Battery device, electric device and energy storage device

Abstract

The application provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a box body, a busbar and a liquid inlet detection mechanism. The box body has an electrical compartment. The bottom wall of the electrical compartment comprises a conductive area. The busbar is at least partially located in the electrical compartment. The liquid inlet detection mechanism comprises an insulating water accumulation box, a triggering component and an insulation detection component. The insulating water accumulation box is fixedly installed in the electrical compartment. The insulating water accumulation box is provided with an inner cavity and a liquid inlet hole communicating with the inner cavity and the electrical compartment. The triggering component is electrically connected with the busbar. At least part of the triggering component is located in the inner cavity. The surface of the triggering component facing the bottom wall is located below the liquid inlet hole. In the case that the liquid level in the inner cavity is not lower than the surface of the triggering component facing the bottom wall, the triggering component triggers the busbar to be electrified with the conductive area. The insulation detection component is electrically connected with the box body and is used for detecting the potential of the box body. The first direction is the thickness direction of the bottom wall. The present application can improve the sensitivity of water inlet detection in the battery pack.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are crucial for sustainable social development. Batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a critical factor in its development.

[0003] Water ingress into a battery pack can cause short circuits in the internal circuitry, leading to serious accidents such as overheating, fire, or even explosion. Therefore, improving the sensitivity of water ingress detection in battery packs is a crucial issue. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one object of this application is to provide a battery device, electrical appliance, and energy storage device to improve the sensitivity of water ingress detection within a battery pack.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a housing, a busbar, and a liquid ingress detection mechanism. The housing has an electrical compartment, and the bottom wall of the electrical compartment includes a conductive area. At least a portion of the busbar is located within the electrical compartment. The liquid ingress detection mechanism includes an insulating water collection box, a triggering component, and an insulation detection component. The insulating water collection box is fixedly installed within the electrical compartment and has an inner cavity and a liquid ingress hole. The inner cavity communicates with the electrical compartment through the liquid ingress hole. The triggering component is a conductor and is electrically connected to the busbar. At least a portion of the triggering component is located within the inner cavity, and the surface of the triggering component facing the bottom wall is a first surface. The minimum distance between the first surface and the bottom surface of the inner cavity along a first direction is less than the minimum distance between the liquid ingress hole and the bottom surface of the inner cavity along the first direction. The triggering component is configured to trigger the busbar and the conductive area to be energized when the liquid level in the inner cavity is not lower than the first surface. The insulation detection component is electrically connected to the housing and is used to detect the potential of the housing. The first direction is the thickness direction of the bottom wall.

[0006] In the technical solution of this application embodiment, a liquid ingress detection mechanism is provided. This mechanism includes an insulating water collection box, a triggering component, and an insulating detection component. The insulating water collection box is installed inside the electrical compartment, and liquid in the electrical compartment can enter the inner cavity of the insulating water collection box. When the liquid in the inner cavity does not reach the first surface of the triggering component, the liquid in the inner cavity does not contact the triggering component, the triggering component and the conductive area are in an open circuit state, and the conductive area and the busbar are not connected. When the liquid in the inner cavity reaches the first surface, the liquid in the inner cavity contacts the triggering component, the triggering component triggers the conductive area to conduct through the busbar, the casing becomes energized, and is detected by the insulating detection component. This embodiment detects whether water has entered the battery pack by detecting the resistance change between the busbar and the casing using the insulating detection component. Since the busbar is a conductive component in the high-voltage circuit of the battery device, the voltage of the busbar is often as high as hundreds of volts. Therefore, the resistance change amplitude between the busbar and the casing is large, making it easier to detect, thus improving the sensitivity of water ingress detection. Moreover, the technical solution of this embodiment does not introduce additional low-voltage wiring harnesses and electronic components.

[0007] In some embodiments, the insulating water collection box includes a base plate disposed opposite to a bottom wall. The base plate has a through hole extending through its own thickness, and the orthographic projection of the through hole along a first direction onto the bottom wall at least partially coincides with the conductive area. This embodiment, by providing the through hole, allows liquid to directly contact the conductive area, thereby directly connecting the conductive area and the triggering component, eliminating the need for additional electrical connectors.

[0008] In some embodiments, the base plate has a recessed portion that is recessed into the inner cavity; the battery device also includes a flexible sealing ring, which is accommodated in the recessed portion and disposed between the base plate and the bottom wall. The flexible sealing ring is used to seal the gap between the base plate and the bottom wall, and the central hole of the flexible sealing ring is opposite to and communicates with the through hole.

[0009] By setting a flexible sealing ring, the gap between the base plate and the bottom wall can be well filled, so that the liquid in the inner cavity will not flow back to the electrical chamber through the gap, but can accumulate in the inner cavity to ensure that the triggering component can conduct through the liquid to the conductive area.

[0010] In some embodiments, the housing includes a liquid cooling plate and a frame. The liquid cooling plate is located on one side of the frame and is fixedly connected to the frame. The liquid cooling plate is used to support the battery cells and the insulating water collection box. The surface of the liquid cooling plate facing the insulating water collection box includes an insulating material covered area and an exposed area. The insulating material covered area is covered with a first insulating layer, and the exposed area serves as a conductive area.

[0011] In this technical solution, the conductive area is part of the enclosure. When the conductive area and the triggering component are energized, the enclosure becomes energized.

[0012] In some embodiments, the busbar is located outside the insulating water collection box. The busbar includes a first conductive segment and a second conductive segment connected together. The circumferential side of the first conductive segment is covered with a second insulating layer. The first conductive segment is fixedly connected to the insulating water collection box, and the second conductive segment is electrically connected to the triggering component.

[0013] In this embodiment, by fixing the first conductive segment to the insulating water collection box, the possibility of the busbar shaking due to the vibration of the battery device is reduced.

[0014] In some embodiments, the liquid ingress detection mechanism further includes an insulating protective sleeve fitted around the outer periphery of the second conductive segment. The insulating protective sleeve has a receiving space and a channel. The receiving space is open at both ends along the extension direction of the second conductive segment. A portion of the triggering component is located within the receiving space, and the triggering component is inserted into the channel.

[0015] By installing an insulating protective sleeve, the second conductive section is electrically isolated from other electrical components to prevent short circuits and to prevent accidental contact by operators, thus improving safety.

[0016] In some embodiments, the insulating protective sleeve includes a enclosure and a locking structure. The enclosure includes a first part and a second part. The locking structure has a locked state and an unlocked state. In the locked state, the first part and the second part are fixed to each other by the locking structure, and the first part and the second part interlock and enclose a receiving space. In the unlocked state, the first part can move relative to the second part to open the second part, and the second conductive segment can pass through the open position of the second part.

[0017] With this technical solution, the insulating protective sleeve is directly assembled onto the outer periphery of the second conductive section, making the installation of the insulating protective sleeve easier.

[0018] In some embodiments, the enclosure wall has a weak portion, and the first portion, the weak portion and the second portion are connected sequentially along the circumference of the second conductive segment; in the unlocked state, the weak portion can bend and deform around the rotation axis under external force, and can recover its deformation after the external force is removed, and the extension direction of the rotation axis is parallel to the extension direction of the second conductive segment.

[0019] Using this technical solution, after the external force is removed, the enclosure wall can automatically drive the first part to rotate by restoring its deformation.

[0020] In some embodiments, the enclosure includes a plurality of wall portions, one of which has a groove, and the other of which forms a weak portion at the location where the groove is provided; in the locked state, the plurality of wall portions are connected end to end in sequence and together enclose the receiving space.

[0021] In some embodiments, the locking structure includes a latch and a slot, the latch and the slot being able to engage or disengage; the latch is connected to one of the first part and the second part, and the slot is located in the other of the first part and the second part.

[0022] In some embodiments, the inner cavity has an opening at one end opposite to the bottom wall along a first direction, an insulating protective sleeve is provided over the opening, and a triggering component extends into the inner cavity through the opening.

[0023] Using this technical solution, the insulating protective sleeve can both electrically isolate the second conductive section from other electrical components and seal the opening, making the insulating protective sleeve a multi-purpose device.

[0024] In some embodiments, the insulating water collection box includes a box body and a lug, the inner surface of the box body encloses an inner cavity, the lug is connected to one end of the box body facing the busbar in a first direction, and the lug is fixedly connected to the box body; the battery device also includes a binding strap, and the first conductive segment is bound and fixed to the lug by the binding strap.

[0025] In this embodiment, the first conductive segment is tied to the lug with a binding strap, which can provide flexible constraint while ensuring the fixation of the first conductive segment. In this way, under conditions such as vibration and impact, the binding strap will not transmit stress like rigid connection methods such as bolt connection or welding connection.

[0026] In some embodiments, the lug includes a body and a protrusion. The protrusion protrudes from the surface of the body away from the bottom wall and is fixedly connected to the housing by a fastener. The fastener extends along a first direction, and the head of the fastener is located on the side of the protrusion away from the bottom wall. The first conductive segment includes a straight segment and a bent segment. The extension direction of the straight segment is parallel to the extension direction of the second conductive segment. The straight segment is opposite to the body and fixed to the lug. The bent segment has a first end and a second end arranged sequentially along the extension direction. The first end is connected to the second conductive segment through the straight segment. From the first end to the second end, the bent segment bends and extends to the side of the head away from the bottom wall and is spaced apart from the head along the first direction.

[0027] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0028] An embodiment of the third aspect of this application provides an energy storage device that includes the battery device described above, the battery device being capable of storing and providing electrical energy.

[0029] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0030] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0031] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0032] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0033] Figure 3 This is a partial schematic diagram of a battery device according to some embodiments of this application;

[0034] Figure 4 This is a partial cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0035] Figure 5 for Figure 3 The diagram shown is a structural schematic of the battery device without the casing.

[0036] Figure 6 for Figure 5 The diagram shown is an exploded view of the structure.

[0037] Figure 7 for Figure 5 A bottom view of the structure shown;

[0038] Figure 8 for Figure 5 A top view of the structure shown;

[0039] Figure 9 For along Figure 8 Schematic diagram of the cross section of line AA in the middle;

[0040] Figure 10 This is a schematic diagram of the bus structure in some embodiments of this application;

[0041] Figure 11 This is a schematic diagram of the structure of the insulating protective sleeve according to some embodiments of this application;

[0042] Figure 12 for Figure 5 The diagram shows the front view of the structure.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1000 vehicles;

[0045] Battery unit 100, controller 200, motor 300;

[0046] Battery cell module 10, battery cell 11;

[0047] Battery box 20, box cover 21, box body 22, bottom wall 220, conductive area 2200, liquid cooling plate 221, heat exchange channel 2211, frame 222, expansion beam 223, reinforcing beam 224, electrical compartment 225, bracket 226.

[0048] Busbar 30, first conductive section 33, straight section 331, bent section 332, second conductive section 34, second insulating layer 35;

[0049] Insulating water collection box 40, box body 41, liquid inlet hole 412, inner cavity 413, bottom plate 414, recessed part 4141, protruding part 4142, through hole 4143, lug 42, body 421, through hole 4211, protruding part 422.

[0050] Trigger component 50, first surface 51;

[0051] Insulating protective sleeve 60, enclosure 61, wall portion 611, first wall portion 611a, second wall portion 611b, third wall portion 611c, fourth wall portion 611d, groove 6110, weak portion 6111, cylindrical wall 612, channel 6120, locking structure 62, bayonet 621, buckle 622, connecting arm 6221, snap connector 6222;

[0052] Fastener 70, head 71;

[0053] 80 straps;

[0054] 90 for sealant, 91 for flexible sealing ring. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0061] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components.

[0063] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0064] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0065] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0066] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0067] The sealing performance of a battery pack directly affects the safety, reliability, and lifespan of the battery system. Some related technologies utilize low-voltage detection to check for water ingress. Specifically, the Battery Management System (BMS) has two pins, each with a low-voltage wiring harness. These harnesses connect to a low-voltage connector inside the battery pack. A detection signal is applied between the two pins, and the feedback signals generated by the pins in response are acquired. Based on the detection and feedback signals, the resistance between the two pins is determined, and this resistance is used to determine if water has entered the battery pack. Under normal circumstances, the two pins are not connected, and the resistance between them is high. When water enters the low-voltage connector, the water forms a conductive medium, the two pins become conductive, and the resistance between them decreases.

[0068] In this method, the detection signal is typically a low-voltage signal, and the corresponding feedback signal is a current signal with relatively small changes. It is evident that in low-voltage detection, the amplitude of the feedback signal change is small and difficult to detect, resulting in low detection sensitivity. Furthermore, this method introduces multiple additional low-voltage wiring harnesses. In practical applications, the detection signal is usually an AC signal. To reduce signal interference, low-voltage connectors often require the inclusion of capacitors, resistors, and other electronic components, thus introducing additional electronic components.

[0069] To address at least one of the aforementioned problems, this application designs a battery device in which liquid from the electrical compartment enters an insulating water collection box. When the liquid level in the insulating water collection box rises to contact a triggering component extending into the box, the triggering component connects the busbar and the housing, energizing the housing, which is then detected by an insulation detection component. In this battery device, the high-voltage characteristics of the busbar are utilized to increase the resistance change amplitude between the busbar and the housing, making it easier to detect and thus improving the sensitivity of water ingress detection.

[0070] The battery device provided in this application can be used, but is not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. A power system incorporating the battery device provided in this application can be used to construct such electrical equipment or energy storage device.

[0071] The energy storage device utilizing a battery as a power system in this application embodiment can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage device provided in this application embodiment can be used in any power system that requires energy storage.

[0072] In some embodiments, the energy storage device is an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0073] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet. Each battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, these clusters are connected in parallel to increase the capacity of the energy storage device.

[0074] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0075] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0076] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0077] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0078] Figure 2 A schematic diagram of the structure of a battery device 100 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0079] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0080] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0081] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a battery case 20 and one or more individual battery cells 10, with the individual battery cells 10 housed within the battery case 20. The battery case 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple cuboids, cylinders, or spheres. The battery case 20 can be made of alloy materials such as aluminum alloy or iron alloy, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0082] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the battery box 20 by fixing the battery module in the battery box 20.

[0083] As an example, the battery cell assembly 10 can also be housed in the battery box 20 by directly fixing multiple battery cells 11 to the battery box 20.

[0084] As an example, the battery box 20 may include a cover 21 and a body 22. The cover 21 and the body 22 are fastened together to form a closed space inside the battery box 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells 11. The cover 21 may be a top cover or a bottom plate.

[0085] As an example, the battery box 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the battery box 20 forms an enclosed space to accommodate the battery cell assembly 10.

[0086] In some embodiments, the battery box 20 may be part of the vehicle's chassis structure. For example, a portion of the battery box 20 may be at least a part of the vehicle's floor, or a portion of the battery box 20 may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0087] The battery cell 11 involved in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0088] The battery cell 11 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, or a battery cell 11 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells, etc., and this application has no particular limitation.

[0089] Figure 3 This is a partial schematic diagram of a battery device according to some embodiments of this application. Figure 4 This is a partial cross-sectional schematic diagram of a battery device according to some embodiments of this application. Figure 5 for Figure 3 The diagram shown omits the casing of the battery device. Figure 6 for Figure 5 The diagram shown is an exploded view of the structure. Figure 7 for Figure 5 The diagram shown is a bottom view of the structure. Figure 8 for Figure 5 The diagram shown is a top view of the structure. Figure 9 For along Figure 8 A cross-sectional view of line AA. Please refer to [link / reference]. Figures 3 to 6 In this embodiment, the battery device includes an electrical compartment 225 in its housing 22, and the bottom wall 220 of the electrical compartment 225 includes a conductive area 2200. The battery device also includes a busbar 30 and a liquid ingress detection mechanism. At least a portion of the busbar 30 is located within the electrical compartment 225. (See also...) Figures 7 to 9 The liquid ingress detection mechanism includes an insulating water collection box 40, a triggering component 50, and an insulation detection component. The insulating water collection box 40 is fixedly installed inside the electrical compartment 225. The insulating water collection box 40 has an inner cavity 413 and a liquid ingress hole 412. The inner cavity 413 is connected to the electrical compartment 225 through the liquid ingress hole 412. The triggering component 50 is a conductor and is electrically connected to the busbar 30. At least a portion of the triggering component 50 is located in the inner cavity 413. The surface of the triggering component 50 facing the bottom wall 220 is a first surface 51. The minimum distance between the first surface 51 and the bottom surface of the inner cavity 413 along a first direction is less than the minimum distance between the liquid ingress hole 412 and the bottom surface of the inner cavity 413 along a first direction. The triggering component 50 is configured to trigger the busbar 30 and the conductive area 2200 to be energized when the liquid level in the inner cavity 413 is not lower than the first surface 51. The insulation detection component is electrically connected to the housing 22 and is used to detect the potential of the housing 22. The first direction refers to the thickness direction of the bottom wall 220. In the accompanying drawings of this application, the first direction can be referred to as the X direction.

[0090] As an example, such as Figure 3 and Figure 4As shown, the battery device may also include an expansion beam 223, which is disposed within the housing 22 and divides the internal space of the housing 22 into a battery compartment and an electrical compartment 225. The battery compartment is used to house individual battery cells. The electrical compartment 225 is a space for housing electrical components such as the busbar 30 and high-voltage box. The bottom wall 220 of the electrical compartment 225 is used to support the components housed within the electrical compartment 225. The conductive area 2200 refers to the area that can be used for current transmission or electrical connection. The material of the conductive area 2200 has good conductivity. (See [reference needed] for details on the conductive area 2200.) Figure 3 The section line area. The section line is only a graphic shown to illustrate the conductive area 2200 and does not represent the cross-sectional structure. Furthermore, this section line graphic does not exist in the actual structure of the enclosure.

[0091] Bus 30 is responsible for transferring electrical energy between battery cell modules and high-voltage electrical components (e.g., inverters, DC / DC converters, high-voltage boxes); that is, bus 30 is a conductive component in the high-voltage circuit within the battery device. In some embodiments, the battery device may further include a high-voltage box housed in electrical compartment 225. Each battery cell module has a total positive output terminal and a total negative output terminal, each connected to the high-voltage box via bus 30. Bus 30 may be made of conductive material; for example, bus 30 may be copper or aluminum. Thus, the battery device has multiple bus 30s, and any one of the bus 30s can be electrically connected to the triggering component 50.

[0092] The insulating water collection box 40 is a structure used to collect liquid within the electrical compartment 225 and maintains electrical insulation from both high-voltage and low-voltage electrical components. The insulating water collection box 40 is made of polymer insulating materials such as polycarbonate (PC), polyester film (PET), and polyimide (PI). The insulating water collection box 40 has a liquid inlet 412, which connects the inner cavity 413 and the electrical compartment 225. The liquid inlet 412 can be located on the side wall of the box body 41 or on the top wall of the box body 41. As an example, the liquid inlet 412 is provided on the side wall of the box body 41, allowing liquid in the electrical compartment 225 to more easily enter the inner cavity 413 through the liquid inlet 412. The liquid inlet 412 can be rectangular, circular, or elongated, etc. As an example, the inlet hole 412 is rectangular, and the minimum distance along the first direction between the inlet hole 412 and the bottom surface of the inner cavity 413 is the straight-line distance between the bottom edge of the inlet hole 412 and the bottom surface of the inner cavity 413. Figure 9 L1 is shown in the figure. As an example, the liquid inlet 412 is circular, and the minimum distance between the liquid inlet 412 and the bottom surface of the inner cavity 413 along the first direction is the straight-line distance between the lowest point of the liquid inlet 412 in the first direction and the bottom surface of the inner cavity 413.

[0093] When the liquid level in the inner cavity 413 reaches L1, the liquid in the inner cavity 413 will not increase further, because if the liquid level exceeds L1, it will flow out from the inlet hole 412. Therefore, the minimum distance between the inlet hole 412 and the bottom surface of the inner cavity 413 along the first direction can be understood as the highest water level of the inner cavity 413. The highest water level refers to the highest liquid level position that the inner cavity 413 is allowed to store; in other words, the maximum allowable height that the liquid surface in the inner cavity 413 can reach.

[0094] "Trigger component 50 is a conductor" means that trigger component 50 is a conductive component made of a conductive material (e.g., copper, aluminum, silver), and trigger component 50 has conductivity. The first surface 51 is the bottom end face of trigger component 50. As an example, such as... Figure 9 As shown, the first surface 51 can be a plane. As an example, the first surface 51 can also be an arc-shaped surface. In this case, the minimum distance between the first surface 51 and the bottom surface of the inner cavity 413 along the first direction can be understood as the straight-line distance between the lowest point of the arc-shaped surface in the first direction and the bottom surface of the inner cavity 413. The minimum distance between the first surface 51 and the bottom surface of the inner cavity 413 along the first direction is denoted as L2. "L2 < L1" indicates that the liquid inlet hole 412 is located above the first surface 51 and is spaced apart from the first surface 51 along the first direction. In other words, the portion of the triggering component 50 located in the inner cavity 413 extends below the liquid inlet hole 412. When the liquid level in the inner cavity 413 reaches the highest water level, the liquid in the inner cavity 413 will definitely come into contact with the triggering component 50. When the liquid level in the inner cavity 413 is not lower than the first surface 51, the liquid in the inner cavity 413 comes into contact with the triggering component 50. The liquid acts as a conductive medium, which energizes the triggering component 50 and the conductive area 2200. Then, the triggering component 50 and the conductive area 2200 change from an open circuit state to a connected state, thereby energizing the conductive area 2200.

[0095] The trigger component 50 can be directly connected to the bus 30, for example, by soldering, abutting, conductive adhesive bonding, or other methods. Alternatively, the trigger component 50 can also be indirectly connected to the bus 30 via other conductive structures. In some examples, such as... Figure 6 As shown, the trigger component 50 can be a metal screw, which is directly screwed to the busbar 30, thus avoiding the introduction of additional conductive structures. Furthermore, L2 can be adjusted by turning the metal screw. A smaller L2 means that a small amount of liquid entering the inner cavity 413 is enough to make the trigger component 50 conductive with the conductive area 2200.

[0096] An insulation detection component, also known as an insulation monitoring device (IMD), is used to detect the energized state of the enclosure 22. This insulation detection component can be implemented using any known technical means. In some examples, the battery device also includes a battery management system (BMS), which has insulation detection capabilities, meaning it can detect the electrical isolation between the high-voltage circuit of the battery device and the enclosure 22. In this example, the BMS can be used as the insulation detection component, utilizing its insulation detection capabilities to detect the energized state of the enclosure 22. Furthermore, when the BMS detects that the enclosure 22 is energized, it can also issue an alarm signal to alert the user to early detection of water ingress into the enclosure. The following description uses the BMS as an example of the insulation detection component for illustrative purposes.

[0097] The following describes the water ingress detection mechanism of the battery pack in this application. In one application scenario, the battery device of this embodiment is used in an electric vehicle. During long-term use, the battery device may fail to seal due to impacts to the chassis. Thus, when the electric vehicle faces complex scenarios such as speeding through flooded sections or stalling in flooded areas, liquid can easily penetrate the protection of the battery device and enter the electrical compartment 225. Subsequently, when the electric vehicle continues to drive, the battery device will shake, and the liquid that has entered the electrical compartment 225 will splash and enter the inner cavity 413 through the liquid inlet 412. When the liquid level in the insulating water collection box 40 rises to the first surface 51, the liquid comes into contact with the triggering component 50, forming a conductive path: busbar 30 - triggering component 50 - liquid in the inner cavity 413 - conductive area 2200, making the housing 22 energized. The battery management system detects that the housing 22 is energized and issues an alarm signal.

[0098] In another application scenario, the battery device of this embodiment experiences a sealing failure during transportation, causing external water to enter the electrical compartment 225. When using the battery device of this embodiment as an energy storage device or electrical appliance in a power system, liquid in the electrical compartment 225 flows into the inner cavity 413 through the inlet hole 412. If the liquid level in the insulating water collection box 40 is not lower than the first surface 51, the triggering component 50 triggers the busbar 30 to connect with the conductive area 2200, and the battery management system detects that the housing 22 is energized and issues an alarm signal.

[0099] In another application scenario, the battery device of this embodiment may further include a heat exchange device. The heat exchange device is provided with a heat exchange channel 2211 for the flow of heat exchange medium, which is used to exchange heat with the battery cells to regulate the temperature of the battery cells. If a leak occurs in the portion of the heat exchange channel 2211 located in the electrical compartment 225, the heat exchange medium leaks into the electrical compartment 225 and flows into the inner cavity 413. If the liquid level of the heat exchange medium in the insulating water collection box 40 rises to the first surface 51, a conductive path is formed between the manifold 30 and the conductive area 2200. The battery management system detects that the housing 22 is energized and issues an alarm signal. Therefore, this embodiment can also be used to detect heat exchange medium leaks.

[0100] In this embodiment, when the liquid level in the inner cavity 413 is lower than the first surface 51, the triggering component 50 and the conductive area 2200 are in an open circuit state, and the conductive area 2200 and the busbar 30 are not connected; when the liquid level in the inner cavity 413 is not lower than the first surface 51, the triggering component 50 triggers the conductive area 2200 and the busbar 30 to conduct. This embodiment detects water ingress by detecting the resistance change between the busbar 30 and the housing 22 using an insulation detection component. Since the busbar 30 is a conductive component in the high-voltage circuit of the battery device, the voltage of the busbar 30 is often as high as hundreds of volts. Therefore, the resistance change amplitude between the busbar 30 and the housing 22 is relatively large, making it easier to detect and thus improving the sensitivity of water ingress detection. Moreover, this embodiment does not introduce additional low-voltage wiring harnesses and electronic components.

[0101] It is understandable that the conductive area 2200 can be located directly below the inner cavity 413 or not directly opposite the insulating water collection box 40. As long as the liquid level in the inner cavity 413 is not lower than the first surface 51, the triggering component 50 can be connected to the conductive area 2200 through the liquid in the inner cavity 413.

[0102] In some embodiments, the orthographic projection of the insulating water collection box 40 along the first direction onto the bottom wall 220 does not coincide with the conductive area 2200. The battery device may also include an electrical connector, one end of which is electrically connected to the conductive area 2200 by welding, abutment, or other means, and the other end of which penetrates into or is exposed in the inner cavity 413, and is located between the bottom surface of the trigger member 50 and the bottom surface of the inner cavity 413 and does not contact the trigger member 50. In this embodiment, the liquid that invades the electrical compartment 225 enters the inner cavity 413, and then the amount of liquid in the inner cavity 413 gradually increases. The liquid first overflows the other end of the electrical connector until the liquid level in the inner cavity 413 reaches the first surface 51. At this time, the liquid acts as a conductive medium between the trigger member 50 and the electrical connector, thus forming a conductive path: busbar 30 - trigger member 50 - liquid in the inner cavity 413 - electrical connector - conductive area 2200.

[0103] In other embodiments, such as Figure 4 , Figures 7 to 9 As shown, the insulating water collection box 40 includes a base plate 414, which is disposed opposite to the bottom wall 220. The base plate 414 may be provided with a through hole 4143 that penetrates its own thickness. The orthographic projection of the through hole 4143 along the first direction on the bottom wall 220 at least partially coincides with the conductive area 2200.

[0104] In this embodiment, the conductive area 2200 is located directly below the inner cavity 413. In some embodiments, the insulating water collection box 40 can be placed on the bottom wall 220 of the electrical compartment 225, and the bottom plate 414 can be attached to the bottom wall 220.

[0105] The orthographic projection of the via 4143 along the first direction onto the bottom wall 220 can completely coincide with or partially coincide with the conductive area 2200. As an example, the orthographic projection of the via 4143 along the first direction onto the bottom wall 220 can completely coincide with the conductive area 2200. The shape and size of the via 4143 are the same as the shape and size of the conductive area 2200. As an example, the orthographic projection of the via 4143 along the first direction onto the bottom wall 220 can also fall within the conductive area 2200, that is, the outer periphery of the conductive area 2200 surrounds the outer periphery of the orthographic projection of the via 4143 along the first direction onto the bottom wall 220.

[0106] In this embodiment, the liquid that invades the electrical compartment 225 enters the inner cavity 413, flows into the through hole 4143 and comes into contact with the conductive area 2200. Then the amount of liquid in the inner cavity 413 gradually increases until the liquid level in the inner cavity 413 reaches the first surface 51, at which point a conductive path is formed: busbar 30 - trigger component 50 - liquid in the inner cavity 413 - liquid in the through hole 4143 - conductive area 2200.

[0107] In this embodiment, by providing a through hole 4143, the liquid can directly contact the conductive area 2200 to directly connect the conductive area 2200 and the triggering component 50, thus eliminating the need for additional electrical connectors.

[0108] Please refer to some embodiments of this application. Figure 4 , Figures 7 to 9 The base plate 414 may have a recessed portion 4141 that is recessed into the inner cavity 413. The battery device may also include a flexible sealing ring 91, which is accommodated in the recessed portion 4141 and disposed between the base plate 414 and the bottom wall 220. The flexible sealing ring 91 is used to seal the gap between the base plate 414 and the bottom wall 220, and the central hole of the flexible sealing ring 91 is opposite to and communicates with the through hole 4143.

[0109] The central axis of the flexible sealing ring 91 extends along the first direction. The flexible sealing ring 91 is made of an elastic material, such as nitrile rubber, fluororubber, or thermoplastic polyurethane (TPU). It should be noted that... Figures 4 to 6 In the illustration, the flexible sealing ring 91 is shown in a free state (i.e., before compression). In reality, the flexible sealing ring 91 is in a compressed state after being compressed. The flexible sealing ring 91 has a ring-shaped structure and a central hole. The wall of the central hole can surround the wall of the through hole 4143. Alternatively, the wall of the through hole 4143 can surround the wall of the central hole. Or, the wall of the central hole and the wall of the through hole 4143 can be coplanar.

[0110] The recess 4141 can be formed in various ways on the base plate 414. In some embodiments, the recess 4141 can be formed by removing part of the material from the surface of the base plate 414 facing the bottom wall 220 using machining methods (e.g., bored or milled). In some embodiments, such as Figure 4 , Figure 7 and Figure 9 As shown, a portion of the base plate 414 can protrude towards the inner cavity 413 to form a protrusion 4142, and the protrusion 4142 defines a recess 4141 on the side opposite to the inner cavity 413. In this example, a through hole 4143 is specifically provided in the protrusion 4142 and penetrates the thickness of the protrusion 4142. The shape of the recess 4141 can be adapted to the shape of the flexible sealing ring 91. For example, if the flexible sealing ring 91 is cylindrical, the recess 4141 is correspondingly circular.

[0111] In this embodiment, the liquid that invades the electrical compartment 225 enters the inner cavity 413. The liquid flows into the central hole through the through hole 4143 and comes into contact with the conductive area 2200. As more liquid enters the inner cavity 413, both the central hole and the through hole 4143 are filled with liquid. Then the liquid level in the inner cavity 413 gradually rises until it reaches the first surface 51. At this time, a conductive path is formed: busbar 30 - trigger component 50 - liquid in the inner cavity 413 - liquid in the through hole 4143 - liquid in the central hole - conductive area 2200.

[0112] By setting a flexible sealing ring 91, which has a certain degree of elasticity and compressibility, it can adapt to the gap between the base plate 414 and the bottom wall 220 through its own deformation. In this way, the gap is well filled, so that the liquid in the inner cavity 413 will not flow back to the electrical compartment 225 through the through hole 4143 and the gap between the base plate 414 and the bottom wall 220. The liquid can accumulate in the inner cavity 413, so that the liquid level in the inner cavity 413 can rise, ensuring that the triggering component 50 can conduct through the liquid to the conductive area 2200, thereby effectively realizing the detection of water ingress inside the package.

[0113] By providing a recessed portion 4141 and accommodating a flexible sealing ring 91 within it, on the one hand, it is easier to accurately locate the installation position of the flexible sealing ring 91; on the other hand, the recessed portion 4141 can restrict the movement of the flexible sealing ring 91, ensuring that the central hole of the flexible sealing ring 91 can reliably align with and communicate with the through hole 4143.

[0114] According to some embodiments of this application, please refer to Figure 4 The housing 22 may include a liquid cooling plate 221 and a frame 222. The liquid cooling plate 221 is located on one side of the frame 222 and is fixedly connected to the frame 222. The liquid cooling plate 221 is used to support the battery cells and the insulating water collection box 40. The surface of the liquid cooling plate 221 facing the insulating water collection box 40 may include an area covered by insulating material and an exposed area. The area covered by insulating material is covered with a first insulating layer, and the exposed area can serve as a conductive area 2200.

[0115] In this embodiment, the housing 22 has an open end. The liquid cooling plate 221 has internal channels for the flow of the heat exchange medium, which exchanges heat with the individual battery cells. The liquid cooling plate 221 can be welded to the frame 222, or it can be fastened to it using locking components (such as screws or bolts). Figure 4 In the middle, the liquid cooling plate 221 is located below the battery cell to support the battery cell, and the surface of the liquid cooling plate 221 facing the insulating water collection box 40 is the upper surface.

[0116] The first insulating layer can be formed on the surface of the liquid cooling plate 221 facing the insulating water collection box 40 using any known technical means, such as deposition, spraying, printing, etc. The liquid cooling plate 221 is made of a metallic conductive material. The area on the surface of the liquid cooling plate 221 facing the insulating water collection box 40 covered with the first insulating layer is the insulating material covered area, and the area on the surface of the liquid cooling plate 221 facing the insulating water collection box 40 without the first insulating layer is the exposed area. In some embodiments, the exposed area can be partially covered in advance with a masking material such as a mask or tape, the entire surface of the liquid cooling plate 221 facing the insulating water collection box 40 can be sprayed with insulating material, and then the masking material can be removed. In some embodiments, the entire surface of the liquid cooling plate 221 facing the insulating water collection box 40 can be deposited to form an insulating material, and then the insulating material in some locations can be removed to form the exposed area.

[0117] In this technical solution, the liquid cooling plate 221 serves as the bottom plate 414 of the housing 22, and also as the bottom wall 220 of the electrical compartment 225. Thus, the conductive area 2200 is part of the housing 22, and when the conductive area 2200 is energized with the triggering component 50, the housing 22 becomes energized. Compared to a technical solution where the conductive area 2200 and the housing 22 are separately formed and electrically connected, this eliminates the need for the process of electrically connecting the conductive area 2200 and the housing 22.

[0118] Figure 10 This is a schematic diagram of the structure of the bus 30 according to some embodiments of this application. According to some embodiments of this application, such as... Figure 5 As shown, busbar 30 can be located outside the insulating water collection box 40. See also... Figure 7 and Figure 10 The busbar 30 may include a first conductive segment 33 and a second conductive segment 34 connected together. The circumferential side of the first conductive segment 33 is covered with a second insulating layer 35. The first conductive segment 33 is fixedly connected to the insulating water collection box 40, and the second conductive segment 34 is electrically connected to the triggering component 50.

[0119] Both the first conductive segment 33 and the second conductive segment 34 are made of conductive materials, such as copper or aluminum. The first conductive segment 33 and the second conductive segment 34 can be cylindrical, cuboid, etc., and this embodiment is not limited to this. The first conductive segment 33 has two opposite end faces along its extension direction, and the surface between the two end faces on the outer surface of the first conductive segment 33 is the circumferential side surface of the first conductive segment 33. In some embodiments, the first conductive segment 33 is cylindrical, and the circumferential side surface of the first conductive segment 33 is the outer circumferential surface of the first conductive segment 33 surrounding its central axis. Because the circumferential side surface of the first conductive segment 33 is covered with a second insulating layer 35, the first conductive segment 33 is electrically isolated from other electrical components.

[0120] The second insulating layer 35 can be formed on the surface of the liquid cooling plate 221 facing the insulating water collection box 40 using any known technical means, such as deposition, spraying, or dip coating. No insulating material is provided on the surface of the second conductive segment 34. In some embodiments, the second conductive segment 34 can be pre-covered with a masking material such as a mask or tape, and the entire circumferential side of the busbar 30 can be sprayed with insulating material before removing the masking material. In some embodiments, the entire circumferential side of the busbar 30 can be impregnated with insulating material to form the second conductive segment 34, and then a portion of the insulating material can be removed. In some embodiments, an insulating film can also be separately fabricated and then wrapped around the first conductive segment 33.

[0121] The first conductive segment 33 and the insulating water collection box 40 can also be fixedly connected by a non-detachable connection method, such as welding, bonding, etc. Alternatively, the first conductive segment 33 and the insulating water collection box 40 can be fixedly connected by a detachable connection method, such as snap-fit, screw connection, etc., which makes it easy to separate the busbar 30 and the insulating water collection box 40.

[0122] This embodiment eliminates the need for the busbar 30 to extend into the insulating water collection box 40. It is understood that the battery device may vibrate during transportation or in applications such as electric vehicles. This embodiment, by fixing the first conductive segment 33 to the insulating water collection box 40, helps reduce the possibility of the busbar 30 shaking due to vibrations from the battery device.

[0123] Figure 11 This is a schematic diagram of the structure of the insulating protective sleeve 60 according to some embodiments of this application. Please refer to sections 3 to 4 according to some embodiments of this application. Figure 9 ,as well as Figure 11 The liquid ingress detection mechanism may further include an insulating protective sleeve 60 fitted around the outer periphery of the second conductive segment 34. The insulating protective sleeve 60 has a receiving space and a channel 6120, with the receiving space open at both ends along the extension direction of the second conductive segment 34. A portion of the triggering component 50 is located within the receiving space, and the triggering component 50 is inserted into the channel 6120.

[0124] The insulating protective sleeve 60 refers to a component used to provide insulation protection for the second conductive segment 34. The insulating protective sleeve 60 can be made of insulating materials such as polycarbonate (PC), polyester film (PET), or polyimide (PI). In some examples, the second conductive segment 34 is cylindrical, and the insulating protective sleeve 60 is arranged around the central axis of the second conductive segment 34. In some examples, the second conductive segment 34 is cuboid, and the insulating protective sleeve 60 surrounds the outer periphery of the circumferential sides of the second conductive segment 34.

[0125] The receiving space is open at both ends along the extension direction of the second conductive segment 34 to prevent interference between the first conductive segment 33 and the insulating protective sleeve 60, allowing the first conductive segment 33 to pass through both ends of the receiving space. The channel 6120 is a communicating space formed on the insulating protective sleeve 60 for the triggering component 50 to pass through. It is understood that when the triggering component 50 is not installed on the insulating protective sleeve 60, the channel 6120 connects the receiving space and the inner cavity 413; in fact, as... Figure 4 and Figure 9 As shown, the trigger component 50 is plugged into channel 6120. Figure 4 and Figure 9 In the example of triggering component 50 being a metal screw, the top of the metal screw is located in the receiving space, and the metal screw passes through the channel 6120, so that the bottom of the metal screw extends into the inner cavity 413.

[0126] By setting up an insulating protective sleeve 60, the second conductive section 34 is electrically isolated from other electrical components to prevent short circuits, and it also helps to prevent operators from accidentally touching the second conductive section 34, thus improving safety.

[0127] According to some embodiments of this application, such as Figure 11As shown, the insulating protective sleeve 60 can be configured to include a enclosure 61 and a locking structure 62. The enclosure 61 includes a first part and a second part, and the locking structure 62 is configured to have a locked state and an unlocked state. In the locked state, as... Figure 11 As shown, the first part and the second part are fixed to each other by the locking structure 62, and the first part and the second part interlock to enclose a receiving space. In the unlocked state, the first part can move relative to the second part to open the second part, and the second conductive segment 34 can pass through the open position of the second part.

[0128] A locking structure 62 is disposed on the enclosure 61. The locked state refers to the state in which the locking structure 62 restricts the movement of the first part, making the first part and the second part relatively fixed. The unlocked state refers to the state in which the locking structure 62 releases its constraint on the first part, allowing the first part to move. In the locked state, the first part and the second part together surround the outer periphery of the second conductive segment 34. In the locked state, the cross-sectional shape of the enclosure 61 along the extension direction perpendicular to the second conductive segment 34 can be rectangular, polygonal, circular, etc.

[0129] During assembly, the locking structure 62 can be first in the unlocked state, and the first part can be moved relative to the second part to open the second part (i.e., the first part and the second part are not engaged). The second conductive segment 34 can then be placed on the second part through the open position of the second part. After that, the first part can be moved relative to the second part to engage the first part and the second part. Then, the locking structure 62 can be switched to the locked state, so that the insulating protective sleeve 60 can be successfully fitted onto the outer periphery of the second conductive segment 34. After that, the busbar 30 with the insulating protective sleeve 60 can be moved into the electrical compartment 225 for installation.

[0130] Understandably, in some related technologies, the insulating protective sleeve 60 is fitted onto the outer periphery of the busbar 30 from one end, and then moved along the busbar 30 to the location of the second conductive section 34. Since the busbar 30 is typically quite long, this makes the installation of the insulating protective sleeve 60 inconvenient. Especially when the busbar 30 has bends, it is even more difficult to move the insulating protective sleeve 60 from one end of the busbar 30 to the second conductive section 34.

[0131] In this embodiment, the first part can move relative to the second part in the unlocked state, so that the second part is opened. Then the second conductive segment 34 is placed on the second part, and then the first part and the second part are fastened together. This allows the insulating protective sleeve 60 to be directly assembled on the outer periphery of the second conductive segment 34, making the installation of the insulating protective sleeve 60 easier.

[0132] The first and second parts can be connected by a kinematic pair, or they can be connected without a kinematic pair. In some embodiments, the first part covers the open position of the second part, wherein the second part can be a structure open at one end or open at both ends. As an example, the second part is a hollow structure open at one end, and correspondingly, the first part can be a plate-like structure or a hollow structure open on one side. As an example, the second part is a structure open at both ends, and the first part can also be a structure open on both sides. In this example, in the unlocked state, the first and second parts can be separated to open the second part.

[0133] In some embodiments, the first part and the second part are connected by a kinematic pair; in other words, the first part is movably connected to the second part. The movement of the first part relative to the second part includes, but is not limited to, rotation, sliding, and flipping. As an example, the first part can be hinged to the second part via a hinge axis. As an example, the first part and the second part can be connected by a prismatic pair.

[0134] According to some embodiments of this application, please refer to Figure 11 The enclosure 61 may have a weak portion 6111. The first part, the weak portion 6111, and the second part are connected sequentially along the circumference of the second conductive segment 34. In the unlocked state, the weak portion 6111 can bend and deform around the rotation axis under external force, and can recover its deformation after the external force is removed. The extension direction of the rotation axis is parallel to the extension direction of the second conductive segment 34.

[0135] The weak portion 6111 has a lower strength than the first and second portions, allowing it to bend and deform around the rotation axis under external force. The circumferential direction of the second conductive segment 34 refers to the direction surrounding its central axis. The weak portion 6111 can be connected to the first and second portions by welding, bonding, snap-fitting, or other methods, or it can be integrally formed. As an example, if the weak portion 6111 is integrally formed with both the first and second portions, then the enclosure 61 is an integrally formed structure. The rotation axis and the central axis of the second conductive segment 34 are both virtual lines and parallel to each other, not shown in the figure.

[0136] In its natural state, the weak part 6111 is not subjected to external force, and the first and second parts are interlocked. During assembly, after the locking structure 62 switches to the unlocked state, an external force is applied to the first part. This force is transmitted to the weak part 6111, causing it to bend and deform. This, in turn, causes the first part to move, gradually increasing the opening of the second part until the second part is open enough to allow the second conductive segment 34 to pass through. When the second conductive segment 34 is placed behind the second part and the first part is released, the external force applied to the weak part 6111 is removed. The weak part 6111 returns to its original deformation and causes the first part to close to the open position of the second part.

[0137] This technical solution utilizes the ability of the enclosure 61 to bend and deform or recover its original shape, allowing the enclosure 61 to act as a rotating part to drive the first part to rotate. Thus, during assembly, when the second conductive segment 34 is placed after the second part, the enclosure 61 can automatically drive the first part to rotate by recovering its original shape.

[0138] The specific ways to make the strength of the weak part 6111 lower than that of the first part and the second part are also varied. A groove 6110, a through hole or other structure can be opened in a predetermined area of ​​the enclosure 61 to reduce the strength of the local position of the enclosure 61, thereby forming a weak part 6111 on the enclosure 61.

[0139] According to some embodiments of this application, the enclosure 61 may include a plurality of wall portions 611, one of which is provided with a groove 6110, and a weak portion 6111 is formed at the location where the groove 6110 is provided. In the locked state, the plurality of wall portions 611 are connected end to end in sequence and together enclose the receiving space.

[0140] The enclosure 61 may include three, four, five, or more wall portions 611. As an example, when the enclosure 61 has three wall portions 611, in the locked state, the cross-sectional shape of the enclosure 61 along the extension direction perpendicular to the second conductive segment 34 may be triangular. As an example, such as... Figure 11 As shown, when the enclosure 61 has four wall portions 611, in the locked state, the cross-sectional shape of the enclosure 61 along the extension direction perpendicular to the second conductive segment 34 can be quadrilateral. And so on, which will not be elaborated further in this embodiment.

[0141] In the example where the enclosure 61 has four wall portions 611, for clarity, the four wall portions 611 are referred to as the first wall portion 611a, the second wall portion 611b, the third wall portion 611c, and the fourth wall portion 611d. In the locked state, the first wall portion 611a and the second wall portion 611b are arranged at an angle and directly fixedly connected; the second wall portion 611b and the third wall portion 611c are arranged at an angle and directly fixedly connected; the third wall portion 611c and the fourth wall portion 611d are arranged at an angle and directly fixedly connected; the first wall portion 611a and the fourth wall portion 611d are arranged at an angle but are not directly fixedly connected. Figure 11 In this configuration, the first wall portion 611a is located below the third wall portion 611c, and the second wall portion 611b is located to the left of the fourth wall portion 611d. A groove 6110 is formed in a portion of the second wall portion 611b, creating a weak portion 6111 at the location of the groove 6110. In this example, the portions of the first wall portion 611a and the second wall portion 611b adjacent to the first wall portion 611a without the groove 6110 together form the second portion, while the portion of the second wall portion 611b adjacent to the third wall portion 611c without the groove 6110, the third wall portion 611c, and the fourth wall portion 611d together form the first portion. The channel 6120 can be formed in the first wall portion 611a, or it can be provided in the second wall portion 611b. In some embodiments, a through hole penetrating the thickness of the wall portion 611 can be formed in a portion of the wall portion 611, serving as the channel 6120. In some embodiments, such as... Figure 11 As shown, the insulating protective sleeve 60 may also include a cylindrical wall 612, which extends along a first direction and is fixedly connected to the first wall portion 611a. Part of the cylindrical wall 612 is located inside the receiving space and part is located outside the receiving space. The space enclosed by the inner surface of the cylindrical wall 612 is the channel 6120.

[0142] In conjunction with the foregoing description, in some embodiments, the cross-sectional shape of the enclosure 61 along the extension direction perpendicular to the second conductive segment 34 may also be circular, and correspondingly, the first part and the second part are arc-shaped. As an example, the enclosure 61 is a one-piece molded structure, with a circular cross-sectional shape along the extension direction perpendicular to the second conductive segment 34 and a break in the circumferential direction. A groove 6110 is formed in a localized area of ​​the enclosure 61 to create a weak portion 6111. The weak portion 6111 and the break divide the enclosure 61 into a first part and a second part.

[0143] There are various ways to implement the locking structure 62, and the embodiments of this application do not impose specific limitations on it.

[0144] According to some embodiments of this application, such as Figure 11As shown, the locking structure 62 may include a latch 622 and a latch 621, which can engage or disengage. The latch 622 is connected to one of the first part and the second part, and the latch 621 is located in the other of the first part and the second part.

[0145] As an example, such as Figure 11 As shown, the first part has a latch 621, and the second part is connected to a buckle 622. As an example, the second part has a latch 621, and the first part is connected to a buckle 622. Taking a enclosure 61 with four wall sections 611 as an example, in... Figure 11 In the first wall portion 611a, a buckle 622 is fixedly connected, and the fourth wall portion 611d is provided with a latch 621 that matches the buckle 622. The buckle 622 includes a connecting arm 6221 and a latching head 6222. One end of the connecting arm 6221 is connected to the first wall portion 611a, and the other end is connected to the latching head 6222. The latching head 6222 engages with the latch 621.

[0146] In this embodiment, the locking structure 62 is implemented as a snap-fit ​​structure, so that by engaging or disengaging the snap-fit ​​622 with the latch 621, the locking structure 62 can be easily switched between the locked state and the unlocked state.

[0147] According to some embodiments of this application, the inner cavity 413 may have an opening at one end away from the bottom wall 220 along the first direction, the insulating protective sleeve 60 is covered by the opening, and the triggering component 50 extends into the inner cavity 413 through the opening.

[0148] exist Figure 6 In the middle, the end of the inner cavity 413 that is away from the bottom wall 220 along the first direction refers to the upper end of the inner cavity 413, and the triggering component 50 extends into the inner cavity 413 from the opening on the upper side of the insulating water collection box 40.

[0149] Of course, in other embodiments of this application, the insulating water collection box 40 may include a box body 41 and a box cover, the inner surface of the box body 41 enclosing an inner cavity 413, the box cover closing onto the opening, and the insulating protective sleeve 60 abutting against the surface of the box cover opposite to the inner cavity 413. In contrast, in the embodiment where the insulating protective sleeve 60 is disposed over the opening, the insulating protective sleeve 60 serves multiple purposes.

[0150] Figure 12 for Figure 5 The diagram shows a front view of the structure. Please refer to some embodiments of this application. Figure 5 and Figure 6 The insulating water collection box 40 can be configured to include a box body 41 and a lug 42, the inner surface of the box body 41 forming an inner cavity 413, and the lug 42 and the box body 41 facing one end of the manifold 30 in a first direction. Figure 6 The upper part (middle) is connected, and the lug 42 is fixedly connected to the housing 22. For example... Figure 12 As shown, the battery device may also include a binding strap 80, through which the first conductive segment 33 is bound and fixed to the lug 42.

[0151] The box body 41 can be of various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. In some embodiments, an opening is formed at the top of the box body 41, thus the upper end of the inner cavity 413 has an opening. The lugs 42 can be annular structures surrounding the entire circumference of the box body 41, or there can be multiple lugs 42 spaced apart circumferentially around the box body 41. Figure 5 and Figure 6 In the middle, the insulating water collection box 40 is provided with two lugs 42. The lugs 42 can protrude radially along the box body 41, where radial refers to the direction perpendicular to the central axis of the box body 41.

[0152] In some embodiments, the lug 42 can be connected to the housing 22 by welding, bonding, snap-fitting, screwing, or other methods. In some embodiments, the lug 42 can be fixedly connected to the bottom wall 220, side wall, or components within the electrical compartment 225. For example, Figure 3 As shown, a bracket 226 is fixedly mounted on the bottom wall 220 of the electrical compartment 225, and the lug 42 is connected to the bracket 226.

[0153] The binding strap 80 can be implemented as a cable tie, rope, flexible chain, or other means known in the art. As an example, in Figure 6 In this device, there are two lugs 42 and two binding straps 80. Each lug 42 has two through holes 4211. Each binding strap 80 passes from the bottom of the lug 42 through one through hole 4211 on the corresponding lug 42 to the top of the lug 42. Then, it wraps around from one side of the first conductive segment 33 in the width direction to the other side of the first conductive segment 33 in the width direction, and then passes through the other through hole 4211 on the corresponding lug 42 to the bottom of the lug 42 for fixation. In this way, the first conductive segment 33 is bound and fixed to the lug 42.

[0154] The insulating water collection box 40 includes a box body 41 and lugs 42. The box body 41 stores liquid to form a water inlet detection space, and the lugs 42 are responsible for fixing the box body 41 and the busbar 30. In this embodiment, the first conductive segment 33 is tied to the lugs 42 using a binding strap 80. This provides flexible constraint while ensuring the fixation of the first conductive segment 33. Under conditions such as vibration and impact, the binding strap 80 will not transmit stress like rigid connections such as bolts or welds. Moreover, this method has high assembly efficiency and the binding strap 80 can be disassembled for easy maintenance of the busbar 30.

[0155] According to some embodiments of this application, please refer to Figure 5 and Figure 6 The lug 42 may include a body 421 and a protrusion 422. The protrusion 422 protrudes from the surface of the body 421 away from the bottom wall 220. The protrusion 422 is fixedly connected to the housing 22 by a fastener 70 (such as a screw or bolt). The fastener 70 extends along a first direction, and the head 71 of the fastener 70 is located on the side of the protrusion 422 away from the bottom wall 220. The first conductive segment 33 may be configured to include a straight segment 331 and a bent segment 332. The extension direction of the straight segment 331 is parallel to the extension direction of the second conductive segment 34. The straight segment 331 is opposite to the body 421 and fixed to the lug 42. The bent segment 332 has a first end and a second end arranged sequentially along the extension direction. The first end is connected to the second conductive segment 34 through the straight segment 331. From the first end to the second end, the bent segment 332 bends and extends to the side of the head 71 away from the bottom wall 220. Figure 5 (The middle is the upper side) and is spaced apart from the head 71 along the first direction.

[0156] exist Figure 5 and Figure 6 In this embodiment, the protrusion 422 protrudes from the upper surface of the body 421, and the head 71 of the fastener 70 is located above the protrusion 422. In this example, the perforation 4211 is provided on the body 421, and the binding strap 80 binds and fixes the first conductive segment 33 to the body 421.

[0157] The straight segment 331 has no bends and extends linearly along the extension direction of the second conductive segment 34. The bent segment 332 has at least one bend. Figure 3 , Figure 5 and Figure 6 In this configuration, busbar 30 has two first conductive segments 33, and a second conductive segment 34 connects the two first conductive segments 33. The second end of one of the first conductive segments 33 is located above the expansion beam 223 to be electrically connected to the total positive or negative output terminal of the battery cell assembly. The second end of the other first conductive segment 33 is located above the reinforcing beam 224 (see below) to be electrically connected to high-voltage electrical components within another electrical compartment 225. To facilitate extension above the expansion beam 223, at least a portion of the bent section 332 of one of the first conductive segments 33 extends gradually away from the bottom wall 220. Similarly, to facilitate extension above the reinforcing beam 224, at least a portion of the bent section 332 of the other first conductive segment 33 extends gradually away from the bottom wall 220. Figure 6 In the middle, each first conductive segment 33 extends upward twice from the first end to the second end.

[0158] In some embodiments, from the first end to the second end, the bent segment 332 may extend to the upper side of the head 71 in a manner inclined to the upper surface of the body 421. Alternatively, from the first end to the second end, the bent segment 332 may first extend vertically upward to the upper side of the head 71, and then extend horizontally.

[0159] In some embodiments, the straight section 331 of the second conductive segment 34 may abut against the body 421. In some embodiments, the insulating protective sleeve 60 further includes two end walls, which are connected to the surrounding wall 61 and are disposed opposite to each other along the extending direction of the second conductive segment 34. In this embodiment, as shown... Figure 12 As shown, the straight section 331 of the second conductive section 34 abuts against the end wall.

[0160] On the one hand, this embodiment includes a straight section 331 in the first conductive segment 33, and the straight section 331 is bound and fixed to the body 421 by a binding strap 80. This makes the constraint of the binding strap 80 on the first conductive segment 33 more stable, which helps to improve the stability of the busbar 30. On the other hand, this embodiment provides a bent section 332 that extends from the first end to the second end to the side of the head 71 away from the bottom wall 220. This not only makes it easier for the busbar 30 to extend to the location of the battery cell or high-voltage electrical components, but also provides operating space and force application space for the installation of the fastener 70.

[0161] In some embodiments, the battery device may further include a reinforcing beam 224 located on the side of the expansion beam 223 away from the battery cell. The reinforcing beam 224 is connected to the frame 222 and divides the space within the housing 22 on the side of the expansion beam 223 away from the battery cell into multiple electrical compartments 225. A gap exists between the reinforcing beam 224 and the bottom wall 220 of the housing 22, and a sealant 90 is provided between the expansion beam 223 and the bottom wall 220 of the housing 22. Thus, the gap connects two adjacent electrical compartments 225, allowing the multiple electrical compartments 225 to communicate with each other, while the sealant 90 seals the gap between the expansion beam 223 and the bottom wall 220 of the housing 22, preventing communication between the battery compartments and the electrical compartments 225. In this example, the insulating water collection box 40 can be arranged within any one of the electrical compartments 225. In practical applications, if liquid enters any electrical compartment 225, since all electrical compartments 225 are interconnected, the liquid can flow through the gaps to the electrical compartment 225 where the insulating water collection box 40 is located, thus ensuring that water ingress detection of all electrical compartments 225 can be effectively achieved. This reduces the risk that some electrical compartments 225 may be infiltrated but not detected.

[0162] Compared to technical solutions where electrolyte can flow into the battery compartment and electrical compartment 225, in this embodiment, the battery compartment and electrical compartment 225 are isolated from each other. When electrolyte leakage occurs in a single battery cell, the electrolyte leaks into the battery compartment instead of flowing into the electrical compartment 225. The electrolyte in the battery compartment can more easily trigger the casing 22 to become energized. This allows the battery management system to detect the energized casing 22 earlier and issue an alarm signal, enabling the user to handle the situation promptly. This reduces the amount of electrolyte leakage and mitigates the chain reaction caused by excessive electrolyte leakage.

[0163] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0164] The electrical equipment includes vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc. It is understood that the electrical equipment provided in this application, by employing any of the aforementioned battery devices, possesses all the beneficial effects of those battery devices, which will not be elaborated further here.

[0165] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device described in the above embodiments, the battery device being used for energy storage.

[0166] Energy storage devices can include, but are not limited to, centralized energy storage devices (such as containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, wearable energy storage devices, and so on.

[0167] It is understood that the energy storage device provided in this application, by using any of the aforementioned battery devices, has all the beneficial effects of the aforementioned battery devices, which will not be elaborated here.

[0168] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0169] A specific embodiment of this application is described below. It should be understood that this specific embodiment is described for illustrative purposes only and should not be construed as limiting the scope of this application.

[0170] Please see Figures 3 to 12The battery device in this embodiment includes a housing 22, a busbar 30, and a liquid ingress detection mechanism. The liquid ingress detection mechanism includes an insulating water collection box 40, metal screws, an insulating protective sleeve 60, and an insulation detection component. The housing 22 includes a liquid cooling plate 221 and a frame 222. The liquid cooling plate 221 is located on one side of the frame 222 and is fixedly connected to the frame 222. The liquid cooling plate 221 is used to support the battery cells. An expansion beam 223 and a reinforcing beam 224 are provided inside the housing 22. The expansion beam 223 and the reinforcing beam 224 divide the internal space of the housing 22 into a battery compartment and two electrical compartments 225. A sealant 90 is provided between the expansion beam 223 and the bottom wall 220 of the housing 22. There is a gap between the reinforcing beam 224 and the bottom wall 220 of the housing 22. The two electrical compartments 225 are connected through the gap.

[0171] One of the electrical compartments 225 has a portion of its bottom wall 220 without insulation material, forming a conductive area 2200, and the bottom wall 220 of the electrical compartment 225 is provided with a support 226. The insulating water collection box 40 includes a box body 41 and a lug 42 connected to the top of the box body 41. The top of the box body 41 has an opening, and the side wall of the box body 41 has a liquid inlet hole 412 communicating with the electrical compartment 225. The bottom plate 414 of the box body 41 has a through hole 4143. A flexible sealing ring 91 is provided between the bottom plate 414 of the box body 41 and the bottom wall 220 of the electrical compartment 225. The through hole 4143 and the center hole of the flexible sealing ring 91 are directly opposite the conductive area 2200. The busbar 30 includes a first conductive segment 33 and a second conductive segment 34 connected together. A second insulating layer 35 is provided on the circumferential side of the first conductive segment 33. The first conductive segment 33 is secured to the lug 42 by a binding strap 80. The second conductive segment 34 does not have a second insulating layer 35 on its circumferential side. An insulating protective sleeve 60 is fitted around the outer periphery of the second conductive segment 34. A metal screw is screwed to the second conductive segment 34 and extends into the interior of the housing 41 through the top opening, with the bottom end of the metal screw located below the liquid inlet 412. An insulation detection component is electrically connected to the housing 22 and is used to detect the potential of the housing 22.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure includes an electrical compartment, the bottom wall of which includes a conductive area; The busbar is located, at least partially, within the electrical compartment; A liquid ingress detection mechanism includes an insulating water collection box, a triggering component, and an insulation detection component. The insulating water collection box is fixedly installed inside the electrical compartment. The insulating water collection box has an inner cavity and a liquid ingress hole. The inner cavity communicates with the electrical compartment through the liquid ingress hole. The triggering component is a conductor and is electrically connected to the busbar. At least a portion of the triggering component is located in the inner cavity. The surface of the triggering component facing the bottom wall is a first surface. The minimum distance between the first surface and the bottom surface of the inner cavity along a first direction is less than the minimum distance between the liquid ingress hole and the bottom surface of the inner cavity along the first direction. The triggering component is configured to trigger the busbar and the conductive area to be energized when the liquid level in the inner cavity is not lower than the first surface. The insulation detection component is electrically connected to the housing and is used to detect the potential of the housing. The first direction is the thickness direction of the bottom wall.

2. The battery device according to claim 1, characterized in that, The insulating water collection box includes a base plate, which is disposed opposite to the bottom wall. The base plate is provided with a through hole that penetrates its own thickness. The orthogonal projection of the through hole along the first direction onto the bottom wall at least partially coincides with the conductive area.

3. The battery device according to claim 2, characterized in that, The base plate has a recessed portion that is recessed into the inner cavity; the battery device also includes a flexible sealing ring, which is accommodated in the recessed portion and disposed between the base plate and the bottom wall. The flexible sealing ring is used to seal the gap between the base plate and the bottom wall, and the central hole of the flexible sealing ring is opposite to and communicates with the through hole.

4. The battery device according to claim 1, characterized in that, The housing includes a liquid cooling plate and a frame. The liquid cooling plate is located on one side of the frame and is fixedly connected to the frame. The liquid cooling plate is used to support the battery cell and the insulating water collection box. The surface of the liquid cooling plate facing the insulating water collection box includes an insulating material covered area and an exposed area. The insulating material covered area is covered with a first insulating layer, and the exposed area serves as the conductive area.

5. The battery device according to any one of claims 1 to 4, characterized in that, The busbar is located outside the insulating water collection box. The busbar includes a first conductive segment and a second conductive segment connected together. The circumferential side of the first conductive segment is covered with a second insulating layer. The first conductive segment is fixedly connected to the insulating water collection box, and the second conductive segment is electrically connected to the triggering component.

6. The battery device according to claim 5, characterized in that, The liquid ingress detection mechanism further includes an insulating protective sleeve fitted around the outer periphery of the second conductive segment. The insulating protective sleeve has a receiving space and a channel. The receiving space is open at both ends along the extension direction of the second conductive segment. A portion of the triggering component is located within the receiving space, and the triggering component is inserted into the channel.

7. The battery device according to claim 6, characterized in that, The insulating protective sleeve includes a enclosure and a locking structure. The enclosure includes a first part and a second part. The locking structure has a locked state and an unlocked state. In the locked state, the first part and the second part are fixed to each other by the locking structure, and the first part and the second part interlock and enclose the receiving space. In the unlocked state, the first part is movable relative to the second part to open the second part, and the second conductive segment is able to pass through the open position of the second part.

8. The battery device according to claim 7, characterized in that, The enclosure is provided with a weak part, and the first part, the weak part and the second part are connected in sequence along the circumference of the second conductive segment; in the unlocked state, the weak part can bend and deform around the rotation axis under external force, and can recover its deformation after the external force is removed, and the extension direction of the rotation axis is parallel to the extension direction of the second conductive segment.

9. The battery device according to claim 8, characterized in that, The enclosure includes multiple wall portions, one of which has a groove, and the weak portion is formed at the location where the groove is provided; in the locked state, the multiple wall portions are connected end to end in sequence and together enclose the receiving space.

10. The battery device according to claim 7, characterized in that, The locking structure includes a buckle and a latch, the buckle and the latch being able to engage or disengage; the buckle is connected to one of the first part and the second part, and the latch is located in the other of the first part and the second part.

11. The battery device according to claim 6, characterized in that, The inner cavity has an opening at one end opposite to the bottom wall along the first direction, the insulating protective sleeve is covered by the opening, and the triggering component extends into the inner cavity through the opening.

12. The battery device according to claim 5, characterized in that, The insulating water collection box includes a box body and a lug. The inner surface of the box body surrounds the inner cavity. The lug is connected to one end of the box body facing the busbar along the first direction. The lug is fixedly connected to the box body. The battery device also includes a binding strap, through which the first conductive segment is bound and fixed to the lug.

13. The battery device according to claim 12, characterized in that, The lug includes a body and a protrusion. The protrusion protrudes from the surface of the body away from the bottom wall. The protrusion is fixedly connected to the housing by a fastener. The fastener extends along the first direction, and the head of the fastener is located on the side of the protrusion away from the bottom wall. The first conductive segment includes a straight segment and a bent segment. The extension direction of the straight segment is parallel to the extension direction of the second conductive segment. The straight segment is opposite to the body and fixed to the lug. The bent segment has a first end and a second end arranged sequentially along the extension direction. The first end is connected to the second conductive segment through the straight segment. From the first end to the second end, the bent segment bends and extends to the side of the head away from the bottom wall and is spaced apart from the head along the first direction.

14. An electrical appliance, characterized in that, The electrical equipment includes a battery device as claimed in any one of claims 1 to 13, the battery device being used to provide electrical energy.

15. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1 to 13, the battery device being used to store electrical energy.

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