Battery and battery pack

Abstract

The utility model discloses a battery. The battery comprises a battery cell, a shell, a cover body and a sealing element, the shell is provided with a containing cavity used for containing a battery cell, the containing cavity is provided with a cavity opening, the cover body covers the cavity opening in a sealing mode, a mounting part is arranged on the side, facing the cavity opening, of the cover body, the mounting part extends into the containing cavity and is detachably connected with the shell, and the sealing piece is arranged on the circumferential outer surface of the mounting part in a surrounding mode and used for sealing a gap between the cover body and the shell. The cavity opening of the shell is sealed through the cover body, the mounting part is arranged on the side, facing the cavity opening of the shell, of the cover body, the mounting part extends into the containing cavity of the shell, and the mounting part is detachably connected with the shell, so that the battery is convenient to assemble, disassemble and maintain; meanwhile, the sealing element is arranged on the circumferential outer surface of the mounting part in a surrounding manner, so that a gap between the cover body and the shell can be sealed, and external impurities are prevented from entering the battery from the gap to influence the performance of the battery.

Description

Technical Field

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

[0002] With the advent of the mobile terminal era, smart electronic products such as tablets and laptops have developed rapidly in recent years. Batteries are the main components of these electronic products. A battery consists of a battery casing, a cover, and a battery cell. After the battery casing and cover are connected, there are often assembly gaps at the joints. The sealing effect at these assembly gaps plays an important role in the safety performance of the battery.

[0003] In related technologies, water is prevented from entering the battery casing through the assembly gap between the battery casing and the cover by filling the gap with sealant, thereby improving the sealing effect of the battery. However, the battery structure using related technologies is not convenient for battery assembly and disassembly. Utility Model Content

[0004] This application aims to provide a battery and battery pack that can solve the problem that battery structures in related technologies are inconvenient to assemble and disassemble.

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

[0006] In a first aspect, embodiments of this application provide a battery, comprising: a cell, a casing, a cover, and a seal;

[0007] The housing has a receiving cavity for placing the battery cell. The receiving cavity has an opening. The cover is placed over the opening. The cover has a mounting part on the side facing the opening. The mounting part extends into the receiving cavity and is detachably connected to the housing. The sealing element is arranged around the circumferential outer surface of the mounting part to seal the gap between the cover and the housing.

[0008] Optionally, the seal includes a main body having a first connecting end and a second connecting end opposite each other. The first connecting end has a first step, and the second connecting end has a second step. The main body is disposed around the circumferential outer surface of the mounting part, and the first step and the second step are mated together.

[0009] Optionally, the seal further includes an extension, the mounting portion having a groove on one side facing the receiving cavity, one side of the extension being connected to the main body, and the other side of the extension extending to cover the circumferential inner surface of the mounting portion.

[0010] Optionally, the circumferential inner surface of the mounting portion has a corner, and the extension portion has an opening at a position corresponding to the corner.

[0011] Optionally, the battery further includes a fastener, a first mounting hole is provided at one end of the housing near the cavity, a second mounting hole is provided at the mounting part, and the fastener passes through the first mounting hole and the seal is detachably connected to the second mounting hole.

[0012] And / or, both the first mounting hole and the second mounting hole are provided in multiples, the multiple first mounting holes are arranged at intervals along the circumference of the housing, the multiple second mounting holes are arranged at intervals along the circumference of the mounting portion, and each first mounting hole corresponds to each second mounting hole.

[0013] Optionally, the seal has a through hole at a position corresponding to the second mounting hole, and the fastener passes through the through hole and is detachably connected to the second mounting hole; along the axial direction of the second mounting hole, the projected area of ​​the through hole is greater than or equal to that of the second mounting hole.

[0014] Optionally, the seal has an adhesive layer on the side facing the mounting portion, and the adhesive layer is in contact with the mounting portion.

[0015] Optionally, the seal is a compressible elastic seal.

[0016] Optionally, the seal is a foam component.

[0017] Secondly, embodiments of this application provide a battery pack including any of the batteries described above.

[0018] In the embodiments of this application, the cavity of the housing is sealed by a cover, and a mounting part is provided on the side of the cover facing the cavity of the housing, so that the mounting part extends into the receiving cavity of the housing. The mounting part is detachably connected to the housing, which facilitates the assembly, disassembly and maintenance of the battery. At the same time, by providing a sealing element around the circumferential outer surface of the mounting part, the gap between the cover and the housing can be sealed to prevent external impurities from entering the interior of the battery through the gap and affecting the performance of the battery. This helps to improve the safety of the battery and extend its service life.

[0019] 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

[0020] 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:

[0021] Figure 1 This is a schematic diagram of the battery structure according to an embodiment of this application;

[0022] Figure 2 This is a structural schematic diagram of the seal according to the embodiments of this application;

[0023] Figure 3 According to the embodiments of this application, the sealing element is along Figure 2 Schematic diagram of the cross section of line AA in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the cover according to an embodiment of this application.

[0025] Figure label:

[0026] 100: Housing; 110: Receiving cavity; 1210: First mounting hole; 200: Cover; 210: Mounting part; 2110: Groove; 2120: Corner; 2130: Second mounting hole; 300: Seal; 310: Main body; 3110: First connecting end; 3120: Second connecting end; 3130: Through hole; 320: Extension; 3210: Opening; 400: Fastener; 500: Adhesive layer. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Before explaining the battery and battery pack in the embodiments of this application, the application scenarios of the battery and battery pack will be described in detail:

[0032] A battery consists of a cell, a casing, and a cover. The casing has a cavity with an opening to facilitate the placement of the cell. The cover is used to assemble the battery with the casing, thus sealing the cavity. During the battery assembly process, gaps often remain between the cover and the casing after assembly. This allows external impurities to enter the battery casing through these gaps, potentially damaging the battery's performance and safety.

[0033] The relevant technology involves setting a glue groove at the assembly joint of the battery casing or cover, and filling the gap between the battery casing and the cover by injecting sealant into the glue groove, thereby preventing external impurities from entering the interior of the battery casing from these gaps and adversely affecting the performance of the battery.

[0034] Although this sealant can achieve a sealing and connection effect, if the battery needs to be disassembled and repaired, the battery can only be removed by breaking the cover. This makes it impossible to reassemble the original battery cover with the casing after repair, which can easily lead to waste of production materials and increase production costs.

[0035] Therefore, this application provides a battery and battery pack, which facilitates battery assembly or disassembly and maintenance, and also improves the battery's sealing performance, preventing external impurities from entering the casing through the gap between the battery cover and the casing, thus affecting the battery's performance and safety.

[0036] The battery and battery pack provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0037] like Figure 1As shown, a battery according to some embodiments of this application includes: a battery cell, a housing 100, a cover 200, and a seal 300; the housing 100 is provided with a receiving cavity 110 for placing the battery cell, the receiving cavity 110 has an opening, the cover 200 covers the opening, the cover 200 is provided with a mounting portion 210 on the side facing the opening, the mounting portion 210 extends into the receiving cavity 110 and is detachably connected to the housing 100, and the seal 300 is disposed around the circumferential outer surface of the mounting portion 210 for sealing the gap between the cover 200 and the housing 100.

[0038] In the embodiments of this application, the cavity of the housing 100 is sealed by the cover 200. A mounting part 210 is provided on the side of the cover 200 facing the cavity of the housing, so that the mounting part 210 extends into the receiving cavity 110 of the housing 100. The mounting part 210 is detachably connected to the housing 100, which facilitates the assembly, disassembly and maintenance of the battery. At the same time, by providing a sealing element 300 around the circumferential outer surface of the mounting part 210, the gap between the cover 200 and the housing 100 can be sealed to prevent external impurities from entering the battery through the gap and affecting the battery performance. This helps to improve the battery safety and extend the battery life.

[0039] Specifically, the battery includes a cell (not shown in the figure), a housing 100, a cover 200, and a seal 300. The housing 100 has a receiving cavity 110 with an opening for inserting the cell into it. The cover 200 seals the opening. The cover 200 has a mounting portion 210 on the side facing the receiving cavity 110. The seal 300 is attached to the circumferential outer surface of the mounting portion 210. The mounting portion 210 and the seal 300 extend into the receiving cavity 110 of the housing 100. The cover 200 is detachably connected to the housing 100 through the mounting portion 210.

[0040] For example, the detachable connection between the cover 200 and the housing 100 can be achieved by a snap-fit ​​connection. This is accomplished by providing a locking platform on the circumferential side of the mounting portion 210 and a locking groove on the housing 100 near the cavity opening. The snap-fit ​​action between the groove and the platform enables the detachable connection between the housing 100 and the cover 200. Of course, the detachable connection between the housing 100 and the cover 200 can also be achieved by screw connection, bolt connection, or plug-in connection, etc., which can be flexibly selected according to actual process requirements. This embodiment does not impose any limitations on this method. It is understood that in this application, by providing a mounting part 210 in the cover 200, the mounting part 210 extends into the cavity of the receiving cavity 110, and is detachably connected to the housing 100 through the mounting part 210, and a sealing element is provided between the mounting part 210 and the housing 100, that is, in this application, the mounting part 210 serves as both a connection part and a sealing part, thereby achieving a sealing function while facilitating the connection and fixation between the cover 200 and the housing 100, without the need for an additional connection structure between the housing 100 and the cover 200, avoiding the occupation of the internal space of the housing 100 by the connection structure, thereby helping to improve the energy density of the battery.

[0041] Optionally, such as Figure 2 As shown, the sealing member 300 includes a main body 310, which has a first connecting end 3110 and a second connecting end 3120. The first connecting end 3110 is provided with a first step portion, and the second connecting end 3120 is provided with a second step portion. The sealing member 300 is disposed around the circumferential outer surface of the mounting part 210, and the first step portion and the second step portion are mated together.

[0042] In the embodiments of this application, a first step portion is provided at the first connecting end 3110 of the main body portion 310 of the sealing member 300, and a second step portion is provided at the second connecting end 3120 of the main body portion 310. This allows the first step portion to mate with the second step portion when the main body portion 310 is fitted around the circumferential outer surface of the mounting portion 210. This avoids the first connecting end 3110 and the second connecting end 3120 of the main body portion 310 overlapping at the interface position, which would result in a relatively large thickness of the main body portion 310 at the interface position. This would affect the fit between the mounting portion 210 and the housing 100, and consequently affect the smoothness of the mounting portion 210 when it extends into the housing 100 receiving cavity 110. In other words, the mating between the first step portion and the second step portion ensures the consistency of the thickness of the main body portion 310 of the sealing member 300 when it is fitted around the circumferential surface of the mounting portion 210, thereby facilitating the assembly and disassembly of the battery housing 100 and the cover 200. In addition, the docking between the first step and the second step not only improves the alignment accuracy of the connection between the first connecting end 3110 and the second connecting end 3120 of the main body 310, but also facilitates the operation of the staff and improves production efficiency.

[0043] It is understood that the specific shapes of the first step and the second step can be flexibly set according to actual process requirements. For example, the shapes of the first step and the second step can be set as L-shaped, S-shaped or T-shaped structures. That is, the shapes of the first step and the second step can meet the requirement that they can be connected to each other. This embodiment does not limit them.

[0044] Optionally, such as Figure 2 and Figure 4 As shown, the seal 300 also includes an extension 320. The mounting portion 210 has a groove 2110 on the side facing the receiving cavity 110. One side of the extension 320 is connected to the main body portion 310, and the other side of the extension 320 extends to cover the circumferential inner surface of the mounting portion 210.

[0045] In this embodiment, by providing an extension 320, with one side of the extension 320 connected to the main body 310 and the other side of the extension 320 extending to cover the circumferential inner surface of the mounting part 210, not only can the contact area between the seal 300 and the mounting part 210 be increased, and the bonding strength between the main body 310 and the mounting part 210 be improved, but the phenomenon of the main body 310 at the edge of the mounting part 210 lifting or detaching when the main body 310 is in contact with the outer peripheral surface of the mounting part 210 can also be avoided.

[0046] Specifically, the mounting portion 210 is provided with a groove 2110 on the side facing the housing 100 receiving cavity 110. The groove 2110 has a groove wall. The main body portion 310 is attached to the outer surface of the mounting portion 210 in the circumferential direction. One side of the extension portion 320 is connected to the main body portion 310, and the other side is attached to the groove wall.

[0047] Optionally, such as Figure 3 As shown, the circumferential inner surface of the mounting portion 210 has a corner 2120, and the extension portion 320 has an opening 3210 at a position corresponding to the corner 2120.

[0048] In this embodiment, by providing an opening 3210 on the extension 320 at the position corresponding to the corner 2120, it is possible to prevent the main body 310, which is attached to the circumferential outer surface of the mounting part 210, from lifting or detaching due to the extension 320's inability to contact the groove wall at the corner 2120. At the same time, by providing an opening 3210 at the position corresponding to the corner 2120 on the extension 320, the extension 320 can better fit with the non-corner position of the circumferential inner surface of the mounting part 210, thereby improving the bonding strength between the main body 310 and the mounting part 210.

[0049] Specifically, the groove 2110 has two opposing first groove walls and two opposing second groove walls, and a corner 2120 is formed at the connection between adjacent first and second groove walls. The extension 320 has an opening 3210 at a position corresponding to the corner 2120. The specific shape, size, and number of the openings 3210 can be flexibly set according to the shape, size, and number of the corners 2120, and this embodiment does not limit them.

[0050] Optionally, such as Figure 1 As shown, the battery also includes a fastener 400. The housing 100 has a first mounting hole 1210 at one end near the cavity opening, and the mounting part 210 has a second mounting hole 2130. The fastener 400 passes through the first mounting hole 1210, and the seal 300 is detachably connected to the second mounting hole 2130.

[0051] In this embodiment, by providing a first mounting hole 1210 near the cavity opening in the housing 100 and a second mounting hole 2130 in the mounting portion 210, it is convenient to use a fastener 400 to pass through the first mounting hole 1210 and the seal 300 to connect with the second mounting hole 2130. In this way, the mounting portion 210 can achieve both connection and sealing with the housing 100, avoiding the need for an additional connection structure between the cover 200 and the housing 100 for their connection and fixation, and helping to improve the space utilization of the housing.

[0052] Specifically, the housing 100 has a first mounting hole 1210 near the cavity opening, and the mounting part 210 has a second mounting hole 2130. The second mounting hole 2130 is a threaded hole. The fastener 400 passes through the first mounting hole 1210 and the sealing member 300 in sequence and is threadedly connected to the second mounting hole 2130, thereby detachably connecting the cover 200 and the housing 100. The second mounting hole 2130 can be a blind hole, meaning that the end of the second mounting hole 2130 away from the sealing member 300 is not connected to the receiving cavity 110. This prevents external impurities from entering the receiving cavity 110 through the second mounting hole 2130, thereby further improving the battery's sealing performance.

[0053] In some embodiments, the fastener 400 may be a bolt with external threads and internal threads in the first mounting hole 1210 and the second mounting hole 2130. By tightening the bolt, the cover 200 and the housing 100 are tightened by the cooperation of the internal and external threads, thereby compressing the seal 300 and causing the seal 300 to deform, thereby fully filling the gap between the cover 200 and the housing 100, thereby improving the sealing performance of the battery.

[0054] It is understood that the specific type of fastener 400 can be flexibly selected according to actual needs, and this embodiment does not limit it.

[0055] Optionally, such as Figure 1 As shown, there are multiple first mounting holes 1210 and multiple second mounting holes 2130. The multiple first mounting holes 1210 are arranged at intervals along the circumference of the housing 100, and the multiple second mounting holes 2130 are arranged at intervals along the circumference of the mounting part 210. Each first mounting hole 1210 corresponds to each second mounting hole 2130.

[0056] In this embodiment, by providing a plurality of first mounting holes 1210 and second mounting holes 2130, with the plurality of first mounting holes 1210 arranged at intervals along the circumference of the housing 100 and the plurality of second mounting holes 2130 arranged at intervals along the circumference of the mounting portion 210, the connection between the cover 200 and the housing 100 can be made more secure, preventing loosening at one of the mounting holes and thus affecting the stability of the connection between the cover 200 and the housing 100. Furthermore, the gap between the cover 200 and the housing 100 can be further reduced, improving the battery's sealing performance.

[0057] It is understandable that the number and position of each first mounting hole 1210 and each second mounting hole 2130 are corresponding. The shapes of the first mounting holes 1210 and the second mounting holes 2130 can be the same or different, as long as the fastener 400 can pass through the first mounting holes 1210 and the second mounting holes 2130.

[0058] It should also be noted that the spacing between two adjacent first mounting holes 1210 and the spacing between two adjacent second mounting holes 2130 can be equal or unequal. When the spacing is equal, the pressure distribution at each first mounting hole 1210 and each second mounting hole 2130 is more uniform, which can improve the stability of the connection between the housing 100 and the cover 200. Of course, the spacing between two adjacent first mounting holes 1210 and the spacing between two adjacent second mounting holes 2130 can be flexibly set according to actual needs, and this embodiment does not limit them.

[0059] Optionally, such as Figure 2 As shown, the seal 300 has a through hole 3130 at a position corresponding to the second mounting hole 2130. The fastener 400 passes through the through hole 3130 and is detachably connected to the second mounting hole 2130 along the axial direction of the second mounting hole 2130. The projected area of ​​the through hole 3130 is greater than or equal to that of the second mounting hole 2130.

[0060] In this embodiment, by providing a through hole 3130 on the seal 300 corresponding to the position of the second mounting hole 2130, the fastener 400 is detachably connected to the second mounting hole 2130 by passing through the through hole 3130. Furthermore, along the axial direction of the second mounting hole 2130, the projected area of ​​the through hole 3130 is larger than the area of ​​the second mounting hole 2130. This allows the fastener 400 to pass through the through hole 3130 more smoothly, thereby improving the efficiency of battery assembly or disassembly.

[0061] Specifically, the through hole 3130 provided on the seal 300 can be either racetrack-shaped or round. The racetrack-shaped through hole 3130 makes it easier for the fastener 400 to pass through, while the round through hole 3130 is not only simple to process, but also reduces the waste of seal 300 material. Of course, the specific shape of the through hole 3130 can be flexibly set according to the actual situation, and this embodiment does not limit it.

[0062] It is understandable that the number and position of the through holes 3130 on the seal 300 correspond to the number and position of the second mounting holes 2130.

[0063] Optionally, such as Figure 3 As shown, the sealing element 300 has an adhesive layer 500 on the side facing the mounting part 210, and the adhesive layer 500 is attached to the mounting part 210.

[0064] In this embodiment, by providing an adhesive layer 500 on the side of the seal 300 facing the mounting portion 210, the seal 300 can be bonded and fixed to the circumference of the mounting portion 210, thereby improving the adhesion between the seal 300 and the mounting portion 210.

[0065] In some embodiments, the adhesive layer 500 may be double-sided adhesive, which has better flatness, which can not only further improve the adhesion between the seal 300 and the mounting part 210, but also improve the thickness consistency of the seal 300 attached to the outer surface of the mounting part 210, thereby enabling the mounting part 210 to better extend into the receiving cavity 110 of the housing 100 and make a detachable connection with the housing 100.

[0066] In some other embodiments, the adhesive layer 500 may be made of an adhesive, which has good bonding effect and low cost, and can not only improve the connection between the seal 300 and the mounting part 210, but also reduce the production cost of the battery.

[0067] It should be noted that the specific type of adhesive layer 500 can be flexibly selected according to actual process requirements, and this embodiment does not limit it.

[0068] Understandably, both the through hole 3130 and the opening 3210 penetrate the adhesive layer 500, which not only allows the fastener 400 to pass through the seal 300 better, but also improves the fit between the seal 300 and the mounting part 210.

[0069] Optionally, the seal 300 is a compressible resilient seal.

[0070] In this embodiment, by setting the seal 300 as a compressible elastic seal, the elasticity and compressibility of the compressible elastic seal can be utilized to better fill the space between the cover 200 and the housing 100, thereby improving the sealing performance of the battery. In addition, since the compressible elastic seal also has a shock-absorbing effect, it can reduce the damage caused by external impact or vibration at the connection between the cover 200 and the housing 100, thereby improving the reliability and stability of the battery.

[0071] Optionally, the seal 300 is a foam component.

[0072] In this embodiment, by selecting foam as the sealing element 300, the good corrosion resistance of the foam can be utilized to improve the sealing effect and stability of the battery. Furthermore, the foam has low cost and is easy to process, which can reduce the production cost of the battery and improve production efficiency.

[0073] In other embodiments, the seal 300 may also be a sheet-like structure made of an elastic sealing material, such as rubber. The sheet-like rubber seal 300 not only has good corrosion resistance, preventing corrosion from acidic or alkaline media, but is also easy to process into different shapes and sizes to adapt to different installation conditions. It is understood that the specific type of seal 300 can be flexibly selected according to actual needs, and this embodiment does not limit it.

[0074] Secondly, embodiments of this application provide a battery pack including any of the batteries described above.

[0075] In the embodiments of this application, the cavity of the housing 100 is sealed by the cover 200. A mounting part 210 is provided on the side of the cover 200 facing the cavity of the housing, so that the mounting part 210 extends into the receiving cavity 110 of the housing 100. The mounting part 210 is detachably connected to the housing 100, which facilitates the assembly, disassembly and maintenance of the battery. At the same time, by providing a sealing element 300 around the circumferential outer surface of the mounting part 210, the gap between the cover 200 and the housing 100 can be sealed to prevent external impurities from entering the battery through the gap and affecting the battery performance. This helps to improve the battery safety and extend the battery life.

[0076] 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.

[0077] 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, characterized in that, include: Battery cell, casing, cover, and seals; The housing has a receiving cavity for placing the battery cell. The receiving cavity has an opening. The cover is placed over the opening. The cover has a mounting part on the side facing the opening. The mounting part extends into the receiving cavity and is detachably connected to the housing. The sealing element is arranged around the circumferential outer surface of the mounting part to seal the gap between the cover and the housing.

2. The battery according to claim 1, characterized in that, The sealing element includes a main body, which has a first connecting end and a second connecting end opposite each other. The first connecting end is provided with a first step, and the second connecting end is provided with a second step. The main body is disposed around the circumferential outer surface of the mounting part, and the first step and the second step are mated together.

3. The battery according to claim 2, characterized in that, The seal also includes an extension, and the mounting portion has a groove on one side facing the receiving cavity. One side of the extension is connected to the main body, and the other side of the extension extends to cover the circumferential inner surface of the mounting portion.

4. The battery according to claim 3, characterized in that, The circumferential inner surface of the mounting portion has a corner, and the extension portion has an opening at a position corresponding to the corner.

5. The battery according to any one of claims 1-4, characterized in that, It also includes fasteners, and the housing has a first mounting hole at one end near the cavity opening, the mounting part has a second mounting hole, the fastener passes through the first mounting hole, and the seal is detachably connected to the second mounting hole; And / or, both the first mounting hole and the second mounting hole are provided in multiples, the multiple first mounting holes are arranged at intervals along the circumference of the housing, the multiple second mounting holes are arranged at intervals along the circumference of the mounting portion, and each first mounting hole corresponds to each second mounting hole.

6. The battery according to claim 5, characterized in that, The seal has a through hole at a position corresponding to the second mounting hole, and the fastener passes through the through hole and is detachably connected to the second mounting hole; along the axial direction of the second mounting hole, the projected area of ​​the through hole is greater than or equal to that of the second mounting hole.

7. The battery according to claim 1, characterized in that, The sealing element has an adhesive layer on the side facing the mounting portion, and the adhesive layer is attached to the mounting portion.

8. The battery according to claim 1, characterized in that, The seal is a compressible elastic seal.

9. The battery according to claim 8, characterized in that, The sealing element is a foam component.

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

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