Battery device, electric device and manual maintenance switch

Abstract

The embodiment of the utility model provides a battery device, a power utilization device and a manual maintenance switch. The battery device comprises a battery monomer, a box body and a manual maintenance switch, wherein the box body accommodates the battery monomer. The manual maintenance switch comprises a first mounting seat and a cover body, the first mounting seat is connected to the box body, the cover body is connected to the first mounting seat in a pluggable mode, and the cover body and the first mounting seat jointly define a cavity. The manual maintenance switch further comprises a ventilation mechanism, the first mounting seat and / or the cover body are / is provided with a through hole, the ventilation mechanism blocks the through hole, and the ventilation mechanism is configured to allow gas in the cavity to be discharged out of the cavity through the through hole. Therefore, in the process that the cover body is inserted into the first mounting seat, gas in the cavity is exhausted from the through hole through the ventilation mechanism, so that the internal pressure and the external pressure of the cavity are balanced, and the cover body can be smoothly inserted into the first mounting seat.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery device technology is an important factor related to their development. At present, higher requirements are put forward for the reliability of battery devices. Summary of the Utility Model

[0003] The present application provides a battery device, an electrical device, and a manual maintenance switch to improve the reliability of the battery device.

[0004] The present application is implemented through the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a battery device, including battery cells, a box body, and a manual maintenance switch. The box body houses the battery cells; the manual maintenance switch includes a first mounting seat and a cover body. The first mounting seat is connected to the box body, and the cover body is detachably connected to the first mounting seat. The cover body and the first mounting seat jointly define a cavity; wherein, the manual maintenance switch further includes a ventilation mechanism. The first mounting seat and / or the cover body is provided with a through hole, and the ventilation mechanism plugs the through hole. The ventilation mechanism is configured to allow the gas in the cavity to be discharged from the cavity through the through hole.

[0006] By providing a through hole in the first mounting seat and / or the cover body, plugging the through hole with the ventilation mechanism, and configuring the ventilation mechanism to allow the gas in the cavity to be discharged from the cavity through the through hole, during the process of inserting the cover body into the first mounting seat, the gas in the cavity can be discharged from the through hole in time through the ventilation mechanism, so as to balance the pressure inside and outside the cavity, thereby enabling the cover body to be smoothly inserted in place to conduct the high-voltage circuit, thus improving the reliability of the battery device.

[0007] In some embodiments, the ventilation mechanism includes a ventilation membrane that covers the through hole.

[0008] By covering the through hole with the ventilation membrane, during the process of inserting the cover body into the first mounting seat, not only can the gas be exhausted, but also sundries can be blocked, further improving the reliability of the battery device.

[0009] In some embodiments, the ventilation membrane is located inside the cavity.

[0010] The ventilation membrane is located inside the cavity, which can protect the ventilation membrane and enable the ventilation membrane to stably and reliably perform its function, further improving the reliability.

[0011] In some embodiments, the breathable membrane is a semi-permeable membrane that is breathable and waterproof.

[0012] The semi-permeable membrane allows gas to pass through while preventing liquid from passing through. It can not only perform its exhaust function but also block liquid from entering the cavity, reducing the risk of short circuit of the conductive components in the cavity and further improving reliability.

[0013] In some embodiments, the semi-permeable membrane is any one of polytetrafluoroethylene membrane, polyurethane membrane, polyester membrane, polyethylene membrane, and polypropylene membrane.

[0014] The above semi-permeable membranes are common semi-permeable membranes on the market, which are convenient for obtaining materials and saving costs.

[0015] In some embodiments, the breathable membrane is heat-melt connected or bonded to the first mounting seat.

[0016] Through heat-melt connection, the breathable membrane can be fused with the first mounting seat and / or the cover body to improve the connection reliability. Through bonding, it is convenient for installation and reduces costs.

[0017] In some embodiments, the through-hole is provided in the first mounting seat, the box body has a storage space for storing the battery cell, and the through-hole communicates the storage space and the cavity.

[0018] Thus, by communicating the storage space and the cavity through the through-hole, the gas discharged from the cavity enters the storage space, so that the through-hole and the breathable mechanism are not exposed outside the box body, which can better protect the breathable mechanism and prevent external moisture, debris, etc. from entering the cavity through the through-hole, improving reliability.

[0019] In some embodiments, the through-hole is provided in the cover body, and the breathable mechanism is configured to allow the gas in the cavity to be discharged to the outside of the box body through the through-hole.

[0020] Thus, the pressure difference inside and outside the cavity can be quickly balanced, thereby solving the problem of difficult plugging and unplugging.

[0021] In some embodiments, the manual maintenance switch further includes a first connection terminal and a second connection terminal. Both the first connection terminal and the second connection terminal are provided on the first mounting seat. The first connection terminal is electrically connected to the battery cell. The cover body is provided with a conductive component, and the conductive component is configured to electrically connect the first connection terminal and the second connection terminal when the cover body is connected to the first mounting seat; the battery device further includes: a first connector, including a second mounting seat and a third connection terminal. The third connection terminal is provided on the second mounting seat, and the third connection terminal is electrically connected to the second connection terminal. The second mounting seat and the first mounting seat are integrally formed.

[0022] The second mounting seat and the first mounting seat are integrally formed, which can simplify the process and reduce costs.

[0023] In some embodiments, the battery device further includes: a sampling component for collecting information of the battery cell; a second connector including a third mounting seat and a fourth connection terminal, the fourth connection terminal is disposed on the third mounting seat, the fourth connection terminal is electrically connected to the sampling component, and the third mounting seat, the second mounting seat and the first mounting seat are integrally formed.

[0024] By integrally forming the first mounting seat of the manual maintenance switch, the second mounting seat of the first connector, and the third mounting seat of the second connector, the assembly efficiency can be increased and the installation is facilitated.

[0025] In some embodiments, the box body has a storage space for storing the battery cell, the box body includes a first wall, the first wall is provided with an opening, and the opening communicates with the through hole and the storage space; the first mounting seat, the second mounting seat and the third mounting seat are integrally formed to form a panel, and the panel is connected to the first wall and covers the opening.

[0026] By integrally forming the first mounting seat, the second mounting seat and the third mounting seat to form a panel, the installation is convenient, and the sealing interface can be reduced, thereby improving the sealing effect.

[0027] In some embodiments, the battery device further includes: a sealing member disposed between the panel and the first wall and surrounding the opening.

[0028] Since the first mounting seat, the second mounting seat and the third mounting seat are integrally formed to form a panel, the sealing interface is reduced, and the sealing between the panel and the first wall can be achieved through one sealing member, thereby reducing costs.

[0029] In a second aspect, an electrical device provided by an embodiment of the present application further includes the battery device provided by any one of the embodiments in the first aspect.

[0030] In a third aspect, an embodiment of the present application further provides a manual maintenance switch, including a first mounting seat and a cover body, the cover body is detachably connected to the first mounting seat, and the cover body and the first mounting seat jointly define a cavity; wherein, the manual maintenance switch further includes a ventilation mechanism, the first mounting seat and / or the cover body is provided with a through hole, and the ventilation mechanism plugs the through hole, and the ventilation mechanism is configured to allow the gas in the cavity to be discharged from the cavity through the through hole.

[0031] In some embodiments, the ventilation mechanism includes a ventilation membrane covering the through hole.

[0032] In some embodiments, the through-hole is located within the cavity.

[0033] In some embodiments, the breathable membrane is a semi-permeable membrane that is breathable and waterproof.

[0034] In some embodiments, the breathable membrane is heat-sealed or adhesively bonded to the first mounting base.

[0035] The above description is only an overview of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically describes the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0037] Figure 1 Structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0038] Figure 2 Exploded structural schematic diagram of a battery device provided by some embodiments of the present application;

[0039] Figure 3 Exploded structural schematic diagram of a battery cell provided by some embodiments of the present application;

[0040] Figure 4 Structural schematic diagram of the connection between a manual maintenance switch and a box body provided by some embodiments of the present application;

[0041] Figure 5 Structural schematic diagram of a manual maintenance switch provided by some embodiments of the present application;

[0042] Figure 6 Top view of a manual maintenance switch provided by some embodiments of the present application;

[0043] Figure 7 Top view of a manual maintenance switch with the cover removed provided by some embodiments of the present application;

[0044] Figure 8 Partial cross-sectional schematic diagram provided by some embodiments of the present application, which shows the structure of the breathable membrane covering the through-hole.

[0045] ICON:

[0046] 1000 - Vehicle; 100 - Battery device; 200 - Controller; 300 - Motor;

[0047] 10 - Box body; 11 - First sub - box body; 12 - Second sub - box body; 101 - Storage space; 102 - First wall;

[0048] 20 - Battery cell; 21 - Outer shell; 22 - Electrode assembly; 222 - Tab; 23 - Electrode terminal; 211 - Housing; 212 - End cap;

[0049] 30 - Manual maintenance switch; 31 - First mounting seat; 32 - Cover body; 33 - Ventilation mechanism; 34 - Through - hole; 30a - Cavity; 35 - First connection terminal; 36 - Second connection terminal; 37 - First connector; 371 - Second mounting seat; 38 - Second high - voltage connector; 39 - Second connector; 391 - Third mounting seat; 392 - Fourth connection terminal. Detailed implementation mode

[0050] The following further describes the implementation mode of the present application in detail with reference to the drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principle of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0051] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification of the present application are intended to cover non - exclusive inclusion.

[0052] The terms "first", "second", etc. in the specification of the present application are used to distinguish different objects, rather than to describe a specific order or primary - secondary relationship.

[0053] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in combination with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0054] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0055] In the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally indicates that the front and rear associated objects are in an "or" relationship.

[0056] In the present application, "a plurality of" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of sheets" means two or more sheets (including two sheets).

[0057] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0058] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by tying a plurality of battery cells with a cable tie.

[0059] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assembly is accommodated in the box body.

[0060] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0061] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0062] As an example, the box body may include a first sub-box body and a second sub-box body. The first sub-box body and the second sub-box body are snapped together so that a closed space is formed inside the box body to accommodate the battery cell assembly. Here, "closed" means covered or closed, which can be sealed or non-sealed. The first sub-box body can be a top cover or a bottom plate.

[0063] As an example, the first sub - box body and the second sub - box body can be U - shaped structures respectively, and the two are buckled with each other so that the two U - shaped structures form a closed space.

[0064] As an example, the box body can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0065] As an example, the box body can be part of the chassis structure of a vehicle. For example, the top cover of the box body can become at least part of the floor of the vehicle, or the frame of the box body can become at least part of the cross - beam and longitudinal beam of the vehicle.

[0066] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box body, and at least one side of the box body is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0067] In the embodiments of the present application, the battery cell can be a secondary battery, and the secondary battery refers to a battery cell that can activate the active material through charging after discharging the battery cell and continue to be used.

[0068] The battery cell can be, but is not limited to, a lithium - ion battery, a sodium - ion battery, a sodium - lithium - ion battery, a lithium - metal battery, a sodium - metal battery, a lithium - sulfur battery, a magnesium - ion battery, a nickel - metal hydride battery, a nickel - cadmium battery, a lead - acid battery, etc.

[0069] A manual service disconnect (MSD) is usually designed in the battery device. The manual service disconnect can include a mounting seat and a cover body (handle). The cover body is detachably connected to the mounting seat to form a sealed cavity for protecting the internal conductive structure. When the cover body is pulled out from the mounting seat, the high - voltage circuit is disconnected, and when the cover body is inserted into the mounting seat, the high - voltage circuit is conducted. Among them, during the process of inserting the cover body into the mounting seat, there is a pressure difference between the gas in the cavity and the outside gas, which is likely to cause difficulty in insertion, resulting in the situation that the cover body is not inserted in place, so that the conduction of the high - voltage circuit is unreliable, and further resulting in poor reliability of the battery device.

[0070] To solve the problem that the cover body of the manual service disconnect is not inserted in place into the mounting seat, resulting in poor reliability of the battery device, the present application provides a battery device. By providing through - holes in the mounting seat and / or the cover body, and blocking the through - holes through a ventilation mechanism, the ventilation mechanism is configured to allow the gas in the cavity to be discharged from the cavity through the through - holes, so that during the process of inserting the cover body into the mounting seat, the gas in the cavity can pass through the ventilation mechanism and be discharged from the through - holes in time, so as to balance the pressure inside and outside the cavity. Thus, the cover body can be smoothly inserted into the mounting seat and inserted in place, reliably conducting the high - voltage circuit, thereby improving the reliability of the battery device.

[0071] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in electrical devices such as vehicles, ships or aircraft. The power supply system of the electrical device can be composed of the battery device disclosed in the present application.

[0072] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, power tools, vehicles, ships and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles and spaceships, etc.

[0073] For the convenience of description, the following embodiments take a vehicle as an example of an electrical device in an embodiment of the present application for illustration.

[0074] Refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be disposed at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000 and be used for the circuit system of the vehicle 1000, such as the working power consumption requirements for starting, navigating and running of the vehicle 1000.

[0075] The vehicle 1000 may further 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, such as for the working power consumption requirements for starting, navigating and driving of the vehicle 1000.

[0076] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0077] Refer to Figure 2 , Figure 2Exploded view of the structure of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a box body 10 and battery cells 20, and the battery cells 20 are accommodated in the box body 10. Among them, the box body 10 is used to provide a accommodation space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first sub-box body 11 and a second sub-box body 12, the first sub-box body 11 and the second sub-box body 12 are covered with each other, and the first sub-box body 11 and the second sub-box body 12 jointly define a storage space 101 for accommodating the battery cells 20. The second sub-box body 12 may be a hollow structure with an open end, and the first sub-box body 11 may be a plate-like structure. The first sub-box body covers the open side of the second sub-box body 12 so that the first sub-box body 11 and the second sub-box body 12 jointly define an accommodation space; the first sub-box body 11 and the second sub-box body 12 may also both be hollow structures with an open side, and the open side of the first sub-box body 11 covers the open side of the second sub-box body 12.

[0078] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, parallel or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, parallel or in a mixed connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box body 10; of course, the battery device 100 can also be that multiple battery cells 20 are first connected in series, parallel or in a mixed connection to form a battery module form, and then multiple battery modules are connected in series, parallel or in a mixed connection to form a whole and are accommodated in the box body 10. The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component for realizing electrical connection between multiple battery cells.

[0079] Refer to Figure 3 , Figure 3 Exploded view of the structure of the battery cell 20 provided by some embodiments of the present application. As Figure 3 shown, the battery cell 20 includes a housing 21, an electrode assembly 22 and other functional components. The housing 21 includes a shell 211 and an end cap 212. The shell 211 has an opening, and the end cap 212 closes the opening to isolate the internal environment of the battery cell 20 from the external environment.

[0080] The housing 211 is a component for cooperating with the end cap 212 to form the internal environment of the battery cell 20, where the formed internal environment can be used to accommodate the electrode assembly 22, the electrolyte, and other components. One or more electrode assemblies 22 may be included within the housing 211. The housing 211 and the end cap 212 may be separate components. The housing 211 may be of various shapes and sizes. Specifically, the shape of the housing 211 may be determined according to the specific shape and size of the electrode assembly. The material of the housing 211 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0081] The end cap 212 is a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 212 may be adapted to the shape of the housing 211 to cooperate with the housing 211. Optionally, the end cap 212 may be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 212 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved reliability. Functional components such as the electrode terminal 23 may be provided on the end cap 212. The electrode terminal 23 may be used for electrically connecting with the tab 222 of the electrode assembly 22 to output or input the electrical energy of the battery cell. The material of the end cap 212 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating structure may be further provided on the inner side of the end cap 212, and the insulating structure may be used to isolate the electrical connection components within the housing from the end cap to reduce the risk of short circuit. Exemplarily, the insulating structure may be plastic, rubber, etc.

[0082] The following refers to Figures 4 to 8 , and the battery device 100 of the embodiments of the present application will be described in detail.

[0083] Figure 4 It is a schematic diagram of the connection structure between the manual maintenance switch and the box body provided by some embodiments of the present application. Figure 5 It is a schematic diagram of the structure of the manual maintenance switch provided by some embodiments of the present application. Figure 6 It is a top view of the manual maintenance switch provided by some embodiments of the present application. Figure 7 It is a top view of the manual maintenance switch with the cover removed provided by some embodiments of the present application. Figure 8 It is a partial cross-sectional schematic diagram provided by some embodiments of the present application, which shows the structure of the breathable membrane covering the through hole.

[0084] The battery device 100 according to the embodiment of the present application includes a battery cell 20, a box body 10, and a manual maintenance switch 30. The box body 10 houses the battery cell 20. The manual maintenance switch 30 includes a first mounting seat 31 and a cover body 32. The first mounting seat 31 is connected to the box body 10, and the cover body 32 is detachably connected to the first mounting seat 31. The cover body 32 and the first mounting seat 31 jointly define a cavity 30a. Wherein, the manual maintenance switch 30 further includes a ventilation mechanism 33. The first mounting seat 31 and / or the cover body 32 is provided with a through hole 34. The ventilation mechanism 33 blocks the through hole 34, and the ventilation mechanism 33 is configured to allow the gas in the cavity 30a to be discharged from the cavity 30a through the through hole 34.

[0085] The manual service disconnect (MSD) 30 is used to cut off or conduct the high-voltage circuit in the battery device 100.

[0086] The first mounting seat 31 can be connected to the box body 10 in a detachable manner. For example, detachable connection can be achieved through bolts, screws, buckles, etc. The first mounting seat 31 can also be fixedly connected to the box body 10 by gluing. The first mounting seat 31 can be connected to any wall of the box body 10. For example, it is connected to the first wall 102 of the box body 10. The first wall 102 can be a side wall of the box body 10. The first wall 102 can be provided with an opening, and the first mounting seat 31 is connected to the first wall 102 and covers the opening. When the cover body 32 is connected to the first mounting seat 31, it can be located outside the box body 10.

[0087] When the cover body 32 is inserted into the first mounting seat 31, the high-voltage circuit is conducted; when the cover body 32 is pulled out from the first mounting seat 31, the high-voltage circuit is disconnected. The cavity 30a jointly defined by the cover body 32 and the first mounting seat 31 can be airtight to prevent liquid, debris, etc. from entering the cavity 30a.

[0088] As an example, a seal is provided between the cover body 32 and the first mounting seat 31 to form an airtight cavity 30a. Of course, the cover body 32 and the first mounting seat 31 can also form an airtight cavity 30a through the interference fit of their own structures.

[0089] During the process of inserting the cover body 32 into the first mounting seat 31, the gas in the cavity 30a defined by the cover body 32 and the first mounting seat 31 is compressed, resulting in an imbalance in air pressure between the inside and outside of the cavity 30a, making it difficult to insert the cover body 32.

[0090] The through hole 34 can be provided only in the first mounting seat 31 or only in the cover body 32. The through hole 34 can also be provided in both the first mounting seat 31 and the cover body 32.

[0091] The ventilation mechanism 33 blocks the through-hole 34, and the ventilation mechanism 33 allows the gas in the cavity 30a to pass through, so that the gas passing through the ventilation mechanism 33 can be discharged from the cavity 30a through the through-hole 34. The ventilation mechanism 33 can be located in the cavity 30a, outside the cavity 30a, or in the through-hole 34. The ventilation mechanism 33 can be a ventilation membrane, a one-way valve, etc.

[0092] During the process of inserting the cover 32 into the first mounting seat 31, due to the existence of the ventilation mechanism 33, the gas inside the cavity 30a can pass through the ventilation mechanism 33, so that the gas passing through the ventilation mechanism 33 can be discharged from the cavity 30a through the through-hole 34, making the air pressure inside the cavity 30a balance with the air pressure outside the cavity 30a, so that the cover 32 can be smoothly inserted into the first mounting seat 31 and can be installed in place.

[0093] The through-hole 34 is provided on the first mounting seat 31 and / or the cover 32, and the ventilation mechanism 33 blocks the through-hole 34. The ventilation mechanism 33 is configured to allow the gas in the cavity 30a to be discharged from the cavity 30a through the through-hole 34, so that during the process of inserting the cover 32 into the first mounting seat 31, the gas in the cavity 30a can be timely discharged from the through-hole 34 via the ventilation mechanism 33 to balance the pressure inside and outside the cavity 30a, thereby enabling the cover 32 to be smoothly inserted in place to reliably conduct the high-voltage circuit, thus improving the reliability of the battery device 100.

[0094] In some embodiments, referring to Figure 7 and Figure 8 , the ventilation mechanism 33 includes a ventilation membrane that covers the through-hole 34.

[0095] The ventilation membrane has micropores for gas to pass through. During the process of inserting the cover 32 into the first mounting seat 31, the gas in the cavity 30a can pass through the micropores, so that the gas passing through the micropores can be discharged from the cavity through the through-hole 34, making the air pressure inside and outside the cavity 30a balance. When the cover 32 is pulled out of the first mounting seat 31, the gas outside the cavity 30a can enter the cavity 30a, and the air pressure inside and outside the cavity 30a can also be balanced. Thus, the insertion and extraction force can be reduced, and the insertion and extraction are smoother.

[0096] The micropores can also reduce the entry of sundries, liquids, etc. into the cavity 30a. The ventilation membrane is light in weight and does not occupy too much space.

[0097] Thus, by covering the through-hole 34 with the ventilation membrane, during the process of inserting the cover 32 into the first mounting seat 31, not only can the gas be exhausted, but sundries, etc. can also be blocked, further improving the reliability of the battery device.

[0098] In some embodiments, the ventilation membrane is located inside the cavity 30a.

[0099] When the through hole 34 is provided in the first mounting base 31, the breathable film can be disposed on the side of the first mounting base 31 close to the cover body 32, so that the breathable film is located within the cavity 30a. When the through hole 34 is provided in the cover body 32, the breathable film can be disposed on the side of the cover body 32 close to the first mounting base 31, so that the breathable film is located within the cavity 30a.

[0100] The breathable film is located within the cavity 30a, which can protect the breathable film and enable the breathable film to stably and reliably perform its air-permeable function, further improving reliability.

[0101] In some embodiments, the breathable film can also be located outside the cavity 30a.

[0102] In some embodiments, the breathable film is a semi-permeable membrane that is breathable and impermeable to water.

[0103] The semi-permeable membrane can be a unidirectional breathable membrane or a bidirectional breathable membrane. The unidirectional breathable membrane allows gas to pass through unidirectionally, thus making the insertion of the cover body 32 smoother. The bidirectional breathable membrane allows gas to pass through bidirectionally, thus making the insertion and extraction of the cover body 32 both smooth.

[0104] The semi-permeable membrane allows gas to pass through and blocks the passage of liquid. It can not only perform its exhaust function, but also prevent liquid from entering the cavity 30a, reducing the risk of short circuit caused by liquid entering the cavity 30a and further improving reliability.

[0105] In some embodiments, the semi-permeable membrane can be any one of a polytetrafluoroethylene membrane, a polyurethane membrane, a polyester membrane, a polyethylene membrane, and a polypropylene membrane.

[0106] The above-mentioned semi-permeable membrane is a common semi-permeable membrane on the market, which is convenient for obtaining materials and saves costs.

[0107] In some embodiments, the breathable film is heat-melt connected or bonded to the first mounting base 31 and / or the cover body 32.

[0108] The breathable film and the first mounting base 31 and / or the cover body 32 can be fused into one body by heating at a high temperature to achieve connection. The breathable film can also be bonded to the first mounting base 31 and / or the cover body 32 by an adhesive.

[0109] Through heat-melt connection, the breathable film and the first mounting base 31 and / or the cover body 32 can be fused into one body, improving the connection reliability. Through adhesive connection, it is convenient for quick installation and reduces costs.

[0110] In some embodiments, the through hole 34 is provided in the first mounting base 31, and the box body 10 has a receiving space 101 ( Figure 2 as shown) for receiving the battery cell 20, and the through hole 34 communicates the receiving space 101 and the cavity 30a.

[0111] During the process of inserting the cover body 32 into the first mounting seat 31, the gas discharged from the cavity 30a enters the storage space 101.

[0112] Thus, the storage space 101 and the cavity 30a are communicated through the through hole 34, and the gas discharged from the cavity 30a enters the storage space 101, so that the through hole 34 and the ventilation mechanism 33 are not exposed outside the box body 10, which can better protect the ventilation mechanism 33 and prevent external moisture, sundries, etc. from entering the cavity 30a through the through hole 34, improving the reliability.

[0113] In some embodiments, the through hole 34 is provided on the cover body 32, and the ventilation mechanism 33 is configured to allow the gas in the cavity 30a to be discharged to the outside of the box body 10 through the through hole 34.

[0114] During the process of inserting the cover body 32 into the first mounting seat 31, the gas discharged from the cavity 30a is discharged to the outside of the box body 10 through the through hole 34.

[0115] Thus, the pressure difference inside and outside the cavity 30a can be quickly balanced, thereby solving the problem of difficult plugging and unplugging.

[0116] In some embodiments, the manual maintenance switch 30 further includes a first connection terminal 35 and a second connection terminal 36. Both the first connection terminal 35 and the second connection terminal 36 are provided on the first mounting seat 31. The first connection terminal 35 is electrically connected to the battery cell 20. The cover body 32 is provided with a conductive member (not shown in the figure), and the conductive member is configured to electrically connect the first connection terminal 35 and the second connection terminal 36 when the cover body 32 is connected to the first mounting seat 31; the battery device 100 further includes: a first connector 37, including a second mounting seat 371 and a third connection terminal (not labeled in the figure). The third connection terminal is provided on the second mounting seat 371, and the third connection terminal is electrically connected to the second connection terminal 36. The second mounting seat 371 is integrally formed with the first mounting seat 31.

[0117] The first connection terminal 35 and the second connection terminal 36 can be in the form of pin structures. Of course, other conductive structures are also possible.

[0118] The first connection terminal 35 is electrically connected to the battery cell 20, and it can be that the first connection terminal 35 is electrically connected to the total output positive electrode of multiple battery cells 20.

[0119] The first connector 37 can be a first high-voltage connector, and the first high-voltage connector connects the second connection terminal 36 and the positive electrode of a high-voltage box (not shown in the figure).

[0120] The battery device 100 may further include a second high-voltage connector 38, and the second high-voltage connector 38 connects the total output negative electrode of multiple battery cells 20 and the negative electrode of the high-voltage box.

[0121] When the cover body 32 is inserted into the first mounting seat 31, the conductive members on the cover body 32 electrically connect the first connection terminal 35 and the second connection terminal 36, so that the battery cell 20, the manual maintenance switch 30, the high-voltage box, the first high-voltage connector, and the second high-voltage connector form a conducting high-voltage loop.

[0122] The second mounting seat 371 is integrally formed with the first mounting seat 31, and can be integrally formed by injection molding or molding.

[0123] The second mounting seat 371 being integrally formed with the first mounting seat 31 can simplify the installation process, achieve quick installation, and reduce costs.

[0124] In some embodiments, the battery device 100 further includes a sampling component (not shown in the figure) for collecting information of the battery cell 20; a second connector 39, including a third mounting seat 391 and a fourth connection terminal 392, the fourth connection terminal 392 is disposed on the third mounting seat 391, the fourth connection terminal 392 is electrically connected to the sampling component, and the third mounting seat 391, the second mounting seat 371, and the first mounting seat 31 are integrally formed.

[0125] The second connector 39 is a low-voltage connector for connecting the sampling component and the battery management system (BMS). The sampling component is a battery cell monitoring unit (Cell Supervision Circuit, CSC) in the battery device, for collecting state information of the battery cell 20, etc., and sending it to the battery management system (BMS).

[0126] By integrally forming the first mounting seat 31 of the manual maintenance switch 30, the second mounting seat 371 of the first connector 37, and the third mounting seat 391 of the second connector 39, the assembly efficiency can be improved.

[0127] In some embodiments, the box body 10 has a storage space 101 for storing the battery cell 20, the box body 10 includes a first wall 102, the first wall 102 is provided with an opening, and the opening communicates with the through hole 34 and the storage space 101; the first mounting seat 31, the second mounting seat 371, and the third mounting seat 391 are integrally formed to form a panel, and the panel is connected to the first wall 102 and covers the opening.

[0128] By integrally forming the first mounting seat 31, the second mounting seat 371, and the third mounting seat 391 to form a panel, it is convenient for installation, and can reduce the sealing interface and improve the sealing effect.

[0129] In some embodiments, the battery device 100 further includes: a seal, disposed between the panel and the first wall 102 and surrounding the opening.

[0130] Since the first mounting base 31, the second mounting base 371, and the third mounting base 391 are integrally formed to form a panel, the sealing interface is reduced, and the sealing between the panel and the first wall 102 can be achieved through a single seal, thereby reducing costs.

[0131] An embodiment of the present application also provides an electrical device, including the battery device 100 provided in any one of the above embodiments.

[0132] An embodiment of the present application also provides a manual maintenance switch 30, including a first mounting base 31 and a cover 32. The cover 32 is detachably connected to the first mounting base 31, and the cover 32 and the first mounting base 31 jointly define a cavity 30a. Among them, the manual maintenance switch 30 further includes a ventilation mechanism 33. The first mounting base 31 and / or the cover 32 is provided with a through hole 34, and the ventilation mechanism 33 plugs the through hole 34. The ventilation mechanism 33 is configured to allow the gas in the cavity 30a to be discharged from the cavity 30a through the through hole 34.

[0133] In some embodiments, referring to Figure 8 , the ventilation mechanism 33 includes a ventilation membrane that covers the through hole 34.

[0134] In one embodiment, the ventilation membrane is located inside the cavity 30a.

[0135] In one embodiment, the ventilation membrane is a semi-permeable membrane that is breathable and waterproof.

[0136] In one embodiment, the ventilation membrane is heat-sealed or adhesively bonded to the first mounting base 31 and / or the cover 32.

[0137] The specific structure of the manual maintenance switch 30 has been introduced in detail above and will not be elaborated here.

[0138] Next, referring to Figures 4 - 8 , a specific example of the present application will be described in detail.

[0139] An embodiment of the present application provides a battery device 100, including a box body 10, battery cells 20, a manual maintenance switch 30, a first connector 37, and a second connector 39.

[0140] The box body 10 has a storage space for storing the battery cells 20. The box body 10 includes a first wall 102, and the first wall 102 is a side wall of the box body 10. The first wall 102 is provided with an opening.

[0141] The manual maintenance switch 30 includes a first mounting base 31 and a cover 32. The cover 32 is detachably connected to the first mounting base 31, and the cover 32 and the first mounting base 31 jointly define a cavity 30a. The cover 32 is inserted into the first mounting base 31 to conduct the high-voltage circuit of the battery device 100, and the cover 32 is pulled out of the first mounting base 31 to disconnect the high-voltage circuit.

[0142] The first connector 37 is a first high-voltage connector and includes a second mounting seat 371. The second connector 39 is a low-voltage connector and includes a third mounting seat 391.

[0143] The first mounting seat 31, the second mounting seat 371, and the third mounting seat 391 are integrally formed to form a panel, and the panel is connected to the first wall 102 and covers the opening. A seal is provided between the panel and the first wall 102, and the seal surrounds the opening.

[0144] The first mounting seat 31 is provided with a through hole 34, and the through hole 34 communicates the cavity 30a and the receiving space 101. The manual maintenance switch 30 further includes a ventilation mechanism 33, and the ventilation mechanism 33 is a semi-permeable membrane that covers the through hole 34. The semi-permeable membrane is a bidirectional semi-permeable membrane that allows gas to pass through and blocks liquid from passing through.

[0145] When the cover body 32 is inserted into the first mounting seat 31, the gas in the cavity 30a passes through the semi-permeable membrane, and the gas that has passed through the semi-permeable membrane is discharged to the receiving space 101 through the through hole 34.

[0146] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the present application.

Claims

1. A battery device, characterized in that, Comprising: Battery cell; Box body for accommodating the battery cell; Manual maintenance switch, including a first mounting seat and a cover body, the first mounting seat is connected to the box body, the cover body is detachably connected to the first mounting seat, and the cover body and the first mounting seat jointly define a cavity; Wherein, the manual maintenance switch further includes a ventilation mechanism, the first mounting seat and / or the cover body are provided with through holes, the ventilation mechanism blocks the through holes, and the ventilation mechanism is configured to allow the gas in the cavity to be discharged from the cavity through the through holes.

2. The battery device according to claim 1, wherein The ventilation mechanism includes a ventilation membrane covering the through hole.

3. The battery device according to claim 2, wherein The ventilation membrane is located inside the cavity.

4. The battery device according to claim 2, characterized in that, The ventilation membrane is a semi-permeable membrane that is breathable and waterproof.

5. The battery device according to claim 4, characterized in that, The semi-permeable membrane is any one of polytetrafluoroethylene membrane, polyurethane membrane, polyester membrane, polyethylene membrane, and polypropylene membrane.

6. The battery device according to claim 2, wherein, The ventilation membrane is thermally fused or adhesively bonded to the first mounting seat and / or the cover body.

7. The battery device according to any one of claims 1-6, characterized in that, The through hole is provided in the first mounting seat, the box body has a receiving space for accommodating the battery cell, and the through hole communicates the receiving space and the cavity.

8. The battery device according to any one of claims 1-6, characterized in that, The through hole is provided in the cover body, and the ventilation mechanism is configured to allow the gas in the cavity to be discharged to the outside of the box body through the through hole.

9. The battery device according to any one of claims 1-6, characterized in that, The manual maintenance switch further includes a first connection terminal and a second connection terminal, both the first connection terminal and the second connection terminal are provided on the first mounting seat, the first connection terminal is electrically connected to the battery cell, and the cover body is provided with a conductive member configured to electrically connect the first connection terminal and the second connection terminal when the cover body is connected to the first mounting seat; The battery device further includes: A first connector, including a second mounting seat and a third connection terminal, the third connection terminal is provided on the second mounting seat, the third connection terminal is electrically connected to the second connection terminal, and the second mounting seat is integrally formed with the first mounting seat.

10. The battery device according to claim 9, characterized in that, The battery device further includes: Sampling component for collecting information of the battery cell; A second connector, including a third mounting seat and a fourth connection terminal, the fourth connection terminal is provided on the third mounting seat, the fourth connection terminal is electrically connected to the sampling component, and the third mounting seat, the second mounting seat and the first mounting seat are integrally formed.

11. The battery device according to claim 10, characterized in that, The box body has a receiving space for accommodating the battery cell, the box body includes a first wall, and the first wall is provided with an opening that communicates the through hole and the receiving space; The first mounting seat, the second mounting seat and the third mounting seat are integrally formed to form a panel, and the panel is connected to the first wall and covers the opening.

12. The battery device according to claim 11, characterized in that, The battery device further includes: A seal provided between the panel and the first wall and surrounding the opening.

13. An electrical device, characterized in that, Comprising: The battery device according to any one of claims 1-12.

14. A manual maintenance switch, characterized in that, Comprising: First mounting seat; Cover body, detachably connected to the first mounting seat, and the cover body and the first mounting seat jointly define a cavity; Among them, the manual maintenance switch further includes a ventilation mechanism. The first mounting seat and / or the cover body are provided with through holes, and the ventilation mechanism seals the through holes. The ventilation mechanism is configured to allow the gas in the cavity to be discharged from the cavity through the through holes.

15. The manual maintenance switch according to claim 14, characterized in that, The ventilation mechanism includes a ventilation membrane that covers the through hole.

16. The manual maintenance switch according to claim 15, characterized in that, The ventilation membrane is located inside the cavity.

17. The manual maintenance switch according to claim 16, wherein, The ventilation membrane is a semi-permeable membrane that is breathable and waterproof.

18. The manual maintenance switch according to claim 15, wherein, The ventilation membrane is heat-melted or bonded to the first mounting seat.

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