Battery pack and electric device

Abstract

The application relates to the battery technical field and discloses a battery pack and an electric device, which comprise a box body, a cover body and a battery monomer assembly. The box body comprises a side plate and a containing cavity with an opening surrounded by the side plate; a glue groove is arranged on the side plate, a glue layer is arranged in the glue groove, a ventilation hole is arranged on the outer wall of the side plate, and the ventilation hole is communicated between the glue groove and the outside of the box body. The cover body is arranged on one side of the opening of the box body, the cover body seals the opening and is bonded with the glue layer in the glue groove. After the battery monomer assembly is arranged in the containing cavity, glue is poured into the glue groove. Then, the cover body is arranged on one side of the opening of the box body, so that the cover body seals the opening and the glue groove, and thus, after the glue solidifies to form the glue layer, the cover body can be bonded with the box body through the glue layer. Since the ventilation hole is arranged on the outer wall of the box body and is communicated between the glue groove and the outside of the box body, air can enter the glue groove through the ventilation hole and contact the glue, so that the glue can absorb the water vapor in the air and quickly solidify, and the forming efficiency of the glue layer is improved.

Description

Technical Field

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

[0002] A battery pack is a combination of multiple battery cells connected in series, parallel, or series-parallel configurations, packaged into a single unit to supply electrical energy. It is widely used in electric vehicles, energy storage systems, mobile devices, and other electrical appliances.

[0003] The existing packaging method involves placing battery cells in series, parallel, or series-parallel configurations to form a battery cell assembly in the housing cavity of the casing, filling the glue groove on the casing with glue, and then placing the cover on the casing to seal the housing cavity. The cover also seals the glue groove. After the glue cures, it forms an adhesive layer that bonds the cover to the casing.

[0004] However, because the glue tank is sealed by the cover, the glue layer in the glue tank cures very slowly.

[0005] Therefore, how to solve or improve the problem of low adhesive layer forming efficiency in the adhesive groove of battery pack in related technologies has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, this application provides a battery pack and an electrical device to solve or improve the problem of low adhesive layer forming efficiency in the adhesive groove of the battery pack.

[0007] In a first aspect, this application provides a battery pack, comprising:

[0008] The box includes a side panel and an open receiving cavity enclosed by the side panel. The side panel is provided with a glue groove, and the glue groove is provided with a glue layer. The outer wall of the side panel is provided with a vent hole, and the vent hole connects the glue groove to the outside of the box.

[0009] A cover is provided on the side of the opening on the box body, the cover closes the opening and is bonded to the adhesive layer in the adhesive groove;

[0010] A battery cell assembly is disposed within the receiving cavity.

[0011] Optionally, the vent hole includes a first hole segment and a second hole segment, the first hole segment connecting the glue tank and the second hole segment, and the second hole segment connecting the first hole segment and the outside of the housing; the diameter of the second hole segment is greater than or equal to the diameter of the first hole segment.

[0012] Optionally, the diameter of the second hole gradually increases along the direction extending close to the outer wall of the side plate.

[0013] Optionally, the first hole segment has a uniform aperture structure, and the aperture of the end of the second hole segment connected to the first hole segment is the same as the aperture of the first hole segment.

[0014] Optionally, multiple vent holes are provided, and the multiple vent holes are evenly arranged along the circumference of the side plate.

[0015] Optionally, multiple side plates are provided, each side plate is provided with the glue groove, and the glue grooves are connected to form a ring.

[0016] Optionally, the edge of the cover extends beyond the side plate, and the edge of the cover is provided with a folded edge; the folded edge is located outside the vent hole, and there is a gap between the folded edge and the outer wall of the side plate.

[0017] Optionally, the folded edge is annular and surrounds the outer perimeter of the box body;

[0018] Optionally, the width of the gap is less than the depth of the vent hole.

[0019] Secondly, this application provides an electrical device, including: any of the battery packs described above.

[0020] This application provides a battery pack, including a housing, a cover, and battery cell assemblies. The housing includes side panels and a receiving cavity enclosed by the side panels, the receiving cavity having an opening. An adhesive groove is provided on the side panel. After the battery cell assemblies are placed in the receiving cavity, adhesive is poured into the adhesive groove. Then, the cover is placed on the side of the housing with the opening, so that the cover seals the opening and the adhesive groove, allowing the cover to bond to the housing through the adhesive layer after the adhesive has cured. Because vent holes are provided on the outer wall of the housing, and these vent holes connect the adhesive groove to the outside of the housing, air can enter the adhesive groove through the vent holes and come into contact with the adhesive layer, allowing the adhesive layer to absorb moisture from the air and cure quickly, improving the forming efficiency of the adhesive layer. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is an exploded schematic diagram of a battery pack according to an embodiment of this application;

[0023] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0024] Figure 3 for Figure 2 A magnified view of part B in the diagram;

[0025] Figure 4 This is a schematic diagram of the vent structure of a battery pack according to an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the cover structure of a battery pack according to an embodiment of this application;

[0027] Figure 6 for Figure 5 A magnified view of part of C;

[0028] Figure 7 This is a cutaway schematic diagram of a battery pack according to an embodiment of this application;

[0029] Figure 8 for Figure 7 A magnified view of part of D.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Box body; 11. Side panel; 12. Receiving cavity; 13. Glue groove; 14. Vent hole; 141. First hole section; 142. Second hole section; 2. Cover body; 21. Folded edge; 211. Gap; 3. Glue layer. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc. are used only as illustrative purposes and do not impose numerical requirements or establish an order.

[0034] 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.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can 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.

[0036] 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 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.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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, and therefore should not be construed as a limitation of this application.

[0038] The following is combined Figures 1 to 8 This describes an embodiment of the present application.

[0039] According to an embodiment of this application, a battery pack is provided, including: a housing 1, a cover 2, and a battery cell assembly.

[0040] The housing 1 includes side panels 11 and an open receiving cavity 12 formed by the side panels. A glue groove 13 is provided on the side panel 11, and glue can be filled into the glue groove 13 to form a glue layer 3. A vent hole 14 is provided on the outer wall of the side panel 11, so that the inside of the glue groove 13 is connected to the outside of the housing 1 through the vent hole 14.

[0041] The battery cell is placed inside the receiving cavity 12, and the cover 2 is placed on the side of the opening on the box body 1. The cover 2 can close the opening and the glue groove 13 at the same time.

[0042] During battery pack assembly, after placing the individual battery cells in the receiving cavity 12, glue is injected into the glue tank 13 until it is full. Then, the cover 2 is placed on the housing 1 to close the opening. At this point, the cover 2 seals the glue tank 13 and comes into contact with the glue inside. After the glue solidifies, it forms an adhesive layer 3, which bonds the cover 2 to the housing 1.

[0043] Because the outer wall of the housing 1 has a vent hole 14, and the vent hole 14 connects the glue tank 13 to the outside of the housing 1, air can enter the glue tank 13 through the vent hole 14 and come into contact with the glue, so that the glue can absorb the moisture in the air and cure quickly, which improves the curing speed of the glue and shortens the curing time of the glue layer, thereby improving the assembly efficiency of the battery pack.

[0044] Specifically, multiple side panels 11 are connected to the base plate to form a housing 1. After the multiple side panels 11 surround to form a receiving cavity 12, the top of each side panel 11 surrounds to form an opening of the receiving cavity 12. A glue groove 13 is formed on the top of the side panel 11, so that after the cover 2 is placed on the top of the side panel 11, the cover 2 closes the opening of the receiving cavity 12. At this time, the bottom surface of the cover 2 is in contact with the top surface of the side panel 11, thereby closing the glue groove 13, and the bottom surface of the cover 2 is bonded to the glue layer 3 in the glue groove 13.

[0045] It is worth noting that the vent hole 14 should not be too large. Although the glue tank 13 is connected to the outside air of the box 1 through the vent hole 14, after the glue is poured into the glue tank 13, the glue will not flow out from the vent hole 14 due to the glue's own viscosity and tension, and under the action of atmospheric pressure.

[0046] Moreover, in some embodiments, the vent 14 is inclined upward in the direction of the glue tank 13 near the outer wall of the box 1, which further increases the difficulty of glue flowing out.

[0047] As an optional implementation, the vent 14 includes a first vent segment 141 and a second vent segment 142. The first vent segment 141 communicates with the outside of the housing 1 through the second vent segment 142, and the second vent segment 142 communicates with the glue tank 13 through the first vent segment 141. Air from outside the housing 1 first enters the second vent segment 142, and then flows through the first vent segment 141 to the glue tank 13.

[0048] If the diameter of the second orifice 142 is smaller than the diameter of the first orifice 141, the amount of air entering the first orifice 141 is limited by the diameter of the second orifice 142, resulting in poor airflow.

[0049] In this embodiment, the aperture of the second aperture section 142 is greater than or equal to the aperture of the first aperture section 141, that is, the aperture of the second aperture section 142 is not less than the aperture of the first aperture section 141, thereby avoiding the air volume of the first aperture section 141 being limited by the aperture of the second aperture section 142.

[0050] In an optional embodiment, the diameter of the second hole segment 142 gradually increases in the direction extending near the outer wall of the side plate 11. This makes the second hole segment 142 generally "trumpet-shaped" and expands outward from the inside, which is conducive to the entry of air.

[0051] In a further embodiment, the first hole end has a uniform hole diameter structure, that is, the first hole segment 141 is a straight hole and the hole diameter is the same everywhere.

[0052] The diameter of the end of the second hole segment 142 that connects to the first hole segment 141 is the same as the diameter of the first hole segment 141. Thus, the edge of the hole at the end of the second hole segment 142 that connects to the first hole segment 141 is aligned and connected with the edge of the hole at the end of the first hole segment 141 that connects to the second hole segment 142, making the airflow smoother.

[0053] In a further embodiment, since the diameter of the end of the second hole segment 142 that connects to the first hole segment 141 is the same as the diameter of the first hole segment 141, the diameter of the second hole segment 142 gradually increases in the direction from the glue groove 13 towards the outer wall of the side plate 11. The hole wall of the first hole segment 141 connects with the hole wall of the second hole segment 142 and forms an included angle R. This included angle R can be 120°, or any degree from 120° to 150°, such as 135°.

[0054] If the included angle R is too large, foreign objects can easily enter the second hole section 142; if the included angle R is too small, the benefit to air entry is not obvious. When the included angle R is any degree between 120° and 150°, it not only facilitates air entry but also effectively increases the difficulty for foreign objects to enter.

[0055] As an optional embodiment, multiple vent holes 14 are provided, and the multiple vent holes 14 are evenly distributed along the circumference of the side plate 11, that is, each vent hole 14 is evenly arranged along the extension direction of the glue groove 13. In this way, each vent hole 14 is connected to a different position in the glue groove 13.

[0056] Glue is injected into the glue tank 13 until it is full. Then, the cover 2 is placed on the box body 1 and the opening is closed. At this time, the cover 2 closes the glue tank 13 and comes into contact with the glue. After the glue solidifies, an adhesive layer 3 is formed, and the cover 2 is bonded to the box body 1 through the adhesive layer 3.

[0057] Because the outer wall of the housing 1 has multiple vent holes 14, and each vent hole 14 is connected to different positions of the glue tank 13 and to the outside of the housing 1, air from outside the housing 1 can enter the corresponding position of the glue tank 13 through each vent hole 14, allowing the glue at the corresponding position to absorb moisture from the air and cure quickly. At the same time, the curing speed of the glue in the glue tank 13 is accelerated at different positions, further improving the forming efficiency of the glue layer 3.

[0058] As an optional embodiment, multiple side panels 11 are provided, and the multiple side panels 11 are connected to the base plate to form a housing 1. After the multiple side panels 11 surround to form a receiving cavity 12, the top of each side panel 11 surrounds to form an opening of the receiving cavity 12. Each side panel 11 has a glue groove 13 on its top, so that after the cover 2 is placed on the top of the side panel 11, the cover 2 closes the opening of the receiving cavity 12. At this time, the top surface of the cover 2 is in contact with the top surface of the side panel 11, thereby closing the glue groove 13.

[0059] Since the side panels 11 are connected and arranged in sequence, the glue grooves 13 on each side panel 11 are also interconnected to form a ring. This increases the bonding area between the side panels 11 and the cover 2, and increases the stability of the connection between the side panels 11 and the cover 2.

[0060] As an optional embodiment, after the cover 2 is placed on the box 1 and the opening is closed, the edge of the cover 2 extends beyond the side plate 11, that is, the edge of the cover 2 is located on the side of the side plate 11 away from the receiving cavity 12.

[0061] A flange 21 is provided at the edge of the cover 2, with the flange 21 facing downwards and located outside the vent hole 14 on the side plate 11. Since the edge of the cover 2 extends beyond the side plate 11, there is a gap 211 between the flange 21 and the outer wall of the side plate 11. Air can enter the vent hole 14 after entering the gap 211.

[0062] Furthermore, since the folded edge 21 is located outside the vent hole 14, the folded edge 21 blocks the vent hole 14 in the extending direction of the vent hole 14, so that foreign objects cannot directly enter the vent hole 14 in the extending direction of the vent hole 14, effectively preventing foreign objects from entering the vent hole 14.

[0063] In some embodiments, the edges of the cover 2 are all folded downwards with flanges 21, making the flanges ring-shaped. After the cover 2 is placed on the box 1, the flanges 21 surround the outer perimeter of the box 1. In this case, foreign objects can only enter from the bottom of the gap 211, further increasing the difficulty for foreign objects to enter the gap 211.

[0064] In an optional embodiment, the width of the gap 211 is less than the depth of the vent hole 14. The width of the gap 211 is the distance from the folded edge 21 to the outer wall of the side plate 11, and the depth of the vent hole 14 is the distance from the outer wall of the side plate 11 to the glue groove 13.

[0065] Since the width of the gap 211 is less than the depth of the vent hole 14, even if a foreign object enters the gap 211 and then enters the vent hole 14, it will not be able to contact the glue in the glue tank 13, effectively preventing the glue from being affected by foreign objects and thus affecting the adhesive ability of the glue.

[0066] According to an embodiment of this application, another aspect provides an electrical device including any of the above-mentioned battery packs. The beneficial effects of this electrical device are the same as those of the battery pack, so they will not be described in detail here.

[0067] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A battery pack, characterized by, include: The box body (1) includes a side plate (11) and an open receiving cavity (12) formed by the side plate (11). A glue groove (13) is provided on the side plate (11), and a glue layer (3) is provided in the glue groove (13). A vent hole (14) is provided on the outer wall of the side plate (11), and the vent hole (14) connects the glue groove (13) with the outside of the box body (1). A cover (2) is placed on the side of the opening on the box body (1), the cover (2) closes the opening and is bonded to the adhesive layer (3) in the adhesive groove (13); The battery cell assembly is disposed within the receiving cavity (12).

2. The battery pack of claim 1, wherein, The vent (14) includes a first hole section (141) and a second hole section (142). The first hole section (141) connects the glue tank (13) and the second hole section (142). The second hole section (142) connects the first hole section (141) and the outside of the box (1). The diameter of the second hole section (142) is greater than or equal to the diameter of the first hole section (141).

3. The battery pack of claim 2, wherein, Along the direction extending close to the outer wall of the side plate (11), the diameter of the second hole segment (142) gradually increases.

4. The battery pack of claim 3, wherein, The first hole segment (141) has a uniform aperture structure, and the aperture of the end of the second hole segment (142) connected to the first hole segment (141) is the same as the aperture of the first hole segment (141).

5. The battery pack of claim 1, wherein, Multiple air vents (14) are provided, and the multiple air vents (14) are evenly arranged along the circumference of the side plate (11).

6. The battery pack of claim 1, wherein, Multiple side plates (11) are provided, and each side plate (11) is provided with a glue groove (13), and the glue grooves (13) are connected to form a ring.

7. The battery pack of claim 1, wherein, The edge of the cover (2) extends beyond the side plate (11), and the edge of the cover (2) is provided with a folded edge (21); the folded edge (21) is located outside the vent (14), and there is a gap (211) between the folded edge (21) and the outer wall of the side plate (11).

8. The battery pack of claim 7, wherein, The folded edge (21) is ring-shaped and surrounds the outer perimeter of the box body (1).

9. The battery pack of claim 7, wherein, The width of the gap (211) is less than the depth of the vent (14).

10. An electrical device, characterized by include: The battery pack according to any one of claims 1-9.

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