Battery box, battery and electrical device

Abstract

The embodiments of the present application provide a battery case, a battery, and an electrical device, wherein the case includes a base plate and a plurality of side beams, wherein the plurality of side beams are connected to the base plate and enclosed with the base plate to form a storage space. At least one side beam includes a beam body and a reinforcement portion, wherein the reinforcement portion protrudes from the surface of the beam body facing the storage space, and the reinforcement portion is provided with an avoidance structure, and the avoidance structure is used to avoid the components accommodated in the storage space. The embodiments of the present application provide a reinforcement portion on at least one side beam, thereby improving the structural strength of the side beam and reducing the risk of deformation of the battery. The reinforcement portion is provided on the surface of the beam body facing the storage space, and the presence of the reinforcement portion will not increase the overall volume of the battery, and can also reduce the distance between the battery cell and the side beam, thereby improving the adhesive strength between the battery cell and the side beam, and thus strengthening the structural strength of the battery.

Description

Technical Field

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

[0002] Currently, batteries are widely used in various electrical devices, such as vehicles. During the operation of some electrical devices, they are often accompanied by movement or vibration. In this case, how to improve the structural strength of batteries is extremely important. Summary of the Invention

[0003] The present application provides a battery box, a battery, and an electrical device, which can improve the structural strength of the battery.

[0004] In a first aspect, embodiments of the present application provide a battery housing comprising a base plate and a plurality of side beams connected to the base plate and enclosing a storage space. At least one side beam comprises a beam body and a reinforcement portion, the reinforcement portion protruding from a surface of the beam body facing the storage space and provided with a relief structure for avoiding components housed in the storage space.

[0005] In the embodiments of the present application, by providing a reinforcement on the side beam, the thickness of the side beam at the location corresponding to the reinforcement is increased. Increased thickness often means increased structural strength, thereby improving the side beam's compressive resistance and reducing the risk of battery deformation. The reinforcement is provided on the surface of the beam body facing the storage space. The presence of the reinforcement does not increase the overall volume of the battery and can also reduce the distance between the battery cell and the side beam, improving the adhesive strength between the battery cell and the side beam, thereby strengthening the structural strength of the battery.

[0006] In some embodiments, the reinforcement portion includes a plurality of convex portions arranged at intervals, and the plurality of convex portions are arranged at intervals along the extension direction of the beam body.

[0007] In an embodiment of the present application, a plurality of protrusions are arranged to be spaced apart in the extension direction of the beam body, so that the gaps formed between two adjacent protrusions can be arranged in the extension direction of the beam body, thereby avoiding more components or structures located inside the battery and meeting the needs of the internal structural layout of the battery.

[0008] In some embodiments, the plurality of protrusions are arranged at equal intervals along the extension direction of the beam body.

[0009] In the embodiment of the present application, the multiple gaps formed by the multiple protrusions can more easily avoid components inside the battery, such as heat exchange plates, and the equal interval arrangement is also conducive to standardizing the internal structure of the battery and improving the reliability of the internal structure layout of the battery.

[0010] In some embodiments, the avoidance structure includes a gap formed between two adjacent protrusions, and in the extension direction of the beam body, the minimum width of the gap is L1, 1mm≤L1≤1500mm.

[0011] In the embodiment of the present application, by setting the spacing L1 between two adjacent protrusions to between 1mm and 1500mm, the width of the gap is ensured to be sufficient to avoid the need, while ensuring that the side beam has a certain structural strength to meet the actual use requirements of the battery.

[0012] In some embodiments, 5 mm ≤ L1 ≤ 20 mm.

[0013] In some embodiments, the protrusion includes a first plate and a second plate connected to each other, the first plate is located on a side of the second plate facing away from the substrate, and the first plate and the second plate intersect, wherein the avoidance structure includes an avoidance space located on the side of the first plate facing away from the substrate.

[0014] In the embodiment of the present application, the space between the battery cell and the beam body can be reasonably used to ensure the compactness of the internal structure of the battery, and the risk of debonding between the side beam and the battery cell can be reduced, thereby improving the reliability of battery use.

[0015] In some embodiments, the second plate extends along the thickness direction of the substrate and abuts against the substrate.

[0016] In an embodiment of the present application, the second plate is configured to extend along the thickness direction of the substrate and abut against the substrate, so that the second plate can play a certain supporting role when the battery is inverted, thereby improving the supporting capacity of the side beam and ensuring the overall compressive resistance of the battery.

[0017] In some embodiments, the first plate body, the second plate body, and the beam body together enclose a receiving cavity, and the protrusion further includes a reinforcing rib disposed in the receiving cavity.

[0018] In the embodiment of the present application, reinforcing ribs are provided in the convex portions to improve the strength and compressive strength of each convex portion, thereby further enhancing the overall structural strength of the battery.

[0019] In some embodiments, the plurality of side beams include two first side beams and two second side beams, the two first side beams being spaced apart along the width direction of the box body, and the two second side beams being spaced apart along the length direction of the box body. Each second side beam connects two first side beams, and each first side beam includes a beam body and a reinforcement portion.

[0020] In the embodiment of the present application, a reinforcement portion is added to the first side beam, which increases the structural strength of the first side beam while reducing the distance between the first side beam and the battery cell, thereby reducing the risk of debonding problems.

[0021] In some embodiments, the maximum length dimension of the box is L2, and L1 and L2 satisfy: 0.0002≤L1 / L2≤0.5.

[0022] In the embodiment of the present application, L1 / L2 is set between 0.0002 and 20, so that the internal layout of the battery is reasonable and can meet the requirements of battery structural strength.

[0023] In some embodiments, 0.001<L1 / L2≤0.3.

[0024] In a second aspect, an embodiment of the present application provides a battery, comprising a housing according to any of the aforementioned embodiments and a battery cell, wherein the battery cell is accommodated in a accommodating space.

[0025] In some embodiments, the battery includes a thermal management component, the thermal management component is accommodated in the accommodation space, and the avoidance structure is used to avoid at least a portion of the thermal management component.

[0026] In the embodiments of the present application, the reinforcement is provided with a relief structure for avoiding the thermal management components. The presence of the reinforcement can improve the structural strength of the side beams and reduce the risk of battery deformation without affecting the thermal management components. Furthermore, the reinforcement does not increase the overall volume of the battery. It can also reduce the distance between the battery cells and the side beams, reducing the width of the adhesive between the battery cells and the side beams, and reducing the risk of debonding. This makes it suitable for various operating conditions such as movement and vibration.

[0027] In some embodiments, the thermal management component includes a plurality of spaced-apart heat exchange plates, with battery cells disposed between adjacent heat exchange plates. The reinforcement portion includes a plurality of spaced-apart protrusions, and the relief structure includes a gap between two adjacent protrusions, the gap being configured to accommodate ends of the heat exchange plates.

[0028] In the embodiment of the present application, multiple protrusions are arranged in an intermittent manner, thereby forming gaps between adjacent protrusions that can accommodate the ends of the heat exchange plates. Furthermore, the presence of these gaps not only provides a clearance effect but also, to a certain extent, provides a positioning effect for the heat exchange plates and battery cells. Therefore, during the battery manufacturing process, the battery cells can be positioned precisely by inserting the ends of the heat exchange plates into the gaps.

[0029] In some embodiments, the thermal management component includes a manifold, which connects the plurality of heat exchange tubes, and the manifold is at least partially located in the avoidance space.

[0030] In this embodiment of the present application, a manifold enables connectivity between multiple heat exchange plates. The manifold is typically located between the battery cells and the main beam body, and the reinforcement is also located between the battery cells and the main beam body. Based on this, this embodiment of the present application tilts the first plate relative to the second plate, creating a clearance space for the manifold on the side of the first plate away from the baseplate, effectively utilizing the space between the battery cells and the main beam body.

[0031] In a third aspect, an embodiment of the present application provides an electrical device, comprising a battery in any of the aforementioned embodiments, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. 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.

[0033] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0034] Figure 2 An exploded schematic diagram of a battery provided in some embodiments of the present application;

[0035] Figure 3 for Figure 2 A schematic structural diagram of a side beam in the battery shown;

[0036] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of the middle region Q;

[0037] Figure 5 A schematic diagram of the structure of a thermal management component in a battery provided in some embodiments of the present application;

[0038] Figure 6 A schematic structural diagram of a side beam in a battery provided in some embodiments of the present application;

[0039] Figure 7 Schematic diagram of the structure of the battery provided in some embodiments of the present application.

[0040] In the drawings, the drawings are not drawn to scale.

[0041] In the attached figure:

[0042] 1000, vehicle;

[0043] 100, battery; 200, controller; 300, motor; 400, housing;

[0044] 11. Baseboard; 12. Side beam; 12a. First side beam; 12b. Second side beam; 121. Beam body; 122. Reinforcement portion; 1221. Protrusion; 1221a. First plate body; 1221b. Second plate body; 1221c. Accommodation cavity; 1221d. Reinforcement rib; 123. Avoidance structure; 1231. Gap; 1232. Avoidance space; 13. Accommodation space; 14. Cover plate;

[0045] 20. Battery cells;

[0046] 30. Thermal management components; 31. Heat exchange plate; 32. Manifold;

[0047] X, width direction; Y, length direction; Z, thickness direction. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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).

[0054] 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.

[0055] 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.

[0056] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0057] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0058] The term "plurality" used in this application refers to two or more (including two).

[0059] In the present application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0060] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery cell or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0061] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The uncoated positive electrode collector protrudes from the coated positive electrode collector, and the uncoated positive electrode collector serves as the positive electrode tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The uncoated negative electrode collector protrudes from the coated negative electrode collector, and the uncoated negative electrode collector serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon. To ensure that high current can pass without melting, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together. The separator can be made of polypropylene (PP) or polyethylene (PE). In addition, the electrode assembly can be a wound structure or a laminated structure, but the embodiments of the present application are not limited to this.

[0062] For electrical devices such as vehicles, the battery will move or vibrate along with the device. The applicant has noticed that during long-term use, the side beams of the battery box are prone to deformation, resulting in insufficient structural strength of the battery.

[0063] The applicant's research found that the above-mentioned problem occurs because: inside the battery, the battery cell is fixed to the substrate by bonding, and part of the colloid between the battery cell and the substrate overflows to the side of the battery cell, thereby achieving bonding between the side beam and the battery cell. However, due to the limitations of the internal structure of the battery, the distance between the battery cell and the side beam is too large. Under vibration or other working conditions, the colloid between the battery cell and the side beam is prone to debonding, resulting in the side beam and the battery cell being unable to be connected as a whole. In addition, the thickness of the side beam of the battery box is usually thin, resulting in insufficient side wall stiffness. Therefore, when subjected to external force impact, the outside of the side wall is prone to bumps and dents. Therefore, how to improve the structural strength of the battery is an urgent problem to be solved.

[0064] Based on the aforementioned issues identified by the applicant, the present application provides a battery housing, comprising a base plate and a plurality of side beams connected to the base plate and enclosing a storage space. At least one side beam comprises a beam body and a reinforcement portion, the reinforcement portion protruding from a surface of the beam body facing the storage space, the reinforcement portion being provided with a relief structure for avoiding components stored in the storage space.

[0065] This application provides a reinforcement on at least one side beam, increasing the thickness of the side beam at the location corresponding to the reinforcement. Increased thickness often means increased structural strength, thereby improving the side beam's compressive strength and reducing the risk of battery deformation. The reinforcement is provided on the surface of the beam body facing the storage space. The presence of the reinforcement does not increase the overall volume of the battery and can also reduce the distance between the battery cell and the side beam, improving the adhesive strength between the battery cell and the side beam, thereby strengthening the structural strength of the battery.

[0066] The technical solutions described in the embodiments of the present application are applicable to electrical devices that use batteries, such as battery vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc., among which spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0067] The battery cells described in the embodiments of the present application are not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0068] See also Figure 1The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 may be provided inside the vehicle 1000. Specifically, for example, the battery 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used, for example, to control the battery to power the motor 300. The battery may be used for starting and navigating the vehicle 1000. Of course, the battery 100 may also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.

[0069] See also Figure 2 The battery includes a box body 400 and a battery cell 20 , and the battery cell 20 is accommodated in the box body 400 .

[0070] In the battery 100, there can be one or more battery cells 20. If there are multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in a hybrid connection. Hybrid connection refers to the multiple battery cells 20 being connected both in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 20 is housed within the housing 400. Of course, multiple battery cells 20 can also be first connected in series, in parallel, or in a hybrid connection to form a battery module (not shown in the figure), and the multiple battery modules are then connected in series, in parallel, or in a hybrid connection to form a single unit and housed within the housing 400.

[0071] The structure of the box body 400 is described in detail below with reference to the accompanying drawings.

[0072] This embodiment of the application provides a battery box 400, please refer to Figure 2 and Figure 3 The box body 400 includes a base plate 11 and a plurality of side beams 12. The plurality of side beams 12 are connected to the base plate 11 and enclose a storage space 13 together with the base plate 11. At least one side beam 12 includes a beam body 121 and a reinforcement portion 122. The reinforcement portion 122 protrudes from the surface of the beam body 121 facing the storage space 13. The reinforcement portion 122 is provided with an avoidance structure 123 for avoiding components stored in the storage space 13.

[0073] The base plate 11 may be the bottom plate of the box body 400. The base plate 11 and the plurality of side beams 12 together enclose a storage space 13. The battery cells 20 are disposed in the storage space 13. The base plate 11 is used to support and secure the battery cells 20. For example, the battery cells 20 are secured to the base plate 11 by bonding, with some of the adhesive overflowing between the battery cells 20 and the side beams 12 to secure the battery cells 20 to the side beams 12.

[0074] The multiple side beams 12 are connected end to end to enclose the side walls of the box 400. The multiple side beams 12 can be a one-piece structure or a separate structure, and are connected together to form an annular structure through bonding, welding, plug-in connection, and bolt connection. The annular structure includes but is not limited to square rings and circular rings. The multiple side beams 12 are also connected to the base plate 11 through methods such as welding, bonding, and bolt connection.

[0075] In the embodiment of the present application, each side beam 12 includes a beam body 121, but only one side beam 12 among the multiple side beams 12 may include a reinforcement portion 122. Alternatively, some or all of the side beams 12 may include a reinforcement portion 122, and the embodiment of the present application is not limited to this. A reinforcement portion 122 is added to at least some of the side beams 12, and the reinforcement portion 122 is connected to the beam body 121. The connection method between the reinforcement portion 122 and the beam body 121 includes but is not limited to welding, bonding, and bolting. The provision of the reinforcement portion 122 can increase the strength of the side beam 12, improve the overall strength and impact resistance of the side beam 12, and reduce the risk of deformation of the side beam 12.

[0076] The reinforcement portion 122 is provided on the surface of the beam body 121 facing the accommodating space 13. This design improves the strength of at least a portion of the side beam 12 without increasing the overall size of the battery, thereby ensuring the structural strength of the battery. Furthermore, the presence of the reinforcement portion 122 reduces the distance between the battery cells 20 and the side beam 12, improving the adhesive strength between the battery cells 20 and the side beam 12, thereby strengthening the structural strength of the battery.

[0077] Due to the limitations of the battery's internal structural layout, some components are located between the battery cells 20 and the beam body 121, resulting in an excessively large distance between the battery cells 20 and at least a portion of the beam body 121. To prevent interference between the reinforcement portion 122 and components within the battery, this embodiment of the present application includes a relief structure 123. This relief structure 123 is used to clear the battery components contained within the accommodating space 13. This relief structure 123 includes, but is not limited to, holes, slots, notches, or other structures.

[0078] The avoidance structure 123 is used to avoid at least some components located in the accommodation space 13 to ensure a reliable internal layout of the battery. The specific structure of the reinforcement portion 122 and the avoidance structure 123 needs to be determined according to the internal layout of the battery, and the embodiment of the present application does not limit this.

[0079] In this embodiment of the present application, a reinforcement portion 122 is provided on at least one side beam 12, thereby increasing the thickness of the side beam 12 at the location corresponding to the reinforcement portion 122. Increased thickness often means increased structural strength, thereby improving the compressive strength of the side beam 12 and reducing the risk of battery deformation. The reinforcement portion 122 is provided on the surface of the beam body 121 facing the accommodating space 13. The presence of the reinforcement portion 122 does not increase the overall volume of the battery and can also reduce the distance between the battery cell 20 and the side beam 12, thereby increasing the adhesive strength between the battery cell and the side beam, thereby improving the overall structural strength of the battery.

[0080] In addition, the box body 400 may further include a cover plate 14 in addition to the base plate 11 and the side beams 12 . The base plate 11 and the cover plate 14 are spaced apart in the thickness direction Z of the base plate 11 .

[0081] For example, in addition to the battery cells 20 , the battery also includes a thermal management component 30 . The thermal management component 30 is used to adjust the temperature of the battery cells 20 inside the battery to ensure that the battery cells 20 can maintain a suitable temperature for operation.

[0082] like Figure 5 As shown, the thermal management component 30 includes a heat exchange plate 31 and a manifold 32 for connecting multiple heat exchange plates 31. The heat exchange plate 31 is placed in contact with or adjacent to the battery cell 20 and is the main component for regulating the temperature of the battery cell 20. The heat exchange plate 31 usually has channels for fluid to pass through. When the battery needs to cool down, cold fluid can be delivered to the heat exchange plate 31. The cold fluid flows in the channels and removes some of the heat from the battery cell 20, thereby achieving a cooling operation. When the battery needs to heat up, hot fluid can be delivered to the heat exchange plate 31. The hot fluid flows in the channels and provides some heat to the corresponding battery cell 20, thereby achieving a heating operation.

[0083] The manifold 32 communicates with the channels of the heat exchange plates 31 and is used to transport or transfer hot and cold fluids to one or more heat exchange plates 31. The manifold 32 is typically located between the battery cells 20 and the side beam 12. The presence of the manifold 32 increases the distance between the battery cells 20 and the main beam. The adhesive between the battery cells 20 and the main beam hardly secures the battery cells 20, making it prone to debonding during movement or vibration. Optionally, a clearance structure 123 is used to clear the thermal management components 30 in the battery.

[0084] It should be noted that in the embodiment of the present application, the reinforcement portion 122 can be a continuous long strip structure and fixed to the beam body, or it can be composed of multiple parts and arranged side by side on the beam body. The embodiment of the present application does not limit this.

[0085] In some embodiments, see Figures 2 to 4 The reinforcement portion 122 includes a plurality of convex portions 1221 arranged at intervals, and the plurality of convex portions 1221 are arranged at intervals along the extending direction of the beam body 121 .

[0086] Multiple protrusions 1221 are mounted on the same beam body 121, and mounting methods include, but are not limited to, bonding, welding, and bolting. The dimensions and shapes of the multiple protrusions 1221 can be the same or different, as long as each protrusion 1221 is located on the surface of the beam body facing the receiving space 13 and protrudes away from the beam body 121. The present embodiment does not limit the arrangement of the multiple protrusions 1221. For example, the multiple protrusions 1221 can be arranged side by side along the thickness direction Z of the substrate 11.

[0087] The extension direction of the beam body 121 is the length direction of the beam body 121. The plurality of protrusions 1221 are arranged at intervals along the extension direction of the beam body 121, that is, the plurality of protrusions 1221 are arranged side by side in the extension direction of the beam body 121. The lengths of the protrusions 1221 in the extension direction of the beam body 121 can be the same or different, and the spacing between adjacent protrusions 1221 can also be the same or different.

[0088] Multiple protrusions 1221 are spaced apart to form gaps 1231 between adjacent protrusions 1221. Gaps 1231 are provided to provide clearance for certain structures within the battery. For example, gaps 1231 are provided to provide clearance for heat exchange plates 31 within the battery's thermal management component 30. At least some ends of heat exchange plates 31 can extend into gaps 1231, which are used to accommodate the ends of heat exchange tubes. In addition to providing clearance, gaps 1231 also serve to a certain extent as position limiters, restricting the movement of structures within gaps 1231. This ensures the stability of the battery's internal structure during movement or vibration.

[0089] When a battery includes multiple battery cells 20, typically, the multiple battery cells 20 are arranged side by side along the extension direction of the beam body 121. Similarly, multiple components within the battery can also be arranged side by side along the extension direction of the beam body 121. Therefore, based on this, in the embodiment of the present application, multiple protrusions 1221 are arranged at intervals along the extension direction of the beam body 121, so that the gaps 1231 formed between two adjacent protrusions 1221 can be arranged along the extension direction of the beam body 121. This avoids more components or structures within the battery, meeting the requirements of the battery's internal structural layout.

[0090] In some embodiments, the plurality of protrusions 1221 are arranged at equal intervals along the extension direction of the beam body 121 , and the minimum width L1 of a gap formed by two adjacent protrusions 1221 remains consistent.

[0091] The gaps 1231 in this design are suitable for accommodating evenly spaced components within the battery. For example, when a battery contains multiple battery cells 20, heat exchange plates 31 are positioned between adjacent battery cells 20. As can be seen from the above, the battery cells 20 are arranged along the extension direction of the beam body 121, and are typically spaced evenly between the battery cells 20. In summary, the heat exchange plates 31 are also spaced evenly along the extension direction of the beam body 121.

[0092] Therefore, the embodiment of the present application arranges multiple protrusions 1221 at equal intervals along the extension direction of the beam body 121, which can make it easier for the multiple gaps 1231 formed by the multiple protrusions 1221 to avoid components inside the battery, such as the heat exchange plate 31. At the same time, the equal interval arrangement is also conducive to standardizing the internal structure of the battery and improving the reliability of the internal structure layout of the battery.

[0093] In some embodiments, the avoidance structure 123 includes a gap 1231 formed between two adjacent protrusions 1221. In the extension direction of the beam body, the minimum width of the gap is L1, 1 mm ≤ L1 ≤ 1500 mm. For example, L1 is one of 1 mm, 10 mm, 100 mm, 1000 mm, and 1500 mm.

[0094] The spacing between two adjacent protrusions 1221 is the minimum width L1 of gap 1231. If width L1 is too small, gap 1231 is too narrow, making it difficult for components within the battery to enter gap 1231 and thus failing to provide a safe passage. If width L1 is too large, the total extent of the protrusions 1221 along the extension direction of the beam body 121 is too small, meaning the protrusions 1221 are too small. In this case, the reinforcing effect of the reinforcement 122 is insufficient, and the battery still suffers from insufficient structural strength.

[0095] In this embodiment of the present application, the minimum width L1 of gap 1231 is set between 1mm and 1500mm, ensuring that gap 1231 is wide enough to avoid collisions while also ensuring that side beam 12 has a certain structural strength to meet the actual battery usage requirements. Furthermore, optionally, 5mm ≤ L1 ≤ 20mm. For example, L1 is one of 5mm, 10mm, 15mm, and 20mm.

[0096] In some embodiments, the protrusion 1221 includes a first plate 1221a and a second plate 1221b connected to each other, with the first plate 1221a located on a side of the second plate 1221b facing away from the substrate 11, and the first plate 1221a and the second plate 1221b intersecting. The avoidance structure 123 includes an avoidance space 1232 located on the side of the first plate 1221a facing away from the substrate 11.

[0097] See also Figure 2 、 Figure 3 and Figure 6 The convex portion 1221 includes a first plate 1221a and a second plate 1221b. The first plate 1221a and the second plate 1221b are connected to each other. The two can be an integral structure or can be connected and fixed by welding, bonding, etc. The second plate 1221b is closer to the substrate 11 than the first plate 1221a. The second plate 1221b can be designed to be separate from the substrate 11, or it can be directly in contact with the substrate 11 and fixed as an integral whole.

[0098] The first plate 1221a and the second plate 1221b are both plate-shaped structures and are intersecting. Intersection here means that the plane corresponding to the first plate 1221a and the plane corresponding to the second plate 1221b are non-parallel and form a certain angle. The specific directions of the planes corresponding to the first plate 1221a and the second plate 1221b are not limited in this embodiment of the application.

[0099] Both the first plate 1221a and the second plate 1221b can strengthen the strength of the side beam 12, and some components inside the battery will be located between the battery cell 20 and the beam body 121. In order to avoid such components, the embodiment of the present application tilts the first plate 1221a relative to the second plate 1221b to form an avoidance space 1232 on the side of the first plate 1221a away from the second plate 1221b.

[0100] It should be noted that while the avoidance space 1232 is outlined in dashed lines in the figure, the shape and size of the avoidance space 1232 are not limited to those shown in the figure. That is, the avoidance space 1232 in the figure does not constitute a limitation on the shape and size of the avoidance space 1232 in the embodiments of the present application. Optionally, the manifold 32 in the battery is at least partially located within the avoidance space 1232.

[0101] This design can reasonably space the battery cell 20 and the beam body to ensure the compactness of the internal structure of the battery, and can also reduce the risk of debonding between the side beam 12 and the battery cell 20, thereby improving the reliability of battery use.

[0102] In some embodiments, the second plate 1221 b extends along the thickness direction Z of the substrate 11 and abuts against the substrate 11 .

[0103] The base plate 11 serves as the base of the box and can be bonded and fixed to the battery cells 20. However, in actual use, the battery may need to be installed upside down in some cases, with the base plate 11 positioned above the battery cells 20. In this case, the side beams 12 support the base plate 11 and act to apply external forces to it.

[0104] On this basis, the embodiment of the present application sets the second plate 1221b to extend along the thickness direction Z of the substrate 11 and abut against the substrate 11, so that the second plate 1221b can play a certain supporting role when the battery is inverted, thereby improving the supporting capacity of the side beam 12 and ensuring the overall compressive resistance of the battery.

[0105] In some embodiments, as Figure 2 and Figure 6 As shown, the first plate body 1221a, the second plate body 1221b and the beam body together enclose a receiving cavity 1221c, and the protrusion 1221 further includes a reinforcing rib 1221d arranged in the receiving cavity 1221c.

[0106] The first plate 1221a, the second plate 1221b, and the beam body together form a receiving cavity 1221c. The first and second plates 1221a, 1221b also separate the receiving cavity 1221c from the receiving space 13. The size and shape of the receiving cavity 1221c are determined by the position and angle of the first and second plates 1221a, 1221b relative to the beam body 121. Alternatively, the receiving cavity 1221c may have a right-angled trapezoidal structure.

[0107] The reinforcing ribs 1221d are disposed within the accommodating cavity 1221c. The reinforcing ribs 1221d may include one or more ribs, and the ends of each rib may be connected to any of the first plate 1221a, the second plate 1221b, and the beam body 121. Furthermore, the reinforcing ribs 1221d in each protrusion 1221 may be identical or different. In this embodiment of the present application, by providing the reinforcing ribs 1221d within the protrusion 1221, the strength and compressive resistance of each protrusion 1221 are improved, further enhancing the overall structural strength of the battery.

[0108] In some optional embodiments, reinforcing ribs may also be provided in the beam body 121 .

[0109] In some embodiments, see Figure 2 、 Figure 3 as well as Figure 7 The multiple side beams 12 include two first side beams 12a and two second side beams 12b. The two first side beams 12a are spaced apart along the width direction X of the box body, and the two second side beams 12b are spaced apart along the length direction Y of the box body, where the length direction X intersects the width direction Y. Each second side beam 12b connects the two first side beams 12a. Each first side beam 12a includes a beam body 121 and a reinforcement portion 122.

[0110] The width direction X and the length direction Y are the extension direction of the narrow side and the direction of the long side of the box respectively. For example, the width direction X is perpendicular to the length direction Y.

[0111] The two first side beams 12a extend along the length direction Y and are arranged side by side in the width direction X. The two second side beams 12b extend along the width direction X and are arranged in the length direction Y. The two first side beams 12a and the two second side beams 12b are interconnected and enclose a receiving space 13. Regarding the extension direction of the side beams 12 mentioned in the aforementioned embodiments, when the side beams 12 are the first side beams 12a, the extension direction of the side beams 12 is the length direction Y; when the side beams 12 are the second side beams 12b, the extension direction of the side beams 12 is the width direction X.

[0112] As can be seen from the foregoing, the presence of the reinforcement 122 is due to the internal battery components occupying the space between the battery cells 20 and the beam body 121, thereby increasing the distance between the battery cells 20 and the beam body 121, which can easily lead to debonding and insufficient structural strength. For example, the manifold 32 located between the battery cells 20 and the beam body 121 can cause the aforementioned problems. Furthermore, the manifold 32 is typically located on one or both sides of the battery cells 20 in the width direction X. This means that the manifold 32 can cause the distance between the beam body and the battery cells 20 in the first side beam 12a to be excessively large.

[0113] On this basis, the embodiment of the present application adds a reinforcement portion 122 to the first side beam 12a, which increases the structural strength of the first side beam 12a while reducing the distance between the first side beam 12a and the battery cell 20, thereby reducing the risk of debonding problems.

[0114] It should be noted that the second side beam 12b may include only the beam body 121, or may include both the beam body 121 and the reinforcement portion 122, and this embodiment of the present application does not limit this.

[0115] In some embodiments, see Figure 4 and Figure 7The maximum dimension of the box in the length direction Y is L2, and L1 and L2 satisfy: 0.0002≤L1 / L2≤0.5. Exemplarily, L1 / L2 is one of 0.0002, 0.0005, 0.005, 0.02, and 0.5.

[0116] A ratio of L1 / L2 that is too large or too small indicates problems with the battery's internal structural layout. Specifically, when L1 / L2 is too small, it becomes difficult to insert battery components into the gaps 1231 between adjacent protrusions 1221, leading to structural layout inconsistencies. When L1 / L2 is too large, it indicates that the protrusions 1221 are too small and cannot meet the required structural strength.

[0117] Therefore, in this embodiment of the application, L1 / L2 is set between 0.0002 and 0.5, so that the internal layout of the battery is reasonable and the required battery structural strength can be met. Optionally, 0.001<L1 / L2≤0.3. Exemplarily, L1 / L2 is one of 0.001, 0.01, 0.1, and 0.3.

[0118] In a second aspect, the present application provides a battery, such as Figure 2 As shown, the battery includes the box body 100 of any of the aforementioned embodiments and a battery cell 20 , and the battery cell 20 is accommodated in the accommodation space 13 .

[0119] It should be noted that the battery provided in the embodiment of the present application has the beneficial effects of the box 400 in any of the aforementioned embodiments. Please refer to the aforementioned description of the box 400 for details, and the embodiment of the present application will not be repeated.

[0120] In some embodiments, as Figures 2 to 5 As shown, the battery includes a thermal management component 30 , which is accommodated in the accommodation space 13 , and the avoidance structure 123 is used to avoid at least a portion of the thermal management component 30 .

[0121] In this embodiment of the present application, the reinforcement 122 is provided with a relief structure 123 for avoiding the thermal management component 30. The presence of the reinforcement 122 can improve the structural strength of the side beam 12 and reduce the risk of battery deformation without affecting the thermal management component 30. Furthermore, the presence of the reinforcement 122 does not increase the overall battery volume. It can also reduce the distance between the battery cell 20 and the side beam 12, thereby reducing the width of the adhesive between the battery cell 20 and the side beam 12, and reducing the risk of debonding. This makes it suitable for various operating conditions such as movement and vibration.

[0122] In some embodiments, the thermal management component 30 includes a plurality of spaced heat exchange plates 31, with battery cells 20 disposed between adjacent heat exchange plates 31. The reinforcement portion 122 includes a plurality of spaced protrusions 1221, and the relief structure 123 includes a gap 1231 between two adjacent protrusions 1221. The gap 1231 is used to accommodate the ends of the heat exchange plates 31.

[0123] The multiple heat exchange plates 31 can regulate the temperature of the multiple battery cells 20. Both the battery cells 20 and the heat exchange plates 31 are located within the accommodation space 13. However, unlike the battery cells 20, the ends of the heat exchange plates 31 partially protrude from the accommodation space 13. To avoid the ends of the heat exchange plates 31, the embodiment of the present application arranges the multiple protrusions 1221 in an intermittent arrangement, thereby forming gaps 1231 between adjacent protrusions 1221 to accommodate the ends of the heat exchange plates 31. In addition to providing a clearance effect, the presence of the gaps 1231 can also, to a certain extent, limit the position of the heat exchange plates 31 and the battery cells 20. Therefore, during the battery preparation process, the battery cells 20 can be positioned by inserting the ends of the heat exchange plates 31 into the gaps 1231.

[0124] In some embodiments, the thermal management component 30 includes a manifold 32 , which connects the plurality of heat exchange tubes. The manifold 32 is at least partially located in the avoidance space 1232 .

[0125] In the embodiment of the present application, the manifold 32 enables communication between multiple heat exchange plates 31. The manifold 32 is typically located between the battery cells 20 and the beam body 121. Similarly, the reinforcement portion 122 is also located between the battery cells 20 and the beam body 121. On this basis, in the embodiment of the present application, the first plate 1221a is tilted relative to the second plate 1221b, thereby forming an escape space 1232 for the manifold 32 on the side of the first plate 1221a away from the base plate 11, effectively utilizing the space between the battery cells 20 and the beam body 121.

[0126] In a third aspect, an embodiment of the present application provides an electrical device comprising a battery in any of the aforementioned embodiments.

[0127] It should be noted that the electrical device provided in the embodiment of the present application has the beneficial effects of the battery in any of the aforementioned embodiments. Please refer to the aforementioned description of the battery for details, and the embodiment of the present application will not be repeated.

[0128] According to some embodiments of the present application, Figures 2 to 6As shown, the battery includes a housing 400, battery cells 20, and a thermal management component 30. The housing 400 includes a base plate 11 and multiple side beams 12. The side beams 12 are connected to the base plate 11 and enclose a storage space 13 with the base plate 11. At least one side beam 12 includes a beam body 121 and a reinforcement 122. The reinforcement 122 protrudes from the surface of the beam body 121 facing the storage space 13. The reinforcement 122 includes multiple protrusions 1221 arranged at equal intervals along the extension direction of the beam body 121, with gaps 1231 formed between adjacent protrusions 1221. The protrusions 1221 include a first plate 1221a and a second plate 1221b connected to each other. The first plate 1221a is located on the side of the second plate 1221b facing away from the base plate 11. The first plate 1221a and the second plate 1221b intersect, and a clearance space 1232 is formed on the side of the first plate 1221a facing away from the base plate 11.

[0129] The heat management component 30 includes a plurality of heat exchange plates 31 spaced apart and a manifold 32 connecting the plurality of heat exchange plates 31. The gaps 1231 are used to accommodate the ends of the heat exchange plates 31, and the manifold 32 is at least partially located in the avoidance space 1232.

[0130] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0131] 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 of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery box, characterized in that: include: substrate; as well as A plurality of side beams are connected to the base plate and enclosed with the base plate to form a receiving space. Wherein, at least one of the side beams includes a beam body and a reinforcement portion, wherein the reinforcement portion protrudes from a surface of the beam body facing the accommodation space, and the reinforcement portion is provided with an avoidance structure, wherein the avoidance structure is used to avoid components accommodated in the accommodation space; The reinforcement portion includes a plurality of convex portions arranged at intervals, wherein the plurality of convex portions are arranged at intervals along the extension direction of the beam body, and the avoidance structure includes a gap formed between two adjacent convex portions, and in the extension direction of the beam body, the minimum width of the gap is L1, 1mm≤L1≤1500mm; The box body further includes a cover plate, and the base plate and the cover plate are spaced apart in a thickness direction of the base plate.

2. The box according to claim 1, characterized in that The plurality of protrusions are arranged at equal intervals along an extending direction of the beam body.

3. The box according to claim 1, characterized in that 5mm≤L1≤20mm.

4. The box according to claim 1, characterized in that The convex portion includes a first plate body and a second plate body connected to each other, the first plate body is located on a side of the second plate body away from the base plate, and the first plate body intersects with the second plate body; Wherein, the avoidance structure includes a avoidance space located on a side of the first plate body facing away from the base plate.

5. The box according to claim 4, characterized in that: The second plate extends along the thickness direction of the substrate and abuts against the substrate.

6. The box according to claim 4, characterized in that: The first plate body, the second plate body and the beam body together enclose a receiving cavity, and the protrusion further includes a reinforcing rib arranged in the receiving cavity.

7. The box according to any one of claims 1 to 6, characterized in that: The plurality of side beams include two first side beams and two second side beams, the two first side beams are spaced apart along the width direction of the box body, and the two second side beams are spaced apart along the length direction of the box body; Each of the second side beams connects the two first side beams; each of the first side beams includes the beam body and the reinforcement portion.

8. The box according to claim 7, characterized in that: The reinforcement portion includes a plurality of convex portions spaced apart along the length direction. In the length direction, the minimum width of the gap between two adjacent protrusions is L1, the maximum size of the box is L2, and L1 and L2 satisfy: 0.0002≤L1 / L2≤0.

5.

9. The box according to claim 8, characterized in that: 0.001<L1 / L2≤0.

3.

10. A battery, characterized in that: include: The box according to any one of claims 1 to 9; as well as The battery cell is accommodated in the accommodation space.

11. The battery according to claim 10, characterized in that It also includes a heat management component accommodated in the accommodation space, and the avoidance structure is used to avoid at least part of the heat management component.

12. The battery according to claim 11, characterized in that The thermal management component includes a plurality of heat exchange plates arranged at intervals, and battery cells are arranged between adjacent heat exchange plates; The reinforcement portion includes a plurality of convex portions arranged at intervals, and the avoidance structure includes a gap between two adjacent convex portions, wherein the gap is used to accommodate the end portion of the heat exchange plate.

13. The battery according to claim 12, characterized in that The heat management component includes a manifold, which connects the plurality of heat exchange plates; The convex portion includes a first plate body and a second plate body connected to each other, the first plate body is located on a side of the second plate body away from the base plate, and the first plate body intersects with the second plate body; The avoidance structure includes a avoidance space located on a side of the first plate body facing away from the base plate, and the manifold is at least partially located in the avoidance space.

14. An electrical device, characterized in that: The battery according to any one of claims 10 to 13 is used to provide electrical energy.

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