Battery lower box body, battery box body, battery and electric equipment

Abstract

The invention relates to a battery lower box body, a battery box body, a battery and electric equipment, and the battery lower box body comprises a bearing assembly (1) which is provided with an accommodating area (10) used for supporting a battery monomer (2), and the accommodating area (10) is closed and continuous; the liquid cooling assembly (3) is connected with the bearing assembly (1) and located on the side, away from the containing area (10), of the bearing assembly (1), and the liquid cooling assembly (3) is separated from the containing area (10) through the bearing assembly (1).

Description

Technical Field

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

[0002] Secondary batteries, especially lithium-ion batteries, have advantages such as high voltage, high energy density, long cycle life, being environmentally friendly and pollution-free, having a wide operating temperature range, and low self-discharge. They are widely used in portable electronic devices and power equipment for large new energy electric vehicles. For batteries, there is a need to further improve the sealing performance of the casing used to house the individual battery cells. Summary of the Invention

[0003] In view of this, the present disclosure provides a lower battery housing, a battery housing, a battery, and an electrical device, which helps to improve sealing.

[0004] In one aspect of this disclosure, a lower battery housing is provided, comprising:

[0005] The support assembly has a receiving area for supporting individual battery cells, and the receiving area is closed and continuous;

[0006] The liquid cooling component is connected to the carrier component and is located on the side of the carrier component away from the housing area. The liquid cooling component is separated from the housing area by the carrier component.

[0007] In this embodiment, by placing the liquid cooling component on the side of the carrier component away from the housing area, the flow and exchange of coolant and the installation of the liquid cooling component are separated from the housing area where the battery cell is located. The housing area does not need to have openings or be connected to the outside. It only needs to be sealed with the box cover on all four sides to keep the battery cell in a closed and continuous housing space. By avoiding the connection and sealing between the liquid cooling component and the carrier component at the housing area, the possibility of external substances entering the battery box through the connection between the liquid cooling component and the carrier component and damaging the battery cell can be reduced, thereby effectively improving the sealing performance and reliability of the battery.

[0008] In some embodiments, the carrier component includes:

[0009] The support member has a recess as a receiving area, and the recess has a bottom surface for supporting the battery cell.

[0010] In this embodiment, the accommodating area is located within the recess, which can more stably and reliably accommodate the battery cells and also helps to reduce the overall height of the battery box, allowing the battery box to achieve a smaller thickness.

[0011] In some embodiments, the surface of the recess away from the receiving area is welded to the liquid cooling assembly.

[0012] In this embodiment, the surface of the recess away from the receiving area can be connected to the liquid cooling component by welding, including but not limited to integral brazing. The welding time is short and the welding quality is high. It does not require the use of thermally conductive adhesive, which can maximize the heat conduction effect. In addition, during the overall heating and uniform cooling welding process, it can reduce welding deformation caused by local thermal stress. The liquid cooling component does not need to contact the receiving area, which helps to achieve good sealing and connection.

[0013] In some embodiments, the carrier further has an edge portion surrounding the outer periphery of the recess;

[0014] The supporting components also include:

[0015] The frame is located on the side of the support member away from the receiving area and is connected to the edge of the support member.

[0016] In this embodiment, the support member may include an edge portion surrounding the outer periphery of the recess. The frame provides support for the battery cell, the support member, and the liquid cooling assembly by connecting with the edge portion. The edge portion facilitates the connection between the cover and the lower battery housing, reduces openings in the housing area, and thus ensures the battery's sealing within the housing area.

[0017] In some embodiments, the liquid cooling assembly includes:

[0018] The liquid cooling pipe includes two straight segments spaced apart in parallel and a bend connecting the two straight segments. The liquid cooling pipe is connected to the surface of the recess away from the receiving area.

[0019] In this embodiment, the liquid cooling pipe adopts the form of two straight segments and a bend connecting the two straight segments, which can make the liquid cooling pipe lighter, help reduce refrigeration costs, and optimize the water cooling effect.

[0020] In some embodiments, there are multiple liquid cooling pipes, which are arranged at intervals along a first direction, and the straight sections of the liquid cooling pipes extend along a second direction perpendicular to the first direction.

[0021] In this embodiment, the straight segment can be set to extend along the second direction, and multiple liquid cooling pipes can be set at intervals along the first direction, which helps to increase the coverage area of ​​the liquid cooling pipes and improve the cooling effect on the battery cells.

[0022] In some embodiments, the recessed portion extends along a first direction and a second direction, respectively;

[0023] The area containing multiple liquid cooling pipes at least partially covers the surface of the recess on the side away from the receiving area.

[0024] In this embodiment, the laying area of ​​the liquid cooling pipe is set to match the area of ​​the recess, which can increase the overlap area between the coolant flow path in the liquid cooling pipe and the battery cell, so as to enhance the water cooling effect on the battery cell.

[0025] In some embodiments, the framework includes:

[0026] Two first side beams parallel to the first direction and two second side beams perpendicular to the first direction, with the two second side beams respectively connected between the two first side beams;

[0027] The first and second side beams are riveted to the edge portion respectively.

[0028] In this embodiment, the frame is formed by the first side beam and the second side beam and connected to the edge, which can provide reliable support for the liquid cooling components, the carrier and the battery cells while reducing the weight and processing cost of the frame.

[0029] In some embodiments, the framework further includes:

[0030] A reinforcing beam is spanned between the two second side beams along a first direction, and at least a portion of the reinforcing beam is connected to the surface of the recess on the side away from the receiving area.

[0031] In this embodiment, to further improve the support strength and structural reliability of the frame, a reinforcing beam can be installed between the two second side beams. Multiple reinforcing beams can be installed and spaced apart along the second direction.

[0032] In some embodiments, the reinforcing beam is connected to the surface of the recess on the side away from the receiving area by a self-piercing riveting structure.

[0033] In this embodiment, the self-piercing riveting structure connects the reinforcing beam and the recess, which not only enhances the reliability of the connection between the frame and the load-bearing component, but also prevents foreign objects from entering the receiving area from the connection hole and weld. Under the premise of ensuring sealing, the connection between the load-bearing component and the frame is strengthened.

[0034] In some embodiments, the reinforcing beam has a first clearance portion recessed toward the side away from the liquid cooling pipe.

[0035] In this embodiment, by providing a first clearance part on the reinforcing beam, the reinforcing beam and the liquid cooling pipe can be better fitted and connected, improving the tightness and reliability of the connection, and also helping to reduce the thickness of the battery lower casing.

[0036] In some embodiments, the liquid cooling assembly further includes:

[0037] The manifold extends along the first direction, is connected to the liquid cooling pipe, and is connected to one of the first side beams;

[0038] The inlet and outlet ports are located on the side of the manifold away from the liquid cooling pipe. The inlet and outlet ports are connected to the manifold and are configured to receive or discharge coolant.

[0039] In this embodiment, the inlet and outlet ports are located on the side of the manifold away from the liquid cooling pipe, separated from the housing area. The area where the battery cell is located does not need to be connected and exchanged with the outside, reducing the risk of battery box seal failure.

[0040] In some embodiments, the first side beam connected to the manifold has a second clearance portion recessed toward the side away from the inlet / outlet.

[0041] In this embodiment, by setting a second clearance part, the inlet and outlet can be supported, the strength near the inlet and outlet can be guaranteed, and interference between the inlet and outlet and the frame can be avoided, which can further reduce the thickness of the battery box.

[0042] In some embodiments, the lower battery housing further includes:

[0043] The module beam, located within the housing area, is used for module connection with the battery cells.

[0044] In this embodiment, the lower battery housing may also include module beams and electrical supports, which facilitates the installation of individual battery cells and the connection of circuits.

[0045] In another aspect of this disclosure, a battery housing is provided, comprising:

[0046] Battery lower casing as described in any of the above embodiments;

[0047] The cover connects to the supporting components of the lower battery compartment to form a space for housing individual batteries.

[0048] In this embodiment, the cover and the recess of the supporting component together form a receiving space that encloses the battery cell. There are no connection holes or welds between this receiving space and the liquid cooling component, thus ensuring a sealing effect.

[0049] In another aspect of this disclosure, a battery is provided, comprising:

[0050] Battery cells; and

[0051] The battery housing described above is configured to house individual battery cells.

[0052] In this embodiment, the battery cell is placed in a closed and continuous containment space formed by the recess of the cover and the supporting component, which has good sealing performance. The risk of external substances entering the containment space is low, which can reduce the adverse effects of external substances such as moisture and dust on the battery cell, making the battery less prone to failure and improving the reliability of the battery.

[0053] In another aspect of this disclosure, an electrical appliance is provided, comprising:

[0054] The battery described above is configured to provide electrical energy.

[0055] In this embodiment, the electrical equipment includes a battery cell with good sealing properties, which prevents external substances from entering the battery box as much as possible, thus helping to improve the safety and reliability of the electrical equipment. Attached Figure Description

[0056] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0057] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0058] Figure 1 These are schematic diagrams of the structure of some embodiments of the electrical equipment according to this disclosure;

[0059] Figure 2 This is an exploded view of the structure of some embodiments of the battery according to the present disclosure;

[0060] Figure 3 These are structural schematic diagrams of some embodiments of the battery lower housing according to this disclosure;

[0061] Figure 4 This is an exploded view of the structure of some embodiments of the battery lower housing according to the present disclosure;

[0062] Figure 5 This is a top view of some embodiments of the battery lower housing according to the present disclosure;

[0063] Figure 6 yes Figure 5 A partial sectional view of section CC;

[0064] Figure 7 These are schematic diagrams of the structure of some embodiments of the support member of the lower battery housing according to this disclosure;

[0065] Figure 8 These are schematic diagrams of the structure of some embodiments of the liquid cooling component of the lower battery housing according to this disclosure;

[0066] Figure 9 These are schematic diagrams of the structure of some embodiments of the battery lower housing frame according to the present disclosure;

[0067] Figure 10 This is a structural schematic diagram of some embodiments of the battery lower housing frame and liquid cooling assembly according to the present disclosure.

[0068] In the picture:

[0069] 1. Load-bearing component; 10. Receiving area; 11. Load-bearing member; 111. Recess; 111a. Bottom surface; 112. Edge; 12. Frame; 121. First side beam; 121a. Second clearance portion; 122. Second side beam; 123. Reinforcing beam; 123a. First clearance portion; 13. First connector; 14. Second connector;

[0070] 2. Battery cells;

[0071] 3. Liquid cooling components; 31. Liquid cooling pipes; 311. Straight sections; 312. Bends; 32. Manifolds; 33. Inlet and outlet pipes;

[0072] 41. Modular beam; 42. Electrical support frame;

[0073] 5. Battery housing; 51. Lower battery housing; 52. Housing cover;

[0074] 50. Battery;

[0075] 500. Electrical equipment.

[0076] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0077] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0078] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0079] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0080] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0081] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0082] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0084] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0085] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0086] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0087] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0088] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0089] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0090] A single battery cell can be a rechargeable battery. A rechargeable battery is a battery cell that can be recharged after it has been discharged, allowing the active materials to be activated and the cell to continue to be used.

[0091] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0092] A battery cell includes an electrode assembly. The electrode assembly includes a first electrode and a second electrode with opposite polarities, and a separator disposed between the first and second electrodes. In some embodiments, the first electrode is a positive electrode and the second electrode is a negative electrode. In other embodiments, the first electrode is a negative electrode and the second electrode is a positive electrode. During the charging and discharging process of the battery cell, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, disposed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0093] In some embodiments, the positive electrode may include a positive current collector substrate and a positive active material layer disposed on at least one surface of the positive current collector substrate.

[0094] As an example, the positive current collector substrate has two surfaces opposite each other in its own thickness direction, and the positive active material layer is disposed on either or both of the two opposite surfaces of the positive current collector substrate.

[0095] As an example, the positive electrode current collector substrate can be a metal foil or a composite current collector. For example, as a metal foil, silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc., can be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by applying a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) onto a polymer material base material (such as a polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc. base material).

[0096] As an example, the positive electrode active material layer may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this disclosure is not limited to these materials, and other conventional materials that can be used as positive electrode active material layers in batteries may also be used. These positive electrode active material layers may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3Mn 1 / 3 O2 (also known as NCM)333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.85 Co 0.15 Al 0.05 At least one of O2 and its modified compounds.

[0097] In some implementations, the negative electrode may include a negative current collector substrate.

[0098] As an example, the negative electrode current collector substrate can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by applying a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) onto a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0099] In some embodiments, the negative electrode sheet may include a negative electrode current collector substrate and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector substrate.

[0100] As an example, the negative electrode current collector substrate has two surfaces opposite each other in its own thickness direction, and the negative electrode active material layer is disposed on either or both of the two opposite surfaces of the negative electrode current collector substrate.

[0101] As an example, the negative electrode active material layer may employ a type of negative electrode active material layer known in the art for use in battery cells. As an example, the negative electrode active material layer may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this disclosure is not limited to these materials, and other conventional materials that can be used as negative electrode active material layers in batteries may also be used. These negative electrode active material layers may be used alone or in combination of two or more.

[0102] In some embodiments, the positive electrode current collector substrate can be made of aluminum, and the negative electrode current collector substrate can be made of copper.

[0103] In some embodiments, the separator is a separator membrane. This disclosure does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0104] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component located between the positive and negative electrode plates, or it can be located between the positive and negative electrode plates while being attached to the surface of the positive electrode plate and / or the surface of the negative electrode plate.

[0105] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrode plates, serving both to transport ions and to isolate the positive and negative electrodes.

[0106] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This disclosure does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0107] As an example, liquid electrolytes include electrolyte salts and solvents.

[0108] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0109] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0110] As an example, gel electrolytes include a polymer-based backbone network combined with an ionic liquid—a lithium salt.

[0111] As an example, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0112] As an example, polymer solid electrolytes can be polyether (polyoxyethylene), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.

[0113] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0114] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0115] In some embodiments, the electrode assembly includes a wound structure. A positive electrode, a negative electrode, and a separator are wound into the wound structure. One or more positive and negative electrodes may be provided respectively. As an example, multiple positive and multiple negative electrodes are alternately arranged along the electrode thickness direction.

[0116] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal in shape.

[0117] In some embodiments, the positive electrode includes a positive electrode tab, and the negative electrode includes a negative electrode tab. The positive and negative electrode tabs are used to conduct current from the electrode assembly. The positive and negative electrode tabs are respectively connected to the positive and negative current collector substrates. The tabs can be formed by cutting or trimming the current collector substrate, or they can be welded to the side of the current collector substrate.

[0118] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0119] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0120] The battery mentioned in the embodiments of this disclosure refers to a single physical module comprising multiple battery cells to provide higher voltage and capacity.

[0121] In some embodiments, the battery can be a battery pack, which includes a housing and a plurality of individual battery cells housed within the housing, or a battery module formed by arranging and fixing a plurality of individual battery cells housed within the housing. The battery pack may also include a battery management system and a power distribution module.

[0122] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0123] In some embodiments, the battery can be used in various battery-powered devices. These devices can be mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; and power 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. This disclosure does not impose any particular limitation on the aforementioned electrical devices.

[0124] In related technologies, battery box structures often adopt a combination of aluminum profiles and plate-type water-cooled plates. The water-cooled plate is located on top of the profile, and the profile and water-cooled plate are connected by riveting and sealed with adhesive. Poor sealing is prone to occur at the connection points, and external substances such as moisture and dust from the vehicle may enter the battery box through the gaps between the water-cooled plate and the profile, causing the battery box to fail to meet the sealing requirements.

[0125] In view of this, the present disclosure provides a lower battery housing that helps improve battery sealing.

[0126] In one aspect of this disclosure, a lower battery housing is provided, comprising:

[0127] The support assembly has a receiving area for supporting individual battery cells, and the receiving area is closed and continuous;

[0128] The liquid cooling component is connected to the carrier component and is located on the side of the carrier component away from the housing area. The liquid cooling component is separated from the housing area by the carrier component.

[0129] In this embodiment, by placing the liquid cooling component on the side of the carrier component away from the housing area, the flow and exchange of coolant and the installation of the liquid cooling component are separated from the housing area where the battery cell is located. The housing area does not need to have openings or be connected to the outside. It only needs to be sealed with the box cover on all four sides to keep the battery cell in a closed and continuous housing space. By avoiding the connection and sealing between the liquid cooling component and the carrier component at the housing area, the possibility of external substances entering the battery box through the connection between the liquid cooling component and the carrier component and damaging the battery cell can be reduced, thereby effectively improving the sealing performance and reliability of the battery.

[0130] Figure 1 This is a structural schematic diagram of some embodiments of the electrical equipment disclosed herein. The electrical equipment 500 may be a mobile phone, portable device, laptop computer, electric vehicle, electric car, ship, spacecraft, electric toy, and power tool, etc. When the electrical equipment is an electric vehicle, the battery may be installed in the chassis assembly or at the front or rear of the vehicle.

[0131] Battery 50 can be used to power electrical devices. For example, it can serve as a power source for a vehicle's electrical system, providing power for starting, navigation, and operation. Beyond its operational role, battery 50 can also act as a driving power source, replacing or partially replacing fuel or natural gas to power the vehicle. Battery 50 can also be used in other electrical devices such as mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. Spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile toys such as game consoles, electric car toys, electric ship toys, and electric airplane toys; and power tools include metal cutting tools, grinding tools, assembly tools, and railway tools such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0132] Figure 2 This is an exploded structural diagram of some embodiments of the battery disclosed herein. The battery housing 5 may include a cover 52, a lower battery housing 51, and individual battery cells 2. The individual battery cells 2 are disposed within the battery housing space formed between the cover 52 and the lower battery housing 51. The individual battery cells 2 may be arranged along the length of the lower battery housing 51. Depending on the needs, one or more layers of individual battery cells 2 may also be arranged along the height of the battery housing 5. Multiple individual battery cells 2 are first connected in series, parallel, or in a mixed configuration to form a battery module. Multiple battery modules are then connected in series, parallel, or in a mixed configuration to form a whole, which is housed within the battery housing 5. In other embodiments, all individual battery cells 2 are directly connected in series, parallel, or in a mixed configuration, and then the whole consisting of all individual battery cells 2 is housed within the battery housing 5. The specific structure of the lower battery housing 51 will be described in detail later.

[0133] Figure 3 This is a structural schematic diagram of some embodiments of the battery lower housing according to the present disclosure. Figure 4 This is an exploded structural diagram of some embodiments of the battery lower housing according to the present disclosure. Figure 5 This is a top view of some embodiments of the battery lower housing according to the present disclosure. Figure 6 yes Figure 5 A partial sectional view of section CC.

[0134] refer to Figures 2-6 This disclosure provides a battery lower housing 51, including a support component 1 and a liquid cooling component 3.

[0135] The support assembly 1 has a receiving area 10 for supporting the battery cell 2. The receiving area 10 is closed and continuous. The liquid cooling assembly 3 is connected to the support assembly 1 and is located on the side of the support assembly 1 away from the receiving area 10. The liquid cooling assembly 3 is separated from the receiving area 10 by the support assembly 1.

[0136] The support assembly 1 can be combined with the cover 52 to form a complete sealed space for placing the battery cell 2. The flow and exchange of coolant and the installation of the liquid cooling assembly 3 in the area outside the housing area 10 are realized. There are no gaps or pores in the housing area 10 due to the connection with other components, which simplifies the sealing interface of the battery box 5 and reduces the risk of external substances entering the housing area 10.

[0137] In this embodiment, by placing the liquid cooling component 3 on the side of the support component 1 away from the housing area 10, the flow and exchange of coolant and the installation of the liquid cooling component 3 are separated from the housing area 10 where the battery cell 2 is located. The housing area 10 does not need to have any openings or be connected to the outside. It only needs to be sealed with the cover 52 on all four sides to keep the battery cell 2 in a closed and continuous housing space. By avoiding the connection and sealing between the liquid cooling component 3 and the support component 1 at the housing area 10, the possibility of external substances entering the battery box through the connection between the liquid cooling component and the support component and damaging the battery cell 2 can be reduced, thereby effectively improving the sealing performance and reliability of the battery.

[0138] Figure 7 These are structural schematic diagrams of some embodiments of the support member of the lower battery housing according to this disclosure, with reference to... Figures 2-7 In some embodiments, the support component 1 includes a support member 11 having a recess 111 as a receiving area 10, and the recess 111 having a bottom surface 111a for supporting the battery cell 2.

[0139] The recess 111 may be rounded. The recess 111 may include, but is not limited to, being recessed downward along the height direction of the battery cell 2. The depth of the recess 111 and the cross-sectional area of ​​the recess 111 may be adaptively set and adjusted according to the size of the battery cell 2. The bottom surface 111a of the recess 111 may be set to a size and shape that matches the bottom of the battery cell 2 in order to better support the battery cell 2.

[0140] In this embodiment, the accommodating area 10 is located in the recess 111, which can more stably and reliably accommodate the battery cell 2, and also helps to reduce the overall height of the battery box 5, so that the battery box 5 can achieve a smaller thickness.

[0141] refer to Figures 2-4 and Figure 6 In some embodiments, the surface of the recess 111 on the side away from the receiving area 10 is welded to the liquid cooling assembly 3.

[0142] In this embodiment, the surface of the recess 111 away from the receiving area 10 includes, but is not limited to, the bottom outer surface of the recess 111. The surface of the recess 111 away from the receiving area 10 can be connected to the liquid cooling component 3 by welding, including but not limited to integral brazing. The welding time is short and the welding quality is high. It does not require the use of thermally conductive adhesive, which can maximize the heat conduction effect. In the welding process of overall heating and uniform cooling, it can reduce welding deformation caused by local thermal stress. The liquid cooling component 3 does not need to contact the receiving area 10, which helps to achieve good sealing and connection.

[0143] refer to Figures 2-7 In some embodiments, the carrier 11 also has an edge portion 112 surrounding the periphery of the recess 111, and the carrier assembly 1 also includes a frame 12 disposed on the side of the carrier 11 away from the receiving area 10 and connected to the edge portion 112 of the carrier 11.

[0144] The recess 111 includes, but is not limited to, being recessed downward relative to the edge portion 111. The cross-section of the frame 12 includes, but is not limited to, being rectangular and hollow, and is matched with the size of the edge portion 111 so as to connect with the side of the edge portion 111 away from the receiving area 10.

[0145] In this embodiment, the support member 11 may include an edge portion 112 surrounding the outer periphery of the recess 111. The frame 12 provides support for the battery cell 2, the support member 11, and the liquid cooling assembly 3 by connecting with the edge portion 112. The edge portion 112 facilitates the connection between the cover 52 and the lower battery housing 51, reduces the openings in the receiving area 10, and thus ensures the battery sealing within the receiving area 10.

[0146] Figure 8 These are schematic diagrams of the structure of some embodiments of the liquid cooling component of the lower battery housing according to this disclosure, with reference to 4 and... Figure 8 In some embodiments, the liquid cooling assembly 3 includes a liquid cooling pipe 31, which includes two parallel and spaced straight segments 311 and a bent segment 312 connected between the two straight segments 311. The liquid cooling pipe 31 is connected to the surface of the recess 111 on the side away from the receiving area 10.

[0147] Two straight sections 311 and a bent section 312 form a U-shaped pipe. The straight sections 311 are transitioned by the arc of the bent section 312 to reduce flow resistance. The liquid cooling pipe 31 is not limited to being flat, which facilitates a reliable connection with the recess 111 and improves the cooling effect.

[0148] The liquid cooling pipe 31 can be manufactured by extrusion molding, which is simpler and cheaper than other manufacturing methods such as plate water cooling plates, and the liquid cooling pipe 31 can achieve a lighter weight.

[0149] In this embodiment, the liquid cooling pipe 31 adopts the form of two straight segments 311 and a bent segment 312 connecting the two straight segments 311, which can make the liquid cooling pipe 31 lighter, help reduce refrigeration costs, and optimize the water cooling effect.

[0150] refer to Figure 4 and Figure 8 , Figure 8 In the above, direction A is the first direction and direction B is the second direction. In some embodiments, there are multiple liquid cooling pipes 31, which are arranged at intervals along the first direction, and the straight segments 311 of the liquid cooling pipes 31 extend along the second direction perpendicular to the first direction.

[0151] In this embodiment, the straight segment 311 can be configured to extend along the second direction, and multiple liquid cooling pipes 31 can be arranged at intervals along the first direction. This helps to increase the coverage area of ​​the liquid cooling pipes 31 and improve the cooling effect on the battery cell 2. The number of liquid cooling pipes 31 can be adjusted according to actual operating conditions.

[0152] refer to Figure 4 and Figure 8 In some embodiments, the recess 111 extends along a first direction and a second direction, respectively, and the area where the plurality of liquid cooling pipes 31 are located at least partially covers the surface of the recess 111 on the side away from the receiving area 10.

[0153] In this embodiment, the laying area of ​​the liquid cooling pipe 31 is set to match the area of ​​the recess 111, which can increase the overlap area between the coolant flow path in the liquid cooling pipe 31 and the battery cell 2, so as to enhance the water cooling effect on the battery cell 2.

[0154] Figure 9 These are schematic diagrams illustrating the structure of some embodiments of the battery lower housing frame according to this disclosure. Figure 10 These are structural schematic diagrams of some embodiments of the battery lower housing frame and liquid cooling assembly according to this disclosure. Figure 9 In the diagram, direction A is the first direction, and direction B is the second direction. (Refer to...) Figure 9 and Figure 10 In some embodiments, the frame 12 includes two first side beams 121 parallel to the first direction and two second side beams 122 perpendicular to the first direction. The two second side beams 122 are respectively connected between the two first side beams 121. The first side beams 121 and the second side beams 122 are respectively riveted to the edge portion 112 by the first connector 13.

[0155] The first side beam 121 and the second side beam 122 are, but are not limited to, roll-formed parts, and the first connecting part 13 is, but is not limited to, rivets. The frame 12 is, but is not limited to, a steel frame welded from roll-formed beams and stamped reinforcing parts, which reduces manufacturing difficulty and cost.

[0156] In this embodiment, the frame 12 is formed by the first side beam 121 and the second side beam 122 and connected to the edge portion 112. This can provide reliable support for the liquid cooling assembly 3, the carrier 11 and the battery cell 2 while reducing the weight and processing cost of the frame 12.

[0157] refer to Figure 4 , Figure 9 and Figure 10 In some embodiments, the frame 12 further includes a reinforcing beam 123 spanning between the two second side beams 122 along a first direction, and at least a portion of the reinforcing beam 123 is connected to the surface of the recess 111 on the side away from the receiving area 10.

[0158] In this embodiment, to further improve the support strength and structural reliability of the frame 12, a reinforcing beam 123 can be installed between the two second side beams 122. Multiple reinforcing beams 123 can be installed and spaced apart along the second direction.

[0159] refer to Figure 4 In some embodiments, the reinforcing beam 123 is connected to the surface of the recess 111 on the side away from the receiving area 10 by a self-piercing riveting structure of the second connector 14.

[0160] The riveting area can be set at the bottom surface 111a of the recess 111 near the middle. The second connector 14 includes, but is not limited to, self-piercing rivets. The number of self-piercing riveting groups can match the number of reinforcing beams 123.

[0161] The self-piercing riveting connection method eliminates the need to pre-drill holes at the bottom surface 111a of the recess 111 that supports the battery cell 2, and the connection will not produce a weld seam. The riveting process is not affected by heat sources, thus avoiding the occurrence of heat-affected zones and thermal deformation in the recess 111.

[0162] In this embodiment, the reinforcing beam 123 and the recess 111 are connected by a self-piercing riveting structure, which not only enhances the connection reliability between the frame 12 and the bearing member 11, but also prevents foreign objects from entering the receiving area 10 from the connection hole and weld. Under the premise of ensuring sealing, the connection between the bearing member 11 and the frame 11 is strengthened.

[0163] refer to Figure 8 and Figure 9 In some embodiments, the reinforcing beam 123 is provided with a first clearance portion 123a that is recessed to the side away from the liquid cooling pipe 31.

[0164] The first clearance part 123a can be configured to match the pipe diameter and pipe height of the liquid cooling pipe 31 to avoid interference between the liquid cooling pipe 31 and the reinforcing beam 123.

[0165] In this embodiment, by providing a first clearance portion 123a on the reinforcing beam 123, the reinforcing beam 123 and the liquid cooling pipe 31 can be better fitted and connected, improving the tightness and reliability of the connection, and also helping to reduce the thickness of the lower battery housing 51.

[0166] refer to Figure 8 and Figure 9 In some embodiments, the liquid cooling assembly 3 further includes a manifold 32 and an inlet / outlet port 33. The manifold 32 extends along a first direction, communicates with the liquid cooling pipe 31, and is connected to one of the first side beams 121. The inlet / outlet port 33 is located on the side of the manifold 32 away from the liquid cooling pipe 31, communicates with the manifold 32, and is configured to receive or discharge coolant.

[0167] Multiple liquid cooling pipes 31 are spaced apart along the extension direction of the manifold 32, and the inlet and outlet pipes 33 facilitate the exchange of liquid in the liquid cooling pipes 31 with the outside.

[0168] In this embodiment, the inlet and outlet ports 33 are located on the side of the manifold 32 away from the liquid cooling pipe 31, separated from the housing area 10. The area where the battery cell 2 is located does not need to be connected and exchanged with the outside, reducing the risk of battery box 5 sealing failure.

[0169] refer to Figure 4 and Figure 9 In some embodiments, the first side beam 121 connected to the manifold 32 has a second clearance portion 121a recessed toward the side away from the inlet / outlet port 33.

[0170] In this embodiment, by providing a second clearance portion 121a, the inlet / outlet port 33 can be supported, ensuring the strength near the inlet / outlet port 33 and preventing interference between the inlet / outlet port 33 and the frame 12, thereby further reducing the thickness of the battery box 5. The size of the second clearance portion 121a can be adjusted according to the diameter of the inlet / outlet port 33, etc.

[0171] refer to Figure 4 In some embodiments, the lower battery housing also includes a module beam 41, which is disposed within the receiving area 10 for module connection with the battery cell 2.

[0172] The lower battery housing may also include an electrical support 42, which is disposed at the edge 112. Two sets of module beams 41 may be disposed along the second direction.

[0173] In this embodiment, the lower battery housing may also include a module beam 41 and an electrical support 42, etc., to facilitate the installation of the battery cells 2 and the connection of the circuit. The electrical support 42 includes, but is not limited to, being welded to the edge portion 112.

[0174] In another aspect of the embodiments of this disclosure, a battery housing is provided, including a lower battery housing 51 as described above and a cover 52, wherein the cover 52 is connected to the support assembly 1 of the lower battery housing so as to form a battery cell housing space with the housing area 10.

[0175] In this embodiment, the cover 52 and the recess 111 of the support component 1 together form a receiving space that encloses the battery cell 2. There are no connecting holes or welds between this receiving space and the liquid cooling component 3, and it is separated from the liquid cooling component 3 to ensure a sealing effect.

[0176] In another aspect of this disclosure, a battery is provided, comprising a battery cell 2 and a battery housing 5 as described above, the battery housing 5 being configured to house the battery cell 2.

[0177] In this embodiment, the battery cell 2 is placed in a closed and continuous containment space formed by the box cover 52 and the recess 111 of the support component 1. It has good sealing performance, and the risk of external substances entering the containment space is low. It can reduce the adverse effects of external substances such as water vapor and dust on the battery cell 2, and the battery 50 is not easy to fail, which can improve the reliability of the battery 50.

[0178] In another aspect of this disclosure, an electrical device is provided, including a battery 50 as described above, the battery 50 being used to provide electrical energy.

[0179] In this embodiment, the electrical equipment includes a battery cell 2 with good sealing properties, which prevents external substances from entering the battery box as much as possible, thus helping to improve the safety and reliability of the electrical equipment.

[0180] refer to Figure 3 and Figure 4 The lower battery housing 51 includes a support component 11, a liquid cooling pipe 31, a frame 12, a manifold 32, and an inlet / outlet pipe 33.

[0181] The support member 11 has a recess 111 that serves as a receiving area 10, and the recess 111 has a bottom surface 111a for supporting the battery cell 2. The frame 12 is disposed on the side of the support member 11 away from the receiving area 10 and is connected to the edge portion 112 of the support member 11.

[0182] The frame 12 includes two first side beams 121 parallel to the first direction and two second side beams 122 perpendicular to the first direction. The two second side beams 122 are respectively connected between the two first side beams 121. The first side beams 121 and the second side beams 122 are respectively riveted to the edge portion 112 by a first connector 13. The frame 12 also includes a reinforcing beam 123, which spans between the two second side beams 122 along the first direction. At least a portion of the reinforcing beam 123 is connected to the surface of the recess 111 on the side away from the receiving area 10.

[0183] A liquid cooling pipe 31 is disposed between the support member 11 and the frame 12, including two parallel and spaced straight segments 311 and a bent segment 312 connecting the two straight segments 311. The liquid cooling pipe 31 is welded to the surface of the recess 111 away from the receiving area 10. The liquid cooling assembly 3 also includes a manifold 32 and inlet / outlet ports 33. The manifold 32 extends along a first direction, communicates with the liquid cooling pipe 31, and is connected to one of the first side beams 121. The inlet / outlet ports 33 are disposed on the side of the manifold 32 away from the liquid cooling pipe 31, communicate with the manifold 32, and are configured to receive or discharge coolant. The first side beam 121 connected to the manifold 32 has a second clearance portion 121a recessed towards the side away from the inlet / outlet ports 33.

[0184] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0185] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A battery lower casing, characterized in that, include: The support assembly (1) has a receiving area (10) for supporting the battery cell (2), the receiving area (10) being closed and continuous; The liquid cooling component (3) is connected to the support component (1) and is located on the side of the support component (1) away from the receiving area (10). The liquid cooling component (3) is separated from the receiving area (10) by the support component (1).

2. The battery lower casing as described in claim 1, characterized in that, The carrier component (1) includes: The support member (11) has a recess (111) as the receiving area (10), the recess (111) having a bottom surface (111a) for supporting the battery cell (2).

3. The battery lower housing as described in claim 2, characterized in that, The surface of the recess (111) on the side away from the receiving area (10) is welded to the liquid cooling assembly (3).

4. The battery lower housing as described in claim 3, characterized in that, The support member (11) also has an edge portion (112) surrounding the outer periphery of the recess (111); The carrier component (1) further includes: A frame (12) is disposed on the side of the support member (11) away from the receiving area (10) and is connected to the edge portion (112) of the support member (11).

5. The lower battery housing as described in claim 3 or 4, characterized in that, The liquid cooling assembly (3) includes: The liquid cooling pipe (31) includes two straight segments (311) arranged in parallel intervals and a bent segment (312) connected between the two straight segments (311). The liquid cooling pipe (31) is connected to the surface of the recess (111) away from the receiving area (10).

6. The lower battery housing as described in claim 5, characterized in that, The number of liquid cooling pipes (31) is multiple, and the multiple liquid cooling pipes (31) are arranged at intervals along the first direction; The straight section (311) of the liquid cooling pipe (31) extends along a second direction perpendicular to the first direction.

7. The lower battery housing as described in claim 6, characterized in that, The recess (111) extends along the first direction and the second direction, respectively; The area where the plurality of liquid cooling pipes (31) are located at least partially covers the surface of the recess (111) on the side away from the receiving area (10).

8. The battery lower casing as described in any one of claims 5 to 7, characterized in that, The framework (12) includes: Two first side beams (121) parallel to the first direction and two second side beams (122) perpendicular to the first direction, the two second side beams (122) being connected between the two first side beams (121); The first side beam (121) and the second side beam (122) are riveted to the edge portion (112).

9. The lower battery housing as described in claim 8, characterized in that, The framework (12) also includes: A reinforcing beam (123) is provided across the two second side beams (122) along the first direction, and at least a portion of the reinforcing beam (123) is connected to the surface of the recess (111) on the side away from the receiving area (10).

10. The lower battery housing as described in claim 9, characterized in that, The reinforcing beam (123) and the surface of the recess (111) on the side away from the receiving area (10) are connected by a self-piercing riveting structure.

11. The battery lower housing as described in claim 9 or 10, characterized in that, The reinforcing beam (123) is provided with a first clearance portion (123a) that is recessed to the side away from the liquid cooling pipe (31).

12. The battery lower casing as described in any one of claims 8 to 11, characterized in that, The liquid cooling assembly (3) also includes: A manifold (32) extends along the first direction, the manifold (32) is connected to the liquid cooling pipe (31), and is connected to one of the first side beams (121); The inlet / outlet port (33) is located on the side of the manifold (32) away from the liquid cooling pipe (31). The inlet / outlet port (33) is connected to the manifold (32) and is configured to receive or discharge coolant.

13. The lower battery housing as described in claim 12, characterized in that, The first side beam (121) connected to the manifold (32) has a second clearance portion (121a) recessed to the side away from the inlet / outlet (33).

14. The battery lower casing as described in any one of claims 3 to 13, characterized in that, Also includes: A module beam (41) is disposed within the receiving area (10) for module connection with the battery cell (2).

15. A battery housing, characterized in that, include: The lower battery housing (51) as described in any one of claims 1 to 14 above; The cover (52) is connected to the support assembly (1) of the lower battery housing so as to form a battery cell housing space with the housing area (10).

16. A battery, characterized in that, include: Battery cell (2); and The battery housing (5) as described in claim 15 is configured to house the battery cell (2).

17. An electrical appliance, characterized in that, include: The battery (50) as claimed in claim 16 is configured to provide electrical energy.

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