Battery devices and power consumption devices

Abstract

The battery device (1100) includes a housing (10), a battery cell (20), and a protective plate (100), with the battery cell (20) installed inside the housing (10). Along the direction of gravity, the protective plate (100) is installed at the bottom of the battery cell (20), and the protective plate (100) includes a first fibrous resin layer (110), an intermediate layer (120), and a second fibrous resin layer (130) that are sequentially stacked along a first direction, with the intermediate layer (120) including a resin frame portion (121) and a puncture prevention plate portion (122), the puncture prevention plate portion (122) being located inside the resin frame portion (121), and the resin frame portion (121) being connected between the first fibrous resin layer (110) and the second fibrous resin layer (130). A power consumption device using the above battery device (1100) is provided.

Description

Technical Field

[0001] (Cross-reference to Related Applications) This application claims the priority of Chinese Patent Application No. 202420647264.5, titled "Protection Plate, Housing, Battery and Power Consumption Device", filed on April 1, 2024, and all the contents of the said application are incorporated herein by reference.

[0002] This application relates to the field of battery technology, specifically to battery devices and power consumption devices.

Background Art

[0003] Energy conservation and emission reduction are the key to the sustainable development of the automotive industry. Electric vehicles have become an important component of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental friendliness. For electric vehicles, battery technology is also an important factor related to their development.

[0004] How to improve the reliability of battery devices is a problem to be solved in battery technology.

Summary of the Invention

[0005] In view of the above problems, this application provides a battery device and a power consumption device that can improve the reliability of the battery device.

[0006] In a first aspect, this application provides a battery device, which includes a housing, a battery cell, and a protection plate, and the battery cell is installed in the housing. Along the gravity direction, the protection plate is installed at the bottom of the battery cell, and the protection plate includes a first fiber resin layer, an intermediate layer, and a second fiber resin layer that are sequentially laminated and installed along a first direction. The intermediate layer includes a resin frame portion and a puncture prevention plate portion, the puncture prevention plate portion is located within the resin frame portion, and the resin frame portion is connected between the first fiber resin layer and the second fiber resin layer.

[0007] In the invention of this application, the intermediate layer includes a puncture-resistant plate, and since the puncture-resistant plate is located between the first fiber resin layer and the second fiber resin layer, the risk of corrosion of the puncture-resistant plate can be reduced. When the protective plate is subjected to an external force, the puncture-resistant plate improves the protective plate's ability to resist the external force, thereby reducing the risk of excessive deformation of the protective plate. At the same time, the resin frame improves the protective plate's ability to resist external impacts by further increasing the strength and rigidity of the protective plate, which is also advantageous in improving the reliability of the battery device. In embodiments in which the protective plate is connected to the housing via the resin frame, the installation of the resin frame can also improve the connection stability between the protective plate and the housing.

[0008] In one or more embodiments of the first aspect, the puncture prevention plate portion includes a plurality of sub-plate portions arranged at intervals, and a partition strip is provided within the resin frame portion, the partition strip being provided between two adjacent sub-plate portions.

[0009] In the above proposal, by installing multiple sub-plate sections at intervals, the stress distribution of the protective plate can be optimized, reducing the risk of excessive deformation of the protective plate due to excessive force at a single point. The installation of partition strips may also be used as an assembly reference for the sub-plate sections, which is advantageous for improving the assembly efficiency of the protective plate.

[0010] In one or more embodiments of the first aspect, the puncture prevention plate portion has a flat plate structure.

[0011] In the above design, since the puncture prevention plate section has a flat plate structure, the risk of stress concentration in the puncture prevention plate section is low, and structural stability is high.

[0012] In one or more embodiments of the first aspect, the protective plate portion has a flat plate structure.

[0013] In the above proposal, since the protective plate has a flat structure, on the one hand, the flat protective plate can be processed using an extrusion molding process, which is advantageous in improving the production efficiency of the protective plate. On the other hand, the difficulty of assembling the housing and the protective plate can be reduced. Furthermore, on the other hand, it is advantageous in reducing the risk of sealing defects between the housing and the protective plate.

[0014] In one or more embodiments of the first aspect, the width of the protective plate is W, the size of the puncture-preventing plate portion is w in the width direction of the protective plate, and 0.6 ≤ w / W < 1.

[0015] In the above proposal, by setting the size of the puncture-prevention plate portion within a reasonable range in the width direction of the protective plate, the protective plate can be provided with high structural strength and a large puncture-prevention area, while the weight of the protective plate can be controlled within a reasonable range, thereby enabling the battery device to have a high energy density.

[0016] In one or more embodiments of the first aspect, the length of the protective plate is L, the size of the puncture-preventing plate portion in the longitudinal direction of the protective plate is l, and 0.6 ≤ l / L < 1.

[0017] In the above proposal, by setting the size of the puncture-prevention plate portion within a reasonable range in the longitudinal direction of the protective plate, the protective plate can be provided with high structural strength and a large puncture-prevention area, while the weight of the protective plate can be controlled within a reasonable range, thereby enabling the battery device to have a high energy density.

[0018] In one or more embodiments of the first aspect, the thickness of the resin frame portion is equal to the thickness of the puncture prevention plate portion.

[0019] In the above solution, the plate thickness of the resin frame portion is equal to the plate thickness of the puncture prevention plate portion. On the one hand, it is advantageous for closely adhering the first fiber resin layer and the second fiber resin layer to the surface of the intermediate layer, thereby being advantageous for improving the connection strength between the first fiber resin layer, the second fiber resin layer, and the intermediate layer. On the other hand, the risk of stress concentration between the resin frame portion and the puncture prevention plate portion can be reduced.

[0020] In one or more embodiments of the first aspect, the layer thickness of the second fiber resin layer is greater than the layer thickness of the first fiber resin layer.

[0021] In the above solution, since the layer thickness of the second fiber resin layer is greater than the layer thickness of the first fiber resin layer, the second fiber resin layer has high structural strength, and after an external force acts on the protection plate through the second fiber resin layer, the risk of excessive deformation of the protection plate and corrosion of the puncture prevention plate portion can be reduced.

[0022] In one or more embodiments of the first aspect, the layer thickness of the first fiber resin layer is h1, and 0 < h1 ≤ 1.2 mm.

[0023] In the above solution, by setting the layer thickness of the first fiber resin layer within a reasonable range, the first fiber resin layer has high resistance to external impacts, reduces the risk of corrosion of the puncture prevention plate portion, and the battery device has high energy density and can also reduce the manufacturing cost.

[0024] In one or more embodiments of the first aspect, the layer thickness of the second fiber resin layer is h2, and 0 < h2 ≤ 1.2 mm.

[0025] In the above solution, by setting the layer thickness of the second fiber resin layer within a reasonable range, the second fiber resin layer has high resistance to external impacts, reduces the risk of corrosion of the puncture prevention plate portion, and the battery device has high energy density and can also reduce the manufacturing cost.

[0026] [[ID=二十七]] In one or more embodiments of the first aspect, the plate thickness of the puncture prevention plate portion is h3, and 0 < h3 ≤ 1 mm.

[0027] In the above solution, by setting the plate thickness of the puncture prevention plate portion within a reasonable range, the protection plate portion has a high resistance ability against external impacts, the battery device has a high energy density, and the manufacturing cost can also be reduced.

[0028] In one or more embodiments of the first aspect, the protection plate further includes an adhesive layer, and the first fiber resin layer and the intermediate layer are adhered via the adhesive layer, and / or the second fiber resin layer and the intermediate layer are adhered via the adhesive layer.

[0029] In the above solution, by providing the adhesive layer, the connection strength between the intermediate layer and the first fiber resin layer can be improved, and the risk of corrosion of the puncture prevention plate portion due to the peeling between the intermediate layer and the first fiber resin layer and / or the second fiber resin layer can be reduced.

[0030] In one or more embodiments of the first aspect, the adhesive layer includes a resin film layer.

[0031] In the above solution, by using the resin film layer as the adhesive layer, on the one hand, its bonding with the fiber resin layer becomes closer, and on the other hand, it is beneficial to reduce the weight of the protection plate and improve the energy density of the battery device.

[0032] In one or more embodiments of the first aspect, the layer thickness of the adhesive layer is h4, and 0 < h4 ≤ 0.5 mm.

[0033] In the above solution, by setting the layer thickness of the adhesive layer within a reasonable range, the connection strength between the fiber resin layer and the intermediate layer can be increased, and the battery device can have a high energy density.

[0034] In one or more embodiments of the first aspect, the region corresponding to the puncture prevention plate portion of the protection plate is recessed along the first direction to form a receiving cavity, the bottom surface of the receiving cavity protrudes in the opposite direction of the first direction to form a boss, and the boss is provided with a recessed hole for the first fastener to pass through.

[0035] In the above design, since the first fastener is housed in a recessed hole, on the one hand, the outward protrusion of the first fastener can be reduced, which is advantageous in reducing the risk of abrasion to the first fastener, and thereby is advantageous in increasing the connection strength between the protective plate and the housing. On the other hand, it is also advantageous in reducing the size of the battery, which allows the battery device to have a high energy density.

[0036] In one or more embodiments of the first aspect, the projection height of the boss is H, and 0 mm <H≦10mmである。

[0037] In the above proposal, by setting the protrusion height of the boss within a reasonable range, on the one hand, a large assembly space for the first fastener can be provided, reducing the difficulty of assembling the first fastener, and on the other hand, the entire protective plate can have high structural strength.

[0038] In one or more embodiments of the first embodiment, the first fiber resin layer comprises a plurality of layers of first fiber-reinforced prepregs laminated together, and the second fiber resin layer comprises a plurality of layers of second fiber-reinforced prepregs laminated together.

[0039] In the above proposal, the strength and rigidity of the protective plate are improved, and the multilayer structure contributes to improving the fatigue resistance of the material by distributing stress and reducing stress concentration phenomena.

[0040] In one or more embodiments of the first aspect, the puncture prevention plate portion is a steel plate, and a zinc-plated layer, a zinc-plated iron alloy layer, or an electrophoretic paint protective layer is provided on the outer surface of the steel plate.

[0041] In the above proposal, a zinc-plated layer, a zinc-plated iron alloy layer, or an electrophoretic paint protective layer is applied to the outer surface of the steel plate, allowing the reinforcing layer to have high abrasion resistance.

[0042] In one or more embodiments of the first embodiment, the first fiber resin layer and the second fiber resin layer are each independently selected from glass fiber reinforced polyamide resin parts, glass fiber reinforced polypropylene resin parts, glass fiber reinforced polyethylene resin parts, glass fiber reinforced polycarbonate resin parts, or glass fiber reinforced polystyrene resin parts.

[0043] In a second aspect, the present application provides a power consumption device which includes a battery device in one or more of the above embodiments, the battery device being used to supply electrical energy.

[0044] In the above proposal, since the battery device in one or more of the above embodiments has high reliability, the power consumption device including the battery device in one or more of the above embodiments also has high reliability.

[0045] The above description is merely an overview of the technical proposal of this application. However, in order to provide a clearer understanding of the technical means of this application, and to make the implementation according to the specification, as well as to make the other objectives, features, and advantages of this application clearer and easier to understand, specific embodiments of this application are listed below. [Brief explanation of the drawing]

[0046] For those skilled in the art, various other advantages and benefits will become clear upon reading the detailed description of the preferred embodiments below. The drawings are for illustrative purposes only and should not be considered limiting to this application. In all drawings, the same components are denoted by the same reference numerals. The drawings are as follows:

[0047] [Figure 1] This is a schematic diagram of the structure of a vehicle according to several embodiments of this application. [Figure 2] This is a schematic diagram of the structure of a battery according to several embodiments of this application. [Figure 3] This is a schematic exploded view of a protective plate according to several embodiments of this application. [Figure 4] Figure 3 is a schematic diagram of the intermediate layer structure. [Figure 5] Figure 3 is a schematic diagram of the protective plate structure. [Figure 6] This is a cross-sectional view along line AA in Figure 5. [Figure 7] This is a magnified view of area B in Figure 6. [Figure 8] This is a magnified view of area C in Figure 7. [Figure 9] This is a schematic diagram of the structure of a housing according to several embodiments of this application. [Figure 10] This is a cross-sectional view along the DD line in Figure 9. [Figure 11] This is a magnified view of area E in Figure 10.

[0048] The reference numerals in the drawings for embodiments of the invention are as follows: 1000-Vehicle, 1100-Battery unit, 1200-Controller, 1300-Motor, 100-Protective plate, 1001-Housing cavity, 110-First fiber resin layer, 120-Intermediate layer, 121-Resin frame section, 1211-Partition strip, 122-Puncture prevention plate section, 1221-Sub-plate section, 130-Second fiber resin layer, 140-Adhesive layer, 150-Boss, 151-Recessed hole, 200-Housing body, 300-Intermediate beam, 410-First fastener, 420-Second fastener, 500-Sealing member, 10-Housing, 11-First part, 12-Second part, 20-Battery cell, 30-Heat exchange plate, 31-Flow channel, 32-Surface protrusion [Modes for carrying out the invention]

[0049] The embodiments of the technical proposal of this application will be described in detail below with reference to the drawings. The following embodiments are merely illustrative and are provided solely to clarify the technical proposal of this application, and do not limit the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application pertains. The terms used herein are for illustrative purposes only and are not intended to limit this application. The terms “including” and “having” and any variations thereof in the description and claims of this application, as well as in the description of the drawings, are intended to intentionally cover the non-exclusive “including.”

[0051] In the description of the embodiments of this application, technical terms such as “first,” “second,” etc., are intended solely to distinguish different subjects, and are not to be understood as indicating or implying relative importance, or implicitly indicating the number, specific order, or hierarchical relationship of the indicated technical features. In the description of the embodiments of this application, unless otherwise specifically limited, “multiple” means two or more.

[0052] As used herein, “Examples” means that certain features, structures, or properties described in combination with the Examples may be included in at least one Example of this Application. The phrase “Examples” appearing in various places in the Specification does not necessarily refer to the same Example, nor do they represent mutually exclusive, independent, or substitutable Examples. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described herein can be combined with other Examples.

[0053] In the description of the embodiments of this application, the term "multiple" means two or more (including two), similarly, "multiple groups" means two or more groups (including two groups), and "multiple sheets" means two or more (including two sheets).

[0054] In the embodiments of this application, the battery cell may be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material through charging after the battery cell has been discharged.

[0055] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, and lead-acid batteries.

[0056] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a battery cell, active ions (e.g., lithium ions) move back and forth between the positive and negative electrodes, undergoing intercalation and deintercalation. The separator is placed between the positive and negative electrodes and serves to reduce the risk of short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0057] In some embodiments, the separator is an isolation membrane. The isolation membrane can be selected from known porous structures that exhibit excellent chemical and mechanical stability.

[0058] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0059] In some embodiments, the electrode assembly has a layered structure.

[0060] In some embodiments, the shape of the electrode assembly may be cylindrical, flattened, or polygonal prism-shaped, etc.

[0061] In some embodiments, the battery cell may include a housing. The housing is used to package components such as electrode assemblies and electrolytes. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., copper-aluminum composite housing), or an aluminum-plastic film.

[0062] For example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft pack battery cell, or a battery cell of other shape. The prismatic battery cell includes prismatic battery cells, blade-shaped battery cells, and polygonal prismatic battery cells, and a polygonal prismatic battery cell is, for example, a hexagonal prismatic battery cell.

[0063] The battery apparatus referred to in the embodiments of this application may include one or more battery cell assemblies for supplying voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or series-parallel via a bus member.

[0064] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, a battery cell assembly may also be a battery module, which forms a single independent module by arranging and fixing multiple battery cells. For example, a battery module may be formed by bundling multiple battery cells together with cable ties.

[0065] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies, the battery cell assemblies housed within the housing.

[0066] For example, the battery cell assembly may be a battery module, and the battery cell assembly may be housed within the housing by fixing the battery module inside the housing.

[0067] For example, a battery cell assembly may be housed within a housing by directly fixing multiple battery cells to the housing.

[0068] In some embodiments, the housing may be used as part of the vehicle's chassis structure. For example, part of the housing may be at least part of the vehicle's floor, or part of the housing may be at least part of the vehicle's cross members and side members.

[0069] In some embodiments, the battery may be an energy storage device. The energy storage device may include an energy storage container, an energy storage electrical cabinet, and the like.

[0070] The following description will primarily focus on rectangular battery cells. It should be understood that the embodiments described below are applicable in some respects to cylindrical, softpack, or blade-type battery cells as well.

[0071] The development of battery technology requires the simultaneous consideration of multiple design elements, such as performance parameters including reliability, cycle life, discharge capacity, and charge / discharge rate, as well as the reliability of the battery device itself.

[0072] Conventional battery devices generally include a housing and a protective plate. The protective plate is installed at the bottom of the housing, and to improve the protective plate's ability to withstand impacts from the bottom of the battery device, a puncture-resistant plate section is generally installed on the protective plate. Furthermore, to reduce the risk of corrosion of the puncture-resistant plate section, the puncture-resistant plate section is wrapped in two corrosion-resistant layers, and then the two corrosion-resistant layers and the puncture-resistant plate section are processed together and connected to the housing to complete the assembly of the protective plate. In order to maintain high structural stability of the puncture-resistant plate section, when connecting the puncture-resistant plate section to the housing, the connection area between the two generally avoids the area where the puncture-resistant plate section is installed. That is, the part of the puncture-resistant plate section located in the connection area between the two generally contains only two corrosion-resistant layers, resulting in low connection stability between the housing and the protective plate and low reliability of the battery device.

[0073] In view of this, the present application provides a battery device comprising a housing, battery cells, and a protective plate, wherein the battery cells are installed within the housing. Along the direction of gravity, the protective plate is installed at the bottom of the battery cells, and the protective plate comprises a first fibrous resin layer, an intermediate layer, and a second fibrous resin layer sequentially laminated along a first direction, the intermediate layer comprising a resin frame portion and a puncture-resistant plate portion, the puncture-resistant plate portion being located within the resin frame portion, and the resin frame portion being connected between the first fibrous resin layer and the second fibrous resin layer. Because the intermediate layer includes the puncture-resistant plate portion and the puncture-resistant plate portion is located between the first fibrous resin layer and the second fibrous resin layer, the risk of corrosion of the puncture-resistant plate portion can be reduced. When the protective plate is subjected to an external force, the puncture-resistant plate portion can reduce the risk of excessive deformation of the protective plate by improving the protective plate's ability to resist the external force. Furthermore, the resin frame section can improve the protective plate's ability to resist external impacts by further enhancing its strength and rigidity, and is also advantageous in improving the reliability of the battery device. In embodiments where the protective plate is connected to the housing via the resin frame section, the installation of the resin frame section can also improve the connection stability between the protective plate and the housing.

[0074] The technical solutions described in the embodiments of this application apply to battery cells, battery devices, and power consumption devices using battery devices.

[0075] Power-consuming devices may include, but are not limited to, vehicles, mobile phones, portable devices, laptop computers, ships, aerospace vehicles, electric toys, and power tools. Aerospace vehicles 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, polishing 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. Power-consuming devices may also include energy storage devices such as energy storage cabinets and energy storage containers.

[0076] In the following embodiments, for the sake of clarity, the power consumption device of one embodiment of this application will be described as a vehicle 1000.

[0077] Referring to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of the present application, the vehicle 1000 may be a fuel oil vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. A battery unit 1100 is installed inside the vehicle 1000, and the battery unit 1100 may be installed at the bottom, front, or rear of the vehicle 1000. The battery unit 1100 may be used to power the vehicle 1000, for example, the battery unit 1100 can function as the operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 1200 and a motor 1300, the controller 1200 is used to control the battery unit 1100 to power the motor 1300 for, for example, starting the vehicle 1000, navigation, and operating power consumption needs while driving.

[0078] In some embodiments of this application, the battery device 1100 can not only function as an operating power source for the vehicle 1000, but can also provide driving power to the vehicle 1000 by replacing or partially replacing fuel oil or natural gas as a driving power source for the vehicle 1000.

[0079] Referring to Figure 2, the battery device 1100 includes a housing 10 and battery cells 20, the battery cells 20 being housed within the housing 10. Here, the housing 10 is used to provide housing space for the battery cells 20, and the housing 10 can employ various structures.

[0080] In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 covering each other, and the first portion 11 and the second portion 12 jointly partitioning a housing space for housing the battery cell 20. The second portion 12 may be a hollow structure with one end open, and the first portion 11 may be a plate-like structure, the first portion 11 being covered by the open side of the second portion 12, thereby the first portion 11 and the second portion 12 jointly partitioning a housing space, both the first portion 11 and the second portion 12 may be hollow structures with one side open, the open side of the first portion 11 being covered by the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 may have various shapes such as cylindrical or rectangular parallelepiped.

[0081] In the battery device 1100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in series-parallel connection, where series-parallel connection means that the multiple battery cells 20 are connected in both series and parallel.

[0082] In one embodiment, a plurality of battery cells 20 may be directly connected in series, parallel, or series-parallel, and then the entire assembly of the plurality of battery cells 20 may be housed in the housing 10. Of course, the battery device 1100 may first form a battery module by connecting a plurality of battery cells 20 in series, parallel, or series-parallel, and then form an entire assembly by connecting a plurality of battery modules in series, parallel, or series-parallel, and then housed in the housing 10. The battery device 1100 may further include other structures; for example, the battery device 1100 may further include a bus member for realizing electrical connections between the plurality of battery cells 20.

[0083] In this application, the battery cell 20 may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, lithium metal batteries, or magnesium-ion batteries, and is not limited thereto in the embodiments of this application. The battery cell 20 may be cylindrical, flattened, rectangular, or have other shapes, and is not limited thereto in the embodiments of this application. The battery cell 20 is generally classified into three types according to its packaging method: cylindrical battery cell 20, prismatic battery cell 20, and soft pack battery cell 20.

[0084] Figures 3 to 8 are schematic diagrams that typically show the protective plate 100 according to the embodiments of this application. In the following exemplary embodiments, the protective plate 100 according to the embodiments of this application will be described using a battery device 1100 applied to a power consumption device as an example. Various modifications, additions, substitutions, deletions or other changes will be made to the following embodiments in order to apply the relevant design of the protective plate 100 according to the embodiments of this application to other applications, but it will be readily apparent to those skilled in the art that these changes remain within the scope of the principles of the power consumption device according to the embodiments of this application.

[0085] Referring to some embodiments of this application, specifically Figures 3 to 8, this application provides a battery device 1100 comprising a housing 10, battery cells 20, and a protective plate 100, wherein the battery cells 20 are installed inside the housing 10. Along the direction of gravity, the protective plate 100 is installed at the bottom of the battery cells 20, and the protective plate 100 comprises a first fibrous resin layer 110, an intermediate layer 120, and a second fibrous resin layer 130, which are sequentially stacked along a first direction, and the intermediate layer 120 comprises a resin frame portion 121 and a puncture-prevention plate portion 122, the puncture-prevention plate portion 122 is located inside the resin frame portion 121, and the resin frame portion 121 is connected between the first fibrous resin layer 110 and the second fibrous resin layer 130.

[0086] The first fiber resin layer 110 may also be called the first fiber resin layer, and the second fiber resin layer 130 may also be called the second fiber resin layer.

[0087] In some embodiments, the protective plate 100 may refer to a component that serves to protect the battery cells 20 within the battery device 1100.

[0088] In some embodiments, the protective plate 100 may be used to support the battery cells 20. In some other embodiments, the battery device 1100 further includes a heat exchange plate 30, which is installed between the protective plate 100 and the battery cells 20, and the heat exchange plate 30 is used to support the battery cells 20.

[0089] The first direction can refer to the thickness direction of the protective plate 100. Here, as shown in Figure 3, the protective plate 100 has a thickness direction, a longitudinal direction and a width direction, the thickness direction of the protective plate 100 can refer to the Z direction in the figure, the width direction of the protective plate 100 can refer to the Y direction in the figure, and the longitudinal direction of the protective plate 100 can refer to the X direction in the figure.

[0090] The intermediate layer 120 can refer to the layer located between the first fiber resin layer 110 and the second fiber resin layer 130. The intermediate layer 120 plays a primary protective role, preventing external foreign objects from piercing the protective plate 100. In other words, if the protective plate 100 is pierced by a foreign object, the installation of the intermediate layer 120 reduces the risk of the foreign object piercing the protective plate 100 and damaging the battery cell 20.

[0091] The intermediate layer 120 includes a resin frame portion 121 and a puncture-prevention plate portion 122, where the puncture-prevention plate portion 122 may refer to the portion located in the center of the intermediate layer 120, and the resin frame portion 121 may be annular in shape and circumferentially provided around the puncture-prevention plate portion 122. In some embodiments, the resin frame portion 121 may refer to the portion located at the edge of the intermediate layer 120. The shape of the resin frame portion 121 may include, but is not limited to, a square, U-shape, sun shape, or grid shape.

[0092] In some embodiments, the connection area between the housing 10 and the protective plate 100 is located within the resin frame portion 121. Taking the fastener connection method as an example, the fastener is connected to the housing 10 by sequentially passing through the second fibrous resin layer 130, the resin frame portion 121, and the first fibrous resin layer 110. Taking the welding or heat fusion connection method as an example, along the first direction, at least a portion of the projection of the weld marks formed by welding or heat fusion connection is located within the resin frame portion 121.

[0093] In some embodiments, the first fibrous resin layer 110, the resin frame portion 121, and the second fibrous resin layer 130 may be connected by a structural adhesive.

[0094] In some embodiments, the first fibrous resin layer 110, the resin frame portion 121, and the second fibrous resin layer 130 may be bonded together by the adhesive properties of each resin portion and the local adhesive properties of the resin frame portion 121.

[0095] In some embodiments, the protective plate 100 can have strong fire resistance by installing the first fiber resin layer 110 and the second fiber resin layer 130, and fiber resin composite materials containing fibers such as carbon fibers, aramid fibers, or glass fibers can be used.

[0096] In some embodiments, the protective plate 100 may be connected to the housing 10 by fasteners that pass through the first fiber resin layer 110, the second fiber resin layer 130, and the resin frame portion 121. Since the fasteners pass through the resin frame portion 121, the risk of fastener failure is low, and the connection stability between the protective plate 100 and the housing 10 is high.

[0097] In some embodiments, the first fibrous resin layer 110, the second fibrous resin layer 130, and the resin frame portion 121 may be connected by various methods such as riveting, resin adhesive bonding, adhesive bonding, laser welding, and hot pressing. The installation of the resin frame portion 121 improves the connection strength between the protective plate 100 and the housing 10 without interfering with the puncture prevention member, compared to embodiments in which the resin frame portion 121 is not installed.

[0098] In some embodiments, the installation of a first fiber resin layer 110 or a second fiber resin layer 130 can provide corrosion protection for the intermediate layer 120.

[0099] The material of the resin frame portion 121 may include thermosetting resins such as epoxy resin, phenolic resin, urea-formaldehyde resin, melamine resin, unsaturated polyester resin, organosilicon resin, and polyurethane. It may also include thermoplastic resins such as polyethylene, polypropylene, polyvinyl chloride, and polystyrene. Of course, the material of the resin frame portion 121 may also include, but is not limited to, polyamide, polyacetal, polycarbonate, polyphenylene oxide, polysulfone, and rubber.

[0100] In the invention of this application, the intermediate layer 120 includes a puncture-resistant plate portion 122, and since the puncture-resistant plate portion 122 is located between the first fiber resin layer 110 and the second fiber resin layer 130, the risk of corrosion of the puncture-resistant plate portion 122 can be reduced. When the protective plate 100 is subjected to an external force, the puncture-resistant plate portion 122 can reduce the risk of excessive deformation of the protective plate 100 by improving the protective plate 100's ability to resist the external force. At the same time, the resin frame portion 121 can further improve the protective plate 100's ability to resist external impacts by improving its strength and rigidity, and is also advantageous in improving the reliability of the battery device 1100. In embodiments in which the protective plate 100 is connected to the housing 10 via the resin frame portion 121, the installation of the resin frame portion 121 can also improve the connection stability between the protective plate 100 and the housing 10.

[0101] According to some embodiments of this application, referring to Figures 3 to 8, the puncture prevention plate portion 122 includes a plurality of spaced-apart sub-plate portions 1221, and the resin frame portion 121 has a partition strip 1211, which is provided between two adjacent sub-plate portions 1221.

[0102] The partition strip 1211 functions as part of the resin frame 121, and the partition strip 1211 is also made of resin material. The partition strip 1211 divides the resin frame 121 into multiple areas, and multiple sub-plates 1221 are attached to each area in a one-to-one correspondence, so that the partition strip 1211 separates two adjacent sub-plates 1221. The number of sub-plates 1221 is two, three, or four, but is not limited to these.

[0103] For example, if there are two sub-plates 1221, the two sub-plates 1221 are arranged with a gap between them along the longitudinal direction of the protective plate 100. Of course, in other embodiments, multiple sub-plates 1221 may be arranged in a matrix, or with a gap between them along the width direction of the protective plate 100, and may be designed according to the actual design needs.

[0104] In the above proposal, by installing multiple sub-plate sections 1221 at intervals, the stress distribution of the protective plate 100 can be optimized, reducing the risk of excessive deformation of the protective plate 100 due to excessive force at a single point. The installation of the partition strip 1211 may also be used as an assembly reference for the sub-plate sections 1221, which is advantageous for improving the assembly efficiency of the protective plate 100.

[0105] According to some embodiments of this application, the puncture prevention plate portion 122 has a flat plate structure.

[0106] The fact that the puncture prevention plate portion 122 has a flat plate structure means that two opposing surfaces of the puncture prevention plate portion 122 are flat surfaces along the first direction.

[0107] In the above design, since the puncture prevention plate section 122 has a flat plate structure, the puncture prevention plate section 122 has a low risk of stress concentration and high structural stability.

[0108] According to some embodiments of this application, the protective plate 100 has a flat plate structure.

[0109] The fact that the protective plate 100 has a flat plate structure means that two opposing surfaces of the protective plate 100 are flat surfaces along the first direction. In some embodiments, both the first fibrous resin layer 110 and the second fibrous resin layer 130 have a flat plate structure.

[0110] In the above proposal, since the protective plate 100 has a flat plate structure, on the one hand, the flat protective plate 100 can be processed by an extrusion molding process, which is advantageous in improving the production efficiency of the protective plate 100. On the other hand, the difficulty of assembling the housing 10 and the protective plate 100 can be reduced. Furthermore, on the other hand, it is advantageous in reducing the risk of sealing defects between the housing 10 and the protective plate 100.

[0111] According to some embodiments of this application, referring to Figure 4, the width of the protective plate 100 is W, the size of the puncture prevention plate portion 122 in the width direction of the protective plate 100 is w, and 0.6 ≤ w / W < 1.

[0112] The width W of the protective plate 100 can refer to the distance between two opposing surfaces along the width direction of the protective plate 100.

[0113] In the width direction of the protective plate 100, the size w of the puncture-prevention plate portion 122 can refer to the distance between two opposing surfaces of the puncture-prevention plate portion 122 along the width direction of the protective plate 100.

[0114] For 0.6 ≤ w / W < 1, it can be understood that when w / W < 1, the resin frame portion 121 occupies a certain space in the width direction of the protective plate 100 to connect the first fiber resin layer 110 and the second fiber resin layer 130. When w / W ≥ 0.6, the space occupied by the resin frame portion 121 is small and the space occupied by the puncture prevention plate portion 122 is large in the width direction of the protective plate 100, so the battery cell 20 can be well protected and the protective effect of the protective plate 100 is good.

[0115] In some embodiments, the w / W value may be any number between 0.6 and 0.6 to 1, and exemplary values ​​of w / W may be, but are not limited to, 0.6, 0.62, 0.64, 0.66, 0.68, 0.7, 0.72, 0.74, 0.76, 0.78, 0.8, 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96, 0.98, and 0.99.

[0116] In the above proposal, by setting the size of the puncture-prevention plate portion 122 within a reasonable range in the width direction of the protective plate 100, the protective plate 100 is provided with high structural strength and a large puncture-prevention area, while the weight of the protective plate 100 can be controlled within a reasonable range, thereby enabling the battery device 1100 to have a high energy density.

[0117] According to some embodiments of this application, referring to Figure 4, the length of the protective plate 100 is L, and the size of the puncture prevention plate portion 122 in the longitudinal direction of the protective plate 100 is l, with 0.6 ≤ l / L < 1.

[0118] The length L of the protective plate 100 can refer to the distance between two opposing surfaces along the longitudinal direction of the protective plate 100.

[0119] In the longitudinal direction of the protective plate 100, the size l of the puncture-prevention plate portion 122 can refer to the distance between two opposing surfaces of the puncture-prevention plate portion 122 along the longitudinal direction of the protective plate 100.

[0120] For 0.6 ≤ l / L < 1, it can be understood that when l / L < 1, the resin frame portion 121 occupies a certain space in the longitudinal direction of the protective plate 100 to connect the first fiber resin layer 110 and the second fiber resin layer 130. When l / L ≥ 0.6, the space occupied by the resin frame portion 121 is small and the space occupied by the puncture prevention plate portion 122 is large in the longitudinal direction of the protective plate 100, so the battery cell 20 can be well protected and the protective effect of the protective plate 100 is good.

[0121] In some embodiments, the value of l / L may be any number between 0.6 and 0.6 to 1, and exemplary values ​​of l / L may be, but are not limited to, 0.6, 0.62, 0.64, 0.66, 0.68, 0.7, 0.72, 0.74, 0.76, 0.78, 0.8, 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96, 0.98, and 0.99.

[0122] In the above proposal, by setting the size of the puncture-prevention plate portion 122 in the longitudinal direction of the protective plate 100 within a reasonable range, the protective plate 100 is provided with high structural strength and a large puncture-prevention area, while the weight of the protective plate 100 can be controlled within a reasonable range, thereby enabling the battery device 1100 to have a high energy density.

[0123] According to some embodiments of this application, referring to Figures 5 to 8, the thickness of the resin frame portion 121 is equal to the thickness of the puncture prevention plate portion 122.

[0124] The plate thickness h5 of the resin frame portion 121 can refer to the distance between two opposing surfaces of the resin frame portion 121 along the first direction.

[0125] The plate thickness h3 of the puncture prevention plate portion 122 can refer to the distance between two opposing surfaces of the puncture prevention plate portion 122 along the first direction.

[0126] In the above design, since the thickness of the resin frame portion 121 is equal to the thickness of the puncture-prevention plate portion 122, on the one hand, it is advantageous to more tightly bond the first fibrous resin layer 110 and the second fibrous resin layer 130 to the surface of the intermediate layer 120, thereby improving the connection strength between the first fibrous resin layer 110, the second fibrous resin layer 130 and the intermediate layer 120. On the other hand, it is possible to reduce the risk of stress concentration between the resin frame portion 121 and the puncture-prevention plate portion 122.

[0127] According to some embodiments of this application, referring to Figure 8, the thickness of the second fibrous resin layer 130 is greater than the thickness of the first fibrous resin layer 110.

[0128] The layer thickness h1 of the first fibrous resin layer 110 can refer to the distance between two opposing surfaces of the first fibrous resin layer 110 along a first direction.

[0129] The layer thickness h2 of the second fibrous resin layer 130 can refer to the distance between two opposing surfaces of the second fibrous resin layer 130 along the first direction.

[0130] In the above proposal, since the thickness of the second fiber resin layer 130 is greater than that of the first fiber resin layer 110, the second fiber resin layer 130 has high structural strength, and the risk of excessive deformation of the protective plate 100 and corrosion of the puncture prevention plate portion 122 due to external forces acting on the protective plate 100 through the second fiber resin layer 130 can be reduced.

[0131] According to some embodiments of this application, referring to Figure 8, the thickness of the first fiber resin layer 110 is h1, and 0

[0132] 0 When h1 ≤ 1.2 mm, the first fiber resin layer 110 has a certain thickness and can therefore provide protection to the puncture prevention plate portion 122. When h1 ≤ 1.2 mm, the thickness of the first fiber resin layer 110 is not too thick, which is advantageous in reducing the manufacturing cost of the protective plate 100. Furthermore, the space occupied by the protective plate 100 on the battery device 1100 can be reduced, which is advantageous in reducing the size of the battery device 1100.<h1>

[0133] In some embodiments, the value of h1 may be any number between 1.2 mm and 0 to 1.2 mm, and for example, the value of h1 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, or 1.2 mm, but is not limited to these.

[0134] ​In the above solution, by setting the layer thickness of the first fiber resin layer 110 within a reasonable range, the first fiber resin layer 110 has a high resistance ability against external impacts, reduces the risk of corrosion of the puncture prevention plate portion 122, and the battery device 1100 has a high energy density and can also reduce the manufacturing cost.

[0135] According to some embodiments of the present application, referring to FIG. 8, the layer thickness of the second fiber resin layer 130 is h2, and 0 < h2 ≤ 1.2 mm.

[0136] Regarding 0 < h2 ≤ 1.2 mm, as can be understood, when h2 > 0, since the second fiber resin layer 130 has a certain thickness, it can play a protective role for the puncture prevention plate portion 122. When h2 ≤ 1.2 mm, the layer thickness of the second fiber resin layer 130 is not too thick, which is advantageous for reducing the manufacturing cost of the protection plate 100. Also, the occupied space of the protection plate 100 on the battery device 1100 can be reduced, which is advantageous for reducing the size of the battery device 1100.

[0137] In some embodiments, the value of h2 may be 1.2 mm or any numerical value between 0 and 1.2 mm. Exemplarily, the value of h2 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, but is not limited thereto.

[0138] In the above solution, by setting the layer thickness of the second fiber resin layer 130 within a reasonable range, the second fiber resin layer 130 has a high resistance ability against external impacts, reduces the risk of corrosion of the puncture prevention plate portion 122, and the battery device 1100 has a high energy density and can also reduce the manufacturing cost.

[0139] According to some embodiments of the present application, referring to FIG. 8, the plate thickness of the puncture prevention plate portion 122 is h3, and 0 < h3 ≤ 1 mm.

[0140] For h3≤1mm, for better understanding, when h3>0, since the puncture prevention plate portion 122 has a certain thickness, it can play a role in preventing puncture. When h3≤1mm, the thickness of the puncture prevention plate portion 122 is not too thick, which is beneficial to reducing the manufacturing cost of the protection plate 100.

[0141] In some embodiments, the value of h3 may be 1mm or any numerical value between 0 and 1mm. Exemplarily, the value of h3 may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, but is not limited thereto.

[0142] In the above solution, by setting the plate thickness of the puncture prevention plate portion 122 within a reasonable range, the protection plate 100 has a high resistance ability against external impacts, and the battery device 1100 has a high energy density, and the manufacturing cost can also be reduced.

[0143] According to some embodiments of the present application, referring to FIG. 8, the protection plate 100 further includes an adhesive layer 140, and the first fiber resin layer 110 and the intermediate layer 120 are adhered via the adhesive layer 140, and / or the second fiber resin layer 130 and the intermediate layer 120 are adhered via the adhesive layer 140.

[0144] The adhesive layer 140 can refer to a layer-like substance that can adhere two members. The adhesive layer 140 can refer to a layer-like structure formed after the adhesive applied between the two members is cured, and can also be a layer-like member with adhesiveness on both sides, such as a double-sided tape, etc. Of course, it may be other structures.

[0145] In the above solution, by installing the adhesive layer 140, the connection strength between the intermediate layer 120 and the first fiber resin layer 110 can be improved, and the risk of corrosion of the puncture prevention plate portion 122 due to the peeling between the intermediate layer 120 and the first fiber resin layer 110 and / or the second fiber resin layer 130 can be reduced.

[0146] In some embodiments of the present application, referring to FIG. 8, the adhesive layer 140 includes a resin film layer.

[0147] The adhesive layer 140 adopts a resin film structure. The resin film can refer to an adhesive material. The principle is that due to the properties of the resin, a uniform and durable adhesive surface is formed on the surface of the resin film, thereby achieving an adhesive effect. For example, double-sided tape, hot melt adhesive film, epoxy resin film, etc.

[0148] In the above solution, by using the resin film layer as the adhesive layer 140, on the one hand, its bonding with the fiber resin layer becomes closer, and on the other hand, it is beneficial to reduce the weight of the protection plate 100 and improve the energy density of the battery device 1100.

[0149] According to some embodiments of the present application, referring to FIG. 8, the layer thickness of the adhesive layer 140 is h4, and 0 < h4 ≤ 0.5 mm.

[0150] The layer thickness h4 of the adhesive layer 140 can refer to the distance between two surfaces installed opposite to each other in the first direction of the adhesive layer 140. For 0 < h4 ≤ 0.5 mm, as can be understood, when h4 > 0, the adhesive layer 140 has a certain thickness, so adhesion can be achieved. When h4 ≤ 0.5 mm, the thickness of the adhesive layer 140 is not too thick, the adhesive force of the adhesive layer 140 is good, which is beneficial to reducing the peeling risk of the protection plate 100 and waste of materials, and reducing the manufacturing cost.

[0151] In some embodiments, the value of h4 may be 0, 0.5 mm, or any numerical value between 0 and 0.5 mm. Exemplarily, the value of h4 may be 0.01 mm, 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, but is not limited thereto.

[0152] In the above proposal, by setting the thickness of the adhesive layer within a reasonable range, the connection strength between the fiber resin layer and the intermediate layer 120 can be increased, and the battery device 1100 can have a high energy density.

[0153] According to some embodiments of this application, referring to Figures 9 to 11, the area of ​​the protective plate 100 corresponding to the puncture-prevention plate portion 122 is recessed along a first direction to form a housing cavity 1001, the bottom surface of the housing cavity 1001 protrudes along the opposite direction to the first direction to form a boss 150, the boss 150 is circumferentially provided to form a recessed hole 151 through which the first fastener 410 passes.

[0154] The area of ​​the protective plate 100 corresponding to the puncture-prevention plate portion 122 is recessed along the first direction, forming the housing cavity 1001. To understand this, the central area of ​​the protective plate 100 may be recessed, i.e., the protective plate 100 may have a basin-like structure, thereby forming the housing cavity 1001. Alternatively, the puncture-prevention plate portion 122 may have a flat plate structure, with the inside of the resin frame portion 121 being pulled to form a basin-like structure with an open bottom, and the puncture-prevention plate portion 122 may be located at the bottom wall of the housing cavity 1001, thereby providing protection to the components inside the housing cavity 1001 and the components located on the housing cavity 1001 side.

[0155] When the protective plate 100 is attached to the battery device 1100, the bottom surface of the housing cavity 1001 has a projection that protrudes from the bottom surface of the housing cavity 1001, which is a boss 150. A recessed area is formed on the surface of the protective plate 100 that faces away from the housing cavity 1001, which is formed as a recessed hole 151. The recessed hole 151 can penetrate the bottom surface of the housing cavity 1001. In this way, the first fastener 410 can be connected to members such as the intermediate beam 300 and expansion beam inside the housing 10 by passing through the recessed hole 151 to the protective plate 100 and the heat exchange plate 30 from the outside of the battery device 1100, thereby improving the reliability of the attachment of the protective plate 100. The boss 150 may penetrate the area of ​​the resin frame portion 121 that forms the bottom wall of the housing cavity 1001, or it may penetrate the puncture prevention plate portion 122. The first fastener 410 may be a bolt, screw, or the like.

[0156] In the above design, since the first fastener 410 is housed in the recessed hole 151, on the one hand, the outward protrusion of the first fastener 410 can be reduced, which is advantageous in reducing the risk of abrasion to the first fastener 410, and thereby is advantageous in increasing the connection strength between the protective plate 100 and the housing 10. On the other hand, it is also advantageous in reducing the size of the battery, which allows the battery device 1100 to have a high energy density.

[0157] According to some embodiments of this application, referring to Figures 9 to 11, the protruding height of the boss 150 is H, and 0 mm <H≦10mmである。

[0158] The protruding height H of the boss 150 can refer to the distance between the surface of the boss 150 that faces away from the bottom surface of the housing cavity 1001 and the bottom surface of the housing cavity 1001.

[0159] For 0 mm < H ≤ 10 mm, for better understanding, when H > 0, since the boss 150 has a certain protrusion height, a recessed sinking hole 151 for accommodating the first fastener 410 is formed on the other side surface of the protection plate 100, which is advantageous for reducing the protrusion height of the first fastener 410. When H ≤ 10 mm, the protrusion height H of the boss 150 is not too large, thereby reducing the risk that the overall structural strength of the protection plate 100 is too low.

[0160] In some embodiments, the value of H may be 10 mm or any numerical value between 0 and 10 mm. Exemplarily, the value of H may be 0.1 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, but is not limited thereto.

[0161] In the above solution, by setting the protrusion height H of the boss 150 within a reasonable range, on the one hand, a large assembly space for the first fastener 410 can be provided, and the difficulty of assembling the first fastener 410 can be reduced. On the other hand, the entire protection plate 100 can have high structural strength.

[0162] In some embodiments of the present application, the first fiber resin layer 110 includes a plurality of layers of first fiber reinforced prepregs laminated with each other, and the second fiber resin layer 130 includes a plurality of layers of second fiber reinforced prepregs laminated with each other.

[0163] The fibers of each layer of the first fiber reinforced prepreg are arranged in one direction, and the fibers of two adjacent layers of the first fiber reinforced prepreg are cross-ply laminated so that the arrangement directions are about 90°, and the allowable deviation range of the ply angle of the one-way tape 111 of two adjacent layers of the first fiber reinforced prepreg is ±20. When subjected to a tensile force along the extending direction of the fibers, the fibers of the first fiber reinforced prepreg can effectively bear the tensile force, and by cross-ply laminating the fibers of the adjacent first fiber reinforced prepregs so that the arrangement directions are about 90°, it is advantageous to improve the uniformity of the forces in all directions on the first fiber resin layer 110.

[0164] In another embodiment, the fibers of the first fiber-reinforced prepreg form a fabric in the form of cross-ply.

[0165] Since the fiber arrangement of the second fiber-reinforced prepreg is the same as that of the first fiber-reinforced prepreg, a detailed explanation is omitted.

[0166] In the above proposal, the strength and rigidity of the protective plate 100 are improved, and the multilayer structure contributes to improving the fatigue resistance of the material by distributing stress and reducing stress concentration phenomena.

[0167] According to some embodiments of this application, the puncture prevention plate portion 122 is a steel plate, and a zinc-plated layer, a zinc-plated iron alloy layer, or an electrophoretic paint protective layer is provided on the outer surface of the steel plate.

[0168] In the above proposal, a zinc-plated layer, a zinc-plated iron alloy layer, or an electrophoretic paint protective layer is applied to the outer surface of the steel plate, thereby enabling the reinforcing layer to have high abrasion resistance.

[0169] According to some embodiments of this application, the first fibrous resin layer 110 and the second fibrous resin layer 130 are each independently selected from glass fiber reinforced polyamide resin parts, glass fiber reinforced polypropylene resin parts, glass fiber reinforced polyethylene resin parts, glass fiber reinforced polycarbonate resin parts, or glass fiber reinforced polystyrene resin parts.

[0170] According to some embodiments of this application, referring to Figure 1, this application provides a power consumption device which includes a battery device 1100 in one or more of the above embodiments, the battery device 1100 being used to supply electrical energy.

[0171] In the above-described proposal, since the battery device 1100 in one or more of the above embodiments has high reliability, the power consumption device including the battery device 1100 in one or more of the above embodiments also has high reliability.

[0172] Referring to some embodiments of this application, specifically Figures 3 to 8, this application provides a battery device 1100 comprising a housing 10, battery cells 20, and a protective plate 100, wherein the battery cells 20 are installed inside the housing 10. Along the direction of gravity, the protective plate 100 is installed at the bottom of the battery cells 20, and the protective plate 100 comprises a first fibrous resin layer 110, an intermediate layer 120, and a second fibrous resin layer 130, which are sequentially stacked along a first direction, and the intermediate layer 120 comprises a resin frame portion 121 and a puncture-prevention plate portion 122, the puncture-prevention plate portion 122 is located inside the resin frame portion 121, and the resin frame portion 121 is connected between the first fibrous resin layer 110 and the second fibrous resin layer 130. The puncture-prevention plate portion 122 includes a plurality of spaced-apart sub-plate portions 1221, and the resin frame portion 121 has a partition strip 1211, which is provided between two adjacent sub-plate portions 1221. The puncture-prevention plate portion 122 has a flat plate structure. The thickness of the resin frame portion 121 is equal to the thickness of the puncture-prevention plate portion 122. The thickness of the second fibrous resin layer 130 is greater than the thickness of the first fibrous resin layer 110. The area of ​​the protective plate 100 corresponding to the puncture-prevention plate portion 122 is recessed along the first direction to form a housing cavity 1001, and the bottom surface of the housing cavity 1001 protrudes along the opposite direction to the first direction to form a boss 150, which is circumferentially provided and forms a recessed hole 151 for the passage of the first fastener 410.

[0173] A heat exchange plate 30 is also installed between the battery cell 20 and the protective plate 100. The heat exchange plate 30 can refer to a component that exchanges heat with the battery cell 20. The heat exchange plate 30 is provided with a flow path 31, and heat exchange of the battery device 1100 is realized as a heat exchange medium flows through the heat exchange plate 30. The heat exchange medium can heat the battery cell 20 and can also cool the battery cell 20. Specifically, it can be designed according to the needs, and the heat exchange medium may be water, air, a refrigerant, etc., but is not limited to these. The heat exchange plate 30 includes two plates, and the surface of at least one of the plates is recessed and docks with the other plate to form a flow path 31. The protrusions formed on the surface of the heat exchange plate 30 by the recess of the flow path 31 become surface protrusions 32. The battery cells 20 are provided inside the housing body 200, the heat exchange plate 30 is capped over the opening of the housing body 200, and the protective plate 100 is attached to the side of the heat exchange plate 30 facing away from the battery cells 20, thereby protecting the battery cells 20 and the heat exchange plate 30. The second fastener 420 is connected to the housing body 200 by passing through the periphery of the protective plate 100 and the periphery of the heat exchange plate 30, and a sealing member 500 is sandwiched between the periphery of the protective plate 100 and the periphery of the heat exchange plate 30, thereby achieving a seal of the housing 10. The second fastener 420 may be a screw, bolt, etc., but is not limited to these, and the sealing member 500 may be a sealant, sealing ring, etc., but is not limited to these. The protective plate 100 may be located at the top of the battery device 1100 or at the bottom of the battery device 1100.

[0174] Finally, it should be noted that the above embodiments are merely for illustrative purposes and not limiting purposes, and while the application has been described in detail with reference to the above embodiments, it is still possible to modify the inventions described in the above embodiments or to make equivalent substitutions for some or all of their technical features, but such modifications or substitutions should not cause the essence of the corresponding inventions to deviate from the scope of the inventions in the embodiments of this application, and should all be included within the scope of the claims and specification of this application. In particular, unless there is a structural inconsistency, the technical features mentioned in each embodiment can be combined in any manner. This application is not limited to the specific embodiments disclosed herein, but includes all inventions included within the claims.

Claims

1. A battery device, The casing and A battery cell installed inside the aforementioned housing, Protective plate and Includes, Along the direction of gravity, the protective plate is installed at the bottom of the battery cell, and the protective plate includes a first fiber resin layer, an intermediate layer, and a second fiber resin layer that are sequentially stacked along the first direction. The aforementioned intermediate layer includes a resin frame portion and a puncture prevention plate portion. A battery device characterized in that the puncture prevention plate portion is located within the resin frame portion, and the resin frame portion is connected between the first fiber resin layer and the second fiber resin layer.

2. The battery device according to claim 1, wherein the puncture prevention plate portion includes a plurality of sub-plate portions arranged at intervals, a partition strip is provided within the resin frame portion, and the partition strip is provided between two adjacent sub-plate portions.

3. The battery device according to any one of claims 1 to 2, characterized in that the puncture prevention plate portion has a flat plate structure.

4. The battery device according to any one of claims 1 to 3, characterized in that the protective plate has a flat plate structure.

5. The battery device according to any one of claims 1 to 4, characterized in that the width of the protective plate is W, the size of the puncture prevention plate portion in the width direction of the protective plate is w, and 0.6 ≤ w / W < 1.

6. The battery device according to any one of claims 1 to 5, characterized in that the length of the protective plate is L, the size of the puncture prevention plate portion in the longitudinal direction of the protective plate is l, and 0.6 ≤ l / L < 1.

7. The battery device according to any one of claims 1 to 6, characterized in that the thickness of the resin frame portion is equal to the thickness of the puncture prevention plate portion.

8. The battery device according to any one of claims 1 to 7, characterized in that the thickness of the second fiber resin layer is greater than the thickness of the first fiber resin layer.

9. The battery device according to any one of claims 1 to 8, characterized in that the thickness of the first fiber resin layer is h1 and 0 < h1 ≤ 1.2 mm.

10. The battery device according to any one of claims 1 to 9, characterized in that the thickness of the second fiber resin layer is h2 and 0 < h2 ≤ 1.2 mm.

11. The battery device according to any one of claims 1 to 10, characterized in that the thickness of the puncture prevention plate portion is h3 and 0 < h3 ≤ 1 mm.

12. The protective plate further includes an adhesive layer, The battery device according to any one of claims 1 to 11, characterized in that the first fiber resin layer and the intermediate layer are bonded together by the adhesive layer, and / or the second fiber resin layer and the intermediate layer are bonded together by the adhesive layer.

13. The battery device according to claim 12, characterized in that the adhesive layer includes a resin film layer.

14. The battery device according to claim 12, characterized in that the thickness of the adhesive layer is h4 and 0 < h4 ≤ 0.5 mm.

15. The battery device according to any one of claims 1 to 14, characterized in that the region of the protective plate corresponding to the puncture prevention plate portion is recessed along the first direction to form a housing cavity, the bottom surface of the housing cavity protrudes along the opposite direction to the first direction to form a boss, and the boss is provided around the periphery to form a recessed hole for the passage of the first fastener.

16. The battery device according to claim 15, characterized in that the protruding height of the boss is H, and 0 mm < H ≤ 10 mm.

17. The first fiber resin layer comprises a plurality of layers of first fiber-reinforced prepregs laminated together. The battery device according to any one of claims 1 to 16, characterized in that the second fiber resin layer includes a plurality of layers of second fiber-reinforced prepregs laminated together.

18. The battery device according to any one of claims 1 to 17, characterized in that the puncture prevention plate portion is a steel plate, and a zinc plating layer, a zinc-plated iron alloy layer, or an electrophoretic paint protective layer is provided on the outer surface of the steel plate.

19. The battery device according to any one of claims 1 to 18, characterized in that the first fiber resin layer and the second fiber resin layer are each independently selected from glass fiber reinforced polyamide resin parts, glass fiber reinforced polypropylene resin parts, glass fiber reinforced polyethylene resin parts, glass fiber reinforced polycarbonate resin parts, or glass fiber reinforced polystyrene resin parts.

20. A power consumption device comprising a battery device according to any one of claims 1 to 19, wherein the battery device is used to supply electrical energy.

Images