Battery, battery assembly, and electric device
By optimizing the way the insulation layer covers the battery surface, allowing the insulation layer to first cover a small area and then extend to a large area, the problem of edge lifting of the battery's outer insulation film is solved, thus improving the battery's safety and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-04-18
- Publication Date
- 2026-06-09
AI Technical Summary
The existing battery outer insulating film is prone to peeling during the covering process, resulting in poor adhesion and posing a risk of electric shock and short circuit.
Design a battery structure in which the insulating layer first covers a smaller surface area and then extends to a larger surface area, increasing the coverage area on the smaller surface area to ensure strong adhesion, and optimizing the distribution of the insulating layer on different surfaces to reduce the risk of edge lifting.
By optimizing the insulation layer coverage method, the connection stability of the insulation layer is improved, the risk of edge lifting and detachment is reduced, and the safety and mechanical stability of the battery are enhanced.
Smart Images
Figure CN224342491U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and more particularly to a battery, battery assembly, and electrical device. Background Technology
[0002] The battery casing is charged, and during the process of assembling the battery into a battery module, an insulating film is usually covered around the battery.
[0003] In related technologies, an insulating film is aligned with the outer periphery of the battery and attached to the outer surface of the battery, with the edge of the insulating film aligned with the edge of the battery.
[0004] However, the existing insulating film covering the outer periphery of the battery has a problem of edge curling. Utility Model Content
[0005] This application provides a battery, a battery assembly, and an electrical device to solve the problem of the first insulating layer covering the surface of the battery body peeling off.
[0006] In a first aspect, embodiments of this application provide a battery, comprising:
[0007] The battery body has a first surface and a second surface, wherein the area of the first surface is larger than the area of the second surface;
[0008] A first insulating layer covers the second surface, and a portion of the first insulating layer extends to the first surface, covering at least a portion of the first surface.
[0009] In some embodiments of this application, the area of the first surface covered by the first insulating layer forms a first region.
[0010] The area on the first surface not covered by the first insulating layer forms the second region.
[0011] In some embodiments of this application, the first region is located on one side of the second region.
[0012] In some embodiments of this application, the second region is located at the center of the first surface, and the first region is located at the edge of the first surface.
[0013] In some embodiments of this application, there are two first surfaces, which are arranged opposite to each other along a first direction.
[0014] In some embodiments of this application, the number of second surfaces is at least two.
[0015] Along a second direction, the two second surfaces are arranged opposite each other; and / or, along a third direction, the two second surfaces are arranged opposite each other.
[0016] The first direction, the second direction, and the third direction are all perpendicular to each other.
[0017] In some embodiments of this application, there are two first insulating layers, which are used to cover two second surfaces in a one-to-one correspondence.
[0018] In some embodiments of this application, on the same first surface, the areas of the first surface covered by two first insulating layers respectively form two first regions.
[0019] In some embodiments of this application, there is a gap between the two first regions along the second direction, and the gap forms the second region.
[0020] And / or, along a third direction, there is a gap between the two first zones, the gap forming a second zone.
[0021] In some embodiments of this application, the second surface includes two first sub-surfaces, which are disposed opposite to each other along a second direction; the first direction and the second direction are perpendicular.
[0022] The first sub-surface is positioned closer to the first region than the second region.
[0023] In some embodiments of this application, the second surface includes two second sub-surfaces arranged opposite each other along a third direction.
[0024] The second sub-surface is connected to the first sub-surface; the second sub-surface is positioned closer to the first region than the second region.
[0025] The first direction, the second direction, and the third direction are all perpendicular to each other.
[0026] In some embodiments of this application, the first insulating layer includes a first sub-insulating layer, which includes a first segment and a second segment connected to each other. The first segment covers a first sub-surface, and the second segment covers a first region.
[0027] In some embodiments of this application, the first insulating layer further includes a second sub-insulating layer, the second sub-insulating layer including a third segment and a fourth segment connected to each other; the third segment covers the second sub-surface; and the fourth segment covers the first region.
[0028] In some embodiments of this application, a first insulating layer covering the first sub-surface extends to the first surface to form a second segment.
[0029] Two first insulating layers, covering a second segment of the same first surface, are spaced apart along a second direction.
[0030] In some embodiments of this application, a first insulating layer covering the second sub-surface extends to the first surface to form a fourth segment.
[0031] Two first insulating layers, covering the fourth segment of the same first surface, are spaced apart along a third direction.
[0032] In some embodiments of this application, a second segment and a fourth segment are stacked on the same first surface.
[0033] In some embodiments of this application, the material of the first insulating layer includes polyethylene terephthalate or polyimide.
[0034] In some embodiments of this application, the battery further includes a second insulating layer disposed on the first surface, the second insulating layer covering the second region, and the second insulating layer covering at least a portion of the first insulating layer located on the first surface.
[0035] In some embodiments of this application, the second insulating layer comprises glass fiber gel or ceramic fiber gel.
[0036] Secondly, embodiments of this application provide a battery assembly, including:
[0037] At least two of the aforementioned batteries.
[0038] In some embodiments of this application, at least two batteries are stacked along a first direction.
[0039] In some embodiments of this application, the battery assembly further includes a second insulating layer located between adjacent batteries.
[0040] Thirdly, embodiments of this application provide a battery assembly including multiple battery sub-groups stacked along a first direction; each battery sub-group includes at least two stacked batteries, which are the batteries described above.
[0041] In some embodiments of this application, the battery assembly further includes a separator disposed between adjacent batteries of the battery sub-group.
[0042] In some embodiments of this application, the battery assembly further includes a second insulating layer located between adjacent battery sub-groups.
[0043] Fourthly, embodiments of this application provide an electrical device including the aforementioned battery or battery assembly.
[0044] This application provides a battery, battery assembly, and electrical device. The battery includes a battery body and a first insulating layer. The battery body has a first surface and a second surface, with the area of the first surface being larger than the area of the second surface. The first insulating layer covers the second surface, and a portion of the first insulating layer extends to the first surface, covering at least a portion of the first surface. The battery provided in this application provides a strong adhesive foundation on the second surface by having the first insulating layer cover it. The partial extension of the first insulating layer to the first surface, covering a portion of the first surface, and the edge of the first insulating layer located on the first surface, reduces the pulling force of the first insulating layer on the second surface on the first insulating layer on the first surface, thus reducing the risk of the edge of the first insulating layer on the first surface lifting off. Attached Figure Description
[0045] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0046] Figure 1 This is a schematic diagram of the battery structure provided in an embodiment of this application;
[0047] Figure 2 A schematic diagram of the structure of a battery with a first surface and a first sub-surface covered by a first insulating layer, provided in an embodiment of this application;
[0048] Figure 3 This is a first-view structural schematic diagram of a battery provided in an embodiment of this application;
[0049] Figure 4 This is a structural schematic diagram of a battery from a second perspective, provided in an embodiment of this application.
[0050] Figure 5 A schematic diagram of the battery body and the second insulating layer of the battery provided in an embodiment of this application;
[0051] Figure 6 This is a schematic diagram of the structure of the battery body covered with a second insulating layer in an embodiment of the present application;
[0052] Figure 7 Schematic diagram of the battery assembly provided in the embodiments of this application Figure 1 ;
[0053] Figure 8 Schematic diagram of the battery assembly provided in the embodiments of this application Figure 2 ;
[0054] Figure 9 Schematic diagram of the battery assembly provided in the embodiments of this application Figure 3 ;
[0055] Figure 10 This is a schematic diagram of the structure of the battery and separator of the battery assembly provided in the embodiments of this application.
[0056] Explanation of reference numerals in the attached figures:
[0057] 100: Battery body; 110: First surface; 120: Second surface; 121: First sub-surface; 122: Second sub-surface;
[0058] 200: First insulating layer; 210: First segment; 220: Second segment; 230: Third segment; 240: Fourth segment;
[0059] 300: Second insulating layer;
[0060] 400: Separator.
[0061] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0062] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0063] The battery casing is charged. In order to avoid the harm caused by the charged casing, an insulating layer is usually covered around the battery during the assembly of the battery into a battery module.
[0064] On one hand, the insulation layer prevents the risk of electric shock to users or equipment from a charged casing. By providing electrical isolation, the insulation layer helps ensure battery safety during use. On the other hand, the insulation layer prevents accidental contact between adjacent batteries, thereby reducing the risk of short circuits.
[0065] In related technologies, when the housing is square, it includes large surfaces, side surfaces, and end surfaces. The two largest surfaces of the housing are defined as large surfaces, the two smaller side surfaces as small surfaces, and the two surfaces with pole posts as end surfaces. When covering the outer perimeter of the housing with an insulating layer, two insulating layers are respectively attached to the large surfaces, and then overlapped on the small surfaces.
[0066] However, because the overlapping surface is on the smaller surface, and the area of the smaller surface is smaller than that of the larger surface, the bonding area of the insulation layer on the smaller surface is limited. This means that the adhesion of the insulation layer is insufficient to resist the tensile force of the film and environmental factors (such as temperature changes, vibration, etc.), resulting in weak adhesion. In addition, when extending the insulation layer from the larger surface to the smaller surface, stress concentration may occur at the edges of the insulation material. The insulation layer on the smaller surface is stretched by the insulation layer on the larger surface, causing the insulation layer to easily lift off on the smaller surface.
[0067] Therefore, the existing insulating layer covering the outer periphery of the battery has the problem of peeling edges.
[0068] Therefore, embodiments of this application provide a battery, a battery assembly, and an electrical device. The battery includes a battery body and a first insulating layer. The battery body has a first surface and a second surface, the area of the first surface being larger than the area of the second surface; the first insulating layer covers the second surface, and a portion of the first insulating layer extends to the first surface, covering at least a portion of the first surface. The battery provided in this application provides a strong adhesive foundation for the first insulating layer on the second surface by covering it. The partial extension of the first insulating layer to the first surface, covering a portion of the first surface, with the edge of the first insulating layer located on the first surface, reduces the pulling force of the first insulating layer on the second surface on the first insulating layer on the first surface, thus reducing the risk of the edge of the first insulating layer on the first surface lifting off. Since the area of the second surface is smaller than the area of the first surface, the pulling effect of the first insulating layer on the second surface on the first insulating layer on the first surface is mitigated.
[0069] In related technologies, the first insulating layer completely covers the first surface, and the overlap of the first insulating layer is located on the second surface. Under the pulling force of the first insulating layer on the first surface, the edge of the first insulating layer on the second surface is prone to lifting. However, in the battery provided by this application, the first insulating layer covers the second surface, increasing the coverage area of the first insulating layer on the second surface to effectively improve the connection stability of the first insulating layer. On the first surface, the first insulating layer covers at least a portion of the first surface, and the edge of the first insulating layer is located on the first surface. Since the area of the second surface is smaller than that of the first surface, the pulling force of the first insulating layer on the second surface on the first insulating layer on the first surface is smaller, thereby mitigating the pulling force of the first insulating layer on the second surface on the first insulating layer on the first surface and reducing the risk of the edge of the first insulating layer on the first surface lifting.
[0070] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0071] Firstly, referring to Figures 1 to 4 As shown, this application embodiment provides a battery, including:
[0072] The battery body 100 has a first surface 110 and a second surface 120, wherein the area of the first surface 110 is larger than the area of the second surface 120.
[0073] A first insulating layer 200 covers the second surface 120, and a portion of the first insulating layer 200 extends to the first surface 110, covering at least a portion of the first surface 110.
[0074] For example, a battery is the basic unit of an energy storage system, responsible for storing and releasing electrical energy. The battery body 100 includes a positive electrode, a negative electrode, an electrolyte, a separator, a current collector, and a casing. The positive and negative electrodes are the two main electrodes of the battery. For ease of explanation, a lithium-ion battery is used as an example. The positive and negative electrodes are responsible for the insertion and extraction of lithium ions, respectively. During discharge, lithium ions are extracted from the graphite of the negative electrode and move through the electrolyte to the positive electrode, such as lithium cobalt oxide. Simultaneously, electrons flow from the negative electrode to the positive electrode through an external circuit, providing current. During charging, lithium ions move from the positive electrode back to the negative electrode, and electrons flow from the positive electrode to the negative electrode through an external circuit.
[0075] The role of the electrolyte is to provide a medium for lithium ions to move between the positive and negative electrodes. In lithium-ion batteries, the electrolyte is typically a lithium salt dissolved in an organic solvent.
[0076] The separator is a porous polymer film located between the positive and negative electrodes. It allows ions to pass through but prevents direct contact between the electrodes, thus avoiding short circuits.
[0077] Current collectors are used to collect and conduct current. Positive current collectors are made of aluminum, while negative current collectors are made of copper.
[0078] The battery casing can be metal, providing physical protection and sealing. For example, the casing could be aluminum.
[0079] It is understood that the batteries provided in the embodiments of this application are not limited to lithium-ion batteries.
[0080] Since the area of the first surface 110 is larger than the area of the second surface 120, in order to avoid the first insulating layer 200, which completely covers the first surface 110 in the related art, pulling on the insulating layer covering the second surface 120 and causing the edge of the first insulating layer 200 to curl up, the battery provided in this application, during the process of covering the battery body 100 with the first insulating layer 200, first covers the smaller area of the second surface 120 with the first insulating layer 200, and then extends its outer edge to the larger area of the first surface 110, so as to ensure that the first insulating layer 200 obtains a stable initial adhesion on the smaller area of the second surface 120 and avoids the first insulating layer 200 curling up on the second surface 120.
[0081] By first covering the second surface 120 with the first insulating layer 200, the first insulating layer 200 gains a firm adhesion foundation on the second surface 120. Simultaneously, since the area of the second surface 120 is smaller than the area of the first surface 110, the pulling effect of the first insulating layer 200 on the second surface 120 on the first insulating layer 200 on the first surface 110 is reduced, decreasing the risk of the first insulating layer 200 on the first surface 110 lifting off.
[0082] Furthermore, since the first insulating layer 200 of the second surface 120 is not easily subjected to the tensile force from the first insulating layer 200 of the first surface 110, its stability under mechanical and environmental stress is enhanced.
[0083] In related technologies, the first insulating layer 200 completely covers the first surface 110, and the overlap of the first insulating layer 200 is located on the second surface 120. Under the pulling action of the first insulating layer 200 on the first surface 110, the edge of the first insulating layer 200 on the second surface 120 is prone to lifting. However, in the battery provided in this application embodiment, the first insulating layer 200 covers the second surface 120, increasing the coverage area of the first insulating layer 200 on the second surface 120, thereby effectively improving the connection stability of the first insulating layer 200 and preventing lifting. On the first surface 110, the first insulating layer 200 covers at least a portion of the first surface 110. The edge of the first insulating layer 200 is located on the first surface 110. Since the area of the second surface 120 is smaller than that of the first surface 110, the pulling effect of the first insulating layer 200 on the second surface 120 on the first insulating layer 200 on the first surface 110 is smaller. Therefore, the pulling effect of the first insulating layer 200 on the second surface 120 on the first insulating layer 200 on the first surface 110 is reduced, and the risk of the edge of the first insulating layer 200 on the first surface 110 is reduced.
[0084] The battery provided in this application embodiment optimizes the distribution of the first insulating layer 200 on different surfaces, ensuring that each surface is properly covered and adhered, avoiding the problem of the first insulating layer 200 peeling off, and improving the connection stability of the first insulating layer 200.
[0085] For example, the outer casing of the battery body 100 can be an aluminum casing. The exposed area of the first surface 110 accounts for 23% of the area of the first surface 110, meeting the high-altitude pressure resistance standard.
[0086] As one possible implementation, the area of the first surface 110 covered by the first insulating layer 200 forms a first region.
[0087] The area of the first surface 110 not covered by the first insulating layer 200 forms a second region.
[0088] For example, on the first surface 110, any portion covered by the first insulating layer 200 is defined as the first region. Any portion of the first surface not covered by the first insulating layer 200 belongs to the second region.
[0089] As one possible implementation, the first region is located on one side of the second region.
[0090] For example, when the first insulating layer 200 on the first surface 110 only covers the first region, the extension of the first insulating layer 200 on the first surface 110 is reduced, thereby reducing the tensile force caused by thermal expansion, mechanical stress, or other factors. This reduced tensile force helps to keep the first insulating layer 200 on the second surface 120 more secure, reducing the risk of warping or detachment.
[0091] As one possible implementation, the second region is located at the center of the first surface 110, and the first region is located at the edge of the first surface 110.
[0092] For example, when the first surface 110 is square, the second region can also be square, with the first region surrounding the second region. The first region is located at the edge of the first surface 110, and the edge region is susceptible to mechanical stress and environmental changes. By covering the first region with the first insulating layer 200, edge protection can be effectively enhanced, ensuring sufficient insulation support is provided in the area most in need of protection.
[0093] Reference Figure 1 As shown, the first direction is Figure 1 The direction shown in the middle X, the second direction is Figure 1 The direction shown in the middle Y-shape. The third direction is... Figure 1 The direction indicated by Z in the middle.
[0094] As one feasible implementation, there are two first surfaces 110, which are arranged opposite to each other along a first direction. When the battery has a square structure, the battery body 100 includes two oppositely arranged first surfaces 110, and this symmetrical arrangement of the first surfaces 110 helps to achieve balance in the mechanical structure of the battery.
[0095] As one possible implementation, the number of second surfaces 120 is at least two.
[0096] Along the second direction, the two second surfaces 120 are arranged opposite each other.
[0097] In some embodiments, the two second surfaces 120 are arranged opposite each other along a third direction.
[0098] The first direction, the second direction, and the third direction are all perpendicular to each other.
[0099] For example, by arranging opposing surfaces in three mutually perpendicular directions, the battery achieves three-dimensional symmetry. This symmetry helps improve the battery's mechanical stability. Surfaces arranged opposite each other in multiple directions can achieve a more uniform stress distribution, reducing localized stress concentrations, especially under conditions of thermal expansion or mechanical vibration. Uniform stress distribution helps reduce the likelihood of insulation warping or detachment, improving the overall structural reliability.
[0100] In some embodiments, the number of second surfaces 120 is four. Along a second direction, two second surfaces 120 are arranged opposite each other; along a third direction, two second surfaces 120 are arranged opposite each other.
[0101] As one feasible implementation, there are two first insulating layers 200, which are used to cover the two second surfaces 120 in a one-to-one correspondence, and a portion of the first insulating layer 200 extends to the first surface 110.
[0102] For example, a first insulating layer 200 is used to cover a second surface 120, and a portion of the first insulating layer 200 extends into the first surface 110. This design ensures that each second surface 120 has its own dedicated first insulating layer 200 covering it, while also having partial coverage on the first surface 110.
[0103] As one possible implementation, on the same first surface 110, the areas of the first surface 110 covered by two first insulating layers 200 respectively form two first regions.
[0104] For example, this means that each first insulating layer 200 has its own independent coverage area on the first surface 110, forming two distinct first regions.
[0105] As one feasible implementation, along the second direction, there is a gap between the two first regions, and the gap forms a second region.
[0106] There is a gap between the two first regions, which is called the second region. This means that in the second direction, there is no overlap between the areas covered by the two first insulating layers 200, leaving an uncovered area. This reduces the coverage area of the first insulating layer 200 on the first surface 110, which indirectly increases the coverage area of the first insulating layer 200 on the second surface 120, thereby effectively improving the connection stability of the first insulating layer 200.
[0107] On the first surface 110, there is a gap between the two first regions. The edge of the first insulating layer 200 is located on the first surface 110. Since the area of the second surface 120 is smaller than that of the first surface 110, the pulling effect of the first insulating layer 200 on the second surface 120 on the first insulating layer 200 on the first surface 110 is smaller. Therefore, the pulling effect of the first insulating layer 200 on the second surface 120 on the first insulating layer 200 on the first surface 110 is reduced, and the risk of the edge of the first insulating layer 200 on the first surface 110 is reduced.
[0108] In some embodiments, along a third direction, there is a gap between the two first regions, and the gap forms a second region.
[0109] Similarly, in the third direction, by setting a gap between the two first regions, the coverage area of the first insulating layer 200 on the first surface 110 is reduced, which indirectly increases the coverage area of the first insulating layer 200 on the second surface 120, thereby effectively improving the connection stability of the first insulating layer 200. The indirectly increased coverage area of the first insulating layer 200 on the second surface 120 means that more of the first insulating layer 200 directly covers this smaller area of the second surface 120. Since the second surface 120 has a smaller area, increasing its coverage area helps to provide greater adhesion and better mechanical stability.
[0110] On the first surface 110, there is a gap between the two first regions. The edge of the first insulating layer 200 is located on the first surface 110. Since the area of the second surface 120 is smaller than that of the first surface 110, the pulling effect of the first insulating layer 200 on the second surface 120 on the first insulating layer 200 on the first surface 110 is smaller. Therefore, the pulling effect of the first insulating layer 200 on the second surface 120 on the first insulating layer 200 on the first surface 110 is reduced, and the risk of the edge of the first insulating layer 200 on the first surface 110 is reduced.
[0111] In one possible implementation, the second surface 120 includes two first sub-surfaces 121, which are disposed opposite to each other along a second direction; the first direction and the second direction are perpendicular.
[0112] The first sub-surface 121 is positioned relatively close to the first area relative to the second area.
[0113] For example, since the first sub-surface 121 is close to the first region, which is the edge region of the first surface 110, the edge region is usually a region of stress concentration and greater environmental influence. By covering this region with the first insulating layer 200, the impact of mechanical stress and environmental changes on the battery can be effectively reduced.
[0114] During the process of covering the battery body 100 with the first insulating layer 200, the first insulating layer 200 is first covered on the first sub-surface 121, ensuring that the first insulating layer 200 obtains a firm initial adhesion on the first sub-surface 121. This firm initial adhesion provides a stable foundation for subsequent extended coverage and reduces displacement or loosening of the first insulating layer 200.
[0115] Since the first insulating layer 200 has already achieved a firm adhesion on the first sub-surface 121, the first insulating layer 200 extending into the first region will not exert excessive tensile force on the first insulating layer 200 of the first sub-surface 121. This design effectively avoids stress concentration and tensile effects that may occur due to large-area coverage.
[0116] By optimizing the coverage sequence and strategy of the first insulating layer 200, the risk of edge warping due to stress concentration is effectively reduced. By initially covering the first insulating layer 200 on the first sub-surface 121 and extending the first insulating layer 200 to the first region, a more uniform stress distribution of the first insulating layer 200 is achieved. This uniform stress distribution helps improve the overall structural stability and durability of the battery.
[0117] As one possible implementation, the second surface 120 includes two second sub-surfaces 122, which are disposed opposite to each other along a third direction.
[0118] The second sub-surface 122 is connected to the first sub-surface 121; the second sub-surface 122 is positioned closer to the first region than the second region.
[0119] The first direction, the second direction, and the third direction are all perpendicular to each other.
[0120] For example, since the second sub-surface 122 is close to the first region, which is the edge region of the first surface 110, the edge region is usually a region of stress concentration and greater environmental influence. By covering this region with the first insulating layer 200, the impact of mechanical stress and environmental changes on the battery can be effectively reduced.
[0121] During the process of covering the battery body 100 with the first insulating layer 200, the first insulating layer 200 is first covered onto the second sub-surface 122, ensuring that the first insulating layer 200 achieves a firm initial adhesion to the second sub-surface 122. This firm initial adhesion provides a stable foundation for subsequent extended coverage, reducing displacement or loosening of the first insulating layer 200.
[0122] Since the first insulating layer 200 has achieved a firm adhesion to the second sub-surface 122, the first insulating layer 200 extending into the first region will not exert excessive tensile force on the first insulating layer 200 of the second sub-surface 122. This design effectively avoids stress concentration and tensile forces that may occur due to large-area coverage.
[0123] By optimizing the coverage sequence and strategy of the first insulating layer 200, the risk of edge warping due to stress concentration is effectively reduced. By initially covering the first insulating layer 200 on the second sub-surface 122 and extending the first insulating layer 200 into the first region, a more uniform stress distribution of the first insulating layer 200 is achieved. This uniform stress distribution contributes to improving the overall structural stability and durability of the battery.
[0124] When the battery body 100 is square, it has two large surfaces and four small surfaces. Along a first direction, the two large surfaces are spaced apart, forming the first surface 110. Along a second direction, the two small surfaces are positioned opposite each other, forming the first sub-surface 121. Along a third direction, two more small surfaces are positioned opposite each other, forming the second sub-surface 122, which is used to lead out the terminal posts. (Refer to...) Figure 3 and Figure 4 The surface area of the first sub-surface 121 is greater than the surface area of the second sub-surface 122.
[0125] As one feasible implementation method, refer to Figure 4 and Figure 5 As shown, the first insulating layer 200 includes a first sub-insulating layer, which includes a first segment 210 and a second segment 220 that are connected to each other. The first segment 210 covers the first sub-surface 121, and the second segment 220 covers the first region.
[0126] For example, the first segment 210 covers the first sub-surface 121, providing a strong initial adhesion base and supporting the stability of the entire first insulating layer 200.
[0127] Since the first region is located at the edge of the first surface 110, it is susceptible to mechanical stress and environmental changes. By specifically covering the first region with the second segment 220, the second segment 220 provides additional protection for the first region.
[0128] By interconnecting the first segment 210 and the second segment 220 to form a continuous first insulating layer 200, the overall structural integrity of the first insulating layer 200 is enhanced. This continuity helps reduce interlayer interface stress, improves the durability of the first insulating layer 200, reduces potential interface defects and delamination problems, ensures more stable electrical and mechanical properties, and provides a continuous electrical insulation path, reducing the risk of short circuits and other electrical faults.
[0129] Since the first segment 210 and the second segment 220 are interconnected, any stress generated in the first region can be more evenly distributed to the first sub-surface 121. This uniform stress distribution helps reduce local stress concentration, lowering the risk of warping and tearing. By optimizing the stress transmission path, the risk of warping due to stress concentration is effectively reduced, especially in edge regions.
[0130] For example, in addition to having two first surfaces 110, there are two second segments 220. The two second segments 220 are respectively connected to the two ends of the first segment 210. The two second segments 220 are respectively located on the two first surfaces 110.
[0131] In one possible implementation, the first insulating layer 200 further includes a second sub-insulating layer, which includes a third segment 230 and a fourth segment 240 that are interconnected; the third segment 230 covers the second sub-surface 122; and the fourth segment 240 covers the first region.
[0132] For example, the third segment 230 covers the second sub-surface 122, providing a strong initial adhesion base and supporting the stability of the entire first insulation layer 200. Since the first region is located at the edge of the first surface 110, it is susceptible to mechanical stress and environmental changes. By specifically covering the first region with the fourth segment 240, additional protection is provided.
[0133] By interconnecting the third segment 230 and the fourth segment 240 to form a continuous first insulating layer 200, the overall structural integrity of the first insulating layer 200 is enhanced. This continuity helps reduce interlayer interface stress and improves the durability of the first insulating layer 200. The segments of the first insulating layer 200 provide a continuous electrical insulation path, reducing the risk of short circuits and other electrical faults.
[0134] Since the third segment 230 and the fourth segment 240 are interconnected, any stress generated in the first region can be more evenly distributed to the second sub-surface 122. This uniform stress distribution helps reduce local stress concentration, lowering the risk of warping and tearing. By optimizing the stress transmission path, the risk of warping due to stress concentration is effectively reduced.
[0135] For example, in addition to having two first surfaces 110, there are two fourth segments 240. The two fourth segments 240 are respectively connected to the two ends of the third segment 230. The two fourth segments 240 are respectively located on the two first surfaces 110.
[0136] As one possible implementation, a first insulating layer 200 covering the first sub-surface 121 extends to the first surface 110 to form a second segment 220.
[0137] Two first insulating layers 200 cover the second segment 220 of the same first surface 110 and are spaced apart along the second direction.
[0138] For example, by extending the first insulating layer 200 from the first sub-surface 121 to the first surface 110 to form a second segment 220, additional edge protection is provided. This extended coverage helps reduce mechanical stress and environmental impact in the edge region.
[0139] In related technologies, the first surface 110 is completely covered by the first insulating layer 200. This causes the first insulating layer 200 on the first surface 110 to pull on the first insulating layer 200 on the second surface 120, resulting in the first insulating layer 200 on the second surface warping. In this embodiment, the second segments 220 on the first surface 110 are spaced apart. That is, the second segments 220 cover a portion of the first surface 110, and the edges of the second segments 220 are on the first surface 110. Since the area of the second surface 120 is smaller than that of the first surface 110, the pulling effect of the first segment 210 on the second segment 220 on the first surface 110 is smaller. Therefore, the pulling effect of the first segment 210 on the second surface 120 on the second segment 220 on the first surface 110 is reduced, thus reducing the risk of the first insulating layer 200 on the first surface 110 warping.
[0140] By reducing tensile forces, the first insulating layer 200 on the first surface 110 can maintain a more stable adhesion, reducing the risk of displacement and warping. This stability is crucial for maintaining the long-term reliability of the battery.
[0141] As one possible implementation, the first insulating layer 200 covering the second sub-surface 122 extends to the first surface 110 to form the fourth segment 240.
[0142] Two first insulating layers 200 cover the fourth segment 240 of the same first surface 110 and are spaced apart along a third direction.
[0143] For example, by extending the first insulating layer 200 from the second sub-surface 122 to the first surface 110 to form a fourth segment 240, additional edge protection is provided. This extended coverage helps reduce mechanical stress and environmental impact in the edge region.
[0144] In related technologies, the first surface 110 is completely covered by the first insulating layer 200. This causes the first insulating layer 200 on the first surface 110 to pull on the first insulating layer 200 on the second surface 120, resulting in the first insulating layer 200 warping at the edge. In this embodiment, the fourth segment 240 on the first surface 110 is spaced apart. That is, the fourth segment 240 covers a portion of the first surface 110, and the edge of the fourth segment 240 is located on the first surface 110. Since the area of the second surface 120 is smaller than that of the first surface 110, the pulling effect of the third segment 230 on the second surface 120 on the fourth segment 240 on the first surface 110 is smaller. Therefore, the pulling effect of the third segment 230 on the second surface 120 on the fourth segment 240 on the first surface 110 is reduced, thus reducing the risk of the first insulating layer 200 on the first surface 110 warping at the edge.
[0145] By reducing tensile forces, the first insulating layer 200 on the first surface 110 can maintain a more stable adhesion, reducing the risk of displacement and warping. This stability is crucial for maintaining the long-term reliability of the battery.
[0146] As one feasible implementation method, refer to Figure 4 and Figure 5 As shown, the second segment 220 and the fourth segment 240 are stacked on the same first surface 110.
[0147] For example, by stacking the second segment 220 and the fourth segment 240, the edge area gains additional coverage and protection, reducing mechanical stress and environmental impact on the edge area. Simultaneously, in situations where the edge area is susceptible to external stress, multi-layer coverage helps reduce the risk of edge warping.
[0148] Furthermore, by stacking the second segment 220 and the fourth segment 240 on the same surface, multi-layer insulation protection is provided. This multi-layer structure can effectively improve electrical insulation performance and reduce the risk of short circuits and other electrical faults.
[0149] As one possible implementation, the material of the first insulating layer 200 includes polyethylene terephthalate or polyimide.
[0150] In some embodiments, the material of the first insulating layer 200 comprises polyethylene terephthalate (PET). PET has electrical insulating properties, including a low dielectric constant and a high breakdown voltage.
[0151] In addition, polyethylene terephthalate (PET) materials have high mechanical strength and wear resistance, and can withstand external mechanical stress and wear.
[0152] In other embodiments, the first insulating layer 200 is made of polyimide. Polyimide has electrical insulating properties, including high dielectric strength and low dielectric loss. In addition to high mechanical strength, polyimide also has good flexibility, enabling it to adapt to complex shapes and structures.
[0153] As one feasible implementation method, refer to Figure 6 As shown, the battery also includes a second insulating layer 300, which is disposed on the first surface 110, covers the second region, and covers at least a portion of the first insulating layer 200 located on the first surface 110.
[0154] For example, by providing a second insulating layer 300 in the second region of the first surface 110 and a first insulating layer 200 in the first region of the first surface 110 and the second surface 120, the entire surface of the battery body 100 is fully insulated. This comprehensive coverage effectively prevents electrical leakage and ensures the safety and reliability of the battery.
[0155] By using different insulation layers in different areas, a multi-layered insulation structure is formed. This structure significantly improves the overall electrical insulation performance of the battery body 100 and reduces the risk of short circuits and other electrical faults.
[0156] The second insulating layer 300 covers the portion of the first insulating layer 200 of the battery that extends to the first surface 110.
[0157] For example, the second insulating layer 300 covers and extends into a portion of the first surface 110, providing additional physical coverage. This multi-layered coverage helps increase the weight and thickness of the edge area, thereby reducing the risk of edge warping.
[0158] By adding a second insulating layer 300 on top of the first insulating layer 200, the adhesion between materials can be improved. This enhanced adhesion helps prevent delamination and curling at edges, ensuring the stability of the material during long-term use.
[0159] The extended coverage of the second insulating layer 300 provides a smooth transition interface, reducing stress concentration at the interface. This smooth transition helps improve interface stability and prevents material delamination or fracture.
[0160] The overlap between the second insulating layer 300 and the first insulating layer 200 is located on the first surface 110. The overlap is far from the junction of the first surface 110 and the second surface 120. In this way, the first insulating layer 200 is less likely to lift or wrinkle at the edges.
[0161] For example, the second region of the first surface of the battery body 100 has a length of 1400 mm and a width of 54 mm. The second insulating layer 300 covering the first surface 110 has a length of 1500 mm and a width of 200 mm.
[0162] As one possible implementation, the second insulating layer 300 comprises glass fiber gel or ceramic fiber gel.
[0163] In some embodiments, the second insulating layer 300 comprises glass fiber gel. The glass fiber gel possesses electrical insulation properties, effectively preventing electrical leakage and ensuring battery safety. Simultaneously, the glass fiber gel exhibits high mechanical strength, effectively resisting external impacts and mechanical stress. This property helps reduce the risk of warping and delamination. Furthermore, the glass fiber gel possesses thermal stability, maintaining its physical properties in high-temperature environments. This helps maintain the stability of the connection under thermal cycling conditions.
[0164] In other embodiments, the second insulating layer 300 comprises ceramic fiber gel. Ceramic fiber gel can withstand extremely high temperatures, making it suitable for use in high-temperature environments. This property ensures bonding stability under extreme conditions. Ceramic fiber gel exhibits high resistance to chemicals, maintaining its performance in corrosive environments and providing additional protection. Ceramic fiber gel also possesses high mechanical strength, effectively resisting mechanical stress and reducing the risk of warping and delamination. The low coefficient of thermal expansion of ceramic fiber materials helps maintain structural integrity during temperature changes, reducing interfacial stress.
[0165] Secondly, referring to Figure 7 As shown, this application embodiment provides a battery assembly, including:
[0166] At least two batteries.
[0167] The battery components can be either battery modules or battery clusters.
[0168] It is understood that since the battery component of this application adopts the battery technology solution of the above embodiments, it has at least the beneficial effects brought about by the technical solution of the above embodiments, which will not be elaborated here.
[0169] As one feasible implementation, at least two batteries are stacked along the first direction.
[0170] For example, at least two batteries are stacked along a first direction. This stacked structure can improve the energy density and capacity of the battery assembly.
[0171] As one possible implementation, the battery assembly also includes a second insulating layer 300 located between adjacent batteries.
[0172] For example, the second insulating layer 300 is located between adjacent batteries. The second insulating layer 300 provides effective electrical isolation between adjacent batteries, preventing short circuits or electrical interference between them. Simultaneously, the second insulating layer 300 not only provides electrical isolation but also absorbs mechanical stress, protecting the batteries from physical damage.
[0173] Thirdly, referring to Figures 8 to 10 As shown, this application provides a battery assembly including multiple battery subgroups stacked along a first direction; each battery subgroup includes at least two stacked batteries.
[0174] The battery assembly can be a battery module or a battery cluster. A battery sub-group consists of multiple batteries bundled together.
[0175] As one possible implementation, the battery assembly also includes a separator 400 disposed between adjacent cells of the battery sub-group.
[0176] For example, the separator 400 can help distribute heat evenly, avoid localized overheating, and improve the thermal management efficiency of the entire battery assembly. The separator 400 helps disperse mechanical stress, reducing material fatigue and damage caused by external pressure or vibration.
[0177] For example, the separator 400 can be foam or a separator pad.
[0178] As one possible implementation, the battery assembly also includes a second insulating layer 300 located between adjacent battery sub-groups.
[0179] By way of example, a multi-layered insulation structure is formed by incorporating a second insulating layer 300 between the battery sub-groups. This structure significantly improves the overall electrical insulation performance of the battery assembly, reducing the risk of short circuits and other electrical faults. The second insulating layer 300 helps to provide electrical isolation between the battery sub-groups. By stacking the battery sub-groups and the second insulating layer 300, a compact and stable structure is formed. This structure helps to improve the mechanical strength of the battery assembly and resist external shocks and vibrations.
[0180] Reference Figure 8As shown, the battery sub-pack includes two batteries; a separator 400 is disposed between adjacent batteries of the battery sub-pack; and a battery sub-pack is disposed between adjacent second insulating layers 300.
[0181] Reference Figure 9 As shown, the battery sub-pack includes three batteries; a separator 400 is disposed between adjacent batteries of the battery sub-pack; and a battery sub-pack is disposed between adjacent second insulating layers 300.
[0182] Fourthly, embodiments of this application provide an electrical device, including a battery or battery assembly.
[0183] It is understood that since the electrical equipment of this application adopts the technical solution of the battery or battery module of the above embodiments, it has at least the beneficial effects brought about by the technical solution of the battery or battery module of the above embodiments, which will not be elaborated here.
[0184] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0185] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A battery, characterized in that, include: The battery body (100) has a first surface (110) and a second surface (120), wherein the area of the first surface (110) is larger than the area of the second surface (120); A first insulating layer (200) covers the second surface (120), and a portion of the first insulating layer (200) extends to the first surface (110), covering at least a portion of the first surface (110).
2. The battery according to claim 1, characterized in that, The area of the first surface (110) covered by the first insulating layer (200) forms a first region; The area of the first surface (110) not covered by the first insulating layer (200) forms a second region.
3. The battery according to claim 2, characterized in that, The first area is located on one side of the second area.
4. The battery according to claim 2, characterized in that, The second region is located at the center of the first surface (110), and the first region is located at the edge of the first surface (110).
5. The battery according to claim 4, characterized in that, The number of the first surfaces (110) is two, and the two first surfaces (110) are arranged opposite each other along the first direction.
6. The battery according to claim 5, characterized in that, The number of the second surface (120) is at least two; Along a second direction, the two second surfaces (120) are arranged opposite each other; and / or, along a third direction, the two second surfaces (120) are arranged opposite each other; The first direction, the second direction, and the third direction are perpendicular to each other.
7. The battery according to claim 6, characterized in that, There are two first insulating layers (200), and the two first insulating layers (200) are used to cover the two second surfaces (120) in a one-to-one correspondence.
8. The battery according to claim 7, characterized in that, On the same first surface (110), the areas of the first surface (110) covered by the two first insulating layers (200) respectively form two first regions.
9. The battery according to claim 8, characterized in that, Along the second direction, there is a gap between the two first regions, and the gap forms the second region; And / or, along the third direction, there is a gap between the two first regions, the gap forming the second region.
10. The battery according to claim 6, characterized in that, The second surface (120) includes two first sub-surfaces (121) arranged opposite to each other along a second direction; the first direction and the second direction are perpendicular. The first sub-surface (121) is positioned relative to the second region and close to the first region.
11. The battery according to claim 10, characterized in that, The second surface (120) includes two second sub-surfaces (122) arranged opposite to each other along a third direction; The second sub-surface (122) is connected to the first sub-surface (121); the second sub-surface (122) is disposed relative to the second region and close to the first region; The first direction, the second direction, and the third direction are perpendicular to each other.
12. The battery according to claim 11, characterized in that, The first insulating layer (200) includes a first sub-insulating layer, which includes a first segment (210) and a second segment (220) connected to each other. The first segment (210) covers the first sub-surface (121), and the second segment (220) covers the first area.
13. The battery according to claim 12, characterized in that, The first insulating layer (200) further includes a second sub-insulating layer, which includes a third segment (230) and a fourth segment (240) connected to each other; the third segment (230) covers the second sub-surface (122); and the fourth segment (240) covers the first region.
14. The battery according to claim 13, characterized in that, The first insulating layer (200) covering the first sub-surface (121) extends to the first surface (110) to form the second segment (220). Two first insulating layers (200) cover the second segment (220) of the same first surface (110) and are spaced apart along the second direction.
15. The battery according to claim 14, characterized in that, The first insulating layer (200) covering the second sub-surface (122) extends to the first surface (110) to form the fourth segment (240). Two first insulating layers (200) cover the fourth segment (240) on the same first surface (110) and are spaced apart along a third direction.
16. The battery according to claim 15, characterized in that, On the same first surface (110), the second segment (220) and the fourth segment (240) are stacked.
17. The battery according to any one of claims 1-16, characterized in that, The material of the first insulating layer (200) includes polyethylene terephthalate or polyimide.
18. The battery according to any one of claims 6-16, characterized in that, It also includes a second insulating layer (300) disposed on the first surface (110), the second insulating layer (300) covering the second region, and the second insulating layer (300) covering at least a portion of the first insulating layer (200) located on the first surface (110).
19. The battery according to claim 18, characterized in that, The second insulating layer (300) comprises glass fiber gel or ceramic fiber gel.
20. A battery assembly, characterized in that, include: At least two batteries according to any one of claims 1-17.
21. The battery assembly according to claim 20, characterized in that, Along the first direction, at least two of the batteries are stacked.
22. The battery assembly according to claim 21, characterized in that, It also includes a second insulating layer (300) located between adjacent batteries.
23. A battery assembly, characterized in that, include: Multiple battery sub-groups are stacked along a first direction; each battery sub-group includes at least two stacked batteries, wherein the batteries are any one of claims 1-17.
24. The battery assembly according to claim 23, characterized in that, It also includes a separator (400) disposed between adjacent batteries of the battery subgroup.
25. The battery assembly according to claim 23, characterized in that, It also includes a second insulating layer (300) located between adjacent battery sub-groups.
26. An electrical appliance, characterized in that, Includes the battery according to any one of claims 1-19, or the battery assembly according to claim 20 or 23.