Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer assembly, an end plate and a potential assembly, the box body comprises a first wall. The battery monomer assembly is accommodated in the box body and is arranged on the first wall, and the battery monomer assembly comprises a plurality of battery monomers which are stacked along the first direction; the end plate is arranged at the end part of the battery monomer assembly along the first direction, and the end plate is in insulated connection with the first wall. One end of the potential assembly is connected with the end plate, the other end is connected with the first wall, and the potential assembly is configured to equipotentially connect the end plate and the first wall in a first state; in the second state, the non-equipotential connects the end plate and the first wall. According to the technical scheme, the reliability of the battery device can be improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, how to improve the reliability of battery devices is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a battery device. The battery device includes a case, a battery cell assembly, an end plate, and a potential assembly. The case includes a first wall. The battery cell assembly is accommodated in the case and arranged on the first wall, and the battery cell assembly includes a plurality of battery cells stacked along a first direction. Along the first direction, the end plate is arranged at the end of the battery cell assembly, and the end plate is insulated and connected to the first wall. One end of the potential assembly is connected to the end plate, and the other end is connected to the first wall. The potential assembly is configured to connect the end plate and the first wall at an equipotential in a first state; and to connect the end plate and the first wall at a non-equipotential in a second state.

[0007] The technical solution of the embodiment of the present application realizes equipotential connection between the end plate and the first wall through a potential component, thereby reducing the risk of electrical breakdown of the battery device during use. At the same time, the potential component can realize non-equipotential connection between the end plate and the first wall, thereby reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0008] In some embodiments, the potential assembly includes a protective member, two ends of which are respectively connected to the end plate and the first wall at the same potential, and the protective member can be disconnected to make the potential assembly non-equipotentially connected to the end plate and the first wall.

[0009] The technical solution of the embodiment of the present application realizes equipotential connection between the end plate and the first wall through the protective member, thereby reducing the risk of electrical breakdown of the battery device during use. At the same time, the protective member can realize non-equipotential connection between the end plate and the first wall, thereby reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0010] In some embodiments, the protection element is a fuse.

[0011] The technical solution of the embodiment of the present application realizes equipotential connection and non-equipotential connection between the end plate and the first wall through a fuse, thereby improving the reliability of the battery device. The use of a fuse makes the structure of the battery device simple, the cost is low, and it is easy to maintain.

[0012] In some embodiments, the battery device further comprises a detection member and a control member, wherein the detection member is used to detect at least one of the voltage of the end plate, the smoke in the box body, and the temperature in the box body. The detection member and the potential assembly are respectively connected to the control member signal, and the control member is used to receive and process the detection signal of the detection member, and the control member is used to control the protection member to disconnect.

[0013] The technical solution of the embodiment of the present application detects the condition of the battery device through a detection component, and controls the protection component to disconnect according to the detection signal of the detection component through a control component, thereby reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0014] In some embodiments, the detection element is at least one of a voltage sensor, a smoke sensor, and a temperature sensor.

[0015] According to the technical solution of the embodiment of the present application, the detection element is at least one of a voltage sensor, a smoke sensor and a temperature sensor, which is used to detect the condition of the battery device, reduce the risk of insulation failure of the battery device, and improve the reliability of the battery device.

[0016] In some embodiments, the box body further includes a mounting beam, which is disposed between the end plate and the first wall along a thickness direction of the first wall, and the end plate is insulated and connected to the mounting beam.

[0017] According to the technical solution of the embodiment of the present application, the end plate is insulated and connected to the mounting beam, thereby reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0018] In some embodiments, the end plate is provided with a first mounting hole, the mounting beam is provided with a second mounting hole corresponding to the first mounting hole, and the battery device includes a connecting member, which is passed through the first mounting hole and the second mounting hole to connect the end plate with the mounting beam.

[0019] In some embodiments, the connecting member is made of insulating material.

[0020] According to the technical solution of the embodiment of the present application, the material of the connecting member is selected as an insulating material, so as to realize an insulated connection between the connecting member and the first mounting hole and the second mounting hole, thereby realizing an insulated connection between the end plate and the first wall, reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0021] The technical solution of the embodiment of the present application improves the reliability of the connection between the end plate and the mounting beam by penetrating the first mounting hole and the second mounting hole through the connecting member, and facilitates operation.

[0022] In some embodiments, the battery device further includes a first insulating member, at least a portion of which is located inside the end plate and between the connecting member and the hole wall of the first mounting hole, so that the connecting member is insulated and connected to the hole wall of the first mounting hole.

[0023] The technical solution of the embodiment of the present application is to set the first insulating member inside the end plate and between the connecting member and the hole wall of the first mounting hole, so as to achieve an insulated connection between the connecting member and the first mounting hole, reduce the risk of insulation failure of the battery device, and improve the reliability of the battery device.

[0024] In some embodiments, the first insulating member is made of at least one of quartz or alumina ceramic.

[0025] In the technical solution of the embodiment of the present application, quartz or alumina ceramics have good insulation performance and hardness, and the end plate will be affected by the expansion force of the battery cell assembly, so that the first insulating member is affected by the expansion force. The material of the first insulating member is quartz or alumina ceramics, which reduces the risk of insulation failure of the battery device and the risk of damage to the first insulating member.

[0026] In some embodiments, the battery device further includes a second insulating member, at least a portion of which is located inside the mounting beam and between the connecting member and a hole wall of the second mounting hole.

[0027] The technical solution of the embodiment of the present application is to set the second insulating member inside the mounting beam and between the connecting member and the hole wall of the second mounting hole, so as to achieve an insulated connection between the connecting member and the second mounting hole, reduce the risk of insulation failure of the battery device, and improve the reliability of the battery device.

[0028] In some embodiments, the second insulating member is made of at least one of quartz and alumina ceramic.

[0029] In the technical solution of the embodiment of the present application, quartz or alumina ceramics have good insulation performance and hardness, and because the mounting beam is subject to the expansion force of the battery cell assembly, the second insulating member is affected by the expansion force. The material of the second insulating member is quartz or alumina ceramics, which reduces the risk of insulation failure of the battery device and reduces the risk of damage to the first insulating member.

[0030] In some embodiments, the battery device further includes a third insulating member disposed between the end plate and the mounting beam along a thickness direction of the first wall.

[0031] According to the technical solution of the embodiment of the present application, the end plate is separated from the mounting beam by a third insulating member in the thickness direction of the first wall, thereby reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0032] In some embodiments, the third insulating member is made of at least one of a resin material, foam, and silicone rubber.

[0033] In the technical solution of the embodiment of the present application, resin materials, foams, and silicone rubber have good insulation performance and low hardness. The material of the third insulating member is selected from resin materials, foams, or silicone rubber to reduce the risk of insulation failure of the battery device and the risk of the third insulating member damaging the end plate or the mounting beam.

[0034] In some embodiments, there are two end plates, the two end plates are spaced apart along the first direction, and the plurality of battery cells are disposed between the two end plates. The battery device further comprises a binding member, which cooperates with the end plates to clamp the plurality of battery cells.

[0035] The technical solution of the embodiment of the present application clamps the battery cell assembly by means of a binding member and two end plates, which has a better effect of resisting the expansion force of the battery cell assembly and improves the reliability of the battery device.

[0036] In some embodiments, at least one binding member is made of metal, and the potential assembly is electrically connected to the end plate through the binding member.

[0037] According to the technical solution of the embodiment of the present application, the potential assembly is electrically connected to the end plate through a binding member, thereby achieving equipotential connection between the end plate and the first wall, reducing the risk of electrical breakdown of the battery device during use. At the same time, the potential assembly can achieve non-equipotential connection between the end plate and the first wall, reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0038] In a second aspect, the present application further provides an electrical device, comprising a battery device according to any one of the embodiments in the first aspect, wherein the battery device is used to provide electrical energy to the electrical device.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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.

[0041] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0042] Figure 2 An exploded view of a battery device provided in some embodiments of the present application;

[0043] Figure 3 A schematic diagram of the internal structure of a battery device provided in some embodiments of the present application;

[0044] Figure 4 A schematic diagram of the connection between the end plate and the mounting beam provided in some embodiments of the present application;

[0045] Figure 5 Schematic diagram of the connection between the end plate and the mounting beam provided in some other embodiments of the present application.

[0046] Icons: 1-battery device; 10-box; 11-first wall; 12-first sub-box; 13-second sub-box; 20-battery cell assembly; 21-battery cell; 30-end plate; 31-first mounting hole; 32-binding piece; 40-potential assembly; 41-protective piece; 50-detection piece; 60-control piece; 70-mounting beam; 71-second mounting hole; 80-connecting piece; 90-first insulating piece; 91-second insulating piece; 92-third insulating piece; 100-vehicle; 110-controller; 120-motor; X-first direction; Y-thickness direction of the first wall. DETAILED DESCRIPTION

[0047] 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 and completely 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.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning 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.

[0049] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0050] 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.

[0051] The term "and / or" in this application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or the second direction can represent: A exists alone, A and the second direction exist at the same time, and the second direction exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0052] The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0053] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0054] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0055] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0056] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0057] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0058] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0059] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0060] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0061] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0062] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0063] The battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.

[0064] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, as environmental conditions and / or internal conditions of the battery change, the reliability of the battery device is also one of the key factors to consider.

[0065] At present, the battery cell assembly is arranged in a box to form a battery device, and the end plate is arranged at one end of the battery cell assembly and connected to the wall of the box to resist expansion force. During the use of the battery device, in order to reduce the risk of electrical breakdown between the two metal parts (end plate and box) under high voltage, the end plate and the wall of the box are connected with equipotential connection.

[0066] However, in the event of certain battery device failures, such as thermal runaway causing electrolyte leakage, battery case seal failure causing liquid to enter the case, cooling system seal failure causing cooling medium leakage, etc., it is easy to cause the creepage distance between the busbar and the end plate to shorten, resulting in a shortened creepage distance between the busbar and the wall of the case, leading to insulation failure of the battery device and a short circuit, thereby affecting the reliability of the battery device.

[0067] Based on the above considerations, in order to reduce the problem of insulation failure of the battery device, thereby affecting the reliability of the battery device, an embodiment of the present application provides a battery device. The battery device includes a case, a battery cell assembly, an end plate and a potential assembly. The case includes a first wall. The battery cell assembly is accommodated in the case and is arranged on the first wall. The battery cell assembly includes a plurality of battery cells stacked along a first direction. Along the first direction, the end plate is arranged at the end of the battery cell assembly, and the end plate is insulated and connected to the first wall. One end of the potential assembly is connected to the end plate, and the other end is connected to the first wall. The potential assembly is configured to connect the end plate and the first wall at the same potential in the first state; in the second state, the end plate and the first wall are connected at a non-equipotential.

[0068] The potential assembly is used to achieve equipotential connection and non-equipotential connection between the end plate and the first wall, thereby reducing the risk of insulation failure of the battery device and improving the reliability of the battery device.

[0069] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0070] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0071] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle 100 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 device 1 is provided inside the vehicle 100, and the battery device 1 may be provided at the bottom, head or tail of the vehicle 100. The battery device 1 may be used to power the vehicle 100. For example, the battery device 1 may be used as an operating power source for the vehicle 100, for the circuit system of the vehicle 100, such as for the working power requirements during the startup, navigation and operation of the vehicle 100.

[0072] The vehicle 100 may further include a controller 110 and a motor 120 , wherein the controller 110 is used to control the battery device 1 to supply power to the motor 120 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 100 .

[0073] In some embodiments of the present application, the battery device 1 can not only serve as an operating power source for the vehicle 100 , but also serve as a driving power source for the vehicle 100 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100 .

[0074] The battery device includes a battery cell assembly and a power management system. The battery management system is connected to the battery cell assembly and is used to manage the charging and discharging of the battery cell assembly.

[0075] Please refer to Figure 2 , Figure 2 An exploded view of a battery device provided in some embodiments of the present application. The battery device 1 may further include a case 10, in which a battery cell assembly 20 is accommodated. The case 10 is used to provide a storage space for the battery cell assembly 20, and the case 10 may adopt a variety of structures. In some embodiments, the case 10 may include a first sub-case 12 and a second sub-case 13, the first sub-case 12 and the second sub-case 13 cover each other, and the first sub-case 12 and the second sub-case 13 jointly define a storage space for accommodating the battery cell assembly 20. The first sub-case 12 may be a hollow structure with one end open, and the second sub-case 13 may be a plate-like structure, and the second sub-case 13 covers the open side of the first sub-case 12, so that the first sub-case 12 and the second sub-case 13 jointly define a storage space; the first sub-case 12 and the second sub-case 13 may also be hollow structures with one side open, and the open side of the first sub-case 12 covers the open side of the second sub-case 13.

[0076] In the battery device 1, there may be multiple battery cell assemblies 20, and the multiple battery cell assemblies 20 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cell assemblies 20 are both connected in series and in parallel. The multiple battery cell assemblies 20 may be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cell assemblies 20 is accommodated in the box 10; of course, the battery device 1 may also be a battery module formed by connecting multiple battery cell assemblies 20 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 10. The battery device 1 may also include other structures, for example, the battery device 1 may also include a busbar component for realizing electrical connection between the multiple battery cell assemblies 20.

[0077] The battery cell assembly 20 may include a plurality of battery cells, and the battery cells may be secondary batteries or primary batteries; the battery cells may also be lithium-sulfur batteries, sodium-ion batteries or magnesium-ion batteries, but are not limited thereto.

[0078] Please refer to Figure 3 , Figure 3 Schematic diagram of the internal structure of a battery device provided in some embodiments of the present application. In order to facilitate the display of the structure of the end plate and the potential assembly, Figure 3 Part of the wall of the box is hidden in it. An embodiment of the present application provides a battery device 1. The battery device 1 includes a box 10, a battery cell assembly 20, an end plate 30 and a potential assembly 40. The box 10 includes a first wall 11. The battery cell assembly 20 is accommodated in the box 10 and is arranged on the first wall 11. The battery cell assembly 20 includes a plurality of battery cells 21 stacked along a first direction X. Along the first direction X, the end plate 30 is arranged at the end of the battery cell assembly 20, and the end plate 30 is insulated and connected to the first wall 11. One end of the potential assembly 40 is connected to the end plate 30, and the other end is connected to the first wall 11. The potential assembly 40 is configured to connect the end plate 30 and the first wall 11 with equal potential in the first state; and to connect the end plate 30 and the first wall 11 with non-equipotential in the second state.

[0079] In some embodiments, the first wall 11 may be a bottom wall of the box body 10 . When the battery device 1 is installed on the vehicle 100 , the first wall 11 is a wall below the box body 10 .

[0080] In some embodiments, the first direction X may be represented by a direction indicated by a letter X in the figure.

[0081] In some embodiments, the end plate 30 and the first wall 11 may both be made of metal.

[0082] In some embodiments, the end cap may be disposed at one end of the battery cell assembly 20 in the first direction X, and the end of the end cap facing the first wall 11 is insulated and connected to the first wall 11. The end cap and the first wall 11 may be insulated and connected by separating the end cap and the first wall 11 through an insulating material.

[0083] In some embodiments, the first state may be a state in which the battery device 1 is in normal use, and the potential assembly 40 connects the end plate 30 and the first wall 11 to achieve equipotential connection between the end plate 30 and the first wall 11. The equipotential connection here refers to connecting the end plate 30 and the first wall 11 in an electrically connected manner.

[0084] In some embodiments, the second state may be a state in which the battery device 1 fails in some cases. The second state may be that the electrolyte leaks from the battery cell 21 during thermal runaway, causing the electrolyte to electrically connect the conduit component to the end plate 30. Alternatively, the second state may be that the seal of the battery case 10 fails, causing the external liquid medium to enter the case 10, causing the liquid medium to electrically connect the conduit component to the end plate 30. Alternatively, the second state may be that the seal of the cooling system in the battery case 10 fails, causing the cooling medium to leak, causing the cooling medium to electrically connect the conduit component to the end plate 30. The second state may be any of the above cases or other cases that cause the conduit component to be electrically connected to the end plate 30.

[0085] In the second state, the current collecting component can be electrically connected to the end plate 30, so there is a risk that the current collecting component is connected to the first wall 11 at the same potential. Therefore, in the second state, the potential assembly 40 connects the end plate 30 and the first wall 11 at a non-equipotential connection, so that the current collecting component is connected to the first wall 11 at a non-equipotential connection, reducing the risk of the current of the current collecting component flowing to the first wall 11.

[0086] In some embodiments, the potential assembly 40 can switch from equipotential connection to non-equipotential connection through a fuse. In the first state, the potential assembly 40 equipotentially connects the end plate 30 and the first wall 11. In the second state, since the converging component is electrically connected to the end plate 30, the current passes through the fuse, and the fuse melts when the current rises to a set value, thereby cutting off the current.

[0087] In some embodiments, the potential assembly 40 can switch from equipotential connection to non-equipotential connection through a circuit valve. In the first state, the circuit valve can be opened, and the potential assembly 40 connects the end plate 30 and the first wall 11 to equipotential connection. In the second state, since the converging component is electrically connected to the end plate 30, the circuit valve can be closed to cut off the current.

[0088] The technical solution of the embodiment of the present application realizes equipotential connection between the end plate 30 and the first wall 11 through the potential component 40, thereby reducing the risk of electrical breakdown of the battery device 1 during use. At the same time, the potential component 40 can realize non-equipotential connection between the end plate 30 and the first wall 11, thereby reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1.

[0089] Please refer to Figure 3 In some embodiments, the potential assembly 40 includes a protective member 41, both ends of which are connected to the end plate 30 and the first wall 11 at the same potential, and the protective member 41 can be disconnected to make the potential assembly 40 non-equipotentially connected to the end plate 30 and the first wall 11.

[0090] In some embodiments, in the first state, the protection member 41 connects the end plate 30 and the first wall 11 at the same potential. In the second state, the collector is electrically connected to the end plate 30 and the protection member 41 is disconnected, so that the return assembly is connected to the first wall 11 at a non-equipotential connection.

[0091] In some embodiments, the protection member 41 may be a fuse, a circuit valve, etc.

[0092] The technical solution of the embodiment of the present application realizes the equipotential connection between the end plate 30 and the first wall 11 through the protective member 41, thereby reducing the risk of electrical breakdown of the battery device 1 during use. At the same time, the protective member 41 can realize the non-equipotential connection between the end plate 30 and the first wall 11, thereby reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1.

[0093] In some embodiments, the protection element 41 is a fuse.

[0094] A fuse is also called a current fuse. A fuse is a fuse that is mainly used for overload protection. When the current abnormally rises to a certain height and temperature, the fuse will melt and cut off the current to protect the safe operation of the circuit.

[0095] In some embodiments, in the first state, the fuse realizes the equipotential connection between the end plate 30 and the first wall 11. In the second state, the fuse is blown, and the non-equipotential connection between the end plate 30 and the first wall 11 is realized.

[0096] The technical solution of the embodiment of the present application realizes equipotential connection and non-equipotential connection between the end plate 30 and the first wall 11 through a fuse, thereby improving the reliability of the battery device 1. The use of a fuse makes the battery device 1 simple in structure, low in cost, and easy to maintain.

[0097] Please refer to Figure 3 In some embodiments, the battery device 1 further includes a detection member 50 and a control member 60. The detection member 50 is used to detect at least one of the voltage of the end plate 30, the smoke in the box body 10, and the temperature in the box body 10. The detection member 50 and the potential assembly 40 are respectively connected to the control member 60 by signal. The control member 60 is used to receive and process the detection signal of the detection member 50, and the control member 60 is used to control the protection member 41 to disconnect.

[0098] In some embodiments, the detection member 50 can detect the voltage or current of the end plate 30. When the detection member 50 detects that there is no voltage on the end plate 30, the detection member 50 may not send a signal to the control member 60, or after the detection member 50 sends a signal to the control member 60, the control member 60 does not issue an instruction.

[0099] When the detection element 50 detects that there is voltage on the end plate 30 , the detection element 50 transmits a detection signal to the control element 60 , and the control element 60 controls the protection element 41 to disconnect.

[0100] In some embodiments, the detection element 50 can detect the smoke condition in the box 10. In thermal runaway, the temperature is usually high, and the leaked electrolyte will leak in the form of liquid or gas. The detection element 50 detects the smoke condition in the box 10, that is, detects whether thermal runaway occurs.

[0101] When the detection component 50 detects that there is no smoke in the box body 10, the detection component 50 may not send a signal to the control component 60, or after the detection component 50 sends a signal to the control component 60, the control component 60 does not issue an instruction.

[0102] When the detection element 50 detects smoke in the box body 10 , the detection element 50 transmits a detection signal to the control element 60 , and the control element 60 controls the protection element 41 to disconnect.

[0103] In some embodiments, the detection element 50 can detect the temperature inside the housing 10. During thermal runaway, the temperature is usually high and significantly different from the normal temperature of the battery device 1. The detection element 50 detects the temperature inside the housing 10, that is, detects whether thermal runaway occurs.

[0104] When the detection component 50 detects that the temperature in the box body 10 is within a normal range, the detection component 50 may not send a signal to the control component 60, or after the detection component 50 sends a signal to the control component 60, the control component 60 does not issue an instruction.

[0105] When the detection component 50 detects that the temperature in the box body 10 is abnormal, the detection component 50 transmits a detection signal to the control component 60, and the control component 60 controls the protection component 41 to be disconnected.

[0106] In some embodiments, the detection member 50 can detect one of the voltage of the end plate 30 , the smoke in the box 10 , and the temperature in the box 10 , or two of them, or three of them.

[0107] In some embodiments, the detection element 50 may be a plurality of different detection elements 50 for different detection conditions. Each detection element 50 may be provided separately, or a plurality of detection elements 50 may be integrated into one.

[0108] In some embodiments, the control unit 60 can be a processor of a computer, a host, etc.

[0109] In some embodiments, the control unit 60 may be integrated into a battery management system.

[0110] In some embodiments, the control component 60 can be signal-connected to the detection component 50 and the potential component 40 respectively, and the connection method can be cable connection, WiFi connection, Bluetooth connection, etc.

[0111] In some embodiments, the protective member 41 is taken as a fuse. When the detection member 50 detects that there is voltage or current in the end plate 30, or smoke appears in the box 10, or the temperature in the box 10 rises to an abnormal threshold, the detection member 50 transmits a detection signal to the control member 60, and the control member 60 receives the signal and issues an instruction to the potential component 40. The potential component 40 may include a power supply device, and the power supply device outputs a current to blow the fuse.

[0112] In some embodiments, taking thermal runaway as an example, the detection element 50 can detect an abnormality of the battery device 1 in the initial state of thermal runaway, thereby quickly connecting the end plate 30 and the first wall 11 to non-equipotential connection.

[0113] The technical solution of the embodiment of the present application detects the condition of the battery device 1 through the detection component 50, and controls the protection component 41 to be disconnected according to the detection signal of the detection component 50 through the control component 60, thereby reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1.

[0114] In some embodiments, the detection element 50 is at least one of a voltage sensor, a smoke sensor, and a temperature sensor.

[0115] In some embodiments, when the detection member 50 is used to detect the voltage of the end plate 30 , the detection member 50 may be a voltage sensor.

[0116] When the detection member 50 is used to detect smoke in the box 10 , the detection member 50 may be a smoke sensor.

[0117] When the detection member 50 is used to detect the temperature in the box body 10, the detection member 50 may be a temperature sensor.

[0118] In the technical solution of the embodiment of the present application, the detection element 50 is at least one of a voltage sensor, a smoke sensor and a temperature sensor, which is used to detect the condition of the battery device 1, reduce the risk of insulation failure of the battery device 1, and improve the reliability of the battery device 1.

[0119] Please refer to Figures 3 to 5 , Figure 4 A schematic diagram of the connection between the end plate and the mounting beam provided in some embodiments of the present application, Figure 5 Schematic diagram of the connection between the end plate and the mounting beam provided in some other embodiments of the present application. In order to facilitate the display of the schematic diagram of the connection between the end plate and the mounting beam, Figure 4 and Figure 5In some embodiments, the box 10 further includes a mounting beam 70, which is disposed between the end plate 30 and the first wall 11 along the thickness direction Y of the first wall, and the end plate 30 is insulated from the mounting beam 70.

[0120] In some embodiments, the mounting beam 70 may contact one end of the battery cell assembly 20 in the first direction X.

[0121] In some embodiments, the thickness direction Y of the first wall may be represented by the direction indicated by the letter Y in the figure.

[0122] In some embodiments, the thickness direction Y of the first wall may be perpendicular to the first direction X.

[0123] In some embodiments, the thickness direction Y of the first wall may be the height direction of the battery device 1 , and the first direction X may be the length direction of the battery device 1 .

[0124] In some embodiments, in the thickness direction Y of the first wall, the first wall 11 has a first surface, the first surface is a surface facing the end plate 30, and the first surface is in contact with the battery cell assembly 20. The mounting beam 70 is disposed on the first surface, one end of the mounting beam 70 is connected to the first wall 11, and the other end is connected to the end plate 30.

[0125] In some embodiments, the end plate 30 is insulated from the mounting beam 70 , thereby achieving an insulated connection between the end plate 30 and the first wall 11 .

[0126] In some embodiments, the insulated connection between the end plate 30 and the mounting beam 70 may be achieved by providing an insulating material between the end plate 30 and the mounting beam 70 to separate the end plate 30 from the mounting beam 70 .

[0127] According to the technical solution of the embodiment of the present application, the end plate 30 is insulated from the mounting beam 70 , thereby reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1 .

[0128] Please refer to Figures 4 to 5 , wherein, in order to facilitate the display of the first mounting hole, Figure 5 In some embodiments, the end plate 30 is provided with a first mounting hole 31, the mounting beam 70 is provided with a second mounting hole 71 corresponding to the first mounting hole 31, and the battery device 1 includes a connector 80, which is passed through the first mounting hole 31 and the second mounting hole 71 to connect the end plate 30 with the mounting beam 70.

[0129] In some embodiments, the end plate 30 is provided with a first mounting hole 31 , and the first mounting hole 31 may penetrate two end surfaces of the end plate 30 along the thickness direction Y of the first wall.

[0130] In some embodiments, in the thickness direction Y of the first wall, the end surface of the mounting beam 70 facing the end plate 30 may be provided with a second mounting hole 71 .

[0131] In some embodiments, the connecting member 80 may be a bolt. The inner wall of the first mounting hole 31 and the inner wall of the second mounting hole 71 may both be provided with threads that cooperate with the bolt.

[0132] In some embodiments, the connecting member 80 can be inserted into the first mounting hole 31 from the end surface of the end plate 30 facing away from the mounting beam 70, and pass out from the end surface of the end plate 30 facing the mounting beam 70. The end of the connecting member 80 that passes through can be set in the second mounting hole 71, thereby connecting the end plate 30 and the mounting beam 70.

[0133] The technical solution of the embodiment of the present application improves the reliability of the connection between the end plate 30 and the mounting beam 70 by penetrating the first mounting hole 31 and the second mounting hole 71 through the connecting member 80, and facilitates operation.

[0134] In some embodiments, the connecting member 80 is made of insulating material.

[0135] In some embodiments, the material of the connector 80 may be a polymer insulating material such as a resin material, foam, silicone rubber, or an insulating material among inorganic metal materials such as quartz or alumina ceramics.

[0136] When the connector 80 connects the end plate 30 and the mounting beam 70, it will be affected by the expansion force of the battery cell assembly 20. In some embodiments, the connector 80 may be made of quartz or alumina ceramics. Quartz and alumina ceramics have good insulation properties and high hardness, which reduces the risk of damage to the connector 80.

[0137] According to the technical solution of the embodiment of the present application, the material of the connector 80 is selected to be an insulating material, so as to achieve an insulated connection between the connector and the first mounting hole 31 and the second mounting hole 71, thereby achieving an insulated connection between the end plate 30 and the first wall 11, reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1.

[0138] Please refer to Figures 4 to 5 In some embodiments, the battery device 1 further includes a first insulating member 90, at least a portion of which is located inside the end plate 30 and between the connector 80 and the hole wall of the first mounting hole 31, so that the connector 80 is insulated and connected to the hole wall of the first mounting hole 31.

[0139] In some embodiments, the first insulating member 90 may be made of resin, foam, silicone, rubber, etc.

[0140] In some embodiments, the first insulating member 90 is sleeved on the outer circumference of the connector 80. When the end plate 30 resists the expansion force of the battery cell assembly 20, the connector 80 may be affected by the expansion force, so that the first insulating member 90 is also affected by the expansion force. Therefore, the first insulating member 90 can be made of a material with higher hardness, for example, the material of the first insulating member 90 can be quartz, alumina ceramics, etc.

[0141] In some embodiments, all parts of the first insulating member 90 may be disposed inside the end plate 30 , and in the thickness direction Y of the first wall, the size of the first insulating member 90 may be the same as the size of the first mounting hole 31 .

[0142] In some embodiments, a portion of the first insulating member 90 may be disposed inside the end plate 30, and in the thickness direction Y of the first wall, the first insulating member 90 passes through the two end surfaces of the end plate 30. Another portion of the first insulating member 90 may pass through the end surface of the end plate 30 that faces away from the mounting beam 70. Another portion of the first insulating member 90 may also pass through the end surface of the end plate 30 that faces the mounting beam 70.

[0143] In some embodiments, the first insulating member 90 may be disposed by connecting to the inner wall of the first mounting hole 31 and then passing the connecting member 80 through the first mounting hole 31 .

[0144] In some embodiments, the first insulating member 90 may be disposed in such a manner that the first insulating member 90 is connected to the connecting member 80 , and then the connecting member 80 and the first insulating member 90 are passed through the first mounting hole 31 .

[0145] In some embodiments, the connector 80 may be made of metal. The first insulating member 90 insulates the connector 80 from the end plate 30 , thereby reducing the risk of the end plate 30 and the mounting beam 70 being connected to the same potential when the connector 80 connects the end plate 30 and the mounting beam 70 .

[0146] According to the technical solution of the embodiment of the present application, the first insulating member 90 is arranged inside the end plate 30 and between the connecting member 80 and the hole wall of the first mounting hole 31, so as to realize the insulating connection between the connecting member 80 and the first mounting hole 31, reduce the risk of insulation failure of the battery device 1, and improve the reliability of the battery device 1.

[0147] In some embodiments, the first insulating member 90 is made of at least one of quartz and alumina ceramic.

[0148] In some embodiments, there may be a plurality of connectors 80 , and correspondingly, there may also be a plurality of first insulating members 90 , which is the same as the number of connectors 80 .

[0149] The material of the multiple first insulating members 90 may be the same, for example, the material of the multiple first insulating members 90 may all be quartz, or the material of the multiple first insulating members 90 may all be alumina ceramic.

[0150] Alternatively, the materials of the plurality of first insulating members 90 may be different. For example, a portion of the first insulating members 90 may be made of quartz, and another portion of the first insulating members 90 may be made of alumina ceramic.

[0151] In some embodiments, the first insulating member 90 may also be made of other inorganic non-metallic materials having insulating properties and high strength.

[0152] In the technical solution of the embodiment of the present application, quartz or alumina ceramics have good insulation performance and hardness, and since the end plate 30 is affected by the expansion force of the battery cell assembly 20, the first insulating member 90 is affected by the expansion force. The material of the first insulating member 90 is quartz or alumina ceramics, which reduces the risk of insulation failure of the battery device 1 and the risk of damage to the first insulating member 90.

[0153] Please refer to Figures 4 to 5 In some embodiments, the battery device 1 further includes a second insulating member 91 , at least a portion of which is located inside the mounting beam 70 and between the connecting member 80 and a hole wall of the second mounting hole 71 .

[0154] In some embodiments, the second insulating member 91 may be made of resin, foam, silicone, rubber, etc.

[0155] In some embodiments, the second insulating member 91 is sleeved on the outer circumference of the connecting member 80. When the mounting beam 70 resists the expansion force of the battery cell assembly 20, the connecting member 80 may be affected by the expansion force, so that the second insulating member 91 is also affected by the expansion force. Therefore, the second insulating member 91 can be made of a material with higher hardness, for example, the material of the second insulating member 91 can be quartz, alumina ceramics, etc.

[0156] In some embodiments, all portions of the second insulating member 91 may be disposed inside the mounting beam 70 , and in the thickness direction Y of the first wall, the size of the second insulating member 91 may be the same as the size of the second mounting hole 71 .

[0157] In some embodiments, a portion of the second insulating member 91 may be disposed inside the mounting beam 70. Another portion of the first insulating member 90 may pass through the end surface of the end plate 30 facing away from the mounting beam 70. Another portion of the first insulating member 90 may also pass through the end surface of the mounting beam 70 facing the end plate 30.

[0158] In some embodiments, the second insulating member 91 may be disposed by connecting to the inner wall of the second mounting hole 71 and then passing the connecting member 80 through the second mounting hole 71 .

[0159] In some embodiments, the second insulating member 91 may be disposed by connecting the second insulating member 91 to the connecting member 80 , and then passing the connecting member 80 and the second insulating member 91 through the second mounting hole 71 .

[0160] In some embodiments, the connector 80 may be made of metal. The second insulating member 91 insulates the connector 80 from the mounting beam 70 , thereby reducing the risk of the end plate 30 and the mounting beam 70 being connected to the same potential when the connector 80 connects the end plate 30 and the mounting beam 70 .

[0161] According to the technical solution of the embodiment of the present application, the second insulating member 91 is arranged inside the mounting beam 70 and between the connecting member 80 and the hole wall of the second mounting hole 71, so as to realize the insulating connection between the connecting member 80 and the second mounting hole 71, reduce the risk of insulation failure of the battery device 1, and improve the reliability of the battery device 1.

[0162] In some embodiments, the second insulating member 91 is made of at least one of quartz and alumina ceramic.

[0163] In some embodiments, there may be a plurality of connectors 80 , and correspondingly, there may also be a plurality of second insulating members 91 , which is the same as the number of connectors 80 .

[0164] The material of the plurality of second insulating members 91 may be the same, for example, the material of the plurality of second insulating members 91 may all be quartz, or the material of the plurality of second insulating members 91 may all be alumina ceramic.

[0165] Alternatively, the materials of the plurality of second insulating members 91 may be different. For example, a portion of the second insulating members 91 may be made of quartz, and another portion of the second insulating members 91 may be made of alumina ceramic.

[0166] In some embodiments, the second insulating member 91 may also be made of other inorganic non-metallic materials having insulating properties and high strength.

[0167] In the technical solution of the embodiment of the present application, quartz or alumina ceramics have good insulation performance and hardness, and since the end plate 30 is affected by the expansion force of the battery cell assembly 20, the first insulating member 90 is affected by the expansion force. The material of the second insulating member 91 is quartz or alumina ceramics, which reduces the risk of insulation failure of the battery device 1 and reduces the risk of damage to the first insulating member 90.

[0168] Please refer to Figures 4 to 5In some embodiments, the battery device 1 further includes a third insulating member 92 , and the third insulating member 92 is disposed between the end plate 30 and the mounting beam 70 along the thickness direction Y of the first wall.

[0169] In some embodiments, in the thickness direction Y of the first wall, the third insulating member 92 is disposed between the end plate 30 and the mounting beam 70 , that is, in the thickness direction Y of the first wall, the end plate 30 and the mounting beam 70 are not in direct contact.

[0170] In some embodiments, the third insulating member 92 may be made of resin, foam, silicone, rubber, etc.

[0171] In some embodiments, the third insulating member 92 may be provided with a through hole, and the connecting member 80 passes through the first mounting hole 31 , and after passing through the through hole, passes through the second mounting hole 71 .

[0172] According to the technical solution of the embodiment of the present application, in the thickness direction Y of the first wall, the end plate 30 is separated from the mounting beam 70 by the third insulating member 92 , thereby reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1 .

[0173] In some embodiments, the third insulating member 92 is made of at least one of a resin material, foam, and silicone rubber.

[0174] In some embodiments, the number of the third insulating member 92 may be plural.

[0175] The material of the plurality of third insulating members 92 may be the same, for example, the material of the plurality of third insulating members 92 may be one of resin material, foam, and silicone rubber.

[0176] Alternatively, the materials of the plurality of third insulating members 92 may be different. For example, a portion of the third insulating members 92 may be made of a resin material, and another portion of the third insulating members 92 may be made of foam or the like.

[0177] In some embodiments, the third insulating member 92 may also be made of other polymer materials with insulating properties and low strength.

[0178] In the technical solution of the embodiment of the present application, resin materials, foams, and silicone rubber have good insulation performance and low hardness. The material of the third insulating member 92 is selected from resin materials, foams, or silicone rubber to reduce the risk of insulation failure of the battery device 1 and the risk of the third insulating member 92 damaging the end plate 30 or the mounting beam 70.

[0179] Please refer to Figures 3 to 5In some embodiments, the number of the end plates 30 is two, the two end plates 30 are spaced apart along the first direction X, and the plurality of battery cells 21 are disposed between the two end plates 30. The battery device 1 further includes a binding member 32, which cooperates with the end plates 30 to clamp the plurality of battery cells 21.

[0180] In some embodiments, the two end plates 30 are spaced apart along the first direction X and contact two ends of the battery cell assembly 20 in the first direction X, respectively.

[0181] In some embodiments, the binding member 32 is disposed around the outer circumference of the battery cell 21 and contacts the end surface of the end plate 30 facing away from the battery cell assembly 20 to clamp the plurality of battery cells 21 .

[0182] The technical solution of the embodiment of the present application clamps the battery cell assembly 20 by means of the binding member 32 and the two end plates 30 , which has a better effect of resisting the expansion force of the battery cell assembly 20 and improves the reliability of the battery device 1 .

[0183] Please refer to Figures 3 to 5 In some embodiments, at least one binding member 32 is made of metal, and the potential assembly 40 is electrically connected to the end plate 30 through the binding member 32 .

[0184] In some embodiments, the material of the binding member 32 is metal. The binding member 32 and the battery cell 21 can be isolated by an insulating material to reduce the risk of insulation failure of the battery cell. At the same time, the binding member 32 is in direct contact with the end plate 30, that is, the potential component 40 can be electrically connected to the binding member 32, thereby achieving electrical connection with the end plate 30.

[0185] In some embodiments, there may be a plurality of binding members 32. All of the binding members 32 may be made of metal. Alternatively, some of the binding members 32 may be made of plastic, and another portion of the binding members 32 may be made of metal.

[0186] In some embodiments, there may be two binding members 32. One binding member 32 may be made of plastic, and the other binding member 32 may be made of metal, wherein the metal may be steel.

[0187] In some embodiments, the potential assembly 40 may be connected to the binding 32 by welding.

[0188] In some embodiments, the potential component 40 may also be directly electrically connected to the end plate 30 .

[0189] According to the technical solution of the embodiment of the present application, the potential component 40 is electrically connected to the end plate 30 through the binding member 32, thereby realizing the equipotential connection between the end plate 30 and the first wall 11, reducing the risk of electrical breakdown of the battery device 1 during use. At the same time, the potential component 40 can realize the non-equipotential connection between the end plate 30 and the first wall 11, reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1.

[0190] An embodiment of the present application further provides an electrical device, comprising the battery device 1 of any of the above embodiments, wherein the battery device 1 is used to provide electrical energy to the electrical device.

[0191] Please refer to Figure 3 In some embodiments, the battery device 1 includes a box body 10, a battery cell assembly 20, an end plate 30 and a potential assembly 40. The box body 10 includes a bottom wall, the battery cell assembly 20 is arranged on the bottom wall, and a mounting beam 70 is arranged on a side of the bottom wall facing the battery cell assembly 20. The battery cell assembly 20 includes a plurality of battery cells 21 stacked along a first direction X, and the number of the end plates 30 is two, and the two end plates 30 are respectively arranged at both ends of the battery cell assembly 20 in the first direction X.

[0192] The end plate 30 is insulated and connected to the mounting beam 70. One end of the potential assembly 40 is connected to the mounting beam 70, and the other end is connected to the end plate 30. When the battery device 1 is working normally, the potential assembly 40 connects the mounting beam 70 and the end plate 30 with equal potential. When the battery device 1 is in thermal runaway, the potential assembly 40 connects the mounting beam 70 and the end plate 30 with non-equipotential.

[0193] The technical solution of the embodiment of the present application realizes equipotential connection and non-equipotential connection between the end plate 30 and the first wall through the potential component 40, thereby reducing the risk of insulation failure of the battery device 1 and improving the reliability of the battery device 1.

[0194] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body including a first wall; A battery cell assembly is contained in the box and disposed on the first wall, wherein the battery cell assembly includes a plurality of battery cells stacked along a first direction; An end plate, arranged at an end of the battery cell assembly along the first direction, and the end plate is insulated and connected to the first wall; A potential component has one end connected to the end plate and the other end connected to the first wall. The potential component is configured to connect the end plate and the first wall at an equipotential in a first state and to connect the end plate and the first wall at a non-equipotential in a second state.

2. The battery device according to claim 1, characterized in that: The potential assembly includes a protection member, two ends of which are respectively connected to the end plate and the first wall at the same potential, and the protection member can be disconnected so that the potential assembly can connect the end plate and the first wall at a non-equipotential manner.

3. The battery device according to claim 2, characterized in that: The protection element is a fuse.

4. The battery device according to claim 2, characterized in that: The battery device further comprises a detection element and a control element, wherein the detection element is used to detect at least one of the voltage of the end plate, the smoke in the box body and the temperature in the box body; The detection component and the potential component are respectively connected to the control component signal, the control component is used to receive and process the detection signal of the detection component, and the control component is used to control the protection component to disconnect.

5. The battery device according to claim 4, characterized in that: The detection element is at least one of a voltage sensor, a smoke sensor and a temperature sensor.

6. The battery device according to claim 1, characterized in that: The box body further includes a mounting beam, which is disposed between the end plate and the first wall along a thickness direction of the first wall, and the end plate is insulated and connected to the mounting beam.

7. The battery device according to claim 6, characterized in that: The end plate is provided with a first mounting hole, the mounting beam is provided with a second mounting hole corresponding to the first mounting hole, and the battery device includes a connecting member, which is passed through the first mounting hole and the second mounting hole to connect the end plate with the mounting beam.

8. The battery device according to claim 7, characterized in that: The connecting piece is made of insulating material.

9. The battery device according to claim 7, characterized in that: The battery device further includes a first insulating member, at least a portion of which is located inside the end plate and between the connecting member and the hole wall of the first mounting hole, so that the connecting member is insulated and connected to the hole wall of the first mounting hole.

10. The battery device according to claim 9, characterized in that: The first insulating member is made of at least one of quartz and alumina ceramics.

11. The battery device according to claim 7, characterized in that: The battery device further includes a second insulating member, at least a portion of which is located inside the mounting beam and between the connecting member and the hole wall of the second mounting hole, so that the connecting member is insulated and connected to the hole wall of the second mounting hole.

12. The battery device according to claim 11, characterized in that: The second insulating member is made of at least one of quartz and alumina ceramics.

13. The battery device according to claim 6, characterized in that: The battery device further includes a third insulating member disposed between the end plate and the mounting beam along a thickness direction of the first wall.

14. The battery device according to claim 13, characterized in that: The third insulating member is made of at least one of a resin material, foam, and silicone rubber.

15. The battery device according to claim 1, characterized in that: The number of the end plates is two, the two end plates are arranged at intervals along the first direction, and the plurality of battery cells are arranged between the two end plates; The battery device further comprises a binding member, and the binding member cooperates with the end plate to clamp a plurality of the battery cells.

16. The battery device according to claim 15, characterized in that: At least one of the binding parts is made of metal, and the potential component is electrically connected to the end plate through the binding part.

17. An electrical device, characterized in that: It comprises a battery device as described in any one of claims 1 to 16, wherein the battery device is used to provide electrical energy to the electrical device.

Images