Box body, battery pack and electric equipment

Abstract

The utility model provides a box body, battery pack and electric equipment, the box body comprises a bearing part, a cover body and a reinforcer, the cover body comprises a cover body and a first side frame, the cover body is opposite to the bearing part along a first direction and is arranged at an interval with the bearing part, and two ends of the first side frame are respectively connected with the bearing part and the cover body; the first side frame, the cover body and the bearing part jointly define a first accommodating cavity, and the first accommodating cavity is used for mounting a battery module; the two ends of the reinforcing part are connected with the bearing part and the cover body respectively, and the reinforcing part is used for supporting the first side frame, so that the first side frame, the cover body, the bearing part and the reinforcing part jointly form a firm frame, the box body can resist expansion force possibly generated in the charging and discharging process of the battery cell, deformation of the box body is prevented, and the service life of the box body is prolonged. And moreover, the damage or deformation caused by excessive expansion of the battery cells can be inhibited, the overall mode of the battery pack with the box body is improved, and the stability and the safety of the battery module in the long-term use process are ensured.

Description

Technical Field

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

[0002] The battery pack housing, as the main structural component, provides space for the internal components and serves as the mounting carrier for all parts. It functions to house, separate, support, and mechanically protect the internal components. Typically, the housing consists of a shell and a cover, with the cover fixed to the shell. However, due to the expansion forces that may be generated by the battery cells during charging and discharging, in related technologies, the shell's insufficient strength makes it unable to effectively resist these expansion forces, causing the housing to easily deform. Utility Model Content

[0003] The present invention provides a housing, a battery pack, and an electrical device, which aims to solve the problem that in the related art, due to the expansion force that may be generated by the battery cell during charging and discharging, the housing is not strong enough to effectively resist the expansion force of the battery cell, making the housing easy to deform.

[0004] In one aspect, embodiments of this utility model provide a housing.

[0005] In one embodiment, the housing includes:

[0006] Load-bearing part;

[0007] The cover includes a cover body and a first side frame. The cover body is arranged opposite to and spaced apart from the support part along a first direction. The two ends of the first side frame are respectively connected to the support part and the cover body, so that the first side frame, the cover body and the support part together form a first cavity, which is used for battery module installation.

[0008] A reinforcing member, the two ends of which are connected to the supporting part and the cover respectively, is used to support the first side frame.

[0009] In one embodiment, the first side frame is provided with through holes spaced apart along its circumference, and the through holes are provided through the first side frame along the first direction;

[0010] The reinforcing member is provided corresponding to the through hole, and a portion of the reinforcing member is inserted into the through hole.

[0011] In one embodiment, one of the cover and the supporting part is provided with a mounting hole, and the mounting hole is provided corresponding to the through hole;

[0012] The other of the cover and the supporting part is provided with a first threaded hole, which is provided in correspondence with the through hole;

[0013] The reinforcing member includes a first threaded member, the threaded end of which is adapted to pass through the mounting hole, and the through hole is threadedly connected to the first threaded hole.

[0014] In one embodiment, multiple covers are provided, and the multiple covers are arranged at intervals on the support portion.

[0015] In one embodiment, multiple reinforcing members are provided, and the multiple reinforcing members are arranged at intervals along the circumference of the first side frame.

[0016] In one embodiment, the first side frame includes two expansion beams disposed opposite to each other;

[0017] Multiple reinforcing members are disposed on the two expansion beams.

[0018] In one embodiment, it further includes a enclosure portion, the enclosure portion comprising:

[0019] A base plate is provided on the side of the supporting part away from the first side frame, and the base plate is opposite to the supporting part and spaced apart;

[0020] The second side frame has its two ends connected to the supporting part and the bottom plate, respectively, so that the second side frame, the bottom plate and the supporting part together form a second cavity, which is used for the installation of the battery module.

[0021] In one embodiment, the reinforcing member is adapted to be connected to the second side frame.

[0022] Secondly, embodiments of this utility model provide a battery pack.

[0023] In one embodiment, the battery pack includes:

[0024] The enclosure as described above;

[0025] A battery module, wherein the battery module is installed in the first cavity.

[0026] In one embodiment, the support portion includes a first liquid cooling plate, which is thermally connected to the bottom of the battery module; and / or,

[0027] The cover includes a second liquid cooling plate, which is thermally connected to the top of the battery module.

[0028] Thirdly, embodiments of this utility model provide an electrical device.

[0029] In one embodiment, the electrical device includes a battery pack as described above.

[0030] The beneficial effects of the embodiments of this utility model are as follows:

[0031] In this embodiment of the invention, the first cavity formed by the first side frame, the cover, and the supporting part provides mechanical protection for the battery module. Furthermore, both ends of the reinforcing member are connected to the supporting part and the cover, respectively, ensuring a secure connection between the reinforcing member and these components. The reinforcing member supports the first side frame, thus not only enhancing the overall strength of the housing but also providing direct and effective support for the first side frame. This design allows the first side frame, the cover, the supporting part, and the reinforcing member to form a robust frame, helping the housing resist the expansion forces that may be generated during charging and discharging of the battery cells, preventing housing deformation, and suppressing excessive expansion of the battery cells that could cause damage or deformation. This improves the overall modality of the battery pack with this housing, ensuring the stability and safety of the battery module during long-term use. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a structural schematic diagram of the box provided in an embodiment of the present utility model;

[0034] Figure 2 yes Figure 1 A cross-sectional view of the box shown;

[0035] Figure 3 yes Figure 2 A magnified view of part A shown below;

[0036] Figure 4 This is a cross-sectional schematic diagram of a battery pack (partial structure) provided in an embodiment of the present invention;

[0037] Figure 5 yes Figure 4 A magnified view of part B shown;

[0038] Figure 6 This is a schematic diagram of the structure of the enclosure provided in an embodiment of the present utility model;

[0039] Figure 7 yes Figure 6 A magnified view of part C shown;

[0040] Figure 8 yes Figure 6 A cross-sectional schematic diagram of the enclosure shown;

[0041] Figure 9 yes Figure 8 A magnified view of part D is shown below;

[0042] Figure 10 This is a schematic diagram of the structure of the reinforcement provided in an embodiment of this utility model;

[0043] Figure 11 This is a schematic diagram of the longitudinal beam provided in an embodiment of this utility model.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1000, Battery pack; 100, Housing; 101, First cavity; 10, Supporting part; 20, Cover; 21, Cover; 22, First side frame; 221, Through hole; 222, Expansion beam; 30, Reinforcing member; 41, Mounting hole; 42, First threaded hole; 50, Enclosure part; 51, Base plate; 52, Second side frame; 521, Side beam; 522, Longitudinal beam; 5221, Second side wall; 5222, Insertion hole; 52221, Dividing hole ; 523, Reinforcing component; 5231, Connector; 52311, Welding hole; 5232, Insertion part; 52321, First sidewall; 52322, Groove; 52323, Protrusion; 524, Connector; 5241, Third screw connector; 525, Second screw connector; 5261, First through hole; 5262, Second through hole; 5271, Second threaded hole; 5272, Third threaded hole; 53, Second cavity; 200, Battery module. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, 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.

[0047] The battery pack casing, as the main structural component, provides space for the internal components and serves as the mounting carrier for all parts. It functions to house, separate, support, and mechanically protect the internal components. Typically, the casing consists of a shell and a cover, with the cover fixed to the shell. However, due to the expansion forces that may be generated by the battery cells during charging and discharging, in related technologies, the shell's insufficient strength makes it unable to effectively resist these expansion forces, causing the casing to easily deform.

[0048] In view of this, the present invention proposes a box body. Figures 1 to 3 This is a structural schematic diagram of an embodiment of the housing provided by this utility model. The housing provided by this utility model has greatly improved resistance to the expansion force of the battery cells. The housing will be described in detail below with reference to the main accompanying drawings.

[0049] Reference Figures 1 to 3 The housing 100 includes a support portion 10, a cover 20, and a reinforcing member 30. The cover 20 includes a cap 21 and a first side frame 22. The cap 21 is arranged opposite to and spaced apart from the support portion 10 along a first direction. The two ends of the first side frame 22 are respectively connected to the support portion 10 and the cap 21, so that the first side frame 22, the cap 21, and the support portion 10 together form a first cavity 101. The first cavity 101 is used for mounting the battery module 200 (see reference). Figure 4 The two ends of the reinforcing member 30 are connected to the bearing part 10 and the cover 21 respectively, and the reinforcing member 30 is used to support the first side frame 22.

[0050] In this embodiment of the invention, the first cavity 101 formed by the first side frame 22, the cover 21, and the supporting part 10 provides mechanical protection for the battery module 200. Furthermore, the two ends of the reinforcing member 30 are connected to the supporting part 10 and the cover 21 respectively, ensuring a secure connection between the reinforcing member 30 and the supporting part 10 and the cover 21. The reinforcing member 30 supports the first side frame 22, thus not only enhancing the overall strength of the housing but also directly and effectively supporting the first side frame 22. This design allows the first side frame 22, the cover 21, the supporting part 10, and the reinforcing member 30 to form a robust frame, helping the housing 100 resist the expansion force that may be generated during the charging and discharging process of the battery cells, preventing deformation of the housing 100, and suppressing excessive expansion of the battery cells that could cause damage or deformation. This improves the overall mode of the battery pack with this housing, ensuring the stability and safety of the battery module during long-term use.

[0051] Reference Figures 2 to 5In one embodiment, the first side frame 22 is provided with a through hole 221, which extends through the first side frame 22 along a first direction. A reinforcing member 30 is correspondingly provided with the through hole 221, and a portion of the reinforcing member 30 is inserted into the through hole 221. This increases the contact area between the reinforcing member 30 and the first side frame 22, making the connection between them tighter and more secure, thereby improving the strength and stability of the connection. The design of partially inserting the reinforcing member 30 into the through hole 221 helps to improve the structural rigidity of the entire housing 100, allowing the first side frame 22 to better resist deformation under external forces and better resist the expansion force generated by the battery cells during charging and discharging, preventing deformation of the housing 100 and suppressing excessive expansion of the battery cells that could cause damage or deformation. This ensures the safety and stability of the battery module 200 installed within the housing 100.

[0052] Reference Figure 2 and Figure 3 In one embodiment, one of the cover 21 and the supporting part 10 is provided with a mounting hole 41, which corresponds to the through hole 221. The other of the cover 21 and the supporting part 10 is provided with a first threaded hole 42, which corresponds to the through hole 221. The reinforcing member 30 includes a first threaded connector, the threaded end of which is adapted to pass through the mounting hole 41, the through hole 221, and the first threaded hole 42 for threaded connection. In this way, the reinforcing member 30 is tightly connected to the cover 21 and the supporting part 10 through the first threaded connector, forming a strong mechanical connection. This connection method has higher connection strength and reliability than other non-threaded connection methods (such as welding, riveting, etc.), and can withstand greater external forces and vibration impacts. The threaded connection of the first threaded connector not only enhances the strength of the connection point, but also improves the structural rigidity of the entire housing 100. This rigid structure helps to resist the pressure generated when the battery cell expands, preventing the housing 100 from deforming or breaking. The threaded connection makes the installation and removal of the reinforcement 30 relatively simple and convenient. When the battery module 200 needs to be repaired or replaced, the reinforcement 30 can be easily removed without damaging other parts of the housing 100.

[0053] It should be noted that the connection method between the two ends of the reinforcing member 30 and the supporting part 10 and the cover 21 can be selected as needed. For example, in one embodiment, the two ends of the reinforcing member 30 can be welded to the supporting part 10 and the cover 21. In another embodiment, the two ends of the reinforcing member 30 can also be glued to the supporting part 10 and the cover 21. Specifically, this application does not limit the connection method between the two ends of the reinforcing member 30 and the supporting part 10 and the cover 21.

[0054] Reference Figure 2In one embodiment, multiple covers 20 are provided, spaced apart from each other on the support portion 10. This allows multiple first cavities 101 to be formed between the multiple covers 20 and the support portion 10, and multiple battery modules 200 can be installed in the multiple first cavities 101, thereby enabling the housing 100 to accommodate more battery modules 200. A certain gap can be formed between adjacent covers 20, and these gaps can serve as heat dissipation channels to promote heat dissipation from the battery modules 200 installed in the first cavities 101.

[0055] Reference Figure 2 In one embodiment, multiple reinforcing members 30 are provided, and the multiple reinforcing members 30 are arranged at intervals along the circumference of the first side frame 22. In this way, the multiple reinforcing members 30 arranged at intervals along the circumference of the first side frame 22 can effectively distribute the stress and pressure acting on the first side frame 22. This distribution method allows each reinforcing member 30 to bear a part of the load, thereby improving the strength and load-bearing capacity of the entire structure. The spaced arrangement of multiple reinforcing members 30 enhances the rigidity of the first side frame 22, making it more resistant to deformation and bending, and making the entire housing 100 structure more resistant to the expansion force of the battery cells. This helps to suppress the damage or deformation of the battery cells due to expansion, thereby ensuring the safety and stability of the battery module 200 installed in the housing 100.

[0056] Reference Figure 3 and Figure 5 In one embodiment, the first side frame 22 includes two expansion beams 222 arranged opposite to each other, and a plurality of reinforcing members 30 are disposed on the two expansion beams 222. Thus, the battery cell will generate an expansion force during charging and discharging, and the expansion force will act on the expansion beams. By combining the two oppositely arranged expansion beams 222 and the plurality of reinforcing members, the structural rigidity of the expansion beams is enhanced, making them more resistant to deformation caused by the expansion of the battery cell.

[0057] It should be noted that the arrangement of the multiple reinforcing members 30 on the two expansion beams 222 can be selected as needed. For example, in one embodiment, at least a portion of the multiple reinforcing members 30 is located outside the first cavity 101 and abuts against the opposite side of the two longitudinal beams. In another embodiment, at least a portion of the multiple reinforcing members 30 is located inside the first cavity 101 and abuts against the adjacent side of the two longitudinal beams. In yet another embodiment, a portion of the multiple reinforcing members 30 is located inside the first cavity 101 and abuts against the adjacent side of the two longitudinal beams, while a portion of the multiple reinforcing members 30 is located outside the first cavity 101 and abuts against the opposite side of the two longitudinal beams. In the embodiments of this application, the multiple reinforcing members 30 penetrate the two expansion beams 222 and are respectively fixedly connected to the bearing portion 10 and the cover 21. Of course, in other embodiments, the multiple reinforcing members 30 may be partially disposed through the two expansion beams 222, partially located inside the first cavity 101 and abutting against the expansion beams 222, and partially located outside the first cavity 101 and abutting against the expansion beams 222. Specifically, this application does not limit the manner in which the multiple reinforcing members 30 are disposed on the two expansion beams 222.

[0058] Reference Figure 2 and Figure 4 In one embodiment, the housing 100 further includes a enclosure portion 50, which includes a bottom plate 51 and a second side frame 52. The bottom plate 51 is located on the side of the support portion 10 away from the first side frame 22. The bottom plate 51 is opposite to the support portion 10 and spaced apart. The two ends of the second side frame 52 are respectively connected to the support portion 10 and the bottom plate 51, so that the second side frame 52, the bottom plate 51 and the support portion 10 together enclose a second cavity 53. The second cavity 53 is used for installing the battery module 200. Thus, the housing 100 has a first cavity 101 and a second cavity 53 spaced apart along a first direction. The battery module 200 is installed in both the first cavity 101 and the second cavity 53, thereby increasing the battery pack 1000 with the housing 100.

[0059] Reference Figure 2In one embodiment, the reinforcing member 30 is adapted to be connected to the second side frame 52. This connection significantly enhances the structural strength of the housing 100. During charging and discharging, the battery cells generate expansion forces. The presence of the reinforcing member 30 disperses and resists these expansion forces, preventing the housing 100 from deforming or cracking due to cell expansion. By connecting the reinforcing member 30 to the second side frame 52, the stress inside the housing 100 can be distributed more rationally. This design helps reduce the concentration of local stress, making the housing 100 more stable when subjected to cell expansion forces. Under long-term exposure to cell expansion forces, the housing 100 can maintain its original shape and performance, extending its service life. The modal frequency of the battery pack 1000 is an important indicator of its structural dynamic characteristics. The connection between the reinforcing member 30 and the second side frame 52 helps to increase the modal frequency of the battery pack 1000, making it more resistant to vibrations and impacts caused by external excitations.

[0060] Reference Figure 6 and Figure 8 The second side frame 52 includes two side beams 521, multiple longitudinal beams 522, and multiple reinforcing members 523. The two side beams 521 are arranged opposite each other and spaced apart along the second direction. Each side beam 521 extends along the third direction. The second direction, the third direction, and the first direction are arranged perpendicularly to each other. The multiple longitudinal beams 522 are arranged spaced apart along the third direction. Each longitudinal beam 522 extends along the second direction. This cross arrangement allows the second side frame 52 to form a stable support structure in both directions, effectively improving the overall stability of the second side frame 52. Multiple reinforcing members 523 are disposed at the ends of multiple longitudinal beams 522. Each reinforcing member 523 includes a connecting seat 5231 and a plug-in portion 5232 protruding from the connecting seat 5231. The connecting seat 5231 is fixedly connected to the side beam 521, and the plug-in portion 5232 is plugged into the end of the corresponding longitudinal beam 522. The plug-in portion 5232 has two first sidewalls 52321 disposed opposite to each other in a third direction. The two first sidewalls 52321 are fixedly connected to the corresponding longitudinal beam 522 through multiple connectors 524. The reinforcing members 523 are disposed at the ends of the longitudinal beams 522 and are fixedly connected to the side beams 521 through the connecting seats 5231, thereby fixing the position of the connecting seats 5231. The insertion part 5232 is inserted into the longitudinal beam 522. This connection method not only simplifies the assembly process, but also increases the contact area between the insertion part 5232 and the longitudinal beam 522, thereby increasing the connection strength between the longitudinal beam 522 and the side beam 521 and further improving the overall stability of the second side frame 52.

[0061] Furthermore, since the connecting seat 5231 is fixedly connected to the side beam 521, and the insertion part 5232 is inserted into the longitudinal beam 522 and fixed with multiple connecting pieces 524, this design enables the reinforcement 523 to effectively transmit and disperse external forces, enhancing the bending and torsional resistance of the second side frame 52. The insertion part 5232 of the reinforcement 523 has two first side walls 52321 arranged opposite to each other along a third direction. The two first side walls 52321 are fixedly connected to the corresponding longitudinal beam 522 through multiple connecting pieces 524. In this way, the insertion part 5232 is fixedly connected to the longitudinal beam 522, preventing the insertion part 5232 from separating from the longitudinal beam 522 and improving the connection strength of the overall structure of the second side frame 52. In addition, the two first sidewalls 52321 are arranged opposite to each other along the third direction, which provides a large operating space when the plug part 5232 is fixedly connected to the corresponding longitudinal beam 522 through the connector 524, making the connection and fixing operation of the plug part 5232 and the longitudinal beam simple.

[0062] Reference Figure 7 and Figure 9 In one embodiment, the connecting seat 5231 is screwed to the first side beam 521 via multiple second screw fasteners 525. This screw-fastening method can withstand significant tensile and shear forces, ensuring the strength and stability of the connection between the connecting seat 5231 and the first side beam 521. The screw-fastening has a self-locking function, effectively preventing loosening between the connecting seat 5231 and the first side beam 521 due to vibration or external forces. The screw-fastening method is relatively simple and allows for quick connection between the connecting seat 5231 and the first side beam 521, improving installation efficiency. The screw-fastening method also allows for disassembly and reassembly of the connecting seat 5231 and the first side beam 521 as needed.

[0063] It should be noted that the connection method between the connecting seat 5231 and the first side beam 521 can be selected as needed. For example, in one embodiment, the connecting seat 5231 and the first side beam 521 can also be fixed by screws and welding. This improves the stability of the connecting seat 5231 and the first side beam 521. In another embodiment, the connecting seat 5231 and the first side beam 521 can also be fixed by welding or connected by a pin. In other embodiments, the connecting seat 5231 and the first side beam 521 can also be fixed by welding and connected by a pin. Specifically, this application does not limit this.

[0064] Reference Figure 7 and Figure 9In one embodiment, the plurality of connectors 524 include a plurality of third screw connectors 5241, each third screw connector 5241 fixingly connecting the first sidewall 52321 to the corresponding first longitudinal beam 522. This screw-connection method can withstand greater tensile and shear forces, ensuring the strength and stability of the connection between the insertion part 5232 and the first longitudinal beam 522. The screw-connection has a self-locking function, effectively preventing loosening between the insertion part 5232 and the first longitudinal beam 522 due to vibration or external forces. The screw-connection method is relatively simple and can quickly achieve the connection between the insertion part 5232 and the first longitudinal beam 522, improving installation efficiency. The screw-connection method also allows for disassembly of the insertion part 5232 and the first longitudinal beam 522 as needed.

[0065] It should be noted that the connection method between the plug-in portion 5232 and the first longitudinal beam 522 can be selected as needed. For example, in one embodiment, the plug-in portion 5232 and the first longitudinal beam 522 can also be fixed by screws or welding. This improves the stability of the plug-in portion 5232 and the first longitudinal beam 522. In another embodiment, the plug-in portion 5232 and the first longitudinal beam 522 can also be fixed by welding or connected by a pin. In other embodiments, the plug-in portion 5232 and the first longitudinal beam 522 can also be fixed by welding and connected by a pin. Specifically, this application does not limit this.

[0066] Reference Figure 9 and Figure 11 In one embodiment, the first longitudinal beam 522 has two second sidewalls 5221 arranged opposite each other along a third direction. Each second sidewall 5221 has multiple first through holes 5261 extending along a third direction, and each first sidewall 52321 has multiple second threaded holes 5271 extending along a third direction. The multiple second threaded holes 5271 correspond one-to-one with the multiple first through holes 5261. The threaded ends of multiple third screw connectors 5241 pass through the multiple first through holes 5261 and are threadedly connected to the corresponding multiple second threaded holes 5271. Thus, the screw-fit fixing method can withstand greater tensile and shear forces, ensuring the strength and stability of the connection between the plug-in part 5232 and the first longitudinal beam 522. The screw-fit fixing has a self-locking function, which can effectively prevent the plug-in part 5232 and the first longitudinal beam 522 from loosening due to vibration or external force. The screw-fit fixing method is relatively simple and can quickly realize the connection between the plug-in part 5232 and the first longitudinal beam 522, improving installation efficiency. The screw-on fixing method allows the insertion part 5232 and the first longitudinal beam 522 to be disassembled as needed.

[0067] Reference Figure 9In one embodiment, the diameter of the first through hole 5261 decreases at least partially along the direction from the second side wall 5221 to the first side wall 52321. The third screw connector 5241 includes a first tapered countersunk bolt. The threaded end of the first tapered countersunk bolt is adapted to be threaded into the second threaded hole 5271, and the head of the first tapered countersunk bolt is adapted to be recessed into the first through hole 5261. Thus, the head of the first tapered countersunk bolt is designed to be tapered, which can fit into the first through hole 5261 with decreasing diameter. When the bolt is installed in place, the head of the first tapered countersunk bolt can be recessed into the hole and will not protrude from the surface of the second side wall 5221, thereby achieving an aesthetically pleasing assembly effect. Since the head of the first tapered countersunk bolt does not protrude from the surface of the second side wall 5221, safety hazards such as scratches and collisions caused by the bolt head during use can be avoided. The countersunk design allows the head of the first tapered countersunk bolt to form a tighter contact with the second sidewall 5221, which helps to enhance the stability of the connection and prevent the first tapered countersunk bolt from loosening due to vibration or external force. The compatibility between the head of the first tapered countersunk bolt and the first through hole 5261 makes it easier to align the first tapered countersunk bolt with the threaded hole during installation, improving installation efficiency. Because the head of the first tapered countersunk bolt can be recessed into the first through hole 5261, the utilization rate of the space enclosed by the second side frame 52 is improved.

[0068] Reference Figure 9 In one embodiment, the end of the plug portion 5232 away from the connector 5231 is provided with a groove 52322, which communicates with a plurality of second threaded holes 5271. Thus, due to the presence of the groove 52322, the installer can more easily pass the third screw 5241 through the corresponding second threaded hole 5271 and quickly complete the tightening operation, thereby improving installation efficiency. The design of the groove 52322 helps reduce stress concentration in the plug portion 5232 during the connection process. When the third screw 5241 is tightened, the groove 52322 can disperse some of the stress, thereby reducing the risk of cracking or damage to the plug portion 5232. The presence of the groove 52322 can reduce the weight of the fastener.

[0069] Reference Figure 9 and Figure 10In one embodiment, the connecting seat 5231 is provided with a plurality of second through holes 5262 along a second direction. The plurality of second through holes 5262 are located on both sides of the insertion portion 5232 along a third direction. Each first side beam 521 is provided with a plurality of third threaded holes 5272 corresponding to the plurality of second through holes 5262. The threaded ends of a plurality of second threaded members 525 pass through the plurality of second through holes 5262 and are threadedly connected to the corresponding plurality of third threaded holes 5272. Thus, the threaded fixing method can withstand greater tensile and shear forces, ensuring the strength and stability of the connection between the connecting seat 5231 and the first side beam 521. The threaded fixing has a self-locking function, effectively preventing loosening between the connecting seat 5231 and the first side beam 521 due to vibration or external forces. The threaded fixing method is relatively simple and can quickly achieve the connection between the connecting seat 5231 and the first side beam 521, improving installation efficiency. The threaded fixing method allows the connecting seat 5231 and the first side beam 521 to be disassembled as needed.

[0070] Reference Figure 9 In one embodiment, the diameter of the second through hole 5262 decreases at least partially along the direction from the insertion part 5232 to the connecting seat 5231. The third screw connector 5241 includes a second tapered countersunk bolt. The threaded end of the second tapered countersunk bolt is adapted to be threaded into the third threaded hole 5272. The head of the first tapered countersunk bolt is adapted to be recessed into the second through hole 5262. Thus, the head of the second tapered countersunk bolt is designed to be tapered, which can fit into the second through hole 5262 with decreasing diameter. When the second tapered countersunk bolt is installed in place, its head can be recessed into the hole and will not protrude from the surface of the connecting seat 5231, thereby achieving an aesthetically pleasing assembly effect. Since the head of the second tapered countersunk bolt does not protrude from the surface of the connecting seat 5231, safety hazards such as scratches and collisions caused by the head of the second tapered countersunk bolt during use can be avoided. Because the head of the second tapered countersunk bolt matches the decreasing diameter design of the second through hole 5262, when the second tapered countersunk bolt is tightened, its head fits more tightly against the inner wall of the second through hole 5262, thereby enhancing the stability and reliability of the connection between the first side beam 521 and the connecting seat 5231. The tapered head design of the second tapered countersunk bolt helps to disperse stress during the connection process, reducing the risk of cracking or damage to the connection due to stress concentration. The compatibility between the head of the second tapered countersunk bolt and the second through hole 5262 makes it easier to align the second tapered countersunk bolt with the third threaded hole 5272 during installation, improving installation efficiency. Since the head of the second tapered countersunk bolt can be recessed into the second through hole 5262, the utilization rate of the space enclosed by the second side frame 52 is improved.

[0071] Reference Figure 10In one embodiment, the connecting seat 5231 is further provided with a plurality of welding holes 52311 along the second direction. The plurality of welding holes 52311 are distributed on both sides of the insertion portion 5232 along the third direction. The plurality of welding holes 52311 are adjacent to the periphery of the first side beam 521 for welding and fixing with the first side beam 521. In this way, the connection strength between the connecting seat 5231 and the first side beam 521 is improved, so that the frame edge can withstand greater loads and vibrations. The welding holes 52311 are distributed on both sides of the insertion portion 5232 along the third direction, which helps to disperse the stress during the welding process between the connecting seat 5231 and the first side beam 521 and avoid connection failure caused by stress concentration.

[0072] In one embodiment, the periphery of the connecting seat 5231 is welded to the first side beam 521, thereby improving the connection strength between the connecting seat 5231 and the first side beam 521, enabling the frame edge to withstand larger loads and vibrations. Fixing the periphery of the connecting seat 5231 to the first side beam 521 by welding effectively prevents displacement or deformation of the connecting seat 5231 during use, thus ensuring the stability of the entire structure. The welded connection has good long-term stability, ensuring that the connection between the connecting seat 5231 and the first side beam 521 remains firmly in place.

[0073] It should be noted that the feature of welding the periphery of the welding hole 52311 to the first side beam 521 and the feature of welding the periphery of the connecting seat 5231 to the first side beam 521 can be set separately or simultaneously. When set simultaneously, the connection between the connecting seat 5231 and the first side beam 521 is stable and firm.

[0074] The method of achieving the insertion and mating of the end of the first longitudinal beam 522 and the insertion part 5232 can be selected as needed, referring to... Figure 10In one embodiment, the end of the first longitudinal beam 522 is provided with a plug-in hole 5222, and the plug-in part 5232 is inserted into the plug-in hole 5222. The connecting seat 5231 abuts against the end of the first longitudinal beam 522. The matching design of the plug-in hole 5222 and the plug-in part 5232 makes the connection process between the plug-in part 5232 and the first longitudinal beam 522 simple and quick, thereby improving the connection efficiency. The tight fit between the plug-in hole 5222 and the plug-in part 5232 increases the contact area between the first longitudinal beam 522 and the plug-in part 5232, which can ensure the stability and reliability of the connection between the plug-in hole 5222 and the plug-in part 5232, and prevent structural failure at the connection between the plug-in hole 5222 and the plug-in part 5232. The plug-in connection design helps to disperse the stress at the connection part, avoid structural damage caused by stress concentration, and thus improve the overall structural stability of the second side frame 52. The mating design of the insertion hole 5222 and the insertion part 5232 ensures precise positioning of the connection parts, avoiding deviations or misalignments during the connection process. Precise mating and positioning help improve the assembly quality of the second side frame 52, ensuring the robustness and reliability of the connection parts.

[0075] In other embodiments, the end of the insertion portion 5232 may be provided with an insertion hole 5222, and the first longitudinal beam 522 may be inserted into the insertion hole 5222. In other embodiments, the insertion portion 5232 may be provided with a first insertion hole 5222, the first longitudinal beam 522 may be provided with a second insertion hole 5222, the end of the first longitudinal beam 522 may be inserted into the first insertion hole 5222, and the end of the insertion portion 5232 may be inserted into the second insertion hole 5222. Specifically, this application does not limit this.

[0076] Reference Figure 4 and Figure 5 Secondly, this application provides a battery pack 1000, which includes a housing 100100 and a battery module 200 as described above, with the battery module 200 installed in a first cavity 23101101. The specific structure of the housing 100100 is described in the above embodiments. Since this battery pack 1000 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0077] In one embodiment, the support portion 10 includes a first liquid cooling plate, which is thermally connected to the bottom of the battery module 200. This thermal connection allows the first liquid cooling plate to quickly absorb and remove the large amount of heat generated by the battery module 200 during charging and discharging, significantly reducing the operating temperature of the battery module 200 and minimizing battery aging and performance degradation caused by high temperatures. Compared to traditional air cooling, liquid cooling offers higher heat dissipation efficiency and more uniform heat dissipation.

[0078] It should be noted that there are multiple ways to achieve thermally conductive connection between the first liquid cooling plate and the bottom of the battery module 200. For example, thermally conductive structural adhesive or other materials can be provided between the first liquid cooling plate and the bottom of the battery module 200. Specifically, this application does not limit this.

[0079] In one embodiment, the cover 21 includes a second liquid cooling plate, which is thermally connected to the top of the battery module 200. This thermal connection allows the second liquid cooling plate to quickly absorb heat generated at the top of the battery module 200 and remove it through liquid cooling circulation. This design ensures sufficient heat dissipation at the top of the battery module 200, preventing localized overheating. The thermally connected liquid cooling plate also ensures a more uniform temperature inside the battery module 200, avoiding performance degradation and shortened lifespan caused by uneven temperature distribution.

[0080] It should be noted that there are various ways to thermally connect the second liquid cooling plate to the top of the battery module 200. For example, thermally conductive structural adhesive or other materials can be provided between the second liquid cooling plate and the top of the battery module 200. Specifically, this application does not limit this.

[0081] Thirdly, the embodiments of this utility model also propose an electrical device, including the battery pack 1000 as described above. The specific structure of the battery pack 1000 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0082] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. 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 utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A case characterized by comprising: The battery pack comprises: a bearing part; a cover body comprising a cover and a first side frame, the cover being arranged opposite to and spaced apart from the bearing part along a first direction, and two ends of the first side frame being connected to the bearing part and the cover respectively, so that the first side frame, the cover and the bearing part jointly form a first cavity for installing a battery module; a reinforcing member, two ends of the reinforcing member being connected to the bearing part and the cover respectively, and the reinforcing member being used for supporting the first side frame.

2. The case of claim 1, wherein, The first side frame is provided with a through hole penetrating through the first side frame along the first direction; The reinforcing member is arranged corresponding to the through hole, and a part of the reinforcing member is inserted into the through hole.

3. The case of claim 2, wherein, One of the cover and the bearing part is provided with a mounting hole arranged corresponding to the through hole; The other of the cover and the bearing part is provided with a first threaded hole arranged corresponding to the through hole; The reinforcing member comprises a first threaded member, and a threaded end of the first threaded member is adapted to be threadedly connected corresponding to the mounting hole, the through hole and the first threaded hole.

4. The case of claim 1, wherein, A plurality of cover bodies are arranged spaced apart from each other on the bearing part.

5. The case according to any one of claims 1 to 4, characterized in that A plurality of reinforcing members are arranged spaced apart from each other along the circumference of the first side frame.

6. The case of claim 5, wherein, The first side frame comprises two expansion beams arranged opposite to each other; The plurality of reinforcing members are arranged on the two expansion beams respectively.

7. The case according to any one of claims 1 to 4, characterized in that The battery pack further comprises a surrounding part comprising: a bottom plate arranged on a side of the bearing part away from the first side frame, the bottom plate being arranged opposite to and spaced apart from the bearing part; a second side frame, two ends of the second side frame being connected to the bearing part and the bottom plate respectively, so that the second side frame, the bottom plate and the bearing part jointly form a second cavity for installing a battery module.

8. The case of claim 7, wherein, The reinforcing member is adapted to be connected to the second side frame.

9. A battery pack, characterized by, The battery pack comprises: the box body according to any one of claims 1 to 8; a battery module installed in the first cavity.

10. The battery pack of claim 9, wherein, The bearing part comprises a first liquid cooling plate in thermal contact with a bottom of the battery module; and / or The cover comprises a second liquid cooling plate in thermal contact with a top of the battery module.

11. An electrical device, characterized by The battery pack comprises the battery pack according to claim 9 or 10.

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