Housing device and battery pack

Abstract

This application provides a housing device and a battery pack, wherein the housing device includes: a casing, a cover, and a locking member. The casing forms an inner cavity for accommodating the battery; the cover is installed to the casing to close the inner cavity; the locking member is connected between the casing and the cover to lock the casing and the cover; the locking member includes: a clamping part and a fixing part. The clamping part is at least partially located on the side of the cover away from the casing, so that the clamping part and the casing are adapted to clamp the cover; the fixing part is adapted to be coupled to the casing, so that the casing and the cover are fixedly connected by the locking member. By providing the locking member, the clamping part as a whole can restrict the movement of the cover when the cover is subjected to force, and there is no need to use corresponding screw holes on the cover and casing for fixing, which can reduce or even eliminate the use of fixing bolts between the casing and the cover, and there is no need to open holes on the seal between the casing and the cover, the stress distribution on the cover and the seal is more dispersed, and the integrity of the seal is guaranteed.

Description

Technical Field

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

[0002] The battery cells of the battery pack are installed inside the battery box, and the box body and cover are locked together with bolts. In related technologies, this connection method between the box body and cover requires a large number of bolts, making the operation cumbersome. The bolts may loosen during the transportation and use of the battery pack. Furthermore, holes need to be drilled in the seal between the box body and cover for the bolts to pass through. The stress is concentrated in the seal near the drilling location, which poses a risk of cracking after use, affecting the airtightness of the battery pack. Utility Model Content

[0003] The embodiments of this application provide a housing device and a battery pack, which can improve the technical problem of poor airtightness during battery pack use.

[0004] In a first aspect, embodiments of this application provide a housing device for mounting a battery, comprising:

[0005] The housing has an internal cavity for accommodating the battery;

[0006] A lid is installed onto the box body to seal the inner cavity;

[0007] A locking element is connected between the box body and the box lid to lock the box body and the box lid;

[0008] The locking element includes:

[0009] A clamping part, at least a portion of the box cover is located between the clamping part and the box body, so that the clamping part and the box body are adapted to clamp the box cover;

[0010] A fixing part is adapted to be attached to the housing so that the housing and the lid are fixedly connected by the locking member.

[0011] By incorporating a locking mechanism, the lid is clamped between the clamping part and the box body, and the locking mechanism is fixed to the box body. When the lid is subjected to force, the clamping part can restrict the movement of the lid as a whole, and there is no need to use corresponding screw holes on the lid and the box body for fixing. This can reduce or even eliminate the use of fixing bolts between the box body and the lid, making assembly and disassembly more convenient. In addition, no holes are needed on the seal between the box body and the lid, and the stress distribution on the lid and the seal is more dispersed.

[0012] In one embodiment, the clamping portion includes:

[0013] The connecting section is located on the outside of the housing;

[0014] A first clamping segment is formed at one end of the connecting segment;

[0015] The second clamping segment is formed at the end of the connecting segment away from the first clamping segment;

[0016] The first clamping section, the connecting section, and the second clamping section together form a clamping groove; at least a portion of the box body and at least a portion of the box cover are located within the clamping groove.

[0017] The above solution places part of the box body and the box cover in the clamping groove, and the box body and the box cover can be properly configured and positioned to ensure the assembly accuracy of the two.

[0018] In one embodiment, the distance between the groove wall of the first clamping segment forming the clamping groove and the groove wall of the second clamping segment forming the clamping groove is defined as the groove width of the clamping groove, and the distance between the surface of the portion of the box body located in the clamping groove on the side near the first clamping segment and the surface on the side near the second clamping segment is defined as the clamping length of the box body; wherein, the groove width of the clamping groove is greater than or equal to the clamping length of the box body.

[0019] The above solution limits the width of the clamping groove to be greater than or equal to the clamping length of the box body, so that the clamping part is not blocked by the box body and cannot apply pressure to the box body. This ensures that the clamping part can provide pressure to the box cover, thereby stably clamping the box cover between the box body and the clamping part, reducing the shaking of the box cover and ensuring the airtightness of the battery pack with integrated housing device.

[0020] In one embodiment, the housing further includes:

[0021] The mounting part protrudes from one end of the box body near the box cover to form an assembly groove on the periphery of the end of the box body near the box cover.

[0022] The locking member is attached to the housing at the mounting portion, and at least a portion of the locking member is located within the mounting groove.

[0023] In the above solution, the assembly groove allows for pre-positioning of the locking component before it is fixed to the housing by the fixing part. Simultaneously, the assembly groove also helps limit the size of the locking component protruding from the housing in the left-right direction as shown in the figure, thereby achieving control over the overall dimensions of the housing device.

[0024] In one embodiment, the housing device further includes:

[0025] A sealing element is disposed between the housing and the lid.

[0026] The sealing elements ensure that the housing device has sufficient airtightness.

[0027] In one embodiment, the housing is provided with a limiting portion. The limiting portion protrudes from the end face of the housing near the lid; wherein the limiting portion is located around the lid and the seal.

[0028] The above solution can confine the lid and seal within the inner perimeter of the limiting part, positioning the lid and seal during assembly. The seal's position between the box body and lid is relatively stable, ensuring that the seal can provide a normal sealing effect.

[0029] In one embodiment, the housing device further includes:

[0030] A connecting structure is provided between the fixing part and the housing, so that the fixing part is connected to the housing through the connecting structure.

[0031] The above solution can flexibly set the number of connection structures according to usage requirements, so as to use the connection structures to achieve a fixed connection between the locking parts and the housing. The structures on the fixing part that cooperate with the connection structure only need to be set in the corresponding number, and the impact on the structural strength of the locking parts themselves is relatively small.

[0032] In one embodiment, the fixing part is provided with a through hole; the connection structure includes:

[0033] A fixing bolt, at least partially inserted into the through hole, is fixedly connected to the housing.

[0034] In one embodiment, the connection structure includes:

[0035] A connecting nut is attached to the housing; wherein the fixing bolt is threaded to the connecting nut so that the fixing bolt is fixed to the housing by the connecting nut.

[0036] The above solution does not require threaded holes to be formed on the housing. If the threads of the connecting nuts and fixing bolts are damaged due to disassembly or assembly during maintenance, the connection stability between the locking components and the housing can be ensured by replacing the connecting nuts and fixing bolts with new ones.

[0037] In one embodiment, the housing is provided with:

[0038] A stepped groove is formed on the outer side wall of the housing; wherein the connecting nut is embedded in the stepped groove to limit the installation of the connecting nut to the housing.

[0039] The above solution achieves the fixation of the locking component to the housing by preventing the connecting nut from detaching from the housing through the groove wall of the stepped groove after the fixing bolt is screwed into the connecting nut.

[0040] In one embodiment, the wall of the stepped groove is spaced apart from the end face of the box body near the box cover, so that the box cover is located outside the stepped groove; at least a portion of the clamping part is embedded in the stepped groove.

[0041] The above solution reduces the overall size of the locking element and the housing, thereby limiting the overall size of the housing device.

[0042] Secondly, embodiments of this application provide a battery pack including the housing device described above.

[0043] The beneficial effects of the embodiments of this application are as follows:

[0044] In the embodiments of this application, by setting a locking member, the cover is clamped by the clamping part and the housing body, and the locking member is fixed to the housing body. When the cover is subjected to force, the clamping part can restrict the movement of the cover as a whole, and there is no need to use corresponding screw holes on the cover and housing body for fixation. This can reduce or even eliminate the use of fixing bolts between the housing body and the cover, making assembly and disassembly more convenient. Furthermore, no holes are needed on the seal between the housing body and the cover, and the stress distribution on the cover and the seal is more dispersed, ensuring the integrity of the seal and improving the sealing effect. This improves the technical problem of insufficient airtightness of the battery pack. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is an exploded view of the housing assembly provided in an embodiment of this application;

[0047] Figure 2 yes Figure 1 A cross-sectional view of the housing assembly shown;

[0048] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0049] Figure 4 yes Figure 1 A sectional view of the box-shaped structure shown;

[0050] Figure 5 yes Figure 1 The shown is a cross-sectional view of the locking component.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100. Housing assembly;

[0053] 110. Housing; 110a. Inner cavity; 110b. Stepped groove; 110c. Lifting groove; 111. Mounting part; 111a. Assembly groove; 112. Limiting part;

[0054] 120. Box lid;

[0055] 130. Locking element; 131. Clamping part; 131a. Connecting section; 131b. First clamping section; 131c. Second clamping section; 131d. Clamping groove; 132. Fixing part; 132a. Through hole;

[0056] 140. Sealing components;

[0057] 150. Connecting structure; 151. Fixing bolt; 152. Connecting nut;

[0058] a. Width of the clamping groove; b. Clamping length of the box body. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0060] Reference Figures 1 to 5 As shown, the housing device 100 provided in this embodiment can be used to install a battery, such that the housing device 100 and the battery are integrated as at least part of a battery pack. It is understood that a battery can refer to a single cell or a battery module composed of multiple cells.

[0061] The housing device 100 includes: a housing 110, a housing cover 120, and a locking element 130.

[0062] The housing 110 has an inner cavity 110a for accommodating the battery. The cover 120 is installed on the housing 110 to close the inner cavity 110a. After the battery is installed in the inner cavity 110a of the housing 110, the cover 120 can be fixed to the housing 110 and the inner cavity 110a can be closed.

[0063] In related technologies, the housing 110 and the cover 120 are fastened together by bolts. A sealing element 140, such as sealant or rubber sealing strip, is provided between the housing 110 and the cover 120. A hole is made in the sealing element 140 for the bolts to pass through. In order to ensure the sealing effect on the inner cavity 110a, a certain number of bolts are required, which makes the assembly operation complicated. Moreover, the local stress concentration of the sealing element 140 near the bolt fastening position makes the sealing element 140 prone to cracking.

[0064] In the housing device 100 provided in this application embodiment, a locking member 130 is connected between the housing 110 and the housing cover 120 to lock the housing 110 and the housing cover 120, that is, the locking member 130 is used to lock the housing 110 and the housing cover 120. The locking member 130 includes: a clamping part 131 and a fixing part 132.

[0065] In this embodiment, at least a portion of the lid 120 is located between the clamping portion 131 and the box body 110, such that the clamping portion 131 and the box body 110 are adapted to clamp the lid 120, and the fixing portion 132 is adapted to be coupled to the box body 110 so that the box body 110 and the lid 120 are fixedly connected by the locking member 130. As a specific example, see... Figure 2 and Figure 3 As shown, a portion of the clamping part 131 is located above the lid 120 in the vertical direction shown in the figure, and a portion of the box body 110 is located below the lid 120. The relative positions of the box body 110 and the clamping part 131 clamp the lid 120. After the locking member 130 is attached to the box body 110, the lid 120 can be locked on the box body 110.

[0066] Alternatively, as another specific example, a slot can be provided in one of the lid 120 and the clamping part 131, and a portion of the other of the lid 120 and the clamping part 131 can be embedded in the slot, that is, the lid 120 and the clamping part 131 can be fitted together, such that at least a portion of the lid 120 is located between the clamping part 131 and the box body 110, thereby achieving the clamping of the lid 120 by the clamping part 131 and the box body 110. This specific example is not shown in the accompanying drawings.

[0067] By adopting the above solution, and by setting a locking member 130, the clamping part 131 and the housing 110 clamp the cover 120, with the locking member 130 fixed to the housing 110. When the cover 120 is subjected to force, the clamping part 131 can restrict the movement of the cover 120 as a whole, and there is no need to use corresponding screw holes on the cover 120 and the housing 110 for fixing. This can reduce or even eliminate the use of fixing bolts 151 between the housing 110 and the cover 120, making assembly and disassembly more convenient. Furthermore, no holes are needed on the sealing member 140 between the housing 110 and the cover 120, and the stress distribution on the cover 120 and the sealing member 140 is more dispersed, ensuring the integrity of the seal and improving the sealing effect. This improves the technical problem of insufficient airtightness of the battery pack.

[0068] Specifically, the clamping part 131 includes: a connecting section 131a, a first clamping section 131b, and a second clamping section 131c.

[0069] The connecting section 131a is located on the outside of the housing 110, and the first clamping section 131b is formed at one end of the connecting section 131a. Figure 2 and Figure 3 In the illustrated specific implementation, the first clamping segment 131b is located on the side of the lid 120 away from the body 110, so that the body 110 and the first clamping segment 131b can clamp and limit the lid 120. The second clamping segment 131c is formed at the end of the connecting segment 131a away from the first clamping segment 131b; the first clamping segment 131b, the connecting segment 131a, and the second clamping segment 131c together form a clamping groove 131d; at least a portion of the body 110 and at least a portion of the lid 120 are located within the clamping groove 131d.

[0070] By forming a clamping groove 131d between the first clamping section 131b, the connecting section 131a, and the second clamping section 131c, a portion of the box body 110 and the box cover 120 are placed in the clamping groove 131d. The box body 110 and the box cover 120 can be properly configured and positioned to ensure the assembly accuracy of the two. At the same time, the clamping part 131 is suitable for clamping the box body 110 and the box cover 120. After the locking member 130 is fixed to the box body 110, the fixed assembly of the box body 110 and the box cover 120 is realized.

[0071] Considering that when the clamping groove 131d simultaneously limits the housing 110 and the lid 120, if the dimensions of the clamping groove 131d are not properly matched with the dimensions of the housing 110 and the lid 120, it may cause the clamping part 131 to have excessively tight contact with the housing 110 or the lid 120. This tight contact will cause the clamping part 131 to deform or prevent the clamping part 131 from applying pressure to the lid 120, thus affecting the sealing performance of the housing device 100. In some embodiments, the groove width a of the clamping groove can be defined as greater than or equal to the clamping length b of the housing.

[0072] Wherein, the groove width 'a' of the clamping groove is defined as the distance between the groove wall of the clamping groove 131d formed by the first clamping section 131b and the groove wall of the clamping groove 131d formed by the second clamping section 131c, and the clamping length 'b' of the box body is defined as the distance between the surface of the portion of the box body 110 located in the clamping groove 131d on the side near the first clamping section 131b and the surface on the side near the second clamping section 131c.

[0073] Reference Figure 3 and Figure 5 As shown, the distance between the groove walls of the clamping groove 131d formed by the first clamping section 131b and the second clamping section 131c in the vertical direction is the groove width a of the clamping groove. (Refer to...) Figure 3 and Figure 4 As shown, the distance between the two end faces of the portion of the housing 110 located in the clamping groove 131d in the vertical direction is the clamping length b of the housing. By limiting the groove width a of the clamping groove to be greater than or equal to the clamping length b of the housing, the clamping part 131 is not blocked by the housing 110 and thus cannot apply pressure to the housing 110. This ensures that the clamping part 131 can provide pressure to the cover 120, thereby stably clamping the cover 120 between the housing 110 and the clamping part 131, reducing the shaking of the cover 120, and ensuring the airtightness of the battery pack with the housing device 100 integrated.

[0074] As a specific structure for positioning and installing the clamping component on the housing 110, the housing 110 also includes a mounting section 111. (Refer to...) Figure 3 and Figure 4 As shown, the mounting portion 111 protrudes from the end of the housing 110 near the cover 120, forming an assembly groove 111a on the periphery of the end of the housing 110 near the cover 120. The locking member 130 is attached to the housing 110 at the mounting portion 111, and at least a portion of the locking member 130 is located within the assembly groove 111a. The assembly groove 111a allows for pre-positioning of the locking member 130 before it is fixed to the housing 110 by the fixing portion 132. Simultaneously, the assembly groove 111a also helps limit the dimension of the locking member 130 protruding from the housing 110 in the left-right direction as shown in the figure, thereby controlling the overall dimensions of the housing device 100.

[0075] It is understood that, in order to ensure that the airtightness of the housing device 100 meets the usage requirements, the housing device 100 may further include a sealing element 140. This sealing element 140 is disposed between the housing body 110 and the cover 120 to seal any gaps between the housing body 110 and the cover 120 that may exist due to manufacturing precision, assembly precision, or other reasons, thereby ensuring that the housing device 100 has sufficient airtightness. The sealing element 140 may be, for example, sealant, a rubber sealing strip, etc., and this application does not impose specific limitations on it.

[0076] In a specific embodiment, at least a portion of the seal 140 may be disposed within the clamping groove 131d, so that when the first clamping section 131b and the second clamping section 131c clamp the cover 120, pressure is applied to the seal 140, so that the seal 140 is in close contact with the box body 110 and the cover 120.

[0077] A corresponding structure can be provided on the housing 110 to limit the position of the lid 120 and / or the seal 140, thereby further positioning and installing the lid 120 and the seal 140 onto the housing 110. Specifically, the housing 110 is provided with a limiting part 112. The limiting part 112 protrudes from the end face of the housing 110 near the lid 120. The limiting part 112 is located around the lid 120 and the seal 140, and its placement restricts the lid 120 and the seal 140 within its inner periphery. During assembly, the lid 120 and the seal 140 are positioned, ensuring a relatively stable position of the seal 140 between the housing 110 and the lid 120, thus guaranteeing that the seal 140 can provide a proper sealing effect.

[0078] In a more specific embodiment, the limiting part 112 may protrude from the surface of the aforementioned mounting part 111.

[0079] As an example of a specific method for attaching the fixing part 132 to the housing 110, the housing device 100 further includes a connecting structure 150. The connecting structure 150 connects the fixing part 132 and the housing 110 so that the fixing part 132 is attached to the housing 110 via the connecting structure 150. That is, the locking member 130 is attached to the housing 110 via a component connected between the fixing part 132 and the housing 110.

[0080] The connecting structure 150 can be implemented by means of a locating pin that interferes with the housing 110 and the locking member 130, or by a snap fastener installed between the housing 110 and the locking member 130, to achieve a fixed connection between the locking member 130 and the housing 110. The number of connecting structures 150 can be flexibly set according to usage requirements to achieve a fixed connection between the locking member 130 and the housing 110. The structures on the fixing part 132 that cooperate with the connecting structure 150 only need to be set in the corresponding number, and the impact on the structural strength of the locking member 130 itself is relatively small.

[0081] As a specific solution, the fixing part 132 is provided with a through hole 132a. The connecting structure 150 includes a fixing bolt 151. The fixing bolt 151 is at least partially inserted into the through hole 132a and is fixedly connected to the housing 110. That is, the fixing bolt 151 passing through the through hole 132a is used to fix the locking member 130 to the housing 110.

[0082] As an optional solution, a threaded hole can be formed on the housing 110 to form a threaded connection with the fixing bolt 151, so as to fix the locking member 130 to the housing 110 using the fixing bolt 151.

[0083] In another alternative embodiment, the connection structure 150 includes a connecting nut 152. The connecting nut 152 is connected to the housing 110; wherein a fixing bolt 151 is threadedly connected to the connecting nut 152 so that the fixing bolt 151 is secured to the housing 110 by the connecting nut 152.

[0084] By providing a connecting nut 152 on the housing 110, the fixing bolt 151 and the connecting nut 152 form a threaded connection, thereby securing the locking member 130 to the housing 110. This arrangement eliminates the need for threaded holes in the housing 110. If the threads of the connecting nut 152 and the fixing bolt 151 are damaged due to maintenance or disassembly during assembly, the connection stability between the locking member 130 and the housing 110 can be ensured by replacing them with new ones.

[0085] In some embodiments, the housing 110 is provided with a stepped groove 110b. The stepped groove 110b is formed on the outer side wall of the housing 110; wherein, a connecting nut 152 is embedded in the stepped groove 110b to limit the connection nut 152 to be installed in the housing 110. (Refer to...) Figure 3 and Figure 4 As shown, the stepped groove 110b has a T-shaped cross-section, and the connecting nut 152 is embedded in the stepped groove 110b to limit the position of the connecting nut 152. This arrangement, where the connecting nut 152 is prevented from detaching from the housing 110 by the groove wall of the stepped groove 110b after the fixing bolt 151 is screwed into it, achieves the fixation of the locking member 130 to the housing 110.

[0086] It is understandable that before the fixing bolt 151 is screwed into the connecting nut 152, the connecting nut 152 can be slidably set in the stepped groove 110b. In some application scenarios, a corresponding number of connecting nuts 152 can be set in the stepped groove 110b, and the corresponding connecting nuts 152 can be combined with the fixing bolt 151 at a specific position in the stepped groove 110b. This allows the number of parts that enable the housing 110 to be combined with the locking member 130 to be controlled according to the application requirements, so that the connection strength between the locking member 130 and the housing 110 meets the requirements.

[0087] In a specific design, the wall of the stepped groove 110b is spaced apart from the end face of the housing 110 near the cover 120, so that the cover 120 is located outside the stepped groove 110b. This ensures that the engagement position of the locking member 130 with the housing 110 is offset from the position of the cover 120 on the housing 110, guaranteeing that the housing 110 has sufficient structural strength at the engagement point with the cover 120. This prevents the housing 110 from deforming and affecting the airtightness of the housing device 100 when pressure changes occur in the inner cavity 110a. At least a portion of the clamping part 131 is embedded in the stepped groove 110b. In a more specific design, the aforementioned second clamping section 131c can be embedded in the stepped groove 110b, limiting the overall size of the locking member 130 and the housing 110, thereby restricting the overall size of the housing device 100.

[0088] In some embodiments, refer to Figure 2 and Figure 4 As shown, the housing 110 is also provided with a lifting slot 110c. The lifting slot 110c is formed at the end of the housing 110 away from the cover 120. The lifting slot 110c can be used to connect with other external components to facilitate the integrated installation of the housing device 100 onto vehicles, energy storage devices, and other equipment by means of lifting.

[0089] Embodiments of this application also provide a battery pack, including the housing device 100 described above.

[0090] The battery pack in this embodiment uses the housing device 100 described above, and therefore has all the beneficial effects of the housing device 100 described above.

[0091] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A housing device for mounting a battery, characterized in that, include: The housing has an internal cavity for accommodating the battery; A lid is installed onto the box body to seal the inner cavity; A locking element is connected between the box body and the box lid to lock the box body and the box lid; The locking element includes: A clamping part, at least a portion of the box cover is located between the clamping part and the box body, so that the clamping part and the box body are adapted to clamp the box cover; A fixing part is adapted to be attached to the housing so that the housing and the lid are fixedly connected by the locking member.

2. The housing device according to claim 1, characterized in that, The clamping part includes: The connecting section is located on the outside of the housing; A first clamping segment is formed at one end of the connecting segment; The second clamping segment is formed at the end of the connecting segment away from the first clamping segment; The first clamping section, the connecting section, and the second clamping section together form a clamping groove; at least a portion of the box body and at least a portion of the box cover are located within the clamping groove.

3. The housing device according to claim 2, characterized in that, The distance between the groove wall of the first clamping section forming the clamping groove and the groove wall of the second clamping section forming the clamping groove is defined as the groove width of the clamping groove, and the distance between the surface of the box body located in the clamping groove on the side near the first clamping section and the surface on the side near the second clamping section is defined as the clamping length of the box body; Wherein, the width of the clamping groove is greater than or equal to the clamping length of the box body.

4. The housing device according to claim 1, characterized in that, The enclosure is also equipped with: The mounting part protrudes from one end of the box body near the box cover to form an assembly groove on the periphery of the end of the box body near the box cover. The locking member is attached to the housing at the mounting portion, and at least a portion of the locking member is located within the mounting groove.

5. The housing device according to claim 1, characterized in that, The housing device further includes: A sealing element is disposed between the housing and the lid.

6. The housing device according to claim 5, characterized in that, The housing is equipped with: A limiting part protrudes from the end face of the box body near the box cover; The limiting part is located around the box cover and the sealing element.

7. The housing device according to any one of claims 1 to 6, characterized in that, The housing device further includes: A connecting structure is provided between the fixing part and the housing, so that the fixing part is connected to the housing through the connecting structure.

8. The housing device according to claim 7, characterized in that, The fixing part is provided with a through hole; The connection structure includes: A fixing bolt, at least partially inserted into the through hole, is fixedly connected to the housing.

9. The housing device according to claim 8, characterized in that, The connection structure includes: Connecting nuts are used to connect to the housing; The fixing bolt is threaded to the connecting nut so that the fixing bolt is fixed to the housing through the connecting nut.

10. The housing device according to claim 9, characterized in that, The housing is equipped with: Stepped grooves are formed on the outer wall of the housing; The connecting nut is embedded in the stepped groove to limit its installation into the housing.

11. The housing device according to claim 10, characterized in that, The wall of the stepped groove is spaced apart from the end face of the box body near the box cover, so that the box cover is located outside the stepped groove; at least part of the clamping part is embedded in the stepped groove.

12. A battery pack, characterized in that, Includes the housing device as described in any one of claims 1-11.

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