Battery and electric equipment

Abstract

The embodiment of the invention provides a battery and electric equipment. The battery comprises a first layer of battery cells and a second layer of battery cells. The first layer of battery cells and the second layer of battery cells are stacked in a first direction; the first layer of battery cells comprises a plurality of first battery cells, one end of each first battery cell in a second direction is provided with a first pressure relief mechanism, and the first direction is perpendicular to the second direction; the second layer of battery cells comprises a plurality of second battery cells, and one end of each second battery cell in the second direction is provided with a second pressure relief mechanism. According to the technical scheme provided by the invention, the reliability of the battery can be improved.

Description

Technical Field

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

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

[0003] Battery reliability is a crucial factor in battery manufacturing. Therefore, improving battery reliability is a pressing technical challenge in battery technology. Summary of the Invention

[0004] This application provides a battery and an electrical device that can improve the reliability of the battery.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, embodiments of this application provide a battery comprising a first layer of battery cells and a second layer of battery cells. The first layer of battery cells and the second layer of battery cells are stacked along a first direction; the first layer of battery cells includes a plurality of first battery cells, each first battery cell being provided with a first pressure relief mechanism; the second layer of battery cells includes a plurality of second battery cells, each second battery cell being provided with a second pressure relief mechanism. The orientations of both the first and second pressure relief mechanisms are angled to the first direction.

[0007] According to the battery embodiment of this application, the first layer of battery cells and the second layer of battery cells are stacked along the first direction, which can improve the space utilization rate inside the battery in the first direction, so as to improve the energy density of the battery. The orientation of the first pressure relief mechanism and the orientation of the second pressure relief mechanism are both set at an angle to the first direction, so that when the first pressure relief mechanism is actuated or the second pressure relief mechanism is actuated, the emissions emitted by the first pressure relief mechanism are unlikely to affect the second battery cell, or the emissions emitted by the second pressure relief mechanism are unlikely to affect the first battery cell. This can reduce the risk of thermal propagation when the battery cell thermal runaway occurs, so that the battery has high reliability.

[0008] According to some embodiments of this application, a first pressure relief mechanism is disposed at one end of the first battery cell in a second direction; a second pressure relief mechanism is disposed at one end of the second battery cell in a second direction, the second direction being perpendicular to the first direction.

[0009] In the above scheme, the first pressure relief mechanism is located at one end of the first battery cell in the second direction. When the first pressure relief mechanism is actuated, the discharged emissions are unlikely to be directed towards the second battery cell, reducing the impact of the emissions on the second battery cell and lowering the risk of thermal propagation in the event of thermal runaway from the battery cell. The second pressure relief mechanism is located at one end of the second battery cell in the second direction. When the second pressure relief mechanism is actuated, the discharged emissions are unlikely to be directed towards the first battery cell, reducing the impact of the emissions on the first battery cell and lowering the risk of thermal propagation in the event of thermal runaway from the battery cell.

[0010] According to some embodiments of this application, the orientation of the first pressure relief mechanism and the orientation of the second pressure relief mechanism are both parallel to the second direction.

[0011] In the above scheme, the first pressure relief mechanism is oriented perpendicular to the first direction. When the first pressure relief mechanism is actuated, the discharged emissions are unlikely to affect the second battery cell, thereby reducing the impact of emissions on the second battery cell, and thus reducing the risk of heat spread and improving battery reliability. Similarly, the second pressure relief mechanism is oriented perpendicular to the first direction. When the second pressure relief mechanism is actuated, the discharged emissions are unlikely to affect the first battery cell, thereby reducing the impact of emissions on the first battery cell, and thus reducing the risk of heat spread and improving battery reliability.

[0012] According to some embodiments of this application, the battery further includes a housing, in which a first layer of battery cells and a second layer of battery cells are disposed; the housing includes a first wall portion, which is disposed opposite to a first pressure relief mechanism along a second direction, and a first collection chamber is formed inside the first wall portion, which is used to collect the emissions from the first battery cells when the first pressure relief mechanism is actuated.

[0013] In the above scheme, the first wall portion is arranged opposite to the first pressure relief mechanism. When the first pressure relief mechanism is actuated, the emissions discharged by the first pressure relief mechanism can be collected by the first collection chamber, reducing the impact of the emissions on other battery cells.

[0014] According to some embodiments of this application, the battery further includes a third pressure relief mechanism disposed on the first wall portion, which is used to release emissions from the first collection chamber.

[0015] In the above scheme, the third pressure relief mechanism can release the emissions in the first collection chamber, reduce the internal pressure of the first collection chamber, and improve the reliability of the battery.

[0016] According to some embodiments of this application, the first wall portion has a first surface facing the first layer of battery cells, the first surface is provided with a first through hole, the first through hole communicates with the first collection cavity, and the first through hole is correspondingly provided with a first pressure relief mechanism.

[0017] In the above scheme, the first through hole facilitates the discharge from the first pressure relief mechanism to enter the first collection chamber, further reducing the impact of the discharge on other battery cells.

[0018] According to some embodiments of this application, the housing further includes a second wall portion, which is disposed opposite to the second pressure relief mechanism along a second direction. A second collection chamber is formed inside the second wall portion, which is used to collect the emissions of the second battery cell when the second pressure relief mechanism is actuated.

[0019] In the above scheme, the second wall portion is arranged opposite to the second pressure relief mechanism. When the second pressure relief mechanism is actuated, the emissions discharged by the second pressure relief mechanism can be collected by the second collection chamber, reducing the impact of the emissions on other battery cells.

[0020] According to some embodiments of this application, the second wall portion is integrally formed with the first wall portion.

[0021] In the above scheme, the second wall portion is integrally formed with the first wall portion, which facilitates processing and manufacturing.

[0022] According to some embodiments of this application, the battery further includes a fourth pressure relief mechanism disposed on the second wall portion, which is used to release emissions from the second collection chamber.

[0023] In the above scheme, the fourth pressure relief mechanism can release the emissions in the second collection chamber, reduce the internal pressure of the second collection chamber, and improve the reliability of the battery.

[0024] According to some embodiments of this application, the second wall portion has a second surface facing the second layer of battery cells, the second surface is provided with a second through hole, the second through hole communicates with the second collection cavity, and the second through hole is correspondingly provided with the second pressure relief mechanism.

[0025] In the above scheme, the second through hole facilitates the discharge from the second pressure relief mechanism to enter the second collection chamber, further reducing the impact of the discharge on other battery cells.

[0026] According to some embodiments of this application, the battery further includes a housing, in which a first layer of battery cells and a second layer of battery cells are disposed; the housing includes an isolation component, which is located between the first layer of battery cells and the second layer of battery cells along a first direction, wherein the first layer of battery cells is connected to the isolation component, the second layer of battery cells is connected to the isolation component, and the isolation component carries the first layer of battery cells and the second layer of battery cells.

[0027] In the above scheme, the isolation component can separate the first layer of battery cells and the second layer of battery cells; the isolation component carries the first layer of battery cells and the second layer of battery cells, and the gravity of the first layer of battery cells and the second layer of battery cells are both applied to the isolation component, so the isolation component provides the first layer of battery cells and the second layer of battery cells with a force to overcome gravity.

[0028] According to some embodiments of this application, the interior of the isolation component has a first flow channel for accommodating the heat exchange medium.

[0029] In the above scheme, the first flow channel is set up so that the first layer of battery cells and the second layer of battery cells share the same thermal management component, which can regulate the temperature of the first layer of battery cells and the second layer of battery cells, thereby improving the reliability of the battery.

[0030] According to some embodiments of this application, the first layer of battery cells includes a first battery cell group and a second battery cell group arranged at intervals along a second direction, the second direction being perpendicular to the first direction; the housing also includes a first partition member disposed on the isolation component, along the second direction, the first partition member being disposed between the first battery cell group and the second battery cell group.

[0031] In the above scheme, the setting of the first separator can improve the installation stability of the first battery cell group and the second battery cell group.

[0032] According to some embodiments of this application, along the second direction, the first pressure relief mechanism of the first battery cell group is disposed on the side of the first battery cell group opposite to the second battery cell group, and the first pressure relief mechanism of the second battery cell group is disposed on the side of the second battery cell group opposite to the first battery cell group.

[0033] In the above scheme, the first pressure relief mechanism of the first battery cell group and the first pressure relief mechanism of the second battery cell group are arranged opposite to each other in the second direction, which can reduce the impact of the pressure relief of the first pressure relief mechanism of the first battery cell group on the second battery cell group, and reduce the impact of the pressure relief of the first pressure relief mechanism of the second battery cell group on the first battery cell group.

[0034] According to some embodiments of this application, both the first battery cell group and the second battery cell group are connected to the first separator.

[0035] In the above scheme, the gravity of both the first battery cell group and the second battery cell group is applied to the first separator, and the first separator provides a force to overcome gravity for both the first battery cell group and the second battery cell group.

[0036] According to some embodiments of this application, a second flow channel for accommodating heat exchange medium is formed inside the first partition.

[0037] In the above scheme, the second flow channel is set up so that the first battery cell group and the second battery cell group share the same thermal management component, which can regulate the temperature of the first battery cell group and the second battery cell group, thereby improving the reliability of the battery.

[0038] According to some embodiments of this application, the first separator is integrally formed or welded to the isolation component.

[0039] In the above scheme, the first partition and the isolation component are integrally formed, which improves the structural strength. The first partition and the isolation component are welded together, which reduces the manufacturing difficulty.

[0040] According to some embodiments of this application, the housing further includes two first walls disposed opposite to each other along a second direction, the second direction being perpendicular to the first direction, a first layer of battery cells disposed between the two first walls, and an isolation component connecting the two first walls.

[0041] In the above scheme, the first layer of battery cells is disposed between the two first walls, which can protect the first layer of battery cells; the isolation component connects the two first walls, which can improve the assembly strength.

[0042] According to some embodiments of this application, the isolation component is integrally formed or welded to the two first wall portions.

[0043] In the above scheme, the isolation component is integrally formed with the two first walls, and the connection strength between the isolation component and the two first walls is high, which is beneficial to improving the structural stability of the battery. The isolation component is welded to the two first walls, which reduces the manufacturing difficulty.

[0044] According to some embodiments of this application, the battery further includes a first cover, which is connected to two first walls, and along a first direction, a first layer of battery cells is located between the first cover and the isolation component.

[0045] In the above scheme, the first cover is connected to two first walls to form a receiving space for accommodating the first layer of battery cells; at the same time, the assembly and maintenance of the first layer of battery cells can be achieved by disassembling the first cover, which helps to improve assembly efficiency and reduce maintenance costs.

[0046] According to some embodiments of this application, the second layer of battery cells includes a third battery cell group and a fourth battery cell group arranged at intervals along a second direction, the second direction being perpendicular to the first direction; the battery also includes a second separator disposed on the isolation component, along the second direction, the second separator being disposed between the third battery cell group and the fourth battery cell group.

[0047] In the above scheme, the setting of the second separator can improve the installation stability of the third and fourth battery cell groups.

[0048] According to some embodiments of this application, along the second direction, the second pressure relief mechanism of the third battery cell group is disposed on the side of the third battery cell group opposite to the fourth battery cell group, and the second pressure relief mechanism of the fourth battery cell group is disposed on the side of the fourth battery cell group opposite to the third battery cell group.

[0049] In the above scheme, the second pressure relief mechanism of the third battery cell group and the second pressure relief mechanism of the fourth battery cell group are arranged opposite to each other in the second direction, which can reduce the impact of the pressure relief of the second pressure relief mechanism of the third battery cell group on the fourth battery cell group, and reduce the impact of the pressure relief of the second pressure relief mechanism of the fourth battery cell group on the third battery cell group.

[0050] According to some embodiments of this application, both the third battery cell group and the fourth battery cell group are connected to the second separator.

[0051] In the above scheme, the gravity of both the third and fourth battery cell groups is applied to the second separator, which provides a force to overcome gravity for both the third and fourth battery cell groups.

[0052] According to some embodiments of this application, the interior of the second partition has a third flow channel for accommodating the heat exchange medium.

[0053] In the above scheme, the third flow channel is set up, and the third and fourth battery cell groups share the same thermal management component, which can regulate the temperature of the third and fourth battery cell groups and improve the reliability of the battery.

[0054] According to some embodiments of this application, the second separator is integrally formed or welded to the isolation component.

[0055] In the above scheme, the second partition and the isolation component are integrally formed, which improves the structural strength. The second partition and the isolation component are welded together, which reduces the manufacturing difficulty.

[0056] According to some embodiments of this application, the housing further includes two second walls disposed opposite to each other along a second direction, a second layer of battery cells disposed between the two second walls, and an isolation component connecting the two second walls.

[0057] In the above scheme, the second layer of battery cells is disposed between the two second walls, which can protect the second layer of battery cells; the isolation component connects the two second walls, which can improve the assembly strength.

[0058] According to some embodiments of this application, the isolation component is integrally formed or welded to the two second wall portions.

[0059] In the above design, the isolation component is integrally formed with the two second walls, resulting in high connection strength between the isolation component and the two second walls, which is beneficial for improving the structural stability of the battery. The isolation component is welded to the two second walls, making manufacturing relatively easy.

[0060] According to some embodiments of this application, the battery further includes a second cover connected to two second walls, and along a first direction, a second layer of battery cells is located between the second cover and the insulating component.

[0061] In the above scheme, the second cover is connected to two second walls to form a space for accommodating the second layer of battery cells; at the same time, the second layer of battery cells can be assembled and maintained by disassembling the second cover, which helps to improve assembly efficiency and reduce maintenance costs.

[0062] According to some embodiments of this application, the first direction is parallel to the direction of gravity.

[0063] In the above scheme, the first layer of battery cells and the second layer of battery cells are stacked along the first direction, which can make reasonable use of the space in the direction of gravity and improve the space utilization rate.

[0064] Secondly, embodiments of this application also provide an electrical device that includes the battery provided in any of the above embodiments.

[0065] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0066] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0067] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0068] Figure 2 Cross-sectional views of a battery provided for some embodiments of this application;

[0069] Figure 3 This is an exploded view of some structures provided in some embodiments of this application;

[0070] Figure 4 This is a schematic diagram of the structure of the box provided in some embodiments of this application;

[0071] Figure 5 This is a schematic diagram of the assembly of the first layer battery cell, the second layer battery cell, and the isolation component provided for some embodiments of this application;

[0072] Figure 6 This is an exploded view of the battery structure provided in some embodiments of this application.

[0073] Icons: 100 - Battery; 10 - First layer of battery cell; 10a - First battery cell group; 10b - Second battery cell group; 11 - First battery cell; 111 - First pressure relief mechanism; 112 - First electrode terminal; 20 - Second layer of battery cell; 20a - Third battery cell group; 20b - Fourth battery cell group; 21 - Second battery cell; 211 - Second pressure relief mechanism; 30 - Housing; 30a - First side wall; 30b - Second side wall; 31 - First wall portion; 311 - First collection chamber; 312 - First surface; 313 - First passage Hole; 314-First protrusion; 32-Second wall portion; 321-Second collecting cavity; 322-Second surface; 323-Second through hole; 324-Second protrusion; 33-Isolation component; 331-First flow channel; 34-First separator; 341-Second flow channel; 35-Second separator; 351-Third flow channel; 41-Third pressure relief mechanism; 42-Fourth pressure relief mechanism; 51-First cover; 52-Second cover; 200-Controller; 300-Motor; 1000-Vehicle; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0075] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0076] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0077] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0078] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0079] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0080] In some embodiments, the battery can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0081] In some embodiments, the battery can be a battery pack, which includes a battery case and individual battery cells, with the individual battery cells or battery modules housed in the battery case.

[0082] In some embodiments, the battery box may be part of the vehicle's chassis structure. For example, a portion of the battery box may be at least a part of the vehicle's floor, or a portion of the battery box may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0083] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0084] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0085] As an example, a battery cell can be a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0086] The battery cell includes a casing and a pressure relief mechanism. The pressure relief mechanism is located in the casing and is used to release the internal pressure and temperature of the casing.

[0087] A pressure relief mechanism is a component or part that can be actuated to release internal pressure or temperature. Pressure relief mechanisms can take the form of explosion-proof valves, gas valves, pressure relief valves, or safety valves, and can specifically employ pressure-sensitive or temperature-sensitive components or structures. That is, when the internal pressure or temperature of a battery cell reaches a predetermined threshold, the pressure relief mechanism actuates or a weak structure within the mechanism is damaged, thereby creating an opening or channel for the release of internal pressure or temperature.

[0088] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to, at least a portion of the mechanism rupturing, breaking, tearing, or opening. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0089] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0090] The development of battery technology must take into account multiple design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters. In addition, battery reliability also needs to be considered.

[0091] In some embodiments, to improve battery energy density, batteries typically incorporate multiple individual cells, for example, multiple layers of cells within a battery case. When multiple layers of cells are stacked, the pressure relief mechanism for each cell is usually located at one end of the cell in the stacking direction, facing the adjacent cell layer. The orientation of the pressure relief mechanism is parallel to the stacking direction, and when activated, the released material is sprayed towards the adjacent cell layer. In this configuration, because the pressure relief mechanism is parallel to the stacking direction, when a cell experiences thermal runaway, the released material sprayed towards the adjacent cell layer can easily affect the adjacent cells, leading to heat propagation and lower battery reliability.

[0092] To reduce the risk of thermal propagation between adjacent battery cells due to emissions from the pressure relief mechanism, this application provides a battery comprising a first layer of battery cells and a second layer of battery cells, stacked along a first direction. The first layer of battery cells includes multiple first battery cells, each equipped with a first pressure relief mechanism. The second layer of battery cells includes multiple second battery cells, each equipped with a second pressure relief mechanism. The orientations of both the first and second pressure relief mechanisms are angled to the first direction, which improves battery reliability.

[0093] In such a battery, since the orientation of the first pressure relief mechanism is set at an angle to the first direction, when the first pressure relief mechanism is actuated, the emissions released by the first pressure relief mechanism are unlikely to affect the second battery cell. Similarly, since the orientation of the second pressure relief mechanism is set at an angle to the first direction, when the second pressure relief mechanism is actuated, the emissions released by the second pressure relief mechanism are unlikely to affect the first battery cell. This reduces the risk of thermal propagation when the battery cell experiences thermal runaway, thereby making the battery more reliable.

[0094] The batteries disclosed in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using batteries disclosed in this application.

[0095] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

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

[0097] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0098] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0099] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0100] Please refer to Figure 2 , Figure 2 Cross-sectional views of batteries provided in some embodiments of this application. Figure 3 This is an exploded view of some structures provided in some embodiments of this application. Figure 4 This is a schematic diagram of the structure of a housing provided in some embodiments of this application. Embodiments of this application provide a battery 100, which includes a first layer of battery cells 10 and a second layer of battery cells 20. The first layer of battery cells 10 and the second layer of battery cells 20 are stacked along a first direction X. The first layer of battery cells 10 includes a plurality of first battery cells 11, each first battery cell 11 being provided with a first pressure relief mechanism 111. The second layer of battery cells 20 includes a plurality of second battery cells 21, each second battery cell 21 being provided with a second pressure relief mechanism 211. The orientations of both the first pressure relief mechanism 111 and the second pressure relief mechanism 211 are set at an angle to the first direction X.

[0101] The first layer of battery cells 10 and the second layer of battery cells 20 are stacked along a first direction X, which can be the first layer of battery cells 10 and the second layer of battery cells 20 being stacked along the direction of gravity. The first direction X can be parallel to the direction of gravity, or the first direction X can form a certain angle with the direction of gravity. In some embodiments, when the first layer of battery cells 10 and the second layer of battery cells 20 are stacked along the direction of gravity, the space inside the battery 100 in the direction of gravity can be reasonably utilized.

[0102] The first direction X is bidirectional. Taking the first direction X as parallel to the direction of gravity as an example, the first layer of battery cells 10 and the second layer of battery cells 20 are stacked along the first direction X. The first layer of battery cells 10 can be located above the second layer of battery cells 20, or the second layer of battery cells 20 can be located above the first layer of battery cells 10.

[0103] The first pressure relief mechanism 111 is unidirectional, and its orientation can be understood as being perpendicular to the plane in which it is located. The second pressure relief mechanism 211 is also unidirectional, and its orientation can be understood as being perpendicular to the plane in which it is located.

[0104] The first pressure relief mechanism 111 is oriented at an angle to the first direction X. The orientation of the first pressure relief mechanism 111 is not parallel to the first direction X; it is tilted relative to the first direction X. When the first pressure relief mechanism 111 releases emissions, the emissions are less likely to affect the second battery cell 21. Similarly, the second pressure relief mechanism 211 is oriented at an angle to the first direction X. The orientation of the second pressure relief mechanism 211 is not parallel to the first direction X; it is tilted relative to the first direction X. When the second pressure relief mechanism 211 releases emissions, the emissions are less likely to affect the first battery cell 11.

[0105] Multiple first battery cells 11 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple first battery cells 11 can be connected in both series and parallel.

[0106] Multiple second battery cells 21 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple second battery cells 21 can be connected in both series and parallel.

[0107] The first battery cell 11 and the second battery cell 21 can be a secondary battery 100 or a primary battery 100; the first battery cell 11 and the second battery cell 21 can also be a lithium-sulfur battery 100, a sodium-ion battery 100 or a magnesium-ion battery 100, but are not limited to these.

[0108] In some embodiments, the first battery cell 11 includes a first electrode terminal. The first electrode terminal may be disposed at the same end of the first battery cell 11 as the first pressure relief mechanism 111. Alternatively, the first electrode terminal may be disposed at different ends of the first battery cell 11 as the first pressure relief mechanism 111, such as adjacent ends or opposite ends.

[0109] In some embodiments, the second battery cell 21 includes a second electrode terminal. The second electrode terminal may be disposed at the same end of the second battery cell 21 as the second pressure relief mechanism 211, or the second electrode terminal may be disposed at different ends of the second battery cell 21 as the second pressure relief mechanism 211, for example, adjacent ends or opposite ends.

[0110] The structure of the first battery cell 11 may be the same as or different from that of the second battery cell 21.

[0111] The battery 100 also includes a first busbar and a second busbar. The first busbar is used to realize the electrical connection of two first battery cells 11, and the second busbar is used to realize the electrical connection of two second battery cells 21.

[0112] In some embodiments, the battery 100 further includes a housing, in which the first layer of battery cells 10 and the second layer of battery cells 20 are both disposed. The first pressure relief mechanism 111 and the second pressure relief mechanism 211 may face the wall of the housing at the same end in the second direction Y. For example, the orientation of the first pressure relief mechanism 111 may be the same as the orientation of the second pressure relief mechanism 211. Alternatively, the first pressure relief mechanism 111 and the second pressure relief mechanism 211 may face the walls of opposite ends in the second direction Y. For example, the orientation of the first pressure relief mechanism 111 may be opposite to the orientation of the second pressure relief mechanism 211.

[0113] According to the battery 100 of the present application embodiment, the first layer of battery cells 10 and the second layer of battery cells 20 are stacked along the first direction X, which can improve the space utilization rate inside the battery 100 in the first direction X, so as to improve the energy density of the battery 100. The orientation of the first pressure relief mechanism 111 and the orientation of the second pressure relief mechanism 211 are both set at an angle to the first direction, so that when the first pressure relief mechanism 111 is actuated or the second pressure relief mechanism 211 is actuated, the emissions emitted by the first pressure relief mechanism 111 are unlikely to affect the second battery cell 21, or the emissions emitted by the second pressure relief mechanism 211 are unlikely to affect the first battery cell 11. This can reduce the risk of thermal propagation when the battery 100 cells are thermally runaway, so that the battery 100 has high reliability.

[0114] According to some embodiments of this application, a first pressure relief mechanism 111 is disposed at one end of the first battery cell 11 in the second direction Y; a second pressure relief mechanism 211 is disposed at one end of the second battery cell 21 in the second direction Y, wherein the second direction Y is perpendicular to the first direction X.

[0115] The second direction Y is bidirectional. "The first pressure relief mechanism 111 is disposed at one end of the first battery cell 11 in the second direction Y" means that the first pressure relief mechanism 111 is disposed at one of the two opposite ends of the first battery cell 11 in the second direction Y. For example, taking the second direction Y as a horizontal direction, the first pressure relief mechanism 111 can be disposed at the left end of the first battery cell 11 in the second direction Y, or the first pressure relief mechanism 111 can be disposed at the right end of the first battery cell 11 in the second direction Y. Similarly, the second pressure relief mechanism 211 is disposed at one of the two opposite ends of the second battery cell 21 in the second direction Y.

[0116] The second direction Y is perpendicular to the first direction X. The first pressure relief mechanism 111 is not positioned toward the second battery cell 21, and the second pressure relief mechanism 211 is not positioned toward the first battery cell 11. When the first pressure relief mechanism 111 is actuated to release the emissions, the emissions are not likely to spray toward the second battery cell 21. At the same time, when the second pressure relief mechanism 211 is actuated to release the emissions, the emissions are not likely to spray toward the first battery cell 11.

[0117] In the above scheme, the first pressure relief mechanism 111 is disposed at one end of the first battery cell 11 in the second direction Y. When the first pressure relief mechanism 111 is actuated, the discharged emissions are unlikely to be directed toward the second battery cell 21, thereby reducing the impact of the emissions on the second battery cell 21 and reducing the risk of thermal propagation in the event of thermal runaway of the battery cell. The second pressure relief mechanism 211 is disposed at one end of the second battery cell 21 in the second direction Y. When the second pressure relief mechanism 211 is actuated, the discharged emissions are unlikely to be directed toward the first battery cell 11, thereby reducing the impact of the emissions on the first battery cell 11 and reducing the risk of thermal propagation in the event of thermal runaway of the battery cell.

[0118] According to some embodiments of this application, the orientation of the first pressure relief mechanism 111 and the orientation of the second pressure relief mechanism 211 are both parallel to the second direction Y.

[0119] The orientation of the first pressure relief mechanism 111 is parallel to the second direction Y, that is, the orientation of the first pressure relief mechanism 111 is perpendicular to the first direction X. When the first pressure relief mechanism 111 is actuated, the discharged material can be sprayed along the second direction Y, and the material is not easily sprayed toward the second battery cell 21.

[0120] The orientation of the second pressure relief mechanism 211 is parallel to the second direction Y, that is, the orientation of the second pressure relief mechanism 211 is perpendicular to the first direction X. When the second pressure relief mechanism 211 is actuated, the discharged material can be sprayed along the second direction Y, and the material is not easily sprayed toward the first battery cell 11.

[0121] In the above scheme, the orientation of the first pressure relief mechanism 111 is perpendicular to the first direction X. When the first pressure relief mechanism 111 is actuated, the discharged emissions are unlikely to affect the second battery cell 21, thereby reducing the impact of emissions on the second battery cell 21, thus reducing the risk of heat spread and improving the reliability of the battery 100. The orientation of the second pressure relief mechanism 211 is perpendicular to the first direction X. When the second pressure relief mechanism 211 is actuated, the discharged emissions are unlikely to affect the first battery cell 11, thereby reducing the impact of emissions on the first battery cell 11, thus reducing the risk of heat spread and improving the reliability of the battery 100.

[0122] Please refer to Figures 2 to 4 According to some embodiments of this application, the battery 100 further includes a housing 30, in which a first layer of battery cells 10 and a second layer of battery cells 20 are disposed. The housing 30 includes a first wall portion 31, which is disposed opposite to a first pressure relief mechanism 111 along a second direction Y. A first collection chamber 311 is formed inside the first wall portion 31, which is used to collect the emissions from the first battery cells 11 when the first pressure relief mechanism 111 is actuated.

[0123] The first wall portion 31 has a hollow structure, so that a first collection cavity 311 is formed inside the first wall portion 31. On the one hand, it can collect the emissions released when the first pressure relief mechanism 111 is actuated, and on the other hand, it can reduce the weight of the box 30.

[0124] Along the second direction Y, the first wall portion 31 is disposed opposite to the first pressure relief mechanism 111. When the first pressure relief mechanism 111 is actuated, the discharge released by the first pressure relief mechanism 111 is sprayed toward the first wall portion 31. The first wall portion 31 may be provided with weak parts (such as grooves, thinning areas, etc.). When the first pressure relief mechanism 111 is actuated, the discharge released by the first pressure relief mechanism 111 can damage the weak parts and enter the first collection chamber 311.

[0125] In the above scheme, the first wall portion 31 is arranged opposite to the first pressure relief mechanism 111. When the first pressure relief mechanism 111 is actuated, the emissions discharged by the first pressure relief mechanism 111 can be collected by the first collection chamber 311, reducing the impact of the emissions on other battery cells 100.

[0126] Please refer to Figure 3 and Figure 4 According to some embodiments of this application, the battery 100 further includes a third pressure relief mechanism 41, which is disposed on the first wall portion 31 and is used to release the emissions in the first collection chamber 311.

[0127] In some embodiments, a third pressure relief mechanism 41 is disposed on the outer side of the first wall portion 31, the outer side of the first wall portion 31 being the side of the first wall portion 31 facing away from the first layer of battery cell 10, so as to release emissions when the third pressure relief mechanism 41 is actuated.

[0128] In the above scheme, the third pressure relief mechanism 41 can release the emissions in the first collection chamber 311, reduce the internal pressure of the first collection chamber 311, and improve the reliability of the battery 100.

[0129] Please refer to Figure 3 and Figure 4 According to some embodiments of this application, the first wall portion 31 has a first surface 312 facing the first layer of battery cell 10, the first surface 312 is provided with a first through hole 313, the first through hole 313 communicates with the first collection cavity 311, and the first through hole 313 is correspondingly provided with the first pressure relief mechanism 111.

[0130] The first wall portion 31 and other walls form a space for accommodating the first layer of battery cells 10. The first through hole 313 connects the first collection chamber 311 and the space. When the first pressure relief mechanism 111 releases the discharge, the discharge can enter the first collection chamber 311 through the first through hole 313 and be collected by the first collection chamber 311.

[0131] The first through hole 313 can be configured to correspond to one first pressure relief mechanism 111, or the first through hole 313 can be configured to correspond to multiple first pressure relief mechanisms 111. For example, there can be multiple first through holes 313, with each first through hole 313 corresponding to one first pressure relief mechanism 111; or there can be one first through hole 313, with one first through hole 313 corresponding to multiple first pressure relief mechanisms 111.

[0132] In some embodiments, a first pressure relief mechanism 111 corresponds to a first through hole 313 to reduce the risk of thermal runaway propagation, thereby making the battery 100 more reliable.

[0133] In some embodiments, when the first electrode terminal 112 of the first battery cell 11 is disposed toward the first surface 312, a first protrusion 314 may be formed on the first surface 312, and a first through hole 313 is disposed on the first protrusion 314, thereby making reasonable use of the space in the second direction Y.

[0134] In the above scheme, the first through hole 313 is provided so that the emissions released by the first pressure relief mechanism 111 can enter the first collection chamber 311, further reducing the impact of the emissions on other battery cells 100.

[0135] Please refer to Figure 3 and Figure 4According to some embodiments of this application, the housing 30 further includes a second wall portion 32, which is disposed opposite to the second pressure relief mechanism 211 along the second direction Y. A second collection chamber 321 is formed inside the second wall portion 32, which is used to collect the emissions of the second battery cell 21 when the second pressure relief mechanism 211 is actuated.

[0136] In some embodiments, the second wall portion 32 and the first wall portion 31 may be located at both ends of the housing 30 in the second direction Y.

[0137] The second wall portion 32 has a hollow structure, so that a second collection cavity 321 is formed inside the second wall portion 32. On the one hand, it can collect the emissions released when the second pressure relief mechanism 211 is actuated, and on the other hand, it can reduce the weight of the box 30.

[0138] Along the second direction Y, the second wall portion 32 is disposed opposite to the second pressure relief mechanism 211. When the second pressure relief mechanism 211 is actuated, the discharge released by the second pressure relief mechanism 211 is sprayed toward the second wall portion 32. The second wall portion 32 may be provided with weak parts (such as grooves, thinning areas, etc.). When the second pressure relief mechanism 211 is actuated, the discharge released by the second pressure relief mechanism 211 can damage the weak parts and enter the second collection chamber 321.

[0139] In the above scheme, the second wall portion 32 is arranged opposite to the second pressure relief mechanism 211. When the second pressure relief mechanism 211 is actuated, the emissions discharged by the second pressure relief mechanism 211 can be collected by the second collection chamber 321, reducing the impact of the emissions on other battery cells 100.

[0140] In some embodiments, the second wall portion 32 and the first wall portion 31 are located at the same end of the housing 30 in the second direction Y, and the second wall portion 32 is connected to the first wall.

[0141] According to some embodiments of this application, the second wall portion 32 is integrally formed with the first wall portion 31.

[0142] The second wall portion 32 and the first wall portion 31 can be integrally extruded or injection molded.

[0143] In the above scheme, the second wall portion 32 is integrally formed with the first wall portion 31, which facilitates processing and manufacturing.

[0144] Please refer to Figure 3 and Figure 4 According to some embodiments of this application, the battery 100 further includes a fourth pressure relief mechanism 42, which is disposed on the second wall portion 32 and is used to release emissions from the second collection chamber 321.

[0145] In some embodiments, the fourth pressure relief mechanism 42 is disposed on the outer side of the second wall portion 32, the outer side of the second wall portion 32 being the side of the second wall portion 32 facing away from the second layer of battery cell 20, so as to release emissions when the fourth pressure relief mechanism 42 is actuated.

[0146] In the above scheme, the fourth pressure relief mechanism 42 can release the emissions in the second collection chamber 321, reduce the internal pressure of the second collection chamber 321, and improve the reliability of the battery 100.

[0147] Please refer to Figure 3 and Figure 4 According to some embodiments of this application, the second wall portion 32 has a second surface 322 facing the second layer battery cell 20, the second surface 322 is provided with a second through hole 323, the second through hole 323 communicates with the second collection cavity 321, and the second through hole 323 is correspondingly provided with the second pressure relief mechanism 211.

[0148] The second wall portion 32 and other walls form a space for accommodating the second layer of battery cells 20. The second through hole 323 connects the second collection chamber 321 and the space. When the second pressure relief mechanism 211 releases the discharge, the discharge can enter the second collection chamber 321 through the second through hole 323 and be collected by the second collection chamber 321.

[0149] The second through hole 323 can be configured to correspond to one second pressure relief mechanism 211, or the second through hole 323 can be configured to correspond to multiple second pressure relief mechanisms 211. For example, there can be multiple second through holes 323, with each second through hole 323 corresponding to one second pressure relief mechanism 211; or there can be one second through hole 323, with one second through hole 323 corresponding to multiple second pressure relief mechanisms 211.

[0150] In some embodiments, a second pressure relief mechanism 211 corresponds to a second through hole 323 to reduce the risk of thermal runaway propagation, thereby making the battery 100 more reliable.

[0151] In some embodiments, when the second electrode terminal of the second battery cell 21 is disposed toward the second surface 322, a second protrusion 324 may be formed on the second surface 322, and a second through hole 323 is disposed on the second protrusion 324, thereby making reasonable use of the space in the second direction.

[0152] In the above scheme, the second through hole 323 is provided so that the emissions released by the second pressure relief mechanism 211 can enter the second collection chamber 321, further reducing the impact of the emissions on other battery cells 100.

[0153] Please refer to Figure 3 and Figure 4 and further refer to Figure 5, Figure 5 This is a schematic diagram illustrating the assembly of the first layer of battery cells, the second layer of battery cells, and the isolation component according to some embodiments of this application. According to some embodiments of this application, the battery 100 further includes a housing 30, within which the first layer of battery cells 10 and the second layer of battery cells 20 are disposed. The housing 30 includes an isolation component 33, located between the first layer of battery cells 10 and the second layer of battery cells 20 along a first direction X. The first layer of battery cells 10 is connected to the isolation component 33, and the second layer of battery cells 20 is also connected to the isolation component 33. The isolation component 33 carries the first layer of battery cells 10 and the second layer of battery cells 20.

[0154] The housing 30 has a storage space, in which the first layer of battery cells 10 and the second layer of battery cells 20 are both housed.

[0155] The isolation component 33 is used to isolate the first layer of battery cells 10 and the second layer of battery cells 20 in the first direction X. The isolation component 33 can divide the internal accommodating space of the housing 30 into two chambers, with the first layer of battery cells 10 and the second layer of battery cells 20 located in the two chambers respectively.

[0156] In some embodiments, the isolation component 33 can isolate the first layer battery cell 10 and the second layer battery cell 20 into two independent chambers, thereby reducing the impact of the emissions released by the first pressure relief mechanism 111 of the first layer battery cell 10 on the second layer battery cell 20, or reducing the impact of the emissions released by the second pressure relief mechanism 211 of the second layer battery cell 20 on the first layer battery cell 10.

[0157] "The isolation component 33 carries the first layer of battery cell 10 and the second layer of battery cell 20" means that the weight of the first layer of battery cell 10 and the second layer of battery cell 20 are both applied to the isolation component 33.

[0158] The material of the isolation component 33 can be various, such as copper, iron, aluminum, steel, aluminum alloy, plastic, etc.

[0159] In the above scheme, the isolation component 33 can separate the first layer of battery cell 10 and the second layer of battery cell 20; the isolation component 33 carries the first layer of battery cell 10 and the second layer of battery cell 20, and the gravity of the first layer of battery cell 10 and the second layer of battery cell 20 is applied to the isolation component 33, and the isolation component 33 provides the first layer of battery cell 10 and the second layer of battery cell 20 with a force to overcome gravity.

[0160] Please refer to Figure 5 According to some embodiments of this application, the interior of the isolation component 33 has a first flow channel 331 for accommodating the heat exchange medium.

[0161] The heat exchange medium can be a cooling medium or a cooling fluid, such as water, a mixture of water and ethylene glycol, or air. The heat exchange medium can regulate temperature; for example, it can heat or cool individual battery cells.

[0162] In some embodiments, the heat exchange medium within the first flow channel 331 can be circulated to achieve better temperature regulation. For example, the first flow channel 331 can be provided with two openings: one opening is the heat exchange medium inlet, and the other opening is the heat exchange medium outlet. The two openings are respectively connected to an external heat exchange medium circulation system, thereby realizing the circulation of the heat exchange medium within the first flow channel 331.

[0163] The isolation component 33 can be a hollow structure so as to form a first flow channel 331 inside the isolation component 33.

[0164] In the above scheme, the first flow channel 331 is set up so that the first layer of battery cell 10 and the second layer of battery cell 20 share the same thermal management component, which can adjust the temperature of the first layer of battery cell 10 and the second layer of battery cell 20, thereby improving the reliability of battery 100.

[0165] Please refer to Figure 2 , Figure 3 and Figure 5 According to some embodiments of this application, the first layer of battery cells 10 includes a first battery cell group 10a and a second battery cell group 10b arranged at intervals along a second direction Y, where the second direction Y is perpendicular to the first direction X. The housing 30 also includes a first partition 34, which is disposed on the isolation member 33 and positioned between the first battery cell group 10a and the second battery cell group 10b along the second direction Y.

[0166] The first battery cell group 10a and the second battery cell group 10b may each include a plurality of first battery cells 11. In the first battery cell group 10a, the plurality of first battery cells 11 may be stacked along a third direction, with the third direction, the second direction Y, and the first direction X being perpendicular to each other. In the second battery cell group 10b, a plurality of second battery cells 21 may be stacked along a third direction.

[0167] The first separator 34 is a component used to separate the first battery cell group 10a and the second battery cell group 10b in the second direction Y.

[0168] The first separator 34 is connected to the isolation component 33, for example, by bonding, welding, or integral molding the first separator 34 and the isolation component 33.

[0169] In the above scheme, the setting of the first separator 34 can improve the installation stability of the first battery cell group 10a and the second battery cell group 10b.

[0170] Please refer to Figure 5 According to some embodiments of this application, along the second direction Y, the first pressure relief mechanism 111 of the first battery cell group 10a is disposed on the side of the first battery cell group 10a away from the second battery cell group 10b, and the first pressure relief mechanism 111 of the second battery cell group 10b is disposed on the side of the second battery cell group 10b away from the first battery cell group 10a.

[0171] The discharge direction of the first pressure relief mechanism 111 of the first battery cell group 10a is opposite to that of the first pressure relief mechanism 111 of the second battery cell group 10b.

[0172] In the above scheme, the first pressure relief mechanism 111 of the first battery cell group 10a and the first pressure relief mechanism 111 of the second battery cell group 10b are arranged opposite to each other in the second direction Y, which can reduce the impact of the pressure relief of the first pressure relief mechanism 111 of the first battery cell group 10a on the second battery cell group 10b, and reduce the impact of the pressure relief of the first pressure relief mechanism 111 of the second battery cell group 10b on the first battery cell group 10a.

[0173] According to some embodiments of this application, both the first battery cell group 10a and the second battery cell group 10b are connected to the first separator 34.

[0174] The connection method between the first battery cell group 10a and the first separator 34 can be bonding, welding, etc. The connection method between the second battery cell group 10b and the first separator 34 can be bonding, welding, etc.

[0175] In the above scheme, the gravity of the first battery cell group 10a and the second battery cell group 10b is applied to the first separator 34, and the first separator 34 provides the first battery cell group 10a and the second battery cell group 10b with a force to overcome gravity.

[0176] Please refer to Figure 4 and Figure 5 According to some embodiments of this application, the interior of the first partition 34 is formed with a second flow channel 341 for accommodating the heat exchange medium.

[0177] The heat exchange medium in the second flow channel 341 can be the same as the heat exchange medium in the first flow channel 331.

[0178] The heat exchange medium located in the second flow channel 341 can be circulated to achieve better temperature regulation. For example, the second flow channel 341 can be provided with two openings, one for the heat exchange medium inlet and the other for the heat exchange medium outlet. The two openings are respectively connected to an external heat exchange medium circulation system so that the heat exchange medium circulates within the second flow channel 341.

[0179] In some embodiments, the second flow channel 341 may be connected to the first flow channel 331.

[0180] In the above scheme, the second flow channel 341 is provided so that the first battery cell group 10a and the second battery cell group 10b share a thermal management component, which can regulate the temperature of the first battery cell group 10a and the second battery cell group 10b, thereby improving the reliability of the battery 100.

[0181] According to some embodiments of this application, the first separator 34 and the isolation component 33 are integrally formed or welded together.

[0182] The first separator 34 and the isolation component 33 can be integrally extruded or injection molded.

[0183] In the above scheme, the first partition 34 and the isolation component 33 are integrally formed, which can improve the structural strength. The first partition 34 and the isolation component 33 are welded together, which reduces the manufacturing difficulty.

[0184] Please refer to Figure 4 According to some embodiments of this application, the housing 30 further includes two first wall portions 31 disposed opposite to each other along a second direction Y, the second direction Y being perpendicular to the first direction X, the first layer of battery cells 10 being disposed between the two first wall portions 31, and the isolation component 33 connecting the two first wall portions 31.

[0185] Two first wall portions 31 are arranged opposite each other in the second direction Y. The two first wall portions 31 and the isolation member 33 enclose a space for accommodating the first layer of battery cells 10. An opening is formed at the end of the first wall portion 31 away from the isolation member 33 in the first direction X, so that the first layer of battery cells 10 can enter the space.

[0186] In the above scheme, the first layer of battery cell 10 is disposed between the two first wall portions 31, and the two first wall portions 31 can protect the first layer of battery cell 10; the isolation component 33 connects the two first wall portions 31, which can improve the assembly strength.

[0187] According to some embodiments of this application, the isolation component 33 is integrally formed or welded to the two first wall portions 31.

[0188] The isolation component 33 and the two first wall portions 31 can be integrally extruded or injection molded.

[0189] In the above scheme, the isolation component 33 is integrally formed with the two first wall portions 31, and the isolation component 33 and the two first wall portions 31 have high connection strength, which is beneficial to improving the structural stability of the battery 100. The isolation component 33 is welded to the two first wall portions 31, which reduces the manufacturing difficulty.

[0190] Please refer to Figure 2 and Figure 3 According to some embodiments of this application, the battery 100 further includes a first cover 51, which is connected to two first wall portions 31. Along the first direction X, the first layer of battery cells 10 is located between the first cover 51 and the isolation member 33.

[0191] The first cover 51 can be constructed as a cover structure with one side open, or it can be constructed as a flat plate.

[0192] The first cover 51, the two first walls 31 and the isolation component 33 enclose a space for accommodating the first layer of battery cells 10. The first cover 51 can protect the first layer of battery cells 10.

[0193] In the above scheme, the first cover 51 is connected to the two first wall portions 31 to form a receiving space for accommodating the first layer of battery cells 10; at the same time, by disassembling the first cover 51, the assembly and maintenance of the first layer of battery cells 10 can be realized, which helps to improve assembly efficiency and reduce maintenance costs.

[0194] Please refer to Figure 3 and Figure 5 According to some embodiments of this application, the second layer of battery cells 20 includes a third battery cell group 20a and a fourth battery cell group 20b arranged at intervals along a second direction Y, where the second direction Y is perpendicular to the first direction X. The battery 100 also includes a second separator 35, which is disposed on the isolation member 33 and positioned between the third battery cell group 20a and the fourth battery cell group 20b along the second direction Y.

[0195] The third battery cell group 20a and the fourth battery cell group 20b may each include a plurality of second battery cells 21. In the third battery cell group 20a, the plurality of second battery cells 21 may be stacked along a third direction. In the fourth battery cell group 20b, the plurality of second battery cells 21 may be stacked along a third direction.

[0196] The second separator 35 is a component used to separate the third battery cell group 20a and the fourth battery cell group 20b in the second direction Y.

[0197] The first separator 34 is connected to the isolation component 33, for example, by bonding, welding, or integral molding the first separator 34 and the isolation component 33.

[0198] In the above scheme, the setting of the second separator 35 can improve the installation stability of the third battery cell group 20a and the fourth battery cell group 20b.

[0199] Please refer to Figure 5According to some embodiments of this application, along the second direction Y, the second pressure relief mechanism 211 of the third battery cell group 20a is disposed on the side of the third battery cell group 20a away from the fourth battery cell group 20b, and the second pressure relief mechanism 211 of the fourth battery cell group 20b is disposed on the side of the fourth battery cell group 20b away from the third battery cell group 20a.

[0200] The discharge direction of the second pressure relief mechanism 211 of the third battery cell group 20a is opposite to that of the second pressure relief mechanism 211 of the fourth battery cell group 20b.

[0201] In the above scheme, the second pressure relief mechanism 211 of the third battery cell group 20a and the second pressure relief mechanism 211 of the fourth battery cell group 20b are arranged opposite to each other in the second direction Y, which can reduce the impact of the pressure relief of the second pressure relief mechanism 211 of the third battery cell group 20a on the fourth battery cell group 20b, and reduce the impact of the pressure relief of the second pressure relief mechanism 211 of the fourth battery cell group 20b on the third battery cell group 20a.

[0202] According to some embodiments of this application, the third battery cell group 20a and the fourth battery cell group 20b are both connected to the second separator 35.

[0203] The connection method for the third battery cell group 20a and the second separator 35 can be bonding, welding, etc. The connection method for the fourth battery cell group 20b and the second separator 35 can be bonding, welding, etc.

[0204] The second separator 35 can carry the third battery cell group 20a and the fourth battery cell group 20b.

[0205] In the above scheme, the gravity of the third battery cell group 20a and the fourth battery cell group 20b is applied to the second separator 35, and the second separator 35 provides the third battery cell group 20a and the fourth battery cell group 20b with a force to overcome gravity.

[0206] Please refer to Figure 4 and Figure 5 According to some embodiments of this application, the interior of the second partition 35 is formed with a third flow channel 351 for accommodating the heat exchange medium.

[0207] The heat exchange medium in the third flow channel 351 can be the same as the heat exchange medium in the first flow channel 331.

[0208] The heat exchange medium located in the third flow channel 351 can be circulated to achieve better temperature regulation. For example, the third flow channel 351 is provided with two openings, one for the heat exchange medium inlet and the other for the heat exchange medium outlet. The two openings are respectively connected to an external heat exchange medium circulation system so that the heat exchange medium circulates within the third flow channel 351.

[0209] In some embodiments, the third flow channel 351 may be connected to the first flow channel 331.

[0210] In the above scheme, the third flow channel 351 is set up so that the third battery cell group 20a and the fourth battery cell group 20b share a thermal management component, which can regulate the temperature of the third battery cell group 20a and the fourth battery cell group 20b, thereby improving the reliability of the battery 100.

[0211] According to some embodiments of this application, the second separator 35 is integrally formed or welded to the isolation component 33.

[0212] The second separator 35 and the isolation component 33 can be integrally extruded or injection molded.

[0213] In the above scheme, the second partition 35 and the isolation component 33 are integrally formed, which can improve the structural strength. The second partition 35 and the isolation component 33 are welded together, which reduces the manufacturing difficulty.

[0214] Please refer to Figure 3 and Figure 4 According to some embodiments of this application, the housing 30 further includes two second wall portions 32 disposed opposite to each other along the second direction Y, the second layer of battery cells 20 is disposed between the two second wall portions 32, and the isolation member 33 connects the two second wall portions 32.

[0215] Two second wall portions 32 are arranged opposite each other in the second direction Y. The two second wall portions 32 and the isolation member 33 enclose a space for accommodating the second layer of battery cell 20. An opening is formed at the end of the second wall portion 32 away from the isolation member 33 in the first direction X, so that the second layer of battery cell 20 can enter the space.

[0216] In some embodiments, the isolation member 33 is located at one end of the first wall portion 31 near the second wall portion 32, and at the same time, the isolation member 33 is located at one end of the second wall portion 32 near the first wall portion 31. That is, the isolation member 33 connects the adjacent first wall portion 31 and second wall portion 32.

[0217] In the above scheme, the second layer of battery cell 20 is disposed between the two second wall portions 32, and the two second wall portions 32 can protect the second layer of battery cell 20; the isolation component 33 connects the two second wall portions 32, which can improve the assembly strength.

[0218] According to some embodiments of this application, the isolation component 33 is integrally formed or welded to the two second wall portions 32.

[0219] The isolation component 33 and the two second wall portions 32 can be integrally extruded or injection molded.

[0220] In the above scheme, the isolation component 33 is integrally formed with the two second wall portions 32, and the connection strength between the isolation component 33 and the two second wall portions 32 is high, which is beneficial to improving the structural stability of the battery 100. The isolation component 33 is welded to the two second wall portions 32, which reduces the manufacturing difficulty.

[0221] Please refer to Figure 2 and Figure 3 According to some embodiments of this application, the battery 100 further includes a second cover 52, which is connected to two second wall portions 32. Along the first direction X, the second layer of battery cells 20 is located between the second cover 52 and the isolation member 33.

[0222] The second cover 52 can be constructed as a cover structure with one side open, or it can be constructed as a flat plate.

[0223] The second cover 52, the two second walls 32 and the isolation component 33 enclose a space for accommodating the second layer of battery cells 20. The second cover 52 can protect the second layer of battery cells 20.

[0224] In the above scheme, the second cover 52 is connected to the two second wall portions 32 to form a receiving space for accommodating the second layer of battery cells 20; at the same time, by disassembling the second cover 52, the assembly and maintenance of the second layer of battery cells 20 can be realized, which helps to improve assembly efficiency and reduce maintenance costs.

[0225] Please refer to Figure 6 , Figure 6This is an exploded view of the battery structure provided in some embodiments of this application. According to some embodiments of this application, the housing 30 includes two first sidewalls 30a and two second sidewalls 30b. The two first sidewalls 30a are arranged opposite each other along a second direction Y, and the two second sidewalls 30b are arranged opposite each other along a third direction Z. The two ends of the first sidewalls 30a in the third direction Z are respectively connected to the two second sidewalls 30b. The two first sidewalls 30a and the two second sidewalls 30b define an accommodating space for accommodating a first layer of battery cells 10 and a second layer of battery cells 20. Each first sidewall 30a includes a first wall portion 31 and a second wall portion 32, which are distributed along a first direction. The first wall portion 31 corresponds to the first layer of battery cells 10, and the second wall portion 32 corresponds to the second layer of battery cells 20. An isolation member 33 connects the two first sidewalls 30a and the two second sidewalls 30b. The first cover 51 connects two first walls 31 and two second sidewalls 30b. The isolation member 33, the first cover 51, the two first walls 31, and the two second sidewalls 30b define a space for accommodating the first layer of battery cells 10. The second cover 52 connects two second walls 32 and two second sidewalls 30b. The isolation member 33, the second cover 52, the two second walls 32, and the two second sidewalls 30b define a space for accommodating the second layer of battery cells 20.

[0226] The third direction Z is bidirectional, with two second sidewalls 30b arranged opposite each other along the third direction Z. One second sidewall 30b is connected to one end of the first sidewall 30a in the third direction, and the other second sidewall 30b is connected to the other end of the first sidewall 30a in the third direction.

[0227] The enclosure 30 protects the first layer of battery cells 10 and the second layer of battery cells 20, improving the reliability of the battery 100.

[0228] According to some embodiments of this application, the first direction X is parallel to the direction of gravity.

[0229] In the above scheme, the first layer of battery cells 10 and the second layer of battery cells 20 are stacked along the first direction X, which can make reasonable use of the space in the direction of gravity and improve the space utilization rate.

[0230] In the above embodiments, the pressure relief mechanism mentioned can be any possible pressure relief mechanism, and the embodiments of this application are not limited to this. For example, the pressure relief mechanism can be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell equipped with the pressure relief mechanism reaches a threshold; for example, the pressure relief mechanism can be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal gas pressure of the battery cell equipped with the pressure relief mechanism reaches a threshold.

[0231] According to some embodiments of this application, this application also provides an electrical device that includes the battery 100 provided in any of the above embodiments.

[0232] Battery 100 is used to provide electrical energy.

[0233] The electrical equipment can be any of the systems or devices that use battery 100 as described above.

[0234] According to some embodiments of this application, please refer to Figures 2 to 6 This application provides a battery 100, which includes a first layer of battery cells 10 and a second layer of battery cells 20 stacked along a first direction X, the first direction X being parallel to the direction of gravity.

[0235] The first layer of battery cells 10 includes a first battery cell group 10a and a second battery cell group 100 arranged at intervals along the second direction Y. The first battery cell group 10a includes a plurality of first battery cells 11 stacked along the third direction, and the second battery cell group 10b includes a plurality of first battery cells 11 stacked along the third direction. The second layer of battery cells 20 includes a third battery cell group 20a and a fourth battery cell group 20b arranged at intervals along the second direction Y. The third battery cell group 20a includes a plurality of second battery cells 21 stacked along the third direction, and the fourth battery cell group 20b includes a plurality of second battery cells 21 stacked along the third direction.

[0236] The first pressure relief mechanism 111 of the first battery cell group 10a is disposed away from the second battery cell group 10b, and the first pressure relief mechanism 111 of the second battery cell group 10b is disposed away from the first battery cell group 10a. The second pressure relief mechanism 211 of the third battery cell group 20a is disposed away from the fourth battery cell group 20b, and the second pressure relief mechanism 211 of the fourth battery cell group 20b is disposed away from the third battery cell group 20a.

[0237] The battery 100 also includes a housing 30, a first cover 51, and a second cover 52. The housing 30 includes two first walls 31, two second walls 32, and an isolation component 33. The two first walls 31 are arranged opposite each other along a second direction Y, and the two second walls 32 are arranged opposite each other along a second direction Y. One first wall 31 and one second wall 32 correspond to each other and are integrally formed. The isolation component 33 connects the two first walls 31 and the two second walls 32. The first cover 51 connects the two first walls 31, and the second cover 52 connects the two second walls 32. The first cover 51, the isolation component 33, and the second cover 52 are spaced apart along a first direction X. The first layer of battery cells 10 is disposed within the space enclosed by the two first walls 31, the isolation component 33, and the first cover 51, and the second layer of battery cells 20 is disposed within the space enclosed by the two second walls 32, the isolation component 33, and the second cover 52.

[0238] A first collection chamber 311 is formed inside the first wall portion 31. The first wall portion 31 has a first surface 312 facing the first battery cell 10. The first surface 312 is provided with a first through hole 313, which communicates with the first collection chamber 311. The first through hole 313 is correspondingly provided with a first pressure relief mechanism 111. The battery 100 also includes a third pressure relief mechanism 41, which is disposed in the first wall portion 31 and is used to release the emissions in the first collection chamber 311.

[0239] The second wall portion 32 has a second collection chamber 321 formed inside it. The second wall portion 32 has a second surface 322 facing the second battery cell 20. The second surface 322 is provided with a second through hole 323, which communicates with the second collection chamber 321. The second through hole 323 is correspondingly provided with a second pressure relief mechanism 211. The battery 100 also includes a fourth pressure relief mechanism 42, which is provided in the second wall portion 32 and is used to release the emissions in the second collection chamber 321.

[0240] The battery 100 also includes a first separator 34 and a second separator 35. The first separator 34 is disposed on the isolation member 33 along the second direction Y and is disposed between the first battery cell group 10a and the second battery cell group 10b. The second separator 35 is disposed on the isolation member 33 along the second direction Y and is disposed between the third battery cell group 20a and the fourth battery cell group 20b.

[0241] The interior of the isolation component 33 forms a first flow channel 331 for containing the heat exchange medium, the interior of the first partition 34 forms a second flow channel 341 for containing the heat exchange medium, and the interior of the second partition 35 forms a third flow channel 351 for containing the heat exchange medium.

[0242] According to the battery 100 of this application embodiment, the first layer of battery cells 10 and the second layer of battery cells 20 share the heat exchange function of the isolation component 33, thereby improving the utilization rate of the isolation component 33; the first pressure relief mechanism 111 corresponds to the first through hole 313, and the second pressure relief mechanism 211 corresponds to the second through hole 323, which can reduce the risk of thermal runaway and improve the reliability of the battery 100. The first battery cell group 10a is connected to the isolation component 33 and the first separator 34, the second battery cell group 10b is connected to the isolation component 33 and the first separator 34, the third battery cell 100 is connected to the isolation component 33 and the second separator 35, and the fourth battery cell group 20b is connected to the isolation component 33 and the second separator 35, so that each battery cell group 100 has good cooling efficiency, which facilitates the improvement of the reliability of the battery 100.

[0243] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: The first layer of battery cells and the second layer of battery cells are stacked together along a first direction; The first layer of battery cells includes multiple first battery cells, and each first battery cell is provided with a first pressure relief mechanism; The second layer of battery cells includes multiple second battery cells, and each second battery cell is provided with a second pressure relief mechanism; The orientation of the first pressure relief mechanism and the orientation of the second pressure relief mechanism are both arranged at an angle to the first direction.

2. The battery according to claim 1, characterized in that, The first pressure relief mechanism is disposed at one end of the first battery cell in the second direction; The second pressure relief mechanism is disposed at one end of the second battery cell in the second direction, which is perpendicular to the first direction.

3. The battery according to claim 2, characterized in that, The orientation of both the first pressure relief mechanism and the second pressure relief mechanism is parallel to the second direction.

4. The battery according to claim 2, characterized in that, The battery also includes a housing, and the first layer of battery cells and the second layer of battery cells are disposed inside the housing; The housing includes a first wall portion along the second direction, the first wall portion being disposed opposite to the first pressure relief mechanism, and a first collection chamber being formed inside the first wall portion, the first collection chamber being used to collect the emissions of the first battery cell when the first pressure relief mechanism is actuated.

5. The battery according to claim 4, characterized in that, The battery also includes a third pressure relief mechanism, which is disposed on the first wall portion and is used to release the emissions in the first collection chamber.

6. The battery according to claim 4, characterized in that, The first wall portion has a first surface facing the first layer of battery cells, the first surface is provided with a first through hole, the first through hole communicates with the first collection cavity, and the first through hole is correspondingly provided with the first pressure relief mechanism.

7. The battery according to claim 4, characterized in that, The housing also includes a second wall portion. Along the second direction, the second wall portion is disposed opposite to the second pressure relief mechanism. A second collection chamber is formed inside the second wall portion. The second collection chamber is used to collect the emissions of the second battery cell when the second pressure relief mechanism is actuated.

8. The battery according to claim 7, characterized in that, The second wall portion is integrally formed with the first wall portion.

9. The battery according to claim 7, characterized in that, The battery also includes a fourth pressure relief mechanism, which is disposed on the second wall portion and is used to release the emissions in the second collection chamber.

10. The battery according to claim 7, characterized in that, The second wall portion has a second surface facing the second layer of battery cells, and the second surface is provided with a second through hole, which communicates with the second collection cavity and is correspondingly provided with the second pressure relief mechanism.

11. The battery according to claim 1, characterized in that, The battery also includes a housing, and the first layer of battery cells and the second layer of battery cells are disposed inside the housing; The housing includes an isolation component. Along the first direction, the isolation component is located between the first layer of battery cells and the second layer of battery cells. The first layer of battery cells is connected to the isolation component, and the second layer of battery cells is connected to the isolation component. The isolation component carries the first layer of battery cells and the second layer of battery cells.

12. The battery according to claim 11, characterized in that, The isolation component has a first flow channel inside it to accommodate the heat exchange medium.

13. The battery according to claim 11, characterized in that, The first layer of battery cells includes a first battery cell group and a second battery cell group arranged at intervals along a second direction, the second direction being perpendicular to the first direction; The housing also includes a first partition, which is disposed on the isolation component along the second direction, between the first battery cell group and the second battery cell group.

14. The battery according to claim 13, characterized in that, Along the second direction, the first pressure relief mechanism of the first battery cell group is disposed on the side of the first battery cell group opposite to the second battery cell group, and the first pressure relief mechanism of the second battery cell group is disposed on the side of the second battery cell group opposite to the first battery cell group.

15. The battery according to claim 13, characterized in that, Both the first battery cell group and the second battery cell group are connected to the first separator.

16. The battery according to claim 13, characterized in that, The interior of the first partition has a second flow channel for accommodating the heat exchange medium.

17. The battery according to claim 13, characterized in that, The first separator is integrally formed or welded to the isolation component.

18. The battery according to claim 11, characterized in that, The housing also includes two first walls disposed opposite each other along a second direction, the second direction being perpendicular to the first direction, the first layer of battery cells being disposed between the two first walls, and the isolation component connecting the two first walls.

19. The battery according to claim 18, characterized in that, The isolation component is integrally formed or welded to the two first wall portions.

20. The battery according to claim 18, characterized in that, The battery also includes a first cover, which is connected to two first walls, and along the first direction, the first layer of battery cells is located between the first cover and the isolation component.

21. The battery according to claim 11, characterized in that, The second layer of battery cells includes a third battery cell group and a fourth battery cell group arranged at intervals along a second direction, the second direction being perpendicular to the first direction; The battery further includes a second separator disposed on the isolation component along the second direction, between the third battery cell group and the fourth battery cell group.

22. The battery according to claim 21, characterized in that, Along the second direction, the second pressure relief mechanism of the third battery cell group is disposed on the side of the third battery cell group opposite to the fourth battery cell group, and the second pressure relief mechanism of the fourth battery cell group is disposed on the side of the fourth battery cell group opposite to the third battery cell group.

23. The battery according to claim 21, characterized in that, Both the third and fourth battery cell groups are connected to the second separator.

24. The battery according to claim 21, characterized in that, The interior of the second partition has a third flow channel for accommodating the heat exchange medium.

25. The battery according to claim 21, characterized in that, The second separator is integrally formed or welded to the isolation component.

26. The battery according to claim 21, characterized in that, The housing also includes two second walls disposed opposite each other along the second direction, the second layer of battery cells being disposed between the two second walls, and the isolation component connecting the two second walls.

27. The battery according to claim 26, characterized in that, The isolation component is integrally formed or welded to the two second wall portions.

28. The battery according to claim 26, characterized in that, The battery also includes a second cover, which is connected to two second walls, and along the first direction, the second layer of battery cells is located between the second cover and the insulating component.

29. The battery according to claim 1, characterized in that, The first direction is parallel to the direction of gravity.

30. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1-29.

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