Battery device and electric device

Abstract

The battery device comprises a box body, a sampling assembly and a plurality of battery monomer assemblies, the box body comprises a plurality of box walls, the plurality of box walls jointly define an installation space, the plurality of box walls comprise a first box wall, the first box wall is provided with a protruding part protruding in the direction away from the installation space, and the first box wall is provided with a second box wall. A groove is formed in the protruding part, and an opening of the groove faces the installation space so that the space in the groove can be communicated with the installation space. The plurality of battery monomer assemblies are arranged in the mounting space; the sampling assembly is used for obtaining information of the battery monomer assembly, and at least part of the sampling assembly is located in the groove. According to the battery device disclosed by the embodiment of the utility model, the groove is formed in the box wall and is used for accommodating at least part of the sampling component, so that the waste of space in the box body for arranging the sampling component is reduced, and the structure of the battery device is more compact.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of battery devices, and in particular to a battery device and an electrical device. Background Art

[0002] With the development of technology, the application scenarios of new energy battery devices in life and industrial production are becoming more and more extensive.

[0003] The battery device is composed of multiple battery cells connected in series and parallel to increase the capacity of the battery device and the charge and discharge current, thereby expanding the scope of use of the battery device.

[0004] The battery device is generally also provided with a sampling component for electrically connecting to the battery cell components in the battery device to obtain information about the battery cell components, thereby assisting in achieving charge and discharge control of the battery cell components and ensuring their safe use.

[0005] The sampling assembly is arranged in the housing of the battery device and needs to occupy a portion of the volume of the housing together with the battery cell assembly, thus easily increasing the overall size of the housing and being detrimental to the fitment of the battery device. Utility Model Content

[0006] In view of this, embodiments of the present invention aim to provide a battery device and an electrical device that can make the arrangement of the sampling assembly more compact.

[0007] To achieve the above-mentioned purpose, the technical solution of the embodiment of the utility model is implemented as follows:

[0008] The present invention provides a battery device, comprising:

[0009] The box body includes a plurality of box walls, which are collectively arranged to form an installation space. The plurality of box walls include a first box wall, the first box wall having a protrusion protruding in a direction away from the installation space, a groove being provided in the protrusion, and an opening of the groove facing the installation space so that the space in the groove communicates with the installation space.

[0010] A plurality of battery cell assemblies are arranged in the installation space;

[0011] The sampling component is used to obtain information about the battery cell component, and at least a portion of the sampling component is located in the groove.

[0012] The battery device in the embodiment of the present invention forms a protrusion on the first box wall and provides a groove inside the protrusion. The groove is used to accommodate at least part of the sampling assembly, thereby helping to reduce the waste of space inside the box caused by the presence of a large amount of idle space next to the sampling assembly. Since the sampling assembly is usually arranged on the outer surface of the battery cell assembly, the sampling assembly usually protrudes from the surface of the battery cell assembly. Using the protrusion to form a groove to place at least part of the sampling assembly also helps to make the space inside the box for placing the battery cell assembly more regular, which helps to make the structure of the battery device more compact. In addition, the sampling assembly is at least partially located in the groove formed by the protrusion, and the protrusion can also provide a certain degree of protection for the sampling assembly. In addition, providing the protrusion on the first box wall also helps to suppress the probability of deformation such as bending and twisting of the first box wall, thereby improving the overall structural strength of the box. The protrusion can also be used to strengthen the protection of the sampling assembly.

[0013] In some embodiments, the battery cell assembly includes a first wall and an electrode lead portion disposed on the first wall, and the sampling assembly is located on the first wall.

[0014] The sampling component and the electrode lead-out portion are at least partially located in the groove.

[0015] Thus, when the first box wall has a protrusion and a groove is formed within the protrusion, the sampling assembly and the electrode lead portion can be at least partially disposed within the groove. The battery cell assembly, excluding the electrode lead portion, can be more conveniently grouped within the installation space, reducing the amount of unused space within the box caused by the placement of the electrode lead portion and the sampling assembly, thereby improving the utilization of the installation space. Furthermore, since both the electrode lead portion and the sampling assembly are at least partially located within the groove, the protrusion can provide a certain degree of protection for the sampling assembly and the electrode lead portion.

[0016] In some embodiments, the sampling assembly and the electrode lead are at least partially located within the same recess. This improves space utilization within a single recess, reduces the number of recesses, and allows for closer proximity between the sampling assembly and the electrode lead, facilitating the use of the sampling assembly to collect information from the electrode lead. Furthermore, the connection length of the sampling assembly can be shortened, saving material.

[0017] In some embodiments, the battery device further includes a busbar, which is used to connect the electrode leads of different battery cell assemblies. The busbar, sampling assembly, and electrode leads are all at least partially located within the same recess. This helps improve space utilization within a single recess and reduces the number of recesses. It also facilitates the connection between the busbar and the electrode leads, or facilitates a closer distance between the sampling assembly and the busbar or the electrode leads, facilitating the use of the sampling assembly to collect information from the busbar or the electrode leads. Furthermore, the connection length of the sampling assembly can be shortened, saving material.

[0018] In some embodiments, the battery cell assembly includes a first battery cell assembly, the first battery cell assembly includes a first electrode lead portion and a second electrode lead portion, the sampling assembly includes a first sampling assembly, the first sampling assembly is electrically connected to the first battery cell assembly, the recess includes a first recess, and the first electrode lead portion, the second electrode lead portion, and the first sampling assembly are at least partially located within the first recess. This improves space utilization within the first recess and facilitates centralized arrangement of the electrode lead portions on the first battery cell assembly, allowing for unified sampling by the same sampling assembly.

[0019] In some embodiments, the first groove has a groove length greater than the groove width, and the distance between the farthest points of the first electrode lead portion and the second electrode lead portion along the groove width of the first groove is less than half the maximum dimension of the first battery cell assembly along the groove width of the first groove. This facilitates more concentrated arrangement of the first and second electrode lead portions on the first wall surface, reduces the size of the protrusion, and thus reduces the outer dimensions of the battery device. It also facilitates forming a larger regular area on the rest of the first wall surface to facilitate the arrangement of other components in the battery device, thereby improving the compactness of the battery device structure.

[0020] In some embodiments, the first groove has a groove length greater than the groove width, and in a projection plane perpendicular to the groove length of the first groove, the projection of the first electrode lead portion and the projection of the second electrode lead portion at least partially overlap. This helps reduce the distance between the farthest points of the first electrode lead portion and the second electrode lead portion along the groove width of the first groove, thereby reducing the size of the protrusion along the groove width, reducing the outer dimensions of the battery device, and improving the adaptability of the battery device. It also facilitates more centralized arrangement of the first electrode lead portion and the second electrode lead portion, allowing them to share the space within the first groove.

[0021] In some embodiments, the first groove has a groove length greater than the groove width, the first battery cell assembly includes a first edge and a second edge disposed opposite each other along the groove width of the first groove, the maximum distance between the first electrode lead portion and the first edge is less than the maximum distance between the first electrode lead portion and the second edge, and the maximum distance between the second electrode lead portion and the first edge is less than the maximum distance between the second electrode lead portion and the second edge. In this manner, the first and second electrode lead portions can be more concentrated in an area near the first edge, and the first and second electrode lead portions can simultaneously extend into the first groove. This results in a more regular surface on the first battery cell assembly near the second edge, allowing for closer contact with areas of the first box wall where no protrusions are provided, thereby reducing space waste within the box. Alternatively, the space on one side of the first and second electrode lead portions facing the second edge can be used to house other components, such as the sampling assembly, and the sampling assembly can at least partially extend into the first groove, thereby utilizing a portion of the space within the first groove.

[0022] In some embodiments, the first sampling assembly is located on the same side of the first electrode lead-out portion and the second electrode lead-out portion along the groove width direction of the first groove. In this way, the first sampling assembly does not need to be installed between the first electrode lead-out portion and the second electrode lead-out portion, making installation more convenient. In addition, since the busbar needs to be connected to the first electrode lead-out portion and the second electrode lead-out portion, installing the first sampling assembly on one side of the first electrode lead-out portion and the second electrode lead-out portion can reduce the probability of interference between the busbar and the first sampling assembly. Since the first sampling assembly is located on one side of the first electrode lead-out portion and the second electrode lead-out portion, the first electrode lead-out portion and the second electrode lead-out portion, which are closer in size, can be arranged more centrally. The arrangement of the first sampling assembly can more effectively utilize the more regular area next to the first electrode lead-out portion and the second electrode lead-out portion for arrangement, and more rationally utilize the internal space of the battery device.

[0023] In some embodiments, the first sampling assembly includes a main body and a terminal portion. The main body is attached to the first wall and offset from the electrode lead portion. The terminal portion is connected to the main body and the battery cell assembly. This offset prevents direct contact between the main body and the electrode lead portion, reducing the adverse impact of the electrode lead portion on the accuracy of the sampling information collected by the sampling assembly. Furthermore, the large size of the main body facilitates its placement within the regular area formed on the first wall, reducing the likelihood of interference between the main body and other components.

[0024] In some embodiments, the battery device further includes a current collector, wherein the terminal portion is at least partially bent to connect to at least one of the electrode lead portion and the current collector. If the electrode lead portion and the main body portion have different dimensions along a direction perpendicular to the first box wall, the two can be connected by bending the terminal portion, thereby facilitating the placement of the first electrode lead portion, the second electrode lead portion, and the first sampling assembly within the first recess. Furthermore, when the battery cell assembly expands or shifts, the deformation of the bent portion of the terminal portion can reduce the tension between the terminal portion and the main body portion, thereby reducing the probability of damage to the first sampling assembly under the action of tension and extending the service life of the first sampling assembly.

[0025] In some embodiments, the first sampling assembly is located on one side of the first and second electrode lead portions along the width of the first groove. The space within the first groove includes a first accommodating space and a second accommodating space. The maximum dimension of the first accommodating space along the depth of the first groove is smaller than the maximum dimension of the second accommodating space along the depth of the first groove. The first accommodating space is used to accommodate at least a portion of the sampling assembly, and the second accommodating space is used to accommodate at least a portion of the first and second electrode lead portions. This helps reduce space waste within the first groove, reduces the total volume of the first groove, and further reduces the outer dimensions of the protrusion.

[0026] In some embodiments, the first sampling assembly is located on the side of the first and second electrode lead-out portions that faces the bottom wall of the first groove. This simplifies the shape of the interior of the first groove, facilitates machining and manufacturing of the first groove, and also facilitates the first sampling assembly being closer to the first and second electrode lead-out portions.

[0027] In some embodiments, the battery cell assembly includes a first electrode lead-out portion, the sampling assembly includes a first sampling assembly, the first sampling assembly is connected to the first electrode lead-out portion, the protrusion includes a first protrusion and a second protrusion, the first protrusion and the second protrusion are spaced apart on the first box wall, a first recess is formed within the first protrusion, and a second recess is formed within the second protrusion, the first recess is used to accommodate at least a portion of the first sampling assembly, and the second recess is used to accommodate at least a portion of the first electrode lead-out portion. In this way, when the sampling assembly is located far away from the electrode lead-out portion, the total volume of the protrusions is reduced, thereby improving the space utilization within the protrusions.

[0028] In some embodiments, the battery cell assembly includes a first wall and a second wall. The sampling assembly is located on the first wall, the second wall is provided with an electrode lead, and the first wall faces the first chamber wall. This allows only the sampling assembly to fit within the recess dimensions, increasing layout flexibility and reducing recess design and manufacturing complexity.

[0029] In some embodiments, the protrusion includes a third protrusion located on the first box wall, the third protrusion is provided with a second groove opening toward the installation space, and at least a portion of the sampling assembly is located in the second groove;

[0030] The plurality of walls further include a second wall, and the protrusion further includes a fourth protrusion located on the second wall. The fourth protrusion is provided with a third groove opening toward the installation space, and at least a portion of the electrode lead is located in the third groove. This allows grooves located on different walls to accommodate sampling assemblies and electrode lead portions located on different walls, thereby increasing layout flexibility and further contributing to a more compact structure of the battery device.

[0031] In some embodiments, the third protrusion is located at one end of the first wall near the second wall, and the fourth protrusion is located at one end of the second wall near the first wall. This helps shorten the distance between the third and fourth protrusions, thereby facilitating the sampling assembly to be closer to the electrode lead-out portion for electrical connection thereto, reducing the size of the sampling assembly, and further reducing the size of the third protrusion.

[0032] In some embodiments, the battery cell assembly is a single battery cell, which helps to simplify the internal structure of the battery device, reduce the number of components in the battery device, and improve the energy density of the battery device; or, the battery cell assembly includes a shell and multiple battery cells accommodated in the shell; in this way, the shell helps to maintain the external contour of the battery cell assembly, especially when the battery cell is a soft-pack battery cell, so that the battery cell assembly can be placed regularly and stably inside the battery device, thereby improving the space utilization within the battery device and enhancing the safety of use; and, multiple battery cells located in the shell of the same battery cell assembly can be connected to the outside using the same set of electrode lead-out parts, which has a simple structure.

[0033] In some embodiments, the first wall includes a main body and a protruding portion. The protruding portion protrudes from the main body away from the installation space, and the maximum protruding dimension of the protruding portion is less than or equal to 10 mm. This reduces the manufacturing difficulty of forming the protruding portion, thereby reducing manufacturing costs. It also reduces the probability of the protruding portion interfering with other objects outside the battery device, thereby improving the adaptability of the battery device.

[0034] An embodiment of the present utility model further provides an electrical device, characterized in that the electrical device comprises the battery device of any one of the aforementioned embodiments, and the battery device is used to provide electrical energy for the electrical device.

[0035] In this way, by improving the compactness of the battery device structure, it is beneficial to improve the compactness of the arrangement of other components in the electrical device and improve space utilization.

[0036] In some embodiments, the power-consuming device is a vehicle, which further includes a frame, and the battery device is mounted on the frame.

[0037] A accommodating chamber is provided in the vehicle frame, and a part of the protruding portion extends into the accommodating chamber.

[0038] In this way, through the cooperation between the accommodating compartment and the protruding portion, a part of the battery device can utilize the space inside the frame, which is beneficial to improving the space utilization rate of the vehicle and increasing the capacity of the battery device in the vehicle.

[0039] In some embodiments, the vehicle frame includes a mounting beam disposed on one side of the battery device along the vehicle height direction. The mounting beam includes a storage compartment, which is open toward the battery device along the vehicle height direction to form an opening. At least a portion of the protrusion extends into the storage compartment through the opening. This improves the utilization of the internal space of the mounting beam, thereby increasing the battery device capacity in the vehicle.

[0040] In some embodiments, the vehicle includes a passenger compartment, and the first box wall forms a passenger compartment floor of the vehicle.

[0041] This helps reduce the number of parts in the vehicle and improves the compactness of the vehicle structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of an embodiment of the present invention in which the electrical device is a vehicle;

[0043] Figure 2 This is an exploded diagram of a battery device in one embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of a battery device in the first embodiment of the present invention;

[0045] Figure 4 for Figure 3 A schematic diagram of the embodiment in another perspective;

[0046] Figure 5 A partial cross-sectional schematic diagram of a battery device in one embodiment of the present invention;

[0047] Figure 6 for Figure 5 A partial enlarged schematic diagram of the embodiment at position B;

[0048] Figure 7 for Figure 3 A partial cross-sectional diagram of the middle AA position;

[0049] Figure 8 This is a schematic diagram of a first box wall in one embodiment of the present invention;

[0050] Figure 9 This is a schematic diagram of the arrangement of a battery cell assembly, a current bus and a sampling assembly in one embodiment of the present invention;

[0051] Figure 10 A schematic diagram of a battery cell assembly according to an embodiment of the present invention;

[0052] Figure 11 This is a partial cross-sectional diagram of the battery device in the second embodiment of the present invention, and the cross-sectional position is Figure 3 The AA positions in the same;

[0053] Figure 12 This is a partial cross-sectional view of the battery device in the third embodiment of the present invention, and the cross-sectional position is Figure 3 The AA positions in the same;

[0054] Figure 13 This is a partial cross-sectional diagram of a battery device according to the fourth embodiment of the present invention. Figure 3 The AA positions in the same;

[0055] Figure 14 This is a partial cross-sectional view of the battery device in the fifth embodiment of the present invention, and the cross-sectional position is Figure 3 The AA positions in the same;

[0056] Figure 15 A schematic diagram of a battery cell assembly according to another embodiment of the present invention;

[0057] Figure 16 A schematic cross-sectional view of a vehicle in one embodiment of the present invention;

[0058] Figure 17 for Figure 16 A partial enlarged schematic diagram of the middle C position;

[0059] Figure 18 It is a cross-sectional schematic diagram of a vehicle in another embodiment of the present invention.

[0060] Description of Reference Numerals

[0061] 100, vehicle; 10, battery device; 11, housing; 11a, installation space; 11b, opening; 110, housing wall; 111, first housing wall; 112, protrusion; 112a, groove; 112b, first groove; 112c, first accommodating space; 112d, second accommodating space; 1121, first protrusion; 1121a, first recess; 1122, second protrusion; 1122a, second recess; 1123, third protrusion; 1123a, second groove; 113, second housing wall; 1131, fourth protrusion; 114, main body; 115, top cover; 116 , bottom plate; 12, battery cell assembly; 12a, first battery cell assembly; 12b, first edge; 12c, second edge; 121, first wall; 122, electrode lead-out portion; 1221, first electrode lead-out portion; 1222, second electrode lead-out portion; 123, second wall; 124, battery cell; 125, outer shell; 13, sampling assembly; 130, first sampling assembly; 131, main body; 132, terminal portion; 14, busbar; 20, frame; 20a, storage compartment; 20c, passenger compartment; 21, mounting beam; 22, passenger compartment floor; 30, controller; 40, motor. DETAILED DESCRIPTION

[0062] It should be noted that, in the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present invention and should not be regarded as an improper limitation on the present invention.

[0063] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0064] In the description of the embodiments of this utility model, the technical terms "first," "second," "third," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of this utility model, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0065] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this disclosure may be combined with other embodiments.

[0066] In the description of the embodiments of the present invention, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exists simultaneously, and B exists alone. In addition, the character " / " in the present invention generally indicates that the related objects are in an "or" relationship.

[0067] In the description of the embodiments of the present invention, for the convenience of explanation, as shown in FIG. Figure 3 As shown by the arrow in , the direction of arrow F1 is the direction of the slot length; Figure 3 、 Figure 4 、 Figure 7 、 Figure 8 、 Figure 9 As shown by the arrow in, the direction of arrow F2 is the groove height direction; Figure 7 、 Figure 16 and Figure 18 As shown by the arrow in the figure, the direction of arrow F3 is the groove depth direction. Figure 16 and Figure 18 As shown by the arrow in , the direction of arrow F3 is the vehicle height direction.

[0068] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0069] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0070] Currently, battery devices are increasingly being used in everyday life and industry. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in a variety of fields such as aerospace. As the application areas of battery devices continue to expand, market demand is also growing.

[0071] The battery cell involved in the embodiments of the present invention may include an electrode assembly and an electrolyte. The electrode assembly may be composed of a positive electrode sheet, a negative electrode sheet, and a separator. Such a battery cell can operate by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet may include a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. The current collectors not coated with the positive electrode active material layer, after being stacked, serve as the positive electrode tab. Taking a lithium-ion battery device as an example, the positive electrode current collector may be made of aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet may include a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer. The current collectors not coated with the negative electrode active material layer, after being stacked, serve as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene). Furthermore, the electrode assembly can be a wound or laminated structure. Furthermore, the battery cells involved in the embodiments of the present invention can also be solid-state battery cells.

[0072] The battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be recharged to activate the active material after the battery cell is discharged and can be used continuously.

[0073] The battery cells mentioned in the embodiments of the present invention can be lithium-ion battery devices, sodium-ion battery devices, sodium-lithium-ion battery devices, lithium metal battery devices, sodium metal battery devices, lithium-sulfur battery devices, magnesium-ion battery devices, nickel-hydrogen battery devices, nickel-cadmium battery devices, lead-acid battery devices, etc., and the embodiments of the present invention are not limited to this.

[0074] The battery cells mentioned in the embodiments of the present invention may be cylindrical battery cells, prismatic battery cells, soft-pack battery cells or other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic battery devices. Polygonal prismatic battery devices are, for example, hexagonal prismatic battery devices, etc. There are no special restrictions in the embodiments of the present invention.

[0075] The emissions from the battery cells mentioned in the present invention include but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gas generated by the reaction, flame, etc.

[0076] The battery apparatus (Battery Apparatus) mentioned in the embodiments of the present invention may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include one or more battery cells. When the battery cell assembly is formed by multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in mixed connection through a busbar component. When the battery cell assembly includes only one battery cell, the corresponding power supply voltage and capacity can be formed in the battery apparatus by connecting multiple battery cell assemblies in series, in parallel, or in mixed connection.

[0077] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is a battery module formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0078] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the housing.

[0079] As an example, the battery cell assembly may be a battery module, which may be accommodated in the box by fixing the battery module in the box.

[0080] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0081] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0082] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0083] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0084] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0085] Figure 2 This is a schematic diagram of a three-dimensional exploded view of the battery device 10 provided in an embodiment of the present invention. Figure 2 As shown, the battery device 10 includes a housing 11 and at least one battery cell assembly 12 .

[0086] The box body 11 includes a top cover 115 and a bottom plate 116 . The top cover 115 covers the bottom plate 116 , so that an installation space for placing the battery cell assembly 12 is formed between the bottom plate 116 and the top cover 115 .

[0087] The technical solutions described in the embodiments of the present invention are applicable to various electrical devices that use battery cells and battery devices 10, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0088] The battery device 10 involved in the embodiment of the present invention refers to a single physical module including one or more battery cell assemblies 12 to provide higher voltage and capacity.

[0089] The power-consuming devices involved in the embodiments of the present invention are powered by the battery device described above, and the power-consuming devices may be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, etc. Among them, the electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and the spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0090] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present invention is taken as an example of a vehicle 100. The following description is made with reference to the accompanying drawings.

[0091] Figure 1 This is a schematic diagram of the structure of a vehicle 100 provided in one embodiment of the present invention. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1As shown, a battery device 10 is installed inside the vehicle 100. The battery device 10 can be installed at the bottom, front, or rear of the vehicle 100. The battery device 10 can be used to power the vehicle 100. For example, the battery device 10 can serve as an operating power source for the vehicle 100. The vehicle 100 can also include a controller 30 and a motor 40. The controller 30 is used to control the battery device 10 to power the motor 40, for example, to meet the power requirements of the vehicle 100 during startup, navigation, and driving.

[0092] In some embodiments of the present invention, the battery device 10 can serve not only as an operating power source for the vehicle 100 , but also as a driving power source for the vehicle 100 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100 .

[0093] Below, the embodiments of the present utility model are described in detail.

[0094] The battery device includes a housing, a sampling assembly, and a battery cell assembly. Both the battery cell assembly and the sampling assembly are placed inside the housing. The sampling assembly is used to directly or indirectly contact the battery cell assembly to obtain battery cell information and transmit this information to the Battery Management System (BMS). The BMS uses this information to determine the operating status of the battery device and regulate the charge and discharge status of the battery cell assembly.

[0095] Because the sampling assembly differs in shape and size from the battery cell assembly, and the space within the enclosure is generally regular, a large gap must be left between the battery cell assembly and the inner wall of the enclosure to accommodate the sampling assembly. However, since the sampling assembly typically does not need to completely fill the space between the battery cell assembly and the inner wall of the enclosure, some space is left unused and wasted. This hinders the expansion of the battery cell assembly, and consequently, hinders further improvement in the capacity of the battery device.

[0096] Based on the above problems, an embodiment of the present utility model aims to provide a battery device, wherein a groove is provided on the box wall of the battery device, the groove is connected to the installation space for accommodating the battery cell assembly, and at least a portion of the sampling assembly is arranged in the groove to reduce the space occupied by the sampling assembly in the installation space, which is conducive to improving the space utilization of the battery device.

[0097] Specifically, see Figures 3 to 7 The battery device 10 includes a housing 11 , a sampling assembly 13 and a plurality of battery cell assemblies 12 .

[0098] The housing 11 includes multiple walls 110, which collectively enclose an installation space 11a. The walls 110 include a first wall 111, which has a protrusion 112 extending away from the installation space 11a. A groove 112a is defined within the protrusion 112, and an opening 11b of the groove 112a faces the installation space 11a, connecting the space within the groove 112a to the installation space 11a. Multiple battery cell assemblies 12 are disposed within the installation space 11a. A sampling assembly 13 is configured to obtain information about the battery cell assemblies 12, with at least a portion of the sampling assembly 13 located within the groove 112a. The housing 11 provides a location and provides protection for components such as the battery cell assemblies 12 and the sampling assembly 13.

[0099] The box wall 110 refers to the corresponding structure forming the outer surface of the box body 11. It is understandable that the top cover 115 and the bottom plate 116 can each form one or more box walls 110.

[0100] The first box wall 111 refers to a box wall 110 provided with the protrusion 112 and the groove 112 a among the multiple box walls 110 . The first box wall 111 may be on the top cover 115 or on the bottom plate 116 .

[0101] A portion of the box wall 110 facing the installation space 11a is recessed away from the installation space 11a to form a groove 112a, and a side surface of the same portion facing away from the installation space 11a is protruded away from the installation space 11a to form a protrusion 112.

[0102] The battery cell assembly 12 may refer to only a single battery cell 124 , or may be a unit formed by electrically connecting a plurality of battery cells 124 in series or in parallel.

[0103] The battery cell 124 is the smallest component in the battery device 10 that can realize charging and discharging functions through electrochemical reactions.

[0104] The sampling assembly 13 is used to contact and electrically connect with the battery cell assembly 12 to obtain information such as the temperature and voltage of the battery cell assembly 12 .

[0105] At least a portion of the sampling component 13 is located in the groove 112 a . Alternatively, a portion of the sampling component 13 may be located in the groove 112 a , or the entire sampling component 13 may be located in the groove 112 a .

[0106] In the embodiment of the present invention, a protrusion 112 can be formed on the first box wall 110 and a groove 112a can be provided inside the protrusion 112. The positions of the protrusion 112 and the groove 112a can be adapted to the setting of the sampling component 13. By setting at least a portion of the sampling component 13 in the groove 112a, the portion of the first box wall 111 where the protrusion 112 is not provided can be placed closer to the battery cell assembly 12. In this way, it is also possible to reduce the amount of idle and unused space near the sampling component 13, thereby helping to reduce the waste of space in the box body 11 for arranging the sampling component 13, and helping to make the space in the box body 11 for placing the battery cell component 12 more regular, and helping to make the structure of the battery device 10 more compact and the space utilization in the battery device 10 more reasonable; by forming the protrusion 112, in addition, providing the protrusion 112 on the first box wall 111 is also conducive to reducing the probability of the first box wall 111 being deformed by bending, twisting, etc., thereby improving the overall structural strength of the box body 11, and the sampling component 13 is at least partially located in the protrusion 112, and the protrusion 112 can also be used to strengthen the protection of the sampling component 13.

[0107] The specific method of forming the protrusion 112 is not limited. For example, a portion of the first box wall 111 is stamped out by a mold to form the protrusion 112 and the groove 112a on both sides of the box wall 110, respectively. Alternatively, the first box wall 111 can also be formed by molding to form the protrusion 112 and the groove 112a.

[0108] In some embodiments, see Figure 6 At least a portion of the sampling component 13 is placed on the surface of the battery cell component 12 .

[0109] The battery cell assembly 12 is provided with an electrode lead-out portion 122 , which is used to output or input current into the battery cell assembly 12 . The electrode lead-out portion 122 may protrude from the surface of the battery cell assembly 12 .

[0110] In the embodiment with the electrode lead portion 122, see Figure 6 and Figure 7 The battery cell assembly 12 includes a first wall surface 121 and an electrode lead portion 122 disposed on the first wall surface 121 . The sampling assembly 13 is located on the first wall surface 121 . Both the sampling assembly 13 and the electrode lead portion 122 are at least partially located in the groove 112 a .

[0111] The wall surface refers to the structure corresponding to each outer surface of the battery cell assembly 12. It is understandable that the battery cell assembly 12 may have one or more wall surfaces.

[0112] The first wall 121 is a wall of the battery cell assembly 12 where the electrode lead-out portion 122 is provided.

[0113] Thus, when the first box wall 111 has a protrusion 112 and a groove 112a is formed within the protrusion 112, at least a portion of the sampling assembly 13 and the electrode lead portion 122 can be placed within the groove 112a. The battery cell assembly 12, excluding the electrode lead portion 122, can be more conveniently grouped within the installation space 11a, reducing the amount of unused space within the box caused by the placement of the electrode lead portion 122 and the sampling assembly 13, thereby improving the space utilization of the installation space 11a. Furthermore, since both the electrode lead portion 122 and the sampling assembly 13 are at least partially located within the groove 112a, the protrusion 112 can provide a certain degree of protection for the sampling assembly 13 and the electrode lead portion 122.

[0114] It is understandable that the number of the protrusion 112 and the groove 112a can be one or more, and the number of the protrusion 112 and the groove 112a can be one-to-one corresponding, or the protrusion 112 can include multiple grooves 112a.

[0115] It is understandable that during the operation of the battery device 10 , the electrode lead portion 122 is prone to heat up due to the continuous flow of current.

[0116] In some embodiments, see Figure 6 and Figure 7 The sampling component 13 and the electrode lead portion 122 are at least partially located in the same groove 112a.

[0117] This is beneficial to improving the space utilization within a single groove 112a, reducing the number of grooves 112a, and making the distance between the sampling component 13 and the electrode lead-out portion 122 closer, making it easier to use the sampling component 13 to collect information from the electrode lead-out portion 122. In addition, the connection length of the sampling component 13 can also be set shorter to save materials.

[0118] The specific information of the electrode lead portion 122 collected by the sampling component 13 is not limited, such as voltage value, current value, temperature value, etc.

[0119] In some embodiments, see Figure 6 The battery device 10 further includes a busbar 14 , which is used to connect the electrode lead portions 122 of different battery cell assemblies 12 to achieve series and parallel electrical connections between the battery cell assemblies 12 .

[0120] It is understandable that during operation of the battery device 10 , the current bus 14 passes through the current bus and generates heat.

[0121] In some embodiments with a current bus 14, see Figure 6 and Figure 7The current collector 14 , the sampling assembly 13 and the electrode lead-out portion 122 are at least partially located in the same groove 112 a .

[0122] This is beneficial to improving the space utilization within a single groove 112a and reducing the number of grooves 112a; and is beneficial to the connection between the busbar 14 and the electrode lead-out portion 122, or is beneficial to making the distance between the sampling component 13 and the busbar or the electrode lead-out portion 122 closer, thereby facilitating the use of the sampling component 13 to collect information from the busbar or the electrode lead-out portion 122, and the connection length of the sampling component 13 can also be set shorter to save materials.

[0123] The specific information of the current collector 14 collected by the sampling component 13 is not limited, such as voltage value, current value, temperature value, etc.

[0124] In some embodiments, participation Figure 7 The battery cell assembly 12 includes a first battery cell assembly 12a, which includes a first electrode lead-out portion 1221 and a second electrode lead-out portion 1222. The sampling assembly 13 includes a first sampling assembly 130, which is electrically connected to the first battery cell assembly 12a. The groove 112a includes a first groove 112b, and the first electrode lead-out portion 1221, the second electrode lead-out portion 1222, and the first sampling assembly 130 are at least partially located in the first groove 112b.

[0125] The polarities of the first electrode lead portion 1221 and the second electrode lead portion 1222 may be the same or different. For example, the polarity of one is positive and the polarity of the other is negative.

[0126] The first groove 112 b refers to the groove 112 a that can accommodate at least a portion of the first electrode lead-out portion 1221 , at least a portion of the second electrode lead-out portion 1222 , and at least a portion of the first sampling assembly 130 .

[0127] This is beneficial for improving the space utilization rate in the first groove 112 b and also facilitates the centralized arrangement of the electrode lead portions 122 on the first battery cell assembly 12 a and unified sampling by the same sampling assembly 13 .

[0128] It is understandable that in an embodiment where there are multiple grooves 112a, some of the grooves 112a may be first grooves 112b, or all of the grooves 112a may be first grooves 112b.

[0129] In some embodiments, see Figure 8 , the groove length of the first groove 112b is greater than the groove width.

[0130] The groove length of the first groove 112b refers to the dimension of the projected length direction of the first groove 112b in the projection plane perpendicular to the concave direction of the first groove 112b, that is, Figure 8 L1 in.

[0131] The groove width of the first groove 112b refers to the dimension of the projection width direction of the first groove 112b in the projection plane perpendicular to the concave direction of the first groove 112b, that is, Figure 8 That is, L1>L2.

[0132] The straight line direction of the groove length of the first groove 112 b , ie, the groove length direction, and the straight line direction of the groove width of the first groove 112 b , ie, the groove width direction, are perpendicular to each other.

[0133] In some embodiments where the length of the first groove 112b is greater than the width, see Figure 9 The distance between the farthest points of the first electrode lead portion 1221 and the second electrode lead portion 1222 along the width direction of the first groove 112b is less than half of the maximum dimension of the first battery cell assembly 12a along the width direction of the first groove 112b.

[0134] The distance between the farthest points of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b refers to the distance between the two farthest points on the outline of the projection of the first electrode lead-out portion 1221 and the outline of the projection of the second electrode lead-out portion 1222 in the projection plane perpendicular to the recessed direction of the first groove 112b, that is, L3.

[0135] The maximum dimension of the first battery cell assembly 12a along the width direction of the first groove 112b is L4. In other words, L4>L3.

[0136] In this way, the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 are arranged more concentratedly on the first wall 121, which is conducive to reducing the size of the protrusion 112 to reduce the outer contour size of the battery device 10; it is conducive to forming a larger regular area in other parts of the first wall 121 to facilitate the arrangement of other components in the battery device 10, thereby improving the compactness of the structure of the battery device 10.

[0137] It can be understood that the groove length direction, the groove width direction and the concave direction of the groove 112a are perpendicular to each other.

[0138] Understandably, see Figure 9 At least a portion of the sampling assembly 13 can be placed in a regular area formed by the concentrated arrangement of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 on the first wall 121 .

[0139] Understandably, see Figure 9 , multiple battery cell assemblies 12 are arranged along the groove length direction of the first groove 112b.

[0140] In some embodiments where the length of the first groove 112b is greater than the width, see Figure 9 and Figure 10 In a projection plane perpendicular to the groove length direction of the first groove 112b, the projection of the first electrode lead portion 1221 and the projection of the second electrode lead portion 1222 at least partially overlap.

[0141] That is, at least a portion of the lead-out portion of the first battery device 10 is disposed opposite to the second lead-out portion along the length direction of the first groove 112 b .

[0142] In this way, it is beneficial to reduce the distance between the farthest points of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b, and further beneficial to reduce the size of the protrusion 112 along the groove width direction, which is beneficial to reducing the outer contour size of the battery device 10 and improving the adaptability of the battery device 10; it is beneficial to arrange the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 more concentratedly, so that both of them can enter the first groove 112b.

[0143] In some embodiments where the first groove 112b has a groove length greater than the groove width, Figure 9 and Figure 10 The first battery cell assembly 12a includes a first edge 12b and a second edge 12c that are opposite to each other along the width direction of the first groove 112b. The maximum distance between the first electrode lead portion 1221 and the first edge 12b is smaller than the maximum distance between the first electrode lead portion 1221 and the second edge 12c. The maximum distance between the second electrode lead portion 1222 and the first edge 12b is smaller than the maximum distance between the second electrode lead portion 1222 and the second edge 12c. The sampling assembly 13 is located between the first electrode lead portion 1221 or the second electrode lead portion 1222 that is closer to the second edge 12c and the second edge 12c.

[0144] The first edge 12b refers to a boundary of one end of the first wall surface 121 along the groove width direction; the second edge 12c refers to a boundary of the other end of the first wall surface 121 along the groove width direction.

[0145] See Figure 10 The maximum distance between the first electrode lead portion 1221 and the first edge 12b is L5, and the maximum distance between the first electrode lead portion 1221 and the second edge 12c is L6. L5<L6, which means that the first electrode lead portion 1221 is offset on the first wall 121 along the groove width direction.

[0146] See Figure 10The maximum distance between the second electrode lead portion 1222 and the first edge 12b is L7, and the maximum distance between the second electrode lead portion 1222 and the second edge 12c is L8. L7<L8, which means that the second electrode lead portion 1222 is offset on the first wall 121 along the groove width direction.

[0147] It can be understood that since L5 is less than L6 and L7 is less than L8, the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 are both offset on the first wall 121 on one side close to the first edge 12b in the groove width direction, so that the area where the first wall 121 is located between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 and the second edge 12c is larger than the area where the first wall 121 is located between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 and the first edge 12b.

[0148] In this way, the first electrode lead portion 1221 and the second electrode lead portion 1222 can be arranged more concentratedly toward the first edge 12b, and the first electrode lead portion 1221 and the second electrode lead portion 1222 can simultaneously extend into the first groove 112b. In this way, the surface of the first battery cell assembly 12a closer to the second edge 12c is more regular and can be closer to the area of ​​the first box wall 111 where the protrusion 112 is not provided, thereby reducing the waste of space within the box body 11. Alternatively, the space on the side of the first electrode lead portion 1221 and the second electrode lead portion 1222 facing the second edge 12c can be used to place other components, such as the sampling assembly 13. The sampling assembly 13 can also at least partially extend into the first groove 112b to utilize part of the space in the first groove 112b.

[0149] In some embodiments, see Figure 7 and Figure 9 The first sampling assembly 130 is located on the same side of the first electrode lead portion 1221 and the second electrode lead portion 1222 along the width direction of the first groove 112 b.

[0150] The sampling component 13 may be located on the side of the first electrode lead-out portion 1221 away from the second electrode lead-out portion 1222 along the slot width direction, or the sampling component 13 may be located on the side of the second electrode lead-out portion 1222 away from the first electrode lead-out portion 1221 along the slot width direction.

[0151] In this way, the first sampling assembly 130 does not need to be installed between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, making installation more convenient. Furthermore, since the current bus 14 needs to be connected to the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, installing the first sampling assembly 130 on one side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 can reduce the probability of interference between the current bus 14 and the first sampling assembly 130. Because the first sampling assembly 130 is located on one side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, which are of similar size, can be arranged more centrally. This arrangement of the first sampling assembly 130 can more effectively utilize the more regular area adjacent to the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, further rationalizing the use of the internal space of the battery device 10. It is understandable that the sampling assembly 13 can be electrically connected to the plurality of battery cell assemblies 12 and collect information collected from each battery cell assembly 12 and transmit it to the BMS.

[0152] In some embodiments, the sampling assembly 13 includes a main body 131 and a terminal 132 . The main body 131 is attached to the first wall 121 and offset from the electrode lead 122 . The terminal 132 is connected to the main body 131 and the battery cell assembly 12 .

[0153] The terminal portion 132 is used to collect information required by an object in contact with it. The terminal portion 132 can be used to contact components in the battery device 10 such as the busbar 14 and the electrode lead portion 122.

[0154] The main body 131 is used to collect information collected by the terminal portion 132 and transmit the information to the BMS.

[0155] In this way, the main body 131 and the electrode lead-out portion 122 are offset to avoid direct contact between the two, thereby reducing the adverse effect of the electrode lead-out portion 122 on the accuracy of sampling information of the sampling component 13; at the same time, the main body 131 is larger in size, which is conducive to arranging the main body 131 on the regular area formed on the first wall 121, thereby reducing the probability of interference between the main body 131 and other components.

[0156] It is understandable that there are multiple terminal portions 132 for collecting information of different battery cell assemblies 12 and different busbars 14 .

[0157] In the embodiment where multiple battery cell assemblies 12 are arranged along the slot length direction, refer to Figure 9 The main body 131 extends along the slot length direction, and the plurality of terminal portions 132 are arranged along the slot length direction so as to collect information of each battery cell assembly 12 and the busbar 14 electrically connecting each battery cell assembly 12 .

[0158] It is understandable that during the use of the battery device 10, due to the electrochemical reaction, the battery cell assembly 12 will expand to a certain extent, and the terminal portion 132 will change position with the expansion of the battery cell assembly 12, while the main body 131 will not. Especially in the arrangement direction of multiple battery cell assemblies 12, after the expansion deformation of each battery cell assembly 12 accumulates, the position of the main body 131 relative to each terminal portion 132 will change significantly, resulting in tension between the main body 131 and the terminal portion 132, which can easily cause damage to the sampling assembly 13.

[0159] In some implementations where a busbar 14 is provided, see Figure 9 The terminal portion 132 is at least partially bent to connect to at least one of the electrode lead portion 122 and the current bus 14 .

[0160] In this way, if the electrode lead portion 122 and the main body 131 have different dimensions along a direction perpendicular to the first box wall 111, the two can be connected by bending the terminal portion 132, thereby facilitating the placement of the first electrode lead portion 1221, the second electrode lead portion 1222, and the first sampling assembly 130 within the first groove 112b. Furthermore, when the battery cell assembly 12 expands or shifts, the deformation of the bent portion of the terminal portion 132 can reduce the tension between the terminal portion 132 and the main body 131, thereby reducing the probability of damage to the sampling assembly 13 under the action of tension and extending the service life of the sampling assembly 13.

[0161] The specific type of the sampling component 13 is not limited. For example, at least a portion of the sampling component 13 is a Flexible Printed Circuit (FPC).

[0162] It is understandable that the dimensions of the first electrode lead portion 1221 and the second electrode lead portion 1222 along the recessed direction of the groove 112 a are different from the dimensions of the sampling assembly 13 along the recessed direction of the groove 112 a .

[0163] In some embodiments, see Figure 7The first sampling assembly 130 is located on one side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b. The space within the first groove 112b includes a first accommodating space 112c and a second accommodating space 112d. The maximum dimension of the first accommodating space 112c along the groove depth direction of the first groove 112b is smaller than the maximum dimension of the second accommodating space 112d along the groove depth direction of the first groove 112b. The first accommodating space 112c is used to accommodate at least part of the sampling assembly 13, and the second accommodating space 112d is used to accommodate at least part of the first electrode lead-out portion 1221 and at least part of the second electrode lead-out portion 1222.

[0164] The groove depth direction is the concave direction of the groove 112a.

[0165] The maximum dimension of the first accommodation space 112c along the groove depth direction of the first groove 112b is L9; the maximum dimension of the second accommodation space 112d along the groove depth direction of the first groove 112b is L10.

[0166] L9 < L10, resulting in a stepped inner wall of the first groove 112b. The first accommodating space 112c is used to accommodate the sampling assembly 13, such that the dimension of the first accommodating space 112c along the groove depth direction is compatible with the dimension of the sampling assembly 13 along the groove depth direction. The second accommodating space 112d is used to accommodate the first electrode lead portion 1221 and the second electrode lead portion 1222, such that the dimension of the first accommodating space 112c along the groove depth direction is compatible with the dimension of the first electrode lead portion 1221 and the dimension of the second electrode lead portion 1222 along the groove depth direction.

[0167] In this way, it is beneficial to reduce the waste of space in the first groove 112 b, and to reduce the total volume of the first groove 112 b, thereby reducing the outer contour size of the protrusion 112 .

[0168] In some embodiments, see Figure 8 There are two first accommodating spaces 112c, and one second accommodating space 112d. The two first accommodating spaces 112c are respectively located on one side of the second accommodating space 112d along the groove width direction.

[0169] Each first accommodation space 112c is used to accommodate a sampling assembly 13, and the second accommodation space 112d can accommodate two groups of battery cell assemblies 12 arranged side by side along the slot width direction, each group including multiple battery cell assemblies 12 arranged along the slot length direction.

[0170] In this way, more electrode lead portions 122 and sampling components 13 share the same groove 112 a , which helps to reduce the number of protrusions 112 on the box wall 110 and further improve the compactness of the battery device 10 .

[0171] Understandably, see Figure 7 The protrusion 112 includes two parts with different maximum dimensions along its protruding direction. The first accommodating space 112c is located in one part, and the second accommodating space 112d is located in the other part. In this way, the wall thickness of each part of the protrusion 112 is kept consistent, which facilitates the processing and manufacturing of the protrusion 112.

[0172] In some embodiments, see Figure 11 The first sampling assembly 130 is located on a side of the first electrode lead portion 1221 and the second electrode lead portion 1222 facing the bottom wall of the first groove 112 b.

[0173] The bottom wall of the first groove 112 b refers to the inner wall of the first groove 112 b away from the opening thereof along the groove depth direction.

[0174] The first sampling assembly 130 is located between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the depth direction of the groove 112 a and the bottom wall of the first groove 112 b .

[0175] This helps simplify the internal shape of the first groove 112 b and facilitates the processing and manufacturing of the first groove 112 b . At the same time, it helps the first sampling component 130 to be close to the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 .

[0176] The specific number of the protrusions 112 is not limited, and can be one or more.

[0177] In some embodiments, see Figure 12 The battery cell assembly 12 includes a first electrode lead-out portion 1221, and the sampling assembly 13 includes a first sampling assembly 130. The first sampling assembly 130 is connected to the first electrode lead-out portion 1221. The protrusion 112 includes a first protrusion 1121 and a second protrusion 1122. The first protrusion 1121 and the second protrusion 1122 are spaced apart on the first box wall 111. A first recess 1121a is formed in the first protrusion 1121, and a second recess 1122a is formed in the second protrusion 1122. The first recess 1121a is used to accommodate at least a portion of the first sampling assembly 130, and the second recess 1122a is used to accommodate at least a portion of the first electrode lead-out portion 1221.

[0178] The first recess 1121 a and the second recess 1122 a are grooves 112 a independent of each other.

[0179] That is, the groove 112 a for accommodating the first sampling component 130 and the groove 112 a for accommodating the first electrode portion are not the same groove 112 a .

[0180] In this way, when the sampling assembly 13 is arranged at a distance from the electrode lead-out portion 122 , the total volume of each protrusion 112 is reduced to improve the space utilization rate within the protrusion 112 .

[0181] In some embodiments having a main body 131 and a terminal 132 , at least a portion of the main body 131 is located in the first recess 1121 a , and the terminal 132 extends from the installation space 11 a into the second recess 1122 a and connects to the first electrode lead 1221 .

[0182] In some embodiments, see Figure 13 and Figure 14 The battery cell assembly 12 includes a first wall 121 and a second wall 123 . The sampling assembly 13 is located on the first wall 121 . The second wall 123 is provided with an electrode lead-out portion 122 . The first wall 121 faces the first box wall 111 .

[0183] That is, the sampling assembly 13 and the electrode lead-out portion 122 are arranged on different walls of the battery cell assembly 12 .

[0184] In this way, only the size adaptation of the sampling assembly 13 and the groove 112 a needs to be considered, which improves the flexibility of the arrangement and reduces the difficulty of designing and manufacturing the groove 112 a.

[0185] In some embodiments, see Figure 13 and Figure 14 The first wall surface 121 and the second wall surface 123 are two adjacent connected wall surfaces.

[0186] It can be understood that, in some embodiments, some electrode lead-out portions 122 are disposed on the first wall surface 121 , and other electrode lead-out portions 122 are disposed on the second wall surface 123 .

[0187] It can be understood that, in some embodiments, the outer surface of the electrode lead-out portion 122 is flush with the second wall 123 , and therefore, the groove 112 a may be provided only on the first box wall 111 opposite to the first wall 121 .

[0188] In some embodiments, see Figure 13 and Figure 14 The protruding portion 112 includes a third protruding portion 1123 located on the first box wall 111, and a second groove 1123a with an opening 11b facing the installation space 11a is provided in the third protruding portion 1123, and at least a portion of the sampling component 13 is located in the second groove 1123a; the multiple box walls 110 also include a second box wall 113, and the protruding portion 112 also includes a fourth protruding portion 1131 located on the second box wall 113, and a third groove 112a with an opening 11b facing the installation space 11a is provided in the fourth protruding portion 1131, and at least a portion of the electrode lead-out portion 122 is located in the third groove 112a.

[0189] The third protrusion 1123 and the fourth protrusion 1131 are located on different box walls 110 .

[0190] In this way, the grooves 112a located on different box walls 110 can accommodate the sampling components 13 and electrode lead portions 122 located on different wall surfaces, thereby improving the flexibility of the arrangement and further facilitating the improvement of the structural compactness of the battery device 10 .

[0191] It should be noted that, since the number of sampling assemblies 13 and the number of electrode assemblies can be multiple, in the embodiment with the third protrusion 1123 and the fourth protrusion 1131, the first protrusion 1121 and the second protrusion 1122 may also be provided, or the first protrusion 1121 and the second protrusion 1122 may not be provided.

[0192] In some embodiments, see Figure 13 and Figure 14 The first box wall 111 and the second box wall 113 are two adjacent box walls 110 connected.

[0193] The specific number of the first box wall 111 and the second box wall 113 is not limited, and they can be one or more.

[0194] In some embodiments, see Figure 14 The third protrusion 1123 is located at one end of the first box wall 111 close to the second box wall 113 , and the fourth protrusion 1131 is located at one end of the second box wall 113 close to the first box wall 111 .

[0195] This helps shorten the distance between the third protrusion 1123 and the fourth protrusion 1131, thereby facilitating the sampling assembly 13 to be closer to the electrode lead-out portion 122 for electrical connection with the electrode lead-out portion 122, reducing the size of the sampling assembly 13, and further helping to reduce the size of the third protrusion 1123.

[0196] In some embodiments, see Figure 14 The second groove 1123a and the third groove 112a are directly connected to each other, so that the sampling assembly 13 is connected to the electrode lead-out portion 122 through the connection position between the second groove 1123a and the third groove 112a, thereby facilitating the reduction of the space occupied by the sampling assembly 13 in the installation space 11a, thereby facilitating the arrangement of a battery cell assembly 12 with a larger capacity.

[0197] In some embodiments, the battery cell assembly 12 is a single battery cell 124 , which helps to simplify the internal structure of the battery device 10 , reduce the number of components in the battery device 10 , and improve the energy density of the battery device 10 .

[0198] In some embodiments, see Figure 15 The battery cell assembly 12 includes a housing 125 and a plurality of battery cells 124 housed within the housing 125. In other words, the plurality of battery cells 124 are connected in series or in parallel to form a battery cell group 124. The housing 125 encloses the entire battery cell group 124. The battery cell group 124 uses a common electrode lead 122 for charge and discharge.

[0199] In this way, the outer shell 125 is helpful in maintaining the outer contour of the battery cell assembly 12, especially when the battery cell 124 is a soft-pack battery cell, so that the battery cell assembly 12 can be placed regularly and stably inside the battery device 10, thereby improving the space utilization inside the battery device 10 and enhancing the safety of use; and, multiple battery cells 124 located in the outer shell 125 of the same battery cell assembly 12 can be connected to the outside using the same group of electrode lead-out portions 122, and the structure is simple.

[0200] In some embodiments, see Figure 4 、 Figure 5 and Figure 11 The first box wall 111 includes a main body 114 and a protruding portion 112. The protruding portion 112 protrudes from the main body 114 in a direction away from the installation space 11a. The maximum protruding dimension of the protruding portion 112 is less than or equal to 10 mm (millimetre, millimeter).

[0201] See Figure 11 The maximum protruding dimension of the protruding portion 112 is L11, and L11≤10mm.

[0202] In this way, the difficulty of forming the protrusion 112 is reduced, which is beneficial to reducing the manufacturing cost; at the same time, it is beneficial to reduce the probability of the protrusion 112 interfering with other objects outside the battery device 10, which is beneficial to improving the adaptability of the battery device 10.

[0203] The specific range of the maximum protruding size of the protrusion 112 is 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0204] The specific embodiment of the battery device 10 of the present invention is as follows:

[0205] The battery device 10 includes a box body 11, a sampling assembly 13, a current collector 14 and a plurality of battery cell assemblies 12. The box body 11 includes a plurality of box walls 110. The plurality of box walls 110 are collectively arranged to form an installation space 11a. The plurality of box walls 110 include a first box wall 111. The first box wall 111 is provided with a protrusion 112 protruding in a direction away from the installation space 11a. The protrusion 112 is provided with a groove 112a. The opening 11b of the groove 112a faces the installation space 11a so that the space in the groove 112a is connected to the installation space 11a. The body assembly 12 is disposed within the installation space 11a. The battery cell assembly 12 includes a first battery cell assembly 12a, which includes a first electrode lead portion 1221 and a second electrode lead portion 1222. The sampling assembly 13 includes a first sampling assembly 130, which is electrically connected to the first battery cell assembly 12a. The groove 112a includes a first groove 112b, with the first electrode lead portion 1221, the second electrode lead portion 1222, and the first sampling assembly 130 all at least partially located within the first groove 112b. The groove length of the first groove 112b is greater than the groove width, and the distance between the farthest points of the first electrode lead portion 1221 and the second electrode lead portion 1222 along the groove width of the first groove 112b is less than half the maximum dimension of the first battery cell assembly 12a along the groove width of the first groove 112b. In a projection plane perpendicular to the length of the first groove 112b, the projection of the first electrode lead portion 1221 and the projection of the second electrode lead portion 1222 at least partially overlap. The first battery cell assembly 12a includes a first edge 12b and a second edge 12c disposed opposite each other along the groove width of the first groove 112b. The maximum distance between the first electrode lead portion 1221 and the first edge 12b is less than the maximum distance between the first electrode lead portion 1221 and the second edge 12c. The maximum distance between the second electrode lead portion 1222 and the first edge 12b is less than the maximum distance between the second electrode lead portion 1222 and the second edge 12c. The sampling assembly 13 is located between the first electrode lead portion 1221 or the second electrode lead portion 1222, whichever is closer to the second edge 12c, and the second edge 12c. The first sampling assembly 130 is located on the same side of the first electrode lead portion 1221 and the second electrode lead portion 1222 along the groove width of the first groove 112b. The sampling assembly 13 includes a main body 131 and a terminal portion 132. The main body 131 is attached to the first wall 121 and offset from the electrode lead portion 122. The terminal portion 132 is connected to the main body 131 and the battery cell assembly 12. The terminal portion 132 is at least partially bent to connect to at least one of the electrode lead portion 122 and the current bus 14.The space within the first groove 112b includes a first accommodating space 112c and a second accommodating space 112d. The maximum dimension of the first accommodating space 112c along the groove depth direction of the first groove 112b is smaller than the maximum dimension of the second accommodating space 112d along the groove depth direction of the first groove 112b. The first accommodating space 112c is used to accommodate at least part of the sampling assembly 13, and the second accommodating space 112d is used to accommodate at least part of the first electrode lead-out portion 1221 and at least part of the second electrode lead-out portion 1222.

[0206] An embodiment of the present invention further provides an electrical device, which includes the battery device 10 in any of the aforementioned embodiments, and the battery device 10 serves as a power source for the electrical device.

[0207] In this way, by improving the compactness of the structure of the battery device 10, it is beneficial to improve the compactness of the arrangement of other components in the electrical device and improve space utilization.

[0208] In some embodiments, see Figure 16 and Figure 17 The electrical device is a vehicle 100, which further includes a frame 20. The battery device 10 is mounted on the frame 20. A receiving compartment 20a is provided in the frame 20, and a portion of the protrusion 112 extends into the receiving compartment 20a.

[0209] The vehicle frame 20 refers to a frame structure of the vehicle 100 formed by splicing multiple beams.

[0210] The battery device 10 and the vehicle frame 20 may be fixedly connected; or the battery device 10 may be detachable so as to facilitate maintenance and replacement of the battery device 10 .

[0211] In this way, through the cooperation between the accommodating chamber 20a and the protrusion 112, a portion of the battery device 10 can utilize the space inside the frame 20, thereby facilitating improvement of space utilization of the vehicle 100 and increasing the capacity of the battery device 10 in the vehicle 100.

[0212] In some embodiments, see Figure 17 The frame 20 includes a mounting beam 21, which is provided on one side of the battery device 10 along the vehicle height direction. The mounting beam 21 is provided with a accommodating chamber 20a, which is open toward one side of the battery device 10 along the vehicle height direction to form an opening. At least a portion of the protrusion 112 extends into the accommodating chamber 20a through the opening.

[0213] The mounting beam 21 refers to a beam structure within the vehicle frame 20 that can be used to mount other components of the vehicle 100, such as seats, a center console, and doors. The mounting beam 21 used to provide the storage compartment 20a can include at least one of the vehicle body beam structures, such as a seat beam, a floor cross beam, a floor longitudinal beam, a center tunnel beam, and a door sill beam.

[0214] In this way, the utilization rate of the internal space of the mounting beam 21 can be improved, which is beneficial for increasing the capacity of the battery device 10 in the vehicle 100 .

[0215] In some embodiments where the number of the protrusions 112 is multiple, see Figure 16 and Figure 17 , the protruding direction of at least part of the protruding portion 112 is the vehicle height direction.

[0216] The specific method of forming the accommodating chamber 20a by the mounting beam 21 is not limited. For example, the accommodating chamber 20a is formed by bending the plate multiple times to form the interior of the bulge structure, and the opening of the bulge structure forms the opening of the accommodating chamber 20a.

[0217] In some embodiments, see Figure 16 and Figure 17 The vehicle 100 further includes a passenger compartment floor 22 . The vehicle frame 20 and the passenger compartment floor 22 together enclose a passenger compartment 20 c of the vehicle 100 . The battery device 10 is located on a side of the passenger compartment floor 22 facing away from the passenger compartment 20 c .

[0218] That is, the box wall 110 of the battery device 10 is not formed to enclose the passenger compartment 20c. In these embodiments, the mounting beam 21 is connected to the passenger compartment floor 22. Figure 17 The passenger compartment floor 22 is provided with a bulge facing away from the battery device 10, the bulge is open toward one side of the battery device 10, the bulge extends into the accommodating chamber 20a, and the protrusion 112 extends into the bulge to achieve the purpose of extending a portion of the protrusion 112 into the accommodating chamber 20a.

[0219] In some embodiments, see Figure 18 The vehicle 100 includes a passenger compartment 20 c , and the first box wall 111 forms a passenger compartment floor 22 of the vehicle 100 .

[0220] That is to say, the first box wall 111 and the passenger compartment floor 22 are the same component and can be used to directly place components such as seats and carpets in the vehicle 100.

[0221] This helps reduce the number of components in the vehicle 100 and improves the compactness of the vehicle 100 structure.

[0222] The specific type of the storage compartment 20a is not limited, and it can be used to accommodate other structural components, personnel, and cargo in the vehicle 100. In some embodiments, the passenger compartment 20c is a part of the storage compartment 20a.

[0223] The various embodiments / implementations provided by the present invention can be combined with each other without causing any contradiction.

[0224] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery device, characterized in that: The battery device comprises: The box body includes a plurality of box walls, the plurality of box walls are collectively arranged to form an installation space, the plurality of box walls include a first box wall, the first box wall is provided with a protrusion protruding in a direction away from the installation space, the protrusion is provided with a groove, and the opening of the groove faces the installation space so that the space in the groove is connected to the installation space; A plurality of battery cell assemblies are arranged in the installation space; A sampling assembly is used to obtain information about the battery cell assembly, and at least a portion of the sampling assembly is located in the groove.

2. The battery device according to claim 1, wherein: The battery cell assembly includes a first wall and an electrode lead-out portion provided on the first wall, and the sampling assembly is located on the first wall. The sampling component and the electrode lead-out portion are at least partially located in the groove.

3. The battery device according to claim 2, characterized in that The sampling component and the electrode lead-out portion are at least partially located in the same groove.

4. The battery device according to claim 3, characterized in that The battery device further includes a busbar, which is used to connect the electrode lead-out portions of different battery cell assemblies. The busbar, the sampling assembly, and the electrode lead-out portions are at least partially located in the same groove.

5. The battery device according to claim 3, wherein: The battery cell assembly includes a first battery cell assembly, the first battery cell assembly includes a first electrode lead portion and a second electrode lead portion, the sampling assembly includes a first sampling assembly, the first sampling assembly is electrically connected to the first battery cell assembly, the groove includes a first groove, the first electrode lead portion, the second electrode lead portion and the first sampling assembly are at least partially located in the first groove.

6. The battery device according to claim 5, characterized in that The groove length of the first groove is greater than the groove width, and the distance between the farthest points of the first electrode lead portion and the second electrode lead portion along the groove width direction of the first groove is less than half of the maximum dimension of the first battery cell assembly along the groove width direction of the first groove.

7. The battery device according to claim 5, characterized in that The groove length of the first groove is greater than the groove width, and in a projection plane perpendicular to the groove length direction of the first groove, the projection of the first electrode lead portion and the projection of the second electrode lead portion at least partially overlap.

8. The battery device according to claim 5, characterized in that The groove length of the first groove is greater than the groove width. The first battery cell assembly includes a first edge and a second edge arranged opposite to each other along the groove width direction of the first groove. The maximum distance between the first electrode lead-out portion and the first edge is smaller than the maximum distance between the first electrode lead-out portion and the second edge. The maximum distance between the second electrode lead-out portion and the first edge is smaller than the maximum distance between the second electrode lead-out portion and the second edge. The sampling assembly is located between the first electrode lead-out portion and the second electrode lead-out portion, whichever is closer to the second edge.

9. The battery device according to any one of claims 5 to 8, characterized in that The first sampling assembly is located on the same side of the first electrode lead-out portion and the second electrode lead-out portion along the groove width direction of the first groove.

10. The battery device according to claim 9, characterized in that The first sampling assembly includes a main body and a terminal. The main body is attached to the first wall and is staggered with the electrode lead-out portion. The terminal is connected to the main body and the battery cell assembly.

11. The battery device according to claim 10, characterized in that The battery device further includes a current bus bar, and the terminal portion is at least partially bent to be connected to at least one of the electrode lead portion and the current bus bar.

12. The battery device according to claim 5, characterized in that The first sampling component is located on one side of the first electrode lead-out portion and the second electrode lead-out portion along the groove width direction of the first groove. The space within the first groove includes a first accommodating space and a second accommodating space. The maximum dimension of the first accommodating space along the groove depth direction of the first groove is smaller than the maximum dimension of the second accommodating space along the groove depth direction of the first groove. The first accommodating space is used to accommodate at least part of the sampling assembly, and the second accommodating space is used to accommodate at least part of the first electrode lead-out portion and at least part of the second electrode lead-out portion.

13. The battery device according to claim 5, characterized in that The first sampling assembly is located on a side of the first electrode lead-out portion and the second electrode lead-out portion facing the bottom wall of the first groove.

14. The battery device according to claim 2, wherein: The battery cell assembly includes a first electrode lead-out portion, the sampling assembly includes a first sampling assembly, the first sampling assembly is connected to the first electrode lead-out portion, the protrusion includes a first protrusion and a second protrusion, the first protrusion and the second protrusion are spaced apart on the first box wall, a first recess is formed in the first protrusion, and a second recess is formed in the second protrusion, the first recess is used to accommodate at least a portion of the first sampling assembly, and the second recess is used to accommodate at least a portion of the first electrode lead-out portion.

15. The battery device according to claim 1, wherein: The battery cell assembly includes a first wall and a second wall. The sampling assembly is located on the first wall. The second wall is provided with an electrode lead-out portion. The first wall faces the first box wall.

16. The battery device according to claim 15, characterized in that The protrusion includes a third protrusion located on the first box wall, the third protrusion is provided with a second groove opening toward the installation space, and at least a portion of the sampling assembly is located in the second groove; The multiple box walls also include a second box wall, and the protrusion also includes a fourth protrusion located on the second box wall. The fourth protrusion is provided with a third groove opening toward the installation space, and at least part of the electrode lead-out portion is located in the third groove.

17. The battery device according to claim 16, characterized in that The third protrusion is located at one end of the first box wall close to the second box wall, and the fourth protrusion is located at one end of the second box wall close to the first box wall.

18. The battery device according to claim 1, wherein: The battery cell assembly is a single battery cell, or the battery cell assembly includes a housing and a plurality of battery cells accommodated in the housing.

19. The battery device according to claim 1, wherein: The first box wall includes a main body and the protruding portion. The protruding portion protrudes from the main body in a direction away from the installation space. The maximum protruding dimension of the protruding portion is less than or equal to 10 mm.

20. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 19, and the battery device is used to provide electrical energy for the electrical device.

21. The electrical device according to claim 20, characterized in that: The power-consuming device is a vehicle, and the vehicle further comprises a frame, and the battery device is mounted on the frame. A storage compartment is provided in the vehicle frame, and a portion of the protrusion extends into the storage compartment.

22. The electrical device according to claim 21, characterized in that: The frame includes a mounting beam, which is arranged on one side of the battery device along the vehicle height direction. The mounting beam is provided with the accommodating bin, and the accommodating bin is open to form an opening along the vehicle height direction toward the side of the battery device. At least part of the protrusion extends into the accommodating bin through the opening.

23. The electrical device according to claim 21, characterized in that: The vehicle comprises a passenger compartment, and the first box wall forms a passenger compartment floor of the vehicle.

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