A battery pack and an electric device

Abstract

The application discloses a battery pack and a power utilization device, and the battery pack comprises a battery cell group, a first shell, a second shell, a cover and a first sealing element; the first shell and the cover are combined along a first direction to form a containing cavity containing the battery cell group, a first end surface of the cover and a second end surface of the first shell jointly form an annular sealing surface, the second shell covers the cavity opening and covers the sealing surface, and the first sealing element is arranged on the sealing surface and abuts against the sealing surface and the second shell. By combining the cover and the first shell along the first direction to form the containing cavity, the battery cell group can be conveniently placed in the containing cavity, and the assembly of the battery cell group is facilitated; meanwhile, the first sealing element is arranged on the sealing surface, the second shell covers the cavity opening of the containing cavity along a second direction and covers the sealing surface, and the assembly gap between the second shell and the cover and the first shell is sealed by the first sealing element, so that the sealing of the battery pack can be realized, and the sealing structure of the battery pack is simplified.

Description

Technical Field

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

[0002] With the booming development of the new energy industry, new energy vehicles are gradually entering the public eye. Battery packs are used to power new energy vehicles, making their reliability and quality crucial. The structure of a battery pack includes the battery pack casing, cover, and battery cells. During the assembly of these components, there will be assembly gaps, which often require the installation of seals at these gaps to improve the sealing performance of the battery pack.

[0003] However, the battery pack sealing structure design in related technologies is complex and the assembly is cumbersome, which will significantly affect the production efficiency of the battery pack. Utility Model Content

[0004] This application aims to provide a battery pack and electrical device that can solve the problems of complex battery pack sealing structure design and cumbersome assembly in related technologies.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application propose a battery pack, comprising: a battery cell assembly, a first housing, a second housing, a cover, and a first sealing element;

[0007] The battery pack has a first direction and a second direction that are perpendicular to each other. The first shell and the cover are enclosed along the first direction to form a receiving cavity, and the battery cell assembly is disposed in the receiving cavity.

[0008] The receiving cavity has an opening on one side along the second direction. The cover has a first end face on the side facing the opening, and the first housing has a second end face on the side facing the opening. The first end face and the second end face together form an annular sealing surface. The second housing seals the opening and covers the sealing surface. The first sealing member is disposed on the sealing surface. One side of the first sealing member abuts against the sealing surface, and the other side of the first sealing member abuts against the second housing. The first sealing member is used to seal the gap between the second housing and the cover and the first housing.

[0009] Optionally, the first housing includes a first main body and a connecting portion circumferentially disposed around the first main body. The first main body has a groove, and the first main body is connected to the cover along the first direction so that the groove and the cover cooperate to form the receiving cavity. The connecting portion has a second end face on the side facing the cavity opening along the second direction.

[0010] Optionally, the battery pack further includes fasteners, and the second end face is also provided with a connecting surface surrounding the outer periphery of the sealing surface. The connecting surface is provided with a plurality of first connecting holes, which are arranged at intervals along the circumference of the connecting surface. The second housing is provided with a plurality of second connecting holes, which are arranged at intervals along the circumference of the second housing. Each first connecting hole corresponds to a second connecting hole. The fastener passes through the second connecting hole and the first connecting hole, and the connecting part is connected to the second housing through the fastener.

[0011] Optionally, the cover includes a second main body and a mounting part; the second main body and the first main body surround the receiving cavity along the first direction to form the receiving cavity, the mounting part is disposed on the side of the second main body facing the receiving cavity, the end face of the second main body and the first main body along the first direction is fitted together, the mounting part extends into the groove, and the side of the mounting part facing the cavity opening is provided with the first end face.

[0012] Optionally, the battery pack further includes a second seal, which is disposed between the mounting portion and the first main body portion, for sealing the gap between the cover and the first housing.

[0013] Optionally, the battery pack further includes a potting compound; the groove includes a first receiving groove and a second receiving groove that are interconnected, the first receiving groove being located on the side of the second receiving groove near the cover, the battery cell assembly being disposed in the second receiving groove, and the potting compound being filled in the first receiving groove; the mounting portion is at least partially embedded in the potting compound to be connected to the first housing and the second housing respectively through the potting compound.

[0014] Optionally, along the second direction, the depth of the first receiving groove is greater than the depth of the second receiving groove.

[0015] Optionally, the battery pack further includes a connector, and the battery pack also has a third direction that is perpendicular to the first direction and the second direction respectively;

[0016] The connecting member is provided on the side of the second housing opposite to the first housing along the second direction;

[0017] And / or, the first housing is provided with the connector on at least one side along the third direction.

[0018] Optionally, the connector includes a fixing part and a folding part. The fixing part is connected to the second housing or the first housing, and the folding part is connected to the fixing part. The folding part is bent and disposed with respect to the fixing part. The folding part is provided with a mounting hole for connecting electrical equipment.

[0019] Secondly, embodiments of this application provide an electrical device including the battery pack described in any of the above claims.

[0020] In the embodiments of this application, by fastening the cover and the first housing along the first direction to form a receiving cavity for accommodating the battery cell assembly, it is convenient to place the battery cell assembly from the cavity opening along the second direction Y into the receiving cavity, thereby facilitating the assembly of the battery cell assembly. At the same time, a first sealing element is provided on the annular sealing surface formed by the first end face of the cover and the second end face of the first housing, and the second housing is sealed at the cavity opening along the second direction and covers the sealing surface, so that the first sealing element can seal the assembly gap between the second housing and the cover and the first housing. This not only satisfies the sealing effect of the battery pack, but also simplifies the sealing structure of the battery pack, and facilitates the assembly of the battery pack, thereby improving the production efficiency of the battery pack.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of this application;

[0024] Figure 2 This is an exploded view of a battery pack according to an embodiment of this application;

[0025] Figure 3 This is a partial structural schematic diagram of a battery pack according to an embodiment of this application;

[0026] Figure 4 This is a cross-sectional view of a battery pack according to an embodiment of this application;

[0027] Figure 5 yes Figure 4 An enlarged view of part A, shown in the center circle;

[0028] Figure 6 This is a schematic diagram of the structure of the first housing of the battery pack according to an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of the second housing of the battery pack according to an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the structure of the cover of the battery pack according to an embodiment of this application;

[0031] Figure 9 This is a structural schematic diagram of the connector of the battery pack according to an embodiment of this application.

[0032] Figure label:

[0033] 10: Battery cell assembly; 20: First housing; 21: First main body; 211: Groove; 2111: First receiving groove; 2112: Second receiving groove; 22: Connecting part; 221: Second end face; 222: First connecting hole; 223: Sealing surface; 23: Receiving cavity; 231: Cavity opening; 30: Second housing; 321: Second connecting hole; 40: Cover; 41: Second main body; 42: Mounting part; 421: First end face; 50: First seal; 60: Second seal; 70: Fastener; 80: Connector; 81: Fixing part; 82: Folding part; 821: Mounting hole; 90: Encapsulating colloid; X: First direction; Y: Second direction; Z: Third direction. Detailed Implementation

[0034] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0036] 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.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] The battery pack and electrical equipment provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0039] In related technologies, a battery pack consists of a casing, battery cells, and a cover. The casing has a receiving cavity. During assembly, the battery cells are first inserted into the cavity through the opening, and then the cover is placed over the opening. A sealing structure is installed at the assembly gap between the cover and the casing to seal the opening. However, because a fixing connection structure is also required between the cover and the casing, and the mating area between them is small, the sealing structure becomes quite complex to meet the sealing requirements. This makes battery pack processing and assembly inconvenient, thus affecting production efficiency.

[0040] Therefore, embodiments of this application provide a battery pack and electrical equipment that not only facilitates the assembly of battery cells but also simplifies the sealing structure of the battery pack, thereby improving the production efficiency of the battery pack.

[0041] like Figures 1 to 3 As shown, a battery pack according to some embodiments of this application includes: a cell assembly 10, a first housing 20, a second housing 30, a cover 40, and a first sealing member 50; the battery pack has a first direction X and a second direction Y that are perpendicular to each other, the first housing 20 and the cover 40 enclose a receiving cavity 23 along the first direction X, and the cell assembly 10 is disposed in the receiving cavity 23; the receiving cavity 23 has an opening 231 on one side along the second direction Y, and the cover 40 has a first end face 421 on the side facing the opening 231, the first housing 20... The side facing the cavity 231 has a second end face 221. The first end face 421 and the second end face 221 together form an annular sealing surface 223. The second housing 30 is sealed at the cavity 231 and covers the sealing surface 223. The first sealing member 50 is provided on the sealing surface 223. One side of the first sealing member 50 abuts against the sealing surface 223, and the other side of the first sealing member 50 abuts against the second housing 30. The first sealing member 50 is used to seal the gap between the second housing 30 and the cover 40 and the first housing 20.

[0042] In the embodiments of this application, by fastening the cover 40 and the first housing 20 along the first direction X to form a receiving cavity 23 for accommodating the battery cell assembly 10, it is convenient to place the battery cell assembly 10 into the receiving cavity 23 from the cavity opening 231 along the second direction Y, thereby facilitating the assembly of the battery cell assembly 10. At the same time, a first sealing element 50 is provided on the annular sealing surface 223 formed by the first end face 421 of the cover 40 and the second end face 221 of the first housing 20, and the second housing 30 is sealed at the cavity opening 231 of the receiving cavity 23 along the second direction Y and covers the sealing surface 223, so that the assembly gap between the second housing 30 and the cover 40 and the first housing 20 is sealed by the first sealing element 50. This not only satisfies the sealing effect of the battery pack, but also simplifies the sealing structure of the battery pack, and facilitates the assembly of the battery pack, thereby improving the production efficiency of the battery pack.

[0043] In some embodiments, the first sealing element 50 can be a sealant. The sealant is applied to the sealing surface 223. The sealant can not only bond and fix the first housing 20 and the second housing 30, but also effectively seal the gap between the first housing 20 and the second housing 30 to prevent external moisture, dust and other impurities from entering the battery pack and affecting the reliability and safety of the battery pack operation.

[0044] The sealant can be epoxy resin, silicone, or polyurethane, etc. The specific type of sealant can be flexibly selected according to actual needs, and the embodiments of this application do not limit it.

[0045] In other embodiments, the first sealing element 50 may also be a sealing foam. Adhesive layers are provided on both sides of the sealing foam, and the sealing foam is connected and fixed to the first housing 20 and the second housing 30 by the adhesive layers. At the same time, the interlocking action of the first housing 20 and the second housing 30 along the second direction Y is used to compress the sealing foam, thereby achieving the sealing effect of the sealing foam.

[0046] In some embodiments, such as Figure 2 and Figure 6 As shown, the first housing 20 includes a first main body 21 and a connecting part 22 arranged circumferentially around the first main body 21. The first main body 21 has a groove 211. The first main body 21 is connected to the cover 40 along the first direction X so that the groove 211 and the cover 40 cooperate to form a receiving cavity 23. The connecting part 22 has a second end face 221 on the side facing the cavity opening 231 along the second direction Y.

[0047] In this embodiment, the groove 211 in the first main body 21 and the cover 40 are fitted together along the first direction X to form a receiving cavity 23 for accommodating the battery cell assembly 10. At the same time, a connecting portion 22 is provided around a portion of the first main body 21, and a second end face 221 is provided on the connecting portion 22. This gives the connecting portion of the first housing 20 a larger space for setting a sealing surface, thereby increasing the connection area between the second housing 30 and the first housing 20, and thus improving the overall sealing performance and connection reliability of the battery pack. In addition, by providing the connecting portion 22 around a portion of the first main body 21, the shape of the battery pack can be made more regular, which facilitates the installation and use of the battery pack.

[0048] In some embodiments, such as Figure 2 and Figure 7 As shown, the battery pack also includes a fastener 70. The second end face 221 is also provided with a connecting surface surrounding the outer periphery of the sealing surface 223. The connecting surface is provided with a plurality of first connecting holes 222, which are arranged at intervals along the circumference of the connecting surface. The second housing 30 is provided with a plurality of second connecting holes 321, which are arranged at intervals along the circumference of the second housing 30. Each first connecting hole 222 corresponds to a second connecting hole 321. The fastener 70 passes through the second connecting hole 321 and the first connecting hole 222. The connecting part 22 is connected to the second housing 30 through the fastener 70.

[0049] In this embodiment, a connecting surface is provided around the outer periphery of the sealing surface 223, and a plurality of first connecting holes 222 are provided circumferentially around the connecting surface. A plurality of second connecting holes 321 are provided circumferentially around the second housing 30. Fasteners 70 pass through the second connecting holes 321 and the first connecting holes 222. The connecting part 22 is connected to the second housing 30 through the fasteners 70. This can further improve the stability and reliability of the connection between the second housing 30 and the first housing 20. At the same time, by setting the first connecting holes 222 on the connecting surface around the outer periphery of the sealing surface 223, the fasteners 70 can connect the second housing 30 and the first housing 20 without damaging the sealing surface 223, thereby ensuring the sealing performance of the battery pack.

[0050] In addition, when the first seal 50 is a sealant, the connecting surface can also serve as an overflow space to accommodate the sealant overflowing from the sealing surface 223, thereby preventing excess sealant from overflowing onto the battery pack surface and affecting the aesthetics of the battery pack.

[0051] It should be noted that the fastener 70 can be a bolt, screw, etc. The tightening operation can firmly connect the second housing 30 to the first housing 20, ensuring the structural stability and sealing performance of the battery pack. The specific type of fastener 70 can be flexibly selected according to actual needs, and this application embodiment does not limit it.

[0052] It should also be noted that the number and distribution of fasteners 70 can be flexibly set according to actual needs to meet the strength and sealing requirements of the battery pack in different application scenarios.

[0053] In some embodiments, such as Figure 8 As shown, the cover 40 includes a second main body 41 and a mounting part 42; the second main body 41 and the first main body 21 surround each other along the first direction X to form a receiving cavity 23, the mounting part 42 is provided on the side of the second main body 41 facing the receiving cavity 23, the end faces of the second main body 41 and the first main body 21 are attached to each other along the first direction X, the mounting part 42 extends into the groove 211, and the side of the mounting part 42 facing the cavity opening 231 is provided with a first end face 421.

[0054] In this embodiment, by providing a second main body portion 41 and a mounting portion 42 in the cover 40, the second main body portion 41 and the first main body portion 21 are used to form a receiving cavity 23 for accommodating the battery cell assembly 10 along the first direction X. At the same time, the mounting portion 42 is provided on the side of the second main body portion 41 facing the receiving cavity 23 and extends into the groove 211. In this way, the mounting portion 42 can be connected to the first main body portion 21 of the first housing 20, which not only improves the stability of the connection between the cover 40 and the first housing 20, but also, by providing a first end face 421 on the mounting portion 42 to provide a sealing structure, the connection structure between the cover 40 and the first housing 20 is more compact, which is beneficial to reducing the volume of the battery pack.

[0055] It should be noted that the shape and size of the mounting part 42 can be adapted to the shape and size of the groove 211 to ensure that the mounting part 42 can smoothly extend into the groove 211 and connect with the first main body part 21.

[0056] In some embodiments, such as Figure 2 As shown, the battery pack also includes a second seal 60, which is disposed between the mounting portion 42 and the first main body portion 21, and is used to seal the gap between the cover 40 and the first housing 20.

[0057] In this embodiment of the application, by providing a second sealing member 60 between the mounting part 42 and the first main body part 21, the gap between the cover 40 and the first housing 20 can be sealed by the second sealing member 60. This can further improve the sealing performance of the battery pack and prevent external moisture, dust and other impurities from entering the battery pack and damaging the cell assembly 10.

[0058] It is understandable that the second seal 60 is provided on the other end faces of the mounting portion 42 besides the first end face 421, that is, the second seal 60 is U-shaped.

[0059] It should be noted that the second sealing element 60 can be an elastic sealing ring, a rubber gasket, or foam, etc. These materials have good elasticity and sealing performance, which can effectively seal the gap between the cover 40 and the first housing 20, preventing external moisture, dust and other impurities from entering the battery pack.

[0060] In some embodiments, such as Figures 4-6 As shown, the battery pack also includes a potting compound 90; the groove 211 includes a first receiving groove 2111 and a second receiving groove 2112 that are interconnected, the first receiving groove 2111 is located on the side of the second receiving groove 2112 near the cover 40, the battery cell assembly 10 is disposed in the second receiving groove 2112, and the potting compound 90 is filled in the first receiving groove 2111; the mounting part 42 is at least partially embedded in the potting compound 90 so as to be connected to the first housing 20 and the second housing 30 respectively through the potting compound 90.

[0061] In this embodiment, by filling the first receiving groove 2111 with potting compound 90, the mounting part 42 is bonded and fixed to the first housing 20 and the second housing 30 respectively using the potting compound 90. This can improve the connection strength between the mounting part 42 and the first housing 20 and the second housing 30. In addition, by setting the first receiving groove 2111 and the second receiving groove 2112 that are interconnected, the potting compound 90 is placed in the first receiving groove 2111 and the battery cell assembly 10 is placed in the second receiving groove 2112. This avoids the potting compound 90 covering the surface of the battery cell assembly 10. This not only avoids the potting compound 90 affecting the heat dissipation of the battery cell assembly 10, but also limits the gas expansion of the battery cell assembly 10 during operation, which could lead to damage to the internal structure of the battery cell assembly 10.

[0062] Understandably, the battery pack includes a Battery Management System (BMS). The BMS is located on the side of the cover 40 away from the first housing 20 and the second housing 30. The cell assembly 10 has tabs on the side facing the cover 40. The tabs are electrically connected to the circuit board in the BMS. The tabs are embedded in the potting compound 90. The potting compound 90 can also fix the position of the tabs, thereby improving the reliability of the battery pack operation.

[0063] It should be noted that the potting compound 90 can be made of materials such as epoxy resin, silicone, or polyurethane, which have good insulation, heat resistance, and sealing performance. The specific type of potting compound 90 can be flexibly selected according to actual needs, as long as it meets the requirements of the battery pack for potting materials. This application embodiment does not limit it.

[0064] In some embodiments, along the second direction Y, the depth of the first receiving groove 2111 is greater than the depth of the second receiving groove 2112.

[0065] In this embodiment, by making the depth of the first receiving groove 2111 along the second direction Y greater than the depth of the second receiving groove 2112 along the second direction Y, sufficient filling space can be provided for the potting compound 90, so that the potting compound 90 has sufficient filling amount in the first receiving groove 2111, thereby ensuring that the potting compound 90 can effectively fix the position of the tab, and improve the connection strength and sealing between the mounting part 42 and the first housing 20 and the second housing 30.

[0066] In some embodiments, such as Figure 1 As shown, the battery pack also includes a connector 80, and the battery pack also has a third direction Z that is perpendicular to the first direction X and the second direction Y respectively; the second housing 30 is provided with the connector 80 on the side opposite to the receiving cavity 23 along the second direction Y.

[0067] In this embodiment, a connector 80 is provided on the side of the second housing 30 opposite to the receiving cavity 23 along the second direction Y, so that the battery pack can be connected to the electrical equipment. This facilitates the fixing and installation of the battery pack and the electrical equipment, and improves the convenience and flexibility of using the battery pack.

[0068] In some embodiments, such as Figure 1 As shown, the first housing 20 has a connector 80 on at least one side along the third direction Z.

[0069] In this embodiment of the application, by providing a connector 80 on at least one side of the first housing 20 along the third direction Z, the battery pack can be connected to the electrical device using the connector 80. This facilitates the fixing and installation of the battery pack and the electrical device, and improves the convenience and flexibility of using the battery pack.

[0070] In some embodiments, such as Figure 1 As shown, the first housing 20 has connectors 80 on both sides along the third direction Z.

[0071] In this embodiment, by providing connectors 80 on both sides of the first housing 20 along the third direction Z, the stability and reliability of the connection between the battery pack and the electrical equipment can be further improved. When the battery pack needs to be connected to the electrical equipment, the connectors 80 on both sides of the first housing 20 along the third direction Z can be used to securely install the battery pack on the electrical equipment, preventing the battery pack from shaking or falling off during use, thereby improving the safety and reliability of the battery pack.

[0072] In some embodiments, such as Figure 1 As shown, the second housing 30 is provided with a connector 80 on the side opposite to the first housing 20 along the second direction Y, and the first housing 20 is provided with a connector 80 on at least one side along the third direction Z.

[0073] In this embodiment, by providing a connector 80 on at least one side of the first housing 20 along the third direction Z, and simultaneously providing a connector 80 on the side of the second housing 30 opposite to the receiving cavity 23 along the second direction Y, it is convenient to connect the battery pack to the electrical device using the connector 80, thus facilitating the installation and use of the battery pack. When the battery pack needs to be connected to the electrical device, the connector 80 on at least one side of the first housing 20 along the third direction Z and the connector 80 on the side of the second housing 30 opposite to the receiving cavity 23 along the second direction Y can be used to securely install the battery pack on the electrical device, preventing the battery pack from shaking or falling off during use, thereby improving the safety and reliability of the battery pack.

[0074] It should be noted that the specific structure and shape of the connector 80 can be designed according to the needs of the electrical device to ensure that the battery pack can be stably and reliably connected to the electrical device.

[0075] In some embodiments, such as Figure 9 As shown, the connector 80 includes a fixing part 81 and a folding part 82. The fixing part 81 is connected to the second housing 30 or the first housing 20, and the folding part 82 is connected to the fixing part 81. The folding part 82 and the fixing part 81 are bent together. The folding part 82 is provided with a mounting hole 821 for connecting electrical equipment.

[0076] In this embodiment, by providing a fixing part 81 and a folding part 82 in the connector 80, the fixing part 81 is connected to the first housing 20, and the mounting hole 821 in the folding part 82 is used to connect to the electrical equipment. The fixing part 81 and the folding part 82 are bent, which facilitates the connection and fixation between the battery pack and the electrical equipment. At the same time, when the battery pack and the electrical equipment are subjected to vibration or impact, the bending arrangement between the folding part 82 and the fixing part 81 can absorb and alleviate the stress caused by vibration or impact, thereby improving the stability and reliability of the connection between the battery pack and the electrical equipment.

[0077] Optionally, embodiments of this application also propose an electrical device including the battery pack described in the above embodiments.

[0078] In the embodiments of this application, by fastening the cover 40 and the first housing 20 along the first direction X to form a receiving cavity 23 for accommodating the battery cell assembly 10, it is convenient to place the battery cell assembly 10 into the receiving cavity 23 from the cavity opening 231 along the second direction Y, thereby facilitating the assembly of the battery cell assembly 10. At the same time, a first sealing element 50 is provided on the annular sealing surface 223 formed by the first end face 421 of the cover 40 and the second end face 221 of the first housing 20, and the second housing 30 is sealed at the cavity opening 231 of the receiving cavity 23 along the second direction Y and covers the sealing surface 223, so that the assembly gap between the second housing 30 and the cover 40 and the first housing 20 is sealed by the first sealing element 50. This not only satisfies the sealing effect of the battery pack, but also simplifies the sealing structure of the battery pack, and facilitates the assembly of the battery pack, thereby improving the production efficiency of the battery pack.

[0079] In some embodiments, electrical devices may include laptops, pen-based computers, mobile computers, e-book players, portable telephones, portable fax machines, portable copiers, portable printers, stereo headphones, video recorders, LCD TVs, portable cleaners, portable CD players, mini CDs, transceivers, electronic notebooks, calculators, memory cards, portable recorders, radios, backup power supplies, motors, automobiles, motorcycles, electric bicycles, bicycles, ships, spacecraft, lighting fixtures, toys, game consoles, clocks, power tools, flashlights, cameras, large household batteries, and lithium-ion capacitors, etc.

[0080] Specifically, the vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. In this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: The battery cell assembly (10), the first housing (20), the second housing (30), the cover (40), and the first seal (50); The battery pack has a first direction (X) and a second direction (Y) that are perpendicular to each other. The first shell (20) and the cover (40) enclose a cavity (23) along the first direction (X). The battery cell assembly (10) is disposed in the cavity (23). The receiving cavity (23) has an opening (231) on one side along the second direction (Y). The cover (40) has a first end face (421) on the side facing the opening (231). The first housing (20) has a second end face (221) on the side facing the opening (231). The first end face (421) and the second end face (221) together form an annular sealing surface (223). The second housing (30) covers the opening (231) and the sealing surface (223). The first sealing member (50) is disposed on the sealing surface (223). One side of the first sealing member (50) abuts against the sealing surface (223), and the other side of the first sealing member (50) abuts against the second housing (30). The first sealing member (50) is used to seal the gap between the second housing (30) and the cover (40) and the first housing (20).

2. The battery pack according to claim 1, characterized in that, The first housing (20) includes a first main body (21) and a connecting part (22) arranged circumferentially around the first main body (21). The first main body (21) has a groove (211). The first main body (21) is connected to the cover (40) along the first direction (X) so that the groove (211) and the cover (40) cooperate to form the receiving cavity (23). The connecting part (22) has a second end face (221) on the side facing the cavity opening (231) along the second direction (Y).

3. The battery pack according to claim 2, characterized in that, The battery pack also includes fasteners (70), and the second end face (221) is also provided with a connecting surface surrounding the outer periphery of the sealing surface (223). The connecting surface is provided with a plurality of first connecting holes (222), and the plurality of first connecting holes (222) are arranged at intervals along the circumference of the connecting surface. The second housing (30) is provided with a plurality of second connecting holes (321), and the plurality of second connecting holes (321) are arranged at intervals along the circumference of the second housing (30). Each first connecting hole (222) corresponds to a second connecting hole (321). The fasteners (70) pass through the second connecting holes (321) and the first connecting holes (222). The connecting part (22) is connected to the second housing (30) through the fasteners (70).

4. The battery pack according to claim 2, characterized in that, The cover (40) includes a second main body (41) and a mounting part (42); the second main body (41) and the first main body (21) surround the receiving cavity (23) along the first direction (X), the mounting part (42) is provided on the side of the second main body (41) facing the receiving cavity (23), the end face of the second main body (41) and the first main body (21) are attached to each other along the first direction (X), the mounting part (42) extends into the groove (211), and the side of the mounting part (42) facing the cavity opening (231) is provided with the first end face (421).

5. The battery pack according to claim 4, characterized in that, The battery pack also includes a second seal (60), which is disposed between the mounting portion (42) and the first main body portion (21) to seal the gap between the cover (40) and the first housing (20).

6. The battery pack according to claim 4, characterized in that, The battery pack also includes a potting compound (90); the groove (211) includes a first receiving groove (2111) and a second receiving groove (2112) that are interconnected, the first receiving groove (2111) is located on the side of the second receiving groove (2112) near the cover (40), the battery cell assembly (10) is disposed in the second receiving groove (2112), and the potting compound (90) fills the first receiving groove (2111); the mounting part (42) is at least partially embedded in the potting compound (90) so as to be connected to the first housing (20) and the second housing (30) respectively through the potting compound (90).

7. The battery pack according to claim 6, characterized in that, Along the second direction (Y), the depth of the first receiving groove (2111) is greater than the depth of the second receiving groove (2112).

8. The battery pack according to any one of claims 1-7, characterized in that, The battery pack also includes a connector (80), and the battery pack also has a third direction (Z) that is perpendicular to the first direction (X) and the second direction (Y), respectively; The second housing (30) has the connector (80) on the side opposite to the first housing (20) along the second direction (Y); And / or, the first housing (20) is provided with the connector (80) on at least one side along the third direction (Z).

9. The battery pack according to claim 8, characterized in that, The connector (80) includes a fixing part (81) and a folding part (82). The fixing part (81) is connected to the second housing (30) or the first housing (20). The folding part (82) is connected to the fixing part (81) and is bent together with the fixing part (81). The folding part (82) has a mounting hole (821) for connecting electrical equipment.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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