Battery devices and electrical appliances

Abstract

This application provides a battery device and an electrical device. The battery device includes a housing, a battery cell assembly, and a current collector. The housing has an internal channel extending along a first direction. One end of the housing along the first direction has a first opening communicating with the channel and the external environment of the battery device. The battery cell assembly includes at least one battery cell, is housed within the channel, and is configured to move along the first direction to enter or exit the channel through the first opening. The battery cell includes electrode terminals. The current collector is disposed within and connected to the housing. The current collector includes a conductive portion exposed to the channel, and the electrode terminals are detachably connected to the conductive portion. This application effectively improves the maintainability of the battery device.

Description

Technical Field

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

[0002] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] In the development of battery technology, improving the maintainability of battery devices is an ongoing research direction. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device and an electrical device that can effectively improve the maintainability of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, which includes a housing, a battery cell assembly, and a current-combining component. The housing has an internal channel extending along a first direction, and one end of the housing along the first direction has a first opening communicating with the channel and the external environment of the battery device. The battery cell assembly includes at least one battery cell, is housed within the channel, and is configured to move along the first direction to enter or exit the channel through the first opening. The battery cell includes electrode terminals. The current-combining component is disposed within and connected to the housing, and includes a conductive portion exposed to the channel. The electrode terminals are detachably connected to the conductive portion.

[0006] The battery cell assembly includes a first state and a second state. In the first state, the electrode terminals are electrically connected to the conductive part, and in the second state, the electrode terminals are separated from the conductive part. The battery cell assembly can switch between the first state and the second state by moving along the channel.

[0007] With the above technical solution, when it is necessary to replace a battery cell, the battery cell can be directly slid into or out of the channel along the first direction through the first opening, without disassembling the entire battery device or performing complex assembly and disassembly operations, thereby significantly improving the modularity and maintainability of the battery device. In addition, the installation and removal of the battery cell by sliding along the channel effectively reduces the difficulty of operation.

[0008] In some embodiments of the first aspect, the busbar component further includes an insulating portion connected to the housing, the insulating portion having a groove on the side facing the electrode terminal. A conductive portion is disposed within the groove, and at least a portion of the electrode terminal is inserted into the groove and contacts the conductive portion.

[0009] The above technical solution achieves a detachable connection between the electrode terminals and the busbar component through a plug-in method. It has a simple structure, is easy to assemble, and helps to improve the installation and removal efficiency of battery cells.

[0010] In some embodiments of the first aspect, the busbar component further includes a first engaging portion disposed on the insulating portion and located within a groove. A second engaging portion corresponding to the first engaging portion is provided on the electrode terminal, the first engaging portion being used to engage with the second engaging portion.

[0011] The above technical solution improves the reliability of the connection between the electrode terminal and the busbar component by introducing the snap-fit ​​cooperation of the first snap-fit ​​part and the second snap-fit ​​part.

[0012] In some embodiments of the first aspect, the battery device further includes a baffle that is detachably connected to the housing and closes the first opening.

[0013] The above technical solution introduces a baffle, which can protect the battery cells and reduce the risk of external impurities entering the channel and damaging the battery cells, thereby improving the reliability of the battery device.

[0014] In some embodiments of the first aspect, the battery device further includes a buffer disposed between the baffle and the battery cell, the buffer having an elastic modulus less than that of the baffle.

[0015] The buffer component in the above-mentioned technical solution acts as a protective barrier, preferentially deforming and absorbing energy when the battery device is subjected to external impact or vibration. This effectively reduces the peak impact transmitted to the individual battery cells, decreases the impact energy directly acting on them, and thus reduces the risk of damage to the individual battery cells, thereby further improving the reliability of the battery device. Furthermore, the introduction of the buffer component also reduces friction between the baffle and the individual battery cells, minimizing the risk of the individual battery cells being scratched by the baffle during installation and removal.

[0016] In some embodiments of the first aspect, there are multiple channels and multiple battery cell components, with the multiple channels spaced apart along a second direction, where the first direction intersects the second direction. Each channel contains at least one battery cell component.

[0017] The above technical solution enables each battery cell component in each channel to have an independent insertion and removal path, so that the installation and removal will not interfere with the battery cell components in other channels, thereby further improving the maintainability of the battery device.

[0018] In some embodiments of the first aspect, each battery cell assembly includes a plurality of battery cells, wherein the plurality of battery cells are arranged along a second direction and the electrode terminals of the plurality of battery cells are all facing the busbar component.

[0019] The aforementioned technical solution helps reduce the number of channels, thereby simplifying the overall structural complexity of the enclosure. Furthermore, reducing the number of channels also helps improve the utilization efficiency of the internal space, allowing more battery cells to be accommodated within a limited volume, thus increasing the energy density of the battery device. At the same time, this arrangement still maintains good maintainability. Therefore, the above technical solution achieves a good balance between the maintainability, structural complexity, and energy density of the battery device.

[0020] In some embodiments of the first aspect, in each battery cell assembly, any two adjacent battery cells are fixedly connected.

[0021] The above technical solution, through the fixed connection between adjacent battery cells, can effectively suppress the relative displacement caused by vibration or impact during transportation, installation or operation, and reduce the risk of contact sliding, rubbing or surface scratches between adjacent battery cells.

[0022] In some embodiments of the first aspect, the housing includes a first wall disposed opposite to a first opening along a first direction, a busbar component connected to the side of the first wall facing the battery cell assembly, and electrode terminals detachably connected to the side of the conductive portion facing away from the first wall.

[0023] The first wall not only provides a mounting surface for the busbar component, but also provides stable support during the connection of the busbar component to the electrode terminals, thereby effectively reducing the risk of damage to the busbar component during the installation and removal of the battery cell assembly.

[0024] In some embodiments of the first aspect, the housing further has a second opening, with the first and second openings respectively located at both ends of the housing along a first direction, and the second opening communicating with the channel and the external environment of the battery device. Each channel contains multiple battery cell assemblies, including a first battery cell assembly and a second battery cell assembly located within the same channel, the first and second battery cell assemblies being arranged opposite to each other along the first direction.

[0025] A first battery cell assembly is configured to move along a first direction to enter or exit the channel through a first opening, and a second battery cell assembly is configured to move along the first direction to enter or exit the channel through a second opening. A busbar is disposed within the channel, and the first and second battery cell assemblies are located on opposite sides of the busbar along the first direction, respectively, with the electrode terminals of both the first and second battery cell assemblies detachably connected to conductive portions.

[0026] The above technical solution, by providing a first opening and a second opening at both ends of the housing in a first direction, allows the first and second battery cell assemblies to be independently disassembled and assembled from different directions. Especially when the channel length is large or the number of internal battery cells is large, this bidirectional opening structure can reduce the travel and operational interference required for battery cell disassembly and assembly, effectively reducing maintenance difficulty.

[0027] In some embodiments of the first aspect, the busbar includes a first busbar and a second busbar, which are disposed along a first direction. The first busbar faces a first battery cell assembly along the first direction, and the second busbar faces a second battery cell assembly along the first direction. The electrode terminals of the first battery cell assembly are detachably connected to the conductive portion of the first busbar, and the electrode terminals of the second battery cell assembly are detachably connected to the conductive portion of the second busbar.

[0028] The independent configuration of the first and second busbar components, with the first and second busbar components respectively connected to the first and second battery cell assemblies, enables the battery device to achieve zoned control, segmented maintenance, and partial replacement during operation, thereby improving the operational stability and maintainability of the battery device.

[0029] In some embodiments of the first aspect, the battery device further includes a heat exchange component connected between the battery cell and the inner wall of the channel.

[0030] The above technical solution introduces heat exchange components, enabling the heat generated by the battery cells to be quickly conducted to the housing or external cooling structure, reducing heat accumulation and minimizing the risk of thermal runaway caused by local temperature rise.

[0031] In some embodiments of the first aspect, the housing is further provided with a pressure relief channel, which connects to the external environment.

[0032] When a battery cell releases gas due to a fault or thermal runaway during normal operation or charging / discharging, the pressure relief channel can provide a fast and effective release path, avoiding the risk of the casing expanding, cracking, or even exploding due to internal pressure accumulation, thus significantly improving the reliability of the battery device.

[0033] In some embodiments of the first aspect, a pressure relief channel forms a first hole on the outer wall surface of the housing. The battery device also includes a seal connected to the housing and sealing the first hole, the seal being configured to release the seal on the first hole when the pressure within the channel reaches a preset threshold.

[0034] The above technical solution introduces a sealing element that can seal the pressure relief channel during normal operation of the battery device, thereby reducing the risk of external impurities entering the pressure relief channel and causing it to become blocked, thus further improving the reliability of the battery device.

[0035] Secondly, this application provides an electrical device that includes a battery device provided in any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0036] 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

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application;

[0039] Figure 2 This is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0040] Figure 3 This is a side view of a battery device provided in some embodiments of this application;

[0041] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along AA;

[0042] Figure 5 This is a front view structural diagram of a battery cell of a battery device provided in some embodiments of this application;

[0043] Figure 6 This is a top view of a single battery cell of a battery device provided in some embodiments of this application;

[0044] Figure 7 This is a side view of another battery device provided in some embodiments of this application;

[0045] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along FF;

[0046] Figure 9 This is a side view of another battery device provided in some embodiments of this application;

[0047] Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure along BB;

[0048] Figure 11 for Figure 10 A magnified schematic diagram of the local structure at point H;

[0049] Figure 12 for Figure 11 A schematic diagram of the partial split structure shown;

[0050] Figure 13 This is a side view structural schematic diagram of another battery device provided in some embodiments of this application;

[0051] Figure 14 for Figure 13 Schematic diagram of the cross-sectional structure along CC;

[0052] Figure 15 This is an exploded structural diagram of another battery device provided in some embodiments of this application;

[0053] Figure 16 A top view schematic diagram of another battery device provided in some embodiments of this application;

[0054] Figure 17 for Figure 16 Schematic diagram of the cross-sectional structure along EE;

[0055] Figure 18 This is a top view schematic diagram of another battery device provided in some embodiments of this application.

[0056] The reference numerals in the detailed embodiments are as follows:

[0057] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor;

[0058] 10. Box body; 11. Channel; 12a. First opening; 12b. Second opening; 13. Pressure relief channel; 14. First wall;

[0059] 200, Battery cell assembly; 200a, First battery cell assembly; 200b, Second battery cell assembly; 20, Battery cell; 21, Electrode terminal; 22, Housing; 221, First sidewall; 222, Second sidewall; 223, Third sidewall; 224, Fourth sidewall; 225, Fifth sidewall; 226, Sixth sidewall;

[0060] 30. Busbar component; 30a. First busbar component; 30b. Second busbar component; 31. Insulating part; 32. Conductive part; 33. Groove; 34. First snap-fit ​​part; 35. Second snap-fit ​​part;

[0061] 40. Baffle;

[0062] 50. Buffer components;

[0063] 60. Heat exchange components;

[0064] 70. Sealing components;

[0065] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0067] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application 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 drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0068] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0069] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0070] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0071] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0072] In this application, "multiple" means two or more (including two).

[0073] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0074] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0075] In the development of battery technology, improving the maintainability of battery devices is an ongoing research direction.

[0076] During the use of a battery device, the performance of individual battery cells gradually declines. Replacing the less efficient cells can effectively extend the overall lifespan of the battery device and reduce resource waste. Furthermore, if a battery cell within the device malfunctions or is damaged, disassembling and replacing that cell can effectively prevent potential safety risks.

[0077] However, in related technologies, since battery cells are generally bonded to the battery pack housing with a large amount of glue, the bonded battery cells are difficult to disassemble or replace; in addition, the battery cells and the busbar components are usually connected by welding, which also makes the battery cells difficult to disassemble or replace.

[0078] Based on the above considerations, this application designs a battery device, which includes a housing, a battery cell assembly, and a current-combining component. The housing has an internal channel extending along a first direction, and one end of the housing along the first direction has a first opening connecting the channel and the external environment of the battery device. The battery cell assembly includes at least one battery cell, is housed within the channel, and is configured to move along the first direction to enter or exit the channel through the first opening. The battery cell includes electrode terminals. The current-combining component is disposed within and connected to the housing, and includes a conductive portion exposed to the channel. The electrode terminals are detachably connected to the conductive portion.

[0079] The battery cell assembly includes a first state and a second state. In the first state, the electrode terminals are electrically connected to the conductive part, and in the second state, the electrode terminals are separated from the conductive part. The battery cell assembly can switch between the first state and the second state by moving along the channel.

[0080] With the above technical solution, when it is necessary to replace a battery cell, the battery cell can be directly slid into or out of the channel along the first direction through the first opening, without having to disassemble the entire battery device or perform complex disassembly and assembly operations, thereby significantly improving the modularity and maintainability of the battery device.

[0081] The battery cells described in this application are applicable to battery devices and electrical equipment using battery devices. Electrical equipment can be devices that use battery devices as a power source or various energy storage systems that use battery devices as energy storage elements. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0082] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0083] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0084] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0085] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0086] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0087] In some embodiments, the battery device 2 may be an energy storage device.

[0088] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0089] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0090] Figure 2 This is an exploded view of the structure of a battery device provided in some embodiments of this application. Figure 3 This is a side view of a battery device provided in some embodiments of this application. Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along AA.

[0091] Continue to refer to Figures 2 to 4 This application provides a battery device 2, which includes a housing 10, a battery cell assembly 200, and a current-carrying component 30. The housing 10 has a channel 11 inside, which extends along a first direction X. One end of the housing 10 along the first direction X has a first opening 12a, which connects the channel 11 and the external environment of the battery device 2.

[0092] The battery cell assembly 200 includes at least one battery cell 20, which is housed within a channel 11. The battery cell assembly 200 is configured to move along a first direction X to enter or exit the channel 11 through a first opening 12a. The battery cell 20 includes electrode terminals 21. A busbar assembly 30 is disposed within and connected to the housing 10. The busbar assembly 30 includes a conductive portion 32 exposed to the channel 11. The electrode terminals 21 are detachably connected to the conductive portion 32.

[0093] The battery cell assembly 200 includes a first state and a second state. In the first state, the electrode terminal 21 is electrically connected to the conductive part 32. In the second state, the electrode terminal 21 is separated from the conductive part 32. The battery cell assembly 200 can switch between the first state and the second state by moving along the channel 11.

[0094] The battery device 2 may include one or more battery cell assemblies 200 for providing voltage and capacity.

[0095] The battery cell assembly 200 may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar 30. Mixed connection means that some of the multiple battery cells 20 are connected in series and some in parallel.

[0096] The battery cell 20 can be a rechargeable battery. A rechargeable battery is a type of battery that can be used again after the battery cell 20 has been discharged because the active materials can be activated by charging.

[0097] As an example, the battery cell 20 can be a lithium-ion battery cell 20, a sodium-ion battery cell 20, a sodium-lithium-ion battery cell 20, a lithium metal battery cell 20, a sodium metal battery cell 20, a lithium-sulfur battery cell 20, a magnesium-ion battery cell 20, a nickel-metal hydride battery cell 20, a nickel-cadmium battery cell 20, a lead-acid battery cell 20, etc.

[0098] As an example, the battery cell 20 can be a prismatic battery cell, a pouch battery cell, or a battery cell 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.

[0099] A battery cell assembly 200 is typically formed by arranging multiple battery cells 20; as an example, the battery cell assembly 200 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0100] The battery device 2 can be a battery pack, which includes a housing 10 and one or more battery cell assemblies 200, with the battery cell assemblies 200 housed in the housing 10.

[0101] The first opening 12a can be understood as the channel 11 being formed by opening to the outside on the end face of the box 10 along the first direction X.

[0102] As an example, the housing 10 has a first opening 12a at one end along the first direction X, that is, one end of the channel 11 along the first direction X can communicate with the external environment, and the other end of the channel 11 along the first direction X is closed.

[0103] As an example, the housing 10 has a first opening 12a at one end along the first direction X and a second opening 12b at the other end, meaning that both ends of the channel 11 along the first direction X can communicate with the external environment.

[0104] The combiner unit 30 is used to collect the output power of multiple battery cells 20.

[0105] The busbar component 30 can be detachably connected to the housing 10, or it can be integrally mounted on the housing 10. The busbar component 30 can be directly connected to the housing 10, or it can be constrained to the housing 10 by other components. As an example, the connection method between the busbar component 30 and the housing 10 can be, but is not limited to, welding, bolting, snap-fitting, riveting, or bonding.

[0106] The detachable connection between the electrode terminal 21 and the bus component 30 can be achieved, but is not limited to, by means of plugging, snapping, spring pressing or magnetic attraction.

[0107] With the above technical solution, when it is necessary to replace the battery cell 20, the battery cell 20 can be directly slid into or out of the channel 11 along the first direction X through the first opening 12a, without having to disassemble the entire battery device 2 or perform complex disassembly and assembly operations, thereby significantly improving the modularity and maintainability of the battery device 2. In addition, the installation and removal of the battery cell 20 by sliding along the channel 11 effectively reduces the difficulty of operation.

[0108] For example, when a battery cell 20 of the battery device 2 malfunctions, the connection between the electrode terminal 21 of the malfunctioning battery cell 20 and the busbar component 30 can be disconnected, and the malfunctioning battery cell 20 can be slid directly out of the channel 11 along the first direction X through the first opening 12a for repair or replacement with a new battery cell 20. Then, the repaired battery cell 20 or the new battery cell 20 is slid back into the channel 11 along the first direction X, and the electrode terminal 21 of the battery cell 20 is connected to the busbar component 30.

[0109] It should be noted that, during the process of the battery cell 20 sliding out of the channel 11 in the first direction X, the electrode terminal 21 of the battery cell 20 can be separated from the busbar component 30, for example, in cases where the electrode terminal 21 and the busbar component 30 are detachably connected by means of plugging, snapping, or magnetic attraction. Alternatively, the connection between the electrode terminal 21 of the battery cell 20 and the busbar component 30 can be disconnected first, that is, the electrode terminal 21 is separated from the conductive part 32, and then the battery cell 20 is slid out of the channel 11 in the first direction X. For example, in cases where the electrode terminal 21 and the busbar component 30 are detachably connected by means of a switchable latch.

[0110] Similarly, the electrode terminals 21 of the battery cell 20 can be connected to the busbar component 30 during the process of the battery cell 20 sliding into the channel 11 along the first direction X. For example, the electrode terminals 21 and the busbar component 30 can be detachably connected by means of plugging, snapping, or magnetic attraction. Alternatively, the battery cell 20 can be slid into the channel 11 along the first direction X first, and then the electrode terminals 21 of the battery cell 20 can be connected to the busbar component 30. For example, the electrode terminals 21 and the busbar component 30 can be detachably connected by means of a switchable latch.

[0111] In some embodiments, the battery cell 20 includes a housing 22 and an electrode assembly, the electrode assembly being housed within the housing 22, an electrode terminal 21 being disposed on the housing 22, and at least a portion of the electrode terminal 21 being located outside the housing 22, the electrode terminal 21 being electrically connected to the tabs of the electrode assembly.

[0112] Figure 5 This is a front view structural diagram of a battery cell of a battery device provided in some embodiments of this application. Figure 6 This is a top view of a single battery cell in a battery device provided in some embodiments of this application. Figure 7 This is a side view schematic diagram of another battery device provided in some embodiments of this application. Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure along FF.

[0113] Continue to refer to Figures 5 to 8 In some embodiments, the housing 22 includes a first sidewall 221 and a second sidewall 222 facing away from each other along a first direction X. The first sidewall 221 faces the first opening 12a, and the second sidewall 222 faces away from the first opening 12a. The electrode terminal 21 may be disposed on the second sidewall 222, and the busbar component 30 is disposed opposite to the electrode terminal 21 along the first direction X.

[0114] For example, the busbar 30 is oriented toward the electrode terminal 21 along the first direction X.

[0115] In some embodiments, the housing 22 further includes a third sidewall 223 and a fourth sidewall 224 opposite to each other along the second direction Y. The third sidewall 223 is connected between the first sidewall 221 and the second sidewall 222, and the fourth sidewall 224 is connected between the first sidewall 221 and the second sidewall 222. The first direction X intersects the second direction Y. The electrode terminal 21 may be disposed on at least one of the third sidewall 223 and the fourth sidewall 224, and the bus member 30 is disposed opposite to the electrode terminal 21 along the second direction Y.

[0116] For example, the bus component 30 is oriented toward the electrode terminal 21 along the second direction Y.

[0117] In some embodiments, electrode terminals 21 are disposed on the third sidewall 223.

[0118] For example, the electrode terminal 21 may include a positive terminal and a negative terminal, both of which are disposed on the third sidewall 223, and the bus member 30 is oriented toward the positive terminal and the negative terminal along the second direction Y.

[0119] In some embodiments, electrode terminals 21 are disposed on the fourth sidewall 224.

[0120] For example, the electrode terminal 21 may include a positive terminal and a negative terminal, both of which are disposed on the fourth sidewall 224, and the busbar 30 is oriented toward the positive terminal and the negative terminal along the second direction Y.

[0121] In some embodiments, electrode terminals 21 are disposed on the third sidewall 223 and the fourth sidewall 224.

[0122] For example, electrode terminal 21 may include a positive terminal and a negative terminal, one of which is disposed on the third sidewall 223, and the other of which is disposed on the fourth sidewall 224. The busbar component 30 may include a first busbar and a second busbar, which are respectively disposed on opposite sides of the battery cell 20 along the second direction Y. The first busbar is disposed opposite to the positive terminal along the second direction Y and faces the positive terminal along the second direction Y. The second busbar is disposed opposite to the negative terminal along the second direction Y and faces the negative terminal along the second direction Y.

[0123] In some embodiments, the first direction X is perpendicular to the second direction Y.

[0124] In some embodiments, the housing 22 further includes a fifth sidewall 225 and a sixth sidewall 226 opposite to each other along a third direction Z. The fifth sidewall 225 is connected between the first sidewall 221 and the second sidewall 222, and the sixth sidewall 226 is connected between the first sidewall 221 and the second sidewall 222. The fifth sidewall 225 is connected between the third sidewall 223 and the fourth sidewall 224, and the sixth sidewall 226 is connected between the third sidewall 223 and the fourth sidewall 224. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The electrode terminal 21 may be disposed on at least one of the fifth sidewall 225 and the sixth sidewall 226, and the bus member 30 is disposed opposite to the electrode terminal 21 along the third direction Z.

[0125] For example, the bus component 30 is oriented towards the electrode terminal 21 in the third direction Z.

[0126] In some embodiments, electrode terminals 21 are disposed on the fifth sidewall 225.

[0127] For example, the electrode terminal 21 may include a positive terminal and a negative terminal, both of which are disposed on the fifth sidewall 225, and the bus member 30 is oriented toward the positive terminal and the negative terminal in the third direction Z.

[0128] like Figures 7 to 8 As shown, in some embodiments, electrode terminals 21 are disposed on the sixth sidewall 226.

[0129] For example, the electrode terminal 21 may include a positive terminal and a negative terminal, both of which are disposed on the sixth sidewall 226, and the bus member 30 is oriented toward the positive terminal and the negative terminal in the third direction Z.

[0130] As an example, the dimensions of the conductive part 32 of the busbar component 30 along the third direction Z can be reasonably set so that after the battery cell 20 enters the channel 11 and reaches the preset position, the conductive part 32 and the electrode terminal 21 can abut against each other, and there is a certain compressive force between the conductive part 32 and the electrode terminal 21 in the third direction Z, so as to improve the reliability of the electrical connection between the conductive part 32 and the electrode terminal 21.

[0131] As another example, the connection between the conductive part 32 and the electrode terminal 21 can also be achieved by magnetic attraction, so that after the battery cell 20 enters the channel 11 and reaches the preset position, the conductive part 32 and the electrode terminal 21 can be magnetically attracted to each other, thereby improving the reliability of the electrical connection between the conductive part 32 and the electrode terminal 21.

[0132] In some embodiments, electrode terminals 21 are disposed on the fifth sidewall 225 and the sixth sidewall 226.

[0133] For example, electrode terminal 21 may include a positive terminal and a negative terminal, one of which is disposed on the fifth sidewall 225, and the other of which is disposed on the sixth sidewall 226. The busbar component 30 may include a first busbar and a second busbar, which are respectively disposed on opposite sides of the battery cell 20 along a third direction Z. The first busbar is disposed opposite to the positive terminal along the third direction Z and faces the positive terminal along the third direction Z. The second busbar is disposed opposite to the negative terminal along the third direction Z and faces the negative terminal along the third direction Z.

[0134] In some embodiments, a sliding portion is provided on the side of the housing 22 facing away from the electrode assembly. The sliding portion extends along the first direction X. The inner wall of the channel 11 is provided with a mating portion corresponding to the sliding portion. The sliding portion and the mating portion cooperate to realize the movable arrangement of the battery cell 20 along the first direction X.

[0135] As an example, the sliding part is a slider, and the mating part is a groove.

[0136] As another example, the sliding part is a groove, and the mating part is a slider.

[0137] The cooperation between the sliding part and the mating part can not only improve the sliding stability of the battery cell 20 during the installation and removal process, but also play a certain positioning role in the installation of the battery cell 20, reducing the assembly difficulty.

[0138] In some embodiments, the busbar component 30 further includes an insulating portion 31 connected to the housing 10, and a groove 33 is provided on the side of the insulating portion 31 facing the electrode terminal 21. A conductive portion 32 is disposed in the groove 33, and at least a portion of the electrode terminal 21 is inserted into the groove 33 and contacts the conductive portion 32.

[0139] As an example, part of the conductive portion 32 is exposed within the groove 33, while the other part is covered by the insulating portion 31. That is, the conductive portion 32 and the insulating portion 31 are formed as an in-mold insert.

[0140] The electrode terminal 21 may be partially inserted into the groove 33 and partially located outside the groove 33; or the electrode terminal 21 may be entirely inserted into the groove 33.

[0141] The insulating part 31 serves the functions of electrical isolation and structural support, while the conductive part 32 serves the function of collecting the output power of multiple battery cells 20.

[0142] Optionally, the conductive part 32 may be, but is not limited to, a plate-like structure, a sheet-like structure, or an elastic spring-like structure.

[0143] The above technical solution achieves a detachable connection between the electrode terminal 21 and the busbar component 30 through a plug-in method. The structure is simple, easy to assemble, and helps to improve the installation and disassembly efficiency of the battery cell 20.

[0144] Figure 9 This is a side view schematic diagram of another battery device provided in some embodiments of this application. Figure 10 for Figure 9 A schematic diagram of the cross-sectional structure along BB. Figure 11 for Figure 10 A magnified schematic diagram of the local structure at point H. Figure 12 for Figure 11 The diagram shows a partial split structure.

[0145] Continue to refer to Figures 9 to 12 In some embodiments, the busbar component 30 further includes a first engaging portion 34, which is disposed on the insulating portion 31 and located within the groove 33. The electrode terminal 21 is provided with a second engaging portion 35 corresponding to the first engaging portion 34, and the first engaging portion 34 is used to engage with the second engaging portion 35.

[0146] The first snap-fit ​​portion 34 can be detachably connected to the insulating portion 31, or it can be integrally formed on the insulating portion 31. The first snap-fit ​​portion 34 can be directly connected to the insulating portion 31, or it can be constrained to the insulating portion 31 by other components. As an example, the connection method between the first snap-fit ​​portion 34 and the insulating portion 31 can be, but is not limited to, bolt connection, snap-fit, riveting, or bonding.

[0147] The second snap-fit ​​portion 35 can be detachably connected to the electrode terminal 21, or it can be integrally formed on the electrode terminal 21. The second snap-fit ​​portion 35 can be directly connected to the electrode terminal 21, or it can be constrained to the electrode terminal 21 by other components. As an example, the connection method between the second snap-fit ​​portion 35 and the electrode terminal 21 can be, but is not limited to, bolt connection, snap-fit, riveting, or bonding.

[0148] The fact that the first snap-fit ​​part 34 corresponds to the second snap-fit ​​part 35 means that the position, structural shape and size of the first snap-fit ​​part 34 and the second snap-fit ​​part 35 are compatible.

[0149] For example, one of the first latching portion 34 and the second latching portion 35 is a latching block, and the other of the first latching portion 34 and the second latching portion 35 is a latching slot.

[0150] The above technical solution improves the reliability of the connection between the electrode terminal 21 and the bus component 30 by introducing the snap-fit ​​cooperation of the first snap-fit ​​part 34 and the second snap-fit ​​part 35.

[0151] In some embodiments, the first snap-fit ​​portion 34 and the insulating portion 31 are integrally formed. On the one hand, there is no need to connect the first snap-fit ​​portion 34 and the insulating portion 31 through an additional connection process, simplifying the manufacturing process. At the same time, compared with connecting the first snap-fit ​​portion 34 and the insulating portion 31 through an additional connection process, the integral structure of the first snap-fit ​​portion 34 and the insulating portion 31 has higher structural strength.

[0152] In some embodiments, the second snap-fit ​​portion 35 and the electrode terminal 21 are integrally formed. On the one hand, there is no need to connect the second snap-fit ​​portion 35 and the electrode terminal 21 through an additional connection process, simplifying the manufacturing process. At the same time, compared with connecting the second snap-fit ​​portion 35 and the electrode terminal 21 through an additional connection process, the integral structure of the second snap-fit ​​portion 35 and the electrode terminal 21 has higher structural strength.

[0153] Figure 13 This is a side view schematic diagram of another battery device provided in some embodiments of this application. Figure 14 for Figure 13 A schematic diagram of the cross-sectional structure along CC.

[0154] Continue to refer to Figures 13 to 14 In some embodiments, the battery device 2 further includes a baffle 40, which is detachably connected to the housing 10 and closes the first opening 12a.

[0155] For example, the baffle 40 may be, but is not limited to, a detachable connection to the housing 10 by means of bolts, plugs, or snaps.

[0156] As an example, the baffle 40 is bolted to the housing 10.

[0157] Optionally, the baffle 40 may be made of, but is not limited to, materials such as stainless steel, aluminum, aluminum alloy, polycarbonate, polypropylene, polyethylene, or rubber.

[0158] The above technical solution introduces a baffle 40, which can protect the battery cell 20, thereby reducing the risk of external impurities entering the channel 11 and damaging the battery cell 20, thus improving the reliability of the battery device 2.

[0159] In some embodiments, the baffle 40 is rotatably connected to the housing 10, and the baffle 40 can close and open the first opening 12a by its own rotation. In other words, the baffle 40 has a flip-type structure.

[0160] For example, the rotation axis of the baffle 40 is perpendicular to the first direction X, and the rotation axis of the baffle 40 can be parallel to the second direction Y or the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0161] In some embodiments, the battery device 2 further includes a buffer 50 disposed between the baffle 40 and the battery cell 20, wherein the elastic modulus of the buffer 50 is less than that of the baffle 40.

[0162] The buffer element 50 may be fixed to the baffle 40. The buffer element 50 may be detachably connected to the baffle 40 or integrally formed on the baffle 40. The buffer element 50 may be directly connected to the baffle 40 or constrained to the baffle 40 by other components. As an example, the connection method between the buffer element 50 and the baffle 40 may be, but is not limited to, bolt connection, plug-in connection, or adhesive connection.

[0163] The buffer 50 may also be fixed to the battery cell 20. The buffer 50 may be detachably connected to the battery cell 20. The buffer 50 may be directly connected to the battery cell 20, or it may be constrained to the battery cell 20 by other components. As an example, the connection method between the buffer 50 and the battery cell 20 may be, but is not limited to, bolt connection, plug-in connection, or adhesive connection.

[0164] Of course, the buffer 50 may also be neither fixedly connected to the baffle 40 nor fixedly connected to the battery cell 20. In the battery device 2, the buffer 50 is relatively fixed by the squeezing force between the baffle 40 and the battery cell 20.

[0165] Optionally, the buffer 50 may be, but is not limited to, a sheet-like structure or a block-like structure.

[0166] Optionally, the cushioning element 50 may be made of, but is not limited to, materials such as foam, rubber, polyurethane foam, or expandable polypropylene.

[0167] The buffer 50 in the above-mentioned technical solution can act as a protective barrier, preferentially deforming and absorbing energy when the battery device 2 is subjected to external impact or vibration, effectively reducing the peak impact transmitted to the battery cell 20, reducing the impact energy directly acting on the battery cell 20, thereby reducing the risk of damage to the battery cell 20, and further improving the reliability of the battery device 2. In addition, the introduction of the buffer 50 can also reduce the friction between the baffle 40 and the battery cell 20, reducing the risk of the battery cell 20 being scratched by the baffle 40 during disassembly and assembly.

[0168] As an example, the elastic modulus of the buffer 50 and the baffle 40 can be tested with reference to the national standard GB / T 22315-2008 "Test Method for Elastic Modulus and Poisson's Ratio of Metallic Materials".

[0169] In some embodiments, the battery device 2 further includes a sealing ring disposed between the baffle 40 and the housing 10 to improve the sealing performance of the battery device 2.

[0170] In some embodiments, there are multiple channels 11 and multiple battery cell components 200. Multiple channels 11 are arranged at intervals along the second direction Y. The first direction X intersects the second direction Y. Each channel 11 is provided with at least one battery cell component 200.

[0171] For example, the number of channels 11 can be two, three, four, eight or more. The number of battery cell components 200 within each channel 11 can be one, two, three, four or more.

[0172] As an example, there are eight channels 11, each channel 11 is provided with a battery cell assembly 200, and each battery cell assembly 200 includes four battery cells 20.

[0173] The above technical solution enables each battery cell assembly 200 in each channel 11 to have an independent insertion and removal path, so that it will not interfere with the battery cell assembly 200 in other channels 11 during disassembly and assembly, thereby further improving the maintainability of the battery device 2.

[0174] In some embodiments, the first direction X is perpendicular to the second direction Y.

[0175] In some embodiments, each battery cell assembly 200 includes a plurality of battery cells 20, wherein the plurality of battery cells 20 are arranged along a second direction Y, and the electrode terminals 21 of the plurality of battery cells 20 are all facing the busbar 30.

[0176] The aforementioned technical solution helps to reduce the number of channels 11 to some extent, thereby simplifying the overall structural complexity of the housing 10. Furthermore, reducing the number of channels 11 also helps to improve the utilization efficiency of the internal space of the housing 10, allowing more battery cells 20 to be accommodated within a limited volume, thus increasing the energy density of the battery device 2. At the same time, this arrangement still maintains good maintainability. Therefore, the aforementioned technical solution achieves a good balance between the maintainability, structural complexity, and energy density of the battery device 2.

[0177] In some embodiments, in each battery cell assembly 200, any two adjacent battery cells 20 are fixedly connected.

[0178] For example, there are eight channels 11, and each channel 11 is provided with a battery cell assembly 200. Each battery cell assembly 200 includes four battery cells 20, and the four battery cells 20 are arranged and fixed to form an independent module.

[0179] As an example, in each of the battery cell assembly 200, any two adjacent battery cells 20 are bonded together.

[0180] The above technical solution, through the fixed connection between adjacent battery cells 20, can effectively suppress the relative displacement caused by vibration or impact during transportation, installation or operation, and reduce the risk of contact sliding, rubbing or surface scratches between adjacent battery cells 20.

[0181] In some embodiments, a heat insulation plate is provided between any two adjacent battery cells 20, and the battery cells on both sides of the heat insulation plate can be connected to the heat insulation plate respectively. Optionally, the battery cells 20 are bonded to the heat insulation plate.

[0182] In some embodiments, the housing 10 includes a first wall 14, which is disposed opposite to the first opening 12a along a first direction X. A busbar 30 is connected to the side of the first wall 14 facing the battery cell assembly 200, and an electrode terminal 21 is detachably connected to the side of the conductive part 32 facing away from the first wall 14.

[0183] For example, the above structure can be understood as a single-sided first opening 12a structure of the box 10, that is, the end of the channel 11 away from the first wall 14 along the first direction X can be connected to the external environment, and the end of the channel 11 close to the first wall 14 along the first direction X is closed.

[0184] The first wall 14 of the battery cell assembly 200 not only provides a mounting base for the busbar component 30, but also provides a stable support force during the connection of the busbar component 30 to the electrode terminals 21, thereby effectively reducing the risk of damage to the busbar component 30 during the installation and removal of the battery cell assembly 200.

[0185] Figure 15 This is an exploded structural diagram of another battery device provided in some embodiments of this application.

[0186] Continue to refer to Figure 15 In some embodiments, the housing also has a second opening 12b. The first opening 12a and the second opening 12b are respectively disposed at both ends of the housing 10 along the first direction X. The second opening 12b connects the channel 11 and the external environment of the battery device 2. Each channel 11 is provided with a plurality of battery cell assemblies 200. The plurality of battery cell assemblies 200 located in the same channel 11 include a first battery cell assembly 200a and a second battery cell assembly 200b. The first battery cell assembly 200a and the second battery cell assembly 200b are arranged opposite to each other along the first direction X.

[0187] The first battery cell assembly 200a is configured to move along a first direction X to enter or exit the channel 11 through the first opening 12a, and the second battery cell assembly 200b is configured to move along the first direction X to enter or exit the channel 11 through the second opening 12b. A busbar assembly 30 is disposed within the channel 11, with the first battery cell assembly 200a and the second battery cell assembly 200b located on opposite sides of the busbar assembly 30 along the first direction X. The electrode terminals 21 of both the first battery cell assembly 200a and the second battery cell assembly 200b are detachably connected to the conductive portion 32.

[0188] For example, the above structure can be understood as a double-sided opening structure of the box 10, that is, both ends of the channel 11 along the first direction X can be connected to the external environment.

[0189] The busbar component 30 is located in the middle area of ​​the channel 11. The first battery cell assembly 200a and the second battery cell assembly 200b are detachably connected to the busbar component 30 from opposite sides along the first direction X.

[0190] The above technical solution provides a first opening 12a and a second opening 12b at both ends of the housing 10 in the first direction X, allowing the first battery cell assembly 200a and the second battery cell assembly 200b to be independently assembled and disassembled from different directions. Especially when the channel 11 is long or the number of internal battery cells 20 is large, this double-sided opening structure can reduce the travel and operational interference required for assembling and disassembling the battery cells 20, effectively reducing maintenance difficulty.

[0191] In some embodiments, the housing 10 includes a first wall 14 located between a first battery cell assembly 200a and a second battery cell assembly 200b, and a busbar 30 connected to two opposite sides of the first wall 14 along a first direction X.

[0192] In some embodiments, each first battery cell assembly 200a includes a plurality of first battery cells disposed along a second direction Y.

[0193] In some embodiments, in each first battery cell assembly 200a, any two adjacent first battery cells are fixedly connected.

[0194] In some embodiments, each second battery cell assembly 200b includes a plurality of second battery cells disposed along a second direction Y.

[0195] In some embodiments, in each second battery cell assembly 200b, any two adjacent second battery cells are fixedly connected.

[0196] In some embodiments, the busbar component 30 includes a first busbar component 30a and a second busbar component 30b, which are disposed along a first direction X. The first busbar component 30a faces the first battery cell assembly 200a along the first direction X, and the second busbar component 30b faces the second battery cell assembly 200b along the first direction X. The electrode terminals 21 of the first battery cell assembly 200a are detachably connected to the conductive portion 32 of the first busbar component 30a, and the electrode terminals 21 of the second battery cell assembly 200b are detachably connected to the conductive portion 32 of the second busbar component 30b.

[0197] The first busbar component 30a is used to collect the output power of multiple first battery cells in the first battery cell assembly 200a, and the second busbar component 30b is used to collect the output power of multiple second battery cells in the second battery cell assembly 200b.

[0198] The independent configuration of the first busbar component 30a and the second busbar component 30b, with the first busbar component 30a and the second busbar component 30b respectively connected to the first battery cell assembly 200a and the second battery cell assembly 200b, enables the battery device 2 to achieve zoned control, segmented maintenance and partial replacement during operation, thereby improving the operational stability and maintainability of the battery device 2.

[0199] In some embodiments, the first busbar component 30a and the second busbar component 30b are spaced apart along a first direction X.

[0200] In some embodiments, the first busbar 30a and the second busbar 30b are connected to improve the stability of the first busbar 30a and the second busbar 30b.

[0201] In some embodiments, the battery device 2 further includes a heat exchange component 60, which is connected between the battery cell 20 and the inner wall of the channel 11.

[0202] Exemplarily, the heat exchange component 60 is thermally connected (e.g., attached) to at least a portion of the battery cell 20, and the heat exchange medium flows within the heat exchange body and exchanges heat with the battery cell 20 through the sidewalls of the heat exchange body. When the temperature of the battery cell 20 is too high, the heat exchange component 60 can cool the battery cell 20; when the temperature of the battery cell 20 is too low, the heat exchange component 60 can keep the battery cell 20 warm, thereby improving the service life of the battery cell 20.

[0203] As an example, the heat exchange component 60 has a medium flow channel inside, which is used to contain the heat exchange medium.

[0204] The medium flow channel inside the heat exchange component 60 can extend in a straight line or in a curve, depending on the actual application environment.

[0205] In some examples, the heat exchange component 60 contacts the sidewall with the largest area of ​​the battery cell 20 to improve the heat exchange efficiency of the battery.

[0206] Optionally, the heat exchange medium can be a liquid, which can be, but is not limited to, water, ethylene glycol, and mixtures of water and ethylene glycol.

[0207] The heat exchange component 60 may be fixed to the housing 10 or detachably connected to the housing 10. The heat exchange component 60 may be directly connected to the housing 10 or may be constrained to the housing 10 by other components. As an example, the connection method between the heat exchange component 60 and the housing 10 may be, but is not limited to, bolt connection, plug-in connection, or adhesive connection.

[0208] The heat exchange component 60 may also be fixed to the battery cell 20. The heat exchange component 60 may be detachably connected to the battery cell 20. The heat exchange component 60 may be directly connected to the battery cell 20, or it may be constrained to the battery cell 20 by other components. As an example, the connection method between the heat exchange component 60 and the battery cell 20 may be, but is not limited to, bolted connection, plug-in connection, or adhesive connection.

[0209] Of course, the heat exchange component 60 may also be neither fixedly connected to the baffle 40 nor fixedly connected to the battery cell 20. In the battery device 2, the heat exchange component 60 is relatively fixed by the squeezing force between the baffle 40 and the battery cell 20.

[0210] The above technical solution introduces a heat exchange component 60, which enables the heat generated by the battery cell 20 to be quickly conducted to the housing 10 or external cooling structure, reducing heat accumulation and minimizing the risk of thermal runaway caused by local temperature rise.

[0211] In some embodiments, the heat exchange component 60 is a plate-shaped structure.

[0212] In some embodiments, the housing 10 includes a bottom wall located on one side of the housing 10 along the third direction Z. The battery cell 20 is supported on the bottom wall, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. A heat exchange component 60 is connected between the battery cell 20 and the bottom wall.

[0213] In some embodiments, there are multiple channels 11 and multiple heat exchange components 60, and the multiple heat exchange components 60 and multiple channels 11 are arranged in a one-to-one correspondence.

[0214] Figure 16 This is a top view schematic diagram of another battery device provided in some embodiments of this application. Figure 17 for Figure 16 A schematic diagram of the cross-sectional structure along EE.

[0215] Continue to refer to Figures 16 to 17 In some embodiments, the housing 10 is also provided with a pressure relief channel 13, which connects the channel 11 and the external environment.

[0216] For example, the pressure relief channel 13 may be, but is not limited to, a straight, bent, or bifurcated channel.

[0217] When a single battery cell 20 releases gas due to a fault or thermal runaway during normal operation or charging / discharging, the pressure relief channel 13 can provide a fast and effective release path, avoiding the risk of the housing 10 expanding, cracking, or even exploding due to internal pressure accumulation, and significantly improving the reliability of the battery device 2.

[0218] Figure 18This is a top view schematic diagram of another battery device provided in some embodiments of this application.

[0219] Continue to refer to Figure 18 In some embodiments, the pressure relief channel 13 forms a first hole on the outer wall surface of the housing 10. The battery device 2 also includes a seal 70 connected to the housing 10 and sealing the first hole, the seal 70 being configured to release the seal on the first hole when the pressure within the channel 11 reaches a preset threshold.

[0220] For example, the first hole can be understood as the outlet of the pressure relief channel 13, used to release gas from inside the box 10 to the external environment when the gas pressure in the channel 11 rises abnormally.

[0221] The seal 70 can be detachably connected to the housing 10 or integrally mounted on the housing 10. The seal 70 can be directly connected to the housing 10 or constrained to the housing 10 by other components. As an example, the connection method between the seal 70 and the housing 10 can be, but is not limited to, snap-fit, plug-in, or adhesive.

[0222] Optionally, the seal 70 may be, but is not limited to, a sheet-like structure, a cap-like structure, or a membrane-like structure.

[0223] The seal 70 is designed to automatically release the seal on the first orifice when the internal pressure of the channel 11 reaches a preset threshold, thereby opening the pressure relief passage. This "release of the seal" can manifest as diaphragm rupture, rubber valve disengagement, or the sealing layer springing open, etc., and the specific design can be determined according to the usage environment.

[0224] In other words, the pressure relief channel 13 and the seal 70 together constitute a passively triggered pressure relief unit, which enables the battery device 2 to release internal pressure in a timely manner when encountering dangers such as gas expansion and thermal runaway, thereby reducing the risk of structural damage or explosion of the battery device 2 and improving the reliability of the battery device 2.

[0225] The preset threshold can be a specific value or a range of values, and can be set according to the actual application environment.

[0226] Optionally, the seal 70 may be a pressure relief valve, a pressure relief diaphragm, an elastic rubber plug, or an elastic rubber gasket, etc.

[0227] The above technical solution introduces a seal 70, which can seal the pressure relief channel 13 when the battery device 2 is operating normally, thereby reducing the risk of external impurities entering the pressure relief channel 13 and causing the pressure relief channel 13 to be blocked, thus further improving the reliability of the battery device 2.

[0228] According to some embodiments of this application, this application also provides an electrical device, including a battery device 2 of any of the above schemes, the battery device 2 being used to store or provide electrical energy.

[0229] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. All technical features and optional technical features of this application can be combined to form new technical solutions.

[0230] To better understand the battery device 2 provided in the embodiments of this application, based on the same inventive concept, an embodiment of the battery device 2 in practical application is provided here for description.

[0231] This application provides a battery device 2, which includes a housing 10, a battery cell assembly 200, and a current collector 30. The housing 10 has a channel 11 inside, which extends along a first direction X. One end of the housing 10 along the first direction X has a first opening 12a, which connects the channel 11 and the external environment of the battery device.

[0232] The battery cell assembly 200 includes at least one battery cell 20, which is housed within a channel 11. The battery cell assembly 200 is configured to move along a first direction X to enter or exit the channel 11 through a first opening 12a. The battery cell 20 includes an electrode terminal 21. A busbar assembly 30 is disposed within and fixedly connected to the housing 10. The busbar assembly 30 includes an insulating portion 31 and a conductive portion 32. The insulating portion 31 has a groove 33 on the side facing the electrode terminal 21. The insulating portion 31 is connected to the housing 10. The conductive portion 32 is exposed to the channel 11 and is disposed within the groove 33. At least a portion of the electrode terminal 21 is inserted into the groove 33 and contacts the conductive portion 32.

[0233] The battery cell assembly 200 includes a first state and a second state. In the first state, the electrode terminal 21 is electrically connected to the conductive part 32. In the second state, the electrode terminal 21 is separated from the conductive part 32. The battery cell assembly 200 can switch between the first state and the second state by moving along the channel 11.

[0234] Baffle 40 is detachably connected to housing 10 and closes the first opening 12a. Buffer 50 is disposed between baffle 40 and battery cell 20, and the elastic modulus of buffer 50 is less than that of baffle 40. Heat exchange component 60 is connected between battery cell 20 and the inner wall of channel 11.

[0235] With the above technical solution, when it is necessary to replace the battery cell 20, the battery cell 20 can be directly slid into or out of the channel 11 along the first direction X through the first opening 12a, without having to disassemble the entire battery device 2 or perform complex disassembly and assembly operations, thereby significantly improving the modularity and maintainability of the battery device 2. In addition, the installation and removal of the battery cell 20 by sliding along the channel 11 effectively reduces the difficulty of operation.

[0236] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0237] 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 housing has an internal channel that extends along a first direction. One end of the housing along the first direction has a first opening that connects the channel to the external environment of the battery device. A battery cell assembly includes at least one battery cell, the battery cell assembly is housed within the channel, the battery cell assembly is configured to move along the first direction to enter or exit the channel through the first opening, and the battery cell includes electrode terminals. A busbar component is disposed within the housing and connected to the housing. The busbar component includes a conductive part that is exposed to the channel. The electrode terminals are detachably connected to the conductive part. The battery cell assembly includes a first state and a second state. In the first state, the electrode terminals are electrically connected to the conductive portion. In the second state, the electrode terminals are separated from the conductive portion. The battery cell assembly can switch between the first state and the second state by moving along the channel. The housing has a second opening, and the first opening and the second opening are respectively located at both ends of the housing along the first direction. The second opening connects the channel and the external environment of the battery device. Each of the channels is provided with a plurality of battery cell assemblies. The plurality of battery cell assemblies located in the same channel include a first battery cell assembly and a second battery cell assembly. The first battery cell assembly and the second battery cell assembly are arranged opposite to each other along the first direction. The first battery cell assembly is configured to move along the first direction to enter or exit the channel from the first opening, and the second battery cell assembly is configured to move along the first direction to enter or exit the channel from the second opening. The busbar component is disposed within the channel, and the first battery cell assembly and the second battery cell assembly are respectively located on opposite sides of the busbar component along the first direction, and the electrode terminals of the first battery cell assembly and the electrode terminals of the second battery cell assembly are detachably connected to the conductive part.

2. The battery device according to claim 1, characterized in that, The busbar component also includes an insulating part connected to the housing, and the insulating part has a groove on the side facing the electrode terminal; The conductive part is disposed in the groove, and at least a portion of the electrode terminal is inserted into the groove and contacts the conductive part.

3. The battery device according to claim 2, characterized in that, The busbar component further includes a first snap-fit ​​portion, which is disposed on the insulating portion and located within the groove; The electrode terminal is provided with a second snap-fit ​​portion corresponding to the first snap-fit ​​portion, and the first snap-fit ​​portion is used to snap-fit ​​with the second snap-fit ​​portion.

4. The battery device according to claim 1, characterized in that, The battery device also includes a baffle that is detachably connected to the housing and closes the first opening.

5. The battery device according to claim 4, characterized in that, The battery device further includes a buffer element disposed between the baffle and the battery cell, wherein the elastic modulus of the buffer element is less than that of the baffle.

6. The battery device according to claim 1, characterized in that, The number of channels and battery cell components are both multiple, and the multiple channels are spaced apart along the second direction, where the first direction intersects the second direction; Each of the channels is provided with at least one of the battery cell components.

7. The battery device according to claim 6, characterized in that, Each of the battery cell assemblies includes a plurality of battery cells, wherein the plurality of battery cells are arranged along the second direction and the electrode terminals of the plurality of battery cells are all facing the busbar.

8. The battery device according to claim 7, characterized in that, In each of the battery cell assemblies, any two adjacent battery cells are fixedly connected.

9. The battery device according to claim 1, characterized in that, The housing includes a first wall, which is disposed opposite to the first opening along the first direction. The current-collecting component is connected to the side of the first wall facing the battery cell assembly, and the electrode terminal is detachably connected to the side of the conductive part facing away from the first wall.

10. The battery device according to claim 1, characterized in that, The busbar component includes a first busbar component and a second busbar component, wherein the first busbar component and the second busbar component are arranged along the first direction; The first busbar is oriented toward the first battery cell assembly along the first direction, and the second busbar is oriented toward the second battery cell assembly along the first direction; The electrode terminals of the first battery cell assembly are detachably connected to the conductive portion of the first busbar component, and the electrode terminals of the second battery cell assembly are detachably connected to the conductive portion of the second busbar component.

11. The battery device according to claim 1, characterized in that, The battery device further includes a heat exchange component connected between the battery cell and the inner wall of the channel.

12. The battery device according to claim 1, characterized in that, The enclosure is also provided with a pressure relief channel, which connects the channel to the external environment.

13. The battery device according to claim 12, characterized in that, The pressure relief channel forms a first hole on the outer wall surface of the housing; The battery device further includes a seal connected to the housing and sealing the first hole, the seal being configured to release the seal on the first hole when the pressure within the channel reaches a preset threshold.

14. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-13, the battery device being used to store or provide electrical energy.

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