Battery box, battery pack and electric device

Abstract

The application relates to a battery box, a battery pack and a power utilization device. The battery box comprises a box body, a functional device and a sealing element. The box body comprises a first through hole and a first clamping portion. The first through hole penetrates the inner wall surface and the outer wall surface of the box body along a first direction. The functional device comprises a functional portion and a mounting portion. The mounting portion is arranged around the functional portion. The mounting portion comprises a mounting surface and a second clamping portion. The mounting surface is arranged to face the outer wall surface. The functional portion is arranged to correspond to the first through hole along the first direction. The second clamping portion is clamped with the first clamping portion. The sealing element is arranged between the mounting surface and the outer wall surface and surrounds the first through hole. Compared with the prior art, the functional device is fixed to the box body by means of screws, rivets and the like. The first clamping portion and the second clamping portion are used for clamping to realize quick mounting of the functional device, which helps to improve the production efficiency of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery boxes, battery packs and electrical devices. Background Technology

[0002] Battery pack airtightness is a critical indicator for ensuring vehicle safety. It prevents external moisture from entering the battery pack, avoiding short circuits caused by moisture contacting conductive components such as terminals and busbars, and preventing serious safety accidents such as battery fires and explosions. Electrical connectors and explosion-proof valves, among other functional devices, are installed on the outer wall of the battery pack casing. In related technologies, these functional devices are often fixed to the casing using bolts and rivets, which is cumbersome to install, reduces battery pack production efficiency, and makes it difficult to guarantee the airtightness of the battery pack. Utility Model Content

[0003] Based on this, this application provides a battery box, a battery pack, and an electrical device, which can accelerate the installation of functional components on the battery pack box, improve battery pack production efficiency, and ensure the airtightness of the battery pack.

[0004] In a first aspect, this application proposes a battery box, comprising:

[0005] The housing includes a first through hole and a first snap-fit ​​portion, wherein the first through hole penetrates the inner wall surface and the outer wall surface of the housing along a first direction;

[0006] A functional device includes a functional part and a mounting part, the mounting part being disposed around the functional part, the mounting part including a mounting surface and a second snap-fit ​​part, the mounting surface being disposed facing the outer wall surface, the functional part being disposed corresponding to the first through hole along the first direction, and the second snap-fit ​​part being snap-fitted with the first snap-fit ​​part; and

[0007] A sealing element is disposed between the mounting surface and the outer wall surface, and is arranged around the first through hole.

[0008] In some embodiments, the first snap-fit ​​portion includes a third through hole, which penetrates the inner wall surface and the outer wall surface along the first direction;

[0009] The second snap-fit ​​part snaps into the third through hole.

[0010] In some embodiments, the second snap-fit ​​portion includes a connecting portion and a limiting portion, the connecting portion being disposed on the mounting surface, and the limiting portion being disposed at one end of the connecting portion away from the mounting surface; the connecting portion passes through the third through hole, and the limiting portion extends out of the third through hole;

[0011] The limiting sub-part is configured to be controllably switch between two states: a retracted state and an extended state. The limiting sub-part can be in a retracted state by the action of the third through hole to pass through the third through hole, and switch to an extended state when it extends out of the third through hole.

[0012] In some embodiments, the limiting sub-part includes a plurality of claws, which are spaced apart around the connecting sub-part and together enclose a deformable space;

[0013] During the process of the limiting sub-part switching from the unfolded state to the retracted state, the multiple claws can be squeezed and deformed towards the deformation space to converge.

[0014] In some embodiments, the seal includes a first sealing portion disposed around the first through hole and adhesively connecting the outer wall surface and the mounting surface.

[0015] In some embodiments, the housing includes a groove recessed into the outer wall surface, the groove being disposed around the first through hole;

[0016] The seal includes a first sealing portion, which is at least partially disposed within the groove.

[0017] In some embodiments, the first sealing portion is formed by curing a sealant.

[0018] In some embodiments, the first sealing portion includes a first sealing sub-part and a second sealing sub-part connected to each other. The first sealing sub-part fills the groove, and the second sealing sub-part is located outside the groove and surrounds the first through hole. The second sealing sub-part is bonded to the mounting surface and the outer wall surface.

[0019] In some embodiments, the functional part passes through the first through hole and includes a first mounting end and a second mounting end disposed opposite to each other along the first direction, the second mounting end passing through the first through hole and being at least partially located inside the housing.

[0020] Secondly, this application proposes a battery comprising:

[0021] Battery cells; and

[0022] As described in the first aspect, the battery cell is disposed within the battery box.

[0023] Thirdly, this application proposes an electrical device including a battery pack as described in the second aspect.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] In the aforementioned battery box, battery pack, and electrical device, when installing functional components, the sealing element is first placed on the outer wall surface and surrounds the first through hole. Then, the functional part is aligned with the first through hole on the box body, and the mounting part is engaged with the first engaging part through the second engaging part. The sealing element seals the outer wall surface of the mounting surface, enabling rapid installation of the functional components on the battery box body and ensuring the airtightness of the battery pack. Compared with the prior art, where functional components are fixed to the box body using screws, rivets, etc., this application utilizes the engagement of the first and second engaging parts to achieve rapid installation of functional components, which helps improve the production efficiency and airtightness of the battery pack. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 This is an exploded view of a battery pack according to some embodiments;

[0028] Figure 2 These are schematic diagrams of the structure of a single battery cell in some embodiments;

[0029] Figure 3 for Figure 2 The diagram shows an exploded view of a single battery cell.

[0030] Figure 4 This is a partial structural diagram of the battery box in some embodiments;

[0031] Figure 5 for Figure 4 Another view of the structure shown;

[0032] Figure 6 for Figure 4 An exploded view of the structure shown;

[0033] Figure 7 for Figure 6 Another view of the structure shown;

[0034] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0035] The reference numerals in the detailed embodiments are as follows:

[0036] 1000, Battery pack; 100, Battery box; 10, Box body; 11, First through hole; 12, First snap-fit ​​part; 12a, Third through hole; 13, Inner wall surface; 14, Outer wall surface; 15, Groove; F, First direction; 10a, First part; 10b, Second part; 10A, Inner wall body; 10B, Outer wall body; K, Hollow part; 20, Functional device; 21, Functional part; 21a, First mounting end; 21b, Second mounting end; 22, Mounting part; 22a, Mounting surface; 22c. Second snap-fit ​​part; c1, connecting part; c2, limiting part; c21, claw; c22, deformation space; c211, root; c212, bending part; c23, bending space; 30, sealing element; 31, first sealing part; 31a, first sealing sub-part; 31b, second sealing sub-part; 200, battery cell; 210, housing; 220, end cap; 221, pole post; 230, electrode assembly; 231, tab; 240, insulating film; 250, base; 260, protective film. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that, where they appear, the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, where applicable, 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that, if an element is described as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is described as "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] In order to accelerate the installation of functional components on the battery pack housing and improve the battery pack production efficiency, this application proposes a battery box, a battery pack, and an electrical device.

[0044] The battery pack described in this application is used to provide electrical energy to electrical devices. These devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, energy storage devices, etc. Taking a vehicle as an example, the battery pack can be located at the rear, front, or bottom of the vehicle. The battery pack can provide electrical energy for the vehicle's drive system and also for the vehicle's control system.

[0045] Reference Figure 1The battery pack 1000 in this embodiment includes a battery case 100 and a plurality of battery cells 200, with the battery cells 200 housed within the battery case 100. Further, the battery case 100 includes a housing 10 and functional devices 20. The housing 10 forms a space for accommodating the battery cells 200, and the functional devices 20 are mounted on the housing 10 to enable communication between components within the battery pack 1000 and external devices or to perform other functions. The functional devices 20 may be high-voltage input / output interfaces, DC fast charging interfaces, low-voltage control and communication interfaces, thermal management self-sealing connectors, pressure relief valves, etc.

[0046] In one embodiment, such as Figure 1 As shown, the housing 10 includes a first part 10a and a second part 10b, which together form the internal space of the housing 10. The functional device 20 can be installed in the first part 10a or in the second part 10b. In a further embodiment, the second part 10b forms the internal space of the housing 10, and one end of the space is open. The first part 10a covers the second part 10b to seal the space.

[0047] The battery cell 200 is the smallest unit in the battery where electrochemical reactions take place, and it can be a secondary battery or a primary battery. The battery cell 200 can be a lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 200 can be cylindrical, flat, cuboid, or other shapes.

[0048] In some embodiments, refer to Figure 2 and Figure 3 The battery cell 200 includes a housing 210, an end cap 220, and an electrode assembly 230. The housing 210 and the end cap 220 together form an internal space for accommodating the electrode assembly 230. Specifically, the housing 210 may have a receiving cavity formed therein, with at least one end open. The end cap 220 closes onto the open end of the housing 210 to seal the receiving cavity, and the electrode assembly 230 is mounted within the receiving cavity. The housing 210 may be, but is not limited to, a metal housing 210, such as an aluminum housing or a steel housing.

[0049] In some embodiments, continue to refer to Figure 3The battery cell 200 also includes a protective film 260, which wraps around the outside of the housing 210 and provides insulation, protection against impacts and scratches to the housing 210. In a further example, a base support 250 plate is provided at the bottom of the housing 210, supporting the electrode assembly 230. This base support 250 plate is positioned between the housing 210 and the electrode assembly 230 to prevent interference between the bottom corners of the electrode assembly 230 and the housing 210, and to enhance the strength of the bottom of the housing 210, preventing damage to the electrode assembly 230 when the bottom of the housing 210 is impacted. Optionally, an insulating film 240 is wrapped around the outside of the electrode assembly 230 to insulate the electrode assembly 230 from the housing 210. Further optionally, an insulating film 240 is also provided between the electrode assembly 230 and the end cap 220 to reduce the risk of leakage from the battery cell 200.

[0050] The battery cell 200 can be a liquid battery or a solid-state battery. If the battery cell 200 is a liquid battery, in some embodiments, the electrode assembly 230 includes a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes. A liquid electrolyte (i.e., electrolyte solution) can be injected into the battery cell 200. The electrolyte solution wets the interior of the electrode assembly 230, providing an ion migration pathway for the electrochemical reaction in the electrode assembly 230 and serving a conductive function. The electrode assembly 230 can be in the form of a wound type, a stacked type, etc. One or more electrode assemblies 230 can be installed inside the battery cell 200. In one embodiment, an explosion-proof valve is provided on the end cap 220. The explosion-proof valve can release pressure when the internal pressure of the battery cell 200 reaches a threshold, preventing the battery cell 200 from exploding. In a further example, an injection hole is provided on the end cap 220 for filling the battery cell 200 with electrolyte. If the battery cell 200 is a solid-state battery, compared with a liquid battery, its electrolyte is solid and placed between the positive and negative electrodes. In this case, the design of the liquid injection hole on the end cap 220 is usually omitted.

[0051] The battery box 100 in this application is described in detail below.

[0052] Please refer to Figure 4 , Figure 5 and Figure 6 The battery box 100 in this embodiment includes a box body 10, a functional component 20, and a sealing component 30. The box body 10 includes a first through hole 11 and a first snap-fit ​​portion 12. The first through hole 11 penetrates the inner wall surface 13 and the outer wall surface 14 of the box body 10 along a first direction F. The functional component 20 includes a functional part 21 and a mounting part 22, with the mounting part 22 surrounding the functional part 21. The mounting part 22 includes a mounting surface 22a and a second snap-fit ​​portion 22c. The mounting surface 22a faces the outer wall surface 14. The functional part 21 is correspondingly positioned to the first through hole 11 along the first direction F, and the second snap-fit ​​portion 22c snaps into the first snap-fit ​​portion 12. The sealing component 30 is disposed between the mounting surface 22a and the outer wall surface 14 and surrounds the first through hole 11.

[0053] Functional unit 21 is used to implement the function of functional device 20. For example, if functional device 20 is a high-voltage input / output interface or a low-voltage control and communication interface, functional unit 21 is a plug-in structure for implementing high-voltage input / output or low-voltage control and communication. If functional device 20 is a pressure relief valve, then functional unit 21 is a valve body structure for implementing pressure relief.

[0054] The inner wall surface 13 and the outer wall surface 14 are two surfaces on the housing 10 that are arranged opposite to each other along a first direction F. Depending on the different positions of the inner wall surface 13 and the outer wall surface 14, the first direction F corresponds to the wall thickness direction at different positions of the housing 10. A first through hole 11 is provided through the housing 10 along its wall thickness direction. The functional part 21 corresponds to the first through hole 11. In one embodiment, the functional part 21 passes through the first through hole 11 and is partially located inside the housing 10. In another embodiment, the functional part 21 does not pass through the first through hole 11 and is completely located outside the housing 10. The specific arrangement depends on the specific type of the functional device 20.

[0055] Mounting portion 22 is used to mount functional component 20 onto housing 10. Generally, housing 10 has a frame, and functional component 20 is mounted on the frame via mounting portion 22. Mounting portion 22 is arranged in a ring shape around functional component 21, such as a circular ring or a square ring. Functional component 21 is located inside mounting portion 22 and should be sealed to prevent moisture from entering housing 10 through the connection. Mounting portion 22 and functional component 21 are generally integrally connected. Typically, the shape of first through hole 11 matches the shape of mounting portion 22. If mounting portion 22 is a circular ring, first through hole 11 is designed as a circular hole. If mounting portion 22 is a square ring, first through hole 11 is designed as a square hole.

[0056] The mounting section 22 includes a mounting surface 22a, which is disposed opposite to the outer wall surface 14. The mounting surface 22a is an annular surface that surrounds the periphery of the first through hole 11 and is opposite to the outer wall surface 14 surrounding the first through hole 11. A sealing element 30 is provided between the mounting surface 22a and the outer wall surface 14 to prevent moisture from entering the housing 10 through the interface between the mounting surface 22a and the outer wall surface 14.

[0057] The housing 10 is provided with a first snap-fit ​​part 12, and the mounting part 22 is provided with a second snap-fit ​​part 22c. The first snap-fit ​​part 12 and the second snap-fit ​​part 22c are snapped together. For example, the first snap-fit ​​part 12 has a slot, and the second snap-fit ​​part 22c has a protrusion. When the protrusion is inserted into the slot, the first snap-fit ​​part 12 and the second snap-fit ​​part 22c are snapped together.

[0058] When installing the functional device 20 in the battery box 100 described above, the sealing member 30 is first placed on the outer wall surface 14 and surrounds the first through hole 11. Then, the functional part 21 is aligned with the first through hole 11 on the box body 10, and the mounting part 22 is engaged with the first engaging part 12 through the second engaging part 22c. The sealing member 30 seals the outer wall surface 14 of the mounting surface 22a, thereby achieving rapid installation of the functional device 20 on the box body 10 of the battery box 100. Compared with the prior art, where the functional device 20 is fixed to the box body 10 using screws, rivets, etc., this application utilizes the engagement of the first engaging part 12 and the second engaging part 22c to achieve rapid installation of the functional device 20, which helps to improve the production efficiency of the battery pack 1000.

[0059] It is worth noting that the arrangement of the inner wall surface 13 and the outer wall surface 14 can be varied, depending on the structure of the housing 10. Viewed from the inside of the housing 10, the inner wall surface 13 is exposed. Similarly, viewed from the outside of the housing 10, the outer wall surface 14 is exposed. In practical applications, the frame of the housing 10 is often a profile frame, which has an outer wall body 10B and an inner wall body 10A spaced apart along a first direction F, with a hollow space between the outer wall body 10B and the inner wall body 10A, forming a hollow portion K of the profile frame. If the functional device 20 is installed in this hollow portion, in one embodiment, the inner wall surface 13 of the housing 10 is the surface of the inner wall body 10A of the hollow portion K facing the inside of the housing 10. In another embodiment, the inner wall 10A of the hollow portion K is provided with a clearance hole, and the inner side of the outer wall 10B of the hollow portion serves as the aforementioned inner wall surface 13. As long as the first through hole 11 is positioned opposite to the clearance hole, the functional part 21 can be exposed, facilitating the connection between the functional part 21 and the internal components of the housing 10.

[0060] Similarly, if the functional device 20 is installed in the hollow portion, in one embodiment, the outer wall surface 14 of the housing 10 can be the surface of the outer wall body 10B of the hollow portion K facing the outside of the housing 10. In another embodiment, the outer wall body 10B of the hollow portion K is machined with a clearance hole, and the outer side of the inner wall body 10A of the hollow portion serves as the aforementioned outer wall surface 14. As long as the first through hole 11 is arranged opposite to the clearance hole, the functional device 20 can be exposed, so as to facilitate the installation of the functional device 20 on the outer wall surface 14.

[0061] In some embodiments, refer to Figure 6 and Figure 7 The first engaging portion 12 includes a third through hole 12a, which penetrates the inner wall surface 13 and the outer wall surface 14 along the first direction F. The second engaging portion 22c engages with the third through hole 12a.

[0062] Generally, the first snap-fit ​​portion 12 includes a plurality of third through holes 12a, which are arranged around the first through hole 11. Figure 6In the illustrated embodiment, two third through holes 12a are provided and arranged symmetrically. When the second snap-fit ​​part 22c snaps into the third through hole 12a, the mounting part 22 is fixed to the housing 10.

[0063] At this point, the first snap-fit ​​part 12 and the second snap-fit ​​part 22c have simple structures, are easy to implement, and are more economical.

[0064] In a further embodiment, refer to Figure 8 The second latching portion 22c includes a connecting sub-part c1 and a limiting sub-part c2. The connecting sub-part c1 is disposed on the mounting surface 22a, and the limiting sub-part c2 is disposed at the end of the connecting sub-part c1 opposite to the mounting surface 22a. The connecting sub-part c1 passes through a third through hole 12a, and the limiting sub-part c2 extends out of the third through hole 12a. The limiting sub-part c2 is configured to be controllably switchable between a controlled state and an unfolded state. The limiting sub-part c2 can be in a retracted state by the action of the third through hole 12a to pass through the third through hole 12a, and can switch to an unfolded state when it extends out of the third through hole 12a.

[0065] The connecting part c1 is roughly cylindrical, and its size is similar to or slightly smaller than that of the third through hole 12a, so as to facilitate the insertion of the connecting part c1 into the third through hole 12a.

[0066] When the second engaging part 22c passes through the third through hole 12a, the limiting part c2 first passes through the third through hole 12a and is squeezed by the third through hole 12a, switching to a retracted state. In the retracted state, the outer contour size of the limiting part c2 becomes smaller, making it easier to pass through the third through hole 12a. After the limiting part c2 passes through the third through hole 12a, the connecting part c1 is located inside the third through hole 12a. As the squeezing force of the third through hole 12a is released, the limiting part c2 returns to the unfolded state. The contour size of the limiting part in the unfolded state is larger than the size of the third through hole 12a, and the limiting part c2 cannot come out of the third through hole 12a, thus realizing the mutual engagement between the second engaging part 22c and the third through hole 12a.

[0067] To prevent moisture from seeping through the gap between the connecting part c1 and the third through hole 12a, a seal 30 can be provided between the connecting part c1 and the third through hole 12a, or other sealing measures can be taken, such as providing a sealing groove on the outer wall surface 14, with the sealing groove surrounding the third through hole 12a. When the sealing ring is installed in the sealing groove, it seals the connection between the connecting part c1 and the outer wall surface 14 to ensure the airtightness of the battery pack.

[0068] In a further embodiment, reference continues to be made to... Figure 8The limiting sub-part c2 includes multiple claws c21, which are spaced apart around the connecting sub-part c1 and together enclose a deformation space c22. During the process of the limiting sub-part c2 switching from the unfolded state to the retracted state, the multiple claws c21 can be squeezed and deformed towards the deformation space c22 to converge.

[0069] Each claw c21 is integrally formed with the connecting sub-part c1. The claws c21 are arranged on the edge region of the connecting sub-part c1, while the central region of the connecting sub-part c1 is left empty to form a deformation space c22. There are gaps between adjacent claws c21. During the insertion of the limiting sub-part c2 into the third through hole 12a, the claws c21 are compressed against the wall of the third through hole 12a, causing them to bend and converge towards the central deformation space c22. The gaps between the claws c21 are used to reserve space for each claw c21 to deform towards the center.

[0070] In one embodiment, the claw c21 includes a root c211 and a bent portion c212. The root c211 is connected to the connecting sub-part c1, and the bent portion c212 is connected to the end of the root c211 that is opposite to the connecting sub-part c1, and is bent relative to the root c211 toward the side where the connecting sub-part c1 is located. A bending space c23 exists between the bent portion c212 and the root c211. In the unfolded state, due to the existence of the bending space c23, the maximum size of the contour projection of the limiting sub-part c2 along the first direction F is greater than the size of the third through hole 12a, so that the connecting sub-part c1 cannot disengage from the third through hole 12a. In the folded state, the bent portion c212 is compressed and deforms toward the root portion c211, and the bending space c23 decreases until it disappears. At the same time, the root portion c211 bends and deforms toward the middle deformation space c22. The combination of the two greatly reduces the size of the contour projection of the limiting portion c2 along the first direction F, so that the limiting portion c2 can pass smoothly through the third through hole 12a.

[0071] In some embodiments, refer to Figure 6 and Figure 7 The sealing element 30 includes a first sealing part 31, which is disposed around the first through hole 11 and is adhesively connected to the outer wall surface 14 and the mounting surface 22a to further improve the sealing performance.

[0072] The first sealing part 31 can be a sealing structure with an adhesive coating on its surface, such as a rubber ring or silicone ring. In this case, the sealing element 30 not only has a sealing function, but also adheres to the outer wall surface 14 and the mounting surface 22a, achieving multiple benefits. This strengthens the connection between the mounting part 22 and the housing 10, and also prevents the sealing element 30 from loosening due to unstable engagement of the first snap-fit ​​part 12 and the second snap-fit ​​part 22c, thus helping to improve the sealing effect.

[0073] In some embodiments, refer to Figure 6The housing 10 includes a groove 15 recessed into the outer wall surface 14 and surrounding the first through hole 11. The seal 30 includes a first sealing portion 31, which is at least partially disposed within the groove 15.

[0074] That is, at least a portion of the seal 30 is embedded in the groove 15 to improve the installation stability of the seal 30. The tortuous groove wall of the groove 15 is equivalent to extending the path of water vapor into the housing 10, which can also enhance the sealing effect.

[0075] In one embodiment, the first sealing part 31 is formed by curing sealant. In practical application, sealant is first injected into the groove 15, the functional part 21 is aligned with the first through hole 11, and the mounting surface 22a is pressed onto the outer wall surface 14. After the sealant cures, a sealing element 30 is formed that bonds the mounting surface 22a and the outer wall surface 14.

[0076] In one specific embodiment, reference is made to Figure 7 The first sealing part 31 includes a first sealing sub-part 31a and a second sealing sub-part 31b connected to each other. The first sealing sub-part 31a is filled in the groove 15, and the second sealing sub-part 31b is located outside the groove 15 and surrounds the first through hole 11. The second sealing sub-part 31b is bonded to the mounting surface 22a and the outer wall surface 14.

[0077] At this time, the first sealing sub-part 31a is embedded in the groove 15, which improves the installation stability of the sealing element 30. The second sealing sub-part 31b seals between the mounting surface 22a and the outer wall surface 14, increasing the bonding area and sealing area between the mounting surface 22a and the outer wall surface 14, making the installation of the functional device 20 more reliable and the sealing effect significant.

[0078] Can the first sealing sub-part 31a and the second sealing sub-part 31b be formed by curing sealant? After filling the groove 15 with sealant, when installing the functional part 21, under the pressure of the mounting surface 22a, a certain amount of sealant overflows from the sealing groove and adheres between the mounting surface 22a and the outer wall surface 14, curing to form the second sealing sub-part 31b, while the portion of sealant remaining in the sealing groove cures to form the first sealing sub-part 31a.

[0079] In some embodiments, refer to Figure 4 The functional part 21 passes through the first through hole 11 and includes a first mounting end 21a and a second mounting end 21b disposed opposite to each other along the first direction F. The second mounting end 21b passes through the first through hole 11 and is at least partially located inside the housing 10.

[0080] The first mounting end 21a is used for mounting wire harnesses or connectors for connection to external devices, and the second mounting end 21b is used for mounting wire harnesses or connectors for connection to internal components of the enclosure 10. The specific forms of the first mounting end 21a and the second mounting end 21b are not limited. For example, the first mounting end 21a may be provided with a connector terminal for insertion into the connection terminal of an external device. The second mounting end 21b may be provided with a connecting piece for fastening to the conductive busbar on the high-voltage side of the enclosure 10 using bolts.

[0081] At this time, the second mounting end 21b of the functional unit 21 is at least partially located inside the housing 10, which facilitates connection with the internal components of the housing 10.

[0082] In one specific embodiment of this application, the battery box 100 includes the aforementioned box body 10, functional device 20, and sealing member 30. A first through hole 11 is provided on the side frame of the box body 10. The mounting part 22 of the functional device 20 is installed at the first through hole 11, and its mounting surface 22a is disposed opposite to the outer wall surface 14 and clamps the sealing member 30. A groove 15 is provided on the outer wall surface 14 surrounding the first through hole 11. The sealing member 30 is formed by the curing of sealant filled in the groove 15.

[0083] Furthermore, the battery pack 1000 proposed in this application embodiment includes a battery cell 200 and a battery case 100 as described in the above embodiments, with the battery cell 200 disposed within the case 10. This battery pack 1000 possesses all the beneficial effects described in the above embodiments.

[0084] In addition, the electrical device proposed in this application embodiment includes the battery pack 1000 in the above embodiment, which has all the beneficial effects described in the above embodiment.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery box (100), characterized in that, include: The housing (10) includes a first through hole (11) and a first snap-fit ​​portion (12), wherein the first through hole (11) penetrates the inner wall surface (13) and the outer wall surface (14) of the housing (10) along a first direction (F); A functional device (20) includes a functional part (21) and a mounting part (22). The mounting part (22) is disposed around the functional part (21). The mounting part (22) includes a mounting surface (22a) and a second snap-fit ​​part (22c). The mounting surface (22a) is disposed facing the outer wall surface (14). The functional part (21) is disposed corresponding to the first through hole (11) along the first direction (F). The second snap-fit ​​part (22c) snaps into the first snap-fit ​​part (12). A sealing element (30) is disposed between the mounting surface (22a) and the outer wall surface (14) and surrounds the first through hole (11).

2. The battery box (100) according to claim 1, characterized in that, The first snap-fit ​​portion (12) includes a third through hole (12a), which penetrates the inner wall surface (13) and the outer wall surface (14) along the first direction (F); The second snap-fit ​​part (22c) snaps into the third through hole (12a).

3. The battery box (100) according to claim 2, characterized in that, The second snap-fit ​​portion (22c) includes a connecting sub-part (c1) and a limiting sub-part (c2). The connecting sub-part (c1) is disposed on the mounting surface (22a), and the limiting sub-part (c2) is disposed at the end of the connecting sub-part (c1) opposite to the mounting surface (22a). The connecting sub-part (c1) passes through the third through hole (12a), and the limiting sub-part (c2) extends out of the third through hole (12a). The limiting sub-part (c2) is configured to be controllably switch between two states: a retracted state and an extended state. The limiting sub-part (c2) can be in a retracted state by the action of the third through hole (12a) to pass through the third through hole (12a), and switch to an extended state when it extends out of the third through hole (12a).

4. The battery box (100) according to claim 3, characterized in that, The limiting sub-part (c2) includes multiple claws (c21), which are spaced apart around the connecting sub-part (c1) and together enclose a deformable space (c22). During the process of the limiting sub-part (c2) switching from the unfolded state to the retracted state, the plurality of claws (c21) can be squeezed and deformed towards the deformation space (c22) to converge.

5. The battery box (100) according to claim 1, characterized in that, The sealing element (30) includes a first sealing part (31) which is disposed around the first through hole (11) and is adhesively connected to the outer wall surface (14) and the mounting surface (22a).

6. The battery box (100) according to any one of claims 1 to 5, characterized in that, The housing (10) includes a groove (15) recessed into the outer wall surface (14) and the groove (15) is arranged around the first through hole (11); The seal (30) includes a first sealing portion (31), which is at least partially disposed within the groove (15); The first sealing part (31) is formed by curing sealant.

7. The battery box (100) according to claim 6, characterized in that, The first sealing part (31) includes a first sealing sub-part (31a) and a second sealing sub-part (31b) connected to each other. The first sealing sub-part (31a) fills the groove (15), and the second sealing sub-part (31b) is located outside the groove (15) and is disposed around the first through hole (11). The second sealing sub-part (31b) is bonded to the mounting surface (22a) and the outer wall surface (14).

8. The battery box (100) according to any one of claims 1 to 5, characterized in that, The functional part (21) passes through the first through hole (11) and includes a first mounting end (21a) and a second mounting end (21b) disposed opposite to each other along the first direction (F). The second mounting end (21b) passes through the first through hole (11) and is at least partially located inside the housing (10).

9. A battery pack (1000), characterized in that, include: Battery cell (200); and The battery box (100) as described in any one of claims 1 to 8, wherein the battery cell (200) is disposed within the box body (10).

10. An electrical device, characterized in that, Includes the battery pack (1000) as described in claim 9.

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