Battery pack and electric equipment

Abstract

The embodiment of the utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries, in the battery pack, a first opening, a second opening and a third opening are formed in an insulating film, and a part of a first outer wall, a part of a second outer wall and a part of a third outer wall of a single battery can be exposed respectively; the total bonding strength between the exposed part of each outer wall and the corresponding insulating film and the frame assembly is greater than 4.9 MPa and less than 7 MPa, so that enough bonding strength can be kept between at least three outer walls of each single battery and the frame assembly of the battery pack; therefore, the technical problem that the bonding strength of the single batteries and the frame assembly of the battery pack is insufficient can be solved, the single batteries have enough connection stability in at least three directions, it is guaranteed that the battery pack has enough structural stability, and the mechanical shock resistance of the battery pack is enhanced. Moreover, the low-temperature storage time required by dismounting the single batteries can be shortened, and meanwhile, the structural stability of the battery pack under a low-temperature condition can be improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and electrical equipment. Background Art

[0002] In a battery pack, individual cells are attached to the casing or other structural components through adhesive bonding. To ensure insulation, an insulating film is typically wrapped around the outer periphery of the individual cells. However, the materials typically used for this insulating film have low surface energy, which can reduce the effectiveness of the adhesive bond. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack, aiming to overcome the technical problem of insufficient bonding strength between the single cells in the battery pack and the outer shell or other structural parts of the battery pack; another purpose of the embodiment of the present application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of the present application includes:

[0005] A frame assembly is provided with a receiving space, wherein the frame assembly comprises a first component, a second component and a third component for enclosing the receiving space;

[0006] a single battery disposed in the accommodation space, the single battery comprising a first outer wall facing the first component, a second outer wall facing the second component, and a third outer wall facing the third component;

[0007] an insulating film disposed in the accommodation space and covering the single battery, the insulating film comprising a first diaphragm covering the first outer wall, a second diaphragm covering the second outer wall, and a third diaphragm covering the third outer wall, the first diaphragm having a first opening to expose a portion of the first outer wall, the second diaphragm having a second opening to expose a portion of the second outer wall, and the third diaphragm having a third opening to expose a portion of the third outer wall;

[0008] The first diaphragm is bonded to the first component with a bonding strength of P1 MPa, and the portion of the first outer wall exposed from the first diaphragm is bonded to the first component with a bonding strength of P2 MPa, satisfying: 4.9 <P1+P2<7;

[0009] The second diaphragm is bonded to the second component with a bonding strength of P3 MPa, and the portion of the second outer wall exposed from the second diaphragm is bonded to the second component with a bonding strength of P4 MPa, satisfying: 4.9 <P3+P4<7;

[0010] The third diaphragm is bonded to the third member with a bonding strength of P5 MPa, and the portion of the third outer wall exposed from the third diaphragm is bonded to the third member with a bonding strength of P6 MPa, satisfying: 4.9 <P5+P6<7。

[0011] In some embodiments, the first outer wall is the bottom wall of the single battery, and the battery pack satisfies: 6 <P1+P2<7。

[0012] In some embodiments, the battery pack further comprises:

[0013] a first adhesive layer, wherein the first membrane and a portion of the first outer wall exposed from the first membrane are bonded to the first component via the first adhesive layer;

[0014] a second adhesive layer, wherein the second membrane and a portion of the second outer wall exposed from the second membrane are bonded to the second member via the second adhesive layer;

[0015] The third adhesive layer is used to bond the third diaphragm and the portion of the third outer wall exposed from the third diaphragm to the third component.

[0016] In some embodiments, the materials of the first bonding layer, the second bonding layer, and the third bonding layer include thermally conductive structural adhesive.

[0017] In some embodiments, at least one of the first component, the second component, and the third component is configured as a liquid-cooled plate.

[0018] In some embodiments, the frame assembly includes an outer shell comprising a bottom panel and a plurality of side panels connected to the bottom panel;

[0019] The first component is the bottom panel, and at least one of the second component and the third component is the side panel.

[0020] In some embodiments, the battery pack includes a plurality of the single cells, the frame assembly is provided with a plurality of the accommodating spaces, and at least one single cell is disposed in each of the accommodating spaces.

[0021] In some embodiments, the frame assembly includes an outer shell, the outer shell includes a bottom plate, and the first member is the bottom plate;

[0022] The frame assembly includes a plurality of second components and a plurality of third components. The second components and the third components are alternately arranged in the outer shell and connected to the first component. Adjacent second components and third components are used to enclose at least one accommodating space.

[0023] In some embodiments, the first diaphragm is provided with a plurality of the first openings; and / or,

[0024] the second diaphragm is provided with a plurality of the second openings; and / or,

[0025] the third diaphragm is provided with a plurality of the third openings.

[0026] Correspondingly, an electrical device provided by an embodiment of the present application includes the above battery pack.

[0027] Beneficial effects: In the battery pack of the embodiment of the present application, by providing the first openings in the first diaphragm of the insulating film, a part of the first outer wall of the single battery can be exposed, so that the exposed part of the first outer wall can be bonded to the first component, reducing the barrier of the first diaphragm and enhancing the bonding strength between the frame assembly and the single battery at the first outer wall. By providing the second openings in the second diaphragm of the insulating film, a part of the second outer wall of the single battery can be exposed, so that the exposed part of the second outer wall can be bonded to the second component, reducing the barrier of the second diaphragm and enhancing the bonding strength between the frame assembly and the single battery at the second outer wall. By providing the third openings in the third diaphragm of the insulating film, a part of the third outer wall of the single battery can be exposed, so that the exposed part of the third outer wall can be bonded to the third component, reducing the barrier of the third diaphragm and enhancing the bonding strength between the frame assembly and the single battery at the third outer wall. At the same time, by setting the bonding strength P2 MPa between the exposed part of the first outer wall and the first component of the frame assembly and the bonding strength P1 MPa between the first diaphragm and the first component to satisfy 4.9 < P1 + P2 < 7, setting the bonding strength P4 MPa between the exposed part of the second outer wall and the second component of the frame assembly and the bonding strength P3 MPa between the second diaphragm and the second component to satisfy 4.9 < P3 + P4 < 7, setting the bonding strength P6 MPa between the exposed part of the third outer wall and the third component of the frame assembly and the bonding strength P5 MPa between the third diaphragm and the third component to satisfy 4.9 < P5 + P6 < 7; it enables at least three outer walls of the single battery to maintain sufficient bonding strength with the frame assembly of the battery pack, thereby being able to solve the technical problem of insufficient bonding strength between the single battery and the frame assembly of the battery pack. The single battery has sufficient connection stability at least on three outer walls, ensuring that the overall battery pack has sufficient structural stability and enhancing the mechanical shock resistance of the battery pack. Moreover, by setting the bonding strength within the above range, the low-temperature storage time required to remove the single battery can be reduced, and the efficiency of repairing and replacing components can be improved.

[0028] Compared with the prior art, the electrical device of the embodiment of the present application may include all the technical features and beneficial effects of the above battery pack, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the structure of a battery pack provided in some embodiments of the present application;

[0031] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle battery pack along the AA line;

[0032] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure of area A in the middle;

[0033] Figure 4 A schematic structural diagram of a single cell and an insulating film in a battery pack according to the first embodiment of the present application;

[0034] Figure 5 A schematic structural diagram of a single cell and an insulating film in a battery pack according to a second embodiment of the present application;

[0035] Figure 6 A schematic structural diagram of a single cell and an insulating film in a battery pack according to a third embodiment of the present application;

[0036] Figure 7 A schematic structural diagram of a single cell and an insulating film in a battery pack according to a fourth embodiment of the present application;

[0037] Figure 8 An exploded schematic diagram of the partial structure of a battery pack according to a fifth embodiment of the present application;

[0038] Figure 9 for Figure 8 Schematic diagram of the local enlarged structure of area B in the middle;

[0039] Figure numerals: 100-frame assembly; 110-accommodating space; 120-first component; 130-second component; 140-third component; 200-single cell; 210-first outer wall; 220-second outer wall; 230-third outer wall; 300-insulating film; 310-first diaphragm; 311-first opening; 320-second diaphragm; 321-second opening; 330-third diaphragm; 331-third opening; 410-first adhesive layer. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, "plurality" means two or more, and "at least one" means one, two, or more than two, unless otherwise clearly and specifically defined.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referenced. Therefore, features designated "first" or "second" may explicitly or implicitly include one or more of the aforementioned features. "First embodiment," "Second embodiment," etc., are simply numbered designations for ease of description and do not imply a ranking of importance among the embodiments.

[0043] Please also refer to Figures 1 to 9 The battery pack provided in the embodiment of the present application includes a frame assembly 100 , a single battery 200 , and an insulating film 300 .

[0044] See also Figure 2 and Figure 8 The frame assembly 100 is provided with a receiving space 110, and the single battery 200 and the insulating film 300 are arranged in the receiving space 110. The frame assembly 100 is a structural component of the battery pack, which can be used to support and connect other components of the battery pack including the single battery 200, and provide strength, stability and protection. The frame assembly 100 includes a first component 120, a second component 130 and a third component 140 for enclosing the receiving space 110. The single battery 200 includes a first outer wall 210 facing the first component 120, a second outer wall 220 facing the second component 130, and a third outer wall 230 facing the third component 140, so that the first outer wall 210 can be fixed by the first component 120, the second outer wall 220 can be fixed by the second component 130, and the third outer wall 230 can be fixed by the third component 140.

[0045] See also Figures 4 to 6 The insulating film 300 wraps the single battery 200. The insulating film 300 includes a first film 310 that wraps the first outer wall 210, a second film 320 that wraps the second outer wall 220, and a third film 330 that wraps the third outer wall 230. The first film 310, the second film 320, and the third film 330 can be of an integral structure, that is, integrally formed by the same piece of material; or they can be of a split structure, that is, separately processed and then connected together by means such as gluing. Among them, the first film 310 is provided with a first opening 311. The first opening 311 can expose a part of the first outer wall 210, that is, the first outer wall 210 is connected to the first film 310 so that a part of it is covered by the first film 310, and the part of the first outer wall 210 not covered by the first film 310 is exposed from the first opening 311. The second film 320 is provided with a second opening 321. The second opening 321 can expose a part of the second outer wall 220, that is, the second outer wall 220 is connected to the second film 320 so that a part of it is covered by the second film 320, and the part of the second outer wall 220 not covered by the second film 320 is exposed from the second opening 321. The third film 330 is provided with a third opening 331. The third opening 331 can expose a part of the third outer wall 230, that is, the third outer wall 230 is connected to the third film 330 so that a part of it is covered by the third film 330, and the part of the third outer wall 230 not covered by the third film 330 is exposed from the third opening 331.

[0046] The first film 310 is bonded to the first component 120, and the bonding strength is P1 MPa. The part of the first outer wall 210 exposed from the first film 310 is bonded to the first component 120, and the bonding strength is P2 MPa, satisfying: 4.9 < P1 + P2 < 7. That is to say, P1 + P2 can be any value among 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9 or the range value between any two values. Setting P1 + P2 within this range can enable the single battery 200 to maintain sufficient bonding strength with the frame assembly 100 on the side of its first outer wall 210, ensure the firmness of the connection, and improve the mechanical shock resistance of the single battery 200 on this side. And when disassembling the battery pack, the low-temperature storage time required for the single battery 200 on the side of the first outer wall 210 can be controlled within a more appropriate time range, which can reduce the disassembly time.

[0047] The second diaphragm 320 is bonded to the second component 130 with a bonding strength of P3 MPa. The part of the second outer wall 220 that exposes the second diaphragm 320 is bonded to the second component 130 with a bonding strength of P4 MPa, satisfying: 4.9 < P3 + P4 < 7. That is to say, P3 + P4 can be any value among 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9 or the range value between any two values. Setting P3 + P4 within this range can enable the single cell 200 to maintain sufficient bonding strength with the frame assembly 100 on the side of its second outer wall 220, ensure the firmness of the connection, and improve the mechanical shock resistance of the single cell 200 on this side. And when disassembling the battery pack, the low-temperature storage time required for the single cell 200 on the side of the second outer wall 220 can be controlled within a relatively appropriate time range, which can reduce the disassembly time.

[0048] The third diaphragm 330 is bonded to the third component 140 with a bonding strength of P5 MPa. The part of the third outer wall 230 that exposes the third diaphragm 330 is bonded to the third component 140 with a bonding strength of P6 MPa, satisfying: 4.9 < P5 + P6 < 7. That is to say, P5 + P6 can be any value among 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9 or the range value between any two values. Setting P5 + P6 within this range can enable the single cell 200 to maintain sufficient bonding strength with the frame assembly 100 on the side of its second outer wall 220, ensure the firmness of the connection, and improve the mechanical shock resistance of the single cell 200 on this side. And when disassembling the battery pack, the low-temperature storage time required for the single cell 200 on the side of the second outer wall 220 can be controlled within a relatively appropriate time range, which can reduce the disassembly time.

[0049] In the battery pack of the embodiment of the present application, a first opening 311 is defined in the first film 310 of the insulating film 300, a second opening 321 is defined in the second film 320, and a third opening 331 is defined in the third film 330. These openings expose portions of the first, second, and third outer walls 210, 220, and 230 of the cell 200, respectively. This allows the exposed portions of each outer wall of the cell 200 to directly bond with the frame assembly 100, reducing the obstruction of the insulating film 300 and its effect on bonding strength. This improves the overall bonding strength between the sides of each outer wall and the frame assembly 100. Furthermore, the sum of the bonding strengths on each side of the outer wall is controlled to be greater than 4.9 MPa and less than 7 MPa. This ensures that at least three outer walls of the cell 200 maintain sufficient bonding strength with the battery pack frame assembly 100, resolving the technical issue of insufficient bonding strength between the cell 200 and the battery pack frame assembly 100. The cells 200 have sufficient connection stability on at least three outer walls, ensuring sufficient structural stability for the battery pack as a whole and enhancing its resistance to mechanical impact. Compared to directly gluing the insulating film 300 to other structural components, this method can reduce the thickness of the adhesive layer while maintaining connection stability, and shorten the low-temperature storage time required to remove the cells.

[0050] Next, multiple embodiments and comparative examples are provided to illustrate the effects of the battery pack of the present application. It should be noted that P1, P2, P3, P4, P5, and P6 can be measured by common bonding strength test methods such as shear strength test, tensile strength test, compressive shear strength test, fatigue strength test, and peel strength test. One of the test methods can be selected to measure the bonding strength of the corresponding positions to obtain the values of P1, P2, P3, P4, P5, and P6 respectively. The effect of P1+P2, P3+P4, and P5+P6 on the structural strength of the battery pack can be determined by the results of the mechanical impact test. The mechanical impact test structure is tested using the test method of GB38031-2020 8.2.2. The effect of P1+P2, P3+P4, and P5+P6 on the structural stability of the battery pack under extremely cold conditions and the efficiency of disassembly and replacement of single cells are determined by the storage time in a -30°C environment.

[0051] The insulating film 300 can be made of a commonly used battery outer insulation material in the current battery technology field. The bonding strength between the insulating film 300 and the frame assembly 100 is less than the bonding strength between the outer walls of the single battery 200 and the frame assembly 100. In each embodiment and comparative example, the insulating film 300 is made of the same material. Furthermore, the structures of Comparative Examples 1 to 5 are the same as those of Examples 1 to 8, except that at least one of P1+P2, P3+P4, or P5+P6 in Comparative Examples 1 to 5 is outside the scope of this application.

[0052] Specifically, in Examples 1-8 and Comparative Examples 1-5 in the following table, the insulating film is made of PET, the structural adhesive used for bonding is two-component polyurethane, and the opening area of each film is less than 50%.

[0053] The test results are shown in the table below:

[0054]

[0055] Among them, in Examples 1 to 8, P1+P2, P3+P4, and P5+P6 are all within the range of greater than 4.9 and less than 7, and the mechanical impact test results are all passed, indicating that setting P1+P2, P3+P4, and P5+P6 within the control range of this application can ensure the structural strength of the battery pack and enable the battery pack to have better mechanical impact resistance.

[0056] In Comparative Example 1, P1+P2 is relatively small. In Comparative Example 2, P3+P4 and P5+P6 are both relatively small. In Comparative Example 3, P3+P4 is relatively small. All of the above are outside the range set by this application and are lower than the range set by this application. As a result, all three comparative examples failed the mechanical impact test, and the battery pack lost structural stability and failed during the test. It can be seen that, in comparison, the three comparative examples mainly have lower bonding strengths between the exposed portions of the corresponding outer walls and the frame assembly 100 than in the embodiment, resulting in insufficient total bonding strength at the corresponding outer walls. Therefore, the bonding strength of each exposed portion of the outer wall has a greater impact on the overall structural stability of the battery pack.

[0057] In Comparative Examples 4 and 5, P1+P2 was relatively large, both outside and exceeding the range set forth in this application. Both comparative examples passed the mechanical impact test. However, during the removal test, the storage time at -30°C exceeded 48 hours. This means that it took more than 48 hours for the adhesive properties to degrade to a level sufficient for manual removal of the cell 200. This resulted in a prolonged removal, repair, or replacement of the cell 200, impacting repair and replacement efficiency.

[0058] Furthermore, disassembly tests revealed that the battery packs of Examples 1, 3, 4, and 8 could be stored for a period of 36 to 48 hours at -30°C. This means that at -30°C, the battery packs of these examples all maintained a storage time of 36 to 48 hours, meeting the requirements for manual disassembly. This storage time is neither too long, ensuring efficient repair and replacement, nor too short, ensuring structural stability under low-temperature conditions. Comparing these examples with Examples 2, 5, 7, and 8 reveals that P1+P2 is greater in Examples 1, 3, 4, and 8 than in the other examples, indicating a greater total bond strength at the first outer wall 210. In each of these examples, the difference between the first outer wall 210 and the second and third outer walls 220, 230 is that the first outer wall 210 serves as the bottom wall of the battery cell 200. Under normal use, the first outer wall 210 is the bottom wall of the single battery 200 closest to the ground. Under extremely cold conditions, the surface temperature is relatively low. Setting a greater total bonding strength of the bottom wall can significantly improve the structural stability at low temperatures. Optionally, the battery pack meets: <P1+P2<7。

[0059] It should be noted that the examples or comparative examples in the above table are only used as a reference for data comparison and do not imply or limit the material of the insulating film, the material of the structural adhesive, and the size of the opening area; for example, the material of the insulating film can also be polypropylene or polycarbonate, and the material of the structural adhesive can also be one-component polyurethane, one-component epoxy resin, or two-component epoxy resin; the size of the opening area can also be greater than 50%, as long as the test requirements are met.

[0060] Optionally, the single battery 200 may be a square battery. Figure 4 The first outer wall 210 is the bottom wall of the single battery 200, and the second outer wall 220 and the third outer wall 230 are the side walls of the single battery 200. Figure 5 The first outer wall 210 is the wall with the largest area of the single cell 200 (usually called the large surface), and the second outer wall 220 and the third outer wall 230 are the side walls of the single cell 200. Figure 6 The first outer wall 210 is the bottom wall of the single cell 200 , and the second outer wall 220 and the third outer wall 230 are the large surfaces of the single cell 200 .

[0061] Please also refer to Figure 2 、 Figure 3 and Figure 4In some embodiments, the battery pack further includes a first adhesive layer 410, a second adhesive layer, and a third adhesive layer (the second adhesive layer and the third adhesive layer are not specifically shown in the figure). The first diaphragm 310 and the portion of the first outer wall 210 that exposes the first diaphragm 310 are bonded to the first component 120 via the first adhesive layer 410. The second diaphragm 320 and the portion of the second outer wall 220 that exposes the second diaphragm 320 are bonded to the second component 130 via the second adhesive layer. The third diaphragm 330 and the portion of the third outer wall 230 that exposes the third diaphragm 330 are bonded to the third component 140 via the third adhesive layer. Providing the first adhesive layer 410, the second adhesive layer, and the third adhesive layer can enhance adhesion and improve the bonding strength between the frame assembly 100 and the single battery 200 at each outer wall. Furthermore, by providing the first adhesive layer 410, the second adhesive layer and the third adhesive layer, the frame assembly 100 and the single battery 200 can be more tightly connected at each outer wall, each outer wall and the component can fit more closely, and the force applied to each outer wall can be dispersed and buffered, thereby improving the bonding strength and durability.

[0062] In some embodiments, the materials of the first adhesive layer 410, the second adhesive layer, and the third adhesive layer include thermally conductive structural adhesive. This not only ensures bonding strength, but also enhances the ability of the single battery 200 to dissipate heat to the frame assembly 100, thereby facilitating heat dissipation in the battery pack and further ensuring the safety and performance of the battery pack.

[0063] Please also refer to Figure 2 、 Figure 3 、 Figure 8 and Figure 9 In some embodiments, at least one of the first component 120, the second component 130, and the third component 140 is configured as a liquid cooling plate. That is, in the battery pack of the present application, the frame assembly 100 may include a liquid cooling plate.

[0064] exist Figure 1 、 Figure 2 and Figure 3 In the illustrated embodiment, the frame assembly 100 includes an outer shell, which includes a bottom plate and multiple side plates connected to the bottom plate. A first member 120 serves as the bottom plate, and at least one of the second member 130 and the third member 140 serves as a side plate. A liquid cooling plate is disposed at the bottom of the battery pack and can be part of the bottom plate or directly serve as the bottom plate of the outer shell.

[0065] In some embodiments, the battery pack includes a plurality of single cells 200, and the frame assembly 100 is provided with a plurality of receiving spaces 110, each receiving space 110 being provided with at least one single cell 200. For example, see Figure 8 and Figure 9The liquid cooling plate is arranged in the outer shell of the battery pack, dividing the inner space of the outer shell into a plurality of accommodating spaces 110 , and a plurality of single cells 200 are arranged in each accommodating space 110 , and the liquid cooling plate is attached to the large surface of the single cell 200 .

[0066] In some embodiments, the frame assembly 100 includes an outer shell, the outer shell includes a bottom plate, and the first member 120 is provided as the bottom plate. The frame assembly 100 includes a plurality of second members 130 and a plurality of third members 140, the second members 130 and the third members 140 are alternately arranged in the outer shell and connected to the first member 120, and adjacent second members 130 and third members 140 are used to enclose at least one receiving space 110. For example, see Figure 8 and Figure 9 The second component 130 and the third component 140 can be respectively configured as liquid cooling plates. Two adjacent liquid cooling plates and the bottom plate form a receiving space 110 in which a plurality of single batteries 200 are sandwiched.

[0067] See also Figure 7 In some embodiments, the first diaphragm 310 has a plurality of first openings 311, through which the first outer wall 210 is exposed. In some embodiments, the second diaphragm 320 has a plurality of second openings 321, through which the second outer wall 220 is exposed. In some embodiments, the third diaphragm 330 has a plurality of third openings 331, through which the third outer wall 230 is exposed.

[0068] Accordingly, the embodiments of the present application provide an electrical device, which may be a mobile phone, a portable device, a laptop computer, an electric vehicle, an electric car, a ship, a spacecraft, an electric toy, an electric tool, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecrafts; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; and electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. It is understandable that the electrical device may include all the technical features and beneficial effects of the above-mentioned battery pack, which will not be elaborated here.

[0069] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] The above is a detailed introduction to the battery pack and electrical equipment provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A frame assembly (100) is provided with a receiving space (110), wherein the frame assembly (100) comprises a first component (120), a second component (130), and a third component (140) for enclosing the receiving space (110); A single battery (200) is disposed in the accommodating space (110), the single battery (200) comprising a first outer wall (210) facing the first component (120), a second outer wall (220) facing the second component (130), and a third outer wall (230) facing the third component (140); an insulating film (300) disposed in the accommodating space (110) and covering the single battery (200), the insulating film (300) comprising a first diaphragm (310) covering the first outer wall (210), a second diaphragm (320) covering the second outer wall (220), and a third diaphragm (330) covering the third outer wall (230), the first diaphragm (310) being provided with a first opening (311) to expose a portion of the first outer wall (210), the second diaphragm (320) being provided with a second opening (321) to expose a portion of the second outer wall (220), and the third diaphragm (330) being provided with a third opening (331) to expose a portion of the third outer wall (230); The first diaphragm (310) is bonded to the first component (120) with a bonding strength of P1 MPa, and the portion of the first outer wall (210) exposed from the first diaphragm (310) is bonded to the first component (120) with a bonding strength of P2 MPa, satisfying: 4.9 <P1+P2<7; The second diaphragm (320) is bonded to the second member (130) with a bonding strength of P3 MPa, and the portion of the second outer wall (220) exposed from the second diaphragm (320) is bonded to the second member (130) with a bonding strength of P4 MPa, satisfying: 4.9 <P3+P4<7; The third diaphragm (330) is bonded to the third member (140) with a bonding strength of P5 MPa, and the portion of the third outer wall (230) exposed from the third diaphragm (330) is bonded to the third member (140) with a bonding strength of P6 MPa, satisfying: 4.9 <P5+P6<7。 2. The battery pack according to claim 1, wherein: The first outer wall (210) is the bottom wall of the single battery (200), and the battery pack satisfies: 6 <P1+P2<7。 3. The battery pack according to claim 1, wherein: The battery pack further includes: a first adhesive layer (410), wherein the first diaphragm (310) and a portion of the first outer wall (210) exposed from the first diaphragm (310) are bonded to the first component (120) via the first adhesive layer (410); a second adhesive layer, wherein the second membrane (320) and a portion of the second outer wall (220) exposed from the second membrane (320) are bonded to the second component (130) via the second adhesive layer; A third bonding layer, the third diaphragm (330) and the portion of the third outer wall (230) exposed from the third diaphragm (330) are bonded to the third component (140) through the third bonding layer.

4. The battery pack according to claim 3, wherein: The materials of the first bonding layer (410), the second bonding layer and the third bonding layer include thermally conductive structural adhesive.

5. The battery pack according to claim 1, wherein: At least one of the first component (120), the second component (130), and the third component (140) is configured as a liquid cooling plate.

6. The battery pack according to claim 1, wherein: The frame assembly (100) includes an outer shell, the outer shell including a bottom plate and a plurality of side plates connected to the bottom plate; The first component (120) is the bottom plate, and at least one of the second component (130) and the third component (140) is the side plate.

7. The battery pack according to claim 1, wherein: The battery pack includes a plurality of the single batteries (200), the frame assembly (100) is provided with a plurality of the accommodating spaces (110), and each of the accommodating spaces (110) is provided with at least one single battery (200).

8. The battery pack according to claim 7, characterized in that: The frame assembly (100) includes an outer shell, the outer shell includes a bottom plate, and the first component (120) is the bottom plate; The frame assembly (100) includes a plurality of second components (130) and a plurality of third components (140), wherein the second components (130) and the third components (140) are alternately arranged in the outer shell and connected to the first component (120), and adjacent second components (130) and third components (140) are used to enclose at least one of the accommodating spaces (110).

9. The battery pack according to claim 1, wherein: The first diaphragm (310) is provided with a plurality of the first openings (311); and / or, The second diaphragm (320) is provided with a plurality of second openings (321); and / or, The third diaphragm (330) is provided with a plurality of third openings (331).

10. An electrical device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 9.

Images