Battery case, battery, electric device

Abstract

The application provides a battery box, a battery and a power utilization device. The battery box comprises a first box plate and a second box plate. The first box plate comprises a first positioning part; the second box plate comprises a second positioning part matched with the first positioning part; the first positioning part and the second positioning part are used for butt joint positioning of the first box plate and the second box plate, so that the first box plate and the second box plate form a containing space for containing an electric core assembly.

Description

Technical Field

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

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

[0003] A battery consists of cell modules and a battery casing that houses them. The battery casing helps with ventilation and heat dissipation, provides insulation and waterproofing, and protects the battery from impacts; it is a crucial component of the battery. Battery casing assembly is a vital step in the module assembly process, significantly impacting battery quality and manufacturing time. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the background art. To this end, one object of this application is to provide a battery housing, a battery, and an electrical device to reduce the difficulty of assembling the battery housing.

[0005] An embodiment of the first aspect of this application provides a battery housing, which includes a first housing plate and a second housing plate. The first housing plate includes a first positioning part; the second housing plate includes a second positioning part that cooperates with the first positioning part. The first positioning part and the second positioning part are used for docking and positioning the first housing plate and the second housing plate so that the first housing plate and the second housing plate form a receiving space for accommodating battery cell components.

[0006] In the technical solution of this application embodiment, the cooperation between the first positioning part and the second positioning part is conducive to more convenient and reliable docking and positioning of the first box plate and the second box plate, reducing assembly difficulty, reducing reliance on visual inspection positioning, and improving assembly efficiency.

[0007] In some embodiments, the first housing plate includes a first end plate and a second end plate disposed opposite to each other along a first direction, and at least one of the first end plate and the second end plate is provided with a first positioning part; the second housing plate includes a first side plate and a second side plate disposed opposite to each other along a second direction, and at least one of the first side plate and the second side plate is provided with a second positioning part, wherein the first direction is perpendicular to the second direction. The battery housing surrounding the cell assembly is formed by splicing the oppositely disposed end plates and side plates, facilitating the assembly and manufacturing of the battery module. The positioning by the cooperation of the first positioning part and the second positioning part reduces the accuracy requirements for plate mating inspection.

[0008] In some embodiments, the first end plate includes opposing first and second end faces, and the second end plate includes opposing third and fourth end faces. The first and third end faces are respectively mated with the first side plate, and the second and fourth end faces are respectively mated with the second side plate. At least one of the first and third end faces is provided with a first positioning portion, and / or at least one of the second and fourth end faces is provided with a first positioning portion. The first side plate and / or the second side plate is provided with a second positioning portion. By setting the first positioning portion on the end face of the end plate and the second positioning portion correspondingly set on the side of the side plate, it is beneficial to simplify the setting of the mating structure, eliminating the need for additional mating structures and effectively utilizing the accommodating space formed by the end face and the side plate to better accommodate the battery cell assembly.

[0009] In some embodiments, one of the first positioning part and the second positioning part includes at least one protrusion protruding from the base surface, and the other of the first positioning part and the second positioning part includes at least one groove recessed into the base surface. The base surface is the surface of the component where the first positioning part or the second positioning part is located, and the cross-sectional shape of the groove matches the cross-sectional shape of the protrusion. Using a protrusion and a groove respectively for the first positioning part and the second positioning part to achieve docking positioning is more conducive to the initial positioning when the end plate and the side plate are docked, thereby reducing the requirement for docking accuracy and improving the load-bearing capacity of the connection structure between the end plate and the side plate.

[0010] In some embodiments, the cross-section of the protrusion is triangular, square, rectangular, trapezoidal, or semi-circular; the cross-sectional shape of the groove is the same as that of the protrusion. Regularly shaped protrusions and grooves facilitate processing and reduce costs. By setting the cross-sectional shapes of the protrusion and groove to be the same, a more stable mating and positioning can be achieved, preventing large gaps between them from weakening the structure's load-bearing capacity.

[0011] In some embodiments, the width of the protrusion gradually decreases and the width of the groove gradually increases along the direction away from the base surface. Setting the protrusion with a cross-sectional shape that is smaller at the top and larger at the bottom facilitates the splicing of the groove and the protrusion. At the same time, the cross-sectional shape that is smaller at the top and larger at the bottom can effectively increase the structural strength of the root of the protrusion and prevent the root from being damaged under shear force.

[0012] In some embodiments, the protrusion includes a first surface away from the base surface, and a second and a third surface respectively connecting the two ends of the first surface to the base surface, wherein the first, second, and third surfaces are all planar. Making the first, second, and third surfaces of the protrusion planar increases the contact area when the protrusion mates with the groove, resulting in uniform stress distribution at the connection between the end plate and the side plate after connection, mitigating localized structural damage caused by uneven stress distribution. Furthermore, making all three surfaces of the protrusion and groove mates planar simplifies and facilitates the processing of the end plate and side plate.

[0013] In some embodiments, the first surface is parallel to the base surface, and the first angle formed by the first surface and the second surface is α1, the second angle formed by the first surface and the third surface is α2, and 105°≤α1≤165°, 105°≤α2≤165°. By selecting an appropriate range of included angle values, the contact surfaces of the groove and the protrusion can provide a suitable resistance and facilitate the assembly of the protrusion and the groove.

[0014] In some embodiments, the first angle and the second angle are equal. The symmetrical structure facilitates positioning and assembly, and also ensures that the end plates at both ends of the battery housing experience uniform stress for more robust support.

[0015] In some embodiments, the maximum height of the protrusion is h1 in the direction perpendicular to the base surface, and the maximum width of the protrusion is b in the direction parallel to the base surface, and 0

[0016] In some embodiments, the maximum height h1 and the maximum width b of the protrusion satisfy the condition: 0.5b ≤ h1 ≤ 0.9b. A well-designed dimensional relationship between the height and width of the protrusion can give the protrusion shape superior mechanical properties, balancing the strength of the protrusion itself with the reliability of the connection between the protrusion and the groove.

[0017] In some embodiments, the second positioning part includes a groove with a maximum depth of h2 and a thickness of H on the side plate where the groove is located, wherein 0.25H ≤ h2 ≤ 0.75H. Selecting an appropriate maximum groove depth can ensure the structural strength of the side plate itself while making the groove and protrusion firmly and stably joined.

[0018] In some embodiments, the maximum depth h2 of the groove and the thickness H of the side plate satisfy 0.4H ≤ h2 ≤ 0.6H. Properly designing the groove dimensions can better balance the strength of the side plate and the reliability of the connection between the groove and the protrusion.

[0019] In some embodiments, the first housing plate is provided with a first connecting hole, and the second housing plate is provided with a second connecting hole. The first connecting hole and the second connecting hole are used for connection by fasteners. The connection by fasteners in conjunction with the cooperation of the first positioning part and the second positioning part not only facilitates the docking, positioning and connection between the various plates of the battery housing, but also distributes the force generated by the expansion of the battery cells, making the connection between the first housing plate and the second housing plate more firm and tight, improving the load-bearing capacity of the assembled battery housing, and making the overall structure more balanced and reasonable in terms of stress.

[0020] ​In some embodiments, the first connecting hole is offset from the first positioning part, and the second connecting hole is offset from the second positioning part. This offset arrangement avoids mutual interference, and especially when subjected to shear forces, the first and second positioning parts can reduce the shear force on the fasteners, improving the strength of the housing structure and the reliability of the connection.

[0021] In some embodiments, the first positioning part includes a plurality of spaced protrusions, and the first connecting hole is located between two adjacent protrusions; the second positioning part includes a plurality of spaced grooves, and the second connecting hole is located between two adjacent grooves. Positioning the holes between adjacent protrusions and / or grooves, staggered from the positioning parts to avoid mutual interference, and ensuring that the shear force provided by the fasteners and the resistance between the protrusions and grooves can jointly resist the module expansion force, resulting in a more balanced and reasonable overall structural stress distribution.

[0022] An embodiment of the second aspect of this application provides a battery, including the battery housing as described in the above embodiments, and a cell assembly housed within the battery housing. The first housing plate and the second housing plate of the battery housing are positioned by docking via a first positioning part and a second positioning part, reducing assembly difficulty and improving the efficiency of housing docking in the module assembly process.

[0023] In some embodiments, the battery further includes a buffer pad located between the first housing plate and the cell assembly. The buffer pad can fill the gap between the first housing plate and the cell assembly, which helps to maintain the positioning of the cell assembly or individual battery cells inside the battery housing. At the same time, it can provide sufficient positioning adjustment margin between the first housing plate and the second housing plate of the battery housing, facilitating subsequent docking and positioning.

[0024] A third aspect of this application provides a method for manufacturing a battery, comprising: arranging a cell assembly between a first housing plate and a second housing plate; aligning a second positioning portion on the second housing plate with a first positioning portion on the first housing plate to achieve docking positioning of the first housing plate and the second housing plate; and fixing the first housing plate and the second housing plate together. By setting the first positioning portion and the second positioning portion to achieve docking positioning, the reliance on visual inspection equipment is reduced, avoiding the increase in assembly costs due to cumbersome inspection equipment.

[0025] In some embodiments, the first housing plate includes a first end plate and a second end plate disposed opposite to each other along a first direction, at least one of the first end plate and the second end plate being provided with a first positioning portion; the second housing plate includes a first side plate and a second side plate disposed opposite to each other along a second direction, at least one of the first side plate and the second side plate being provided with a second positioning portion. Arranging the cell assembly between the first housing plate and the second housing plate further includes: providing a buffer plate, which is disposed between the cell assembly and the first end plate, and / or between the cell assembly and the second end plate. The buffer plate has compressibility and resilience, and can fill the gap between the first housing plate and the cell assembly, which is beneficial for maintaining the positioning of the cell assembly inside the battery housing. It also provides sufficient positioning adjustment margin between the first housing plate and the second housing plate of the battery housing, facilitating subsequent docking and positioning.

[0026] In some embodiments, the buffer plate includes a first buffer plate and a second buffer plate, and arranging the cell assembly between the first housing plate and the second housing plate includes: fixing the first end plate and arranging the first end plate, the first buffer plate, the cell assembly, the second buffer plate, and the second end plate sequentially along a first direction; applying pressure to the outer side of the second end plate away from the first end plate to compress the gap between the first end plate and the second end plate to a preset distance. The elasticity of the buffer pad provides sufficient adjustment space between the first end plate and the second end plate, allowing the gap to be adjusted by applying pressure to correspond to the position of the second positioning portion on the first and second side plates of the second housing plate for docking and positioning. Applying pressure to the two end plates also helps to increase the holding force of the cell assembly and maintain the stability of the battery structure connection.

[0027] In some embodiments, aligning the second positioning portion on the second housing plate with the first positioning portion on the first housing plate to achieve docking positioning of the first housing plate and the second housing plate includes: aligning and engaging the second positioning portion on the second housing plate with the first positioning portion on the first housing plate; applying a preset pressure to the surface of the second housing plate facing away from the first housing plate to complete the docking positioning. By applying a certain pressure, the two cooperating contact surfaces can provide a guiding effect, allowing the misalignment deviation of the first positioning portion and the second positioning portion to be further adjusted to a more accurate alignment position under external pressure by utilizing the cooperation of the contact surfaces, facilitating subsequent fastening connection.

[0028] In some embodiments, the fixed connection of the first housing plate and the second housing plate includes: fixing the first housing plate and the second housing plate together with fasteners.

[0029] An embodiment of the fourth aspect of this application provides an electrical device comprising the battery described in the above embodiments, the battery being used to provide electrical energy. It includes the battery described in the above embodiments or a battery prepared by the preparation method described in the above embodiments, the battery being used to provide electrical energy.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0032] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0033] Figure 2 This is an exploded structural diagram of a battery according to some embodiments of this application;

[0034] Figure 3 This is a schematic diagram of the battery housing structure according to some embodiments of this application;

[0035] Figure 4 Exploded views of the battery housing according to some embodiments of this application;

[0036] Figure 5 This is a partial structural diagram of the first end plate and the first side plate according to some embodiments of this application;

[0037] Figure 6 This is a partial stress diagram of the joint between the first end plate and the first side plate in some embodiments of this application;

[0038] Figure 7 This is a schematic diagram of the battery structure of some embodiments of this application;

[0039] Figure 8 Exploded views of the battery structure of some embodiments of this application;

[0040] Figure 9 This is a flowchart illustrating a battery fabrication method according to some embodiments of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1000 vehicles;

[0043] Battery 100, controller 200, motor 300, battery box 400, cell assembly 500, buffer pad 600, fastener 700;

[0044] Box body 10, first part 11, second part 12; battery cell 20;

[0045] First housing plate 410, second housing plate 420, first positioning part 430, second positioning part 440, first side plate 421, second side plate 422, protrusion 431, groove 441, first connecting hole 432, second connecting hole 442, first end plate 411, first end face 4111, second end face 4112, second end plate 412, third end face 4121, fourth end face 4122, first face 4311, second face 4312, third face 4313, first side face 4211;

[0046] First angle α1, second angle α2, included angle β, base planes S1 and S2. Detailed Implementation

[0047] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0053] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0054] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0055] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0056] The applicant notes that the battery casing can be assembled from multiple panels. During the battery module manufacturing stage, the battery cell assembly is assembled together with the casing panels to form a whole. Due to the large number of components involved, the assembly of the battery casing often requires the installation and positioning of multiple components. For example, vision inspection equipment is used to detect the installation positions between parts, thereby controlling a robotic arm to move the parts to the corresponding positions for docking and installation.

[0057] The panels constituting the battery casing are typically connected by fasteners, requiring charge-coupled devices (CCDs) to visually inspect the bolt holes for accurate alignment. However, the large number of bolt holes and the high precision required for inspection increase the difficulty and cost of assembly. Therefore, the applicant has discovered that self-positioning between components can be achieved by incorporating interlocking connection structures between the battery casing panels. This reduces reliance on visual inspection equipment and improves the efficiency of automated assembly.

[0058] Because the dimensions of a battery may change during use, such as through expansion and deformation, this can exert forces on the battery casing structure, such as creating significant shear forces on fasteners, affecting structural stability and battery safety. By incorporating interlocking connection structures between the battery casing panels, the forces borne by the fasteners can be distributed, improving product reliability.

[0059] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using battery cells and batteries disclosed in this application. This helps to mitigate battery structure deformation caused by cell expansion and improves the stability of the battery structure.

[0060] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0061] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0062] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0063] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0064] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0065] In battery 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner to form a cell assembly, which is then housed within housing 10. Alternatively, battery 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form a battery module, which is then connected in series, parallel, or in a mixed manner to form a complete cell assembly, also housed within housing 10. Battery 100 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells 20.

[0066] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0067] Please refer to Figure 3 and Figure 4 , Figure 3 This is a structural diagram of the battery housing 400 provided in some embodiments of this application. Figure 4 This is an exploded view of a battery housing 400 provided in some embodiments of this application. The battery housing 400 includes a first housing plate 410 and a second housing plate 420. The first housing plate 410 includes a first positioning part 430; the second housing plate 420 includes a second positioning part 440 that cooperates with the first positioning part 420. The first positioning part 430 and the second positioning part 440 are used for docking and positioning the first housing plate 410 and the second housing plate 420 so that the first housing plate 410 and the second housing plate 420 form a receiving space for accommodating battery cell assemblies.

[0068] The first housing plate 410 and the second housing plate 420 are assembled to form a receiving space, within which the battery cell assembly can be placed. In some examples, for example... Figure 3 As shown, the first box panel 410 and the second box panel 420 can be multiple flat panels, and the accommodating space formed by splicing them together can be a cavity with an opening.

[0069] In some examples, the first box panel 410 and the second box panel 420 can be non-planar materials, such as materials with an "L" shaped cross-section, so that the first box panel 410 and the second box panel 420 can be spliced ​​together to form a square or rectangular box.

[0070] In other examples, the first housing panel 410 and the second housing panel 420 can also be irregularly shaped plates that overlap each other to form a sealed enclosure space. For example, the first housing panel 410 can be... Figure 2In the example of the first part 10, the second box panel 420 can be Figure 2 Example from Part 20 of the document.

[0071] The first positioning part 430 and the second positioning part 440 are a connection structure that cooperates with each other to achieve positioning, such as a concave-convex fitting structure, in which one is a protrusion and the other is a groove, and the shapes of the two are matched to achieve a fitting connection.

[0072] The cooperation between the first positioning part 430 and the second positioning part 440 facilitates the easier and more reliable docking and positioning of the first housing plate 410 and the second housing plate 420, reduces the reliance on visual inspection positioning, and improves assembly efficiency.

[0073] Please refer to Figure 4 In some embodiments, the first housing plate 410 includes a first end plate 411 and a second end plate 412 disposed opposite to each other along a first direction X, and at least one of the first end plate 411 and the second end plate 412 is provided with a first positioning portion 430. The second housing plate 420 includes a first side plate 421 and a second side plate 422 disposed opposite to each other along a second direction Y, and at least one of the first side plate 421 and the second side plate 422 is provided with a second positioning portion 440.

[0074] The first housing plate 410 and the second housing plate 420 each include two spaced flat plates, and the four flat plates are connected in sequence to form an accommodating space. The first direction X and the second direction Y can be two intersecting directions on a horizontal plane; in some examples, the first direction X and the second direction Y can be perpendicular. One of the first end plate 411 and the second end plate 412 may have a first positioning part 430, so that one or two corresponding parts of the first side plate 421 and the second side plate 422 have second connecting parts 440 for docking and positioning during connection. In some examples, the first end plate 411 and the second end plate 412 may each have a first positioning part 430 simultaneously, and the corresponding first side plate and second side plate may also have second positioning parts 440 simultaneously.

[0075] The battery box, which surrounds the battery cell assembly, is formed by splicing the relatively set end plates and side plates, which facilitates the assembly and manufacturing of the battery module. The positioning by the cooperation of the first positioning part and the second positioning part reduces the detection accuracy requirements of the plate docking.

[0076] In some embodiments, the first end plate 411 includes a first end face 4111 and a second end face 4112 opposite to each other, and the second end plate 412 includes a third end face 4121 and a fourth end face 4122 opposite to each other. The first end face 4111 and the third end face 4121 are respectively connected to the first side plate 421, and the second end face 4112 and the fourth end face 4122 are respectively connected to the second side plate 422. At least one of the first end face 4111 and the third end face 4121 is provided with a first positioning part 430, and / or at least one of the second end face 4112 and the fourth end face 4122 is provided with a first positioning part 430. The first side plate 421 and / or the second side plate 422 are provided with a second positioning part 440.

[0077] The two ends of the first end plate 411 and the second end plate 412 respectively abut against the first side plate 421 and the second side plate 422. Correspondingly, a first positioning part 430 is disposed on the end face of the first end plate 411 and / or the second end plate 412, and a second positioning part 440 is disposed on the side surface of the first side plate 421 and / or the second side plate 422 facing the first end plate 411 and the second end plate 412. The first positioning part 430 and the second positioning part 440 are provided in a one-to-one correspondence to meet the need for mutual cooperation to achieve docking and positioning.

[0078] By setting the first positioning part 430 on the end face of the end plate and the second positioning part 440 on the side of the side plate, it is beneficial to simplify the setting of the docking structure. There is no need to set up an extra docking structure, and the accommodating space formed by the end face and the side plate is effectively utilized to better accommodate the battery cell assembly.

[0079] Figure 5 This is a partial structural diagram of the first end plate and the first side plate provided for some embodiments of this application. For example... Figure 5 As shown, in some embodiments, one of the first positioning part 430 and the second positioning part 440 includes at least one protrusion 431 protruding from the base surface S1, and the other of the first positioning part 430 and the second positioning part 440 includes at least one groove 441 recessed into the base surface S2. The base surface is the component surface where the first positioning part or the second positioning part is located, and the cross-sectional shape of the groove 441 is adapted to the cross-sectional shape of the protrusion 431.

[0080] The first positioning part 430 and the second positioning part 440 are a mating connection structure of a protrusion and a groove. In the example, the cross-sectional shape of the groove 441 and the cross-sectional shape of the protrusion 431 are adapted to each other, which means that the cross-sectional shapes of the two can match each other to achieve snap-fit ​​positioning. For example, the cross-sectional dimensions of the two can be the same, or they can be similar (same shape, different proportion) to facilitate snap-fit, or they can be different shapes, as long as the snap-fit ​​positioning requirements are met.

[0081] By setting the first positioning part 430 and the second positioning part 440 as a protrusion and a groove respectively to achieve docking positioning, it is more conducive to the initial positioning when the end plate and the side plate are docked, thereby reducing the requirements for docking accuracy. On the other hand, when the groove and protrusion structure are matched, it can also improve the load-bearing capacity of the connection structure between the end plate and the side plate. In particular, when the cell assembly inside the battery expands and deforms, the end plate and the side plate of the battery box will be subjected to a large shear force. The connection of the protrusion and the groove can bear a large shear force, which can enhance the structural strength of the box and improve the stability of the structural connection.

[0082] In some embodiments, the cross-section of the protrusion 431 is triangular, square, rectangular, trapezoidal or semi-circular; the cross-sectional shape of the groove 441 is the same as that of the protrusion 431.

[0083] The fact that the cross-sectional shape of the groove 441 is the same as that of the protrusion 431 means that the cross-sectional dimensions of the protrusion and the groove are the same. It is understood that since the groove 441 and the protrusion 431 are detachably connected, any dimensional differences caused by machining errors or fit tolerances should also be considered to fall within the same range as in this embodiment. The number of protrusions can be one or more. Multiple protrusions can be arranged continuously, such as continuously arranged triangular protrusions, trapezoidal protrusions, or semi-circular protrusions. Multiple protrusions can also be arranged at intervals, such as spaced rectangular protrusions.

[0084] Regularly shaped protrusions and grooves facilitate processing and reduce processing costs. By setting the cross-sectional shape of the protrusions and the cross-sectional shape of the grooves to be the same, it is beneficial to achieve a more stable docking and positioning, and to avoid large gaps between them that would weaken the load-bearing capacity of the structure.

[0085] In some embodiments, the width of the protrusion 431 gradually decreases and the width of the groove 441 gradually increases along the direction away from the base surface.

[0086] Figure 5 This is a partial structural diagram of the first end plate and the first side plate provided for some embodiments of this application. For example... Figure 5As shown, the first end face 4111 of the first end plate 411 has two spaced protrusions 431, and the first side face 4211 of the first side plate 421 has two spaced grooves 441. The protrusions 431 protrude in the second direction Y relative to the base surface S1 where the first end face 4111 is located, and the grooves 441 are recessed in the second direction Y relative to the base surface S2 where the first side face 4211 is located. The width of the protrusion refers to the dimension along the first direction X parallel to the plane where the base surface is located. Along the second direction Y, the width of the protrusion 431 gradually decreases. For example, the width of the top of the protrusion 431 furthest from the base surface S1 is B1, and the width of the root of the protrusion 431 connecting with the base surface S1 is B2. Along the second direction Y, the width of the protrusion 431 gradually decreases from B2 to B1, exhibiting a cross-sectional shape that is smaller at the top and larger at the bottom. In some examples, the change in the width of the protrusion 431 can be linear or non-linear.

[0087] Understandably, the cross-sectional shape of the groove matches the cross-sectional shape of the protrusion. When the cross-sectional shape of the protrusion 431 is smaller at the top and larger at the bottom, the corresponding cross-sectional shape of the groove 441 also has an opening width greater than the bottom width. Thus, when the two are combined, the force acting on the contact surface of the protrusion and groove intersects with the second direction Y, allowing the protrusion and groove to provide resistance force F3 to resist the shear force F1 generated by the expansion of the battery cell assembly. The cross-sectional shape of smaller at the top and larger at the bottom gives the root of the protrusion strong structural strength, which helps to prevent the root from being damaged under the action of shear force.

[0088] By setting the protrusion to a cross-sectional shape that is smaller at the top and larger at the bottom, it is easier for the groove 441 and the protrusion 431 to be spliced ​​together. At the same time, this structural shape can make the contact surface of the protrusion and the groove form a guide surface, which can further adjust the docking position to complete the splicing when the positioning accuracy is not very precise. In addition, the cross-sectional shape that is smaller at the top and larger at the bottom helps to avoid damage to the root under the action of shear force.

[0089] In some embodiments, such as Figure 5 As shown, the protrusion 431 includes a first surface 4311 away from the base surface S1, and a second surface 4312 and a third surface 4313 respectively connecting the two ends of the first surface 4311 to the base surface S1. The first surface 4311, the second surface 4312 and the third surface 4313 are all planar.

[0090] Setting the first surface 4311, the second surface 4312, and the third surface 4313 of the protrusion 431 to be flat increases the contact area when the protrusion mates with the groove, making the force at the connection between the end plate and the side plate uniform and avoiding local structural damage caused by uneven force. At the same time, setting the three surfaces of the protrusion and the groove to be flat makes the processing of the end plate and the side plate simple and convenient.

[0091] In some embodiments, the first surface 4311 is parallel to the base surface S1, and the first angle formed by the first surface 4311 and the second surface 4312 is . The second angle formed by the first surface 4311 and the third surface 4313 is ,and, , .

[0092] Figure 6 This is a partial force diagram of the joint between the first end plate and the first side plate provided in some embodiments of this application. The first surface 4311 of the protrusion 431 is set to be parallel to the base surface S1. After the protrusion 431 and the groove 441 are joined, the first surface 4311 corresponds to the bottom surface of the first side plate 421, and the second surface 4312 and the third surface 4313 are respectively attached to the two sides of the groove 441. When the battery expands, it will exert an outward force on the first end plate and the second end plate, for example, as... Figure 6 As shown, the battery cell assembly generates an outward force F1 on the first end plate 411. Since the contact surface between the protrusion 431 and the groove 441 intersects the direction of F1, the included angle formed by the two is... Compared to the first angle satisfy Furthermore, the sidewall of the groove 441 will provide a resistance force F2 perpendicular to the contact surface to the protrusion 431. The component force F4 obtained by decomposing F2 along the X direction satisfies: And the component force F3 along the Y direction satisfies: .when When the angle is 90°, the resistance force F2 required for the expansion force F1 of the equilibrium module is minimized. This can be determined using the cosine function. As the expansion force F1 of the balancing module increases, the resistance force F2 required to counteract it also increases. At this time, the contact surface between the groove 441 and the protrusion 431 can provide a suitable resistance force F2, and also facilitate the assembly of the protrusion 431 and the groove 441. It can be understood that the force situation of the protrusion 431 and the groove 441 on the second end plate 412 at the other end is similar to the force situation of the protrusion on the first end plate 411 mentioned above. Therefore, the second angle formed by the first surface 4311 and the third surface 4313 of the protrusion 421 is... The range of values ​​is .

[0093] In some embodiments, the first angle With the second angle equal.

[0094] When the first angle Equal to the second angle At this time, the protrusion 431 and the groove 441 are in the shape of an isosceles trapezoid. The symmetrical structure facilitates positioning and splicing, and also helps the end plates at both ends of the battery box to bear the force evenly, so as to achieve more solid support.

[0095] In some embodiments, such as Figure 5 As shown, along the direction perpendicular to the base surface S1, the maximum height of protrusion 431 is Along the direction parallel to the base surface S1, the maximum width of protrusion 431 is ,and, .

[0096] The side of protrusion 431 along its height direction will be compressed by the expansion of the battery cell assembly. The force generated by the expansion of the battery cell assembly will produce a bending moment around the root of the protrusion, limiting the maximum height of the protrusion to [value missing]. Less than or equal to the maximum width of the protrusion This can prevent excessive bending moment from damaging the protruding root structure.

[0097] In some embodiments, the maximum height of the protrusion 431 is With the maximum width satisfy: .

[0098] The maximum height of protrusion 431 is If the area is too small, the contact area between the protrusion 431 and the groove 441 will be small. Under the same shear force, the smaller the area, the greater the stress on the contact surface, and the more prone to stress concentration. The maximum height of the protrusion 431 is... Too large a height would increase bending stress at the root, which is detrimental to structural safety. The maximum height should be... With the maximum width Set to meet This allows the protruding structure to have a better stress distribution, which is beneficial to improving the reliability of the connection structure.

[0099] In some embodiments, such as Figure 5 As shown, along the direction perpendicular to the base surface S2, the maximum depth of the groove 441 is The thickness of the side plate where groove 441 is located is ,and, .

[0100] like Figure 5 As shown, the first positioning part 430 includes a protrusion 431, and the second positioning part 440 includes a groove 441. The groove 441 is located on the first side plate 421 and has a thickness of [missing information]. This refers to the thickness of the first side plate 421. Similarly, the groove 441 can also be located on the second side plate 422, corresponding to the thickness... This refers to the thickness of the second side plate 422. The thickness of the first side plate 421 and the second side plate 422 can be the same or different. Correspondingly, the maximum depth of the groove 441 on the first side plate 421 and the maximum depth of the groove on the second side plate 422 can be the same or different.

[0101] Depth of the groove If the groove is too small, the joint between the groove and the protrusion will not be firm, and the groove depth will be insufficient. Excessive thickness of the side plate at the groove significantly weakens its structural strength, making it prone to breakage. Therefore, the maximum depth of the groove should be selected. The range allows for a secure and stable connection between the grooves and protrusions while ensuring the structural strength of the side panels themselves.

[0102] In some embodiments, the maximum depth of the groove 441 With the thickness of the side plate It can also satisfy .

[0103] Through in-depth research, the applicant discovered that the maximum depth of groove 441... This reflects the contact area and maximum depth between the end plate and the side plate. The larger the groove, the larger the contact area, which is more conducive to the transmission of force between the end plate and the side plate, enhancing the load-bearing capacity of the box structure. Furthermore, considering the strength requirements of the side plate itself, the maximum depth of groove 441 is [increased / decreased]. Thickness of the first side plate 421 Set to meet ,For example It can be equal to This way, the depth of the groove is exactly half the thickness of the side plate, which can better balance the structural strength of the side plate and the reliability of the box connection.

[0104] like Figure 5 As shown, in some embodiments, the first housing plate 410 is provided with a first connecting hole 432, and the second housing plate 420 is provided with a second connecting hole 442. The first connecting hole 432 and the second connecting hole 442 are used for connection by fasteners.

[0105] Reference Figure 5 The second connecting hole 442 provided on the first side plate 421 in the second housing plate 420 can penetrate through the thickness of the first side plate 421, and the first connecting hole 432 provided on the first end plate 411 can be a blind hole. In some embodiments, the fastener can be a screw or a bolt.

[0106] By using fasteners in conjunction with the first and second positioning parts, it is not only beneficial for the docking and connection between the various plates of the battery box, but also for distributing the force generated by the expansion of the battery cells. This makes the connection between the first box plate 410 and the second box plate 420 more secure and tighter, improving the load-bearing capacity of the assembled battery box and making the overall structure more balanced and reasonable in terms of stress.

[0107] In some embodiments, the first connecting hole 432 is offset from the first positioning part 430, and the second connecting hole 442 is offset from the second positioning part 440.

[0108] The first connecting hole 432 is staggered from the first positioning part 430, and the second connecting hole 442 is staggered from the second positioning part 440, so that the fastener connection and the positioning splicing between the box plate do not affect each other, and the structural strength of the parts where the first positioning part 430 and the second positioning part 440 are located is avoided due to the opening of the connecting hole.

[0109] The staggered arrangement can avoid mutual interference. In particular, when subjected to shear force, the first positioning part and the second positioning part can reduce the shear force on the fastener, improve the strength of the box structure and the reliability of the connection.

[0110] In some embodiments, the first positioning part 430 includes a plurality of spaced protrusions 431, and the first connecting hole 432 is located between two adjacent protrusions 431; the second positioning part 440 includes a plurality of spaced grooves 421, and the second connecting hole 442 is located between two adjacent grooves 421.

[0111] The design incorporates multiple protrusions and grooves, resulting in more precise positioning of the first and second housing plates and increasing the connection strength between the first positioning part 430 and the second positioning part 440. The holes are positioned between adjacent protrusions and / or grooves, staggered from the positioning parts to avoid mutual interference. Furthermore, the shear force provided by the fasteners and the resistance between the protrusions and grooves work together to resist the module's expansion force, resulting in a more balanced and reasonable overall structural stress distribution.

[0112] According to an embodiment of the second aspect of this application, a battery 300 is provided. Figure 7 This is a schematic diagram of the battery structure provided for some embodiments of this application. Figure 8 Exploded views of the battery structure provided in some embodiments of this application, such as Figures 7-8 As shown, the battery 300 includes a battery housing 400 and a cell assembly 500 housed within the battery housing 400.

[0113] The battery housing 400 can be the battery housing described above. The first housing plate 410 and the second housing plate 420 of the battery housing are positioned by docking through the first positioning part and the second positioning part, thereby improving the accuracy of housing docking and positioning in the assembly process.

[0114] In some embodiments, the battery 300 further includes a cushioning pad 600 located between the first housing plate 410 and the cell assembly 500.

[0115] In some examples, the cushioning pad can be arranged along the stacking direction of the cells in the cell assembly, for example, as... Figure 8 As shown, the buffer pad 600 includes a first buffer pad 610 and a second buffer pad 620. The first buffer pad 610 is arranged between the first end plate 411 and the cell assembly 500 along the first direction X, and / or the second buffer pad 620 is arranged between the second end plate 412 and the cell assembly 500.

[0116] The buffer pad is compressible and has resilience. The buffer pad 600 is set between the first housing plate 410 and the cell assembly 500. It can fill the gap between the first housing plate and the cell assembly, which helps to maintain the positioning of the cell assembly or battery cell in the battery box. At the same time, it can provide sufficient positioning adjustment margin between the first housing plate and the second housing plate of the battery box, which facilitates subsequent docking and positioning.

[0117] According to an embodiment of the third aspect of this application, a method for preparing a battery is provided. Figure 9 A flowchart illustrating a method for preparing a battery, as provided in some embodiments of this application, is shown below. Figure 8 and Figure 9 As shown, the battery manufacturing method includes:

[0118] Step S810: Arrange the cell assembly 500 between the first housing plate 410 and the second housing plate 420.

[0119] The first housing plate 410 and the second housing plate 420 together can form an accommodating space. The battery cell assembly 500 is arranged between the first housing plate 410 and the second housing plate 420 so that the battery cell assembly 500 can be located in the accommodating space after the first housing plate 410 and the second housing plate 420 are enclosed.

[0120] Step S820: Connect the second positioning part 440 on the second housing plate 420 with the first positioning part 430 on the first housing plate 410 to achieve docking and positioning of the first housing plate 410 and the second housing plate 420.

[0121] The first housing plate 410 and the second housing plate 420 are docked and positioned by the positioning cooperation between the first positioning part 430 and the second positioning part 440.

[0122] Step S830: Fix the first housing plate 410 and the second housing plate 420 together.

[0123] After docking and positioning are completed, the first housing plate 410 and the second housing plate 420 are fixedly connected by connecting components, thus completing the module installation of the cell assembly and the battery housing in the battery module process. The connecting components that achieve the fixed connection can be fastener connections, or other forms of connection structures or connection methods, such as riveting, welding, or bolting.

[0124] By setting up a first positioning part and a second positioning part to achieve docking positioning, the reliance on visual inspection equipment can be reduced, providing better docking accuracy for subsequent fixed connection and avoiding the need for cumbersome inspection equipment that would increase assembly costs.

[0125] In some embodiments, the first housing plate 410 includes a first end plate 411 and a second end plate 412 disposed opposite to each other along a first direction X, and at least one of the first end plate 411 and the second end plate 412 is provided with a first positioning portion 430; the second housing plate 420 includes a first side plate 421 and a second side plate 422 disposed opposite to each other along a second direction Y, and at least one of the first side plate 421 and the second side plate 422 is provided with a second positioning portion 440.

[0126] Step S810 also includes:

[0127] (i) Provide a 600mm cushioning pad;

[0128] (ii) Arrange the buffer pad 600 between the cell assembly 500 and the first end plate 411, and / or between the cell assembly 500 and the second end plate 412.

[0129] The buffer pad provides a certain adjustment range between the first end plate and the second end plate, thereby providing adjustment space and adaptability for the docking and positioning of the first box plate and the second box plate.

[0130] In some embodiments, the buffer plate 600 includes a first buffer plate 610 and a second buffer plate 620, and wherein step S810 includes:

[0131] (i) Fix the first end plate 411, and arrange the first end plate 411, the first buffer plate 610, the cell assembly 500, the second buffer plate 620 and the second end plate 412 in sequence along the first direction X;

[0132] (ii) Apply pressure to the outer side of the second end plate 412 away from the first end plate 411 so that the distance between the first end plate 411 and the second end plate 412 is compressed to a preset distance.

[0133] The distance between the first end plate 411 and the second end plate 412 can be the distance between their outermost edges along the first direction X, or it can be the distance between their center points along the first direction X. The specific distance can be selected according to the structural design requirements, and this embodiment does not impose any restrictions on it. Here, the distance between the first end plate 411 and the second end plate 412 represents the length of the battery along the first direction X.

[0134] The elasticity of the buffer pad provides sufficient adjustment space between the first end plate 411 and the second end plate 412. The distance between them can be adjusted by applying pressure so that they correspond to the positions of the second positioning parts on the first and second side plates of the second housing plate for docking and positioning. At the same time, applying pressure to the two end plates also helps to increase the holding force of the cell assembly and ensure the stability of the battery structure arrangement.

[0135] In some embodiments, step S820 includes:

[0136] (i) Align and engage the second positioning part 440 on the second housing plate 420 with the first positioning part 430 on the first housing plate 410;

[0137] (ii) Apply a preset pressure to the side surface of the second housing plate 420 facing away from the first housing plate 410 to complete the docking and positioning.

[0138] The first positioning part and the second positioning part have mutually cooperating contact surfaces. By applying a certain pressure, the two mutually cooperating contact surfaces can provide a guiding effect, so that the misalignment deviation of the first positioning part and the second positioning part during docking can be further adjusted to a more accurate alignment position under the action of external pressure by the cooperation of the contact surfaces, thus completing a precise positioning and facilitating subsequent fastening connection.

[0139] In some embodiments, step S830 includes: fixing the first housing plate 410 and the second housing plate 420 together with fasteners 700.

[0140] like Figure 8 As shown, the fastener 700 can be a bolt. By drilling connecting holes on the first housing plate 410 and the second housing plate 420 respectively, when the first positioning part 430 on the first housing plate 410 and the second positioning part on the second housing plate 420 are aligned and positioned by applying pressure, the connecting holes on the first housing plate 410 and the second housing plate 420 are also aligned and positioned. Therefore, the fastening connection can be completed directly by the fastener without further adjustment, which improves the efficiency of battery assembly.

[0141] Those skilled in the art will understand that, in the methods described in the specific embodiments, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0142] According to an embodiment of the fourth aspect of this application, an electrical device is provided, including the battery in the above embodiments or the battery prepared by the above preparation method, the battery being used to provide electrical energy.

[0143] In some examples, such as Figures 1-8 As shown, the battery 300 can be arranged in a battery housing 400 by assembling a cell assembly 500 composed of multiple battery cells connected in series and / or in parallel. The battery housing 400 includes a first housing plate 410 and a second housing plate 420. The first housing plate 410 includes a first end plate 411 and a second end plate 412 spaced apart along a first direction X. The second housing plate 420 includes a first side plate 421 and a second side plate 422 spaced apart along a second direction Y. The two ends of the first end plate 411 and the two ends of the second end plate 412 are respectively provided with a first positioning part 430, and the two ends of the first side plate 421 and the two ends of the second side plate 422 are respectively provided with a second positioning part 440. The first end plate 411, the first side plate 421, the second end plate 412 and the second side plate 422 are connected end to end to form a housing space for accommodating the cell assembly.

[0144] The specific assembly steps of the battery housing 400 and the cell assembly 500 may include the following steps:

[0145] First, the first end plate 411 is fixed by a tooling fixture to serve as a fixed end. Then, the first buffer pad 610, the battery cell assembly, the second buffer pad 620, and the second end plate 412 are stacked sequentially on one side of the first end plate 411 along the first direction X. Each time a component is stacked, an initial positioning can be performed.

[0146] Secondly, pressure is applied to the side surface of the second end plate 412 away from the first end plate 411 in the direction facing the first end plate 411. In the case of a single row of cells in the cell assembly, the maximum peak pressure applied to the second end plate 412 can reach 7000N. The compression of the buffer pad makes the length of the module along the first direction X reach the target size.

[0147] Next, the second positioning portion 440 at the ends of the first side plate 421 and the second side plate 422 is initially positioned with the first positioning portion 430 on the first end plate 411 and the second end plate 412, for example, by engaging the protrusion 431 with the groove 441. A tooling pressure mechanism is used to apply pressure to the first side plate 421 and the second side plate 422 facing the cell assembly, and further engagement and positioning are achieved by guiding the contact surfaces between the protrusion 431 and the groove 441. During the docking and positioning process, visual inspection equipment can also be used to assist in positioning. For example, a camera can be used to photograph the bolt holes on the first housing plate 410 and the second housing plate 420 to determine the relative positions of the two holes. Based on the relative positions determined by the camera, the robotic arm docks the first side plate 421 and the second side plate 422 with the first end plate 411 and the second end plate 412, and precise positioning is completed after applying pressure.

[0148] Finally, the bolts are automatically fastened using automated devices or manually tightened to complete the assembly.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery housing, characterized in that, include: The first housing plate includes a first positioning part; The second housing plate includes a second positioning part that cooperates with the first positioning part. The first positioning part and the second positioning part are used for docking and positioning the first housing plate and the second housing plate so that the first housing plate and the second housing plate form a receiving space for accommodating the battery cell assembly.

2. The battery housing according to claim 1, wherein, The first housing plate includes a first end plate and a second end plate disposed opposite to each other along a first direction, and at least one of the first end plate and the second end plate is provided with the first positioning part; The second housing panel includes a first side panel and a second side panel disposed opposite to each other along a second direction, wherein at least one of the first side panel and the second side panel is provided with the second positioning part. The first direction is perpendicular to the second direction.

3. The battery housing according to claim 2, wherein, The first end plate includes a first end face and a second end face opposite to each other, and the second end plate includes a third end face and a fourth end face opposite to each other. The first end face and the third end face are respectively connected to the first side plate, and the second end face and the fourth end face are respectively connected to the second side plate. At least one of the first end face and the third end face is provided with the first positioning part, and / or at least one of the second end face and the fourth end face is provided with the first positioning part; The first side plate and / or the second side plate are provided with the second positioning part.

4. The battery housing according to any one of claims 1 to 3, wherein, One of the first positioning portion and the second positioning portion includes at least one protrusion protruding from the base surface, and the other of the first positioning portion and the second positioning portion includes at least one groove recessed into the base surface, wherein the base surface is the surface of the component where the first positioning portion or the second positioning portion is located, and the cross-sectional shape of the groove is adapted to the cross-sectional shape of the protrusion.

5. The battery housing according to claim 4, wherein, The cross-section of the protrusion is triangular, square, rectangular, trapezoidal, or semi-circular; the cross-sectional shape of the groove is the same as that of the protrusion.

6. The battery housing according to claim 4, wherein, Along the direction away from the base surface, the width of the protrusion gradually decreases, while the width of the groove gradually increases.

7. The battery housing according to claim 6, wherein, The protrusion includes a first surface away from the base surface, and a second surface and a third surface respectively connecting the two ends of the first surface to the base surface, wherein the first surface, the second surface and the third surface are all planar.

8. The battery housing according to claim 7, wherein, The first surface is parallel to the base surface, and the first angle formed by the first surface and the second surface is α1, the second angle formed by the first surface and the third surface is α2, and 105°≤α1≤165°, 105°≤α2≤165°.

9. The battery housing according to claim 8, wherein, The first angle is equal to the second angle.

10. The battery housing according to claim 4, wherein, Along the direction perpendicular to the base surface, the maximum height of the protrusion is h1; along the direction parallel to the base surface, the maximum width of the protrusion is b; and 0 <h1≤b。 11. The battery housing according to claim 10, wherein, The maximum height h1 and the maximum width b of the protrusion satisfy the condition: 0.5b≤h1≤0.9b.

12. The battery housing according to claim 3, wherein, The second positioning part includes a groove with a maximum depth of h2 and a thickness of H on the side plate where the groove is located, and 0.25H≤h2≤0.75H.

13. The battery housing according to claim 12, wherein, The maximum depth h2 of the groove and the thickness H of the side plate satisfy 0.4H≤h2≤0.6H.

14. The battery housing according to any one of claims 1 to 3, wherein, The first housing plate is provided with a first connecting hole, and the second housing plate is provided with a second connecting hole. The first connecting hole and the second connecting hole are used for connection by fasteners.

15. The battery housing according to claim 14, wherein, The first connecting hole is offset from the first positioning part, and the second connecting hole is offset from the second positioning part.

16. The battery housing according to claim 15, wherein, The first positioning part includes a plurality of spaced protrusions, and the first connecting hole is located between two adjacent protrusions; the second positioning part includes a plurality of spaced grooves, and the second connecting hole is located between two adjacent grooves.

17. A battery, characterized in that, It includes a battery housing as described in any one of claims 1-16, and a cell assembly housed within the battery housing.

18. The battery according to claim 17, characterized in that, Also includes: A buffer pad; the buffer pad is located between the first housing plate and the battery cell assembly.

19. An electrical appliance, characterized in that, The electrical device includes a battery as described in claim 17 or 18, the battery being used to provide electrical energy.

Images