Casing components, batteries, and electrical devices

Abstract

This application discloses a casing assembly, a battery, and an electrical device, belonging to the field of battery technology. The casing assembly includes a busbar, a bottom shell, and an explosion-proof valve. The bottom shell is connected to the busbar; the explosion-proof valve includes a grooved explosion-proof valve, which is disposed on the bottom shell along the thickness direction of the busbar. The projection of the connection point between the busbar and the bottom shell on the inner sidewall of the bottom shell is located on the outer periphery of the explosion-proof valve's projection. This technical solution facilitates the opening of the explosion-proof valve, and after the explosion-proof valve is opened, it is less likely to be blocked by the busbar, facilitating the release of gas inside the battery.

Description

[0001] This application is a divisional application. The original application has the application number 202511663433X and the original application date is November 12, 2025. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and more particularly to a casing assembly, a battery, and an electrical device. Background Technology

[0003] During battery use, gases are generated inside, for example, due to electrochemical reactions occurring on the core. To reduce safety risks, explosion-proof valves are installed. When the internal gas pressure or temperature accumulates to a certain level, the explosion-proof valve will rupture or open, entering the open valve state, thereby releasing the gas and preventing an explosion.

[0004] In related technologies, the explosion-proof valve is blocked by the manifold after it is opened, which is not conducive to the release of gas inside the battery. Summary of the Invention

[0005] This application provides a housing assembly, a battery, and an electrical device to at least partially solve the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a housing assembly is provided, comprising: a manifold, including a first portion and a second portion connected to each other, wherein the first portion is provided with a first through hole; A bottom shell includes a first shell portion and a second shell portion connected to each other. The first shell portion and the second shell portion are arranged along the end face of the bottom shell. The second shell portion is connected to the second shell portion. A first chamber is formed between the first shell portion and the first shell portion. The first chamber communicates with the first through hole. An explosion-proof valve is disposed on the first housing portion, and the explosion-proof valve is used to connect the first chamber with the external space of the housing assembly when the valve is open.

[0007] In this embodiment, the gas generated at the core can enter the first chamber through the first through hole. An explosion-proof valve is provided in the first shell. When the pressure increases, the explosion-proof valve ruptures and opens, and the explosion-proof valve is in the open state. By placing the explosion-proof valve in the first shell, the gas is not easily obstructed when the explosion-proof valve is in the open state. The gas can pass through the first through hole and the first chamber, and be depressurized from the explosion-proof valve, which can better release the gas to the external space.

[0008] Optionally, the manifold further includes an intermediate connecting portion, which connects the first portion and the second portion. The intermediate connecting portion has a second through hole, and the space on the side of the second portion away from the bottom shell communicates with the first chamber through the second through hole.

[0009] The first chamber is connected to the space on the side of the second part away from the bottom shell through the second through hole. Therefore, after the valve is opened, the gas in the space on the side of the second part away from the bottom shell can be depressurized through the second through hole and the first chamber from the explosion-proof valve, effectively releasing the gas.

[0010] Optionally, there are multiple second through holes, and the multiple second through holes are arranged around the center of the manifold.

[0011] By setting multiple second through holes, the gas inside the battery can be released more effectively when the valve is opened.

[0012] Optionally, along the thickness direction of the manifold, the first part is located on the side of the second part away from the second shell, and the second part, the first part, and the intermediate connecting part form an annular groove away from the second shell, and the annular groove communicates with the first chamber through the second through hole.

[0013] The second part is positioned closer to the second shell, facilitating connection between the two parts, which can be achieved using laser penetration welding. The first part is positioned closer to the core, also facilitating connection between the first part and the core.

[0014] Optionally, the second shell portion has a groove on the side opposite to the second part. Having a groove on the side of the second shell portion opposite to the second part effectively makes the area where the second shell portion is welded to the second part thinner, thereby facilitating welding.

[0015] Optionally, the first housing portion further includes a first sub-portion and a second sub-portion, the first sub-portion being connected between the second sub-portion and the second housing portion, the second sub-portion being provided with the explosion-proof valve, and the surface of the explosion-proof valve on the side opposite to the manifold being recessed relative to the surface of the first sub-portion on the side opposite to the manifold.

[0016] An explosion-proof valve is provided in the second sub-part. The surface of the explosion-proof valve facing away from the manifold is recessed relative to the surface of the first sub-part facing away from the manifold. When the housing assembly is placed on the table, the first sub-part contacts the table, while the surface of the explosion-proof valve facing away from the manifold can maintain a gap with the table, thus making it less susceptible to wear and damage.

[0017] Optionally, the relationship between the distance H between the surface of the explosion-proof valve facing away from the manifold and the surface of the first sub-part facing away from the manifold, and the thickness H1 of the bottom shell, satisfies the following condition: 0.1H1 < H < 0.3H1. Therefore, the explosion-proof valve is less susceptible to wear and damage, and can open when the pressure exerted by the gas inside the battery reaches a preset value, making it safer.

[0018] Optionally, along the thickness direction of the manifold, the projection of the second portion onto the inner wall of the bottom shell is located on the outer periphery of the projection of the explosion-proof valve. This arrangement ensures that the explosion-proof valve is not obstructed by the second portion, facilitating valve opening, and that after opening, it is less likely to be obstructed by the manifold, facilitating the release of gas inside the battery.

[0019] Optionally, the explosion-proof valve includes a grooved explosion-proof valve.

[0020] Optionally, the thickness of the first shell portion and the thickness of the second shell portion are the same.

[0021] According to a second aspect of this application, a battery is provided, including the aforementioned casing assembly and winding core, the winding core being connected to the busbar.

[0022] According to a third aspect of this application, an electrical device is also provided, including the aforementioned housing assembly or the aforementioned battery.

[0023] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description 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 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.

[0024] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0025] Figure 1 This is a schematic diagram of the overall structure of the shell assembly provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 An internal cross-sectional view of the shell assembly along the AA direction provided in the image; Figure 3 yes Figure 2 Enlarged schematic diagram of part B in the middle; Figure 4 yes Figure 1 An internal sectional view of the shell assembly along the AA direction from another perspective, provided in the image; Figure 5 yes Figure 4 An enlarged schematic diagram of section C; Figure 6 This is a schematic diagram of the structure of the busbar provided in an exemplary embodiment of this disclosure from one perspective; Figure 7 yes Figure 6 An enlarged schematic diagram of section D in the middle; Figure 8 This is a schematic diagram of the busbar provided in an exemplary embodiment of this disclosure from another perspective; Figure 9 yes Figure 8 An enlarged schematic diagram of section E in the middle; Figure 10 This is a block diagram of an electrical device provided in an exemplary embodiment of this disclosure.

[0026] Explanation of reference numerals in the attached figures: 1. Shell assembly; 11. Combination plate; 111. First part; 112. First through hole; 113. Second part; 115. Intermediate connecting part; 116. Second through hole; 117. Annular groove; 12. Bottom shell; 121. First shell section; 1211. First sub-section; 1213. Second sub-section; 122. Explosion-proof valve; 123. Second housing; 124. Groove; 13. First chamber; 2. Battery; 21. Roll core; 3. Electrical equipment. Detailed Implementation

[0027] 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0028] Please combine Figures 1 to 10 According to the first aspect of this disclosure, please refer to Figure 1 A shell component 1 is provided. Please refer to... Figure 2 The housing assembly 1 includes a manifold 11, a bottom housing 12, and an explosion-proof valve 122. Please refer to... Figure 3 and Figure 10 The busbar 11 includes a first part 111 and a second part 113 connected together. Please refer to... Figure 5 The bottom shell 12 includes a first shell portion 121 and a second shell portion 123 connected to each other. The second shell portion 123 is connected to the second part 113. A first chamber 13 is formed between the first shell portion 121 and the first part 111. The first part 111 is provided with a first through hole 112. An explosion-proof valve 122 is disposed on the first shell portion 121. The explosion-proof valve 122 is used to connect the first chamber 13 with the external space of the shell assembly 1 when the valve is open.

[0029] Battery 2 can be a cylindrical battery 2, with a cylindrical shape. Battery 2 may include a busbar 11, a winding core 21, and a housing. The busbar 11 and the winding core 21 are installed inside the housing.

[0030] The outer casing can be made of nickel-plated steel or aluminum, and its shape can be cylindrical with a hollow interior. In some examples, the outer casing can be a single-pass casing, that is, a casing closed at the bottom and open at the top, where the top opening can be used to assemble the core 21 and the manifold 11. In other examples, the outer casing can be double-pass, that is, an outer casing with openings at both the bottom and the top. In some examples, the outer casing can specifically include a connected bottom shell 12 and a side wall, with the side wall and the bottom shell 12 forming a cavity for installing the manifold 11 and the core 21. The side wall forms an opening, which is positioned opposite to the bottom shell 12.

[0031] The core 21 can be formed by stacking a positive electrode sheet, a negative electrode sheet, and a separator through a winding process. The positive electrode sheet is coated with a positive active material, which can include ternary materials, lithium iron phosphate, etc. The negative electrode sheet is coated with a negative active material, which can include graphite, silicon-based materials, etc. The separator isolates the positive and negative electrodes while allowing lithium ions to pass through, preventing short circuits. The separator material can be polyethylene, polypropylene, etc.

[0032] The winding core 21 may also include a positive electrode tab and a negative electrode tab. The positive electrode tab can be welded to the positive electrode sheet and the busbar 11, respectively. When the outer casing is the negative electrode of the battery 2, the negative electrode tab can be welded to the negative electrode sheet and the bottom shell 12 of the outer casing, respectively. The current of the winding core 21 is collected through the busbar 11 and conducted to the external electrode.

[0033] After the wound core 21 is installed into the cylindrical metal casing, the electrolyte injection process can begin. During injection, a needle can be used to inject the electrolyte through the injection port. Due to the negative pressure, the electrolyte can penetrate the gaps between the wound cores 21, allowing it to fully permeate the cores and fill the pores of the cores 21 in liquid form—that is, the microporous structure of the positive electrode, negative electrode, and separator—forming a solid-liquid-solid three-phase interface: electrode active material-electrolyte-separator. The electrolyte acts as an "ion bridge" connecting the positive and negative electrodes. For example, during charging, lithium ions can be extracted from the positive electrode active material and migrate to the surface of the negative electrode via the electrolyte; during discharging, lithium ions can be extracted from the negative electrode and return to the positive electrode via the electrolyte, thus forming a closed ion circuit.

[0034] After the core 21 is soaked in electrolyte, the injection port can be sealed. Specific sealing methods include laser welding or mechanical pressing. The core 21 involves electrochemical side reactions and physical changes, resulting in gas generation. The gas generation process mainly occurs at the interfaces of the positive electrode, negative electrode, and electrolyte.

[0035] During use, battery 2 will generate gas inside, for example, due to electrochemical reactions occurring on the core 21. To reduce safety risks, an explosion-proof valve 122 is provided. When the gas pressure or temperature inside battery 2 accumulates to a certain level, the explosion-proof valve 122 will rupture or open, thereby releasing the gas and preventing an explosion.

[0036] In related technologies, when the core 21 is inserted into the shell, the edge of the manifold 11 is easily deformed and pressed against the bottom of the shell by the pressure of the core 21, which blocks the pressure relief and makes it impossible to effectively release gas, which can easily cause safety hazards.

[0037] To solve the above problems, please combine... Figure 1 and Figure 2 The shell assembly 1 in this embodiment includes a busbar 11 and a bottom shell 12. Please refer to... Figure 3 The busbar 11 includes a first part 111 and a second part 113 connected to each other. The second part 113 can be connected to the outer periphery of the first part 111. The first part 111 and the second part 113 can be integrally formed or connected by welding or other methods.

[0038] The first part 111 can be used to connect to the core 21. In some examples, the first part 111 can be welded to the core 21.

[0039] Please combine Figure 4 and Figure 5 The bottom shell 12 includes a first shell portion 111 and a second shell portion 123 connected to each other. The first portion 111 and the second portion 113 are arranged along the end face of the bottom shell, and the second shell portion 123 can be connected to the outer periphery of the first shell portion 121. The first shell portion 121 and the second shell portion 123 can be integrally formed or connected by welding or other methods.

[0040] In some examples, the thickness of the first shell 121 is the same as the thickness of the second shell 123.

[0041] The second shell portion 123 is connected to the second part 113, and the second shell portion 123 and the second part 113 can be welded together.

[0042] The first shell portion 121 and the first portion 111 are spaced apart, thereby forming a first chamber 13 between the first shell portion 121 and the first portion 111.

[0043] The first part 111 is provided with a first through hole 112, which can penetrate the first part 111 along the thickness direction of the manifold 11. The core 21, the manifold 11 and the bottom shell 12 can be arranged sequentially along the thickness direction of the manifold 11 (or it can also be referred to as the axial direction of the manifold 11).

[0044] The first through hole 112 is used to connect the core 21 and the first chamber 13, so that the gas generated at the core 21 can enter the first chamber 13 through the first through hole 112 to balance the air pressure in the space where the first chamber 13 and the core 21 are located.

[0045] The explosion-proof valve 122 is disposed in the first housing portion, and is used to connect the first chamber to the external space when in the open state. The explosion-proof valve 122 can rupture when the gas pressure inside the battery 2 exceeds a threshold. At this time, the explosion-proof valve 122 is in the open state, which can release the gas inside the battery to avoid an explosion.

[0046] The explosion-proof valve 122 may include a grooved explosion-proof valve 122, which can be designed with grooves on the bottom shell 12 so that it breaks along the grooves when the internal gas pressure of the battery increases. The explosion-proof valve 122 can be located in the first shell 121, so that after the valve is opened, gas can be released through the first through hole 112 and the first chamber 13, effectively releasing gas to the external space, specifically the space outside the battery. The first through hole 112 can also balance the gas pressure on both sides of the manifold 11, that is, it can balance the gas pressure on the side of the manifold 11 away from the bottom shell 12 with the gas pressure in the first chamber 13, making the valve opening more reliable.

[0047] In some examples, the manifold 11 can be entirely disc-shaped, and the thickness direction of the manifold 11 can be its axial direction. The first part 111 can be entirely disc-shaped, and the second part 113 can be entirely annular, with the second part 113 surrounding the outer periphery of the first part 111. In some examples, the first through hole 112 can be a circular hole, and the first through hole 112 can be coaxial with the manifold 11.

[0048] In other examples, the first part may surround the outer periphery of the second part, the first part may have a through hole, the first part and the bottom shell may form a cavity, and the second part may be connected to the bottom shell. The second part and the bottom shell may be welded together.

[0049] In this embodiment, the gas generated by the core 21 can enter the first chamber 13 through the first through hole 112. An explosion-proof valve 122 is provided in the first shell 121. When the pressure increases, the explosion-proof valve 122 ruptures and opens. By placing the explosion-proof valve 122 in the first shell 121, the gas is not easily obstructed after opening. The gas can be released through the first through hole 112 and the first chamber 13, and pressure is released from the explosion-proof valve 122, thus effectively releasing the gas.

[0050] The manifold 11 also includes an intermediate connecting part 115, which is connected between the first part 111 and the second part 113. The intermediate connecting part 115 has a second through hole 116, and the space of the second part 113 on the side away from the bottom shell 12 communicates with the first chamber 13 through the second through hole 116.

[0051] Please combine Figure 6 , Figure 7 , Figure 8 as well as Figure 9 ,in Figure 6 , Figure 7 , Figure 8 as well as Figure 9 These are all schematic diagrams of the busbar 11. Figure 6 , Figure 7 The main focus is on the structure of the busbar 11 on the side opposite to the bottom shell 12. Figure 8 , Figure 9 The image primarily shows the structure of the busbar 11 facing the bottom shell 12. Please refer to... Figure 7 as well as Figure 9 A second through hole 116 is formed in the intermediate connecting part 115. Please refer to... Figure 3 as well as Figure 5 The first chamber 13 is connected to the space on the side of the second part 113 away from the bottom shell 12 through the second through hole 116. Thus, after the valve is opened, the gas in the space on the side of the second part 113 away from the bottom shell 12 can be depressurized through the second through hole 116 and the first chamber 13 from the explosion-proof valve 122, which can effectively release the gas.

[0052] In some embodiments, the second part 113 facing the bottom shell 12 can be connected to the second shell part 123, and the second part 113 facing away from the bottom shell 12 is disposed towards the core 21. The space of the second part 113 facing away from the bottom shell 12 can be understood as the space where the core 21 is located. Inside the battery 2, the space where the core 21 is located is connected to the first chamber 13 through the first through hole 112.

[0053] In some embodiments, after the valve is opened, i.e., when the explosion-proof valve is in the open state, the gas in the space where the core 21 is located can enter the first chamber 13 through the second through hole 116 or through the first through hole 112. The gas entering the first chamber 13 can be depressurized from the ruptured explosion-proof valve 122, thereby effectively releasing the gas. The second through hole 116 can also balance the air pressure on both sides of the manifold 11, that is, it can balance the air pressure on the side of the manifold 11 away from the bottom shell 12 with the air pressure in the first chamber 13, making the valve opening more reliable.

[0054] There are multiple second through holes 116, which are arranged around the center of the manifold 11. By providing multiple second through holes 116, the gas inside the battery 2 can be released more effectively when the valve is opened.

[0055] In some embodiments, a plurality of second through holes 116 are spaced apart on the outer periphery of the first through hole 112.

[0056] In some embodiments, the number of second through holes 116 can be 4 to 8, for example, the number of second through holes 116 can be 4, 5, 6, 7 or 8.

[0057] In some embodiments, a plurality of second through holes 116 may be symmetrically distributed around the center of the first through hole 112.

[0058] The first part 111 is located on the side of the second part 113 away from the second shell 123. The second part 113, the first part 111 and the intermediate connecting part 115 form an annular groove 117 away from the second shell 123. The annular groove 117 communicates with the first chamber 13 through the second through hole 116.

[0059] In some examples, the first portion 111 is located on the side of the second portion 113 opposite to the second shell portion 123, which can be along the thickness direction of the manifold 11. The second portion 113 is located between the first portion 111 and the second shell portion 123, that is, the second portion 113 is positioned closer to the second shell portion 123, thereby facilitating the connection between the second portion 113 and the second shell portion 123. Laser penetration welding can be used to weld the second portion 113 and the second shell portion 123. At the same time, it also facilitates the connection between the first portion 111 and the core 21. The second portion 113 can support the first portion 111.

[0060] The second shell portion 123 has a groove 124 on the side opposite to the second portion 113.

[0061] Since laser penetration welding requires a certain material thickness, in this embodiment, a groove 124 is provided on the side of the second shell 123 away from the second part 113, which is equivalent to making the welding position of the second shell 123 and the second part 113 thinner, thereby facilitating the welding of the second shell 123 of the bottom shell 12 to the second part 113 of the busbar 11.

[0062] The first housing portion 121 further includes a first sub-portion 1211 and a second sub-portion 1213. The first sub-portion 1211 is connected between the second sub-portion 1213 and the second housing portion 123. The second sub-portion 1213 is provided with the explosion-proof valve 122. The surface of the explosion-proof valve 122 on the side away from the manifold 11 is recessed relative to the surface of the first sub-portion 1211 on the side away from the manifold 11.

[0063] It is easy to understand that if the valve opening area of ​​the bottom shell 12 of battery 2 is flush with the bottom surface of the bottom shell 12 of battery 2, battery 2 is easily affected by external factors, causing deformation of the weak area at the explosion-proof valve 122. For example, for a scored explosion-proof valve, it may cause deformation of the inner area of ​​the scored area, or even damage to the residual thickness of the scored area, ultimately leading to sealing failure. For example, the scored area of ​​the bottom shell 12 of battery 2 is easily worn, causing the area inside the scored area to crack, resulting in sealing failure.

[0064] Please combine Figure 5 In this embodiment, the second sub-part 1213 is provided with an explosion-proof valve 122. The surface of the explosion-proof valve 122 facing away from the manifold 11 is recessed relative to the surface of the first sub-part 1211 facing away from the manifold 11. The "inner" in "recessed" refers to the interior of the housing, where the manifold 11 and the core 21 are installed. In other words, the surface of the first sub-part 1211 facing away from the manifold 11 is convex relative to the surface of the explosion-proof valve 122 facing away from the manifold 11. Here, "outer" can refer to the exterior of the housing. When the housing assembly 1 is placed on a table, the first sub-part 1211 will contact the table, while the surface of the explosion-proof valve 122 facing away from the manifold 11 can maintain a gap with the table, thus preventing wear and damage. This reduces the risk of sealing failure of the housing assembly 1 due to external influences during manufacturing. The table can specifically be the ground, a desktop, etc.

[0065] In some embodiments, the explosion-proof valve 122 may include a scored explosion-proof valve 122. Specifically, a score may be scored on the second sub-part 1213. This score may be a closed score or a non-closed score. The score and the area within the score can be understood as the explosion-proof valve 122. When the pressure exerted by the gas inside the battery 2 reaches a preset value, the score is prone to rupture, which can be referred to as valve opening, and the explosion-proof valve 122 is in the open valve state. In some examples, the score may be a closed circular score. When the housing assembly 1 is placed on a table, the first sub-part 1211 contacts the table, while the score can be spaced apart from the table, thus making it less susceptible to wear and damage.

[0066] Please combine Figure 3The relationship between the distance H between the surface of the explosion-proof valve 122 facing away from the manifold 11 and the surface of the first sub-part 1211 facing away from the manifold 11, and the thickness H1 of the bottom shell 12, satisfies the following condition: 0.1H1 < H < 0.3H1. Therefore, the explosion-proof valve 122 is not easily worn or damaged, and it can open when the pressure applied by the gas inside the battery 2 reaches a preset value, making it safer and more reliable.

[0067] Along the thickness direction of the manifold 11, the projection of the second portion 113 onto the inner wall of the bottom shell is located on the outer periphery of the projection of the explosion-proof valve 122. The inner wall of the bottom shell is the side wall of the bottom shell facing the winding core. In other words, the projection of the second portion 113 onto the side wall of the bottom shell facing the winding core is located on the outer periphery of the projection of the explosion-proof valve 122 onto the side wall of the bottom shell facing the winding core. This arrangement ensures that the explosion-proof valve 122 is not obstructed by the second portion 113, facilitating the opening of the explosion-proof valve 122, and after the explosion-proof valve 122 is opened, it is less likely to be obstructed by the manifold 11, facilitating the release of gas inside the battery 2.

[0068] Please combine Figure 4 In some embodiments, the diameter R1 of the explosion-proof valve 122 and the inner diameter R2 of the second portion 113 of the manifold 11 are, in some embodiments, an annular shape, and the explosion-proof valve 122 is a closed circle, so the inner diameter of the second portion 113 of the manifold 11 is the diameter of the annular shape. The diameter R1 of the explosion-proof valve 122 is smaller than the inner diameter R2 of the second portion 113 of the manifold 11. When the explosion-proof valve 122 includes a scored explosion-proof valve 122, the diameter R1 of the explosion-proof valve 122 can be the diameter of the circle containing the center of the scored area. In some embodiments, the explosion-proof valve 122 is a non-closed line or a non-circular shape, and the diameter R1 of the explosion-proof valve 122 can be the diameter of the outer circle of the scored area of ​​the explosion-proof valve 122.

[0069] In some embodiments, the second part 113 is welded to the bottom shell 12, while the explosion-proof valve 122 is disposed on the first shell part 121, and the projection of the second part 113 is located on the outer periphery of the projection of the explosion-proof valve 122. With the above arrangement, when the valve is opened, the second part 113 can also block the outer periphery of the core 21, which can effectively prevent the core 21 from being ejected.

[0070] Please combine Figure 10 According to a second aspect of this disclosure, a battery 2 is provided, comprising the aforementioned housing assembly 1 and a winding core 21, the winding core 21 being connected to the busbar 11. This battery 2 possesses all the beneficial effects of the aforementioned housing assembly 1, which will not be elaborated further herein.

[0071] Please combine Figure 10According to a third aspect of this disclosure, an electrical device 3 is provided, which includes the aforementioned housing assembly 1 or the aforementioned battery 2. The electrical device 3 possesses all the beneficial effects of the aforementioned housing assembly 1 or the aforementioned battery 2, which will not be elaborated further herein. The electrical device 3 may specifically include vehicles, energy storage power supplies, consumer electronics, medical devices, etc.

[0072] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0074] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A housing assembly (1) characterized in that, include: Busbar (11); Bottom shell (12), which is connected to the manifold (11); An explosion-proof valve (122) is provided on the bottom shell (12), along the thickness direction of the manifold (11), and the projection of the connection between the manifold (11) and the bottom shell (12) on the inner wall of the bottom shell is located on the outer periphery of the projection of the explosion-proof valve (122).

2. The housing assembly (1) according to claim 1, characterized in that The manifold (11) includes a first part (111) and a second part (113) connected to each other. The bottom shell (12) includes a first shell portion (121) and a second shell portion (123), the second shell portion (123) being connected to the second part (113). Along the thickness direction of the manifold (11), the projection of the second part (113) on the inner wall of the bottom shell is located on the outer periphery of the projection of the explosion-proof valve (122). At least one of the first part (111) and the second part (113) is used to connect to the core (21), or the first part (111) is used to connect to the core (21).

3. The housing assembly (1) according to claim 2, characterized in that The second shell portion (123) has a groove (124) on the side opposite to the second part (113).

4. The housing assembly (1) according to claim 2, characterized in that The first shell portion (121) further includes a first sub-portion (1211) and a second sub-portion (1213), the first sub-portion (1211) being connected between the second sub-portion (1213) and the second shell portion (123), and the explosion-proof valve (122) being provided on the second sub-portion (1213).

5. The shell assembly (1) according to claim 2, characterized in that, The first part (111) is provided with a first through hole (112), and a first chamber (13) is formed between the first shell part (121) and the first part (111), and the first chamber (13) communicates with the first through hole (112).

6. The housing assembly (1) according to claim 5, characterized in that The busbar (11) further includes an intermediate connecting part (115), which connects the first part (111) and the second part (113). The intermediate connecting part (115) has a second through hole (116), and the space on the side of the second part (113) away from the bottom shell (12) is connected to the first chamber (13) through the second through hole (116).

7. The housing assembly (1) according to claim 6, characterized in that There are multiple second through holes (116), and the multiple second through holes (116) are arranged around the center of the manifold (11).

8. The housing assembly (1) according to claim 6, characterized in that The first part (111) is located on the side of the second part (113) away from the second shell part (123). The second part (113), the first part (111) and the intermediate connecting part (115) form an annular groove (117) away from the second shell part (123). The annular groove (117) communicates with the first chamber (13) through the second through hole (116).

9. The housing assembly (1) according to any one of claims 1 to 8, characterized in that The surface of the explosion-proof valve (122) facing away from the manifold (11) is recessed relative to the surface of the bottom shell (12) facing away from the manifold (11).

10. The housing assembly (1) according to any one of claims 1 to 8, characterized in that The overall shape of the manifold is disc-shaped.

11. The shell assembly (1) according to any one of claims 1 to 8, characterized in that, The relationship between the distance H between the surface of the explosion-proof valve (122) away from the manifold (11) and the surface of the bottom shell (12) away from the manifold (11), and the thickness H1 of the bottom shell (12) satisfies: 0.1H1 < H < 0.3H1.

12. A battery (2) characterized by Includes the shell assembly (1) and the core (21) as described in any one of claims 1-11, wherein the core (21) is connected to the manifold (11).

13. An electrical consumer (3), characterized in that Includes the housing assembly (1) as described in any one of claims 1-11 or the battery (2) as described in claim 12.

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