Battery box body, battery device and power utilization device

Abstract

The utility model discloses a battery box body, a battery device and a power utilization device. The battery box body provided by the utility model is provided with an accommodating cavity for accommodating a battery monomer, the battery box body comprises a stamping basin body, the stamping basin body is limited to form a part of the accommodating cavity, the stamping basin body is provided with a separation area, and the separation area extends from a first side of the stamping basin body to a second side opposite to the first side; the partition area is used for dividing the stamping basin body into two separated sub-basin bodies in the extending direction of the partition area. Therefore, the battery box body forms part of the accommodating cavity through the stamping basin body so as to provide support and protection for the battery monomers, and meanwhile, the stamping basin body can be divided into the two separated sub-basin bodies through the separation region, so that the size of the battery box body can be adaptively changed, the flexibility of the battery box body is improved, and the application scene of the battery box body is widened; the production cost is saved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle life, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] During use, the battery case can provide support and protection for components such as battery cells. However, the specifications and dimensions of the battery case are relatively fixed and difficult to adjust flexibly. For example, the battery case is often formed by stamping, and different molds need to be developed to produce battery cases of different sizes, resulting in high production costs and poor flexibility. Utility Model Content

[0004] The main purpose of this application is to provide a battery box, a battery device and an electrical device, aiming to solve the technical problems of poor flexibility and adaptability of battery boxes in the prior art.

[0005] To solve the above problems, the present application provides a battery case, which is provided with a receiving cavity for accommodating a battery cell. The battery case includes a stamped basin, which defines a portion of the receiving cavity. The stamped basin is provided with a partition area, which extends from a first side of the stamped basin to a second side opposite to the first side. The partition area is used to divide the stamped basin into two separate sub-basins along the extension direction of the partition area. Thus, the battery case forms a partial receiving cavity through the stamped basin, thereby providing support and protection for the battery cell. At the same time, the stamped basin can be divided into two separate sub-basins by the partition area, thereby being able to adaptively change the size of the battery case, improve the flexibility of the battery case, and thus broaden the application scenarios of the battery case and save production costs.

[0006] In some embodiments, the partition area is recessed toward the surface of the accommodating cavity. Thus, by recessing the partition area toward the surface of the accommodating cavity, the difficulty of dividing the stamped basin into two separate sub-basins along the partition area is reduced, thereby improving production efficiency.

[0007] In some embodiments, the width of the partition area along a direction perpendicular to the extension direction is greater than or equal to 30 mm and less than or equal to 100 mm. Thus, by setting the width of the partition area to be greater than or equal to 30 mm and less than or equal to 100 mm, the partition area can be better divided, thereby reducing the difficulty of dividing the stamped basin into two separate sub-basins along the partition area and alleviating the risk of the two separated sub-basins being too small due to an excessively large width of the partition area.

[0008] In some embodiments, the partition region is provided with at least two glue storage slots, each extending along the extension direction, and the at least two glue storage slots are spaced apart in a width direction perpendicular to the extension direction. Thus, by providing the glue storage slots in the partition region, it is facilitated to apply a colloid such as a sealant within the glue storage slots along the extension direction. The spacing of the glue storage slots along the width direction perpendicular to the extension direction facilitates uniform application of the colloid. Furthermore, the spacing of the at least two glue storage slots along the width direction mitigates the risk of the glue storage slots interfering with the segmentation of the punched basin, thereby improving the reliability of the battery case.

[0009] In some embodiments, the depth of the glue storage tank is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. Therefore, by properly setting the depth of the glue storage tank, the glue storage tank can better accommodate the colloid, improve the sealing effect of the colloid, and at the same time reduce the risk of the surface flatness of the stamping basin facing the accommodating cavity being low due to the excessive depth of the glue storage tank.

[0010] In some embodiments, the stamped basin is divided into two separate sub-basins along an extension direction by a partition region, and the battery case further includes an extension member extending along the extension direction and fixedly connected to the two sub-basins in a width direction perpendicular to the extension direction. Thus, by fixing the extension member to the two sub-basins in the width direction, the extension member can increase the width dimension of the battery case, thereby further improving the applicability and flexibility of the battery case and broadening its application scenarios.

[0011] In some embodiments, the partition area is recessed on the surface facing the accommodating cavity, the width of the extension piece is larger than the width of the partition area, each sub-basin includes a portion of the partition area, and the extension piece is connected to the recessed portions of the two sub-basins in the width direction. Thus, by connecting the extension piece to the recessed portions of the two sub-basins in the width direction, the difficulty of connecting the extension piece to the two sub-basins can be reduced, while the flatness between the extension piece and the flat areas of the sub-basins can be improved, alleviating the risk of a steep transition between the extension piece and the sub-basins, which could lead to reduced stability in battery cell installation, thereby improving the reliability of the battery case.

[0012] In some embodiments, the thickness of the extension member is less than or equal to the depth of the recess in the partition area. Thus, by making the thickness of the extension member less than or equal to the depth of the recess in the partition area, the flatness between the extension member and the sub-basin can be further improved, and the consistency between the surface of the extension member facing the accommodating cavity and the surface of the sub-basin facing the accommodating cavity can be improved, reducing the risk of the extension member protruding from the sub-basin and interfering with the battery cells, thereby improving the reliability of the battery case.

[0013] In some embodiments, a portion of each sub-basin is provided with a glue storage tank extending along the extension direction, and the extension member covers the glue storage tank. Thus, the extension member covers the glue storage tank, allowing the extension member to fully contact the glue in the glue storage tank, thereby facilitating adhesion and sealing between the sub-basin and the extension member, thereby improving the reliability of the battery case.

[0014] In some embodiments, the width dimension between the glue reservoir and the end of the extension is greater than or equal to 3 mm and less than or equal to 6 mm. Thus, by properly arranging the width dimensions of the glue reservoir and the end of the extension, the contact area between the glue in the glue reservoir and the extension is increased, thereby improving the bonding and sealing effect between the sub-basin and the extension.

[0015] In some embodiments, the partial region and the extension member are welded together, and the welding path between the partial region and the extension member is located between the glue storage tank of the partial region and the end of the partial region near the other sub-basin. Thus, by arranging the welding path between the partial region and the extension member between the glue storage tank and the end of the partial region near the other sub-basin, the difficulty of welding between the partial region and the extension member is reduced, thereby improving the structural strength and connection stability of the extension member and the partial region. At the same time, the risk of the welding path interfering with the glue storage tank, which may cause the glue in the glue storage tank to leak, is reduced, and the sealing effect between the sub-basin and the extension member is improved.

[0016] In some embodiments, the extension member has a width dimension greater than or equal to 100 mm and less than or equal to 200 mm. Thus, by properly setting the width dimension of the extension member, when the extension member is fixedly connected to the two sub-basins, the width dimension of the battery case can be more reasonably adapted, thereby improving the adaptability of the battery case and saving production costs.

[0017] To address the above-mentioned issues, the present application further provides a battery device comprising a battery cell assembly and the aforementioned battery case, wherein the battery cell assembly is disposed within the accommodating cavity. Thus, the battery case accommodates the battery cell assembly, thereby facilitating the battery case to provide support and protection for the battery cell assembly, thereby improving the reliability of the battery device.

[0018] In order to solve the above problems, the present application also provides an electrical device, which includes the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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.

[0020] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application;

[0021] Figure 2 is a schematic diagram of the exploded structure of a battery device according to one or more embodiments of the present application;

[0022] Figure 3 is a first structural schematic diagram of a battery box according to one or more embodiments of the present application;

[0023] Figure 4 is based on Figure 3 A partial enlarged schematic diagram of area A of the battery box shown;

[0024] Figure 5 is a schematic diagram of the exploded structure of a battery box according to one or more embodiments of the present application;

[0025] Figure 6 is a second structural schematic diagram of a battery box according to one or more embodiments of the present application;

[0026] Figure 7 is based on Figure 6 The first cross-sectional view of the battery box along the BB direction is shown;

[0027] Figure 8 is based on Figure 6 The second cross-sectional view of the battery box along the BB direction is shown;

[0028] Figure 9 is based on Figure 8 A partial enlarged schematic diagram of area C of the battery case is shown.

[0029] Figure numbers: vehicle 1; battery device 2; controller 3; motor 4; battery cell 10; battery case 20; first part 210; second part 220; accommodating chamber 21; stamping basin 22; partition area 221; partial area 2211; glue storage tank 2212; first side 222; second side 223; sub-basin 224; extension piece 23; welding track 24; glue 25; extension direction x1; width direction x2. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0033] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0035] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0038] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0039] The battery case can provide support and protection for the internal components during use. However, the specifications and dimensions of the battery case are relatively fixed and difficult to adjust flexibly. For example, the battery case is often formed by stamping, and different molds need to be developed to produce battery cases of different sizes, resulting in higher production costs and poor flexibility.

[0040] To address the technical problems existing in the related art, a battery case, a battery device, and an electrical device are provided. The battery case accommodates battery cells through a receiving cavity, a portion of which is defined by a stamped basin. The stamped basin can be divided into two separate sub-basins by a partition area, thereby enabling the size of the battery case to be adaptively changed, thereby improving the flexibility and applicability of the battery case.

[0041] Batteries mentioned in this field can be categorized as either primary batteries or rechargeable batteries, depending on whether they are rechargeable. Primary batteries are also called "disposable" batteries or primary batteries because once they are depleted, they cannot be recharged and must be discarded. Rechargeable batteries are also called secondary batteries, secondary batteries, or storage batteries. Rechargeable batteries are manufactured using different materials and processes than primary batteries. Their advantage is that they can be reused multiple times after charging, and their output current capacity is higher than that of most primary batteries. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries offer advantages such as light weight, high capacity (1.5 to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect, and a very low self-discharge rate. Consequently, despite their relatively high price, they are widely used. Lithium-ion batteries are also widely used in pure electric vehicles and hybrid vehicles. While the capacity of lithium-ion batteries used for these applications is relatively low, they offer high output, high charging current, and a long service life, albeit at a higher cost.

[0042] The batteries described in the embodiments of this application are either rechargeable batteries or disposable batteries. The embodiments disclosed herein will be described primarily using lithium-ion batteries as an example. It should be understood that the embodiments disclosed herein are applicable to any other suitable type of rechargeable battery. The batteries described in the embodiments disclosed herein can be directly or indirectly used in appropriate devices to power such devices.

[0043] The present application provides an electrical device, which may include but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, and the like. The electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, space shuttles, and spacecraft. The electrical device may include a battery device, which may provide electrical energy to the device to achieve corresponding functions.

[0044] Taking the electrical device as an electric vehicle as an example, the electric vehicle may include a battery device.

[0045] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application.

[0046] Vehicle 1 can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Vehicle 1 is internally provided with a battery assembly 2, which can be located at the bottom, front, or rear of vehicle 1. Battery assembly 2 can be used to power vehicle 1, for example, as an operating power source for vehicle 1. Vehicle 1 also includes a controller 3 and a motor 4. Controller 3 controls battery assembly 2 to power motor 4, for example, to meet the power requirements of vehicle 1 for starting, navigation, and driving.

[0047] In some embodiments of the present application, the battery device 2 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0048] In order to improve the performance of the electrical device, the present application also provides a battery device, see Figure 2 , Figure 2 is a schematic diagram of the exploded structure of a battery device according to one or more embodiments of the present application.

[0049] The shape of the battery device 2 may include but is not limited to a square, cylindrical, or other arbitrary shapes.

[0050] The battery device 2 may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include one or more battery cells 10 .

[0051] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 10 ; as an example, the battery cell assembly may include a battery module, which is formed by arranging and fixing a plurality of battery cells 10 to form an independent module.

[0052] In a battery cell assembly, there may be multiple battery cells 10, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections among the multiple battery cells 10. Multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire assembly of multiple battery cells 10 is housed within a battery case 20. Alternatively, the battery assembly 2 may comprise multiple battery cells 10 first connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single assembly, and then housed within the battery case 20. The battery assembly 2 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 10.

[0053] In some embodiments, the battery device 2 may include a battery case 20 and a battery cell 10, and the battery cell 10 may be accommodated in the battery case 20. For example, the battery case 20 is formed with a receiving cavity 21 for providing a receiving space for the battery cell 10. The battery case 20 may adopt various structures. In some embodiments, such as Figure 2 As shown, the battery case 20 may include a first portion 210 and a second portion 220. The first portion 210 and the second portion 220 overlap each other, and the first portion 210 and the second portion 220 jointly define a receiving cavity 21 for accommodating the battery cell 10. The second portion 220 may be a hollow structure with one end open, and the first portion 210 may be a plate-like structure. The first portion 210 overlaps the open side of the second portion 220, so that the first portion 210 and the second portion 220 jointly define the receiving cavity 21. The first portion 210 and the second portion 220 may also be hollow structures each with one end open, with the open side of the first portion 210 overlapping the open side of the second portion 220.

[0054] The battery cell 10 can be manufactured in two ways: laminated and wound. Laminated batteries have a uniform current collection effect, low internal resistance, and high specific power. However, in order to improve precision, they require extremely high mold precision, high equipment investment, and a relatively complex process, resulting in low production efficiency. Wound batteries are simple to manufacture, with average equipment precision requirements for the production and assembly processes, high production efficiency, and low cost. In terms of performance, wound batteries have excellent high and low temperature performance, charge very quickly, have an ultra-long life, stable high output voltage, a sturdy structure, and strong shock resistance.

[0055] The battery cell 10 refers to the smallest unit that makes up the battery device. The battery cell 10 may include a casing, an electrode assembly, and other functional components. The casing may form the internal environment of the battery cell 10 and isolate the internal environment of the battery cell 10 from the external environment. It is understandable that the casing may provide support and protection for the components in the internal environment of the battery cell 10. The electrode assembly is the component in the battery cell 10 where the electrochemical reaction occurs. One or more electrode assemblies may be contained in the casing. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and an isolating member is usually provided between the positive electrode sheet and the negative electrode sheet.

[0056] Combine Figure 2 and Figure 3 , Figure 3 This is a first structural schematic diagram of a battery box according to one or more embodiments of the present application.

[0057] The battery case 20 is provided with a accommodating cavity 21 for accommodating the battery cell 10. The battery case 20 includes a stamped basin 22, which defines a portion of the accommodating cavity 21. The stamped basin 22 is provided with a separation area 221, which extends from a first side 222 of the stamped basin 22 to a second side 223 opposite to the first side 222. The separation area 221 is used to divide the stamped basin 22 into two separate sub-basins 224 along the extension direction x1 of the separation area 221.

[0058] It is understood that the battery case 20 can accommodate the battery cell 10 through the accommodating cavity 21, thereby providing support and protection for the battery cell 10. The stamped basin 22 can be formed by stamping. The stamped basin 22 serves as a part of the battery case 20 and defines a portion of the accommodating cavity 21. For example, the stamped basin 22 can be a hollow structure with one side open. Specifically, the stamped basin 22 can be any shape, including but not limited to square, circular, and so on.

[0059] The stamped basin body 22 is provided with a partition area 221, which extends from a first side 222 of the stamped basin body 22 to a second side 223 opposite the first side 222. For example, the first side 222 may correspond to a side boundary of the stamped basin body 22, and the second side 223 may correspond to the other side boundary of the stamped basin body 22 opposite the first side 222. Specifically, taking the shape of the stamped basin body 22 as an example, the stamped basin body 22 may have four sides opposite to each other, the first side 222 may correspond to any one of the four sides, and the second side 223 may be the other side opposite the first side 222. It should be noted that the extension direction x1 of the separation area 221 can be parallel to the direction from the first side 222 to the second side 223, or it can be at a certain angle to the direction from the first side 222 to the second side 223. For example, taking the shape of the stamping basin 22 as a roughly square, the extension direction x1 of the separation area 221 can be perpendicular to the boundary of the stamping basin 22 close to the first side 222 and the boundary of the stamping basin 22 close to the second side 223, or it can be oblique to the boundary close to the first side 222 and the boundary close to the second side 223. Specifically, in the direction from the first side 222 to the second side 223, one end of the separation area 221 is located on the boundary of the stamping basin 22 close to the first side 222, and the other end is located on the boundary of the stamping basin 22 close to the second side 223.

[0060] The separation area 221 can be used to divide the stamped basin body 22 into two separate sub-basins 224 along the extension direction x1 of the separation area 221. It is understandable that in the undivided state, the stamped basin body 22 can be used as a whole and perform the corresponding functions. In the state of being divided into two separate sub-basins 224, the two sub-basins 224 can be used independently and perform the corresponding functions. For example, when the stamped basin body 22 needs to be divided, the stamped basin body 22 can be cut along the separation area 221 by a cutting device, so that the stamped basin body 22 is divided into two separate sub-basins 224. It is understandable that the specific shape of the separation area 221 can be set according to actual needs. Optionally, the separation area 221 can extend roughly in a straight line. In some application scenarios, the separation area 221 can also extend in an arc, etc. Specifically, taking the case where the separation area 221 extends roughly in a straight line and the shape of the stamped basin body 22 is roughly square, when the extension direction x1 of the separation area 221 is perpendicular to the boundary of the first side 222 and the boundary of the second side 223 of the stamped basin body 22, the two sub-basin bodies 224 after division are also roughly square; when the extension direction x1 of the separation area 221 is obliquely intersected with the boundary of the stamped basin body 22 close to the first side 222 and the boundary close to the second side 223, the two sub-basin bodies 224 after division can be roughly trapezoidal or triangular, wherein the two sub-basin bodies 224 can both be trapezoidal or triangular, or one of them can be a trapezoid and the other can be a triangle.

[0061] Through the above embodiment, the battery case 20 forms a partial accommodating cavity 21 by stamping the basin 22, thereby providing support and protection for the battery cell 10. At the same time, the stamped basin 22 can be divided into two separate sub-basins 224 through the separation area 221, so that the size of the battery case 20 can be adaptively changed, the flexibility of the battery case 20 can be improved, and the application scenarios of the battery case 20 can be broadened, saving production costs.

[0062] In some embodiments, the stamped basin 22 can serve as the second portion 220 of the battery case 20. The first portion 210 covers the open side of the stamped basin 22. The battery case 20 further includes a sealing strip disposed between opposing surfaces of the stamped basin 22 and the first portion 210, thereby improving the sealing effect between the stamped basin 22 and the first portion 210. Specifically, the sealing strip can be disposed in the separation area 221 of the stamped basin 22, thereby mitigating the risk of sealing failure between the separation area 221 and the first portion 210.

[0063] Please combine Figure 3-Figure 4 , Figure 4 is based on Figure 3 FIG. 1 is a partial enlarged schematic diagram of area A of the battery case 20 shown.

[0064] In some embodiments, the surface of the separation area 221 facing the accommodating cavity 21 is recessed. Exemplarily, the stamping basin 22 also includes other areas connected to the separation area 221. The surface of the separation area 221 facing the accommodating cavity 21 may be recessed toward the side away from the accommodating cavity 21 compared to the surfaces of the other areas facing the accommodating cavity 21. It can be understood that, by recessing the surface of the separation area 221 facing the accommodating cavity 21, it is easier to cut the stamping basin 22 along the extension direction x1 of the separation area 221, compared to not recessing the separation area, thereby reducing the difficulty of cutting. In some application scenarios, when the stamping basin 22 is not split and is used as a whole, the recess of the separation area 221 can be filled with a colloid 25. The colloid 25 may include but is not limited to structural adhesive, etc., so as to improve the flatness of the side of the stamping basin 22 facing the accommodating cavity 21. Optionally, the recess of the separation area 221 can be filled with the colloid 25. Therefore, by setting the separation area 221 to be concave toward the surface of the accommodating cavity 21, the difficulty of dividing the stamped basin body 22 into two separate sub-basins 224 along the separation area 221 is reduced, thereby improving production efficiency.

[0065] In some embodiments, the dimension D1 of the separation region 221 along the width direction x2 perpendicular to the extension direction x1 is greater than or equal to 30 mm and less than or equal to 100 mm. The dimension D1 of the separation region 221 along the width direction x2 can be greater than or equal to 30 mm and less than or equal to 50 mm, or greater than or equal to 50 mm and less than or equal to 80 mm, or greater than or equal to 70 mm and less than or equal to 100 mm, etc. Specifically, the dimension D1 of the separation region 221 along the width direction x2 can be 30 mm, 40 mm, 50 mm, 55 mm, 60 mm, 70 mm, 80 mm, or 100 mm. Thus, by setting the width dimension D1 of the separation region 221 to be greater than or equal to 30 mm and less than or equal to 100 mm, the separation region 221 can be better divided, thereby reducing the difficulty of dividing the stamped basin 22 into two separate sub-basins 224 along the separation region 221 and alleviating the risk of the two separated sub-basins 224 being too small due to the excessive width dimension D1 of the separation region 221.

[0066] In some embodiments, the partition region 221 is provided with at least two glue storage tanks 2212, each extending along the extension direction x1. The at least two glue storage tanks 2212 are spaced apart along the width direction x2, which is perpendicular to the extension direction x1. The glue storage tanks 2212 can be used to store a colloid 25, which may include, but is not limited to, structural adhesives. The colloid 25 provides reinforcement and sealing for the partition region 221, thereby improving the structural strength and sealing effect of the partition region 221. It will be appreciated that the glue storage tanks 2212 extending along the extension direction x1 facilitate the application of the colloid 25 along the extension direction x1 under the guidance of the glue storage tanks 2212, thereby improving the consistency of the applied colloid 25 and facilitating automated glue application. Compared to manual direct application of the colloid 25, the risk of glue path deviation and local glue shortage is reduced. The number of glue storage tanks 2212 can be two, three, four, or more. At least two glue storage slots 2212 are spaced apart along a width direction x2 perpendicular to the extension direction x1. In some application scenarios, there are two glue storage slots 2212. When the stamping basin 22 is divided, the stamping basin 22 can be divided between the two glue storage slots 2212 to form two separate sub-basins 224. Thus, by providing the glue storage slots 2212 in the separation area 221, it is convenient to apply a colloid 25 such as a sealant within the glue storage slots 2212 along the extension direction x1. The glue storage slots 2212 are spaced apart along a width direction x2 perpendicular to the extension direction x1, which is conducive to improving the consistency of the application of the colloid 25. At the same time, the at least two glue storage slots 2212 are spaced apart along the width direction x2, which can reduce the risk of the glue storage slots 2212 interfering with the division of the stamping basin 22, thereby improving the reliability of the battery case 20.

[0067] In some embodiments, the depth of the glue storage tank 2212 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. The depth of the glue storage tank 2212 may be greater than or equal to 0.5 mm and less than or equal to 1 mm, or greater than or equal to 0.8 mm and less than or equal to 1.5 mm, or greater than or equal to 1 mm and less than or equal to 1.5 mm, and so on. Specifically, the depth of the glue storage tank 2212 may be 0.5 mm, 0.55 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm or 1.5 mm, and so on. It is understandable that the specific depth of the glue storage tank 2212 can be set according to actual sealing requirements. Thus, by reasonably setting the depth of the glue storage tank 2212, it is convenient for the glue storage tank 2212 to better accommodate the colloid 25, improve the sealing effect of the colloid 25, and at the same time alleviate the risk of the surface flatness of the stamping basin 22 facing the accommodating cavity 21 being low due to the excessive depth of the glue storage tank 2212.

[0068] Please combine Figure 5-Figure 6 , Figure 5 is a schematic diagram of the exploded structure of the battery box 20 according to one or more embodiments of the present application; Figure 62 is a second structural diagram of the battery box 20 according to one or more embodiments of the present application.

[0069] In some embodiments, the stamped basin 22 is divided into two separate sub-basins 224 along an extension direction x1 by a partitioning region 221. The battery case 20 further includes an extension member 23 extending along the extension direction x1 and fixedly connected to the two sub-basins 224 in a width direction x2 perpendicular to the extension direction x1. It will be appreciated that when the extension member 23 is fixedly connected to the two sub-basins 224 in the width direction x2, the battery case 20 has a larger dimension in the width direction x2 than when the stamped basin 22 is undivided. The shape of the extension member 23 can correspond to that of the stamped basin 22. For example, taking the stamped basin 22 as a substantially square shape, when the extension direction x1 of the partitioning region 221 is perpendicular to the boundaries of the stamped basin 22 near the first side 222 and the boundaries near the second side 223, the two sub-basins 224 are substantially square in shape. The shape of the extension member 23 can also be substantially square. In some application scenarios, each sub-basin 224 may have a bottom wall and side walls protruding from the bottom wall to define a portion of the accommodating cavity 21. The extension member 23 may also have a bottom wall and side walls protruding from the bottom wall to define a portion of the accommodating cavity 21. The end surface of the extension member 23 facing one of the sub-basins 224 corresponds to and matches the end surface of the sub-basin 224 facing the extension member 23, and the end surface of the extension member 23 facing the other sub-basin 224 corresponds to and matches the end surface of the sub-basin 224 facing the extension member 23. This facilitates the extension member 23 to cooperate with the two sub-basins 224 in the width direction x2 to define the accommodating cavity 21 when the extension member 23 is fixedly connected to the two sub-basins 224 in the width direction x2. Therefore, by fixing the extension member 23 to the two sub-basins 224 in the width direction x2, the extension member 23 can increase the size of the battery case 20 in the width direction x2, thereby further improving the applicability and flexibility of the battery case 20 and broadening the application scenarios of the battery case 20.

[0070] In some embodiments, the partition region 221 is recessed toward the surface of the accommodating cavity 21. The extension member 23 is larger in the width direction x2 than the partition region 221. Each sub-basin 224 includes a partial region 2211 of the partition region 221. The extension member 23 is connected in the width direction x2 to the recessed portions of the partial regions 2211 of the two sub-basins 224. In some application scenarios, when the stamped basin 22 is divided into two separate sub-basins 224 along the extension direction x1 of the partition region 221, the partition region can be divided into at least two portions, one of which is located in one of the sub-basins 224 and the other is located in the other sub-basin 224. It can be understood that since the surface of the separation area 221 facing the accommodating cavity 21 is recessed, the surface of the partial area 2211 of the separation area 221 facing the accommodating cavity 21 is also recessed, and the extension piece 23 is connected to the recess of the partial area 2211, which can facilitate the connection of the extension piece 23 to the sub-basin body 224. At the same time, the extension piece 23 itself has thickness, and the thickness of the extension piece 23 can fill the recess of the partial area 2211 to a certain extent, so that the difference between the surface of the extension piece 23 facing the accommodating cavity 21 and the surface of the sub-basin body 224 facing the accommodating cavity 21 and not recessed is smaller and flatter. Therefore, by connecting the extension piece 23 to the recessed areas 2211 of the two sub-basins 224 in the width direction x2, the difficulty of connecting the extension piece 23 and the two sub-basins 224 can be reduced. At the same time, the flatness between the extension piece 23 and the flat areas of the sub-basins 224 can be improved, thereby alleviating the risk of the transition between the extension piece 23 and the sub-basins 224 being too steep, resulting in a decrease in the installation stability of the battery cell 10, thereby improving the reliability of the battery box 20.

[0071] In some embodiments, the thickness of the extension member 23 is less than or equal to the recessed depth of the partitioning region 221. It is understood that when the thickness of the extension member 23 is less than the recessed depth of the partitioning region 221, the surface of the extension member 23 facing the accommodating cavity 21 is lower than the non-recessed surface of the sub-basin 224 facing the accommodating cavity 21. When the thickness of the extension member 23 is equal to the recessed depth of the partitioning region 221, the surface of the extension member 23 facing the accommodating cavity 21 may be substantially flush with the non-recessed surface of the sub-basin 224 facing the accommodating cavity 21. It should be noted that the recessed depth of the partitioning region 221 can be set according to actual needs. For example, the recessed depth of the partitioning region 221 may be the same as the thickness of the bottom wall of the stamped basin 22, and the thickness of the extension member 23 may be the same as the recessed depth of the partitioning region 221, so that the surface of the extension member 23 facing the accommodating cavity 21 is flush with the non-recessed surface of the sub-basin 224 facing the accommodating cavity 21. In some other embodiments, the recessed depth of the partitioning region 221 may be greater than the thickness of the bottom wall of the stamped basin 22, and the thickness of the extension member 23 may also be greater than the thickness of the bottom wall of the stamped basin 22, thereby improving the structural strength of the extension member 23. The specific recessed depth and thickness of the extension member 23 may be set according to the actual strength requirements of the extension member 23. Thus, by making the thickness of the extension member 23 less than or equal to the recessed depth of the partitioning region 221, the flatness between the extension member 23 and the sub-basin 224 can be further improved, and the consistency between the surface of the extension member 23 facing the accommodating cavity 21 and the surface of the sub-basin 224 facing the accommodating cavity 21 can be improved, thereby reducing the risk of the extension member 23 protruding from the sub-basin 224 and interfering with the battery cell 10, thereby improving the reliability of the battery case 20.

[0072] In some embodiments, the dimension of the extension piece 23 in the width direction x2 is greater than or equal to 100 mm and less than or equal to 200 mm. The dimension of the extension piece 23 in the width direction x2 may be greater than or equal to 100 mm and less than or equal to 150 mm, or greater than or equal to 140 mm and less than or equal to 160 mm, or greater than or equal to 150 mm and less than or equal to 200 mm, and so on. Specifically, the dimension of the extension piece 23 in the width direction x2 may be 100 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 180 mm or 200 mm, and so on. Thus, by reasonably setting the width dimension of the extension piece 23, so that when the extension piece 23 is fixedly connected to the two sub-basins 224, the dimension of the battery case 20 in the width direction x2 is more reasonable, thereby improving the applicability of the battery case 20 and saving production costs.

[0073] Please combine Figure 7-Figure 9 , Figure 7 is based on Figure 6 The battery box 20 shown is a first cross-sectional schematic diagram along the BB direction; Figure 8 is based on Figure 6 The battery box 20 is shown as a second cross-sectional schematic diagram along the BB direction; Figure 9 is based on Figure 8 The diagram shows a partial enlarged view of the C region of the battery case 20.

[0074] It should be noted that if Figure 7 The cross-sectional view of the battery box 20 shown mainly shows the matching relationship between the sub-basin 224 and the extension member 23 when the colloid 25 is hidden. Figure 8 The cross-sectional view of the battery box 20 shown in FIG. Figure 9 The partially enlarged schematic diagram shown mainly shows the matching relationship between the colloid 25, the sub-basin 224 and the extension piece 23 when the colloid 25 is contained in the colloid storage tank 2212.

[0075] In some embodiments, a portion 2211 of each sub-basin 224 is provided with a glue storage tank 2212 extending along the extension direction x1, and the reinforcing member extension 23 is provided to cover the glue storage tank 2212. It is understood that the glue storage tank 2212 may store a colloid 25, and the extension 23 is provided to cover the glue storage tank 2212 to facilitate full contact between the colloid 25 and the extension 23, so that the colloid 25 provides adhesion and sealing between the sub-basin 224 and the extension 23, thereby improving the connection strength and sealing effect between the sub-basin 224 and the extension 23. It should be noted that the colloid 25 is fluid. The extension member 23 covers the glue reservoir 2212 and can squeeze the colloid 25 within the glue reservoir 2212. This allows the colloid 25 to overflow the trough 2212 under the pressure of the trough 2212 and the extension member 23 and flow along the contact surface between the extension member 23 and the sub-basin 224, thereby further increasing the contact area between the colloid 25, the extension member 23, and the sub-basin 224. In some applications, under the pressure of the extension member 23 and the glue reservoir 2212, the colloid 25 can flow toward both sides of the glue reservoir 2212 in the width direction x2. Specifically, the flow distance of the colloid 25 in the width direction x2 can be greater than or equal to 8 mm and less than or equal to 12 mm. The flow distance of the colloid 25 in the width direction x2 can be greater than or equal to 8 mm and less than or equal to 10 mm, or greater than or equal to 10 mm and less than or equal to 12 mm, etc. Specifically, the flow distance of the colloid 25 in the width direction x2 can be 8 mm, 10 mm, or 12 mm, etc. In some embodiments, under the pressure of the extension member 23 and the glue storage tank 2212, the colloid 25 can flow along the width direction x2 and pass over the extension member 23 away from the end surface of the other sub-basin 224. Thus, by covering the glue storage tank 2212 with the extension member 23, the extension member 23 is in full contact with the colloid 25 in the glue storage tank 2212, thereby facilitating adhesion and sealing between the sub-basin 224 and the extension member 23, thereby improving the reliability of the battery case 20.

[0076] In some embodiments, the dimension D2 from the glue tank 2212 to the end of the extension member 23 in the width direction x2 is greater than or equal to 3 mm and less than or equal to 6 mm. Specifically, the dimension D2 from the glue tank 2212 to the end of the extension member 23 in the width direction x2 can be greater than or equal to 3 mm and less than or equal to 4 mm, or greater than or equal to 3 mm and less than or equal to 5 mm, or greater than or equal to 5 mm and less than or equal to 6 mm, etc. Specifically, the dimension D2 from the glue tank 2212 to the end of the extension member 23 in the width direction x2 can be 3 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, or 6 mm, etc. Thus, by rationally setting the dimensions of the glue tank 2212 and the end of the extension member 23 in the width direction x2, the contact area between the glue 25 in the glue tank 2212 and the extension member 23 is increased, thereby improving the bonding and sealing effect between the sub-basin 224 and the extension member 23.

[0077] In some embodiments, the partial area 2211 and the extension piece 23 are welded and fixed, and the welding track 24 of the partial area 2211 and the extension piece 23 is located between the glue storage tank 2212 of the partial area 2211 and the end of the partial area 2211 close to the other sub-basin body 224. The partial area 2211 and the extension piece 23 can be welded and fixed by welding methods including but not limited to spot welding. Specifically, the welding track 24 of the partial area 2211 and the extension piece 23 can be continuous or intermittent. For example, the welding track 24 can include multiple welding points, and the multiple welding points are arranged at intervals in the extension direction x1. The number of welding tracks 24 can be one or more. For example, the number of welding tracks 24 can be two, and the two welding tracks 24 are arranged at intervals, and each welding track 24 extends in the extension direction x1. It should be noted that the welding track 24 is located between the glue storage tank 2212 of the partial area 2211 and the end of the partial area 2211 close to the other sub-basin 224, which can isolate the glue storage tank 2212 from the end of the partial area 2211 close to the other sub-basin 224, thereby alleviating the risk of the colloid 25 flowing and crossing the end of the partial area 2211 close to the other sub-basin 224, causing leakage of the colloid 25, and improving the sealing effect between the sub-basin 224 and the extension piece 23. Therefore, by setting the welding track 24 of the partial area 2211 and the extension piece 23 between the glue storage tank 2212 and the end of the partial area 2211 close to the other sub-basin body 224, it is convenient to reduce the difficulty of welding between the partial area 2211 and the extension piece 23, thereby improving the structural strength and connection stability of the extension piece 23 and the partial area 2211, and at the same time, it can reduce the risk of interference between the welding track 24 and the glue storage tank 2212, resulting in leakage of the glue 25 in the glue storage tank 2212, and improve the sealing effect between the sub-basin body 224 and the extension piece 23.

[0078] In summary, the battery case 20 provided in the present application is provided with a receiving cavity 21 for accommodating a battery cell 10. The battery case 20 includes a stamped basin 22, which defines a portion of the receiving cavity 21. The stamped basin 22 is provided with a partition area 221, which extends from a first side 222 of the stamped basin 22 to a second side 223 opposite to the first side 222. The partition area 221 is used to divide the stamped basin 22 into two separate sub-basins 224 along the extension direction x1 of the partition area 221. Thus, the battery case 20 forms a portion of the receiving cavity 21 through the stamped basin 22, thereby providing support and protection for the battery cell 10. At the same time, the stamped basin 22 can be divided into two separate sub-basins 224 by the partition area 221, thereby being able to adaptively change the size of the battery case 20, improving the flexibility of the battery case 20, and thereby broadening the application scenarios of the battery case 20 and saving production costs. Compared with other battery boxes, the battery box 20 provided in the present application has adjustable size and better flexibility and adaptability.

[0079] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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 box, characterized in that: The battery case is provided with a accommodating cavity for accommodating a battery cell, and the battery case includes a stamped basin, which defines a portion of the accommodating cavity. The stamped basin is provided with a separation area, which extends from a first side of the stamped basin to a second side opposite to the first side. The separation area is used to divide the stamped basin into two separate sub-basins along the extension direction of the separation area.

2. The battery box according to claim 1, characterized in that: The separation area is recessed toward the surface of the accommodating cavity.

3. The battery box according to claim 1, characterized in that: A dimension of the separation area along a width direction perpendicular to the extending direction is greater than or equal to 30 mm and less than or equal to 100 mm.

4. The battery box according to claim 1, characterized in that: The separation area is provided with at least two glue storage grooves, each of the glue storage grooves is extended along the extension direction, and at least two of the glue storage grooves are spaced apart along a width direction perpendicular to the extension direction.

5. The battery box according to claim 4, characterized in that: The depth of the glue storage groove is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

6. The battery box according to claim 1, characterized in that: The stamped basin body is divided into two separate sub-basins along the extension direction by the separation area. The battery box body also includes an extension piece, which is extended along the extension direction. The extension piece is fixedly connected to the two sub-basins in the width direction perpendicular to the extension direction.

7. The battery box according to claim 6, characterized in that: The separation area is recessed toward the surface of the accommodating cavity, the dimension of the extension piece in the width direction is larger than the dimension of the separation area in the width direction, each of the sub-basin bodies includes a partial area of ​​the separation area, and the extension piece is respectively connected to the recesses of the partial areas of the two sub-basin bodies in the width direction.

8. The battery box according to claim 7, characterized in that: The thickness of the extension member is less than or equal to the recessed depth of the separation area.

9. The battery box according to claim 7, characterized in that: The partial area of ​​each sub-basin body is provided with a glue storage groove extending along the extension direction, and the extension piece covers the glue storage groove.

10. The battery box according to claim 9, characterized in that: The dimension from the glue storage tank to the end of the extension piece in the width direction is greater than or equal to 3 mm and less than or equal to 6 mm.

11. The battery case according to claim 9, characterized in that: The partial area and the extension piece are welded and fixed, and a welding track of the partial area and the extension piece is located between the glue storage tank of the partial area and an end of the partial area close to the other sub-basin body.

12. The battery case according to any one of claims 6 to 11, characterized in that: The dimension of the extension piece in the width direction is greater than or equal to 100 mm and less than or equal to 200 mm.

13. A battery device, characterized in that: The battery device includes a battery cell assembly and a battery box according to any one of claims 1 to 12, and the battery cell assembly is arranged in the accommodating cavity.

14. An electrical device, characterized in that: The electrical device comprises the battery device as claimed in claim 13.

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