Electrochemical device and electric apparatus

Abstract

The application discloses an electrochemical device and an electric device. The electrochemical device comprises a battery pack, a first shell, a second shell and a first sealing member. The first shell is provided with a containing cavity and a first opening communicating with the containing cavity, the containing cavity accommodates the battery pack, and the first shell is provided with a first protrusion. The second shell is arranged at the first opening and is provided with a second protrusion, the second protrusion is located on one side of the first protrusion along a first direction, and the second protrusion is configured to abut against the first protrusion when the second shell moves relative to the first shell along a direction opposite to the first direction. The first sealing member comprises a first elastic part, the first elastic part surrounds the first opening, is further arranged between the first shell and the second shell along a second direction perpendicular to the first direction, and is connected with the first shell. The first shell and the second shell are sealed and connected in the above manner, and the sealing performance and the assembly efficiency are improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an electrochemical device and electrical equipment. Background Art

[0002] Current battery packs and other electrochemical device enclosures typically consist of multiple parts, sealed together. In related art, these enclosure components are typically connected using bolts with sealing rings. However, this bolt-locking method requires multiple bolts, and attention must be paid to uniform tightening of bolts at different locations during the locking process, resulting in low assembly efficiency. Furthermore, the multiple screw holes hinder the sealing of the enclosure. Summary of the Invention

[0003] In view of this, it is necessary to provide an electrochemical device that is conducive to improving sealing effect and assembly efficiency.

[0004] Some embodiments of the present application provide an electrochemical device, which includes a battery pack, a first shell, a second shell, and a first seal. The first shell is provided with a accommodating cavity and a first opening connected to the accommodating cavity, the accommodating cavity accommodates the battery pack, and the first shell is provided with a first protrusion. The second shell is provided at the first opening, and the second shell is provided with a second protrusion. Along a first direction, the second protrusion is located on one side of the first protrusion. Along a direction opposite to the first direction, the second protrusion is configured to abut against the first protrusion when the second shell moves relative to the first shell. The first seal includes a first elastic portion, which is arranged around the first opening. The first elastic portion is also provided between the first shell and the second shell along a second direction perpendicular to the first direction, and the first elastic portion is connected to the first shell.

[0005] In the above embodiment, the first shell and the second shell are sealed and snap-fitted together by the first protrusion, the second protrusion and the first seal, eliminating the need for screw hole arrangement and bolt tightening, thereby improving the sealing performance and assembly efficiency of the electrochemical device.

[0006] In some embodiments, along the first direction, the second shell includes a first portion adjacent to the first opening and a second portion away from the first opening, the first elastic portion is disposed between the first shell and the first portion, and the second protrusion is disposed on the second portion.

[0007] In the above embodiment, the first elastic portion is arranged between the first shell and the first part, and the second protrusion is arranged on the second part, so that the distance between the first elastic portion and the first opening in the first direction is smaller than the distance between the second protrusion and the first opening in the first direction, which is conducive to preventing the first elastic portion and the first protrusion and the second protrusion from interfering with each other.

[0008] In some embodiments, the first sealing member further includes a first main body portion connected to the first elastic portion, the first main body portion is disposed between the first shell and the first part, and is sealed to the first part, and the first elastic portion and the first shell are against each other.

[0009] In the above embodiment, the first main body is connected to the first portion, which is conducive to limiting the movement of the first sealing member, thereby helping to reduce the risk of reduced sealing effect due to movement of the first sealing member.

[0010] In some embodiments, along the first direction, the first elastic portion includes a first wall and a second wall arranged in sequence, the first wall extends along the second direction, and the second wall extends along a direction with an angle less than 90° to the first direction. Along the first direction, the distance between the second wall and the second shell in the second direction gradually decreases.

[0011] In the above embodiment, the inclined second wall makes it easier for the first elastic portion to enter between the first and second shells when the second shell is installed in the first opening along the first direction, thereby reducing the risk of damage to the first elastic portion.

[0012] In some embodiments, the first sealing member further comprises a second elastic portion connected to the first main body portion, the second elastic portion being arranged around the first opening, and the first elastic portion and the second elastic portion being arranged in sequence along the first direction. up , the length of the second elastic portion is W dw , along the first direction, the distance between the first elastic portion and the second elastic portion is L a , satisfying L a >W up And L a >W dw .

[0013] In the above embodiment, the first elastic portion and the second elastic portion may be squeezed and deformed by the first shell after being subjected to the force of the first shell and the second shell. a >W up And L a >W dw This helps reduce the risk of the first elastic member and the second elastic member being deformed and squeezed against each other, thereby reducing the risk of the first elastic member and the second elastic member interfering with each other and deforming to cause a decrease in sealing performance.

[0014] In some embodiments, along the first direction, the second elastic portion includes a third wall and a fourth wall arranged in sequence, the third wall extends in a direction at an angle less than 90° to the first direction, and the fourth wall extends along the second direction. Along the first direction, the distance between the third wall and the second shell in the second direction gradually increases.

[0015] In the above embodiment, the distance between the third wall and the second shell in the second direction gradually increases, so that the third wall is inclined, and the overall inclination direction of the third wall is opposite to the overall inclination direction of the second wall, which is beneficial to suppressing the movement of the first seal along the first direction, and is beneficial to reducing the risk of the first seal partially or completely detaching from between the first shell and the second shell, and is beneficial to improving the sealing of the accommodating cavity.

[0016] In some embodiments, the first seal also includes a second main body portion connected to the first main body portion, the second main body portion is located on the side of the first elastic portion away from the second elastic portion, the second main body portion is connected to the second shell, and is connected to the side of the first shell in the opposite direction of the first direction.

[0017] In the above embodiment, the second main body is connected to the first shell in a direction opposite to the first direction, which is beneficial to limiting the movement of the first seal in the first direction, thereby limiting the movement of the first shell in the opposite direction to the first direction, and further beneficial to improving the stability of the connection between the first shell and the second shell.

[0018] In some embodiments, along the first direction, the distance between the second main body portion and the first elastic portion is L b , satisfying L b >W up .

[0019] In the above embodiment, the first elastic portion may be deformed toward the second main portion after being subjected to the forces of the first shell and the second shell. b >W up This helps reduce the risk of the second main body and the first elastic member being squeezed against each other, thereby reducing the risk of the second main body interfering with the deformation of the first elastic member and reducing the sealing performance.

[0020] In some embodiments, along the first direction, the first protrusion includes a fifth wall and a sixth wall arranged in sequence, the fifth wall extends in a direction at an angle less than 90° to the first direction, along the first direction, the distance between the fifth wall and the first shell in the second direction gradually increases, and the sixth wall extends along the second direction.

[0021] In the above embodiment, the fifth wall of the first protrusion is arranged at an angle, which is conducive to guiding the second protrusion, so that when the second shell is installed in the first opening along the first direction, the difficulty of the second protrusion moving over the first protrusion to the side of the first protrusion in the first direction is reduced, which is conducive to improving the convenience of installation and reducing the risk of damage caused by excessive force between the first protrusion and the second protrusion squeezing each other.

[0022] In some embodiments, along the first direction, the second protrusion includes a seventh wall and an eighth wall arranged in sequence, the seventh wall extends along the second direction, and the eighth wall extends along a direction with an angle less than 90° to the first direction. Along the first direction, the distance between the eighth wall and the second shell in the second direction gradually decreases.

[0023] In the above embodiment, the eighth wall and the fifth wall of the second protrusion are inclined in approximately the same direction, so that when the second shell is installed in the first opening along the first direction, the difficulty of the second protrusion moving over the first protrusion to the side of the first protrusion in the first direction is further reduced, which is conducive to improving the convenience of installation and reducing the risk of damage caused by excessive force between the first protrusion and the second protrusion.

[0024] In some embodiments, an adhesive material is provided between the first protrusion and the second protrusion, and the adhesive material bonds the first protrusion and the second protrusion.

[0025] In the above embodiment, the adhesive material adheres the first protrusion and the second protrusion, which is beneficial to improving the stability of the connection between the first shell and the second shell, and is beneficial to further improving the sealing performance of the accommodating cavity.

[0026] In some embodiments, the first shell is further provided with a third protrusion, which is located on one side of the first protrusion along the first direction, and the second shell is further provided with a fourth protrusion, which is located on one side of the second protrusion along the first direction, and along a direction opposite to the first direction, the fourth protrusion is configured to counteract the third protrusion when the second shell moves relative to the first shell.

[0027] In the above embodiment, the fourth protrusion abuts against the third protrusion when the second housing moves relative to the first housing, thereby further limiting the movement of the second housing relative to the first housing in a direction opposite to the first direction.

[0028] In some embodiments, along the first direction, the first shell includes a third part located between the first opening and the first protrusion, a fourth part located between the first protrusion and the third protrusion, and a fifth part located on the side of the third protrusion away from the first protrusion. Along the second direction, the thickness of the third part is W1, the thickness of the fourth part is W2, and the thickness of the fifth part is W3, satisfying W1>W2, W1>W3.

[0029] In the above embodiment, satisfying W1>W2 and W1>W3 is beneficial to increasing the length of the second protrusion along the second direction, increasing the area of ​​the connection between the second protrusion and the first protrusion, and further improving the stability of the connection between the second protrusion and the first protrusion.

[0030] In some embodiments, along the second direction, the distance between the third portion and the second shell is W4, the length of the second protrusion is W5, and the length of the fourth protrusion is W6, satisfying W4<W5, W4<W6.

[0031] In the above embodiment, satisfying the conditions W4<W5 and W4<W6 is conducive to allowing the second protrusion and the fourth protrusion to exert an interactive force with the third part during the process of the second shell being installed in the first opening along the first direction, so that the part of the second shell provided with the second protrusion and the fourth protrusion is deformed in a direction opposite to the second direction, which is conducive to the first elastic part entering between the first shell and the second shell.

[0032] In some embodiments, W2+W5≤W1+W4 is satisfied.

[0033] In the above embodiment, satisfying the condition W2+W5≤W1+W4 is beneficial to reducing the risk of the fourth portion exerting an effect on the second protrusion, causing deformation of the second shell.

[0034] In some embodiments, the second protrusion contacts the fourth portion, and the fourth protrusion contacts the fifth portion.

[0035] In the above embodiment, the second protrusion contacts the fourth part, and the fourth protrusion contacts the fifth part, which is conducive to limiting the displacement of the second shell relative to the first shell in the second direction or the direction opposite to the second direction, thereby improving the stability of the snap connection between the first shell and the second shell.

[0036] In some embodiments, adhesive material is provided on the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fourth portion, and the fifth portion.

[0037] In the above embodiment, adhesive material is provided on the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fourth part and the fifth part, which is conducive to the adhesion of the second protrusion to the first protrusion and the fourth part, and the adhesion of the fourth protrusion to the third protrusion and the fifth part, thereby facilitating the limitation of the displacement of the second shell relative to the first shell, and further improving the stability of the snap connection between the first shell and the second shell.

[0038] In some embodiments, along the first direction, the length of the fourth portion is L1, the thickness of the third protrusion is L2, the length of the fifth portion is L3, the thickness of the second protrusion is L4, the distance between the second protrusion and the fourth protrusion is L5, and the thickness of the fourth protrusion is L6, satisfying L4≤L1, L6≤L3, L2≤L5, L1+L2≤L4+L5, L4+L5+L6≤L1+L2+L3.

[0039] In the above embodiment, satisfying the conditions L4≤L1, L6≤L3, L2≤L5, L1+L2≤L4+L5, L4+L5+L6≤L1+L2+L3 is conducive to allowing the second protrusion to extend between the first protrusion and the third protrusion, and is conducive to the fourth protrusion being able to move to the side of the third protrusion away from the first protrusion, thereby reducing the risk of the first protrusion and the third protrusion interfering with the second protrusion and the fourth protrusion.

[0040] In some embodiments, the first housing further comprises a second opening communicating with the accommodating cavity, the first housing further comprises a fifth protrusion, and the electrochemical device further comprises a third housing and a second sealing member. The third housing is disposed at the second opening and is located on one side of the second housing in the first direction. The third housing further comprises a sixth protrusion, which is located on one side of the fifth protrusion in a direction opposite to the first direction. In the first direction, the sixth protrusion is configured to abut against the fifth protrusion when the third housing moves relative to the first housing. The second sealing member comprises a third elastic portion, which is disposed around the second opening, disposed between the first and third housings in the second direction, and connected to the first housing.

[0041] In the above embodiment, the first shell and the third shell are sealed and snap-fitted together by the fifth protrusion, the sixth protrusion and the second sealing member. Compared with the bolt connection method, the space occupied by the connection structure in the accommodating cavity is reduced, and the process of setting the screw holes and tightening the bolts is omitted, which is beneficial to improving the energy density, sealing and assembly efficiency of the electrochemical device.

[0042] In addition, the present application also provides an electrical device that is conducive to improving reliability.

[0043] An embodiment of the present application provides an electrical device, which includes a device body and an electrochemical device as described in any of the above embodiments, wherein the electrochemical device is installed on the device body.

[0044] In the above embodiments, the sealing effect of the electrochemical device is improved, which is beneficial to reducing the failure rate and service life of the electrochemical device, and further beneficial to improving the reliability of the electrical equipment.

[0045] The present application discloses an electrochemical device, which includes a battery pack, a first shell, a second shell, and a first seal. In a first direction, the second protrusion of the second shell is located on one side of the first protrusion of the first shell. In a direction opposite to the first direction, the second protrusion is configured to abut against the first protrusion when the second shell moves relative to the first shell. The first elastic portion of the first seal is arranged between the first shell and the second shell, and the first elastic portion is connected to the first shell. The first protrusion, the second protrusion, and the first seal realize a sealed snap-fit ​​connection between the first shell and the second shell, eliminating the process of setting screw holes and tightening bolts, thereby facilitating improved sealing and assembly efficiency of the electrochemical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic structural diagram of an electrochemical device provided in one embodiment of the present application.

[0047] Figure 2 for Figure 1 Cross-sectional view of the electrochemical device along the cutting line AA.

[0048] Figure 3 for Figure 2 A partial enlarged schematic diagram of part B in the middle.

[0049] Figure 4 for Figure 1 Schematic diagram of the structure of the first shell.

[0050] Figure 5 A partial cross-sectional view of the first shell, the second shell, and the first seal provided in one embodiment of the present application.

[0051] Figure 6 A partial cross-sectional view of the first shell and the first sealing member provided in one embodiment of the present application.

[0052] Figure 7 A partial cross-sectional view of the second shell provided in one embodiment of the present application.

[0053] Figure 8 A partial cross-sectional view of the first shell, the second shell, and the first seal provided in one embodiment of the present application.

[0054] Figure 9 A partial cross-sectional view of the first shell, the third shell, and the second seal provided in one embodiment of the present application.

[0055] Figure 10 This is an installation diagram of the first shell, the second shell, and the third shell provided in one embodiment of the present application.

[0056] Figure 11 A schematic diagram of an electrical device provided in one embodiment of the present application.

[0057] Description of main component symbols

[0058] Electrochemical device 100

[0059] Battery Pack 10

[0060] First housing 20

[0061] Accommodating chamber 21

[0062] First opening 22

[0063] First protrusion 23

[0064] Fifth Wall 231

[0065] Sixth Wall 232

[0066] The third protrusion 24

[0067] Part 325

[0068] Part 4 26

[0069] Part 5 27

[0070] Second opening 28

[0071] Fifth protrusion 29

[0072] First side wall 20a

[0073] Second side wall 20b

[0074] Third side wall 20c

[0075] Fourth side wall 20d

[0076] Second housing 30

[0077] Second protrusion 31

[0078] Seventh Wall 311

[0079] Eighth Wall 312

[0080] Part 1 32

[0081] Part 2 33

[0082] Fourth protrusion 34

[0083] First seal 40

[0084] First elastic portion 41

[0085] First Wall 411

[0086] Second wall 412

[0087] First main body portion 42

[0088] The second elastic portion 43

[0089] Third wall 431

[0090] Fourth Wall 432

[0091] Second main body portion 44

[0092] The third housing 50

[0093] Sixth protrusion 51

[0094] Second sealing member 60

[0095] The third elastic portion 61

[0096] Device body 200

[0097] Electrical equipment 1000

[0098] First direction X

[0099] Second direction Y

[0100] The third direction Z DETAILED DESCRIPTION

[0101] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0102] 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 there may be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0103] The term "perpendicular" is used to describe the ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular between the two components. For example, combined with numerical descriptions, perpendicular can refer to the angle between two straight lines being in the range of 90°±10°, perpendicular can also refer to the dihedral angle between two planes being in the range of 90°±10°, and perpendicular can also refer to the angle between a straight line and a plane being in the range of 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0104] It should be noted that when a parameter is greater than, equal to, or less than a certain endpoint value, it should be understood that the endpoint value allows a tolerance of ±10%.

[0105] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0106] The present application discloses an electrochemical device, which includes a battery pack, a first shell, a second shell, and a first seal. The first shell is provided with a accommodating cavity and a first opening connected to the accommodating cavity, the accommodating cavity accommodates the battery pack, and the first shell is provided with a first protrusion. The second shell is provided at the first opening, and the second shell is provided with a second protrusion. Along a first direction, the second protrusion is located on one side of the first protrusion. Along a direction opposite to the first direction, the second protrusion is configured to abut against the first protrusion when the second shell moves relative to the first shell. The first seal includes a first elastic portion, the first elastic portion is arranged around the first opening, and the first elastic portion is also arranged between the first shell and the second shell along a second direction perpendicular to the first direction, and the first shell and the second shell apply a force to compress and deform the first elastic portion.

[0107] The first shell and the second shell are sealed and connected by the first protrusion, the second protrusion and the first seal, eliminating the steps of setting screw holes and tightening bolts, thereby improving the sealing performance and assembly efficiency of the electrochemical device.

[0108] The following will describe some embodiments of the present application in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0109] See also Figures 1 to 3 The present invention provides an electrochemical device 100, which includes a battery pack 10, a first shell 20, a second shell 30, and a first seal 40. The first shell 20 has a housing 21 and a first opening 22 communicating with the housing 21. The housing 21 accommodates the battery pack 10. The second shell 30 is disposed in the first opening 22. The first seal 40 includes a first elastic portion 41, which is disposed around the first opening 22 and is disposed between the first shell 20 and the second shell 30.

[0110] In some embodiments, see Figure 2 The battery pack 10 includes a plurality of batteries (not shown), which may be connected in series or in parallel, without specific limitation. In some embodiments, the batteries may be soft-pack batteries, square-shell batteries, cylindrical batteries, and other types of batteries, which are not listed here.

[0111] In some embodiments, see Figure 3The first housing 20 is provided with a first protrusion 23, and the second housing 30 is provided with a second protrusion 31. Along the first direction X, the second protrusion 31 is located on one side of the first protrusion 23. Along the direction opposite to the first direction X, the second protrusion 31 is configured to abut against the first protrusion 23 when the second housing 30 moves relative to the first housing 20, thereby limiting the movement of the second housing 30 relative to the first housing 20 in the direction opposite to the first direction X. Along a second direction Y perpendicular to the first direction X, a first elastic portion 41 is provided between the first housing 20 and the second housing 30. The first elastic portion 41 is connected to the first housing 20, and at least a portion of the first elastic portion 41 is in a compressively deformed state. The first and second housings 20 and 30 exert a force that compresses and deforms the first elastic portion 41.

[0112] Understandably, see Figure 4 The first direction X is the direction in which the second housing 30 is installed in the first opening 22, and the second direction Y is the direction from the center of the first opening 22 toward the edge of the first opening 22. The second direction Y can be a direction at any angle within a plane perpendicular to the first direction X. After the second housing 30 is installed in the first opening 22, the first protrusion 23 and the second protrusion 31 abut against each other to limit the movement of the second housing 30 relative to the first housing 20 in a direction opposite to the first direction X. The first elastic portion 41 enters between the first housing 20 and the second housing 30 and is compressed and deformed by the forces acting on it, thereby achieving a sealed engagement between the first housing 20 and the second housing 30. The first housing 20 and the second housing 30 of the present application are sealedly engaged by the first protrusion 23, the second protrusion 31, and the first sealing member 40. Compared to bolting the first housing 20 and the second housing 30, this eliminates the need for screw hole installation and bolt tightening, thereby improving the sealing performance and assembly efficiency of the electrochemical device 100.

[0113] In some embodiments, see Figure 5 Along the first direction X, the second housing 30 includes a first portion 32 adjacent to the first opening 22 and a second portion 33 away from the first opening 22, and the first portion 32 is connected to the second portion 33. Figure 5 The boundary between the first portion 32 and the second portion 33 is indicated by a dotted line.

[0114] In some embodiments, see Figure 5 The first elastic portion 41 is arranged between the first shell 20 and the first part 32, and the second protrusion 31 is arranged on the second part 33, so that the distance between the first elastic portion 41 and the first opening 22 in the first direction X is smaller than the distance between the second protrusion 31 and the first opening 22 in the first direction X, which is conducive to preventing the first elastic portion 41 from interfering with the first protrusion 23 and the second protrusion 31.

[0115] In some implementations, see Figure 5 The second portion 33 and at least a portion of the first portion 32 are located in the accommodating cavity 21, and the first protrusion 23, the second protrusion 31, and at least a portion of the first elastic portion 41 are all located in the first accommodating cavity 21. The first elastic portion 41 is disposed around the first opening 22 in the accommodating cavity 21.

[0116] In some other embodiments, the first portion 32 and the second portion 33 are both located outside the accommodating cavity 21, and the first protrusion 23, the second protrusion 31, and at least a portion of the first elastic portion 41 are all located outside the first accommodating cavity 21. The first elastic portion 41 is disposed outside the accommodating cavity 21 and surrounds the first opening 22.

[0117] In some embodiments, see Figure 5 The first sealing member 40 further includes a first main portion 42 connected to the first elastic portion 41. The first main portion 42 is disposed between the first housing 20 and the first portion 32 and is sealed therewith. The first elastic portion 41 abuts against the first housing 20, compressing the first elastic portion 41 and causing it to deform. The connection between the first main portion 42 and the first portion 32 helps limit the movement of the first sealing member 40, thereby reducing the risk of movement of the first sealing member 40 and causing a reduction in sealing effectiveness.

[0118] In some embodiments, the first main body 42 and the first part 32 can be sealed by welding, gluing or pressing. The first main body 42 can be made of non-metallic materials such as rubber, silicone or plastic, or metal materials such as aluminum or copper.

[0119] In some embodiments, see Figure 6 Along the first direction X, the first elastic portion 41 includes a first wall 411 and a second wall 412 arranged in sequence. The first wall 411 and the second wall 412 can be directly connected, and other walls can also be arranged between the first wall 411 and the second wall 412. No specific limitation is made here.

[0120] It can be understood that the first wall 411 and the second wall 412 are walls set when the first elastic part 41 is manufactured. When the first elastic part 41 is subjected to the force applied by the first shell 20 and the second shell 30, the first wall 411 and the second wall 412 may be deformed.

[0121] In some embodiments, see Figure 6The first wall 411 extends along the second direction Y, and the second wall 412 extends along a direction forming an angle less than 90° with the first direction X. Along the first direction X, the distance between the second wall 412 and the second housing 30 in the second direction Y gradually decreases. The inclined second wall 412 makes it easier for the first elastic portion 41 to enter between the first housing 20 and the second housing 30 when the second housing 30 is installed in the first opening 22 along the first direction X, thereby reducing the risk of damage to the first elastic portion 41.

[0122] Among them, the second wall 412 extends in a direction with an angle less than 90° with the first direction X, which can be understood as the entire second wall 412 extends in a direction with an angle less than 90° with the first direction X. The second wall 412 can be a flat wall, a stepped wall, an arc-shaped wall, or other irregular wall.

[0123] In some embodiments, the first elastic portion 41 may be made of a material that is easily elastically deformed, such as silicone or rubber, to improve the sealing performance of the accommodating cavity 21 .

[0124] In some embodiments, see Figure 6 The first sealing member 40 further includes a second elastic portion 43 connected to the first main body portion 42. The second elastic portion 43 is disposed around the first opening 22. The first elastic portion 41 and the second elastic portion 43 are sequentially arranged along the first direction X. When the second housing 30 is installed into the first opening 22 along the first direction X, the second elastic portion 43 contacts the first housing 20 before the first elastic portion 41. The second elastic portion 43 is compressed and deformed by the forces acting on it by the first and second housings 20, 30. This further enhances the sealing performance of the accommodating chamber 21.

[0125] In some embodiments, see Figure 6 , along the second direction Y, the length of the first elastic portion 41 is W up , the length of the second elastic portion 43 is W dw , along the first direction X, the distance between the first elastic portion 41 and the second elastic portion 43 is L a , satisfying L a >W up And L a >W dw After the first elastic portion 41 and the second elastic portion 43 are subjected to the force of the first shell 20 and the second shell 30, they may be squeezed and deformed by the first shell 20. a >W up And L a >W dw This helps reduce the risk of the first elastic member and the second elastic member being deformed and squeezed against each other, thereby reducing the risk of the first elastic member and the second elastic member interfering with each other and deforming to cause a decrease in sealing performance.

[0126] In some embodiments, along the second direction Y, the length W of the first elastic portion 41 is up and the length W of the second elastic portion 43 dw It refers to the length of the first elastic portion 41 and the second elastic portion 43 along the second direction Y when they are not subjected to the force of the first shell 20 and the second shell 30 .

[0127] In some other embodiments, along the second direction Y, the length W of the first elastic portion 41 is up and the length W of the second elastic portion 43 dw It refers to the length of the first elastic portion 41 and the second elastic portion 43 along the second direction Y under the action of the first shell 20 and the second shell 30 .

[0128] In some embodiments, along the first direction X, the distance L between the first elastic portion 41 and the second elastic portion 43 is a It refers to the distance between the first elastic portion 41 and the second elastic portion 43 when they are not subjected to the force of the first shell 20 and the second shell 30 .

[0129] In some other embodiments, along the first direction X, the distance L between the first elastic portion 41 and the second elastic portion 43 is a It refers to the distance between the first elastic portion 41 and the second elastic portion 43 under the force of the first shell 20 and the second shell 30.

[0130] In some embodiments, see Figure 6 Along the first direction X, the second elastic portion 43 includes a third wall 431 and a fourth wall 432 arranged in sequence. The third wall 431 and the fourth wall 432 can be directly connected, and other walls can also be arranged between the third wall 431 and the fourth wall 432, which is not specifically limited here.

[0131] In some embodiments, see Figure 6 The third wall 431 extends in a direction with an angle less than 90° with the first direction X, and the fourth wall 432 extends in the second direction Y. Along the first direction X, the distance between the third wall 431 and the second shell 30 in the second direction Y gradually increases, so that the third wall 431 is arranged tilted, and the overall tilt direction of the third wall 431 is opposite to the overall tilt direction of the second wall 412, which is conducive to suppressing the movement of the first sealing member 40 along the first direction X, and is conducive to reducing the risk of the first sealing member 40 partially or completely detaching from the first shell 20 and the second shell 30, and is conducive to improving the sealing performance of the accommodating cavity 21.

[0132] In some other embodiments, the third wall 431 extends in a direction with an angle less than 90° to the first direction X, and along the first direction X, the distance between the third wall 431 and the second shell 30 in the second direction Y gradually decreases, so that the inclined third wall 431 makes it easier for the second elastic portion 43 to enter between the first shell 20 and the second shell 30 when the second shell 30 is installed in the first opening 22 along the first direction X, thereby reducing the risk of damage to the second elastic portion 43.

[0133] Among them, the third wall 431 extends in a direction with an angle less than 90° with the first direction X, which can be understood as the entire third wall 431 extends in a direction with an angle less than 90° with the first direction X. The third wall 431 can be a flat wall, a stepped wall, an arc-shaped wall, or other irregular wall.

[0134] In some embodiments, the second elastic portion 43 may be made of a material that is easily elastically deformed, such as silicone or rubber, to improve the sealing performance of the accommodating cavity 21 .

[0135] In some embodiments, see Figure 6 The first sealing member 40 further includes a second main portion 44 connected to the first main portion 42. The second main portion 44 is located on a side of the first elastic portion 41 facing away from the second elastic portion 43. The second main portion 44 is connected to the second housing 30 and to a side of the first housing 20 opposite to the first direction X. The second main portion 44 is connected to the first housing 20 in a direction opposite to the first direction X, which helps limit movement of the first sealing member 40 in the first direction X, thereby limiting movement of the first housing 20 in a direction opposite to the first direction X, thereby improving the stability of the connection between the first housing 20 and the second housing 30.

[0136] In some embodiments, see Figure 6 , along the first direction X, the distance between the second main body portion 44 and the first elastic portion 41 is L b , satisfying L b >W up After the first elastic portion 41 is subjected to the force of the first shell 20 and the second shell 30, it may deform toward the second main body portion 44. b >W up This helps reduce the risk of the second main body portion 44 and the first elastic member being squeezed against each other, thereby reducing the risk of the second main body portion 44 interfering with the deformation of the first elastic portion 41 and reducing the sealing performance.

[0137] In some embodiments, the distance L between the second main body portion 44 and the first elastic portion 41 is bWhen the first elastic portion 41 is in a state where it is not subjected to the force of the first shell 20 and the second shell 30 , it can also be in a state where it is subjected to the force of the first shell 20 and the second shell 30 .

[0138] In some embodiments, see Figure 7 Along the first direction X, the first protrusion 23 includes a fifth wall 231 and a sixth wall 232 arranged in sequence. The fifth wall 231 and the sixth wall 232 can be directly connected, and other walls can also be arranged between the fifth wall 231 and the sixth wall 232. No specific limitation is made here.

[0139] In some embodiments, see Figure 5 and Figure 7 The fifth wall 231 extends in a direction forming an angle less than 90° with the first direction X. Along the first direction X, the distance between the fifth wall 231 and the first housing 20 in the second direction Y gradually increases. The sixth wall 232 extends along the second direction Y. The inclined fifth wall 231 of the first protrusion 23 facilitates guiding the second protrusion 31. This reduces the difficulty of the second protrusion 31 moving over the first protrusion 23 to the side of the first protrusion 23 in the first direction X when the second housing 30 is installed in the first opening 22 along the first direction X. This facilitates installation and reduces the risk of damage from excessive compressive force between the first and second protrusions 23, 31.

[0140] In some embodiments, see Figure 6 Along the first direction X, the second protrusion 31 includes a seventh wall 311 and an eighth wall 312 arranged in sequence. The seventh wall 311 and the eighth wall 312 can be directly connected, and other walls can also be arranged between the seventh wall 311 and the eighth wall 312. No specific limitation is made here.

[0141] In some embodiments, see Figure 5 and Figure 6 The seventh wall 311 extends along the second direction Y, and the eighth wall 312 extends along a direction forming an angle less than 90° with the first direction X. Along the first direction X, the distance between the eighth wall 312 and the second housing 30 in the second direction Y gradually decreases. The eighth wall 312 of the second protrusion 31 and the fifth wall 231 are inclined in substantially the same direction. This further reduces the difficulty of the second protrusion 31 moving over the first protrusion 23 to the side of the first protrusion 23 in the first direction X when the second housing 30 is installed in the first opening 22 along the first direction X. This facilitates installation and reduces the risk of damage from excessive compressive force between the first protrusion 23 and the second protrusion 31.

[0142] In some embodiments, see Figure 5 and Figure 7Along the first direction X, the first housing 20 includes a third portion 25 located between the first opening 22 and the first protrusion 23, and a fourth portion 26 located on the side of the first protrusion 23 away from the first opening 22. Along the second direction Y, the thickness of the third portion 25 is W1, and the thickness of the fourth portion 26 is W2, satisfying W1>W2, which helps to increase the length of the second protrusion 31 along the second direction Y.

[0143] In some embodiments, the second protrusion 31 can be set to be in direct contact with the fourth part 26 or separated from the fourth part 26. On the basis of satisfying W1>W2, when the second shell 30 is installed in the first opening 22 along the first direction X, the second protrusion 31 will first abut against the third part 25 and be subjected to the force of the third part 25, so that the part of the second shell 30 provided with the second protrusion 31 is deformed in the direction opposite to the second direction Y, until the second protrusion 31 passes over the first protrusion 23 along the first direction X, and the second protrusion 31 is no longer subjected to the force and drives the second shell 30 to deform.

[0144] It can be understood that when the second shell 30 is installed in the first opening 22 along the first direction X, the part of the second shell 30 provided with the second protrusion 31 is deformed in the direction opposite to the second direction Y, which is conducive to the first elastic part 41 entering between the first shell 20 and the second shell 30.

[0145] In some embodiments, see Figure 5 and Figure 7 The second protrusion 31 contacts the fourth part 26, which is beneficial to limit the displacement of the second shell 30 relative to the first shell 20 in the second direction Y or the direction opposite to the second direction Y, thereby improving the stability of the snap connection between the first shell 20 and the second shell 30.

[0146] In some embodiments, see Figure 5 and Figure 7 An adhesive material (not shown) is provided between the first protrusion 23 and the second protrusion 31. The adhesive material bonds the first protrusion 23 and the second protrusion 31, which is beneficial to improving the stability of the connection between the first shell 20 and the second shell 30, and is beneficial to further improving the sealing of the accommodating cavity 21.

[0147] In some embodiments, the adhesive material may be glue such as structural adhesive, or may be a double-sided adhesive tape, which is not specifically limited here.

[0148] In some embodiments, see Figures 5 to 7The first shell 20 is further provided with a third protrusion 24, which is located on one side of the first protrusion 23 along the first direction X. The second shell 30 is further provided with a fourth protrusion 34, which is located on one side of the second protrusion 31 along the first direction X. In the direction opposite to the first direction X, the fourth protrusion 34 is configured to abut against the third protrusion 24 when the second shell 30 moves relative to the first shell 20, thereby further limiting the movement of the second shell 30 relative to the first shell 20 in the direction opposite to the first direction X.

[0149] It can be understood that after the second shell 30 is installed in the first opening 22 along the first direction X, the third protrusion 24 and the fourth protrusion 34 can improve the effect of limiting the movement of the second shell 30 relative to the first shell 20 in the opposite direction of the first direction X, which is beneficial to improving the stability of the engagement between the first shell 20 and the second shell 30.

[0150] In other embodiments, the first shell 20 and the second shell 30 may be provided with more engaging protrusions, which are not specifically limited here.

[0151] In some embodiments, see Figure 5 Along the first direction X, the first shell 20 also includes a fifth portion 27 located on the side of the third protrusion 24 away from the first protrusion 23. Along the second direction Y, the thickness of the fifth portion 27 is W3, satisfying W1>W2 and W1>W3, which is beneficial to increasing the length of the second protrusion 31 and the fourth protrusion 34 along the second direction Y, and is beneficial to increasing the area of ​​the connection between the second protrusion 31 and the first protrusion 23, further improving the stability of the connection between the second protrusion 31 and the first protrusion 23.

[0152] In some embodiments, the second protrusion 31 can be set to be exactly in contact with the fourth part 26 or separated from the fourth part 26, and the fourth protrusion 34 can be exactly in contact with the fifth part 27 or separated from the fifth part 27. On the basis of satisfying W1>W2 and W1>W3, when the second shell 30 is installed in the first opening 22 along the first direction X, the second protrusion 31 and the fourth protrusion 34 will first abut against the third part 25 and be subjected to the force of the third part 25, so that the part of the second shell 30 provided with the second protrusion 31 and the fourth protrusion 34 is deformed in the direction opposite to the second direction Y, until the second protrusion 31 passes over the first protrusion 23 along the first direction X and the fourth protrusion 34 passes over the third protrusion 24 along the first direction X, at which time the second protrusion 31 and the fourth protrusion 34 are no longer subjected to the force and drive the second shell 30 to deform.

[0153] It can be understood that during the process of the second shell 30 being installed in the first opening 22 along the first direction X, the portion of the second shell 30 provided with the second protrusion 31 and the portion provided with the fourth protrusion 34 are deformed in a direction opposite to the second direction Y, which is conducive to the first elastic part 41 entering between the first shell 20 and the second shell 30.

[0154] In some embodiments, see Figure 5 The fourth protrusion 34 contacts the fifth part 27, which is beneficial to limiting the displacement of the second shell 30 relative to the first shell 20 in the second direction Y or the direction opposite to the second direction Y, thereby improving the stability of the snap connection between the first shell 20 and the second shell 30.

[0155] In some embodiments, see Figure 5 Along the second direction Y, the distance between the third portion 25 and the second shell 30 is W4, and the length of the second protrusion 31 is W5, satisfying W4<W5. This is conducive to the second protrusion 31 exerting an interactive force with the third portion 25 during the process of the second shell 30 being installed in the first opening 22 along the first direction X, so that the portion of the second shell 30 provided with the second protrusion 31 is deformed in a direction opposite to the second direction Y, which is conducive to the first elastic portion 41 entering between the first shell 20 and the second shell 30.

[0156] In some embodiments, see Figure 5 , along the second direction Y, the length of the fourth protrusion 34 is W6, satisfying W4<W5 and W4<W6, which is conducive to the second protrusion 31 and the fourth protrusion 34 exerting an interactive force with the third part 25 during the process of the second shell 30 being installed in the first opening 22 along the first direction X, so that the part of the second shell 30 provided with the second protrusion 31 and the fourth protrusion 34 is deformed in the direction opposite to the second direction Y, which is conducive to the first elastic portion 41 entering between the first shell 20 and the second shell 30.

[0157] In some embodiments, see Figure 5 , satisfying W2+W5≤W1+W4, which helps to reduce the risk of the fourth part 26 exerting an effect on the second protrusion 31 to cause deformation of the second shell 30.

[0158] In some embodiments, adhesive material is provided on the first protrusion 23, the second protrusion 31, the third protrusion 24, the fourth protrusion 34, the fourth part 26 and the fifth part 27, which is conducive to the adhesion of the second protrusion 31 to the first protrusion 23 and the fourth part 26, and the adhesion of the fourth protrusion 34 to the third protrusion 24 and the fifth part 27, thereby facilitating the displacement of the second shell 30 relative to the first shell 20, thereby improving the stability of the snap connection between the first shell 20 and the second shell 30.

[0159] In some embodiments, the adhesive material may be glue such as structural adhesive, or may be a double-sided adhesive tape, which is not specifically limited here.

[0160] In some embodiments, see Figure 8 Along the first direction X, the length of the fourth portion 26 is L1, the thickness of the third protrusion 24 is L2, the length of the fifth portion 27 is L3, the thickness of the second protrusion 31 is L4, the distance between the second protrusion 31 and the fourth protrusion 34 is L5, and the thickness of the fourth protrusion 34 is L6, satisfying L4≤L1, L6≤L3, L2≤L5, L1+L2≤L4+L5, L4+L5+L6≤L1+L2+L3, which is conducive to allowing the second protrusion 31 to extend between the first protrusion 23 and the third protrusion 24, and is conducive to the fourth protrusion 34 being able to move to the side of the third protrusion 24 away from the first protrusion 23, thereby reducing the risk of interference between the first protrusion 23 and the third protrusion 24 and the second protrusion 31 and the fourth protrusion 34.

[0161] In some embodiments, the first housing 20 and the second housing 30 can be made of metal materials such as aluminum or copper, or non-metal materials such as plastic. The materials of the first housing 20 and the second housing 30 can be the same or different. As an example, the first housing 20 is an aluminum housing and the second housing 30 is a plastic housing.

[0162] In some embodiments, see Figure 9 The first housing 20 further comprises a second opening 28 communicating with the accommodating cavity 21 and a fifth protrusion 29. The electrochemical device 100 further comprises a third housing 50 and a second sealing member 60. The third housing 50 is disposed at the second opening 28 and is located on one side of the second housing 30 in the first direction X. The third housing 50 comprises a sixth protrusion 51, located on one side of the fifth protrusion 29 in a direction opposite to the first direction X. In the first direction X, the sixth protrusion 51 is configured to abut against the fifth protrusion 29 when the third housing 50 moves relative to the first housing 20. The second sealing member 60 comprises a third elastic portion 61, disposed around the second opening 28 and disposed between the first housing 20 and the third housing 50 in the second direction Y. The third elastic portion 61 is connected to the first housing. At least a portion of the third elastic portion 61 is in a compressive deformation state, and the first housing 20 and the third housing 50 exert a compressive force on the third elastic portion 61.

[0163] It is understood that after the third housing 50 is installed in the first opening 22, the fifth protrusion 29 and the sixth protrusion 51 abut against each other, thereby limiting the movement of the third housing 50 relative to the first housing 20 in the first direction X. The first elastic portion 41 enters between the first housing 20 and the third housing 50 and is compressed and deformed by the forces acting on them, thereby achieving a sealed engagement between the first housing 20 and the third housing 50. Compared to a solution in which bolts are sequentially passed through the first housing 20, the second housing 30, and the third housing 50 to connect them, the first housing 20 and the third housing 50 of the present application are sealedly engaged via the fifth protrusion 29, the sixth protrusion 51, and the second sealing member 60. This reduces the space occupied by the connection structure within the accommodating cavity 21 and eliminates the need for screw hole provision and bolt tightening, thereby improving the energy density, sealing performance, and assembly efficiency of the electrochemical device 100.

[0164] In some embodiments, see Figure 10 The first housing 20 includes a first sidewall 20a, a second sidewall 20b, a third sidewall 20c, and a fourth sidewall 20d, which are connected in sequence. The first sidewall 20a and the third sidewall 20c are arranged opposite each other along the second direction Y, and the second sidewall 20b and the fourth sidewall 20d are arranged opposite each other along the third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y. The first sidewall 20a, the second sidewall 20b, the third sidewall 20c, and the fourth sidewall 20d enclose a receiving cavity 21. The first sidewall 20a, the second sidewall 20b, the third sidewall 20c, and the fourth sidewall 20d form a first opening 22 that communicates with the receiving cavity 21 along one side in the first direction X. The first sidewall 20a, the second sidewall 20b, the third sidewall 20c, and the fourth sidewall 20d form a second opening 28 that communicates with the receiving cavity 21 along a side in the first direction X away from the first opening 22.

[0165] In some embodiments, see Figure 9 The fifth protrusion 29 , the sixth protrusion 51 and at least a portion of the third elastic portion 61 are all located outside the accommodating cavity 21 , and the third elastic portion 61 is disposed outside the accommodating cavity 21 around the second opening 28 .

[0166] In some other embodiments, the fifth protrusion 29 , the sixth protrusion 51 and at least a portion of the third elastic portion 61 are all located in the accommodating cavity 21 , and the third elastic portion 61 is disposed around the second opening 28 in the accommodating cavity 21 .

[0167] In some embodiments, the implementation of the engagement between the first shell 20 and the third shell 50 can refer to any implementation of the engagement between the first shell 20 and the second shell 30 described above, and will not be repeated here.

[0168] In some embodiments, the sealing method of the second seal 60 between the first shell 20 and the third shell 50 can refer to any embodiment of the sealing between the first seal 40 and the first shell 20 and the second shell 30, and will not be repeated here.

[0169] In some embodiments, the electrochemical device 100 is assembled by the following steps:

[0170] Connecting step: connecting the first sealing member 40 to the second housing 30 .

[0171] Glue coating step: coating glue on the surface of the first shell 20 on the side where the first protrusion 23 is provided.

[0172] Shell assembly step: Install the second shell 30 in the first opening 22 along the first direction X until the second protrusion 31 passes over the first protrusion 23 along the first direction and is located on one side of the first protrusion 23 in the first direction X, and the first elastic portion 41 enters between the first shell 20 and the second shell 30.

[0173] In some embodiments, the first sealing member 40 and the second housing 30 may be connected by bonding, welding, or pressing.

[0174] See also Figure 11 The embodiments of the present application also provide an electrical device 1000, which includes a device body 200 and an electrochemical device 100 as in any of the above embodiments. The electrochemical device 100 is installed on the device body 200. The sealing effect of the electrochemical device 100 is improved, which is beneficial to reducing the failure rate and service life of the electrochemical device 100, and further beneficial to improving the reliability of the electrical device 1000.

[0175] Since the electrical equipment 1000 includes the technical solution of any of the above-mentioned embodiments of the electrochemical device 100 , it at least has the beneficial effects brought by the technical solution of any of the above-mentioned embodiments of the electrochemical device 100 , which will not be described in detail here.

[0176] Among them, the electrical equipment 1000 can be a drone, an electric two-wheeled vehicle, a cleaning robot, an energy storage device or an electric tool, etc.

[0177] In addition, those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the substantive scope of the present application, appropriate changes and modifications to the above embodiments are within the scope disclosed in the present application.

Claims

1. An electrochemical device, characterized in that include: Battery pack; a first shell, comprising a receiving cavity and a first opening communicating with the receiving cavity, wherein the receiving cavity accommodates the battery pack, and wherein the first shell comprises a first protrusion; a second housing disposed at the first opening, the second housing having a second protrusion disposed thereon, the second protrusion being located on one side of the first protrusion in a first direction, and being configured to abut against the first protrusion in a direction opposite to the first direction when the second housing moves relative to the first housing; The first direction is the installation direction of the second shell installed in the first opening; a first sealing member including a first elastic portion, the first elastic portion being disposed around the first opening and being disposed between the first shell and the second shell along a second direction perpendicular to the first direction, the first elastic portion being connected to the first shell; the second direction being a direction from the center of the first opening toward an edge of the first opening; Wherein, along the first direction, the first housing includes a third portion located between the first opening and the first protrusion; Along the second direction, the distance between the third portion and the second shell is W4, and the length of the second protrusion is W5, satisfying W4<W5.

2. The electrochemical device according to claim 1, wherein Along the first direction, the second shell includes a first portion adjacent to the first opening and a second portion away from the first opening, the first elastic portion is disposed between the first shell and the first portion, and the second protrusion is disposed on the second portion.

3. The electrochemical device according to claim 2, characterized in that The first sealing member further includes a first main body connected to the first elastic portion. The first main body is disposed between the first shell and the first part and is sealed to the first part. The first elastic portion and the first shell are in contact with each other.

4. The electrochemical device according to claim 3, characterized in that Along the first direction, the first elastic portion includes a first wall and a second wall arranged in sequence, the first wall extends along the second direction, and the second wall extends in a direction with an angle less than 90° to the first direction. Along the first direction, the distance between the second wall and the second shell in the second direction gradually decreases.

5. The electrochemical device according to claim 3, characterized in that The first sealing member further includes a second elastic portion connected to the first main body portion, the second elastic portion is arranged around the first opening, and the first elastic portion and the second elastic portion are arranged in sequence along the first direction; Along the second direction, the length of the first elastic portion is W up , the length of the second elastic portion is W dw , along the first direction, the distance between the first elastic portion and the second elastic portion is L a , satisfying L a >W up And L a >W dw .

6. The electrochemical device according to claim 5, characterized in that Along the first direction, the second elastic portion includes a third wall and a fourth wall arranged in sequence, the third wall extends in a direction with an angle less than 90° with the first direction, and the fourth wall extends along the second direction. Along the first direction, the distance between the third wall and the second shell in the second direction gradually increases.

7. The electrochemical device according to claim 5, characterized in that The first seal also includes a second main body connected to the first main body, the second main body is located on the side of the first elastic part away from the second elastic part, the second main body is connected to the second shell, and is connected to the side of the first shell in the opposite direction of the first direction.

8. The electrochemical device according to claim 7, characterized in that Along the first direction, the distance between the second main body and the first elastic part is L b , satisfying L b >W up .

9. The electrochemical device according to claim 1, wherein Along the first direction, the first protrusion includes a fifth wall and a sixth wall arranged in sequence, the fifth wall extends in a direction at an angle less than 90° with the first direction, so as to gradually move away from the outer wall of the first shell in the opposite direction of the second direction, and the sixth wall extends along the second direction.

10. The electrochemical device according to claim 9, characterized in that Along the first direction, the second protrusion includes a seventh wall and an eighth wall arranged in sequence, the seventh wall extends along the second direction, and the eighth wall extends in a direction at an angle less than 90° to the first direction, so as to gradually move away from the outer wall of the first shell in the opposite direction of the second direction.

11. The electrochemical device according to claim 1, wherein An adhesive material is provided between the first protrusion and the second protrusion, and the adhesive material bonds the first protrusion and the second protrusion.

12. The electrochemical device according to claim 1, wherein The first shell is also provided with a third protrusion, which is located on one side of the first protrusion along the first direction. The second shell is also provided with a fourth protrusion, which is located on one side of the second protrusion along the first direction. In a direction opposite to the first direction, the fourth protrusion is configured to abut against the third protrusion when the second shell moves relative to the first shell.

13. The electrochemical device according to claim 12, characterized in that Along the first direction, the first shell includes a fourth part located between the first protrusion and the third protrusion, and a fifth part located on the side of the third protrusion away from the first protrusion. Along the second direction, the thickness of the third part is W1, the thickness of the fourth part is W2, and the thickness of the fifth part is W3, satisfying W1>W2, W1>W3.

14. The electrochemical device according to claim 13, wherein Along the second direction, the length of the fourth protrusion is W6, satisfying W4<W6.

15. The electrochemical device according to claim 14, characterized in that Along the second direction, W2+W5≤W1+W4 is satisfied.

16. The electrochemical device according to claim 13, wherein The second protrusion contacts the fourth portion, and the fourth protrusion contacts the fifth portion.

17. The electrochemical device according to claim 13, wherein Adhesive material is provided on the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fourth part and the fifth part.

18. The electrochemical device according to claim 13, wherein Along the first direction, the length of the fourth part is L1, the thickness of the third protrusion is L2, the length of the fifth part is L3, the thickness of the second protrusion is L4, the distance between the second protrusion and the fourth protrusion is L5, and the thickness of the fourth protrusion is L6, satisfying L4≤L1, L6≤L3, L2≤L5, L1+L2≤L4+L5, L4+L5+L6≤L1+L2+L3.

19. The electrochemical device according to claim 1, wherein The first shell further comprises a second opening communicating with the accommodating cavity, the first shell further comprises a fifth protrusion, and the electrochemical device further comprises: a third housing provided at the second opening and located on one side of the second housing in the first direction, the third housing being provided with a sixth protrusion, the sixth protrusion being located on one side of the fifth protrusion in a direction opposite to the first direction, and the sixth protrusion being configured to abut against the fifth protrusion when the third housing moves relative to the first housing in the first direction; The second sealing member includes a third elastic portion, which is arranged around the second opening and between the first shell and the third shell along the second direction. The third elastic portion is connected to the first shell.

20. An electrical device, characterized in that: The device comprises an apparatus body and the electrochemical device according to any one of claims 1 to 19, wherein the electrochemical device is mounted on the apparatus body.

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