Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The battery device comprises at least one battery monomer and a battery management system, the battery management system comprises a circuit board and a connector connected to the circuit board, the connector comprises a shell and a conductive terminal, the conductive terminal is arranged on the shell in a penetrating mode and provided with a joint section in contact connection with the shell, a bonding layer is arranged on the surface of the joint section, and the circuit board is connected with the circuit board. And the bonding layer is used for bonding the conductive terminal and the shell. According to the battery device, the bonding layer is arranged on the surface of the joint section of the conductive terminal, and the bonding layer can play a role in bonding the conductive terminal and the shell, so that the bonding force between the conductive terminal and the shell is improved, the conductive terminal and the shell are prevented from loosening, the reliability of the connector is improved, and the working reliability of the battery device is improved.

Description

Technical Field

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

[0002] With the rapid development of new energy, battery devices, as core components of electric vehicles, energy storage equipment, and other devices, directly determine the performance and safety of the entire system. Therefore, how to improve battery reliability is an urgent technical problem to be solved. Utility Model Content

[0003] In view of the above problems, this application provides a battery device and an electrical appliance, which aims to improve the reliability of the connector, thereby improving the reliability of the battery.

[0004] The first aspect of this application provides a battery device, including at least one battery cell and a battery management system. The battery management system includes a circuit board and a connector connected to the circuit board. The connector includes a housing and conductive terminals. The conductive terminals are disposed on the housing and have a joint section that contacts and connects with the housing. An adhesive layer is provided on the surface of the joint section for bonding the conductive terminals and the housing.

[0005] The battery device of this application embodiment provides an adhesive layer on the surface of the joint section of the conductive terminal. The adhesive layer can bond the conductive terminal and the housing, thereby improving the adhesion between the conductive terminal and the housing, preventing the conductive terminal from loosening from the housing, improving the reliability of the connector, and thus improving the working reliability of the battery.

[0006] In some embodiments, the housing includes a plastic housing, and the conductive terminals are configured to be soldered to a circuit board. During soldering of the conductive terminals to the circuit board, the adhesive layer softens under high temperature to embed itself into the pores of the plastic housing. In this embodiment, the adhesive layer disposed on the surface of the conductive terminals softens under high temperature and embeds itself into the pores of the plastic housing, creating an interlocking engagement between the conductive terminals and the plastic housing, thereby improving the adhesion between the plastic housing and the conductive terminals.

[0007] In some embodiments, the adhesive layer is made of polyetheretherketone (PEEK). PEEK softens under high temperatures and embeds itself into the pores of the housing under high-temperature expansion and cooling contraction stresses and interference stresses, thereby improving the adhesion between the housing and the surface of the conductive terminal.

[0008] In other embodiments, the adhesive layer is made of silicon dioxide. The adhesive layer in this embodiment is made of silicon dioxide, which, when applied to the surface of the conductive terminals, increases the surface roughness of the mating sections of the conductive terminals. Especially when the housing is a plastic housing, during the soldering of the conductive terminals to the circuit board, the adhesive layer on the conductive terminals is subjected to the high temperatures of soldering. Under these high temperatures, the carbon in the plastic housing and the silicon dioxide in the adhesive layer form chemical bonds (Si-OC), strengthening the interlocking stability of the contact surface between the plastic housing and the conductive terminals, and improving the bonding force.

[0009] In some embodiments, the surface of the mating section is further provided with a recess, and a portion of the housing is embedded in the recess. During assembly of the housing and conductive terminal, when the housing undergoes stress creep under interference stress or contraction stress, the creep of the housing fills the recess on the surface of the conductive terminal, forming an interlocking interface. This significantly improves the holding force between the housing and the conductive terminal, mitigating the problem of easy detachment between the conductive terminal and the housing. Simultaneously, the creep of the housing fills the recess on the conductive terminal, absorbing stress and preventing the housing from cracking.

[0010] In some embodiments, an adhesive layer is disposed over the recess. In this embodiment, the adhesive layer is disposed over the recess, thus forming a dual composite structure on the surface of the conductive terminal's mating section. This prevents the holding force from remaining at a high level even if the single structure fails during processing, further improving operational reliability.

[0011] In some embodiments, the cross-sectional shape of the recess includes at least one of a circle, a square, and a strip. The cross-sectional shape of the recess in this application embodiment includes at least one of a circle, a square, and a strip, thus allowing for the selection of a suitable recess based on the shape and / or area of ​​the contact segment of the conductive terminal.

[0012] In some embodiments, the recess includes a strip-shaped groove, and the conductive terminal includes a plurality of surface segments disposed in the circumferential direction. Each of the plurality of surface segments has a strip-shaped groove, and the strip-shaped grooves of adjacent surface segments are staggered. In this embodiment, the conductive terminal has strip-shaped grooves on multiple surface segments, and the strip-shaped grooves of adjacent surface segments are staggered. This ensures that strip-shaped grooves are provided at different heights and different positions in the circumferential direction of the joint segment, thereby improving the bonding force between the conductive terminal and the housing.

[0013] In some embodiments, the surface of the joint segment is provided with a plurality of recesses, which are spaced apart or intersecting. In this embodiment, the surface of the joint segment is provided with a plurality of recesses, which can be spaced apart or intersecting. By providing a plurality of recesses on the surface of the joint segment, the volume of the shell embedded in the recesses is increased. This improves the bonding force and prevents loosening. Furthermore, when the shell is subjected to stress and creeps, the creep can fill the recesses, thus absorbing stress and preventing the shell from cracking.

[0014] In some embodiments, the conductive terminal includes a plurality of surface segments disposed in the circumferential direction, at least one of the plurality of surface segments having a recess.

[0015] In some embodiments, the conductive terminals and the housing are assembled by interference riveting. In this embodiment, the conductive terminals and the plastic housing are assembled by interference riveting. Due to its plastic properties, the plastic housing undergoes plastic deformation under pressure, forming an interference fit with the conductive terminals, further improving the bonding force between the conductive terminals and the plastic housing.

[0016] In some embodiments, a tapered guide portion is provided at the axial end of the conductive terminal. The tapered surface of the tapered guide portion guides the insertion of the conductive terminal, improving the convenience of interference riveting assembly between the conductive terminal and the plastic housing.

[0017] A second aspect of this application provides an electrical device including the aforementioned battery, which is used to store or provide electrical energy.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application.

[0021] Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application.

[0022] Figure 3This is a schematic diagram of the connection structure between the battery management system and the battery cell in some embodiments of this application.

[0023] Figure 4 This is a three-dimensional structural schematic diagram of the connector according to some embodiments of this application.

[0024] Figure 5 This is an exploded structural diagram of the connector of some embodiments of this application.

[0025] Figure 6 This is a cross-sectional structural diagram of a connector according to some embodiments of this application.

[0026] Figure 7 This is a cross-sectional structural diagram of a connector according to some embodiments of this application.

[0027] Figure 8 yes Figure 7 A partially enlarged structural diagram of part B in the diagram.

[0028] Figure 9 This is a schematic diagram of the connection interface between the housing and conductive terminals of a connector according to some embodiments of this application.

[0029] Figure 10 This is a schematic diagram of the structure of a connector in some embodiments of this application where the conductive terminals are not provided with recesses.

[0030] Figure 11 This is a schematic diagram of the structure of a connector with recessed conductive terminals according to some embodiments of this application.

[0031] Figure 12 This is a schematic diagram of the structure of a connector with a recessed portion and an adhesive layer provided on the conductive terminals of some embodiments of this application.

[0032] Figure 13 This is a schematic diagram of the structure of conductive terminals in some embodiments of this application.

[0033] Figure 14 This is a schematic diagram of the structure of the conductive terminals in some other embodiments of this application.

[0034] Figure 15 This is a schematic diagram of the structure of the conductive terminal in some embodiments of this application.

[0035] Figure 16 This is a schematic diagram of the structure of conductive terminals in some embodiments of this application.

[0036] Figure 17 This is a schematic diagram of the structure of conductive terminals in some embodiments of this application.

[0037] Figure 18 This is a schematic diagram of the structure of conductive terminals in some embodiments of this application.

[0038] Figure 19 This is a schematic diagram of the structure of conductive terminals in some embodiments of this application.

[0039] Figure 20 This is a schematic diagram of the structure of conductive terminals in some embodiments of this application.

[0040] Figure 21 This is a schematic diagram of the structure of conductive terminals in some embodiments of this application.

[0041] Figure 22 This is a diagram showing the results of a simulation test of the bonding force between the conductive terminals and the housing in some embodiments of this application.

[0042] The accompanying drawings are not drawn to scale.

[0043] 2000, vehicles.

[0044] 1000. Battery device.

[0045] 200. Sub-boxes.

[0046] 100. Battery cell.

[0047] 10. Connector; 11. Housing; 12. Conductive terminal; 120. Engaging section; 121. Recess; 122. Adhesive layer; 1112. Connection interface; 121a. First groove; 121b. Second groove; 121c. Third groove; 123. Tapered guide.

[0048] 20. Wire connector.

[0049] 30. Circuit board; 32. Electronic components.

[0050] 40. Wiring harness.

[0051] 50. CAN hub.

[0052] 60. Cooling fan.

[0053] 70. Control module.

[0054] 90. Debugging module.

[0055] X, the first direction; Y, the second direction. Detailed Implementation

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0061] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0062] 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0063] Currently, judging from market trends, batteries are being used more extensively. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0064] In battery devices, connectors play a crucial role as a connecting bridge, linking the temperature, current, voltage, and corresponding control signals and currents between various modules and components. Therefore, the reliability of connectors directly affects the safety and reliability of the battery. Improving battery reliability is thus a pressing issue that needs to be addressed.

[0065] A connector consists of a housing and conductive terminals mounted on the housing. The bonding force between the conductive terminals and the housing is crucial to preventing them from coming loose. As connectors become increasingly miniaturized, the housing thickness is typically reduced, limiting the contact area between the housing and the conductive terminals. This results in a weaker holding force between the housing and the conductive terminals, making them more prone to coming loose.

[0066] To address the aforementioned technical issues, the applicant conducted in-depth research and proposed setting an adhesive layer on the surface of the joint between the conductive terminal and the housing. The adhesive layer bonds the conductive terminal and the housing, thereby enhancing the bonding force between the housing and the conductive terminal, improving the reliability of the connector, and ultimately improving the reliability of the battery device.

[0067] This application provides an electrical device including the aforementioned battery device, which is used to store or provide electrical energy. The electrical device can be an energy storage system, or various electrical devices that use the battery device as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0068] For ease of explanation, the following embodiments use a vehicle 2000 as an example of an electrical device from some embodiments of this application.

[0069] Figure 1 The vehicle 2000 is shown using a battery device 1000 as its power source.

[0070] refer to Figure 2 The battery device 1000 is disposed within the vehicle 2000 and includes at least one battery cell 100. A drive motor is disposed within the vehicle 2000, and the drive motor is electrically connected to the battery device 1000. The battery device 1000 provides electrical energy to the drive motor, which is connected to the wheels via a transmission mechanism to drive the vehicle. Specifically, the battery device 1000 may be horizontally disposed at the bottom of the vehicle 2000.

[0071] The battery device 1000 of this application embodiment includes at least one battery cell 100. Specifically, in this embodiment, as shown... Figure 2 As shown, the battery device 1000 of this embodiment includes a plurality of battery cells 100 and a housing for accommodating the plurality of battery cells 100. The housing has a receiving cavity, in which the plurality of battery cells 100 are arranged. Specifically, the housing in this embodiment is a box-shaped housing and includes two sub-boxes 200 for accommodating the battery cells 100. The two sub-boxes 200 are closed to form the receiving cavity. In other embodiments not shown in the figures, the housing may also be a frame-shaped housing, a disc-shaped housing, or other shapes. Moreover, the shapes of the two sub-boxes 200 may also be different, which is not limited here.

[0072] A single battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc. This application embodiment is not limited to this. Multiple battery cells are electrically connected via connecting tabs. Multiple battery cells connected by connecting tabs can be connected in series, in parallel, or in a mixed connection. A battery cell refers to the smallest unit constituting a battery device 1000. A battery cell includes a casing, electrode assemblies, and other functional components. The inner cavity of the casing is used to house the electrode assemblies. The electrode assemblies are the components in the battery cell where electrochemical reactions occur. The casing may contain one or more electrode assemblies. The electrode assemblies are mainly formed by winding or stacking positive and negative electrode sheets. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the terminals to form a current loop. The electrode assembly can be a wound structure or a stacked structure; this application embodiment is not limited to this.

[0073] In some embodiments of this application, reference is made to Figures 2 to 12This application provides a battery device including at least one battery cell 100 and a battery management system. The battery management system includes a circuit board 30 and a connector 10 connected to the circuit board 30. The connector 10 includes a housing 11 and conductive terminals 12. The conductive terminals 12 pass through the housing 11 and have a contacting section 120 that contacts and connects with the housing 11. An adhesive layer 122 is provided on the surface of the contacting section 120 for bonding the conductive terminals 12 and the housing 11.

[0074] refer to Figure 3 The battery device according to this application embodiment includes a battery cell 100. At least one battery cell 100 is electrically connected to a connector 10. For example, the battery cell 100 is connected to a wire end connector 20 via a wiring harness 40, and the wire end connector 20 is connected to the connector 10.

[0075] refer to Figure 4 Connector 10 is connected to circuit board 30 and is a board-end connector. Connector 10 can be soldered onto circuit board 30. Circuit board 30 includes a printed circuit board (PCB).

[0076] refer to Figures 4 to 6 The connector 10 of this embodiment includes a housing 11 and conductive terminals 12. The housing 11 is a cavity structure and includes a side wall that surrounds the housing in the circumferential direction, a bottom wall connected to the side wall, and an opening opposite to the bottom wall. The conductive terminals 12 are columnar structures and pass through the bottom wall, such that a portion of the conductive terminals 12 is located inside the cavity of the housing 11, and another portion protrudes outside the cavity of the housing 11.

[0077] refer to Figure 6 The conductive terminal 12 has a mating section 120 that contacts and mates with the housing 11. Specifically, the mating section 120 refers to the portion of the conductive terminal 12 that contacts and mates with the bottom wall of the housing 11. In other words, the area covered by the bottom wall of the housing 11 is the mating section 120 of the conductive terminal 12. Therefore, the thicker the bottom wall of the housing 11, the longer the length of the mating section 120. However, as mentioned above, the bottom wall of the housing 11 is usually made relatively thin, resulting in a very short mating section, which in turn limits the contact area between the housing and the conductive terminal.

[0078] To increase the bonding force between the housing 11 and the conductive terminal 12 with a smaller contact area, refer to Figure 12An adhesive layer 122 is provided on the surface of the mating section 120 of the conductive terminal 12. The adhesive layer 122 is used to bond the conductive terminal 12 and the housing 11. The adhesive layer 122 is formed by coating the surface of the conductive terminal 12 (e.g., by automatic brushing, automatic magnetic sputtering, electroplating, etc.). This adhesive layer 122 serves to bond the conductive terminal 12 and the housing 11. Especially when the conductive terminal 12 is soldered to the circuit board 30, the temperature at the end of the conductive terminal 12 rapidly increases and is conducted to the rest of the conductive terminal 12. At this time, the adhesive layer 122 on the mating section 120 of the conductive terminal 12 softens under the high temperature, further enhancing the adhesive force.

[0079] The battery in this application embodiment has an adhesive layer 122 provided on the surface of the joint section 120 of the conductive terminal 12. The adhesive layer 122 can bond the conductive terminal 12 and the housing 11, thereby improving the adhesion between the conductive terminal 12 and the housing 11, preventing the conductive terminal 12 from loosening from the housing 11, improving the reliability of the connector, and thus improving the working reliability of the battery.

[0080] In some embodiments, housing 11 includes a plastic housing. Conductive terminals 12 are configured to be soldered to circuit board 30. During soldering of the conductive terminals 12 to circuit board 30, adhesive layer 122 softens under high temperature to embed into pores within the plastic housing.

[0081] The housing 11 in this embodiment includes a plastic housing, which is insulating. Furthermore, the plastic housing has micropores due to its material properties. This embodiment utilizes this characteristic of the plastic housing; when the conductive terminal 12 is soldered to the circuit board 30, it is subjected to high temperatures, and the bonding section 120 is also subjected to high temperatures. The adhesive layer 122 on its surface softens under high temperatures and flows into the pores of the plastic housing, thereby forming an interlocking engagement between the conductive terminal 12 and the plastic housing, enhancing the adhesion between them.

[0082] Furthermore, the embodiments of this application not only utilize the characteristic that the plastic shell has pores, but also utilize the characteristic that the conductive terminals are subjected to high temperatures when soldering to the circuit board, thereby causing the adhesive layer to soften under high temperature and embed into the tiny pores of the plastic shell under the stress of high temperature expansion and cooling contraction and interference stress.

[0083] The adhesive layer 122 disposed on the surface of the conductive terminal 12 in this embodiment softens under high temperature and then embeds into the pores of the plastic shell, so that the conductive terminal 12 and the plastic shell form an interlocking engagement, thereby improving the adhesion between the plastic shell and the conductive terminal 12.

[0084] In some embodiments, the conductive terminal 12 is a metal conductor.

[0085] In some embodiments, the adhesive layer 122 is made of polyether ether ketone (PEEK). The adhesive layer 122 softens under high temperatures and embeds itself within the pores of the housing under high-temperature expansion and cooling contraction stresses and interference stresses, thereby enhancing the adhesion between the housing and the surface of the conductive terminal.

[0086] To further improve the bonding strength between the housing and the conductive terminals, in some embodiments, the adhesive layer 122 is made of silicon dioxide (SiO2). The adhesive layer 122 of this application embodiment, made of silicon dioxide, when applied to the surface of the conductive terminals, can increase the surface roughness of the mating sections of the conductive terminals.

[0087] Furthermore, the adhesive layer made of silica will embed into the gaps in the housing 11 under high temperature to form an adhesive effect.

[0088] In some embodiments, the housing 11 includes a plastic housing. When the conductive terminal 12 is soldered to the circuit board 30, the adhesive layer 122 disposed on the conductive terminal 12 is subjected to the high temperature of soldering. Under this high temperature, the carbon in the plastic housing and the silicon dioxide in the adhesive layer 122 form chemical bonds (Si-OC) at high temperature, which strengthens the stability interlock of the contact surface between the plastic housing and the conductive terminal and improves the bonding force.

[0089] refer to Figures 6 to 8 In some embodiments, the surface of the engagement section 120 is further provided with a recess 121. A portion of the housing 11 is embedded in the recess 121.

[0090] refer to Figure 11 , Figures 13 to 21 In some embodiments, the surface of the joint section 120 is provided with a recess 121, which can be a groove, pit, etc. This groove or pit can be formed by, but is not limited to, laser, cutting, or powder molding.

[0091] The housing 11 in this embodiment is a deformable housing, such as a plastic housing.

[0092] When assembling the housing 11 and the conductive terminal 12, if the housing 11 undergoes stress creep under interference stress or contraction stress, the creep will fill the recessed portion 121 on the surface of the conductive terminal 12, forming an interlocking interface. This greatly enhances the holding force between the housing 11 and the conductive terminal 12, improving the problem of the conductive terminal 12 easily detaching from the housing 11. Simultaneously, the creep of the housing fills the recessed portion 121 on the conductive terminal 12, absorbing stress and preventing the housing from cracking.

[0093] In some embodiments, the adhesive layer 122 and the recess 121 are respectively disposed at different positions on the surface of the conductive terminal 12. For example, the conductive terminal 12 includes multiple surface segments disposed at different positions in the circumferential direction. Some surface segments may be provided with recesses 121, while other surface segments may be provided with adhesive layers 122. Specifically, for example, the conductive terminal 12 is a square prism, which includes four surface segments located on different faces in the circumferential direction. In this case, one or more surface segments may only be provided with recesses 121, while another or two or more surface segments may only be provided with adhesive layers.

[0094] In other embodiments, an adhesive layer 122 is disposed over the recess 121. That is, the recess 121 and the adhesive layer 122 are sequentially disposed in the thickness direction of the surface of the conductive terminal 12, and the adhesive layer 122 is disposed over the recess 121.

[0095] The steps for forming the conductive terminal 12 in these embodiments are as follows: Figures 10 to 12 As shown, for reference Figure 10 First, provide several conductive terminals 12; refer to Figure 11 A recess 121 (e.g., a groove or pit) is provided on the surface of the conductive terminal. The recess 121 can be formed by processes such as laser cutting, machining, or powder molding. (See reference...) Figure 12 An adhesive layer 122 is then applied to the surface of the recess 121. The adhesive layer 122 can be applied by methods such as automatic brushing, automatic magnetic sputtering, or electroplating.

[0096] In this embodiment, the adhesive layer 122 is provided to cover the recess 121, thereby forming a double composite structure on the surface of the joint section of the conductive terminal 12. This prevents the holding force from remaining at a high level even if the single structure fails, thus further improving operational reliability.

[0097] In some embodiments, the cross-sectional shape of the recess 121 includes at least one of a circle, a square, and a strip.

[0098] refer to Figure 14 In some embodiments, the recess 121 includes a first groove 121a and a second groove 121b, wherein the second groove 121b is a strip-shaped groove and the width of the groove is smaller than the width of the first groove 121a, and the first groove 121a is approximately a square groove.

[0099] In some embodiments, the recess 121 includes a third groove 121c. (See reference...) Figure 16 The cross-sectional shape of the third groove 121c is square. (Reference) Figure 17 The cross-sectional shape of the third groove 121c is circular.

[0100] The cross-sectional shape of the recess 121 in this embodiment includes at least one of circular, square, and strip shapes, so that a suitable recess 121 can be selected according to the shape and / or area of ​​the joint section of the conductive terminal 12.

[0101] refer to Figure 15 In some embodiments, the recess 121 includes a strip-shaped groove. The conductive terminal 12 includes a plurality of surface segments disposed in the circumferential direction, each of which has a strip-shaped groove, and the strip-shaped grooves of adjacent surface segments are staggered.

[0102] refer to Figure 15 In some embodiments, the conductive terminal 12 is a square columnar structure and includes four surface segments. Each surface segment is provided with a strip-shaped groove, and the strip-shaped grooves of adjacent surface segments are staggered. For example, a first surface segment is provided with two strip-shaped grooves, and a second surface segment adjacent to the first surface segment is provided with one strip-shaped groove. The strip-shaped groove on the second surface segment is located between the two strip-shaped grooves on the first surface segment, forming a misalignment. This misalignment means that the strip-shaped grooves are in different positions in the axial direction of the conductive terminal 12.

[0103] In this embodiment, the conductive terminal 12 has strip-shaped grooves on multiple surface segments, and the strip-shaped grooves on adjacent surface segments are staggered. This ensures that strip-shaped grooves are provided at different heights and different positions in the circumferential direction of the joint segment, thereby improving the bonding force between the conductive terminal 12 and the housing 11.

[0104] refer to Figures 16 to 21 In some embodiments, the surface of the mating section 120 is provided with a plurality of recesses 121. The plurality of recesses 121 are spaced apart or are arranged in a cross pattern.

[0105] refer to Figure 16 and Figure 17 Multiple recesses 121 are spaced apart and evenly distributed on the surface of the joint section 120; Reference Figure 19 Multiple recesses 121 are intersectingly arranged on the surface of the mating section 120. (See reference) Figure 21 Multiple recesses 121 are sequentially connected on the surface of the joining section 120. This application does not limit the specific distribution of the recesses 121 in its embodiments.

[0106] The surface of the joint segment 120 mentioned here can be a surface segment of the joint segment 120. For example, if the joint segment 120 is a square column structure, then multiple recesses 121 can be provided on one surface of the square column structure, and the multiple recesses 121 can be spaced apart or intersected.

[0107] The surface of the joint section 120 in this embodiment of the application is provided with a plurality of recesses 121. The plurality of recesses 121 can be spaced apart or arranged crosswise. By providing a plurality of recesses 121 on the surface of the joint section 120, the volume of the shell embedded in the recesses 121 is increased. On the one hand, the bonding force can be improved to prevent loosening. On the other hand, when the shell is subjected to stress and creep occurs, the creep of the shell can be filled into the recesses, that is, it plays the role of absorbing stress and preventing the shell from cracking.

[0108] In some embodiments, the conductive terminal 12 includes a plurality of surface segments disposed in the circumferential direction. At least one of the plurality of surface segments is provided with a recess 121.

[0109] In some embodiments, in order to further improve the bonding force between the conductive terminal 12 and the plastic housing, the conductive terminal 12 and the plastic housing in this application embodiment are assembled by interference riveting. Due to its plastic properties, the plastic housing will undergo plastic deformation when subjected to pressure, and can form an interference fit with the conductive terminal 12.

[0110] The conductive terminal 12 is assembled with the plastic housing by interference riveting. Specifically, the plastic housing is provided with a mounting hole, the diameter of which is slightly smaller than the diameter of the conductive terminal 12. The difference between the two diameters is the interference amount. For example, the conductive terminal 12 can be pressed into the mounting hole under the action of a press, which causes the hole wall of the mounting hole to be stretched and deformed, thereby generating radial pressure between the hole wall of the mounting hole and the conductive terminal 12 to form an interference fit.

[0111] To improve the ease of interference riveting assembly between the conductive terminal 12 and the plastic housing, refer to Figure 16 In some embodiments of this application, the axial end of the conductive terminal 12 is provided with a tapered guide portion 123. When assembling the conductive terminal 12 and the plastic housing, the tapered guide portion 123 first enters the connection hole of the plastic housing. Therefore, the tapered surface of the tapered guide portion 123 guides the entry of the conductive terminal 12.

[0112] The following is based on Figures 2 to 22 The structure of a battery according to a specific embodiment of this application will be described in detail.

[0113] like Figure 2 As shown, the battery device 1000 of this embodiment includes a housing and at least one battery cell 100 disposed within the housing.

[0114] like Figure 3As shown, the battery device 1000 in this embodiment also includes a battery management system. The battery management system includes a circuit board 30 and a connector 10 connected to the circuit board 30. The battery device 1000 also includes a wire end connector 20, a wiring harness 40, and a CAN hub 50. The CAN (Controller Area Network) hub 50 is disposed between the wiring harness 40 and the battery cell 100. The end of the wiring harness 40 is connected to the wire end connector 20, which is electrically connected to the connector 10 on the circuit board 30. In this way, the status data of the battery cell 100 can be output to the circuit board 30 through the wire end connector 20 and the connector 10, thereby realizing the monitoring of the battery's operating status.

[0115] The circuit board 30 also has electronic components 32. The CAN hub 50 also has a debugging module 90, a cooling fan 60, and a control module 70.

[0116] In this embodiment, connector 10 is a board-end connector. Board-end connectors include, but are not limited to, pin header connectors and jack connectors.

[0117] like Figures 4 to 6 As shown, the connector 10 of this embodiment includes a housing 11 and a plurality of conductive terminals 12 disposed on the housing 11. Each conductive terminal 12 extends along a first direction X, and the plurality of conductive terminals 12 are spaced apart along a second direction Y. Figure 6 As shown, the conductive terminal 12 in this embodiment has a mating section 120 that contacts and engages with the bottom wall of the housing 11.

[0118] The conductive terminal 12 and the plastic housing 11 are assembled by interference riveting, and the conductive terminal 12 is clamped and fixed by the interference stress between the two. The plastic housing 11 also serves to insulate and isolate adjacent metal conductors.

[0119] like Figures 7 to 12 As shown, the surface of the bonding section 120 of the conductive terminal 12 in this embodiment is provided with a recess 121 and an adhesive layer 122. The adhesive layer 122 covers the surface of the recess 121 and is a SiO2 / PEEK nanocomposite coating (thickness 5-10μm).

[0120] In this embodiment, the housing 11 is a plastic housing.

[0121] In this embodiment, the joint section 120 of the conductive terminal 12 is provided with a recess 121 and an adhesive layer 122. Through the dual composite structure, the holding force can still be maintained at a high level even if the processing of a single structure fails. Moreover, by providing a recess on the surface of the joint section, local interference between the conductive terminal and the plastic housing is avoided, the problem of local interference cracking is improved, and the assembly yield is greatly improved.

[0122] refer to Figure 7 and Figure 8 When the plastic housing undergoes stress creep under assembly interference stress or shrinkage stress, the plastic creep fills the recesses (grooves, pits) on the conductive terminals, thus absorbing stress and preventing the plastic from cracking. Simultaneously, it references... Figure 9 Due to the creep and extrusion flow of the plastic shell material, an interlocking interface 1122 is formed in the recess, which greatly improves the holding force between the plastic shell and the conductive terminal and improves the problem of the conductive terminal 12 falling off the plastic shell.

[0123] Furthermore, the SiO2 / PEEK coating on the surface of the conductive terminal 12 softens under high temperature during soldering with the circuit board 30. Under the stresses of high-temperature expansion and contraction during cooling, as well as interference stress, it embeds itself into the micropores of the plastic shell interface, forming an interlocking engagement with the plastic shell surface and enhancing the adhesion between the plastic shell and the surface of the conductive terminal 12. Moreover, the carbon in the plastic shell forms chemical bonds (Si-OC) with the SiO2 on the surface of the metal conductor at high temperature, strengthening the stability and interlocking of the contact interface and increasing the interaction force.

[0124] like Figures 10 to 12 A recessed portion 121 (i.e., groove or pit structure) is provided on the conductive terminal 12, and an adhesive layer 122 is provided. This groove or pit structure can be, but is not limited to, laser, cutting, or powder forming. This adhesive layer 122 is a composite high-temperature adhesive layer, and includes, but is not limited to, a PEEK & SiO2 composite nano coating. This composite high-temperature adhesive coating can be, but is not limited to, coating methods such as automatic brushing, automatic magnetic sputtering, or electroplating.

[0125] like Figures 16 to 21 The recessed portion 121 can be a square recess, a circular recess, or other irregular recess structures. The groove structure includes, but is not limited to, intersecting, misaligned, and screw-shaped structures.

[0126] The conductive terminal 12 in this embodiment includes, but is not limited to, square, strip, circular, elliptical, and flat conductors.

[0127] like Figures 13 to 15 As shown, the recessed portion 121 in this embodiment can be provided on one, two, three, or four sides of the conductive terminal 12. The width and number of the recessed portion 121 can be adjusted according to actual needs.

[0128] Similarly, the composite high-temperature adhesive layer can also be arranged on one, two, three, or four sides of the conductive terminal 12.

[0129] like Figure 22As shown, simulation tests were conducted on the holding force of connectors with conductive terminals without grooves, connectors with conductive terminals with protrusions, connectors with conductive terminals only with grooves, connectors with conductive terminals only with composite adhesive layers, and connectors with conductive terminals having both grooves and composite adhesive layers. During the test, the wave soldering or reflow soldering temperatures were simulated. After high temperature, the best holding force between the plastic shell and the conductive terminal was achieved by using a groove and high-temperature composite coating scheme. Furthermore, after high temperature, the holding force of a groove alone was better than that of a protrusion structure alone.

[0130] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include At least one battery cell (100). and The battery management system includes: Circuit board (30); and Connector (10), connected to the circuit board (30), includes: Shell (11): and A conductive terminal (12) is disposed on the housing (11), and the conductive terminal (12) has a joint section (120) that is in contact with the housing (11). An adhesive layer (122) is provided on the surface of the joint section (120) for bonding the conductive terminal (12) and the housing (11).

2. The battery device according to claim 1, characterized in that, The housing (11) includes a plastic housing, and the conductive terminal (12) is configured to be soldered to the circuit board (30). When the conductive terminal (12) is soldered to the circuit board (30), the adhesive layer (122) softens under high temperature to embed into the pores of the plastic housing.

3. The battery device according to claim 1, characterized in that, The adhesive layer (122) is made of polyetheretherketone; or, the adhesive layer (122) is made of silicon dioxide.

4. The battery device according to any one of claims 1 to 3, characterized in that, The surface of the joint section (120) is also provided with a recess (121), and a portion of the housing (11) is embedded in the recess (121).

5. The battery device according to claim 4, characterized in that, The adhesive layer (122) is disposed over the recess (121).

6. The battery device according to claim 4, characterized in that, The cross-sectional shape of the recess (121) includes at least one of circular, square, and strip shapes.

7. The battery device according to claim 6, characterized in that, The recess (121) includes a strip groove, and the conductive terminal (12) includes a plurality of surface segments arranged in the circumferential direction. The plurality of surface segments are provided with the strip groove, and the strip grooves of adjacent surface segments are staggered.

8. The battery device according to claim 4, characterized in that, The surface of the joint section (120) is provided with a plurality of recesses (121), which are spaced apart or intersected.

9. The battery device according to claim 4, characterized in that, The conductive terminal (12) includes a plurality of surface segments disposed in the circumferential direction, at least one of the plurality of surface segments being provided with the recess (121).

10. The battery device according to claim 4, characterized in that, The conductive terminal (12) and the housing (11) are assembled by interference riveting.

11. The battery device according to claim 10, characterized in that, The conductive terminal (12) has a tapered guide portion (123) at its axial end.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 11, the battery device being used to store or provide electrical energy.

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