Power-off device, battery and electric device

Abstract

A power-off device (3), a battery (100) and an electric device. The power-off device (3) comprises: an insulating base (31) on which at least two conductive pieces are provided; and a circuit breaker piece (32) which is detachably arranged on the insulating base (31), wherein the circuit breaker piece (32) and the at least two conductive pieces (33) are connected in series and are in an electrical connection so that an assembly formed by means of the circuit breaker piece (32) and the at least two conductive pieces (33) can transmit electrical energy, and the circuit breaker piece (32) is configured to be capable of cutting off the electrical connection when a preset condition is satisfied.

Description

Disconnect devices, batteries and power-consuming devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202310898161.6 and application date of July 20, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a power-off device, a battery, and an electrical device. Background Art

[0004] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and crucial role. A battery consists of a housing and multiple cells housed within it. As a core component of new energy vehicles, batteries are subject to high safety and longevity requirements. However, due to the presence of high-voltage circuits and the lack of a high-voltage power-off protection mechanism, battery reliability is relatively poor, impacting both performance and service life. This poses significant safety risks during use, compromising consumer safety.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a power-off device, a battery, and a power-consuming device, which can effectively improve the problem of poor safety and reliability of the battery due to the presence of a high-voltage circuit.

[0007] In a first aspect, an embodiment of the present application provides a power-off device, comprising: an insulating base, on which at least two conductive parts are provided; a disconnecting part, which is detachably provided on the insulating base, and is connected in series and electrically connected to the at least two conductive parts, so that the assembly formed by the disconnecting part and the at least two conductive parts can transmit electrical energy, and the disconnecting part is constructed to be able to disconnect the electrical connection when a preset condition is met.

[0008] In the above technical solution, the disconnecting device integrates the functions of maintenance power-off and short-circuit power-off protection. The disconnecting component can not only play the role of short-circuit power-off protection, but also, when performing maintenance power-off, it only needs to be removed from the insulating base to cooperate with the insulating base to play the role of maintenance power-off, which is beneficial to improving the reliability of the battery. At the same time, due to the high degree of integration of the disconnecting device, the number of parts can be reduced, which is beneficial to optimizing the overall size of the device, reducing the volume of the disconnecting device, and thereby reducing the installation space required for the disconnecting device, which is beneficial to the installation of other components on the battery.

[0009] In some embodiments of the present application, the preset condition is that the transmitted current reaches a set value or receives an external control instruction. In this technical solution, the preset condition can be understood as an accident situation such as a battery short circuit or a collision. At this time, the current on the assembly formed by the circuit-breaking component and at least two conductive parts will change. When the current reaches the set value, the circuit-breaking component disconnects the electrical connection. Alternatively, the preset condition is an external control instruction. When other equipment such as external detection equipment determines that the situation is more dangerous, it can directly issue a control instruction to the circuit-breaking component. After the circuit-breaking component receives the control instruction, it cuts off the circuit path inside the circuit-breaking component, thereby disconnecting the electrical connection. By disconnecting the circuit, the occurrence or expansion of danger can be suppressed or prevented, ensuring the safety of the equipment.

[0010] In some embodiments of the present application, a first accommodating portion is provided on the insulating base, the first accommodating portion has an opening, and the disconnectable component is at least partially provided in the first accommodating portion.

[0011] In the above technical solution, the first accommodating portion can accommodate the circuit-breaking component and limit the circuit-breaking component, thereby improving the installation reliability and stability between the circuit-breaking component and the insulating base. The circuit-breaking component is detachably connected to the insulating base and then limited by the first accommodating portion, which can effectively fix the circuit-breaking component and reduce the probability of the circuit-breaking component being detached from the insulating base, which is beneficial to improving the reliability of the disconnecting device when the power is on.

[0012] In some embodiments of the present application, the insulating base has a setting surface, the opening is provided on the setting surface, and a ring-shaped convex portion is provided on the setting surface and surrounds the circumferential edge of the opening.

[0013] In the above technical solution, the protrusion forms an annular structure around the circumferential edge of the opening. On the one hand, it can play a guiding role in the installation process of the circuit-breaking component, reducing the difficulty of installing the circuit-breaking component. On the other hand, it can protect the circuit-breaking component. When the disconnecting device and the battery are assembled, the annular protrusion can reduce the probability of other components on the battery colliding with the circuit-breaking component on the side of the set surface, reduce the damage to the circuit-breaking component, improve the safety of the circuit-breaking component, and help to extend the service life of the disconnecting device and improve the reliability of the disconnecting device.

[0014] In some embodiments of the present application, in the protruding direction of the protrusion, at least a portion of the circuit breaker is located in the annular space formed by the protrusion.

[0015] In the above technical solution, at least part of the circuit-breaking component is located in the annular space formed by the protrusion, so that the nesting depth of the circuit-breaking component and the first accommodating portion is reduced while meeting the installation stability and reliability, and the size of the insulating base in the protruding direction of the protrusion is reduced, and the volume of the cutting device is further reduced, thereby saving the installation space required for the cutting device and providing more ample installation space for other components of the battery.

[0016] In some embodiments of the present application, the power-off device further includes a cover plate, a setting space is formed between the cover plate and the setting surface, the setting space is used to install the fixing plate, a second accommodating portion is provided on the side of the cover plate close to the setting surface, and the protruding portion is located in the second accommodating portion.

[0017] In the above technical solution, the cover plate can cover the circuit breaker, reducing the chance of dust or water stains falling on the circuit breaker, thereby reducing the impact of dust or water stains on the circuit breaker, and thus reducing the probability of failure of the circuit breaker. Because the setting surface is provided with a protrusion, the second receiving portion of the cover plate can avoid the protrusion, reducing the impact of the protrusion on the installation of the cover plate.

[0018] In some embodiments of the present application, the circuit breaker has an outer end close to the opening, and a lifting portion is provided on the outer end.

[0019] In this technical solution, when the circuit breaker needs to be disassembled, the pulling part can cooperate with the tool to remove the circuit breaker from the first accommodating part, thereby reducing the difficulty of disassembling the circuit breaker. When the battery needs to be repaired or the power-off device needs to be installed on a large battery, the pulling part can improve the efficiency of disassembling the circuit breaker and improve the efficiency of battery repair or installation.

[0020] In some embodiments of the present application, the lifting portion is a handle, and in the protruding direction of the protrusion, the height of the handle relative to the set surface is greater than or equal to the height of the protrusion.

[0021] In the above technical solution, it can be understood that the handle can extend out of the annular space formed by the convex portion on the set surface, and there are relatively few obstacles in the space around the handle. The operator or external tools can more easily act on the handle, making it convenient to remove the circuit breaker from the first accommodating portion.

[0022] In some embodiments of the present application, the insulating base has a setting surface, on which the circuit breaker is mounted. The power disconnect device further includes a cover plate, with a setting space formed between the cover plate and the setting surface. The setting space is used to mount a fixing plate. A second accommodating portion is provided on a side of the cover plate proximate the setting surface, and at least a portion of the circuit breaker is located within the second accommodating portion. In this technical solution, the cover plate can accommodate the circuit breaker, reducing the chance of dust or water stains falling on the circuit breaker, thereby reducing the impact of dust or water stains on the circuit breaker, and thus reducing the probability of failure of the circuit breaker.

[0023] In some embodiments of the present application, the disconnect device further includes a sealing ring, which is located on the side of the cover plate near the set surface. In this technical solution, the sealing ring can provide a seal between the cover plate and the fixed plate, improving the dust and water resistance of the disconnect component, further reducing the impact of dust and water stains on the disconnect component, and reducing the probability of failure of the disconnect component.

[0024] In some embodiments of the present application, the circuit breaker has at least two lead-out parts, and inside the circuit breaker, the at least two lead-out parts are electrically connected; wherein, the at least two lead-out parts and the at least two conductive parts are connected in a one-to-one correspondence.

[0025] In the above technical solution, since there are at least two conductive parts and both are electrically connected to the circuit-breaking part, at least two lead-out parts are provided through the circuit-breaking part, and the lead-out parts are electrically connected to the corresponding conductive parts, so as to facilitate the electrical connection between the conductive part and the circuit-breaking part, and make the connection between the circuit-breaking part and the conductive part more regular, which is both beautiful and easy to electrically connect.

[0026] In some embodiments of the present application, a transition portion is provided between the lead-out portion and the corresponding conductive member. The transition portion is provided in the first accommodating portion and is electrically connected to the conductive member and the lead-out portion.

[0027] In the above technical solution, the lead-out portion and the conductive member are electrically connected via the adapter. Since the disconnecting member is frequently removed from the first accommodating portion, wear and tear caused by frequent removal of the disconnecting member is primarily concentrated on the adapter. The conductive member is protected from contact with the disconnecting member and wear, thus reducing the replacement frequency and cycle of the conductive member and extending its service life. Furthermore, as the disconnecting member is a consumable part, only the adapter needs to be replaced. This reduced replacement frequency also reduces the probability of errors in the positioning accuracy of the conductive member on the insulating base caused by replacement of the conductive member.

[0028] In some embodiments of the present application, a first hole is provided on the lead-out portion, a second hole is provided on the adapter portion, and the power-off device further includes a first fastener, which is passed through the first hole and the second hole.

[0029] In the above technical solution, the adapter portion can fix the lead portion, improving the installation reliability and stability of the disconnectable component within the first accommodating portion. The first fastener cooperates with the first hole and the second hole to fix the lead portion to the adapter portion, which is a relatively simple and effective fixing method.

[0030] In some embodiments of the present application, a third hole is provided on the adapter, a fourth hole connected to the first accommodating portion is provided on the insulating base, a fifth hole is provided on the conductive part, and the power-off device also includes a second fastener, which is passed through the fifth hole, the fourth hole and the third hole.

[0031] In the above technical solution, the adapter portion secures the conductive member, improving the reliability and stability of its installation on the insulating base. The lead portion is secured to the adapter portion by the first fastener, the first hole, and the second hole. This provides a simple and effective securing method, and the conductive member can be removed from the insulating base, facilitating repair or replacement.

[0032] In some embodiments of the present application, the circuit breaker has a width direction, and in the width direction, the width of the lead-out portion is smaller than the width of the circuit breaker. The first accommodating portion includes a first space and a second space that are connected to each other. In the width direction, the width of the second space is smaller than the width of the first space. The circuit breaker is arranged in the first space, and the lead-out portion is arranged in the second space.

[0033] In the above technical solution, the width of the lead-out portion is smaller than the width of the circuit-breaking component, which can save materials and reduce the space of the first accommodating portion. The first accommodating portion includes a first space and a second space, and the first space and the circuit-breaking component can be adapted to fit, and the second space and the lead-out portion can be adapted to fit, which is beneficial to reducing the volume of the insulating base.

[0034] In some embodiments of the present application, a setting wall is provided in the first accommodating portion, the setting wall is opposite to the opening, a first connector is provided on the setting wall, a second connector is provided on the disconnecting component, and the second connector is plugged into and matched with the first connector.

[0035] In the above technical solution, the set wall and the opening are located in the assembly direction of the circuit-breaking component, and the first plug-in connector is provided on the set wall. When the circuit-breaking component is installed into the first accommodating portion along the assembly direction, as the circuit-breaking component moves, the second plug-in connector can be plugged into and matched with the first plug-in connector, and the signal on the circuit-breaking component can be transmitted through the first plug-in connector and the second plug-in connector.

[0036] In a second aspect, an embodiment of the present application further provides a battery comprising a power-off device.

[0037] In a third aspect, an embodiment of the present application further provides an electrical device, including a power-off device or a battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0039] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0040] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0041] FIG3 is an exploded view of a power-off device provided in some embodiments of the present application;

[0042] FIG4 is a perspective view of a power-off device provided in some embodiments of the present application;

[0043] FIG5 is a first cross-sectional view of a power-off device provided in some embodiments of the present application;

[0044] FIG6 is a second cross-sectional view of a power-off device provided in some embodiments of the present application.

[0045] Icons: 1000, vehicle; 100, battery; 200, controller; 300, motor; 10, housing; 11, first housing body; 12, second housing body; 20, battery cell; 3, power-off device; 31, insulating base; 31a, fourth hole; 311, setting surface; 312, second mounting hole; 313, fourth mounting hole; 32, disconnecting element; 321, outer end; 322, lifting portion; 323, lead-out portion; 324, second connector; 323a, first hole; 33, conductive element; 33a, fifth hole ; 34. First accommodating portion; 341. First space; 342. Second space; 343. Set wall; 3431. First connector; 34a. Opening; 35. Protrusion; 36. Cover plate; 361. First mounting hole; 37. Second accommodating portion; 38. Sealing ring; 39. Adapter; 39a. Second hole; 39b. Third hole; 4. Fixing plate; 4a. Third mounting hole; 4b. Fifth mounting hole; 4c. Avoidance hole; 41. First fastener; 42. Second fastener; 43. Third fastener; 44. Fourth fastener. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0048] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0050] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0051] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0052] The term "plurality" used in this application refers to two or more (including two).

[0053] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or battery pack. A battery generally includes a casing that encloses one or more battery cells or multiple battery modules. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0054] In this application, battery cells 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 do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0055] A battery cell includes a casing, an electrode assembly, and an electrolyte. The casing is used to hold the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0056] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0057] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and important role. A battery consists of a housing and multiple cells housed within it. As a core component in new energy vehicles, batteries have high requirements for both reliability and cycle life.

[0058] In power batteries, in order to obtain sufficient power, multiple battery cells are usually stacked in an arrangement inside the battery box so that the power battery can provide the high-voltage platform required by the car. As the requirements for new energy vehicles gradually increase, the current highest voltage platform has risen to 1000V, but the energy compartment lacks a high-voltage power-off protection mechanism. There is a risk of high-voltage electrification during assembly and maintenance. In addition, in the event of a short circuit or collision, the high voltage is extremely dangerous. If the power supply cannot be cut off, it is easy to cause a safety accident, and the battery reliability is relatively poor.

[0059] Based on the above considerations, in order to solve the problem of poor reliability of the battery due to the high-voltage circuit, the inventors designed a power-off device 3, including an insulating base 31 and a disconnecting member 32, and at least two conductive members 33 are provided on the insulating base 31; the disconnecting member 32 is detachably provided on the insulating base 31, and the disconnecting member 32 is connected in series and electrically connected to the at least two conductive members 33, so that the assembly formed by the disconnecting member 32 and the at least two conductive members 33 can transmit electrical energy, and the disconnecting member 32 is constructed to be able to disconnect the electrical connection when a preset condition is met.

[0060] The power-off device 3 can be used in a battery 100. In a power-off device 3 of this structure, two conductive members 33 can be connected in series in the high-voltage circuit of the battery 100. When the battery 100 is assembled or repaired, the disconnect member 32 can be removed from the insulating base 31, thereby disconnecting the high-voltage circuit. This helps to eliminate the risk of high voltage electricity between the battery 100 and the electrical device during assembly or repair. When a dangerous situation occurs in the battery 100, the high-voltage circuit is prone to causing safety accidents. At this time, the disconnect member 32 can disconnect the electrical connection when the set conditions are met, reducing the probability of dangerous situations, thereby disconnecting the high-voltage circuit and reducing the probability of safety accidents. Because the disconnect member 32 is detachably mounted on the insulating base 31, the power-off device 3 has both the function of power-off during maintenance and the function of short-circuit power-off protection. The power-off device 3 has both of the above-mentioned power-off functions, the number of parts is relatively small, and the volume is also relatively small, which helps to save installation space.

[0061] The battery 100 disclosed in the embodiments of the present application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. The embodiments of the present application provide an electrical device that uses the battery 100 as a power source. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0062] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0063] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0064] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0065] Please refer to Figure 2, which is an exploded view of the structure of a battery 100 provided in some embodiments of the present application. The battery 100 includes a housing 10 and a plurality of battery cells 20, which are intended to be accommodated within the housing 10. The housing 10 is used to provide an assembly space for the battery cells 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 can include a first housing body 11 and a second housing body 12, which cover each other and together define an assembly space for accommodating the battery cells 20. The second housing body 12 can be a hollow structure with one end open, and the first housing body 11 can be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12, so that the first housing body 11 and the second housing body 12 jointly define an assembly space. The first housing body 11 and the second housing body 12 can also be hollow structures with one end open, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0066] In the battery 100, the multiple battery cells 20 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel configurations within the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery 100 can be constructed by first connecting the multiple battery cells 20 in series, in parallel, or in a hybrid configuration to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid configuration to form a single structure, which is then housed within the housing 10. The battery 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0067] Schematic diagram of a partial structure of a battery 100 provided in some embodiments of the present application. The battery 100 includes multiple rows of battery cells 20. The multiple rows of battery cells 20 can be arranged along the length of the housing 10, with each row of battery cells 20 including multiple battery cells 20 arranged along the width of the housing 10. Alternatively, the multiple rows of battery cells 20 can be arranged along the width of the housing 10, with each row of battery cells 20 including multiple battery cells 20 arranged along the length of the housing 10.

[0068] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be cylindrical, flat, rectangular, or in other shapes. For example, the battery cell 20 is cylindrical.

[0069] In the first aspect, as shown in Figure 3, an embodiment of the present application provides a power-off device 3, including an insulating base 31 and a disconnecting member 32, and at least two conductive members 33 are provided on the insulating base 31; the disconnecting member 32 is detachably provided on the insulating base 31, and the disconnecting member 32 is connected in series with the at least two conductive members 33 and is electrically connected so that the assembly formed by the disconnecting member 32 and the at least two conductive members 33 can transmit electrical energy, and the disconnecting member 32 is constructed to be able to disconnect the electrical connection when a preset condition is met.

[0070] The insulating base 31 may be an insulating base primarily made of insulating material, and may provide a mounting location for other components of the power disconnect device 3. The shape of the insulating base 31 may include, but is not limited to, square or circular. The number of conductive members 33 on the insulating base 31 may include, but is not limited to, two, three, or four, and the number of conductive members 33 may vary depending on the situation and is not a limitation.

[0071] The conductive member 33 may be a conductive component made of a conductive material, for example, the conductive material may include but is not limited to copper or silver. The conductive member 33 may be in the shape of a sheet or a line.

[0072] The circuit breaker 32 is a component that can be disconnected, which can cut off the circuit between the two conductive parts 33 and play a safety protection role. For example, the circuit breaker 32 can be understood as a fuse, that is, a component that can melt when the transmitted current reaches a set value. The set value can be specifically set according to the situation and is not limited here. Specifically, the circuit breaker 32 can also refer to a pyrofuse (explosive fuse or high-temperature fuse, pyrotechnic control switch, instantaneous circuit breaker), that is, when the current reaches a set value, the circuit path inside the circuit breaker 32 can be cut off by controlling the circuit breaker 32 itself or receiving a control instruction from the outside, thereby cutting off the circuit between the two conductive parts 33. Secondly, the disconnection method of the circuit breaker 32 is not limited to the melting of the fuse, and the power can also be cut off by blowing up the connecting wires with explosives. Of course, this is just an example. The disconnection method of the circuit breaker 32 includes but is not limited to the above two methods.

[0073] The power-off device 3 can be used in a battery 100 or other electrical devices. Taking the battery 100 as an example, the assembly formed by the disconnecting element 32 and at least two conductive elements 33 is equivalent to a wire, which is connected in series in the high-voltage circuit of the battery 100. When the power-off device 3 needs to be installed on the battery 100 or when the battery 100 needs to be repaired, the disconnecting element 32 can be removed from the insulating base 31 to disconnect the high-voltage circuit, effectively reducing the risk of high voltage being energized when the power-off device 3 and the battery 100 are assembled. When a dangerous situation occurs in the battery 100, the high-voltage circuit is prone to causing safety accidents. For example, the dangerous situation may be a short circuit. In this case, the disconnecting element 32 can disconnect the electrical connection when the set conditions are met, thereby disconnecting the high-voltage circuit, reducing the probability of dangerous situations, improving the safety and reliability of the battery 100, and reducing the possibility of dangerous situations.

[0074] In the above technical solution, because the power disconnect device 3 integrates the functions of maintenance power disconnection and short-circuit power disconnection, the disconnecting element 32 can not only provide short-circuit power disconnection protection, but also, when performing a maintenance power disconnection, the disconnecting element 32 can be simply removed from the insulating base 31 to cooperate with the insulating base 31 to perform the maintenance power disconnection function, which is beneficial to improving the reliability of the battery 100. At the same time, due to the high integration of the power disconnect device 3, the number of components can be reduced, which is beneficial to optimizing the overall size of the device, reducing the volume of the power disconnect device 3, and thus reducing the installation space required for the power disconnect device 3, and facilitating the installation of other components on the battery 100. Secondly, fewer components can also reduce the input of raw materials, which is beneficial to reducing costs.

[0075] In some embodiments of the present application, the preset condition is that the transmitted current reaches a set value or receives an external control instruction. In this technical solution, the preset condition can be understood as an accident such as a short circuit or collision of the battery 100. At this time, the current on the assembly formed by the disconnecting element 32 and at least two conductive elements 33 will change. When the current reaches the set value, the disconnecting element 32 disconnects the electrical connection. The set value of the current can refer to the short-circuit current, or it can be specifically set as needed, which is not limited here. Alternatively, the preset condition is an external control instruction. When other equipment such as external detection equipment determines that the situation is more dangerous, it can directly issue a control instruction to the disconnecting element 32. After receiving the control instruction, the disconnecting element 32 cuts off the circuit path inside the disconnecting element 32, thereby disconnecting the electrical connection.

[0076] In some embodiments of the present application, as shown in FIG. 3 , FIG. 5 and FIG. 6 , a first accommodating portion 34 is provided on the insulating base 31 . The first accommodating portion 34 has an opening 34 a , and the disconnectable component 32 is at least partially disposed in the first accommodating portion 34 .

[0077] The first accommodating portion 34 can be a slot or hole that serves as a receiving portion, or a component having a slot or hole. For example, the first accommodating portion 34 can be a slot or hole formed on the insulating base 31, into which the circuit-breaking component 32 can be installed through the opening 34a. Alternatively, the first accommodating portion 34 can be a plurality of retaining plates provided on the insulating base 31, with a receiving groove formed between the retaining plates, into which the circuit-breaking component 32 can be installed through the opening 34a.

[0078] In the above technical solution, the first accommodating portion 34 can accommodate at least part of the circuit-breaking component 32 and limit the circuit-breaking component 32, thereby improving the installation reliability and stability between the circuit-breaking component 32 and the insulating base 31. The circuit-breaking component 32 is detachably connected to the insulating base 31 and is limited by the first accommodating portion 34, which can effectively reduce the probability of the circuit-breaking component 32 being detached from the insulating base 31, and is beneficial to improving the reliability of the power-off device 3 when the power is on.

[0079] In some embodiments of the present application, as shown in FIG3 , the insulating base 31 has a setting surface 311 , the opening 34 a is provided on the setting surface 311 , and the setting surface 311 is provided with a ring-shaped protrusion 35 surrounding the circumferential edge of the opening 34 a .

[0080] The setting surface 311 may refer to an end surface of the insulating base 31. As shown in FIG3 , the setting surface 311 may refer to the upper end surface of the insulating base 31. The protrusion 35 may refer to a protruding structure provided on the setting surface 311. The protrusion 35 includes but is not limited to an annular convex edge or an annular rib.

[0081] In the above technical solution, the protrusion 35 forms an annular structure around the circumferential edge of the opening 34a. On the one hand, it can play a guiding role in the installation process of the circuit-breaking component 32, reducing the difficulty of installing the circuit-breaking component 32. On the other hand, it can protect the circuit-breaking component 32. When the power-off device 3 and the battery 100 are assembled, the annular protrusion 35 can reduce the probability of other components on the battery 100 colliding with the circuit-breaking component 32 on the side of the setting surface 311, reduce the damage to the circuit-breaking component 32, improve the safety of the circuit-breaking component 32, and help to extend the service life of the power-off device 3 and improve the reliability of the power-off device 3.

[0082] In some embodiments of the present application, as shown in FIG. 5 , in the protruding direction of the protrusion 35 , at least a portion of the circuit breaker 32 is located in the annular space formed by the protrusion 35 .

[0083] The protruding direction of the protrusion 35 may refer to the third direction (Z direction) in FIG5 , and the circuit-breaking component 32 may be loaded into the first accommodating portion 34 along the third direction, and at least part of the circuit-breaking component 32 is located in the annular space formed by the protrusion 35, so that the nesting depth of the circuit-breaking component 32 and the first accommodating portion 34 is reduced while meeting the installation stability and reliability, and the size of the insulating base 31 in the protruding direction of the protrusion 35 is further reduced, thereby saving the installation space required for the power-off device 3 and providing more ample installation space for other components of the battery 100.

[0084] In some embodiments of the present application, as shown in Figures 3, 4 and 5, the power-off device 3 also includes a cover plate 36, and a setting space is formed between the cover plate 36 and the setting surface 311. The setting space is used to install the fixing plate 4. A second accommodating portion 37 is provided on the side of the cover plate 36 close to the setting surface 311, and a portion of the protrusion 35 is located in the second accommodating portion 37.

[0085] The cover plate 36 may refer to a cover component that can play a protective role.

[0086] The fixing plate 4 may be a component for providing a mounting position for the insulating base 31. For example, the fixing plate 4 may be a component provided on the case 10 of the battery 100; the fixing plate 4 may also be a part of the case 10, that is, the fixing plate 4 may be a wall of the case 10.

[0087] A setting space is formed between the cover plate 36 and the setting surface 311, and the setting space is used to install the fixing plate 4. It can be understood that the cover plate 36 and the setting surface 311 are located on opposite sides of the fixing plate 4. Taking the fixing plate 4 as a part of the box body 10 as an example, the setting surface 311 stops at the inner side surface of the box body 10, and the cover plate 36 stops at the outer side surface of the box body 10. The box body 10 can be provided with an avoidance hole 4c corresponding to the opening 34a, so that the insulating base 31 can be set on the inner side of the box body 10, and the disconnecting component 32 can be inserted or unplugged from the insulating base 31 on the outside of the box body 10. In this way, the installation between the power-off device 3 and the battery 100 is more compact, which can improve space utilization.

[0088] The second receiving portion 37 may be a groove formed on the cover plate 36 or a protruding component provided with a groove on the cover plate 36 .

[0089] In the above technical solution, the cover plate 36 serves to cover the circuit breaker 32, reducing the chance of dust or water stains falling on the circuit breaker 32, thereby reducing the impact of dust or water stains on the circuit breaker 32 and facilitating the reduction of the probability of failure of the circuit breaker 32. Because the setting surface 311 is provided with the protrusion 35, the second receiving portion 37 of the cover plate 36 can receive and avoid the protrusion 35, thereby reducing the impact of the protrusion 35 on the installation of the cover plate 36.

[0090] In some embodiments of the present application, as shown in FIG. 3 and FIG. 5 , the circuit breaker 32 has an outer end 321 close to the opening 34 a , and a lifting portion 322 is provided on the outer end 321 .

[0091] The lifting portion 322 can be a component that facilitates lifting, and includes but is not limited to a hole, a hook, and a handle. For example, if the lifting portion 322 is a hole, the disconnecting element 32 can be removed from the first accommodating portion 34 by engaging the hook with the hole. If the lifting portion 322 is a hook, the disconnecting element 32 can be removed from the first accommodating portion 34 by hooking the hook. If the lifting portion 322 is a handle, the operator can directly pull the disconnecting element 32 out of the first accommodating portion 34 by the handle.

[0092] In this technical solution, when the circuit breaker 32 needs to be removed, the lifting portion 322 can cooperate with the tool to remove the circuit breaker 32 from the first accommodating portion 34, thereby reducing the difficulty of removing the circuit breaker 32. When the battery 100 needs to be repaired or the power-off device 3 needs to be installed on a large battery 100, the lifting portion 322 can improve the removal efficiency of the circuit breaker 32 and improve the repair or installation efficiency of the battery 100.

[0093] In some embodiments of the present application, as shown in Figures 3 and 5, the lifting portion 322 is a handle, and in the protruding direction of the protrusion 35, the height of the handle relative to the setting surface 311 is greater than or equal to the height of the protrusion 35; and when the height of the handle relative to the setting surface 311 is greater than the height of the protrusion 35, the handle can be received by the second accommodating portion 37.

[0094] In the above technical solution, it can be understood that the handle can extend out of the annular space formed by the protrusion 35 on the setting surface 311, and there are relatively few obstacles in the space around the handle. The operator or external tools can more easily act on the handle, making it convenient to remove the circuit breaker 32 from the first accommodating portion 34.

[0095] In some embodiments of the present application, the insulating base 31 has a setting surface 311, the circuit-breaking component 32 is arranged on the setting surface 311, and the power-off device 3 also includes a cover plate 36, and a setting space is formed between the cover plate 36 and the setting surface 311. The setting space is used to install the fixing plate 4. A second accommodating portion 37 is provided on the side of the cover plate 36 close to the setting surface 311, and at least a portion of the circuit-breaking component 32 is located in the second accommodating portion 37.

[0096] The cover plate 36 may be a housing component with a greater height.

[0097] The second accommodating portion 37 may be a groove formed on the cover plate 36 . The circuit breaker 32 is disposed on the setting surface 311 so that at least a portion of the circuit breaker 32 can be located within the second accommodating portion 37 .

[0098] In the above technical solution, the cover plate 36 can accommodate the circuit-breaking component 32, reducing the probability of dust or water stains falling on the circuit-breaking component 32, thereby reducing the impact of dust or water stains on the circuit-breaking component 32, which is beneficial to reducing the probability of failure of the circuit-breaking component 32.

[0099] In some embodiments of the present application, as shown in FIG3 , the power disconnect device 3 further includes a sealing ring 38, which is disposed on a side of the cover plate 36 near the setting surface 311. In this technical solution, the sealing ring 38 can provide a seal between the cover plate 36 and the fixing plate 4, thereby improving the dust and water resistance of the circuit breaker 32, further reducing the impact of dust and water stains on the circuit breaker 32, and reducing the probability of failure of the circuit breaker 32.

[0100] In some embodiments of the present application, as shown in Figure 3, a first mounting hole 361 is provided on the cover plate 36, a second mounting hole 312 is provided on the setting surface 311, a third mounting hole 4a is provided on the fixing plate 4, and the power-off device 3 also includes a third fastener 43, which is passed through the first mounting hole 361, the second mounting hole 312 and the third mounting hole 4a.

[0101] In this technical solution, the cover 36, the insulating base 31 and the fixing plate 4 are fixed together by cooperating with the third fastener 43 and the first mounting hole 361, the second mounting hole 312 and the third mounting hole 4a. The fixing method is relatively simple and the fixing effect is relatively good.

[0102] In some embodiments of the present application, as shown in Figure 3, a fourth mounting hole 313 is provided on the setting surface 311, and a fifth mounting hole 4b is provided on the fixing plate 4. The power-off device 3 also includes a fourth fastener 44, which is passed through the fourth mounting hole 313 and the fifth mounting hole 4b to first fix the insulating base 31 on the fixing plate 4.

[0103] Optionally, the second mounting hole 312 is a screw hole, and the third fastener 43 is a bolt.

[0104] In some embodiments of the present application, as shown in Figures 3 and 5, the circuit-breaking component 32 has at least two lead-out portions 323, and inside the circuit-breaking component 32, the at least two lead-out portions 323 are electrically connected; wherein, the at least two lead-out portions 323 and the at least two conductive members 33 are connected one-to-one.

[0105] The lead portion 323 may refer to a power connection component extending from the disconnectable element 32, which may include but is not limited to a lead piece and a lead wire. The lead portion 323 may be made of a conductive material, including but not limited to copper and silver.

[0106] In the above technical solution, since there are at least two conductive parts 33 and both are electrically connected to the circuit-breaking part 32, at least two lead-out parts 323 are provided through the circuit-breaking part 32, and the lead-out parts 323 are electrically connected to the corresponding conductive parts 33, so as to facilitate the electrical connection between the conductive parts 33 and the circuit-breaking part 32, so that the connection between the circuit-breaking part 32 and the conductive parts 33 is relatively regular, which is both beautiful and easy to electrically connect.

[0107] In some embodiments of the present application, as shown in Figures 3 and 5, a transition portion 39 is provided between the lead-out portion 323 and the corresponding conductive member 33. The transition portion 39 is provided in the first accommodating portion 34 and is electrically connected to the conductive member 33 and the lead-out portion 323.

[0108] The transition portion 39 may refer to a component that guides current between the lead-out portion 323 and the conductive member 33 . The transition portion 39 may be made of a conductive material, including but not limited to copper and silver.

[0109] In the above technical solution, the lead portion 323 and the conductive member 33 are electrically connected via the adapter portion 39. Since the disconnecting member 32 is frequently removed from the first accommodating portion 34, the wear and tear caused by frequent removal of the disconnecting member 32 is primarily concentrated on the adapter portion 39. The conductive member 33 does not come into contact with the disconnecting member 32 and suffer wear. This reduces the frequency and cycle of replacement of the conductive member 33 and extends the service life of the conductive member 33. Furthermore, as a consumable part, only the adapter portion 39 needs to be replaced. This reduced replacement frequency of the conductive member 33 also reduces the probability of errors in the positioning accuracy of the conductive member 33 on the insulating base 31 caused by replacement of the conductive member 33.

[0110] In some embodiments of the present application, as shown in Figures 3 and 5, a first hole 323a is provided on the lead-out portion 323, a second hole 39a is provided on the adapter portion 39, and the power-off device 3 further includes a first fastener 41, which is passed through the first hole 323a and the second hole 39a.

[0111] In the above technical solution, the adapter portion 39 serves to secure the lead portion 323, thereby improving the reliability and stability of the installation of the disconnecting element 32 within the first accommodating portion 34. The first fastener 41 cooperates with the first hole 323a and the second hole 39a to secure the lead portion 323 to the adapter portion 39, providing a relatively simple and effective securing method.

[0112] In some embodiments of the present application, as shown in Figure 5, a third hole 39b is provided on the adapter portion 39, a fourth hole 31a connected to the first accommodating portion 34 is provided on the insulating base 31, a fifth hole 33a is provided on the conductive member 33, and the power-off device 3 further includes a second fastener 42, which is passed through the fifth hole 33a, the fourth hole 31a and the third hole 39b.

[0113] In the above technical solution, the adapter portion 39 serves to secure the conductive member 33, improving the reliability and stability of the installation of the conductive member 33 on the insulating base 31. The first fastener 41 cooperates with the first hole 323a and the second hole 39a to secure the lead portion 323 to the adapter portion 39. This provides a relatively simple and effective securing method. Furthermore, the conductive member 33 can be removed from the insulating base 31, facilitating maintenance or replacement of the conductive member 33.

[0114] In some embodiments of the present application, as shown in FIG5 , the conductive member 33 is disposed at an end of the insulating base 31 away from the opening 34a, and the lead portion 323 is disposed near the opening 34a of the disconnecting member 32. In this technical solution, the conductive member 33 and the lead portion 323 are relatively far apart and are electrically connected via the adapter 39. Since the disconnecting member 32 is located within the first accommodating portion 34, the conductive member 33 and the lead portion 323 are not too close together, which helps to improve the stability and reliability of the disconnecting member 32 within the first accommodating portion 34.

[0115] In some embodiments of the present application, as shown in Figures 3 and 6, the circuit-breaking component 32 has a width direction, and in the width direction, the width of the lead-out portion 323 is smaller than the width of the circuit-breaking component 32. The first accommodating portion 34 includes a first space 341 and a second space 342 that are connected to each other. In the width direction, the width of the second space 342 is smaller than the width of the first space 341. The circuit-breaking component 32 is arranged in the first space 341, and the lead-out portion 323 is arranged in the second space 342.

[0116] As shown in Figure 3 , the width direction may refer to the direction in which the circuit breaker 32 is smaller, for example, the second direction (i.e., the Y direction) in Figure 3 . The two lead portions 323 may be located on either side of the length direction of the circuit breaker 32, where the length direction may refer to the second direction (i.e., the X direction) in Figure 3 . As the component of the circuit breaker 32 that electrically contacts the conductive member 33, the lead portions 323 having a width smaller than the width of the circuit breaker 32 can reduce material and space, thereby reducing the space in the first accommodating portion 34 and the volume of the insulating base 31.

[0117] In the first accommodating portion 34, the first space 341 accommodates the circuit breaker 32 and acts as a position limiter for the circuit breaker 32. The second space 342 accommodates the lead portion 323 and acts as a position limiter for the lead portion 323. By separately limiting the circuit breaker 32 and the lead portion 323, loosening of the circuit breaker 32 and the lead portion 323 can be effectively prevented, thereby improving the installation reliability and stability of the circuit breaker 32 and the lead portion 323. Furthermore, the first space 341 accommodates the circuit breaker 32, and the second space 342 accommodates the lead portion 323. This reduces the volume of the first accommodating portion 34. If the first accommodating portion 34 is a position limiter protruding from the insulating base 31, material can be saved. If the first accommodating portion 34 is formed as a groove in the insulating base 31, the size of the groove can be reduced, which helps to improve the strength of the insulating base 31 and extend its service life.

[0118] In the above technical solution, the width of the lead-out portion 323 is smaller than the width of the circuit-breaking component 32, which can save materials and reduce the space of the first accommodating portion 34. The first accommodating portion 34 includes a first space 341 and a second space 342, and the first space 341 and the circuit-breaking component 32 can adapt to fit, and the second space 342 and the lead-out portion 323 can adapt to fit, which is beneficial to reducing the volume of the insulating base 31.

[0119] In some embodiments of the present application, as shown in Figure 5, a setting wall 343 is provided in the first accommodating portion 34, and the setting wall 343 is opposite to the opening 34a. A first connector 3431 is provided on the setting wall 343, and a second connector 324 is provided on the disconnecting component 32, and the second connector 324 is plugged into and matched with the first connector 3431.

[0120] It can be understood that the setting wall 343 and the opening 34a are located in the assembly direction of the circuit-breaking component 32, and the first connector 3431 is provided on the setting wall 343. When the circuit-breaking component 32 is installed into the first accommodating portion 34 along the assembly direction, as the circuit-breaking component 32 moves, the second connector 324 can be plugged into and matched with the first connector 3431, and the signal on the circuit-breaking component 32 can be transmitted through the first connector 3431 and the second connector 324.

[0121] In one embodiment provided in the present application, the power-off device 3 includes an insulating base 31, a circuit-breaking component 32, and a cover plate 36. Two conductive components 33 are provided on the insulating base 31, and the conductive components 33 can be connecting copper bars. A receiving groove is provided on the insulating base 31, and the circuit-breaking component 32 can be a pyrofuse and is provided in the receiving groove. The circuit-breaking component 32 has two lead-out parts 323, and the two lead-out parts 323 are electrically connected to the two conductive components 33 respectively. Among them, the two conductive components 33 are detachably connected to the insulating base 31 by locking bolts, and the two lead-out parts 323 are detachably provided in the receiving groove by locking bolts. The cover plate 36 is a sealing protective cover, and a fixing plate 4 is provided between the insulating base 31 and the cover plate 36. The cover plate 36 passes through the fixing plate 4 by locking bolts and is fixed to the insulating base 31.

[0122] In a second aspect, an embodiment of the present application further provides a battery 100 including a power-off device 3 .

[0123] In a third aspect, an embodiment of the present application further provides an electrical device, including a power-off device 3 or a battery 100 .

[0124] The electrical device may be a vehicle 1000, which includes a battery 100. The battery 100 is integrated into the chassis of the vehicle 1000, so that the battery 100 and the chassis constitute a CTC integrated chassis. By integrating the maintenance power-off and short-circuit power-off of the high-voltage circuit into one power-off device 3, one component integrates two functions, which can save space and meet the space requirements provided by the energy compartment of the vehicle 1000.

[0125] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0126] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A power-off device, wherein: include: An insulating base, wherein at least two conductive members are provided on the insulating base; A circuit breaker, wherein the circuit breaker is detachably arranged on the insulating base, the circuit breaker is connected in series with at least two of the conductive members and is electrically connected so that the assembly formed by the circuit breaker and at least two of the conductive members can transmit electrical energy, and the circuit breaker is constructed to be able to disconnect the electrical connection when a preset condition is met.

2. The power cutoff device according to claim 1, wherein: The preset condition is that the transmitted current reaches a set value or receives an external control instruction.

3. The power cutoff device according to claim 1, wherein: The insulating base is provided with a first accommodating portion, the first accommodating portion has an opening, and the circuit-breaking component is at least partially arranged in the first accommodating portion.

4. The power cutoff device according to claim 3, wherein: The insulating base has a setting surface, the opening is arranged on the setting surface, and a protrusion in a ring shape and surrounding the circumferential edge of the opening is arranged on the setting surface.

5. The power cutoff device according to claim 4, wherein: In the protruding direction of the protrusion, at least a portion of the circuit breaker is located in the annular space formed by the protrusion.

6. The power cutoff device according to claim 5, wherein: The power-off device further comprises a cover plate, a setting space is formed between the cover plate and the setting surface, the setting space is used to install a fixing plate, a second accommodating portion is provided on one side of the cover plate close to the setting surface, and a portion of the convex portion is located in the second accommodating portion.

7. The power cutoff device according to claim 4, wherein: The circuit breaker has an outer end close to the opening, and a lifting portion is provided on the outer end.

8. The power cutoff device according to claim 7, wherein: The lifting portion is a handle, and in the protruding direction of the protrusion, the height of the handle relative to the setting surface is greater than or equal to the height of the protrusion.

9. The power cutoff device according to claim 1, wherein: The insulating base has a setting surface, the circuit-breaking component is arranged on the setting surface, the power-off device also includes a cover plate, a setting space is formed between the cover plate and the setting surface, the setting space is used to install a fixing plate, and a second accommodating portion is provided on one side of the cover plate close to the setting surface, and at least a part of the circuit-breaking component is located in the second accommodating portion.

10. The power disconnecting device according to claim 6 or 9, wherein: The power-off device further comprises a sealing ring, and the sealing ring is arranged on a side of the cover plate close to the setting surface.

11. The power cutoff device according to claim 3, wherein: The circuit breaker has at least two lead-out parts, and inside the circuit breaker, the at least two lead-out parts are electrically connected; wherein at least two of the lead-out parts and at least two of the conductive parts are connected in a one-to-one correspondence.

12. The power disconnecting device according to claim 11, wherein: A transition portion is provided between the lead-out portion and the corresponding conductive member. The transition portion is provided in the first accommodating portion and is electrically connected to the conductive member and the lead-out portion.

13. The power disconnecting device according to claim 12, wherein: The lead-out portion is provided with a first hole, the adapter portion is provided with a second hole, and the power-off device further comprises a first fastener, which is passed through the first hole and the second hole.

14. The power disconnecting device according to claim 12, wherein: The adapter portion is provided with a third hole, the insulating base is provided with a fourth hole connected to the first accommodating portion, the conductive member is provided with a fifth hole, and the power-off device further includes a second fastener, which is passed through the fifth hole, the fourth hole and the third hole.

15. The power disconnecting device according to claim 11, wherein: The circuit-breaking component has a width direction, in which the width of the lead-out portion is smaller than the width of the circuit-breaking component, the first accommodating portion includes a first space and a second space connected to each other, in which the width of the second space is smaller than the width of the first space, the circuit-breaking component is arranged in the first space, and the lead-out portion is arranged in the second space.

16. The power disconnecting device according to claim 3, wherein: The first accommodating portion has a setting wall therein, the setting wall is directly opposite to the opening, a first plug-in connector is arranged on the setting wall, a second plug-in connector is arranged on the disconnectable circuit component, and the second plug-in connector is plug-matched with the first plug-in connector.

17. A battery, wherein: Comprising a power disconnecting device as claimed in any one of claims 1 to 16.

18. An electrical device, wherein: The method comprises the power-off device according to any one of claims 1 to 16, or the battery according to claim 17.

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