Battery pack, battery module, and electric device

Abstract

The present application discloses a battery pack, a battery module, and an electric device. The battery pack comprises a case, a first opening, a first guide member, a first connector, and a second connector. The case comprises a bottom wall and a top wall arranged in a first direction. The first guide member is disposed on the top wall. The first opening is formed on the bottom wall. The first connector is disposed on the top wall. The second connector is disposed on the bottom wall. The first guide member and the first opening are configured such that when two battery packs are stacked in the first direction, the first guide member of one battery pack is inserted into the first opening of the other battery pack, and the first connector of the one battery pack is connected to the second connector of the other battery pack. When a plurality of battery packs are stacked, the first guide members are inserted into the first openings for guiding, which facilitates connection between the first connectors and the second connectors and is beneficial to improving the assembly efficiency.

Description

Battery packs, battery modules and electrical equipment Technical Field

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

[0002] Battery modules are currently widely used in drones, electric vehicles, energy storage devices, and other fields. While multiple battery packs are currently combined to meet usage requirements, stacking and connecting these packs is inconvenient, resulting in low assembly efficiency and impacting usability.

[0003] Summary of the Invention

[0004] In view of this, it is necessary to provide a battery pack, battery module and electrical equipment that facilitates battery pack stacking and connection and improves assembly efficiency.

[0005] Embodiments of this application provide a battery pack, including a housing, a first opening, a first guide, a first connector, and a second connector. The housing includes a bottom wall and a top wall arranged along a first direction. The first guide is disposed on the top wall. The first opening is disposed on the bottom wall. The first connector is disposed on the top wall. The second connector is disposed on the bottom wall. The first guide and the first opening are configured such that when two battery packs are stacked along the first direction, the first guide of one battery pack is inserted into the first opening of the other battery pack, and the first connector of the one battery pack is connected to the second connector of the other battery pack. When multiple battery packs are stacked, the first guide at the first opening facilitates the connection between the first connector and the second connector, thereby improving assembly efficiency.

[0006] In one or more of the above optional embodiments, along the first direction, the first guide extends beyond the first connector to protect the first connector, so that the first guide contacts the bottom wall first, reducing the risk of the first connector being damaged by bumps during the stacking process.

[0007] In one or more of the above optional embodiments, a first seal is included, which is connected to the top wall and surrounds the outer periphery of the first guide, thereby improving the sealing between stacked battery packs.

[0008] In one or more of the above optional embodiments, a second seal is included, which connects to the top wall and surrounds the outer periphery of the first connector. The second seal seals the mating position of the first and second connectors, further improving the sealing performance of the stacked battery pack.

[0009] In one or more of the above optional embodiments, the first seal extends beyond the second seal along the first direction. When two battery packs are stacked, the first seal protects the second seal, reducing the risk of damage to the second seal affecting the seal.

[0010] In one or more of the above optional embodiments, the hardness of the first seal is greater than that of the second seal, thereby further protecting the second seal.

[0011] In one or more of the above optional embodiments, the first sealant includes EPDM rubber and the second sealant includes foamed silicone, which helps to improve the sealing performance.

[0012] In one or more of the above optional embodiments, the outer periphery of the first guide member is provided with a first recess, and a part of the first seal member is provided in the first recess, which facilitates the installation and positioning of the first seal member and reduces the possibility of displacement of the first seal member and detachment from the first guide member during assembly and use.

[0013] In one or more of the above optional embodiments, the first opening is set from large to small along the first direction. The first opening is configured such that two battery packs are stacked along the first direction, and the first seal is connected to the inner surface of the first opening, which helps to improve the sealing between the stacked battery packs.

[0014] In one or more of the above optional embodiments, the top wall is provided with a second recess, and a portion of the second seal is disposed in the second recess.

[0015] In one or more of the above optional embodiments, the bottom wall is provided with a receiving recess, which is configured such that two battery packs are stacked along a first direction, and the top wall of one battery pack is disposed in the receiving recess of the other battery pack. This helps to reduce the stacking volume and improve the sealing and connection stability between the two battery packs.

[0016] In one or more of the above optional embodiments, the bottom surface of the receiving recess is provided with a receiving cavity, and the second connector is disposed in the receiving cavity. The second connector does not protrude from the receiving cavity in a direction opposite to the first direction. This helps to reduce the stacking height and improve sealing performance.

[0017] In one or more of the above optional embodiments, the number of first guide members is at least two. When viewed along a third direction, the at least two first guide members are arranged along a second direction. Along the second direction, the projections of the at least two first guide members are opposite, and the first direction, the second direction, and the third direction are perpendicular to each other. This facilitates the positioning of two battery packs and makes it easier to stack the battery packs.

[0018] Embodiments of this application provide a battery module including two battery packs from any of the above embodiments. The two battery packs are stacked along a first direction. A first guide member of one battery pack is inserted into a first opening of the other battery pack, and a first connector of one battery pack is connected to a second connector of the other battery pack. The first guide member, positioned at the first opening, facilitates the connection between the first and second connectors, thereby improving assembly efficiency.

[0019] In one or more of the above optional embodiments, each battery pack further includes a first seal, which is connected to the top wall and surrounds the outer periphery of the first guide. The first seal of one battery pack is connected to the inner surface of the first opening of the other battery pack. By sealing the top wall of one battery pack and the bottom wall of another battery pack with the first seal, the first opening is sealed, improving the sealing performance of the battery module.

[0020] In one or more of the above optional embodiments, each battery pack further includes a second seal that connects to the top wall and surrounds the outer periphery of the first connector. The second seal seals the connecting top wall and the bottom wall of the other battery pack, further improving the sealing performance of the battery module.

[0021] The embodiments of this application provide an electrical device, including the battery pack or battery module in any of the above embodiments.

[0022] When multiple battery packs, battery modules, and electrical devices are stacked, the first guide member is positioned at the first opening for guidance, which facilitates the connection between the first connector and the second connector and helps improve assembly efficiency. Attached Figure Description

[0023] Figure 1 shows a schematic diagram of the battery pack structure in some embodiments.

[0024] Figure 2 shows a schematic diagram of the battery pack from another perspective in some embodiments.

[0025] Figure 3 shows a schematic diagram of the stacked battery pack in some embodiments.

[0026] Figure 4 shows a schematic diagram of the battery pack from another perspective in some embodiments.

[0027] Figure 5 shows a schematic diagram of the stacked battery pack from another perspective in some embodiments.

[0028] Figure 6 shows a cross-sectional schematic diagram of the stacked battery pack in Figure 5.

[0029] Figure 7 shows an enlarged schematic diagram of point A in Figure 6.

[0030] Figure 8 shows an enlarged schematic diagram of point B in Figure 6.

[0031] Figure 9 shows a schematic diagram of the structure of the first guide member in some embodiments.

[0032] Figure 10 shows a schematic diagram of the electrical equipment in some embodiments.

[0033] Key component symbols: Battery pack 100; Housing 10; Top wall 11; Top wall opening 111; Second recess 112; First side 11a; Second side 11b; Bottom wall 12; Receiving recess 12a; First opening 121; Conical surface 121a; First cross section 121b; Receiving cavity 12b; First side wall 13; Second side wall 14; Third side wall 15; Fourth side wall 16; First guide 20; First recess 21; First end 20a; Opening 201; Second end 20b; Second cross section 20c; First seal 30; First connector 40; Second connector 50; Second seal 60; Battery module 200; Electrical device 300; First direction X; Second direction Y; Third direction Z.

[0034] The following specific embodiments will further illustrate this application in conjunction with the above-described accompanying drawings. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0036] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have a component that is centrally located. When a component is considered to be "set" or "located" on another component, it can be directly set on the other component or may also have a component that is centrally located.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] It should be understood that, considering actual machining tolerances, the term "perpendicular" in the technical solution of this application is used to describe the ideal state between two components. In actual production or use, two components may exist in a state that is approximately perpendicular. For example, combined with numerical description, perpendicularity can refer to the angle between two straight lines within the range of 90°±10°, perpendicularity can also refer to the dihedral angle between two planes within the range of 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane within the range of 90°±10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes, but can be approximately straight lines or planes. From a macroscopic perspective, if the overall extension direction is a straight line or plane, the component can be considered a "straight line" or "plane".

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0040] Unless otherwise defined, the term "multiple" in this document, when used to describe the number of components, specifically means that the number of components is two or more.

[0041] In the first direction X, it includes along the first direction X and along the direction opposite to the first direction X; in the second direction Y, it includes along the second direction Y and along the direction opposite to the second direction Y; in the third direction Z, it includes along the third direction Z and along the direction opposite to the third direction Z.

[0042] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0043] Please refer to Figures 1 to 6. One embodiment of this application provides a battery pack 100, including a housing 10. The housing 10 includes a top wall 11 and a bottom wall 12, which are arranged along a first direction X.

[0044] In some embodiments, the battery pack 100 includes a first guide 20 disposed on the top wall 11.

[0045] In some embodiments, the battery pack 100 includes a first opening 121, which is disposed on the bottom wall 12 and extends through the bottom wall 12 along a first direction X.

[0046] In some embodiments, the battery pack 100 includes a first connector 40 disposed on the top wall 11.

[0047] In some embodiments, the battery pack 100 includes a second connector 50 disposed on the bottom wall 12.

[0048] In some embodiments, the first guide 20 and the first opening 121 are configured such that two battery packs 100 are stacked along a first direction X, the first guide 20 of one battery pack 100 is inserted into the first opening 121 of the other battery pack 100, and the first connector 40 of the one battery pack 100 is connected to the second connector 50 of the other battery pack 100.

[0049] When multiple battery packs 100 are stacked, the first guide 20 is provided in the first opening 121 for guidance, which facilitates the connection between the first connector 40 and the second connector 50 and helps to improve assembly efficiency.

[0050] In some embodiments, along the first direction X, the first guide 20 extends beyond the top wall 11, and the first connector 40 extends beyond the top wall 11 along the first direction X. The first guide 20 extends beyond the first connector 40 to protect the first connector 40, so that the first guide 20 contacts the bottom wall 12 first, reducing the risk of the first connector 40 being damaged by bumps during the stacking process.

[0051] In some embodiments, along the first direction X, the height of the first guide 20 above the first connector 40 is at least half the height of the first guide 20 above the top wall 11, further reducing the risk of the first connector 40 being damaged by impact during stacking.

[0052] In some embodiments, the number of first guide members 20 is at least two. When viewed along the third direction Z, at least two first guide members 20 are arranged along the second direction Y. Along the second direction Y, the projections of the at least two first guide members 20 are opposite each other, such that the at least two first guide members 20 are arranged diagonally opposite each other, which is beneficial for positioning the two battery packs 100 and for stacking the battery packs 100. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0053] Referring to Figures 4 and 5, taking a battery pack 100 including two first guide members 20 as an example, in some embodiments, along the second direction Y, the top wall 11 includes a first side 11a and a second side 11b. Along the second direction Y, the distance h1 between the first guide member 20 near the first side 11a and the first side 11a is less than the distance h2 between the two first guide members 20, and the distance h3 between the first guide member 20 near the second side 11b and the second side 11b is less than the distance h2 between the two first guide members 20. This ensures that one of the first guide members 20 is as close as possible to the first side 11a, and the other first guide member 20 is as close as possible to the second side 11b, thereby improving the connection effect of the first guide members 20 on the stacked battery pack 100. Optionally, h1 is less than 1 / 2h2, and h3 is less than 1 / 2h2. Optionally, h1 is less than 1 / 4h2, and h3 is less than 1 / 4h2.

[0054] In some embodiments, along the second direction Y, the first guide member 20 and the first connector 40 are arranged at intervals near the first connector 40. Along the second direction Y, the distance between the first guide member 20 and the first connector 40 is H, 20mm ≤ H ≤ 50mm, which brings the first guide member 20 close to the first connector 40, increasing the protection of the first connector 40. H can be any one or any combination of 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, and 50mm.

[0055] Referring to Figures 1 and 2, in some embodiments, the housing 10 includes a first sidewall 13 and a second sidewall 14 arranged along a second direction Y, the first sidewall 13 connecting the top wall 11 and the bottom wall 12, and the second sidewall 14 connecting the top wall 11 and the bottom wall 12.

[0056] In some embodiments, the housing 10 includes a third sidewall 15 and a fourth sidewall 16 arranged along a third direction Z. The third sidewall 15 connects the top wall 11, the bottom wall 12, the first sidewall 13 and the second sidewall 14, and the fourth sidewall 16 connects the top wall 11, the bottom wall 12, the first sidewall 13 and the second sidewall 14, forming an accommodating space.

[0057] In some embodiments, the battery pack 100 includes a cell assembly (not shown) disposed within a receiving space. A first connector 40 and a second connector 50 connect the cell assembly.

[0058] In some embodiments, along the first direction X, the top wall 11 protrudes from the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16.

[0059] Please refer to Figures 2 and 6. In some embodiments, the bottom wall 12 is provided with a receiving recess 12a. When two battery packs 100 are stacked along the first direction X, the top wall 11 of one battery pack 100 is located in the receiving recess 12a of the other battery pack 100, which helps to reduce the stacking volume and improve the sealing and connection stability between the two battery packs 100.

[0060] Please refer to Figures 2 and 6. In some embodiments, the bottom surface of the receiving recess 12a is provided with a receiving cavity 12b, and the second connector 50 is disposed in the receiving cavity 12b. In the direction opposite to the first direction X, the second connector 50 does not protrude from the receiving cavity 12b, which helps to reduce the stacking height and improve the sealing performance.

[0061] Referring to Figures 6 to 9, in some embodiments, the battery pack 100 includes a first seal 30, which connects to the bottom wall 12 and surrounds the outer periphery of the first guide 20. When two battery packs 100 are stacked along a first direction X, the first guide 20 of one battery pack 100 is inserted into the first opening 121 of the other battery pack 100, and the first seal 30 seals the top wall 11 of the one battery pack 100 and the bottom wall 12 of the other battery pack 100, thereby improving the sealing between the stacked battery packs 100. Optionally, the first seal 30 includes a sealing ring. Optionally, the cross-section of the first seal 30 is circular.

[0062] Please refer to Figures 6 to 9. In some embodiments, the outer periphery of the first guide member 20 is provided with a first recess 21, and a part of the first seal member 30 is provided in the first recess 21, which facilitates the installation and positioning of the first seal member 30 and reduces the possibility that the first seal member 30 may shift and detach from the first guide member 20 during assembly and use.

[0063] In some embodiments, the first recess 21 is formed by a portion of the outer periphery of the first guide member 20 recessed in the axial direction of the first guide member 20.

[0064] In some embodiments, the first seal 30 is interference-fitted with the first guide 20, so that the first seal 30 is taut on the outer peripheral surface of the first guide 20, further reducing the possibility of displacement of the first seal 30 and detachment from the first guide 20.

[0065] In some embodiments, the first guide member 20 includes a first end 20a, which is connected to the top wall 11.

[0066] Optionally, the surface of the first end 20a is provided with threads, the top wall 11 is provided with a top wall opening 111, the top wall opening 111 is provided with threads, the first end 20a is provided at the top wall opening 111, and the first end 20a is fixedly connected to the top wall 11 by a threaded connection.

[0067] Optionally, the surface of the first end 20a is provided with threads, the top wall 11 is provided with a top wall opening 111, and the battery pack 100 includes a fixing member (not shown). A portion of the fixing member is located in the top wall opening 111, and a portion of the fixing member protrudes from the inner surface of the top wall 11. The first end 20a is threadedly connected to the fixing member. By providing the fixing member, the connection area between the first end 20a and the fixing member can be increased, thereby increasing the connection strength between the first end 20a and the top wall 11, and it is also beneficial to reduce the thickness of the top wall 11 and increase the accommodating space inside the outer casing 10.

[0068] In some embodiments, the first guide member 20 includes a second end 20b. The first end 20a and the second end 20b are disposed at both ends of the first guide member 20 along a first direction X. The second end 20b protrudes from the top wall 11. In some embodiments, the second end 20b is provided with an opening 201, and an external workpiece (e.g., a screwdriver) can be connected to the opening 201 to facilitate rotation of the first guide member 20 and to aid in assembly.

[0069] Please refer to Figures 3, 6 to 9. In some embodiments, the first opening 121 is arranged from large to small along the first direction X. When two battery packs 100 are stacked along the first direction X, the first seal 30 connects to the inner surface of the first opening 121, which helps to improve the sealing between the stacked battery packs 100.

[0070] In some embodiments, the inner surface of the first opening 121 is provided as a conical surface 121a. When two battery packs 100 are stacked along the first direction X, the conical surface 121a connects to the first sealing member 30 to achieve a sealing effect. The conical surface 121a can provide a compression deformation space for the first sealing member 30. The conical surface 121a compresses the first sealing member 30, causing the first sealing member 30 to deform along the conical surface 121a, thereby increasing the sealing area, which is beneficial to improving the sealing performance between the stacked battery packs 100. In addition, the conical surface 121a can provide guidance for the first guide member 20, making it easier to place the first guide member 20 in the first opening 121, which is beneficial to improving the ease of assembly.

[0071] Referring to Figure 8, in some embodiments, a cross-section along the first direction X, passing through the center of the first opening 121 and the center of the first seal 30, includes two first cross-sections 121b and two second cross-sections 20c, each second cross-section 20c located within a first cross-section 121b. The first cross-section 121b is the cross-section formed by the conical surface 121a, the top wall 11, and the first guide member 20 in any cross-section, and this cross-section is approximately an equilateral triangle structure. The second cross-section 20c is the cross-section of the first seal 30. The area of ​​the second cross-section 20c is 80%-90% of the area of ​​the first cross-section 121b, providing compression deformation space for the first seal 30, thereby increasing the sealing area and improving the sealing performance between stacked battery packs 100. If the area of ​​the second cross-section 20c is less than 80% of the area of ​​the first cross-section 121b, although the deformation space increases, the pressure exerted by the conical surface 121a on the first seal 30 decreases. This results in a decrease in the pressure exerted by the first seal 30 on the conical surface 121a, the top wall 11, and the first guide 20, thus affecting the sealing performance. If the area of ​​the second cross-section 20c is greater than 90% of the area of ​​the first cross-section 121b, the deformation space of the first seal 30 decreases, leading to a reduction in the sealing area and affecting the sealing performance. Optionally, the area of ​​the second cross-section 20c can be any one or any combination of two of the following: 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, and 90% of the area of ​​the first cross-section 121b.

[0072] Please refer to Figures 1, 2, 7 and 8. In some embodiments, the battery pack 100 includes a second seal 60, which is connected to the top wall 11 and surrounds the outer periphery of the first connector 40.

[0073] In some embodiments, when two battery packs 100 are stacked along a first direction X, a second seal 60 seals the top wall 11 of one battery pack 100 and the bottom wall 12 of the other battery pack 100. By sealing the top wall 11 of one battery pack 100 and the bottom wall 12 of the other battery pack 100 with the second seal 60, the second seal 60 seals the mating position of the first connector 40 and the second connector 50, further improving the sealing performance of the stacked battery packs 100.

[0074] In some embodiments, the second seal 60 is configured as a rectangular structure, which helps to increase the contact area between the second seal 60 and the top wall 11 and the bottom wall 12. In other embodiments, the second seal 60 may also be configured as a circular, elliptical, triangular, or irregular shape.

[0075] In some embodiments, along the first direction X, the first connector 40 protrudes from the second seal 60, and the first connector 40 may contact other structures before the second seal 60, reducing the possibility of damage to the second seal 60 during transportation and assembly.

[0076] In some embodiments, along the second direction Y, the distance between the second seal 60 and the first guide 20 is less than the distance H between the first connector 40 and the first guide 20. A portion of the second seal 60 is located between the first guide 20 and the first connector 40. When stacking the battery pack 100, the first guide 20 contacts the bottom wall 12 first, reducing the risk of the second seal 60 being damaged by impact during stacking. The first guide 20 thus protects the second seal 60.

[0077] In some embodiments, the top wall 11 is provided with a second recess 112, and a portion of the second seal 60 is disposed in the second recess 112, with the portion of the second seal 60 extending beyond the top wall 11 along a first direction X. By disposing a portion of the second seal 60 in the second recess 112, the space occupied by the second seal 60 can be reduced. The second recess 112 can position the second seal 60, resulting in higher positioning accuracy and making it less prone to falling off.

[0078] In some embodiments, along the first direction X, the second seal 60 extends beyond the top wall 11 by at least 2.5 mm, thereby satisfying the gap and sealing requirements between the stacked battery packs 100.

[0079] In some embodiments, the second seal 60 is configured to be formed by curing a sealing material within the second recess 112, thereby fixing the second seal 60 within the second recess 112 and further reducing the probability that the second seal 60 may easily detach.

[0080] In some embodiments, the compression ratio A of the second seal 60 satisfies 40% ≤ A ≤ 60%, further satisfying the gap and sealing requirements between the stacked battery packs 100. A can be a range of any one or any two of 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, and 60%.

[0081] In some embodiments, along the first direction X, the first seal 30 extends beyond the second seal 60. When two battery packs 100 are stacked, the first seal 30 protects the second seal 60, reducing the risk of damage to the second seal 60 that could affect the sealing performance.

[0082] In some embodiments, the hardness of the first seal 30 is greater than the hardness of the second seal 60, thereby further protecting the second seal 60.

[0083] In some embodiments, the Shore A hardness of the first seal 30 is in the range of 60HA-80HA.

[0084] Optionally, the Shore A hardness of the first seal 30 can be any one or any combination of two of the following: 60HA, 61HA, 62HA, 63HA, 64HA, 65HA, 66HA, 67HA, 68HA, 69HA, 70HA, 71HA, 72HA, 73HA, 74HA, 75HA, 76HA, 77HA, 78HA, 79HA, and 80HA.

[0085] In some embodiments, the Shore A hardness of the second seal 60 ranges from 8HA to 30HA.

[0086] Optionally, the Shore A hardness of the second seal 60 can be any one or any combination of two of the following: 8HA, 9HA, 10HA, 11HA, 12HA, 13HA, 14HA, 15HA, 16HA, 17HA, 18HA, 19HA, 20HA, 21HA, 22HA, 23HA, 24HA, 25HA, 26HA, 27HA, 28HA, 29HA, and 30HA.

[0087] In some embodiments, the first seal 30 comprises EPDM rubber, and the second seal 60 comprises foamed silicone.

[0088] Please refer to Figures 3, 5 to 8. This application also provides a battery module 200, which includes two battery packs 100 stacked on top of each other as described above. A first guide 20 of one battery pack 100 is inserted into a first opening 121 of the other battery pack 100, and a first connector 40 of the one battery pack 100 is inserted into a second connector 50 of the other battery pack 100.

[0089] In some embodiments, a first seal 30 of one battery pack 100 is connected to the inner surface of a first opening 121 of another battery pack. A first guide 20 is disposed at the first opening 121 to guide and connect the stacked battery packs 100, and the first seal 30 seals the connection between the top wall 11 of one battery pack 100 and the bottom wall 12 of the other battery pack 100, thereby sealing the first opening 121 and improving the airtightness of the battery module 200.

[0090] In some embodiments, a second seal 60 of one battery pack 100 seals the connection between the top wall 11 and the bottom wall 12 of the other battery pack 100. By sealing the connection between the top wall 11 and the bottom wall 12 of the other battery pack 100 with the second seal 60, and by sealing the mating position of the first connector 40 and the second connector 50, the sealing performance of the battery module 200 is further improved.

[0091] Referring to Figure 10, this application also provides an electrical device 300 employing the aforementioned battery pack 100 or battery module 200. In some embodiments, the electrical device 300 of this application may be, but is not limited to, electronic devices, drones, backup power supplies, electric vehicles, electric motorcycles, electric-assisted bicycles, power tools, large household battery modules, etc.

[0092] Those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the spirit and essence of this application fall within the scope of this application's disclosure.

Claims

1. A battery pack, characterized in that, include: The outer casing includes a bottom wall and a top wall arranged along a first direction; A first guide member is provided on the top wall; The first opening is located in the bottom wall; A first connector is located on the top wall; A second connector is located on the bottom wall; The first guide and the first opening are configured such that two battery packs are stacked along the first direction, the first guide of one battery pack is inserted into the first opening of the other battery pack, and the first connector of the one battery pack is connected to the second connector of the other battery pack.

2. The battery pack as described in claim 1, characterized in that, Along the first direction, the first guide extends beyond the first connector.

3. The battery pack as described in claim 1 or 2, characterized in that, It includes a first seal that is connected to the top wall and surrounds the outer periphery of the first guide.

4. The battery pack as described in claim 3, characterized in that, It includes a second seal that connects to the top wall and surrounds the outer periphery of the first connector.

5. The battery pack as described in claim 4, characterized in that, Along the first direction, the first seal extends beyond the second seal.

6. The battery pack as described in claim 4, characterized in that, The hardness of the first seal is greater than that of the second seal.

7. The battery pack as described in claim 4, characterized in that, The first seal comprises EPDM rubber, and the second seal comprises foamed silicone.

8. The battery pack according to any one of claims 3 to 7, characterized in that, The outer periphery of the first guide member is provided with a first recess, and a portion of the first seal member is disposed in the first recess.

9. The battery pack according to any one of claims 3 to 8, characterized in that, Along the first direction, the first opening is set from large to small, and the first opening is configured such that two battery packs are stacked along the first direction, and the first seal is connected to the inner surface of the first opening.

10. The battery pack according to any one of claims 4 to 7, characterized in that, The top wall is provided with a second recess, and a portion of the second seal is disposed in the second recess.

11. The battery pack according to any one of claims 1 to 10, characterized in that, The bottom wall is provided with a receiving recess, which is configured such that two battery packs are stacked along the first direction, and the top wall of one battery pack is located in the receiving recess of the other battery pack.

12. The battery pack as claimed in claim 11, characterized in that, The bottom surface of the receiving recess is provided with a receiving cavity, and the second connector is disposed in the receiving cavity. In a direction opposite to the first direction, the second connector does not protrude from the receiving cavity.

13. The battery pack according to any one of claims 1 to 12, characterized in that, The number of the first guide members is at least two. When viewed along a third direction, the at least two first guide members are arranged along a second direction. Along the second direction, the projections of the at least two first guide members are separate, and the first direction, the second direction, and the third direction are perpendicular to each other.

14. A battery module, characterized in that, The battery pack includes two battery packs as described in any one of claims 1 to 13, the two battery packs are stacked along the first direction, the first guide of one battery pack is inserted into the first opening of the other battery pack, and the first connector of the one battery pack is connected to the second connector of the other battery pack.

15. An electrical appliance, characterized in that, This includes the battery pack as described in any one of claims 1 to 13 or the battery module as described in claim 14.

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