Power-off device, battery and power utilization device

Abstract

The invention discloses a power-off device, a battery and a power utilization device, and the power-off device comprises an insulating base which is provided with at least two conductive parts; and the circuit breaking part is detachably arranged on the insulating base, the circuit breaking part is connected with the at least two conductive parts in series and is electrically connected with the at least two conductive parts, so that an assembly formed by the circuit breaking part and the at least two conductive parts can transmit electric energy, and the circuit breaking part is constructed to be capable of breaking the electrical connection when a preset condition is met. The cut-off device integrates the functions of power failure maintenance and short-circuit power failure protection, the circuit breaking piece can play a role in short-circuit power failure protection and can be matched with the insulation base to play a role in power failure maintenance only by detaching the circuit breaking piece from the insulation base during power failure maintenance, the integration degree of the cut-off device is high, and the service life of the cut-off device is prolonged. The number of parts can be reduced, the overall size of the device can be optimized, and the size of the cutting device is reduced.

Description

Technical Field

[0001] 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

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and multiple battery cells contained in the box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety and service life. However, due to the existence of high-voltage circuits on the battery and the lack of a high-voltage power-off protection mechanism, the reliability of the battery is relatively poor, which affects the battery's performance and service life, resulting in greater safety hazards during the use of the battery, which is not conducive to the safety of consumers. Summary of the invention

[0003] 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 high-voltage circuit.

[0004] 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 circuit-breaking 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 an assembly formed by the circuit-breaking part and the at least two conductive parts can transmit electrical energy, and the circuit-breaking part is constructed to be able to disconnect the electrical connection when a preset condition is met.

[0005] 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 can cooperate with the insulating base to play the role of maintenance power-off when the maintenance power is cut off, only the disconnecting component needs to be removed from the insulating base, and it can play the role of maintenance power-off, which is beneficial to improve 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 optimize the overall size of the device, reduce the volume of the disconnecting device, and then reduce the installation space required for the disconnecting device, which is beneficial to the installation of other components on the battery.

[0006] 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 battery short circuit or a collision. At this time, the current on the assembly formed by the breakable component and at least two conductive parts will change. When the current reaches the set value, the breakable 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, a control instruction can be directly issued to the breakable component. After receiving the control instruction, the breakable component cuts off the circuit path inside the breakable 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.

[0007] 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 circuit-breaking component is at least partially disposed in the first accommodating portion.

[0008] 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 cutting device when the power is on.

[0009] In some embodiments of the present application, 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.

[0010] In the above technical solution, the convex portion forms an annular structure around the circumferential edge of the opening, which can, on the one hand, play a guiding role in the installation process of the circuit-breaking component and reduce the difficulty of installing the circuit-breaking component, and on the other hand, can protect the circuit-breaking component. When the cutting device and the battery are assembled, the annular convex portion 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 cutting device and improve the reliability of the cutting device.

[0011] 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.

[0012] 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 can reduce the size of the insulating base in the protruding direction of the protrusion while meeting the installation stability and reliability, and further reduce the volume of the cutting device, thereby saving the installation space required for the cutting device and providing more ample installation space for other components of the battery.

[0013] In some embodiments of the present application, 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 the fixing plate, a second accommodating portion is provided on one side of the cover plate close to the setting surface, and the protruding portion is located in the second accommodating portion.

[0014] In the above technical solution, the cover plate can cover the circuit-breaking component, reduce the probability of dust or water stains falling on the circuit-breaking component, thereby reducing the impact of dust or water stains on the circuit-breaking component, which is conducive to reducing the probability of failure of the circuit-breaking component. Since the setting surface is provided with a convex portion, the second accommodating portion of the cover plate can play a role in avoiding the convex portion, reducing the impact of the convex portion on the installation of the cover plate.

[0015] 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.

[0016] In this technical solution, when the circuit breaker needs to be disassembled, the lifting 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 lifting part can improve the efficiency of disassembly of the circuit breaker, thereby improving the efficiency of battery repair or installation.

[0017] 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.

[0018] 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 on 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.

[0019] In some embodiments of the present application, the insulating base has a setting surface, the circuit breaker is arranged on the setting surface, 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 the fixing plate, a second accommodating portion is provided on one side of the cover plate close to the setting surface, and at least part of the circuit breaker is located in the second accommodating portion. In this technical solution, the cover plate can play a role in accommodating the circuit breaker, reducing the probability of dust or water stains falling on the circuit breaker, thereby reducing the impact of dust or water stains on the circuit breaker, which is conducive to reducing the probability of failure of the circuit breaker.

[0020] In some embodiments of the present application, the power-off device further includes a sealing ring, which is arranged on a side of the cover plate close to the setting surface. In this technical solution, the sealing ring can play a sealing role between the cover plate and the fixing plate, improve the dustproof and waterproof performance of the circuit-breaking component, further reduce the impact of dust or water stains on the circuit-breaking component, and reduce the probability of failure of the circuit-breaking component.

[0021] In some embodiments of the present application, the circuit breaker has at least two lead-out parts, and the at least two lead-out parts are electrically connected inside the circuit breaker; wherein the at least two lead-out parts and the at least two conductive parts are connected in a one-to-one correspondence.

[0022] 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.

[0023] 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.

[0024] In the above technical solution, the lead-out part and the conductive part are electrically connected through the adapter part. Since the disconnectable part is frequently disassembled from the first accommodating part, the wear caused by the frequent disassembly of the disconnectable part is mainly concentrated on the adapter part. The conductive part will not contact the disconnectable part and cause loss, which can reduce the replacement frequency and cycle of the conductive part and extend the service life of the conductive part. Moreover, as a consumable part, only the adapter part needs to be replaced. Since the replacement frequency of the conductive part is reduced, the probability of errors in the positioning accuracy of the conductive part on the insulating base caused by the replacement of the conductive part can also be reduced.

[0025] 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.

[0026] In the above technical solution, the adapter can fix the lead-out part, thereby improving the installation reliability and stability of the circuit breaker in the first accommodating part. The lead-out part is fixed to the adapter by the first fastener and the first hole and the second hole, and the fixing method is relatively simple and the fixing effect is relatively good.

[0027] 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 further includes a second fastener, which is passed through the fifth hole, the fourth hole and the third hole.

[0028] In the above technical solution, the adapter can play a role in fixing the conductive member, improving the reliability and stability of the installation of the conductive member on the insulating base. The lead-out portion is fixed to the adapter by the first fastener and the first hole and the second hole. The fixing method is relatively simple and the fixing effect is relatively good. The conductive member can be disassembled on the insulating base, which is convenient for the maintenance or replacement of the conductive member.

[0029] 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 connected to each other, and 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.

[0030] 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.

[0031] 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 circuit breaker, and the second connector is plugged into and matched with the first connector.

[0032] 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 arranged 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 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.

[0033] In a second aspect, an embodiment of the present application further provides a battery, comprising a power-off device.

[0034] 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

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0037] Figure 2 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0038] Figure 3 An exploded view of a power-off device provided in some embodiments of the present application;

[0039] Figure 4 A three-dimensional diagram of a power-off device provided in some embodiments of the present application;

[0040] Figure 5 A cross-sectional view of a power-off device provided in some embodiments of the present application Figure 1 ;

[0041] Figure 6 A cross-sectional view of a power-off device provided in some embodiments of the present application Figure 2 .

[0042] 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, disconnectable member; 321, outer end; 322, lifting portion; 323, lead-out portion; 324, second connector; 323a, first hole; 33, conductive member; 33a, fifth hole ; 34, first accommodating portion; 341, first space; 342, second space; 343, set wall; 3431, first connector; 34a, opening; 35, convex portion; 36, cover plate; 361, first mounting hole; 37, second accommodating portion; 38, sealing ring; 39, transition portion; 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

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0045] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0048] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0049] The term "plurality" used in the present application refers to two or more (including two).

[0050] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0051] In the present 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 the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0052] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed 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 a positive electrode ear. 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 includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0053] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0054] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and multiple battery cells contained in the box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of reliability and cycle life.

[0055] In power batteries, in order to obtain sufficient power, multiple battery cells in the battery box are usually stacked in an arrangement 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, and 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 reliability of the battery is relatively poor.

[0056] Based on the above considerations, in order to solve the problem of poor reliability of the battery due to the high-voltage circuit, the inventor designed a power-off device 3, including an insulating base 31 and a disconnecting component 32, and at least two conductive components 33 are provided on the insulating base 31; the disconnecting component 32 is detachably provided on the insulating base 31, and the disconnecting component 32 is connected in series and electrically connected with the at least two conductive components 33, so that the assembly formed by the disconnecting component 32 and the at least two conductive components 33 can transmit electrical energy, and the disconnecting component 32 is constructed to be able to disconnect the electrical connection when a preset condition is met.

[0057] The power-off device 3 can be applied to the battery 100. In the 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 circuit-breaking member 32 can be removed from the insulating base 31, thereby cutting off the high-voltage circuit, which is conducive to eliminating the risk of high-voltage electrification 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 cause a safety accident. At this time, the circuit-breaking member 32 can disconnect the electrical connection when the set conditions are met, reducing the probability of the dangerous situation, thereby cutting off the high-voltage circuit and reducing the probability of the safety accident. Since the circuit-breaking member 32 is detachably arranged on the insulating base 31, the power-off device 3 has both the function of maintenance power-off and the function of short-circuit power-off protection. The power-off device 3 has the above two power-off functions at the same time, the number of parts is relatively small, and the volume is relatively small, which is conducive to saving installation space.

[0058] The battery 100 disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The embodiment of the present application provides an electrical device using the battery 100 as a power source, and the electrical device can be, but not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0059] 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.

[0060] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may 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 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and 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.

[0061] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0062] Please refer to Figure 2 , Figure 2The structural exploded diagram of the battery 100 provided for some embodiments of the present application. The battery 100 includes a box body 10 and a plurality of battery cells 20, and the battery cells 20 are used to be accommodated in the box body 10. Among them, the box body 10 is used to provide an assembly space for the battery cells 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cells 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box 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.

[0063] In the battery 100, multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 20 are connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between multiple battery cells 20.

[0064] A 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, which can be arranged along the length direction of the box 10, and each row of battery cells 20 includes multiple battery cells 20 arranged along the width direction of the box 10, or multiple rows of battery cells 20 can be arranged along the width direction of the box 10, and each row of battery cells 20 includes multiple battery cells 20 arranged along the length direction of the box 10.

[0065] Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular or in other shapes. For example, the shape of the battery cell 20 is cylindrical.

[0066] First, as Figure 3As shown, an embodiment of the present application provides a power disconnecting device 3, including an insulating base 31 and a disconnecting component 32, and at least two conductive components 33 are provided on the insulating base 31; the disconnecting component 32 is detachably provided on the insulating base 31, and the disconnecting component 32 is connected in series with the at least two conductive components 33 and is electrically connected so that the assembly formed by the disconnecting component 32 and the at least two conductive components 33 can transmit electrical energy, and the disconnecting component 32 is constructed to be able to disconnect the electrical connection when a preset condition is met.

[0067] The insulating base 31 may refer to a base with insulating properties, which is mainly made of insulating material and can provide a mounting position for other components of the power-off device 3. The shape of the insulating base 31 includes but is not limited to square or circular, etc. Among them, the conductive members 33 on the insulating base 31 may include but are not limited to two, three, four, etc. The number of conductive members 33 can be specifically set according to the situation, and is not limited here.

[0068] The conductive member 33 may refer to 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.

[0069] 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 role in safety protection. For example, the circuit breaker 32 can be understood as a fuse, that is, a component that can be blown 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 command 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 fuse blowing, and the power can also be cut off by blowing up the connecting wiring with explosives. Of course, this is just an example, and the disconnection method of the circuit breaker 32 includes but is not limited to the above two methods.

[0070] The power-off device 3 can be applied to the battery 100 or other electrical devices. Taking the battery 100 as an example, the assembly formed by the circuit-breaking component 32 and at least two conductive components 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 the battery 100 needs to be repaired, the circuit-breaking component 32 can be removed from the insulating base 31 first, thereby cutting off the high-voltage circuit, effectively reducing the risk of high voltage being charged 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 cause safety accidents. For example, the dangerous situation may refer to a short circuit in the circuit. At this time, the circuit-breaking component 32 can disconnect the electrical connection when the set conditions are met, thereby cutting off 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.

[0071] In the above technical solution, since the power-off device 3 integrates the functions of maintenance power-off and short-circuit power-off, the circuit-breaking component 32 can not only play the role of short-circuit power-off protection, but also only needs to remove the circuit-breaking component 32 from the insulating base 31 during maintenance power-off, so that it can cooperate with the insulating base 31 to play the role of maintenance power-off, which is beneficial to improve the reliability of the battery 100. At the same time, since the integration of the power-off device 3 is relatively high, the number of parts can be reduced, which is beneficial to optimize the overall size of the device, reduce the volume of the power-off device 3, and further reduce the installation space required for the power-off device 3, and is beneficial to the installation of other parts on the battery 100. Secondly, fewer parts can also reduce the input of raw materials, which is beneficial to reduce costs.

[0072] 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 circuit breaker 32 and at least two conductive members 33 will change. When the current reaches the set value, the circuit breaker 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, a control instruction can be directly issued to the circuit breaker 32. After receiving the control instruction, the circuit breaker 32 cuts off the circuit path inside the circuit breaker 32, thereby disconnecting the electrical connection.

[0073] In some embodiments of the present application, Figure 3 , Figure 5 and Figure 6 As shown, a first accommodating portion 34 is provided on the insulating base 31 . The first accommodating portion 34 has an opening 34 a . The circuit breaker 32 is at least partially disposed in the first accommodating portion 34 .

[0074] The first accommodating portion 34 may refer to a slot or hole for accommodating, or a component having a slot or hole. For example, the first accommodating portion 34 may be a slot or hole provided on the insulating base 31, and the circuit breaker 32 may be installed in the slot or hole through the opening 34a. Alternatively, the first accommodating portion 34 may also be a plurality of limit plates provided on the insulating base 31, and a containing groove is formed between the plurality of limit plates, and the circuit breaker 32 may be provided in the containing groove through the opening 34a.

[0075] 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.

[0076] In some embodiments of the present application, Figure 3 As shown, the insulating base 31 has a setting surface 311 , the opening 34 a is arranged on the setting surface 311 , and the setting surface 311 is provided with a protrusion 35 which is annular and surrounds the circumferential edge of the opening 34 a .

[0077] The setting surface 311 may refer to an end surface of the insulating base 31, such as Figure 3 As shown, the setting surface 311 may refer to the upper end surface of the insulating base 31. The convex portion 35 may refer to a protruding structure provided on the setting surface 311, and the convex portion 35 includes but is not limited to an annular convex edge or an annular rib.

[0078] In the above technical scheme, 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.

[0079] In some embodiments of the present application, Figure 5 As shown, 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 .

[0080] The protruding direction of the protrusion 35 may refer to Figure 5In the third direction (Z direction), the circuit-breaking component 32 can 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 can reduce the size of the insulating base 31 in the protruding direction of the protrusion 35 while meeting the installation stability and reliability, and further reduce the volume of the power-off device 3, 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.

[0081] In some embodiments of the present application, Figure 3 , Figure 4 and Figure 5 As shown, 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 , and the setting space is used to install the fixing plate 4 , and a second accommodating portion 37 is provided on one side of the cover plate 36 close to the setting surface 311 , and part of the protrusion 35 is located in the second accommodating portion 37 .

[0082] The cover plate 36 may refer to a cover component that can play a protective role.

[0083] The fixing plate 4 may refer to 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 box 10 of the battery 100; the fixing plate 4 may also be a part of the box 10, that is, the fixing plate 4 may be a box wall of the box 10.

[0084] 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 pulled out 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 the space utilization rate.

[0085] The second receiving portion 37 may be a groove formed on the cover plate 36 , or a protruding component having a groove on the cover plate 36 .

[0086] In the above technical solution, the cover plate 36 can cover the circuit breaker 32, reduce the probability 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, which is conducive to reducing the probability of failure of the circuit breaker 32. Since the setting surface 311 is provided with a convex portion 35, the second receiving portion 37 on the cover plate 36 can receive and avoid the convex portion 35, reducing the impact of the convex portion 35 on the installation of the cover plate 36.

[0087] In some embodiments of the present application, Figure 3 and Figure 5 As shown, 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 .

[0088] The lifting portion 322 may refer to a component that facilitates lifting, and includes but is not limited to a hole, a hook, and a handle. For example, when the lifting portion 322 is a hole, the circuit breaker 32 can be removed from the first accommodating portion 34 by means of a hook that cooperates with the hole; when the lifting portion 322 is a hook, the circuit breaker 32 can be removed from the first accommodating portion 34 by hanging the hook on the hook; when the lifting portion 322 is a handle, the operator can directly pull the circuit breaker 32 out of the first accommodating portion 34 through the handle.

[0089] 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 disassembly efficiency of the circuit breaker 32, thereby improving the repair or installation efficiency of the battery 100.

[0090] In some embodiments of the present application, Figure 3 and Figure 5 As shown, 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.

[0091] 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 on 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.

[0092] In some embodiments of the present application, the insulating base 31 has a setting surface 311, the circuit breaker 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, and 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 part of the circuit breaker 32 is located in the second accommodating portion 37.

[0093] The cover plate 36 may be a housing component having a greater height.

[0094] 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 may be located in the second accommodating portion 37 .

[0095] In the above technical solution, the cover plate 36 can accommodate the circuit-breaking component 32, reduce 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.

[0096] In some embodiments of the present application, Figure 3 As shown, the power disconnecting device 3 further includes a sealing ring 38, which is arranged on a side of the cover plate 36 close to the setting surface 311. In this technical solution, the sealing ring 38 can play a sealing role between the cover plate 36 and the fixing plate 4, improve the dustproof and waterproof performance of the circuit breaker 32, further reduce the impact of dust or water stains on the circuit breaker 32, and reduce the probability of failure of the circuit breaker 32.

[0097] In some embodiments of the present application, Figure 3 As shown, 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.

[0098] In this technical solution, the cover plate 36, the insulating base 31 and the fixing plate 4 are fixed together by means of 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.

[0099] In some embodiments of the present application, Figure 3 As shown, a fourth mounting hole 313 is provided on the setting surface 311, a fifth mounting hole 4b is provided on the fixing plate 4, and 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.

[0100] Optionally, the second mounting hole 312 is a screw hole, and the third fastener 43 is a bolt.

[0101] In some embodiments of the present application, Figure 3 and Figure 5 As shown, the circuit breaker 32 has at least two lead-out portions 323 , and inside the circuit breaker 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.

[0102] The lead-out portion 323 may refer to a power connection component extending from the disconnectable circuit breaker 32, which may include but is not limited to a lead-out sheet and a lead-out wire. The lead-out portion 323 is made of a conductive material, including but not limited to copper and silver.

[0103] 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.

[0104] In some embodiments of the present application, Figure 3 and Figure 5 As shown, 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 .

[0105] 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 is made of a conductive material, including but not limited to copper and silver.

[0106] In the above technical solution, the lead-out portion 323 and the conductive member 33 are electrically connected through the adapter portion 39. Since the disconnectable member 32 is frequently disassembled from the first accommodating portion 34, the wear caused by the frequent disassembly of the disconnectable member 32 is mainly concentrated on the adapter portion 39. The conductive member 33 will not contact the disconnectable member 32 and cause loss, which can reduce the replacement frequency and cycle of the conductive member 33 and extend the service life of the conductive member 33. Moreover, as a consumable part, the adapter portion 39 only needs to be replaced. Since the replacement frequency of the conductive member 33 is reduced, the probability of errors in the positioning accuracy of the conductive member 33 on the insulating base 31 caused by the replacement of the conductive member 33 can also be reduced.

[0107] In some embodiments of the present application, Figure 3 and Figure 5As shown, the lead-out portion 323 is provided with a first hole 323a, the adapter portion 39 is provided with a second hole 39a, 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.

[0108] In the above technical solution, the adapter 39 can play the role of fixing the lead-out portion 323, thereby improving the installation reliability and stability of the disconnectable component 32 in the first accommodating portion 34. The lead-out portion 323 is fixed to the adapter 39 by the first fastener 41, the first hole 323a and the second hole 39a, and the fixing method is relatively simple and the fixing effect is relatively good.

[0109] In some embodiments of the present application, Figure 5 As shown, the adapter portion 39 is provided with a third hole 39b, the insulating base 31 is provided with a fourth hole 31a connected to the first accommodating portion 34, the conductive member 33 is provided with a fifth hole 33a, and the power-off device 3 also includes a second fastener 42, which is passed through the fifth hole 33a, the fourth hole 31a and the third hole 39b.

[0110] In the above technical solution, the adapter 39 can play the role of fixing the conductive member 33, and improve the installation reliability and stability of the conductive member 33 on the insulating base 31. The lead-out portion 323 is fixed to the adapter 39 by the first fastener 41, the first hole 323a and the second hole 39a. The fixing method is relatively simple and the fixing effect is relatively good. The conductive member 33 can be disassembled on the insulating base 31, which is convenient for the maintenance or replacement of the conductive member 33.

[0111] In some embodiments of the present application, Figure 5 As shown, the conductive member 33 is arranged at one end of the insulating base 31 away from the opening 34a, and the lead-out portion 323 is arranged near the opening 34a of the breakable member 32. In this technical solution, the distance between the conductive member 33 and the lead-out portion 323 is relatively far, and they are electrically connected through the adapter 39. Since the breakable member 32 is located in the first accommodating portion 34, the conductive member 33 and the lead-out portion 323 are not too close, which is conducive to improving the stability and reliability of the breakable member 32 in the first accommodating portion 34.

[0112] In some embodiments of the present application, Figure 3 and Figure 6 As shown, the circuit breaker 32 has a width direction, in which the width of the lead-out portion 323 is smaller than the width of the circuit breaker 32, the first accommodating portion 34 includes a first space 341 and a second space 342 that are connected to each other, in which the width of the second space 342 is smaller than the width of the first space 341, the circuit breaker 32 is arranged in the first space 341, and the lead-out portion 323 is arranged in the second space 342.

[0113] like Figure 3 As shown, the width direction may refer to the direction in which the size of the circuit breaker 32 is smaller, for example, Figure 3 The two lead-out portions 323 may be located on both sides of the length direction of the disconnectable circuit breaker 32, and the length direction may refer to Figure 3 The lead-out portion 323 is a part of the circuit breaker 32 that is in electrical contact with the conductive member 33. The width of the lead-out portion 323 is smaller than the width of the circuit breaker 32, which can reduce materials and save space, and is conducive to reducing the space of the first accommodating portion 34 and the volume of the insulating base 31.

[0114] In the first accommodating portion 34, the first space 341 can accommodate the circuit-breaking component 32 and limit the circuit-breaking component 32. The second space 342 can accommodate the lead-out portion 323 and limit the lead-out portion 323. By limiting the circuit-breaking component 32 and the lead-out portion 323 respectively, the circuit-breaking component 32 and the lead-out portion 323 can be effectively prevented from loosening, thereby improving the installation reliability and stability of the circuit-breaking component 32 and the lead-out portion 323. On the other hand, the first space 341 is adapted to the circuit-breaking component 32, and the second space 342 is adapted to the lead-out portion 323, so that the volume of the first accommodating portion 34 can be reduced. If the first accommodating portion 34 is a limit plate protruding from the insulating base 31, materials can be saved. If the first accommodating portion 34 is provided with a groove on the insulating base 31, the size of the groove can be reduced, which is beneficial to improving the strength of the insulating base 31 and extending the service life of the insulating base 31.

[0115] 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 be adapted to fit, and the second space 342 and the lead-out portion 323 can be adapted to fit, which is beneficial to reducing the volume of the insulating base 31.

[0116] In some embodiments of the present application, Figure 5 As shown, the first accommodating portion 34 has a setting wall 343 therein, 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 disconnectable component 32, and the second connector 324 is plugged into and matched with the first connector 3431.

[0117] 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 arranged 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.

[0118] 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 arranged 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 arranged 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, and the cover plate 36 passes through the fixing plate 4 and is fixed to the insulating base 31 by locking bolts.

[0119] In a second aspect, an embodiment of the present application further provides a battery 100 including a power-off device 3 .

[0120] 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 .

[0121] The electrical device may be a vehicle 1000, which includes a battery 100. The battery 100 is integrated on 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, two functions are integrated into one component, which can save space and meet the space requirement provided by the energy compartment of the vehicle 1000.

[0122] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0123] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power-off device, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 disconnecting device according to any one of claims 4 to 6, characterized in that: 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, characterized in that: 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, characterized in that: 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 cutoff device according to claim 6 or 9, characterized in that: 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, characterized in that: 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 cutoff device according to claim 11, characterized in that: 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 cutoff device according to claim 12, characterized in that: 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 cutoff device according to claim 12, characterized in that: 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 cutoff device according to claim 11, characterized in that: 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 cutoff device according to claim 3, characterized in that: 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, characterized in that: Comprising a power disconnecting device as claimed in any one of claims 1 to 16.

18. An electrical device, characterized in that: 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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