Battery device and electric appliance

Abstract

The application provides a battery device and an electric equipment. The battery device comprises a box assembly and a battery cell. The box assembly has a containing cavity. The battery cell is arranged in the containing cavity. The box assembly comprises a first structural member, a second structural member and one or more connecting members. At least the first structural member has an electrophoretic layer. The electrophoretic layer constitutes an outer surface of the first structural member. The connecting member comprises a connecting body and a protruding part arranged on the connecting body. The connecting body connects the first structural member and the second structural member. The protruding part is arranged to be capable of damaging the electrophoretic layer, so that the first structural member and the second structural member form an equipotential. In the battery device and the electric equipment, the protruding part on the connecting member can damage the electrophoretic layer on the box structural member. Therefore, the equipotential connection between the two structural members of the box assembly can be achieved without electrophoretic shielding. This helps to reduce the manufacturing process difficulty and cost of the battery device.

Description

Technical Field

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

[0002] Some components of battery devices are designed to meet equipotential requirements. At the same time, these components may also need to have an electrophoretic layer formed on their outer surface to meet corrosion resistance requirements. In order to meet both equipotential and corrosion resistance requirements, related technologies have chosen to perform electrophoretic shielding during electrophoresis to form equipotential points on the components. This approach has problems such as complex processes and high costs. Utility Model Content

[0003] This application provides a battery device and electrical equipment that can reduce process difficulty and manufacturing cost while meeting the equipotential requirement.

[0004] A first aspect of this application provides a battery device, the battery device including a housing assembly and a battery cell, the housing assembly having a receiving cavity, the battery cell being disposed within the receiving cavity, the housing assembly including: a first structural member and a second structural member, wherein at least the first structural member has an electrophoretic layer, the electrophoretic layer forming the outer surface of the first structural member; and one or more connectors, the connectors including a connecting body and a protrusion disposed on the connecting body, the connecting body connecting the first structural member and the second structural member, the protrusion being abutting against the first structural member to disrupt the electrophoretic layer of the first structural member, so that the first structural member and the second structural member are at the same potential.

[0005] In the battery device of this application embodiment, the protrusion on the connector can disrupt the electrophoretic layer on the housing structure, thereby enabling equipotential bonding between the two structural components of the housing assembly without electrophoretic shielding. This helps reduce the manufacturing difficulty and cost of the battery device. Furthermore, the electrophoretic layer retains a high degree of integrity in this configuration, thus reducing the requirements for the corrosion resistance of the bare materials of the structural components, which further contributes to cost reduction from another perspective.

[0006] In some embodiments, at least one of the connectors further includes a sealing portion disposed on the connector body, the sealing portion enabling at least one of the first structural member and the second structural member to form a sealed connection with the connector body.

[0007] In this embodiment, a sealing portion is further provided on at least one connector, which can improve the sealing performance between the connecting body and the first structural member and / or the second structural member, thereby improving the sealing performance of the battery device.

[0008] In some embodiments, the first structural member includes a first housing, the second structural member includes a second housing, the first housing and the second housing surround to form the receiving cavity, and at least one of the connecting members is configured as a first connecting member, the first connecting member connecting the first housing and the second housing.

[0009] In this embodiment, the connector with protrusions is applied to the connection interface between the first housing and the second housing, which helps to reduce the manufacturing difficulty and cost of the first housing and the second housing.

[0010] In some embodiments, the first connector is located outside the receiving cavity, and the first connector includes a sealing portion that enables at least one of the first housing and the second housing to form a sealed connection with the connecting body.

[0011] In this embodiment, a sealing part is provided in the first connector, which helps to improve the sealing performance of the connection interface between the first box and the second box, reduces the possibility of moisture and other substances entering the box through the connection interface between the first box and the second box, and thus helps to improve the reliability of the battery device.

[0012] In some embodiments, at least one of the connectors is disposed within the receiving cavity.

[0013] In this embodiment, the connector is further used to connect the structural components inside the cavity, which helps to further reduce the manufacturing difficulty and cost of the housing assembly.

[0014] In some embodiments, the first structural member includes a mounting bracket for mounting an electrical component, the electrical component being at least electrically connected to the battery cell, the mounting bracket being located within the receiving cavity, and at least one of the connectors being configured as a second connector connecting the mounting bracket and the second structural member.

[0015] In this embodiment, the mounting bracket and the second structural component are connected by a second connector. This helps to enable the mounting bracket to be configured with an electrophoretic layer, thus improving the insulation performance of the mounting bracket. On the other hand, as mentioned above, it helps to reduce the difficulty and cost of the connection process, and also helps to reduce the material cost of the mounting bracket itself.

[0016] In some embodiments, the first structural member and the second structural member are stacked, and the connecting body includes a nut and a stud connected to the nut. The nut is located on the side of the first structural member away from the second structural member along the stacking direction, and the stud passes through the first structural member along the stacking direction and is connected to the second structural member. The protrusion is located on the side of the nut facing the first structural member.

[0017] In this embodiment, the connecting body is specifically configured as a screw-in structure. In this way, during the screwing process of the connecting body, the protrusion will come into contact and rub against the outer surface of the first structural member, which increases the success rate of the protrusion destroying the electrophoretic layer, thereby improving the reliability of the equipotential connection.

[0018] In some embodiments, at least one of the connectors includes a sealing portion disposed on the side of the nut facing the first structural member along the stacking direction.

[0019] In this embodiment, after the actual connection is completed, the sealing part will be able to fill the connection gap formed by the protrusion between the nut and the first structural member, reducing the possibility that impurities, moisture and other substances in the external environment will come into contact with the threads of the connecting body through the connection gap and enter the receiving cavity, thereby improving the sealing performance of the connection interface and thus improving the reliability of the battery device.

[0020] In some embodiments, the number of protrusions is multiple, and the multiple protrusions are distributed at intervals along the circumference of the nut.

[0021] In this embodiment, this arrangement helps to increase the contact area between the protrusion and the first structural member, thereby increasing the success rate of the protrusion in destroying the electrophoretic layer and improving the reliability of equipotential bonding. Furthermore, in the embodiment where the connector includes a sealing portion, this arrangement helps to provide more space for the sealing portion while improving the reliability of equipotential bonding, thus further enhancing the sealing performance.

[0022] In some embodiments, the connector includes a nut that is fixed to the second structural member, at least a portion of the nut being located between the first and second structural members along the stacking direction, and the stud being screwed into the nut.

[0023] In this embodiment, the connecting body is configured to be connected to the second structural member by a nut, and at least a portion of the nut is located between the first and second structural members. This helps to improve the convenience and stability of the connection between the first and second structural members.

[0024] A second aspect of this application provides an electrical device including the battery device described in the first aspect of this application.

[0025] The electrical device of this application embodiment has all the advantages of the battery device described in any of the above embodiments, and will not be repeated here. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the battery device according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the connection interface between the first structural component, the second structural component, and the connector in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the connector according to an embodiment of this application;

[0030] Figure 5 This is a structural schematic diagram of the connector from another perspective of an embodiment of this application;

[0031] Figure 6 This is an exploded perspective view of the housing assembly according to an embodiment of this application;

[0032] Figure 7 yes Figure 6 A magnified view of part A in the middle;

[0033] Figure 8 This is a schematic diagram of the internal structure of the housing assembly according to an embodiment of this application;

[0034] Figure 9 yes Figure 8 A magnified view of part B in the diagram.

[0035] Explanation of reference numerals in the attached figures

[0036] 1000, Vehicle; 100, Battery Unit; 1, Housing Assembly; 1a, Receiving Cavity; 11, First Structural Component; 12, Second Structural Component; 13, Connector; 13a, First Connector; 13b, Second Connector; 131, Connecting Body; 1311, Nut; 1312, Stud; 132, Protrusion; 133, Sealing Part; 134, Nut; 14, First Housing; 15, Second Housing; 16, Mounting Bracket; 2, Battery Cell; 200, Controller; 300, Motor. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0039] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0040] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0041] In the description of this application, the orientation or positional relationship of "stack direction" is based on the orientation or positional relationship shown in the accompanying drawings, wherein "stack direction" is the direction indicated by arrow L1 in the drawings. It should be understood that these orientation terms are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0045] Some components of battery devices are designed to meet equipotential requirements. At the same time, these components may also need to have an electrophoretic layer formed on their outer surface to meet corrosion resistance requirements. In order to meet both equipotential and corrosion resistance requirements, related technologies have chosen to perform electrophoretic shielding during electrophoresis to form equipotential points on the components.

[0046] Taking the battery pack housing as an example, the housing typically includes a top cover and a housing. In order to meet the requirements of corrosion resistance and equipotentiality, electrophoresis is usually performed at the contact points between the top cover and the housing. That is, during electrophoresis, masking paper is attached to the mounting holes of the parts. After electrophoresis, the masking paper is removed, so that this position will not be electrophoresed, thus achieving the requirement of equipotential conductivity.

[0047] This application points out that, in the aforementioned scheme, equipotential bonding typically requires manual application of masking paper to the corresponding positions on the workpiece. Generally, a workpiece will have at least two equipotential points, and some complex workpieces may have more, leading to a complex process and high costs for both the masking paper and labor. Furthermore, the application of the masking paper is highly dependent on the worker's technique; if it is applied crookedly, the equipotential bonding may not achieve the desired effect.

[0048] Furthermore, in order to meet the corrosion resistance requirements of the battery device, the corresponding parts need to meet the salt spray test requirements. However, after equipotential shielding, a large area of ​​the original sheet metal at the shielding location will be exposed, which means that using conventional sheet metal (such as non-galvanized sheet metal) may not be able to meet the basic salt spray test requirements (such as 96h neutral salt spray test). In this case, it is necessary to use sheet metal with high corrosion resistance, such as galvanized sheet metal, which will increase the cost.

[0049] To address the aforementioned problems, this application proposes a battery device according to an embodiment of the present application. The battery device of this embodiment includes a housing assembly and a battery cell. The housing assembly has a receiving cavity, and the battery cell is disposed within the receiving cavity. The housing assembly includes a first structural member, a second structural member, and one or more connecting members. At least the first structural member has an electrophoretic layer, which forms the outer surface of the first structural member. The connecting member includes a connecting body and a protrusion disposed on the connecting body. The connecting body connects the first structural member and the second structural member. The protrusion is abutting against the first structural member to disrupt the electrophoretic layer of the first structural member, thereby enabling the first structural member and the second structural member to form an equipotential.

[0050] In the battery device of this application embodiment, the protrusion on the connector can disrupt the electrophoretic layer on the housing structure, thereby enabling equipotential bonding between the two structural components of the housing assembly without electrophoretic shielding. This helps reduce the manufacturing difficulty and cost of the battery device. Furthermore, the electrophoretic layer retains a high degree of integrity in this configuration, thus reducing the requirements for the corrosion resistance of the bare materials of the structural components, which further contributes to cost reduction from another perspective.

[0051] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0052] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0053] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0054] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0055] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0056] In some implementations, the electrode assembly is a stacked structure.

[0057] For example, multiple positive and negative electrodes can be provided, and multiple positive and multiple negative electrodes can be stacked alternately.

[0058] For example, multiple positive electrode sheets can be provided, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0059] For example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0060] For example, multiple separators may be provided, each disposed between any adjacent positive or negative electrode plates.

[0061] For example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0062] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0063] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0064] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. Exemplarily, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly for encapsulating the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0065] For example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0066] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0067] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0068] The technical solutions described in the embodiments of this application are applicable to electrical devices that use battery devices. The electrical devices include the battery devices of any embodiment of this application, and the battery devices are used to provide electrical energy.

[0069] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0070] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0071] Reference Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0072] Reference Figures 2-9 The battery device 100 of this application embodiment includes a housing assembly 1 and a battery cell 2. The housing assembly 1 has a receiving cavity 1a, and the battery cell 2 is disposed in the receiving cavity 1a. The housing assembly 1 includes a first structural member 11, a second structural member 12, and one or more connectors 13. At least the first structural member 11 has an electrophoretic layer (not shown), which forms the outer surface of the first structural member 11. The connector 13 includes a connecting body 131 and a protrusion 132 disposed on the connecting body 131. The connecting body 131 connects the first structural member 11 and the second structural member 12. The protrusion 132 is disposed in abutment against the first structural member 11 to break the electrophoretic layer of the first structural member 11 so that the first structural member 11 and the second structural member 12 are at the same potential.

[0073] The specific structural form of the housing assembly 1 is not limited, as long as it can provide a cavity 1a for accommodating the battery cell 2.

[0074] It should be noted that the housing assembly 1 here includes not only structural components for enclosing and forming the receiving cavity 1a, but also structural components disposed within the receiving cavity 1a, such as expansion beams, tie plates, and supports (e.g., BMU supports).

[0075] Reference Figure 3 The housing assembly 1 includes a first structural member 11 and a second structural member 12. Here, the first structural member 11 and the second structural member 12 can be any two parts in the housing assembly 1 that need to form an equipotential. Exemplarily, at least one of the first structural member 11 and the second structural member 12 can be a structural member for enclosing and forming a receiving cavity 1a. Also exemplaryly, at least one of the first structural member 11 and the second structural member 12 can be a structural member disposed within the receiving cavity 1a. Still exemplaryly, one of the first structural member 11 and the second structural member 12 is a structural member for enclosing and forming a receiving cavity 1a, and the other of the first structural member 11 and the second structural member 12 is a structural member disposed within the receiving cavity 1a.

[0076] In this embodiment, at least the first structural member 11 has an electrophoretic layer, which forms the outer surface of the first structural member 11. Specifically, the electrophoretic layer refers to a layer structure formed by uniformly depositing charged coating particles on a metal surface using an external DC power supply to create an electric field. In this embodiment, the specific material of the electrophoretic layer is not limited, and those skilled in the art can customize it according to actual usage requirements.

[0077] It should be noted that both the first structural member 11 and the second structural member 12 may have an electrophoretic layer. Alternatively, only the first structural member 11 may have an electrophoretic layer, while the second structural member 12 may not have an electrophoretic layer.

[0078] It is understandable that the electrophoretic layer usually has good insulation properties. Therefore, when making equipotential connections, the electrophoretic layer needs to be removed. As mentioned above, in related technologies, the method of manually pasting masking paper is used to form equipotential points not covered by the electrophoretic layer. This process is complex and costly.

[0079] In this embodiment, reference is made to... Figures 3-5 The housing assembly 1 includes one or more connectors 13. Each connector 13 includes a connecting body 131 and a protrusion 132 disposed on the connecting body 131. The connecting body 131 connects a first structural member 11 and a second structural member 12. The protrusion 132 is configured to disrupt the electrophoretic layer so that the first structural member 11 and the second structural member 12 are at the same potential.

[0080] Here, the specific structural form of the connecting body 131 is not limited, and those skilled in the art can determine it specifically according to the specific connection requirements of the first structural member 11 and the second structural member 12. For example, the connecting body 131 is configured as a threaded component (e.g., bolt, screw, etc.), where one of the first structural member 11 and the second structural member 12 has a threaded hole, and the other has a through hole. The connecting body 131 passes through the through hole and is screwed into the threaded hole to fix the two together. Another example is that the connecting body 131 is configured as a riveting component, such as a rivet. Yet another example is that the connecting body 131 is configured as a snap-fit ​​structure, etc.

[0081] The specific structural form of the protrusion 132 is not limited, as long as it can disrupt the electrophoretic layer during connection. Here, disrupting the electrophoretic layer specifically means that the protrusion 132 can penetrate the electrophoretic layer and contact the metal layer inside the electrophoretic layer, thereby enabling charge transfer between the corresponding structural component and the connector 13.

[0082] For example, the protrusion 132 is configured as a spike-like structure protruding from the connecting body 131; for example, the protrusion 132 is configured as a blade-like structure protruding from the connecting body 131; and for example, the protrusion 132 is configured as a contact structure (e.g., a ball-shaped contact) protruding from the connecting body 131.

[0083] In this embodiment, during the actual connection process, after the protrusion 132 abuts against the first structural member 11, an interaction force is generated between the protrusion 132 and the electrophoretic layer, thereby destroying the position of the electrophoretic layer corresponding to the protrusion 132, and then the metal layer inside the electrophoretic layer comes into contact with the protrusion 132 to form charge transfer.

[0084] It should be noted that in this embodiment, the focus is mainly on establishing the charge transfer path between the first structural member 11 and the protrusion 132. However, in order to achieve equipotentiality between the first structural member 11 and the second structural member 12, it is also necessary to form charge transfer paths between the protrusion 132 and the connecting body 131, and between the connecting body 131 and the second structural member 12.

[0085] For example, the connecting body 131 and the protrusion 132 are configured as conductive structures and are electrically connected. For example, the connecting body 131 and the protrusion 132 can both be configured as metal parts, thereby forming a charge transfer path between the protrusion 132 and the connecting body 131.

[0086] For example, the connecting body 131 is in contact with the second structural member 12 to form a charge transfer path between them. More specifically, the connecting body 131 may be configured as a conductive structure (e.g., a metal part), and the connecting body 131 is in contact with the conductive part (e.g., a metal layer) of the second structural member 12, thereby realizing the formation of a charge transfer path between the connecting body 131 and the second structural member 12.

[0087] The specific implementation of the above charge transfer path can be found in the relevant technologies in this field. The relevant sections below will also provide specific implementation methods, which will not be repeated here.

[0088] It is understood that in this embodiment, the electrophoretic layer is damaged by contact with the protrusion 132 during the connection process. Therefore, the parts of the electrophoretic layer that do not contact the protrusion 132 can maintain good integrity. In other words, in this embodiment, the integrity of the electrophoretic layer can be maintained as much as possible while achieving equipotentiality. Therefore, the requirements for the corrosion resistance of the bare material of the structural component (the material located in the electrophoretic layer) can be reduced.

[0089] As mentioned above, at least the first structural member 11 is provided with an electrophoretic layer. Therefore, the connecting body 131 is provided with a protrusion 132 at least at a position corresponding to the first structural member 11, so that the protrusion 132 can at least destroy the electrophoretic layer of the first structural member 11. Of course, in some other embodiments, the second structural member 12 may also be provided with an electrophoretic layer. In this embodiment, the connecting body 131 may also be provided with a protrusion 132 at a position corresponding to the second structural member 12, so that the protrusion 132 can further abut against the second structural member 12 to destroy the electrophoretic layer of the second structural member 12. Alternatively, the connecting body 131 can form a charge transfer with the second structural member 12 in other ways, such as through an intermediate structure connected to the second structural member 12, without limitation.

[0090] It should be noted that multiple connection points can be provided between the first structural member 11 and the second structural member 12. Only a portion of these connection points can be connected using the aforementioned connector 13, while the other connection points can be connected using other connection structures (e.g., by connecting the main body 131 without the protrusion 132), thereby reducing costs.

[0091] In the battery device 100 of this application embodiment, the protrusion 132 on the connector 13 can disrupt the electrophoretic layer on the housing structure, thereby enabling equipotential bonding between the two structural components of the housing assembly 1 without electrophoretic shielding, which helps reduce the manufacturing process difficulty and cost of the battery device 100. Furthermore, the electrophoretic layer retains a high degree of integrity in this configuration, thus reducing the requirements for the corrosion resistance of the bare materials of the structural components, thereby contributing to cost reduction from another perspective.

[0092] In some embodiments, at least one connector 13 further includes a sealing portion 133 disposed on the connector body 131, the sealing portion 133 enabling at least one of the first structural member 11 and the second structural member 12 to form a sealed connection with the connector body 131.

[0093] Here, the specific structural form of the sealing part 133 can be determined by those skilled in the art based on the actual sealing requirements of the battery device 100, and there is no limitation thereto. For example, the sealing part 133 may include a sealing gasket made of materials such as rubber or silicone.

[0094] The specific location of the sealing part 133 can be determined by those skilled in the art based on the actual situation after connection. Relevant examples will be given in the following sections, and will not be repeated here.

[0095] It is understood that the protrusion 132 may cause a relatively large connection gap between the connecting body 131 and the first structural member 11 and / or the second structural member 12 after the connection is completed, which may lead to a decrease in the sealing performance of the battery device 100. Therefore, in this embodiment, a sealing part 133 is further provided on at least one connector 13, which can improve the sealing performance between the connecting body 131 and the first structural member 11 and / or the second structural member 12, thereby improving the sealing performance of the battery device 100.

[0096] In some embodiments, refer to Figure 6 and Figure 7 The first structural member 11 includes a first housing 14, the second structural member 12 includes a second housing 15, the first housing 14 and the second housing 15 surround to form a receiving cavity 1a, and at least one connector 13 is configured as a first connector 13a, which connects the first housing 14 and the second housing 15.

[0097] Here, the specific structural form of the first box 14 and the second box 15 is not limited, as long as they can be arranged to form the receiving cavity 1a.

[0098] For example, the first housing 14 and / or the second housing 15 are configured as sheet metal structures.

[0099] It should be noted that there may be multiple connection points between the first housing 14 and the second housing 15. Only some of these connection points may be connected using the first connector 13a, while the remaining connection points may be connected using other connection structures. For example, the remaining connection points may be connected using the connecting body 131 without the protrusion 132.

[0100] In this embodiment, the connector 13 with the protrusion 132 is applied to the connection interface between the first housing 14 and the second housing 15, which helps to reduce the manufacturing process difficulty and cost of the first housing 14 and the second housing 15.

[0101] In some embodiments, the first connector 13a is located outside the receiving cavity 1a, and the first connector 13a includes a sealing portion 133, which enables at least one of the first housing 14 and the second housing 15 to form a sealed connection with the connecting body 131.

[0102] It is understood that the sealing performance of the connection interface between the first housing 14 and the second housing 15 is directly related to the sealing performance of the receiving cavity 1a. Therefore, in this embodiment, a sealing part 133 is provided in the first connector 13a. This helps to improve the sealing performance of the connection interface between the first housing 14 and the second housing 15, and reduces the possibility of moisture and other substances entering the housing through the connection interface between the first housing 14 and the second housing 15. In turn, it helps to improve the reliability of the battery device 100.

[0103] In some embodiments, at least one connector 13 is disposed within the receiving cavity 1a.

[0104] As mentioned above, the first structural member 11 and / or the second structural member 12 may be structural members disposed within the receiving cavity 1a. In this embodiment, the connector 13 disposed within the receiving cavity 1a is specifically used for equipotential connection between such structural members.

[0105] In this embodiment, the connector 13 is further used to connect the structural components inside the cavity 1a, which helps to further reduce the manufacturing difficulty and cost of the housing assembly 1.

[0106] In some embodiments, refer to Figure 8 and Figure 9 The first structural member 11 includes a mounting bracket 16 for mounting electrical components, which are at least electrically connected to the battery cell 2. The mounting bracket 16 is located within the receiving cavity 1a. At least one connector 13 is configured as a second connector 13b, which connects the mounting bracket 16 and the second structural member 12.

[0107] Here, electrical components include, but are not limited to, battery management units (BMUs), integrated busbars (CCSs), and so on.

[0108] The specific structural form of the mounting bracket 16 can be determined according to the structural form of the electrical components to be installed, and will not be elaborated here.

[0109] It is understandable that since the connection interface corresponding to the second connector 13b is located inside the receiving cavity 1a, the second connector 13b may not be provided with a sealing part 133.

[0110] In this embodiment, the second structural member 12 corresponding to the mounting bracket 16 can be specifically determined according to actual usage requirements. Taking the box assembly 1 including the first box 14 and the second box 15 as an example, the second structural member 12 corresponding to the mounting bracket 16 can be the second box 15, or the second structural member 12 corresponding to the mounting bracket 16 can be other structural members disposed in the receiving cavity 1a, such as an expansion beam or other beam structure.

[0111] In this embodiment, the mounting bracket 16 and the second structural member 12 are connected by the second connector 13b. This helps to enable the mounting bracket 16 to be configured with an electrophoretic layer, thus improving the insulation performance of the mounting bracket 16. On the other hand, as mentioned above, it helps to reduce the difficulty and cost of the connection process, and also helps to reduce the material cost of the mounting bracket 16 itself.

[0112] In some embodiments, refer to Figure 3 The first structural component 11 and the second structural component 12 are stacked. The connecting body 131 includes a nut 1311 and a stud 1312 connected to the nut 1311. The nut 1311 is located on the side of the first structural component 11 away from the second structural component 12 along the stacking direction. The stud 1312 passes through the first structural component 11 and is connected to the second structural component 12 along the stacking direction. The protrusion 132 is provided on the side of the nut 1311 facing the first structural component 11.

[0113] In this embodiment, the specific shape of the protrusion 132 is not limited, as long as it can destroy the electrophoretic layer. As mentioned above, the protrusion 132 can be set as a spike-like structure (the tip faces the first structural member 11), a blade-like structure (the blade tip faces the first structural member 11), a spherical contact structure (the spherical surface faces the first structural member 11), etc.

[0114] In this embodiment, the connecting body 131 is specifically configured as a screw-in structure. Thus, during the screwing process of the connecting body 131, the protrusion 132 will come into contact and rub against the outer surface of the first structural member 11, increasing the success rate of the protrusion 132 in destroying the electrophoretic layer, thereby improving the reliability of the equipotential connection.

[0115] Of course, the structural form of the connector 13 is not limited to this. For example, as mentioned above, the connecting body 131 can also be a riveting structure, a snap-fit ​​structure, etc.

[0116] In some embodiments, refer to Figure 4 and Figure 5 At least one connector 13 includes a sealing portion 133, which is disposed on the side of the nut 1311 facing the first structural member 11 along the stacking direction.

[0117] For example, the sealing part 133 is configured as an elastic structure made of materials such as silicone or rubber. During the twisting of the connecting body 131, the sealing part 133 is deformed by the reaction force from the first structural member 11, thereby tightly fitting with the surface of the first structural member 11, so that a seal is formed between the first structural member 11 and the connecting body 131.

[0118] For example, the sealing portion 133 is configured to extend circumferentially along the nut 1311 to form a closed structure, thereby enabling the gap between the nut 1311 and the first structural member 11 to be completely filled around the circumference, thus improving the sealing performance.

[0119] In this embodiment, after the actual connection is completed, the sealing part 133 will be able to fill the connection gap formed by the protrusion 132 between the nut 1311 and the first structural member 11, reducing the possibility that impurities, moisture and other substances in the external environment will come into contact with the threads of the connecting body 131 through the connection gap and enter the receiving cavity 1a, thereby improving the sealing performance of the connection interface and improving the reliability of the battery device 100.

[0120] In some embodiments, refer to Figure 5 There are multiple protrusions 132, which are distributed at intervals along the circumference of the nut 1311.

[0121] For example, the geometric centers of the protrusions 132 are set to be located on the same reference circle, so that during the twisting process, the multiple protrusions 132 form annular destruction areas on the electrophoretic layer, thereby enabling the multiple protrusions 132 to simultaneously form charge transfer paths with the first structural member 11.

[0122] In this embodiment, this arrangement helps to increase the contact area between the protrusion 132 and the first structural member 11, thereby increasing the success rate of the protrusion 132 in destroying the electrophoretic layer and improving the reliability of equipotential bonding. Furthermore, in the embodiment where the connector 13 includes a sealing portion 133, this arrangement helps to provide more space for the sealing portion 133 while improving the reliability of equipotential bonding, thus further improving the sealing performance.

[0123] Of course, the arrangement of the protrusion 132 is not limited to this. In some other embodiments, the number of protrusions 132 may be one. In some other embodiments, the protrusion 132 may extend circumferentially along the nut 1311 to form a ring-shaped closed structure.

[0124] In some embodiments, the connector 13 includes a nut 134, which is fixed to the second structural member 12. At least a portion of the nut 134 is located between the first structural member 11 and the second structural member 12 along the stacking direction, and a stud 1312 is screwed into the nut 134.

[0125] For example, the nut 134 can be specifically configured as a rivet nut, and the specific fixing method between the rivet nut and the second structural member 12 can be referred to the relevant technology in this field, which will not be elaborated here. Of course, the nut 134 can also be configured as a press-fit nut, a weld nut, etc., and there is no limitation on this.

[0126] In this embodiment, for example, the protrusion 132 is configured to form a charge transfer path with the connecting body 131, the connecting body 131 is configured to form a charge transfer path with the nut 134, and the nut 134 is configured to form a charge transfer path with the second structural member 12. In this way, charge can be transferred through the transfer path of the first structural member 11-protrusion 132-connecting body 131-nut 134-second structural member 12, thereby achieving equipotential between the first structural member 11 and the second structural member 12.

[0127] In this embodiment, the connecting body 131 is configured to be connected to the second structural member 12 via a nut 134, and at least a portion of the nut 134 is located between the first structural member 11 and the second structural member 12. This helps to improve the convenience and stability of the connection between the first structural member 11 and the second structural member 12.

[0128] It should be noted that in embodiments where there is a sealing requirement at the connection interface between the first structural member 11 and the second structural member 12, for example, in embodiments where the first structural member 11 includes a first housing 14 and the second structural member 12 includes a second housing 15, a sealing structure can be provided between the first structural member 11 and the second structural member 12. The specific method of setting the sealing structure can refer to the relevant technology in this field, and will not be elaborated here.

[0129] It should also be noted that the fixing method between the connecting body 131 and the second structural member 12 is not limited to this. For example, in some embodiments, the second structural member 12 may have a threaded hole extending along the stacking direction, and the stud 1312 connecting the body 131 can be screwed into the threaded hole.

[0130] The battery device 100 in one or more of the above embodiments will be described in more detail below with reference to a specific embodiment.

[0131] Reference Figures 2-9 The embodiments of this application provide a battery device 100, including a housing assembly 1 and a battery cell 2. The housing assembly 1 has a receiving cavity 1a, and the battery cell 2 is disposed in the receiving cavity 1a.

[0132] The housing assembly 1 includes a first structural component 11, a second structural component 12, an equipotential bolt (connecting body 131), and a nut 134. The equipotential bolt (connecting body 131) is no different in appearance from a normal bolt, except that there is an equipotential contact (protrusion 132) on the bolt flange face (nut 1311).

[0133] The equipotential bonding bolt enables equipotential bonding between the first structural component 11 and the second structural component 12. The specific principle is as follows: First, during the tightening process of the bolt (connecting body 131), the bolt flange face (nut 1311) is pressed against the upper surface of the first structural component 11. Because the bolt flange face (nut 1311) has equipotential contacts (protrusions 132), the tightening process destroys the electrophoretic layer on the upper surface of the first structural component 11, allowing the equipotential contacts (protrusions 132) on the bolt (connecting body 131) to connect with the metal layer on the upper surface of the first structural component 11. The nut 134 is connected to the first structural component 11. The nut 134 can be of various types, such as a rivet nut, a press-fit nut, or a weld nut, as long as the threads have exposed metal. The charge transfer path is as follows: the charge is transferred from the first structural component 11 to the bolt (connecting body 131) through the equipotential contact (protrusion 132). The bolt (connecting body 131) and the nut 134 are threadedly connected, and charge transfer can be achieved between them. At the same time, since the nut 134 is installed on the second structural component 12, the charge will be transferred to the second structural component 12, so as to achieve equipotential between the first structural component 11 and the second structural component 12.

[0134] The aforementioned equipotential bolts can be applied to external connection interfaces. For example, the first structural member 11 includes a first housing 14, and the second structural member 12 includes a second housing 15. The first housing 14 and the second housing 15 enclose and form a receiving cavity 1a.

[0135] Furthermore, since the equipotential contact (protrusion 132) protrudes from the bolt flange face (nut 1311) and is not continuously distributed, considering the sealing requirements of the external interface, sealant (sealing part 133) is arranged on the bolt flange face (nut 1311). After the bolt (connecting body 131) is locked onto the first structural member 11, the sealant (sealing part 133) is in a compressed state, which can reduce the probability that moisture from the external interface enters the threaded area through the interface between the first structural member 11 and the bolt (connecting body 131) and then enters the battery device 100.

[0136] The aforementioned equipotential bonding bolts can also be applied to internal connection interfaces. For example, the first structural member 11 includes a mounting bracket 16 for mounting the BMU and / or CCS. In this case, sealant (sealing part 133) may not be provided on the equipotential bonding bolt (connection body 131).

[0137] Embodiments of this application also provide an electrical device that includes a battery device 100 as described in any of the above embodiments.

[0138] The electrical device of this application embodiment has all the advantages of the battery device 100 described in any of the above embodiments, and will not be repeated here.

[0139] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0140] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, The battery device includes a housing assembly and individual battery cells. The housing assembly has a receiving cavity, and the individual battery cells are disposed within the receiving cavity. The housing assembly includes: A first structural member and a second structural member, wherein at least the first structural member has an electrophoretic layer, the electrophoretic layer forming the outer surface of the first structural member; and One or more connectors, each connector including a connecting body and a protrusion disposed on the connecting body, the connecting body connecting the first structural member and the second structural member, the protrusion being disposed in abutment against the first structural member to disrupt the electrophoretic layer of the first structural member, so that the first structural member and the second structural member are at the same potential.

2. The battery device according to claim 1, characterized in that, At least one of the connectors further includes a sealing portion disposed on the connector body, the sealing portion enabling at least one of the first structural member and the second structural member to form a sealed connection with the connector body.

3. The battery device according to claim 1, characterized in that, The first structural member includes a first housing, the second structural member includes a second housing, the first housing and the second housing surround to form the receiving cavity, and at least one of the connecting members is configured as a first connecting member, the first connecting member connecting the first housing and the second housing.

4. The battery device according to claim 3, characterized in that, The first connector is located outside the receiving cavity, and the first connector includes a sealing portion that enables at least one of the first housing and the second housing to form a sealed connection with the connecting body.

5. The battery device according to claim 1, characterized in that, At least one of the connectors is disposed within the receiving cavity.

6. The battery device according to claim 5, characterized in that, The first structural member includes a mounting bracket for mounting electrical components, the electrical components being at least electrically connected to the battery cell, the mounting bracket being located within the receiving cavity, and at least one of the connecting members being configured as a second connecting member, the second connecting member connecting the mounting bracket and the second structural member.

7. The battery device according to any one of claims 1-6, characterized in that, The first structural component and the second structural component are stacked together. The connecting body includes a nut and a stud connected to the nut. The nut is located on the side of the first structural component away from the second structural component along the stacking direction. The stud passes through the first structural component along the stacking direction and is connected to the second structural component. The protrusion is located on the side of the nut facing the first structural component.

8. The battery device according to claim 7, characterized in that, At least one of the connectors includes a sealing portion disposed on the side of the nut facing the first structural member along the stacking direction.

9. The battery device according to claim 7, characterized in that, The number of protrusions is multiple, and the multiple protrusions are distributed at intervals along the circumference of the nut.

10. The battery device according to claim 7, characterized in that, The connector includes a nut, which is fixed to the second structural member. At least a portion of the nut is located between the first and second structural members along the stacking direction, and the stud is screwed into the nut.

11. An electrical appliance, characterized in that, The electrical equipment includes the battery device according to any one of claims 1-10.

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