Power battery and electric equipment

Abstract

The embodiment of the utility model provides a power battery and electric equipment, and belongs to the technical field of power batteries. The power battery comprises: an accommodating frame having an accommodating cavity; the protection plate assembly is connected with the containing frame so as to support the containing frame; the battery cell group is arranged in the accommodating cavity; and the reinforcing layer is arranged on the battery cell group, and at least part of the reinforcing layer faces the protective plate assembly. The protection performance of the side, facing the protection plate assembly, of the battery cell set is improved, and the overall structure of the power battery is kept compact.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a power battery and electrical equipment. Background Technology

[0002] Power batteries serve as a power source for electrical devices, making safety paramount.

[0003] The power battery includes a housing frame, a protective plate assembly, and a cell pack. The protective plate assembly is located at the bottom of the housing frame, and the cell pack is located inside the housing frame. The bottom of each cell in the cell pack is connected to the protective plate assembly, so that the protective plate assembly protects the cell pack.

[0004] However, existing power batteries have relatively weak impact resistance. Utility Model Content

[0005] This application provides a power battery and electrical equipment to improve the impact resistance of the power battery.

[0006] In a first aspect, embodiments of this application provide a power battery, comprising:

[0007] A receiving frame, which encloses a receiving cavity;

[0008] A protective panel assembly, which is connected to the receiving frame to support the receiving frame;

[0009] The battery cell assembly is disposed within the receiving cavity;

[0010] A reinforcing layer is disposed on the cell assembly, and at least a portion of the reinforcing layer faces the protective plate assembly.

[0011] In one possible implementation, the power battery provided in this application embodiment includes a battery cell pack comprising a plurality of battery cells, each battery cell including a core shell and a core body disposed within the core shell, the core shell being connected to the reinforcing layer at least on one side facing the protective plate assembly.

[0012] In one possible implementation, the power battery provided in this application further includes an insulating film on at least a portion of the periphery of the core shell, and the insulating film is adjacent to the reinforcing layer.

[0013] In one possible implementation, the power battery provided in this application embodiment has the reinforcing layer disposed on at least a portion of the periphery of the core shell.

[0014] In one possible implementation, the power battery provided in this application embodiment has a reinforcing layer thickness that is less than or equal to the core shell thickness.

[0015] In one possible implementation, the power battery provided in this application embodiment has a reinforcing layer that is a cured coating.

[0016] In one possible implementation, the power battery provided in this application embodiment has a cured coating comprising at least one of a polyurea layer, a polyurethane layer, or an epoxy resin layer.

[0017] In one possible implementation, the power battery provided in this application embodiment further includes an adhesive layer, which bonds the reinforcing layer and the protective plate assembly.

[0018] In one possible implementation, the power battery provided in this application embodiment includes a protective plate assembly comprising:

[0019] A heat sink is disposed at the bottom of the receiving frame and connected to the reinforcing layer;

[0020] A bottom protective plate is disposed on the side of the heat sink away from the receiving frame and is connected to the receiving frame;

[0021] A buffer layer is sandwiched between the heat sink and the bottom protective plate.

[0022] Secondly, embodiments of this application provide an electrical device, including a device body and any of the aforementioned power batteries connected to the device body.

[0023] The power battery and electrical equipment provided in this application embodiment have a protective plate assembly on one side of the housing frame, and a cell assembly is arranged within the housing cavity of the housing frame. A reinforcing layer is provided on the side of the cell assembly facing the protective plate assembly and connected to the cell assembly, and further connected to the protective plate assembly. Because the reinforcing layer has stronger impact resistance, it forms impact protection on the side of the cell assembly facing the protective plate assembly, thereby improving the strength and impact resistance of the cell assembly facing the protective plate assembly. This also eliminates the need for a window structure on the side of the cell assembly facing the protective plate assembly, making the power battery structure simple and compact. Furthermore, the reinforcing layer enables a stable connection between the cell assembly and the adhesive layer, further connecting it to the protective plate assembly, ensuring the reliability of the cell assembly assembly. This improves the protective performance of the cell assembly on the side facing the protective plate assembly without adjusting the protective plate assembly structure, and maintains a compact overall power battery structure. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the structure of the power battery provided in the embodiments of this application;

[0026] Figure 2 for Figure 1 Partial structural diagram;

[0027] Figure 3 for Figure 2 A structural diagram from another perspective;

[0028] Figure 4 for Figure 1 A schematic diagram of the cell structure of the battery cell assembly.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 - Receiving frame; 110 - Receiving cavity;

[0031] 200 - Protective plate assembly; 210 - Heat sink; 220 - Bottom protective plate; 230 - Buffer layer;

[0032] 300 - Cell assembly; 310 - Cell; 311 - Core casing; 312 - Insulating film;

[0033] 400 - Reinforcement layer;

[0034] 500 - Adhesive layer.

[0035] 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

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the absence of conflict, the following embodiments and features can be combined with each other.

[0037] Power batteries, such as moduleless CTP (Cell To Pack) batteries, include a housing frame, a protective plate assembly, and a cell assembly. The protective plate assembly is located at the bottom of the housing frame, and the cell assembly is located inside the housing frame. The bottom of each cell in the cell assembly is connected to the protective plate assembly, so that the protective plate assembly protects the cell assembly.

[0038] In CTP battery assembly, multiple cells are usually assembled directly into the battery housing frame, eliminating the need to assemble the cells into battery modules. This simplifies the battery structure, but it also means that the power battery lacks protection for the cells at the battery module level, which reduces the impact resistance of the cells and even the power battery.

[0039] Furthermore, during CTP battery assembly, the cells and protective plate assemblies need to be reliably bonded using structural adhesive, especially ensuring a stable connection between the cells and the heat sink in the protective plate assembly for heat dissipation. To improve the reliability of the bond between the cells and the protective plate assembly, window structures are created on the side of each cell facing the protective plate assembly. When multiple cells form a cell assembly, this creates multiple recessed window structures on the side of the cell assembly facing the protective plate assembly, improving the bonding stability of the subsequent structural adhesive and ensuring reliable bonding. However, creating window structures on the cells not only increases the possibility of insulation failure but also further reduces the impact resistance of the cells and even the entire battery. When the battery faces an impact, the protective plate assembly is insufficient to protect the cells, causing them to deform, crack, or even catch fire.

[0040] In response, improving the structure of the protective plate assembly to enhance its strength and thus ensure the impact resistance of the battery cells and power batteries would easily lead to increased power battery costs and a more complex structure. Furthermore, while using a thick layer of structural adhesive reduces the probability of insulation failure in the battery cells, it does little to improve the impact resistance of the battery cells and power batteries.

[0041] Therefore, the impact resistance of existing power batteries is relatively weak. It is necessary to improve the impact resistance of power batteries while ensuring a reliable connection between the cells and the protective plate assembly and a compact power battery structure.

[0042] In order to overcome the shortcomings of existing technologies,

[0043] The power battery and electrical device provided in this application embodiment have a protective plate assembly on one side of the housing frame, and a cell assembly is arranged within the housing cavity of the housing frame. A reinforcing layer is provided on the side of the cell assembly facing the protective plate assembly and is connected to the cell assembly and the protective plate assembly. Because the reinforcing layer has stronger impact resistance, it forms impact protection on the side of the cell assembly facing the protective plate assembly, thereby improving the strength and impact resistance of the cell assembly facing the protective plate assembly. This also eliminates the need for a window structure on the side of the cell assembly facing the protective plate assembly, making the power battery structure simple and compact.

[0044] Furthermore, a stable connection between the cell assembly and the adhesive layer can be achieved through a reinforcing layer, which can then be connected to the protective plate assembly to ensure the reliability of the cell assembly assembly. This improves the protection performance of the cell assembly on the side facing the protective plate assembly without adjusting the structure of the protective plate assembly, and keeps the overall structure of the power battery compact.

[0045] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the present invention.

[0046] Reference Figures 1 to 4 As shown, this application embodiment provides a power battery, including:

[0047] The receiving frame 100 encloses and forms the receiving cavity 110;

[0048] A protective panel assembly 200 is connected to a receiving frame 100 to support the receiving frame 100.

[0049] The battery cell assembly 300 is disposed within the receiving cavity 110;

[0050] A reinforcing layer 400 is disposed on the cell assembly 300, and at least a portion of the reinforcing layer 400 faces the protective plate assembly 200.

[0051] It is understood that the power battery provided in this application embodiment is illustrated using a CTP battery as an example, but the power battery structure provided in this application embodiment is not limited to this.

[0052] The power battery includes a housing frame 100, which encloses a housing cavity 110. The housing frame 100 has four consecutive adjacent closed sides forming corresponding housing cavities 110, while the remaining opposite sides are open, allowing the housing cavities 110 to open on these opposite sides for easy assembly of the cell assembly 300 and other electrical components. This allows the housing cavity 110 to accommodate both the cell assembly 300 and other electrical components of the power battery. A protective plate assembly 200 is provided on one side of the housing cavity 110 opening to close the opening and provide mounting support and impact protection for the cell assembly 300. A cover plate (not shown) may also be provided on the other side of the housing cavity 110 opening to seal the housing cavity 110 after the cell assembly 300 and electrical components are assembled inside, completing the power battery encapsulation.

[0053] The cell pack 300 includes multiple cells 310, which are assembled in a group within the receiving cavity 110. For example, in a CTP battery, the multiple cells 310 are directly assembled in a group within the receiving cavity 110 without forming a battery module structure. However, in a conventional power battery, the multiple cells 310 can be connected and grouped to form a battery module, which is then assembled within the receiving cavity 110 of the receiving frame 100. This application does not impose any limitations on this.

[0054] A reinforcing layer 400 can be provided on the side of the battery cell 310 facing the protective plate assembly 200. The reinforcing layer 400 is fixedly connected to the battery cell 310. Subsequently, the battery cells 310 can be grouped to form a battery cell assembly 300, so that the reinforcing layers 400 on each battery cell 310 are all located on the same side of the battery cell assembly 300, so that the reinforcing layers 400 are connected to the protective plate assembly 200, thus completing the installation of the battery cell assembly 300. In this way, the reinforcing layer 400 is added to the battery cell assembly 300, which can form impact protection on the side of the battery cell assembly 300 facing the protective plate assembly 200, and form impact protection at the level of the battery cell 310.

[0055] Therefore, in the power battery provided in this application embodiment, a protective plate assembly 200 is provided on one side of the receiving frame 100, and a cell assembly 300 is provided in the receiving cavity 110 of the receiving frame 100. A reinforcing layer 400 is provided on the side of the cell assembly 300 facing the protective plate assembly 200 so that the reinforcing layer 400 is connected to the cell 310 and the reinforcing layer 400 is connected to the protective plate assembly 200.

[0056] Because the reinforcing layer 400 has stronger impact resistance, it forms impact protection on the side of the cell 310 facing the protective plate assembly 200. The reinforcing layer 400 improves the strength and impact resistance of the cell assembly 300 on the side facing the protective plate assembly 200. It also eliminates the need for a window structure on the side of the cell 310 facing the protective plate assembly 200, resulting in a simpler and more compact power battery structure.

[0057] Furthermore, the reinforcing layer 400 can also achieve a stable connection between the cell assembly 300 and the protective plate assembly 200, ensuring the reliability of the cell assembly 300 assembly. This improves the protection performance of the cell assembly 300 on the side facing the protective plate assembly 200 without adjusting the structure of the protective plate assembly 200, and maintains a compact overall structure of the power battery. The reinforcing layer 400 also enhances the strength of the cell assembly 300 on the side facing the protective plate assembly 200, improving its impact resistance without requiring adjustments to the structure of the protective plate assembly 200, and maintaining a compact overall structure of the power battery.

[0058] Furthermore, in some embodiments, reference is made to... Figure 3 and Figure 4As shown, the battery cell assembly 300 includes a plurality of battery cells 310. Each battery cell 310 includes a core shell 311 and a core body disposed within the core shell 311. The core shell 311 is connected to the reinforcing layer 400 at least on the side facing the protective plate assembly 200.

[0059] It is understandable that the core shell 311 generally adopts an aluminum shell structure to facilitate heat conduction. The core body is set inside the aluminum shell structure. The specific structure of the core body may include tabs, diaphragms, electrodes and electrolyte. The tabs are stacked or wound inside the core shell 311. The diaphragm is located between two adjacent tabs to separate adjacent tabs. Positive and negative electrodes are set on the core shell 311 and connected to the tabs. The electrolyte fills the core shell 311.

[0060] By directly laying the reinforcing layer 400 on the side of the core shell 311 facing the protective plate assembly 200, and connecting the reinforcing layer 400 to the protective plate assembly 200, the protective performance is better. Furthermore, this arrangement eliminates the need for a window structure on the side of the cell 310 facing the protective plate assembly 200, and also eliminates the need to increase the thickness of the structural adhesive to reduce the possibility of insulation failure of the cell 310, making the structure of the power battery simple and compact.

[0061] Furthermore, referring to Figure 4 As shown, the battery cell 310 also includes an insulating film 312, which is disposed on at least a portion of the periphery of the core shell 311 and is adjacent to the reinforcing layer 400.

[0062] An insulating film 312 covers the outside of the core shell 311 so that the insulating film 312 insulates and isolates the periphery of the core shell 311 from the outside, ensuring the insulation performance of the periphery of the cell 310. The insulating film 312 can be a PET blue film (polyethylene terephthalate film) or a UV varnish film (ultraviolet light curing paint film).

[0063] Furthermore, in some embodiments, to further improve the reliability of the connection between the battery cell 310 and the reinforcing layer 400, the insulating film 312 can cover the side of the core shell 311 facing the protective plate assembly 200, and a window portion can be provided on the insulating film 312. When multiple battery cell groups 300 are assembled into a battery cell group 300, multiple window portion structures with recesses relative to the surface of the battery cell group 300 are formed on the side of the battery cell group 300 facing the protective plate assembly 200. The reinforcing layer 400 is at least disposed in the window portion, so that the reinforcing layer 400 can at least fill the window portion and cover the side of the battery cell 310 facing the protective plate assembly 200. The reinforcing layer 400 can be used to improve the impact resistance of the battery cell 310 on this side. Moreover, the reinforcing layer 400 is thicker at the position corresponding to the window portion of the battery cell 310, which can further improve the impact resistance of the battery cell 310 at the position corresponding to the window portion. This application does not limit this.

[0064] Alternatively, in some embodiments, a reinforcing layer 400 is provided on at least a portion of the periphery of the core shell 311.

[0065] It is understandable that omitting the insulating film 312 or replacing at least part of the insulating film 312 with a reinforcing layer 400 around the core shell 311 can further improve the protective performance of the cell 310.

[0066] In some embodiments, the thickness of the reinforcing layer 400 is less than or equal to the thickness of the core shell 311.

[0067] It is understandable that this design allows for a smaller overall thickness of the reinforcing layer 400, which, while ensuring the protective performance of the reinforcing layer 400 for the cell 310, improves the thermal conductivity between the core shell 311 of the cell 310 and the bottom protective plate 220, and makes the power battery structure more compact.

[0068] For example, in this embodiment, the thickness of the core shell 311 can be set to be between 0.5mm and 1.0mm, and the thickness of the reinforcing layer 400 can be 0.5mm, or the thickness of the reinforcing layer 400 can be less than 0.5mm. This application does not limit the specific thickness of the core shell 311 and the reinforcing layer 400.

[0069] In some embodiments, the reinforcing layer 400 is a cured coating.

[0070] It is understandable that by setting the reinforcing layer 400 as a curing coating, when laying the reinforcing layer 400, the slurry corresponding to the reinforcing layer 400 can be applied to the battery cell 310 and cured to form the reinforcing layer 400, making the installation of the reinforcing layer 400 convenient and quick.

[0071] Specifically, the cured coating includes at least one of a polyurea layer, a polyurethane layer, or an epoxy resin layer.

[0072] It is understood that polyurea is an elastomeric material formed by the reaction of isocyanate components and amino compound components. It can cure rapidly in a short time under natural conditions, forming a hard, puncture-resistant surface structure. For example, the polyurea layer can effectively disperse impacts greater than or equal to 400J. When the protective plate assembly 200 and the cell assembly 300 are impacted, it can form a relatively gentle indentation at the impact point rather than puncture deformation, thereby preventing insulation failure or internal short circuits in the cell 310. Furthermore, the polyurea layer has good wear resistance, impact resistance, and thermal stability. Therefore, using a polyurea layer as the curing coating can give the reinforcing layer 400 good structural strength, providing better protection for the cell 310.

[0073] Polyurethane and epoxy resins have similar properties to polyurea and can be used as substitutes for polyurea. Therefore, the cured coating can be a polyurea layer, a polyurethane layer, an epoxy resin layer, or other cured coatings with similar properties to polyurea; this application does not limit the application in this regard.

[0074] In specific implementation, a polyurea layer, a polyurethane layer, or an epoxy resin layer may be provided only on the side of the battery cell 310 facing the protective plate assembly 200, or a polyurea layer, a polyurethane layer, or an epoxy resin layer may be provided on all peripheral sides of the battery cell 310 and on the side facing the protective plate assembly 200. Alternatively, one of a polyurea layer, a polyurethane layer, and an epoxy resin layer may be provided on the side of the battery cell 310 facing the protective plate assembly 200, and one or even two of a polyurea layer, a polyurethane layer, and an epoxy resin layer may be provided on different peripheral sides of the battery cell 310. This application does not limit this.

[0075] In addition, by using a reinforcing layer 400 such as a polyurea layer to replace at least part of the insulating film 312, the impact protection performance of the cell 310 can be guaranteed, the possibility of insulation failure of the cell 310 can be reduced, and the structure of the cell 310 can be made simpler.

[0076] In some embodiments, the system also includes an adhesive layer 500, which bonds the reinforcing layer 400 and the protective plate assembly 200. Specifically, the adhesive layer 500 may be a thermally conductive structural adhesive layer.

[0077] It is understandable that setting the thermally conductive structural adhesive layer as the adhesive layer 500 can give the adhesive layer 500 good thermal conductivity to transfer heat from the battery cell 310. Moreover, the thermally conductive structural adhesive has a good adhesion effect with the aforementioned polyurea layer, polyurethane layer or epoxy resin layer, which facilitates stable adhesion of the reinforcing layer 400. This allows the reinforcing layer 400 and the battery cell 310 to be stably and reliably connected to the protective plate assembly 200. Furthermore, because the thermally conductive structural adhesive has a good adhesion effect with the aforementioned polyurea layer, polyurethane layer or epoxy resin layer, the coating thickness of the thermally conductive structural adhesive can be appropriately reduced to reduce costs and make the overall structure of the power battery more compact.

[0078] In some embodiments, refer to Figure 2 and Figure 3 As shown, the guard plate assembly 200 includes:

[0079] Heat sink 210 is disposed at the bottom of housing frame 100 and connected to reinforcing layer 400;

[0080] Bottom guard plate 220 is disposed on the side of heat sink 210 away from receiving frame 100 and is connected to receiving frame 100.

[0081] The buffer layer 230 is sandwiched between the heat sink 210 and the bottom protective plate 220.

[0082] The heat sink 210 is directly connected to the adhesive layer 500 to conduct heat to the cell assembly 300, thereby facilitating stable heat dissipation for each cell 310 in the cell assembly 300. Specifically, the heat sink 210 can be a water-cooled heat sink 210.

[0083] The bottom protective plate 220 can be a steel plate, which is set on the side of the heat sink 210 away from the housing frame 100 to connect with the heat sink 210. The bottom protective plate 220 is fixedly connected to the bottom of the housing frame 100. In this way, the bottom protective plate 220 provides impact protection for the heat sink 210 and the battery cell assembly 300, and realizes the stable installation of the protective plate assembly 200 and the housing frame 100.

[0084] A heating buffer layer 230 is installed between the bottom protective plate 220 and the heat sink 210. Specifically, the buffer layer 230 can be foam to reduce the impact force transmitted from the bottom protective plate 220 to the heat sink 210 and the battery cell assembly 300.

[0085] It should be noted that in some embodiments, the power battery provided in this application can also be applied to a structure in which the bottom of the housing frame 100 is not provided with a heat sink 210. The heat sink 210 of this type of power battery is usually provided on the periphery of the housing frame 100. In this regard, the side of the power battery cell assembly 300 facing the bottom protective plate 220 can be connected to the bottom protective plate 220 through the reinforcing layer 400 and the adhesive layer 500, and the side of the cell assembly 300 facing the periphery of the housing frame 100 can be connected to the heat sink 210 through the reinforcing layer 400 and the adhesive layer 500. This application does not limit this.

[0086] This application also provides an electrical device, including a device body and a power battery as described in any of the above embodiments connected to the device body.

[0087] The power battery has been described in detail in the above embodiments and will not be repeated here.

[0088] This application provides an electrical device that incorporates a power battery.

[0089] A protective plate assembly 200 is provided on one side of the housing frame 100 for the power battery, and a cell assembly 300 is provided in the housing cavity 110 of the housing frame 100. A reinforcing layer 400 is provided on the side of the cell assembly 300 facing the protective plate assembly 200 so that the reinforcing layer 400 is connected to the cell 310 and the reinforcing layer 400 is connected to the protective plate assembly 200.

[0090] Because the reinforcing layer 400 has stronger impact resistance, it forms impact protection on the side of the cell 310 facing the protective plate assembly 200. The reinforcing layer 400 improves the strength and impact resistance of the cell assembly 300 on the side facing the protective plate assembly 200. It also eliminates the need for a window structure on the side of the cell 310 facing the protective plate assembly 200, resulting in a simpler and more compact power battery structure.

[0091] Furthermore, the reinforcing layer 400 can also achieve a stable connection between the cell pack 300 and the protective plate assembly 200, thereby ensuring the reliability of the cell pack 300 assembly. This improves the protection performance of the cell pack 300 on the side facing the protective plate assembly 200 without adjusting the structure of the protective plate assembly 200, and keeps the overall structure of the power battery compact.

[0092] Furthermore, the reinforcement layer 400 is used to enhance the strength of the cell pack 300 on the side facing the protective plate assembly 200, so as to improve the protection performance of the cell pack 300 on the side facing the protective plate assembly 200 without adjusting the structure of the protective plate assembly 200, improve the impact resistance of the cell pack 300, and keep the overall structure of the power battery compact.

[0093] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0094] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0095] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0096] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A power cell, characterized by The application relates to a power battery. The power battery comprises a containing frame (100) which encloses a containing cavity (110); a guard plate assembly (200) which is connected with the containing frame (100) to support the containing frame (100); an electric core group (300) arranged in the containing cavity (110); and a reinforcing layer (400) arranged on the electric core group (300) and at least partially towards the guard plate assembly (200). The electric core group (300) comprises a plurality of electric cores (310) which comprise core shells (311) and cores arranged in the core shells (311), and the core shells (311) are connected with the reinforcing layer (400) at least on one side towards the guard plate assembly (200). The electric core (310) further comprises an insulating film (312) which is wrapped on at least part of the circumferential side of the core shell (311) and is adjacent to the reinforcing layer (400). At least part of the circumferential side of the core shell (311) is provided with the reinforcing layer (400).

2. The power cell of claim 1, wherein, The reinforcing layer (400) has a thickness less than or equal to that of the core shell (311).

3. The power cell of claim 2, wherein, The reinforcing layer (400) is a cured coating layer.

4. The power cell of claim 2, wherein, The cured coating layer comprises at least one of a polyurea layer, a polyurethane layer or an epoxy resin layer.

5. The power cell of claim 2, wherein, The application further comprises an adhesive layer (500) which bonds the reinforcing layer (400) and the guard plate assembly (200).

6. The power cell of any one of claims 1-5, wherein, The guard plate assembly (200) comprises a heat dissipation plate (210) arranged at the bottom of the containing frame (100) and connected with the reinforcing layer (400); a bottom guard plate (220) arranged on the side of the heat dissipation plate (210) away from the containing frame (100) and connected with the containing frame (100); and a buffer layer (230) sandwiched between the heat dissipation plate (210) and the bottom guard plate (220).

7. The power cell of claim 6, wherein, The application further relates to a device body and a power battery as claimed in any one of claims 1-9 connected with the device body.

8. The power cell of any one of claims 1-5, wherein, ​ 9. The power cell of any one of claims 1-5, wherein, ​ ​ ​ ​ 10. An electric device, characterized by ​

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