Housing assembly, battery pack and energy-storage power supply

Abstract

Disclosed are a housing assembly (100), a battery pack and an energy-storage power supply. The housing assembly (100) comprises a shell (10) and a cover plate (20). An accommodating cavity (40) for accommodating cells (30) is formed inside the shell (10), the shell (10) has a mounting wall (50), a fixing structure for fixing the cells (30) is formed on the side of the mounting wall (50) located in the accommodating cavity (40), through holes (51) are formed at corresponding positions of the fixing structure, and the cells (30) are in communication with the outside of the accommodating cavity (40) by means of the through holes (51). The cover plate (20) covers the side of the mounting wall (50) away from the accommodating cavity (40) so as to isolate the cells (30) from the outside. A groove is formed on the periphery of one of the cover plate (20) and the mounting wall (50), and a projection is formed on the periphery of the other, wherein the projection is inserted into the groove.

Description

Housing assembly, battery pack and energy storage power supply

[0001] Priority information

[0002] The present application claims priority to and the benefit of patent application number 202411125442.9 filed with the China National Intellectual Property Office on August 15, 2024, and patent application number 202421990396.4 filed with the China National Intellectual Property Office on August 15, 2024, and incorporates by reference the entirety of each thereof. TECHNICAL FIELD

[0003] The present application relates to the technical field of energy storage, in particular to a housing assembly, a battery pack and an energy storage power supply. BACKGROUND

[0004] The Cell To Product (CTP) structure omits the traditional battery module link and directly integrates the battery cell to the product housing, which can improve the product energy density while reducing the cost. However, due to the CTP structure, the battery cell is exposed, which poses a safety problem. In order to prevent water from seeping into the product, a sealing structure needs to be provided. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a housing assembly, a battery pack and an energy storage power supply.

[0006] The housing assembly of the present application is used to fix the battery cell. The housing assembly comprises a housing and a cover plate. The housing forms a receiving cavity for receiving the battery cell inside, and the housing has a mounting wall. The mounting wall is located on one side of the receiving cavity and forms a fixing structure for fixing the battery cell. The fixing structure has a through hole formed at a corresponding position. The battery cell communicates with the outside of the receiving cavity through the through hole. The cover plate is arranged on the side of the mounting wall away from the receiving cavity to isolate the battery cell from the outside. The periphery of one of the cover plate and the mounting wall forms a groove, and the periphery of the other forms a protrusion. The protrusion is inserted into the groove.

[0007] In some embodiments, the groove is filled with adhesive.

[0008] In some embodiments, an elastic sealing member is placed in the groove, and the protrusion abuts against the elastic sealing member.

[0009] In some embodiments, the side of the mounting wall away from the receiving cavity forms a mounting groove, the bottom of the mounting groove forms the through hole, the cover plate is arranged in the mounting groove, the periphery of the mounting groove forms the groove, and the periphery of the cover plate forms the protrusion.

[0010] In some embodiments, the mounting wall and the cover plate form a receiving space, the electrode of the battery cell communicates with the receiving space through the through hole, and the receiving space is provided with a busbar electrically connected to the electrode of the battery cell.

[0011] In some embodiments, the battery cell further comprises an explosion-proof valve, the mounting wall and the cover plate form a receiving space, and the explosion-proof valve communicates with the receiving space through the through hole.

[0012] In some embodiments, the receiving space is further provided with a pressure relief channel communicating with the receiving cavity or the outside of the shell.

[0013] In some embodiments, the mounting wall is arranged at the bottom of the shell.

[0014] In some embodiments, the fixing structure is a receiving groove, one end of the battery cell is inserted into the receiving groove, and the bottom of the receiving groove is provided with the through hole.

[0015] In some embodiments, one of the mounting wall or the cover plate is provided with a supporting structure, and the supporting structure abuts against the other one of the mounting wall or the cover plate.

[0016] In some embodiments, the supporting structure is a protruding column, one of the mounting wall or the cover plate is provided with the protruding column, and the other one of the mounting wall or the cover plate is provided with a glue dispensing groove filled with adhesive, and the protruding column is inserted into the glue dispensing groove.

[0017] The embodiments of the present application also provide a battery pack comprising the shell assembly of any one of the above embodiments.

[0018] The embodiments of the present application also provide an energy storage power supply comprising the shell assembly of any one of the above embodiments and an inverter arranged inside the shell assembly.

[0019] Thus, the shell assembly, the battery pack and the energy storage power supply of the present application accommodate the battery cell in the receiving cavity inside the shell, and the through hole of the mounting wall of the shell is designed for the connection of the battery cell and external equipment. The design that one of the cover plate and the mounting wall protrudes into the recess of the other one realizes the close fit between the cover plate and the shell, effectively preventing water and other external substances from penetrating into the shell through the joint.

[0020] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0022] Fig. 1 is a structural schematic diagram of a shell assembly according to an embodiment of the present application;

[0023] Fig. 2 is a first exploded schematic diagram of the shell assembly according to an embodiment of the present application;

[0024] Fig. 3 is a second exploded schematic diagram of the shell assembly according to an embodiment of the present application;

[0025] Fig. 4 is a first schematic diagram of a cover covering the shell according to an embodiment of the present application;

[0026] Fig. 5 is a second schematic diagram of the cover covering the shell according to an embodiment of the present application;

[0027] Fig. 6 is a structural schematic diagram of the shell (excluding the battery cell) according to an embodiment of the present application;

[0028] Fig. 7 is a structural schematic diagram of the battery cell according to an embodiment of the present application;

[0029] Fig. 8 is a structural schematic diagram of the shell (including the battery cell) according to an embodiment of the present application;

[0030] Fig. 9 is a partially enlarged structural schematic diagram of A in Fig. 1;

[0031] Fig. 10 is a sectional view of the shell assembly along line B-B in Fig. 1;

[0032] Fig. 11 is a partially enlarged structural schematic diagram of C in Fig. 10.

[0033] Main element reference numerals: shell assembly 100, shell 10, cover 20, battery cell 30, explosion-proof valve 31, accommodating cavity 40, mounting wall 50, through hole 51, support column 52, accommodating space 60, first busbar 61, second busbar 62, first collecting plate 63, second collecting plate 64, sealing ring 70, accommodating groove 81, fixing bracket 82, protruding column 91, dispensing groove 92. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which like reference numerals refer to like elements or elements having the same function throughout the description of the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0035] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and arrangements of the specific examples are described in the following. Of course, they are merely examples and are not intended to limit the present application. The present application can repeat the reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0036] Cell To Product (CTP) structure is an innovative battery pack design, which abandons the traditional battery module level, directly integrates the battery cell into the shell or frame of the battery pack, aiming to improve the energy density of the battery system, reduce the weight, reduce the cost, and simplify the manufacturing and assembly process of the battery pack.

[0037] The CTP structure directly fixes the battery cell on the shell, which causes part or all of the battery cell to be exposed, making the sealing of the battery pack challenging. If the sealing is poor or the sealing element is damaged due to aging, external substances such as water may penetrate into the shell through the joint interface, causing problems such as short circuit and corrosion of the battery cell. The exposed part of the battery cell is more likely to become a channel for water penetration.

[0038] Therefore, referring to FIGS. 1, 2 and 3, the shell assembly 100 according to the present application is provided for fixing the battery cell 30. The shell assembly 100 comprises a shell 10 and a cover plate 20. The shell 10 has an accommodating cavity 40 formed inside to accommodate the battery cell 30, and the shell 10 has a mounting wall 50 formed on one side of the accommodating cavity 40, which has a fixing structure for fixing the battery cell 30. The fixing structure has a through hole 51 formed at a corresponding position, and the battery cell 30 is in communication with the outside of the accommodating cavity 40 through the through hole 51. The cover plate 20 is arranged on the side of the mounting wall 50 away from the accommodating cavity 40 to isolate the battery cell 30 from the outside. The cover plate 20 and one of the mounting wall 50 have a groove formed around the periphery, and the other has a protrusion formed around the periphery, which is inserted into the groove.

[0039] In this way, the shell assembly 100 according to the present application accommodates the battery cell 30 in the accommodating cavity 40 inside the shell 10, and the through hole 51 of the mounting wall 50 of the shell 10 is designed for the connection of the battery cell 30 with external equipment. The design of the protrusion of one of the cover plate 20 and the mounting wall 50 inserted into the groove of the other achieves a close fit between the cover plate 20 and the shell 10, effectively preventing water and other external substances from penetrating into the shell through the joint.

[0040] Specifically, the shell assembly 100 comprises a shell 10 and a cover plate 20.

[0041] The housing 10 forms a containing cavity 40 inside to accommodate the battery cell 30, providing a stable and safe storage environment for the battery cell 30. The housing 10 also firmly fixes the battery cell 30 and other internal components in designated positions through its internal structure and fixing devices, preventing them from loosening or shifting during transportation and use.

[0042] The cover plate 20 is arranged on the mounting wall 50 of the housing 10, isolating the mounting wall 50 from the outside, thereby effectively preventing external substances such as water and dust from entering the inside of the housing 10 through the mounting wall 50, protecting the battery cell 30 and other internal components from pollution and damage. Through the cooperation of the groove and the protrusion formed with the mounting wall 50, the cover plate 20 achieves a tight fit and sealing with the housing 10, further improving the waterproof performance of the entire shell assembly 100.

[0043] The material of the shell assembly 100 is plastic, which has low density, high strength, and good insulation, helping to ensure the safety of the battery cell 30.

[0044] Further, one of the cover plate 20 and the mounting wall 50 is formed with a groove around its periphery, and the other is formed with a protrusion around its periphery, and the protrusion is inserted into the groove. There are two forms of insertion:

[0045] Please refer to FIG. 4, the cover plate 20 is formed with a groove around its periphery, and the mounting wall 50 is formed with a protrusion around its periphery, which can provide more stable support and fixing effect. Please refer to FIG. 5, the cover plate 20 is formed with a protrusion around its periphery, and the mounting wall 50 is formed with a groove around its periphery, which can make it easier to disassemble the cover plate 20. No matter which case, as long as the protrusion and the groove are designed reasonably and fit tightly, a good sealing effect can be achieved.

[0046] In some embodiments, the groove is filled with adhesive.

[0047] Specifically, there may be accumulated water on the ground or wet ground, and water may enter from the gap between the groove and the protrusion. To this end, the groove can be filled with adhesive, which can not only bond the cover plate 20 and the housing 10, but also play a waterproof function.

[0048] The material used for the adhesive should consider excellent waterproof, moisture-proof, corrosion-resistant, insulating and other properties, which can be polyurethane glue or acrylic ester glue. Polyurethane glue is a commonly used adhesive, which has good bonding properties and water resistance. The molecular structure of polyurethane glue contains a large number of urethane bonds, which makes the polyurethane glue have high cohesion and adhesion, and can firmly bond various materials, including metal, plastic, rubber, etc. At the same time, polyurethane glue also has good water resistance and weather resistance, and can maintain the bonding effect for a long time in humid or harsh environments. Acrylic ester glue also has excellent bonding properties and waterproof function. The molecular structure of acrylic ester glue contains a large number of acrylic ester groups, which makes the acrylic ester glue have high reactivity and adhesion, and can quickly cure and form a firm chemical bond with the surface of the adherend. In addition, acrylic ester glue also has good water resistance and chemical medium resistance, and can maintain stable bonding effect in water or various chemical media.

[0049] In some embodiments, a recess is provided inside the housing, and a protrusion is formed on the outer wall of the housing.

[0050] Specifically, the main function of the elastic seal is to provide a sealing effect, preventing external substances such as water and dust from entering the inside of the housing through the gap, thereby protecting the internal battery 30 and other elements from contamination and damage.

[0051] The elastic seal is placed inside the recess and tightly fits the wall surface of the recess. This design ensures a gapless connection between the seal and the housing 10, thereby improving the reliability of the seal.

[0052] The protrusion abuts against the elastic seal, and when the recess and the protruding part cooperate, the protruding part will press the elastic seal inside the recess, making it further deform and tightly fill the tiny gap between the recess and the protrusion. This abutting action not only enhances the sealing effect, but also improves the stability of the connection.

[0053] The elastic seal can be made of materials with good elasticity and aging resistance, such as rubber, silicone, etc. These materials can maintain stable performance over a long period of use and are not prone to aging and hardening.

[0054] Please refer to Figure 6, in some embodiments, the installation wall 50 is formed with an installation groove away from one side of the containing cavity 40, the bottom of the installation groove is formed with a through hole 51, the cover plate 20 is covered on the installation groove, the periphery of the installation groove is formed with a recess, and the periphery of the cover plate 20 is formed with a protrusion.

[0055] Specifically, the periphery of the installation groove of the installation wall 50 is formed with a recess, which shape and size match the shape and size of the protrusion of the cover plate 20, so that the cover plate 20 can be accurately placed in the installation groove, thereby realizing positioning and fixing.

[0056] The bottom of the mounting groove is formed with a through hole 51 for electrical connection, which allows the passage of electric current and the like to meet the operating requirements of the battery cell 30 inside the housing 10.

[0057] The housing 10 also has a plurality of support pillars 52 for supporting the battery cell 30 and other electronic devices inside the housing to prevent damage due to extrusion.

[0058] The raised portion of the perimeter of the cover plate 20 will naturally align with and fit into the groove. As the cover plate 20 is further pressed down, the raised portion will be extruded by the groove and deformed to a certain extent, thereby forming a tight contact with the wall of the groove. This contact not only achieves a physical connection between the cover plate 20 and the housing 10, but also enhances the stability and sealing of the connection through the compression force between the raised portion and the groove. Through the tight contact and compression force between the raised portion and the groove, a good sealing effect is achieved, effectively preventing external substances such as water and dust from entering the interior of the housing 10.

[0059] Please refer to FIG. 3, in some embodiments, the mounting wall 50 and the cover plate 20 form a receiving space 60, the electrodes of the battery cell 30 are in communication with the receiving space 60 through the through hole 51, and the receiving space 60 is provided with a busbar, which is electrically connected with the electrodes of the battery cell 30.

[0060] The receiving space 60 is a space surrounded by the mounting wall 50 and the cover plate 20, used for placing the busbar, the collector plate and other electronic devices.

[0061] Please refer to FIG. 7 and FIG. 8, the battery cell 30 can be a cylindrical battery cell. The battery cell 30 includes a body 31, a first pole 32 and a second pole 33. The first pole 32 and the second pole 33 are respectively arranged at the two ends of the length direction of the body 31. The battery cell 30 can be placed vertically in the receiving cavity 40, and the vertical direction corresponds to the length direction of the body 21.

[0062] The busbar is a metal strip or plate used for collecting and distributing electric current. The busbar material can be copper, aluminum, nickel or alloy material. After the busbar is fixed to the correct position by the work jig, the busbar can be welded with the first pole 32 or the second pole 33 of the battery cell 30 by laser welding. It can be understood that the electrical connection between the busbar and the pole of the battery cell 30 can also be achieved by twisting or pressing and other connection methods.

[0063] The busbar connects the electrodes of multiple battery cells 30 to form an overall current transmission network. This can ensure that the current can flow evenly through each battery cell 30, improving the overall performance and safety of the battery module.

[0064] The acquisition board is a circuit board specially designed to collect the state information of the battery cell 30. Through high-precision sensors or measurement circuits, the acquisition board collects analog signals such as voltage, current, and temperature of the battery cell 30 and converts them into digital signals for subsequent processing. By monitoring and collecting the state information of the battery cell 30 in real time, the working state of the battery cell 30 can be accurately grasped, and appropriate control measures can be taken in a timely manner, thereby avoiding potential safety risks such as overcharging, over-discharging, and overheating of the battery cell 30, and improving the service life and performance of the battery cell 30.

[0065] The first acquisition board 63 can be fixed to the corresponding position of the first busbar 61 by screws, and the second acquisition board 64 can be fixed to the corresponding position of the second busbar 62 by screws. After the acquisition board is fixed, the nickel strip of the first acquisition board 63 can be connected to the first busbar 61 by laser welding or other electrical connection methods, thereby realizing the electrical connection between the first acquisition board 63 and the first busbar 61. The state information of the battery cell 30 can be collected by the acquisition assembly. The state information of the battery cell 30 can include information such as voltage, current, and temperature of each battery cell 30.

[0066] A sealing ring 70 is arranged between the cover plate 20 and the outer side wall of the shell 10 to enhance the sealing effect, thereby isolating the busbar from the external water vapor.

[0067] Please refer to FIG. 9. In some embodiments, the battery cell 30 further includes an explosion-proof valve 31, and the mounting wall 50 and the cover plate 20 form a receiving space 60, and the explosion-proof valve communicates with the receiving space 60 through the through hole 51.

[0068] The explosion-proof valve 31 is installed on the battery cell 30 and communicates with the receiving space 60 through the through hole 51. The main function of installing the explosion-proof valve 31 on the battery cell 30 is to automatically release pressure when the internal pressure of the battery cell 30 is too high, thereby preventing the battery cell 30 from exploding. When the internal pressure of the battery cell 30 exceeds a set value, the explosion-proof valve 31 will automatically open or rupture, allowing the internal gas or liquid to quickly escape, thereby reducing the internal pressure of the battery cell 30.

[0069] In some embodiments, the receiving space 60 is further provided with a pressure relief channel that communicates with the receiving cavity 40 or the outside of the shell 10.

[0070] In order to further ensure safety, the receiving space 60 is further provided with a pressure relief channel that communicates with the receiving cavity 40 or the outside of the shell 10. This channel allows the gas or liquid in the receiving space 60 to be smoothly discharged to the external environment after the explosion-proof valve 31 releases pressure, avoiding accumulation in the receiving space 60 and potential dangers.

[0071] In some embodiments, the mounting wall 50 is arranged at the bottom of the shell 10.

[0072] The mounting wall 50 is located at the bottom of the shell 10, providing stable support for the battery cell 30 or other installed components. This design helps to ensure the stability of the battery cell 30 during operation, reducing the risk of damage caused by vibration or impact.

[0073] The mounting wall 50 is arranged at the bottom, on the one hand, the joint between the cover plate 20 and the shell 10 is not easy to be seen, on the other hand, the overall gravity of the product can make the cover plate 20 and the shell 10 more stable.

[0074] The mounting wall 50 at the bottom can also be related to the heat dissipation design. If the battery cell 30 generates a large amount of heat during operation, the bottom of the shell 10 can be designed with heat dissipation fins, heat dissipation holes, or structures connected to other heat dissipation systems to effectively dissipate heat to the external environment.

[0075] Please refer to Figure 8, in some embodiments, the fixing structure is a receiving groove 81, one end of the battery cell 30 is inserted into the receiving groove 81, and the receiving groove 81 is provided with a through hole 51 at the bottom.

[0076] In this embodiment, the fixing structure also includes a fixing bracket 82 connected to the shell 10 for fixing the battery cell 30 in the receiving groove 81. The receiving groove 81 and the fixing bracket 82 are respectively at both ends of the battery cell 30. The receiving groove 81 is provided with a through hole 51 at the bottom, and the electrode of the battery cell 30 communicates with the outside through the through hole 51. The receiving groove 81 fixes one end of the battery cell 30, and the first pole 32 communicates with the outside through the through hole 51, and the fixing bracket 82 can fix the other end of the battery cell 30. Thus, when the shell assembly 100 is subjected to external disturbances such as vibration, the battery cell 30 is prevented from being bent or thrown out.

[0077] In some embodiments, one of the mounting wall 50 or the cover plate 20 is provided with a support structure abutting the other one of the mounting wall or the cover plate.

[0078] In a battery module, the cover plate 20 is a large plastic plate, which is only fixed by the four sides of the cover plate 20, and there may be a possibility of collapse or arching in the middle, which will affect the overall stability and sealing of the shell assembly 100 structure. To solve this problem, a support structure can be provided on one of the mounting wall 50 or the cover plate 20 to ensure the flatness and stability of the cover plate 20.

[0079] The support structure is mounted on the mounting wall 50 or the cover plate 20 to ensure that the mounting wall 50 and the cover plate 20 can be tightly butted together. When the support structure is arranged on the mounting wall 50, it is necessary to ensure that the support structure does not interfere with the battery cell 30 or other internal components. When the support structure is selected to be arranged on the cover plate 20, the support structure should be designed to match the corresponding part on the mounting wall 50 so as to be tightly fitted when assembled. The support structure can be designed as a plurality of dot-shaped supports, columnar supports or net-shaped supports to disperse and support the weight of the cover plate 20.

[0080] In some embodiments, the support structure is a convex column 91, one of the mounting wall 50 or the cover plate 20 is provided with the convex column 91, and the other of the mounting wall 50 or the cover plate 30 is provided with a point glue groove 92 into which adhesive is injected, and the convex column 91 is inserted into the point glue groove 92.

[0081] Please refer to FIG. 10 and FIG. 11. In this embodiment, the convex columns 91 are arranged on the cover plate 20 in a uniform manner, and the point glue grooves 92 matched with the convex columns 91 are arranged on the mounting wall 50 in a uniform manner. On the one hand, the mutual butt joint of the convex columns 91 and the point glue grooves 92 can form a supporting effect, so as to avoid the collapse of the cover plate 20 to the bus bar or cause the deformation of the cover plate 20 to affect the appearance. On the other hand, the point glue grooves 92 are injected with adhesive, and the adhesive can form a bonding with the convex columns 91 and the point glue grooves 92, so as to better realize the connection of the cover plate 20 and the mounting wall 50.

[0082] The present application also provides a battery pack comprising the shell assembly 100 according to any one of the above embodiments.

[0083] The present application also provides a storage power supply comprising the shell assembly 100 according to any one of the above embodiments and an inverter arranged inside the shell assembly 100. The difference between the battery pack and the storage power supply is that the storage power supply can convert the electric energy of the battery into alternating current to output alternating current to the outside.

[0084] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] While the embodiments of the present application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the present application, the scope of which is defined by the claims and their equivalents.

Claims

1. A housing assembly for securing a cell, wherein, The shell assembly comprises: a shell, which forms a receiving cavity for receiving a battery cell inside, the shell having a mounting wall with a fixing structure for fixing the battery cell formed on one side of the receiving cavity, the fixing structure having a through hole formed at a corresponding position, the battery cell being in communication with the outside of the receiving cavity through the through hole; a cover plate, which is arranged on the side of the mounting wall away from the receiving cavity to isolate the battery cell from the outside, the cover plate and one of the mounting wall having a groove formed on the periphery thereof, and the other having a protrusion formed on the periphery thereof, the protrusion being inserted into the groove.

2. The housing assembly of claim 1, wherein, The groove is filled with adhesive.

3. The housing assembly of claim 1, wherein, An elastic sealing member is arranged in the groove, and the protrusion abuts against the elastic sealing member.

4. The housing assembly of any one of claims 1-3, wherein, The side of the mounting wall away from the receiving cavity is formed with a mounting groove, the bottom of the mounting groove being formed with the through hole, the cover plate being arranged in the mounting groove, the periphery of the mounting groove being formed with the groove, and the periphery of the cover plate being formed with the protrusion.

5. The housing assembly of any one of claims 1-4, wherein, The mounting wall and the cover plate are formed with a receiving space, the electrode of the battery cell being in communication with the receiving space through the through hole, and the receiving space being provided with a busbar electrically connected to the electrode of the battery cell.

6. The housing assembly of any one of claims 1-4, wherein, The battery cell further comprises an explosion-proof valve, the mounting wall and the cover plate being formed with a receiving space, the explosion-proof valve being in communication with the receiving space through the through hole.

7. The housing assembly of claim 6, wherein, The receiving space is further provided with a pressure relief channel in communication with the receiving cavity or the outside of the shell.

8. The housing assembly of claim 1, wherein, The mounting wall is arranged at the bottom of the shell.

9. The housing assembly of any of claims 1-8, wherein, The fixing structure is a receiving groove, one end of the battery cell being inserted into the receiving groove, and the bottom of the receiving groove being provided with the through hole.

10. The housing assembly of claim 1, wherein, One of the mounting wall or the cover plate is provided with a support structure, which abuts against the other.

11. The housing assembly of claim 10, wherein, The support structure is a protrusion, one of the mounting wall or the cover plate being provided with the protrusion, and the other being provided with an adhesive groove, the adhesive groove being filled with adhesive, and the protrusion being inserted into the adhesive groove.

12. A battery pack, wherein, The shell assembly comprises:

13. 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