Battery pack box and battery pack

Abstract

The application discloses a battery pack box body and a battery pack. The battery pack box body comprises an upper box cover and a lower box body. The upper box cover comprises a first wall, and the lower box body comprises a second wall. The first wall and the second wall are oppositely arranged and fixedly connected. A sealing layer comprises a connecting portion and a first protruding portion. The connecting portion is fixedly connected between the first wall and the second wall. The first protruding portion protrudes from the fixed connection region of the first wall and the second wall and forms a protrusion towards the inside of the box body. In the thickness direction of the sealing layer, the thickness of the first protruding portion is L1, and the thickness of the connecting portion is L2. The range of L1-L2 is 0.02mm-9.8mm. The sealing structure is formed on the side towards the inside of the box body through the structure of the connecting portion and the first protruding portion, a double sealing barrier is formed, and the invasion of external impurities into the box body through the installation gap is effectively prevented, thereby improving the sealing performance and reliability of the box body.

Description

Technical Field

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

[0002] Effective sealing of the battery pack enclosure is fundamental to the stable operation of the internal battery pack and electrical components. Currently, to ensure the sealing effect, sealant is applied to the mounting surfaces of the cover and enclosure, and further secured with bolts. However, the installation of bolts requires holes in the cover, enclosure, and sealant, which creates installation gaps. External impurities can then enter the enclosure through these gaps, compromising the sealing effect. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a battery pack housing and a battery pack to optimize the sealing effect of the housing and improve the operational stability of the internal structure of the housing.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A battery pack housing, comprising:

[0006] The upper box cover and the lower box body are provided. The upper box cover includes a first wall and the lower box body includes a second wall. The first wall and the second wall are arranged facing each other and are fixedly connected.

[0007] The sealing layer includes a connecting part and a first protrusion. The connecting part is pressed and fixed between the first wall and the second wall. The first protrusion extends based on the pressing area of ​​the first wall and the second wall and forms a protrusion towards the inside of the box. Along the thickness direction of the sealing layer, the thickness of the first protrusion is L1 and the thickness of the connecting part is L2. Then the range of L1-L2 is 0.02mm-9.8mm.

[0008] As can be seen from the above technical solution, one aspect of this disclosure provides a battery pack housing, which includes an upper cover and a lower housing. The upper cover includes a first wall, and the lower housing includes a second wall. The first wall and the second wall are arranged facing each other and fixedly connected. A sealing layer is provided in the assembly gap between the first wall and the second wall. The sealing layer specifically includes a connecting part and a first protrusion. The connecting part is pressed between the first wall and the second wall to form the main sealing structure, and the first protrusion is formed by protruding towards the interior of the housing based on the pressing area of ​​the first wall and the second wall. Along the thickness direction of the sealing layer, the thickness of the first protrusion is greater than that of the connecting part, forming a thickened sealing structure in a dedicated area inside the casing from the connection gap between the first and second walls. Based on this, along the thickness direction of the sealing layer, the thickness of the first protrusion is L1, and the thickness of the connecting part is L2. The range of L1-L2 is 0.02mm-9.8mm. This limitation on the difference between L1 and L2 ensures that the first protrusion maintains a stable sealing effect, reduces the risk of failure, and avoids waste of the sealing structure and excessive placement within the casing space. This structure, through the cooperation of the connecting part and the first protrusion, forms a multi-level sealing barrier to prevent external impurities from entering the casing. The connecting part first forms a basic sealing structure layer in the pressing area, while the first protrusion constructs a second sealing structure layer inside the casing, allowing impurities that penetrate the connecting part to be blocked by the first protrusion, thus improving the sealing performance of the battery pack casing. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0010] Figure 1 This is a schematic diagram of the battery pack housing structure provided in one embodiment of the present utility model;

[0011] Figure 2 This is an exploded view of the battery pack housing structure provided in an embodiment of the present invention;

[0012] Figure 3 This is a side cross-sectional view of the battery pack housing according to an embodiment of the present invention;

[0013] Figure 4 This is a front view of the battery pack housing according to an embodiment of the present invention;

[0014] Figure 5 for Figure 4 Detailed map of area A in the document;

[0015] Figure 6 A schematic diagram of a sealing layer structure with a second protrusion;

[0016] Figure 7 A schematic diagram of the first wall structure with a bend.

[0017] Figure 8 A schematic diagram of a structure with an adhesive layer around the mounting component.

[0018] in:

[0019] 10-First wall; 110-Bending part; 20-Second wall; 30-Sealing layer; 310-Connecting part; 320-First protrusion; 330-Second protrusion; 40-Mounting hole; 50-Mounting component; 60-Adhesive layer; 710-Upper box cover; 720-Lower box body. Detailed Implementation

[0020] The core of this application is to disclose a battery pack housing and a battery pack, so as to optimize the sealing effect of the housing and improve the operational stability of the internal structure of the housing.

[0021] To enable those skilled in the art to better understand the present application, embodiments of the present application will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model described in the claims. Additionally, the complete content of the structures represented in the following embodiments is not limited to those necessary for the solution of the utility model described in the claims.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, one aspect of this disclosure provides a battery pack housing. It should be noted that the battery pack housing refers to a closed or semi-closed structure made of materials such as metal and plastic. It provides installation space for battery packs, BMS, cooling systems, electrical connection components, etc., and fixes these components in the battery pack housing through reasonable structural design to ensure that they maintain a relatively stable position during battery pack operation and avoid damage to components or loosening of connections due to vibration, impact, or other factors.

[0023] The battery pack housing includes an upper cover 710 and a lower housing 720. The lower housing 720 includes a bottom plate and a side plate connected to and surrounding the bottom plate. The upper cover 710 is connected to the side plate and includes a cover plate opposite to the bottom plate. The upper cover 710 and the lower housing 720 together enclose a receiving chamber.

[0024] The upper cover 710 is a sealing component used to cover the cavity of the battery pack housing, encapsulating the battery pack inside the cavity and isolating it from the outside world to prevent external moisture and dust from affecting the battery module.

[0025] The top cover 710 can be made of non-metallic materials, such as any polymer compound used as a raw material for plastic products, i.e., resin. Commonly used resins include polyphenylene sulfide resin (PPS), polyphenylene sulfide resin (PPO), and polypropylene resin (PP). Alternatively, it can be made of composite materials including reinforcing agents and resins; commonly used reinforcing agents include glass fiber, carbon fiber, and graphite fiber. It can also be made of metallic materials, such as iron, aluminum, aluminum alloys, iron alloys, and stainless steel. Furthermore, the top cover 710 can be in various shapes, such as rectangular or circular, depending on the specific requirements.

[0026] The battery pack casing can be cast from materials such as steel plates and aluminum alloys, or made from lightweight materials such as glass fiber reinforced composite materials and carbon fiber reinforced composite materials.

[0027] The battery pack housing can be cylindrical, cuboid, cube, etc.

[0028] In the battery pack housing provided in the embodiments of this disclosure, the battery pack housing includes an upper cover 710 and a lower housing 720. The upper cover 710 includes a first wall 10, and the lower housing 720 includes a second wall 20. The first wall 10 and the second wall 20 are arranged facing each other and are spaced apart when the upper cover 710 and the lower housing 720 are closed. They are fixedly connected by a connector. At the same time, a sealing structure is provided in the assembly gap between the first wall 10 and the second wall 20.

[0029] The sealing layer 30 forms a sealing structure between the first wall 10 and the second wall 20. It mainly includes a connecting portion 310 and a first protrusion 320. The connecting portion 310 is pressed and fixed between the first wall 10 and the second wall 20, while the first protrusion 320 is based on the pressed area of ​​the first wall 10 and the second wall 20 and forms a protruding structure towards the interior of the housing. That is, the sealing layer 30 is composed of the connecting portion 310 within the pressed area and the protruding portion extending into the interior of the housing. It can be integrally molded using flexible sealant, allowing the connecting portion 310 to seal the gap between the pressed areas of the first wall 10 and the second wall 20, while the first protrusion 320 forms a thickened sealing structure, directly sealing the gap between the first wall 10 and the second wall 20 inside the housing. Through the differentiated thickness design of the connecting portion 310 and the first protrusion 320 in the sealing layer 30, a main sealing barrier is formed in the pressed area, while the thickened protruding structure extending into the housing constructs a multi-level seal, eliminating installation gaps and enhancing the barrier effect against impurities.

[0030] It should be noted that when the connecting part 310 is pressed and fixed between the first wall 10 and the second wall 20, it means that the connecting part 310 is combined with the two walls by pressure or adhesive pressing. The first protrusion 320 protrudes from the pressing area and protrudes towards the inside of the box, which can be achieved by controlling the shape through molding or injection molding processes, so as to avoid the first protrusion 320 from collapsing and seeping into the inside of the box.

[0031] In order to improve the structural stability and sealing effect of the sealing layer 30, such as Figure 4 and Figure 5 As shown, in some embodiments of this disclosure, along the thickness direction of the sealing layer 30, the thickness of the first protrusion 320 is L1, and the thickness of the connecting portion 310 is L2. The range of L1-L2 is 0.02mm-9.8mm, specifically 0.02mm, 2mm, 4mm, 6mm, 8mm, or 9.8mm. It should be noted that the range of L1-L2 represents the thickness difference between the first protrusion 320 and the sealing layer 30. In the battery pack housing provided in this embodiment, the thickness of the connecting portion 310 (L2) is typically set according to the housing structure, i.e., determined by the distance between the first wall 10 and the second wall 20, while the thickness of the first protrusion 320 (L1) is set according to sealing requirements. In this embodiment, if the range of L1-L2 is less than 0.02mm, it means that the thickness of the first protrusion 320 is close to the thickness of the sealing layer 30. The sealing effect of the first protrusion 320 and the sealing layer 30 is similar. They cannot form a reinforced secondary sealing structure inside the box. There is a risk that even if a protrusion structure is set inside the box, the first protrusion 320 will also fail to seal when the connection 310 fails. If the range of L1-L2 is greater than 9.8mm, it means that the thickness of the first protrusion 320 is much greater than the thickness of the sealing layer 30. It can effectively seal the connection gap between the first wall 10 and the second wall 20 inside the box. However, the first protrusion 320 will lead to an excessive amount of sealing structure, resulting in cost waste. At the same time, the first protrusion 320 is a structure located inside the box. Its excessive thickness poses a risk that its shape is difficult to maintain, and it may deform or even fall off inside the box, affecting the stable operation of the battery pack and electrical components inside the box. Therefore, the range of L1-L2 is limited to 0.02mm-9.8mm to maintain the effective sealing of the first protrusion 320 inside the casing while reducing the use of redundant materials and lowering the installation cost of the battery pack casing, thus achieving a balance between performance and cost.

[0032] In some specific embodiments of this disclosure, the range of L1-L2 is further limited to 2mm-5mm, specifically 2mm, 3mm, 4mm, or 5mm. It should be noted that this embodiment further narrows the range of L1-L2. On the one hand, controlling the range of L1-L2 to be no less than 2mm ensures the thickness difference between the first protrusion 320 and the connecting portion 310, ensuring that the first protrusion 320 has sufficient thickness compared to the connecting portion 310, thus ensuring that the first protrusion 320 forms a stable auxiliary sealing structure inside the battery pack housing. On the other hand, controlling the range of L1-L2 to be no greater than 5mm improves the precision of the sealing layer 30, avoiding material waste due to excessive thickness of the first protrusion 320 and preventing issues with the internal space arrangement of the battery pack housing.

[0033] Furthermore, in some embodiments of this disclosure, the thickness L1 of the first protrusion 320 ranges from 0.2mm to 10mm, specifically 0.2mm, 2mm, 4mm, 6mm, 8mm, or 10mm, so that the first protrusion 320 has sufficient thickness to meet the sealing requirements for the gap between the first wall 10 and the second wall 20 inside the battery pack housing.

[0034] In other embodiments of this disclosure, the thickness L2 of the connecting portion 310 ranges from 0.18mm to 5mm, specifically 0.18mm, 2mm, 3mm, 4mm, or 5mm. It should be noted that the thickness L2 of the connecting portion 310 needs to effectively seal the installation gap between the first wall 10 and the second wall 20. It needs to be greater than 0.18mm to maintain the sealing strength and reduce the risk of sealing failure. At the same time, the thickness of the connecting portion 310 cannot be too large, i.e., it needs to be less than 5mm, thereby reducing the material consumption of the connecting portion 310, which occupies a large coverage area. It can also reduce the thickness requirement of the first protrusion 320, further saving the sealing cost of the battery pack housing.

[0035] Furthermore, based on the above embodiments, the sealing layer 30 forms a protrusion towards the inside of the housing through the first protrusion 320 to enhance the internal sealing effect. However, external impurities may still intrude into the connecting portion 310 through the outer gap of the pressing area of ​​the first wall 10 and the second wall 20, and further intrude into the housing. Therefore, as Figure 6 As shown, in some embodiments of this disclosure, the sealing layer 30 further includes a second protrusion 330. It should also be noted that the first protrusion 320 and the second protrusion 330 are located on opposite sides of the connecting portion 310. The second protrusion 330 extends based on the pressing area of ​​the first wall 10 and the second wall 20 and protrudes towards the outside of the housing. As a structure that is in direct contact with the external environment of the housing, the second protrusion 330 provides direct sealing protection against external impurities.

[0036] In some embodiments of this disclosure, the thickness L4 of the second protrusion 330 ranges from 0.2mm to 10mm, specifically 0.2mm, 2mm, 4mm, 6mm, 8mm, or 10mm. Similar to the first protrusion 320, the second protrusion 330 forms a protruding structure on the outside of the battery pack housing to protect the installation gap between the first wall 10 and the second wall 20 from the outside of the battery pack housing. The thickness L4 of the second protrusion 330 is limited to between 0.2mm and 10mm, so that the second protrusion 330 can form a protruding structure, thereby constituting an effective auxiliary sealing structure while reducing the material consumption of the sealing structure and improving the economy of the battery pack housing.

[0037] It should also be noted that the thickness of the second protrusion 330 may be the same as or different from that of the first protrusion 320, but the thickness of both the second protrusion 330 and the first protrusion 320 is greater than the thickness of the connecting portion 310, so that the second protrusion 330 can completely cover the installation gap on the outside of the first wall 10 and the second wall 20, thereby achieving a covering and sealing effect on the connecting portion 310.

[0038] The aforementioned structure extends outward from the outer side of the pressing area between the first wall 10 and the second wall 20, forming an outward convex structure. External impurities are isolated from the connection portion 310 between the first wall 10 and the second wall 20 due to the obstruction of the second protrusion 330. Meanwhile, the first protrusion 320 forms an inward convex structure inside the pressing area, preventing impurities that have entered the connection portion 310 area from penetrating into the interior of the housing. Through the synergistic effect of the protrusions on both sides of the connection portion 310, the protective range of the sealing layer 30 can be extended from the pressing area between the first wall 10 and the second wall 20 to both the inner and outer sides of the pressing area, thereby forming a more complete and effective sealing barrier at the installation interface.

[0039] To further optimize the above technical solutions, such as Figure 7 As shown, in some embodiments of this disclosure, the battery pack housing also includes a bent portion 110 for impurity isolation and protection of the second protrusion 330. It should be noted that, considering the movement path of impurities under gravity, the bent portion 110 is usually provided on the higher side of the first wall 10 and the second wall 20 in the vertical direction. The following description uses an embodiment in which the height of the first wall 10 in the vertical direction is higher than that of the second wall 20. In this embodiment, the bent portion 110 is provided on the side of the first wall 10 facing the outside of the housing, and the bending direction of the bent portion 110 is towards the second wall 20. Along the thickness direction of the sealing layer 30, the bent portion 110 covers the second protrusion 330.

[0040] Specifically, the bending portion 110 is configured as a structure that extends outward from the outer surface of the first wall 10 and then bends. Its bending angle based on the first wall 10 is 90°-120°, so as to meet the bending protection requirements while reducing the additional space occupied by the bending structure. Simultaneously, the bending direction of the bending portion 110 faces the second wall 20 and covers the second protrusion 330, forming a physical barrier to effectively protect the second protrusion 330. This not only prevents external impurities from directly contacting the second protrusion 330, but also avoids the risk of deformation or displacement of the second protrusion 330 due to direct external force, thereby improving the overall reliability and durability of the battery pack housing.

[0041] Based on the above embodiments, the extension length L5 of the bending portion 110 ranges from 2mm to 20mm, specifically 2mm, 7mm, 12mm, 17mm, 22mm, 27mm or 30mm. The bending portion 110 needs to have sufficient extension length to block impurities and effectively protect the second protrusion 330. At the same time, the bending portion 110 cannot be extended too long, which would result in an excessively long outer extension structure of the battery pack housing, thus posing a high risk of impact damage.

[0042] Furthermore, in some embodiments of this disclosure, the connecting portion 310 covers the entire pressing area along the extension direction of the pressing connection area. It should be noted that the boundary of the pressing area is limited to the contact surface range of the first wall 10 and the second wall 20, while the coverage of the connecting portion 310 completely covers the contact surface of the first wall 10 and the second wall 20. This provides a maximum extended sealing area at the contact surface of the first wall 10 and the second wall 20 in terms of the box thickness, eliminating any unsealed gaps that may exist in the pressing area and achieving optimal sealing of the box. Simultaneously, the connecting portion 310, which spans the contact surface of the first wall 10 and the second wall 20, can provide a comprehensive support base for the first protrusion 320 and the second protrusion 330. That is, the first protrusion 320 and the second protrusion 330 can be positioned at any location within the box sealing area, and both have the connecting portion 310 as a support base, thus allowing for greater structural freedom.

[0043] Furthermore, it should be noted that the connecting portion 310, which spans the contact surface between the first wall 10 and the second wall 20, ensures that the compressive force of the first wall 10 and the second wall 20 does not have any suspended areas, but can be fully applied to the structure of the connecting portion 310, thereby improving the stress distribution of the sealing layer 30 and avoiding the sealing failure problem caused by local stress concentration.

[0044] Furthermore, in the battery pack housing provided in the embodiments of this disclosure, the connection between the first wall 10 and the second wall 20, and the sealing layer 30 between them, can be achieved by bolting, riveting, bonding, or welding. In some embodiments of this disclosure, mounting holes 40 are correspondingly provided on the first wall 10 and the second wall 20 in the battery pack housing. Here, "correspondingly provided" specifically means that the mounting holes 40 on the first wall 10 and the second wall 20 are one-to-one and coaxially arranged, so that a single mounting component 50 can pass through and fix a pair of mounting holes 40, and avoid gaps between the mounting component 50 and the hole wall due to hole misalignment.

[0045] Meanwhile, the mounting part 50 passes through the connecting part 310, that is, the area on the battery pack housing where the mounting hole 40 and the mounting part 50 are provided is covered by the connecting part 310. This allows the material of the connecting part 310 to be squeezed into the gap between the inner wall of the mounting hole 40 and the mounting part 50 during the pressing process, thereby completely filling and sealing the area of ​​the mounting hole 40 and reducing the risk of impurities entering from the mounting gap between the mounting part 50 and the mounting hole 40 and damaging the sealing layer 30.

[0046] Based on the above embodiments, in order to improve the sealing reliability of the battery pack housing with mounting component 50, such as Figure 5 As shown, in some embodiments of this disclosure, the distance between the first protrusion 320 and the mounting member 50 is L3, while the range of L1 / L3 is 0.006-5, specifically 0.006, 1.5, 3, 4.5, or 5. It should be noted that the mounting member 50 is essentially the risk area for external impurities to enter the casing. The thickness of the first protrusion 320 needs to be set according to its distance from the casing, i.e., the distance between the first protrusion 320 and the casing. Therefore, if the range of L1 / L3 is less than 0.006, the thickness of the first protrusion 320 is too thin based on the current distance between the mounting member 50 and the casing, posing a risk of failing to meet sealing requirements. Conversely, if the range of L1 / L3 is greater than 5, the first protrusion 320 has a large redundant structure, increasing material costs and causing space occupation within the casing, affecting the battery structure arrangement inside the casing. Therefore, by limiting the range of L1 / L3 to 0.006-5, the installation position of the mounting member 50 can be restricted on the basis of the effective sealing of the first protrusion 320. In the battery pack housing where the mounting member 50 is installed, the first protrusion 320 can achieve effective sealing of the inside of the housing, while reducing material waste of the sealing structure and reducing sealing costs.

[0047] In some embodiments of this disclosure, the range of L1 / L3 is further limited to 0.16-3, specifically 0.16, 0.25 or 0.3. This can further avoid the risk of sealing failure due to the thickness of the first protrusion 320 being too thin, and also reduce the structural redundancy of the first protrusion 320, reduce material consumption and the space occupied inside the battery pack housing.

[0048] Furthermore, in some embodiments of this disclosure, the distance L3 between the first protrusion 320 and the mounting member 50 ranges from 2mm to 30mm, specifically 2mm, 10mm, 20mm, or 30mm. If the distance between the first protrusion 320 and the mounting member 50 is too close, leakage gaps at the mounting member 50 location will more easily affect the first protrusion 320, increasing the risk of sealing failure at the first protrusion 320 location. Conversely, if the distance between the first protrusion 320 and the mounting member 50 is too large, the locking force of the mounting member 50 on the first protrusion 320 area will be weaker, resulting in a greater risk of separation between the first wall 10 and the second wall 20 at the first protrusion 320 location, leading to connection failure of the first wall 10 and the second wall 20 at the first protrusion 320 location and compromising the sealing performance of the battery pack housing. Therefore, the distance L3 between the first protrusion 320 and the mounting member 50 is limited to a range of 2mm to 30mm to balance the sealing stability and structural connection strength at the first protrusion 320 location.

[0049] Based on the above embodiments, the distance L3 between the first protrusion 320 and the mounting member 50 is further limited to 10mm-20mm, specifically 10mm, 14mm, 16mm, 18mm or 20mm. This can further refine the structural design of the battery pack housing, ensuring that the sealing strength at the position of the first protrusion 320 meets the requirements, and ensuring the connection strength requirements of the first wall 10 and the second wall 20 at the position of the first protrusion 320.

[0050] Furthermore, considering that the area between the mounting component 50 and the mounting hole 40 has a greater risk of seal failure compared to other areas of the first wall 10 and the second wall 20, therefore... Figure 8As shown, in some embodiments of this disclosure, an adhesive layer 60 is provided on the outer periphery of the area where the mounting member 50 passes through the mounting hole 40, and the adhesive layer 60 is interference-filled between the inner wall of the mounting hole 40 and the outer wall of the mounting member 50. Specifically, the adhesive layer 60 can be configured as an annular structure and surround the outer peripheral surface of the mounting member 50, with its radial dimension being larger than the gap dimension between the inner wall of the mounting hole 40 and the outer wall of the mounting member 50. When the mounting member 50 is inserted into the mounting hole 40, the adhesive layer 60 is subjected to radial compression and generates elastic deformation, thereby achieving interference filling of the gap. It should also be noted that the adhesive layer 60 and the sealing layer 30 can form a complementary sealing structure. The sealing layer 30 covers the pressing area of ​​the first wall 10 and the second wall 20, while the adhesive layer 60 seals the gap between the mounting hole 40 and the mounting member 50. Together, they block the intrusion path of external impurities into the battery pack housing, thereby improving the sealing effect of the battery pack housing.

[0051] In some embodiments of this disclosure, along the thickness direction of the housing, the span of the connecting portion 310 covers at least 2 / 3 of the span of the pressing connection area between the first wall 10 and the second wall 20. The covering direction of the connecting portion 310 is along the thickness direction of the housing, extending from the inside of the housing outwards. This allows one side of the connecting portion 310 to form a connection structure with the first protrusion 320, while providing sufficient coverage area as it extends outwards to meet sealing requirements. It should also be noted that the mounting member 50 is disposed within the coverage area of ​​the connecting portion 310, forming a sealing structure around the mounting member 50, thus ensuring the sealing effect of the battery pack housing.

[0052] Furthermore, in the battery pack housing provided in this embodiment, if the material of the sealing layer 30 does not have sufficient flexibility and environmental adaptability, the sealing structure may crack or fail under long-term deformation or changes in the external environment, thereby affecting the overall sealing performance of the housing. Therefore, the sealing layer 30 provided in this embodiment is a flexible structural layer, which can be formed by one or a combination of silicone sealant, polyurethane sealant, and polysulfide sealant.

[0053] Other aspects of this disclosure also provide a battery pack, which includes a battery pack housing provided in any of the above embodiments, and a battery pack disposed within the battery pack housing. It should also be noted that since the battery pack housing has the technical effects provided in any of the above embodiments, the battery pack also has the technical effects provided in any of the above embodiments, and will not be repeated here.

[0054] The terms "first," "second," "left side," and "right side," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units may not be defined in the listed steps or units, but may include steps or units not listed.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack housing, characterized in that, include: The upper box cover (710) and the lower box body (720) are provided. The upper box cover (710) includes a first wall (10) and the lower box body (720) includes a second wall (20). The first wall (10) and the second wall (20) are arranged facing each other and fixedly connected. The sealing layer (30) includes a connecting portion (310) and a first protrusion (320). The connecting portion (310) is pressed and fixed between the first wall (10) and the second wall (20). The first protrusion (320) extends based on the pressing area of ​​the first wall (10) and the second wall (20) and forms a protrusion towards the inside of the box. Along the thickness direction of the sealing layer (30), the thickness of the first protrusion (320) is L1 and the thickness of the connecting portion (310) is L2. The range of L1-L2 is 0.02mm-9.8mm.

2. The battery pack housing as described in claim 1, characterized in that, The range of L1-L2 is 2mm-5mm.

3. The battery pack housing as described in claim 1, characterized in that, The thickness L1 of the first protrusion (320) ranges from 0.2mm to 10mm.

4. The battery pack housing as described in claim 1, characterized in that, The thickness L2 of the connecting part (310) ranges from 0.18mm to 5mm.

5. The battery pack housing as described in claim 1, characterized in that, The sealing layer (30) further includes a second protrusion (330), the first protrusion (320) and the second protrusion (330) are located on opposite sides of the connecting portion (310), and the second protrusion (330) extends based on the pressing area of ​​the first wall (10) and the second wall (20) and forms a protrusion towards the outside of the box.

6. The battery pack housing as described in claim 5, characterized in that, Along the thickness direction of the sealing layer (30), the thickness L4 of the second protrusion (330) ranges from 0.2 mm to 10 mm.

7. The battery pack housing as described in claim 5, characterized in that, The first wall (10) extends outward from the side of the box body and is provided with a bent part (110), the bending direction of the bent part (110) is towards the second wall (20); along the thickness direction of the sealing layer (30), the bent part (110) covers the second protrusion (330).

8. The battery pack housing as described in claim 7, characterized in that, The extension length L5 of the bent portion (110) ranges from 2mm to 20mm.

9. The battery pack housing as described in claim 5, characterized in that, The connecting part (310) completely covers the pressing connection area of ​​the first wall (10) and the second wall (20).

10. The battery pack housing as described in claim 1, characterized in that, Mounting holes (40) are provided on the first wall (10) and the second wall (20) respectively, and are fixedly connected by mounting parts (50), which pass through the connecting part (310).

11. The battery pack housing as described in claim 10, characterized in that, The distance between the first protrusion (320) and the mounting member (50) is L3, and the range of L1 / L3 is 0.006-5.

12. The battery pack housing as described in claim 11, characterized in that, The L1 / L3 ratio ranges from 0.16 to 3.

13. The battery pack housing as described in claim 11, characterized in that, The distance L3 between the first protrusion (320) and the mounting member (50) ranges from 2mm to 30mm.

14. The battery pack housing as described in claim 11, characterized in that, The distance L3 between the first protrusion (320) and the mounting member (50) ranges from 10mm to 20mm.

15. The battery pack housing as described in claim 10, characterized in that, An adhesive layer (60) is provided on the outer periphery of the area through the mounting hole (40) of the mounting member (50), and the adhesive layer (60) is filled between the inner wall of the mounting hole (40) and the outer wall of the mounting member (50).

16. The battery pack housing as described in claim 10, characterized in that, Along the thickness direction of the housing, the span of the connecting part (310) covers at least 2 / 3 of the span of the pressed connection area of ​​the first wall (10) and the second wall (20).

17. A battery pack, characterized in that, Includes the battery pack housing as described in any one of claims 1-16.

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