A shell assembly, a battery, a battery pack, and an electric device

Abstract

The application provides a shell assembly, a battery, a battery pack, a battery pack and an electric device, and relates to the technical field of batteries. The shell assembly comprises a shell body, the shell body having a first wall; a pole column, the pole column being arranged on the first wall; and a terminal plate, the terminal plate being located on the outside of the shell body and being in conductive connection with the pole column, the maximum length of the terminal plate in the width direction of the first wall being a1 mm, the maximum length of the terminal plate in the thickness direction of the first wall being d1 mm, and a1 / d1 being greater than or equal to 2.4. The terminal plate comprises a first area (310) and a second area, the second area being arranged on the outside of the first area, and the surface of the first area away from the first wall being located on the side of the second area away from the first wall, so that the welding effect between the terminal plate and the busbar can be avoided from being affected by the deformation of the edge area of the terminal plate when the terminal plate is welded with the busbar.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a housing assembly, a battery, a battery pack, and an electrical device. Background Technology

[0002] During battery pack assembly, it is usually necessary to connect the terminal assemblies of multiple individual cells through a busbar to achieve series or parallel connection between multiple individual cells.

[0003] When the busbar is soldered to the terminal block assembly, it is relatively easy for poor solder joints to occur, resulting in poor current carrying capacity between the busbar and the terminal block assembly. Utility Model Content

[0004] This application provides a housing assembly, a battery, a battery pack, and an electrical device to solve the problem of poor soldering that easily occurs when welding the busbar and the terminal assembly.

[0005] In a first aspect, this application provides a housing assembly, comprising:

[0006] A shell body having a first wall;

[0007] The pole post is disposed on the first wall;

[0008] The terminal plate is located on the outside of the shell body and is electrically connected to the pole post. The maximum length of the terminal plate along the width direction of the first wall is a1 mm, and the maximum length of the terminal plate along the thickness direction of the first wall is d1 mm, where a1 / d1 ≥ 2.4.

[0009] The terminal block includes a first region and a second region. The second region surrounds the outside of the first region, and the surface of the first region facing away from the first wall is located on the side of the second region facing away from the first wall.

[0010] Secondly, this application provides a battery, including a battery cell and a housing assembly as described in the first aspect, wherein the battery cell is located within the housing body and is electrically connected to the terminals.

[0011] Thirdly, this application provides a battery pack including a busbar and at least two housing assemblies as described in the first aspect or batteries as described in the second aspect, wherein the busbar is electrically connected to the terminal blocks of at least two of the batteries or housing assemblies.

[0012] Fourthly, this application provides a power supply device, including an electrical device and a battery as described in the second aspect or a battery pack as described in the third aspect, wherein the battery or the battery pack is used to supply power to the electrical device.

[0013] In the housing assembly, battery, battery pack and electrical device provided in this application, the housing assembly is provided with a housing body, a terminal post and a terminal plate. The terminal post is located on the first wall of the housing body, and the terminal plate is located on the outside of the housing body and is electrically connected to the terminal post. The ratio of the length a1mm of the terminal plate along the width direction of the first wall to the length d1mm of the terminal plate along the thickness direction of the first wall is greater than or equal to 2.4, so that the terminal plate has a suitable size to connect with the busbar and does not occupy too much space in the thickness direction of the first wall.

[0014] Meanwhile, the terminal block includes a first region and a second region. The second region surrounds the outside of the first region, and the surface of the first region facing away from the first wall is located on the side of the second region facing away from the first wall. When the busbar is welded to the first region, there will be a gap between the second region and the busbar. When a1 / d1 is greater than or equal to 2.4, the second region is prone to warping when the terminal block is connected to the pole. At this time, the existence of the gap between the second region and the busbar provides sufficient space for the second region to warp, which can avoid the deformation of the second region from affecting the welding quality between the busbar and the terminal block and reduce the probability of cold solder joints between the busbar and the terminal block. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0016] Figure 1 A perspective view of the battery provided in an embodiment of this application;

[0017] Figure 2 for Figure 1 An enlarged schematic diagram of the structure within the circle;

[0018] Figure 3 A top view of a battery provided in an embodiment of this application;

[0019] Figure 4 for Figure 3 AA section view in the middle;

[0020] Figure 5 for Figure 3 An enlarged schematic diagram of the structure within the frame;

[0021] Figure 6 for Figure 3 Dimensioning diagram of the structure.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10-Battery, 100-Shell body, 110-First wall, 111-Connecting hole, 200-Terminal post, 210-First connecting part, 220-Second connecting part, 300-Terminal plate, 310-First area, 311-Mounting hole, 312-Groove, 320-Second area, 400-Battery cell, 500-Adapter piece, 600-First insulating component, 700-Second insulating component, 800-Electrical insulating component.

[0024] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0026] As mentioned in the background section, when the busbar is welded to the terminal block assembly, it is relatively easy for poor solder joints to occur, resulting in poor current carrying capacity between the busbar and the terminal block assembly.

[0027] Specifically, a terminal assembly typically includes a terminal post and a terminal block. The terminal block is riveted to the terminal post, and the busbar is then connected to the terminal blocks of different batteries, thereby enabling parallel and series connection between batteries.

[0028] When the pole is riveted to the terminal block, the terminal block is subjected to great pressure, which makes the edge of the terminal block easy to lift up. The busbar is mainly welded to the middle area of ​​the terminal block. During welding, the edge of the terminal block will interfere with the busbar, making it difficult for the busbar to be effectively welded to the corresponding area of ​​the terminal block. Therefore, it is very easy to have a problem of poor soldering.

[0029] If a poor solder joint occurs between the terminal board and the busbar, it will affect the current carrying capacity between the terminal board and the busbar, causing excessive heat generation during battery use. This can easily lead to thermal runaway of the battery, posing a serious safety hazard.

[0030] To address the aforementioned issues, this application provides a housing assembly comprising a housing body, a pole, and a terminal plate. The pole is disposed on the first wall of the housing body, and the terminal plate is located on the outside of the housing body and is electrically connected to the pole. The ratio of the length a1mm of the terminal plate along the width direction of the first wall to the length d1mm of the terminal plate along the thickness direction of the first wall is ≥2.4, ensuring that the terminal plate has a suitable size for connection with the busbar without occupying excessive space in the thickness direction of the first wall.

[0031] Meanwhile, the terminal block includes a first region and a second region. The second region surrounds the outside of the first region, and the surface of the first region facing away from the first wall is located on the side of the second region facing away from the first wall. When the busbar is welded to the first region, there will be a gap between the second region and the busbar. This provides sufficient space for the second region to warp up, which can avoid the deformation of the second region from affecting the welding quality between the busbar and the terminal block, and reduce the probability of cold solder joints between the busbar and the terminal block.

[0032] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0033] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, this application provides a housing assembly that is applied to a battery 10 and can encapsulate the battery cell 400 of the battery 10 to protect the battery cell 400.

[0034] The housing assembly includes a housing body 100, a pole post 200, and a terminal block 300.

[0035] The casing 100 is a component used to provide a receiving space to house the battery cell 400, electrode assembly, and other components, and to isolate them from the outside environment. The casing generally has an opening at one end that communicates with the receiving space. This opening can be closed by a cover plate to seal and isolate the internal environment of the battery 10 from the external environment. The materials used to make the casing 100 include, but are not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and aluminum-plastic film.

[0036] The terminal post 200 is used to electrically connect the electrodes of the battery cell 400 located inside the casing 100 to external devices (adjacent batteries or other electrical equipment) located outside the casing 100. The battery 10 can discharge to external devices through the tabs of the battery cell 400 and the terminal post 200, and an external power source can charge the battery 10 through the terminal post 200 and the tabs. The terminal post 200 can be directly electrically connected to the tabs of the battery cell 400, or it can be electrically connected to the tabs through a metal adapter. The materials used to make the terminal post 200 include, but are not limited to, metals such as copper, aluminum, aluminum alloys, and copper-aluminum alloys.

[0037] Specifically, the housing body 100 has a first wall 110, which can be a wall on any side of the housing body 100. The terminal post 200 is disposed on the first wall 110 and can be electrically connected to the battery cell 400 inside the housing body 100. The terminal plate 300 is electrically connected to the terminal post 200, usually by riveting. The terminal plate 300 can be welded to the busbar, so that the corresponding terminal post 200 can be connected in parallel or in series with the terminal posts 200 of other housing components.

[0038] For example, a connection hole 111 is provided on the first wall 110, and the pole post 200 is partially inserted into the connection hole 111 and separated from the hole wall of the connection hole 111 by a first insulating member 600. The pole post 200 can be directly electrically connected to the tab of the battery cell 400, or it can be electrically connected to the tab through the adapter piece 500.

[0039] The pole post 200 extends to the outside of the first wall 110. The terminal plate 300 is riveted to the portion of the pole post 200 extending to the first outside, and the second insulating member 700 is pressed against the outer surface of the first wall 110. The second insulating member 700 separates the first wall 110 from the terminal plate 300. The side of the terminal plate 300 facing away from the first wall 110 can be used for welding with the busbar.

[0040] In the first wall 110, the length of the terminal plate 300 in the width direction (X direction) is a1mm. According to the conventional battery, a1mm can usually be 12mm-85mm, such as 15mm, 20mm, 50mm, 72mm, 80mm, 83mm, etc., preferably 15mm-80mm.

[0041] Along the thickness direction (Z direction) of the first wall 110, the length of the terminal plate 300 is d1mm. According to the conventional battery, d1mm can usually be 1.5mm-10mm, such as 1.6mm, 2mm, 5mm, 7mm, 8mm, 9.5mm, etc., preferably 2-8mm, and a1 / d1 is ≥2.4, such as 3, 8, 11, 12, 17, etc.

[0042] This allows the terminal block 300 to have a suitable size for connection with the busbar without taking up too much space in the Z direction.

[0043] However, when a1 / d1≥2.4, the edge of the terminal plate 300 is prone to warping when the terminal plate 300 is riveted to the pole 200. When the terminal plate 300 is welded to the busbar, the warped area of ​​the terminal plate 300 edge is prone to interference with the busbar, resulting in a poor solder joint and affecting the current flow between the terminal plate 300 and the busbar.

[0044] In this regard, the terminal block 300 includes a first region 310 and a second region 320. The second region 320 is disposed outside the first region 310, and the distance between the surface of the first region 310 away from the first wall 110 and the first wall 110 is greater than the distance between the surface of the second region 320 away from the first wall 110 and the first wall 110. That is, the height of the first region 310 in the Z direction is greater than the height of the second region 320 in the Z direction, so that in the Z direction, the surface of the first region 310 away from the first wall 110 is higher than the second region 320.

[0045] When the busbar is welded to the second region 320, a gap can be formed between the busbar and the second region 320. Even if the second region 320 deforms and tilts towards the busbar when the terminal plate 300 is riveted to the pole 200, the gap can accommodate the tilted part of the second region 320, preventing the second region 320 from interfering with the welding between the busbar and the first region 310. This effectively reduces the probability of a poor weld between the busbar and the terminal plate 300, and improves the connection between the two. This ensures the overcurrent capacity of the busbar and the terminal plate 300, thereby reducing the probability of thermal runaway of the battery 10 using this housing assembly and improving the safety of the battery 10.

[0046] Furthermore, in some embodiments of this application, the area of ​​the terminal plate 300 projected onto the surface of the first wall 110 is S1mm. 2 For commonly used batteries, S1 mm 2 The value is usually 300mm 2 -6400mm 2 For example, 350mm 2 700mm 2 1500mm 2 3000mm 2 3800mm 2 4900mm 2 5500mm 2 The orthographic projection of the first region 310 onto the surface of the first wall 110 is S2mm. 2 For commonly used batteries, S2 mm2 The value is usually 150mm 2 -5600mm 2 For example, 200mm 2 600mm 2 1300mm 2 2800mm 2 3800mm 2 4900mm 2 5500mm 2 For example, S2 / S1 is 0.5-0.95, such as 0.52, 0.6, 0.7, 0.8, 0.93, etc.

[0047] If S2 / S1 is less than 0.5, it indicates that the proportion of the first region 310 is small, the area on the terminal block 300 used for welding with the busbar is small, resulting in a small welding area between the terminal block 300 and the busbar, which will affect the current flow effect between the two and easily cause thermal runaway.

[0048] If S2 / S1 is greater than 0.95, it indicates that the proportion of the second region 320 is small, and the deformed area of ​​the terminal block 300 may extend into the first region 310, making it difficult for the gap between the second region 320 and the busbar to accommodate the raised area. This will affect the welding effect between the terminal block 300 and the busbar, that is, it is easy to cause poor welding, affect the welding quality, affect the current flow effect between the two, and also easily cause thermal runaway.

[0049] When S2 / S1 is 0.5-0.95, the proportions of the second region 320 and the first region 310 are appropriate. This ensures that the welding area between the first region 310 and the busbar is suitable, increasing the contact area between them and improving the current carrying capacity. At the same time, the gap formed between the second region 320 and the busbar can effectively accommodate the area of ​​the edge of the terminal board 300 that is raised, thereby avoiding interference with the welding between the busbar and the first region 310, reducing the probability of cold solder joints, and further improving the connection effect between the terminal board 300 and the busbar, thus ensuring the current carrying capacity between them and reducing the probability of thermal runaway.

[0050] Furthermore, along the X direction (the width direction of the first wall 110), the length of the first region 310 is a2mm, which is typically 8mm-80mm, for example, 10mm, 18mm, 30mm, 55mm, 63mm, 75mm, 79mm, etc. For most batteries 10, a2mm can be 10mm-75mm. a2 / a1 is 0.7-0.98, for example, 0.7, 0.82, 0.9, 0.95, etc.

[0051] Specifically, when a2 / a1 is greater than 0.98, it indicates that the length of the first region 310 in the X direction is too large, the length of the second region 320 in the X direction is too small, the terminal block 300 is prone to deformation, and the deformed area may spread to the first region 310, making the deformed area prone to interference with the busbar and causing poor soldering.

[0052] When a2 / a1 is less than 0.7, the proportion of the first region 310 in the X direction is small, while the proportion of the second region 320 in the X direction is large. At this time, although the deformation of the edge will not spread to the first region 310, the welding area between the first region 310 and the busbar will be very small, resulting in poor flow capacity between the two.

[0053] Furthermore, along the X direction, the length a3mm of the second region 320 is 3mm-10mm, for example, 3.3mm, 5mm, 7mm, 8.9mm, 9.5mm, etc.

[0054] For a common battery 10, when the terminal plate 300 is welded to the busbar, the edge of the terminal plate 300 tends to lift up within a certain range. The length a3 of the second region 320 is 3mm-10mm, so that the lifting area is located within the second region 320. The gap between the second region 320 and the busbar can avoid interference between the lifting area and the busbar.

[0055] Furthermore, in some embodiments of this application, the outline of the first region 310 is consistent with the outline of the terminal plate 300.

[0056] For example, the terminal block 300 is a rectangular plate, or a rectangular plate with chamfers, and the first region 310 is also a rectangle with the same outline as the terminal block 300, but scaled down proportionally with respect to the size of the terminal block 300.

[0057] For example, the terminal block 300 is the center of a circle, and the first region 310 is also circular, except that the diameter of the first region 310 is smaller than the diameter of the terminal block 300.

[0058] This helps to maximize the size of the first region 310, thereby increasing the welding area between the first region 310 and the busbar, which in turn helps to improve the flow rate between the two.

[0059] It is understandable that the terminal block 300 can also be other shapes; this is just an example and not a limitation.

[0060] Furthermore, in some embodiments of this application, the shortest distance between the edge of the second region 320 and the edge of the first region 310, projected onto the surface of the first wall 110, is equal in all directions.

[0061] For example, the terminal block 300 is rectangular, and from the second region 320 to the first region 310, the height of the two regions increases in a stepped manner in the Z direction, and the outline of the second region 320 and the outline of the first region 310 are proportionally reduced.

[0062] This can maximize the area of ​​the first region 310 and the second region 320, reduce the probability of interference between the second region 320 and the busbar, and increase the welding area between the first region 310 and the busbar, thereby improving the current flow effect between the terminal block 300 and the busbar from two aspects.

[0063] Furthermore, in some embodiments of this application, along the thickness direction of the first wall 110, the difference in length between the first region 310 and the second region 320 is d2mm, which is typically 0.5mm-5.5mm, for example 0.6mm, 1.2mm, 1.8mm, 2.5mm, 3mm, 3.8mm, 4.8mm, 5.2mm, etc., preferably 1.8-4.8mm, and d2 / d1 is 0.7-0.98, for example 0.75, 0.88, 0.9, 0.95, etc.

[0064] Specifically, in the Z direction, d2 is the height of the first region 310 minus the height of the second region 320, and d1 is the maximum height of the terminal block 300 relative to the height of the second region 320.

[0065] When d2 / d1 is less than 0.7, it indicates that the height difference between the first region 310 and the second region 320 is small, and the gap between the first region 310 and the busbar is narrow. If the edge deformation is slightly large, it will interfere with the busbar and affect the welding between the busbar and the first region 310.

[0066] When d2 / d1 is greater than 0.98, it indicates that the height difference between the first region 310 and the second region 320 is large, and the thickness of the second region 320 is small. This will affect the strength of the entire terminal plate 300, resulting in a significant decrease in the strength of the terminal plate 300. This will affect the assembly of the terminal plate 300 and the pole post 200, and may easily cause the battery 10 to fail to assemble.

[0067] When d2 / d1 is 0.7-0.98, the height of the second region 320 is appropriate, and the gap formed between it and the busbar can effectively accommodate the deformed parts. At the same time, it will not have an excessive impact on the strength of the terminal block 300, nor will it affect the assembly effect between the terminal block 300 and the pole post 200.

[0068] Furthermore, in application, the first region 310 and the second region 320 can be connected in at least the following ways:

[0069] For example, the sidewall of the first region 310 is perpendicular to the surface of the second region 320 that is away from the first wall 110.

[0070] Specifically, the sidewalls adjacent to the first region 310 and the second region 320 are transition surfaces connecting the first region 310 and the second region 320. This transition surface can extend along the Z direction and is perpendicular to the upper surfaces of the first region 310 and the second region 320, so that a step-like structure is formed between the first region 310 and the second region 320, which helps to reduce the processing difficulty of the terminal board 300.

[0071] For example, the terminal block 300 also has a third region that connects the first region 310 and the second region 320. The distance between the third region and the outer surface of the first wall 110 gradually decreases from the first region 310 to the second region 320.

[0072] For example, the surface of the third region that faces away from the first wall 110, i.e., the upper surface in the Z direction, is arc-shaped.

[0073] For example, the surface of the third region that is away from the first wall 110, that is, the upper surface in the Z direction is an inclined plane.

[0074] This method allows the height of the third region to gradually decrease in the Z direction, which can not only avoid interference between the third region and the welding between the busbar and the first region 310, but also help to improve the overall strength of the terminal board 300 and ensure the assembly effect between the terminal board 300 and the pole 200.

[0075] Furthermore, in some embodiments of this application, the terminal plate 300 is a square plate, and along the thickness direction of the first wall 110, i.e. the Z direction, the length of the second region 320 located at the corner region of the terminal plate 300 is less than the length of the remaining part of the second region 320.

[0076] When the terminal plate 300 is a square or rectangular plate, the corner area of ​​the terminal plate 300 is more likely to deform significantly when it is riveted to the pole 200. The length of the corner area of ​​the second region 320 is shorter than the length of the rest of the second region 320. This results in a larger gap between the corner area of ​​the second region 320 and the busbar than the gap between the other parts of the second region 320 and the busbar. This effectively prevents significant deformation of the corner area from affecting the welding between the busbar and the first region 310.

[0077] Further, the length of the terminal plate 300 along the width direction of the first wall 110 is greater than the length of the terminal plate 300 along the length direction of the first wall 110, and the distance between the edge of the second region 320 on the side extending along the width direction of the first wall and the first region 310 is greater than the distance between the edge of the second region 320 on the side extending along the length direction of the first wall 110 and the first region 310.

[0078] It can be understood that the dimension of the longer side of the second region 320 is greater than the dimension of the shorter side of the second region 320. In the length direction of the terminal plate 300, due to the larger dimension, deformation is more likely to occur during welding than in the width direction. By making the dimension of the second region 320 in the region corresponding to the length direction side of the terminal plate 300 larger, that is, the distance between the outer edge of the second region 320 on this side and the first region 310 is larger, the second region 320 can not only effectively correspond to the easily deformable region of the terminal plate 300, but also reduce the influence of the second region 320 on the overall strength of the terminal plate 300.

[0079] Further, in some embodiments of the present application, the pole 200 is riveted to the first region 310, and the maximum distance between the surface of the end of the pole 200 extending to the outside of the first wall 110 and the outer surface of the first wall 110 is d3 mm. It can be understood that, in the Z direction, the height of the pole 200 extending outside the first wall 110 is d3 mm.

[0080] The distance between the surface of the end of the first region 310 facing away from the first wall 110 and the outer surface of the first wall 110 is d4 mm. It can be understood that, in the Z direction, the height of the first region 310 is d4 mm.

[0081] Wherein, d3 ≤ d4, which indicates that in the Z direction, the upper surface of the pole 200 is lower than the upper surface of the first region 310, or the upper surface of the pole 200 is at the same height as the upper surface of the first region 310.

[0082] This prevents the pole 200 from protruding beyond the first region 310, so that the influence of the pole 200 on the welding between the bus member and the first region 310 can be avoided, and the probability of insufficient welding is further reduced.

[0083] Further, d3mm < d4mm can be set, and d4mm - d3mm is 0.1mm-0.8mm, for example, 0.18mm, 0.2mm, 0.3mm, 0.45mm, 0.5mm, 0.68mm, 0.75mm, etc., preferably 0.2mm-0.5mm, which can meet the use requirements of most batteries 10.

[0084] This ensures that the terminal 200 maintains a distance from the busbar, preventing direct contact between the terminal 200 and the busbar.

[0085] In order to further reduce the probability of the pole post 200 affecting the welding of the busbar and the first region 310, a mounting hole 311 is provided on the first region 310, which extends along the Z direction. The pole post 200 is located in the mounting hole 311. A groove 312 is provided on the side of the first region 310 away from the first wall 110. The groove 312 is arranged around the periphery of the mounting hole 311 and communicates with the mounting hole 311.

[0086] The bottom wall of the groove 312 can be flush with the upper surface of the pole post 200, and the groove 312 further separates the pole post 200 from the welding area of ​​the first region 310 and the busbar.

[0087] Furthermore, in some embodiments of this application, the pole post 200 includes a first connecting portion 210 and a second connecting portion 220 (arranged vertically in the Z direction) disposed from the outer side to the inner side of the first wall 110. The first connecting portion 210 is used to connect with the terminal plate 300, and the second connecting portion 220 is located inside the housing body 100. The orthographic projection of the second connecting portion 220 onto the surface of the first wall 110 is partially located outside the orthographic projection of the first connecting portion 210 onto the surface of the first wall 110.

[0088] The area S2mm² of the orthographic projection of the first region 310 onto the surface of the first wall 110 2 The area S3mm of the orthographic projection of the second connecting part 220 onto the surface of the first wall 110. 2 The ratio is 1.1-2.5, for example, 1.1, 1.8, 2, 2.5, etc.

[0089] Among them, S3mm 2 Typically 750mm 2 -1000mm 2 For example, 770mm 2 800mm 2 830mm 2 900mm 2 980mm 2 etc., preferably 770mm 2 -900mm 2 Within this range, most of the battery 10's usage needs can be met.

[0090] For example, the second connecting portion 220 is located inside the first wall 110 and presses the first insulating member 600 and the third insulating member against the inner surface of the first wall 110. The first insulating member 600 and the third insulating member cooperate to separate the second connecting portion 220 from the first wall 110. The second connecting portion 220 and the first connecting portion 210 extend through the connecting hole 111 to the outside of the first wall 110 and are riveted to the terminal plate 300.

[0091] A riveting groove can be provided on the pole post 200, and a protrusion is provided at the lower end of the mounting hole 311. The protrusion is inserted into the riveting groove, and the second insulating member 700 is sleeved on the outside of the pole post 200. Its lower surface abuts against the outer surface of the first wall 110, and its upper surface abuts against the lower surface of the terminal plate 300.

[0092] Meanwhile, a limiting protrusion can be provided on the second insulating member 700. The limiting protrusion is located on the outside of the second region 320 and abuts against the edge of the second region 320 to help limit the position of the terminal plate 300.

[0093] For the specific shape of the pole post 200, for example, both the first connecting part 210 and the second connecting part 220 are cylindrical, the first connecting part 210 and the second connecting part 220 are coaxially arranged, and the diameter of the first connecting part 210 is smaller than the diameter of the second connecting part 220.

[0094] It is understood that the first connecting part 210 and the second connecting part 220 can also be any other shape, as long as the second connecting part 220 extends at least partially to the outside of the first connecting part 210 and can be assembled and positioned with the first wall 110.

[0095] When S2 / S3 is greater than 2.5, the size of the second connecting part 220 is small, and the assembly strength between the pole post 200 and the first wall 110 and the terminal plate 300 is poor.

[0096] When S2 / S3 is less than 1.1, the area of ​​the first region 310 limits the welding area between it and the busbar, resulting in poor overall current carrying capacity and difficulty in meeting usage requirements.

[0097] When S2 / S3 is 1.1-2.5, the above problems can be avoided, ensuring the assembly strength of the pole 200 and making the current carrying capacity between the terminal block 300 and the busbar appropriate.

[0098] When S2 / S3 is between 1.1 and 2.5, it can be further divided into at least the following two cases:

[0099] For example, the area S2 mm of the orthographic projection of the first region 310 onto the surface of the first wall 110 2 The area S3 mm larger than the orthographic projection of the second connecting part 220 onto the surface of the first wall 1102 .

[0100] At this time, the area of ​​the first region 310 is relatively large, which results in a large welding area between the first region 310 and the busbar, and better current carrying capacity.

[0101] For example, the area of ​​the first region 310 projected onto the surface of the first wall 110 is smaller than the area of ​​the second connection portion 220 projected onto the surface of the first wall 110.

[0102] At this time, the second connecting part 220 is larger in size, which makes the assembly strength between the pole post 200 and the first wall 110 higher.

[0103] Furthermore, along the width direction of the first wall 110, the first region 310 and the second connecting portion 220 are both symmetrically arranged along the central axis of the pole post 200.

[0104] The first region 310 and the second connection portion 220 are both symmetrically arranged along the central axis of the pole post 200, which can effectively improve the current carrying capacity and enhance the performance of the battery 10 using the housing assembly.

[0105] Furthermore, in some embodiments of this application, along the X direction (the width direction of the first wall 110), the distance between the first region 310 and the edge of the first wall 110 is 4mm-30mm, for example, 5mm, 12mm, 20mm, 26mm, 29.5mm, etc.

[0106] When the distance between the first region 310 and the edge of the first wall 110 is 4mm-30mm, the second region 320 has sufficient space to be arranged, thus preventing the deformation area of ​​the terminal board 300 from spreading to the first region 310.

[0107] This application embodiment also provides a battery 10, including a battery cell 400 and a housing assembly as described in the above embodiment. The battery cell 400 is located inside the housing body 100, and the battery cell 400 is electrically connected to the terminal post 200 through an adapter piece 500.

[0108] The battery 10 can store chemical energy and controllably convert it into electrical energy. In the recyclable battery 10, the active materials can be activated by charging after discharge so that it can continue to be used. The cell 400 is the component in the battery 10 where electrochemical reactions occur, and it is the smallest unit in the battery 10 capable of carrying out electrochemical reactions such as charging / discharging.

[0109] A typical lithium-ion battery cell 400 includes a positive electrode, a negative electrode, and a separator. Lithium-ion cells primarily function by the intercalation and deintercalation of lithium ions between the positive and negative electrodes. In cylindrical cells, the three-layer thin-film structure is wound into a cylindrical electrode assembly, while in cuboid cells, the thin-film structure is wound or stacked into an electrode assembly with a roughly cuboid shape.

[0110] This application also provides a battery pack, including a busbar and a housing assembly or battery 10 as described in the above embodiments, wherein the busbar is electrically connected to a terminal board 300 of at least two batteries 10 or housing assemblies.

[0111] Taking a battery pack containing multiple batteries 10 as an example, multiple batteries 110 with similar capacity and internal resistance can be connected in series or in parallel to form a battery pack.

[0112] For example, the busbar may include an arc-shaped transition portion and two connecting plates, which are disposed on both sides of the arc-shaped transition portion and integrally formed with the arc-shaped transition portion. The two connecting plates are connected to the terminal plates 300 of the two batteries 10 respectively.

[0113] This allows the busbar to have a certain degree of flexibility during battery pack use through the arc-shaped transition section, which can reduce the impact on the welding area between the busbar and the terminal board 300 when the battery pack is subjected to vibration and impact.

[0114] This application also provides a battery pack, including the battery 10 or battery group in the above embodiments.

[0115] It is understood that the battery pack usually also includes components such as a housing and a management system. The battery 10 or battery pack is placed inside the housing. The management system monitors the operating status of the battery 10 or battery pack and adapts to cooling the battery 10 or battery pack. These are well known to those skilled in the art, and will not be described in detail here.

[0116] This application also provides an electrical device, including an electrical appliance, using the battery 10 or battery pack from the above embodiments to supply power to the electrical appliance. One or more batteries or battery packs can be used, and the specific number can be adjusted according to actual conditions.

[0117] For example, multiple battery packs can be connected in series, parallel, or in a hybrid configuration (hybrid configuration means that multiple battery packs are connected in both series and parallel) to form a battery device. The battery device can serve as the operating power source for electrical devices or as the driving power source for electrical devices, replacing or partially replacing fuel or natural gas to provide driving power for vehicles.

[0118] For example, the battery device is a cluster-level battery structure formed by multiple battery packs connected in series, wherein the number of battery packs in each cluster is strictly configured according to voltage and capacity requirements. Specifically, the battery unit of the battery device includes multiple battery packs, some of the battery packs are connected in series to form a cluster that meets the preset power supply voltage requirements, and at least one spare battery pack among the multiple battery packs is bypassed.

[0119] It is understood that electrical equipment includes, but is not limited to, energy storage devices, electric ships, aircraft, laptops, power tools, electric bicycles, electric motorcycles, electric cars, military equipment, and aerospace equipment.

[0120] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0121] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A housing assembly, characterized in that, include: A shell body (100) having a first wall (110); A pole post (200) is disposed on the first wall (110); Terminal plate (300) is located on the outside of the shell body (100) and is electrically connected to the pole post (200). The maximum length of the terminal plate (300) along the width direction of the first wall (110) is a1 mm, and the maximum length of the terminal plate (300) along the thickness direction of the first wall (110) is d1 mm, where a1 / d1 ≥ 2.

4. The terminal block (300) includes a first region (310) and a second region (320). The second region (320) surrounds the outside of the first region (310), and the surface of the first region (310) facing away from the first wall (110) is located on the side of the second region (320) facing away from the first wall (110).

2. The housing assembly according to claim 1, characterized in that, The area of ​​the terminal block (300) projected onto the surface of the first wall (110) is S1, and the area of ​​the first region (310) projected onto the surface of the first wall (110) is S2mm. 2 The ratio of S2 to S1 is 0.5-0.

95.

3. The housing assembly according to claim 1, characterized in that, Along the width direction of the first wall (110), the length of the first region (310) is a2 mm, and a2 / a1 is 0.7-0.

98.

4. The housing assembly according to claim 1, characterized in that, Along the width direction of the first wall (110), the length a3mm of the second region (320) is 3mm-10mm.

5. The housing assembly according to claim 1, characterized in that, Along the thickness direction of the first wall (110), the difference in length between the first region (310) and the second region (320) is d2mm, and d2 / d1 is 0.7-0.

98.

6. The housing assembly according to claim 1, characterized in that, The terminal plate (300) is a square plate. Along the thickness direction of the first wall (110), the length of the second region (320) located at the corner of the terminal plate (300) is less than the length of the remaining part of the second region (320).

7. The housing assembly according to claim 6, characterized in that, The distance between the edge of the second region (320) extending along the width direction of the first wall (110) and the first region (310) is greater than the distance between the edge of the second region (320) extending along the length direction of the first wall (110) and the first region (310).

8. The housing assembly according to claim 1, characterized in that, The outline of the first region (310) is consistent with the outline of the terminal plate (300).

9. The housing assembly according to claim 8, characterized in that, The shortest distance between the edge of the second region (320) and the edge of the first region (310) on the orthographic projection of the first wall (110) is equal in all directions.

10. The housing assembly according to claim 1, characterized in that, The sidewall of the first region (310) is perpendicular to the surface of the second region (320) away from the first wall (110).

11. The housing assembly according to claim 1, characterized in that, The terminal block (300) also has a third region connecting the first region (310) and the second region (320), and the distance between the third region and the outer surface of the first wall (110) gradually decreases from the first region (310) to the second region (320).

12. The housing assembly according to claim 11, characterized in that, The surface of the third region away from the first wall (110) is an arc-shaped surface or a slope.

13. The housing assembly according to claim 1, characterized in that, The post (200) is riveted to the first region (310), and along the thickness direction of the first wall (110), the distance between the surface of the end of the post (200) extending to the outside of the case body (100) and the outer surface of the first wall (110) is d3 mm, the distance between the surface of the end of the first region (310) facing away from the first wall (110) and the outer surface of the first wall (110) is d4 mm, and d3≤d4.

14. The housing assembly according to claim 13, characterized in that, d3 mm < d4 mm, and d4 mm - d3 mm is 0.1 mm to 0.8 mm.

15. The housing assembly according to claim 14, characterized in that, The first region (310) is provided with a mounting hole (311) penetrating through the first region (310), the post (200) is partially located inside the mounting hole (311), a groove (312) is provided on the side of the first region (310) facing away from the first wall (110), and the groove (312) is annularly arranged on the peripheral side of the mounting hole (311) and communicates with the mounting hole (311).

16. The housing assembly according to any one of claims 1-15, characterized in that, The post (200) comprises a first connecting portion (210) and a second connecting portion (220) arranged in sequence from the outer side to the inner side of the first wall (110), the first connecting portion (210) is configured to connect with the terminal plate (300), the second connecting portion (220) is located on the inner side of the case body (100), the orthographic projection of the second connecting portion (220) onto the surface of the first wall (110) is partially located outside the orthographic projection of the first connecting portion (210) onto the surface of the first wall (110), and the ratio of the area of the orthographic projection of the first region (310) onto the surface of the first wall (110) to the area of the orthographic projection of the second connecting portion (220) onto the surface of the first wall (110) is 1.1 to 2.

5.

17. The housing assembly according to claim 16, characterized in that, The area of the orthographic projection of the first region (310) onto the surface of the first wall (110) is greater than the area of the orthographic projection of the second connecting portion (220) onto the surface of the first wall (110).

18. The housing assembly according to claim 16, characterized in that, The area of the orthographic projection of the first region (310) onto the surface of the first wall (110) is smaller than the area of the orthographic projection of the second connecting portion (220) onto the surface of the first wall (110).

19. The housing assembly according to claim 16, characterized in that, Along the width direction of the first wall (110), both the first region (310) and the second connecting portion (220) are arranged symmetrically along the central axis of the post (200).

20. The housing assembly according to claim 1, characterized in that, Along the width direction of the first wall (110), the distance between the first region (310) and the edge of the first wall (110) is 4 mm to 30 mm.

21. A battery (10), characterized in that, An electrical core (400) and the housing assembly according to any one of claims 1 to 20 are included, the electrical core (400) is located inside the case body (100), and the electrical core (400) is electrically connected to the post (200).

22. A battery pack, characterized in that, A bus member, and at least two housing assemblies according to any one of claims 1 to 20 or the battery (10) according to claim 21 are included, wherein the bus member electrically connects the terminal plates (300) of at least two of the batteries (10) or the housing assemblies.

23. An electrical appliance, characterized in that, It includes an electrical device, and the battery (10) of claim 21 or the battery pack of claim 22, the battery (10) or the battery pack being used to supply power to the electrical device.

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