Battery device and power utilization device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries. The at least two battery monomer assemblies arranged along the first direction comprise at least two battery monomers arranged along a second direction, the second direction and the first direction are crossed, and the battery monomer assemblies are positioned in the box body; the first pressing strip of the pressing strip assembly is arranged across the battery monomers of the two adjacent battery monomer assemblies in the first direction, the first pressing strip is connected with the at least two battery monomers of the corresponding battery monomer assembly, the at least two second pressing strips are connected to the first pressing strip, and the at least two second pressing strips are arranged in the first direction. Under the condition that the width of a single second pressing strip in the first direction is not changed, the at least two second pressing strips arranged in the first direction can increase the total width restrained in the first direction, the dislocation of two adjacent battery monomer assemblies in the second direction is reduced, the overall structural rigidity and structural strength of the battery device are improved, and the service life of the battery device is prolonged. Therefore, the battery device is high in structural strength and easy to assemble.

Description

Technical Field

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

[0002] Batteries are being used more and more widely in daily life and industry. For example, new energy equipment equipped with batteries has been widely used. In addition, batteries are increasingly being used in the field of energy storage.

[0003] In related technologies, it is difficult to balance structural strength and ease of assembly in battery devices. Utility Model Content

[0004] This disclosure provides a battery device and an electrical device that enable the battery device to balance structural strength and ease of assembly.

[0005] The technical solution of this disclosure embodiment is implemented as follows:

[0006] The first aspect of this disclosure provides a battery device, comprising:

[0007] Box;

[0008] At least two battery cell assemblies are arranged along a first direction, each battery cell assembly includes at least two battery cells arranged along a second direction, the second direction being intersected with the first direction, and the battery cell assemblies are located within the housing.

[0009] A pressure strip assembly includes a first pressure strip and at least two second pressure strips. The first pressure strip spans across the battery cells of two adjacent battery cell assemblies along a first direction. The first pressure strip is connected to at least two battery cells of the corresponding battery cell assembly. At least two second pressure strips are connected to the side of the first pressure strip away from the battery cell assembly along a third direction. The third direction is arranged to intersect the first direction and the second direction respectively. At least two second pressure strips are arranged along the first direction.

[0010] In this embodiment of the present disclosure, at least two second pressure strips are arranged along the first direction. With the width of a single second pressure strip along the first direction remaining unchanged, the deformation of the second pressure strip along the first direction will not increase, which facilitates the assembly of the second pressure strip. At least two second pressure strips can increase the total width of the constraint along the first direction, thereby better constraining the battery cell assembly, reducing the expansion deformation of the battery cell assembly along the second direction, reducing the misalignment of two adjacent battery cell assemblies along the second direction, improving the overall structural rigidity and structural strength of the battery device, and enabling the battery device to balance structural strength and ease of assembly.

[0011] In some embodiments, the first pressure strip has a mounting groove, and at least two of the second pressure strips are at least partially located within the mounting groove.

[0012] In this embodiment of the present disclosure, at least two second pressure strips are at least partially located in the mounting groove. The mounting groove is used to position the second pressure strips on the first pressure strip, so as to facilitate the assembly of the second pressure strips onto the first pressure strip.

[0013] In some embodiments, the first pressure strip has limiting ribs on opposite sides along the first direction, and all second pressure strips are located between the limiting ribs along the first direction.

[0014] In this embodiment, the limiting rib can increase the structural strength of the first pressure strip, thereby better constraining the battery cell assembly and reducing the expansion and deformation of the battery cell assembly along the second direction.

[0015] In some embodiments, the limiting rib abuts against the corresponding second pressure strip along the first direction.

[0016] In this embodiment of the present disclosure, the limiting rib precisely positions the second pressure strip relative to the first pressure strip along the first direction.

[0017] In some embodiments, the first pressure strip has a reinforcing rib extending along the second direction, the reinforcing rib protruding along the third direction away from the battery cell assembly, and at least two second pressure strips are respectively located on opposite sides of the reinforcing rib along the first direction.

[0018] In this embodiment, at least two second pressure strips are located on opposite sides of the reinforcing rib along the first direction, so that the second pressure strips on opposite sides of the pressure strip assembly along the first direction are closer to the position of large deformation in the middle of the battery cell, so that the second pressure strips can better constrain the deformation of the battery cell assembly and improve the expansion performance of the battery device.

[0019] In some embodiments, at least one of the reinforcing ribs spans across two adjacent battery cell assemblies along the first direction.

[0020] In this embodiment of the present disclosure, at least one reinforcing rib is provided across two adjacent battery cell assemblies along a first direction, and at least one reinforcing rib is provided at a position where the first pressure bar is more likely to be damaged and cracked, thereby reducing the risk of failure of the first pressure bar.

[0021] In some embodiments, the reinforcing ribs abut against two adjacent second pressure strips on opposite sides along the first direction.

[0022] In this embodiment, the reinforcing rib can limit the second pressure strip along the first direction, reduce the movement of the second pressure strip relative to the first pressure strip, and facilitate the first and second pressure strips to bear the force as a whole, thereby improving the structural rigidity of the pressure strip assembly.

[0023] In some embodiments, the pressure strip assembly includes at least three second pressure strips, one of which is a preset pressure strip. The preset pressure strip spans across the battery cells of two adjacent battery cell assemblies along the first direction, and the preset pressure strip has second pressure strips respectively disposed on opposite sides of each other along the first direction.

[0024] In this embodiment of the present disclosure, a preset pressure strip is provided across two adjacent battery cells in a first direction. The preset pressure strip is located at a position where the first pressure strip is more likely to be damaged and cracked. The preset pressure strip assists the first pressure strip in bearing force, reduces the damage and failure of the first pressure strip, and increases the structural rigidity of the battery cell assembly.

[0025] In some embodiments, at least two second pressure strips on each of the first pressure strips are arranged at intervals along the first direction.

[0026] In this embodiment of the present disclosure, at least two second pressure strips on each first pressure strip are arranged at intervals along a first direction. When the pressure strip assembly meets the expansion requirements of the battery cell assembly, the amount of material used in the second pressure strips on the pressure strip assembly can be reduced, thereby reducing the weight of the battery device.

[0027] In some embodiments, the exterior of the second pressure strip has an insulating layer.

[0028] In this embodiment, the second pressure strip has an insulating layer on its exterior, and the second pressure strip is insulated from the battery cell, reducing creepage.

[0029] In some embodiments, the first pressure strip is bonded to the second pressure strip.

[0030] In this embodiment of the present disclosure, the first pressure strip and the second pressure strip are bonded together, so that the first pressure strip and the second pressure strip are subjected to force as a whole, thereby increasing the structural integrity of the pressure strip assembly and improving the structural rigidity of the pressure strip assembly.

[0031] In some embodiments, the electrode terminals of the battery cells are arranged along the first direction, and the pressure strip assembly is located between the electrode terminals of two adjacent battery cells along the first direction.

[0032] In this embodiment of the present disclosure, the pressure strip assembly is located between the electrode terminals of two adjacent battery cells along a first direction, thereby reducing the space occupied by the pressure strip assembly between the electrode terminals of the same battery cell.

[0033] In some embodiments, the two ends of the second pressure strip along the second direction are respectively connected to the housing.

[0034] In this embodiment of the present disclosure, the two ends of the second pressure strip along the second direction are respectively connected to the housing, thereby reducing the movement of the battery cell assembly relative to the housing and improving the structural rigidity and structural strength of the battery device.

[0035] In some embodiments, the material of the first pressure strip is an insulating material.

[0036] In this embodiment, the first pressure strip is made of insulating material. The insulation of the first pressure strip helps to insulate the second pressure strip from the battery cell.

[0037] In some embodiments, the material of the second pressure strip is a metal material.

[0038] In this embodiment, the second pressure strip is made of metal, and has good strength properties, which is beneficial for the second pressure strip to constrain the battery cell.

[0039] A second aspect of this disclosure provides an electrical device, including the battery device described above.

[0040] In this embodiment of the present disclosure, at least two second pressure strips are arranged along the first direction. With the width of a single second pressure strip along the first direction remaining unchanged, the deformation of the second pressure strip along the first direction will not increase, which facilitates the assembly of the second pressure strip. At least two second pressure strips can increase the total width of the constraint along the first direction, thereby better constraining the battery cell assembly, reducing the expansion deformation of the battery cell assembly along the second direction, reducing the misalignment of two adjacent battery cell assemblies along the second direction, improving the overall structural rigidity and structural strength of the battery device, and enabling the battery device to balance structural strength and ease of assembly. Attached Figure Description

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0042] Figure 1 This is a schematic diagram of the structure of the battery device provided in the embodiments of this disclosure;

[0043] Figure 2 This is a schematic diagram of the structure of the pressure strip assembly provided in the embodiments of this disclosure. The figure shows that the pressure strip assembly is provided with two second pressure strips, and the figure also shows the case where the pressure strip assembly is provided with reinforcing ribs.

[0044] Figure 3 yes Figure 2 Sectional view at point AA;

[0045] Figure 4This is a schematic diagram of the structure of the pressure strip assembly provided in the embodiments of this disclosure. The diagram shows the case where the pressure strip assembly is provided with two second pressure strips, and the diagram also shows the case where the pressure strip assembly is not provided with reinforcing ribs.

[0046] Figure 5 yes Figure 4 Sectional view at point BB;

[0047] Figure 6 This is a schematic diagram of the structure of the pressure strip assembly provided in the embodiments of this disclosure. The figure shows that the pressure strip assembly is provided with three second pressure strips and that the pressure strip assembly is provided with reinforcing ribs.

[0048] Figure 7 yes Figure 6 Sectional view at CC;

[0049] Figure 8 This is a schematic diagram of the structure of the pressure strip assembly provided in the embodiments of this disclosure. The diagram shows the case where the pressure strip assembly is provided with three second pressure strips, and the diagram also shows the case where the pressure strip assembly is not provided with reinforcing ribs.

[0050] Figure 9 yes Figure 8 Sectional view at point DD;

[0051] Figure 10 This is an exploded schematic diagram of the battery device provided in the embodiments of this disclosure;

[0052] Figure 11 This is a schematic diagram of the structure of the electrical device provided in the embodiments of this disclosure.

[0053] Explanation of reference numerals in the attached figures

[0054] 1. Housing; 11. First housing; 12. Second housing; 2. Pressure strip assembly; 21. First pressure strip; 211. Mounting groove; 212. Limiting rib; 213. Reinforcing rib; 22. Second pressure strip; 221. Preset pressure strip; 222. Insulation layer; 3. Battery cell assembly; 31. Battery cell; 311. Electrode terminal; 312. Explosion-proof valve; R1. First direction; R2. Second direction; R3. Third direction; 1000. Vehicle; 100. Battery device; 200. Controller; 300. Motor. Detailed Implementation

[0055] The embodiments of the technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solutions of the embodiments of this disclosure, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0056] 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 embodiments of this disclosure belong; 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 this disclosure are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" 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 or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "multiple" means two or more, unless otherwise explicitly defined. "Two or more" here includes the case of two.

[0058] 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 disclosure. 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.

[0059] In the description of the embodiments of this disclosure, 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, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0060] In the description of the embodiments of this disclosure, 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0061] In related technologies, a battery device includes at least two battery cell assemblies and a retaining strip assembly. The at least two battery cell assemblies are arranged along a first direction, and each battery cell assembly includes at least two battery cells arranged along a second direction, which intersects with the first direction. The retaining strip assembly includes a first retaining strip and a second retaining strip. The first retaining strip spans across the battery cells of two adjacent battery cell assemblies along the first direction and is connected to at least two battery cells of the corresponding battery cell assembly. The second retaining strip is connected to the first retaining strip. The retaining strip assembly is used to constrain the deformation and displacement of the battery cell assembly along the second direction. When the width of the battery cell along the first direction is relatively wide, the expansion deformation of the battery cell along the second direction is relatively large, and the required constraint force of the battery cell assembly is relatively large. When the number of battery cell assemblies along the first direction of the battery device is small, the number of retaining strip assemblies is small. Under vibration and impact, the two adjacent battery cell assemblies along the first direction are more likely to move and deform relative to each other, increasing the overall structural stiffness and structural strength requirements of the battery device. Increasing the width of the second retaining strip along the first direction to meet the structural strength requirements of the battery device would increase the production cost of the second retaining strip and also increase the deformation of the second retaining strip along the second direction, leading to difficulties in assembling the second retaining strip. If the width of the second pressure strip along the first direction remains unchanged to make the second pressure strip easy to assemble, the second pressure strip will be difficult to meet the constraint force requirements of the battery cell module, as well as the structural strength and rigidity requirements of the battery device. The battery device will be difficult to balance structural strength and ease of assembly.

[0062] The battery device 100 of this disclosure includes a pressure strip assembly 2 comprising a first pressure strip 21 and at least two second pressure strips 22 arranged along a first direction R1. The first pressure strip 21 spans the battery cells 31 of two adjacent battery cell assemblies 3 along the first direction R1. The at least two second pressure strips 22 are connected to the side of the first pressure strip 21 away from the battery cell assembly 3 along a third direction R3. When the width of a single second pressure strip 22 along the first direction R1 remains unchanged, the deformation of the second pressure strip 22 along the first direction R1 will not increase, which facilitates the assembly of the second pressure strip 22. The at least two second pressure strips 22 can increase the total width of the constraint along the first direction R1, thereby better constraining the battery cell assembly 3, reducing the misalignment of two adjacent battery cell assemblies 3 along the second direction R2, improving the overall structural rigidity and structural strength of the battery device 100, and enabling the battery device 100 to balance structural strength and ease of assembly.

[0063] This disclosure provides an electrical device including a battery device 100, which is used to store or provide electrical energy.

[0064] In some embodiments, please refer to Figure 11 The electrical device also includes a main body, and a battery device 100 is installed on the main body to supply power to the main body.

[0065] Electrical devices are devices that use electrical energy as their energy source to perform corresponding functions by consuming electrical energy. For example, electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0066] The main body of a device refers to the main structure that consumes electrical energy to perform its corresponding functions. For example, an electrical device can be a mobile phone, where the main body is the part that enables communication and other functions, powered by individual battery cells or battery packs. Similarly, an electrical device can be a car, where the main body is the part that provides seating and allows the vehicle to move on the road, powered by individual battery cells or battery packs.

[0067] The following description will be based on an example of an electrical device, namely a vehicle 1000, according to an embodiment of this disclosure.

[0068] The vehicle 1000 provided in this embodiment can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Please refer to... Figure 1 The vehicle 1000 has a battery device 100 installed inside, which can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the vehicle 1000's operating power source. The vehicle 1000 may also include a controller 200 and a motor 300, whereby the controller 200 can control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can meet the power needs of the vehicle 1000 during startup, navigation, and operation.

[0069] In this embodiment of the disclosure, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0070] In some embodiments, the battery device 100 may be a battery pack.

[0071] In some embodiments, the battery device 100 may be an energy storage device.

[0072] The battery device 100 of this disclosure includes a battery cell assembly, which includes battery cells. The battery cells are used to store or provide electrical energy.

[0073] The battery device 100 corresponds to one or at least two battery cell assemblies, which are used to provide voltage and capacity. A battery cell assembly may include at least two battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0074] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0075] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0076] In this embodiment of the disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0077] 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 this disclosure does not limit it.

[0078] A single battery cell includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. 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. In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0079] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0080] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0081] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, the embodiments of this disclosure are not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may 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 oxide may 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) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0082] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0083] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0084] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0085] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0086] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material 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, the embodiments of this disclosure are not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0087] In some embodiments, the negative electrode can be made of foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or a foamed alloy, etc. When foamed metal is used as the negative electrode, the surface of the foamed metal may or may not contain a negative electrode active material.

[0088] In some embodiments, the negative electrode may be made of foamed carbon.

[0089] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0090] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0091] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0092] 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.

[0093] 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 single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0094] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0095] 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.

[0096] Liquid electrolytes include electrolyte salts and solvents.

[0097] 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.

[0098] 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.

[0099] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0100] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0101] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0102] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0103] 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.

[0104] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0105] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0106] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0107] In some implementations, the electrode assembly is a stacked structure.

[0108] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0109] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0110] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0111] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0112] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0113] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0114] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0115] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0116] For the battery device 100 of this disclosure embodiment, please refer to [link to relevant documentation]. Figures 1-9 The battery device 100 includes a housing 1, at least two battery cell assemblies 3, and a retaining strip assembly 2. The at least two battery cell assemblies 3 are arranged along a first direction R1, and each battery cell assembly 3 includes at least two battery cells 31 arranged along a second direction R2. The second direction R2 is intersected with the first direction R1, and the battery cell assembly 3 is located inside the housing 1. The retaining strip assembly 2 includes a first retaining strip 21 and at least two second retaining strips 22. The first retaining strip 21 is arranged along the first direction R1 across the battery cells 31 of two adjacent battery cell assemblies 3. The first retaining strip 21 is connected to at least two battery cells 31 of the corresponding battery cell assembly 3. The at least two second retaining strips 22 are connected to the side of the first retaining strip 21 away from the battery cell assembly 3 along a third direction R3. The third direction R3 is intersected with the first direction R1 and the second direction R2, respectively. The at least two second retaining strips 22 are arranged along the first direction R1.

[0117] The pressure strip assembly 2 is a structure used to fix and constrain the battery cell 31 and / or battery cell assembly 3.

[0118] For example, the battery cell assembly 3 includes at least two battery cells 31, which are connected in series, in parallel or in a mixed manner through a busbar component.

[0119] For example, the battery cell assembly 3 can be a battery module, which is formed by arranging and fixing at least two battery cells 31 to form an independent module.

[0120] For example, a battery module can be formed by bundling at least two battery cells 31 together with cable ties.

[0121] For example, the battery cell assembly 3 can also be housed in the housing 1 by directly fixing at least two battery cells 31 to the housing 1.

[0122] For example, the housing 1 can be part of the chassis structure of the vehicle 1000. For instance, a portion of the housing 1 can be at least a portion of the floor of the vehicle 1000, or a portion of the housing 1 can be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0123] For example, the battery cell 31 is a prismatic battery.

[0124] It should be noted that the connection between the first pressure strip 21 and at least two battery cells 31 of the corresponding battery cell assembly 3 means that the first pressure strip 21 is connected to at least two battery cells 31 of two adjacent battery cell assemblies 3 that are spanned by the first pressure strip 21 along the first direction R1.

[0125] For example, the first pressure strip 21 is connected to all the battery cells 31 of the corresponding battery cell assembly 3.

[0126] For example, the first pressure strip 21 is connected to two battery cells 31 of the corresponding battery cell assembly 3.

[0127] For example, the first pressure strip 21 is connected to the two outermost battery cells 31 of the corresponding battery cell assembly 3 along the second direction R2.

[0128] For example, the first pressure strip 21 is bonded to the corresponding battery cell assembly 3.

[0129] For example, the first pressure strip 21 is snapped into the battery cell assembly 3.

[0130] For example, each pair of adjacent battery cell assemblies 3 along the first direction R1 is provided with a pressure strip assembly 2.

[0131] For example, the number of pressure strip components 2 is at least one.

[0132] For example, the number of pressure strip components 2 is one, two, three, four, five, or six.

[0133] For example, the number of second pressure strips 22 is two, three, or four.

[0134] It should be noted that the intersection of the first direction R1 and the second direction R2 means that the first direction R1 and the second direction R2 are not parallel.

[0135] For example, the first direction R1 is perpendicular to the second direction R2.

[0136] For example, the first pressure strip 21 is an insulating pressure strip.

[0137] For example, the battery cell assembly 3 is connected to the housing 1.

[0138] For example, the strength of the first pressure strip 21 is greater than the strength of the blue film of the battery cell 31.

[0139] For example, the battery cell 31 is a blade battery.

[0140] In this embodiment, the pressure strip assembly 2 includes a first pressure strip 21 and at least two second pressure strips 22. The first pressure strip 21 spans across the battery cells 31 of two adjacent battery cell assemblies 3 along a first direction R1. The first pressure strip 21 is connected to at least two battery cells 31 of the corresponding battery cell assembly 3. The at least two second pressure strips 22 are connected to the side of the first pressure strip 21 away from the battery cell assembly 3 along a third direction R3, increasing the width of the first pressure strip 21 along the first direction R1. The at least two second pressure strips 22 are arranged along the first direction R1. With the width of the second pressure strip 22 along the first direction R1 remaining constant, the deformation of the second pressure strip 22 along the first direction R1 will not increase, facilitating the assembly of the second pressure strip 22. At least two second pressure strips 22 can increase the total width of the constraint along the first direction R1, thereby better constraining the battery cell assembly 3, reducing the expansion deformation of the battery cell assembly 3 along the second direction R2, reducing the misalignment of two adjacent battery cell assemblies 3 along the second direction R2, and improving the overall structural stiffness and strength of the battery device 100, enabling the battery device 100 to balance structural strength and ease of assembly. With the width of a single second pressure strip 22 along the first direction R1 remaining constant, the deformation of the second pressure strip 22 along the first direction R1 will not increase, reducing the problem of uncoupling and twisting after the second pressure strip 22 is assembled. The pressure strip assembly 2 makes two adjacent battery cell assemblies 3 into a whole, improving the overall stiffness of the battery device 100, increasing the main frequency of the battery device 100, reducing the possibility of resonance between the battery device 100 and the main body of the electrical equipment, and reducing the structural failure of the battery device 100 under vibration and impact.

[0141] In some embodiments, the material of the first pressure strip 21 is an insulating material.

[0142] For example, the material of the first pressure strip 21 is plastic.

[0143] For example, the material of the first pressure strip 21 is polypropylene plastic or epoxy resin plastic.

[0144] In this embodiment, the material of the first pressure strip 21 is an insulating material. The insulation of the first pressure strip 21 is beneficial to the insulation of the second pressure strip 22 from the battery cell 31.

[0145] In some embodiments, the second pressure strip 22 is made of metal.

[0146] For example, the material of the second pressure strip 22 is steel or aluminum alloy.

[0147] In this embodiment, the material of the second pressure strip 22 is a metal material, and the second pressure strip 22 has good strength performance, which is beneficial for the second pressure strip 22 to constrain the battery cell 31.

[0148] For example, the first direction R1 is perpendicular to the second direction R2.

[0149] For example, the first direction R1 is perpendicular to the third direction R3.

[0150] For example, the second direction R2 is perpendicular to the third direction R3.

[0151] In some embodiments, please refer to Figure 10 The housing 1 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 1 to house the battery cell assembly 3. Here, "closed" refers to covering or closing, which can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0152] In some embodiments, please refer to Figures 2-9 The first pressure strip 21 has a mounting groove 211, and at least two second pressure strips 22 are at least partially located within the mounting groove 211.

[0153] For example, at least two second pressure strips 22 are partially located inside the mounting groove 211, and at least two second pressure strips 22 are partially located outside the mounting groove 211.

[0154] For example, at least two second pressure strips 22 are all located within the mounting groove 211.

[0155] In this embodiment of the present disclosure, at least two second pressure strips 22 are at least partially located in the mounting groove 211. The mounting groove 211 is used to position the second pressure strips 22 on the first pressure strip 21, so as to facilitate the assembly of the second pressure strips 22 onto the first pressure strip 21.

[0156] It is understood that the first pressure strip 21 is not limited to having a mounting groove 211. Exemplarily, the first pressure strip 21 is flat.

[0157] In some embodiments, please refer to Figures 2-9 The first pressure strip 21 has limiting ribs 212 on both sides along the first direction R1, and all the second pressure strips 22 are located between the limiting ribs 212 along the first direction R1.

[0158] It should be noted that the second pressure strip 22 is located on one side of the limiting rib 212 along the first direction R1, and the side of the limiting rib 212 facing the second pressure strip 22 along the first direction R1 abuts against the corresponding second pressure strip 22.

[0159] For example, the limiting rib 212 protrudes along the third direction R3 away from the side of the battery cell assembly 3.

[0160] For example, the limiting rib 212 extends along the second direction R2.

[0161] For example, the limiting rib 212 protrudes from the second pressure strip 22 along the third direction R3 away from the battery cell assembly 3.

[0162] In this embodiment, the first pressure strip 21 has limiting ribs 212 on both sides along the first direction R1. The limiting ribs 212 can increase the structural strength of the first pressure strip 21, thereby better constraining the battery cell assembly 3 and reducing the expansion deformation of the battery cell assembly 3 along the second direction R2. All the second pressure strips 22 are located between the limiting ribs 212 along the first direction R1. The limiting ribs 212 can restrict the relative movement of the second pressure strips 22 and the first pressure strip 21 along the first direction R1.

[0163] It is understood that the limiting rib 212 is not limited to abutting against the corresponding second pressure strip 22 along the first direction R1. For example, the limiting rib 212 is spaced apart from the corresponding second pressure strip 22 along the first direction R1.

[0164] In some embodiments, please refer to Figures 2-9 The limiting rib 212 abuts against the corresponding second pressure strip 22 along the first direction R1.

[0165] In this embodiment of the disclosure, the limiting rib 212 abuts against the corresponding second pressure strip 22 along the first direction R1, and the limiting rib 212 precisely positions the second pressure strip 22 relative to the first pressure strip 21 along the first direction R1.

[0166] In some embodiments, please refer to Figures 1-9 The first pressure strip 21 has a reinforcing rib 213 extending along the second direction R2. The reinforcing rib 213 protrudes along the third direction R3 on the side away from the battery cell assembly 3. At least two second pressure strips 22 are located on opposite sides of the reinforcing rib 213 along the first direction R1.

[0167] In this embodiment, the first pressure strip 21 has a reinforcing rib 213 extending along the second direction R2. The reinforcing rib 213 protrudes along the third direction R3 on the side opposite to the battery cell assembly 3. The reinforcing rib 213 improves the structural strength of the first pressure strip 21 and reduces the risk of failure of the first pressure strip 21. At least two second pressure strips 22 are respectively located on opposite sides of the reinforcing rib 213 along the first direction R1, so that the second pressure strips 22 on opposite sides of the pressure strip assembly 2 along the first direction R1 are closer to the position of greater deformation in the middle of the battery cell 31, so that the second pressure strips 22 can better constrain the deformation of the battery cell assembly 3 and improve the expansion performance of the battery device 100.

[0168] It is understood that, not limited to, at least two second pressure strips 22 are located on opposite sides of the reinforcing rib 213 along the first direction R1. Exemplarily, at least two second pressure strips 22 are located on one side of the reinforcing rib 213 along the first direction R1.

[0169] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 7 At least one reinforcing rib 213 is provided across two adjacent battery cell assemblies 3 along the first direction R1.

[0170] For example, the number of reinforcing ribs 213 is one, two, or three.

[0171] In this embodiment of the present disclosure, at least one reinforcing rib 213 is provided across two adjacent battery cell assemblies 3 along the first direction R1. At least one reinforcing rib 213 is provided at a position where the first pressure strip 21 is more likely to be damaged and cracked, thereby reducing the risk of failure of the first pressure strip 21.

[0172] It is understood that at least one reinforcing rib 213 is not limited to spanning two adjacent battery cell assemblies 3 along the first direction R1. Exemplarily, in two adjacent battery cell assemblies 3 connected to the first pressure strip 21, the reinforcing rib 213 is located on one side of one of the battery cell assemblies 3 along the first direction R1.

[0173] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 7 The reinforcing ribs 213 abut against the two adjacent second pressure strips 22 on opposite sides along the first direction R1.

[0174] For example, at least one second pressure strip 22 abuts against the reinforcing rib 213 on one side along the first direction R1, and at least one second pressure strip 22 abuts against the limiting rib 212 on the other side along the first direction R1.

[0175] For example, at least one pressure strip abuts against the reinforcing rib 213 on opposite sides along the first direction R1.

[0176] In this embodiment, the reinforcing rib 213 abuts against two adjacent second pressure strips 22 on opposite sides along the first direction R1. The reinforcing rib 213 can limit the second pressure strips 22 along the first direction R1, reducing the movement of the second pressure strips 22 relative to the first pressure strip 21. This is beneficial for the first pressure strip 21 and the second pressure strip 22 to bear the force as a whole, improving the structural rigidity of the pressure strip assembly 2, thereby better constraining the battery cell assembly 3 and reducing the expansion deformation of the battery cell assembly 3 along the second direction R2.

[0177] It is understood that the reinforcing rib 213 is not limited to abutting against two adjacent second pressure strips 22 on opposite sides along the first direction R1. Exemplarily, the reinforcing rib 213 is spaced apart from the second pressure strips 22 on opposite sides along the first direction R1.

[0178] In some embodiments, please refer to Figures 6-9 The pressure strip assembly 2 includes at least three second pressure strips 22, one of which is a preset pressure strip 221. The preset pressure strip 221 spans across the battery cells 31 of two adjacent battery cell assemblies 3 along the first direction R1. The preset pressure strip 221 is provided with second pressure strips 22 on opposite sides along the first direction R1.

[0179] For example, the number of second pressure strips 22 in each pressure strip assembly 2 is three, four, or five.

[0180] In this embodiment, a preset pressure strip 221 is disposed across the battery cells 31 of two adjacent battery cell assemblies 3 along a first direction R1. The preset pressure strip 221 is located at a position where the first pressure strip 21 is more prone to damage and cracking. The preset pressure strip 221 assists the first pressure strip 21 in bearing force, reduces the damage and failure of the first pressure strip 21, increases the structural rigidity of the battery cell assembly 3, and improves the main frequency of the battery device 100. Second pressure strips 22 are respectively provided on opposite sides of the preset pressure strip 221 along the first direction R1. The second pressure strips 22 on both sides of the preset pressure strip 221 are closer to the position where the deformation of the battery cell 31 is greater, which can better constrain the deformation of the battery cell assembly 3 and improve the expansion performance of the battery device 100.

[0181] It is understood that the preset pressure strip 221 is not limited to having second pressure strips 22 respectively on both sides of the first direction R1. For example, the preset pressure strip 221 has a second pressure strip 22 on one side of the first direction R1, and the preset pressure strip 221 abuts against the first pressure strip 21 on the other side of the first direction R1.

[0182] In some embodiments, please refer to Figure 4 , Figure 5 , Figure 8 and Figure 9 At least two second pressure strips 22 on each first pressure strip 21 are arranged at intervals along the first direction R1.

[0183] In this embodiment, at least two second pressure strips 22 on each first pressure strip 21 are arranged at intervals along a first direction R1. While ensuring the pressure strip assembly 2 meets the expansion requirements of the battery cell assembly 3, the material usage of the second pressure strips 22 on the pressure strip assembly 2 can be reduced, thus reducing the weight of the battery device 100. The arrangement of at least two second pressure strips 22 at intervals along the first direction R1 provides sufficient space on the first pressure strip 21 for arranging the second pressure strips 22, reducing the assembly precision of the second pressure strips 22.

[0184] It is understood that the at least two second pressure strips 22 on each first pressure strip 21 are not limited to being arranged at intervals along the first direction R1. Exemplarily, the at least two second pressure strips 22 on each first pressure strip 21 abut against each other along the first direction R1.

[0185] In some embodiments, please refer to Figures 2-9 The second pressure strip 22 has an insulating layer 222 on its exterior.

[0186] For example, the insulating layer 222 is made of mica paper or ceramic fiberglass cloth.

[0187] In this embodiment, the second pressure strip 22 has an insulating layer 222 on its outside, and the second pressure strip 22 is insulated from the battery cell 31, reducing creepage and reducing the possibility of arcing between the second pressure strip 22 and the battery cell 31 casing after the first pressure strip 21 is damaged.

[0188] It is understandable that the outer surface of the second pressure strip 22 may not be provided with an insulation layer 222.

[0189] In some embodiments, the first pressure strip 21 is bonded to the second pressure strip 22.

[0190] For example, the first pressure strip 21 and the second pressure strip 22 are connected by double-sided adhesive or structural adhesive.

[0191] For example, the adhesive between the first pressure strip 21 and the second pressure strip 22 is an insulating adhesive.

[0192] In this embodiment, the first pressure strip 21 and the second pressure strip 22 are bonded together, so that the first pressure strip 21 and the second pressure strip 22 are subjected to force as a whole, which increases the structural integrity of the pressure strip assembly 2 and improves the structural rigidity of the pressure strip assembly 2. The bonding of the first pressure strip 21 and the second pressure strip 22 facilitates the assembly of the first pressure strip 21 and the second pressure strip 22 as a whole, and then assembling them with the battery cell assembly 3.

[0193] It is understood that the first pressure strip 21 is not limited to being bonded to the second pressure strip 22. Exemplarily, the first pressure strip 21 and the second pressure strip 22 are snapped together.

[0194] In some embodiments, please refer to Figure 1 The electrode terminals 311 of the battery cell 31 are arranged along the first direction R1, and the pressure strip assembly 2 is located between the electrode terminals 311 of two adjacent battery cells 31 along the first direction R1.

[0195] For example, the same battery cell 31 has two electrode terminals 311 and an explosion-proof valve 312, which is located between the two electrode terminals 311 along a first direction R1.

[0196] In this embodiment of the present disclosure, the electrode terminals 311 of the battery cell 31 are arranged along the first direction R1, and the pressure strip assembly 2 is located between the electrode terminals 311 of two adjacent battery cells 31 along the first direction R1, thereby reducing the space occupied by the pressure strip assembly 2 between the electrode terminals 311 of the same battery cell 31.

[0197] In some embodiments, the large surface of the battery cell 31 intersects with the second direction R2.

[0198] It should be noted that the "large surface" of the battery cell 31 refers to the surface with the largest area on the outer surface of the battery cell 31.

[0199] In some embodiments, please refer to Figure 1 The second pressure strip 22 is connected to the box body 1 at both ends along the second direction R2.

[0200] For example, the second pressure strip 22 is bolted to the housing 1.

[0201] For example, the portion of the second pressure strip 22 located outside the mounting groove 211 is connected to the housing 1.

[0202] In this embodiment, the second pressure strip 22 is connected to the housing 1 at both ends along the second direction R2, the first pressure strip 21 is connected to the battery cell assembly 3, and the first pressure strip 21 is connected to the second pressure strip 22, thereby reducing the movement of the battery cell assembly 3 relative to the housing 1, improving the structural rigidity and structural strength of the battery device 100, and increasing the main frequency of the battery device 100.

[0203] It is understood that the second pressure strip 22 is not limited to being connected to the housing 1. Exemplarily, the second pressure strip 22 is not connected to the housing 1.

[0204] In some embodiments, please refer to Figures 1-9At least two battery cell assemblies 3 are arranged along a first direction R1. Each battery cell assembly 3 includes at least two battery cells 31 arranged along a second direction R2, which intersects with the first direction R1. The battery cell assemblies 3 are located inside the housing 1. The pressure strip assembly 2 includes a first pressure strip 21 and at least two second pressure strips 22. The first pressure strip 21 spans across the battery cells 31 of two adjacent battery cell assemblies 3 along the first direction R1 and is connected to at least two battery cells 31 of the corresponding battery cell assembly 3. The at least two second pressure strips 22 are connected to the side of the first pressure strip 21 facing away from the battery cell assembly 3 along a third direction R3, which intersects with the first direction R1 and the second direction R2 respectively. The at least two second pressure strips 22 are arranged along the first direction R1. The first pressure strip 21 has a mounting groove 211, and the at least two second pressure strips 22 are at least partially located within the mounting groove 211. The first pressure strip 21 has limiting ribs 212 on opposite sides along the first direction R1, and all second pressure strips 22 are located between the limiting ribs 212 along the first direction R1. The limiting ribs 212 abut against the corresponding second pressure strips 22 along the first direction R1. The first pressure strip 21 has reinforcing ribs 213 extending along the second direction R2, and the reinforcing ribs 213 protrude along the third direction R3 away from the side of the battery cell assembly 3. At least two second pressure strips 22 are located on opposite sides of the reinforcing ribs 213 along the first direction R1. At least one reinforcing rib 213 spans across two adjacent battery cell assemblies 3 along the first direction R1. The reinforcing ribs 213 abut against two adjacent second pressure strips 22 on opposite sides along the first direction R1. At least two second pressure strips 22 on each first pressure strip 21 are spaced apart along the first direction R1. The exterior of the second pressure strip 22 has an insulating layer 222. The first pressure strip 21 and the second pressure strip 22 are bonded together. The electrode terminals 311 of the battery cell 31 are arranged along the first direction R1, and the pressure strip assembly 2 is located between the electrode terminals 311 of two adjacent battery cells 31 along the first direction R1. The two ends of the second pressure strip 22 along the second direction R2 are respectively connected to the housing 1. The first pressure strip 21 is made of insulating material, and the second pressure strip 22 is made of metal material.

[0205] The above embodiments are merely illustrative of the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A battery device, characterized in that, include: Box; At least two battery cell assemblies are arranged along a first direction, each battery cell assembly includes at least two battery cells arranged along a second direction, the second direction being intersected with the first direction, and the battery cell assemblies are located within the housing. A pressure strip assembly includes a first pressure strip and at least two second pressure strips. The first pressure strip spans across the battery cells of two adjacent battery cell assemblies along a first direction. The first pressure strip is connected to at least two battery cells of the corresponding battery cell assembly. At least two second pressure strips are connected to the side of the first pressure strip away from the battery cell assembly along a third direction. The third direction is arranged to intersect the first direction and the second direction respectively. At least two second pressure strips are arranged along the first direction.

2. The battery device according to claim 1, characterized in that, The first pressure strip has a mounting groove, and at least two of the second pressure strips are at least partially located within the mounting groove.

3. The battery device according to claim 2, characterized in that, The first pressure strip has limiting ribs on opposite sides along the first direction, and all the second pressure strips are located between the limiting ribs along the first direction.

4. The battery device according to claim 3, characterized in that, The limiting rib abuts against the corresponding second pressure strip along the first direction.

5. The battery device according to claim 1, characterized in that, The first pressure strip has a reinforcing rib extending along the second direction, the reinforcing rib protruding along the third direction away from the side of the battery cell assembly, and at least two second pressure strips are respectively located on opposite sides of the reinforcing rib along the first direction.

6. The battery device according to claim 5, characterized in that, At least one of the reinforcing ribs is disposed across two adjacent battery cell assemblies along the first direction.

7. The battery device according to claim 5, characterized in that, The reinforcing ribs abut against two adjacent second pressure strips on opposite sides along the first direction.

8. The battery device according to claim 1, characterized in that, The pressure strip assembly includes at least three second pressure strips, one of which is a preset pressure strip. The preset pressure strip spans across the battery cells of two adjacent battery cell assemblies along the first direction, and the preset pressure strip has second pressure strips respectively disposed on opposite sides along the first direction.

9. The battery device according to any one of claims 1 to 8, characterized in that, At least two second pressure strips on each of the first pressure strips are arranged at intervals along the first direction.

10. The battery device according to any one of claims 1 to 8, characterized in that, The second pressure strip has an insulating layer on its exterior.

11. The battery device according to any one of claims 1 to 8, characterized in that, The first pressure strip is bonded to the second pressure strip.

12. The battery device according to any one of claims 1 to 8, characterized in that, The electrode terminals of the battery cell are arranged along the first direction, and the pressure strip assembly is located between the electrode terminals of two adjacent battery cells along the first direction.

13. The battery device according to any one of claims 1 to 8, characterized in that, The second pressure strip is connected to the box body at both ends along the second direction.

14. The battery device according to any one of claims 1 to 8, characterized in that, The first pressure strip is made of insulating material; and / or the second pressure strip is made of metallic material.

15. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1 to 14.

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