Fuse, battery device, electric device and energy storage device

Abstract

The utility model discloses a fuse, a battery device, a power utilization device and an energy storage device, the fuse comprises a conductor assembly, the conductor assembly comprises a signal melt, a conductor piece and an external conductor, and the conductor piece and the external conductor are connected through the signal melt; the heat dissipation piece is arranged on one side, in the first direction, of the conductor assembly and used for dissipating heat for the signal melt; and at least part of the injection molding part is arranged between the heat dissipation part and the conductor assembly so as to separate the heat dissipation part from the conductor assembly. According to the technical scheme, the injection molding part is arranged, and at least part of the injection molding part is arranged between the heat dissipation part and the conductor assembly to separate the heat dissipation part from the conductor assembly, so that the risk of insulation failure between the heat dissipation part and the conductor assembly can be reduced, the insulation performance between the heat dissipation part and the conductor assembly is improved, and the fault risk of short circuit is reduced; and the reliability and the stability of the breaking of the fuse are ensured.

Description

Technical Field

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

[0002] In power systems, fuses are important protective electrical appliances, playing a crucial role in short-circuit protection. Their working principle is that when an overload or short circuit occurs in the circuit, causing a sharp increase in current, the signal element inside the fuse quickly melts, thereby cutting off the circuit and protecting electrical equipment from damage.

[0003] In related technologies, heat sinks are installed to effectively dissipate heat from the signal fuse. However, the insulating film between the heat sink and the conductive copper busbar is prone to failure, leading to external short circuit faults and seriously interfering with the normal breaking function of the fuse. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a fuse, and a battery device, electrical device, and energy storage device including the fuse. The fuse can reduce the risk of insulation failure between the heat sink and the conductor assembly, ensure the reliability and stability of the fuse's tripping, and reduce the risk of short circuit failure.

[0005] In a first aspect, embodiments of this application provide a fuse, comprising: a conductor assembly, the conductor assembly including a signal fuse element, a conductor member and an external conductor, the conductor member and the external conductor being connected through the signal fuse element; a heat sink element disposed on one side of the conductor assembly in a first direction for dissipating heat from the signal fuse element; and an injection molded part, at least a portion of which is disposed between the heat sink element and the conductor assembly to separate the heat sink element from the conductor assembly.

[0006] In the above technical solution, by setting an injection molded part and placing at least a portion of the injection molded part between the heat sink and the conductor assembly to separate the heat sink and the conductor assembly, the risk of insulation failure between the heat sink and the conductor assembly can be reduced, the insulation performance between the heat sink and the conductor assembly can be improved, the risk of short circuit can be reduced, and the reliability and stability of the fuse breaking can be ensured.

[0007] In some embodiments, the injection molded part is integrally injection molded with the conductor and / or external conductor.

[0008] In the above technical solution, since the injection-molded part is integrally injection molded with the conductor and / or external conductor, on the one hand, the number of parts and assembly steps can be reduced, production efficiency can be improved, and labor costs and the probability of assembly errors can be reduced. On the other hand, the injection-molded part can provide structural support for the conductor and / or external conductor, improve the structural strength and stability of the conductor and / or external conductor, improve the vibration resistance of the conductor assembly, thereby reducing the risk of the signal fuse melting prematurely due to external forces, and improving the reliability and stability of the fuse's tripping.

[0009] In some embodiments, at least a portion of the conductor and / or at least a portion of the external conductor are enclosed within the injection-molded part.

[0010] In the above technical solution, encasing at least a portion of the conductor and / or external conductor within the injection molded part can further improve the insulation performance between the conductor and external conductor and other components of the fuse, enhance the stability and reliability of the fuse operation, further strengthen the structural strength of the conductor and / or external conductor through the injection molded part, reduce the risk of the signal fuse melting prematurely due to external force, and reduce the contact area between the conductor and external conductor and the air or environment, thereby extending the service life of the conductor and external conductor.

[0011] In some embodiments, the conductor and the external conductor are arranged along a second direction that intersects with the first direction. In a projection plane perpendicular to the first direction, the projections of the ends of the conductor and the external conductor that are opposite to each other in the second direction are located outside the projection of the injection molded part.

[0012] In the above technical solution, by having the ends of the conductor and the external conductor both extend out of the injection molded part, it is possible to improve the insulation performance between the conductor assembly and the heat sink, and facilitate the connection of the conductor and the external conductor to the electrical connection parts outside the fuse, thereby improving assembly efficiency.

[0013] In some embodiments, a clearance groove is formed on the injection molded part, which faces the opening of the heat sink, the signal melt is disposed in the clearance groove, and the heat sink is supported on the periphery of the clearance groove.

[0014] In the above technical solution, by setting a clearance groove on the injection molded part, the signal melt can be easily connected to the conductor and external conductor injected into the injection molded part. At the same time, the clearance groove can directly transfer the heat of the signal melt to the heat dissipation component, improve the heat dissipation efficiency of the heat dissipation component for the signal melt, and enable the signal melt to work in a suitable temperature range.

[0015] In some embodiments, a cavity is defined within the heat sink, and the cavity communicates with a relief groove. Both the cavity and the relief groove are filled with arc-quenching sand.

[0016] In the above technical solution, by filling the cavity and clearance groove of the heat sink with arc-extinguishing sand, the arc-extinguishing sand can quickly transfer the heat of the signal fuse to the heat sink, improve the heat dissipation efficiency of the signal fuse, effectively reduce the working temperature of the signal fuse, extend its service life, and ensure the stable operation of the signal fuse. Furthermore, when a short circuit or other fault occurs in the circuit and the signal fuse melts and generates an arc, the arc-extinguishing sand can quickly absorb the arc energy, suppress the continuous burning and expansion of the arc, play a highly efficient arc-extinguishing role, and greatly improve the reliability of the fuse in breaking fault current.

[0017] In some embodiments, a sand-filling hole communicating with the cavity is formed on the side of the heat sink away from the relief groove, and the fuse also includes a sealing member that seals the sand-filling hole.

[0018] In the above technical solution, by forming a sand filling hole on the side of the heat sink away from the relief groove, the arc-extinguishing sand can be easily poured into the cavity and the relief groove, improving assembly efficiency. By setting a plug, the probability of arc-extinguishing sand leakage can be reduced, and the sealing performance of the heat sink can be improved.

[0019] In some embodiments, there are multiple sand filling holes, which are arranged at intervals, and the sealing element corresponds to each sand filling hole.

[0020] In the above technical solution, by setting multiple spaced sand filling holes, the arc-extinguishing sand can be filled into the cavity of the heat sink more evenly and efficiently, thereby improving the sand filling efficiency and optimizing the heat dissipation and arc extinguishing performance of the heat sink.

[0021] In some embodiments, the heat sink includes a first heat sink and a second heat sink, the first heat sink defining a cavity that is open on both sides in a first direction, one opening of the cavity facing a relief groove, and the second heat sink covering the other opening of the cavity.

[0022] In the above technical solution, the heat sink includes a first heat sink and a second heat sink, which can reduce the processing difficulty and processing cost of the heat sink.

[0023] In some embodiments, the first heat sink is an aluminum or ceramic component, and / or the second heat sink is an aluminum or ceramic component.

[0024] In the above technical solution, the first heat sink and the second heat sink are made of aluminum or ceramic, which can improve the heat dissipation efficiency of the heat sink and improve the heat dissipation effect on the signal fuse, so that the fuse can operate stably and reliably.

[0025] In some embodiments, the heat sink is integrally formed.

[0026] In the above technical solution, the heat sink is integrally molded, which can reduce the number of parts, improve assembly efficiency, improve heat conduction efficiency, and enhance the heat dissipation effect on the signal melt.

[0027] In some embodiments, the heat sink is made of aluminum or ceramic.

[0028] In the above technical solution, the heat sink is made of aluminum or ceramic, which can improve the heat dissipation efficiency of the heat sink, improve the heat dissipation effect on the signal fuse, and enable the fuse to operate stably and reliably.

[0029] In some embodiments, the injection molded part is formed with a through hole extending through the injection molded part in a first direction, the conductor has a structurally weak section, the structurally weak section is provided with a structurally weak area, the structurally weak area is exposed at the through hole position, and the fuse further includes: a breaking device, the breaking device is provided on one side of the conductor assembly in the first direction and is configured to be movable in the first direction for cutting the conductor at the structurally weak area position.

[0030] In the above technical solution, by forming through holes on the injection molded part to expose the structural weak area of ​​the conductor, it is convenient for the breaking device to directly impact the structural weak area and cut the conductor when it is pushed. As a result, the breaking device can accurately cut the structural weak section at a specific position, improve the reliability and consistency of the cutting, accurately control the circuit opening and closing, and reduce unnecessary damage to other parts of the conductor, as well as reduce other faults or damage that may be caused by the cutting process.

[0031] In some embodiments, the fuse further includes a gas generator configured to push the breaking device along a first direction upon triggering.

[0032] In the above technical solution, by setting a gas generator to drive the interruption device, the fuse structure can be simplified and the response speed of the fuse to cut off the circuit can be effectively improved.

[0033] In some embodiments, the fuse further includes: an assembly housing connected to and disposed on one side of the injection molded part in a first direction, defining an assembly cavity, and a breaking device disposed within the assembly cavity.

[0034] In the above technical solution, by setting an assembly shell that defines the assembly cavity, the assembly shell can provide a space for accommodating and assembling the fuse components. The compact structure can also isolate the fuse components from the external environment and improve the service life of the components.

[0035] In some embodiments, the assembly housing defines a mounting groove spaced apart from the assembly cavity, the mounting groove extending through the assembly housing in a first direction, and a heat sink disposed within the mounting groove.

[0036] In the above technical solution, by placing the heat sink in the mounting groove of the assembly shell, it is not only convenient to fix the heat sink and compact the fuse structure, but also to isolate the heat sink from the components in the assembly cavity, reducing the impact of the heat sink's heat on the components in the assembly cavity. In addition, it is convenient to dissipate the heat of the heat sink to the external environment, thereby improving the heat dissipation efficiency of the heat sink.

[0037] In some embodiments, the heat sink and the assembly housing are integrally injection molded.

[0038] In the above technical solution, the heat sink and the assembly shell are integrally injection molded, which can improve the connection strength between the heat sink and the assembly shell, reduce the number of fuse parts, and improve assembly efficiency.

[0039] In some embodiments, the fuse further includes: an arc-extinguishing shell, which is connected to the injection molded part and disposed on the side of the injection molded part away from the assembly shell in a first direction, and defines an arc-extinguishing cavity, which communicates with a through hole, and the breaking device is adapted to move through the through hole to the arc-extinguishing cavity.

[0040] In the above technical solution, the arc-extinguishing shell and the through hole on the injection molded part cooperate with each other to accurately guide the action of the interruption device, ensure efficient connection between the circuit cutting and the arc extinguishing process, shorten the fault response time, and the independent arc-extinguishing cavity can effectively isolate the arc and improve the reliability of the fuse operation.

[0041] In some embodiments, the assembly housing, injection molded part, and arc-extinguishing housing are detachably connected.

[0042] In the above technical solution, the assembly shell, injection molded part and arc-extinguishing shell are detachably connected, which can facilitate the assembly, disassembly and maintenance of the fuse and improve the efficiency of assembly, disassembly and maintenance. The separate assembly shell, injection molded part and arc-extinguishing shell can also reduce the production difficulty of the fuse and improve production efficiency.

[0043] In some embodiments, the fuse further includes a cover plate, wherein the assembly housing is open on a side opposite to the injection molded part in a first direction, and the cover plate covers the open side of the assembly housing.

[0044] In the above technical solution, by setting a cover plate, it is possible to easily block dust, moisture and other impurities from entering the assembly cavity, reduce the probability of the performance of key components such as circuit boards and gas generators in the assembly cavity being degraded due to corrosion, reduce the occurrence of short circuits and other faults, and improve the operational stability of the fuse.

[0045] Secondly, embodiments of this application provide a battery device, which includes: a housing, a battery cell assembly, and a fuse according to the first aspect of this application. Both the battery cell assembly and the fuse are disposed within the housing, and the fuse is electrically connected to the battery cell assembly.

[0046] In the above-mentioned technical approach, by setting the fuse of the first aspect, the fuse includes an injection molded part, and at least a portion of the injection molded part is disposed between the heat sink and the conductor assembly to separate the heat sink and the conductor assembly, the risk of insulation failure between the heat sink and the conductor assembly can be reduced, the insulation performance between the heat sink and the conductor assembly can be improved, the risk of short circuit failure can be reduced, the reliability and stability of fuse breaking can be ensured, and the overall performance of the battery device can be improved.

[0047] Thirdly, embodiments of this application provide an electrical device that includes a battery device according to the second aspect of this application.

[0048] In the above technical solution, the overall performance of the electrical device is improved by incorporating the aforementioned battery device.

[0049] Fourthly, embodiments of this application provide an energy storage device, including a battery device according to the second aspect of this application.

[0050] In the above embodiments, by providing the battery device described in the second aspect, the overall performance of the energy storage device is improved.

[0051] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of a vehicle according to an embodiment of this application;

[0053] Figure 2 This is an exploded view of a battery device according to an embodiment of this application;

[0054] Figure 3 This is an exploded view of a fuse according to an embodiment of this application;

[0055] Figure 4 This is a schematic diagram of the second heat sink of a fuse according to an embodiment of this application;

[0056] Figure 5 This is a schematic diagram of the conductor component of a fuse according to an embodiment of this application;

[0057] Figure 6 This is a schematic diagram of the signal fuse element of a fuse according to an embodiment of this application.

[0058] Figure label:

[0059] 1. Electrical appliances;

[0060] 1000, Battery assembly; 2000, Controller; 3000, Motor;

[0061] 300, battery cell; 200, casing; 210, first casing; 220, second casing;

[0062] 100. Fuse; 10. Conductor assembly;

[0063] 11. Signal fuse; 111. First plate section; 112. Second plate section; 113. Fuse section; 1131. Neck; 1132. Perforation;

[0064] 12. Conductor component; 121. First section; 122. Structurally weak section; 123. Second section; 13. External conductor;

[0065] 20. Heat sink; 21. First heat sink; 211. Cavity; 22. Second heat sink; 221. Sand filling hole;

[0066] 30. Injection molded part; 31. Clearance groove; 32. Through hole; 40. Breaking device; 50. Gas generator;

[0067] 60. Assembly shell; 61. Assembly cavity; 62. Mounting slot; 70. Arc-extinguishing shell; 71. Arc-extinguishing cavity;

[0068] 80. Cover plate; 90. Circuit board; Z, first direction; X, second direction; Y, third direction. Detailed Implementation

[0069] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0071] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0072] 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.

[0073] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0074] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0075] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0076] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0077] In power systems, fuses are important protective electrical appliances, playing a crucial role in short-circuit protection. Their working principle is that when an overload or short circuit occurs in the circuit, causing a sharp increase in current, the signal element inside the fuse quickly melts, thereby cutting off the circuit and protecting electrical equipment from damage.

[0078] In related technologies, heat sinks are used to effectively dissipate heat from the signal fuse. To achieve electrical isolation between the heat sink and the conductive copper busbar, an insulating film is typically used. However, the insulating film between the heat sink and the conductive copper busbar is prone to failure, leading to external short circuits and severely interfering with the fuse's normal breaking function.

[0079] Based on the above considerations, in order to improve the stability and reliability of the fuse's breaking function, this application designs a fuse, which includes a conductor assembly, an injection molded part, and a heat sink for dissipating heat from the signal fusible element of the conductor assembly. By distributing at least a portion of the injection molded part between the heat sink and the conductor assembly to isolate the heat sink and the conductor assembly, the risk of insulation failure between the heat sink and the conductor assembly can be reduced, the insulation performance between the heat sink and the conductor assembly can be improved, the risk of short circuit faults can be reduced, and the reliability and stability of the fuse's breaking function can be guaranteed.

[0080] This application provides a battery device using the fuse disclosed herein, and an electrical device using the battery device as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.

[0081] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical device 1, battery device 1000, and fuse 100 of this application.

[0082] Please refer to Figure 1 , Figure 1 The electrical device 1 provided in some embodiments of this application is a schematic diagram of a vehicle structure. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 1000, which can be located at the bottom, front, or rear of the vehicle. The battery device 1000 can be used to supply power to the vehicle; for example, the battery device 1000 can serve as the vehicle's operating power source. The vehicle may also include a controller 2000 and a motor 3000. The controller 2000 controls the battery device 1000 to supply power to the motor 3000, for example, to meet the power needs of starting, navigation, and driving the vehicle. In some embodiments of this application, the battery device 1000 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0083] Please refer to Figure 2 , Figure 2The following is an exploded view of the structure of a battery device 1000 provided in some embodiments of this application. The battery device 1000 includes a housing 200 and a plurality of battery cells 300. The housing 200 provides assembly space for the battery cells 300, and the battery cells 300 are housed within the housing 200.

[0084] As an example, the housing 200 may include a first housing 210 and a second housing 220. The first housing 210 and the second housing 220 are fastened together to form a closed space inside the housing 200 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 210 may be a top cover or a bottom plate.

[0085] As an example, the housing 200 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 200 forms an enclosed space to accommodate the battery cell assembly.

[0086] As an example, the housing 200 can be part of the vehicle's chassis structure. For instance, the top cover of the housing 200 can be at least part of the vehicle's floor, or the frame of the housing 200 can be at least part of the vehicle's crossbeams and longitudinal beams.

[0087] The battery device 1000 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells 300, and when there are multiple battery cells 300, they are connected in series, parallel, or mixed connections via a busbar.

[0088] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 300; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 300 together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells 300 together with cable ties.

[0089] In some embodiments, the battery device 1000 may be a battery pack, which includes a housing 200 and one or more battery cell assemblies housed in the housing 200.

[0090] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 200 by fixing the battery module in the housing 200.

[0091] As an example, the battery cell assembly can also be housed in the housing 200 by directly fixing multiple battery cells 300 to the housing 200.

[0092] The battery cell 300 mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell 300 may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. The battery cell 300 is generally divided into three types according to the packaging method: cylindrical battery cell 300, square battery cell 300, and pouch battery cell 300, and the embodiments of this application are not limited to these.

[0093] For example, a battery cell 300 may typically include a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0094] The following is for reference. Figures 3-6 A fuse 100 according to an embodiment of the first aspect of this application is described. Figure 3 This is an exploded view of the fuse 100 according to an embodiment of this application; Figure 4 This is a schematic diagram of the second heat sink 22 of the fuse 100 according to an embodiment of this application; Figure 5 This is a schematic diagram of the conductor 12 of the fuse 100 according to an embodiment of this application; Figure 6 This is a schematic diagram of the signal fuse 11 of the fuse 100 according to an embodiment of this application.

[0095] This application provides an embodiment of a fuse 100, such as Figure 3 As shown, the fuse 100 includes: a conductor assembly 10, a heat sink 20, and an injection molded part 30. The conductor assembly 10 includes a signal fuse 11, a conductor 12, and an external conductor 13. The conductor 12 and the external conductor 13 are connected through the signal fuse 11. The heat sink 20 is disposed on one side of the conductor assembly 10 in the first direction Z and is used to dissipate heat from the signal fuse 11. At least a portion of the injection molded part 30 is disposed between the heat sink 20 and the conductor assembly 10 to separate the heat sink 20 from the conductor assembly 10.

[0096] For example, conductor 12 is along Figure 3 The copper busbar shown extends in the second direction X, and the thickness direction of the copper busbar is along... Figure 3 The first direction is Z, as shown in the diagram. The external conductor 13 is also a copper busbar extending along the second direction X, and the thickness direction of the external conductor 13 is along the first direction Z.

[0097] The signal fuse 11 is an electrical conductor. The signal fuse 11 has a low melting point and a high resistance value. When a short circuit or excessive current occurs in the circuit, the signal fuse 11 will heat up rapidly and melt.

[0098] like Figure 3 As shown, conductor 12 and external conductor 13 are arranged at intervals along the second direction X. Signal fuse 11 is connected between conductor 12 and external conductor 13. When the circuit containing fuse 100 is operating normally, current flows through the series circuit formed by conductor 12, signal fuse 11, and external conductor 13. At this time, signal fuse 11 remains conductive, and the entire fuse 100 is in normal operating mode. When a short circuit or other fault occurs in the circuit, the current through signal fuse 11 increases sharply. Due to its own resistance characteristics, signal fuse 11 heats up rapidly under the action of excessive current. When the temperature reaches the melting point of signal fuse 11, signal fuse 11 melts, thereby disconnecting the circuit and providing overload protection.

[0099] For example, the heat sink 20 can be a heat sink plate, heat sink fin, water-cooled plate, or other structure. For example, the signal fuse 11 is disposed on one side of the conductor 12 and the external conductor 13 in the thickness direction, and the heat sink 20 is disposed on the side of the signal fuse 11 away from the conductor 12 and the external conductor 13 in the thickness direction, so as to facilitate heat dissipation for the signal fuse 11.

[0100] When the fuse 100 is working normally, the heat sink 20 can effectively reduce the operating temperature of the signal fuse 11, reduce the probability of the signal fuse 11 degrading in performance or being accidentally melted due to overheating, extend the service life of the signal fuse 11, improve the stability of the fuse 100 operation, reduce the performance degradation of the components around the signal fuse 11 due to excessive temperature, reduce the risk of insulation failure, and reduce the failure rate.

[0101] The injection molded part 30 is an injection-molded plastic part and also a rigid insulating part. In some examples, the injection molded part 30 may be entirely disposed between the heat sink 20 and the conductor assembly 10, for example, the heat sink 20, the injection molded part 30, and the conductor assembly 10 are arranged sequentially along the first direction Z. In other examples, only a portion of the injection molded part 30 may be disposed between the heat sink 20 and the conductor assembly 10, with another portion of the injection molded part 30 arranged around the conductor assembly 10, and / or on the side of the conductor assembly 10 facing away from the heat sink 20 in the first direction Z.

[0102] In some instances, the heat resistance temperature of the injection molded part 30 is greater than or equal to 280°C. Further, the heat resistance temperature of the injection molded part 30 is greater than or equal to 300°C, and even further, the heat resistance temperature of the injection molded part 30 is greater than or equal to 330°C. For example, the heat resistance temperature of the injection molded part 30 can be 280°C, 285°C, 290°C, 295°C, 300°C, 305°C, 310°C, 315°C, 320°C, 330°C, 340°C, 350°C, 360°C, 380°C, 400°C, 450°C, or 500°C and above.

[0103] In some examples, injection molded part 30 can be a high-temperature nylon glass fiber composite part. For example, injection molded part 30 can be PPA+GF30, which is a polyphthalamide (PPA) reinforced material, where GF30 indicates that it contains 30% glass fiber (GF) reinforcing agent.

[0104] It should be noted that in existing technologies, insulating films are typically used to achieve electrical isolation between the heat sink 20 and the conductive copper busbar. However, the fuse 100 generates heat under both normal and fault conditions, causing its internal temperature to rise. Under sustained high temperatures, the insulating film is highly susceptible to failure. Once the insulating film fails, the current bypasses the original path of the signal fuse 11 and flows through the heat sink 20, resulting in an external short circuit. This not only severely interferes with the normal breaking function of the fuse 100 but also significantly affects its breaking reliability, making it unable to promptly and effectively cut off the fault current at critical moments, posing a significant threat to the stable operation of the electrical device 1.

[0105] Compared to the prior art where an insulating film is provided between the heat sink 20 and the conductor assembly 10, in this embodiment, the heat sink 20 and the conductor assembly 10 are separated by an injection molded part 30. The injection molded part 30 can play an electrical insulating role between the heat sink 20 and the conductor assembly 10. Compared to the insulating film, since the injection molded part 30 is thicker, harder, and has a higher heat resistance temperature, it can significantly reduce the probability of the injection molded part 30 failing due to high temperature between the conductor assembly 10 and the heat sink 20, improve the insulation performance between the heat sink 20 and the conductor assembly 10, reduce the risk of short circuit failure, and ensure the reliability and stability of the fuse 100 disconnection.

[0106] In the above technical solution, by setting the injection molded part 30 and placing at least a portion of the injection molded part 30 between the heat sink 20 and the conductor assembly 10 to separate the heat sink 20 and the conductor assembly 10, the risk of insulation failure between the heat sink 20 and the conductor assembly 10 can be reduced, the insulation performance between the heat sink 20 and the conductor assembly 10 can be improved, the risk of short circuit faults can be reduced, and the reliability and stability of the fuse 100 disconnection can be guaranteed.

[0107] In some embodiments of this application, reference is made to Figure 3 The injection molded part 30 is integrally injection molded with the conductor part 12 and / or the external conductor 13.

[0108] In other words, the injection molded part 30 and the conductor part 12 are integrally injection molded, or the external conductor 13 is integrally injection molded with the injection molded part 30, or both the conductor part 12 and the external conductor 13 are integrally injection molded with the injection molded part 30.

[0109] In the above technical solution, since the injection molded part 30 is integrally injection molded with the conductor 12 and / or the external conductor 13, on the one hand, the number of parts and assembly steps can be reduced, production efficiency can be improved, and labor costs and the probability of assembly errors can be reduced. On the other hand, the injection molded part 30 can provide structural support for the conductor 12 and / or the external conductor 13, improve the structural strength and stability of the conductor 12 and / or the external conductor 13, improve the vibration resistance of the conductor assembly 10, thereby reducing the risk of the signal fuse 11 melting prematurely due to external force, and improving the reliability and stability of the fuse 100.

[0110] In some embodiments of this application, reference is made to Figure 3 At least a portion of the conductor 12 and / or at least a portion of the external conductor 13 are enclosed within the injection molded part 30.

[0111] In some examples, a portion of the conductor 12 is encased within the injection molded part 30 by injection molding, while another portion of the conductor 12 is exposed on the outside of the injection molded part 30, or the entire structure of the conductor 12 is encased within the injection molded part 30.

[0112] In some examples, only a portion of the structure of the external conductor 13 is encased within the injection molded part 30 by injection molding, while another portion of the structure of the external conductor 13 is exposed on the outside of the injection molded part 30, or the entire structure of the conductor 12 is encased within the injection molded part 30.

[0113] In the above technical solution, at least a portion of the conductor 12 and / or the external conductor 13 is encased within the injection molded part 30, which can further improve the insulation performance between the conductor 12 and the external conductor 13 and other components of the fuse 100, improve the stability and reliability of the fuse 100 operation, and further enhance the structural strength of the conductor 12 and / or the external conductor 13 through the injection molded part 30, reducing the risk of the signal fuse 11 melting prematurely due to external force. In addition, it can also reduce the contact area between the conductor 12 and the external conductor 13 and the air or environment, and improve the service life of the conductor 12 and the external conductor 13.

[0114] In some embodiments of this application, reference is made to Figure 3The conductor 12 and the external conductor 13 are arranged along the second direction X, which intersects the first direction Z. In the projection plane perpendicular to the first direction Z, the projections of the opposite ends of the conductor 12 and the external conductor 13 in the second direction X are located outside the projection of the injection molded part 30.

[0115] In other words, in the second direction X, the opposite ends of the conductor 12 and the external conductor 13 both extend to the outside of the injection molded part 30.

[0116] For example, in the second direction X, one end of the conductor 12 facing the external conductor 13 is enclosed within the injection molded part 30, and the other end of the conductor 12 extends beyond one end face of the injection molded part 30. A first fixing hole is formed at the other end of the conductor 12, and the conductor 12 is connected to an external electrical connector of the fuse 100 via a fastener passing through the first fixing hole. Similarly, in the second direction X, one end of the external conductor 13 facing the conductor 12 is enclosed within the injection molded part 30, and the other end of the external conductor 13 extends beyond the other end face of the injection molded part 30. A second fixing hole is formed at the other end of the external conductor 13, and the external conductor 13 is connected to an external electrical connector of the fuse 100 via a fastener passing through the second fixing hole.

[0117] In some examples, the first fixing hole is an elongated hole extending along the second direction X, and the second fixing hole is also an elongated hole extending along the second direction X. This reduces the assembly difficulty between the conductor 12 and the external conductor 13 and the electrical connector, improving assembly efficiency.

[0118] In the above technical solution, by having the opposite ends of the conductor 12 and the external conductor 13 extend out of the injection molded part 30, it is possible to improve the insulation performance between the conductor assembly 10 and the heat sink 20, and facilitate the connection of the conductor 12 and the external conductor 13 to the electrical connector outside the fuse 100, thereby improving assembly efficiency.

[0119] In some embodiments of this application, reference is made to Figure 3 The injection molded part 30 has a relief groove 31 that opens toward the heat sink 20. The signal melt 11 is disposed in the relief groove 31, and the heat sink 20 is supported on the periphery of the relief groove 31.

[0120] In some examples, the clearance groove 31 has a first sidewall and a second sidewall arranged opposite to each other in the second direction X. One end of the conductor 12 extends into the clearance groove 31 through the first sidewall, and one end of the external conductor 13 extends into the clearance groove 31 through the second sidewall. In the third direction Y, the width dimension of the conductor 12 can be greater than, equal to or less than the maximum dimension of the clearance groove 31 in the third direction Y, and the width dimension of the external conductor 13 in the third direction Y can be greater than, equal to or less than the maximum dimension of the clearance groove 31 in the third direction Y. That is, in the width direction of the conductor 12 or the external conductor 13, one end of the conductor 12 can extend partially or completely into the clearance groove 31, and one end of the external conductor 13 can also extend partially or completely into the clearance groove 31.

[0121] The signal melt 11 is connected to the portions of the conductor 12 and the external conductor 13 that extend into the clearance groove 31, respectively. For example, the signal melt 11 can be welded to the conductor 12 and the external conductor 13, respectively.

[0122] In some examples, the clearance slot 31 can be a circular slot, an elliptical slot, or a polygonal slot.

[0123] In the above technical solution, by providing a clearance groove 31 on the injection molded part 30, the signal melt 11 can be easily connected to the conductor 12 and the external conductor 13 injected into the injection molded part 30. At the same time, the clearance groove 31 can directly transfer the heat of the signal melt 11 to the heat sink 20, improve the heat dissipation efficiency of the heat sink 20 for the signal melt 11, and enable the signal melt 11 to work in a suitable temperature range.

[0124] In some embodiments of this application, reference is made to Figure 3 The heat sink 20 defines a cavity 211, which is connected to the relief groove 31. Both the cavity 211 and the relief groove 31 are filled with arc-extinguishing sand.

[0125] For example, the arc-extinguishing sand can be arc-extinguishing quartz sand, which is mainly made from crushed quartz stone. Arc-extinguishing quartz sand has high thermal conductivity, insulation properties, and deionization effect. Specifically, arc-extinguishing quartz sand can promote the recombination of ions in the arc, reduce the number of charged particles in the arc, and extinguish the arc quickly. At the same time, it can quickly remove the heat generated by the arc, which has a strong cooling effect on the arc, causing its temperature to drop rapidly. Furthermore, during the arc extinguishing process, it will not cause accidental electrical conduction between different parts of the electrical equipment, ensuring the stable and reliable operation of the electrical equipment.

[0126] During the normal operation of the fuse 100, the heat generated by the signal fuse 11 is first transferred to the arc-extinguishing sand filled in the relief groove 31. Due to the good thermal conductivity of the arc-extinguishing sand, the heat is quickly conducted between the arc-extinguishing sands and enters the cavity 211 in the heat sink 20 through the connection between the relief groove 31 and the heat sink 20. It is further absorbed by the arc-extinguishing sand in the cavity 211. Subsequently, the heat is dissipated to the surrounding environment with the help of the material properties of the heat sink 20.

[0127] In the above technical solution, by filling the cavity 211 and relief groove 31 of the heat sink 20 with arc-extinguishing sand, the arc-extinguishing sand can quickly transfer the heat of the signal fuse 11 to the heat sink 20, improve the heat dissipation efficiency of the signal fuse 11, effectively reduce the operating temperature of the signal fuse 11, extend its service life, and ensure the stable operation of the signal fuse 11. Furthermore, when a short circuit or other fault occurs in the circuit and the signal fuse 11 melts and generates an arc, the arc-extinguishing sand can quickly absorb the arc energy, suppress the continuous burning and expansion of the arc, play a highly efficient arc-extinguishing role, and greatly improve the reliability of the fuse 100 in breaking the fault current.

[0128] In some embodiments of this application, reference is made to Figure 3 and Figure 4 The heat sink 20 has a sand filling hole 221 on the side away from the relief groove 31, which communicates with the cavity 211. The fuse 100 also includes a sealing element that seals the sand filling hole 221.

[0129] The plugging component can be a plug, which can be interference-fitted or threaded with the sand filling hole 221. The plug can also be welded to the heat sink 20 to seal the sand filling hole 221.

[0130] In the above technical solution, by forming a sand filling hole 221 on the side of the heat sink 20 away from the relief groove 31, the arc extinguishing sand can be conveniently poured into the cavity 211 and the relief groove 31, thereby improving assembly efficiency. By setting a plug, the probability of arc extinguishing sand leakage can be reduced, thereby improving the sealing performance of the heat sink 20.

[0131] In some embodiments of this application, reference is made to Figure 3 and Figure 4 There are multiple sand filling holes 221, which are arranged at intervals, and the sealing element corresponds to each sand filling hole 221.

[0132] For example, the number of sand-filling holes 221 can be two, three, four, five, or more. Multiple sand-filling holes 221 can be arranged along the width direction of the heat sink 20 (e.g., ...). Figure 3 and Figure 4 The second direction X shown) and / or the length direction (as shown) Figure 3 and Figure 4 The third party shown is arranged at intervals (Y).

[0133] In the above technical solution, by setting multiple spaced sand filling holes 221, the arc extinguishing sand can be filled into the cavity 211 of the heat sink 20 more evenly and efficiently, thereby improving the sand filling efficiency and optimizing the heat dissipation and arc extinguishing performance of the heat sink 20.

[0134] In some embodiments of this application, reference is made to Figure 3 and Figure 4 The heat sink 20 includes a first heat sink 21 and a second heat sink 22. The first heat sink 21 defines a cavity 211 that is open on both sides in the first direction Z. One opening of the cavity 211 faces the relief groove 31. The second heat sink 22 covers the other opening of the cavity 211.

[0135] like Figure 3 As shown, the first heat sink 21 and the second heat sink 22 are separate components. The first heat sink 21 is a cylindrical shape extending along the first direction Z, and the outer contour of the cross section of the first heat sink 21 perpendicular to the first direction Z is rectangular. The cross section of the cavity 211 perpendicular to the first direction Z is rectangular. The second heat sink 22 includes a heat sink end plate and a heat sink support plate. The heat sink end plate is a plate set perpendicular to the first direction Z and is located on the side of the first heat sink 21 away from the signal fuse 11, and covers the cavity 211. The heat sink support plate is connected to the side of the heat sink end plate away from the first heat sink 21 and extends along the first direction Z away from the first heat sink 21. There are one or more heat sink support plates. Multiple heat sink support plates can be arranged at intervals along the second direction X and / or the third direction Y, and multiple heat sink support plates can also be connected crosswise.

[0136] The heat dissipation end plate covers the cavity 211, which can improve the sealing performance of the heat dissipation component 20, and the heat dissipation support plate can increase the heat dissipation area of ​​the heat dissipation component 20, further improving the heat dissipation effect of the heat dissipation component 20.

[0137] In the above technical solution, the heat sink 20 includes a first heat sink 21 and a second heat sink 22, which can reduce the processing difficulty and processing cost of the heat sink 20.

[0138] In some embodiments of this application, reference is made to Figure 3 The first heat sink 21 is made of aluminum or ceramic, and / or the second heat sink 22 is made of aluminum or ceramic.

[0139] In the above technical solution, the first heat sink 21 and the second heat sink 22 are made of aluminum or ceramic, which can improve the heat dissipation efficiency of the heat sink 20, improve the heat dissipation effect on the signal fuse 11, and enable the fuse 100 to operate stably and reliably.

[0140] In some embodiments of this application, the heat sink 20 is integrally formed.

[0141] In the above technical solution, the heat sink 20 is integrally formed, which can reduce the number of parts, improve assembly efficiency, improve heat conduction efficiency, and enhance the heat dissipation effect on the signal melt 11.

[0142] In some embodiments of this application, the heat sink 20 is made of aluminum or ceramic.

[0143] In the above technical solution, the heat sink 20 is made of aluminum or ceramic, which can improve the heat dissipation efficiency of the heat sink 20, improve the heat dissipation effect on the signal fuse 11, and enable the fuse 100 to operate stably and reliably.

[0144] In some embodiments of this application, reference is made to Figure 3 The injection molded part 30 has a through hole 32 extending through the injection molded part 30 along the first direction Z. The conductor 12 has a structurally weak section 122, and a structurally weak area is provided on the structurally weak section 122. The structurally weak area is exposed at the position of the through hole 32. The fuse 100 also includes a breaking device 40, which is provided on one side of the conductor assembly 10 in the first direction Z and is configured to be movable along the first direction Z to cut the conductor 12 at the position of the structurally weak area.

[0145] like Figure 3 and combined Figure 5 As shown, the conductor 12 is formed as a copper busbar extending along the second direction X. The conductor 12 is a single piece, and the conductor 12 includes components along its length direction (e.g., ...). Figure 5 The first segment 121, the structurally weak segment 122, and the second segment 123 are sequentially connected in the second direction (X). A structurally weak area is formed on the structurally weak segment 122.

[0146] "Structurally weak zone" refers to a specific area on the structurally weak segment 122, where the structural strength of the specific area is lower than that of other areas of the structurally weak segment 122. Under the action of external forces, the specific area is more likely to fracture than other areas.

[0147] As an example, the local thickness or local cross-sectional area of ​​the structurally weak section 122 can be reduced to form a structurally weak area. Alternatively, a weakening groove or weakening hole can be formed on the structurally weak section 122. The area with the weakening groove or weakening hole is the structurally weak area of ​​the structurally weak section 122. Alternatively, special treatment can be applied to the local area of ​​the structurally weak section 122 to reduce the local hardness and toughness, thereby forming a structurally weak area.

[0148] In some examples, the interrupting device 40 is directly opposite the structurally weak section 122 of the conductor 12 in the first direction Z. When the interrupting device 40 is pushed, it moves along the first direction Z to impact the structurally weak section 122 of the conductor 12, causing the conductor 12 to break at the location of the structurally weak area, thereby disconnecting the circuit.

[0149] In some examples, the projection of the interrupting device 40 lies entirely within the projection range of the through hole 32 in a projection plane perpendicular to the first direction Z. This reduces the probability of interference between the interrupting device 40 and the injection-molded part 30, allowing the interrupting device 40 to move smoothly along the first direction Z.

[0150] In the above technical solution, by forming a through hole 32 on the injection molded part 30 to expose the structural weak area of ​​the conductor 12, it is convenient for the breaking device 40 to directly impact the structural weak area and cut the conductor 12 when it is pushed. As a result, the breaking device 40 can accurately cut the structural weak section 122 at a specific position, improve the reliability and consistency of the cutting, accurately control the circuit opening and closing, and reduce unnecessary damage to other parts of the conductor 12, thereby reducing other faults or damage that may be caused by the cutting process.

[0151] In some embodiments of this application, reference is made to Figure 3 The fuse 100 also includes a gas generator 50, which is configured to push the interrupting device 40 to move along a first direction Z when triggered.

[0152] In some examples, the fuse 100 also includes a circuit board 90 with a trigger circuit on which a gas generator 50 is connected. The trigger circuit is configured to trigger the gas generator 50 so that the gas generator 50 pushes the breaking device 40 to move to cut the conductor 12.

[0153] Among them, the gas generator 50 generates gas through chemical reaction or physical change. For example, the gas generator 50 is filled with a specific chemical agent. When it is triggered by an external signal, the agent undergoes a rapid chemical reaction to generate a large amount of gas. This gas expands rapidly in a short time to form a high-pressure gas environment. The pressure of the gas is used to push the interruption device 40 to cut off the conductor 12, so that the fuse 100 can quickly disconnect under the triggering conditions.

[0154] As an example, the gas generator 50 can be a pyrotechnic gas generator 50 or a propellant-generating gas generator 50. When the gas generator 50 is a pyrotechnic gas generator 50, the trigger circuit is configured to ignite the pyrotechnic agent within the gas generator 50. When the gas generator 50 is a propellant-generating gas generator 50, the trigger circuit is configured to trigger a chemical reaction in the propellant within the gas generator 50. For example, the trigger circuit can trigger the propellant by heating it with an electric current flowing through a heating element, by generating an electric spark, or by controlling the activation of a laser or strong light to irradiate the propellant to trigger it.

[0155] As an example, the number of gas generators 50 in the fuse 100 can be one, two, three, four, five, six, seven, eight, or nine or more.

[0156] When the fuse 100 includes multiple gas generators 50, the multiple gas generators 50 are connected in parallel to the trigger circuit. In other words, after the multiple gas generators 50 are connected in parallel, they are then connected as a whole to the trigger circuit. For example, the gas generator 50 has electrical components for igniting or activating a propellant (pyrotechnic agent or gas-generating agent) to generate gas. For example, the electrical components can be ignition elements (heating elements), high-voltage electrodes, laser generators, or high-intensity light sources. The electrical components of the multiple gas generators 50 for igniting or activating the propellant are first connected in parallel and then connected to the trigger circuit.

[0157] When an external trigger signal is connected to the trigger circuit, the trigger circuit can ignite or excite the gas generator 50 through the electrical components connected to the trigger circuit, thereby achieving the function of quickly cutting off the circuit.

[0158] In related technologies, the fuse 100 is equipped with only one gas generator 50. If the gas generator 50 fails, the fuse 100 cannot cut off the circuit and cannot reliably disconnect the circuit, thus posing a great operational risk to the battery device 1000 and the electrical device 1.

[0159] In this embodiment, since there are multiple gas generators 50 connected in parallel to the trigger circuit of the fuse 100, when an external trigger signal is connected to the trigger circuit, multiple gas generators 50 can be triggered simultaneously. When multiple gas generators 50 are triggered simultaneously, the driving force on the breaking device 40 can be increased, improving the cutting efficiency of the conductor 12 and increasing the response speed of the fuse 100 in cutting off the circuit. If one or some of the multiple gas generators 50 fail, the remaining gas generators 50 can still be triggered to push the breaking device to cut off the conductor 12, thus ensuring that there is always a gas generator 50 in the fuse 100 that can be triggered to push the breaking device to cut off the conductor 12, achieving a reliable circuit breaking.

[0160] It should be emphasized that the probability of multiple gas generators 50 in the fuse 100 of this embodiment failing simultaneously is extremely low. Therefore, the reliability of the fuse 100 in disconnecting the circuit can be significantly improved, and the risk of failing to disconnect the circuit due to the failure of the gas generators 50 can be significantly reduced.

[0161] In the above technical solution, by setting a gas generator 50 to drive the interruption device 40, the structure of the fuse 100 can be simplified and the response speed of the fuse 100 to cut off the circuit can be effectively improved.

[0162] In some embodiments of this application, the signal fuse 11 is configured to generate an arc signal when it melts; the trigger circuit includes a transformer and a rectifier, the primary of the transformer is configured to receive the arc signal, the secondary of the transformer is electrically connected to the heating resistor of the gas generator 50 through the rectifier, and the heating resistors of multiple gas generators 50 are connected in parallel across the rectifier.

[0163] The rectifier is a bridge rectifier, which includes four diodes connected in a bridge structure.

[0164] When the circuit containing the fuse 100 is operating normally, the current flows through the circuit in series between the conductor 12 and the signal fuse 11. At this time, the signal fuse 11 remains in a conducting state, the entire fuse 100 is in normal operating mode, and the gas generator 50 is not activated.

[0165] When a short circuit or other fault occurs in the circuit, the current through the signal fuse 11 increases sharply. Due to its own resistive characteristics, the signal fuse 11 heats up rapidly under the influence of the excessive current. When the temperature reaches the melting point of the signal fuse 11, it melts and breaks, generating an electric arc signal at the moment of melting. Since the electric arc signal has a certain voltage and current, the primary winding of the transformer is configured to receive this electric arc signal. The electric arc signal generates a changing magnetic field in the primary winding of the transformer. According to the principle of electromagnetic induction, a corresponding electromotive force is induced in the secondary winding of the transformer, thereby generating an electrical signal.

[0166] The electrical signal generated by the transformer secondary winding passes through a rectifier, which converts the AC signal into a DC signal, ensuring that the output current direction conforms to the operating requirements of the heating resistor in the gas generator 50. The rectified DC signal is then transmitted to the heating resistor in the gas generator 50. When energized, the heating resistor generates heat, which triggers a chemical reaction in the gas-generating agent or pyrotechnic agent inside the gas generator 50, producing a large amount of gas. This gas rapidly expands within the assembly cavity of the fuse 100 housing, creating a high-pressure environment that activates the tripping device 40. The tripping device 40 acts on the conductor 12, causing it to disconnect, thereby cutting off the entire circuit and providing short-circuit protection.

[0167] In this embodiment, an arc signal is generated by the melting of the signal fuse 11. This signal can be captured by the transformer in a very short time after a short-circuit fault occurs, thereby quickly triggering the gas generator 50 to operate. This ensures that the circuit is cut off in the shortest possible time, improving the response speed of the fuse 100 and effectively protecting downstream equipment from damage caused by excessive current. Simultaneously, by utilizing a triggering circuit composed of a transformer and a rectifier, the arc signal is converted into an electrical signal suitable for the operation of the gas generator 50. The entire triggering process is based on mature electromagnetic induction and rectification principles, unaffected by other interference factors, greatly improving the reliability of the gas generator 50 triggering.

[0168] Furthermore, since the signal fuse 11 is specifically designed to detect short-circuit current and generate an arc signal, it works in conjunction with the gas generator 50 and the trigger circuit, making the detection and disconnection of short-circuit faults by the fuse 100 more accurate, reducing the probability of false triggering, and improving the stability of circuit operation.

[0169] Furthermore, since the heating resistors of multiple gas generators 50 are connected in parallel across the rectifier, the rectified DC current can be simultaneously applied across the multiple heating resistors, causing them to heat up simultaneously and simultaneously stimulating the multiple gas generators 50 to produce gas. This increases the driving force on the interruption device 40, improves the response speed of the fuse 100 to circuit interruption, and significantly reduces the risk of failure to effectively disconnect the circuit due to the failure of the gas generators 50, thereby improving the reliability of the fuse 100 in disconnecting the circuit.

[0170] In some embodiments of this application, the heating resistors of multiple gas generators 50 have the same resistance value. This allows multiple gas generators 50 to be triggered synchronously and jointly drive the interruption device 40 to cut the conductor 12, improving the circuit interruption efficiency. In other examples, at least two gas generators 50 have different resistance values ​​for their heating resistors. This allows multiple gas generators 50 to be triggered sequentially and in stages, achieving gradient control of the ignition of multiple gas generators 50, thereby fulfilling the requirement of gradually pushing the interruption device 40 to cut the conductor 12.

[0171] In some embodiments of this application, the trigger circuit further includes an external interface terminal, wherein the two ends of the heating resistor of the gas generator 50 are adapted to be electrically connected to the control power supply through the external interface terminal.

[0172] When a control signal is received indicating that the fuse 100 needs to cut off the circuit, the control system can control the trigger circuit to be electrically connected to the control power supply through the external interface terminal. At this time, the voltage of the control power supply is applied to both ends of the heating resistor, so that the heating resistor is energized and heated, and ignites or triggers the agent in the gas generator 50. The gas generator 50 generates gas, which pushes the interruption device 40 to cut off the conductor 12, thereby cutting off the circuit.

[0173] When the battery device 1000 or the electrical device 1 is subjected to a collision or other unexpected conditions (such as receiving other external signals), it can send a control signal indicating that the circuit should be cut off to the control system, which will then control the fuse 100 to cut off the circuit.

[0174] For example, a control switch can be connected in series between the external interface and the control power supply. The control system can control whether to power on or off the heating resistor of the gas generator 50 by controlling the on / off state of the control switch.

[0175] For example, the heating resistors of the plurality of gas generators 50 are all adapted to be electrically connected to the control power supply via an external interface terminal. For example, only a portion of the heating resistors of the plurality of gas generators 50 are adapted to be electrically connected to the control power supply via an external interface terminal.

[0176] In the above technical solution, by setting an external interface terminal for connecting to the control power supply, the battery device 1000 or the power device 1 can control whether the external interface terminal is connected to the control power supply to control the active circuit cut-off, thereby achieving effective protection of the circuit and enabling the fuse 100 to respond to the triggering requirements of the external signal and achieve active circuit cut-off.

[0177] In some embodiments of this application, a portion of the multiple heating resistors is a first resistor, and another portion of the heating resistors is a second resistor. A first diode is connected in series between the second resistor and the positive terminal of the external interface. The cathode of the first diode is connected to the positive terminal of the external interface.

[0178] In some examples, the control power supply is a DC power supply, and the positive terminal of the external interface is used to connect to the positive terminal of the control power supply. Thus, when the control power supply is connected to the external interface, because the second resistor is connected in series with the first diode, and the first diode is in a reverse biased state (i.e., reverse cutoff state), almost no current flows through the series-connected second resistor and first diode. Therefore, heating of the second resistor cannot be achieved, nor can the gas generator 50 corresponding to the second resistor be activated.

[0179] Meanwhile, no reverse bias diode is provided between the first resistor and the external interface terminal. Therefore, when the control power supply is in the state of being connected to the external interface terminal, it can heat the first resistor, thereby triggering the gas generator 50 corresponding to the first resistor.

[0180] In the above technical solution, when the circuit is cut off by receiving an external control signal, the first diode can prevent the control power supply from conducting with the second resistor. At this time, the control power supply only conducts with the first resistor to make the first resistor heat up. Thus, only the gas generator 50 with the first resistor can be triggered to push the interruption device 40 to cut off the conductor 12, thereby reducing the loss of the gas generator 50 and reducing the maintenance cost of the fuse 100.

[0181] In some examples, one end of the first resistor is connected to the negative output terminal of the rectifier bridge, and the other end of the first resistor is connected to the positive output terminal of the rectifier bridge through the first diode. The two ends of the second resistor are directly connected to the positive and negative output terminals of the rectifier bridge, respectively.

[0182] In some embodiments of this application, a second diode is connected in series between the first resistor and the positive terminal of the external interface, the anode of the second diode is connected to the positive terminal of the external interface, and the cathode of the first diode is connected between the first resistor and the cathode of the second diode.

[0183] When an external control signal is received and the circuit needs to be cut off, the control power supply is connected to the external interface terminal, the second diode is in the forward conduction state, and the first diode is in the reverse cutoff state. At this time, current flows through the first resistor, but no current flows through the second resistor, so that only the gas generator 50 with the first resistor can be triggered.

[0184] In the above technical solution, since a second diode is connected between the first resistor and the positive terminal of the external interface, when a reverse voltage is applied to the external interface, the second diode will be in a reverse cut-off state, and no current will flow through the first resistor. This can reduce the probability of the gas generator 50 being falsely triggered and improve the reliability of circuit protection.

[0185] In some embodiments of this application, the trigger circuit further includes a transient voltage suppression diode, the two ends of which are connected to the two ends of the rectifier. This not only reduces the probability of circuit components such as the rectifier being damaged by excessive voltage, but also effectively suppresses voltage spikes, reduces the interference of voltage fluctuations on the circuit, improves the operational stability of the trigger circuit and the entire system, and enhances the reliability and service life of the fuse 100, the battery device 1000, and the power-consuming device 1.

[0186] In some embodiments of this application, such as Figure 6 As shown, the signal melt 11 is sheet-shaped and includes: a first plate portion 111, a second plate portion 112, and a fuse portion 113. The first plate portion 111 and the second plate portion 112 are along the width direction of the signal melt 11 (e.g., Figure 6The second direction (X) shown is arranged at intervals and respectively connects the conductor 12 and the external conductor 13. The fuse portion 113 is connected between the first plate portion 111 and the second plate portion 112. The fuse portion 113 includes a section along the length direction of the signal fuse 11 (e.g., along the length direction of the signal fuse 11). Figure 6 The plurality of necks 1131 shown are arranged at intervals in the third direction (Y), and the adjacent necks 1131 define a distance along the thickness direction of the signal melt 11 (e.g., Figure 6 The first direction Z) shown in the diagram is through the perforation 1132 of the melt 11.

[0187] "The signal fuse 11 is sheet-shaped" means that the signal fuse 11 has a flat, thin sheet-like structure. The sheet-shaped signal fuse 11 increases its heat dissipation area, making its temperature more stable during normal operation. Simultaneously, the sheet-shaped signal fuse 11 allows for precise control of its fusing characteristics; when an abnormal current occurs, it can quickly melt and break, effectively fulfilling its signal indication function and providing timely feedback on circuit faults.

[0188] The fuse element 113 includes multiple necks 1131. Specifically, the number of necks 1131 in the fuse element 113 can be two, three, four, five, six, eight, ten, fifteen, or more. When the current is abnormal, the necks 1131 will heat up rapidly, increasing the fusing speed, quickly cutting off the circuit, and protecting the equipment.

[0189] The perforation 1132 defined between adjacent narrow necks 1131 can increase the heat dissipation area of ​​the fuse part 113 or the signal fuse 11, which helps to effectively dissipate the heat generated by the signal fuse 11 when the signal fuse 11 is working normally, reduce the probability of the signal fuse 11 being accidentally melted due to overheating, and improve the stability of the signal fuse 11.

[0190] In some examples, both the first plate portion 111 and the second plate portion 112 are flat and arranged in the second direction X. The first plate portion 111 is connected to the conductor 12, and the second plate portion 112 is connected to the external conductor 13. For example, the first plate portion 111 is attached to one side surface of the conductor 12 in the thickness direction, and the second plate portion 112 is attached to one side surface of the external conductor 13 in the thickness direction. Alternatively, the first plate portion 111 is welded to the conductor 12, and the second plate portion 112 is welded to the external conductor 13.

[0191] In the above technical solution, since the fuse portion 113 of the signal fuse 11 includes a plurality of spaced necks 1131 and a through hole 1132 is defined between adjacent necks 1131, when the current is overloaded, the neck 1131 of the signal fuse 11 will heat up rapidly, causing the neck 1131 to melt first, thereby improving the accuracy and reliability of the fuse. The through hole 1132 can increase the heat dissipation area of ​​the fuse portion 113, improve the heat dissipation efficiency of the fuse portion 113 during normal operation, reduce the probability of false melting due to overheating, and improve the stability of the signal fuse 11.

[0192] In some embodiments of this application, such as Figure 6 As shown, in the direction from the first plate portion 111 toward the second plate portion 112, the cross-sectional area of ​​the narrow neck 1131 first gradually decreases and then gradually increases.

[0193] like Figure 6 As shown, the cross-sectional area of ​​the neck 1131 is smallest at the middle in the second direction X, and gradually increases from the middle to both ends of the neck 1131. Since the resistance value is inversely proportional to the cross-sectional area, the resistance value of the neck 1131 is the largest at the middle position, and the heat generation is the largest. When an overload current passes through the neck 1131, the middle position of the neck 1131 can reach the melting temperature first. Therefore, by controlling the cross-sectional area of ​​the middle part of the neck 1131, the precise melting of the neck 1131 can be achieved, the melting time can be reduced, and the protection effect of the circuit can be improved.

[0194] In addition, as the cross-sectional area of ​​the two ends of the narrow neck 1131 gradually increases, when the signal fuse 11 is working normally, the heat in the middle of the narrow neck 1131 can be quickly transferred to the first plate 111 and the second plate 112 through the two ends of the narrow neck 1131, reducing the probability of the narrow neck 1131 melting due to local overheating and improving the reliability of the signal fuse 11.

[0195] In the above technical solution, by gradually reducing and then gradually increasing the cross-sectional area of ​​the neck 1131, when an overload current passes through the neck 1131, the middle position of the neck 1131 can reach the melting temperature first, thereby reducing the melting time and achieving precise melting of the neck 1131. During normal operation, the two ends of the neck 1131 quickly transfer the heat from the middle position, reducing the probability of the neck 1131 accidentally melting due to overheating and improving the reliability of the signal fuse 11.

[0196] In some embodiments of this application, such as Figure 6 As shown, in the direction from the first plate portion 111 toward the second plate portion 112, the fuse portion 113 extends along an arc protruding on one side toward the thickness direction of the signal melt 11.

[0197] In the above technical solution, since the fuse portion 113 extends along an arc protruding to one side, it can not only improve the structural strength of the fuse portion 113, but also better disperse the stress when the signal fuse 11 is subjected to external impact or thermal stress change, reducing the risk of the fuse portion 113 breaking due to stress concentration. It can also increase the surface area of ​​the fuse portion 113, increase the heat dissipation area of ​​the fuse portion 113 during normal operation, make the temperature distribution of the signal fuse 11 more uniform, reduce the possibility of local overheating, thereby reducing the probability of false melting and improving the reliability of the signal fuse 11.

[0198] In some embodiments of this application, reference is made to Figure 3 The fuse 100 further includes: an assembly housing 60, which is connected to the injection molded part 30 and is located on one side of the injection molded part 30 in the first direction Z, and defines an assembly cavity 61, and the breaking device 40 is located in the assembly cavity 61.

[0199] like Figure 3 As shown, the circuit board 90, gas generator 50 and breaking device 40 are all located in the assembly cavity 61, and the circuit board 90, gas generator 50 and breaking device 40 are arranged along the first direction Z. The circuit board 90 is located on the side of the gas generator 50 away from the injection molded part 30 in the first direction Z, and the breaking device 40 is located on the side of the gas generator 50 facing the injection molded part 30 in the first direction Z.

[0200] In the above technical solution, by setting an assembly shell 60 that defines the assembly cavity 61, the assembly shell 60 can provide a space for accommodating and assembling the components of the fuse 100. The compact structure can also isolate the components of the fuse 100 from the external environment and improve the service life of the components.

[0201] In some embodiments of this application, reference is made to Figure 3 The assembly shell 60 defines a mounting groove 62 that is spaced apart from the assembly cavity 61. The mounting groove 62 extends through the assembly shell 60 along the first direction Z, and the heat sink 20 is disposed in the mounting groove 62.

[0202] like Figure 3 As shown, the mounting groove 62 and the assembly cavity 61 are arranged in the second direction X, which intersects with the first direction Z. The opening of the mounting groove 62 is set away from the assembly cavity 61.

[0203] In the above technical solution, by placing the heat sink 20 in the mounting groove 62 of the assembly shell 60, it is not only convenient to fix the heat sink 20 and compact the structure of the fuse 100, but also to isolate the heat sink 20 from the components in the assembly cavity 61, reducing the impact of the heat sink 20 on the components in the assembly cavity 61. In addition, it is convenient to dissipate the heat of the heat sink 20 to the external environment, thereby improving the heat dissipation efficiency of the heat sink 20.

[0204] In some embodiments of this application, reference is made to Figure 3 The heat sink 20 and the assembly shell 60 are integrally injection molded.

[0205] In the above technical solution, the heat sink 20 and the assembly shell 60 are integrally injection molded, which can improve the connection strength between the heat sink 20 and the assembly shell 60, reduce the number of parts of the fuse 100, and improve assembly efficiency.

[0206] In some embodiments of this application, reference is made to Figure 3 The fuse 100 further includes an arc-extinguishing shell 70, which is connected to the injection molded part 30 and is located on the side of the injection molded part 30 away from the assembly shell 60 in the first direction Z, and defines an arc-extinguishing cavity 71. The arc-extinguishing cavity 71 is connected to the through hole 32, and the interrupting device 40 is adapted to move to the arc-extinguishing cavity 71 through the through hole 32.

[0207] In some examples, such as Figure 3 As shown, the arc-extinguishing shell 70 is a box structure with one side open in the first direction Z. The injection molded part 30 covers the open side of the arc-extinguishing shell 70 and cooperates with the arc-extinguishing shell 70 to define the arc-extinguishing cavity 71. The arc-extinguishing cavity 71 is provided with an arc-extinguishing material or arc-extinguishing structure for arc extinguishing.

[0208] When the fuse 100 is in operation, when the signal fusible element 11 is melted, the gas generator 50 is rapidly triggered, generating high-pressure gas to push the interrupting device 40 to move along the first direction Z. The interrupting device 40 quickly enters the arc-extinguishing chamber 71 defined by the arc-extinguishing shell 70 through the through hole 32 on the injection-molded part 30, cutting off the conductor 12 and breaking the circuit. At this time, the arc generated by the short circuit or overload is confined within the arc-extinguishing chamber 71. The special structure and environment within the arc-extinguishing chamber 71, combined with auxiliary materials such as arc-extinguishing sand, can quickly absorb arc energy, suppress arc propagation, and achieve efficient arc extinguishing.

[0209] In the above technical solution, the arc extinguishing shell 70 and the through hole 32 on the injection molded part 30 cooperate with each other to accurately guide the action of the interruption device 40, ensure efficient connection between the circuit cutting and the arc extinguishing process, shorten the fault response time, and the independent arc extinguishing cavity 71 can effectively isolate the arc and improve the reliability of the fuse 100.

[0210] In some embodiments of this application, reference is made to Figure 3 The assembly shell 60, injection molded part 30 and arc extinguishing shell 70 are detachably connected.

[0211] In some examples, the mounting housing 60 is detachably connected to the injection molded part 30, for example, by snap-fitting or fastening. In some examples, the arc-extinguishing housing 70 is detachably connected to the injection molded part 30, for example, by snap-fitting or fastening.

[0212] In the above technical solution, the assembly shell 60, injection molded part 30 and arc extinguishing shell 70 are detachably connected, which can facilitate the assembly, disassembly and maintenance of the fuse 100 and improve the efficiency of assembly, disassembly and maintenance. The separate assembly shell 60, injection molded part 30 and arc extinguishing shell 70 can also reduce the production difficulty of the fuse 100 and improve production efficiency.

[0213] In some embodiments of this application, reference is made to Figure 3 The fuse 100 also includes a cover plate 80, the assembly housing 60 is open on the side opposite to the injection molded part 30 in the first direction Z, and the cover plate 80 covers the open side of the assembly housing 60.

[0214] like Figure 3 As shown, the assembly shell 60 defines an assembly cavity 61 that is open on both sides in the first direction Z. The injection molded part 30 covers one open side of the assembly cavity 61, and the cover plate 80 covers the other open side of the assembly cavity 61.

[0215] In some examples, the cover plate 80 has a plurality of first fastening holes spaced apart circumferentially along its circumference; the assembly housing 60 has a plurality of second fastening holes spaced apart circumferentially along its ... Figure 3 As shown, multiple first fastening holes, multiple second fastening holes, multiple third fastening holes, and multiple fourth fasteners are correspondingly provided on both sides of the third direction Y. The fasteners pass through the first fastening holes, second fastening holes, third fastening holes, and fourth fastening holes in sequence to securely connect the cover plate 80, the assembly shell 60, the injection molded part 30, and the arc extinguishing shell 70.

[0216] In the above technical solution, by setting the cover plate 80, it is possible to easily block dust, water vapor and other impurities from entering the assembly cavity 61, reduce the probability of key components such as the circuit board 90 and gas generator 50 in the assembly cavity 61 being degraded due to corrosion, reduce the occurrence of short circuits and other faults, and improve the operational stability of the fuse 100.

[0217] Secondly, embodiments of this application also provide a battery device 1000, including the fuse 100 of any of the above embodiments.

[0218] The battery device 1000 may include a housing 200, a battery cell assembly, and a fuse 100. The battery cell assembly and the fuse 100 are both located inside the housing 200. The battery cell assembly includes a plurality of battery cells 300 arranged in a stacked manner.

[0219] As an example, fuse 100 may be connected in series on the connecting wire between two connected battery cells 300 in a battery cell assembly, or in series on the connecting wire between two adjacent battery cell assemblies. As an example, fuse 100 may be connected in series on the positive and negative output lines of the battery cell assembly to protect downstream circuits and equipment when the battery cell assembly supplies power to an external circuit. As an example, fuse 100 may be installed on the connecting wire between the battery management system and the battery cell assembly, or fuse 100 may be installed on the power input line of the battery management system to protect the battery management system.

[0220] In the above technical solution, since the battery device 1000 is equipped with the aforementioned fuse 100, the fuse 100 includes an injection molded part 30, and at least a portion of the injection molded part 30 is disposed between the heat sink 20 and the conductor assembly 10 to separate the heat sink 20 and the conductor assembly 10, the risk of insulation failure between the heat sink 20 and the conductor assembly 10 can be reduced, the insulation performance between the heat sink 20 and the conductor assembly 10 can be improved, the risk of short circuit failure can be reduced, the reliability and stability of the fuse 100 disconnection can be ensured, and the overall performance of the battery device 1000 can be improved.

[0221] Thirdly, embodiments of this application also provide an electrical device 1, including the battery device 1000 of any of the above embodiments. The battery device 1000 is used to store or provide electrical energy.

[0222] In the above technical solution, the overall performance of the power-consuming device 1 is improved by incorporating the battery device 1000.

[0223] Fourthly, embodiments of this application also provide an energy storage device, including the battery device 1000 of any of the above embodiments.

[0224] In the above technical solution, the overall performance of the energy storage device is improved by incorporating the aforementioned battery device 1000.

[0225] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices 1000, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0226] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0227] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0228] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0229] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0230] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1000 via pipelines for regulating the temperature of the individual battery cells 300.

[0231] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes a slave battery management unit (SBMU), a fusion switch, and other modules.

[0232] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0233] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage devices.

[0234] As an example, a power distribution module can be used to distribute power to the power consumption modules of an energy storage device.

[0235] The following will refer to Figures 2-6This application describes a battery device 1000 according to a specific embodiment.

[0236] Reference Figure 2 The battery device 1000 includes a housing 200, a plurality of battery cells 300, and fuses 100. The housing 200 includes a first housing 210 and a second housing 220 that are fastened together along a first direction Z, defining a receiving cavity. The plurality of battery cells 300 are stacked and arranged along the length and width directions of the housing 200, and are connected in series and parallel to each other. There are multiple fuses 100, all housed within the housing 200. A portion of the fuses 100 are electrically connected to the battery cell assembly, and another portion is electrically connected to the battery management system.

[0237] Specifically, such as Figure 3 As shown, the fuse 100 includes: a cover plate 80, a circuit board 90, two gas generators 50, a breaking device 40, an assembly shell 60, an injection molded part 30, a signal fuse 11, a conductor 12, an external conductor 13, an arc-extinguishing shell 70, and a heat sink 20. The cover plate 80, assembly shell 60, injection molded part 30, and arc-extinguishing shell 70 are arranged along the third direction Y and connected by fasteners. The cover plate 80, assembly shell 60, and injection molded part 30 cooperate to define an assembly cavity 61, and the injection molded part 30 and arc-extinguishing shell 70 cooperate to define an arc-extinguishing cavity 71. The assembly cavity 61 and the arc-extinguishing cavity 71 are spaced apart along the third direction Y.

[0238] The assembly shell 60 defines a mounting groove 62, which is located on one side of the assembly cavity 61 in the second direction X. The heat sink 20 is disposed in the mounting groove 62, and the heat sink 20 and the assembly shell 60 are integrally injection molded.

[0239] The circuit board 90, the two gas generators 50 and the interruption device 40 are all located in the assembly cavity 61. The two gas generators 50 are arranged between the circuit board 90 and the interruption device 40. Both gas generators 50 have heating resistors, which are the first resistor and the second resistor, respectively.

[0240] The conductor 12 and the external conductor 13 are arranged at intervals along the second direction X, and are both integrally connected to the injection molded part 30 by injection molding. The injection molded part 30 has clearance grooves 31 and through holes 32 spaced apart along the second direction X. The through holes 32 penetrate the injection molded part 30 along the first direction Z. The clearance grooves 31 are formed on the side of the injection molded part 30 facing the assembly housing 60. The signal melt 11 is disposed within the clearance grooves 31 and is electrically connected to the conductor 12 and the external conductor 13. The structurally weak area of ​​the conductor 12 is exposed through the through holes 32, so that it is arranged directly opposite the interruption device 40 in the first direction Z.

[0241] The heat sink 20 is made of aluminum or ceramic. The heat sink 20 is supported on the periphery of the relief groove 31. A cavity 211 is formed inside the heat sink 20. The cavity 211 and the relief groove 31 are filled with arc-extinguishing sand. A sand filling hole 221 is formed on the side of the heat sink 20 away from the relief groove 31 in the first direction Z. A sealing element is provided in the sand filling hole 221.

[0242] The circuit board 90 has a trigger circuit, and both the first resistor and the second resistor are connected to the trigger circuit. Specifically, the trigger circuit includes: a transformer, a rectifier, a first diode, a second diode, a transient voltage suppression diode, and an external interface terminal. The primary side of the transformer is adapted to receive the arc signal generated when the signal fuse 11 melts. The rectifier is connected to the secondary side of the transformer. The two ends of the transient voltage suppression diode, the two ends of the first resistor, and the two ends of the second resistor are respectively connected to the positive and negative output terminals of the rectifier. The positive and negative terminals of the external interface terminal are respectively connected to the two ends of the first resistor. The second diode is connected in series between the positive terminal of the external interface terminal and the first resistor. The anode of the first diode is connected to one end of the second resistor, and the cathode of the first diode is connected between the cathode of the second diode and the first resistor.

[0243] The following describes the triggering process of the fuse 100 in this embodiment during a short circuit and the triggering process triggered by an external signal.

[0244] Short-circuit current triggering: When a short circuit or other fault occurs in a circuit of the battery device 1000 connected in series with the fuse 100, the current through the signal fuse 11 increases sharply. Under the action of the excessive current, the signal fuse 11 heats up rapidly. When the temperature reaches the melting point of the signal fuse 11, it melts and breaks. At the moment of melting, an arc signal is generated and received by the primary winding of the transformer. The electrical signal generated by the secondary winding of the transformer passes through a rectifier, which converts the AC signal into a DC signal, ensuring that the direction of the output current conforms to the operating requirements of the heating resistor of the gas generator 50. The rectified DC signal is then transmitted to the first resistor and the second resistor. The first and second resistors generate heat when energized. The heat triggers a chemical reaction in the gas-generating agent or pyrotechnic agent inside the gas generator 50, producing a large amount of gas. This gas rapidly expands in the assembly cavity inside the fuse 100 housing, creating a high-pressure environment that drives the interruption device 40 to operate. The interruption device 40 acts on the conductor 12, causing the conductor 12 to disconnect, thereby cutting off the entire circuit and achieving short-circuit protection for the circuit.

[0245] External signal triggering: When the battery device 1000 is impacted or receives a trigger signal from the power device 1, the control system can control the external interface terminal to be connected to the control power supply. Since the first diode has the function of preventing current reversal, the current connected to the control power supply will only pass through the second diode and the first resistor, and will not pass through the first diode and the second resistor. In this way, only the first resistor heats up, and the heat ignites the gas generator 50 with the first resistor, which pushes the interruption device 40 to act. The interruption device 40 acts on the conductor 12, causing the conductor 12 to break, thereby cutting off the entire circuit and realizing the control and protection of the circuit.

[0246] In the battery device 1000 of the above embodiment, the heat sink 20 of the fuse 100 can inject arc-extinguishing sand into the cavity 211 through the sand filling hole 221, and then seal the sand filling hole 221 through the sealing member to meet the sealing requirements of the cavity 211. During the normal operation of the fuse 100, the arc-extinguishing sand can effectively dissipate heat for the signal fuse 11, so that the signal fuse 11 can carry a larger current. At the same time, the arc-extinguishing sand can quickly and evenly transfer heat to the heat sink 20, so that the heat sink 20 can transfer heat to the external environment, thereby improving the heat dissipation efficiency. The injection molded part 30 is made of high-temperature nylon PPA+GF30 material with a heat resistance temperature of greater than or equal to 330°C. The conductor 12 and the external conductor 13 are integrally injection molded with the injection molded part 30, which can improve the overall vibration resistance of the fuse 100 and prevent the signal fuse 11 from melting prematurely due to external forces or other factors.

[0247] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fuse, characterized in that, include: A conductor assembly (10) includes a signal fuse (11), a conductor element (12), and an external conductor (13), wherein the conductor element (12) and the external conductor (13) are connected through the signal fuse (11); Heat sink (20) is provided on one side of the conductor assembly (10) in the first direction (Z) for dissipating heat from the signal fuse (11); An injection molded part (30), at least a portion of which is disposed between the heat sink (20) and the conductor assembly (10) to separate the heat sink (20) from the conductor assembly (10).

2. The fuse according to claim 1, characterized in that, The injection molded part (30) is integrally injection molded with the conductor (12) and / or the external conductor (13).

3. The fuse according to claim 2, characterized in that, At least a portion of the conductor (12) and / or at least a portion of the external conductor (13) are enclosed within the injection molded part (30).

4. The fuse according to claim 3, characterized in that, The conductor (12) and the external conductor (13) are arranged along the second direction (X), which intersects the first direction (Z). In the projection plane perpendicular to the first direction (Z), the projections of the opposite ends of the conductor (12) and the external conductor (13) in the second direction (X) are located outside the projection of the injection molded part (30).

5. The fuse according to claim 1, characterized in that, The injection molded part (30) has a relief groove (31) that opens toward the heat sink (20), the signal melt (11) is disposed in the relief groove (31), and the heat sink (20) is supported on the periphery of the relief groove (31).

6. The fuse according to claim 5, characterized in that, The heat sink (20) defines a cavity (211), which is connected to the relief groove (31). Both the cavity (211) and the relief groove (31) are filled with arc-extinguishing sand.

7. The fuse according to claim 6, characterized in that, The heat sink (20) has a sand filling hole (221) on the side away from the relief groove (31) that communicates with the cavity (211). The fuse (100) also includes a sealing member that seals the sand filling hole (221).

8. The fuse according to claim 7, characterized in that, The number of sand filling holes (221) is multiple, and the multiple sand filling holes (221) are arranged at intervals. The sealing element corresponds one-to-one with the sand filling hole (221).

9. The fuse according to claim 6, characterized in that, The heat sink (20) includes a first heat sink (21) and a second heat sink (22), wherein the first heat sink (21) defines a cavity (211) that is open on both sides in the first direction (Z), one opening of the cavity (211) faces the relief groove (31), and the second heat sink (22) covers the other opening of the cavity (211).

10. The fuse according to claim 9, characterized in that, The first heat sink (21) is made of aluminum or ceramic, and / or the second heat sink (22) is made of aluminum or ceramic.

11. The fuse according to claim 1, characterized in that, The heat sink (20) is integrally formed.

12. The fuse according to claim 1, characterized in that, The heat sink (20) is made of aluminum or ceramic.

13. The fuse according to any one of claims 1-12, characterized in that, The injection molded part (30) has a through hole (32) extending through the injection molded part (30) along the first direction (Z). The conductor (12) has a structurally weak section (122), and a structurally weak area is provided on the structurally weak section (122). The structurally weak area is exposed at the location of the through hole (32). The fuse (100) further includes a breaking device (40) disposed on one side of the conductor assembly (10) in the first direction (Z) and configured to be movable along the first direction (Z) for cutting the conductor (12) at the location of the structural weak area.

14. The fuse according to claim 13, characterized in that, The fuse (100) also includes: A gas generator (50) is configured to push the interruption device (40) to move along the first direction (Z) when triggered.

15. The fuse according to claim 13, characterized in that, The fuse (100) also includes: Assembly shell (60) is connected to the injection molded part (30) and is disposed on one side of the injection molded part (30) in the first direction (Z), and defines an assembly cavity (61), wherein the breaking device (40) is disposed in the assembly cavity (61).

16. The fuse according to claim 15, characterized in that, The assembly shell (60) defines a mounting groove (62) spaced apart from the assembly cavity (61), the mounting groove (62) penetrates the assembly shell (60) along the first direction (Z), and the heat sink (20) is disposed in the mounting groove (62).

17. The fuse according to claim 15, characterized in that, The heat sink (20) and the assembly shell (60) are integrally injection molded.

18. The fuse according to claim 15, characterized in that, The fuse (100) further includes an arc-extinguishing shell (70), which is connected to the injection molded part (30) and is disposed on the side of the injection molded part (30) away from the assembly shell (60) in the first direction (Z), and defines an arc-extinguishing cavity (71), which communicates with the through hole (32), and the interrupting device (40) is adapted to move to the arc-extinguishing cavity (71) through the through hole (32).

19. The fuse according to claim 18, characterized in that, The assembly shell (60), the injection molded part (30), and the arc-extinguishing shell (70) are detachably connected.

20. The fuse according to claim 15, characterized in that, The fuse (100) further includes a cover plate (80), the assembly housing (60) being open on the side opposite to the injection molded part (30) in a first direction (Z), and the cover plate (80) covering the open side of the assembly housing (60).

21. A battery device, characterized in that, include: The enclosure (200), the battery cell (300) assembly, and the fuse (100) according to any one of claims 1-20 are provided inside the enclosure (200), and the fuse (100) is electrically connected to the battery cell (300) assembly.

22. An electrical appliance, characterized in that, Includes the battery device (1000) as described in claim 21.

23. An energy storage device, characterized in that, Includes the battery device (1000) as described in claim 21.

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