Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment, the battery comprises a box body and a first layer of battery monomers, the box body comprises a box body and a first cover body, a first opening is formed in the bottom of the box body, and the first cover body covers the first opening. And the first layer of battery cells are accommodated in the box body. And a gap is formed between the first layer of battery monomers and the first cover body. The battery reliability can be improved.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are being used more and more widely. Batteries have high energy density, high safety, long service life, and are green and environmentally friendly to the social environment. They have been widely used in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery swap stations, engineering manufacturing, smart equipment, etc. At the same time, they also promote technical development and research in communications, medical equipment, energy development, etc.

[0003] In the battery production process, how to improve battery reliability is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The embodiments of the present application provide a battery and an electrical device, which can effectively improve the reliability of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising a box body and a first layer of battery cells, the box body comprising a box body and a first cover body, a first opening is formed at the bottom of the box body, and the first cover body covers the first opening; a first layer of battery cells is accommodated in the box body; wherein a gap is provided between the first battery cells and the first cover body.

[0006] In the above technical solution, a gap is set between the first layer of battery cells and the first cover body, and the gap provides a buffer space for the deformation of the first cover body. When the first cover body is subjected to external impact, the first cover body absorbs or disperses the external impact force, so that the external impact force acts less or not on the first layer of battery cells, thereby reducing the risk of damage to the first layer of battery cells and improving battery reliability.

[0007] In some embodiments, the first layer of battery cells includes a plurality of first battery cells, and a first pressure relief mechanism is disposed at one end of the first battery cells close to the first cover.

[0008] In the above technical solution, the first pressure relief mechanism is arranged at one end of the first battery cell close to the first cover body. The emissions released by the first pressure relief mechanism can directly enter the gap. The gap can relieve the temperature or pressure of the emissions, and the first pressure relief mechanism can directly discharge the emissions toward the bottom of the battery, so that the emissions are discharged in a direction away from the top, reducing the impact of the emissions on users or other components on the top of the battery, and further improving the battery reliability.

[0009] In some embodiments, the first layer of battery cells includes a plurality of first battery cells, and a first electrode terminal is further disposed at one end of the first battery cell close to the first cover.

[0010] In the above technical solution, the first electrode terminal is arranged at a position of the first battery unit close to the first cover body, and the first electrode terminal faces the first opening, which can reduce the difficulty of battery assembly.

[0011] In some embodiments, the first cover body includes a first cover body and a first inner plate which are stacked, the first inner plate being disposed on a side of the first cover body facing the first layer of battery cells, and a gap being provided between the first inner plate and the first battery cells.

[0012] In the above technical solution, the first cover body includes a first cover body and a first inner plate, which can improve the maintainability of the first cover body.

[0013] In some embodiments, the first cover body further includes a first buffer layer, and the first buffer layer is disposed between the first cover body and the first inner layer plate.

[0014] In the above technical solution, the first buffer layer can absorb or disperse external impact force, further reducing the risk of damage to the first layer of battery cells.

[0015] In some embodiments, the first buffer layer is bonded to the first inner layer panel.

[0016] In the above technical solution, the first buffer layer is bonded to the first inner layer board, which improves the connection stability between the first buffer layer and the first inner layer board, and the connection method is simple.

[0017] In some embodiments, the first cover body includes a bottom wall and a first side wall surrounding the bottom wall, and the first inner plate is disposed on a side of the bottom wall facing the first layer of battery cells.

[0018] In the above technical solution, the first cover body includes a bottom wall and a first side wall surrounding the bottom wall, so that the first cover body with higher structural strength can be obtained.

[0019] In some embodiments, the first cover body further includes a first flange portion, the first flange portion is connected to an end of the first side wall away from the bottom wall, and the first flange portion is connected to the box body.

[0020] In the above technical solution, the first cover body is flange-connected to the box body, which reduces the difficulty of assembling the battery.

[0021] In some embodiments, an edge of the first inner layer plate is welded to the first side wall to form a first welding portion.

[0022] In the above technical solution, the edge of the first inner layer plate is welded to the first side wall, which can improve the connection stability between the first inner layer plate and the first side wall.

[0023] In some embodiments, the first welding portion is disposed around the first inner plate.

[0024] In the above technical solution, the first welding portion is arranged around the first inner layer plate, which further improves the connection stability between the first inner layer plate and the first side wall.

[0025] In some embodiments, the battery further includes a second layer of battery cells, the second layer of battery cells are contained in the box, and the second layer of battery cells and the first layer of battery cells are stacked along a first direction;

[0026] The box body includes a supporting wall, the supporting wall is located between the first layer of battery cells and the second layer of battery cells, the first layer of battery cells and the second layer of battery cells are respectively connected to the supporting wall, and the supporting wall is used to carry the first layer of battery cells and the second layer of battery cells.

[0027] In the above technical solution, on the one hand, the layout of the battery cells is optimized by stacking the first layer of battery cells and the second layer of battery cells in the first direction, thereby improving the space utilization of the battery in the first direction. On the other hand, the first layer of battery cells and the second layer of battery cells share a support wall, thereby simplifying the number of support components and improving the battery energy density.

[0028] In some embodiments, the battery further comprises a first colloid, and the first layer of battery cells is connected to the support wall via the first colloid; and / or the battery further comprises a second colloid, and the second layer of battery cells is connected to the support wall via the second colloid.

[0029] In the above technical solution, the first colloid facilitates the connection between the first layer of battery cells and the support wall, reducing the difficulty of assembling the first layer of battery cells and the support wall. The second colloid facilitates the connection between the second layer of battery cells and the support wall, reducing the difficulty of assembling the second layer of battery cells and the support wall.

[0030] In some embodiments, the box body further includes a second cover body, a second opening is formed on the top of the box body, and the second cover body covers the second opening;

[0031] Along the first direction, the second cover is arranged opposite to the first cover, the box body is located between the first cover and the second cover, the first layer of battery cells is located between the first cover and the support wall, and the second layer of battery cells is located between the second cover and the support wall.

[0032] In the above technical solution, the second cover can reduce the impact of external foreign matter on the second layer of battery cells, thereby improving battery reliability.

[0033] In some embodiments, the box body also includes a pair of side walls, the pair of side walls are arranged at intervals along a second direction, the support wall connects the pair of side walls, the first cover body is connected to the pair of side walls, the second cover body is connected to the pair of side walls, and the second direction is perpendicular to the first direction.

[0034] In the above technical solution, the side walls can improve the structural strength of the box body.

[0035] In some embodiments, a pair of the side walls are integrally formed or welded with the support wall.

[0036] In the above technical solution, the integral molding of the support wall and the side wall can obtain a box body with high structural strength. The welding of the support wall and the side wall can reduce the difficulty of preparing the box body.

[0037] In some embodiments, the first layer of battery cells includes a first battery module and a second battery module arranged at intervals along the second direction;

[0038] The box body further includes a first partition beam, which is disposed on the support wall and located between the first battery module and the second battery module.

[0039] In the above technical solution, the first separation beam can improve the installation stability of the first battery module and the second battery module.

[0040] In some embodiments, the first partition beam is integrally formed or welded with the support wall.

[0041] In the above technical solution, the first partition beam and the support wall are integrally formed to obtain a box body with higher structural strength. The first partition beam and the support wall are welded to reduce the difficulty of preparing the box body.

[0042] In some embodiments, the second layer of battery cells includes a third battery module and a fourth battery module arranged at intervals along the second direction;

[0043] The box body further includes a second partition beam, which is disposed on the support wall and located between the third battery module and the fourth battery module.

[0044] In the above technical solution, the second partition beam can improve the installation stability of the third battery module and the fourth battery module.

[0045] In some embodiments, the second partition beam is integrally formed or welded with the support wall.

[0046] In the above technical solution, the second partition beam and the support wall are integrally formed to obtain a box body with high structural strength. The second partition beam and the support wall are welded to reduce the difficulty of manufacturing the box body.

[0047] In some embodiments, the first layer of battery cells includes a plurality of first battery cells, and along the first direction, the first battery cells are provided with first electrode terminals at one end thereof facing away from the second layer of battery cells;

[0048] The second layer of battery cells includes a plurality of second battery cells. Along the first direction, a second electrode terminal is disposed at one end of the second battery cells that is away from the first layer of battery cells.

[0049] In the above technical solution, the first electrode terminal is arranged at the end of the first battery cell away from the second layer of battery cells, and the second electrode terminal is arranged at the end of the second battery cell away from the first layer of battery cells, so that the first electrode terminal is far away from the second electrode terminal, which can reduce the risk of short circuit between the first layer of battery cells and the second layer of battery cells and improve electrical reliability.

[0050] In some embodiments, the first direction is parallel to the direction of gravity.

[0051] In a second aspect, an embodiment of the present application provides an electric device, the electric device comprising the above-mentioned battery, and the battery is used to supply power to the electric device. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0054] Figure 2 A schematic diagram of the battery structure of some embodiments of the present application;

[0055] Figure 3 This is a schematic diagram of an exploded view of a box body in some embodiments of the present application;

[0056] Figure 4 This is an exploded schematic diagram of a first cover body in some embodiments of the present application;

[0057] Figure 5 A cross-sectional view of a first cover body according to some embodiments of the present application;

[0058] Figure 6 An exploded schematic diagram of a battery according to some embodiments of the present application;

[0059] Figure 7 A schematic diagram of the structure of a battery in some embodiments of the present application without the first cover and the second cover;

[0060] Figure 8 A cross-sectional view of a battery according to some embodiments of the present application;

[0061] Fig. 9 are cross-sectional views of batteries according to other embodiments of the present application;

[0062] Fig.10 It is a schematic diagram of the structure of the box body of some other embodiments of the present application;

[0063] Fig.11 Schematic diagram of the structure of the support part and the side wall of some embodiments of the present application.

[0064] icon:

[0065] 10-first layer battery cell; 11-first battery module; 12-second battery module; 13-fifth battery module; 14-sixth battery module; 101-first battery cell; 1011-first electrode terminal; 1022-first pressure relief mechanism; 20-second layer battery cell; 21-third battery module; 22-fourth battery module; 23-seventh battery module; 24-eighth battery module; 201-second battery cell; 2011-second electrode terminal; 30-first cover; 31-first cover body; 311-bottom wall; 312-first side wall; 313-first flange; 32-first inner plate; 33-first buffer layer; 40-second cover; 41-second flange part; 50-box body; 51-side wall; 511-second flow channel; 52-support wall; 521-first surface; 522-second surface; 523-first flow channel; 53-first partition beam; 531-third flow channel; 54-second partition beam; 541-fourth flow channel; 55-third partition beam; 501-first opening; 502-second opening; B-first welding part; 60-first colloid; 70-second colloid; 80-end wall; 81-third flange part; 82-fourth flange part; 91-first cavity; 92-second cavity; 1000-vehicle; 100-battery; 200-motor; 300-controller; Z-first direction; Y-second direction; X-third direction.

[0066] The drawings are not drawn to scale. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0068] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0069] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0070] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0071] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0072] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0073] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0074] The term "plurality" used in the present application refers to two or more (including two).

[0075] In the present application, battery cells may include but are not limited to lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc. Battery cells include but are not limited to cylinders, flat bodies, rectangular parallelepipeds or other shapes, etc. Battery cells generally include cylindrical battery cells, square battery cells and soft-pack battery cells, etc., according to the packaging method.

[0076] Exemplarily, a battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work, and metal ions (such as lithium ions) are embedded and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive electrode sheet and the negative electrode sheet from short-circuiting, and at the same time allow active ions to pass through.

[0077] The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear.

[0078] Taking lithium-ion batteries as an example, the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0079] The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as a negative electrode tab.

[0080] The negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium may be used. The negative electrode active material may be carbon or silicon.

[0081] In order to ensure that a large current does not melt, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly can be a winding structure or a laminated structure.

[0082] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery generally includes a box for encapsulating one or more battery cells. The box can reduce the impact of liquid or other foreign matter on the charging or discharging of the battery cells.

[0083] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0084] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery reliability must also be considered.

[0085] In battery technology, battery cells are housed in a box, which is directly set on the bottom wall. When the bottom of the box is subjected to external impact force, the impact force is directly transmitted to the battery cells through the box, causing damage to the battery cells and reducing the reliability of the battery.

[0086] In view of this, in order to solve the problem that the bottom of the box is impacted, the battery cells are damaged, and the reliability of the battery cells is reduced, an embodiment of the present application provides a battery, in which the battery cells are accommodated in a box, the box includes a box body and a cover body, the bottom of the box body is open, the box cover is covered with the first opening, and a gap is set between the cover body and the box body.

[0087] The gap provides a buffer space for the deformation of the first cover body. When the first cover body is subjected to external impact, the first cover body absorbs or disperses the external impact force, so that the external impact force acts less or not on the first layer of battery cells, reducing the risk of damage to the first layer of battery cells and improving battery reliability.

[0088] The technical solutions disclosed in the embodiments of the present application are applicable to but not limited to batteries and electrical equipment using batteries.

[0089] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0090] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0091] Please refer to Figure 1 , Figure 1 1 is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of the present application. A battery 100 is disposed inside the vehicle 1000. The battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may be used as an operating power source for the vehicle 1000.

[0092] The vehicle 1000 may further include a controller 300 and a motor 200 , wherein the controller 300 is used to control the battery 100 to supply power to the motor 200 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0093] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0094] The embodiment of the present application provides a battery 100, which can effectively improve the reliability of the battery 100. The specific structure of the battery 100 is described in detail below with reference to the accompanying drawings.

[0095] Figure 2 A schematic diagram of the structure of a battery 100 according to some embodiments of the present application; Figure 3 This is a schematic diagram of the exploded view of the box body of some embodiments of the present application.

[0096] Please refer to Figure 2 and Figure 3 The embodiment of the present application provides a battery 100, which includes a box body and a first layer of battery cells 10. The box body includes a box body 50 and a first cover body 30. The bottom of the box body 50 forms a first opening 501, and the first cover body 30 covers the first opening 501. The first layer of battery cells 10 is accommodated in the box body. There is a gap between the first layer of battery cells 10 and the first cover body 30.

[0097] The first layer of battery cells 10 includes a plurality of first battery cells 101. The plurality of first battery cells 101 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of first battery cells 101 are both connected in series and in parallel. The plurality of first battery cells 101 may be electrically connected through a busbar component (not shown in the figure) to realize the plurality of first battery cells 101 being connected in series, in parallel, or in mixed connection.

[0098] The busbar component may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0099] The box body is used to accommodate the first layer of battery cells 10 . The first opening 501 is formed at the bottom of the box body 50 . The first opening 501 is an open structure for the first layer of battery cells 10 to be placed in the box body.

[0100] The box body 50 and the first cover 30 cover each other to define a storage space for accommodating the first layer of battery cells 10. Of course, the connection between the box body 50 and the first cover 30 can be sealed by a sealing element (not shown), which can be a sealing ring, sealant, etc.

[0101] The box body 50 and the first cover 30 may be in various shapes, such as a cuboid, a polygonal column, etc. For example, Figure 3 As shown, the box body 50 may be a hollow structure with one side open, the open side being the first opening 501, and the first cover 30 may also be a hollow structure with one side open, the open side of the first cover 30 covers the open side of the box body 50, thus forming a box. Of course, in some other embodiments, the box body 50 may also be a hollow structure with one side open, the first cover 30 may be a plate-shaped structure, and the first cover 30 covers the open side of the box body 50.

[0102] There is a gap between the first layer of battery cells 10 and the first cover body 30. It can be understood that the first layer of battery cells 10 is suspended relative to the first cover body 30, the first layer of battery cells 10 is not in contact with the first cover body 30, and the first cover body 30 does not directly support the first layer of battery cells 10, and the first layer of battery cells 10 can be supported by other walls of the box body 50.

[0103] A gap is set between the first battery cell 101 and the first cover body 30, and the gap provides a buffer space for the deformation of the first cover body 30. When the first cover body 30 is subjected to external impact, the first cover body 30 absorbs or disperses the external impact force, so that the external impact force acts less or not on the first layer of battery cells 10, thereby reducing the risk of damage to the first layer of battery cells 10 and improving the reliability of the battery 100.

[0104] It should be noted that, taking the battery 100 for the vehicle 1000 as an example, since the box body 50 carries the first layer of battery cells 10, after the battery 100 is installed by connecting the box body 50 to the body sheet metal or other structure, the first cover 30 may not bear the gravity of the first layer of battery cells 10 and the second layer of batteries 100, that is, the first cover 30 may not be subjected to force, and the first cover 30 may not contact other connection positions of the body, for example, the first cover 30 is suspended relative to the body.

[0105] In some implementations, the first layer of battery cells 10 includes a plurality of first battery cells 101 , and a first pressure relief mechanism 1022 is disposed at one end of the first battery cell 101 close to the first cover 30 .

[0106] The first pressure relief mechanism 1022 refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature of the first battery cell 101 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte and isolation membrane in the battery 100 cell. The pressure relief mechanism can take the form of an explosion-proof valve, an explosion-proof disk, an air valve, a pressure relief valve, a notch or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery 100 cell reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0107] The "actuation" mentioned in this embodiment refers to the action of the pressure relief mechanism or its activation to a certain state, so that the internal pressure and temperature of the battery 100 monomer can be released. The action produced by the pressure relief mechanism may include but is not limited to: at least a part of the pressure relief mechanism is ruptured, broken, torn or opened, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery 100 monomer will be discharged from the actuated part as emissions. In this way, the pressure and temperature of the battery 100 monomer can be relieved under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0108] The emissions from the battery 100 include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the isolation membrane, high-temperature and high-pressure gas generated by the reaction, flames, and the like.

[0109] In the above technical solution, the first pressure relief mechanism 1022 is arranged at one end of the first battery cell 101 close to the first cover body 30. The emissions released by the first pressure relief mechanism 1022 can directly enter the gap. The gap can relieve the temperature or pressure of the emissions, and the first pressure relief mechanism 1022 can directly discharge the emissions toward the bottom of the battery 100, so that the emissions are discharged in a direction away from the top, thereby reducing the impact of the emissions on the user or other components at the top of the battery 100, and further improving the reliability of the battery 100.

[0110] In some embodiments, the first layer of battery cells 10 includes a plurality of first battery cells 101 , and a first electrode terminal 1011 is disposed at one end of the first battery cell 101 close to the first cover 30 .

[0111] It can be understood that the first electrode terminal 1011 faces downward and the first layer of battery cells 10 is inverted.

[0112] The first electrode terminal 1011 is a metal component that leads out the current of a single battery 100 . The material of the first electrode terminal 1011 includes but is not limited to copper, lead, aluminum and alloys thereof.

[0113] The first electrode terminal 1011 is disposed at a position of the first battery cell 101 close to the first cover 30 , and the first electrode terminal 1011 faces the first opening 501 , which can reduce the difficulty of assembling the battery 100 .

[0114] Figure 4 This is a schematic diagram of an exploded view of the first cover 30 of some embodiments of the present application. Figure 5 It is a cross-sectional view of the first cover body 30 according to some embodiments of the present application.

[0115] Reference Figure 4 and Figure 5In some embodiments, the first cover body 30 includes a first cover body 31 and a first inner layer plate 32 which are stacked, and the first inner layer plate 32 is arranged on a side of the first cover body 31 facing the first battery cell 10 , and there is a gap between the first inner layer plate 32 and the first battery cell 101 .

[0116] The first inner plate 32 can be configured as a circle, a rectangle, or a special shape. For example, the first inner plate 32 is configured as a rectangular plate. The first inner plate 32 can be made of an insulating material to reduce the risk of short circuit between the first layer of battery cells 10 and the first cover 30, and also protect the interior of the box from corrosion. In order to improve the structure of the box, sheet metal stamping can also be used to set an insulating layer on the surface of the sheet metal to prepare the first inner plate 32.

[0117] The first cover body 31 is the peripheral structure of the first cover body 30 . The first cover body 31 may be constructed as a cover structure with one side open. The first cover body may also be constructed as a plate.

[0118] Since the first cover body 30 is located at the bottom of the battery 100 , bottom protection needs to be considered, so the first cover body 31 can adopt an impact-resistant structure and be provided with reinforcing ribs to improve the structural strength of the first cover body 30 .

[0119] In some embodiments, the first cover body 31 may be formed by stamping a steel plate to improve the structural strength of the first cover body 30 .

[0120] In some embodiments, the first cover body 31 may be made of a light alloy material, such as an aluminum alloy, to meet lightweight design requirements.

[0121] The first cover body 30 includes a first cover body 31 and a first inner layer plate 32 , which can improve the maintainability of the first cover body 30 .

[0122] In some embodiments, the first cover body 30 further includes a first buffer layer 33 , and the first buffer layer 33 is disposed between the first cover body 31 and the first inner layer plate 32 .

[0123] The first buffer layer 33 is an elastic component, and is an interlayer between the first cover body 31 and the first inner plate 32. The material of the first buffer layer 33 includes but is not limited to rubber, silicone, polyurethane, polyethylene, foam, etc. Optionally, the first buffer layer 33 is hard rubber, which has good elasticity, durability and buffering capacity.

[0124] The first buffer layer 33 can absorb or disperse external impact force, further reducing the risk of damage to the first layer of battery cells 10 .

[0125] In some embodiments, the first buffer layer 33 is bonded to the first inner plate 32. The bonding material includes but is not limited to double-sided adhesive, structural adhesive, and the like.

[0126] The first buffer layer 33 is bonded to the first inner layer plate 32 , which improves the connection stability between the first buffer layer 33 and the first inner layer plate 32 , and the connection method is simple.

[0127] Reference Figure 4 and Figure 5 In some embodiments, the first cover body 31 includes a bottom wall 311 and a first side wall 312 surrounding the bottom wall 311 , and the first inner plate 32 is disposed on a side of the bottom wall 311 facing the first layer of battery cells 10 .

[0128] Exemplarily, the first cover body 30 is a rectangular cover body, the bottom wall 311 is rectangular, and the first side walls 312 are four wall portions surrounding the bottom wall 311 .

[0129] Optionally, the first side wall 312 and the bottom wall 311 are integrally formed.

[0130] The first cover body 31 includes a bottom wall 311 and a first side wall 312 surrounding the bottom wall 311 , so that the first cover body 31 with high structural strength can be obtained.

[0131] Continue to refer to Figure 4 and Figure 5 In some embodiments, the first cover body 31 further includes a first flange portion 313 , the first flange portion 313 is connected to an end of the first side wall 312 away from the bottom wall 311 , and the first flange portion 313 is connected to the box body 50 .

[0132] In this embodiment, the first cover body 31 is connected to the box body 50 by flanges, which reduces the difficulty of assembling the battery 100 .

[0133] In other embodiments, a flange, such as an outer flange, may be provided at one end of the first side wall 312 away from the bottom wall 311 , and a connecting hole may be provided on the flange so that a locking piece can be inserted into the connecting hole to connect the first cover body 31 to the box body 50 .

[0134] Reference Figure 4 In some embodiments, the edge of the first inner layer plate 32 is welded to the first side wall 312 to form a first welding portion B.

[0135] The first welding portion B can be understood as a weld mark formed by welding the first inner layer plate 32 and the first side wall 312. The first welding portion B can be a mark formed by melting the welding material. The first welding portion B can also be a mark formed by accommodating a part of the first inner layer plate 32 and / or the first cover body 31.

[0136] The first welding portion B may be a spot welding mark, and the first welding portion B may also extend around the edge of the first inner layer plate 32 .

[0137] The welding method of the first inner plate 32 and the first side wall 312 includes but is not limited to laser welding, friction stir welding, arc welding, etc. Optionally, the first inner plate 32 and the first side wall 312 are welded by friction stir welding.

[0138] The edge of the first inner layer plate 32 is welded to the first side wall 312 , which can improve the connection stability between the first inner layer plate 32 and the first side wall 312 .

[0139] In some embodiments, the first welding portion B is disposed around the first inner layer plate 32 .

[0140] The first welding portion B may extend around the edge of the first inner layer plate 32 .

[0141] The first welding portion B is disposed around the first inner layer plate 32 , further improving the connection stability between the first inner layer plate 32 and the first side wall 312 .

[0142] Figure 6 Schematic diagram of an exploded view of a battery 100 according to some embodiments of the present application; Figure 7 This is a schematic structural diagram of the battery 100 of some embodiments of the present application without the first cover 30 and the second cover 40; Figure 8 is a cross-sectional view of a battery 100 according to some embodiments of the present application.

[0143] In some embodiments, the battery 100 further includes a second layer of battery cells 20 , which are accommodated in the box body, and the second layer of battery cells 20 and the first layer of battery cells 10 are stacked along the first direction Z.

[0144] The box body 50 includes a support wall 52 , which is located between the first layer of battery cells 10 and the second layer of battery cells 20 . The first layer of battery cells 10 and the second layer of battery cells 20 are respectively connected to the support wall 52 , and the support wall 52 is used to support the first layer of battery cells 10 and the second layer of battery cells 20 .

[0145] The second layer of battery cells 20 includes a plurality of second battery cells 201 , and the plurality of second battery cells 201 can be connected in parallel, in series, or in mixed connection through a busbar component.

[0146] The first direction Z can be understood as a direction parallel to the direction of gravity, or a direction at a certain angle to the direction of gravity. In some embodiments, when the first direction Z is regarded as a direction parallel to the direction of gravity, the first layer of single-layer cells is located below the support wall 52, and the second layer of battery cells 20 is located above the support wall 52.

[0147] The support wall 52 is a part of the box body 50, and is a component that supports and fixes the first layer of battery cells 10 and the second layer of battery cells 20. The support wall 52 supports the first layer of battery cells 10 and the second layer of battery cells 20, which means that the gravity of the first layer of battery cells 10 and the second layer of battery cells 20 are both applied to the support wall 52, and the support wall 52 provides the first layer of battery cells 10 and the second layer of battery cells 20 with a force to overcome the gravity.

[0148] Exemplarily, the support wall 52 is configured as a rectangular plate.

[0149] The material of the support wall 52 includes, but is not limited to, copper, iron, aluminum and alloys thereof.

[0150] In this embodiment, the battery 100 is arranged in double layers. On the one hand, the first layer of battery cells 10 and the second layer of battery cells 20 are stacked along the first direction Z, thereby optimizing the layout of the battery 100 and improving the space utilization of the battery 100 in the first direction Z. On the other hand, the first layer of battery cells 10 and the second layer of battery cells 20 share a support wall 52, thereby simplifying the number of support components and improving the energy density of the battery 100.

[0151] Fig. 9 sectional views of batteries 100 according to other embodiments of the present application.

[0152] Reference Fig. 9 In some embodiments, the battery 100 further includes a first colloid 60 , and the first layer of battery cells 10 is connected to the support wall 52 via the first colloid 60 .

[0153] In some embodiments, the battery 100 further includes a second colloid 70 , and the second layer of battery cells 20 are connected to the support wall 52 via the second colloid 70 .

[0154] The materials of the first colloid 60 and the second colloid 70 can be the same or different, and the materials of the first colloid 60 and the second colloid 70 include but are not limited to thermal conductive glue, resin, artificial rubber or water glass, etc. Optionally, the first colloid 60 and the second colloid 70 are both thermal conductive glue.

[0155] The first colloid 60 facilitates the connection between the first layer of battery cells 10 and the support wall 52, thereby reducing the difficulty of assembling the first layer of battery cells 10 and the support wall 52. The second colloid 70 facilitates the connection between the second layer of battery cells 20 and the support wall 52, thereby reducing the difficulty of assembling the second layer of battery cells 20 and the support wall 52.

[0156] Fig.10 Schematic diagram of the structure of the box body 50 of other embodiments of the present application.

[0157] Reference Fig.10In some embodiments, the box body further includes a second cover 40, a second opening 502 is formed on the top of the box body 50, and the second cover 40 covers the second opening 502. Along the first direction Z, the second cover 40 is arranged opposite to the first cover 30, the box body 50 is located between the first cover 30 and the second cover 40, the first layer of battery cells 10 is located between the first cover 30 and the support wall 52, and the second layer of battery cells 20 is located between the second cover 40 and the support wall 52.

[0158] The second cover 40 can be understood as an upper cover, and the second cover 40 can be constructed as a cover structure with one side open, or as a flat plate. The structure and material of the first cover 30 and the second cover 40 can be the same or different.

[0159] The bottom of the box body 50 forms a first opening 501, the top of the box body 50 forms a second opening 502, and both ends of the box body 50 are open. The second opening 502 is the open side of the box body 50, and the second opening 502 is used to place the second layer of battery cells 20 in the box body. Taking the box body 50 as a rectangle as an example, the first opening 501 and the second opening 502 are both rectangular openings.

[0160] A seal may be provided at the connection between the box body 50 and the second cover 40 to improve the sealing of the battery 100 .

[0161] The second cover 40 can reduce the impact of external foreign matter on the second-layer battery cells 20 , thereby improving the reliability of the battery 100 .

[0162] In some embodiments, Fig. 9 As shown, the second cover body 40 may further include a second flange portion 41 , and the second cover body 40 is connected to the pair of side walls 51 via the second flange portion 41 .

[0163] In other embodiments, based on design requirements, when the sealing requirements for the battery 100 are not high, in order to meet the lightweight index, the second cover 40 may not be provided, that is, the second layer of battery cells 20 are exposed to the outside.

[0164] Fig.11 Schematic diagram of the structure of the support portion and the side wall 51 of some embodiments of the present application.

[0165] Reference Fig.10 and Fig.11 In some embodiments, the box body 50 further includes a pair of side walls 51, the pair of side walls 51 are spaced apart along the second direction Y, the support wall 52 connects the pair of side walls 51, the first cover 30 is connected to the pair of side walls 51, the second cover 40 is connected to the pair of side walls 51, and the second direction Y is perpendicular to the first direction Z. A box body 50 with a simple structure and high structural strength can be obtained.

[0166] Exemplarily, the side wall 51 and the support wall 52 are both configured as rectangular plates.

[0167] In some embodiments, a pair of side walls 51 and a support wall 52 are connected to form an H shape. Specifically, the support wall 52 has a first surface 521 and a second surface 522 that are oppositely arranged along its thickness direction, and both ends of the side wall 51 extend beyond the first surface 521 and the second surface 522, respectively. The thickness direction of the support wall 52 is parallel to the first direction Z. Along the second direction Y, the first layer of battery cells 10 and the second layer of battery cells 20 are located between the pair of side walls 51.

[0168] It can be understood that in this embodiment, along the first direction Z, one end of the side wall 51 protrudes from the first surface 521 , and the other end of the side wall 51 protrudes from the second surface 522 .

[0169] Optionally, the distance that the side wall 51 extends beyond the first surface 521 is equal to the distance that the side wall 51 extends beyond the second surface 522 , and the support wall 52 is centrally disposed.

[0170] In this embodiment, both ends of the side wall 51 extend beyond the first surface 521 and the second surface 522 respectively, so that a box body 50 with higher structural strength can be obtained. The first layer of battery cells 10 and the second layer of battery cells 20 are both located between a pair of side walls 51, which can improve the stability of the battery 100.

[0171] Of course, the side wall 51 and the support wall 52 may not be set to an H shape. In other embodiments, along the first direction Z, one end of the side wall 51 may only extend beyond one of the first surface 521 and the second surface 522, while the other end does not extend beyond the other of the first surface 521 and the second surface 522. For example, one end of the side wall 51 extends beyond the first surface 521, and the other end does not extend beyond the second surface 522. A pair of side walls 51 and support walls 52 are connected end to end in sequence to form an n-shaped structure (such as Figure 2 As shown), at this time, along the second direction Y, the two side walls 51 are respectively located on both sides of the first layer of battery cells 10, the first layer of battery cells 10 is located between a pair of side walls 51, and there are no side walls 51 on both sides of the second layer of battery cells 20, and the second layer of battery cells 20 is not between the pair of side walls 51.

[0172] The side wall 51 and the support wall 52 can be integrally formed, or they can be constructed separately and then fixedly connected. The side wall 51 and the support wall 52 can be made of the same or different materials.

[0173] In some embodiments, a mounting portion may be provided on the side wall 51 to facilitate installation of the battery 100. For example, the box body 50 is connected to the sheet metal of the vehicle 1000 through the mounting portion to install the battery 100. The mounting portion includes but is not limited to angle steel, handle, sleeve, mounting hole, etc.

[0174] In some embodiments, both sides of the first layer of battery cells 10 along the second direction Y are respectively connected to a pair of side walls 51 , and both sides of the second layer of battery cells 20 along the second direction Y are respectively connected to a pair of side walls 51 .

[0175] The first layer of battery cells 10 and the side wall 51 may be connected by abutting, bonding, welding or the like.

[0176] The second layer of battery cells 20 and the side wall 51 may be connected by abutting, bonding, welding or the like.

[0177] The first layer of battery cells 10 are connected to a pair of side walls 51 on both sides along the second direction Y, which improves the connection stability between the first layer of battery cells 10 and the box body 50. The second layer of battery cells 20 are connected to a pair of side walls 51 on both sides along the second direction Y, which improves the connection stability between the second layer of battery cells 20 and the box body 50.

[0178] In some embodiments, a pair of side walls 51 are integrally formed with the support wall 52. The integral forming process includes but is not limited to injection molding, extrusion molding, etc. The integral forming of the support wall 52 and the side wall 51 can obtain a box body 50 with higher structural strength.

[0179] In some embodiments, a pair of side walls 51 are welded to the support wall 52. Optionally, the support frame is welded to the side wall 51 by stir friction welding.

[0180] The welding of the support wall 52 and the side wall 51 can reduce the difficulty of manufacturing the box body 50 .

[0181] In some embodiments, reference Figure 7 The first layer of battery cells 10 includes a plurality of first battery cells 101, and the plurality of first battery cells 101 are fixedly integrated into four battery modules 100, namely, a first battery module 11, a second battery module 12, a fifth battery module 13 and a sixth battery module 14. The first battery module 11 and the second battery module 12 are arranged along the second direction Y, and the fifth battery module 13 and the sixth battery module 14 are arranged along the second direction Y. Along the third direction X, the first battery module 11 corresponds to the fifth battery module 13, and the second battery module 12 corresponds to the sixth battery module 14.

[0182] In some embodiments, reference Figure 7The second layer of battery cells 20 includes a plurality of second battery cells 201, and the plurality of second battery cells 201 are fixedly integrated into four battery 100 modules, namely the third battery module 21, the fourth battery module 22, the seventh battery module 23 and the eighth battery module 24. The third battery module 21 and the fourth battery module 22 are arranged along the second direction Y, and the seventh battery module 23 and the eighth battery module 24 are arranged along the second direction Y. Along the third direction X, the third battery module 21 corresponds to the seventh battery module 23, and the fourth battery module 22 corresponds to the eighth battery module 24.

[0183] Reference Fig.11 and Figure 7 In some embodiments, the first layer of battery cells 10 includes a first battery module 11 and a second battery module 12 arranged at intervals along the second direction Y. The box body 50 also includes a first partition beam 53, which is disposed on the support wall 52 and located between the first battery module 11 and the second battery module 12.

[0184] The first partition beam 53 is a structural member that assists in mounting the battery module 100. The first partition beam 53 and the support wall 52 may be made of the same or different materials.

[0185] Exemplarily, the first dividing beam 53 protrudes from the first surface 521 , the first dividing beam 53 extends along the third direction X, and the first dividing beam 53 is also located between the fifth battery module 13 and the sixth battery module 14 .

[0186] The first partition beam 53 can improve the installation stability of the first battery module 11 and the second battery module 12 .

[0187] In some embodiments, the first battery module 11 and the second battery module 12 are both connected to the first separation beam 53 .

[0188] The first battery module 11 and the first partition beam 53 may be connected by bonding, welding, etc. The second battery module 12 and the second partition beam 54 may be connected by bonding, welding, etc.

[0189] The first battery module 11 and the second battery module 12 are both connected to the first partition beam 53 , which can improve the structural stability of the battery 100 .

[0190] In some embodiments, the first partition beam 53 is integrally formed with the support wall 52. The integral forming process includes but is not limited to extrusion molding and injection molding.

[0191] The first partition beam 53 and the support wall 52 are integrally formed to obtain a box body 50 with higher structural strength.

[0192] In some embodiments, the first partition beam 53 is welded to the support wall 52. Optionally, the first partition beam 53 is welded to the support wall 52 by friction stir welding.

[0193] The welding of the first partition beam 53 and the support wall 52 can reduce the difficulty of manufacturing the box body 50 .

[0194] Reference Fig.11 and Figure 7 In some embodiments, the second layer of battery cells 20 includes a third battery module 21 and a fourth battery module 22 which are arranged at intervals along the second direction Y.

[0195] The box body 50 further includes a second partition beam 54 , which is disposed on the support wall 52 and located between the third battery module 21 and the fourth battery module 22 , so as to improve the installation stability of the third battery module 21 and the fourth battery module 22 .

[0196] The second partition beam 54 is a structural member for assisting the installation of the battery module 100. The second partition beam 54 and the support wall 52 may be made of the same or different materials. The second partition beam 54 and the first partition beam 53 may have the same or different structures.

[0197] Exemplarily, the second dividing beam 54 protrudes from the second surface 522 , the second dividing beam 54 extends along the third direction X, and the second dividing beam 54 is also located between the seventh battery module 23 and the eighth battery module 24 .

[0198] In some embodiments, the second partition beam 54 is integrally formed with the support wall 52 .

[0199] The forming method of the second partition beam 54 and the support wall 52 may refer to the forming method of the first partition beam 53 and the support wall 52 .

[0200] The second partition beam 54 and the support wall 52 are integrally formed to obtain the box body 50 with higher structural strength.

[0201] In some embodiments, the second partition beam 54 is welded to the support wall 52. The welding method of the second partition beam 54 and the support wall 52 can refer to the welding method of the first partition beam 53 and the support wall 52.

[0202] The welding of the second partition beam 54 and the support wall 52 can reduce the difficulty of manufacturing the box body 50 .

[0203] Reference Fig.10In some embodiments, the box body 50 may further include a third partition beam 55, which is connected to the support wall 52 and is located between the third battery module 21 and the seventh battery module 23. Exemplarily, the second partition beam 54 and the third partition beam 55 are cross-arranged, and the second partition beam 54 and the third partition beam 55 divide the second surface 522 of the support wall 52 into four installation areas, and the four installation areas are used to place the third battery module 21, the fourth battery module 22, the seventh battery module 23 and the eighth battery module 24 respectively.

[0204] Similarly, in some embodiments, the box body 50 may further include a fourth partition beam (not shown in the figure), and the fourth partition beam is located between the fifth battery module 13 and the first battery module 11. The arrangement of the fourth partition beam and the first partition beam 53 can refer to the arrangement of the second partition beam 54 and the third partition beam 55, and will not be repeated here.

[0205] In some embodiments, a flow channel for accommodating a heat exchange medium is formed inside the box body 50 , thereby adjusting the temperature inside the battery 100 .

[0206] The heat exchange medium may also be referred to as a cooling medium or cooling fluid. The heat exchange medium may be a liquid or a gas. Adjusting the temperature refers to heating or cooling the multiple battery cells 100. Optionally, the fluid may be circulated to achieve a better temperature adjustment effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, or air.

[0207] Reference Figure 8 In some embodiments, a first flow channel 523 for accommodating a heat exchange medium is formed inside the support wall 52 , and the support wall 52 is used to adjust the temperature of the first layer of battery cells 10 and the second layer of battery cells 20 .

[0208] Reference Figure 8 In some embodiments, a second flow channel 511 for accommodating a heat exchange medium is formed inside the side wall 51 .

[0209] It should be noted that, when the side wall 51 exceeds the first surface 521, the heat exchange medium contained in the side wall 51 can adjust the temperature of the first layer of battery cells 10. When the side wall 51 exceeds the second surface 522, the heat exchange medium contained in the side wall 51 can adjust the temperature of the second layer of battery cells 20. When both ends of the side wall 51 exceed the first surface 521 and the second surface 522 respectively, the side wall 51 can adjust the temperature of the first layer of battery cells 10 and the second layer of battery cells 20 at the same time.

[0210] Reference Figure 8 In some embodiments, a third flow channel 531 for accommodating a heat exchange medium is formed inside the first dividing beam 53 .

[0211] Reference Figure 8 In some embodiments, a fourth flow channel 541 for accommodating a heat exchange medium is formed inside the second dividing beam 54 .

[0212] Reference Fig.10 and Fig. 9 In some embodiments, the box body 50 includes a pair of end walls 80, and the pair of end walls 80 are arranged at intervals along the third direction X. The support wall 52 is located between the pair of end walls 80, and the two ends of each end wall 80 are respectively connected to a pair of side walls 51, and the third direction X, the second direction Y and the first direction Z are perpendicular to each other.

[0213] The pair of side walls 51 and the pair of end walls 80 enclose a first opening 501 and a second opening 502 .

[0214] The first cover 30 is also connected to a pair of end walls 80, and the second cover 40 is also connected to a pair of end walls 80. The first cover 30, the second cover 40, the pair of end walls 80 and the pair of side walls 51 enclose a receiving cavity. The supporting wall 52 separates the receiving cavity into a first cavity 91 and a second cavity 92. The first layer of battery cells 10 are received in the first cavity 91, and the second layer of battery cells 20 are received in the second cavity 92.

[0215] It is understandable that a pair of end walls 80 and a pair of side walls 51 enclose the outer structure of the battery 100. Taking the rectangular battery 100 as an example, the side walls 51 and the end walls 80 can both be constructed as rectangular plates, and the side walls 51 and the end walls 80 are sequentially connected to form a rectangular frame.

[0216] In some embodiments, Fig.10 As shown, along the first direction Z, a third flange portion 81 and a fourth flange portion 82 are respectively formed at both ends of the end wall 80 . The third flange portion 81 is used to connect to the first cover body 30 , and the fourth flange portion 82 is used to connect to the second cover body 40 .

[0217] The first cavity 91 is between the first cover 30 and the support wall 52, and the second cavity 92 is between the second cover 40 and the support wall 52. Along the first direction Z, the first cavity 91 and the second cavity 92 are located on both sides of the support wall 52, respectively. The first cavity 91 and the second cavity 92 are two independent cavities, and the first cavity 91 and the second cavity 92 are not connected, which can alleviate the impact of the thermal runaway of one cavity on the other cavity. Of course, in other embodiments, the first cavity 91 and the second cavity 92 can also be connected to each other to balance the temperature inside the battery 100.

[0218] In this embodiment, a first cavity 91 is defined by the first cover 30, the support box body 50 and a pair of end walls 80, and the first cavity 91 is an internal environment for accommodating the first layer of battery cells 10. A second cavity 92 is defined by the second cover 40, the support box body 50 and a pair of end walls 80, and the second cavity 92 is an internal environment for accommodating the second layer of battery cells 20.

[0219] Reference Figure 8 In some embodiments, the first layer of battery cells 10 includes a plurality of first battery cells 101, and along the first direction Z, the first battery cells 101 are provided with a first electrode terminal 1011 at one end thereof facing away from the second layer of battery cells 20. The second layer of battery cells 20 includes a plurality of second battery cells 201, and along the first direction Z, the second battery cells 201 are provided with a second electrode terminal 2011 at one end thereof facing away from the first layer of battery cells 10.

[0220] It can be understood that the first electrode terminal 1011 faces the top and the second electrode terminal 2011 faces the bottom.

[0221] By setting the first electrode terminal 1011 at the end of the first battery cell 101 away from the second battery cell 20, and setting the second electrode terminal 2011 at the end of the second battery cell 201 away from the first battery cell 10, the first electrode terminal 1011 is far away from the second electrode terminal 2011, which can reduce the risk of short circuit between the first layer of battery cells 10 and the second layer of battery cells 20 and improve electrical reliability.

[0222] Of course, in other embodiments, the first electrode terminal 1011 may also face sideways, and the second electrode terminal 2011 may also face sideways.

[0223] In some embodiments, the first direction Z is parallel to the direction of gravity.

[0224] The embodiment of the present application further provides an electric device, which includes the battery 100 mentioned above.

[0225] The embodiment of the present application further provides a battery 100 , which includes a first layer of battery cells 10 , a second layer of battery cells 20 , a box body 50 , a first cover 30 , and a second cover 40 .

[0226] The bottom wall 311 of the box body 50 forms a first opening 501, and the top of the box body forms a second opening 502. The box body 50 includes a pair of side walls 51, a pair of end walls 80, and a support wall 52. The support wall 52, the pair of side walls 51, the first partition beam 53, and the second partition beam 54 are integrally formed. The pair of side walls 51 are arranged at intervals along the second direction Y, and the support wall 52 is located between the pair of side walls 51. The pair of end walls 80 are arranged at intervals along the third direction X, and the support wall 52 is located between the pair of end walls 80, and the two ends of each end wall 80 are respectively connected to the pair of side walls 51.

[0227] The support wall 52 has a first surface 521 and a second surface 522 opposite to each other along its thickness direction, the first surface 521 being the lower surface and the second surface 522 being the upper surface. Along the first direction Z, both ends of the first side wall 312 extend beyond the first surface 521 and the second surface 522, respectively. A first flow channel 523 for accommodating a heat exchange medium is formed inside the support wall 52, a second flow channel 511 for accommodating a heat exchange medium is formed inside the side wall 51, a third flow channel 531 for accommodating a heat exchange medium is formed inside the first partition beam 53, and a fourth flow channel 541 for accommodating a heat exchange medium is formed inside the second partition beam 54.

[0228] The first cover 30 covers the first opening 501 and is flange-connected to the pair of side walls 51 and the pair of end walls 80. The second cover 40 covers the second opening 502 and is flange-connected to the pair of end walls 80 and the pair of side walls 51. The first cover 30, the second cover 40, the pair of end walls 80 and the pair of side walls 51 enclose a receiving cavity, and the supporting wall 52 divides the receiving cavity into a first cavity 91 and a second cavity 92. The first layer of battery cells 10 are received in the first cavity 91, and the second layer of battery cells 20 are received in the second cavity 92.

[0229] The support wall 52 is used to support the first layer of battery cells 10 and the second layer of battery cells 20 . The support wall 52 is also configured to adjust the temperature of the first layer of battery cells 10 and the second layer of battery cells 20 .

[0230] The first layer of battery cells 10 includes a plurality of first battery cells 101, and the plurality of first battery cells 101 are fixedly integrated into four battery modules 100, namely a first battery module 11, a second battery module 12, a fifth battery module 13 and a sixth battery module 14. The first battery module 11 and the second battery module 12 are arranged along the second direction Y, and the fifth battery module 13 and the sixth battery module 14 are arranged along the second direction Y. Along the third direction X, the first battery module 11 corresponds to the fifth battery module 13, and the second battery module 12 corresponds to the sixth battery module 14.

[0231] The second layer of battery cells 20 includes a plurality of second battery cells 201, and the plurality of second battery cells 201 are fixedly integrated into four battery 100 modules, namely the third battery module 21, the fourth battery module 22, the seventh battery module 23 and the eighth battery module 24. The third battery module 21 and the fourth battery module 22 are arranged along the second direction Y, and the seventh battery module 23 and the eighth battery module 24 are arranged along the second direction Y. Along the third direction X, the third battery module 21 corresponds to the seventh battery module 23, and the fourth battery module 22 corresponds to the eighth battery module 24.

[0232] The first layer of battery cells 10 is bonded to the first surface 521 by thermally conductive adhesive, and the first layer of battery cells 10 is bonded to the side wall 51 by thermally conductive adhesive. The second layer of battery cells 20 is bonded to the second surface 522 by thermally conductive adhesive, and the second layer of battery cells 20 is bonded to the side wall 51 by thermally conductive adhesive. Along the second direction Y, the first layer of battery cells 10 and the second layer of battery cells 20 are both located between the pair of side walls 51.

[0233] The first partition beam 53 extends along the third direction X, is connected to the support wall 52 and protrudes from the first surface 521, is located between the first battery module 11 and the second battery module 12, and is located between the fifth battery module 13 and the sixth battery module 14. The first battery module 11, the second battery module 12, the fifth battery module 13 and the sixth battery module 14 are all bonded to the first partition beam 53 by thermally conductive adhesive.

[0234] The second partition beam 54 extends along the third direction X, is connected to the support wall 52 and protrudes from the second surface 522, is located between the third battery module 21 and the fourth battery module 22, and is located between the seventh battery module 23 and the eighth battery module 24. The third battery module 21, the fourth battery module 22, the seventh battery module 23 and the eighth battery module 24 are all bonded to the second partition beam 54 by thermally conductive adhesive.

[0235] The first battery cell 101 is provided with a first electrode terminal 1011 at one end away from the support wall 52, and the first electrode terminal 1011 is located at the bottom of the first battery cell 101. The second battery cell 201 is provided with a second electrode terminal 2011 at one end away from the support wall 52, and the second electrode terminal 2011 is located at the top of the second battery cell 201. The first layer of battery cells 10 and the second layer of battery cells 20 are arranged in a mirror image, and the mirror planes of the first layer of battery cells 10 and the second layer of battery cells 20 are parallel to the plane formed by the second direction Y and the third direction X.

[0236] The first cover body 30 includes a first cover body 31, a first inner plate 32 and a first buffer layer 33. The first inner plate 32 is arranged on the side of the first cover body 31 facing the first battery cell 10. There is a gap between the first inner plate 32 and the first battery cell 101. The first buffer layer 33 is arranged between the first cover body 31 and the first inner plate 32. The first buffer layer 33 is a rubber layer. The first cover body 31 is formed by stamping of sheet metal, the first inner plate 32 is formed by stamping of sheet metal, and the first inner plate 32 is welded to the first cover body 31.

[0237] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0238] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include; The box body comprises a box body and a first cover body, wherein a first opening is formed at the bottom of the box body, and the first cover body covers the first opening; A first layer of battery cells, contained in the box; There is a gap between the first layer of battery cells and the first cover.

2. The battery according to claim 1, characterized in that The first layer of battery cells includes a plurality of first battery cells, and a first pressure relief mechanism is disposed at one end of the first battery cell close to the first cover.

3. The battery according to claim 1, characterized in that The first layer of battery cells includes a plurality of first battery cells, and a first electrode terminal is disposed at one end of the first battery cell close to the first cover.

4. The battery according to claim 1, characterized in that The first cover body includes a first cover body and a first inner plate which are stacked. The first inner plate is arranged on a side of the first cover body facing the first layer of battery cells. The first layer of battery cells includes a plurality of first battery cells. There is a gap between the first inner plate and the first battery cells.

5. The battery according to claim 4, characterized in that The first cover body further includes a first buffer layer, and the first buffer layer is arranged between the first cover body and the first inner layer plate.

6. The battery according to claim 5, characterized in that The first buffer layer is bonded to the first inner layer plate.

7. The battery according to claim 4, characterized in that The first cover body includes a bottom wall and a first side wall surrounding the bottom wall, and the first inner plate is arranged on a side of the bottom wall facing the first layer of battery cells.

8. The battery according to claim 7, characterized in that The first cover body further includes a first flange portion, the first flange portion is connected to an end of the first side wall away from the bottom wall, and the first flange portion is connected to the box body.

9. The battery according to claim 7, characterized in that The edge of the first inner layer plate is welded to the first side wall to form a first welding portion.

10. The battery according to claim 9, characterized in that The first welding portion is disposed around the first inner layer plate.

11. The battery according to any one of claims 1 to 10, characterized in that: The battery also includes: A second layer of battery cells is contained in the box, and the second layer of battery cells and the first layer of battery cells are stacked along a first direction; The box body includes a supporting wall, the supporting wall is located between the first layer of battery cells and the second layer of battery cells, the first layer of battery cells and the second layer of battery cells are respectively connected to the supporting wall, and the supporting wall is used to carry the first layer of battery cells and the second layer of battery cells.

12. The battery according to claim 11, characterized in that The battery further comprises a first colloid, and the first layer of battery cells is connected to the support wall through the first colloid; and / or, The battery further includes a second colloid, and the second layer of battery cells is connected to the supporting wall through the second colloid.

13. The battery according to claim 12, characterized in that The box also includes: A second cover body, a second opening is formed on the top of the box body, and the second cover body covers the second opening; Along the first direction, the second cover is arranged opposite to the first cover, the box body is located between the first cover and the second cover, the first layer of battery cells is located between the first cover and the support wall, and the second layer of battery cells is located between the second cover and the support wall.

14. The battery according to claim 13, characterized in that The box body also includes a pair of side walls, the pair of side walls are spaced apart along a second direction, the support wall connects the pair of side walls, the first cover is connected to the pair of side walls, the second cover is connected to the pair of side walls, and the second direction is perpendicular to the first direction.

15. The battery according to claim 14, characterized in that The pair of side walls are integrally formed or welded with the support wall.

16. The battery according to claim 14, characterized in that The first layer of battery cells includes a first battery module and a second battery module arranged at intervals along the second direction; The box body also includes: The first partition beam is disposed on the support wall and is located between the first battery module and the second battery module.

17. The battery according to claim 16, characterized in that The first partition beam and the support wall are integrally formed or welded.

18. The battery according to claim 16, characterized in that The second layer of battery cells includes a third battery module and a fourth battery module arranged at intervals along the second direction; The box body also includes: The second partition beam is arranged on the support wall and is located between the third battery module and the fourth battery module.

19. The battery according to claim 18, characterized in that The second partition beam is integrally formed with or welded to the support wall.

20. The battery according to claim 11, characterized in that The first layer of battery cells includes a plurality of first battery cells, and along the first direction, the first battery cells are provided with first electrode terminals at one end thereof away from the second layer of battery cells; The second layer of battery cells includes a plurality of second battery cells. Along the first direction, a second electrode terminal is disposed at one end of the second battery cells that is away from the first layer of battery cells.

21. The battery according to claim 11, characterized in that The first direction is parallel to the direction of gravity.

22. An electrical equipment, characterized in that: A battery comprising any one of claims 1 to 21.

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