, in order to simplify the pipeline design, the battery device 100 also includes a delivery pipe 90. The liquid inlet collector 76 in each heat exchange mechanism 70 can be connected by a delivery pipe 90, and the liquid outlet collector 76 in each heat exchange mechanism 70 can be connected by another delivery pipe 90.

[0225] Please refer to the audit report. Figure 8 , Figure 9 , Figure 12 , Figure 16 as well as Figure 17 In one embodiment of this application, the outer frame 72 is provided with a third accommodating cavity 724, and the outer frame 72 has a third isolation wall 725 located between the medium flow channel 70a and the third accommodating cavity 724; the heat exchange mechanism 70 of the battery device 100 also includes a filler 79, which is a heat insulation structure or a phase change energy storage structure, and is disposed in the third accommodating cavity 724.

[0226] The third accommodating cavity 724 can extend along the first direction Z and penetrate at least one side of the outer frame 72 in the first direction Z. The third isolation wall 725 can be used to isolate the medium flow channel 70a from the third accommodating cavity 724, preventing the heat exchange medium in the medium flow channel 70a from entering the third accommodating cavity 724. An insulation structure can be used to insulate the outer frame 72. The insulation structure can be made of a material with relatively low thermal conductivity, for example, its thermal conductivity can be lower than that of the outer frame 72. For example, the insulation structure can use polyethylene (PE) foam, polyurethane foam, glass wool, polyisocyanurate, polyurethane, or rock wool board. The phase change energy storage structure can include a phase change material that can absorb and release heat through solid-liquid phase change or other methods. The phase change material can be paraffin wax or hydrated salts, etc.

[0227] In this embodiment, by further accommodating and filling the outer frame 72 with a thermal insulation structure or a phase change energy storage structure, the thermal insulation structure can insulate the outer frame 72, thus reducing the excessive impact on the temperature of the battery cell 10 due to the large temperature difference with the outside when the ambient temperature outside the battery device 100 is relatively low, thereby optimizing the thermal management of the battery cell 10. The phase change energy storage structure can absorb and store heat generated by the battery cell 10 through the outer frame 72. Then, when the ambient temperature outside the battery device 100 is relatively low, the phase change energy storage structure can release heat to heat the battery cell 10, similarly optimizing the thermal management of the battery cell 10.

[0228] In one embodiment of this application, multiple third accommodating cavities 724 may be provided and arranged circumferentially around the outer frame 72 to accommodate more insulation structures or phase change energy storage structures. In this case, the insulation structure and the phase change energy storage structure can be used individually or simultaneously, i.e., part of the third accommodating cavity 724 accommodates the insulation structure, and part of the third accommodating cavity 724 accommodates the phase change energy storage structure.

[0229] In one embodiment of this application, the third accommodating cavity 724 can penetrate through both sides of the outer frame 72 in the first direction Z, and the two cover plates 73 can be provided with positioning protrusions 733 so as to extend into the third accommodating cavity 724, thereby improving the accuracy and stability of the assembly of the outer frame 72 and the two cover plates 73.

[0230] In one embodiment of this application, the flame extinguishing structure 50 includes a chemical flame retardant.

[0231] Chemical flame retardants can decompose or react at high temperatures, actively extinguishing flames by absorbing heat or releasing free radical scavengers. Examples include high-temperature resistant silicon-based or phosphorus-based flame retardants.

[0232] In this embodiment, the flame extinguishing structure 50 is configured to include a chemical flame retardant, enabling the flame extinguishing structure 50 to interrupt the combustion chain reaction at the chemical level, thereby improving the reliability and efficiency of flame suppression and elimination. Furthermore, both the first part 51 and the second part 53 of the flame extinguishing structure 50 described above may include a chemical flame retardant.

[0233] In one embodiment of this application, in order to improve the stability of the flame extinguishing structure 50, the flame extinguishing structure 50 may also include porous ceramic or metal parts to carry chemical flame retardants.

[0234] Please refer to the reference. Figure 5 and Figure 7 In one embodiment of this application, the battery device 100 further includes a gas sensor 85 and a battery management system. The gas sensor 85 is disposed in the collection chamber 334; the battery management system is disposed in the first accommodating chamber 31 and is electrically connected to the battery cell 10 and the gas sensor 85.

[0235] Gas sensor 85 can be used to detect a specific characteristic gas, which may only be emitted after thermal runaway occurs in the battery cell 10. Therefore, by detecting the specific characteristic gas, it can be determined whether thermal runaway has occurred.

[0236] In this embodiment, when the gas sensor 85 detects a specific characteristic gas in the collection chamber 334, it can transmit the signal to the battery management system. The battery management system can then determine that the battery device 100 has experienced thermal runaway, so that it can promptly initiate corresponding protection measures such as power-off, thereby further improving the reliability of the battery device 100.

[0237] In one embodiment of this application, the battery device 100 further includes an alarm located in the battery compartment 30 and electrically connected to the battery management system.

[0238] An alarm is provided for issuing an alarm. The alarm can be a buzzer or a speaker capable of emitting a verbal alarm. Furthermore, the alarm can be located within the collection cavity 334, the first receiving cavity 31, or other locations; this application does not limit the location of the alarm.

[0239] In this embodiment, an alarm can be triggered in the event of thermal runaway, thereby providing a further indication of thermal runaway and facilitating appropriate protective measures by personnel.

[0240] In one embodiment of this application, the battery box 30 is provided with an exhaust port, and the battery device 100 further includes a control valve located at the exhaust port and configured to control the opening and closing of the exhaust port.

[0241] In this embodiment, a control valve is provided at the exhaust port, which can be opened to accurately transport the emissions collected in the collection chamber 334 to the treatment location via pipeline when the emissions are subsequently processed, thereby improving the convenience of emissions treatment. The control valve can be a solenoid valve or an electric valve.

[0242] Please refer to the reference. Figures 3 to 20In one embodiment of this application, the battery device 100 includes a battery cell 10, a battery case 30, and a flame extinguishing structure 50. The battery cell 10 has a pressure relief mechanism 11. The battery case 30 is provided with a first receiving cavity 31, a connecting channel 351, and a collecting cavity 334. The battery cell 10 is disposed in the first receiving cavity 31. One end of the connecting channel 351 is connected to the first receiving cavity 31 to receive the discharge from the pressure relief mechanism 11, and the other end of the connecting channel 351 is connected to the collecting cavity 334. At least a portion of the flame extinguishing structure 50 is fixedly disposed in the connecting channel 351 and configured to retard flames in the discharge flowing through the connecting channel 351. There are multiple battery cells 10. The connecting channel 351 includes a channel body 352 and multiple connecting holes 360. Each connecting hole 360 ​​is connected to the pressure relief mechanism 11 of a battery cell 10. The channel body 352 is connected to the multiple connecting holes 360 and the collecting cavity 334. At least a portion of the flame extinguishing structure 50 is disposed in the channel body 352. The flame extinguishing structure 50 includes a first part 51 and multiple second parts 53. The first part 51 is provided inside the channel body 352. Each second part 53 is correspondingly provided with a connecting hole 360 ​​to seal the connecting hole 360. The second part 53 is located outside the connecting hole 360 ​​and between the pressure relief mechanism 11 and the connecting hole 360. The battery cell 10 has a pressure relief mechanism 11 on one side in the first direction Z. The channel body 352 includes a first channel 353 and a second channel 361. The first channel 353 is connected to the connecting hole 360 ​​and is located on the side of the battery cell 10 with the pressure relief mechanism 11. The collection chamber 334 is located on the side of the battery cell 10 opposite to the pressure relief mechanism 11. The second channel 361 extends along the first direction Z and is connected to the collection chamber 334. The flame extinguishing structure 50 is provided inside both the first channel 353 and the second channel 361. The battery box 30 includes a box body 33 and a channel shell 35. The box body 33 has an installation cavity 331 and a collection cavity 334 arranged along the first direction Z. The box body 33 has a first isolation wall 335 located between the installation cavity 331 and the collection cavity 334. At least a portion of the installation cavity 331 is formed as a first receiving cavity 31. The channel shell 35 includes a plate-shaped portion 362 and a convex cylindrical portion 367. The plate-shaped portion 362 is located on the side of the battery cell 10 facing away from the collection cavity 334. The plate-shaped portion 362 has a connecting hole 360 ​​and a first channel 353. The convex cylindrical portion 367 extends along the first direction Z and has a second channel 361. The plate-shaped portion 362 and the protruding cylindrical portion 367 are disposed in the mounting cavity 331. The outer sides of the plate-shaped portion 362 and the protruding cylindrical portion 367 and a portion of the mounting cavity 331 enclose each other to form a first receiving cavity 31. The end of the protruding cylindrical portion 367 away from the plate-shaped portion 362 passes through the first isolation wall 335.The battery device 100 also includes a heat exchange mechanism 70, which has a medium flow channel 70a. The heat exchange mechanism 70 is disposed within the first accommodating cavity 31 and configured to be heat-exchangeably connected to the battery cell 10, the plate-shaped portion 362, and the protruding cylindrical portion 367. The heat exchange mechanism 70 has a second accommodating cavity 70b, with the medium flow channel 70a surrounding the outside of the second accommodating cavity 70b. The heat exchange mechanism 70 has a second isolation wall 711 located between the second accommodating cavity 70b and the medium flow channel 70a. The battery cell 10 is disposed within the second accommodating cavity 70b, and the second isolation wall 711 is heat-exchangeably connected to the battery cell 10. The heat exchange mechanism 70 has a second hole 731 communicating with the second accommodating cavity 70b at a position corresponding to the pressure relief mechanism 11 of the battery cell 10. The heat exchange mechanism 70 includes an inner frame 71, an outer frame 72, and two cover plates 73. Both ends of the inner frame 71 and the outer frame 72 are open in the first direction Z. The inner frame 71 has a second accommodating cavity 70b on its inner side and a second isolation wall 711. The outer frame 72 is spaced around the outer side of the inner frame 71. The two cover plates 73 cover the two sides of the inner frame 71 and the outer frame 72 with openings, respectively. The outer side of the inner frame 71, the outer frame 72, and the two cover plates 73 enclose a medium flow channel 70a. The cover plate 73 opposite to the pressure relief mechanism 11 has a second hole 731 and is heat-exchange connected to the plate-shaped part 362. The heat exchange mechanism 70 further includes at least one partition 75, which is disposed within the medium flow channel 70a and divides the medium flow channel 70a into at least two sub-flow channels 70a1 arranged along the first direction Z. The heat exchange mechanism 70 also includes two flow collectors 76 disposed outside the outer frame 72. Each flow collector 76 has a flow collecting cavity 761 and at least two flow branching channels 763, which are connected to the flow collecting cavity 761. Each sub-flow channel 70a1 is connected to one flow branching channel 763 of each of the two flow collectors 76. The flow collectors 76 are heat-exchange connected to the protruding cylindrical portion 367. The flame extinguishing structure 50 includes a chemical flame retardant. The battery device 100 also includes a gas sensor 85 and a battery management system. The gas sensor 85 is disposed within the collection cavity 334. The battery management system is disposed within the first accommodating cavity 31 and is electrically connected to the battery cell 10 and the gas sensor 85. The battery unit 100 also includes an alarm located in the battery compartment 30 and electrically connected to the battery management system.

[0243] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell, wherein the battery cell has a pressure relief mechanism; The battery box includes a first accommodating cavity, a communicating channel, and a collecting cavity. The individual battery cells are disposed in the first accommodating cavity. One end of the communicating channel is connected to the first accommodating cavity to receive the discharge from the pressure relief mechanism, and the other end of the communicating channel is connected to the collecting cavity. as well as A flame extinguishing structure, at least a portion of which is fixedly disposed within the communicating channel and configured to retard flames in emissions flowing through the communicating channel; The battery device also includes a gas sensor and a battery management system, wherein the gas sensor is disposed within the collection chamber; The battery management system is located within the first accommodating cavity and is electrically connected to the battery cell and the gas sensor.

2. The battery device as claimed in claim 1, characterized in that, The connecting channel includes a channel body and a connecting hole, and the connecting hole is connected to the first accommodating cavity; The channel body is connected to the connecting hole and the collecting cavity, and at least a portion of the flame extinguishing structure is fixedly disposed within the channel body.

3. The battery device as claimed in claim 2, characterized in that, The flame extinguishing structure includes a first part and a second part, and the first part is provided inside the channel body; The second part is provided corresponding to the connecting hole and configured to seal the connecting hole.

4. The battery device as claimed in claim 3, characterized in that, The second part is located outside the connecting hole and on the side where the connecting hole connects to the first accommodating cavity.

5. The battery device as claimed in claim 2, characterized in that, The connecting hole is connected to the pressure relief mechanism of the battery cell.

6. The battery device as claimed in claim 5, characterized in that, The number of battery cells is multiple, the communication channel includes multiple communication holes, each communication hole is connected to the pressure relief mechanism of a battery cell, and the channel body is connected to the multiple communication holes; or, The number of battery cells and the number of connecting channels are multiple, and the connecting hole of each connecting channel is connected to the pressure relief mechanism of a battery cell.

7. The battery device as claimed in claim 2, characterized in that, The channel body includes a first channel and a second channel, wherein the first channel is connected to the connecting hole and is located on a different side of the battery cell from the collecting cavity; The second channel is set at an angle to the first channel and is connected to the first channel and the collection chamber. The flame extinguishing structure is provided in at least the first channel in the main body of the channel.

8. The battery device as claimed in claim 7, characterized in that, The first channel and the connecting hole are located on one side of the battery cell in the first direction; The second channel extends along the first direction, and the collection cavity is located on the other side of the battery cell in the first direction.

9. The battery device as claimed in claim 7, characterized in that, Both the first channel and the second channel are equipped with the flame extinguishing structure.

10. The battery device as claimed in claim 2, characterized in that, The channel body includes a first channel, which is connected to the connecting hole and is located on one side of the battery cell in a first direction; The first channel is provided with a flow guide, and on the projection plane perpendicular to the first direction, the projection of the flow guide is misaligned with the projection of the connecting hole.

11. The battery device as claimed in claim 10, characterized in that, The two walls on both sides of the flow guide in the first direction are connected to the channel wall of the first channel, and the remaining walls of the flow guide are spaced apart from the channel wall of the first channel.

12. The battery device as claimed in claim 10, characterized in that, The number of the flow guides is multiple, and the multiple flow guides divide the first channel into multiple sub-channels, at least some of the sub-channels are cross-connected.

13. The battery device as claimed in claim 12, characterized in that, The first channel has a second channel on at least one side in the second direction, the second channel connecting the first channel and the collection cavity, and the second direction intersects the first direction; The plurality of flow guides include a first flow guide, and the plurality of first flow guides are arranged side by side at intervals along the second direction, wherein the extension direction of the first flow guide intersects the second direction but is not perpendicular to it.

14. The battery device as claimed in claim 13, characterized in that, The communication channel includes a plurality of communication holes, and the first channel is connected to the plurality of communication holes; The plurality of the connecting holes are arranged at intervals along the second direction, and each of the first flow guides is located between two adjacent connecting holes.

15. The battery device as claimed in claim 13, characterized in that, A plurality of the first flow guides arranged at intervals along the second direction form a first flow guide group, and the plurality of flow guides includes at least two first flow guide groups; At least two of the first flow guide groups are arranged side by side at intervals along a third direction, and the first direction, the second direction, and the third direction intersect each other.

16. The battery device as claimed in claim 15, characterized in that, The plurality of flow guides further includes a second flow guide, which extends along the second direction; A second flow guide is provided between two adjacent first flow guide groups, and the second flow guide is spaced apart from the first flow guide group.

17. The battery device as claimed in claim 16, characterized in that, The second guide member is provided with a first guide surface, and the channel wall of the first channel is provided with a second guide surface; In the first guide member group, among the two first guide members located at both ends, the first guide surface is arranged at a relative interval with one of the first guide members, and the second guide surface is arranged at a relative interval with the other first guide member.

18. The battery device as claimed in claim 13, characterized in that, The number of the second channels is at least two, with the two second channels respectively located on both sides of the first channel in the second direction and on both sides of the first channel in the third direction. The first direction, the second direction, and the third direction intersect each other.

19. The battery device as claimed in claim 8, characterized in that, The battery box includes: The box body has an installation cavity and a collection cavity arranged along the first direction, and the box body has a first isolation wall located between the installation cavity and the collection cavity, with at least a portion of the installation cavity forming the first receiving cavity; and The channel shell includes a plate-shaped portion and a convex cylindrical portion. The plate-shaped portion is located on the side of the battery cell facing away from the collection cavity. The plate-shaped portion has the connecting hole and the first channel. The convex cylindrical portion extends along the first direction and has the second channel.

20. The battery device as claimed in claim 19, characterized in that, The plate-shaped portion and the protruding cylindrical portion are disposed within the mounting cavity, and the outer sides of the plate-shaped portion and the protruding cylindrical portion partially enclose the mounting cavity to form the first receiving cavity; The end of the convex cylindrical portion away from the plate-shaped portion passes through the first isolation wall, or the first isolation wall is provided with a first hole communicating with the end of the convex cylindrical portion away from the plate-shaped portion.

21. The battery device as claimed in claim 19, characterized in that, The battery box includes: A first housing, one end of which is open; and The second box has the collection cavity and is detachably covered by the opening of the first box; The second housing and the first housing together form the mounting cavity, and the second housing has the first isolation wall.

22. The battery device as claimed in claim 1, characterized in that, The battery device also includes a heat exchange mechanism, which is provided with a medium flow channel; The heat exchange mechanism is located inside the first accommodating cavity and is configured to be heat-exchange connected to the outer side of the battery cell and the channel wall of the communicating channel.

23. The battery device as claimed in claim 22, characterized in that, The heat exchange mechanism is provided with a second accommodating cavity, and the medium flow channel surrounds the outside of the second accommodating cavity; The heat exchange mechanism has a second isolation wall located between the second accommodating cavity and the medium flow channel, the battery cell is disposed in the second accommodating cavity, and the second isolation wall is heat-exchange connected to the battery cell; The heat exchange mechanism is provided with a second orifice at the position corresponding to the pressure relief mechanism, and the second orifice is connected to the second accommodating cavity.

24. The battery device as claimed in claim 23, characterized in that, The heat exchange mechanism includes an inner frame and an outer structure. The pressure relief mechanism is located on one side of the battery cell in a first direction. The inner frame is open at least one end in the first direction. The inner frame has a second accommodating cavity on its inner side and a second isolation wall. The peripheral structure is located on the outside of the inner frame and surrounds the outside of the inner frame to form the medium flow channel. The peripheral structure is heat-exchange connected to the outside of the channel wall of the communicating channel. The inner frame and / or the peripheral structure are provided with the second hole.

25. The battery device as claimed in claim 24, characterized in that, The communication channel includes a first channel and a second channel. The first channel is connected to the first accommodating cavity and is located on the side of the battery cell with the pressure relief mechanism. The second channel extends along the first direction and connects the first channel and the collection cavity; The peripheral structure is heat-exchange connected to at least one of the first channel and the second channel.

26. The battery device as claimed in claim 25, characterized in that, The peripheral structure includes an outer frame and two cover plates. Both the inner frame and the outer frame are open at both ends in the first direction. The outer frame is spaced around the outside of the inner frame. The two cover plates respectively cover the inner frame and the outer frame on the two sides with openings, and the outer side of the inner frame, the outer frame, and the two cover plates enclose the medium flow channel. The cover plate opposite to the pressure relief mechanism is provided with the second hole and is heat-exchange connected to the outer side of the channel wall of the first channel.

27. The battery device as claimed in claim 26, characterized in that, The inner frame includes multiple cylindrical sections, which are arranged side by side and connected in sequence. Each cylindrical section has a second accommodating cavity on its inner side.

28. The battery device as claimed in claim 26, characterized in that, The number of inner frame bodies is at least two, and the at least two inner frame bodies are arranged in a row with intervals. The heat exchange mechanism further includes a flow-dispersing element, which is disposed between adjacent inner frames and spaced apart from the inner frames, and extends along the first direction.

29. The battery device as claimed in claim 26, characterized in that, The heat exchange mechanism further includes at least one partition, which is disposed in the medium flow channel and divides the medium flow channel into at least two sub-flow channels arranged along the first direction. The heat exchange mechanism also includes two flow collectors, which are located on the outside of the outer frame. The flow collector is provided with a flow collecting cavity and at least two flow splitting channels. The at least two flow splitting channels are connected to the flow collecting cavity, and each of the sub-flow channels is connected to one of the flow splitting channels of the two flow collectors respectively.

30. The battery device as claimed in claim 29, characterized in that, The outer frame has a notch that penetrates the inner and outer sides of the outer frame and extends along the first direction; The collector has a protrusion that is housed within the notch, and the end of the diversion channel away from the collector cavity passes through the protrusion.

31. The battery device as claimed in claim 30, characterized in that, The separator is provided with a plug at the position corresponding to the diversion channel. The plug is inserted into the diversion channel, and the plug is spaced apart from the channel wall of the diversion channel on one side in the first direction. And / or, the outer side of the outer frame is provided with a recessed space, the notch is connected to the recessed space, and the current collector is disposed in the recessed space.

32. The battery device as claimed in claim 29, characterized in that, At least one of the outer frame and the current collector is heat-exchange connected to the outer side of the channel wall of the second channel.

33. The battery device as claimed in claim 26, characterized in that, The outer frame is provided with a third accommodating cavity, and the outer frame has a third isolation wall located between the medium flow channel and the third accommodating cavity; The heat exchange mechanism of the battery device also includes a filler, which is a heat insulation structure or a phase change energy storage structure, and is disposed in the third accommodating cavity.

34. The battery device according to any one of claims 1 to 33, characterized in that, The flame retardant structure includes a chemical flame retardant.

35. The battery device according to any one of claims 1 to 33, characterized in that, The battery device also includes an alarm located in the battery compartment and electrically connected to the battery management system.

36. The battery device according to any one of claims 1 to 33, characterized in that, The battery box is provided with an exhaust port, and the battery device also includes a control valve, which is located at the exhaust port and configured to control the opening and closing of the exhaust port.

37. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 36.

38. The electrical equipment as described in claim 37, characterized in that, The electrical equipment is equipped with a sealed compartment, and the battery device is located inside the sealed compartment.

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