Battery pack and electric device

Abstract

The embodiment of the application relates to the battery field, and specifically provides a battery pack and an electric equipment, the battery pack at least comprising a box body, a fixing beam and a flow guide part, the fixing beam and the flow guide part being fixedly arranged on the same side surface of the box body, and the fixing beam being provided with a fixing hole, a fixing bush being fixedly arranged in the fixing hole, and the fixing bush being provided with a mounting through hole for the fixing member to pass through; wherein the flow guide part has a flow guide inlet and a flow guide outlet, the upper end surface of the fixing bush is provided with a blocking piece, the blocking piece is circumferentially arranged on the outer side of the mounting through hole, and the top surface of the blocking piece is used for abutting the bottom surface of the mounting part. The blocking piece can effectively prevent high-salt and high-humidity salt mist from entering the inside of the mounting through hole, thereby effectively preventing the salt mist from causing rust on the outer surface of the fixing member in the mounting through hole, so that the structural strength of the fixing member can be effectively ensured, and the fixing structure stability of the battery pack of the embodiment of the application is further ensured.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to a battery pack and an electrical device. Background Technology

[0002] Battery packs store electrical energy and discharge it, playing a significant role in various aspects of modern life. In high-salt environments such as seasides, salt lakes, and saline-alkali lands, the air often contains high levels of sodium chloride and is highly humid due to water evaporation and wind action; this environment is known as salt fog. Since battery packs need to be mounted on electrical equipment such as electric vehicles using fasteners, severe corrosion of these fasteners can significantly reduce their structural strength, affecting the stability of the mounting structure. Utility Model Content

[0003] In view of this, the present application aims to provide a battery pack and electrical equipment to solve the technical problem in the prior art where the fixing parts of the battery are easily corroded by salt spray, resulting in a significant reduction in structural strength and affecting normal use.

[0004] The first aspect of this application provides a battery pack, including a housing, a fixing beam, and a flow guide. The fixing beam and the flow guide are fixedly disposed on the same side of the housing, and the fixing beam is provided with a fixing hole. A fixing bushing is fixedly disposed in the fixing hole, and the fixing bushing has a mounting through hole for a fixing member to pass through. The flow guide has a flow inlet and a flow outlet. A barrier is disposed on the upper end surface of the fixing bushing. The barrier is disposed around the circumferential outside of the mounting through hole, and the top surface of the barrier is used to fit against the bottom surface of the mounting part.

[0005] Another aspect of this application provides an electrical device including the aforementioned battery pack.

[0006] After the battery pack of this embodiment is installed, the barrier on the upper end face of the fixing bushing can fit tightly with the mounting part, thereby sealing the gap between the upper end face of the fixing bushing and the mounting part. Furthermore, the mounting part abuts against the fixing beam at its bottom end, effectively sealing the lower opening of the mounting through hole, thus sealing both the upper and lower openings of the mounting through hole. When the battery pack of this embodiment is applied to a high-salt, high-humidity environment with salt spray, and the guide part with a guide inlet and a guide outlet is fixedly mounted on the same side of the housing as the fixing beam, the barrier can effectively prevent high-salt, high-humidity salt spray from entering the mounting through hole. This effectively prevents the salt spray from corroding the outer surface of the fixing part inside the mounting through hole, thus effectively ensuring the structural strength of the fixing part and consequently ensuring the stability of the fixing structure of the battery pack of this embodiment. Attached Figure Description

[0007] It should be understood that the following figures only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0008] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0009] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0010] Figure 1 This is a partial perspective view of the battery pack according to an embodiment of this application.

[0011] Figure 2 This is a top view of the battery pack according to an embodiment of this application.

[0012] Figure 3 This is a partial cross-sectional schematic diagram of the battery pack according to an embodiment of this application.

[0013] Figure 4 This is a partial cross-sectional schematic diagram of the battery pack according to an embodiment of this application.

[0014] Figure 5 This is a partial top view of the battery pack according to an embodiment of this application.

[0015] Attached image labels: 10. Box body; 20. Fixed beam; 21. Fixed hole; 22. Fixed bushing; 221. Mounting through hole; 222. Receiving groove; 23. Upper beam plate; 24. Lower beam plate; 25. Sealing part; 26. Welding part; 31. Barrier component; 32. Fixing component; 40. Flow channel plate; 50. Flow guide part; 51. Flow guide inlet; 52. Flow guide outlet. Detailed Implementation

[0016] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] like Figures 1 to 5As shown, this application embodiment provides a battery pack, which includes at least a housing 10 and a fixing beam 20. The fixing beam 20 is fixedly disposed on the side of the housing 10 and is used to fix the battery pack of this application embodiment in its installation position.

[0019] Specifically, the housing 10 includes a base plate and a frame fixed to the outer periphery of the base plate, with the base plate and frame forming a receiving cavity. The receiving cavity is used to accommodate various structures required for the battery pack. The battery pack in this embodiment can be a battery group composed of multiple battery cells connected in series and / or parallel, a battery management system (BMS), a thermal management system, an electrical connection system (which may include high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (shell, brackets, etc.), and protective components, etc. These components are placed inside the housing 10 and sealed with a cover plate, forming a complete functional unit capable of directly outputting electrical energy. As a rechargeable battery, the battery pack can serve as a power source for electrical equipment such as new energy vehicles. Specifically, the aforementioned housing 10 can be a closed or semi-closed structure made of materials such as metal or plastic, serving as the physical carrier of the battery pack. Its design and manufacturing must meet the safety, reliability, and functional requirements of the battery pack under different usage scenarios. The enclosure 10 provides installation space for the battery pack, BMS, cooling system, electrical connection components, etc., and through reasonable structural design, these components are fixed inside the enclosure 10 to ensure that they maintain a relatively stable position during battery pack operation, and to avoid damage to components or loosening of connections due to vibration, impact or other factors.

[0020] The housing 10 may include a lower housing 10 and an upper housing 10. The lower housing 10 includes a base plate and a frame connecting to and surrounding the base plate. The upper housing 10 is connected to the frame and has a top plate opposite to the base plate. The upper and lower housings together form a receiving cavity. The frame and base plate can be integrally formed or processed separately and then fixedly connected. Specifically, the frame and base plate are fixedly connected by welding, riveting, screwing, etc. When the housing 10 is a cube, the frame of the lower housing 10 generally has four side plates surrounding the periphery of the base plate. In other embodiments, the shape of the housing 10 can also be a cylinder or other shapes. The frame mainly serves to support, protect, and connect. The frame can be formed by splicing multiple beams together. The frame can be rectangular, circular, polygonal, etc., without limitation. The frame can be made of various materials, such as aluminum alloy, copper alloy, steel, plastic, etc. The beams of the frame can be solid or contain cavities. The base plate is the main load-bearing component of the battery pack, used to support and secure the internal battery pack components such as the battery group, battery management system, and cooling system. The base plate is located at the bottom of the frame of the housing 10 and can be fixed to the bottom of the frame by welding, riveting, or screwing. The base plate can be rectangular, circular, polygonal, or a plate-like structure; its specific shape is not limited, and its dimensions are determined by the number and size of the battery cells housed in the battery pack. The housing 10 can be cast from materials such as steel or aluminum alloy, or made from lightweight materials such as glass fiber reinforced composite materials or carbon fiber reinforced composite materials.

[0021] Specifically, the battery pack is disposed within a receiving cavity. Specifically, multiple battery cells with comparable capacity and internal resistance can be connected in series or parallel to form a battery pack. Each battery cell includes at least a housing and a cover fixedly connected to each other. It is understood that the battery cell in this embodiment may also include a cell and an electrolyte. The housing and cover are used together to contain the cell and electrolyte. The cover may have at least one positive electrode post and at least one negative electrode post for electrical connection to the outside. The cell includes one or more electrode assemblies, which are formed by stacking or winding positive electrode plates, negative electrode plates, and a separator. The separator is located between adjacent positive and negative electrode plates to insulate them. At least one end of the electrode assembly has a tab, one end of which is electrically connected to the tab, and the other end is electrically connected to the electrode post.

[0022] It is understood that the battery cells in the embodiments of this application can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and are not limited thereto. The battery cells can store chemical energy and controllably convert this chemical energy into electrical energy. For recyclable battery cells, the active materials can be activated by charging after discharge, allowing for continued use.

[0023] like Figure 1 and Figure 2 As shown, the fixed beam 20 of this application embodiment is provided with a fixed hole 21, and a fixed bushing 22 is fixedly provided in the fixed hole 21. The fixed bushing 22 has an installation through hole 221 for the fastener 32 to pass through; that is, the battery pack can be fixed to the mounting part by the fastener 32 passing through the installation through hole 221.

[0024] Therefore, during the assembly process of the battery pack in this embodiment, it is necessary to fix the fixing beam 20 to the side of the housing 10 and fix the fixing bushing 22 in the fixing hole 21 of the fixing beam 20. During the installation process of the battery pack in this embodiment, the fixing member 32 can pass through the mounting through hole 221 of the fixing bushing 22, with one end fixed to the mounting part corresponding to the battery pack and the other end abutting against the fixing beam 20, thereby fixing the battery pack of this embodiment to the mounting part.

[0025] by Figure 3 Taking the middle direction as an example, the fastener 32 can pass through the mounting through hole 221 of the fixing bushing 22 from bottom to top, the top end is fixed to the mounting part corresponding to the battery pack, and the bottom end abuts against the fixing beam 20, thereby fixing the battery pack of this embodiment to the mounting part in a suspended manner.

[0026] like Figure 1 As shown, the battery pack in this embodiment of the application further includes a flow guide 50; the flow guide 50 and the fixed beam 20 are fixedly disposed on the same side of the housing 10, and have a flow inlet 51 and a flow outlet 52. Therefore, during the operation of the battery pack in this embodiment of the application, the heat exchange liquid can flow in from the flow inlet 51 of the flow guide 50, flow through the flow channel plate 40 and other structures, and then flow out from the flow outlet 52 of the flow guide 50. It is understood that during the operation of the battery pack in this embodiment of the application, the humidity is usually higher in the vicinity of the flow guide 50 compared to other locations, and the corrosion effect of salt spray on the structure at that location is stronger.

[0027] Therefore, as Figure 1 and Figure 3 As shown, in one embodiment of this application, a barrier 31 is provided on the upper end surface of the fixing bushing 22. The barrier 31 is arranged around the circumferential outer side of the mounting through hole 221, and the top surface of the barrier 31 is used to fit against the bottom surface of the mounting part.

[0028] Thus, after the battery pack of this embodiment is installed, the barrier 31 on the upper end face of the fixing bushing 22 can fit tightly with the mounting part, thereby blocking the gap between the upper end face of the fixing bushing 22 and the mounting part. Furthermore, the mounting part abuts against the fixing beam 20 through its bottom end, effectively blocking the lower opening of the mounting through hole 221, thereby sealing both the upper and lower openings of the mounting through hole 221. When the battery pack of this embodiment is applied to a high-salt and high-humidity environment with salt spray, when the guide part 50 with the guide inlet 51 and the guide outlet 52 is fixedly set on the same side of the housing 10 as the fixing beam 20, the barrier 31 can also effectively prevent the high-salt and high-humidity salt spray from entering the interior of the mounting through hole 221. This can effectively prevent the salt spray from corroding the outer surface of the fixing part 32 inside the mounting through hole 221, thereby effectively ensuring the structural strength of the fixing part 32 and thus ensuring the stability of the fixing structure of the battery pack of this embodiment.

[0029] like Figure 3 As shown, a receiving groove 222 is provided on the upper end surface of the fixed bushing 22. The receiving groove 222 is annular, and the corresponding annular barrier 31 is located within the receiving groove 222. By providing the receiving groove 222 on the upper end surface of the fixed bushing 22 to accommodate the barrier 31, the sliding of the barrier 31 relative to the fixed bushing 22 can be effectively prevented, ensuring that the barrier 31 is in a preset position, thereby ensuring its sealing effect.

[0030] like Figure 4 As shown, in one embodiment of this application, the radial width of the barrier 31 is A mm, where A mm satisfies 4 mm ≤ A mm ≤ 12 mm. When the radial width A mm of the barrier 31 is less than 4 mm, it is difficult to guarantee the barrier effect of the barrier 31 on the gap between the upper end face of the fixed bushing 22 and the mounting part, which can easily lead to poor sealing. When the radial width A mm of the barrier 31 is greater than 12 mm, the barrier 31 needs to occupy too much lateral space on the upper end face of the fixed bushing 22, which can not only affect other structural arrangements but also increase the material cost required for the barrier 31.

[0031] Therefore, when the radial width A mm of the barrier 31 satisfies 4 mm ≤ A mm ≤ 12 mm, it not only ensures the barrier effect of the barrier 31 on the gap between the upper end face of the fixed bushing 22 and the mounting part, but also does not affect other structural arrangements and effectively reduces the material cost required for the barrier 31. In specific embodiments, the radial width A mm of the barrier 31 can be selected from specific values ​​such as 4 mm, 5.2 mm, 6.5 mm, 7.1 mm, 8 mm, 8.9 mm, 9.8 mm, 10.5 mm, 11.3 mm, and 12 mm, and is not limited here.

[0032] like Figure 4 As shown, in one embodiment of this application, the axial thickness of the barrier 31 is L mm, where L mm satisfies 2 mm ≤ L mm ≤ 8 mm. When the axial thickness L mm of the barrier 31 is less than 2 mm, the barrier 31 has a poor blocking effect on the gap between the upper end face of the fixing bushing 22 and the mounting part, which easily leads to poor sealing. When the axial thickness L mm of the barrier 31 is greater than 8 mm, the barrier 31 needs to occupy too much longitudinal space on the upper end face of the fixing bushing 22, resulting in a larger distance between the fixing beam 20 and the mounting part, which affects the fixed installation of the battery pack and also increases the material cost required for the barrier 31.

[0033] Therefore, when the axial thickness L mm of the barrier 31 satisfies 2 mm ≤ L mm ≤ 8 mm, it can not only effectively improve the barrier effect of the barrier 31 on the gap between the upper end face of the fixing bushing 22 and the mounting part, but also effectively shorten the distance between the fixing beam 20 and the mounting part, facilitating the fixed installation of the battery pack, and effectively reducing the material cost required for the barrier 31. In specific embodiments, the axial thickness L mm of the barrier 31 can be selected from specific values ​​such as 2 mm, 2.5 mm, 3.3 mm, 4.2 mm, 5 mm, 5.8 mm, 6.5 mm, 7.1 mm, 7.8 mm, and 8 mm, and is not limited here.

[0034] like Figure 4 As shown, in one embodiment of this application, the height of the barrier 31 protruding from the upper surface of the fixed bushing 22 in the free state is N mm, where N mm satisfies 0.5 mm ≤ N mm ≤ 3 mm.

[0035] When the height N mm of the barrier 31 protruding from the upper end face of the fixing bushing 22 in the free state is less than 0.5 mm, the protrusion height of the barrier 31 is low. When the barrier 31 is subjected to pressure from behind, it is easy for the upper end face of the fixing bushing 22 to collide with the mounting part, which will also affect the barrier effect of the barrier 31. When the height N mm of the barrier 31 protruding from the upper end face of the fixing bushing 22 in the free state is greater than 3 mm, the barrier 31 needs to occupy too much longitudinal space on the upper end face of the fixing bushing 22, resulting in a large distance between the fixing beam 20 and the mounting part, which affects the fixed installation of the battery pack and also increases the material cost required for the barrier 31.

[0036] Therefore, when the height N mm of the barrier 31 protruding from the upper end face of the fixing bushing 22 in its free state satisfies 0.5 mm ≤ N mm ≤ 3 mm, it can effectively prevent the barrier 31 from being easily compressed from behind, which could cause collisions between the upper end face of the fixing bushing 22 and the mounting part, ensuring the barrier effect of the barrier 31. It can also effectively shorten the distance between the fixing beam 20 and the mounting part, facilitating the fixed installation of the battery pack, and effectively reducing the material cost required for the barrier 31. In specific embodiments, the height N mm of the barrier 31 protruding from the upper end face of the fixing bushing 22 in its free state can be selected from specific values ​​such as 2 mm, 2.5 mm, 3.3 mm, 4.2 mm, 5 mm, 5.8 mm, 6.5 mm, 7.1 mm, 7.8 mm, 8 mm, etc., and is not limited here.

[0037] like Figure 4 As shown, in one embodiment of this application, the depth of the receiving groove 222 is E mm, where E mm satisfies 1 mm ≤ E mm ≤ 5 mm. When the depth E mm of the receiving groove 222 is less than 1 mm, the receiving groove 222 has a low limiting ability for the blocking member 31. During installation or under long-term working conditions, the blocking member 31 is prone to slipping out of the receiving groove 222, affecting the blocking effect of the blocking member 31. When the depth E mm of the receiving groove 222 is greater than 5 mm, it will not only increase the processing difficulty of the receiving groove 222, but also increase the material cost required for the blocking member 31.

[0038] Therefore, when the depth E mm of the receiving groove 222 satisfies 1 mm ≤ E mm ≤ 5 mm, the limiting ability of the receiving groove 222 to restrict the barrier 31 can be effectively guaranteed, preventing the barrier 31 from sliding out of the receiving groove 222 and affecting the blocking effect of the barrier 31. This also effectively reduces the processing difficulty of the receiving groove 222 and the material cost required for the barrier 31. In specific embodiments, the depth E mm of the receiving groove 222 can be selected from specific values ​​such as 1 mm, 1.2 mm, 1.5 mm, 1.9 mm, 2.3 mm, 2.7 mm, 3.2 mm, 3.8 mm, 4.4 mm, and 5 mm, and is not limited here. In one embodiment of this application, the barrier 31 is a rubber part. When the barrier 31 is a rubber part, the barrier 31 has a certain elasticity, which can effectively seal the gap between the upper end face of the fixing bushing 22 and the mounting part, preventing high salt and high humidity salt spray from entering the mounting through hole 221 from the gap between the upper end face of the fixing bushing 22 and the mounting part, and also has good anti-salt spray performance itself.

[0039] like Figure 3As shown, in one embodiment of this application, the mounting through hole 221 is a circular through hole. When the mounting through hole 221 is a circular through hole, it is convenient to process the mounting through hole 221 on the fixing hole 21 of the fixing beam 20 and the mounting through hole 221 on the fixing bushing 22, thereby improving processing efficiency. In another embodiment of this application, the mounting through hole 221 can be a through hole of other shapes, which is not limited here.

[0040] Furthermore, in one embodiment of this application, the diameter of the mounting through hole 221 is D mm, where D mm satisfies 12 mm ≤ D mm ≤ 25 mm. When the mounting through hole 221 is a circular through hole, it facilitates the machining process of the mounting through hole 221 on the fixing hole 21 of the fixing beam 20 and the mounting through hole 221 on the fixing bushing 22.

[0041] When the diameter D mm of the mounting hole 221 is less than 12 mm, the size of the fastener 32 also needs to be reduced accordingly. However, with a smaller size, the fastener 32 is prone to deformation due to the weight of the entire battery pack over a long period of time, and may even detach from the mounting part, causing the battery pack to fall out of its mounting position. When the diameter D mm of the mounting hole 221 is greater than 12 mm, the fixing beam 20 and the fixing bushing 22 will occupy too much space, which will not only affect the layout of other structures, but also increase the material cost required for the fixing beam 20 and the fixing bushing 22.

[0042] Therefore, when the diameter D mm of the mounting through hole 221 satisfies 12 mm ≤ D mm ≤ 25 mm, it ensures that the fastener 32 has sufficient installation space, effectively guaranteeing its own dimensions and preventing deformation after long-term use. It also effectively saves space required for the fixing beam 20 and the fixing bushing 22, avoiding interference with other structural arrangements and effectively reducing the material cost of the fixing beam 20 and the fixing bushing 22. In specific embodiments, the diameter D mm of the mounting through hole 221 can be selected from specific values ​​such as 12 mm, 13.5 mm, 15.3 mm, 16.6 mm, 18.6 mm, 20.3 mm, 22.5 mm, 23.9 mm, 24.7 mm, and 25 mm, and is not limited here.

[0043] like Figure 4As shown, in one embodiment of this application, the distance between the inner edge of the barrier 31 and the mounting through hole 221 is B mm, where B mm satisfies 1 mm ≤ B mm ≤ 5 mm. When the distance B mm between the inner edge of the barrier 31 and the mounting through hole 221 is less than 1 mm, during the assembly process of the barrier 31, if the barrier 31 is partially misaligned, it is prone to overlap with the mounting through hole 221, thus preventing the fixing member 32 from passing through the mounting through hole 221 and being fixed to the mounting part. When the distance B mm between the inner edge of the barrier 31 and the mounting through hole 221 is greater than 1 mm, it will affect the maximum arrangable width of the barrier 31, thereby affecting the barrier 31's blocking effect on the gap between the upper end face of the fixing bushing 22 and the mounting part. Therefore, when the distance B mm between the inner edge of the barrier 31 and the mounting through hole 221 satisfies 1 mm ≤ B mm ≤ 5 mm, even if the barrier 31 is partially misaligned relative to its mounting position, it is not easy for it to overlap with the mounting through hole 221. This effectively prevents the barrier 31 from blocking the fastener 32 from passing through the mounting through hole 221, and also effectively ensures that the width of the barrier 31 meets the requirements, thereby ensuring the barrier 31's blocking effect on the gap between the upper end face of the fixing bushing 22 and the mounting part. In a specific embodiment, the distance B mm between the inner edge of the barrier 31 and the mounting through hole 221 can be selected from specific values ​​such as 1 mm, 1.2 mm, 1.5 mm, 1.9 mm, 2.4 mm, 3.2 mm, 3.8 mm, 4.3 mm, 4.7 mm, and 5 mm, and is not limited here.

[0044] like Figure 4 As shown, in one embodiment of this application, the distance between the outer edge of the barrier 31 and the outer edge of the upper end face of the fixing bushing 22 is C mm, where C mm satisfies 1 mm ≤ C mm ≤ 5 mm. When the distance C mm between the outer edge of the barrier 31 and the outer edge of the upper end face of the fixing bushing 22 is less than 1 mm, the area of ​​the entire barrier 31 is large, thereby increasing the material cost of the barrier 31. When the distance C mm between the outer edge of the barrier 31 and the outer edge of the upper end face of the fixing bushing 22 is greater than 5 mm, it will also affect the maximum arrangable width of the barrier 31, thereby affecting the blocking effect of the barrier 31 on the gap between the upper end face of the fixing bushing 22 and the mounting part.

[0045] Therefore, when the distance C mm between the outer edge of the barrier 31 and the outer edge of the upper end face of the fixing bushing 22 satisfies 1mm ≤ C mm ≤ 5mm, not only can the material cost of the barrier 31 be effectively saved, but the width of the barrier 31 can also be effectively guaranteed to meet the requirements, thereby ensuring the barrier 31's blocking effect on the gap between the upper end face of the fixing bushing 22 and the mounting part. In specific embodiments, the distance C mm between the outer edge of the barrier 31 and the outer edge of the upper end face of the fixing bushing 22 can be selected from specific values ​​such as 1mm, 1.1mm, 1.5mm, 2.0mm, 2.5mm, 3.1mm, 3.7mm, 4.2mm, 4.8mm, and 5mm, and is not limited here.

[0046] like Figure 1 As shown, in one embodiment of this application, a welded portion 26 is formed between the upper edge of the fixed bushing 22 and the fixed beam 20, that is, the upper end of the fixed bushing 22 is welded to the fixed beam 20 to ensure the fixing strength between the upper end of the fixed bushing 22 and the fixed beam 20.

[0047] Specifically, such as Figure 1 As shown, in one embodiment of this application, the welding portion 26 is distributed in a partial area of ​​the upper edge of the fixed bushing 22, that is, the welding portion 26 is a partially welded structure. This can improve the processing speed of the welding process between the fixed bushing 22 and the fixed beam 20 while ensuring the fixing strength between the upper end of the fixed bushing 22 and the fixed beam 20. In another embodiment of this application, the welding portion 26 is distributed in the entire area of ​​the upper edge of the fixed bushing 22. That is, the welding portion 26 is a fully welded structure, which can further improve the fixing strength between the upper end of the fixed bushing 22 and the fixed beam 20.

[0048] like Figure 1 As shown, the fixing beam 20 has a fixed end and an extension end. The fixed end is fixed to the side of the housing 10, and the fixing bushing 22 is disposed on the extension end, with the extension end being higher than the fixed end. Thus, after the battery pack in this embodiment is installed, the fixing beam 20 can suspend the battery pack at its installation position. The height of the housing 10 of the battery pack can be lower than the height of the installation part, effectively lowering the center of gravity of the battery pack. Furthermore, the battery pack does not easily affect the arrangement of other structures, leaving space for their placement.

[0049] Furthermore, such as Figure 1 and Figure 3As shown, in one embodiment of this application, the upper end face of the fixing bushing 22 is parallel to and higher than the upper surface of the housing 10; the extension direction of the fixing member 32 is perpendicular to the upper surface of the housing 10. Since the upper end face of the fixing bushing 22 is parallel to and higher than the upper surface of the housing 10, and the extension direction of the fixing member 32 is perpendicular to the upper surface of the housing 10, after the battery pack is installed in this embodiment, the battery pack can be suspended in its installation position using the fixing beam 20. Furthermore, the direction of the weight of the battery pack borne by the fixing member 32 is consistent with its own extension direction, thus ensuring that the fixing member 32 is only subjected to tensile force along its axial extension direction, and not to tensile force in the radial or other directions, thereby better ensuring the fixing strength of the fixing member 32.

[0050] like Figure 1 and Figure 3 As shown, in one embodiment of this application, the fixed beam 20 includes an upper beam plate 23 and a lower beam plate 24, which are fixedly connected and form a cavity; the fixed bushing 22 passes through the upper beam plate 23 and the lower beam plate 24. By using the fixed connection between the upper beam plate 23 and the lower beam plate 24 to form a fixed beam 20 with a cavity, the overall weight of the fixed beam 20 can be effectively reduced, thereby reducing the tensile force required to be borne by the fastener 32 and preventing significant deformation of the fastener 32 after long-term use; the fixed bushing 22 passing through the upper beam plate 23 and the lower beam plate 24 can effectively separate the mounting through hole 221 from the cavity of the fixed beam 20, and also helps the fixed bushing 22 maintain its own structural strength.

[0051] Furthermore, such as Figure 1 As shown, in one embodiment of this application, the upper beam plate 23 and the lower beam plate 24 form an opening at their extended ends; a sealing part 25 is provided over the opening, completely sealing the opening. By covering the opening formed by the upper beam plate 23 and the lower beam plate 24 with the sealing part 25, which completely seals the opening, it is possible to effectively prevent high-salt and high-humidity salt spray from entering the cavity formed by the upper beam plate 23 and the lower beam plate 24. This effectively prevents the salt spray from corroding the interior of the upper beam plate 23 and the lower beam plate 24, thereby effectively ensuring the structural strength of the fixing beam 20 and ensuring the stability of the battery pack fixing structure in this embodiment of the application.

[0052] Specifically, in one embodiment of this application, the sealing part 25 is a structural adhesive layer, a resin layer, or a metal layer. By using a structural adhesive layer, resin layer, or metal layer for the sealing part 25, high-salt and high-humidity salt spray can be prevented from entering the cavity formed by the upper beam plate 23 and the lower beam plate 24, thus preventing salt spray from corroding the interior of the upper beam plate 23 and the lower beam plate 24 and ensuring the structural strength of the fixed beam 20.

[0053] like Figure 1 As shown, in one embodiment of this application, the battery pack further includes a flow channel plate 40 and a battery pack; both the flow channel plate 40 and the battery pack are disposed within the receiving cavity enclosed by the housing 10, the battery pack is fixedly disposed above the flow channel plate 40, heat exchange occurs between the flow channel plate 40 and the battery pack, and a flow channel is provided inside the flow channel plate 40, the flow channel containing heat exchange liquid; the guide inlet 51 and the guide outlet 52 are connected to the flow channel of the flow channel plate 40. During the operation of the battery pack in this embodiment, the heat exchange liquid can flow into the flow channel plate 40 from the guide inlet 51 of the guide section 50, flow along the flow channel of the flow channel plate 40 and exchange heat with the battery pack, and then flow out from the guide outlet 52 of the guide section 50, thereby ensuring that the heat exchange liquid is always maintained at a set temperature, thus ensuring that the battery pack operates within a suitable temperature range.

[0054] Furthermore, in one embodiment of this application, the shortest distance between the orthographic projection of either the flow inlet 51 or the flow outlet 52 of the flow guide 50 onto the upper surface of the housing 10 and the orthographic projection of the mounting through hole 221 onto the upper surface of the housing 10 is Q mm, where Q mm satisfies 120 mm ≤ Q mm ≤ 200 mm.

[0055] It is understood that during the operation of the battery pack in this embodiment, the area adjacent to the flow guide 50 typically experiences higher humidity compared to other locations, resulting in a stronger corrosive effect of salt spray on the structure at that location. Therefore, as Figure 5As shown, when the shortest distance Q mm between the orthographic projection of either the flow inlet 51 or the flow outlet 52 of the flow guide 50 onto the upper surface of the housing 10 and the orthographic projection of the mounting through hole 221 onto the upper surface of the housing 10 is less than 120 mm, it is easy to cause excessive humidity around the fixing beam 20 and the mounting bushing, resulting in greater corrosion under long-term salt spray. On the other hand, when the shortest distance Q mm is greater than 120 mm, the flow guide 50 and the fixing beam 20 need to occupy more arrangement space, which can easily affect the arrangement of other structures. Therefore, when the shortest distance Q mm between the orthographic projection of either the flow inlet 51 or the flow outlet 52 of the flow guide 50 onto the upper surface of the housing 10 and the orthographic projection of the mounting through hole 221 onto the upper surface of the housing 10 satisfies 120 mm ≤ Q mm ≤ 200 mm, it can effectively reduce the humidity around the fixed beam 20 and the mounting bushing to reduce corrosion under the action of salt spray, and also reduce the required arrangement space of the flow guide 50 and the fixed beam 20, so as to avoid affecting the arrangement of other structures. In a specific embodiment, the shortest distance Q mm between the orthographic projection of either the flow inlet 51 or the flow outlet 52 of the flow guide 50 onto the upper surface of the housing 10 and the orthographic projection of the mounting through hole 221 onto the upper surface of the housing 10 can be selected from specific values ​​such as 120mm, 126mm, 135mm, 144mm, 150mm, 160mm, 168mm, 177mm, 180mm, 185mm, 190mm, 195mm, 200mm, etc., and is not limited here.

[0056] Furthermore, in one embodiment of this application, the shortest distance Q mm between the orthographic projection of either the flow inlet 51 or the flow outlet 52 of the flow guide 50 onto the upper surface of the housing 10 and the orthographic projection of the mounting through hole 221 onto the upper surface of the housing 10 satisfies 150 mm ≤ Q mm ≤ 180 mm; thus, the humidity around the fixed beam 20 and the mounting bushing can be further effectively reduced to reduce corrosion under the action of salt spray, and the required arrangement space of the flow guide 50 and the fixed beam 20 can also be further reduced to avoid affecting the arrangement of other structures.

[0057] This application also provides an electrical device that includes at least one of the aforementioned battery packs. It is understood that this electrical device can be any type of electrical device, such as an electric vehicle, an appliance with a battery pack, or an energy storage device, and is not limited thereto.

[0058] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0059] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0060] It should be understood that while terms such as "first" or "second" may be used in this application to describe various elements, these elements are not limited by these terms; these terms are merely used to distinguish one element from another. The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms "a," "the," and "the" as used in one or more embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0061] In this document, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, and not to define the absolute position of these related parts. Terms such as "equal" and "same" are not strict mathematical and / or geometric limitations, and also include errors that are understandable to those skilled in the art and permissible in manufacturing or use. Unless otherwise stated, numerical ranges in this document include not only the entire range within its two endpoints, but also several subranges contained therein.

[0062] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0063] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery pack, characterized in that, The device includes a housing (10), a fixed beam (20), and a flow guide (50). The fixed beam (20) and the flow guide (50) are fixedly disposed on the same side of the housing (10). The fixed beam (20) is provided with a fixed hole (21). A fixed bushing (22) is fixedly disposed in the fixed hole (21). The fixed bushing (22) is provided with an installation through hole (221) for the fastener (32) to pass through. The flow guide (50) has a flow inlet (51) and a flow outlet (52). A barrier (31) is provided on the upper surface of the fixed bushing (22). The barrier (31) is disposed around the circumferential outside of the installation through hole (221). The top surface of the barrier (31) is used to fit against the bottom surface of the mounting part.

2. The battery pack according to claim 1, characterized in that, The upper surface of the fixed bushing (22) is provided with a receiving groove (222), the receiving groove (222) is annular, and the barrier (31) is partially located in the receiving groove (222).

3. The battery pack according to claim 1, characterized in that, The radial width of the barrier (31) is A mm, where A mm satisfies 4 mm ≤ A mm ≤ 12 mm.

4. The battery pack according to claim 1, characterized in that, The axial thickness of the barrier (31) in the free state is L mm, where L mm satisfies 2 mm ≤ L mm ≤ 8 mm.

5. The battery pack according to claim 1, characterized in that, The height of the barrier (31) protruding from the upper end face of the fixed bushing (22) in the free state is N mm, where N mm satisfies 0.5 mm ≤ N mm ≤ 3 mm.

6. The battery pack according to claim 2, characterized in that, The depth of the receiving groove (222) is E mm, where E mm satisfies 1 mm ≤ E mm ≤ 5 mm.

7. The battery pack according to claim 1, characterized in that, The mounting through hole (221) is a circular through hole, and the diameter of the mounting through hole (221) is D mm, where D mm satisfies 12 mm ≤ D mm ≤ 25 mm.

8. The battery pack according to claim 1, characterized in that, The distance between the inner edge of the barrier (31) and the mounting through hole (221) is B mm, where B mm satisfies 1 mm ≤ B mm ≤ 5 mm.

9. The battery pack according to claim 1, characterized in that, The distance between the outer edge of the barrier (31) and the outer edge of the upper end face of the fixing bushing (22) is C mm, where C mm satisfies 1 mm ≤ C mm ≤ 5 mm.

10. The battery pack according to claim 1, characterized in that, A welded portion (26) is formed between the upper edge of the fixed bushing (22) and the fixed beam (20). The welded portion (26) is distributed in a portion of the upper edge of the fixed bushing (22); Alternatively, the welded portion (26) may be distributed over the entire area of ​​the upper edge of the fixed bushing (22).

11. The battery pack according to any one of claims 1 to 10, characterized in that, The fixed beam (20) has a fixed end and an extended end. The fixed end is fixed to the side of the box (10), and the fixed bushing (22) is disposed on the extended end, and the extended end is higher than the fixed end.

12. The battery pack according to claim 11, characterized in that, The fixed beam (20) includes an upper beam plate (23) and a lower beam plate (24), which are fixedly connected and form a cavity; the fixed bushing (22) passes through the upper beam plate (23) and the lower beam plate (24).

13. The battery pack according to claim 12, characterized in that, The upper beam plate (23) and the lower beam plate (24) form an opening at the end of the extension end; a sealing part (25) is provided on the opening, and the sealing part (25) completely seals the opening.

14. The battery pack according to claim 13, characterized in that, The sealing part (25) is a structural adhesive layer, a resin layer or a metal layer.

15. The battery pack according to any one of claims 1 to 10, characterized in that, The shortest distance between the orthographic projection of either the flow inlet (51) or the flow outlet (52) of the flow guide (50) on the upper surface of the housing (10) and the orthographic projection of the mounting through hole (221) on the upper surface of the housing (10) is Q mm, where Q mm satisfies 120 mm ≤ Q mm ≤ 200 mm.

16. The battery pack according to claim 15, characterized in that, The shortest distance Q mm between the orthographic projection of either the flow inlet (51) or the flow outlet (52) of the flow guide (50) on the upper surface of the housing (10) and the orthographic projection of the mounting through hole (221) on the upper surface of the housing (10) satisfies 150 mm ≤ Q mm ≤ 180 mm.

17. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1 to 16.

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