Battery device and electric device

Abstract

A battery device (100) and an electric device. The battery device (100) comprises: a battery cell component (1), which comprises at least one battery cell (11); a case assembly (2), which comprises a case (21) and a cover plate (22), wherein the case (21) is provided with an opening (211), the cover plate (22) covers the opening (211) to form a first accommodating space (10) together with the case (21), and the battery cell component (1) is located in the first accommodating space (10); an electrical component (3); and a first plate member (4), which is provided on the side of the cover plate (22) away from the first accommodating space (10), wherein the first plate member (4) covers the cover plate (22) to form a second accommodating space (20), and the electrical component (3) is located in the second accommodating space (20). The cover plate (22) protrudes toward the second accommodating space (20) to form a protrusion (221), and the surface of the protrusion (221) facing the first accommodating space (10) is recessed to form a groove (222), which facilitates improvement to the space utilization rate of the battery device (100), such that the structure of the battery device (100) is more compact, and the energy density of the battery device (100) is also improved.

Description

Battery devices and electrical appliances Technical Field

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

[0002] With the promotion and popularization of the concept of green development, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are being used more and more in the field of energy storage.

[0003] As the industry continues to demand higher requirements for battery device volume utilization and lightweight design, there is a trend towards miniaturization and thinning of battery devices. In this context, improving the space utilization of battery devices is one of the research directions of the industry.

[0004] Summary of the Invention

[0005] In view of this, the present disclosure aims to provide a battery device and an electrical device with high space utilization.

[0006] To achieve the above objectives, the present disclosure adopts the following technical solution.

[0007] A first aspect of this disclosure provides a battery device, comprising: a battery cell assembly including at least one battery cell; a housing assembly including a housing and a cover plate, the housing having an opening, the cover plate closing onto the opening to form a first receiving space together with the housing, the battery cell assembly being located in the first receiving space; an electrical component; a first plate disposed on a side of the cover plate opposite to the first receiving space, the first plate being disposed on the cover plate to form a second receiving space, the electrical component being located in the second receiving space; wherein the cover plate protrudes toward the second receiving space to form a protrusion, and a groove is formed on the surface of the protrusion toward the first receiving space.

[0008] Because the battery cells are located within the first accommodating space, and the electrical components are located in the second accommodating space away from the first accommodating space, the electrical components can be placed separately from the battery cells. This prevents the electrical components from occupying the space containing the battery cells, thereby improving the regularity of the first accommodating space. The first accommodating space within the housing can then solely accommodate the battery cells, allowing for a more compact arrangement of the battery cells. This improves the energy density of the battery device without changing the volume of the first accommodating space. Furthermore, the shape and size of the first plate can be customized according to the actual needs of the electrical components, thus requiring only a small portion of the space above the cover to form the second accommodating space for the electrical components. This avoids occupying the entire space above the cover, facilitating battery device installation and improving space utilization.

[0009] Furthermore, since the cover plate protrudes towards the second receiving space to form a protrusion, and the surface of the protrusion is recessed towards the first receiving space to form a groove, at least some structural components, busbars, etc. used to connect the battery cell assembly can be accommodated in the space of the groove formed by the protrusion. This helps to reduce the occupation of these structural components, busbars, etc. in the first receiving space, further improves the regularity of the first receiving space, and further improves the energy density of the battery device without changing the volume of the first receiving space.

[0010] In some embodiments, the first plate is disposed on the cover plate along a first direction, and the electrical component includes a first electrical element and a second electrical element. The maximum dimension of the first electrical element along the first direction is smaller than the maximum dimension of the second electrical element along the first direction. The first electrical element is projected onto a projection plane perpendicular to the first direction along the first direction. The projection of the first electrical element at least partially coincides with the projection of the protrusion, and the projection of the second electrical element is completely misaligned with the protrusion.

[0011] This allows the smaller first electrical component along the first direction to be arranged on the protrusion, while the larger second electrical component along the first direction is arranged outside the protrusion. This makes the overall height of the electrical assembly more uniform, and prevents the electrical assembly from occupying too much space along the first direction. This makes the space utilization of the second area more reasonable. In this way, while arranging the electrical components, the size of the first plate along the first direction is not too large, which is beneficial to the integration and miniaturization of the battery device.

[0012] In some embodiments, the first electrical component is a resistor, and the second electrical component is a fuse or a relay.

[0013] Therefore, based on the dimensions of different electrical components along the first direction, electrical components such as resistors, fuses, and relays can be rationally arranged in the second accommodating space, improving the regularity of the second accommodating space and increasing the space utilization rate of the battery device.

[0014] In some embodiments, the electrical component includes a plurality of electrical elements, at least two of which have a first spacing space in a second direction, the second direction being perpendicular to the first direction, and projected onto a projection plane perpendicular to the first direction along the first direction, the projection of the first spacing space covering at least a portion of the projection of the protrusion.

[0015] This allows the protrusion to make reasonable use of part of the second accommodating space without affecting the arrangement of electrical components, making the overall layout of the battery device more compact and regular, which is conducive to improving the space utilization of the battery device and facilitating the miniaturization of the battery device.

[0016] In some embodiments, the electrical component includes a plurality of electrical elements, at least a portion of which are arranged in a first region, and at least another portion of which are arranged in a second region. The first region and the second region have a second spacing space in a second direction perpendicular to the first direction. The projection of the second spacing space onto a projection plane perpendicular to the first direction along the first direction covers at least a portion of the projection of the protrusion.

[0017] This allows the protrusion to make reasonable use of part of the second accommodating space without affecting the arrangement of electrical components, making the overall layout of the battery device more compact and regular, which is conducive to improving the space utilization of the battery device and facilitating the miniaturization of the battery device.

[0018] In some embodiments, the battery device further includes an electrical connector for connecting electrical components located in the first region and the second region, respectively, with at least a portion of the electrical connector located within the second space.

[0019] This allows the electrical connectors used to connect electrical components in the two areas to make full use of at least a portion of the second space, resulting in a more rational layout of the overall electrical components and connectors, thereby reducing space waste and appropriately reducing the size of the second accommodating space.

[0020] In some embodiments, the battery device further includes a carrier for carrying the electrical component located in the first region, the carrier protruding in a direction away from the first receiving space to form a receiving portion on a surface facing the first receiving space, at least a portion of the protrusion being located within the receiving portion.

[0021] This allows electrical components in the first region to be integrated onto the carrier, thereby increasing the integration level of the electrical components and saving space. Furthermore, the carrier has a receiving portion; the cooperation between the protrusion and the receiving portion reduces the distance between the protrusion and the carrier, preventing the carrier from occupying excessive space in the height direction (first direction). This helps save space in the second receiving space along the first direction, further facilitating the miniaturization and integration of the battery device.

[0022] In some embodiments, the battery device further includes a carrier for carrying at least a portion of the electrical component, the carrier projecting toward a direction away from the first receiving space to form a receiving portion on a surface toward the first receiving space, at least a portion of the projecting portion being located within the receiving portion.

[0023] This allows at least some electrical components to be integrated onto the carrier, thereby increasing the integration level of the electrical components and saving space occupied by them. Furthermore, the carrier has a receiving portion; the cooperation between the protrusion and the receiving portion reduces the distance between the protrusion and the carrier, preventing the carrier from occupying excessive space in the height direction (first direction). This helps save space along the first direction of the second receiving space, further facilitating the miniaturization and integration of the battery device.

[0024] In some embodiments, the first plate includes a plurality of sidewall portions connected to the cover plate, and a third gap space is provided between the electrical component and at least one of the plurality of sidewall portions, and the projection is projected onto a projection plane perpendicular to the first direction along the first direction, the projection of the third gap space covering at least a portion of the projection of the protrusion.

[0025] This allows the first plate to at least partially cover the protrusion, enabling the protrusion to partially extend into the area within the second receiving space formed by the first plate and the cover, thereby helping to reduce the overall size of the battery device along the first direction.

[0026] In some embodiments, the projection is directed onto a projection plane perpendicular to the first direction along the first direction, and at least a portion of the projection of the protrusion is located outside the projection of the first plate.

[0027] Therefore, the protruding part utilizes the area of ​​the second accommodating space formed between the first plate and the cover plate. While not affecting the function of each electrical component, it saves a certain amount of redundant space, which is conducive to improving the overall space utilization of the battery device, and is more conducive to the miniaturization and integration of the battery device. Alternatively, it can help improve the energy density of the battery device without changing the overall volume of the battery device.

[0028] In some embodiments, the first plate is provided with a clearance groove, and at least a portion of the protrusion passes through the clearance groove.

[0029] This allows the first plate to be positioned reasonably and adequately above the cover plate with the protrusion, thereby making the second accommodating space relatively sealed. External dust, foreign objects, etc., are not easily allowed to enter the interior of the second accommodating space, so that the first plate can play a good protective role for the electrical components in the second accommodating space.

[0030] In some embodiments, the groove forms an installation space, the opening of the groove facing the first receiving space so that the first receiving space communicates with the installation space; the battery device includes a first component located within the installation space, at least a portion of the first component being located within the groove.

[0031] Therefore, at least some structural components, busbars, etc. used to connect the individual battery cells in the battery cell assembly can be accommodated in the mounting space of the groove, which helps to reduce the occupation of the first accommodating space by these structural components, busbars, etc., improves the regularity of the first accommodating space, and further improves the energy density of the battery device without changing the volume of the first accommodating space.

[0032] In some embodiments, the battery device includes a busbar and a sampling component. The battery cell assembly has an electrode lead-out portion. The busbar is connected to the electrode lead-out portion. The sampling component is used to connect to the battery cell assembly to obtain information about the battery cell assembly. The first component includes at least one of the electrode lead-out portion, the busbar, and the sampling component.

[0033] This reduces the space occupied by one or more of the electrode leads, busbars, and sampling components, making the space inside the housing for placing the battery cells more regular and the battery device structure more compact.

[0034] In some embodiments, the first component includes the electrode lead-out portion, at least a portion of which is located within the groove.

[0035] The electrode lead-out portion is at least partially located within the groove, thereby allowing the main body portion of the battery cell assembly other than the electrode lead-out portion to be positioned closer to the inner wall of the cover plate, thus improving the space utilization rate of the first accommodating space. Without changing the volume of the first accommodating space, the volume of the main body portion of the battery cell assembly can be appropriately increased, which is beneficial to improving the energy density of the battery device.

[0036] In some embodiments, the battery cell assembly includes a first battery cell assembly, the first battery cell assembly including a first electrode lead and a second electrode lead, the groove including a first groove, and both the first electrode lead and the second electrode lead being at least partially located in the first groove.

[0037] This allows the first electrode lead and the second electrode lead to be at least partially displaced within the same groove, thereby improving the space utilization of the first groove, reducing the overall number of grooves, and helping to reduce the processing difficulty of the cover plate, thus lowering production costs. Furthermore, it facilitates the arrangement of the sampling components, making it easier for the sampling components to simultaneously collect information from both the first and second electrode leads.

[0038] In some embodiments, the length of the first groove is greater than its width, and the distance between the farthest points of the first electrode lead and the second electrode lead along the width direction of the first groove is less than half of the maximum dimension of the first battery cell assembly along the width direction of the first groove.

[0039] This allows for a more compact arrangement of the first and second electrode leads on the first battery cell assembly, which helps reduce the size of the protrusions and the overall outer contour of the battery cell assembly, thus facilitating the miniaturization of the battery device. Furthermore, the concentrated arrangement of the first and second electrode leads allows for more flat space to be reserved in the remaining areas of the battery cell assembly, excluding the electrode leads. This facilitates the arrangement of other components within the battery cell assembly, further improving the compactness of the battery device.

[0040] In some embodiments, the sampling component includes a first sampling component electrically connected to the first battery cell assembly, at least a portion of which is located in the first groove.

[0041] Therefore, the first sampling component can simultaneously sample the first electrode lead-out and the second electrode lead-out located in the first groove, which makes sampling by the first sampling component easier and also saves the number of sampling components.

[0042] In some embodiments, the length of the first groove is greater than its width, and a projection plane perpendicular to the length of the first groove is projected along the length of the first groove, wherein the first electrode lead-out portion and the second electrode lead-out portion have at least partial projection overlap.

[0043] Therefore, the first electrode lead and the second electrode lead are roughly on the same horizontal line along the length of the groove, which can reduce the distance between the electrode lead and the edge of the groove along the width of the groove. This helps to reduce the size of the groove along the width of the groove and the size of the battery cell assembly along the width of the groove, thereby improving the compactness of the battery device.

[0044] In some embodiments, the length of the first groove is greater than its width, the first battery cell assembly includes a first edge and a second edge disposed opposite to each other along the width direction of the first groove, the maximum distance between the first electrode lead and the first edge is less than the maximum distance between the first electrode lead and the second edge, and the maximum distance between the second electrode lead and the first edge is less than the maximum distance between the second electrode lead and the second edge.

[0045] This design allows both the first electrode lead-out portion and the second electrode lead-out portion to be positioned close to the first edge. With the overall size of the battery cell assembly remaining unchanged, a larger flat space can be formed on the side of the battery cell assembly near the second edge, thereby reserving more space for arranging sampling components, busbars, etc., and improving the flexibility of the arrangement.

[0046] In some embodiments, the first battery cell assembly includes a first edge and a second edge disposed opposite to each other along the groove width direction of the first groove, and the sampling assembly includes a first sampling component electrically connected to the first battery cell assembly, the first sampling component being located between the first electrode lead and the second electrode lead, the one closer to the second edge, and the second edge.

[0047] Therefore, the first sampling component can simultaneously sample the first electrode lead-out portion and the second electrode lead-out portion of the first battery cell assembly, and the first sampling component can be located in a large flat space near the second edge side of the first battery cell assembly, making full use of the flat area and improving the space utilization rate of the battery device.

[0048] In some embodiments, the battery device further includes a first busbar for electrically connecting a first electrode lead to electrode leads on other battery cell assemblies, at least a portion of the first busbar being located in the first recess.

[0049] This ensures that the first busbar does not occupy too much space within the battery cell assembly, further improving the regularity of the first assembly space. Without changing the volume of the first assembly space, this helps to increase the energy density of the battery device.

[0050] A second aspect of this disclosure provides an electrical device comprising a battery device as claimed in any one of claims 1-21, the battery device being used to provide electrical energy to the electrical device.

[0051] Because the electrical device uses a battery device with a compact structure and high space utilization rate as described above, the battery device occupies less space in the electrical device without affecting the energy density of the battery device. This is beneficial for the arrangement of other components in the electrical device and improves the space utilization rate of the electrical device.

[0052] In some embodiments, the electrical device is a vehicle, the vehicle further comprising a seat, at least a portion of the second accommodating space being located beneath the seat.

[0053] Therefore, integrating electrical components into the second housing space can save the space occupied by the electrical components, so that the second housing space for accommodating electrical components can be located at least partially under the seat, making full use of the space under the vehicle seat and improving space utilization.

[0054] The beneficial effects of the embodiments disclosed herein include: providing a battery device and an electrical device with high space utilization. Attached Figure Description

[0055] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this disclosure;

[0056] Figure 2 is an exploded view of the structure of a battery device provided in an embodiment of this disclosure;

[0057] Figure 3 is a schematic diagram of the battery device installation position of a vehicle provided in an embodiment of this disclosure;

[0058] Figure 4 is a schematic diagram of the structure of a battery device provided in an embodiment of this disclosure;

[0059] Figure 5 is an exploded view of the structure of a battery device provided in an embodiment of this disclosure;

[0060] Figure 6 is a schematic diagram of the structure of a battery device provided in another embodiment of this disclosure;

[0061] Figure 7 is an exploded view of the structure of a battery device provided in another embodiment of this disclosure;

[0062] Figure 8 is a cross-sectional view at point AA in Figure 4;

[0063] Figure 9 is a cross-sectional view at point BB in Figure 6;

[0064] Figure 10 is a schematic diagram of the internal structure of a battery device provided in an embodiment of the present disclosure;

[0065] Figure 11 is a partial schematic diagram of point C in Figure 10.

[0066] Explanation of reference numerals in the attached figures

[0067] 1-Battery cell assembly; 1a-First battery cell assembly; 10a-First edge; 20a-Second edge; 11-Battery cell; 12-Electrode lead; 121-First electrode lead; 122-Second electrode lead; 2-Casing assembly; 21-Casing; 211-Opening; 22-Cover plate; 221-Protrusion; 222-Recess; 222a-First recess; 2221-Mounting space; 3-Electrical assembly; 31-First electrical component; 32-Second electrical component; 33-Electrical component; 4-First plate ; 41-Side wall portion; 42-Avoidance groove; 5-Electrical connector; 6-Bearing member; 61-Accommodation portion; 7-First component; 8-Bus unit; 81-First busbar; 9-Sampling assembly; 91-First sampling assembly; 10-First accommodating space; 20-Second accommodating space; 201-First area; 202-Second area; 30-First interval space; 40-Second interval space; 50-Third interval space; 100-Battery device; 200-Controller; 300-Motor; 1000-Vehicle; 1001-Seat. Detailed Implementation

[0068] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this disclosure can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this disclosure and should not be regarded as undue limitations on this disclosure.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0070] In the description of this disclosure, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0071] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] In the description of this disclosure, 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, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0073] In the description of the embodiments of this disclosure, the technical terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.

[0074] In the description of this disclosure, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0075] In the description of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" shall be interpreted broadly and may refer to direct contact, contact through an intermediate medium, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0076] In the description of embodiments of this disclosure, unless otherwise expressly specified and limited, the technical terms "parallel" and "perpendicular" are subject to a certain degree of tolerance and / or error, including cases of being substantially parallel and substantially perpendicular.

[0077] The following is a detailed description of this disclosure.

[0078] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0079] Battery devices typically include a housing, individual battery cells, and electrical components. In related technologies, the housing is usually a regular cuboid or cube shape, and typically has two parallel layers of storage space. The individual battery cells are located in the lower layer, and the electrical components are located in the upper layer. For electrical safety when arranging the electrical components, more space is usually reserved in the height direction (the first direction), resulting in a larger upper layer and thus an increased housing size. This, in turn, increases the size of the battery device, making it difficult to install in space-constrained electrical applications. If the housing size is not changed, the space available for the individual battery cells will be reduced, thereby decreasing the energy density of the battery device.

[0080] However, electrical components typically do not fill the entire upper space in the horizontal direction (second direction), which results in a waste of some space inside the enclosure, low space utilization, and is not conducive to reducing the size of the battery device, and thus not conducive to improving the energy density of the battery device.

[0081] This disclosure addresses the problems existing in the aforementioned related technologies by proposing a battery device, comprising a battery cell assembly, a housing assembly, an electrical assembly, and a first plate. The battery cell assembly includes at least one battery cell. The housing assembly includes a housing and a cover plate. The housing has an opening, and the cover plate closes to the opening to form a first receiving space together with the housing, where the battery cell assembly is located. The first plate is disposed on the side of the cover plate opposite to the first receiving space, and the first plate covers the cover plate to form a second receiving space, where the electrical assembly is located. The cover plate protrudes towards the second receiving space to form a protrusion, and a groove is formed on the surface of the protrusion facing the first receiving space.

[0082] Since the battery cell assembly is located in the first accommodating space and the electrical assembly is located in the second accommodating space away from the first accommodating space, the electrical assembly and the battery cell assembly can be placed separately. This allows the electrical assembly to not occupy the space that accommodates the battery cell assembly, thereby improving the regularity of the first accommodating space. The first accommodating space inside the box can only accommodate the battery cell assembly, and the battery cell assembly located in the first accommodating space can be arranged more compactly. Without changing the volume of the first accommodating space, this helps to improve the energy density of the battery device.

[0083] Moreover, the first plate can be shaped and sized according to the electrical components that need to be arranged, so that only a small part of the space above the cover plate is occupied to form a second receiving space to accommodate the electrical components, without having to occupy the entire space above the cover plate. This makes it easier to install the battery device and helps to improve the space utilization of the battery device.

[0084] Furthermore, since the cover plate protrudes towards the second receiving space to form a protrusion, and the surface of the protrusion is recessed towards the first receiving space to form a groove, at least some structural components, busbars, etc. used to connect the battery cell assembly can be accommodated in the space of the groove formed by the protrusion. This helps to reduce the occupation of these structural components, busbars, etc. in the first receiving space, further improves the regularity of the first receiving space, and further improves the energy density of the battery device without changing the volume of the first receiving space.

[0085] The battery device provided in this disclosure can be used, but is not limited to, in energy storage power systems, vehicles, ships or aircraft, and in energy storage devices such as energy storage containers and energy storage cabinets.

[0086] This disclosure provides an electrical device including the aforementioned battery device for providing electrical energy. The electrical device includes, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. 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.

[0087] The following describes some embodiments of the present disclosure in detail with reference to Figures 1 to 11.

[0088] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present disclosure; Figure 2 is an exploded structural schematic diagram of a battery device provided in an embodiment of the present disclosure; Figure 3 is a schematic diagram of the battery device installation position of a vehicle provided in an embodiment of the present disclosure; Figure 4 is a structural schematic diagram of a battery device provided in an embodiment of the present disclosure; Figure 5 is an exploded structural schematic diagram of a battery device provided in an embodiment of the present disclosure; Figure 6 is a structural schematic diagram of a battery device provided in another embodiment of the present disclosure; Figure 7 is an exploded structural schematic diagram of a battery device provided in another embodiment of the present disclosure; Figure 8 is a cross-sectional view at AA in Figure 4; Figure 9 is a cross-sectional view at BB in Figure 6; Figure 10 is a schematic diagram of the internal structure of a battery device provided in an embodiment of the present disclosure; Figure 11 is a partial schematic diagram at C in Figure 10.

[0089] In some embodiments of this disclosure, for ease of explanation, a first direction and a second direction are defined, which are perpendicular to each other. However, those skilled in the art should understand that the embodiments of this disclosure are not limited to the case where the two directions are perpendicular to each other. For ease of explanation, as shown by the arrows in Figures 1 to 11, the direction where arrow Z is located is the first direction, the direction where arrow X is located represents the length direction of the cover plate, and the direction where arrow Y is located represents the width direction of the cover plate. The second direction can be either the length direction or the width direction of the cover plate. Sometimes, the direction indicated by arrow Z along the first direction is referred to as "above," and its opposite direction is referred to as "below."

[0090] The first aspect of this disclosure provides a battery device 100, as shown in Figures 2, 4 to 7. The battery device 100 includes a battery cell assembly 1, a housing assembly 2, an electrical component 3, and a first plate 4. The battery cell assembly 1 includes at least one battery cell 11. The housing assembly 2 includes a housing 21 and a cover plate 22. The housing 21 has an opening 211, and the cover plate 22 closes to the opening 211 to form a first receiving space 10 together with the housing 21. The battery cell assembly 1 is located in the first receiving space 10. The first plate 4 is disposed on the side of the cover plate 22 opposite to the first receiving space 10, and the first plate 4 covers the cover plate 22 to form a second receiving space 20. The electrical component 3 is located in the second receiving space 20. The cover plate 22 protrudes toward the second receiving space 20 to form a protrusion 221, and a groove 222 is formed on the surface of the protrusion 221 toward the first receiving space 10.

[0091] The battery cell 11 refers to a unit that can convert chemical energy and electrical energy into each other. It can be used to make a battery cell assembly 1 or a battery device 100, so as to supply power to electrical devices or energy storage devices.

[0092] The battery device 100 mentioned in this disclosure embodiment may include one or more battery cell assemblies 1 for providing voltage and capacity. The battery cell assembly 1 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0093] In this embodiment of the disclosure, the battery cell 11 is a secondary battery cell, which refers to a battery cell that can be used again after being discharged by recharging to activate the active materials.

[0094] The battery cell 11 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., and this embodiment does not limit it.

[0095] The battery cell 11 includes a casing and an electrode assembly.

[0096] The casing is the external protective shell of a battery cell, with an internal cavity for encapsulating components such as electrodes and electrolytes. The casing can be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0097] Electrode assemblies are the components within a single battery cell where electrochemical reactions occur. Electrode assemblies are typically stacked along the thickness direction (layer direction) of the battery cell.

[0098] The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrode plates. The separator, positioned between the positive and negative electrode plates, prevents short circuits while allowing active ions to pass through.

[0099] In some embodiments, the positive electrode sheet may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0100] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0101] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, silver-treated aluminum or stainless steel, copper, nickel, or titanium can be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0102] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this disclosure is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium manganese iron phosphate, and lithium manganese iron phosphate and carbon composites.

[0103] In some embodiments, the positive electrode may be made of foamed metal. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, or a foamed alloy, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal may also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0104] In some embodiments, the negative electrode may include a negative current collector.

[0105] As an example, the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be silver-treated aluminum or stainless steel, copper, nickel, carbon, or titanium. The composite current collector may include a polymer material base layer and a metal layer. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or foamed alloys. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0106] In some embodiments, the separator is a separator membrane. This disclosure does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0107] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride, and ceramic.

[0108] In some implementations, the separator is a solid electrolyte.

[0109] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0110] In some implementations, the electrode assembly is a stacked structure.

[0111] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0112] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0113] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0114] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0115] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0116] In some embodiments, the battery cell 11 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This disclosure does not impose specific limitations on the type of electrolyte, which can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0117] In some embodiments, the electrode assembly is provided with tabs that can either draw current from or introduce current into the electrode assembly. The tabs include positive and negative tabs.

[0118] In the battery device 100, there can be multiple battery cells 11, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel configurations. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of multiple battery cells 11 is placed inside the housing assembly 2. Alternatively, multiple battery cells 11 can first be connected in series, parallel, or in a mixed configuration to form a battery cell assembly 1, and then the battery cell assemblies 1 can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 2. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar, which connects the electrode leads of adjacent battery cells 11 or adjacent battery cell assemblies 11 to achieve electrical connection between multiple battery cells 11 or multiple battery cell assemblies 1. The busbar can also be called a connecting plate.

[0119] As shown in Figure 2, the housing assembly 2 is a structure for housing the battery cell 11. The housing assembly 2 includes a housing 21 and a cover plate 22. The housing 21 has an opening 211, and the cover plate 22 covers the opening 211, thereby forming a closed first housing space 10 between the housing 21 and the cover plate 22. The first housing space 10 is used to accommodate the battery cell assembly 1. Here, "closed" means covered or closed, which can be sealed or unsealed.

[0120] As an example, the housing assembly 2 can be part of the vehicle's chassis structure. For instance, the cover plate 22 can be at least part of the vehicle's floor, or the housing can be at least part of the vehicle's crossbeams and longitudinal beams.

[0121] In this embodiment, the housing assembly 2 is generally rectangular. In some other embodiments, the housing assembly 2 may also be any other suitable shape such as a cube or cylinder. This embodiment does not specifically limit the shape of the housing assembly 2, as long as it can accommodate the battery cell assembly 1.

[0122] In this embodiment, the electrical component 3 includes at least a power distribution unit (PDU) and a battery management system (BMS). The power distribution unit is a control unit for distributing energy to the battery device 100, and is used for high-voltage distribution, overload protection, and short-circuit protection of the battery device 100. The battery management system is used to determine the operating state of the battery device 100 and adjust the charging and discharging states of the battery device.

[0123] The first plate 4 is disposed on the side of the cover plate 22 opposite to the first receiving space 10, and together with the cover plate 22 forms a second receiving space 20 for receiving the electrical component 3. The second receiving space 20 is relatively independent of the first receiving space 10. In this embodiment, the first plate 4 is generally cuboid in shape and is disposed above the cover plate 22, acting as an outer cover for the second receiving space 20 to protect the electrical component 3 located within the second receiving space 20. In some other embodiments, the first plate 4 may also be any other suitable shape, as long as it can cover the electrical component 3.

[0124] For example, the first plate 4 may be formed as an integral structural member by stamping a plate-shaped piece.

[0125] As another example, the first plate 4 can be composed of multiple separate plate-shaped parts joined together.

[0126] This disclosure does not specifically limit the molding process and materials of the first plate 4.

[0127] Since the battery cell assembly 1 is located in the first accommodating space 10 and the electrical assembly 3 is located in the second accommodating space 20 away from the first accommodating space 10, the electrical assembly 3 and the battery cell assembly 1 can be placed separately, so that the electrical assembly 3 does not occupy the space that accommodates the battery cell assembly 1. This helps to improve the regularity of the first accommodating space 10, so that the first accommodating space 10 in the housing 21 only accommodates the battery cell assembly 1, and the arrangement of the battery cell assembly 1 in the first accommodating space 10 can be more compact. Without changing the volume of the first accommodating space 10, it is beneficial to improve the energy density of the battery cell assembly 1.

[0128] Moreover, since the first accommodating space 10 and the second accommodating space 20 are relatively independent, and the arrangement of the electrical components 3 is relatively flexible, the first plate 4 can be set to the shape and size according to the electrical components 3 that need to be arranged, so that only a small part of the space above the cover plate 22 is occupied to form the second accommodating space 20 to accommodate the electrical components 3, without having to occupy the entire space above the cover plate 22, which makes it easier to install the battery device 100 and helps to improve the space utilization of the battery device 100.

[0129] For example, as shown in Figures 4 and 6, the electrical component 3 can be integrated into the end of the cover plate 22 along its length direction (X). Thus, the first plate 4 only needs to be placed on the end of the cover plate 22, forming a second receiving space 20 with a larger dimension along the first direction to accommodate the integrated electrical component 3. This ensures that the area of ​​the cover plate 22 other than that covered by the first plate 4 is not occupied; that is, the dimension of the remaining area along the first direction does not need to be too large, thereby reducing space waste, facilitating the miniaturization of the battery device 100, and making the installation of the battery device 100 easier. If the overall size of the battery device 100 remains unchanged, more space can be reserved for the first receiving space 10, thereby improving the energy density of the battery device 100.

[0130] Of course, those skilled in the art should understand that the embodiments disclosed herein do not specifically limit the location of the second receiving space 20. For example, the second receiving space 20 may also be located in the middle region of the cover plate 22, and the integration position of the electrical components 3 and the position of the second receiving space may be changed according to the actual installation position required by the battery device 100.

[0131] In this embodiment, the cover plate 22 protrudes towards the second receiving space 20, forming a protrusion 221, and the protrusion 221 is recessed towards the surface of the first receiving space 10, forming a groove 222. Thus, at least some structural components, busbars, etc., used for connecting the battery cell assembly 1 within the first receiving space 10 can be accommodated within the space of the groove 222 formed by the protrusion 221. This helps to reduce the occupancy of these structural components, busbars, etc., in the first receiving space 10, further improving the regularity within the first receiving space 10, and further increasing the energy density of the battery cell assembly 1 without changing the volume of the first receiving space 10.

[0132] For example, the cover plate 22 can be stamped by a stamping process, and protrusions 221 and grooves 222 are formed on both sides of the transplant cover plate 22.

[0133] Those skilled in the art should understand that the present disclosure does not specifically limit the number of protrusions 221. There may be only one, or there may be two, three or more, which can be specifically set according to the arrangement of the battery cell assembly 1 in the first accommodating space 10.

[0134] Furthermore, the present disclosure does not specifically limit the extension direction of the protrusion 221. The protrusion 221 may extend along the length direction of the cover plate 22 or along the width direction of the cover plate 22.

[0135] In some embodiments of this disclosure, as shown in Figures 4 to 7, a first plate 4 is disposed on a cover plate 22 along a first direction. The electrical component 3 includes a first electrical element 31 and a second electrical element 32. The maximum dimension of the first electrical element 31 along the first direction is smaller than the maximum dimension of the second electrical element 32 along the first direction. The projection of the first electrical element 31 onto a projection plane perpendicular to the first direction is at least partially coincident with the projection of the protrusion 221, and the projection of the second electrical element 32 is completely misaligned with the protrusion 221.

[0136] Since the cover plate 22 has a protrusion 221, when the first plate 4 is placed on the cover plate 22, at least part of the protrusion 221 can extend into the area covered by the first plate 4, that is, into the second receiving space 20. Thus, the second receiving space 20 can be used to accommodate at least part of the protrusion 221, improving the space utilization of the battery device 100. It also makes the area above the cover plate 22, except for the area covered by the first plate 4, relatively flat, which is more conducive to arranging other components.

[0137] However, the fact that at least part of the protrusion 221 extends into the second receiving space 20 will also cause a height difference along the first direction to be formed in the second receiving space 20. Therefore, it may cause the size of the first plate 4 to increase along the first direction, which is not conducive to reducing the size of the battery device 100.

[0138] Electrical components 3 are typically composed of multiple electrical elements of different types, shapes, and sizes. Therefore, in this embodiment, within the second accommodating space 20, the first electrical element 31, which has a smaller size along the first direction, can be at least partially arranged on the protrusion 221, while the second electrical element 32, which has a larger size along the first direction, can be arranged outside the protrusion 221, that is, on the non-protruding part of the cover plate 22, offset from the protrusion 221. This makes the overall height of electrical components 3 within the second accommodating space 20 more uniform, reducing the possibility of electrical elements on the protrusion 221 occupying too much space along the first direction. Consequently, the first plate 4 does not need to reserve too much space along the first direction, making the space utilization of the second region 202 more reasonable. In this way, while fully arranging electrical components 3, the size of the first plate 4 along the first direction is not too large, which is beneficial to the integration and miniaturization of the battery device 100.

[0139] In some embodiments of this disclosure, the first electrical component 31 is a resistor, and the second electrical component 32 is a fuse or a relay.

[0140] Resistors are typically smaller in size along the first direction, while fuses or relays are larger in size along the first direction relative to resistors. Therefore, resistors can be arranged at least partially on the protrusion 221, while fuses or relays are arranged separately from the protrusion 221. This allows electrical components 3 such as resistors, fuses, and relays to be arranged more rationally within the second receiving space 20, improving the regularity within the second receiving space 20 and increasing the space utilization of the battery device 100.

[0141] Of course, those skilled in the art should understand that the first electrical component 31 does not only include resistors, and the second electrical component 32 does not only include fuses or relays; the first electrical component 31 and the second electrical component 32 may also include any other electrical components.

[0142] In some embodiments of this disclosure, as shown in FIG8, the electrical component 3 includes a plurality of electrical elements 33, at least two of which have a first spacing space 30 in a second direction, the second direction being perpendicular to the first direction, and projected onto a projection surface perpendicular to the first direction along the first direction, the projection of the first spacing space 30 covering at least a portion of the projection of the protrusion 221.

[0143] As a result, the protrusion 221 can reasonably utilize part of the area within the second accommodating space 20 without affecting the arrangement of electrical components 33, making the overall layout of the battery device 100 more compact and regular, which is conducive to improving the space utilization of the battery device 100 and to miniaturizing the battery device 100.

[0144] For example, at least two of the plurality of electrical components 33 may be located in the second receiving space 20 at the protrusion 221 and at a location outside the protrusion 221, respectively.

[0145] As another example, at least two of the plurality of electrical components 33 may be located on opposite sides of the protrusion 221 along the second direction, such that the protrusion 221 is located in the first gap space 30 between the at least two electrical components 33.

[0146] As another example, at least two of the plurality of electrical components 33 may be arranged at intervals along the second direction on the protrusion 221.

[0147] In some embodiments of this disclosure, as shown in FIG9, the electrical component 3 includes a plurality of electrical elements 33, at least a portion of which are arranged in a first region 201, and at least another portion of which are arranged in a second region 202. The first region 201 and the second region 202 have a second spacing space 40 in a second direction, which is perpendicular to the first direction. The projection of the second spacing space 40 onto a projection plane perpendicular to the first direction is along the first direction, and the projection of the second spacing space 40 covers the projection of at least a portion of the protrusion 221.

[0148] As a result, the protrusion 221 can reasonably utilize part of the area within the second accommodating space 20 without affecting the arrangement of electrical components 33, making the overall layout of the battery device 100 more compact and regular, which is conducive to improving the space utilization of the battery device 100 and to miniaturizing the battery device 100.

[0149] The plurality of electrical components 33 may be divided into at least two parts. For example, one part of the electrical components 33 may be located on the protrusion 221 inside the second receiving space 20, and the other part of the electrical components 33 may be located outside the protrusion 221 inside the second receiving space 20.

[0150] As another example, the two electrical components 33 may be located on opposite sides of the protrusion 221 along the second direction, such that the protrusion 221 is located in the second gap space 40 between the two electrical components 33.

[0151] As another example, the two electrical components 33 may be arranged at intervals along the second direction on the protrusion 221.

[0152] Those skilled in the art will understand that each part of the electrical component 33 typically includes a plurality of electrical components 33, at least two of which have a first spacing space 30 in the second direction.

[0153] In some embodiments of this disclosure, the battery device 100 shown in FIG5 and FIG7 further includes an electrical connector 5 for connecting electrical components 33 located in the first region 201 and the second region 202 respectively, and at least a portion of the electrical connector 5 is located within the second space 40.

[0154] Electrical connector 5 is a component that enables electrical connection of electrical components 33, and is typically made of conductive material. Exemplarily, electrical connectors include, but are not limited to, copper busbars, wires, etc.

[0155] The electrical connector 5 of this embodiment can be located at least partially within the second space 40, thereby enabling the electrical connector 5, which is used to connect the electrical components 33 in the two regions, to make full use of at least a portion of the second space 40. This makes the overall layout of the electrical components 33 and the electrical connector 5 more reasonable, thereby reducing space waste. The electrical connector 5 does not need to occupy the remaining space in the second accommodating space 20, thus improving the space utilization rate in the second accommodating space 20. This allows for a suitable reduction in the size of the second accommodating space 20, which is beneficial for the miniaturization of the battery device 100.

[0156] In some embodiments, a groove-like limiting portion can be formed in the second space 40, so that the electrical connector 5 can be at least partially located in the limiting portion, which plays a certain limiting role for the electrical connector 5, further reducing the possibility of poor contact or safety hazards between electrical components 33 due to the movement of the electrical connector 5, and improving the electrical reliability in the second accommodating space 20.

[0157] Furthermore, limiting the electrical connector 5 can reduce the area occupied by the electrical connector 5 in the second accommodating space 20, further improving the regularity of the second accommodating space 20, which is conducive to reducing the size of the second accommodating space 20, thereby helping to reduce the overall size of the battery device 100.

[0158] In some embodiments of this disclosure, as shown in Figures 5 and 8, the battery device 100 further includes a carrier 6 for carrying an electrical component 33 located in a first region 201. The carrier 6 protrudes toward a direction away from the first receiving space 10 to form a receiving portion 61 on a surface toward the first receiving space 10, and at least a portion of the protrusion 221 is located within the receiving portion 61.

[0159] The support member 6 is generally plate-shaped and is used to support at least part of the electrical components 33. Integrating the electrical components 33 in the first region 201 onto the support member 6 can improve the integration level of the electrical components 33, thereby saving the space occupied by the electrical components 33.

[0160] Of course, those skilled in the art will understand that electrical component 33 does not necessarily have to be integrated on the carrier 6. In some embodiments, the battery device 100 may not include the carrier 6, and electrical component 33 may be directly disposed on the cover plate 22.

[0161] Furthermore, the carrier 6 has a receiving portion 61, the shape of which is generally adapted to the shape of the protrusion 221. Through the cooperation between the protrusion 221 and the receiving portion 61, the carrier 6 can be fitted on top of the protrusion 221, thereby reducing the gap between the protrusion 221 and the carrier 6. This prevents the carrier 6 from occupying too much space in the height direction (first direction), which helps to save the size of the second receiving space 20 along the first direction and is more conducive to the miniaturization and integration of the battery device 100.

[0162] In some embodiments of this disclosure, as shown in FIG8, the battery device 100 further includes a carrier 6 for carrying at least a portion of the electrical component 3. The carrier 6 protrudes toward a direction away from the first receiving space 10 to form a receiving portion 61 on a surface toward the first receiving space 10, at least a portion of the protrusion 221 being located within the receiving portion 61.

[0163] This allows at least some electrical components 3 to be integrated onto the carrier 6, thereby increasing the integration level of the electrical components 3 and making it more advantageous to save the space occupied by the electrical components 3.

[0164] Furthermore, the carrier 6 has a receiving portion 61. By cooperating with the receiving portion 61, the distance between the protrusion 221 and the carrier 6 is reduced, so that the carrier 6 will not occupy too much space in the height direction (first direction). This is beneficial to saving the size of the second receiving space 20 along the first direction, and is more conducive to the miniaturization and integration of the battery device 100.

[0165] Those skilled in the art should understand that the carrier 6 may be used to support electrical components 3 in a manner where at least all electrical components 3 are integrated on the carrier 6, or only a portion of electrical components 3 may be integrated on the carrier 6, while the other portion of electrical components 3 may be directly disposed on the cover plate 22.

[0166] In some embodiments of this disclosure, as shown in Figures 4 to 7, the first plate 4 includes a plurality of sidewall portions 41 connected to the cover plate 22. A third gap space 50 is provided between the electrical component 3 and at least one of the plurality of sidewall portions 41. The projection of the third gap space 50 onto a projection plane perpendicular to the first direction covers at least a portion of the projection of the protrusion 221.

[0167] The sidewall portion 41 refers to the wall surface of the first plate 4 extending along the first direction. In this embodiment of the present disclosure, the first plate 4 includes four sidewall portions 41. In some other embodiments, the first plate 4 may also include more or fewer sidewall portions 41, which can be specifically set according to the shape of the area to be covered.

[0168] Furthermore, when the projection is projected onto a projection plane perpendicular to the first direction, the projection of the third interval space 50 covers at least part of the projection of the protrusion 221, indicating that at least part of the first plate 4 is covered on the protrusion 221. This allows the protrusion 221 to partially extend into the area within the second receiving space 20 formed by the first plate 4 and the cover plate 22, improving space utilization and helping to reduce the overall size of the battery device 100 along the first direction.

[0169] In some embodiments of this disclosure, as shown in Figures 4 and 6, at least a portion of the projection of the protrusion 221 is located outside the projection of the first plate 4, projected onto a projection plane perpendicular to the first direction.

[0170] Therefore, the protrusion 221 can partially utilize the area of ​​the second receiving space 20 formed between the first plate 4 and the cover plate 22. While not affecting the function of each electrical component 3, it saves a certain amount of redundant space, which is conducive to improving the overall space utilization of the battery device 100, and is more conducive to the miniaturization and integration of the battery device 100. Alternatively, without changing the overall volume of the battery device 100, it can reserve more area for the first receiving space 10, thereby improving the energy density of the battery device 100.

[0171] In some embodiments of this disclosure, as shown in Figures 4 to 7, the first plate 4 is provided with a relief groove 42, and at least a portion of the protrusion 221 passes through the relief groove 42.

[0172] Because the protrusion 221 has a certain height along the first direction, when the first plate 4 is placed on the cover plate 22 where the protrusion 221 is formed, the overall height will be raised. That is, the lower edge of the first plate 4 cannot contact the cover plate 22, which is not conducive to the placement stability of the first plate 4. Moreover, a certain gap will be formed below the first plate 4, and external dust, foreign objects, etc. may enter the interior of the second receiving space 20 through the gap, thereby causing some adverse effects on the internal electrical components 3.

[0173] Therefore, in this embodiment, the first plate 4 is also provided with a relief groove 42. The shape and size of the relief groove 42 are generally adapted to the shape and size of the protrusion 221 to be contacted, so that the relief groove 42 on the lower edge of the first plate 4 cooperates with the protrusion 221. Except for the relief groove 42, the remaining lower edge part directly contacts the cover plate 22, so that the first plate 4 can be reasonably and fully disposed above the cover plate 22 with the protrusion 221, and the second accommodating space 20 can be relatively sealed, so that external dust, foreign objects and the like are not easy to enter the interior of the second accommodating space 20, which plays a good protective role for the electrical components 3 in the second accommodating space 20.

[0174] For example, a clearance groove 42 can be formed by protruding the lower edge of the first plate 4 toward the second receiving space 20. The embodiments of this disclosure do not specifically limit the shape and size of the clearance groove 42, but can specifically limit it according to the shape and size of the protrusion 221 that needs to be cleared.

[0175] In some embodiments, a sealing element may be provided at the lower edge of the first plate 4 and in the relief groove 42, so that the first plate 4 and the cover plate 22 form a relatively sealed second receiving space 20, which provides better protection for the electrical components 3 contained inside.

[0176] In some embodiments of this disclosure, as shown in Figures 8 and 9, the groove 222 forms an installation space 2221, and the opening of the groove 222 faces the first receiving space 10 so that the first receiving space 10 communicates with the installation space 2221. The battery device 100 includes a first component 7 located within the installation space 2221, at least a portion of the first component 7 being located within the groove 222.

[0177] Therefore, at least some structural components, busbars, etc. used to connect each battery cell 11 in the battery cell assembly 1 can be accommodated in the mounting space 2221 of the groove 222, which helps to reduce the occupation of these structural components, busbars, etc. in the first accommodating space 10, improve the regularity of the first accommodating space 10, and further improve the energy density of the battery device 100 without changing the volume of the first accommodating space 10.

[0178] In some embodiments of this disclosure, the battery device 100 includes a busbar 8 and a sampling component 9. The battery cell assembly 1 is provided with an electrode lead-out portion 12. The busbar is connected to the electrode lead-out portion 12. The sampling component is used to connect to the battery cell assembly 1 to obtain information of the battery cell assembly 1. The first component includes at least one of the electrode lead-out portion 12, the busbar 8, and the sampling component 9.

[0179] The busbar 8 is used to electrically connect multiple battery cells 11 in the battery cell assembly 1, or to electrically connect multiple battery cell assemblies 1, thereby realizing series, parallel or mixed connection between battery cells 11 or between battery cell assemblies 1.

[0180] The sampling component 9 is electrically connected to the battery cell assembly 1 to sample the battery cell assembly 1, for example, to obtain information such as the current, voltage, and temperature of the battery cell assembly 1. The sampling component 9 includes, but is not limited to, a flexible circuit board.

[0181] The battery cell assembly 1 is provided with an electrode lead-out portion 12 for outputting current from inside the battery cell assembly 1 or inputting current into the battery cell assembly 1. The electrode lead-out portion 12 can be, for example, a terminal post.

[0182] The electrode lead-out portion 12 is typically provided protruding from the surface of the battery cell assembly 1, and the busbar and sampling component are typically electrically connected to the electrode lead-out portion 12 of the battery cell assembly 1. Therefore, these components also occupy a certain space in the first receiving space 10, thereby increasing the size of the housing 21 along the first direction.

[0183] In this embodiment, since a protrusion 221 is formed on the cover plate 22, and the protrusion 221 is recessed towards the surface of the first receiving space 10 to form a groove 222, the above-mentioned components can be at least partially accommodated in the mounting space 2221 of the groove 222. This reduces the space occupied by one or more of the electrode lead-out portion 12, the busbar, and the sampling component for placing the battery cell assembly 1, which is beneficial to make the space for placing the battery cell assembly 1 in the housing 21 more regular and the structure of the battery device 100 more compact.

[0184] In some embodiments of this disclosure, as shown in Figures 10 and 11, the first component 7 includes an electrode lead-out portion 12, at least a portion of which is located within a groove 222.

[0185] The electrode lead-out portion 12 is at least partially located within the groove 222, thereby allowing the main body portion of the battery cell assembly 1, excluding the electrode lead-out portion 12, to be positioned closer to the inner wall of the cover plate 22. This improves the space utilization of the first accommodating space 10, and allows for an appropriate increase in the volume of the main body portion of the battery cell assembly 1 without changing the volume of the first accommodating space 10, which is beneficial for improving the energy density of the battery device 100.

[0186] In some embodiments of this disclosure, as shown in Figures 8, 9, and 10, the battery cell assembly 1 includes a first battery cell assembly 1a, the first battery cell assembly 1a includes a first electrode lead-out portion 121 and a second electrode lead-out portion 122, and the groove 222 includes a first groove 222a, with at least a portion of both the first electrode lead-out portion 121 and the second electrode lead-out portion 122 located in the first groove 222a.

[0187] Those skilled in the art will understand that there can be multiple first battery cell components 1a, and there can also be multiple first grooves 222a. The positions of the first grooves 222a can correspond to the positions of the first battery cell components 1a, and each first battery cell component 1a can be located in a separate first groove 222a. This disclosure does not specifically limit the number of first battery cell components 1a and the number of first grooves 222a.

[0188] The first battery cell assembly 1a may include multiple first electrode leads 121 and second electrode leads 122, and each battery cell 11 in the first battery cell assembly 1a includes an electrode lead 12.

[0189] Since the first electrode lead-out portion 121 and the second electrode lead-out portion 122 of the same first battery cell assembly 1a are at least partially located in the same first groove 222a, the space utilization rate of the first groove 222a can be improved, the overall number of grooves 222 can be reduced, and the processing difficulty of the cover plate 22 can be reduced, thereby reducing production costs. Moreover, it is beneficial to arrange the sampling component 9, making it easier for the sampling component 9 to simultaneously collect information from the first electrode lead-out portion 121 and the second electrode lead-out portion 122.

[0190] In some embodiments of this disclosure, as shown in FIG10, the length of the first groove 222a is greater than the width of the groove, and the distance between the farthest points of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 along the width direction of the first groove 222a is less than half of the maximum dimension of the first battery cell assembly 1 along the width direction of the first groove 222a.

[0191] The distance between the farthest points of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 along the groove width direction of the first groove 222a refers to the distance between the two farthest points between the outer contours of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 projected onto a projection plane perpendicular to the first direction.

[0192] The first direction, the width direction of the first groove 222a, and the length direction of the first groove 222a are perpendicular to each other.

[0193] This makes the arrangement of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 on the first battery cell assembly 1 more compact, which is conducive to reducing the size of the protrusion 221 and the overall outer contour size of the battery cell assembly 1, and is conducive to the miniaturization and integration of the battery device 100.

[0194] Furthermore, the centralized arrangement of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 allows for a larger flat space to be reserved in the remaining positions of the battery cell assembly 1, except for the electrode lead-out portion 12, which facilitates the arrangement of other components of the battery cell assembly 1 and improves the compactness of the battery device 100.

[0195] In some embodiments of this disclosure, as shown in FIG11, the sampling component 9 includes a first sampling component 91, which is electrically connected to the first battery cell assembly 1a, and at least a portion of the first sampling component 91 is located in the first groove 222a.

[0196] Therefore, the sampling component 9 can occupy the space within the first accommodating space 10, and simultaneously sample the first electrode lead-out portion 121 and the second electrode lead-out portion 122 located in the first groove 222a through the first sampling component 91, which makes it easier for the first sampling component 91 to sample, without having to sample the first electrode lead-out portion 121 and the second electrode lead-out portion 122 separately, which is beneficial for the number of sampling components 9.

[0197] Those skilled in the art should understand that when there are multiple first grooves 222a, there can also be multiple first sampling components 91. Each first groove 222a can be provided with a first sampling component 91 to sample the first electrode lead-out portion 121 and the second electrode lead-out portion 122 in each first groove 222a.

[0198] Of course, in some other embodiments, multiple first sampling components 91 may be provided in a first groove 222a. This disclosure does not specifically limit the number of first sampling components 91, as long as they can sample the first battery cell assembly 1a.

[0199] In some embodiments of this disclosure, the length of the first groove 222a is greater than its width, and the projection plane perpendicular to the length of the first groove 222a is projected along the length of the first groove 222a. The first electrode lead-out portion 121 and the second electrode lead-out portion 122 have at least partial projection overlap.

[0200] In other words, the first electrode lead-out portion 121 and the second electrode lead-out portion 122 are roughly on the same horizontal line along the length direction of the first groove 222a, thereby reducing the distance between the outer edges of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 and the edge of the first groove 222a along the width direction. This helps to reduce the size of the first groove 222a along the width direction and the size of the battery cell assembly 1 along the width direction, thereby improving the compactness of the battery device 100.

[0201] In some embodiments of this disclosure, as shown in FIG10, the length of the first groove 222a is greater than the width of the groove, and the first battery cell assembly 1a includes a first edge 10a and a second edge 20a disposed opposite to each other along the width direction of the first groove 222a. The maximum distance between the first electrode lead-out portion 121 and the first edge 10a is less than the maximum distance between the first electrode lead-out portion 122 and the second edge 10a is less than the maximum distance between the second electrode lead-out portion 122 and the second edge 20a.

[0202] In other words, in this embodiment of the present disclosure, the first electrode lead-out portion 121 and the second electrode lead-out portion 122 are both located close to the first edge 10a of the first battery cell assembly 1a. With the overall size of the battery cell assembly 1 remaining unchanged, a larger flat space can be formed on the side of the battery cell assembly 1 near the second edge, thereby reserving more space for arranging the sampling component 9, the busbar 8, etc., and improving the arrangement flexibility.

[0203] In some embodiments of this disclosure, as shown in Figures 10 and 11, the first battery cell assembly 1a includes a first edge 10a and a second edge 20a disposed opposite to each other along the groove width direction of the first groove 222a. The sampling assembly 9 includes a first sampling assembly 91, which is electrically connected to the first battery cell assembly 1a. The first sampling assembly 91 is located between the first electrode lead-out portion 121 and the second electrode lead-out portion 122, which is closer to the second edge 20a, and the second edge 20a.

[0204] Therefore, the first electrode lead-out portion 121 and the second electrode lead-out portion 122 of the first battery cell assembly 1a can be sampled simultaneously by the first sampling component 91, and the first sampling component 91 can be located in a large flat space near the second edge 20a of the first battery cell assembly 1a, making full use of the flat area and improving the space utilization of the battery device 100.

[0205] In some embodiments of this disclosure, as shown in FIG11, the battery device 100 further includes a first busbar 81 for electrically connecting the first electrode lead-out portion 121 to the electrode lead-out portions 12 on other battery cell assemblies 1, and at least a portion of the first busbar 81 is located in a first groove 222a.

[0206] This ensures that the first busbar 81 does not occupy too much space within the battery cell assembly 1, further improving the regularity within the first housing space 10. Without changing the volume of the first housing space 10, this helps to increase the energy density of the battery device 100.

[0207] A second aspect of this disclosure provides an electrical device comprising a battery device 100 as claimed in any one of claims 1-21, the battery device 100 being used to provide electrical energy to the electrical device.

[0208] Because the electrical device uses the battery device 100 with a compact structure and high space utilization as described above, the battery device 100 occupies less space in the electrical device without affecting the energy density of the battery device 100. This is beneficial for the arrangement of other components in the electrical device and improves the space utilization of the electrical device.

[0209] In some embodiments of this disclosure, as shown in FIG3, the electrical device is a vehicle 1000, and the vehicle 1000 also includes a seat 1001, with at least a portion of the second accommodating space 20 located below the seat 1001.

[0210] Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. As shown in Figure 1, a battery device 100 is installed inside vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, it can serve as the operating power source for vehicle 1000. Vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of vehicle 1000 during starting, navigation, and driving.

[0211] In some embodiments of this disclosure, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0212] In this embodiment of the disclosure, the electrical component 3 is integrated into the second accommodating space 20, which can save the space occupied by the electrical component 3, so that the second accommodating space 20 accommodating the electrical component 3 can be located at least partially under the seat 1001 of the vehicle 1000, making full use of the space under the seat 1001 and improving space utilization.

[0213] The following describes specific examples of some embodiments of this disclosure with reference to the accompanying drawings.

[0214] As a specific example, this disclosure provides a battery pack (battery device 100) structure with a bulge (protrusion 221). The bulge structure includes, but is not limited to, a lateral or longitudinal distribution. The bulge structure of the battery pack cover (cover plate 22) accommodates the battery terminals (electrode leads), electrical connections above the terminals (busbars 8), and sampling (sampling components 9), among other structures. A high-voltage box (second accommodating space 20) structure is located on the top layer of the battery pack, near one end. The high-voltage box accommodates the bulge of the terminals and related electrical connections, with a portion of the bulge embedded within it. By optimizing the internal space of the high-voltage box, the impact of the bulge on the battery pack's shape and Z-axis (first direction) dimensions is reduced, thereby improving the battery pack's volume utilization rate.

[0215] The various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions.

[0216] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure. Industrial applicability

[0217] This disclosure provides a battery device and an electrical device, wherein the electrical components in the battery device are placed separately from the battery cells, so that the electrical components do not occupy the space that accommodates the battery cells, but only occupy a small portion of the space above the cover to form a second accommodating space to accommodate the electrical components, which is beneficial to improving the space utilization of the battery device.

Claims

1. A battery device, wherein, The battery device comprises: a battery cell assembly comprising at least one battery cell; a box assembly comprising a box and a cover plate, the box having an opening, the cover plate covering the opening to jointly form a first accommodating space with the box, the battery cell assembly being located in the first accommodating space; an electrical assembly; a first plate member provided on a side of the cover plate away from the first accommodating space, the first plate member covering the cover plate to form a second accommodating space, the electrical assembly being located in the second accommodating space; wherein the cover plate protrudes towards the second accommodating space to form a protruding portion, and a surface of the protruding portion towards the first accommodating space is recessed to form a groove.

2. The battery device of claim 1, wherein, The first plate member covers the cover plate in a first direction, the electrical assembly comprises a first electrical element and a second electrical element, a maximum dimension of the first electrical element in the first direction is smaller than a maximum dimension of the second electrical element in the first direction, projecting the first electrical element and the second electrical element in the first direction on a projection plane perpendicular to the first direction, a projection of the first electrical element at least partially overlaps a projection of the protruding portion, and a projection of the second electrical element is completely misaligned with the projection of the protruding portion.

3. The battery device of claim 2, wherein, The first electrical element is a resistor, and the second electrical element is a fuse or a relay.

4. The battery device of claim 1, wherein, The electrical assembly comprises a plurality of electrical elements, at least two of the plurality of electrical elements have a first spacing space in a second direction, the second direction being perpendicular to the first direction, projecting the first spacing space in the first direction on a projection plane perpendicular to the first direction, a projection of the first spacing space covers at least part of a projection of the protruding portion.

5. The battery device of claim 1, wherein, The electrical assembly comprises a plurality of electrical elements, at least part of the plurality of electrical elements are arranged in a first region, and at least another part of the plurality of electrical elements are arranged in a second region, the first region and the second region have a second spacing space in a second direction, the second direction being perpendicular to the first direction, projecting the second spacing space in the first direction on a projection plane perpendicular to the first direction, a projection of the second spacing space covers at least part of a projection of the protruding portion.

6. The battery device of claim 5, wherein, The battery device further comprises an electrical connector for connecting electrical elements respectively located in the first region and the second region, at least part of the electrical connector is located in the second spacing space.

7. The battery device of claim 5, wherein, The battery device further comprises a carrier for carrying the electrical elements located in the first region, the carrier protrudes in a direction away from the first accommodating space to form a receiving portion on a surface facing the first accommodating space, at least part of the protruding portion is located in the receiving portion.

8. The battery device of claim 1, wherein, The battery device further comprises a carrier for carrying at least part of the electrical assembly, the carrier protrudes in a direction away from the first accommodating space to form a receiving portion on a surface facing the first accommodating space, at least part of the protruding portion is located in the receiving portion.

9. The battery device of claim 1, wherein, The first plate member includes a plurality of side wall portions connected to the cover plate, a third spacing space is provided between the electrical component and at least one of the plurality of side wall portions, and a projection of the third spacing space on a projection plane perpendicular to the first direction in the first direction covers at least part of a projection of the protruding portion.

10. The battery device of claim 1, wherein, At least part of a projection of the protruding portion is located outside a projection of the first plate member in the first direction.

11. The battery device of claim 10, wherein, The first plate member is provided with a relief groove, and at least part of the protruding portion passes through the relief groove.

12. The battery device of any one of claims 1-11, wherein, The recess is formed with a mounting space, and an opening of the recess faces the first accommodation space to communicate the first accommodation space with the mounting space. The battery device includes a first component located in the mounting space, and at least part of the first component is located in the recess.

13. The battery device of claim 12, wherein, The battery device includes a busbar and a sampling component, the battery monomer assembly is provided with an electrode lead-out portion, the busbar is connected to the electrode lead-out portion, and the sampling component is used to connect the battery monomer assembly to obtain information of the battery monomer assembly. The first component includes at least one of the electrode lead-out portion, the busbar and the sampling component.

14. The battery device of claim 13, wherein, The first component includes the electrode lead-out portion, and at least part of the electrode lead-out portion is located in the recess.

15. The battery device of claim 14, wherein, The battery monomer assembly includes a first battery monomer assembly, the first battery monomer assembly includes a first electrode lead-out portion and a second electrode lead-out portion, the recess includes a first recess, and at least part of the first electrode lead-out portion and the second electrode lead-out portion is located in the first recess.

16. The battery device of claim 15, wherein, The first recess has a length greater than a width, and a distance between the most distant points of the first electrode lead-out portion and the second electrode lead-out portion in the width direction of the first recess is less than half of the maximum dimension of the first battery monomer assembly in the width direction of the first recess.

17. The battery device of claim 15, wherein, The sampling component includes a first sampling component, the first sampling component is electrically connected to the first battery monomer assembly, and at least part of the first sampling component is located in the first recess.

18. The battery device of claim 15, wherein, The first recess has a length greater than a width, and a projection of the first electrode lead-out portion and the second electrode lead-out portion at least partially overlaps in the length direction of the first recess.

19. The battery device of claim 15, wherein, The first recess has a length greater than a width, the first battery monomer assembly includes a first edge and a second edge oppositely arranged in the width direction of the first recess, a maximum distance between the first electrode lead-out portion and the first edge is less than a maximum distance between the first electrode lead-out portion and the second edge, and a maximum distance between the second electrode lead-out portion and the first edge is less than a maximum distance between the second electrode lead-out portion and the second edge.

20. The battery device of claim 15, wherein, The first battery monomer assembly includes a first edge and a second edge oppositely arranged in the width direction of the first recess, the sampling component includes a first sampling component, the first sampling component is electrically connected to the first battery monomer assembly, and the first sampling component is located between the second edge and one of the first electrode lead-out portion and the second electrode lead-out portion closer to the second edge.

21. The battery device of claim 15, wherein, The battery device further includes a first busbar for electrically connecting the first electrode lead-out portion and electrode lead-out portions on other battery cell assemblies, at least a portion of the first busbar being positioned in the first recess.

22. An electrical device, comprising: The electric device includes the battery device as claimed in any one of claims 1 to 21, the battery device being configured to supply electric power to the electric device.

23. The powered device of claim 22, wherein, The electric device is a vehicle, the vehicle further including a seat, at least a portion of the second accommodation space being positioned below the seat.

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