Battery packs and electrical equipment

Abstract

This utility model provides a battery pack and electrical equipment. The battery pack includes: a housing with an explosion-proof valve and a mating component protruding from the outer side of the housing; a flow guide covering the outside of the explosion-proof valve, the flow guide having a flow port connecting the inside and outside of the flow guide; and fasteners connected to the mating component to fix the flow guide to the outer surface of the housing. The surface of the flow guide facing the mating component has a recess for accommodating the mating component, and the edge of the flow guide fits against the outer surface of the housing. The technical solution of this application effectively solves the problem of the risk of heat leakage gas due to the gap between the flow guide and the outer surface of the housing in related technologies.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery pack and electrical equipment. Background Technology

[0002] The battery pack in the related technology includes: a housing, a battery, and a flow deflector. The battery is housed inside the housing, which is equipped with an explosion-proof valve. The flow deflector covers the outside of the explosion-proof valve. When thermal runaway occurs in the battery inside the housing, the explosion-proof valve opens, and the hot gas inside the housing is safely discharged through the flow deflector.

[0003] However, due to the gap between the deflector and the outer surface of the enclosure, there is a risk that the hot gas passing through the explosion-proof valve may leak from this gap. Utility Model Content

[0004] The main objective of this invention is to provide a battery pack and electrical equipment to solve the problem of heat leakage gas in the gap between the shroud and the outer surface of the housing in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery pack is provided, comprising: a housing, an explosion-proof valve disposed on the housing, and a mating component protruding from the outer side of the housing; a flow guide shroud covering the outside of the explosion-proof valve, the flow guide shroud having a flow guide port communicating between the interior and exterior of the flow guide shroud; and a fastener connected to the mating component to fix the flow guide shroud to the outer side of the housing; wherein, a cavity for accommodating the mating component is provided on the surface of the flow guide shroud facing the mating component, and the edge of the flow guide shroud is fitted against the outer side of the housing.

[0006] According to another aspect of the present invention, an electrical device is provided, including a battery pack, wherein the battery pack is the aforementioned battery pack.

[0007] The battery pack, using the technical solution of this utility model, includes: a housing, a flow guide, and fasteners. An explosion-proof valve is installed on the housing, and a mating component protruding from the outer side of the housing is also provided. The flow guide, covering the outside of the explosion-proof valve, has a flow-guiding port connecting the inside and outside of the flow guide. Fasteners are connected to the mating component to fix the flow guide to the outer surface of the housing. A cavity for accommodating the mating component is provided on the surface of the flow guide facing the mating component, and the edge of the flow guide fits against the outer surface of the housing. Thus, because the cavity can accommodate the mating component, and the edge of the flow guide can fit against the outer surface of the housing, it prevents the mating component from pushing up the edge of the flow guide, thus avoiding a gap between the flow guide and the outer surface of the housing. This reduces the risk of hot gas leaking from the gap between the flow guide and the outer surface of the housing after passing through the explosion-proof valve. Therefore, the technical solution of this application effectively solves the problem of the risk of hot gas leakage from the gap between the flow guide and the outer surface of the housing in related technologies. Attached Figure Description

[0008] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0009] Figure 1 A perspective structural schematic diagram of an embodiment of the battery pack according to the present invention is shown;

[0010] Figure 2 It shows Figure 1 An enlarged structural diagram of point A of the battery pack;

[0011] Figure 3 It shows Figure 1 A partial structural diagram of the battery pack's fairing after cross-section;

[0012] Figure 4 It shows Figure 1 A partial structural diagram of the fasteners of the battery pack after cross-section;

[0013] Figure 5 It shows Figure 1 A partial top view of the battery pack;

[0014] Figure 6 It shows Figure 5 An enlarged structural diagram of point B of the battery pack;

[0015] Figure 7 It shows Figure 6 An enlarged structural diagram of the battery pack at point C;

[0016] Figure 8 It shows Figure 1 A partial structural diagram showing the battery pack's fairing not mounted on the housing.

[0017] The above figures include the following reference numerals:

[0018] 10. Housing; 11. Mating component; 111. Second connecting hole; 112. Cylinder;

[0019] 20. Explosion-proof valve;

[0020] 30. Draft shield; 31. Draft port; 32. Cavity; 321. Circular cavity; 33. Boss; 331. First connecting hole; 34. Draft shield body; 341. Draft shield plate; 342. Connecting plate; 343. Inclined section; 344. Arc section; 35. Outer flange; 351. Side flange; 352. Top flange;

[0021] 40. Fasteners; 41. Stop heads; 42. Threaded parts. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] According to one aspect of this application, a battery pack is provided, such as Figures 1 to 4 and Figure 8As shown, an embodiment of the battery pack includes: a housing 10, a flow deflector 30, and fasteners 40. An explosion-proof valve 20 is provided on the housing 10, and a mating component 11 protruding from the outer side of the housing 10 is also provided. The flow deflector 30 covers the outside of the explosion-proof valve 20 and has a flow port 31 communicating between the interior and exterior of the flow deflector 30. The fasteners 40 are connected to the mating component 11 to fix the flow deflector 30 to the outer surface of the housing 10. A cavity 32 for accommodating the mating component 11 is provided on the surface of the flow deflector 30 facing the mating component 11, and the edge of the flow deflector 30 fits against the outer surface of the housing 10.

[0026] Fastener 40 is preferably a screw or bolt.

[0027] The technical solution of the battery pack embodiment, because the cavity 32 can accommodate the mating part 11, allows the edge of the air guide 30 to fit against the outer surface of the housing 10, preventing the mating part 11 from pushing up the edge of the air guide 30 and causing a gap between the air guide 30 and the outer surface of the housing 10. This reduces the risk of hot gas leaking from the gap between the air guide 30 and the outer surface of the housing 10 through the explosion-proof valve 20. Therefore, the technical solution of the battery pack embodiment effectively solves the problem of the risk of hot gas leakage from the gap between the air guide 30 and the outer surface of the housing in related technologies.

[0028] like Figures 1 to 4 and Figure 8 As shown, the deflector 30 has a boss 33 at the position corresponding to the mating part 11, and a cavity 32 is provided on the surface of the boss 33 facing the mating part 11. The fastener 40 passes through the boss 33 and the cavity 32 and is connected to the mating part 11. This design ensures a tight fixation between the deflector 30 and the housing 10, because the combined structure of the boss 33 and the cavity 32 can better adapt to the shape of the mating part 11, thereby avoiding gaps between the deflector 30 and the outer surface of the housing 10, making the contact between the edge of the deflector 30 and the housing 10 more compact, thus reducing the risk of hot gas leakage.

[0029] like Figures 1 to 4 and Figure 8 As shown, the flow guide shroud 30 includes a shroud body 34 covering the outside of the explosion-proof valve 20 and an outwardly flanged edge 35 connected to the edge of the shroud body 34. A flow guide port 31 is disposed on the shroud body 34, and a boss 33 is disposed on the outwardly flanged edge 35. The outwardly flanged edge 35 is fitted to the outer surface of the housing 10. The purpose of this design is to utilize the outwardly flanged edge 35 to fit against the outer surface of the housing 10, increasing the contact area and improving the sealing of the edge of the flow guide shroud 30, thereby further reducing the possibility of hot gas leakage.

[0030] like Figures 1 to 4As shown, the fastener 40 includes a stop head 41 and a threaded portion 42 connected to the stop head 41. The threaded portion 42 passes through the boss 33 and the cavity 32 and connects to the mating part 11. The stop head 41 and the boss 33 engage in a stop-and-stop engagement. Through the engagement of the stop head 41 and the boss 33, the stability of the fastener 40 is enhanced, which can effectively prevent the fastener 40 from loosening or falling off during use, ensuring the reliability of the connection, making the connection between the flow guide 30 and the housing 10 more secure, and reducing the risk of heat gas leakage caused by the loosening or falling off of the fastener 40.

[0031] like Figures 2 to 7 As shown, the minimum first distance L1mm is between the boss 33 and the cover body 34, which satisfies the condition: 2mm ≤ L1mm ≤ 8mm. This specific range of the first distance L1mm between the boss 33 and the cover body 34 is designed to ensure the correct installation position of the flow guide shroud 30 on the housing 10. Too small a distance would result in insufficient contact area between the outer flange 35 and the outer surface of the housing 10, increasing the possibility of leakage; too large a distance would occupy more space and easily affect the installation of other structures (such as wiring).

[0032] The first distance L1mm is preferably 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7.0mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, or 8.0mm.

[0033] like Figures 2 to 7 As shown, the boss 33 is provided with a first connecting hole 331 for the fastener 40 to pass through. The axis of the first connecting hole 331 and the cover body 34 have a second distance L2mm, which satisfies the condition: 5mm≤L2mm≤15mm. The constraint condition of the second distance L2mm between the axis of the first connecting hole 331 and the cover body 34 helps to ensure that the fastener 40 is correctly aligned with the mating part 11, improves the installation accuracy of the fastener 40, reduces the potential gap between the guide cover 30 and the housing 10 caused by inaccurate positioning, and reduces the risk of heat gas leakage.

[0034] The second distance L2mm is preferably 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7.0mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8.0mm, 8.2mm, 8.4mm, 8.6mm, 8.8mm, 9.0mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm, 10.0mm, or 10.2mm. mm, 10.4mm, 10.6mm, 10.8mm, 11.0mm, 11.2mm, 11.4mm, 11.6mm, 11.8mm, 12.0mm, 12.2mm, 12.4mm, 12.6mm , 12.8mm, 13.0mm, 13.2mm, 13.4mm, 13.6mm, 13.8mm, 14.0mm, 14.2mm, 14.4mm, 14.6mm, 14.8mm or 15.0mm.

[0035] like Figures 2 to 4 and Figure 8 As shown, the mating part 11 is provided with a second connecting hole 111 for connecting to the fastener 40. The second connecting hole 111 corresponds to the first connecting hole 331, and the diameter D1mm of the first connecting hole 331 is larger than the diameter D2mm of the second connecting hole 111. This design allows the fastener 40 a certain tolerance space when passing through the second connecting hole 111 and the first connecting hole 331, which facilitates the assembly of the fastener 40 and maintains proper sealing, simplifies the assembly process, and does not affect the leak-proof effect.

[0036] like Figures 2 to 4 and Figure 8 As shown, the ratio of the diameter D1mm of the first connecting hole 331 to the diameter D2mm of the second connecting hole 111 satisfies: 1.05≤D1 / D2≤1.2. This ratio further refines the assembly accuracy of the fastener 40, ensures the sealing performance of the connection, and also considers ease of assembly.

[0037] The ratio of the diameter D1mm of the first connecting hole 331 to the diameter D2mm of the second connecting hole 111 is preferably 1.05, 1.06, 1.07, 1.08, 1.09, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19 or 1.20.

[0038] like Figures 2 to 4As shown, the outer flange 35 includes side flanges 351 connected to the two side edges of the cover body 34 and a top flange 352 connected to the top edge of the cover body 34. The minimum dimension L3mm of the top flange 352 along the height Z direction of the housing 10 satisfies: 8mm≤L3mm≤25mm. The setting range of the minimum dimension L3mm of the top flange 352 along the height Z direction of the housing 10 is to ensure that the outer flange 35 of the air guide shroud 30 can fully cover the surface of the housing 10, preventing hot gas from the top from directly hitting the top cover of the battery pack and re-entering the interior of the housing 10, thus causing a safety hazard.

[0039] The minimum dimension L3mm of the top flange 352 along the height direction Z of the box body 10 is preferably 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm or 25mm.

[0040] like Figures 2 to 6 As shown, the cover body 34 includes a cover plate 341 spaced apart from the explosion-proof valve 20 and a connecting plate 342 connecting the cover plate 341 and the outer flange 35. The connecting plate 342 includes an inclined section 343 connected to the outer flange 35 and an arc section 344 connecting the inclined section 343 and the cover plate 341. This geometric structure can guide hot gas to be smoothly discharged through the guide port 31, while reducing turbulence generated by the gas at the corner and improving heat dissipation efficiency.

[0041] like Figures 2 to 6 As shown, in the direction from the explosion-proof valve 20 to the cover plate 341, the inclined section 343 has a third distance L4mm, and the arc section 344 has a fourth distance L5mm, where the fourth distance L5mm is greater than or equal to the third distance L4mm. This fourth distance L5mm is greater than or equal to the third distance L4mm to ensure that the arc section 344 can more effectively guide the hot gas, avoid turbulence in the transition area, and thus improve exhaust efficiency.

[0042] like Figures 2 to 6 As shown, the ratio of the fourth distance L5mm to the third distance L4mm satisfies: 1.2≤L5 / L4≤2. The ratio of the distance between the arc segment 344 and the inclined segment 343 is set so that the arc segment 344 has a larger guiding area, effectively avoiding the generation of turbulence, while also taking into account the structural strength of the connecting plate 342.

[0043] The ratio of the fourth distance L5mm to the third distance L4mm is preferably 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2.0.

[0044] like Figure 3 and Figures 5 to 7As shown, the inclined section 343 is inclined toward the axis of the explosion-proof valve 20, and the inclination angle A1° of the inclined section 343 satisfies: 10°≤A1°≤45°. The limited range of the inclination angle A1° ensures that the gas can flow smoothly out along the inclined surface of the guide shroud 30 after leaving the explosion-proof valve 20, reducing backflow and turbulence, and improving the safety and efficiency of exhaust.

[0045] The tilt angle A1° of the inclined segment 343 is preferably 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44° or 45°.

[0046] In this embodiment, the battery pack further includes a first sealing element disposed between the cavity 32 and the mating member 11. The first sealing element enhances the seal between the cavity 32 and the mating member 11, preventing hot gases from leaking through the tiny gaps at the contact point between the mating member 11 and the cavity 32. The first sealing element is preferably a sealing gasket or a sealing ring.

[0047] In this embodiment, the battery pack further includes a second seal disposed between the boss 33 and the fastener 40. The second seal is provided to further seal the path through which the fastener 40 passes, preventing hot gases from leaking through the gap at the connection between the fastener 40 and the boss 33. The second seal is preferably a gasket or a sealing ring.

[0048] like Figures 3 to 6 As shown, the portion of the mating part 11 that protrudes from the outer side of the housing 10 is a cylinder 112, and the cavity 32 is a circular cavity 321 that accommodates the cylinder 112. The cavity 32 is correspondingly designed as a circular cavity 321. This geometric matching helps to improve the sealing and assembly accuracy of the connection between the mating part 11 and the guide shroud 30, and reduces the possibility of heat gas leakage.

[0049] like Figures 3 to 6 As shown, the ratio of the diameter D3mm of the cavity 321 to the outer diameter D4mm of the cylinder 112 satisfies: 1.1≤D3 / D4≤1.5. The ratio of the diameter D3mm of the cavity 321 to the outer diameter D4mm of the cylinder 112 is set to ensure a better sealing state between the mating part 11 and the cavity 32, while also taking into account the ease of installation of the fastener 40.

[0050] The ratio of the diameter D3mm of the cavity 321 to the outer diameter D4mm of the cylinder 112 is preferably 1.1, 1.2, 1.3, 1.4 or 1.5.

[0051] like Figures 3 to 6 As shown, the diameter D3mm of the circular cavity 321 satisfies: 5mm≤D3mm≤15mm. The diameter D3mm of the circular cavity 321 meeting a specific range helps to maintain better sealing performance between the guide shield 30 and the mating part 11, while reducing the risk of leakage caused by improper size.

[0052] The diameter D3mm of the circular cavity 321 is preferably 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7.0mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8.0mm, 8.2mm, 8.4mm, 8.6mm, 8.8mm, 9.0mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm, 10.0mm, 10 .2mm, 10.4mm, 10.6mm, 10.8mm, 11.0mm, 11.2mm, 11.4mm, 11.6mm, 11.8mm, 12.0mm, 12.2mm, 12.4mm, 12.6m m, 12.8mm, 13.0mm, 13.2mm, 13.4mm, 13.6mm, 13.8mm, 14.0mm, 14.2mm, 14.4mm, 14.6mm, 14.8mm or 15.0mm.

[0053] like Figures 3 to 6 As shown, the outer diameter D4mm of the cylinder 112 satisfies: 3.5mm≤D4mm≤12mm. The outer diameter D4mm of the cylinder 112 is set within a certain range, which not only ensures the stable connection between the mating part 11 and the housing 10, but also takes into account the effective fit with the cavity 32 of the guide shroud 30, reducing the risk of leakage caused by size issues.

[0054] The outer diameter D4mm of the cylinder 112 is preferably 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, 10.0mm, 10.5mm, 11.0mm, 11.5mm or 12.0mm.

[0055] like Figures 3 to 6 As shown, the mating part 11 is a rivet nut. This ensures a reliable connection between the fastener 40 and the housing 10, guarantees the secure installation of the air deflector 30, and reduces the risk of heat gas leakage caused by unstable connection.

[0056] An explosion-proof valve is a component that actuates to release internal pressure or temperature when the internal pressure or temperature of a battery pack reaches a predetermined threshold. The working principle of an explosion-proof valve is to establish a regulated venting channel inside the battery compartment. When the internal pressure of the battery compartment increases, the valve opens, allowing gas to escape and thus reducing the pressure.

[0057] Explosion-proof valves can be made of metal materials or flame-retardant polymer materials such as polyvinyl chloride, polyvinylidene chloride, and fluoroplastics.

[0058] The fairing can be made of metal materials, such as aluminum alloy or magnesium alloy; or it can be made of plastic.

[0059] In this application, the enclosure refers to a closed or semi-closed structure made of materials such as metal and plastic, which is the physical carrier of the battery pack. Its design and manufacturing must meet the safety, reliability and functionality requirements of the battery pack in different usage scenarios.

[0060] The enclosure provides installation space for battery packs, BMS, cooling systems, electrical connection components, etc., and through reasonable structural design, these components are fixed in the enclosure to ensure that they maintain a relatively stable position during battery pack operation, avoiding damage to components or loosening of connections due to vibration, impact and other factors.

[0061] The enclosure includes a lower enclosure, which includes a bottom plate and a side plate connected to and surrounding the bottom plate; and an upper enclosure, which is connected to the side plate and has a cover plate opposite to the bottom plate. The upper enclosure and the lower enclosure together enclose a receiving chamber.

[0062] The enclosure can be cast from materials such as steel plates and aluminum alloys, or lightweight materials such as glass fiber reinforced composites and carbon fiber reinforced composites. The shape of the enclosure can be cylindrical, cuboid, cube, etc.

[0063] The aforementioned battery pack includes a battery pack composed of multiple batteries connected in series and / or in parallel to form a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. All of these components are placed inside a housing and sealed with a cover plate to form a complete functional unit that can directly output electrical energy.

[0064] The aforementioned batteries can be secondary or primary batteries, and can also be lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, or magnesium-ion batteries, etc., but this embodiment of the invention is not limited to these. Batteries can be cylindrical, flat, cuboid, or other shapes, but this embodiment of the invention is not limited to these shapes either. Batteries are generally classified into three types according to their packaging method: cylindrical batteries, square batteries, and pouch batteries, but this embodiment of the invention is not limited to these types either.

[0065] For example, a battery may include a casing, a cell, and an electrolyte, with the casing housing the cell and electrolyte. The cell also includes a separator. Batteries primarily function by the movement of metal ions between the positive and negative electrodes.

[0066] According to another aspect of this application, an electrical device is provided, an embodiment of which includes a battery pack capable of supplying power to the device. The battery pack is the aforementioned battery pack. Since the aforementioned battery pack can solve the problem of heat leakage gas due to the gap between the shroud and the outer surface of the housing in related technologies, the electrical device including this battery pack can solve the same technical problem.

[0067] The electrical equipment disclosed in this utility model embodiment can be, but is not limited to, vehicles, mobile phones, tablets, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be fuel-powered vehicles, natural gas vehicles, new energy vehicles, or rail vehicles; new energy vehicles can be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. When the electrical equipment is a vehicle, the battery pack can be located at the bottom, front, or rear of the vehicle.

[0068] In the description of this utility model, it should be understood that "multiple" means a quantity of two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0069] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0070] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0071] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized by, include: The enclosure (10) is provided with an explosion-proof valve (20) and a fitting part (11) protruding from the outer side of the enclosure (10). A flow guide (30) is provided on the outside of the explosion-proof valve (20), and the flow guide (30) has a flow guide port (31) that connects the inside of the flow guide (30) and the outside of the flow guide (30); Fasteners (40) are connected to the mating parts (11) to fix the flow guide (30) on the outer side of the housing (10); The flow guide (30) has a cavity (32) for accommodating the fitting (11) on its surface facing the fitting (11), and the edge of the flow guide (30) is attached to the outer side of the box (10).

2. The battery pack of claim 1, wherein, The flow guide (30) is provided with a boss (33) at the position corresponding to the mating part (11), and the cavity (32) is provided on the surface of the boss (33) facing the mating part (11). The fastener (40) passes through the boss (33) and the cavity (32) and is connected to the mating part (11).

3. The battery pack according to claim 2, characterized in that, The flow guide cover (30) includes a cover body (34) covering the outside of the explosion-proof valve (20) and an outer flange (35) connected to the edge of the cover body (34). The flow guide port (31) is provided on the cover body (34), the boss (33) is provided on the outer flange (35), and the outer flange (35) is attached to the outer side of the box (10).

4. The battery pack according to claim 3, characterized in that, The fastener (40) includes a stop head (41) and a threaded portion (42) connected to the stop head (41). The threaded portion (42) passes through the boss (33) and the cavity (32) and is connected to the mating part (11). The stop head (41) and the boss (33) engage in a stop-fitting relationship.

5. The battery pack according to claim 3, characterized in that, The protrusion (33) and the cover body (34) have a minimum first distance L1mm, which satisfies: 2mm≤L1mm≤8mm.

6. The battery pack according to claim 3, characterized in that, The boss (33) is provided with a first connecting hole (331) through which the fastener (40) passes. The axis of the first connecting hole (331) and the cover body (34) have a second distance L2mm. The second distance L2mm satisfies: 5mm≤L2mm≤15mm.

7. The battery pack according to claim 6, characterized in that, The mating part (11) is provided with a second connecting hole (111) that connects to the fastener (40). The second connecting hole (111) corresponds to the first connecting hole (331), and the diameter D1mm of the first connecting hole (331) is greater than the diameter D2mm of the second connecting hole (111).

8. The battery pack according to claim 7, characterized in that, The ratio of the diameter D1mm of the first connecting hole (331) to the diameter D2mm of the second connecting hole (111) satisfies: 1.05≤D1 / D2≤1.

2.

9. The battery pack according to claim 3, characterized in that, The outer flange (35) includes a side flange (351) connected to the two sides of the cover body (34) and a top flange (352) connected to the top edge of the cover body (34). The minimum dimension L3mm of the top flange (352) along the height direction (Z) of the box body (10) satisfies: 8mm≤L3mm≤25mm.

10. The battery pack according to claim 3, characterized in that, The cover body (34) includes a cover plate (341) spaced apart from the explosion-proof valve (20) and a connecting plate (342) connecting the cover plate (341) and the outer flange (35). The connecting plate (342) includes an inclined section (343) connected to the outer flange (35) and an arc section (344) connecting the inclined section (343) and the cover plate (341).

11. The battery pack according to claim 10, characterized in that, In the direction from the explosion-proof valve (20) to the cover plate (341), the inclined section (343) has a third distance L4mm, and the arc section (344) has a fourth distance L5mm, wherein the fourth distance L5mm is greater than or equal to the third distance L4mm.

12. The battery pack according to claim 11, characterized in that, The ratio of the fourth distance L5mm to the third distance L4mm satisfies: 1.2≤L5 / L4≤2.

13. The battery pack according to claim 10, characterized in that, The inclined section (343) is inclined toward the axis of the explosion-proof valve (20), and the inclination angle A1° of the inclined section (343) satisfies: 10°≤A1°≤45°.

14. The battery pack according to claim 1, characterized in that, The battery pack also includes a first seal disposed between the cavity (32) and the mating member (11).

15. The battery pack according to claim 2, characterized in that, The battery pack also includes a second seal disposed between the boss (33) and the fastener (40).

16. The battery pack according to claim 1, characterized in that, The portion of the mating part (11) that protrudes from the outer side of the box body (10) is a cylinder (112), and the cavity (32) is a cavity (321) that accommodates the cylinder (112).

17. The battery pack according to claim 16, characterized in that, The ratio of the diameter D3mm of the circular cavity (321) to the outer diameter D4mm of the cylinder (112) satisfies: 1.1≤D3 / D4≤1.

5.

18. The battery pack according to claim 17, characterized in that, The diameter D3mm of the circular cavity (321) satisfies: 5mm≤D3mm≤15mm.

19. The battery pack according to claim 17, characterized in that, The outer diameter D4mm of the cylinder (112) satisfies: 3.5mm≤D4mm≤12mm.

20. The battery pack according to claim 1, characterized in that, The mating part (11) is a rivet nut.

21. An electrical device, comprising a battery pack, characterized in that, The battery pack is the battery pack according to any one of claims 1 to 20.

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