Housing assembly and power battery

Abstract

The utility model relates to battery technology field, concretely relates to a shell assembly and power battery, and the shell assembly includes: shell, is seted up with through -hole, connecting plate is set up in the through -hole, and the mounting hole is seted up on connecting plate, pole post subassembly, one part of pole post subassembly is embedded in the installation, and the other part of pole post subassembly is overlapped on connecting plate, first insulating part is set up at the bottom of connecting plate, and first insulating part extends to the mounting hole in the direction of being close to pole post subassembly. The embodiment extends to the mounting hole with first insulating part, can directly isolate tab and connecting plate, forms insulating isolation between tab and connecting plate, to prevent tab and connecting plate from being overlapped, avoids the short circuit risk. And, need not additionally stick insulating film on tab, can realize insulating isolation only through the extension of first insulating part, to can simplify the insulating structure, reduce the complexity of assembly, improve assembly efficiency.

Description

Technical Field

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

[0002] Currently, traditional cover plate structures typically consist of a pole and a cover plate. Generally, the pole lug is connected to the pole first, and then the pole and cover plate are connected using laser welding. However, during the actual welding process, because the edge gaps between the pole and cover plate need to be welded, if the edges are not aligned, light leakage can occur. This means the laser can directly penetrate the gap and damage the insulation components or battery cells inside the cover plate, leading to insulation failure or battery cell failure.

[0003] Therefore, some batteries have an additional connecting plate between the cover and the terminal post, so that there is an overlap between the connecting plate and the cover and the terminal post, which can prevent the laser from passing directly through the gap during laser welding.

[0004] However, in actual use, the distance between the electrode tab and the connecting plate is relatively close, which makes it easy for the electrode tab and the connecting plate to overlap, posing a risk of short circuit. Utility Model Content

[0005] In view of this, the present invention provides a housing assembly and a power battery to solve the problem of easy overlap between the electrode tabs and the connecting plate.

[0006] In a first aspect, the present invention provides a housing assembly, the housing assembly comprising: The outer casing has through holes; A connecting plate is provided in the through hole, and mounting holes are provided on the connecting plate. The pole assembly has one part embedded in the mounting hole and the other part overlapping the connecting plate. The first insulating element is disposed at the bottom of the connecting plate; the first insulating element extends into the mounting hole in the direction close to the pole assembly.

[0007] Beneficial effects: In this embodiment, the first insulating member extends into the mounting hole, directly isolating the electrode tab from the connecting plate and forming an insulating barrier between them. This prevents the electrode tab from overlapping with the connecting plate, avoiding the risk of short circuits. Furthermore, there is no need to attach an additional insulating film to the electrode tab; insulation is achieved simply by extending the first insulating member. This simplifies the insulation structure, reduces assembly complexity, and improves assembly efficiency.

[0008] Secondly, this utility model also provides a power battery, which includes: The housing assembly as described in any of the above embodiments has an internal receiving cavity; The battery cell is housed within a housing cavity; the battery cell is connected to the terminal assembly within the housing assembly. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the overall structure of the battery in an embodiment of this utility model; Figure 2 This is a schematic diagram of the battery explosion in an embodiment of this utility model; Figure 3 This is a schematic diagram of the connecting plate in an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the battery along its length in an embodiment of this utility model; Figure 5 for Figure 4 An enlarged diagram in Part A; Figure 6 for Figure 5 Enlarged diagram in Part B; Figure 7 for Figure 6 A parameter annotation diagram of each component.

[0011] Explanation of reference numerals in the attached figures: 1. Outer shell; 11. Through hole; 2. Connecting plate; 21. Mounting hole; 22. Protruding rib; 3. Terminal assembly; 31. Terminal body; 32. Pressure ring; 4. Second insulating component; 5. First insulating element; 51. Body part; 52. Extension part; 53. Protrusion part; 6. Accommodation gap. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0015] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0016] Currently, traditional cover plate structures typically include terminals and a cover plate. Generally, the tabs are connected to the terminals first, and then the terminals are connected to the cover plate via laser welding. However, during the actual welding process, because the edge gaps between the terminals and the cover plate need to be welded, if the edges are not aligned, light leakage can occur. This means the laser can directly pass through the gaps and damage the insulation components or battery cells inside the cover plate, leading to insulation failure or battery cell failure. Therefore, some batteries have an additional connecting plate 2 between the cover plate and the terminals, creating overlap between the connecting plate 2 and both the cover plate and the terminals. This prevents the laser from directly passing through the gaps during laser welding. However, in actual use, the distance between the tabs and the connecting plate 2 is relatively short, making it easy for the tabs to overlap, posing a risk of short circuit.

[0017] In view of this, the present invention provides a housing assembly and a power battery to solve the problem of easy overlap between the electrode tabs and the connecting plate 2.

[0018] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0019] According to an embodiment of the present invention, a housing assembly is provided, which includes a housing 1, a connecting plate 2, a pole assembly 3, and a first insulating member 5.

[0020] Specifically, in this embodiment, a through hole 11 is provided on the outer casing 1. The through hole 11 can be located at the bottom, top, or side wall of the outer casing 1. Of course, this embodiment is merely an example of the location of the through hole 11, and is not intended to limit it. Those skilled in the art can modify it according to actual circumstances, as long as the same technical effect is achieved.

[0021] Furthermore, in this embodiment, the connecting plate 2 is disposed in the through hole 11, and the outer edge of the connecting plate 2 is connected to the outer shell 1. The connecting plate 2 has a mounting hole 21. The connection method between the connecting plate 2 and the outer shell 1 can be riveting, welding, or bonding. Of course, this embodiment is merely an example illustrating the connection method between the connecting plate 2 and the outer shell 1, but it is not intended to limit the scope. Those skilled in the art can modify the method according to actual circumstances, as long as the same technical effect is achieved.

[0022] Furthermore, in this embodiment, a portion of the pole assembly 3 is embedded in the mounting hole 21, and another portion of the pole assembly 3 overlaps the connecting plate 2. The pole assembly 3 can be composed of a pressure ring 32 and a pole body 31. The following embodiments will describe in detail the specific connection method between the two. For example, the inner edge of the pressure ring 32 can be riveted to the pole body 31, and then the entire assembly after riveting the pressure ring 32 and the pole body 31 is placed on the connecting plate 2, and then the bottom of the outer edge of the pressure ring 32 is welded to the connecting plate 2. The connection method between the connecting plate 2 and the pressure ring 32 can be riveting or bonding.

[0023] Furthermore, in this embodiment, the connecting plate 2 not only serves to install the pole assembly 3, but also cooperates with the outer shell 1 to prevent the laser from directly passing through the overlapping area between the two, thereby protecting the first insulating component 5 and the battery cell inside the outer shell 1.

[0024] Furthermore, in this embodiment, the first insulating member 5 is disposed at the bottom of the connecting plate 2, and extends into the mounting hole 21 in a direction close to the pole assembly 3. Of course, the extension length of the first insulating member 5 should not affect the assembly of the pole assembly 3. As for the specific extension length, those skilled in the art can change it according to actual conditions, as long as the same technical effect is achieved.

[0025] With this configuration, the first insulating member 5 extends into the mounting hole 21 in this embodiment, directly isolating the electrode tab from the connecting plate 2 and forming an insulating barrier between them. This prevents the electrode tab from overlapping with the connecting plate 2, avoiding the risk of short circuits. Furthermore, there is no need to attach an additional insulating film to the electrode tab; insulation can be achieved simply by extending the first insulating member 5. This simplifies the insulation structure, reduces assembly complexity, and improves assembly efficiency.

[0026] Furthermore, in an alternative embodiment, the first insulating member 5 extends into the mounting hole 21 and abuts against the pole assembly 3, such that the first insulating member 5 and the pole assembly 3 cover the inner edge of the mounting hole 21.

[0027] Since the first insulating component 5 and the pole assembly 3 cover the inner edge of the mounting hole 21, the first insulating component 5 and the pole assembly 3 cover the entire interior of the connecting plate 2. The electrode tab of the battery cell is on the outside of the connecting plate 2, which prevents the electrode tab from contacting the connecting plate 2.

[0028] With this design, during the drilling process of the connecting plate 2, metal burrs may easily accumulate on the inner edge of the mounting hole 21. If the first insulating member 5 only extends without covering the mounting hole 21, the electrode tab of the battery cell may easily come into contact with the burrs during actual use, potentially leading to electrode breakage or short circuit. After the first insulating member 5 and the terminal assembly 3 cover the inner edge of the mounting hole 21, the electrode tab can be further isolated, preventing it from indirectly contacting the connecting plate 2 through edge burrs. Furthermore, by abutting the first insulating member 5 against the terminal assembly 3, the position of the first insulating member 5 can be restricted, preventing it from shifting during vibration and ensuring long-term reliable coverage.

[0029] Furthermore, in an alternative embodiment, the first insulating member 5 includes a body portion 51 and an extension portion 52.

[0030] Specifically, in this embodiment, the main body 51 is disposed at the bottom of the connecting plate 2, one side of the extension 52 is connected to one side of the main body 51, and the other side of the extension 52 extends into the mounting hole 21 and abuts against the pole assembly 3.

[0031] Furthermore, in this embodiment, the top portion of the body portion 51 is adapted to be embedded in the receiving groove opened at the bottom of the connecting plate 2, and after the top portion of the body portion 51 is embedded in the receiving groove, the bottom portion of the body portion 51 covers the bottom of the connecting plate 2.

[0032] The body portion 51 and the receiving groove can be fixed by an interference fit, or by a snap-fit ​​mechanism, utilizing the inherent elasticity of the first insulating member 5 to achieve engagement and disengagement. Alternatively, they can be fixed by adhesive bonding or screws. This embodiment is merely an example of the engagement method between the body portion 51 and the receiving groove, and is not intended to limit the scope. Those skilled in the art can modify the arrangement according to actual circumstances to achieve the same technical effect.

[0033] Furthermore, in this embodiment, the length of the extension 52 in the horizontal direction is L1mm, and L1mm is between 0.3mm and 1.5mm.

[0034] For example, L1mm can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.71mm, 0.72mm, 0.73mm, 0.74mm, 0.75mm, 0.76mm, 0.77mm, 0.78mm, 0.79mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.1mm, 1.3mm, 1.4mm, 1.5mm, etc. Of course, this embodiment is merely an example of a specific value for L1mm, and does not impose any limitations. Those skilled in the art can modify it according to actual circumstances, as long as the same technical effect is achieved.

[0035] With this configuration, this embodiment, by setting the main body 51 and the extension 52, can cover the bottom of the connecting plate 2 and the area within the mounting hole 21 where the tab may come into contact, thereby providing a certain degree of insulation and protection without interfering with the assembly of the pole. Simultaneously, this embodiment limits the length of the extension 52 to a certain range, ensuring that the extension 52 penetrates the mounting hole 21 sufficiently to block the tab overlap path and preventing the extension 52 from excessively penetrating the pole, thus ensuring a stable connection between the pole and the connecting plate 2. If L1mm is too small, the extension 52 may not penetrate deeply enough into the mounting hole 21, and the tab may still contact the connecting plate 2 from deep within the mounting hole 21. If L1mm is too large, the extension 52 may penetrate excessively, squeezing the mounting area of ​​the pole assembly 3, leading to unstable pole connection.

[0036] Furthermore, in an optional embodiment, the thickness of the extension 52 in the vertical direction is L2mm, where L2mm is between 0.2mm and 1.3mm.

[0037] For example, L2mm can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.1mm, 1.1mm, 1.3mm, 1.4mm, 1.5mm, etc. Of course, this embodiment is merely an example of a specific value for L2mm, and does not limit it. Those skilled in the art can modify it according to actual circumstances, as long as the same technical effect is achieved.

[0038] By limiting the thickness of the extension 52 within a certain range, this embodiment ensures that the extension 52 has sufficient thickness to prevent puncture and guarantee the long-term reliability of the insulation. Simultaneously, it avoids excessive thickness of the extension 52, which could lead to compression of the cell space and thus maintain battery energy density. If L2mm is too small, the extension 52 will be too thin, making it susceptible to puncture by tabs or metal burrs, resulting in insulation failure. If L2mm is too large, the extension 52 will be too thick, increasing the vertical space of the battery, compressing the cell's storage space, and reducing battery energy density.

[0039] Furthermore, in an optional embodiment, the overlap distance between the extension 52 and the pole assembly 3 in the vertical direction is L3mm, where L3mm is between 0.2mm and 0.8mm.

[0040] For example, L3mm can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, etc. Of course, this embodiment is merely an example of a specific value for L3mm, and is not intended to limit it. Those skilled in the art can modify it according to actual circumstances, as long as the same technical effect is achieved.

[0041] By limiting the overlap distance between the extension portion 52 and the terminal assembly 3 within a certain range, this embodiment ensures stable contact between the extension portion 52 and the terminal, with no gaps between them, preventing the tab from entering through gaps, and also preventing obstruction of the connection between the terminal and the tab, ensuring normal current transmission. If L3mm is too small, the overlap distance will be too short, resulting in unstable contact between the extension portion 52 and the terminal. When the battery vibrates, they may easily separate, potentially allowing the tab to enter through gaps. If L3mm is too large, the overlap distance will be too long, causing the extension portion 52 to cover the connection area between the terminal and the tab, affecting current transmission.

[0042] Furthermore, in this embodiment, the positive electrode of the battery cell uses aluminum foil, resulting in a thicker tab and a correspondingly thicker positive electrode post. To ensure insulation between the connecting plate 2 and the electrode post assembly 3, and to maintain sufficient energy density within the battery, the extension 52 and the electrode post assembly 3 overlap vertically. Conversely, the negative electrode of the battery cell uses copper foil, resulting in a thinner tab and a smaller negative electrode post. To ensure insulation between the connecting plate 2 and the electrode post assembly 3, the extension 52 and the electrode post assembly 3 can be spaced apart without affecting the energy density within the battery. Of course, in other embodiments, to balance the overcurrent capacity of the electrode post assembly 3, the energy density within the battery, and the insulation between the connecting plate 2 and the electrode post assembly 3, both the positive and negative electrode post assemblies 3 may overlap with the extension 52 vertically, or both may be spaced apart from the extension 52.

[0043] Furthermore, in this embodiment, the extension 52 and the pole assembly 3 are spaced apart along the vertical direction.

[0044] Furthermore, in an alternative embodiment, the ratio between the overlap distance and the thickness of the extension 52 is L3 / L2, where L3 / L2 is between 0.2 and 0.8.

[0045] For example, the ratio L3 / L2 can be 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, etc. Of course, this embodiment is merely an example illustrating the specific value of the ratio L3 / L2, and is not intended to limit the scope. Those skilled in the art can modify it according to actual circumstances, as long as the same technical effect is achieved.

[0046] By setting the ratio L3 / L2 within a certain range, this embodiment ensures that the extension 52, while having a certain thickness, can stably abut against the electrode post without any gaps, thereby improving the overall insulation effect. If the ratio L3 / L2 is too small (L3mm too small or L2mm too large), it will not provide adequate insulation or adequate insulation isolation for the electrode tab. If the ratio L3 / L2 is too large (L3mm too large or L2mm too small), it may reduce the battery energy density or affect the current transmission effect.

[0047] Furthermore, in an alternative embodiment, the pole assembly includes a pressure ring 32 and a pole body 31.

[0048] Specifically, in this embodiment, the outer circumferential side of the pressure ring 32 is connected to the connecting plate 2, and the inner side of the pressure ring 32 forms an opening. The pole body 31 extends into the opening, and the top circumferential side of the pole body 31 is connected to the pressure ring 32.

[0049] Regarding the specific connection method between the pole body 31 and the pressure ring 32, for example, the inner edge of the pressure ring 32 can be riveted to the pole body 31, and then the entire assembly of the pressure ring 32 and the pole body 31 after riveting can be placed on the connecting plate 2, and then the bottom of the outer edge of the pressure ring 32 can be welded to the connecting plate 2. Of course, the inner edge of the pressure ring 32 can also be welded to the pole body 31.

[0050] This embodiment is merely an example of the connection method between the pressure ring 32 and the pole body 31, but it does not limit the connection. Those skilled in the art can make changes according to the actual situation, as long as the same technical effect can be achieved.

[0051] Furthermore, in this embodiment, the bottom side of the pole body 31 abuts against the extension 52, and the bottom surface of the pole body 31 is connected to the pole ear.

[0052] With this configuration, the pressure ring 32 in this embodiment can press the electrode body 31 from above, preventing the electrode body 31 from being pushed upwards due to vibration, thereby limiting the vertical displacement of the electrode body 31 and ensuring a stable connection between the electrode body 31 and the battery cell. Simultaneously, the pressure ring 32 can distribute the vertical pressure of the electrode body 31 to other positions on the connecting plate 2, further reducing local stress on the connecting plate 2.

[0053] Furthermore, in an alternative embodiment, the extension 52 surrounds the outer circumference of the pole body 31.

[0054] With this configuration, the traditional extension 52 is mostly a partial extension, thus creating isolation dead zones. The electrode tab can bypass the insulating member from the direction of non-extension and then contact the connecting plate 2. However, in this embodiment, the extension 52 is wrapped around the outer circumference of the electrode body 31, forming a ring-shaped insulation effect. No matter which direction the electrode tab bends, the extension 52 can block it, completely covering the risk area around the electrode, thereby preventing the electrode tab from contacting the connecting plate 2 from any direction.

[0055] Furthermore, in an optional embodiment, the pole body 31 and the connecting plate 2 surround to form a receiving gap 6, in which a second insulating element 4 is disposed. With this configuration, since there may be a small gap between the pole body 31 and the connecting plate 2, a short circuit or discharge may occur between them under high-voltage conditions 32. Therefore, in this embodiment, the second insulating element 4 fills the receiving gap 6, which can directly block the internal electrical connection between the pole body 31 and the connecting plate 2, forming a double protection of the first insulating element 5 and the second insulating element 4. At the same time, filling the receiving gap 6 with the second insulating element 4 can reduce the relative vibration between the pole assembly 3 and the connecting plate 2, indirectly ensuring the contact effect of the first insulating element 5.

[0056] Furthermore, in an alternative embodiment, there is a gap between the second insulating member 4 and the upper surface of the extension 52.

[0057] With this design, during actual use, when the electrode body 31 expands due to heat, such as during charging and discharging when the temperature rises, the electrode body 31 may expand, or due to manufacturing errors, the electrode body 31 may be slightly too tall, thus squeezing the second insulating member 4 and the extension 52, causing both to deform and crack. Therefore, this embodiment, by reserving a gap, can accommodate the thermal expansion of the electrode body 31 and manufacturing errors, avoiding damage to the insulating member due to compression.

[0058] Furthermore, in an alternative embodiment, the second insulating member 4 abuts against the upper surface of the extension 52.

[0059] With this configuration, the second insulating member 4 abuts against the upper surface of the extension 52 in this embodiment, thereby achieving a seal through the abutment between the second insulating member 4 and the extension 52. This prevents electrolyte and dust from contaminating the receiving cavity and ensures the performance of the second insulating member 4. Simultaneously, it allows for a seamless connection between the second insulating member 4 and the extension 52, covering all internal gaps and eliminating any insulation dead zones. Furthermore, after the second insulating member 4 and the extension 52 abut against each other, they form a unified whole, which can, to a certain extent, share the impact force of the electrode body 31 during vibration, thereby reducing the possibility of deformation of the electrode body 31.

[0060] Furthermore, in an optional embodiment, a rib 22 is provided on the top of the inner edge of the connecting plate 2, and the second insulating member 4 is provided with a groove suitable for embedding the rib 22.

[0061] With this configuration, if the second insulating element 4 is directly filled into the receiving gap 6 without any positioning structure inside the receiving gap 6, the second insulating element 4 may slide during battery vibration, causing the receiving gap 6 to be exposed to a certain extent. Therefore, in this embodiment, the rib 22 and the groove cooperate to limit the sliding of the second insulating element 4 and ensure that it always fills the receiving gap 6. At the same time, the rib 22 and the groove can serve as assembly references, allowing for installation when they are aligned, thereby reducing assembly errors of the second insulating element 4. Furthermore, by connecting the connecting plate 2 and the second insulating element 4 with a snap-fit ​​connection, the connecting plate 2 and the second insulating element 4 can be integrated into a whole, improving the overall vibration resistance of the structure.

[0062] Furthermore, in an optional embodiment, the first insulating member 5 further includes a protrusion 53 disposed on the bottom end face of the body portion 51. In the vertical direction, the protrusion 53 is closer to the battery cell than the extension portion 52. That is, the protrusion 53 is thicker than the extension portion 52, such that the bottom end face of the protrusion 53 protrudes beyond the bottom end face of the extension portion 52, thereby making the protrusion 53 closer to the battery cell than the extension portion 52.

[0063] With this configuration, this embodiment features a protrusion 53 that extends directly to the vicinity of the top of the battery cell, closer to the cell than the extension 52. This design prevents the tabs from bending upwards from below and also provides some guidance for the tabs. Furthermore, by abutting the top of the battery cell against the protrusion, it can provide a buffering effect when the battery vibrates and causes the cell to sway.

[0064] Furthermore, in an alternative embodiment, the protrusion 53 protrudes with a thickness of L4mm relative to the extension 52 in the vertical direction, and L4mm is between 0.1mm and 0.6mm.

[0065] For example, L4mm can be 0.1mm, 0.15mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, etc. Of course, this embodiment is merely an example of a specific value for L4mm, and does not limit it. Those skilled in the art can modify it according to actual circumstances, as long as the same technical effect is achieved.

[0066] By limiting L4mm within a certain range, this embodiment ensures that the protrusion 53 can intercept upwardly bent tabs, preventing them from contacting the connecting plate 2. Simultaneously, it prevents the protrusion 53 from being too thick, thus avoiding compression of the battery cell and capacity decay due to cell deformation, and ensuring efficient battery space utilization. If L4mm is too small, the protrusion 53 will be too thin to block the tabs; if L4mm is too large, the protrusion 53 will be too thick, compressing the battery cell space and reducing the battery's energy density.

[0067] Secondly, this utility model also provides a power battery, which includes: The housing assembly as described in any of the above embodiments has an internal receiving cavity; The battery cell is housed in the receiving cavity; the battery cell is connected to the terminal assembly 3 in the housing assembly.

[0068] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A housing assembly, characterized in that, include: The outer casing (1) has a through hole (11); A connecting plate (2) is disposed in the through hole (11), and the connecting plate (2) is provided with a mounting hole (21). A pole post assembly (3), a portion of which is embedded in the mounting hole (21), and another portion of which overlaps the connecting plate (2); A first insulating element (5) is disposed at the bottom of the connecting plate (2); the first insulating element (5) extends into the mounting hole (21) in a direction close to the pole assembly (3).

2. The housing assembly according to claim 1, characterized in that, The first insulating member (5) extends into the mounting hole (21) and abuts against the pole assembly (3), such that the first insulating member (5) and the pole assembly (3) cover the inner edge of the mounting hole (21).

3. The housing assembly according to claim 2, characterized in that, The first insulating element (5) includes: The main body (51) is disposed at the bottom of the connecting plate (2); An extension (52) is provided, one side of which is connected to one side of the main body (51), and the other side of which extends into the mounting hole (21) and abuts against the pole assembly (3). Along the horizontal direction, the length of the extension (52) is L1mm, which is between 0.3mm and 1.5mm.

4. The housing assembly according to claim 3, characterized in that, In the vertical direction, the thickness of the extension (52) is L2mm, which is between 0.2mm and 1.3mm.

5. The housing assembly according to claim 3, characterized in that, In the vertical direction, the overlap distance between the extension (52) and the pole assembly (3) is L3mm, where L3mm is between 0.2mm and 0.8mm.

6. The housing assembly according to claim 3, characterized in that, The extension (52) and the pole assembly (3) are spaced apart along the vertical direction.

7. The housing assembly according to claim 5, characterized in that, The ratio between the overlap distance and the thickness of the extension (52) is L3 / L2, where L3 / L2 is between 0.2 and 0.

8.

8. The housing assembly according to any one of claims 3 to 6, characterized in that, The pole assembly (3) includes: A pressure ring (32) is disposed on the connecting plate (2); the pressure ring (32) is provided with an opening; The pole body (31) extends into the opening; the top circumferential part of the pole body (31) is connected to the pressure ring (32); the bottom side of the pole body (31) abuts against the extension (52).

9. The housing assembly according to claim 8, characterized in that, The extension (52) surrounds the outer circumference of the pole body (31).

10. The housing assembly according to claim 8, characterized in that, The pole body (31) and the connecting plate (2) surround and form a receiving gap (6), in which a second insulating element (4) is provided.

11. The housing assembly according to claim 10, characterized in that, There is a gap between the second insulating member (4) and the upper surface of the extension (52).

12. The housing assembly according to claim 10, characterized in that, The second insulating member (4) abuts against the upper surface of the extension (52).

13. The housing assembly according to any one of claims 10 to 12, characterized in that, The inner edge of the connecting plate (2) is provided with a rib (22) at the top, and the second insulating member (4) is provided with a groove suitable for the rib (22) to be embedded.

14. The housing assembly according to any one of claims 3 to 7, characterized in that, The first insulating element (5) further includes: A protrusion (53) is provided on the bottom end face of the body part (51); in the vertical direction, the protrusion (53) is closer to the cell than the extension (52).

15. The housing assembly according to claim 14, characterized in that, In the vertical direction, the protrusion (53) protrudes by a thickness of L4mm relative to the extension (52), and L4mm is between 0.1mm and 0.6mm.

16. A power battery, characterized in that, include: The housing assembly as described in any one of claims 1 to 15 has an internal receiving cavity; The battery cell is disposed in the receiving cavity; the battery cell is connected to the terminal assembly (3) in the housing assembly.

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