Battery device and electric device

Abstract

The invention discloses a battery device and a power utilization device. The battery device comprises a battery box and a battery monomer, the battery box comprises a cover body assembly and a box body, the battery box defines a containing cavity, the battery monomer is contained in the containing cavity, the cover body assembly is matched with the box body to seal the containing cavity, the cover body assembly is provided with a sampling assembly, the sampling assembly is in contact with the battery monomer, and the cover body assembly comprises a first cover body and a second cover body; the first cover body is matched with the box body to seal the containing cavity, and the second cover body is arranged between the first cover body and the box body in the first direction. The edge of the first cover body is provided with a first flange, the edge of the box body is provided with a second flange, the edge of the second cover body is provided with a flange part, and the first flange, the flange part and the second flange are connected with one another. According to the battery device, the sampling assembly and the cover body assembly can be integrated, and the internal space of the battery device is fully utilized, so that the internal layout of the battery device is more compact, and the processing and assembling efficiency and the sealing performance of the battery device are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery devices and electrical devices. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power in whole or in part. In the field of energy storage, the batteries can be installed in the energy storage box or directly on the user side. As the demand for batteries continues to increase, the industry's requirements for the assembly efficiency of battery devices are also constantly increasing. Therefore, how to improve the assembly efficiency of battery devices is one of the research and development topics of the industry. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a battery device and an electrical device.

[0005] This application is implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a battery device, which includes a battery box and a battery cell, wherein the battery box includes a cover assembly and a box, wherein the battery box defines a accommodating cavity, wherein the battery cell is accommodated in the accommodating cavity, wherein the cover assembly cooperates with the box to close the accommodating cavity, wherein the cover assembly is provided with a sampling assembly, wherein the sampling assembly contacts the battery cell and is used for sampling the battery cell; wherein the cover assembly includes a first cover and a second cover, wherein the first cover cooperates with the box to close the accommodating cavity, wherein the second cover is arranged between the first cover and the box along a first direction, wherein the first direction is a thickness direction of the second cover; wherein a first flange is arranged at an edge of the first cover, a second flange is arranged at an edge of the box, and a flange is arranged at an edge of the second cover, wherein the first flange, the flange and the second flange are connected to each other.

[0007] Therefore, by integrating the sampling assembly with the cover assembly, not only can the overall structural design of the battery device be simplified, but also the internal structure of the battery device can be made more compact. Through the integrated design, the space inside the battery device is fully utilized, so that the internal layout of the battery device is more compact, and the overall structure of the battery device is simplified. In addition, the setting of the first flange and the second flange can improve the structural strength of the edge of the box, reduce the risk of external impact vibration damaging the internal components of the box, and improve the stability of the box. At the same time, the first flange and the second flange are also conducive to mutual connection, and the cooperation with the flange part can also improve the connection strength and sealing of the box. During the processing, the first cover body, the second cover body and the sampling assembly can be pre-assembled, and then the cover assembly and the box body are connected in cooperation, which reduces the process of separate assembly, improves the assembly efficiency of the battery device, and facilitates the disassembly and replacement of the sampling assembly during maintenance.

[0008] In some embodiments, the sampling assembly is detachably connected to the second cover.

[0009] Thus, the sampling assembly is detachably connected to the second cover body, which can meet various sampling requirements and adapt to multiple scenarios, such as the temporary addition of sampling or the rapid replacement of sampling assemblies during maintenance, thereby improving the layout flexibility and maintenance efficiency of the sampling assembly. In addition, during production and processing, the sampling assembly can be pre-integrated with the cover assembly and integrated from the process end, thereby improving the assembly efficiency of the battery box.

[0010] In some embodiments, a first accommodating cavity is defined between the first cover body and the second cover body, and the first accommodating cavity accommodates a battery management system; a second accommodating cavity is defined between the box body and the second cover body, and the second accommodating cavity accommodates the battery cell; and the sampling assembly is electrically connected to the battery management system.

[0011] Since the first accommodating cavity is defined between the first cover body and the second cover body, and the first accommodating cavity accommodates the battery management system, the battery management system can utilize the cavity space of the cover body assembly without occupying the second accommodating cavity where the battery cell is set, which is conducive to improving the space utilization rate of the battery device and further improving the capacity of the battery device. In addition, during the production and processing process, the battery management system can be synchronized with the cover body assembly. The separate assembly process is reduced, and the assembly efficiency of the battery device is improved.

[0012] In some embodiments, the sampling assembly includes a plurality of sampling units, each of the sampling units is disposed corresponding to each of the battery cells, and the sampling unit includes at least one sampling module, and the sampling module is detachably connected to the second cover.

[0013] Since each sampling unit is set corresponding to each battery cell, the sampling module can be set corresponding to the battery cell, which is conducive to independent sampling and accurate monitoring of the status (such as voltage, temperature, etc.) of each battery cell, and improves the accuracy and timeliness of sampling. In addition, the sampling module and the second cover body are connected in a detachable manner, so that when a sampling module needs to be repaired or replaced, there is no need to disassemble the entire sampling assembly as a whole, which reduces maintenance time and maintenance costs and improves the reliability of the battery device.

[0014] In some embodiments, the sampling module includes a cylinder extending along the first direction, and the second cover body has a first mounting hole, and the cylinder can pass through the first mounting hole; a sampling layer is provided at one end of the cylinder, and a first flange is provided at the other end, and the sampling layer is in contact with the battery cell, and along the first direction, the first flange abuts against the side of the second cover body away from the battery cell along the first direction.

[0015] Since the sampling layer and the battery cell are sampled by contact, the sampling module sampling accuracy and timeliness are improved, and it is also convenient to separate and replace the sampling module during maintenance, thereby improving maintenance efficiency. In addition, the first flange abuts against the second cover body, which is conducive to sealing the first installation through hole and separating the first accommodating cavity from the second accommodating cavity. The abutting method is also conducive to the installation and removal of the sampling assembly.

[0016] In some embodiments, the sampling module further includes a second flange detachably connected to the barrel; the second cover is located between the first flange and the second flange along the first direction, and the second flange is connected to the second cover.

[0017] Since the second cover body is located between the first flange and the second flange along the first direction, the first flange and the second flange can abut the second cover body from both sides of the first direction, thereby improving the stability of the sampling module after installation. The detachable cooperation between the two is also conducive to disassembly, thereby improving maintenance efficiency.

[0018] In some embodiments, the sampling unit further includes a bracket, the bracket is provided with a second mounting through hole, the cylinder passes through the second mounting through hole, and the bracket is fixedly connected to the second cover body.

[0019] Thus, the bracket can provide a stable support for the sampling module, cooperate with the first flange and the second flange to abut the second cover body, and improve the stability of the sampling module after installation. Since the bracket is fixedly connected to the second cover body, the risk of the sampling module falling off due to external vibration and impact is reduced, and the stability of the battery device is further improved.

[0020] In some embodiments, the sampling module includes a first sampling module, the first sampling module includes a temperature sampling component disposed in the barrel, the sampling layer includes a heat-conducting layer, and the temperature sampling component is in contact with the heat-conducting layer.

[0021] As a result, the thermal conductive layer can efficiently transfer heat from the measured battery cell to the temperature sampling component, reducing the temperature measurement error caused by poor contact or air gap, and is suitable for precise temperature control requirements under various complex working conditions, improving the temperature sampling accuracy. In addition, while enhancing the efficiency of heat conduction, the thermal conductive layer can also play a buffering and protective role to a certain extent, reducing the risk of collision between the battery cell and the sampling module when subjected to vibration shock, and further improving the stability of the sampling component.

[0022] In some embodiments, the sampling module includes a second sampling module, the second sampling module includes a voltage sampling component disposed in the barrel, the voltage sampling component is disposed in the barrel, the sampling layer includes a conductive layer, and the voltage sampling component is conductively connected to the conductive layer.

[0023] Therefore, by providing a conductive layer between the voltage sampling component and the battery cell, good electrical contact can be provided for voltage sampling, thereby reducing voltage measurement errors caused by contact resistance or air gaps and improving voltage sampling accuracy.

[0024] In some embodiments, the battery management system includes at least one battery monitoring unit, and the plurality of sampling units are electrically connected to the battery monitoring unit.

[0025] Therefore, by performing multi-point sampling and aggregating the data of multiple sampling units into the battery monitoring unit, centralized monitoring and management of the entire battery device status can be achieved, providing a more comprehensive and accurate battery device health status assessment, and enhancing the reliability and stability of the battery device.

[0026] In some embodiments, the battery management system further includes a battery management unit and a connector, and the battery monitoring unit, the battery management unit and the connector are all disposed on the bearing surface of the second cover.

[0027] Thus, the various parts of the battery management system are integrated into the second cover, which can simplify the wiring, make the battery management system structure more compact, and improve the space utilization of the battery device. After integration, the battery management system is more centralized, making the installation process easier and also facilitating daily inspection and maintenance work.

[0028] In some embodiments, the battery management system further includes a battery management unit and a connector, and the battery monitoring unit, the battery management unit and the connector are all arranged on a surface of the first cover body along the first direction toward the side where the second cover body is located.

[0029] Thus, the various parts of the battery management system are integrated into the first cover, which can simplify the wiring, make the battery management system structure more compact, and improve the space utilization of the battery device. After integration, the battery management system is more centralized, making the installation process easier and also facilitating daily inspection and maintenance.

[0030] In some embodiments, a sealing layer is provided between the first flange and the flange portion, and / or a sealing layer is provided between the flange portion and the second flange, and the sealing layer cooperates with the flange portion to form a sealing interface, and the width of the sealing interface is 3-5 mm.

[0031] Since the sealing interface width is 3-5mm, it can improve the waterproof and dustproof ability and sealing performance of the box, reduce the damage of adverse environmental factors to internal electronic components, and make the battery device better adapt to various working environments, thereby improving the reliability and stability of the battery device.

[0032] In some embodiments, the cover assembly includes a third cover, the box includes a bottom plate and side plates, the bottom plate and the plurality of side plates are combined to form a third accommodating cavity, the third accommodating cavity accommodates the battery cell, the third cover and the box seal the third accommodating cavity, and the sampling assembly is disposed on the third cover.

[0033] Since the sampling device is arranged on the third cover, the sampling module can also be well adapted to the structure of the battery module, so as to efficiently sample the battery module and meet the needs of flexible expansion in different scenarios. While simplifying the sampling component and module structure, it also improves the accuracy and real-time performance of data collection, further enhancing the overall performance of the battery device.

[0034] In some embodiments, the sampling assembly includes a plurality of sampling units, each of the sampling units is disposed corresponding to each of the battery cells, and the sampling unit includes at least one sampling module, and the sampling module is detachably connected to the third cover.

[0035] Since each sampling unit is set corresponding to each battery cell, the sampling module can be set corresponding to the battery cell, which is conducive to independent sampling and accurate monitoring of the status (such as voltage, temperature, etc.) of each battery cell, and improves the accuracy and timeliness of sampling. In addition, the sampling module and the third cover body are connected in a detachable manner, so that when a sampling module needs to be repaired or replaced, there is no need to disassemble the entire module and sampling assembly as a whole, which reduces maintenance time and maintenance costs and improves the reliability of the battery device.

[0036] A second aspect of the embodiments of the present application provides an electrical device, comprising the battery device described in the first aspect of the embodiments of the present application, wherein the battery device is used to store or provide electrical energy.

[0037] Since the electrical device includes the battery device described in the first aspect of the embodiment of the present application, the assembly efficiency and space utilization of the electrical device can be improved.

[0038] Through the present application, the sampling assembly and the cover assembly can be integrated to sample the battery cell, so that the internal layout of the battery device is more compact and the assembly efficiency and sealing of the battery device are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings: Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application; Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application; Figure 3 A three-dimensional exploded schematic diagram of a battery device provided in some embodiments of the present application; Figure 4 for Figure 2 Sectional view at AA in the middle; Figure 5 A perspective exploded schematic diagram of a cover assembly provided for some embodiments of the present application; Figure 6 A perspective exploded schematic diagram of a cover assembly provided in some other embodiments of the present application; Figure 7 A schematic diagram of the structure of a sampling module provided in some embodiments of the present application; Figure 8 A partial cross-sectional schematic diagram of a first sampling module provided for some embodiments of the present application; Fig. 9A partial cross-sectional schematic diagram of a second sampling module provided in some embodiments of the present application; Fig.10 A schematic diagram of the structure of a second cover provided in some embodiments of the present application; Fig.11 A schematic structural diagram of a third cover body provided for some embodiments of the present application.

[0040] Description of Reference Numerals 1. Battery cell; 10. First cover; 11. First flange; 20. Second cover; 21. Flange; 22. Sealing layer; 23. First mounting through hole; 30. Third cover; 40. Sampling assembly; 41. Sampling unit; 42. Bracket; 43. Second mounting through hole; 50, sampling module; 50A, first sampling module; 50B, second sampling module; 51, cylinder; 52, sampling layer; 53, first flange; 54, second flange; 55, temperature sampling assembly; 56, voltage sampling assembly; 60. Battery management system; 61. Battery monitoring unit; 62. Battery management unit; 63. Connector; 100, battery device; 101, battery box; 102, cover assembly; 103, box body; 104, second flange; 105, bottom plate; 106, side plate; 200, controller; 300, motor; 1000, vehicle; S1, first accommodating chamber; S2, second accommodating chamber; S3, third accommodating chamber. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this document and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0049] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0050] Below, this application is described in detail.

[0051] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0052] In many application scenarios, new energy batteries are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are increasingly used in the field of energy storage. In new energy vehicles equipped with batteries, batteries can be used to provide power in whole or in part. In the field of energy storage, batteries can be installed in energy storage boxes or directly on the user side. With the continuous increase in demand for batteries, the industry's requirements for the assembly efficiency of battery devices are also constantly increasing. Therefore, how to improve the assembly efficiency of battery devices is one of the research and development topics in the industry.

[0053] After research and design, the sampling component and the cover component of the battery device are integrated, so that they can be processed as a whole during the processing, eliminating the steps of separate positioning and assembly, and improving the assembly efficiency of the battery device.

[0054] Based on such a design concept, the present application designs a battery device, which includes a battery box and a battery cell. The battery box includes a cover assembly and a box body. The battery box defines a accommodating cavity, and the battery cell is accommodated in the accommodating cavity. The cover assembly cooperates with the box body to close the accommodating cavity. The cover assembly is provided with a sampling assembly, and the sampling assembly is in contact with the battery cell for sampling the battery cell. The cover assembly includes a first cover body and a second cover body. The first cover body and the box body cooperate to close the accommodating cavity. The second cover body is arranged between the first cover body and the box body along a first direction, and the first direction is the thickness direction of the second cover body; a first flange is arranged at the edge of the first cover body, a second flange is arranged at the edge of the box body, and a flange portion is arranged at the edge of the second cover body, and the first flange, the flange portion and the second flange are connected to each other.

[0055] Therefore, by integrating the sampling assembly with the cover assembly, not only can the overall structural design of the battery device be simplified, but also the internal structure of the battery device can be made more compact. Through the integrated design, the space inside the battery device is fully utilized, so that the internal layout of the battery device is more compact, and the overall structure of the battery device is simplified. In addition, the setting of the first flange and the second flange can improve the structural strength of the edge of the box, reduce the risk of external impact vibration damaging the internal components of the box, and improve the stability of the box. At the same time, the first flange and the second flange are also conducive to mutual connection, and the cooperation with the flange part can also improve the connection strength and sealing of the box. During the processing, the first cover body, the second cover body and the sampling assembly can be pre-assembled, and then the cover assembly and the box body are connected in cooperation, which reduces the process of separate assembly, improves the assembly efficiency of the battery device, and facilitates the disassembly and replacement of the sampling assembly during maintenance.

[0056] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as a vehicle 1000 as an example for description. The following is a description with reference to the accompanying drawings.

[0057] Figure 1 The schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0058] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0060] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0061] Although not shown in the figure, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0062] In some embodiments, the electrode assembly is provided with tabs (not shown), which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0063] In some embodiments, the electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0064] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0065] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0066] In some embodiments, the housing includes a shell and an end cap, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0067] In some embodiments, the housing may be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing plays a role in protecting the electrode assembly, and a sealed bag is also included between the housing and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0068] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through a current collecting member. The electrode terminal may be disposed on an end cap, or may be disposed on the housing.

[0069] The emissions from the battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the isolation membrane, high-temperature and high-pressure gas generated by the reaction, flames, etc.

[0070] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0071] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0072] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0073] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0074] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0075] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0076] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0077] 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 cross beam and longitudinal beam of the vehicle.

[0078] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0079] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, 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.

[0080] Below, refer to Figures 2 to 11 Some embodiments of the present application are described in detail.

[0081] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application; Figure 3 A three-dimensional exploded schematic diagram of a battery device provided in some embodiments of the present application; Figure 4 for Figure 2 Sectional view at AA in the middle; Figure 5 A perspective exploded schematic diagram of a cover assembly provided for some embodiments of the present application; Figure 6 A perspective exploded schematic diagram of a cover assembly provided in some other embodiments of the present application; Figure 7 A schematic diagram of the structure of a sampling module provided in some embodiments of the present application; Figure 8 A partial cross-sectional schematic diagram of a first sampling module provided for some embodiments of the present application; Fig. 9 A partial cross-sectional schematic diagram of a second sampling module provided in some embodiments of the present application; Fig.10 A schematic diagram of the structure of a second cover provided in some embodiments of the present application; Fig.11 A schematic structural diagram of a third cover body provided for some embodiments of the present application.

[0082] In some embodiments of the present application, for the convenience of explanation, a first direction, a second direction and a third direction are set, and the directions of the first direction, the second direction and the third direction are directions that intersect each other, and here, intersecting each other includes perpendicularly intersecting each other. For the convenience of understanding the embodiments of the present application, in the embodiments shown in Figures 3 to 11, the first direction, the second direction and the third direction are directions that intersect each other perpendicularly for explanation, but those skilled in the art should understand that the embodiments of the present application are not limited to the situation where the three directions intersect each other perpendicularly. For the convenience of explanation, as shown by the arrows in Figures 2 to 9, the direction where the arrow Z is located is the first direction, the direction where the arrow X is located is the second direction, and the direction where the arrow Y is located is the third direction. Sometimes the direction indicated by the arrow Z along the first direction is also referred to as "above", and the opposite direction thereof is referred to as "below".

[0083] A first aspect of an embodiment of the present application provides a battery device 100. In the embodiment of the present application, the battery device 100 includes a battery box 101 and a battery cell 1. The battery box 101 includes a cover assembly 102 and a box body 103. The battery box 101 defines a receiving cavity. The battery cell 1 is received in the receiving cavity. The cover assembly 102 cooperates with the box body 103 to close the receiving cavity. The cover assembly 102 is provided with a sampling assembly 40. The sampling assembly 40 is in contact with the battery cell 1 and is used to sample the battery cell 1. The component 102 includes a first cover body 10 and a second cover body 20. The first cover body 10 and the box body 103 cooperate to close the accommodating cavity. The second cover body 20 is arranged between the first cover body 10 and the box body 103 along a first direction Z, and the first direction Z is the thickness direction of the second cover body 20; a first flange 11 is arranged at the edge of the first cover body 10, a second flange 104 is arranged at the edge of the box body 103, and a flange portion 21 is arranged at the edge of the second cover body 20. The first flange 11, the flange portion 21 and the second flange 104 are connected to each other.

[0084] Optionally, the battery box 101 may include a cover assembly 102 and a box body 103. The cover assembly 102 and the box body 103 are buckled together to form a closed space inside the battery box 101 to accommodate the battery cells 1. The closed space here means covering or closing, which may be sealed or unsealed.

[0085] Optionally, the battery box 101 may be in various shapes, such as a cylinder, a cuboid, etc.

[0086] Optionally, the box body 103 may be formed in a generally flat plate shape, or in a tray shape having side walls and a bottom wall, which is not particularly limited in the embodiment of the present application.

[0087] Optionally, the material of the box 103 may be alloy materials such as aluminum alloy, iron alloy, etc., or polymer materials such as polycarbonate, polyisocyanurate foam plastic, etc., or composite materials such as glass fiber and epoxy resin, etc. This embodiment of the application does not limit this.

[0088] The sampling component 40 is a component for monitoring the working state of the battery, and can improve the reliability of the battery device 100. Optionally, the sampling component 40 can collect voltage information, current information, temperature information, etc. of the battery cell 1 to detect whether there is an abnormality in the voltage, current, temperature, etc. of the battery.

[0089] Optionally, the above-mentioned current may include input and output currents, and the above-mentioned voltage may include input and output voltages.

[0090] Optionally, the sampling assembly 40 and the battery cell 1 may be contacted for sampling by welding, or by non-welding methods such as bonding, abutting, etc.

[0091] Therefore, by integrating the sampling assembly 40 with the cover assembly 102, not only can the overall structural design of the battery device 100 be simplified, but also the internal structure of the battery device 100 can be made more compact. Through the integrated design, the space inside the battery device 100 is fully utilized, making the internal layout of the battery device 100 more compact and simplifying the overall structure of the battery device 100. During the production and processing process, the sampling assembly 40 can be synchronously supplied with the cover assembly 102. The process of separate assembly is reduced, the assembly efficiency of the battery device 100 is improved, and it is also convenient to disassemble and replace the sampling assembly 40 during maintenance.

[0092] It can be understood that the first direction Z is the thickness direction of the second cover body 20 , and is also the thickness direction of the first cover body 10 .

[0093] In a specific embodiment, Figure 2 , Figure 3 As shown, the first direction Z may be an up-down direction.

[0094] For example, Figure 4 As shown, along the first direction Z, the second cover 20 is disposed between the first cover 10 and the box 103 .

[0095] Exemplarily, the first cover 10 and the box 103 together form a battery box 101 . The structure of the battery box 101 is substantially a rectangular body. The first cover 10 and the box 103 are in contact with the external environment of the battery device 100 .

[0096] For example, Figure 4 As shown, the first cover body 10 is provided with a convex portion protruding along the first direction Z direction away from the side where the second cover body 20 is located, and the second cover body 20 is a plate-shaped structure.

[0097] Optionally, the first cover 10 and the second cover 20 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and may be made of materials with high strength and strong impact resistance. The materials of the first cover 10 and the second cover 20 may be the same or different.

[0098] Exemplarily, the first cover body 10 can be made of metal, such as galvanized steel plate, and the surface is subjected to anti-corrosion treatment, including but not limited to powder spraying process, electrophoresis process, etc., and the surface spraying material is mainly epoxy resin powder or paint.

[0099] As another example, the first cover 10 may also be made of a composite material, such as glass fiber reinforced plastic, ie, SMC material and phase change material, ie, PCM material, etc. Other materials are not listed here.

[0100] Exemplarily, the second cover body 20 may be made of one of mold steel, composite materials, and engineering plastics.

[0101] It is understandable that the second cover 20 has a certain structural strength. Unlike a circuit board, the second cover 20 can be assembled with the first cover 10 and the box 103 .

[0102] Optionally, the first cover body 10 and the second cover body 20 may be independent components, or the first cover body 10 and the second cover body 20 may be an integrally connected structure.

[0103] In a specific embodiment, the box 103 can be made of sheet metal stamping or extruded aluminum profile. The former usually uses galvanized steel plate and completes bolt hole processing through a stamping process; the latter mostly uses 6 series aluminum material, which is welded and then processed accordingly.

[0104] Optionally, the inner and outer surfaces of the box body 103 may be subjected to surface anti-corrosion treatment, including but not limited to a powder spraying process, an electrophoresis process, etc., and the surface spraying material is mainly epoxy resin powder or paint.

[0105] In a specific embodiment, an insulating coating may be provided on the inner surface of the box body 103 to improve the insulation capability of the box body 103 .

[0106] In a specific embodiment, the explosion-proof valve of the battery cell 1 can be arranged at the bottom or the top. For example, if the explosion-proof valve of the battery cell 1 is arranged at the bottom, an explosion-proof valve avoidance hole can be opened at the corresponding position of the bottom of the box 103 to reduce the risk of thermal runaway.

[0107] Exemplarily, the first cover 10, the second cover 20 and the box 103 have a high-precision assembly dimension chain. In order to further reduce the production cost of the factory assembly line and improve the maintainability of the sampling assembly 40, the first cover 10 and the second cover 20 can be integrated from the process end.

[0108] For example, Figure 4 , Fig.10 As shown, the non-edge portion of the first cover body 10 protrudes away from the side where the second cover body 20 is located along the first direction Z, the second cover body 20 is a plate-like structure, the first flange 11 is connected to the flange portion 21, and a first accommodating cavity S1 is defined between the first cover body 10 and the second cover body 20. The flange portion 21 is connected to the second flange 104, and the second cover body 20 and the box body 103 define a second accommodating cavity S2.

[0109] Exemplarily, the first flange 11 and the flange 21 can be fixed by bolts. The flange 21 and the second flange 104 can also be fixed by bolts. By connecting the first flange 11, the flange 21 and the second flange 104 to each other, an effective sealing layer 22 can be formed between these components.

[0110] For example, during assembly, the first cover body 10 and the second cover body 20 may be pre-assembled through the first flange 11 and the flange portion 21 , and then assembled with the box body 103 .

[0111] Thus, the arrangement of the first flange 11 and the second flange 104 can improve the structural strength of the edge of the box 103, reduce the risk of external impact vibration damaging the internal components of the box 103, and improve the stability of the box 103. At the same time, the cooperation of the first flange 11, the second flange 104 and the flange 21 can also improve the locking strength and sealing of the box 103, and also facilitate subsequent disassembly and maintenance. During the processing, the first cover 10, the second cover 20 and the sampling assembly 40 can be pre-assembled, and then the cover assembly 102 and the box 103 are connected in parallel. The parallel pre-assembly reduces the process of separate assembly and serial assembly of each component, improves the assembly efficiency of the battery device 100, and also facilitates the disassembly and replacement of the sampling assembly 40 during maintenance.

[0112] In the embodiments of the present application, Figure 4 As shown, the sampling assembly 40 is detachably connected to the second cover body 20 .

[0113] Thus, the sampling assembly 40 and the second cover 20 are detachably connected, which can meet various sampling requirements and adapt to multiple scenarios, such as the requirements of temporarily adding sampling or quickly replacing the sampling assembly 40 during maintenance, thereby improving the layout flexibility and maintenance efficiency of the sampling assembly 40. In addition, during production and processing, the sampling assembly 40 can be pre-integrated with the cover assembly 102 and integrated from the process end, thereby improving the assembly efficiency of the battery box 101.

[0114] In an embodiment of the present application, a first accommodating chamber S1 is defined between the first cover body 10 and the second cover body 20, and the first accommodating chamber S1 accommodates a battery management system 60; a second accommodating chamber S2 is defined between the box body 103 and the second cover body 20, and the second accommodating chamber S2 accommodates a battery cell 1; and the sampling assembly 40 is electrically connected to the battery management system 60.

[0115] The battery management system 60, hereinafter referred to as BMS, is an electronic system specially designed to monitor and manage rechargeable batteries to ensure that the batteries operate within a safe operating range. It protects the battery from overcharging, over-discharging and other potential damages by real-time monitoring of parameters such as voltage, current and temperature, and ensures the consistency between battery cells 1 through balancing technology, thereby extending the battery life. BMS is also responsible for calculating the battery's state of charge (SOC), state of health (SOH) and state of power (SOP), providing users with key information and supporting efficient energy management and optimized use. In addition, BMS has fault diagnosis capabilities, can provide timely warnings and take measures to avoid safety accidents, and is an indispensable part of applications such as electric vehicles and energy storage systems. By communicating with external systems, BMS can also achieve remote monitoring and data analysis, further improving the intelligence level of battery management.

[0116] In a specific embodiment, Figure 4 As shown, a second accommodating chamber S2 is defined between the box body 103 and the second cover body 20 , and the second accommodating chamber S2 accommodates the battery cell 1 . The sampling assembly 40 is conductively connected to the battery management system 60 .

[0117] Optionally, the sampling assembly 40 may be conductively connected to the battery management system 60 through a wiring harness, a connection terminal, etc. This embodiment of the present application does not limit this.

[0118] In the embodiment of the present application, the cover assembly 102 includes a first cover 10 and a second cover 20, and a first accommodation cavity S1 is defined between the first cover 10 and the second cover 20. It can be understood that the first cover 10 and the second cover 20 at least partially overlap along the first direction Z.

[0119] Optionally, the first cover 10 is provided with a cavity, the second cover 20 is a plate-shaped structure, the first cover 10 is connected to the second cover 20, and the battery management system 60 is disposed in the first accommodating cavity S1 defined by the first cover 10 and the second cover 20. Optionally, the second cover 20 is provided with a cavity, the first cover 10 is a plate-shaped structure, the first cover 10 is connected to the second cover 20, and the battery management system 60 is disposed in the first accommodating cavity S1 defined by the first cover 10 and the second cover 20.

[0120] Since the first housing cavity S1 is defined between the first cover 10 and the second cover 20, and the first housing cavity S1 houses the battery management system 60, the battery management system 60 can utilize the cavity space of the cover assembly 102 without occupying the second housing cavity S2 where the battery cell 1 is arranged, which is beneficial to improving the space utilization of the battery device 100 and further improving the capacity of the battery device 100. In addition, during the production and processing process, the battery management system 60 can be synchronously supplied with the cover assembly 102. The separate assembly process is reduced, and the assembly efficiency of the battery device 100 is improved.

[0121] Furthermore, since the second cover body 20 is arranged between the first cover body 10 and the box body 103, physical isolation is performed between the battery management system 60 and the battery cell 1, and the space inside the box is separated, so that the two are in different accommodation spaces, which not only makes full use of the space inside the box, but also reduces the risk of short circuit or arc generation in the high-voltage parts of the two.

[0122] In the embodiment of the present application, the sampling assembly 40 includes a plurality of sampling units 41 , each sampling unit 41 is disposed corresponding to each battery cell 1 , and the sampling unit 41 includes at least one sampling module 50 , and the sampling module 50 is detachably connected to the second cover 20 .

[0123] Optionally, each sampling unit 41 may have only a single sampling module 50 for collecting one or more of the information such as voltage, power, current, temperature, etc. Each sampling unit 41 may also have multiple sampling modules 50 for collecting one or more of the information such as voltage, power, current, temperature, etc.

[0124] For example, Figure 3 , Figure 5 As shown, some sampling units 41 are not shown in the figure. The sampling component 40 includes a plurality of sampling units 41 , and each sampling unit 41 is arranged corresponding to each battery cell 1 .

[0125] Optionally, the sampling module 50 is detachably connected to the second cover body 20 , including but not limited to threaded connection, snap connection, magnetic connection and the like.

[0126] For example, Figure 3 As shown, the battery cells 1 may be arranged along the second direction X, that is, the large surfaces of the battery cells 1 are perpendicular to the second direction X.

[0127] As another example, in an embodiment not shown in the figure, the battery cells 1 may be arranged along the third direction Y, that is, the large surface of the battery cells 1 is perpendicular to the third direction Y.

[0128] It is understandable that the sampling unit 41 is arranged corresponding to the battery cell 1, and the position of the sampling unit 41 will be adjusted accordingly as the arrangement of the battery cell 1 changes, and is not limited to the specific embodiment shown in the figure. This improves the design flexibility, allowing the sampling assembly 40 to adapt to different battery cell 1 layout and configuration requirements.

[0129] Since each sampling unit 41 is arranged corresponding to each battery cell 1, the sampling module 50 can be arranged corresponding to the battery cell 1, which is conducive to independent sampling and accurate monitoring of the state (such as voltage, temperature, etc.) of each battery cell 1, and improves the accuracy and timeliness of sampling. In addition, the sampling module 50 and the second cover body 20 are connected in a detachable manner, so that when a sampling module 50 needs to be repaired or replaced, it is not necessary to disassemble the entire sampling assembly 40 as a whole, which reduces maintenance time and maintenance costs and improves the reliability of the battery device 100.

[0130] In an embodiment of the present application, the sampling module 50 includes a barrel 51 extending along a first direction Z, and the second cover body 20 is provided with a first mounting hole 23, and the barrel 51 can pass through the first mounting hole 23; a sampling layer 52 is provided at one end of the barrel 51, and a first flange 53 is provided at the other end, and the sampling layer 52 is in contact with the battery cell 1, and along the first direction Z, the first flange 53 abuts against the side of the second cover body 20 away from the battery cell 1 along the first direction Z.

[0131] In a specific embodiment, Figure 7 As shown, the sampling module 50 includes a cylinder 51 extending along a first direction Z, a sampling layer 52 is disposed at one end of the cylinder 51, and a first flange 53 is disposed at the other end.

[0132] Optionally, the first flange 53 may be an integral structure with the cylinder 51 , or may be detachably connected to the cylinder 51 , including but not limited to threaded connection, snap-fit ​​connection, interference fit and the like.

[0133] For example, Figure 4 , Figure 5 As shown, the second cover 20 defines a first mounting hole 23, and the barrel 51 can pass through the first mounting hole 23. Along the first direction Z, the first flange 53 abuts against a side of the second cover 20 away from the battery cell 1 along the first direction Z.

[0134] It is understandable that the sampling layer 52 may be a layered structure, and may have a built-in sensor or a body having the function of conducting information, such as conducting heat and electricity.

[0135] Optionally, the sampling layer 52 may be in contact with the housing or electrode terminals of the battery cell 1 .

[0136] Alternatively, the sampling layer 52 may be fixed at the contact position with the battery cell 1 by methods such as bonding, abutting and pressing.

[0137] Optionally, the material of the cylinder 51 may be engineering plastics such as polybutylene terephthalate, acrylonitrile-butadiene-styrene copolymer and polyamide.

[0138] Optionally, the materials of the first flange 53 and the barrel 51 may be the same or different.

[0139] Since the sampling layer 52 and the battery cell 1 are sampled by contact, the sampling module 50 improves the accuracy and timeliness of sampling, and is also convenient for separating and replacing the sampling module 50 during maintenance, thereby improving maintenance efficiency. In addition, the first flange 53 abuts against the second cover 20, which is conducive to sealing the first installation through hole 23 and separating the first accommodating chamber S1 from the second accommodating chamber S2. The abutting method is also conducive to the installation and removal of the sampling assembly 40.

[0140] In the embodiment of the present application, the sampling module 50 further includes a second flange 54 detachably connected to the barrel 51 ; the second cover 20 is located between the first flange 53 and the second flange 54 along the first direction Z, and the second flange 54 abuts against the second cover 20 .

[0141] Optionally, the second flange 54 is detachably connected to the cylinder 51 , including but not limited to threaded connection, snap connection, interference fit and the like.

[0142] Optionally, the second flange 54 and the barrel 51 may be made of the same material or different materials.

[0143] Alternatively, the material of the second flange 54 and the first flange 53 may be the same or different.

[0144] For example, Figure 4 As shown, the second cover 20 is located between the first flange 53 and the second flange 54 along the first direction Z, and the second flange 54 abuts against the second cover 20. Under vibration, mechanical shock, and expansion force conditions, the risk of the sampling module 50 and the second cover 20 being loosened is reduced.

[0145] Since the second cover body 20 is located between the first flange 53 and the second flange 54 along the first direction Z, the first flange 53 and the second flange 54 can abut the second cover body 20 from both sides of the first direction Z, thereby improving the stability of the sampling module 50 after installation. The detachable cooperation between the two is also conducive to disassembly, thereby improving maintenance efficiency.

[0146] In the embodiments of the present application, Figure 3 , Figure 4 , Figure 5As shown, the sampling unit 41 further includes a bracket 42 , the bracket 42 is provided with a second mounting through hole 43 , the cylinder 51 passes through the second mounting through hole 43 , and the bracket 42 is fixedly connected to the second cover body 20 .

[0147] Optionally, the material of the bracket 42 may be the same as or different from that of the second cover body 20 , which is not limited in the embodiment of the present application.

[0148] Optionally, the bracket 42 may be provided with one or more second mounting through holes 43. It is understandable that the number of the second mounting through holes 43 is the same as the number of the sampling modules 50.

[0149] For example, Figure 5 , Figure 6 As shown, the sampling unit 41 has two sampling modules 50 , and the bracket 42 defines two second mounting through holes 43 .

[0150] As another example, Fig.11 As shown, each bracket 42 may also be provided with a second mounting through hole 43 (not shown) to be fixed with a sampling module 50 .

[0151] Optionally, the bracket 42 may be made of any one of mold steel, composite material or engineering plastic.

[0152] In a specific embodiment, the second cover 20 is provided with a plurality of first mounting through holes 23, and the process end connects the sampling module 50, the bracket 42 and the second cover 20 by fastening, and the fasteners can use plastic rivets. The bracket 42 can be made of mold steel, composite material or engineering plastic. Under vibration, mechanical shock and expansion force conditions, the risk of the bracket 42 and the second cover 20 being loosened is reduced.

[0153] Thus, the bracket 42 can provide a stable support for the sampling module 50, and cooperate with the first flange 53 and the second flange 54 to abut the second cover 20, thereby improving the stability of the sampling module 50 after installation. Since the bracket 42 is fixedly connected to the second cover 20, the risk of the sampling module 50 falling off due to external vibration and impact is reduced, and the stability of the battery device 100 is further improved.

[0154] In the embodiment of the present application, the sampling module 50 includes a first sampling module 50A, the first sampling module 50A includes a temperature sampling component 55 disposed in a cylinder 51, the sampling layer 52 includes a heat conductive layer, and the temperature sampling component 55 contacts the heat conductive layer.

[0155] For example, Figure 4 , Figure 8 As shown, a temperature sampling component 55 is disposed in the barrel 51 of the first sampling module 50A, and the heat conductive layer can be in contact with the temperature sampling component 55 and the battery cell 1 to collect temperature information.

[0156] Exemplarily, the temperature sampling component 55 may be in direct contact with the heat conductive layer.

[0157] As another example, the cylinder 51 may be filled with a medium, such as epoxy resin, etc., to cover the temperature sampling component 55, and the temperature sampling component 55 may be in indirect contact with the heat conductive layer.

[0158] Optionally, the temperature sampling component 55 may be a thermocouple, a thermistor, etc. This embodiment of the present application does not limit this.

[0159] Optionally, the first sampling module 50A may also integrate an information transmission component, such as a wire, etc. The temperature sampling component 55 may be connected to the wire to export the collected signal.

[0160] In a specific embodiment, the heat-conducting layer can be a heat-conducting foam layer, which is a sealed graphite plate in the form of a heat-resistant sponge core material, with a heat-conducting double-sided tape attached to the bottom, which can be bonded to the electrode terminal of the battery cell 1. The temperature sampling component 55 includes a negative temperature coefficient thermistor chip, which is encapsulated in glass using epoxy resin glue, and the chip leads are connected to the wires by spot welding.

[0161] Optionally, the first sampling module 50A may be in contact with the positive electrode or the negative electrode, which is not limited in the embodiment of the present application.

[0162] Optionally, each sampling unit 41 may include at least one first sampling module 50A.

[0163] As a result, the heat-conducting layer can efficiently conduct heat from the measured battery cell 1 to the temperature sampling assembly 55, reducing the temperature measurement error caused by poor contact or air gap, and is suitable for precise temperature control requirements under various complex working conditions, thereby improving the temperature sampling accuracy. In addition, while enhancing the heat conduction efficiency, the heat-conducting layer can also play a buffering and protective role to a certain extent, reducing the risk of collision between the battery cell 1 and the sampling module 50 when subjected to vibration shock, and further improving the stability of the sampling assembly 40.

[0164] In the embodiments of the present application, Fig. 9 As shown, the sampling module 50 includes a second sampling module 50B, which includes a voltage sampling component 56 disposed in the barrel 51. The voltage sampling component 56 is disposed in the barrel 51, and the sampling layer 52 includes a conductive layer, and the voltage sampling component 56 is conductively connected to the conductive layer.

[0165] Exemplarily, the conductive layer may be a layered structure formed of a conductive material, such as a conductive alloy layer. Optionally, the conductive alloy material may be aluminum or copper.

[0166] Exemplarily, a conductive double-sided tape is attached to the bottom of the conductive layer, which can be effectively bonded to the battery cell 1 .

[0167] Optionally, the second sampling module 50B may further include a wire, and the conductive layer and the wire are connected by spot welding. The wire and the conductive alloy may be made of the same material to improve welding quality.

[0168] Alternatively, in order to take into account both the waterproof and information transmission performance of the sampling package, the conductor is composed of an inner metal wire and an outer wire cortex. Taking a copper wire conductor as an example, the copper wire and the cortex are tightly combined, and the possibility of water vapor entering through the gap between the copper wire and the wire cortex is small.

[0169] Optionally, the second sampling module 50B may be in contact with the positive electrode or the negative electrode, which is not limited in the embodiment of the present application.

[0170] Exemplarily, the first sampling module 50A is in contact with the positive electrode to collect temperature information; the second sampling module 50B is in contact with the negative electrode to collect voltage information.

[0171] As another example, the second sampling module 50B is in contact with the positive electrode to collect voltage information, and the first sampling module 50A is in contact with the negative electrode to collect temperature information.

[0172] Optionally, each sampling unit 41 may include at least one second sampling module 50B.

[0173] For example, Figure 3 As shown, each sampling unit 41 may include a first sampling module 50A and a second sampling module 50B.

[0174] Therefore, by providing a conductive layer between the voltage sampling component 56 and the battery cell 1, good electrical contact can be provided for voltage sampling, thereby reducing voltage measurement errors caused by contact resistance or air gaps and improving voltage sampling accuracy.

[0175] In the embodiment of the present application, the battery management system 60 includes at least one battery monitoring unit 61 , and the plurality of sampling units 41 are electrically connected to the battery monitoring unit 61 .

[0176] The battery monitoring unit 61, hereinafter referred to as CSC, is a part of the battery management system 60, and is mainly used to monitor the voltage, temperature and other key parameters of a single battery cell 1 in real time. Through high-precision measurement and intelligent algorithms, the CSC, as a slave control unit, realizes functions such as voltage collection, voltage backup, battery balancing and temperature collection of the battery cell 1.

[0177] For example, Fig.10 As shown, the battery monitoring unit 61 may be installed on one side of the second cover 20 along the second direction X, and may be connected to a plurality of sampling units 41 (not shown) via a wiring harness.

[0178] Therefore, by performing multi-point sampling and aggregating the data of multiple sampling units 41 to the battery monitoring unit 61, centralized monitoring and management of the status of the entire battery device 100 can be achieved, providing a more comprehensive and accurate health status assessment of the battery device 100, and enhancing the reliability and stability of the battery device 100.

[0179] In the embodiments of the present application, Fig.10 As shown, the battery management system 60 further includes a battery management unit 62 and a connector 63 . The battery monitoring unit 61 , the battery management unit 62 and the connector 63 are all disposed on the bearing surface of the second cover 20 .

[0180] The battery management unit 62, hereinafter referred to as BMU, is the core component of the battery management system 60, responsible for real-time monitoring of key parameters such as voltage, current, temperature, etc. in the battery pack, and performing data processing and analysis to ensure the safe operation of the battery. The BMU collects information by communicating with the battery monitoring unit 61, performs state estimation such as SOC (state of charge) and SOH (state of health), and implements protection measures to prevent overcharging, over-discharging and other potential risks, thereby optimizing battery performance and extending service life. In addition, the BMU also bears the important responsibilities of fault diagnosis and data transmission to ensure the stability and reliability of the entire battery management system 60.

[0181] For example, Fig.10 As shown, the battery management unit 62 can be installed together with the battery monitoring unit 61 on one side of the second cover 20 along the second direction X, and can be connected to the connector 63 and the battery monitoring unit 61 through a wiring harness.

[0182] Optionally, the battery management unit 62 may be disposed at a position far away from the battery monitoring unit 61 , or may be disposed at a position close to the battery monitoring unit 61 .

[0183] Optionally, although not shown in the figure, the battery management unit 62 and the battery monitoring unit 61 can also be arranged on both sides of the third direction Y.

[0184] It is understandable that the second cover 20 has a certain strength and can absorb impact vibration energy to a certain extent, reducing its adverse effects on the battery management system 60. Optionally, the second cover 20 can be a structural member or a combination of multiple structures among mold steel plates, composite material plates, and engineering plastic plates, which can carry and integrate the battery management system 60, wiring harness, wiring harness board, etc., provide more effective mechanical support for the battery management system 60, and also facilitate the precise positioning of the sampling component.

[0185] Optionally, the battery management system 60 may be fixed to the second cover 20 using a fastening connection or structural adhesive. Under vibration, mechanical shock, and expansion force conditions, the connection strength meets the structural strength requirements, reducing the risk of the battery management system 60 being loosened.

[0186] In a specific embodiment, the flatness between each part of the battery management system 60 and the connection surface is less than 0.5 mm, which can improve the assembly flatness.

[0187] Thus, the various parts of the battery management system 60 are integrated into the second cover 20, which can simplify the wiring, make the battery management system 60 more compact, and improve the space utilization of the battery device 100. After integration, the battery management system 60 is more centralized, making the installation process easier and also facilitating daily inspection and maintenance.

[0188] In an embodiment of the present application, the battery management system 60 further includes a battery management unit 62 and a connector 63. The battery monitoring unit 61, the battery management unit 62 and the connector 63 are all arranged on the surface of the first cover body 10 along the first direction Z toward the side where the second cover body 20 is located.

[0189] For example, Figure 6 As shown, the battery management system 60 may also be integrated inside the first cover 10 and electrically connected to the sampling assembly 40 via a wiring harness.

[0190] Thus, the various parts of the battery management system 60 are integrated into the first cover 10, which can simplify the wiring, make the battery management system 60 more compact, and improve the space utilization of the battery device 100. After integration, the battery management system 60 is more centralized, making the installation process easier and also facilitating daily inspection and maintenance.

[0191] In an embodiment of the present application, a sealing layer 22 is arranged between the first flange 11 and the flange portion 21, and / or a sealing layer 22 is arranged between the flange portion 21 and the second flange 104, and the sealing layer 22 cooperates with the flange portion 21 to form a sealing interface, and the width of the sealing interface is 3-5 mm.

[0192] Optionally, the sealing layer 22 may be a sealing gasket or a sealing adhesive layer, which is not limited in the embodiment of the present application.

[0193] Optionally, the sealing gasket may be a sealing material that is resistant to high temperatures and aging, such as EPDM rubber or silicone rubber.

[0194] In a specific embodiment, Figure 4As shown, the first flange 11 and the flange 21, and the flange 21 and the second flange 104 are connected by bolts and bolt locking holes, and a sealing layer 22 is provided between the first flange 11 and the flange 21, and between the flange 21 and the second flange 104 to form a sealing interface. The sealing interface is connected with bolts to achieve a sealing level of IP67 or above inside the battery device 100.

[0195] It can be understood that after the first flange 11 is connected to the flange portion 21, the battery management system 60 is in the sealed first accommodating cavity S1. Similarly, after the flange portion 21 is connected to the second flange 104, the battery cell 1 is in the sealed second accommodating cavity S2. The battery management system 60 is completely isolated from the battery cell 1, reducing the risk of short circuit between the two.

[0196] Optionally, the width of the sealing interface can be 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, etc., and can be appropriately widened in special cases to ensure effective sealing. The sealing interface can be polished or coated to help ensure that the sealing layer 22 can withstand uniform and sufficient pressure during installation, thereby achieving a tight bonding effect.

[0197] Since the sealing interface width is within an appropriate range, the waterproof and dustproof capabilities and sealing performance of the box 103 can be improved, the damage to internal electronic components caused by adverse environmental factors can be reduced, and the battery device 100 can better adapt to various working environments, thereby improving the reliability and stability of the battery device 100.

[0198] In an embodiment of the present application, the cover assembly 102 includes a third cover 30, the box body 103 includes a bottom plate 105 and a side plate 106, the bottom plate 105 and multiple side plates 106 are enclosed to form a third accommodating chamber S3, the third accommodating chamber S3 accommodates the battery cell 1, the third cover body 30 and the box body 103 close the third accommodating chamber S3, and the sampling assembly 40 is arranged on the third cover body 30.

[0199] For example, Fig.11 As shown, the third accommodation cavity S3 can accommodate a battery module, and the battery module can be formed into an independent module by arranging and fixing a plurality of battery cells 1. As an example, the battery module can be formed by bundling a plurality of battery cells 1 with a cable tie.

[0200] For example, the third cover 30 may be the upper cover of the battery module, and the bottom plate 105 may be at least part of the box 103 , that is, the third cover 30 , the bottom plate 105 and the side plate 106 enclose a third accommodating chamber S3 to accommodate the battery module. The third cover 30 carries the sampling assembly 40 .

[0201] Optionally, the battery management system 60 may be disposed in the third cover 30 , or in other parts, such as in the second accommodation cavity S2 or in the first accommodation cavity S1 . This embodiment of the present application does not limit this.

[0202] Since the sampling device is disposed on the third cover 30, the sampling module 50 can also be well adapted to the structure of the battery module, thereby efficiently sampling the battery module and meeting the needs of flexible expansion in different scenarios. While simplifying the sampling component 40 and the module structure, the accuracy and real-time performance of data collection are also improved, further enhancing the overall performance of the battery device 100.

[0203] In the embodiments of the present application, Fig.11 As shown, the sampling assembly 40 includes a plurality of sampling units 41 , each sampling unit 41 is disposed corresponding to each battery cell 1 , and the sampling unit 41 includes at least one sampling module 50 , and the sampling module 50 is detachably connected to the third cover 30 .

[0204] Since each sampling unit 41 is arranged corresponding to each battery cell 1, the sampling module 50 can be arranged corresponding to the battery cell 1, which is conducive to independent sampling and accurate monitoring of the state (such as voltage, temperature, etc.) of each battery cell 1, and improves the accuracy and timeliness of sampling. In addition, the sampling module 50 and the third cover 30 are connected in a detachable manner, so that when a sampling module 50 needs to be repaired or replaced, there is no need to disassemble the entire module and sampling assembly 40 as a whole, which reduces maintenance time and maintenance costs and improves the reliability of the battery device 100.

[0205] A second aspect of the embodiments of the present application provides an electrical device. In the embodiments of the present application, the electrical device includes the battery device 100 of the first aspect of the embodiments of the present application. The battery device 100 is used to store or provide electrical energy.

[0206] For example, the electric device may be a vehicle 1000, such as Figure 1 As shown, a battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0207] Since the electrical device includes the battery device 100 according to the first aspect of the embodiment of the present application, the assembly efficiency and space utilization of the electrical device can be improved.

[0208] The specific scheme of the embodiment of the present application is described below in conjunction with the accompanying drawings.

[0209] The embodiment of the present application proposes a battery device 100 , which integrates a battery management system 60 and a sampling assembly 40 into a cover assembly 102 as an integrated material, thereby saving the production cost of the factory assembly line and realizing a maintainable design.

[0210] The sampling module 50 in the embodiment of the present application can effectively obtain the voltage and temperature information of the battery cell 1 through non-welding contact sampling; the sampling module 50 can be effectively fixed on the second cover 20 through the bracket 42 and the fastener. The BMS can be effectively bonded to the first cover 10 or the second cover 20 through structural adhesive or fasteners. The second cover 20 can be sealed with the first cover 10 and the box 103 by the fasteners and the sealing layer 22.

[0211] The cover assembly 102 in this embodiment can meet the battery voltage and temperature sampling requirements while achieving sealing and protection. When the sampling assembly 40 fails, the sampling module 50 can be quickly replaced to retain the battery cell 1.

[0212] In a specific embodiment, the box body 103 can be a sheet metal stamping box body 103 or an extruded aluminum profile box body 103. To meet the atmospheric corrosion resistance requirements, the sheet metal stamping box body 103 can be made of galvanized steel plate, and the bolt holes of the second flange 104 can be processed after stamping; the extruded aluminum profile box body 103 can be made of 6 series aluminum, and the bolt holes of the second flange 104 can be processed after welding. After the structural processing of the box body 103 is completed, the inner and outer surfaces of the box body 103 can be subjected to surface anti-corrosion treatment. In order to ensure the insulation between the battery cell 1 and the box body 103, an insulating coating can be sprayed on the inner surface of the bottom of the box body 103. To further reduce the risk of thermal runaway of the battery device 100, when using the inverted explosion-proof valve at the bottom of the battery cell 1, the explosion-proof valve avoidance hole can be processed at the bottom of the box body 103 using CNC or stamping technology in conjunction with the bottom explosion-proof valve, and the burr is less than 0.2mm.

[0213] In a specific embodiment, the sampling module 50 includes a wire, which plays a role in transmitting information, epoxy resin plays a role in encapsulation, and the cylinder 51 plays a role in fixing. The core of the first sampling module 50A is thermally conductive foam and NTC. The thermally conductive foam is a sealed graphite plate in the form of wrapping a heat-resistant sponge core material. A thermally conductive double-sided tape is attached to the bottom, which can be effectively bonded to the battery cell 1; the NTC chip is encapsulated in glass, and the chip leads are connected to the wires by spot welding; NTC sampling packaging uses epoxy resin glue. The core of the second sampling module 50B is a conductive alloy, and the conductive alloy material can be aluminum or copper; a conductive double-sided tape is attached to the bottom of the conductive layer, which can be effectively bonded to the battery cell 1; the conductive layer and the wire are connected by spot welding, and the materials of the wire and the conductive layer are kept synchronized to ensure the quality of the spot welding connection. Further, in order to take into account the waterproof and information transmission performance of the sampling package, the above-mentioned wire is composed of an internal metal wire and an external wire cortex. Taking the copper wire conductor as an example, the copper wire and the cortex are tightly combined, and the possibility of water vapor entering through the gap between the copper wire and the wire cortex is small.

[0214] In a specific embodiment, the first cover body 10 can be made of metal, generally galvanized steel plate, and the surface is treated for corrosion. The first cover body 10 can also be a composite material, generally SMC and PCM. The first cover body 10 is connected to the second cover body 20 and the bolt locking holes reserved on the edge of the box body 103 by bolts, and the connection interface cooperates with the sealing layer 22 to ensure that the inside of the battery device 100 meets the IP67 or higher sealing level. The second cover body 20 reserves an opening position, and the process end fastens the sampling module 50, the bracket 42 and the second cover body 20. Plastic rivets can be used as fasteners. The second cover body 20 and the bracket 42 can be made of mold steel, composite materials or engineering plastics.

[0215] In a specific embodiment, the battery management system 60 uses a distributed structure to separate the battery management unit 62 and the battery monitoring unit 61 into several PCB boards. The large surfaces of the BMU, CSC and connector 63 can be bonded to the inner surface of the first cover body 10 using structural adhesive, or they can be fixed to the second cover body 20 using fastening connections or structural adhesive. The structural strength of the first cover body 10 or the second cover body 20 is required to meet the load-bearing requirements. To further ensure the flatness of the assembly, the flatness of the BMU, CSC, connector 63 and the connection surface is required to be less than 0.5mm. The BMS can effectively achieve electrical connection with the sampling assembly 40 and the power supply system of the battery device 100 through the wiring harness.

[0216] In a specific embodiment, the battery management system 60 is accommodated in the first accommodating cavity S1 between the first cover body 10 and the second cover body 20, making full use of the protrusion of the first cover body 10 to reduce the space occupied by the box body 103, so that the second accommodating cavity S2 of the box body 103 can accommodate more battery cells 1, thereby improving the battery capacity and the space utilization rate in the box body 103.

[0217] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0218] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0219] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of protection requested in the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of protection requested.

Claims

1. A battery device, characterized in that: The battery device comprises a battery box and a battery cell, wherein the battery box comprises a cover assembly and a box body. The battery box defines a receiving cavity, the battery monomer is received in the receiving cavity, the cover assembly cooperates with the box body to close the receiving cavity, The cover assembly is provided with a sampling assembly, and the sampling assembly is in contact with the battery monomer and is used for sampling the battery monomer; The cover assembly comprises a first cover and a second cover, the first cover cooperates with the box to close the accommodating cavity, and the second cover is arranged between the first cover and the box along a first direction, and the first direction is a thickness direction of the second cover; A first flange is arranged at the edge of the first cover body, a second flange is arranged at the edge of the box body, a flange is arranged at the edge of the second cover body, and the first flange, the flange and the second flange are connected to each other.

2. The battery device according to claim 1, characterized in that: The sampling assembly is detachably connected to the second cover body.

3. The battery device according to claim 1, characterized in that: A first accommodating cavity is defined between the first cover body and the second cover body, and the first accommodating cavity accommodates a battery management system; A second accommodating cavity is defined between the box body and the second cover body, and the second accommodating cavity accommodates the battery monomer; The sampling component is electrically connected to the battery management system.

4. The battery device according to claim 3, characterized in that: The sampling assembly includes a plurality of sampling units, each of which is arranged corresponding to each of the battery cells. The sampling unit includes at least one sampling module, and the sampling module is detachably connected to the second cover.

5. The battery device according to claim 4, characterized in that: The sampling module comprises a cylinder extending along the first direction, the second cover is provided with a first mounting through hole, and the cylinder can pass through the first mounting through hole; A sampling layer is arranged at one end of the cylinder, and a first flange is arranged at the other end. The sampling layer contacts the battery cell. Along the first direction, the first flange abuts against a side of the second cover body away from the battery cell along the first direction.

6. The battery device according to claim 5, characterized in that: The sampling module also includes a second flange detachably connected to the barrel; the second cover is located between the first flange and the second flange along the first direction, and the second flange abuts against the second cover.

7. The battery device according to claim 5 or 6, characterized in that: The sampling unit further comprises a bracket, the bracket is provided with a second mounting through hole, the cylinder body passes through the second mounting through hole, and the bracket is fixedly connected to the second cover body.

8. The battery device according to claim 7, characterized in that: The sampling module includes a first sampling module, the first sampling module includes a temperature sampling component arranged in the barrel, the sampling layer includes a heat-conducting layer, and the temperature sampling component is in contact with the heat-conducting layer.

9. The battery device according to claim 7, characterized in that: The sampling module includes a second sampling module, the second sampling module includes a voltage sampling component disposed in the cylinder, the voltage sampling component is disposed in the cylinder, the sampling layer includes a conductive layer, and the voltage sampling component is conductively connected to the conductive layer.

10. The battery device according to claim 4, characterized in that: The battery management system includes at least one battery monitoring unit, and a plurality of sampling units are electrically connected to the battery monitoring unit.

11. The battery device according to claim 10, characterized in that: The battery management system further includes a battery management unit and a connector. The battery monitoring unit, the battery management unit and the connector are all arranged on the bearing surface of the second cover.

12. The battery device according to claim 10, characterized in that: The battery management system further includes a battery management unit and a connector. The battery monitoring unit, the battery management unit and the connector are all arranged on a surface of the first cover body along the first direction toward a side where the second cover body is located.

13. The battery device according to claim 1, characterized in that: A sealing layer is arranged between the first flange and the flange part, and / or a sealing layer is arranged between the flange part and the second flange, and the sealing layer cooperates with the flange part to form a sealing interface, and the width of the sealing interface is 3-5 mm.

14. The battery device according to claim 1, characterized in that: The cover assembly includes a third cover, the box includes a bottom plate and side plates, the bottom plate and the plurality of side plates are combined to form a third accommodating cavity, the third accommodating cavity accommodates the battery cell, the third cover and the box seal the third accommodating cavity, and the sampling assembly is disposed on the third cover.

15. The battery device according to claim 14, characterized in that: The sampling assembly includes a plurality of sampling units, each of which is arranged corresponding to each of the battery cells. The sampling unit includes at least one sampling module, and the sampling module is detachably connected to the third cover.

16. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 15, wherein the battery device is used to store or provide electrical energy.

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