Battery, electric equipment and energy storage equipment

Abstract

The embodiment of the invention discloses a battery, electric equipment and energy storage equipment. The battery includes: a case; the single battery is accommodated in the box body, and the single battery is provided with a pressure relief mechanism; and one end of the discharge channel is arranged around the pressure relief mechanism, and the discharge channel is used for discharging the emissions discharged by the pressure relief mechanism to the outside of the box body through the other end of the discharge channel. According to the battery, the electric equipment and the energy storage equipment provided by the embodiment of the invention, the stability and the reliability of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a battery, an electrical device and an energy storage device. Background Art

[0002] With the continuous advancement of battery technology, various new energy industries that use batteries as energy storage devices have developed rapidly. In the development of battery technology, in addition to improving battery performance, safety issues are also an issue that cannot be ignored. If the safety of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to enhance the safety of the battery is a technical problem that needs to be solved urgently in battery technology. Summary of the invention

[0003] The embodiments of the present application provide a battery, an electrical device, and an energy storage device, which can improve the stability and reliability of the battery.

[0004] In a first aspect, a battery is provided, comprising: a casing; a battery cell accommodated in the casing, the battery cell being provided with a pressure relief mechanism; and a discharge channel, one end of which is arranged around the pressure relief mechanism, the discharge channel being used to discharge the exhaust discharged through the pressure relief mechanism to the outside of the casing through the other end of the discharge channel.

[0005] Therefore, the battery of the embodiment of the present application is provided with one end of the discharge channel surrounding the pressure relief mechanism, and the discharge channel can discharge the discharge discharged through the pressure relief mechanism to the outside of the box through the other end of the discharge channel. Specifically, when thermal runaway occurs in the battery cell, the discharge of the battery cell is directly discharged into the discharge channel after passing through the pressure relief mechanism, and then discharged to the outside of the box through the other end of the discharge channel, thereby reducing the impact of the high-temperature and high-pressure discharge on other components inside the box. For example, considering that the high-temperature and high-pressure discharge may include conductive particles, these particles may cause short circuits between multiple components in the box, thereby causing further fire or explosion. Discharging these emissions from the box can reduce further impacts on the battery, reduce the risk of explosion, and improve the reliability and stability of the battery.

[0006] In some embodiments, the exhaust channel is not connected to the internal space of the battery. When a battery cell experiences thermal runaway, after the exhaust of the battery cell is discharged from the battery cell through the pressure relief mechanism, since the exhaust channel is not connected to the internal space of the battery, the exhaust entering the exhaust channel has little impact on other components located in the internal space of the battery, and the exhaust in the exhaust channel can be discharged to the outside of the box through the other end of the exhaust channel, thereby reducing the further impact of the exhaust on the battery, reducing the risk of explosion, and improving the reliability and stability of the battery.

[0007] In some embodiments, the battery includes: a flow guide, a discharge channel is arranged on the flow guide, a pressure relief mechanism is located at a first wall of the battery cell, the first wall faces the box wall of the box, and at least a portion of the flow guide is located between the first wall and the box wall. In this way, the length of the discharge channel included in the flow guide is relatively short, so the path of the high-temperature and high-pressure emissions in the discharge channel is shorter, which can reduce the impact of the emissions on the flow guide and the components arranged around the flow guide, and can make the emissions pass through the discharge channel and discharge the box as soon as possible.

[0008] In some embodiments, the box wall is provided with a first through hole, and the guide member penetrates the box wall through the first through hole. Since the guide member penetrates the box wall, the exhaust entering the exhaust channel can be directly discharged to the outside of the box along the guide member to reduce the impact of the exhaust on the internal components of the box.

[0009] In some embodiments, the guide piece is sealed to the wall of the box body. On the one hand, it can improve the sealing of the box body during normal use of the battery. On the other hand, when a battery cell has thermal runaway, it can reduce the risk of emissions discharged through the pressure relief mechanism entering the emission channel of the guide piece and then entering the interior of the box through the gap between the guide piece and the wall of the box body, thereby reducing the impact or even damage of this part of the emissions on the structure inside the box. On the other hand, it can also reduce the risk of emissions discharged to the outside of the box entering the box again through the gap between the guide piece and the wall of the box, thereby reducing the risk of heat diffusion inside the battery.

[0010] In some embodiments, the guide member is detachably connected to the box wall to facilitate installation and maintenance. For example, when the guide member or part of the box structure is damaged, the guide member and the box can be disassembled and only the guide member or only the box can be replaced.

[0011] In some embodiments, the flow guide member is connected to the box wall via a snap-fit ​​structure, which has a simple structure and is easy to implement.

[0012] In some embodiments, the clamping structure includes a first protrusion structure and a second protrusion structure protruding from the outer periphery of the flow guide, and the box wall is arranged between the first protrusion structure and the second protrusion structure. The first protrusion structure and the second protrusion structure clamp the box wall, thereby fixing the flow guide and the box wall, which has a simple structure and is easy to implement.

[0013] In some embodiments, the clamping structure includes a pressure ring arranged around the circumference of the guide member, and the pressure ring is located between the second protruding structure and the box wall. By setting the pressure ring between the box wall and the second protruding structure, the pressure on the box wall can be increased, so that the box wall can be clamped by the mutual cooperation between the pressure ring, the second protruding structure and the first protruding structure, thereby further improving the structural stability and structural strength.

[0014] In some embodiments, the pressure ring has a notch, and the notch is used to sleeve the pressure ring onto the outer periphery of the guide member through the notch, thereby clamping the box wall, which is convenient for installation and can improve structural stability.

[0015] In some embodiments, the orthographic projection of the second protruding structure along the first direction does not overlap with the orthographic projection of the box wall along the first direction, and the first direction is the thickness direction of the first wall. In this way, when the flow guide passes through the first through hole of the box wall, the second protruding structure will not block the box wall, thereby improving the installation efficiency between the box wall and the flow guide.

[0016] In some embodiments, a first sealing gasket is disposed between the first protruding structure and the box wall to improve the sealing between the box wall and the first protruding structure.

[0017] In some embodiments, the first protrusion structure is located inside the box body, and the second protrusion structure is located outside the box body, so as to facilitate the installation of the guide member and the box body.

[0018] In some embodiments, the guide member and the box wall are an integrally formed structure, which can improve the structural stability between the guide member and the box wall and improve the efficiency of processing and assembly.

[0019] In some embodiments, the battery further comprises: an insulating plate, the insulating plate is located between the first wall of the battery cell and the box wall of the box, the discharge channel runs through the insulating plate, and the first wall is provided with a pressure relief mechanism. The discharge channel is arranged to run through the insulating plate, so that the mutual influence between the insulating plate and the discharge channel can be reduced, for example, the insulating plate will not block the discharge channel, so that the discharge in the discharge channel can be discharged in time, and the structural stability can also be improved.

[0020] In some embodiments, the battery further includes: an insulating plate, the insulating plate is located between the first wall and the box wall, and the discharge channel passes through the insulating plate. The insulating plate and the flow guide are an integrally formed structure; or, the insulating plate and the flow guide are separately arranged, the insulating plate is provided with a second through hole, and the flow guide passes through the insulating plate through the second through hole. Arranging the insulating plate and the flow guide as an integrally formed structure can simplify the structure, facilitate installation, and improve the processing efficiency of the battery. Alternatively, the insulating plate and the flow guide can also be arranged separately, which can reduce the processing difficulty of the insulating plate, making the connection and fixing method between the insulating plate and the flow guide more flexible, so as to improve the flexibility of the structure.

[0021] In some embodiments, the battery further comprises: a busbar component, the busbar component is electrically connected to the electrode terminal disposed on the first wall of the battery cell, and the insulating plate is used to support the busbar component. The busbar component is supported by the insulating plate, and the insulating plate and the busbar component are then fixed to the battery cell, which can improve the stability of the busbar component and thus improve the structural stability of the battery.

[0022] In some embodiments, one end of the flow guide member facing the first wall abuts against the first wall, and a second sealing gasket is disposed between the flow guide member and the first wall. The flow guide member abuts against the first wall, and a second sealing gasket is disposed between the two, which can improve the sealing between the flow guide member and the first wall, and for the emissions discharged through the pressure relief mechanism, the emissions discharged through the gap between the flow guide member and the first wall can be reduced, thereby reducing the impact of the emissions on other components disposed on the first wall.

[0023] In some embodiments, the guide member and the first wall are integrally formed structures, which can simplify the structure and improve the processing efficiency of the battery on the one hand; on the other hand, it can improve the sealing between the guide member and the first wall, so that the emissions can directly enter the emission channel after being discharged through the pressure relief mechanism, and then be discharged from the box body, reducing the impact of the emissions on the components inside the box body.

[0024] In some embodiments, the first wall is provided with a pressure relief hole, the pressure relief mechanism covers the pressure relief hole, the first wall is provided with a third protrusion structure around the pressure relief hole, and the flow guide surrounds the outer side of the third protrusion structure. The position of the flow guide can be positioned by the third protrusion structure, and the mutual influence between the flow guide and the third protrusion structure can be reduced, thereby improving the efficiency of installation and fixation of the flow guide.

[0025] In some embodiments, the end of the discharge channel is covered with a protective layer. When the battery is in normal use, the protective layer can make the discharge channel relatively sealed, reduce the impact of the outside of the box on the discharge channel, and improve the stability of the discharge channel.

[0026] In some embodiments, the end of the discharge channel is covered with a protective layer, and the protective layer is connected to the guide member to facilitate installation and improve the stability of the protective layer.

[0027] In some embodiments, the protective layer is used to be destroyed by the emissions so as to discharge the emissions out of the emission channel, reduce the obstruction of the protective layer to the emissions, and improve the emission efficiency of the emissions.

[0028] In some embodiments, the battery includes a plurality of battery cells, and one discharge channel is provided corresponding to the pressure relief mechanisms of the plurality of battery cells, so as to simplify the structural complexity of the battery.

[0029] In some embodiments, the battery includes multiple battery cells and multiple exhaust channels, and the pressure relief mechanisms of the multiple battery cells correspond to the multiple exhaust channels one by one. In this way, when any battery cell has thermal runaway, an exhaust channel is provided correspondingly to discharge the exhaust of the battery cell in time; and the exhaust channel is only provided corresponding to one battery cell, which can reduce the impact of the exhaust on other battery cells, reduce the risk of thermal diffusion of the battery, and improve the reliability of the battery.

[0030] In some embodiments, the box body includes: a first box body portion and a second box body portion, and the first box body portion and the second box body portion are sealed to form a hollow structure inside the box body for accommodating a plurality of battery cells.

[0031] In some embodiments, the battery further includes a protective cover, which is connected to the box body and forms a passage with the box body, and the protective cover is provided with a discharge port, and the emissions discharged from the discharge channel are discharged to the outside of the battery through the passage and the discharge port. In this way, the position of the discharge port can be reasonably set according to the actual application scenario of the battery, so that the emissions discharged from the discharge port are discharged in a directional manner, reducing the impact of the emissions on other components outside the battery.

[0032] In a second aspect, an electric device is provided, comprising: the battery described in the first aspect or any one embodiment of the first aspect, wherein the battery is used to supply power to the electric device.

[0033] In some embodiments, the electrical equipment is a vehicle, a ship or a spacecraft.

[0034] In some embodiments, the electrical equipment includes a vehicle. The other end of the emission channel is used to discharge the emissions toward the bottom of the vehicle; and / or a blocking component is provided between the box and the vehicle, and the blocking component is provided between the outlet of the emission channel and the passenger compartment of the vehicle. The end of the battery's emission channel is directed toward the bottom of the vehicle, away from the passenger compartment of the vehicle, so that after the emissions are discharged from the battery's emission channel, they are discharged toward the bottom of the vehicle away from the passenger compartment, thereby reducing the impact of the emissions on the passenger compartment and improving the reliability of the vehicle. Alternatively, the blocking component provided can also be used to block the emissions discharged through the emission channel, thereby reducing the impact of the emissions on the passenger compartment and improving the reliability of the vehicle.

[0035] In a third aspect, an energy storage device is provided, comprising: the battery described in the first aspect or any one embodiment of the first aspect, wherein the energy storage device is used to store multiple batteries.

[0036] In some embodiments, the energy storage device further includes: a cabinet, the cabinet is used to accommodate multiple batteries, a protective cover and a discharge pipeline are arranged outside the cabinet, one end of the discharge pipeline is connected to the protective cover, the other end of the discharge pipeline is connected to the outside of the cabinet, the discharge pipeline is connected to the discharge channel, and the discharge pipeline is used to discharge the emissions discharged from the discharge channel to the outside of the cabinet. If there is a battery in the energy storage device that has thermal runaway, the emissions discharged from the discharge channel of the battery can enter the protective cover and be discharged from the cabinet through the discharge pipeline, thereby reducing the impact of the emissions on other batteries in the energy storage device and improving the structural stability and reliability of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1A schematic diagram of a partial structure of a battery according to an embodiment of the present application;

[0038] Figure 2 A schematic diagram of a partial exploded structure of a battery according to an embodiment of the present application;

[0039] Figure 3 A schematic diagram of a partial cross-sectional structure of a battery according to an embodiment of the present application;

[0040] Figures 4 to 9 They are schematic diagrams of partial cross-sectional structures of batteries according to different embodiments of the present application;

[0041] Fig.10 This is a schematic diagram of the structure of a pressure ring according to an embodiment of the present application;

[0042] Fig.11 A schematic top view of a flow guide member and a first through hole according to an embodiment of the present application;

[0043] Fig.12 This is a schematic diagram of a partial exploded structure of a flow guide member according to an embodiment of the present application;

[0044] Fig.13 This is another partial exploded structural schematic diagram of a flow guide member according to an embodiment of the present application;

[0045] Fig.14 This is a schematic diagram of a partial cross-sectional structure of a flow guide member according to an embodiment of the present application;

[0046] Fig.15 Another schematic diagram of the structure of a battery according to an embodiment of the present application;

[0047] Fig.16 A schematic diagram of the structure of a vehicle according to an embodiment of the present application;

[0048] Fig.17 This is a schematic diagram of the structure of an energy storage device according to an embodiment of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0052] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0055] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0056] The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0057] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0058] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0059] In some implementations, the battery cell in the embodiments of the present application may be a metal battery. Specifically, the metal battery may include a lithium metal secondary battery, a sodium metal battery, or a magnesium metal battery, etc., which is not limited in the embodiments of the present application.

[0060] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0061] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0062] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0063] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film. The housing includes a shell and a cover plate.

[0064] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0065] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0066] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0067] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0068] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0069] The development of battery technology must consider many design factors at the same time, such as performance parameters such as energy density, cycle life, discharge capacity, charge and discharge rate, and battery safety. For batteries, the main safety hazards come from the charging and discharging process. In order to improve the safety performance of the battery, a pressure relief mechanism is generally provided for the battery cell. The pressure relief mechanism refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. The predetermined threshold can be adjusted according to different design requirements. For example, the predetermined threshold may depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte and the separator in the battery cell. The pressure relief mechanism can adopt, for example, pressure-sensitive or temperature-sensitive elements or components, that is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism is actuated to form a channel for internal pressure or temperature to be released.

[0070] When a battery cell experiences thermal runaway or other abnormal conditions, high-temperature and high-pressure emissions will be generated inside the battery cell. The current design of the pressure relief mechanism focuses on releasing the high pressure and high heat inside the battery cell, that is, discharging the emissions from the battery cell to the outside of the battery cell. However, how to discharge the high-temperature and high-pressure emissions after they are discharged from the battery cell so as not to cause further safety problems for the battery is one of the problems that urgently need to be solved.

[0071] The embodiment of the present application provides a battery and an electrical device that can solve the above problems. The battery of the embodiment of the present application includes a box, a battery cell and a discharge channel, wherein the battery cell is contained in the box, and the battery cell is provided with a pressure relief mechanism; one end of the discharge channel is arranged around the pressure relief mechanism, and the discharge channel can discharge the discharge discharged through the pressure relief mechanism to the outside of the box through the other end of the discharge channel. In this way, when the battery cell has thermal runaway, the discharge of the battery cell is directly discharged into the discharge channel after passing through the pressure relief mechanism, and then discharged to the outside of the box through the other end of the discharge channel, reducing the impact of the high-temperature and high-pressure discharge on other components inside the box. For example, considering that the high-temperature and high-pressure discharge may include conductive particles, these particles may cause short circuits between multiple components in the box, and then cause further fire or explosion. Discharging these emissions from the box can reduce further impact on the battery, reduce the risk of explosion, and improve the reliability and stability of the battery.

[0072] Figure 1 A schematic diagram of the structure of a battery 10 according to an embodiment of the present application is shown; Figure 2 The schematic diagram of the partial exploded structure of the battery 10 of the embodiment of the present application is shown. Figure 2 Can be Figure 1 A schematic diagram of a partial exploded structure of a battery 10 is shown; Figure 3 The schematic diagram of the partial cross-sectional structure of the battery 10 of the embodiment of the present application is shown. For example, Figure 3 The cross section shown can be Figure 1 and Figure 2 The schematic diagram of the partial cross-sectional structure of the battery 10 shown, the cross-section is perpendicular to the length direction Y of the battery cell 20 included in the battery 10; Figure 4 Another partial cross-sectional schematic diagram of the battery 10 of the embodiment of the present application is shown. For example, Figure 4 The cross-sectional diagram shown can be Figure 3 An enlarged schematic diagram of area A is shown.

[0073] like Figures 1 to 4 As shown, the battery 10 may include: a box body 11, a battery cell 20 and a discharge channel 120. The battery cell 20 is accommodated in the box body 11, and the battery cell 20 is provided with a pressure relief mechanism 213; one end of the discharge channel 120 is arranged around the pressure relief mechanism 213, and the discharge channel 120 is used to discharge the exhaust discharged through the pressure relief mechanism 213 to the outside of the box body 11 through the other end of the discharge channel 120.

[0074] The battery 10 of the embodiment of the present application may include at least one battery cell 20 to meet different power requirements. Among them, multiple battery cells 20 can be connected in series, in parallel, or in mixed connection, and mixed connection refers to a mixture of series and parallel connection. For example, multiple battery cells 20 can first be connected in series, in parallel, or in mixed connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in mixed connection to form a battery 10. In other words, multiple battery cells 20 can directly form a battery 10, or they can first form a battery module, and then the battery module can form a battery 10.

[0075] The battery cell 20 of the embodiment of the present application may refer to any battery cell 20 included in the battery 10, and the shape of the battery cell 20 may be set according to the actual application. For example, the battery cell 20 may be as follows: Figures 1 to 4 The rectangular parallelepiped shown in FIG. 1 may also be different from Figures 1 to 4 Other shapes shown, such as a cylinder, etc., are not limited to the embodiments of the present application.

[0076] It should be understood that Figures 1 to 4 As shown, the battery 10 of the embodiment of the present application may include a box body 11, which can be used to accommodate at least one battery cell 20. The box body 11 of the embodiment of the present application is a hollow structure inside, and at least one battery cell 20 is accommodated in the box body 11. Specifically, the box body 11 includes: a first box body portion 111 and a second box body portion 112, and the first box body portion 111 and the second box body portion 112 are sealed and connected. For example, the first box body portion 111 and the second box body portion 112 can be buckled together to form a hollow structure. The shape of the first box body portion 111 and the second box body portion 112 can be determined according to the shape of the components contained inside, for example, it can be determined according to the shape of the combination of multiple battery cells 20 contained inside.

[0077] In the embodiment of the present application, at least one of the first box body 111 and the second box body 112 has an opening. Figures 1 to 4 As shown, only one of the first box body 111 and the second box body 112 may be a hollow cuboid with an opening, while the other may be in the shape of a plate to cover the opening. Here, the first box body 111 is a hollow cuboid with an opening, and the second box body 112 is in the shape of a plate. Then, the second box body 112 is used to cover the opening of the first box body 111 to form a box body 11 with a closed chamber, which can be used to accommodate at least one battery cell 20. If the box body 11 contains multiple battery cells 20, the multiple battery cells 20 can be connected in parallel, in series, or in a mixed combination and placed in the box body 11 formed by buckling the first box body 111 and the second box body 112.

[0078] For example, different from Figures 1 to 4As shown, the first box body portion 111 and the second box body portion 112 can also be hollow rectangular parallelepipeds and each has an open face, the opening of the first box body portion 111 and the opening of the second box body portion 112 are arranged opposite to each other, and the first box body portion 111 and the second box body portion 112 are interlocked to form a box body 11 with a closed chamber, which can be used to accommodate at least one battery cell 20.

[0079] It should be understood that the battery cell 20 of the embodiment of the present application is provided with a pressure relief mechanism 213, which refers to an element or component that is activated when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold to release the internal pressure or temperature. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte and the separator in the battery cell 20.

[0080] The "actuation" mentioned in this application means that the pressure relief mechanism 213 is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 20 can be released. The action produced by the pressure relief mechanism 213 may include but is not limited to: at least a part of the pressure relief mechanism 213 is broken, shattered, torn or opened, etc. When the pressure relief mechanism 213 is actuated, the high-temperature and high-pressure substances inside the battery cell 20 will be discharged from the actuated part as emissions. In this way, the battery cell 20 can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0081] The emissions from the battery cells 20 mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the isolation membrane, high-temperature and high-pressure gas generated by the reaction, flames, and the like.

[0082] In the embodiment of the present application, one end of the discharge channel 120 is arranged around the pressure relief mechanism 213. In this way, when the battery cell 20 has thermal runaway, the emissions of the battery cell 20 can be directly discharged into the discharge channel 120 after being discharged from the battery cell 20 through the pressure relief mechanism 213, and then discharged to the outside of the box body 11 through the other end of the discharge channel 120, thereby reducing the impact of the high-temperature and high-pressure emissions on other components inside the box body 11. For example, considering that the high-temperature and high-pressure emissions may include conductive particles, these particles may cause a short circuit between multiple components in the box body 11, thereby causing further fire or explosion. Discharging these emissions from the box body 11 can reduce further impact on the battery 10, reduce the risk of explosion, and improve the reliability and stability of the battery 10.

[0083] For example, the battery 10 may further include a busbar 16, which may be used to realize electrical connection between multiple battery cells 20, such as parallel connection, series connection or mixed connection. The busbar 16 may realize electrical connection between the battery cells 20 by connecting the electrode terminals 214 of the battery cells 20; or, the busbar 16 may also realize electrical connection between the battery cells 20 by connecting other components of the battery cells 20, for example, the busbar 16 may be electrically connected to the sealing structure or housing of the battery cells 20, thereby realizing electrical connection between the battery cells 20. Therefore, if the conductive particles included in the high-temperature and high-pressure emissions cannot be discharged to the outside of the housing 11 in a timely and effective manner, these conductive particles may easily cause short circuits between the busbars 16 inside the housing 11, thereby causing further fire or explosion, and discharging these emissions from the housing 11 can reduce further impact on the battery 10, reduce the risk of explosion, and improve the reliability and stability of the battery 10.

[0084] It should be understood that the battery 10 of the embodiment of the present application may include a plurality of battery cells 20. For any one of the plurality of battery cells 20, the pressure relief mechanism 213 of the battery cell 20 may be correspondingly provided with a discharge channel 120; but for any discharge channel 120 included in the battery 10, the discharge channel 120 may correspond to the pressure relief mechanism 213 of at least one battery cell 20.

[0085] In some embodiments, the battery 10 includes a plurality of battery cells 20 and a plurality of discharge channels 120, and the pressure relief mechanisms 213 of the plurality of battery cells 20 correspond to the plurality of discharge channels 120 one by one. In this way, when any battery cell 20 has thermal runaway, a corresponding discharge channel 120 is provided to discharge the discharge of the battery cell 20 in time; and the discharge channel 120 is only provided corresponding to one battery cell 20, which can reduce the impact of the discharge therein on other battery cells 20, reduce the risk of thermal diffusion of the battery 10, and improve the reliability of the battery 10.

[0086] In some embodiments, the battery 10 includes a plurality of battery cells 20, and one discharge channel 120 is provided corresponding to the pressure relief mechanisms 213 of the plurality of battery cells 20, so as to simplify the structural complexity of the battery 10. Specifically, the battery 10 includes a plurality of battery cells 20 and at least one discharge channel 120, and any one of the at least one discharge channel 120 satisfies: the discharge channel 120 corresponds to the pressure relief mechanisms 213 of the plurality of battery cells 20; in addition, different discharge channels 120 included in the battery 10 may correspond to the pressure relief mechanisms 213 of battery cells 20 of different numbers or the same number.

[0087] As an illustration, each discharge channel 120 corresponds to the pressure relief mechanism 213 of a row or column of battery cells 20 .

[0088] In this way, each exhaust channel 120 can be used to discharge exhaust from at least one battery cell 20 , which can reduce the number of exhaust channels 120 included in the battery 10 , simplify the internal structure of the battery 10 , and improve the processing efficiency of the battery 10 .

[0089] For ease of explanation, the embodiments of the present application mainly take the one-to-one correspondence between the pressure relief mechanisms 213 of the multiple battery cells 20 included in the battery 10 and the multiple exhaust channels 120 as an example, and take any one of the pressure relief mechanisms 213 and its corresponding exhaust channel 120 as an example for description, but the embodiments of the present application are not limited to this.

[0090] In the embodiment of the present application, the exhaust passage 120 is not connected to the internal space of the battery 10. Specifically, Figures 1 to 4 As shown, when thermal runaway occurs in the battery cell 20, after the emissions of the battery cell 20 are discharged from the battery cell 20 through the pressure relief mechanism 213, since the emission channel 120 is not connected to the internal space of the battery 10, the emissions entering the emission channel 120 have little impact on other components located in the internal space of the battery 10 (such as the busbar component 16, the electrode terminal 214, etc.), and the emissions in the emission channel 120 can be discharged to the outside of the box body 11 through the other end of the emission channel 120, thereby reducing further impact of the emissions on the battery 10, reducing the risk of explosion, and improving the reliability and stability of the battery 10.

[0091] It should be understood that the fact that the exhaust channel 120 is not connected to the internal space of the battery 10 may mean that the exhaust channel 120 is an independent structure, and the exhaust channel 120 is isolated from other spaces of the battery 10 .

[0092] In some embodiments, the exhaust channel 120 may also be disconnected from local components inside the battery 10. For example, the exhaust channel 120 is at least disconnected from the high-voltage connection area inside the battery 10, that is, the exhaust channel 120 is at least separated from the high-voltage connection area inside the battery 10. In this way, when thermal runaway occurs in the battery cell 20, after the exhaust of the battery cell 20 is discharged from the battery cell 20 through the pressure relief mechanism 213, the exhaust enters the exhaust channel 120. Since the exhaust channel 120 is disconnected from the high-voltage connection area inside the battery 10, the impact of the exhaust on the high-voltage connection area inside the battery 10 can at least be reduced, such as reducing the conductive particles in the exhaust from entering the high-voltage connection area inside the battery 10, thereby reducing the risk of short circuit or even fire.

[0093] It should be understood that the discharge channel 120 of the embodiment of the present application can be implemented in a variety of ways. For example, the battery 10 includes: a flow guide 12, the discharge channel 120 is arranged on the flow guide, the pressure relief mechanism 213 is located on the first wall 210 of the battery cell 20, the first wall 210 faces the box wall 113 of the box 11, and at least part of the flow guide 12 is located between the first wall 210 and the box wall 113. Specifically, as Figures 1 to 4 As shown, a guide member 12 is arranged between the first wall 210 of the battery cell 20 and the corresponding box wall 113, so that the length of the discharge channel 120 included in the guide member 12 can be relatively short, so that the path of high-temperature and high-pressure emissions in the discharge channel 120 is shorter. On the one hand, it can reduce the impact of emissions on the guide member 12 and the components arranged around the guide member 12, and on the other hand, it can make the emissions be discharged from the box 11 through the discharge channel 120 as soon as possible.

[0094] It should be understood that the guide member 12 of the embodiment of the present application is provided with a discharge channel 120. For example, the guide member 12 can be a structure with a hollow interior, such as a hollow tubular structure, in which the hollow interior is the discharge channel 120 for transmitting emissions, but the embodiment of the present application is not limited to this.

[0095] The shape of the exhaust passage 120 in the embodiment of the present application can be set according to the actual application. Figures 1 to 4 As shown, the discharge channel 120 can be a through hole of the guide member 12, and the cross-section of the through hole can be formed into a polygon, for example, a rectangle, a hexagon or an octagon, or the cross-section of the through hole can also be formed into a circle or other shapes to reduce the difficulty of processing.

[0096] The pressure relief mechanism 213 of the embodiment of the present application is disposed on the first wall 210 of the battery cell 20, wherein the first wall 210 may be any wall of the battery cell 20. Specifically, the battery cell 20 may be a polyhedral structure, that is, the battery cell 20 includes a plurality of walls, and the first wall 210 may be any wall of the battery cell 20, for example, Figure 1 and Figure 4 As shown, here, the first wall 210 is taken as an example as a wall with the smallest area of ​​the battery cell 20, but the embodiments of the present application are not limited thereto.

[0097] It should be understood that the pressure relief mechanism 213 of the embodiment of the present application can be a part of the first wall 210, or it can be a separate structure from the first wall 210 and fixed to the first wall 210 by, for example, welding. For example, when the pressure relief mechanism 213 is a part of the first wall 210, for example, the pressure relief mechanism 213 can be formed by providing a notch on the first wall 210, and the thickness of the first wall 210 corresponding to the notch is less than the thickness of the pressure relief mechanism 213 in other areas except the notch. The notch is the weakest position of the pressure relief mechanism 213. When the battery cell 20 generates too much gas so that its internal pressure increases and reaches a threshold value, or the internal reaction of the battery cell 20 generates heat, causing the internal temperature of the battery cell 20 to increase and reach a threshold value, the pressure relief mechanism 213 can rupture at the notch, causing the battery cell 20 to communicate with the inside and outside, and the gas pressure and temperature are released outward through the rupture of the pressure relief mechanism 213, thereby preventing the battery cell 20 from exploding.

[0098] For another example, the pressure relief mechanism 213 may also be a separate structure from the first wall 210. The pressure relief mechanism 213 may take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and may specifically adopt pressure-sensitive or temperature-sensitive elements or structures. That is, when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 213 executes an action or a weak structure provided in the pressure relief mechanism 213 is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0099] It should be understood that the box wall 113 of the embodiment of the present application is the wall of the first wall 210 of the box 11 facing the battery cell 20, and the box wall 113 may be any wall of the box 11 of the battery 10 according to the different positions of the first wall 210. For example, the box wall 113 may be any wall included in the first box portion 111, or may be any wall included in the second box portion 112, or the box wall 113 may refer to a wall formed together after the first box portion 111 and the second box portion 112 are covered, and the embodiment of the present application is not limited thereto.

[0100] It should be understood that the embodiment of the present application in which at least a portion of the guide member 12 is located between the first wall 210 and the box wall 113 may include: the guide member 12 is completely arranged between the first wall 210 and the box wall 113; or, a portion of the guide member 12 is located between the first wall 210 and the box wall 113, for example, at least a portion of the guide member 12 may be located outside the box 11.

[0101] In the embodiment of the present application, the guide member 12 may be arranged at other positions to improve the design flexibility of the box body 11. For example, one end of the guide member 12 corresponds to the pressure relief mechanism 213 of the first wall 210, and the first wall 210 faces the box body wall 113, but the other end of the guide member 12 may correspond to another wall intersecting with the box body wall 113, that is, the guide channel 120 extends from the first wall 210 toward another wall of the box body 11 intersecting with the box body wall 113, which can make the discharge channel 120 not too long on the one hand, and can also reasonably utilize the internal space of the box body 11 on the other hand, and increase the flexibility of the arrangement of the internal components of the box body 11.

[0102] It should be understood that the fixing method of the guide member 12 of the embodiment of the present application can be flexibly set according to the actual application. For example, the guide member 12 can be set as an integral structure with other components to improve the integration of the components in the box 11 and simplify the process of processing and assembling the battery 10. For another example, the guide member 12 can also be set independently to reduce the impact on other components.

[0103] The connection relationship between the guide member 12 and the box wall 113 according to the embodiment of the present application will be described below with reference to the accompanying drawings.

[0104] In some embodiments, the box wall 113 is provided with a first through hole 114, and the guide member 12 penetrates the box wall 113 through the first through hole 114. Since the guide member 12 penetrates the box wall 113, the exhaust entering the exhaust channel 120 can be directly discharged to the outside of the box 11 along the guide member 12, so as to reduce the impact of the exhaust on the internal components of the box 11.

[0105] In some embodiments, the guide member 12 is sealed to the box wall 113. On the one hand, the sealing performance of the box 11 can be improved during normal use of the battery 10. On the other hand, when a thermal runaway occurs in the battery cell 20, the risk of emissions discharged through the pressure relief mechanism 213 entering the emission channel 120 of the guide member 12 and then passing through the gap between the guide member 12 and the box wall 113 to enter the interior of the box 11 can be reduced, thereby reducing the impact or even damage of these emissions on the internal structure of the box 11. On the other hand, the risk of emissions discharged to the outside of the box 11 passing through the gap between the guide member 12 and the box wall 113 to re-enter the box 11 can be reduced, thereby reducing the risk of heat diffusion inside the battery 10.

[0106] It should be understood that the sealing connection between the guide member 12 and the box wall 113 can be achieved in a variety of ways. For example, Figure 5 A partial cross-sectional structure diagram of a battery 10 according to another embodiment of the present application is shown. Figure 5 The cross-sectional direction and Figure 4 The cross-sectional directions are consistent, and the Figure 5 The embodiment shown can be replaced by Figure 4 The embodiment shown. Figure 5 As shown, the guide member 12 can be integrally formed with the box wall 113 to achieve a sealed connection between the guide member 12 and the box wall 113 .

[0107] For another example, the box wall 113 may not be provided with a through hole, and the flow guide member 12 abuts against the box wall 113 . Figure 6 A partial cross-sectional structure diagram of a battery 10 according to another embodiment of the present application is shown. Figure 6 The cross-sectional direction and Figure 4 or Figure 5 The cross-sectional directions are consistent, and the Figure 6 The embodiment shown can be replaced by Figure 4 or Figure 5 The embodiment shown. Figure 6 As shown, the guide member 12 can abut against the box wall 113 to achieve a sealed connection between the guide member 12 and the box wall 113. During normal use of the battery 10, the box wall 113 is relatively sealed; when the pressure relief mechanism 213 is actuated, the exhaust entering the exhaust channel 120 can destroy the corresponding area of ​​the box wall 113 to discharge the exhaust to the outside of the box 11.

[0108] Specifically, the guide member 12 can be abutted against the box wall 113 to achieve sealing in a variety of ways. For example, the guide member 12 can be connected to the box wall 113 by an adhesive to achieve a sealed connection between the guide member 12 and the box wall 113; or, the guide member 12 and the box wall 113 can be connected by welding to achieve a sealed connection between the guide member 12 and the box wall 113; or, the guide member 12 can be close to the box wall 113, or a sealing structure 15 is added between the guide member 12 and the box wall 113 to achieve a sealed connection between the guide member 12 and the box wall 113, and the embodiments of the present application are not limited thereto.

[0109] Figure 7 A partial cross-sectional structure diagram of a battery 10 according to another embodiment of the present application is shown. Figure 7 The cross-sectional direction and Figures 4 to 6 The cross-section direction of any figure is consistent, and the Figure 7 The embodiment shown can be replaced by Figures 4 to 6 The embodiment shown in any one of the figures. Figure 7As shown, a sealing structure 15 is provided between the flow guide 12 and the box wall 113 to improve the sealing performance between the flow guide 12 and the box wall 113, so as to achieve a sealed connection between the flow guide 12 and the box wall 113. For example, the sealing structure 15 can be clamped between the flow guide 12 and the box wall 113; or, a groove structure with an opening facing the box wall 113 can be provided at one end of the flow guide 12 facing the box wall 113, and the sealing structure 15 can be accommodated in the groove structure to reduce the space in the box 11 occupied by the sealing structure 15 and improve the space utilization rate.

[0110] In some embodiments, the guide member 12 and the box wall 113 may be separately provided, that is, the guide member 12 and the box wall 113 are processed independently of each other, which can simplify the structure of the box wall 113 and improve the structural flexibility of the box 11. For example, the guide member 12 and the box wall 113 are detachably connected to facilitate installation and maintenance. For example, when the guide member 12 or part of the structure of the box 11 is damaged, the guide member 12 and the box wall 113 can be disassembled, and only the guide member 12 or only the box 11 can be replaced.

[0111] In some embodiments, the guide member 12 and the box wall 113 are connected via a snap-fit ​​structure 13, which has a simple structure and is easy to implement. For example, the snap-fit ​​structure 13 can achieve a detachable connection between the guide member 12 and the box wall 113 to facilitate installation and maintenance.

[0112] In the embodiment of the present application, the position of the clamping structure 13 can be flexibly set according to the actual application. For example, the clamping structure 13 can be located at a position of the flow guide 12 close to the box wall 113, so as to connect the flow guide 12 with the box wall 113. For another example, the box wall 113 is provided with a first through hole 114, and the flow guide 12 passes through the box wall 113 through the first through hole 114. In this way, the clamping structure 13 can be set on the outside of the flow guide 12 to achieve the connection between the flow guide 12 and the inner wall of the first through hole 114.

[0113] It should be understood that the structure of the clamping structure 13 of the embodiment of the present application can be set according to the actual application. The clamping structure 13 includes a first protrusion structure 131 and a second protrusion structure 132 protruding from the outer periphery of the flow guide 12, and the box wall 113 is arranged between the first protrusion structure 131 and the second protrusion structure 132. The first protrusion structure 131 and the second protrusion structure 132 clamp the box wall 113, and then fix the flow guide 12 and the box wall 113, which has a simple structure and is easy to implement.

[0114] Figure 8 and Fig. 9 The partial cross-sectional structural schematic diagrams of the battery 10 of different embodiments of the present application are respectively shown. Figure 8 and Figure 8 The cross-sectional direction and Figures 4 to 7 The cross-section direction of any figure is consistent, and the Figure 8 and Fig. 9 The embodiments shown can be replaced by Figures 4 to 7 The embodiment shown in any one of the figures. Figure 8 and Fig. 9 As shown, the periphery of the guide member 12 is the surface of the guide member 12 away from the discharge channel 120 inside the guide member 12, or the outer surface of the guide member 12. The contour of the periphery of the guide member 12 can be flexibly set according to the actual application. For example, the shape of the cross section of the contour of the periphery of the guide member 12 can be consistent with the shape of the cross section of the discharge channel 120, for example, it can be set to a circular, rectangular, hexagonal or octagonal shape, or the shape of the cross section of the contour of the periphery of the guide member 12 can also be other shapes to reduce the complexity of the structure.

[0115] In some embodiments, the first protrusion structure and the guide member 12 are integrally formed; and / or, the second protrusion structure and the guide member 12 are integrally formed. The first protrusion structure 131 and / or the second protrusion structure 132 are integrally formed with the guide member 12, which can simplify the processing and improve the structural stability between the first protrusion structure 131 and / or the second protrusion structure 132 and the guide member 12.

[0116] It should be understood that the specific implementation of the first protrusion structure 131 and the second protrusion structure 132 of the embodiment of the present application can be set according to the actual application. For example, in order to facilitate assembly, the size of the first protrusion structure 131 and the second protrusion structure 132 can be reasonably set according to the size L1 of the first through hole 114 of the box wall 113. Specifically, Figure 8 and Fig. 9 As shown, along the second direction X, the size L3 of the first protruding structure 131 and the size L2 of the second protruding structure 132 are both larger than the size L1 of the first through hole 114, so that the box wall 113 can be fixed between the first protruding structure 131 and the second protruding structure 132 along the thickness direction Z of the box wall 113, thereby achieving relative stability between the guide member 12 and the box wall 113. The second direction X is perpendicular to the arrangement direction of the first protruding structure 131 and the second protruding structure 132, for example, Figure 8 and Fig. 9 The second direction X is taken as the thickness direction X of the battery cell 20 for example, but the embodiments of the present application are not limited thereto. For example, the second direction X may also be the length direction Y of the battery cell 20 or other directions.

[0117] In some embodiments, considering the installation process between the box wall 113 and the guide member 12, the first through hole 114 passing through the box wall 113 needs to pass through the second protrusion 132, so that the box wall 113 is sleeved on the outside of the guide member 12. Therefore, along the second direction X, the size L2 of the second protrusion structure 132 should not be set too large. The size L2 of the second protrusion structure 132 along the second direction X should be slightly larger than the size L1 of the first through hole 114. On the one hand, during the installation process of the box wall 113, the second protrusion 132 can pass through the first through hole 114 to fix the box wall 113; on the other hand, the second protrusion 132 can prevent the box wall 113 from falling off from the clamping structure 13 during the use of the battery 10, so as to improve the structural stability of the battery 10.

[0118] It should be understood that in order to further improve the structural stability of the clamping structure 13, other components may be added.

[0119] In some embodiments, the clamping structure 13 includes a pressure ring 133 disposed around the circumference of the flow guide 12, and the pressure ring 133 is located between the second protruding structure 132 and the box wall 113. Figure 4 For example, by setting a pressure ring 133 between the box wall 113 and the second protrusion structure 132, the pressure on the box wall 113 can be increased, so that the box wall 113 can be clamped through the mutual cooperation between the pressure ring 133, the second protrusion structure 132 and the first protrusion structure 131, thereby further improving the structural stability and structural strength of the battery 10.

[0120] It should be understood that the shape and size of the pressure ring 133 of the embodiment of the present application can be flexibly set according to the actual application. For example, the pressure ring 133 can be annular, and the pressure ring 133 has a certain deformation ability. When installing the pressure ring 133, the pressure ring 133 can be sleeved from the second protruding structure 132 to the outside of the guide member 12 and fixed between the second protruding structure 132 and the box wall 113.

[0121] In some embodiments, the pressure ring 133 has a notch 1331 , and the notch 1331 is used to sleeve the pressure ring 133 on the outer periphery of the guide member 12 through the notch 1331 . Fig.10 FIG. 1 is a schematic top view of the pressure ring 133 of an embodiment of the present application. Fig.10 As shown, the pressure ring 133 of the embodiment of the present application has a notch 1331, and the notch 1331 is used to sleeve the pressure ring 133 on the outer peripheral surface of the guide member 12 through the notch 1331. For example, the pressure ring 133 can be squeezed into between the box wall 113 and the plurality of second protrusion structures 132 along a thickness direction Z perpendicular to the box wall 113 through the notch 1331, thereby clamping the box wall 113, which is convenient for installation and can improve structural stability.

[0122] It should be understood that, considering that the pressure ring 133 can further improve the structural stability between the box wall 113, the second protruding structure 132 and the first protruding structure 131, when the clamping structure 13 includes the pressure ring 133, the size L2 of the second protruding structure 132 along the second direction X can be more flexible. For example, the size L2 of the second protruding structure 132 along the second direction X can be greater than, equal to, or less than the size L1 of the first through hole 114.

[0123] In some embodiments, the orthographic projection of the second protruding structure 132 along the first direction Z does not overlap with the orthographic projection of the box wall 113 along the first direction Z, and the first direction Z is the thickness direction Z of the first wall 210 . Fig.11 FIG. 1 shows a partial top view of the second protruding structure 132 and the first through hole 114 of the guide member 12 according to an embodiment of the present application. For example, Fig.11 Can be Figures 1 to 4 FIG. 1 is a schematic diagram of a partial structure of the guide member 12 and the first through hole 114. Fig.11 As shown, along the second direction X, the size L2 of the orthographic projection of the second protruding structure 132 along the first direction Z is smaller than the size L1 of the orthographic projection of the first through hole 114 along the first direction Z, so that the orthographic projection of the second protruding structure 132 along the first direction Z does not overlap with the orthographic projection of the box wall 113 along the first direction Z, that is, the orthographic projection of the second protruding structure 132 along the first direction Z can be located within the projection of the first through hole 114. In this way, when the guide member 12 passes through the first through hole 114 of the box wall 113, the second protruding structure 132 will not hinder the box wall 113, thereby improving the installation efficiency between the box wall 113 and the guide member 12; and then the pressure ring 133 can be used to fix the guide member 12 and the box wall 113.

[0124] It should be understood that regardless of whether other structures are added between the first protrusion structure 131 and the second protrusion structure 132, the specific structures of the first protrusion structure 131 and the second protrusion structure 132 of the embodiment of the present application can be flexibly set according to actual applications, and the first protrusion structure 131 and the second protrusion structure 132 can have the same or different structures to adapt to different application scenarios.

[0125] Fig.12 The schematic diagram of the partial decomposition structure of the flow guide member 12 of the embodiment of the present application is shown. For example, Figures 1 to 4 As an example, the guide member 12 shown in FIG. Fig.12 Shown in. Fig.13 Another partial exploded structural schematic diagram of the flow guide 12 of the embodiment of the present application is shown, for example, Fig.13 for Fig.12 Magnified view of area B.

[0126] The clamping structure 13 of the embodiment of the present application may include one or more second protruding structures 132. For example, the clamping structure 13 may include a second protruding structure 132, which is disposed around at least a portion of the periphery of the flow guide 12 to facilitate processing.

[0127] For example, Fig.12 and Fig.13 As shown, the clamping structure 13 may include a plurality of second protrusion structures, for example, the plurality of second protrusion structures may be arranged at intervals along the circumference of the guide member 12. By arranging a plurality of second protrusion structures 132 distributed along the circumference of the guide member 12 to fix the box wall 113, the box wall 113 can be subjected to force more evenly, and the weight of the connection 13 can be reduced, thereby reducing the weight of the guide member 12 and the weight of the entire battery 10. Furthermore, the plurality of second protrusion structures may be arranged at equal intervals along the circumference of the guide member 12, so that different regions of the guide member 12 can be subjected to force evenly, thereby improving the structural stability of the guide member 12.

[0128] Similarly, the clamping structure 13 of the embodiment of the present application may include one or more first protrusion structures 131. Moreover, the first protrusion structure 131 of the embodiment of the present application may also adopt the same structure as the second protrusion structure 132. Fig.12 and Fig.13 Taking the second protruding structure 132 as an example, the clamping structure 13 may include a plurality of first protruding structures 131 arranged at intervals, and further, another pressure ring 133 may be used to increase the structural stability.

[0129] Alternatively, the first protrusion structure 131 of the embodiment of the present application may also adopt a structure different from the second protrusion structure 132. Fig.12 and Fig.13 As shown, the clamping structure 13 may include a plurality of second protrusion structures 132 arranged at intervals, and the first protrusion structure 131 is arranged around the guide member 12 to facilitate processing and assembly. When assembling the battery 10, the guide member 12 inside the box body 11 may be fixed first, and then the box body wall 113 is sleeved on the outside of the guide member 12 from the second protrusion structure 132 to the direction of the first protrusion structure 131, so that the box body wall 113 can be relatively stably clamped on the top of the first protrusion structure 131, thereby positioning the box body wall 113.

[0130] In some embodiments, a first sealing gasket 134 is disposed between the first protruding structure 131 and the box wall 113 to improve the sealing between the box wall 113 and the first protruding structure 131 .

[0131] Fig.14The partial cross-sectional schematic diagram of the flow guide 12 of the embodiment of the present application is shown. Fig.14 Can be Figure 4 FIG. 1 is a partial schematic diagram of the guide member 12 shown in FIG. Fig.14 As shown, in some embodiments, the first protrusion structure 131 is provided with a first groove 1311 opening toward the box wall 113, and at least a portion of the first sealing gasket 132 is accommodated in the first groove 1311, thereby reducing the space inside the box 11 occupied by the first sealing gasket 132 and increasing the internal space of the box 11.

[0132] In the embodiment of the present application, the above mainly takes the case where the first protruding structure 131 is located inside the box body 11 and the second protruding structure 132 is located outside the box body 11 as an example, which can facilitate the installation of the box body 11. Specifically, when assembling the battery 10, the guide member 12 inside the box body 11 can be fixed first, and then the box body wall 113 is sleeved on the outside of the guide member 12 from the second protruding structure 132 to the first protruding structure 131, so that the box body wall 113 can be more stably stuck above the first protruding structure 131 and below the second protruding structure 132, thereby positioning the box body wall 113. However, the present application does not limit the positions of the first protruding structure 131 and the second protruding structure 132. For example, the first protruding structure 131 can also be set inside the box body 11, and the first protruding structure 132 can be located outside the box body 11.

[0133] It should be understood that the above description is mainly based on the example that the guide member 12 and the box wall 113 are separately arranged. Different from this, in some embodiments, the guide member 12 and the box wall 113 are an integrally formed structure, for example Figure 5 As shown, the structural stability between the guide member 12 and the box wall 113 can be improved, and the efficiency of processing and assembly can be improved.

[0134] The connection relationship between the guide member 12 and the insulating plate 14 according to the embodiment of the present application will be described below with reference to the accompanying drawings.

[0135] In the embodiment of the present application, the battery 10 further includes: an insulating plate 14, the insulating plate 14 is located between the first wall 210 and the box wall 113, and the discharge channel 120 passes through the insulating plate 14. The discharge channel 120 is set to pass through the insulating plate 14, which can reduce the mutual influence between the insulating plate 14 and the discharge channel 120. For example, the insulating plate 14 will not block the discharge channel 120, so that the discharge in the discharge channel 120 can be discharged in time, and the structural stability can also be improved.

[0136] In some embodiments, the insulating plate 14 and the guide member 12 are integrally formed. Figure 12 to Figure 14As shown, considering that the guide member 12 usually needs to be made of insulating material, the insulating plate 14 and the guide member 12 are set as an integrally formed structure, which can simplify the structure, facilitate installation, and improve the processing efficiency of the battery 10.

[0137] In some embodiments, the insulating plate 14 and the guide member 12 are separately provided, the insulating plate 14 is provided with a second through hole 141, and the guide member 12 passes through the insulating plate 14 through the second through hole 141. Figure 5 For example, the insulating plate 14 and the guide member 12 can be separately provided, that is, the insulating plate 14 can be processed separately and provided with a second through hole 141, and the guide member 12 is installed through the second through hole 141. This can reduce the difficulty of processing the insulating plate 14 and make the connection and fixing method between the insulating plate 14 and the guide member 12 more flexible, thereby improving the flexibility of the structure.

[0138] It should be understood that the insulating plate 14 of the embodiment of the present application is an insulating component disposed inside the box body 11. Specifically, the battery 10 also includes: a busbar component 16, the busbar component 16 is electrically connected to the electrode terminal 214 disposed on the first wall 210 of the battery cell 20, and the insulating plate 14 is used to support the busbar component 16. The busbar component 16 can realize electrical connection between multiple battery cells 20 by connecting the electrode terminals 214 of different battery cells 20. The busbar component 16 can be fixed to the corresponding components of the battery cell 20 in a variety of ways. For example, it can be fixed to the electrode terminal 214 by welding, etc., and the embodiment of the present application is not limited to this. Furthermore, the busbar component 16 can be supported by the insulating plate 14, and then the insulating plate 14 and the busbar component 16 are fixed to the battery cell 20, which can improve the stability of the busbar component 16 and thus improve the structural stability of the battery 10.

[0139] In the embodiment of the present application, the pressure relief mechanism 213 is located at the first wall 210 of the battery cell 20, and the components used to form the discharge channel 120 are sealed and connected to the first wall 210. After the pressure relief mechanism 213 is actuated, due to the sealed connection between the components used to form the discharge channel 120 and the first wall 210, the exhaust can directly enter the discharge channel 120 after being discharged through the pressure relief mechanism 213, and then be discharged from the box body 11, thereby reducing the exhaust entering the box body 11 from between the pressure relief mechanism 213 and the discharge channel 120, thereby reducing the impact on the components in the box body 11. For example, the first wall 210 where the pressure relief mechanism 213 is located can be provided with an electrode terminal 214, which can reduce the impact of the exhaust on the electrode terminal 214 and improve the reliability of the battery 10.

[0140] It should be understood that the sealing connection between the component for forming the discharge channel 120 and the first wall 210 in the embodiment of the present application can be achieved in various ways. The embodiment of the present application takes the guide member 12 for forming the discharge channel 120 as an example, but the embodiment of the present application is not limited thereto.

[0141] In some embodiments, one end of the flow guide 12 facing the first wall 210 abuts against the first wall 210, and a second sealing gasket 121 is provided between the flow guide 12 and the first wall 210. The flow guide 12 abuts against the first wall 210, and a second sealing gasket 121 is provided between the two, which can improve the sealing between the flow guide 12 and the first wall 210, and for the emissions discharged through the pressure relief mechanism 213, the emissions discharged through the gap between the flow guide 12 and the first wall 210 can be reduced, thereby reducing the impact of the emissions on other components provided on the first wall 210. For example, the first wall 210 can also be provided with an electrode terminal 214, which can reduce the impact of emissions on the electrode terminal 214, for example, it can reduce the risk of electrical connection and short circuit between the electrode terminals 214 of different battery cells 20.

[0142] In some embodiments, the end of the guide member 12 facing the first wall 210 is provided with a second groove 122 opening toward the first wall 210, and at least a portion of the second sealing gasket 121 is accommodated in the second groove 122. In this way, the space occupied by the second sealing gasket 121 can be reduced, and the space utilization rate inside the box body 11 can be improved.

[0143] In some embodiments, the guide member 12 and the first wall 210 are integrally formed structures, which can simplify the structure and improve the processing efficiency of the battery 10 on the one hand; on the other hand, it can improve the sealing between the guide member 12 and the first wall 210, so that the emissions can directly enter the emission channel 120 after being discharged through the pressure relief mechanism 213, and then be discharged from the box body 11, reducing the impact of the emissions on the components in the box body 11.

[0144] It should be understood that the guide member 12 of the embodiment of the present application can be arranged around the pressure relief mechanism 213. For example, the discharge channel 120 of the guide member 12 can surround the outer periphery of the pressure relief mechanism 213, so that the exhaust discharged by the pressure relief mechanism 213 can almost all enter the discharge channel 120 and be discharged to the outside of the box body 11 in a timely manner. The distance between the discharge channel 120 of the guide member 12 and the outer periphery of the pressure relief mechanism 213 can be set according to actual applications to adapt to different application scenarios.

[0145] In some embodiments, the first wall 210 is provided with a pressure relief hole 215, the pressure relief mechanism 213 covers the pressure relief hole 215, the first wall 210 is provided with a third protruding structure 216 around the pressure relief hole 215, and the guide member 12 surrounds the outer side of the third protruding structure 216. Figures 4 to 9As shown, the third protruding structure 216 arranged around the pressure relief hole 215 can be used to connect a protective sheet, which can be used to protect the pressure relief mechanism 213, reduce the risk of premature failure of the pressure relief mechanism 213 when the battery cell 20 is in normal use, and improve the life of the pressure relief mechanism 213. In addition, the third protruding structure 216 can also increase the deformation space of the pressure relief mechanism 213, so that the pressure relief mechanism 213 can be actuated in time when the battery cell 20 is in thermal runaway, and discharge the emissions in time. The guide member 12 is arranged on the outside of the third protruding structure 216, and the position of the guide member 12 can be positioned by the third protruding structure 216, and the mutual influence between the guide member 12 and the third protruding structure 216 can be reduced, and the installation and fixing efficiency of the guide member 12 can be improved.

[0146] In the embodiment of the present application, the end of the discharge channel 120 is covered with a protective layer 123. When the battery 10 is in normal use, the protective layer 123 can make the discharge channel 120 relatively sealed, reduce the impact of the outside of the box 11 on the discharge channel 120, and improve the stability of the discharge channel 120. The end of the discharge channel 120 is the outlet area of ​​the discharge channel 120, and the discharge is discharged from the box 11 through the end of the discharge channel 120.

[0147] In some embodiments, the protective layer 123 is connected to the guide member 12. Figure 4 , Figure 8 and Fig. 9 As shown, the guide member 12 of the embodiment of the present application may include an end of the discharge channel 120 , and the protective layer 123 may be connected to the guide member 12 to facilitate installation and improve the stability of the protective layer 123 .

[0148] In some embodiments, the protective layer 123 is connected to the box wall 113. Figure 5 and Figure 7 As shown, the box wall 113 is provided with a first through hole 114 , and the first through hole 114 may include the end of the discharge channel 120 , and the protective layer 123 is provided on the box wall 113 for easy installation.

[0149] It should be understood that the protective layer 123 of the embodiment of the present application is used to be destroyed by the emissions so as to discharge the emissions from the emission channel 120, reduce the obstruction of the protective layer 123 to the emissions, and improve the emission efficiency of the emissions.

[0150] In the embodiment of the present application, the protective layer 123 is destroyed, which may include at least a portion of the protective layer 123 being broken, shattered, torn or opened, so as to facilitate timely discharge of high-temperature and high-pressure exhaust in the exhaust channel 120. The manner in which the protective layer 123 is destroyed in the embodiment of the present application may also be flexibly set according to actual applications.

[0151] For example, considering that the emissions have high temperature and high pressure, the protective layer 123 may be made of a pressure-sensitive or temperature-sensitive material so that the emissions can damage the protective layer 123. Alternatively, the protective layer 123 may be made of a structure with relatively low strength, or may be provided with a local weak area, for example, the protective layer 123 may have notches, so that the emissions can damage the protective layer 123, for example, the protective layer 123 may be damaged at the weak area.

[0152] In some embodiments, the material of the protective layer 123 of the embodiment of the present application can be flexibly set according to the actual application. For example, the material of the protective layer 123 is generally an insulating material; for another example, the material of the protective layer 123 may include at least one of the following: polypropylene (PP) and polyethylene glycol terephthalate (PET), but the embodiment of the present application is not limited thereto.

[0153] It should be understood that one end of the exhaust passage 120 of the embodiment of the present application is arranged around the pressure relief mechanism 213. When the battery cell 20 has thermal runaway, the exhaust of the battery cell 20 can be discharged from the battery cell 20 through the pressure relief mechanism 213, and then discharged into the exhaust passage 120 directly, and then discharged to the outside of the box body 11 through the other end of the exhaust passage 120, thereby reducing the impact of the high-temperature and high-pressure exhaust on other components inside the box body 11. For example, considering that the high-temperature and high-pressure exhaust may include conductive particles, these particles may cause a short circuit between multiple components in the box body 11, thereby causing further fire or explosion. Discharging these emissions from the box body 11 can reduce further impact on the battery 10, reduce the risk of explosion, and improve the reliability and stability of the battery 10.

[0154] In addition, in order to reduce the impact of emissions discharged from the housing 11 on other components outside the housing 11 of the battery 10, other structures may be provided outside the battery 10 of the embodiment of the present application to further reduce the impact of emissions.

[0155] Fig.15 Another partial structural diagram of the battery 10 according to an embodiment of the present application is shown. Fig.15 The battery 10 shown may be Figure 1 Another schematic diagram of the battery 10 shown. Fig.15As shown, the battery 10 further includes a protective cover 17, the protective cover 17 is connected to the box body 11 and forms a passage 18 with the box body 11, and the protective cover 17 is provided with a discharge port 171, and the exhaust discharged from the exhaust channel 120 is discharged to the outside of the battery 10 through the passage 18 and the discharge port 171. In this way, the position of the discharge port 171 can be reasonably set according to the actual application scenario of the battery 10, so that the exhaust discharged from the discharge port 171 is discharged in a directional manner, reducing the impact of the exhaust on other components outside the battery 10.

[0156] In some embodiments, an exhaust valve 1711 is disposed at the exhaust port 171 , and the exhaust discharged from the exhaust channel 120 passes through the passage 18 and then is discharged from the protective cover 17 through the exhaust valve 1711 .

[0157] In some embodiments, the passage 18 may be located between the box body 11 and the protective cover 17. For example, the passage 18 may include a gap between the box body 11 and the protective cover 17, and no other structure is required to facilitate installation; or, the passage 18 may include a pipeline structure formed between the box body 11 and the protective cover 17 to achieve directional discharge of emissions, and the embodiments of the present application are not limited thereto.

[0158] It should be understood that the fixing method of the protective cover 17 and the box body 11 in the embodiment of the present application can be flexibly set according to the actual application. In some embodiments, the protective cover 17 can be sealed and connected to the box body 11; further, a sealing gasket can be added in the connection area between the protective cover 17 and the box body 11 to improve the sealing between the protective cover 17 and the box body 11. In some embodiments, the protective cover 17 can also be detachably connected to the box body 11 to facilitate installation and maintenance. For example, the protective cover 17 and the box body 11 can be connected by bolts or rivets, and the embodiments of the present application are not limited to this.

[0159] It should be understood that the technical solutions described in the embodiments of the present application are applicable to various electrical devices using the battery 10.

[0160] The electrical equipment in the embodiments of the present application may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes airplanes, rockets, space shuttles, and spacecrafts, etc.; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0161] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0162] For example, Fig.16 A partial structural schematic diagram of a vehicle 1 according to an embodiment of the present application is shown. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor, a controller and a battery 10 may be provided inside the vehicle 1, and the controller is used to control the battery 10 to power the motor. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0163] In some embodiments, the other end of the exhaust passage 120 is used to discharge the exhaust toward the bottom of the vehicle 1. Specifically, when the battery 10 is installed on the vehicle 1, the end of the exhaust passage 120 of the battery 10 can be directed toward the bottom of the vehicle 1, away from the passenger compartment 40 of the vehicle. In this way, after the exhaust is discharged from the exhaust passage of the battery 10, it is discharged toward the bottom of the vehicle 1 away from the passenger compartment 40, reducing the impact of the exhaust on the passenger compartment 40 and improving the reliability of the vehicle 1.

[0164] In some embodiments, a blocking component 30 is provided between the box 11 and the vehicle 1, and the blocking component 30 is provided between the outlet of the exhaust passage 120 and the passenger compartment 40 of the vehicle 1. In order to further reduce the impact of emissions on the vehicle 1, a blocking component 30 may be provided between the battery 10 and the vehicle 1, so that even if the outlet of the exhaust passage 120 of the battery 10 is toward or close to the passenger compartment 40 of the vehicle 1, or the battery 10 does not have a protective cover 17, the provided blocking component 30 can be used to block the emissions discharged through the exhaust passage 120, reduce the impact of emissions on the passenger compartment 40, and improve the reliability of the vehicle 1.

[0165] Fig.17 FIG. 2 shows a schematic diagram of the structure of the energy storage device 2 according to an embodiment of the present application. Fig.17 As shown, the energy storage device 2 of the embodiment of the present application may include multiple batteries 10, and the energy storage device 2 is used to store multiple batteries 10. Specifically, the energy storage device 2 may include an electric cabinet or an energy storage container, and the energy storage device 2 may be used to store, manage and transport multiple batteries 10, and the multiple batteries 10 may be uniformly managed and controlled, for example, multiple batteries 10 may be charged.

[0166] In the embodiment of the present application, the interior of the energy storage device 2 is a hollow structure, and the hollow structure can be divided into multiple functional compartments according to actual needs. For example, the energy storage device 2 may include an energy storage compartment, a thermal management compartment, and a control compartment. The energy storage compartment can be used to accommodate energy storage elements to provide electrical energy, for example, it can be used to store multiple batteries 10; the thermal management compartment can be used to accommodate thermal management components to adjust the temperature of the batteries 10 inside the energy storage device 2; the control compartment can be used to accommodate a control box to manage or assist in the operation of the components in the energy storage device 2.

[0167] In some embodiments, the positions of the energy storage compartment, the thermal management compartment, and the control compartment in the energy storage device 2 can be set according to actual applications. For example, the energy storage compartment can be set on the right side of the energy storage device 2, and the thermal management compartment and the control compartment can be set on the left side along the height direction of the energy storage device 2, for example, the thermal management compartment is set above the control compartment; or other different settings can also be used.

[0168] In some embodiments, the energy storage device 2 may include: a cabinet 201, which is used to accommodate multiple batteries 10. In the event of thermal runaway of a battery cell 20 of any battery 10, the emissions of the battery cell 20 may be discharged from the case 11 of the battery 10 through the emission channel 120 and enter the cabinet. Furthermore, the cabinet 201 may be provided with an exhaust port, through which the emissions entering the cabinet may be discharged from the cabinet 201, thereby reducing the emissions accumulated in the cabinet 201, and further reducing the impact of the emissions on other batteries 10 in the cabinet 201.

[0169] In some embodiments, a discharge pipeline 203 may be further provided in the cabinet 201, and the discharge pipeline 203 is connected to the exhaust channel 120, for example, one end of the discharge pipeline 203 is connected to the exhaust channel 120, and the other end of the discharge pipeline 203 is connected to the outside of the cabinet 201. Specifically, in the case that a battery cell 20 of any battery 10 has thermal runaway, the discharge of the battery cell 20 may be discharged from the case 11 of the battery 10 through the discharge channel 120, and enter the discharge pipeline 203, and then the discharge is discharged to the outside of the cabinet 201 through the discharge pipeline 203. Since the discharge can be discharged to the cabinet 201 through the exhaust channel 120 and the discharge pipeline 203 respectively, the influence of the discharge on other batteries 10 in the cabinet 201 can be reduced, and the risk of heat diffusion between multiple batteries 10 can be reduced.

[0170] It should be understood that the exhaust pipeline 203 of the embodiment of the present application may correspond to at least one exhaust channel 120. For example, the exhaust pipeline 203 may correspond to the exhaust channel 120 one by one to reduce the mutual influence between different exhaust channels 120, thereby reducing the mutual influence between different battery cells 20 and reducing the risk of heat diffusion. For another example, each exhaust pipeline 203 may also correspond to multiple exhaust channels 120 to reduce the number of exhaust pipelines 203, reduce structural complexity, and facilitate processing and installation.

[0171] In some embodiments, Fig.17 As shown, the energy storage device 2 includes: a cabinet 201, the cabinet 201 is used to accommodate multiple batteries 10, a protective cover 202 and a discharge pipeline 203 are arranged outside the box 11, one end of the discharge pipeline 203 is connected to the protective cover 202, and the other end of the discharge pipeline 203 is connected to the outside of the cabinet 201. The discharge pipeline 203 is connected to the discharge channel 120, and the discharge pipeline 203 is used to discharge the discharge discharged from the discharge channel 120 to the outside of the cabinet 201. If there is a battery 10 in the energy storage device 2 that has thermal runaway, the discharge discharged from the discharge channel 120 of the battery 10 can enter the protective cover 202 of the battery 10 and be discharged from the cabinet 201 through the discharge pipeline 203, thereby reducing the impact of the discharge on other batteries 10 in the energy storage device 2 and improving the structural stability and reliability of the energy storage device 2.

[0172] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: Box body (11); A battery cell (20) is contained in the box (11), and the battery cell (20) is provided with a pressure relief mechanism (213); A discharge channel (120), one end of which is arranged around the pressure relief mechanism (213), and the discharge channel (120) is used to discharge the exhaust discharged through the pressure relief mechanism (213) to the outside of the box (11) through the other end of the discharge channel (120).

2. The battery according to claim 1, characterized in that The exhaust passage (120) is not connected to the internal space of the battery.

3. The battery according to claim 1 or 2, characterized in that: The battery comprises: A flow guide (12), the discharge channel (120) being arranged on the flow guide, the pressure relief mechanism (213) being located on a first wall (210) of the battery cell (20), the first wall (210) facing a box wall (113) of the box body (11), and at least a portion of the flow guide (12) being located between the first wall (210) and the box wall (113).

4. The battery according to claim 3, characterized in that The box wall (113) is provided with a first through hole (114), and the flow guide member (12) passes through the box wall (113) through the first through hole (114).

5. The battery according to claim 3 or 4, characterized in that: The flow guide (12) is sealedly connected to the box wall (113).

6. The battery according to any one of claims 3 to 5, characterized in that The flow guide (12) is detachably connected to the box wall (113).

7. The battery according to claim 6, characterized in that The flow guide (12) and the box wall (113) are connected via a clamping structure (13).

8. The battery according to claim 7, characterized in that The clamping structure (13) comprises a first protruding structure (131) and a second protruding structure (132) protruding from the outer periphery of the flow guide (12), and the box wall (113) is arranged between the first protruding structure (131) and the second protruding structure (132).

9. The battery according to claim 8, characterized in that The clamping structure (13) comprises a pressure ring (133) arranged circumferentially around the flow guide (12). The pressure ring (133) is located between the second protruding structure (132) and the box wall (113).

10. The battery according to claim 9, characterized in that The pressure ring (133) has a notch (1331), and the notch (1331) is used to sleeve the pressure ring (133) onto the outer periphery of the flow guide (12) through the notch (1331).

11. The battery according to claim 9 or 10, characterized in that: The orthographic projection of the second protruding structure (132) along the first direction does not overlap with the orthographic projection of the box wall (113) along the first direction, and the first direction is the thickness direction of the first wall (210).

12. The battery according to any one of claims 8 to 11, characterized in that A first sealing gasket (134) is provided between the first protruding structure (131) and the box wall (113).

13. The battery according to any one of claims 8 to 12, characterized in that The first protruding structure (131) is located inside the box body (11), and the second protruding structure (132) is located outside the box body (11).

14. The battery according to claim 3, characterized in that The flow guide (12) and the box wall (113) are an integrally formed structure.

15. The battery according to any one of claims 1 to 14, characterized in that The battery also includes: An insulating plate (14), the insulating plate (14) being located between a first wall (210) of the battery cell (20) and a box wall (113) of the box (11), the discharge channel (120) penetrating the insulating plate (14), and the first wall (210) being provided with the pressure relief mechanism (213).

16. The battery according to any one of claims 3 to 14, characterized in that The battery also includes: an insulating plate (14), the insulating plate (14) being located between the first wall (210) and the box wall (113), and the discharge channel (120) passing through the insulating plate (14); Wherein, the insulating plate (14) and the flow guide (12) are an integrally formed structure, or, The insulating plate (14) and the flow guide (12) are arranged separately; the insulating plate (14) is provided with a second through hole (141); and the flow guide (12) passes through the insulating plate (14) through the second through hole (141).

17. The battery according to claim 15 or 16, characterized in that: The battery also includes: A current collecting component (16) is electrically connected to an electrode terminal (214) provided on a first wall (210) of the battery cell (20), and the insulating plate (14) is used to support the current collecting component (16).

18. The battery according to any one of claims 3 to 14, characterized in that One end of the flow guide (12) facing the first wall (210) abuts against the first wall (210), and a second sealing gasket (121) is provided between the first wall (210).

19. The battery according to any one of claims 3 to 14, characterized in that The flow guide (12) and the first wall (210) are an integrally formed structure.

20. The battery according to any one of claims 3 to 14, characterized in that The first wall (210) is provided with a pressure relief hole (215), the pressure relief mechanism (213) covers the pressure relief hole (215), the first wall (210) is provided with a third protruding structure (216) around the pressure relief hole (215), and the flow guide (12) surrounds the outer side of the third protruding structure (216).

21. The battery according to any one of claims 1 to 20, characterized in that The end of the discharge channel (120) is covered with a protective layer (123).

22. The battery according to any one of claims 3 to 14, characterized in that The end of the discharge channel (120) is covered with a protective layer (123), and the protective layer (123) is connected to the flow guide (12).

23. The battery according to claim 21 or 22, characterized in that The protective layer (123) is used to be destroyed by the exhaust so as to discharge the exhaust from the exhaust channel (120).

24. The battery according to any one of claims 1 to 23, characterized in that The battery comprises a plurality of battery cells (20), and one discharge channel (120) is provided corresponding to the pressure relief mechanisms (213) of the plurality of battery cells (20).

25. The battery according to any one of claims 1 to 23, characterized in that The battery comprises a plurality of battery cells (20) and a plurality of discharge channels (120), and the pressure relief mechanisms (213) of the plurality of battery cells (20) and the plurality of discharge channels (120) correspond one to one.

26. The battery according to any one of claims 1 to 25, characterized in that The box body (11) comprises a first box body part (111) and a second box body part (112), wherein the first box body part (111) and the second box body part (112) are sealed and connected.

27. The battery according to any one of claims 1 to 26, characterized in that The battery further comprises a protective cover (17), the protective cover (17) being connected to the box body (11) and forming a passage (187) with the box body (11), the protective cover (17) being provided with a discharge port (171), and the exhaust discharged from the exhaust channel (120) is discharged to the outside of the battery through the passage (18) and the discharge port (171).

28. An electrical equipment, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 27, wherein the battery is used to supply power to the electrical device.

29. The electrical equipment according to claim 28, characterized in that: The electrical equipment includes a vehicle; wherein the other end of the discharge channel (120) is used to discharge the exhaust toward the bottom of the vehicle, and / or, A blocking component (30) is provided between the box body (11) and the vehicle, and the blocking component (30) is provided between the outlet of the discharge passage (120) and the passenger compartment (40) of the vehicle.

30. An energy storage device, characterized in that: include: A plurality of batteries, wherein the batteries are batteries as described in any one of claims 1 to 27, and the energy storage device is used to store a plurality of the batteries.

31. The energy storage device according to claim 30, characterized in that: The energy storage device also includes: A cabinet (201) is used to accommodate a plurality of the batteries; a protective cover (202) and a discharge pipeline (203) are arranged outside the box (11); one end of the discharge pipeline (203) is connected to the protective cover (202); the other end of the discharge pipeline (203) is connected to the outside of the cabinet (201); the discharge pipeline (203) is connected to the discharge channel (120); and the discharge pipeline (203) is used to discharge the discharge discharged from the discharge channel (120) to the outside of the cabinet (201).

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