Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and solves the problem of relatively low reliability of corners of a battery box body in the prior art. The battery device comprises a battery box body and a corner protection structure, wherein the battery box body comprises a frame body; every two adjacent side walls of the frame body are arranged in a crossed mode and connected to form a corner. The corner protection structures are positioned on the outer surfaces of the corners and are connected with the battery box body; in the height direction of the battery box body, the top ends of the corner protection structures exceed the top ends of the side walls; and / or the bottom ends of the corner protection structures exceed the bottom ends of the side walls.

Description

Technical Field

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

[0002] Currently, judging from market trends, battery devices are being used more and more widely. Batteries can be power batteries or energy storage batteries. A battery device can include individual battery cells and a battery casing, with the individual cells housed within the casing. However, the corners of the battery casing have lower reliability, which in turn lowers the overall reliability of the battery device. Utility Model Content

[0003] The main technical problem addressed by this application is to provide a battery device and electrical equipment that solves the problem of low reliability at the corners of the battery casing in the prior art.

[0004] To solve the above-mentioned technical problems, the first technical solution adopted in this application is: to provide a battery device, the battery device including a battery box and a corner protection structure, the battery box including a frame; two adjacent side walls of the frame are intersected and connected to form a corner; the corner protection structure is located on the outer surface of the corner and is connected to the battery box; wherein, along the height direction of the battery box, the top end of the corner protection structure extends beyond the top end of the side wall; and / or, the bottom end of the corner protection structure extends beyond the bottom end of the side wall.

[0005] In this embodiment, the corner protection structure is located on the outer surface of the corner and is connected to the battery box, so that the corner protection structure protects the entire corner along the height direction of the battery box, thereby improving the reliability of the corner of the battery box and thus improving the reliability of the battery device.

[0006] In some embodiments, the battery housing further includes a top wall and a bottom wall disposed opposite to each other along the height direction of the battery housing; a frame is connected between the top wall and the bottom wall; wherein, along the height direction of the battery housing, the top end of the corner protection structure is connected to the top wall; and / or, along the height direction of the battery housing, the bottom end of the corner protection structure is connected to the bottom wall.

[0007] In this embodiment, the corner protection structure also serves to connect the frame to the bottom wall and / or top wall, improving the connection reliability between the frame and the bottom wall and / or top wall, thereby improving the reliability of the battery box and, consequently, the reliability of the battery device.

[0008] In some embodiments, along the height direction of the battery housing, the top end of the corner protector structure extends beyond the top wall and toward the top surface of the top wall; the bottom end of the corner protector structure extends beyond the bottom wall and toward the bottom surface of the bottom wall; the portion of the corner protector structure extending to the top surface of the top wall forms a connection portion connected to the top surface of the top wall, and the portion of the corner protector structure extending to the bottom surface of the bottom wall forms another connection portion connected to the bottom surface of the bottom wall.

[0009] In this embodiment, the connection reliability between the corner protection structure and the top and / or bottom walls is further improved, thereby further improving the reliability of the battery box and, consequently, the reliability of the battery device.

[0010] In some embodiments, the corner protector structure includes two protectors and two connecting parts; the two protectors intersect and are connected; each connecting part is connected to both protectors; the connection between the two protectors is chamfered, and / or the connection between the protectors and the connecting parts is chamfered.

[0011] In this embodiment, the chamfered joint between the two protective parts reduces the risk of stress concentration at the joint, thereby reducing the risk of breakage at the joint. The chamfered joint between the protective parts and the connecting part further reduces the risk of stress concentration at the joint, thus reducing the risk of breakage at the joint.

[0012] In some embodiments, the two protective parts and the two connecting parts are integrally formed. In this embodiment, the two protective parts and the two connecting parts are integrally formed, which makes the corner protector structure have high strength and stability, and extends the service life of the corner protector structure.

[0013] In some embodiments, a gap exists between the protective portion and the sidewall. In this embodiment, because there is a gap between the protective portion and the sidewall, when objects such as sand and gravel impact the corner protection structure, the protective portion deforms to a certain extent towards one side of the sidewall to absorb the impact force of the objects such as sand and gravel, reduce the squeezing force of the protective portion on the sidewall, thereby reducing the risk of damage to the battery box and improving the reliability of the battery device.

[0014] In some embodiments, the top wall extends beyond the side wall in a direction perpendicular to the height of the battery housing; the two side edges of the cover have protrusions protruding into the frame near the surface of the frame.

[0015] In this embodiment, the protrusion can reduce the gap between the side edge of the protector and the side wall, thereby reducing the probability of impurities entering the gap between the protector and the side wall, thus extending the service life of the corner protector structure and improving the reliability of the battery device.

[0016] In some embodiments, the battery device further includes fasteners, one connection being connected to the top wall via the fasteners, and the other connection being connected to the bottom wall via the fasteners.

[0017] In this embodiment, fasteners are used to connect the corner protector structure to the battery box, and also facilitate the separation of the corner protector structure from the battery box for replacement and maintenance of the corner protector structure and the battery box.

[0018] In some embodiments, there are multiple corner protection structures and multiple corners of the frame; the multiple corner protection structures are provided one-to-one with the multiple corners.

[0019] In this embodiment, multiple corner protection structures can protect multiple corners, thereby further improving the reliability of the battery box and, consequently, the reliability of the battery device.

[0020] In some embodiments, the surfaces of the two sidewalls forming the corner near the corner protection structure each have recesses that are recessed into the frame, and the surface of the corner protection structure near the frame has two protrusions that are protruding into the frame. The two protrusions of the corner protection structure are respectively located within the recesses of the two sidewalls forming the corner.

[0021] In this embodiment, by utilizing the cooperation of the two protrusions of the corner protector structure and the recesses of the two sidewalls forming the corner, the movement of the corner protector structure in the direction perpendicular to the height of the battery box can be restricted, thereby improving the connection reliability between the corner protector structure and the battery box, and thus improving the reliability of the battery device.

[0022] To address the aforementioned technical problems, the second technical solution provided in this application is: to provide an electrical device, comprising an electrical component and the aforementioned battery device, wherein the battery device is electrically connected to the electrical component. Since the electrical device includes the aforementioned battery device, it therefore possesses the same technical effects as the aforementioned battery device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0024] Figure 1 This is a structural schematic diagram of the electrical equipment provided in this application;

[0025] Figure 2 This is a schematic diagram of the battery device provided in this application;

[0026] Figure 3 This is a cross-sectional view of the battery device provided in this application without the corner protector structure;

[0027] Figure 4 yes Figure 2 A magnified view at point Q;

[0028] Figure 5 yes Figure 4 A structural diagram from another perspective;

[0029] Figure 6 yes Figure 4 A cross-sectional view at line AB;

[0030] Figure 7 This is a schematic diagram of the structure of the battery cell provided in this application;

[0031] Figure 8 This is a schematic diagram of the corner protector structure provided in this application.

[0032] In the diagram: 1. Battery assembly; 11. Battery housing; 111. Top wall; 112. Frame; 1121. Side wall; 113. Bottom wall; 114. Corner; 115. Lower housing; 116. Upper housing; 12. Battery cell; 121. Connecting component; 122. Cover plate; 123. Terminal post; 124. Safety valve; 125. Electrode assembly; 126. Housing; 13. Corner protection structure; 131. Connecting part; 132. Protective part; 133. Protrusion; 14. Fastener; 2. Electrical components. Detailed Implementation

[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0034] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.

[0035] 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 a part of the embodiments of this application, and not all of the 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.

[0036] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. 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 is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Batteries can be power batteries, which provide power to tools and vehicles, such as electric cars, electric trains, electric bicycles, golf carts, and aerospace equipment. Of course, battery devices can also be energy storage batteries, which are used to store energy from renewable energy sources such as hydroelectric, thermal, wind, and solar power plants. As the application areas of battery devices continue to expand, the market demand is also constantly increasing.

[0039] The battery assembly includes individual battery cells and a battery housing, with the individual battery cells housed within the battery housing. Adjacent side walls of the battery housing intersect and are welded together to form a corner. For example, if the battery assembly is installed in a vehicle, objects such as sand and gravel may strike the corner during vehicle operation, potentially causing the coating on the weld seams at the corner to peel off. This reduces the reliability of the corner of the battery housing, and consequently, the reliability of the entire battery assembly.

[0040] To address the issue of low reliability in battery housings, embodiments of this application provide a battery device comprising a battery housing and corner protection structures. The battery housing includes a frame; two adjacent sidewalls of the frame are intersecting and connected to form a corner; the corner protection structure is located on the outer surface of the corner and connected to the battery housing; wherein, along the height direction of the battery housing, the top end of the corner protection structure extends beyond the top end of the sidewall; and / or, the bottom end of the corner protection structure extends beyond the bottom end of the sidewall. In this embodiment, the corner protection structure is located on the outer surface of the corner and connected to the battery housing, such that the corner protection structure protects the entire corner along the height direction of the battery housing, thereby improving the reliability of the corner of the battery housing and thus improving the reliability of the battery device.

[0041] An embodiment of this application provides an electrical device, see [link to embodiment]. Figure 1 The electrical equipment includes an electrical component 2 and a battery device 1, with the battery device 1 being electrically connected to the electrical component 2.

[0042] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. 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.

[0043] Battery device 1 is used to provide electrical energy to electrical equipment. Electrical device 2 can be a component or device capable of consuming electricity. Electrical device 2 can be a controller and electronic components, etc. The controller can be a central processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0044] For ease of explanation, we will use a vehicle as an example to illustrate the use of electrical equipment. See also... Figure 1 The electrical equipment can be a vehicle, and the electrical components 2 can be the vehicle's lights (e.g., headlights, taillights), display screen, dashboard, control system (e.g., controller), etc. The vehicle may also include a frame, with both the battery device 1 and the electrical components 2 mounted on the vehicle body.

[0045] Embodiments of this application also provide a battery device, see [link to embodiment]. Figures 2-6 The battery device 1 includes a battery housing 11 and a corner protection structure 13. The battery housing 11 includes a frame 112. Two adjacent side walls 1121 of the frame 112 are intersected and connected to form a corner 114. The corner protection structure 13 is located on the outer surface of the corner 114 and is connected to the battery housing 11. The top end of the corner protection structure 13 extends beyond the top end of the side wall 1121 along the height direction Z of the battery housing 11. And / or, the bottom end of the corner protection structure 13 extends beyond the bottom end of the side wall 1121.

[0046] The battery housing 11 has a chamber for accommodating individual battery cells 12. The battery housing 11 may include a frame 112, a top wall 111, and a bottom wall 113; the frame 112 is connected between the top wall 111 and the bottom wall 113 to form the chamber. The shape of the battery housing 11 can be specifically set as needed; for example, the shape of the battery housing 11 may be cylindrical, rectangular, etc.

[0047] The frame 112 includes at least three side walls 1121, which are connected end-to-end to form the frame 112; for example, four side walls 1121 can form a rectangular frame. Adjacent side walls 1121 are intersected and connected to form a corner 114, for example, adjacent side walls 1121 are perpendicular and can be connected to form a right-angled corner 114. For example, a rectangular frame may have four corners 114. The connection between adjacent side walls 1121 can be fixed or detachable. For example, adjacent side walls 1121 can be welded together, or they can be inserted together. In some examples, the side wall 1121 can be called a side beam, the top wall 111 can be called a top structure, and the bottom wall 113 can be called a bottom structure.

[0048] The top wall 111 is connected to the frame 112 and can cover one opening of the frame 112; the bottom wall 113 is connected to the frame 112 and can cover the other opening of the frame 112; the top wall 111 and the bottom wall 113 are arranged opposite each other along the height direction Z of the frame 112. See also Figure 3 In some examples, the battery housing 11 may include a covered upper housing 116 and a lower housing 115. The top wall 111 may serve as the upper housing 116, and the bottom wall 113 and the frame 112 as a whole may serve as the lower housing 115. The bottom wall 113 may include a bottom protective plate and a cooling plate; the cooling plate is disposed on the frame 112, and the bottom protective plate is disposed on the side of the cooling plate away from the frame 112. For example, the bottom protective plate and the cooling plate may be an integrally formed structure. Alternatively, the bottom wall 113 may also include a bottom plate disposed between the frame 112 and the cooling plate. The height direction Z of the frame 112 is the same as the height direction Z of the battery housing 11.

[0049] The battery device 1 also includes battery cells 12, with one or more battery cells 12 installed in the cavity, so that the battery housing 11 can protect the battery cells 12 and facilitate the collection of multiple battery cells 12 together.

[0050] The battery cell 12 can be a rechargeable battery, which refers to a battery cell 12 that can be recharged after being discharged to activate the active materials and continue to be used. The battery cell 12 can include, but is not limited to, 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.

[0051] See Figure 7 The battery cell 12 may include a housing 126, an electrode assembly 125, and a cover 122. The housing 126 has a communicating cavity and a mounting port. The number of electrode assemblies 125 may be one or more; the electrode assemblies 125 are mounted in the cavity of the housing 126. The cover 122 is connected to the housing 126 and covers the mounting port. The housing 126 is filled with an electrolyte, such as an electrolyte solution.

[0052] The electrode assembly 125 may include an anode electrode and a cathode electrode, as well as a separator disposed between the anode electrode and the cathode electrode. During the charging and discharging process of the battery cell 12, active ions (e.g., lithium ions) repeatedly insert and extract between the anode electrode and the cathode electrode. The separator can, to some extent, prevent short circuits between the anode electrode and the cathode electrode, while allowing active ions to pass through. The battery cell 12 may also include a safety valve 124 (also called a pressure relief valve), two terminals 123, and two connecting members 121 (also called current collectors). The safety valve 124 may be disposed on a cover plate 122, for example, the safety valve 124 may be fixed to the cover plate 122. The safety valve 124 is actuated when the internal pressure or temperature of the battery cell 12 reaches a threshold to release the internal electrolyte, thereby reducing the internal pressure or temperature of the battery cell 12. For example, the safety valve 124 may be a temperature-sensitive valve, a pressure-sensitive valve, etc. Two terminals 123 can be disposed on the cover plate 122, namely a positive terminal 123 and a negative terminal 123, and each terminal 123 is connected to a corresponding connecting member 121. The connecting member 121 is located between the cover plate 122 and the electrode assembly 125, and is used to electrically connect the electrode assembly 125 and the terminal 123. The housing 126 is a hollow structure, and the material of the housing 126 can be metal or plastic; for example, the material of the housing 126 can be copper, iron, aluminum, steel, aluminum alloy, etc.

[0053] The corner protector structure 13 can be made of metal or plastic, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0054] The corner protector structure 13 can be fixedly connected to the battery housing 11, or it can be detachably connected. See [link / reference] Figure 4 For example, the corner protector structure 13 is connected to the battery box 11 via fasteners 14, which can be screws, rivets, etc. Alternatively, the corner protector structure 13 may be welded to the battery box 11. The corner protector structure 13 may be connected to at least one of the frame 112, top wall 111, and bottom wall 113; for example, the corner protector structure 13 may be connected to the frame 112, top wall 111, or bottom wall 113; or it may be connected to both the frame 112 and bottom wall 113; or it may be connected to both the top wall 111 and bottom wall 113; or it may be connected to both the frame 112 and top wall 111; or it may be connected to all three of the frame 112, top wall 111, and bottom wall 113. In some examples, the corner protector structure 13 is riveted to both the top wall 111 and bottom wall 113, in which case the fastener 14 is a rivet.

[0055] The top of the corner protector structure 13 extends beyond the top of the side wall 1121, which can be understood as the top of the corner protector structure 13 extending beyond the tops of the two adjacent side walls 1121. The bottom of the corner protector structure 13 extends beyond the bottom of the side wall 1121, which can be understood as the bottom of the corner protector structure 13 extending beyond the bottom of the two adjacent side walls 1121. The tops of the two adjacent side walls 1121 may or may not be flush; the bottoms of the two adjacent side walls 1121 may or may not be flush.

[0056] In some examples, the top of the corner protector 13 extends beyond the top of the sidewall 1121; in this case, the bottom of the corner protector 13 extends beyond the bottom of the sidewall 1121, or the bottom of the corner protector 13 is flush with the bottom of the sidewall 1121.

[0057] In other examples, the bottom end of the corner protector 13 extends beyond the bottom end of the side wall 1121; in this case, the top end of the corner protector 13 extends beyond the top end of the side wall 1121, or the top end of the corner protector 13 is flush with the top end of the side wall 1121.

[0058] In other examples, the top end of the corner protector 13 extends beyond the top end of the sidewall 1121; and the bottom end of the corner protector 13 extends beyond the bottom end of the sidewall 1121.

[0059] In the height direction Z of the battery box 11, the top end of the corner protection structure 13 is opposite to the bottom end of the corner protection structure 13, and the top end of the side wall 1121 is opposite to the bottom end of the side wall 1121.

[0060] In this embodiment, the corner protection structure 13 is located on the outer surface of the corner 114 and is connected to the battery box 11, so that the corner protection structure 13 protects the entire corner 114 along the height direction Z of the battery box 11, thereby improving the reliability of the corner 114 of the battery box 11 and thus improving the reliability of the battery device 1.

[0061] In some embodiments, the battery housing 11 further includes a top wall 111 and a bottom wall 113 disposed opposite to each other along the height direction Z of the battery housing 11; a frame 112 is connected between the top wall 111 and the bottom wall 113; wherein, along the height direction Z of the battery housing 11, the top end of the corner protection structure 13 is connected to the top wall 111; and / or, along the height direction Z of the battery housing 11, the bottom end of the corner protection structure 13 is connected to the bottom wall 113.

[0062] In some examples, the top end of the corner protector 13 is connected to the top wall 111 along the height direction Z of the battery housing 11. In this case, for example, the top end of the corner protector 13 can be connected to the side of the top wall 111, or the top end of the corner protector 13 can be connected to the top surface of the top wall 111.

[0063] In other examples, along the height direction Z of the battery housing 11, the bottom end of the corner protection structure 13 is connected to the bottom wall 113. In this case, for example, the bottom end of the corner protection structure 13 can be connected to the side of the bottom wall 113, or the bottom end of the corner protection structure 13 can be connected to the bottom surface of the bottom wall 113. Furthermore, along the height direction Z of the battery housing 11, the top surface of the top wall 111 and the bottom surface of the bottom wall 113 are positioned opposite each other.

[0064] In other examples, along the height direction Z of the battery housing 11, the top end of the corner protection structure 13 is connected to the top wall 111; the bottom end of the corner protection structure 13 is connected to the bottom wall 113. In this case, the part of the corner protection structure 13 opposite to the side wall 1121 may be connected to the side wall 1121 or may not be connected to the side wall 1121.

[0065] In this embodiment, the corner protection structure 13 also serves to connect the frame 112 with the bottom wall 113 and / or the top wall 111, thereby improving the reliability of the connection between the frame 112 and the bottom wall 113 and / or the top wall 111, thus improving the reliability of the battery box 11, and further improving the reliability of the battery device 1.

[0066] In some embodiments, along the height direction Z of the battery housing 11, the top end of the corner protection structure 13 extends beyond the top wall 111 and extends toward the top surface of the top wall 111; the bottom end of the corner protection structure 13 extends beyond the bottom wall 113 and extends toward the bottom surface of the bottom wall 113; the portion of the corner protection structure 13 extending to the top surface of the top wall 111 forms a connection portion 131 connected to the top surface of the top wall 111, and the portion of the corner protection structure 13 extending to the bottom surface of the bottom wall 113 forms another connection portion 131 connected to the bottom surface of the bottom wall 113.

[0067] The portion of the corner guard structure 13 extending to the top surface of the top wall 111 is a connecting part 131. The connecting part 131 can be welded to the top surface of the top wall 111, and the connecting part 131 can also be connected to the top surface of the top wall 111 by fasteners 14.

[0068] The portion of the corner protector structure 13 extending to the bottom surface of the bottom wall 113 forms another connecting part 131. This connecting part 131 can be welded to the bottom surface of the bottom wall 113. The connecting part 131 can also be connected to the bottom surface of the bottom wall 113 via a fastener 14.

[0069] The top of the corner protector structure 13 extends beyond the top wall 111 and toward the top surface of the top wall 111; this can be understood as the portion of the corner protector structure 13 extending beyond the top wall 111 and toward the top surface of the top wall 111 intersecting the height direction Z of the battery box 11. For example, the portion of the corner protector structure 13 extending beyond the top wall 111 toward the top surface of the top wall 111 is perpendicular to the height direction Z of the battery box 11 and parallel to the top surface of the top wall 111.

[0070] The bottom end of the corner protector structure 13 extends beyond the bottom wall 113 and towards the bottom surface near the bottom wall 113; this can be understood as the portion of the corner protector structure 13 extending beyond the bottom wall 113 and towards the top surface near the bottom wall 113 intersecting the height direction Z of the battery box 11. For example, the portion of the corner protector structure 13 extending beyond the bottom wall 113 and towards the top surface near the bottom wall 113 is perpendicular to the height direction Z of the battery box 11 and parallel to the top surface of the bottom wall 113.

[0071] In this embodiment, the connection reliability between the corner protection structure 13 and the top wall 111 and / or the bottom wall 113 is further improved, thereby further improving the reliability of the battery box 11, and further improving the reliability of the battery device 1.

[0072] In some embodiments, see Figure 8 The corner protector structure 13 includes two protective parts 132 and two connecting parts 131; the two protective parts 132 intersect and are connected; each connecting part 131 is connected to the two protective parts 132; the connection between the two protective parts 132 is chamfered, and / or the connection between the protective parts 132 and the connecting parts 131 is chamfered.

[0073] In some examples, the connection between the two guard portions 132 is chamfered. In other examples, the connection between the guard portion 132 and the connecting portion 131 is chamfered. In still other examples, the connection between the two guard portions 132 and the connection between the guard portion 132 and the connecting portion 131 is chamfered; in this case, the sharp point formed by the two guard portions 132 and each connecting portion 131 is eliminated. This chamfer can be a rounded corner.

[0074] The two protective portions 132 can be perpendicular. The two protective portions 132 can be fixedly connected, for example, by welding. Each connecting portion 131 can be fixedly connected to both protective portions 132. Specifically, the protective portions 132 are positioned opposite to the side wall 1121, one connecting portion 131 is positioned opposite to the bottom surface of the bottom wall 113, and the other connecting portion 131 is positioned opposite to the top surface of the top wall 111. The shape of the connecting portion 131 can be fan-shaped, rectangular, etc. In some examples, both the protective portions 132 and the connecting portions 131 are plates. Along the height direction Z of the battery housing 11, the two connecting portions 131 are positioned opposite each other.

[0075] In some examples, the corner protection structure 13 is designed to mimic the corner shape of the battery housing 11, meaning that the outer surface of the corner of the battery housing 11 opposite to the corner protection structure 13 has the same outline as the inner surface of the corner protection structure 13.

[0076] In this embodiment, the chamfered joint of the two protective portions 132 reduces the risk of stress concentration at the joint, thereby reducing the risk of breakage at the joint. Similarly, the chamfered joint between the protective portion 132 and the connecting portion 131 reduces the risk of stress concentration at the joint, further reducing the risk of breakage at the joint.

[0077] In some embodiments, the connecting portion 131 is a 90-degree fan shape, with its two straight edges connected to the top edges of the two protective portions 132 respectively.

[0078] In some embodiments, the two protective portions 132 and the two connecting portions 131 are integrally formed structures.

[0079] In this embodiment, the two protective parts 132 and the two connecting parts 131 are integrally formed, which makes the corner protection structure 13 have high strength and stability and extends the service life of the corner protection structure 13.

[0080] In some embodiments, there is a gap between the guard 132 and the sidewall 1121.

[0081] In some examples, the guard 132 contacts the sidewall 1121, meaning there is no gap between them.

[0082] In this embodiment, since there is a gap between the protective part 132 and the side wall 1121, when objects such as sand and gravel hit the protective part 132 of the corner protection structure 13, the protective part 132 deforms to a certain extent toward one side of the side wall 1121 to absorb the impact force of the objects such as sand and gravel, reduce the squeezing force of the protective part 132 on the side wall 1121, thereby reducing the risk of damage to the battery box 11 and improving the reliability of the battery device 1.

[0083] In some embodiments, the top wall 111 extends beyond the side wall 1121 along the direction perpendicular to the height direction Z of the battery housing 11; the two side edges of the guard 132 have protrusions 133 protruding into the frame 112 on the surface near the frame 112.

[0084] The protrusion 133 is disposed opposite to the side wall 1121, meaning that the orthographic projection of the protrusion 133 onto the side wall 1121 is located on the side wall 1121. In some examples, the protrusion 133 is disposed opposite only to the side wall 1121; in this case, the protrusion 133 has no orthographic projection on either the top or bottom wall. For example, the bottom surface of the protrusion 133 is flush with the bottom surface of the side wall 1121, and the height of the protrusion 133 is equal to or less than the height of the side wall 1121. A gap may exist between the protrusion 133 and the side wall 1121, or there may be no gap. In other examples, the protrusion 133 is disposed opposite to both the side wall 1121 and the bottom wall 113. A gap may exist between the protrusion 133 and both the side wall 1121 and the bottom wall 113, or there may be no gap.

[0085] In some examples, the surface of the protrusion 133 near the sidewall 1121 has gaps with both the sidewall 1121 and the bottom sidewall, but the spacing of these gaps is smaller than the spacing between the non-side edge portion of the guard 132 and the sidewall 1121. In other examples, the surface of the protrusion 133 near the sidewall 1121 is in contact with both the sidewall 1121 and the bottom sidewall.

[0086] In some examples, the top of the protrusion 133 contacts or has a gap with the portion of the top wall 111 that extends beyond the side wall 1121. The portion of the top wall 111 extending beyond the side wall 1121 may or may not be bent towards the bottom wall 113.

[0087] In some examples, the edge of the guard 132 is recessed into the frame 112 to form a protrusion 133.

[0088] In the height direction Z of the battery box 11, the bottom surface of the top wall 111 and the top surface of the bottom wall 113 are set opposite to each other, the top surface and the bottom surface of the bottom wall 113 are set opposite to each other, and the bottom surface of the top wall 111 and the top surface of the bottom wall 113 are set opposite to each other.

[0089] In some examples, the two connecting portions 131 contact the top surface of the top wall 111 and the bottom surface of the bottom wall 113, respectively; the portion of the protective portion 132 opposite to the side surface of the top wall 111 contacts the side surface of the top wall 111; the top surface of the protrusion 133 contacts a portion of the bottom surface of the top wall 111; and the surface of the protrusion 133 near the side wall 1121 contacts both the side surface of the side wall 1121 and the bottom surface.

[0090] In this embodiment, the protrusion 133 can reduce the gap between the side edge of the guard 132 and the side wall 1121, thereby reducing the probability of impurities entering the gap between the guard 132 and the side wall 1121, thus extending the service life of the corner protection structure 13 and improving the reliability of the battery device 1.

[0091] In some embodiments, the battery device 1 further includes a fastener 14, one connection portion 131 is connected to the top wall 111 via the fastener 14, and another connection portion 131 is connected to the bottom wall 113 via the fastener 14.

[0092] The corner protector structure 13 is connected to the battery housing 11 by fasteners 14. There can be multiple fasteners 14. In some examples, some fasteners 14 pass sequentially through a connecting portion 131 and the top wall 111, fixing one connecting portion 131 of the corner protector structure 13 to the battery housing. Other fasteners 14 pass sequentially through another connecting portion 131 of the corner protector structure 13 and the bottom wall 113, fixing the other connecting portion 131 of the corner protector structure 13 to the battery housing.

[0093] Fastener 14 can be a rivet, bolt, etc. For example, a rivet can be a blind rivet, etc.

[0094] In this embodiment, the fastener 14 can be used to connect the corner protection structure 13 to the battery box 11, and also facilitates the separation of the corner protection structure 13 from the battery box 11 for replacement and maintenance of the corner protection structure 13 and the battery box 11.

[0095] In some embodiments, there are multiple corner protection structures 13 and multiple corners 114 of the frame 112; the multiple corner protection structures 13 and the multiple corners 114 are arranged in a one-to-one correspondence.

[0096] For example, the frame 112 can be a rectangular frame 112 with four corners 114, and the corresponding number of corner protection structures 13 is also four, with the four corner protection structures 13 respectively set at the four corners 114.

[0097] In this embodiment, multiple corner protection structures 13 can protect multiple corners 114, thereby further improving the reliability of the battery box 11, and further improving the reliability of the battery device 1.

[0098] The above description is merely an embodiment of this application and does not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A battery device, characterized in that, include: The battery housing includes a frame; two adjacent side walls of the frame are intersecting and connected to form a corner; A corner protection structure is located on the outer surface at the corner and is connected to the battery housing; Wherein, along the height direction of the battery housing, the top end of the corner protection structure extends beyond the top end of the side wall; and / or, the bottom end of the corner protection structure extends beyond the bottom end of the side wall.

2. The battery device according to claim 1, characterized in that, The battery housing also includes a top wall and a bottom wall that are disposed opposite to each other along the height direction of the battery housing; the frame is connected between the top wall and the bottom wall; Wherein, along the height direction of the battery box, the top end of the corner protection structure is connected to the top wall; And / or, Along the height direction of the battery box, the bottom end of the corner protection structure is connected to the bottom wall.

3. The battery device according to claim 2, characterized in that, Along the height direction of the battery box, the top end of the corner protection structure extends beyond the top wall and toward the top surface of the top wall; the bottom end of the corner protection structure extends beyond the bottom wall and toward the bottom surface of the bottom wall. The portion of the corner protector structure extending to the top surface of the top wall forms a connection portion that connects to the top surface of the top wall, and the portion of the corner protector structure extending to the bottom surface of the bottom wall forms another connection portion that connects to the bottom surface of the bottom wall.

4. The battery device according to claim 3, characterized in that, The corner protector structure includes two protective parts and two connecting parts; the two protective parts intersect and are connected; each connecting part is connected to both protective parts; the connection between the two protective parts is chamfered, and / or the connection between the protective parts and the connecting parts is chamfered.

5. The battery device according to claim 4, characterized in that, The two protective parts and the two connecting parts are integrally formed.

6. The battery device according to claim 4, characterized in that, There is a gap between the protective part and the side wall.

7. The battery device according to claim 6, characterized in that, Along a direction perpendicular to the height of the battery housing, the top wall extends beyond the side wall; the two side edges of the protective part have protrusions protruding into the frame near the surface of the frame.

8. The battery device according to any one of claims 3 to 7, characterized in that, The battery device also includes fasteners, one of the connecting parts being connected to the top wall via the fasteners, and the other connecting part being connected to the bottom wall via the fasteners.

9. The battery device according to any one of claims 1 to 7, characterized in that, The number of corner protection structures is multiple, and the number of corners of the frame is multiple; the multiple corner protection structures are set one-to-one with the multiple corners.

10. An electrical appliance, characterized in that, include: Electrical components; The battery device according to any one of claims 1 to 9, wherein the battery device is electrically connected to the electrical device.

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