Battery and electric device

Abstract

The utility model discloses a battery and an electric device. The battery comprises a box body and a cover plate assembly, the box body comprises a plurality of accommodating parts, at least one side of each accommodating part is opened to form an opening, the opening directions of at least two accommodating parts in the plurality of accommodating parts are different, and at least one battery monomer is accommodated in each accommodating part. The cover plate assembly is connected to the box body and covers the openings of the containing parts. And when the battery monomers accommodated in one accommodating part are in thermal runaway, most of heat is diffused outwards through the opening of the accommodating part. According to the battery disclosed by the utility model, the heat diffused outwards cannot be quickly and more transferred to the accommodating parts with different opening directions, so that the possibility that the battery monomers in the other accommodating parts with different opening directions are simultaneously subjected to thermal runaway when the battery monomers accommodated in one accommodating part are subjected to thermal runaway is greatly reduced, and the reliability of the battery is greatly improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery and an electrical device. Background Art

[0002] With the development of new energy technologies, batteries are being used more and more widely. For example, batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields.

[0003] The development of battery technology must consider multiple design factors at the same time, such as energy density, cycle life, processing technology, etc., and the reliability of the battery must also be considered. How to improve the reliability of the battery is an important research direction in the battery field. Utility Model Content

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

[0005] According to the first aspect of the present application, an embodiment of the present application provides a battery, which includes a box body and a cover assembly. The box body includes a plurality of accommodating parts, at least one side of each accommodating part is open to form an opening, at least two of the plurality of accommodating parts have different opening directions, and each accommodating part accommodates at least one battery cell. The cover assembly is connected to the box body and covers the openings of the plurality of accommodating parts.

[0006] When a battery cell accommodated in one of the accommodating parts experiences thermal runaway, the heat that diffuses outward will not be quickly and largely transferred to the accommodating parts with different openings, which greatly reduces the possibility that the thermal runaway of a battery cell accommodated in one of the accommodating parts will cause the battery cells in at least one of the remaining accommodating parts to experience thermal runaway at the same time, thereby greatly improving the reliability of the battery.

[0007] Optionally, the opening directions of at least two of the multiple receiving parts are opposite and / or intersecting. When a battery cell accommodated in one of the receiving parts experiences thermal runaway, the direction of heat diffusion is opposite and / or intersecting with the opening direction of at least one other receiving part, which at least does not cause the battery cell in the other receiving part to experience thermal runaway at the same time, effectively improving the reliability of the battery.

[0008] Optionally, the plurality of accommodating parts are arranged along the second direction, and the opening directions of two adjacent accommodating parts along the second direction are different. When a battery cell accommodated in any accommodating part has thermal runaway, the heat diffused outward will not be quickly and largely transferred to other accommodating parts adjacent thereto, which greatly reduces the possibility that the battery cell accommodated in any accommodating part will cause thermal runaway of the battery cells in other adjacent accommodating parts at the same time when the battery cell accommodated in any accommodating part has thermal runaway, further improving the reliability of the battery.

[0009] Optionally, the box body includes a bottom plate, at least one side plate and at least one partition beam; at least one side plate is connected to the bottom plate and encloses the bottom plate to form an internal space of the box body, the internal space has an opening side arranged opposite to the bottom plate along a first direction; at least one partition beam is arranged in the internal space, and divides the internal space into a plurality of first accommodating portions arranged at intervals along a second direction, and the second direction intersects with the first direction; a second accommodating portion is formed inside each partition beam, the plurality of accommodating portions include a first accommodating portion and a second accommodating portion, and the opening direction of the second accommodating portion is different from that of the first accommodating portion.

[0010] The embodiment of the present application, by providing partition beams, can, on the one hand, form multiple first accommodating portions to accommodate multiple battery cells in partitions, and the partition beams can also improve the overall structural strength of the box body, thereby improving the structural stability and rigidity of the battery; on the other hand, a second accommodating portion can be formed in each partition beam, which not only improves the space utilization of the battery, thereby increasing the volume and energy density of the battery, but also can separate two adjacent first accommodating portions, so that the opening directions of any two adjacent accommodating portions are different, and the thermal runaway protection effect is better.

[0011] Optionally, the bottom plate, at least one side plate and at least one partition beam are an integrally formed structure, which simplifies the processing technology of the box body and improves the production efficiency of the battery.

[0012] Optionally, at least one side panel includes a first side panel and a second side panel arranged opposite to each other along a second direction, and a third side panel and a fourth side panel arranged opposite to each other along a third direction, the first direction, the second direction and the third direction are perpendicular to each other, and the third side panel and the fourth side panel are both connected between the first side panel and the second side panel; the second accommodating portion forms an opening in at least one of the bottom panel, the third side panel and the fourth side panel, which is conducive to flexible selection of the opening direction of the second accommodating portion.

[0013] Optionally, the second accommodating portion forms an opening on the bottom plate, the third side plate and the fourth side plate; the cover plate assembly includes at least one second cover plate, each second cover plate is connected to the box body and covers the opening of a corresponding second accommodating portion.

[0014] The second receiving portion of the embodiment of the present application forms openings on the bottom plate, the third side plate and the fourth side plate, so as to facilitate the installation of the battery cell in the second receiving portion. The cover plate assembly includes at least one second cover plate arranged corresponding to the second receiving portion, and the at least one second receiving portion is relatively independently covered by the at least one second cover plate, which not only meets the packaging requirements of the battery cell, but also helps to reduce the total volume and total mass of the cover plate assembly, thereby reducing the total weight of the battery.

[0015] Optionally, the cover plate assembly includes a first cover plate, the first cover plate covers the opening side of the internal space, and each second cover plate is connected to the first cover plate, thereby improving the connection strength and firmness of the second cover plates and preventing them from falling off.

[0016] Optionally, the cover plate assembly includes a first cover plate, which covers the opening side of the internal space; a heat exchange channel for the heat exchange medium to flow is formed inside the first cover plate. The heat exchange medium flowing in the heat exchange channel can exchange heat with the battery cells in the first accommodating portion, thereby providing heat to the battery cells or taking away the heat emitted by the battery cells, effectively improving the temperature of the battery cells and improving the reliability of the battery.

[0017] Optionally, the first accommodating portion accommodates a first battery cell, and the second accommodating portion accommodates a second battery cell; under the same environmental parameters, the heat generation rate of the second battery cell is lower than that of the first battery cell, reducing the possibility of large amounts of heat accumulation and making the design more reasonable.

[0018] Optionally, the cover plate assembly includes at least one first cover plate, which is connected to the box body at the opening side of the internal space and covers the openings of the plurality of first receiving portions. The embodiment of the present application realizes the packaging of the battery cells in the first receiving portions through at least one first cover plate, which has a simple structure and is easy to assemble.

[0019] Optionally, at least one partition beam includes multiple partition beams, and the multiple accommodating portions include multiple second accommodating portions; the cover plate assembly includes at least one second cover plate, and the at least one second cover plate is connected to the box body and covers the openings of the multiple second accommodating portions, thereby realizing the packaging of battery cells in the second accommodating portions with a simple structure.

[0020] Optionally, the first accommodating portion accommodates a first battery cell, and the cathode and anode of the first battery cell are respectively located at the two ends of the first battery cell along the second direction, and are staggered along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. Thus, the partition beams located on both sides of the first accommodating portion along the second direction can be fully utilized to accommodate the cathode and anode of the first battery cell, thereby improving the space utilization rate of the box. The cathode and anode of the first battery cell are staggered along the third direction, and the space of the partition beam along the second direction can be fully utilized to avoid structural interference between the electrodes of two adjacent first battery cells.

[0021] Optionally, the first accommodating portion and the second accommodating portion have different specifications; the first accommodating portion contains a first battery cell, the specifications of the first battery cell match the specifications of the first accommodating portion, and the second accommodating portion contains a second battery cell, the specifications of the second battery cell match the specifications of the second accommodating portion.

[0022] The two accommodating portions and two battery cells provided in the embodiment of the present application may differ in shape and / or size in any direction, thereby facilitating the quick and easy assembly of two or more battery cells of different shapes and sizes into the box, enriching the optional specifications of the battery cells in the battery and improving the flexibility of selecting multiple battery cells in the battery.

[0023] According to the second aspect of the present application, an embodiment of the present application further provides an electrical device, which includes a battery provided by any of the above embodiments, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0026] Figure 2 It is a schematic diagram of the exploded structure of a battery provided in one embodiment of the present application.

[0027] Figure 3 yes Figure 1 Schematic diagram of the structure of the battery box shown.

[0028] Figure 4 yes Figure 1 Schematic diagram of the internal structure of the first cover plate of the battery shown.

[0029] Figure 5 It is a partial structural schematic diagram of a battery provided in another embodiment of the present application.

[0030] In the attached figure:

[0031] Vehicle 1000, battery 100, controller 200, motor 300, box 10, bottom plate 11, first side plate 121, second side plate 122, third side plate 123, fourth side plate 124, partition beam 13, first accommodating portion 141, second accommodating portion 142, cover plate assembly 20, first cover plate 21, heat exchange flow channel 211, second cover plate 22, first plate body 221, second plate body 222, third plate body 223, battery cell 30, first battery cell 31, cathode 311, anode 312, second battery cell 32, first direction X, second direction Y, third direction Z DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein 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 figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, m and / or n can represent: m exists alone, m and n exist at the same time, and n exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0038] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] In the embodiments of the present application, "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "perpendicular" also includes not only the absolutely perpendicular situation, but also the roughly perpendicular situation conventionally recognized in engineering. For example, if the angle between two directions is 85°-90°, the two directions can be considered perpendicular; if the angle between two directions is 0°-5°, the two directions can be considered parallel.

[0041] In the embodiment of the present application, the battery cell may be a secondary battery cell, which refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0042] The battery cells can be lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-hydrogen battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc., which are not limited in the embodiments of the present application.

[0043] A battery cell generally includes an electrode assembly and a casing. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed 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 and negative electrodes from short-circuiting, and at the same time allow active ions to pass through. The casing is used to encapsulate components such as the electrode assembly and the electrolyte. The casing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film, etc.

[0044] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0045] 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. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0046] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0047] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0048] With the widespread application of batteries, the reliability of batteries has received more and more attention. In the related art, two battery modules arranged in two accommodating areas of the battery box are arranged on the same side. When one battery module has thermal runaway, there is a high risk that the heat will spread to the other battery module, resulting in a large area of ​​thermal runaway in the battery and low reliability. If a separator is added to the box, the processing technology of the box will be complicated and difficult to process.

[0049] Based on the above problems discovered by the inventors, the inventors have improved the structure of the battery. The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0050] The battery provided in the embodiment of the present application includes a box and a cover assembly. The box includes a plurality of accommodating parts, at least one side of each accommodating part is open to form an opening, and at least one battery cell is accommodated. The cover assembly is connected to the box and covers the openings of the plurality of accommodating parts to achieve the packaging of the battery cell. The opening directions of at least two of the plurality of accommodating parts are different, and optionally, the opening directions of any two adjacent accommodating parts of the plurality of accommodating parts are different. When a battery cell accommodated in one of the accommodating parts has thermal runaway, most of the heat diffuses outward through the opening of the accommodating part. Since the opening directions of at least two accommodating parts are different, the heat diffused outward when a battery cell accommodated in one of the accommodating parts has thermal runaway will not be quickly and more transferred to the accommodating part with a different opening, which greatly reduces the possibility that the battery cell accommodated in one of the accommodating parts will cause thermal runaway of the battery cell in at least one of the remaining accommodating parts at the same time, and greatly improves the reliability of the battery.

[0051] The battery provided in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. The power supply system of the electrical device can be composed of the battery disclosed in the present application, which is conducive to improving assembly efficiency.

[0052] The present application also provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0053] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0054] Figure 1 A schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. Figure 1 The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 may be provided 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. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0055] 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.

[0056] The present application also provides a battery 100, Figure 2 Schematic diagram of the exploded structure of a battery provided by an embodiment of the present application. Figure 2 The battery 100 provided in the embodiment of the present application includes a box body 10 and a cover plate assembly 20. The box body 10 includes a plurality of receiving parts, at least one side of each receiving part is open to form an opening, at least two of the plurality of receiving parts have different opening directions, and each receiving part contains at least one battery cell 30. The cover plate assembly 20 is connected to the box body 10 and covers the openings of the plurality of receiving parts.

[0057] The box body 10 may be an integrally formed structure having a plurality of accommodating portions, and the accommodating portions may be formed during the processing of the box body 10. Alternatively, the accommodating portions may be integrally stamped and formed with the box body 10, thereby simplifying the processing technology.

[0058] The structure of the accommodating portion may be a accommodating cavity or an accommodating groove, as long as it can accommodate the battery cell 30 .

[0059] The shape of the receiving portion can be a cuboid, a cylinder, a prism or other regular or irregular shapes.

[0060] The opening of the accommodating portion can be formed on one side of the accommodating portion. In this case, one side of the accommodating portion is open to facilitate the installation of the battery cell 30; the opening of the accommodating portion can also be formed on multiple different sides of the accommodating portion. In this case, multiple different sides of the accommodating portion are opened at the same time, and the battery cell 30 can be installed into it from multiple different sides of the accommodating portion.

[0061] Multiple accommodating parts can be arranged one by one in one direction or multiple directions to save space and improve the energy density of the battery 100. Multiple accommodating parts can also be arranged at a certain distance to better thermally isolate the battery cells 30 between different accommodating parts and improve the reliability of the battery 100.

[0062] The multiple accommodating parts can be arranged independently of each other, and the spaces between two adjacent accommodating parts are separated from each other and do not affect each other.

[0063] At least two of the multiple accommodating parts have different opening directions, which means that at least two of the multiple accommodating parts have different opening directions. For example, if the opening direction of one of the accommodating parts is toward a first direction, then the opening direction of at least one of the multiple accommodating parts is toward another direction different from the first direction, or the opening direction of at least one of the accommodating parts is not only toward the first direction, but also toward another direction different from the first direction.

[0064] At least two accommodating portions with different opening directions may be arranged adjacent to each other in sequence, or may be separated by other accommodating portions.

[0065] The receiving portion may only receive one battery cell 30 or may simultaneously receive a plurality of battery cells 30. The number of battery cells 30 received in each receiving portion may be the same or different, or may be partially the same and partially different.

[0066] The multiple battery cells 30 accommodated in the multiple accommodating parts can be connected in series, in parallel or in mixed connection. Mixed connection means that the multiple battery cells are connected in series and in parallel. The multiple battery cells can be electrically connected through a busbar component to achieve series connection, parallel connection or mixed connection between the multiple battery cells.

[0067] The cover plate assembly 20 may be any structural form capable of covering the openings of multiple receiving parts. The cover plate assembly 20 may include an integral cover plate or multiple independent cover plates. The specific structural form of the cover plate may be flexibly selected according to the opening direction of the receiving part. For example, when the receiving part is opened only to one side, the cover plate assembly 20 may include one or more flat cover plates; when the receiving part is opened to multiple openings, the cover plate assembly 20 may include one or more L-shaped or U-shaped cover plates.

[0068] The battery 100 provided in the embodiment of the present application includes a case 10 and a cover assembly 20. The case 10 includes a plurality of accommodating parts, wherein the opening directions of at least two accommodating parts are different, and each accommodating part accommodates at least one battery cell 30. The cover assembly 20 is connected to the case 10, and blocks the openings of the plurality of accommodating parts to achieve the packaging of the battery cells 30. When a battery cell accommodated in one of the accommodating parts experiences thermal runaway, most of the heat diffuses outward through the opening of the accommodating part. The heat diffused outward will not be quickly and more transferred to the accommodating parts with different opening directions, which greatly reduces the possibility that the battery cells in all other accommodating parts will simultaneously experience thermal runaway when the battery cell accommodated in one of the accommodating parts experiences thermal runaway, thereby greatly improving the reliability of the battery 100.

[0069] In some embodiments, opening directions of at least two of the plurality of receiving portions are opposite and / or intersecting.

[0070] Optionally, among the plurality of accommodating portions, at least two accommodating portions have opening directions opposite to each other. Exemplarily, the opening direction of one accommodating portion is downward, and the opening direction of the other accommodating portion is upward.

[0071] Optionally, among the plurality of accommodating portions, at least two accommodating portions have opening directions that intersect. Exemplarily, the opening direction of one accommodating portion is downward, and the opening direction of the other accommodating portion is leftward, rightward, forward or backward.

[0072] Optionally, among the plurality of accommodating portions, at least two accommodating portions have opening directions opposite and intersecting. Exemplarily, the opening direction of one accommodating portion is downward, and the opening direction of another accommodating portion is downward and forward, and so on.

[0073] At least two accommodating portions have openings in opposite directions. When a battery cell accommodated in one of the accommodating portions experiences thermal runaway, most of the heat diffuses outward through the opening of the accommodating portion. The direction of heat diffusion is opposite to the opening direction of at least one other accommodating portion, which at least does not cause thermal runaway of the battery cell in the other accommodating portion at the same time, thereby effectively improving the reliability of the battery 100.

[0074] The opening directions of at least two accommodating portions intersect with each other. When a battery cell accommodated in one of the accommodating portions experiences thermal runaway, most of the heat diffuses outward through the opening of the accommodating portion. The direction of heat diffusion intersects with the opening direction of at least one other accommodating portion, and similarly, thermal runaway will not occur in the battery cell in the other accommodating portion at the same time, thereby effectively improving the reliability of the battery 100.

[0075] In some embodiments, the plurality of accommodation portions are arranged along the second direction Y, and the opening directions of two adjacent accommodation portions along the second direction Y are different.

[0076] The opening directions of any two adjacent receiving portions along the second direction Y are not completely the same. Optionally, the opening directions of any two adjacent receiving portions along the second direction Y are opposite and / or intersecting.

[0077] In the embodiment of the present application, the opening directions of two adjacent accommodating portions along the second direction Y are set to be different. When a battery cell accommodated in any accommodating portion experiences thermal runaway, the heat diffused outward will not be transferred quickly and largely to other adjacent accommodating portions. This greatly reduces the possibility that thermal runaway of a battery cell accommodated in any accommodating portion will cause thermal runaway of battery cells in other adjacent accommodating portions at the same time, further improving the reliability of the battery.

[0078] Figure 3 yes Figure 1 The schematic diagram of the structure of the battery box shown. Figure 3In some embodiments, the box body 10 includes a bottom plate 11, at least one side plate and at least one partition beam 13. At least one side plate is connected to the bottom plate 11, and encloses the bottom plate 11 to form an internal space of the box body 10, and the internal space has an open side arranged opposite to the bottom plate 11 along the first direction X. At least one partition beam 13 is arranged in the internal space, and divides the internal space into a plurality of first accommodating portions 141 arranged at intervals along the second direction Y, and the second direction Y intersects the first direction X; a second accommodating portion 142 is formed inside each partition beam 13, and the plurality of accommodating portions include a first accommodating portion 141 and a second accommodating portion 142, and the second accommodating portion 142 has an opening direction different from that of the first accommodating portion 141.

[0079] At least one side panel is connected to the bottom plate 11 to form a cylindrical structure, the bottom of the cylindrical structure is the bottom plate 11, the side opposite to the bottom plate 11 forms an open side, and the interior of the cylindrical structure forms the internal space of the box body 10. The number of side panels can be one or more. Exemplarily, there can be one side panel, which can be a cylindrical structure, and the side panel and the bottom plate 11 are connected to form a cylindrical cylindrical structure. Exemplarily, there are multiple side panels, and multiple side panels are connected in sequence to form a frame, and the frame and the bottom plate 11 are connected to form a prismatic cylindrical structure. Optionally, there can be four side panels, and the side panels and the bottom plate 11 are connected to form a rectangular cylindrical structure. The side panels and the bottom plate 11 can be integrally formed.

[0080] At least one partition beam 13 is disposed inside the cylindrical structure, and divides the inside of the cylindrical structure into a plurality of first accommodating portions 141 arranged at intervals along the second direction Y. It can be understood that the opening direction of the first accommodating portion 141 is the same as the direction of the opening side of the internal space, which is the direction opposite to the bottom plate 11 along the first direction X.

[0081] A second accommodating portion 142 is formed inside each partition beam 13, and both sides of each partition beam 13 along the second direction Y are first accommodating portions 141, so the first accommodating portions 141 and the second accommodating portions 142 are alternately distributed along the second direction Y. That is, among the multiple accommodating portions arranged in sequence along the second direction Y, any two adjacent accommodating portions are respectively a first accommodating portion 141 and a second accommodating portion 142. The opening direction of the second accommodating portion 142 is different from that of the first accommodating portion 141, so that the opening directions of any two adjacent accommodating portions among the multiple accommodating portions arranged in sequence along the second direction Y are different, which greatly reduces the possibility that when a battery cell accommodated in any accommodating portion has thermal runaway, the battery cells in other adjacent accommodating portions will simultaneously have thermal runaway.

[0082] A groove may be punched out inside the partition beam 13 to form the second accommodating portion 142. The opening direction of the groove is the opening direction of the second accommodating portion 142. The opening direction of the second accommodating portion 142 may be along the first direction X toward the bottom plate 11, along any direction of the third direction Z, etc. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0083] The embodiment of the present application, by providing a partition beam 13, can, on the one hand, form a plurality of first accommodating portions 141 to accommodate a plurality of battery cells 30 in partitions, and the partition beam 13 can also improve the overall structural strength of the box body 10, thereby improving the structural stability and rigidity of the battery 100; on the other hand, a second accommodating portion 142 can be formed in each partition beam 13, which not only improves the space utilization rate of the battery 100, thereby improving the volume and energy density of the battery 100, but also can separate two adjacent first accommodating portions 141, so that the opening directions of any two adjacent accommodating portions are different, and the thermal runaway protection effect is better.

[0084] In some embodiments, the bottom plate 11, at least one side plate and at least one partition beam 13 are an integrally formed structure. That is, the box body 10 is an integrally formed structure, which simplifies the processing technology of the box body 10.

[0085] Optionally, the partition beam 13 and the second receiving portion 142 therein can be stamped by a stamping process, which simplifies the production process and improves the production efficiency of the battery 100 .

[0086] In some embodiments, at least one side panel includes a first side panel 121 and a second side panel 122 that are arranged opposite to each other along a second direction Y, and a third side panel 123 and a fourth side panel 124 that are arranged opposite to each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other, and the third side panel 123 and the fourth side panel 124 are connected between the first side panel 121 and the second side panel 122. The second accommodating portion 142 forms an opening in at least one of the bottom panel 11, the third side panel 123, and the fourth side panel 124.

[0087] The first side plate 121 and the second side plate 122 are parallel to each other, and the third side plate 123 and the fourth side plate 124 are parallel to each other. The first side plate 121 and the second side plate 122 are respectively connected with the third side plate 123 and the fourth side plate 124 to form a square frame.

[0088] Optionally, the second receiving portion 142 may form an opening on the bottom plate 11 , and in this case, the opening direction of the first receiving portion 141 is opposite to the opening direction of the second receiving portion 142 .

[0089] Optionally, the second accommodation portion 142 may form an opening on the third side plate 123 or the fourth side plate 124 , and in this case, the opening direction of the first accommodation portion 141 intersects with the opening direction of the second accommodation portion 142 .

[0090] Optionally, the second accommodating portion 142 may also form openings on the bottom plate 11 and the third side plate 123, or on the bottom plate 11 and the fourth side plate 124. In this case, part of the opening direction of the second accommodating portion 142 is opposite to the opening direction of the first accommodating portion 141, and part of the opening direction intersects with the opening direction of the first accommodating portion 141.

[0091] The embodiment of the present application provides four side panels, which facilitates flexible selection of the opening direction of the second accommodating portion 142 .

[0092] In some embodiments, reference Figure 2 and Figure 3 The second receiving portion 142 forms an opening in the bottom plate 11, the third side plate 123 and the fourth side plate 124. The cover plate assembly 20 includes at least one second cover plate 22, each of which is connected to the box body 10 and covers the opening of a corresponding second receiving portion 142.

[0093] The second receiving portion 142 forms openings on the bottom plate 11, the third side plate 123 and the fourth side plate 124, that is, the second receiving portion 142 forms openings on three different sides. The second cover plate 22 for covering the opening of the second receiving portion 142 should at least block the opening of the second receiving portion 142 on three different sides.

[0094] The number of the second cover plates 22 is the same as the number of the second receiving portions 142, and they correspond one to one. Each second cover plate 22 is used to cover the opening of a corresponding second receiving portion 142. The second cover plates 22 are arranged independently of each other.

[0095] Specifically, the second cover plate 22 may include a first plate body 221, a second plate body 222, and a third plate body 223 connected in sequence, the first plate body 221 and the third plate body 223 are arranged opposite to each other along the third direction Z, and are both perpendicular to the second plate body 222, so that the second cover plate 22 formed by this may be generally in a U-shaped structure. The first plate body 221 and the third plate body 223 respectively block the openings formed by the second accommodating portion 142 on the third side plate 123 and the fourth side plate 124, and the second plate body 222 blocks the opening formed by the second accommodating portion 142 on the bottom plate 11.

[0096] Each second cover plate 22 can be connected to the box body 10 by welding, bonding, riveting, clamping, etc. Specifically, the inner surfaces of the first plate body portion 221, the second plate body portion 222, and the third plate body portion 223 of the second cover plate 22 can be coated with colloid, and when the second cover plate 22 is assembled to the box body 10, the colloid is bonded to the outer surfaces of the bottom plate 11, the third side plate 123, and the fourth side plate 124 of the box body 10. A plurality of welding positions or screw connection holes can also be provided on the second cover plate 22, and the second cover plate 22 can be connected to the box body 10 by welding or screw connection, so that the connection is more stable.

[0097] The second receiving portion 142 of the embodiment of the present application forms an opening in the bottom plate 11, the third side plate 123 and the fourth side plate 124, so as to facilitate the installation of the battery cell 30 in the second receiving portion 142. The cover plate assembly 20 includes at least one second cover plate 22 corresponding to the second receiving portion 142. The at least one second receiving portion 142 is relatively independently covered by at least one second cover plate 22, which not only meets the packaging requirements of the battery cell 30, but also helps to reduce the total volume and total mass of the cover plate assembly 20, thereby reducing the total weight of the battery 100.

[0098] In some embodiments, the cover plate assembly 20 includes a first cover plate 21 , and the first cover plate 21 covers the opening side of the inner space. Each second cover plate 22 is connected to the first cover plate 21 .

[0099] Since the opening of each first receiving portion 141 is located at the opening side of the internal space, the first cover plate 21 covering the opening side of the internal space can cover the opening of each first receiving portion 141 .

[0100] Optionally, the first cover plate 21 may be a plate body whose size is comparable to the size of the opening side of the internal space. The openings of multiple first accommodating portions 141 may be covered simultaneously by one plate body, thereby simplifying the connection operation between the first cover plate 21 and the box body 10.

[0101] Optionally, the first cover plate 21 may also include a plurality of independent plates, each of which covers the opening of a corresponding first accommodating portion 141 , thereby saving plates at the location of the partition beam 13 and reducing the overall weight of the first cover plate 21 .

[0102] The first cover plate 21 can be connected to the box body 10 by welding, bonding, riveting, clamping, etc. Specifically, the first cover plate 21 can be coated with colloid around the periphery, and when the first cover plate 21 is assembled to the box body 10, the colloid is bonded to the edge of the opening side of the box body 10. The first cover plate 21 can also be provided with a plurality of welding positions or screw connection holes, and the first cover plate 21 is connected to the box body 10 by welding or screw connection, so that the connection is more stable.

[0103] Each second cover plate 22 is connected to the first cover plate 21 , which can improve the connection strength and firmness between the second cover plate 22 and the first cover plate 21 and prevent them from falling off easily.

[0104] The first plate body 221 and the third plate body 223 of the second cover plate 22 may be provided with a bending portion at one end along the first direction X, and the bending portion is overlapped to the first cover plate 21 and connected to the first cover plate 21 by welding, bonding, riveting, clamping, etc.

[0105] In some embodiments, the cover plate assembly 20 includes a first cover plate 21 , and the first cover plate 21 covers the open side of the inner space. Figure 4 yes Figure 1 The schematic diagram of the internal structure of the first cover plate of the battery shown in FIG. A heat exchange channel 211 is formed inside the first cover plate 21 for the heat exchange medium to flow.

[0106] Since the opening of each first receiving portion 141 is located at the opening side of the internal space, the first cover plate 21 covering the opening side of the internal space can cover the opening of each first receiving portion 141 .

[0107] The heat exchange medium flowing in the heat exchange channel 211 formed inside the first cover plate 21 can exchange heat with the battery cell 30 in the first accommodating portion 141, thereby providing heat for the battery cell 30 or taking away the heat dissipated by the battery cell 30, effectively improving the temperature of the battery cell 30 and improving the reliability of the battery 100.

[0108] Optionally, the heat exchange channel 211 may extend in a circuitous manner along an S-shaped curve in the first cover plate 21 to increase the heat exchange area between the heat exchange medium and the battery cell 30 , thereby improving the heat exchange efficiency and effect.

[0109] In some embodiments, the first receiving portion 141 receives the first battery cell 31 , and the second receiving portion 142 receives the second battery cell 32 ; under the same environmental parameters, the heat generation rate of the second battery cell 32 is lower than that of the first battery cell 31 .

[0110] Since the heat generated by the first battery cell 31 accommodated in the first accommodating portion 141 can be transferred away by the heat exchange medium flowing in the first cover plate 21, however, due to structural limitations, the first battery cell 31 accommodated in the second accommodating portion 142 cannot exchange heat with the heat exchange medium. Therefore, the second accommodating portion 142 can be used to accommodate the second battery cell 32 with a lower heat generation rate, thereby reducing the possibility of a large amount of heat accumulation and making the design more reasonable.

[0111] Optionally, the size of the first accommodating portion 141 along the second direction Y is larger than the size of the second accommodating portion 142 along the second direction Y, the size of the first accommodating portion 141 along the first direction X is equivalent to the size of the second accommodating portion 142 along the first direction X, and the size of the first accommodating portion 141 along the third direction Z is equivalent to the size of the second accommodating portion 142 along the third direction Z.

[0112] In some embodiments, the cover plate assembly 20 includes at least one first cover plate 21 , which is connected to the box body 10 at the opening side of the internal space and covers the openings of the plurality of first accommodating portions 141 .

[0113] Optionally, the first cover plate 21 may be a plate body whose size is comparable to the size of the opening side of the internal space. The openings of multiple first accommodating portions 141 may be covered simultaneously by one plate body, thereby simplifying the connection operation between the first cover plate 21 and the box body 10.

[0114] Optionally, the first cover plate 21 may also include a plurality of independent plates, each of which covers the opening of a corresponding first accommodating portion 141 , thereby saving plates at the location of the partition beam 13 and reducing the overall weight of the first cover plate 21 .

[0115] The first cover plate 21 can be connected to the box body 10 by welding, bonding, riveting, clamping, etc. Specifically, the first cover plate 21 can be coated with colloid around the periphery, and when the first cover plate 21 is assembled to the box body 10, the colloid is bonded to the edge of the opening side of the box body 10. The first cover plate 21 can also be provided with a plurality of welding positions or screw connection holes, and the first cover plate 21 is connected to the box body 10 by welding or screw connection, so that the connection is more stable.

[0116] The embodiment of the present application realizes the packaging of the battery cell in the first receiving portion 141 through at least one first cover plate 21 , and has a simple structure and is easy to assemble.

[0117] In some embodiments, the at least one partition beam includes a plurality of partition beams 13, and the plurality of accommodating portions include a plurality of second accommodating portions 142. The cover plate assembly 20 includes at least one second cover plate 22, which is connected to the box body 10 and covers the openings of the plurality of second accommodating portions 142, thereby realizing the packaging of the battery cells in the second accommodating portions 142 with a simple structure.

[0118] Optionally, the number of the second cover plate 22 may be one, and the second cover plate 22 covers the openings of a plurality of second accommodating portions 142 at the same time.

[0119] Optionally, the number of the second cover plates 22 may be multiple, and the number of the second cover plates 22 may be the same as the number of the second receiving portions 142, and each second cover plate 22 covers the opening of a corresponding second receiving portion 142. The number of the second cover plates 22 may also be less than the number of the second receiving portions 142, and each second cover plate 22 covers the openings of two or more corresponding second receiving portions 142.

[0120] Figure 5 It is a partial structural diagram of a battery provided by another embodiment of the present application. In some embodiments, the first receiving portion 141 accommodates a first battery cell 31, and the cathode 311 and the anode 312 of the first battery cell 31 are respectively located at two ends of the first battery cell 31 along the second direction Y, and are staggered along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0121] A plurality of first battery cells 31 may be accommodated in the first receiving portion 141 , and the plurality of first battery cells 31 may be stacked along the second direction Y.

[0122] In the embodiment of the present application, the cathode 311 and the anode 312 of the first battery cell 31 are respectively arranged at the two ends of the first battery cell 31 along the second direction Y, and the partition beams 13 located at both sides of the first accommodating portion 141 along the second direction Y can be fully utilized to accommodate the cathode 311 and the anode 312 of the first battery cell 31, thereby improving the space utilization rate of the box body 10. The cathode 311 and the anode 312 of the first battery cell 31 are staggered along the third direction Z, and the space of the partition beam 13 along the second direction Y can be fully utilized to avoid structural interference between the electrodes of two adjacent first battery cells 31.

[0123] In some embodiments, the first receiving portion 141 and the second receiving portion 142 have different specifications. The first receiving portion 141 contains the first battery cell 31, and the specifications of the first battery cell 31 match the specifications of the first receiving portion 141. The second receiving portion 142 contains the second battery cell 32, and the specifications of the second battery cell 32 match the specifications of the second receiving portion 142.

[0124] The specification parameters may include at least one of a shape, a size along a first direction X, a size along a second direction Y, and a size along a third direction Z, wherein the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0125] The first receiving portion 141 and the second receiving portion 142 may have different shapes. Accordingly, the first battery cell 31 and the second battery cell 32 may have different shapes. The shape of the first battery cell 31 matches the shape of the first receiving portion 141, and the shape of the second battery cell 32 matches the shape of the second receiving portion 142. Exemplarily, the first receiving portion 141 and the first battery cell 31 may be rectangular parallelepiped; the second receiving portion 142 and the second battery cell 32 may be cylindrical or semi-cylindrical.

[0126] The first receiving portion 141 and the second receiving portion 142 may also have different sizes. Accordingly, the first battery cell 31 and the second battery cell 32 may have different sizes, the size of the first battery cell 31 matches the size of the first receiving portion 141, and the size of the second battery cell 32 matches the size of the second receiving portion 142.

[0127] The two accommodating portions and two battery cells provided in the embodiment of the present application may differ in shape and / or size in any direction, so as to facilitate the quick and easy assembly of two or more battery cells of different shapes and sizes into the box body 10, thereby enriching the optional specifications of the battery cells in the battery 100 and improving the flexibility of selection of multiple battery cells in the battery 100.

[0128] The embodiment of the present application provides a battery 100, including a box body 10 and a cover plate assembly 20. The box body 10 forms a plurality of first accommodating parts 141 and a plurality of second accommodating parts 142 through a partition beam 13, at least one side of each first accommodating part 141 and each second accommodating part 142 is open to form an opening, and accommodates at least one battery cell 30. The cover plate assembly 20 is connected to the box body 10, and covers the openings of the plurality of first accommodating parts 141 and the plurality of second accommodating parts 142 to achieve the packaging of the battery cell 30. The opening directions of the first accommodating part 141 and the second accommodating part 142 are different. When the battery cell accommodated in the first accommodating part 141 has thermal runaway, most of the heat diffuses outward through the opening of the first accommodating part 141. The opening direction of the second accommodating portion 142 is different from that of the first accommodating portion 141. Therefore, when a battery cell accommodated in one of the first accommodating portions 141 experiences thermal runaway, the heat diffused outward will not be quickly and largely transferred to the second accommodating portion 142 with a different opening from the first accommodating portion. This greatly reduces the possibility that thermal runaway of a battery cell accommodated in one of the accommodating portions will cause thermal runaway of battery cells in at least one of the remaining accommodating portions at the same time, thereby greatly improving the reliability of the battery 100.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A box body, the box body comprising a plurality of accommodating parts, at least one side of each accommodating part is open to form an opening, at least two of the plurality of accommodating parts have opening directions different from each other, and each accommodating part accommodates at least one battery cell; as well as The cover plate assembly is connected to the box body and covers the openings of the plurality of accommodating portions.

2. The battery according to claim 1, characterized in that The opening directions of at least two of the plurality of accommodation portions are opposite and / or intersecting.

3. The battery according to claim 1, characterized in that The plurality of accommodation portions are arranged along a second direction, and opening directions of two adjacent accommodation portions along the second direction are different.

4. The battery according to claim 1, characterized in that The box body comprises a bottom plate, at least one side plate and at least one partition beam; The at least one side plate is connected to the bottom plate and encloses the bottom plate to form an internal space of the box body, wherein the internal space has an opening side arranged opposite to the bottom plate along a first direction; The at least one partition beam is arranged in the internal space, and divides the internal space into a plurality of first accommodating portions arranged at intervals along a second direction, wherein the second direction intersects with the first direction; a second accommodating portion is formed inside each of the partition beams, and the plurality of accommodating portions include the first accommodating portion and the second accommodating portion, and the opening direction of the second accommodating portion is different from that of the first accommodating portion.

5. The battery according to claim 4, characterized in that The bottom plate, the at least one side plate and the at least one partition beam are an integrally formed structure.

6. The battery according to claim 4, characterized in that The at least one side panel comprises a first side panel and a second side panel arranged opposite to each other along the second direction, and a third side panel and a fourth side panel arranged opposite to each other along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other, and the third side panel and the fourth side panel are connected between the first side panel and the second side panel; The second accommodation portion forms an opening in at least one of the bottom plate, the third side plate, and the fourth side plate.

7. The battery according to claim 6, characterized in that The second accommodating portion forms an opening on the bottom plate, the third side plate and the fourth side plate; The cover plate assembly includes at least one second cover plate, each of which is connected to the box body and covers an opening of a corresponding second accommodating portion.

8. The battery according to claim 7, characterized in that The cover plate assembly includes a first cover plate, and the first cover plate covers the opening side of the internal space; Each of the second cover plates is connected to the first cover plates.

9. The battery according to claim 4, characterized in that The cover plate assembly includes a first cover plate, and the first cover plate covers the opening side of the internal space; A heat exchange channel for heat exchange medium to flow is formed inside the first cover plate.

10. The battery according to claim 9, characterized in that The first accommodating portion accommodates a first battery cell, and the second accommodating portion accommodates a second battery cell; under the same environmental parameters, the heat generation rate of the second battery cell is lower than the heat generation rate of the first battery cell.

11. The battery according to claim 4, characterized in that The cover plate assembly includes at least one first cover plate, and the at least one first cover plate is connected to the box body at the opening side of the internal space and covers the openings of the plurality of first accommodating portions.

12. The battery according to claim 4, characterized in that The at least one partition beam comprises a plurality of the partition beams, and the plurality of accommodation portions comprises a plurality of the second accommodation portions; The cover plate assembly includes at least one second cover plate, and the at least one second cover plate is connected to the box body and covers the openings of the plurality of second accommodating portions.

13. The battery according to claim 4, characterized in that The first accommodating portion accommodates a first battery cell, a cathode and an anode of the first battery cell are respectively located at two ends of the first battery cell along the second direction and staggered along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

14. The battery according to claim 4, characterized in that The first accommodating portion and the second accommodating portion have different specification parameters; The first receiving portion contains a first battery cell, and the specification parameters of the first battery cell match the specification parameters of the first receiving portion. The second receiving portion contains a second battery cell, and the specification parameters of the second battery cell match those of the second receiving portion.

15. An electrical device, characterized in that: The invention comprises a battery according to any one of claims 1 to 14, wherein the battery is used to provide electrical energy.

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