Battery pack and powered device

Abstract

The present disclosure relates to a battery pack and an electric device, the battery pack comprising: a battery pack shell, an inner part of which is formed with a battery cavity; a battery module, arranged in the battery cavity and spaced apart from at least part of the inner wall of the battery pack shell to form a filling space; a blocking structure, arranged in the filling space to divide the filling space into at least two filling areas; and a filling adhesive, filled in the filling areas to connect the battery module to the inner wall of the battery pack shell; wherein the blocking structure is at least partially configured as a flexible solid adhesive, the flexible solid adhesive being bonded to the outer wall of the battery module; and / or the flexible solid adhesive being bonded to the inner wall of the battery pack shell. The flexible solid adhesive has good conformability and bonding capacity, thereby effectively blocking the gaps, reducing the leakage of the filling adhesive between the filling areas, improving the sealing between the filling areas, and improving the uniformity of the filling adhesive.

Description

Technical Field

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

[0002] Battery packs are commonly used in new energy vehicles. A new energy battery pack consists of a casing and battery modules. The battery pack casing, as the carrier of the battery modules, plays a key role in the safe operation and protection of the battery modules.

[0003] In related technologies, in order to improve the stability and strength of the battery module installed in the housing, glue is often poured into the housing. However, uneven glue pouring is prone to occur. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this disclosure provides a battery pack and an electrical device to solve the technical problems existing in the related technologies.

[0005] According to a first aspect of the present disclosure, a battery pack is provided, the battery pack comprising: The battery pack casing has a battery cavity formed inside; A battery module is disposed within the battery cavity and spaced apart from at least a portion of the inner wall of the battery pack housing to form a filling space; A sealing structure is disposed within the filling space to divide the filling space into at least two filling regions; Filler adhesive is used to fill the filling area to connect the battery module to the inner wall of the battery pack housing; Wherein, the sealing structure is at least partially constructed as a flexible solid adhesive, which is bonded to the outer wall of the battery module; and / or, the flexible solid adhesive is bonded to the inner wall of the battery pack housing.

[0006] In some embodiments, the filling space includes a first filling space, wherein the outer sidewall of the battery module and the inner sidewall of the battery pack housing are spaced apart to form the first filling space; The sealing structure includes at least one first sealing element, and the first sealing element includes at least the flexible solid adhesive; The flexible solid adhesive is bonded to the outer side wall of the battery module; and / or, the flexible solid adhesive is bonded to the inner side wall of the battery pack housing; and / or, the flexible solid adhesive is bonded to the inner bottom wall of the battery pack housing.

[0007] In some embodiments, the first sealing member further includes a sealing body, the sealing body including a first outer surface; The first outer surface is disposed opposite to the inner sidewall and inner bottom wall of the battery pack housing, and the outer sidewall of the battery module; The flexible solid adhesive includes a first flexible solid adhesive, a first side of which is bonded to the first outer surface, and a second side of which is bonded to the outer wall and inner bottom wall of the battery pack housing, as well as the outer wall of the battery module.

[0008] In some embodiments, the sealing body has a through mounting hole for external components to pass through; The flexible solid adhesive also includes a second flexible solid adhesive, the first side of which is bonded to the inner wall of the mounting hole, and the second side of which is used to bond to an external component.

[0009] In some embodiments, the inner wall of the battery pack housing includes a first inner side surface, and the outer wall of the battery module includes a first outer side surface; The first inner side and the first outer side are spaced apart and opposite to each other in a first direction, and the first sealing member is disposed between the first inner side and the first outer side; The dimensions of the first inner side and the first outer side in the first direction are the first dimensions, and the dimensions of the sealing body in the first direction are the second dimensions; the first dimension is larger than the second dimension, and the difference between the two dimensions is between 3mm and 10mm, and the first flexible solid adhesive protrudes from the first outer surface by a size between 3mm and 6mm.

[0010] In some embodiments, the sealing body includes an elastic block with a Shore hardness between Shore A30 and Shore D50, and the flexible solid adhesive has a Shore hardness less than that of the elastic block.

[0011] In some embodiments, the filling space includes a second filling space, wherein the upper surface of the battery module is spaced apart from the inner wall of the upper cover of the battery pack housing to form the second filling space; The sealing structure includes at least one second sealing element, wherein the second sealing element is configured as the flexible solid adhesive; The second sealing member is adhered to the upper edge of the battery module and protrudes from the upper surface of the battery module, and the second sealing member is adhered to the inner wall of the upper cover to enclose the filling area between the battery module and the upper cover.

[0012] In some embodiments, the filling space further includes a first filling space, wherein the outer sidewall of the battery module and the inner sidewall of the battery pack housing are spaced apart to form the first filling space; The sealing structure includes at least one first sealing element, which is disposed within the first filling space.

[0013] In some embodiments, the flexible solid adhesive includes, but is not limited to, any one or a combination of butyl rubber, acrylic adhesive, epoxy resin adhesive, and EPDM rubber.

[0014] According to a second aspect of the present disclosure, an electrical device is provided, the electrical device including the battery pack.

[0015] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: the battery module and at least part of the inner wall of the battery pack housing are spaced apart to form a filling space. By setting the sealing structure in the filling space and dividing the filling space into at least two filling areas, the remaining space of the battery pack is reasonably partitioned, so that the filler glue can be filled in the corresponding filling areas in a partitioned manner. Differentiated potting can be achieved, avoiding the overall filling of the filling space with filler glue, thereby reducing the problem of uneven filling of filler glue and improving the uniformity of filler glue filling.

[0016] The sealing structure is at least partially constructed of flexible solid adhesive, which is bonded to the outer wall of the battery module; and / or, the flexible solid adhesive is bonded to the inner wall of the battery pack housing. The flexible solid adhesive has good conformability and adhesion, which can effectively seal gaps, reduce leakage of filler adhesive between filling areas, improve the sealing between filling areas, and further improve the uniformity of filler adhesive filling.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0019] Figure 1 This is an exploded structural diagram of a battery pack according to one embodiment of the present disclosure.

[0020] Figure 2 yes Figure 1 A magnified view of point C in the image.

[0021] Figure 3 This is a partial structural schematic diagram of a battery pack according to one embodiment of the present disclosure.

[0022] Figure 4 yes Figure 3 A magnified view of a section at point D.

[0023] Figure 5 yes Figure 3 A magnified view of a section at point E in the middle.

[0024] Figure 6 This is a schematic diagram illustrating the structure of the first sealing element according to an embodiment of this disclosure.

[0025] Figure 7 This is a schematic diagram illustrating the structure of the first sealing element according to another embodiment of this disclosure.

[0026] Explanation of reference numerals in the attached figures 1. Battery pack casing; 10. Battery cavity; 11. First inner side surface; 12. Top cover; 2. Battery module; 20. Filling space; 201. Filling area; 202. First filling space; 21. First outer surface; 3. Sealing structure; 31. First sealing component; 311. Sealing body; 312. First flexible solid adhesive; 313. Mounting hole; 314. Second flexible solid adhesive; 32. Second sealing component; 4. Electrical components; A. First direction; B. Second direction. Detailed Implementation

[0027] 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 numerals 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 disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0028] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" refer to relative concepts in the direction of battery pack thickness. "Upper side" refers to one side of the battery pack's top cover, and "lower side" refers to one side of the bottom of the battery pack's casing. In actual installation, the "upper side" of the battery pack can be the same as the upper side of the vehicle under normal operating conditions, and the "lower side" can be the same as the lower side of the vehicle under normal operating conditions; alternatively, the "upper side" of the battery pack can be opposite to the upper side of the vehicle under normal operating conditions, and the "lower side" can be opposite to the lower side of the vehicle under normal operating conditions. In other words, the battery pack can be installed in the vehicle upright, reversed, or side-mounted; this disclosure does not limit this. For details, please refer to [link to relevant documentation]. Figure 1 As shown; the directional terms used, such as "first direction" and "second direction," can also be found in the following examples. Figure 1As shown; the directional terms used, such as "inner" and "outer", refer to the inner and outer parts of the specific structural outline, and the terms used, such as "first" and "second", are only used to distinguish one element from another and do not have any order or importance.

[0029] Reference Figures 1 to 7 As shown, this disclosure provides a battery pack, which includes a battery pack housing 1, a battery module 2, a sealing structure 3, and a filler adhesive. A battery cavity 10 is formed inside the battery pack housing 1. The battery module 2 is disposed within the battery cavity 10 and is spaced apart from at least a portion of the inner wall of the battery pack housing 1 to form a filling space 20. The sealing structure 3 is disposed within the filling space 20 to divide the filling space 20 into at least two filling regions 201. The filler adhesive fills the filling regions 201 to connect the battery module 2 to the inner wall of the battery pack housing 1. The sealing structure 3 is at least partially constructed as a flexible solid adhesive, which is bonded to the outer wall of the battery module 2 and / or to the inner wall of the battery pack housing 1.

[0030] In the above technical solution, the battery module 2 and at least part of the inner wall of the battery pack housing 1 are spaced apart to form a filling space 20. By setting the sealing structure 3 in the filling space 20, the filling space 20 can be divided into at least two filling areas 201, and the remaining space of the battery pack can be reasonably partitioned. Thus, the filler glue can be filled in the corresponding filling areas 201 in a partitioned manner, which can achieve differentiated potting and avoid filling the filling space 20 as a whole with filler glue, thereby reducing the problem of uneven filling of filler glue and improving the uniformity of filling of filler glue.

[0031] The sealing structure 3 is at least partially constructed of flexible solid adhesive, which is bonded to the outer wall of the battery module 2; and / or, the flexible solid adhesive is bonded to the inner wall of the battery pack housing 1. The flexible solid adhesive has good conformability and adhesion, which can effectively seal the gaps, reduce the leakage of filling adhesive between the filling areas 201, improve the sealing between the filling areas 201, and further improve the uniformity of filling adhesive.

[0032] It should be noted that the aforementioned battery module 2 is mainly composed of multiple stacked battery cells, serving as the power supply for the battery pack. For example, the battery module 2 of this disclosure may include a module housing (not shown) and multiple battery cells, with the multiple battery cells stacked within the module housing. The module housing effectively protects the multiple battery cells, and the filler adhesive of this disclosure may not be located within the module housing. Alternatively, the battery module 2 of this disclosure may not have a module housing; the multiple battery cells are stacked to form the battery module 2, and the filler adhesive of this disclosure may be used to fill the gaps between the battery cells. This disclosure does not limit this aspect.

[0033] For flexible solid adhesive solutions, the following three options can be included: 1) Part or all of the sealing structure 3 is made of flexible solid adhesive, which is bonded to the outer wall of the battery module 2.

[0034] 2) Part or all of the sealing structure 3 is made of flexible solid adhesive, which is bonded to the inner wall of the battery pack housing 1.

[0035] 3) Part or all of the sealing structure 3 is made of flexible solid adhesive, which is bonded to the outer wall of the battery module 2 and to the inner wall of the battery pack housing 1.

[0036] Furthermore, the filler adhesive can be either foamed or non-foamed, and this disclosure does not limit it; the potting method of the filler adhesive can be either partial potting or full potting, and this disclosure does not limit it.

[0037] In one approach, referencing Figures 3 to 5 As shown, the filling space 20 includes a first filling space 202, formed by the outer sidewall of the battery module 2 and the inner sidewall of the battery pack housing 1 spaced apart. The sealing structure 3 includes at least one first sealing element 31, which includes at least a flexible solid adhesive; the flexible solid adhesive is bonded to the outer sidewall of the battery module 2; and / or, the flexible solid adhesive is bonded to the inner sidewall of the battery pack housing 1; and / or, the flexible solid adhesive is bonded to the inner bottom wall of the battery pack housing 1.

[0038] It should be explained that the flatness of the inner bottom wall of the battery pack housing 1 is generally 3~7mm. The unevenness of the inner bottom wall of the battery pack housing 1 will cause the filler glue poured into the first filling space 202 to flow abnormally, causing the filler glue to accumulate in the concave area of ​​the inner bottom wall of the battery pack housing 1, while the convex area has a small amount or even no filler glue remaining.

[0039] Taking foamed rubber as an example, uneven distribution of the initial filler will directly lead to significant differences in the final height after the filler has expanded, resulting in uncontrollable expansion height of the filler in the first filling space 202 and poor consistency of the battery pack in mass production.

[0040] In this embodiment, by setting a first sealing element 31 in the first filling space 202, the first sealing element 31 can reasonably divide the first filling space 202 into zones, thereby allowing for the filling of each filling area 201 with differentiated filler adhesive. Differentiated filling can precisely control the potting height or expansion height, the coverage area, and the density of the filler adhesive as needed. The core of regional differentiated potting is that the filler adhesive in each filling area 201 "stays in place (i.e., stays in the corresponding filling area 201) and does not flow abnormally before initial curing or expansion."

[0041] For a specific implementation of the first sealing element 31, the following three embodiments may be included: 1) Part or all of the first sealing component 31 is constructed of flexible solid adhesive, which is bonded to the outer wall of the battery module 2.

[0042] 2) Part or all of the first sealing component 31 is made of flexible solid adhesive, which is bonded to the inner wall of the battery pack housing 1.

[0043] 3) Part or all of the first sealing component 31 is made of flexible solid adhesive, which is bonded to the outer side wall of the battery module 2 and to the inner side wall of the battery pack housing 1.

[0044] Furthermore, the specific shape of the first filling space 202 is related to the shapes of the battery module 2 and the battery pack housing 1. For example, the outer sidewall of the battery module 2 is curved, and the inner sidewall of the battery pack housing 1 is also curved, defining an annular cavity. Alternatively, the battery module 2 may be constructed in a cuboid shape, and the interior of the battery pack housing 1 may also be a cuboid space; wherein, the first filling space 202 may be the space defined between any one or more sides of the battery module 2 and the battery pack housing 1, and this disclosure does not limit this.

[0045] For example, refer to Figure 3 As shown, in the first direction A, the battery module 2 and the battery pack housing 1 are spaced apart, and the battery module 2 defines the first filling space 202 on both sides of the battery pack housing 1 in the first direction A. The first sealing member 31 is disposed in the first filling space 202.

[0046] In addition, in the second direction B, the battery module 2 and the battery pack housing 1 are spaced apart, and the battery module 2 defines a first filling space 202 on both sides of the battery pack housing 1 in the second direction B, and the first sealing member 31 is disposed in the first filling space 202.

[0047] Optionally, refer to Figure 6 and Figure 7As shown, the first sealing component 31 also includes a sealing body 311, which includes a first outer surface. The first outer surface is disposed opposite to the inner sidewall and inner bottom wall of the battery pack housing 1 and the outer sidewall of the battery module 2. The flexible solid adhesive includes a first flexible solid adhesive 312, the first side of which is bonded to the first outer surface, and the second side of which is bonded to the outer sidewall and inner bottom wall of the battery pack housing 1 and the outer sidewall of the battery module 2.

[0048] That is, in this embodiment, the first sealing component 31 includes not only the flexible solid adhesive mentioned above, but also a sealing body 311, which provides an installation base for the flexible solid adhesive and can provide a certain strength for the first sealing component 31.

[0049] In addition, the first side of the first flexible solid adhesive 312 is bonded to the first outer surface, and the second side of the first flexible solid adhesive 312 is bonded to the inner side wall and inner bottom wall of the battery pack housing 1, as well as the outer side wall of the battery module 2, thereby achieving a good sealing effect and preventing leakage of the filler adhesive in the filling area 201.

[0050] Optionally, the aforementioned sealing body 311 may include an elastic block with a Shore hardness between Shore A30 and Shore D50, and the Shore hardness of the flexible solid adhesive is less than that of the elastic block.

[0051] In this embodiment, the hardness of the sealing body 311 is greater than that of the flexible solid adhesive. This is because it is necessary to ensure the rigidity and perpendicularity of the first sealing component 31 during assembly and potting. This prevents the first sealing component 31 from bending in the direction of the gap between the inner wall of the battery pack housing 1 and the battery module 2 (e.g., the first direction A or the second direction B) during assembly due to the use of an overly soft material, which would result in an unstable fixation. The sealing body 311 can provide a certain degree of bending stiffness and support strength.

[0052] In addition, even if different pressures are applied to the first sealing member 31 by the filling adhesive in two adjacent filling areas 201 during the filling and initiation process, the sealing body 311 can effectively improve the support strength of the first sealing member 31 and reduce the occurrence of the first sealing member 31 tilting or tipping over.

[0053] Regarding the specific material of the sealing body 311, it can be a foam or soft rubber corresponding to materials such as PU (polyurethane), EPDM (ethylene propylene diene monomer rubber), CR (chloroprene rubber), EVA (ethylene-vinyl acetate copolymer), EPP (polypropylene foam), XPE (crosslinked polyethylene) and SBR (styrene-butadiene rubber), but this disclosure does not limit the specific material of the sealing body 311.

[0054] In another embodiment, refer to Figure 3 and Figure 4 As shown, the inner wall of the battery pack housing 1 includes a first inner side surface 11, and the outer wall of the battery module 2 includes a first outer side surface 21; the first inner side surface 11 and the first outer side surface 21 are spaced apart and arranged opposite each other in the first direction A, and the first sealing member 31 is disposed between the first inner side surface 11 and the first outer side surface 21; the dimensions of the first inner side surface 11 and the first outer side surface 21 in the first direction A are first dimensions, and the dimensions of the sealing body 311 in the first direction A are second dimensions; the first dimension is larger than the second dimension, and the difference between the two dimensions is between 3mm and 10mm, and the first flexible solid adhesive 312 protrudes from the first outer surface by a size between 3mm and 6mm.

[0055] In this embodiment, the difference between the first dimension and the second dimension can be 3mm; or, the difference between the first dimension and the second dimension can be 6mm; or, the difference between the first dimension and the second dimension can be 10mm. The first flexible solid adhesive 312 protruding from the first outer surface can be 3mm, or, the first flexible solid adhesive 312 protruding from the first outer surface can be 5mm; or, the first flexible solid adhesive 312 protruding from the first outer surface can be 6mm. This disclosure does not limit the specific dimensions, as long as they facilitate assembly and improve the sealing effect.

[0056] For example, the sum of the dimensions (second dimension) of the sealing body 311 in the first direction A and the dimensions of the first flexible solid adhesive 312 protruding from the first outer surface can be no less than the dimensions (first dimension) of the first inner side surface 11 and the first outer side surface 21 in the first direction A, which can effectively improve the sealing effect. In addition, the sealing structure 3 can be slightly bent during assembly to facilitate assembly and avoid structural interference.

[0057] Alternatively, the sealing body 311 can be placed at a designated location within the filling space 20, and then the first flexible solid adhesive 312 can be filled between the sealing body 311 and the inner wall of the battery pack housing 1.

[0058] Furthermore, considering the sealing and bonding effect of the assembly, the first sealing member 31 can be interference-fitted between the first inner surface 11 and the first outer surface 21. For example, the difference between the first dimension and the second dimension can be 3mm, and the first flexible solid adhesive 312 can protrude 4mm from the first outer surface.

[0059] In addition, when foaming adhesive is used as the filler, the height of the sealing body 311 can be designed to be 1 / 5 to 1 / 2 of the height of the filling area 201 to be filled. This dimension is mainly determined by the actual foaming ratio of the filler in the filling area 201. Usually, the free foaming ratio of the filler is 3 to 6 times. The height of the sealing body 311 only needs to ensure that the leveling height before the filler starts to expand does not exceed 2 / 3 to 4 / 5 of the height of the sealing body 311. The thickness of the sealing body 311 (the distance between the two large surfaces) can be set between 3mm and 15mm. Its thickness is related to its material and hardness. It is sufficient to achieve the purpose of fixing and preventing the filler from collapsing during filling and expansion. When the thickness of the sealing body 311 meets the above requirements, the thinner the thickness should be.

[0060] When a non-foaming adhesive is used as the filler, the height of the sealing body 311 can be designed according to the actual potting height of the non-foaming adhesive. The height of the sealing body 311 can be higher than the actual potting height of the non-foaming adhesive. For example, the height of the sealing body 311 can be 3mm to 5mm higher than the height of the potted non-foaming adhesive.

[0061] Additionally, refer to Figure 6 As shown, the sealing body 311 has a through mounting hole 313 for external components to pass through; the flexible solid adhesive also includes a second flexible solid adhesive 314, the first side of the second flexible solid adhesive 314 is bonded to the inner wall of the mounting hole 313, and the second side of the second flexible solid adhesive 314 is used to bond to the external components.

[0062] In this embodiment, by providing a second flexible solid adhesive 314 on the inner wall of the mounting hole 313, the second flexible solid adhesive 314 can effectively fill and seal the gap between the inner wall of the mounting hole 313 and the outer wall of the external component, preventing the adhesive from leaking through the gap into two adjacent filling areas 201. Furthermore, the second flexible solid adhesive 314 can also effectively bond the external component, improving the stability of the external component installation.

[0063] This disclosure does not limit the specific shape of the first flexible solid adhesive 312 and the second flexible solid adhesive 314 mentioned above. For example, the first flexible solid adhesive 312 and the second flexible solid adhesive 314 can be constructed as strip structures, and the cross-section of the strip structure can be constructed as a rectangle. However, this disclosure does not limit the specific shape of the first flexible solid adhesive 312 and the second flexible solid adhesive 314.

[0064] The external component can be a cooling water pipe for the battery pack, and the mounting hole 313 is used to avoid the cooling water pipe, but this disclosure does not limit the specific shape of the external component.

[0065] For example, the first direction A mentioned above can be the front-to-back direction of the vehicle. A first filling space 202 is arranged on the front side of the battery module 2, and a first filling space 202 is also arranged on the rear side of the battery module 2. The cooling water pipe can be arranged in the front first filling space 202, and the first sealing member 31 in the front first filling space 202 can be formed with the aforementioned mounting hole 313. And / or, the cooling water pipe can also be arranged in the rear first filling space 202, and the first sealing member 31 in the rear first filling space 202 can be formed with the aforementioned mounting hole 313.

[0066] Additionally, it should be noted that, referring to Figure 1 As shown, electrical components 4 are typically integrated on the top of battery module 2. These electrical components 4 may include series and parallel copper-aluminum busbars for battery cells, voltage and temperature sampling components, etc. The filler adhesive in this area needs to cover and fix the aforementioned weak sampling points, fill the high-voltage connection gaps, and serve as insulation and moisture barrier. At the same time, the filler adhesive acts as a bridge to bond the top area of ​​battery module 2 to the inside of the top cover 12 of the battery pack, thereby strengthening the overall structural strength of the battery pack.

[0067] The top area of ​​the battery module 2 is directly connected to the first filling space 202 mentioned above. If a reasonable sealing structure 3 is not designed around the top of the battery module 2, the filler glue above the battery module 2 will flow uncontrollably into the first filling space 202, causing poor potting in the top area of ​​the battery module 2 and excessive filling of the first filling space 202.

[0068] Regarding the issues mentioned above, refer to Figure 1 and Figure 2 As shown, the filling space 20 may also include a second filling space, with the upper surface of the battery module 2 and the inner wall of the upper cover 12 of the battery pack housing 1 spaced apart to form a second filling space; the sealing structure 3 includes at least one second sealing member 32, which is constructed as a flexible solid adhesive; the second sealing member 32 is bonded to the upper edge of the battery module 2 and protrudes from the upper surface of the battery module 2, and the second sealing member 32 is bonded to the inner wall of the upper cover 12 to enclose a filling area 201 between the battery module 2 and the upper cover 12.

[0069] That is, in this embodiment, by setting a second sealing member 32, with one side of the second sealing member 32 bonded to the upper edge of the battery module 2 and the other side bonded to the inner wall of the top cover 12, a filling area 201 is formed between the battery module 2 and the top cover 12. In addition, the second sealing member 32 is constructed of flexible solid adhesive, which has good conformability and good bonding strength. During the installation of the top cover 12, the pressing pressure generated by the robotic arm or manual assembly completes the sealing and blocking of the uneven area at the top periphery of the battery module 2. For special stepped or narrow gaps that need to be sealed, the pressing time is extended or the pressing force is increased, so that the second sealing member 32 conforms to the shape to achieve sealing.

[0070] In addition, the second sealing member 32 mentioned above can be constructed as a strip. The diameter or height of the second sealing member 32 does not exceed half the height from the top surface of the battery module 2 to the inner side of the cover 12. Corresponding to the position of the air guiding and bubble venting cotton on the top of the battery module 2, the strip-shaped second sealing member 32 can be intermittently pasted to ensure that the filling adhesive does not flow out and to ensure that the air guiding function of the open foam is performed.

[0071] Optionally, the battery module 2 is constructed in a cuboid shape. The battery module 2 includes four side edges, and four first sealing members 31 are arranged at the positions of the four side edges. The four first sealing members 31 can be connected to the second sealing members 32.

[0072] For example, the four first sealing elements 31 can be bonded to the second sealing elements 32, wherein the second sealing elements 32 are constructed of flexible solid adhesive, and the first sealing elements 31 can include an elastic block and flexible solid adhesive covering the outer surface of the elastic block. Alternatively, the four first sealing elements 31 can be integrally formed with the second sealing elements 32, wherein both the four first sealing elements 31 and the second sealing elements 32 are constructed of flexible solid adhesive.

[0073] In addition, the aforementioned flexible solid adhesives include, but are not limited to, any one or a combination of butyl rubber, acrylic adhesives, epoxy resin adhesives, and EPDM rubber. This disclosure does not limit the specific materials of the flexible solid adhesives.

[0074] This disclosure also provides an electrical device that includes the aforementioned battery pack. For example, the electrical device may include vehicles, ships, and aircraft, and this disclosure does not limit the specific type of electrical device.

[0075] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure 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 disclosure are indicated by the following claims.

[0076] It should be understood that this disclosure is not limited to the precise structures 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 disclosure is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, The battery pack includes: The battery pack casing has a battery cavity formed inside; A battery module is disposed within the battery cavity and spaced apart from at least a portion of the inner wall of the battery pack housing to form a filling space; A sealing structure is disposed within the filling space to divide the filling space into at least two filling regions; Filler adhesive is used to fill the filling area to connect the battery module to the inner wall of the battery pack housing; Wherein, the sealing structure is at least partially constructed as a flexible solid adhesive, which is bonded to the outer wall of the battery module; and / or, the flexible solid adhesive is bonded to the inner wall of the battery pack housing.

2. The battery pack according to claim 1, characterized in that, The filling space includes a first filling space, wherein the outer sidewall of the battery module and the inner sidewall of the battery pack housing are spaced apart to form the first filling space; The sealing structure includes at least one first sealing element, and the first sealing element includes at least the flexible solid adhesive; The flexible solid adhesive is bonded to the outer wall of the battery module; And / or, the flexible solid adhesive is bonded to the inner sidewall of the battery pack housing, and / or, the flexible solid adhesive is bonded to the inner bottom wall of the battery pack housing.

3. The battery pack according to claim 2, characterized in that, The first sealing element further includes a sealing body, the sealing body including a first outer surface; The first outer surface is disposed opposite to the inner sidewall and inner bottom wall of the battery pack housing, and the outer sidewall of the battery module; The flexible solid adhesive includes a first flexible solid adhesive, a first side of which is bonded to the first outer surface, and a second side of which is bonded to the inner sidewall and inner bottom wall of the battery pack housing, as well as the outer sidewall of the battery module.

4. The battery pack according to claim 3, characterized in that, The sealing body has a through mounting hole for external components to pass through. The flexible solid adhesive also includes a second flexible solid adhesive, the first side of which is bonded to the inner wall of the mounting hole, and the second side of which is used to bond to an external component.

5. The battery pack according to claim 3, characterized in that, The inner wall of the battery pack housing includes a first inner side surface, and the outer wall of the battery module includes a first outer side surface. The first inner side and the first outer side are spaced apart and opposite to each other in a first direction, and the first sealing member is disposed between the first inner side and the first outer side; The dimensions of the first inner side and the first outer side in the first direction are the first dimensions, and the dimensions of the sealing body in the first direction are the second dimensions; the first dimension is larger than the second dimension, and the difference between the two dimensions is between 3mm and 10mm, and the first flexible solid adhesive protrudes from the first outer surface by a size between 3mm and 6mm.

6. The battery pack according to any one of claims 3-5, characterized in that, The sealing body includes an elastic block with a Shore hardness between Shore A30 and Shore D50, and the Shore hardness of the flexible solid adhesive is less than that of the elastic block.

7. The battery pack according to claim 1, characterized in that, The filling space includes a second filling space, wherein the upper surface of the battery module is spaced apart from the inner wall of the upper cover of the battery pack housing to form the second filling space; The sealing structure includes at least one second sealing element, wherein the second sealing element is configured as the flexible solid adhesive; The second sealing member is adhered to the upper edge of the battery module and protrudes from the upper surface of the battery module, and the second sealing member is adhered to the inner wall of the upper cover to enclose the filling area between the battery module and the upper cover.

8. The battery pack according to claim 7, characterized in that, The filling space also includes a first filling space, wherein the outer sidewall of the battery module and the inner sidewall of the battery pack housing are spaced apart to form the first filling space; The sealing structure includes at least one first sealing element, which is disposed within the first filling space.

9. The battery pack according to any one of claims 1-5, characterized in that, The flexible solid adhesive includes, but is not limited to, any one of butyl rubber, acrylic adhesive, epoxy resin adhesive, and EPDM rubber.

10. An electrical appliance, characterized in that, The electrical equipment includes the battery pack according to any one of claims 1-9.

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