Battery devices, fuse components and electrical equipment

Abstract

The present application relates to a battery device, a fuse assembly and an electrical device. The battery device includes a case, a battery cell and a fuse assembly, wherein the battery cell is arranged in the case; the fuse assembly includes a fuse, a protective box and an air pressure regulating valve, wherein the protective box is at least partially arranged outside the case, and the fuse is arranged in the protective box. The air pressure regulating valve is arranged on the protective box, and is used to actuate to release the internal pressure when the internal pressure of the protective box reaches a threshold value, and the air pressure regulating valve is connected to the outside of the case to release the internal pressure to the outside of the case. In the battery device and electrical device provided by the present application, when the fuse is blown, the sparks or flames generated are blocked in the protective box to prevent the battery cells and other components in the case from being damaged. Furthermore, by at least partially arranging the protective box outside the case, the protective box can be opened from the outside of the case to repair or replace the fuse without disassembling the case, thereby improving the convenience of fuse repair and replacement.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and in particular to a battery device, a fuse assembly and an electrical device. Background Art

[0002] When an overcurrent occurs due to a short circuit of an external cable, etc., a fire may occur inside the battery device. In order to protect the battery device from the overcurrent caused by such an external short circuit, a fuse is generally included in the battery device. When an overcurrent flows, the fuse melts to block the flow of current, thereby preventing a spark from occurring in the battery device.

[0003] However, when the fuse is blown due to overcurrent, sparks or flames may occur, causing damage to other components inside the battery device. Moreover, the fuse is usually arranged inside the battery device, and when the fuse needs to be repaired or replaced, the battery device box needs to be disassembled, which is very inconvenient. Summary of the invention

[0004] Based on this, it is necessary to provide a battery device, a fuse assembly and an electrical device to provide protection for the internal components of the battery device and facilitate the maintenance and replacement of the fuse.

[0005] In a first aspect, the present application provides a battery device, the battery device comprising:

[0006] Box;

[0007] A battery cell is arranged in the box;

[0008] The fuse assembly comprises a fuse and a protection box, wherein the protection box is at least partially arranged outside the box body, and the fuse is arranged inside the protection box.

[0009] In the technical solution of the embodiment of the present application, by setting a fuse assembly, when an overcurrent occurs, the fuse will melt to block the flow of current, thereby providing protection for the battery device. The fuse is set in the protective box. When the fuse melts, the sparks or flames generated by the melting are blocked in the protective box to prevent the battery cells and other components in the box from being damaged. Furthermore, by setting at least part of the protective box outside the box, the protective box can be opened from the outside of the box to repair or replace the fuse without disassembling the box, thereby improving the convenience of fuse repair and replacement.

[0010] In one embodiment, the fuse assembly further includes an air pressure regulating valve, which is disposed on the protective box and is used to be actuated to release the internal pressure when the internal pressure of the protective box reaches a threshold value, and the air pressure regulating valve is connected to the outside of the box to release the internal pressure to the outside of the box.

[0011] In the technical solution of the embodiment of the present application, an air pressure regulating valve is provided on the protective box, which is actuated to release the internal pressure when the internal pressure of the protective box reaches a threshold value, thereby preventing the risk of explosion of the protective box due to excessive internal air pressure, thereby ensuring the safety of the battery device and the electrical equipment using the battery device.

[0012] In one embodiment, the protective box includes:

[0013] A box body, the box body is arranged inside the box body, the fuse is arranged inside the box body, and a first opening communicating with the outside of the box body is arranged on the box body;

[0014] The box cover is arranged on the outside of the box body, the sealing cover is arranged on the first opening, and the air pressure regulating valve is arranged on the box cover.

[0015] In the technical solution of the embodiment of the present application, the protective box is configured to include a box body and a box cover, the fuse is disposed in the box body, the air pressure regulating valve is disposed on the box cover, and the first opening of the box body is sealed by the box cover, so that a sealed space is formed in the protective box. Since the box cover is disposed on the outside of the box body, it is convenient to perform disassembly and installation operations. Compared with the traditional solution of disassembling the upper cover of the box body, since the box cover is smaller in size and weight, disassembly and installation are more convenient.

[0016] In one embodiment, a through opening is provided on the box body, one end of the box body provided with the first opening passes through the through opening, and the box cover is detachably connected to the end of the box body passing through the through opening.

[0017] In the technical solution of the embodiment of the present application, a through hole is provided on the box body so that the box body can pass through the through hole to the outside of the box body, and the box cover is connected to the end of the box body passing through the through hole, so that the box cover can be arranged outside the box body to facilitate the removal and installation operations of the box cover from the outside of the box body.

[0018] In one embodiment, the box cover is connected to the box body by a plurality of first fasteners arranged at intervals.

[0019] In the technical solution of the embodiment of the present application, the connection is relatively firm and the assembly and disassembly is relatively convenient through the connection of multiple first fasteners.

[0020] In one embodiment, a first sealing member is sandwiched between the box cover and the box body.

[0021] In the technical solution of the embodiment of the present application, by sandwiching a first sealing member between the box cover and the box body, the sealing between the box cover and the box body can be ensured, so that a sealed space is formed inside the protective box.

[0022] In one embodiment, the box body is directly or indirectly connected to the inner wall of the box.

[0023] In the technical solution of the embodiment of the present application, since the box cover is arranged outside the box body and needs to be disassembled and removed, it is not convenient to fix the protection box by fixing the box cover. The protection box is fixed by directly or at intervals connecting the box body to the inner wall of the box body, so as to realize the installation of the fuse assembly in the battery device.

[0024] In one embodiment, the box body comprises:

[0025] A housing, wherein one end of the housing is provided with a first opening, and the other end of the housing is provided with a second opening;

[0026] The inner shell is sealed in the outer shell through the second opening, and the inner shell is connected with the first opening. The fuse is arranged in the inner shell.

[0027] In the technical solution of the embodiment of the present application, by setting the box body as a split structure in which the outer shell and the inner shell are socketed, the installation of the fuse in the box body and the installation of the box body in the box body are facilitated.

[0028] In one embodiment, a first flange is provided on one end of the inner shell away from the first opening, the outer shell abuts against the first flange, and the outer shell and the first flange are connected via a plurality of second fasteners arranged at intervals.

[0029] In the technical solution of the embodiment of the present application, the first flange is provided on the inner shell to facilitate the docking between the outer shell and the inner shell, and the first flange plays a role in positioning the outer shell to ensure the assembly accuracy between the outer shells. The outer shell and the first flange are connected by the second fastener to ensure that the outer shells are firmly connected.

[0030] In one embodiment, a second sealing member is sandwiched between the first flange and the housing.

[0031] In the technical solution of the embodiment of the present application, a second sealing member is sandwiched between the first flange edge and the outer shell, which is beneficial to improving the sealing of the connection between the outer shell and the inner shell.

[0032] In one of the embodiments, a connecting boss is provided on the inner wall of the inner shell, and the fuse is connected to the connecting boss via a third fastener.

[0033] In the technical solution of the embodiment of the present application, the inner shell can adopt a thin-walled structure, and only a connecting boss is provided at the connection with the fuse, and a connecting hole is provided on the connecting boss for the third fastener to be screwed in. Such a configuration is conducive to reducing the weight of the inner shell to meet the development trend of lightweight battery devices.

[0034] In one embodiment, a third sealing member is disposed between the box body and the housing.

[0035] In the technical solution of the embodiment of the present application, a third sealing member is sandwiched between the box body and the box body to ensure the sealing between the box body and the box body.

[0036] In one of the embodiments, a sealant is poured between the box body and the box body, and the sealant constitutes a third sealing member.

[0037] In the technical solution of the embodiment of the present application, the sealing method of the sealant has a good sealing effect and is relatively convenient to operate, which is beneficial to improving the assembly efficiency between the box body and the box body.

[0038] In one of the embodiments, the box body is provided with a connecting sleeve, the box body passes through the connecting sleeve, and a third sealing member is sandwiched between the connecting sleeve and the box body.

[0039] In the technical solution of the embodiment of the present application, a connecting sleeve is provided to increase the contact area between the box body and the outer shell, thereby improving the supporting effect on the outer shell, which is beneficial to improving the firmness of the connection between the outer shell and the box body.

[0040] In a second aspect, the present application provides a fuse assembly, which includes a fuse, a protective box and an air pressure regulating valve. The fuse is arranged in the protective box, and the air pressure regulating valve is arranged on the protective box for adjusting the internal air pressure of the protective box.

[0041] The fuse assembly proposed in the present application is arranged in a protective box. When the fuse blows, the sparks or flames generated by the blowing are blocked in the protective box to avoid damage to surrounding equipment. Furthermore, the fuse assembly forms an independent protective space by setting a protective box, which is convenient for installation, maintenance or replacement. By setting an air pressure regulating valve on the protective box, the air pressure in the protective box is adjusted to prevent the risk of explosion of the protective box due to excessive internal air pressure, thereby ensuring the safety of the electrical equipment to which it is applied. The fuse assembly proposed in the embodiment of the present application is not limited to battery devices, but can also be applied to various devices with fusing requirements such as distribution lines, power transformers, voltage transformers, power capacitors, etc.

[0042] In a third aspect, the present application provides an electrical device, which includes the above-mentioned battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 FIG. 1 is a top view of a battery device provided in an embodiment of the present application.

[0044] Figure 2 for Figure 1 Cross-sectional view at AA in the middle.

[0045] Figure 3 It is a three-dimensional structural diagram of a battery device provided in one embodiment of the present application.

[0046] Figure 4 for Figure 3 Enlarged structural diagram of point B in the middle.

[0047] Figure 5 It is a three-dimensional structural diagram of a fuse assembly provided in one embodiment of the present application.

[0048] Figure 6 This is a disassembled structural diagram of a fuse assembly provided in one embodiment of the present application.

[0049] Figure 7 It is a planar structural diagram of a fuse assembly provided in one embodiment of the present application.

[0050] Figure 8 for Figure 7 Cross-sectional view at CC.

[0051] Fig. 9 It is a three-dimensional structural diagram of a box cover provided in one embodiment of the present application.

[0052] Reference numerals:

[0053] 100, box body; 110, box body; 111, connecting sleeve; 120, upper cover; 200, fuse assembly;

[0054] 1. Fuse;

[0055] 2. Protective box; 21. Box body; 211. Outer shell; 2111. First opening; 2112. Second opening; 2113. Second flange edge; 2114. Third flange edge; 2115. First connecting hole; 212. Inner shell; 2121. First flange edge; 2122. Connecting boss; 213. Second fastener; 214. Second sealing member; 22. Box cover; 221. Second connecting hole; 23. First fastener; 24. First sealing member; 25. Third fastener; 26. Third sealing member; 27. Fourth fastener;

[0056] 3. Air pressure regulating valve. DETAILED DESCRIPTION

[0057] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0058] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0059] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0061] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0063] In equipment with explosion hazards such as power batteries, energy storage batteries, electronic appliances, and mechanical devices, the correct selection of suitable explosion-proof electrical appliances to prevent the explosion of surrounding explosive mixtures is an important measure to ensure safe production and prevent explosions and fires.

[0064] Especially in battery devices such as power batteries and energy storage batteries, semi-permanent batteries that convert electrical energy into chemical energy and can be repeatedly charged and discharged are called secondary batteries, to distinguish them from primary batteries that cannot be reused after being used once. Secondary batteries include lithium secondary batteries, nickel-cadmium (Ni-Cd) batteries, lead storage batteries, nickel-metal hydride (Ni-MH) batteries, zinc-air batteries, alkaline manganese batteries, etc. Among them, lead storage batteries and lithium secondary batteries are the most commercially active secondary batteries.

[0065] In particular, lithium secondary batteries have been actively used as electric vehicle batteries in recent years due to their advantages, for example, high energy storage density, potential for lightweight and miniaturization, excellent stability, low discharge rate and long life. For reference, lithium secondary batteries are generally classified into cylindrical, prismatic and pouch types according to manufacturing types. In addition to electric vehicle batteries, their use also involves electronic exchange system (ESS) batteries, other electronic devices, etc.

[0066] Currently, a single lithium secondary battery (battery cell) cannot produce enough output power to drive an electric vehicle. In order to use secondary batteries as energy sources for electric vehicles, it is necessary to configure a battery module in which multiple lithium-ion battery cells are connected in series and / or in parallel, and a battery pack including a battery management system (BMS) that connects the battery modules in series and maintains their functions, a cooling system, a battery pack disconnect unit (BDU), a wiring harness, etc. is usually configured.

[0067] At the same time, when an overcurrent occurs due to a short circuit of an external cable, etc., a fire may occur inside the battery module. When an external short circuit test is performed in a battery cell unit, gas is generated inside the battery due to the heating of the internal electrode and the evaporation of the electrolyte, so the soft pack seal opens the cell lead part due to the increase in internal pressure and heat, and discharges the gas to the outside. At this time, when the discharged gas encounters a spark generated at the cell lead of the battery cell, the flame increases.

[0068] In order to protect the battery module from the occurrence of overcurrent caused by such an external short circuit, a fuse is generally included in the battery module. When an overcurrent flows, the fuse melts to block the flow of current, thereby preventing gas discharge or sparks in the battery cell from occurring.

[0069] In traditional battery devices, the fuse is set inside the battery pack. When the fuse is damaged, the upper cover of the battery pack needs to be disassembled. The upper cover of the battery pack is large in size and weight, and it is time-consuming and laborious to disassemble and assemble. Especially for the power battery in the vehicle, when repairing and replacing the fuse, it is even necessary to separate the entire power battery from the vehicle body, and remove the upper cover of the power battery system by removing dozens of bolts before replacing the fuse inside the battery. The operation takes a long time, easily causes the power battery seal to fail, and there are high-voltage safety risks such as electric shock when operating inside the power battery.

[0070] There is another safety issue with battery devices with fuses installed inside the battery pack. When the fuse blows, sparks or flames will be generated, which will damage the internal circuits and battery cells of the battery pack, and will also cause the internal gas pressure of the battery pack to increase, posing a risk of explosion.

[0071] Based on the above considerations, if Figure 1-Figure 4 As shown, an embodiment of the present application provides a battery device, which includes a case 100, a battery cell and a fuse assembly 200, wherein the battery cell is arranged in the case 100; the fuse assembly 200 includes a fuse 1 and a protective box 2, wherein the protective box 2 is at least partially arranged outside the case 100, and the fuse 1 is arranged in the protective box 2.

[0072] The battery device proposed in the embodiment of the present application is provided with a fuse assembly 200. When an overcurrent occurs, the fuse 1 will melt to block the flow of current, thereby providing protection for the battery device. The fuse 1 is arranged in the protective box 2. When the fuse 1 melts, the sparks or flames generated by the melting are blocked in the protective box 2 to prevent the battery cells and other components in the box 100 from being damaged. Furthermore, by setting at least part of the protective box 2 outside the box 100, the protective box 2 can be opened from the outside of the box 100 to repair or replace the fuse 1 without disassembling the box 100, thereby improving the convenience of repairing and replacing the fuse 1.

[0073] In one embodiment, the fuse assembly 200 also includes an air pressure regulating valve 3, which is disposed on the protective box 2 and is used to actuate to release the internal pressure when the internal pressure of the protective box 2 reaches a threshold value, and the air pressure regulating valve 3 is connected to the outside of the box body 100 to release the internal pressure to the outside of the box body 100.

[0074] When the internal pressure of the protection box 2 reaches a threshold, an explosion may occur, so when the threshold is reached, pressure relief is required to prevent the explosion. By arranging the air pressure regulating valve 3 on the protection box 2, the air pressure regulating valve 3 is actuated to release the internal pressure when the internal pressure of the protection box 2 reaches a threshold, thereby preventing the risk of explosion of the protection box 2 due to excessive internal air pressure, thereby ensuring the safety of the battery device and the electrical equipment using the battery device.

[0075] In one embodiment, if Figure 2 As shown, most of the fuse assembly 200 is arranged inside the box 100, and only one side where the air pressure regulating valve 3 is arranged is exposed from the box 100. The box 100 provides protection for the fuse assembly 200 and can maintain the regularity of the shape of the battery device, which is beneficial to the transportation of the battery device or the assembly in the electrical equipment.

[0076] In some other embodiments, the fuse assembly 200 may be arranged outside the box 100, and the fuse assembly 200 does not occupy the internal space of the box 100, which is more conducive to the arrangement of battery cells and other electrical components in the box 100. In actual working conditions, according to the application scenario of the battery device, it is flexibly selected to arrange the fuse assembly 200 outside or inside the box 100.

[0077] Specifically, combined Figure 3 and Figure 4 As shown, the box body 100 includes a box body 110 and an upper cover 120, and the upper cover 120 is arranged at an opening at one end of the box body 110. The upper cover 120 is connected to the box body 110 by a plurality of bolts. In order to facilitate the installation of the protection box 2, a through hole is provided on the box body 100, and the protection box 2 is arranged in the through hole, and the air pressure regulating valve 3 is exposed from the through hole, so that the heat in the protection box 2 can be dissipated to the outside of the box body 100 in time.

[0078] Fuse 1 often needs to be repaired or replaced. In a traditional battery device, fuse 1 is installed inside the box 100. The upper cover 120 needs to be removed before fuse 1 can be removed and installed. The upper cover 120 is connected to the box body 110 by dozens of bolts. All these bolts need to be removed, which takes a long time to operate and easily causes the seal failure of the power battery system. In particular, for battery devices in vehicles, the entire battery device needs to be separated from the vehicle body before fuse 1 can be replaced and repaired, which is very complicated.

[0079] In order to solve the above problems, the structure of the protection box 2 and the installation method of the protection box 2 in the box body 100 are improved in the embodiment of the present application. Figure 3 , Figure 5 and Figure 6The protective box 2 includes a box body 21 and a box cover 22. The box body 21 is arranged inside the box body 100. The fuse 1 is arranged inside the box body 21. The box body 21 is provided with a first opening 2111 communicating with the outside of the box body 100. The box cover 22 is arranged outside the box body 100, and a sealing cover is arranged on the first opening 2111. The air pressure regulating valve 3 is arranged on the box cover 22.

[0080] By configuring the protection box 2 to include a box body 21 and a box cover 22, the fuse 1 is configured in the box body 21, the air pressure regulating valve 3 is configured on the box cover 22, and the first opening 2111 of the box body 21 is sealed by the box cover 22, so that a sealed space is formed in the protection box 2. Since the box cover 22 is configured on the outside of the box body 100, it is convenient to perform disassembly and installation operations. Compared with the traditional solution of disassembling the upper cover 120 of the box body 100, since the box cover 22 is smaller in volume and weight, it is more convenient to disassemble and install.

[0081] Specifically, the box body 100 is provided with a through hole, one end of the box body 21 provided with the first opening 2111 passes through the through hole, and the box cover 22 is detachably connected to the end of the box body 21 passing through the through hole.

[0082] By setting a through hole on the box body 100, the box body 21 passes through the through hole to the outside of the box body 100, and the box cover 22 is connected to the end of the box body 21 passing through the through hole, so that the box cover 22 can be set outside the box body 100 to facilitate the removal and installation operations of the box cover 22 from the outside of the box body 100.

[0083] Among them, refer to Figure 1 and Figure 2 The through-hole is located on the box body 110, and the box body 110 and the upper cover 120 jointly surround the through-hole, and the inner wall of the upper cover 120 is a part of the inner wall of the through-hole. When the upper cover 120 is opened, the through-hole is exposed toward one side of the upper cover 120, so that the protective box 2 can be placed into the through-hole from one side of the upper cover 120.

[0084] In one embodiment, the box cover 22 is connected to the box body 21 through a plurality of first fasteners 23 arranged at intervals. Specifically, the box cover 22 is provided with a plurality of second connection holes 221, and the first fasteners 23 pass through the second connection holes 221 and the connection holes on the box body 21 to achieve connection and fixation of the box cover 22 and the box body 21. The first fasteners 23 can be bolts, screws or buckles. The connection method of connecting with a plurality of first fasteners 23 is relatively firm and convenient for disassembly and assembly.

[0085] In one embodiment, if Figure 4As shown, the box cover 22 is set to be rectangular, and six first fasteners 23 are provided, wherein one first fastener 23 is provided at each of the four corners of the box cover 22 , and the other two first fasteners 23 are provided in the middle of the long side of the box cover 22 .

[0086] See also Figure 7-Figure 9 In order to ensure the sealing between the box cover 22 and the box body 21, a first sealing member 24 is sandwiched between the box cover 22 and the box body 21. The first sealing member 24 can be a sealing ring or a sealant, which can seal the connection between the box cover 22 and the box body 21. The specific structural form of the first sealing member 24 is not limited here.

[0087] Since one end of the box body 21 connected to the box cover 22 extends out of the box body 100, the connection between the box cover 22 and the box body 21 is also located outside the box body 100 and is not protected by the box body 100. In the embodiment of the present application, by sandwiching the first sealing member 24 between the box cover 22 and the box body 21, the sealing between the box cover 22 and the box body 21 is improved, so that the sealing of the protection box 2 itself can be ensured, and a good protection effect is formed on the components such as the fuse 1 and the air pressure regulating valve 3 inside the protection box 2.

[0088] Since the box cover 22 is arranged outside the box body 100 and needs to be disassembled and removed, it is inconvenient to fix the protection box 2 by fixing the box cover 22. Therefore, the box body 21 is directly or indirectly connected to the inner wall of the box body 100.

[0089] In one embodiment, the box body 21 can be directly welded or bonded to the inner wall of the box body 100. In some other embodiments, the box body 21 can also be directly connected and fixed to the inner wall of the box body 100 by bolts or screws. According to the spatial layout in the box body 100, for the convenience of installation, an auxiliary mounting frame can also be provided in the box body 100, and the box body 21 can be fixed to the auxiliary mounting frame by bonding, welding or fastener connection.

[0090] In one embodiment, in combination Figure 2 , Figure 6 and Figure 8 The box body 21 includes an outer shell 211 and an inner shell 212. One end of the outer shell 211 is provided with a first opening 2111, and the other end of the outer shell 211 is provided with a second opening 2112. The inner shell 212 is sealed and sleeved in the outer shell 211 through the second opening 2112, and the inner shell 212 is connected to the first opening 2111. The fuse 1 is arranged in the inner shell 212, and the box cover 22 is connected to the outer shell 211. By setting the box body 21 as a split structure in which the outer shell 211 and the inner shell 212 are sleeved, the installation of the fuse 1 in the box body 21 and the installation of the box body 21 in the box body 100 are facilitated.

[0091] Specifically, the inner shell 212 and the box cover 22 can be made of plastic material to ensure good insulation. The outer shell 211 is connected to the box body 100, and the outer shell 211 can be made of cast aluminum or aluminum alloy to ensure good structural strength.

[0092] In order to facilitate the connection between the inner shell 212 and the outer shell 211, a first flange 2121 is provided on one end of the inner shell 212 away from the first opening 2111, and the outer shell 211 abuts against the first flange 2121. The outer shell 211 and the first flange 2121 are connected by a plurality of second fasteners 213 arranged at intervals. The second fasteners 213 can be bolts or screws.

[0093] The first flange 2121 is provided on the inner shell 212 to facilitate the docking between the outer shell 211 and the inner shell 212, and the first flange 2121 plays a role in positioning the outer shell 211 to ensure the assembly accuracy between the outer shells 211 and 211. After the outer shell 211 and the first flange 2121 are connected by the second fastener 213, the outer shells 211 and 211 are ensured to be firmly connected.

[0094] In order to facilitate the connection between the shell 211 and the first flange edge 2121, a second flange edge 2113 is provided on the shell 211 corresponding to the first flange edge 2121. The second flange edge 2113 abuts against the first flange edge 2121, and the second fastener 213 passes through the first flange edge 2121 and the second flange edge 2113 in sequence for connection and fixing.

[0095] In order to ensure the sealing of the connection between the outer shell 211 and the inner shell 212, a second sealing member 214 is sandwiched between the first flange 2121 and the outer shell 211. The second sealing member 214 can be a sealing ring or a sealant, which can seal the connection between the first flange 2121 and the outer shell 211. The specific structural form of the second sealing member 214 is not limited here.

[0096] The second seal 214 is provided to improve the sealing performance of the connection between the outer shell 211 and the inner shell 212 , thereby preventing the high-temperature and high-pressure gas generated when the fuse 1 is blown from flowing out of the gap between the outer shell 211 and the inner shell 212 and damaging the battery cells in the box 100 .

[0097] In one embodiment, in order to facilitate installation of the fuse 1 in the inner shell 212, a connecting boss 2122 is provided on the inner wall of the inner shell 212, and the fuse 1 is connected to the connecting boss 2122 via a third fastener 25. The third fastener 25 can be a bolt or a screw.

[0098] The inner shell 212 can adopt a thin-walled structure, and only a connecting boss 2122 is provided at the connection with the fuse 1, and a connecting hole is provided on the connecting boss 2122 for the third fastener 25 to be screwed in. Such a configuration is conducive to reducing the weight of the inner shell 212 to cope with the lightweight development direction of the battery device.

[0099] In one embodiment, if Figure 2 and Figure 6 As shown, in order to facilitate the connection between the shell 211 and the box cover 22, a third flange 2114 is provided at one end of the shell 211 provided with the second opening 2112, and the first fastener 23 is screwed into the third flange 2114 to achieve the connection and fixation of the box cover 22 and the shell 211. When the protective box 2 is assembled to the box body 100, the third flange 2114 is located outside the box body 100 to facilitate the connection with the box cover 22 and the removal of the box cover 22.

[0100] Optionally, see Figure 2 When the protective box 2 is assembled to the box body 100 , the third flange edge 2114 is in contact with the outer side surface of the box body 100 , so that the third flange edge 2114 plays a positioning role to limit the relative position between the box body 21 and the box body 100 .

[0101] In one embodiment, in combination Figure 2 and Figure 6 As shown, the housing 211 is connected to the box body 110 through a plurality of fourth fasteners 27, and a plurality of first connection holes 2115 are provided on the housing 211. The fourth fasteners 27 pass through the box body 110 and the first connection holes 2115 to fix the housing 211. The fourth fasteners 27 can be bolts or screws. Specifically, the fourth fasteners 27 are connected to the position between the second flange edge 2113 and the third flange edge 2114. Through the positioning effect of the third flange edge 2114, the assembly position of the housing 211 on the box body 110 is more accurate, so that the housing 211 can be ensured to be aligned with the connection holes on the box body 110, so that the fourth fasteners 27 can be screwed in smoothly.

[0102] In order to ensure the sealing between the box body 21 and the box body 100, a third sealing member 26 is sandwiched between the box body 21 and the box body 100. By providing the third sealing member 26, the sealing of the connection between the box body 21 and the box body 100 is improved, which is conducive to ensuring the sealing of the box body 100, thereby forming a good protection effect on the battery monomer of the box body 100.

[0103] In one embodiment, sealant is filled between the box body 21 and the box body 100, and the sealant constitutes the third sealing member 26. The sealing method of the sealant has a good sealing effect and is easy to operate, which is conducive to improving the assembly efficiency between the box body 21 and the box body 100.

[0104] In some other embodiments, the third sealing member 26 may also be a sealing ring, and the specific sealing method of the third sealing member 26 is not limited.

[0105] In one embodiment, if Figure 2 As shown, in order to facilitate the fixing of the shell 211, a connecting sleeve 111 is provided on the box body 100, and the box body 21 passes through the connecting sleeve 111, and a third sealing member 26 is sandwiched between the connecting sleeve 111 and the box body 21. Specifically, the connecting sleeve 111 is arranged around the through opening, and the shell 211 passes through the connecting sleeve 111.

[0106] By providing the connecting sleeve 111 , the contact area between the box body 100 and the outer shell 211 is increased to enhance the supporting effect on the outer shell 211 , which is beneficial to enhance the firmness of the connection between the outer shell 211 and the box body 100 .

[0107] According to some embodiments of the present application, Figure 2-Figure 4 As shown, the present application provides a battery device, which includes a box 100 and a fuse assembly 200. The fuse assembly 200 includes a fuse 1, a protective box 2 and an air pressure regulating valve 3. The protective box 2 is connected to the box 100, and the fuse 1 is arranged in the protective box 2. The air pressure regulating valve 3 is arranged on the protective box 2 for adjusting the internal air pressure of the protective box 2, and the air pressure regulating valve 3 is connected to the outside of the box 100. By arranging the fuse assembly 200, when an overcurrent occurs, the fuse 1 will melt to block the flow of current, thereby providing protection for the battery device. The fuse assembly 200 includes a fuse 1, a protective box 2 and an air pressure regulating valve 3. The fuse 1 is arranged in the protective box 2, and by arranging the air pressure regulating valve 3 on the protective box 2, the air pressure in the protective box 2 is adjusted to prevent the protective box 2 from exploding due to excessive internal air pressure, thereby ensuring the safety of the battery device and the electrical equipment using the battery device.

[0108] The embodiment of the present application also provides a fuse assembly 200, which includes a fuse 1, a protective box 2 and an air pressure regulating valve 3. The fuse 1 is arranged in the protective box 2, and the air pressure regulating valve 3 is arranged on the protective box 2 for adjusting the internal air pressure of the protective box 2.

[0109] In the fuse assembly 200 proposed in the present application, the fuse 1 is arranged in the protective box 2. When the fuse 1 blows, the sparks or flames generated by the blowing are blocked in the protective box 2 to avoid damage to surrounding equipment. Furthermore, the fuse assembly 200 forms an independent protective space by setting the protective box 2, which is convenient for installation, maintenance or replacement. By setting the air pressure regulating valve 3 on the protective box 2, the air pressure in the protective box 2 is adjusted to prevent the risk of explosion of the protective box 2 due to excessive internal air pressure, thereby ensuring the safety of the electrical equipment to which it is applied.

[0110] It should be noted that the specific structure of the fuse assembly 200 refers to the description of the fuse assembly 200 in the aforementioned battery device, and will not be repeated here. However, the fuse assembly 200 proposed in the embodiment of the present application is not limited to being applicable to battery devices, but can also be applicable to various devices with fuse requirements such as power distribution lines, power transformers, voltage transformers, power capacitors, etc.

[0111] The embodiment of the present application further provides an electric device, which includes the battery device as described above. The electric device may be an energy storage power supply system, an electric vehicle, military equipment, aerospace equipment, etc.

[0112] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0113] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, characterized in that: The battery device comprises: Box (100); A battery cell, arranged in the box (100); A fuse assembly (200), the fuse assembly (200) comprising a fuse (1) and a protection box (2), the protection box (2) being at least partially arranged outside the box (100), and the fuse (1) being arranged inside the protection box (2); The fuse assembly (200) further comprises an air pressure regulating valve (3), which is arranged on the protection box (2) and is used to be actuated to release the internal pressure when the internal pressure of the protection box (2) reaches a threshold value, and the air pressure regulating valve (3) is connected to the outside of the box (100) to release the internal pressure to the outside of the box (100); The protective box (2) comprises: A box body (21), the box body (21) being arranged inside the box body (100), the fuse (1) being arranged inside the box body (21), and the box body (21) being provided with a first opening (2111) communicating with the outside of the box body (100); A box cover (22), the box cover (22) being arranged on the outside of the box body (100), and a sealing cover being arranged on the first opening (2111), and the air pressure regulating valve (3) being arranged on the box cover (22); The box body (21) comprises: A housing (211), wherein one end of the housing (211) is provided with the first opening (2111), and the other end of the housing (211) is provided with a second opening (2112); an inner shell (212), the inner shell (212) being sealed and sleeved in the outer shell (211) through the second opening (2112), the inner shell (212) being connected to the first opening (2111), and the fuse (1) being arranged in the inner shell (212); The inner shell (212) is made of plastic material, and the outer shell (211) is made of metal material.

2. The battery device according to claim 1, characterized in that: The box body (100) is provided with a through opening, and one end of the box body (21) provided with the first opening (2111) passes through the through opening, and the box cover (22) is detachably connected to the end of the box body (21) passing through the through opening.

3. The battery device according to claim 2, characterized in that: The box cover (22) is connected to the box body (21) via a plurality of first fasteners (23) arranged at intervals.

4. The battery device according to claim 2, characterized in that: A first sealing member (24) is sandwiched between the box cover (22) and the box body (21).

5. The battery device according to claim 3, characterized in that: The box body (21) is directly or indirectly connected to the inner wall of the box body (100).

6. The battery device according to any one of claims 1 to 5, characterized in that: A first flange edge (2121) is provided on one end of the inner shell (212) facing away from the first opening (2111), the outer shell (211) abuts against the first flange edge (2121), and the outer shell (211) and the first flange edge (2121) are connected via a plurality of second fasteners (213) arranged at intervals.

7. The battery device according to claim 6, characterized in that: A second sealing member (214) is sandwiched between the first flange edge (2121) and the housing (211).

8. The battery device according to claim 1, characterized in that: A connecting boss (2122) is provided on the inner wall of the inner shell (212), and the fuse (1) is connected to the connecting boss (2122) via a third fastener (25).

9. The battery device according to any one of claims 1 to 5, characterized in that: A third sealing member (26) is sandwiched between the box body (21) and the box body (100).

10. The battery device according to claim 9, characterized in that: A sealant is filled between the box body (21) and the box body (100), and the sealant constitutes the third sealing member (26).

11. The battery device according to claim 9, characterized in that: The box body (100) is provided with a connecting sleeve (111), the box body (21) passes through the connecting sleeve (111), and the third sealing member (26) is sandwiched between the connecting sleeve (111) and the box body (21).

12. A fuse assembly, characterized in that: The fuse assembly comprises a fuse (1), a protection box (2) and an air pressure regulating valve (3); the fuse (1) is arranged in the protection box (2); the air pressure regulating valve (3) is arranged on the protection box (2) and is used to adjust the internal air pressure of the protection box (2); The protective box (2) comprises: A box body (21), the fuse (1) being arranged in the box body (21), and a first opening (2111) being arranged on the box body (21); A box cover (22), wherein a sealing cover is arranged on the first opening (2111), and the air pressure regulating valve (3) is arranged on the box cover (22); The box body (21) comprises: A housing (211), wherein one end of the housing (211) is provided with the first opening (2111), and the other end of the housing (211) is provided with a second opening (2112); an inner shell (212), the inner shell (212) being sealed and sleeved in the outer shell (211) through the second opening (2112), the inner shell (212) being connected to the first opening (2111), and the fuse (1) being arranged in the inner shell (212); The inner shell (212) is made of plastic material, and the outer shell (211) is made of metal material.

13. An electrical equipment, characterized in that: The electrical equipment comprises the battery device according to any one of claims 1-11.

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