Battery device and electric appliance

Abstract

The application relates to a battery device and an electric device. The battery device comprises a box body with a containing cavity, a plurality of battery monomers arranged in the containing cavity, a separation component arranged on one side of the battery monomers with electrode terminals, and a busbar arranged on the separation component and connected with the electrode terminals. One of the separation component and the busbar is provided with a receiving part, and the other is provided with a protruding part matched with the receiving part. The plug-in structure formed by the protruding part and the receiving part can inhibit the transverse movement of the busbar relative to the separation component, reduce the probability of the welding position deviation of the busbar relative to the separation component, and make the busbar stably arranged at the welding position of the separation component during the transportation and transfer process. The busbar can be stably and accurately welded with the electrode terminals at the welding position, so that the welding quality between the busbar and the electrode terminals of the battery monomers is improved, and the production yield of the battery device is improved.

Description

Technical Field

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

[0002] The battery device includes multiple battery cells and a busbar (also called a bus or a battery pack). The electrode terminals of two adjacent battery cells are welded to the busbar to achieve electrical connection between the battery cells.

[0003] In related technologies, before the busbar is welded to the electrode terminals of the battery cell, the busbar is prone to misalignment relative to the welding position, resulting in low welding quality between the busbar and the electrode terminals of the battery cell, which reduces the production yield of the battery device. Utility Model Content

[0004] This application aims to at least solve the problem in the related art that the busbar of the battery device is prone to misalignment relative to the welding position before welding the electrode terminals of the battery cell, resulting in low welding quality between the busbar and the electrode terminals of the battery cell and reducing the production yield of the battery device. This application provides a battery device and an electrical device.

[0005] In a first aspect, this application provides a battery device, comprising:

[0006] The box-shaped enclosure has a receiving cavity;

[0007] Multiple battery cells are disposed in the receiving cavity;

[0008] The battery cell includes an isolation component and a busbar, wherein the isolation component is disposed on the side of the battery cell having electrode terminals, and the busbar is placed on the isolation component and connected to the electrode terminals;

[0009] The isolation member and the busbar are provided with a receiving part, and the other is provided with a protrusion that is inserted and engaged with the receiving part.

[0010] The battery device according to the first aspect of this application has at least the following beneficial effects:

[0011] In the battery device of this application, when the battery cell, the separator, and the busbar are assembled, the receiving portion or protrusion on the separator provides mounting positioning for the busbar. When the busbar is placed at the welding position on the separator, the protrusion or receiving portion on the busbar and the corresponding receiving portion or protrusion on the separator form an insertion fit. On the one hand, this ensures that the busbar is accurately positioned at the welding position on the separator. On the other hand, the insertion structure formed by the protrusion and the receiving portion suppresses the lateral movement of the busbar relative to the separator, reducing the probability of the busbar being misaligned at the welding position relative to the separator. This ensures that the busbar is stably positioned at the welding position on the separator during transportation and transfer, enabling the busbar to be stably and accurately welded to the electrode terminals at the welding position. This improves the welding quality between the busbar and the electrode terminals of the battery cell, thereby increasing the production yield of the battery device.

[0012] In some embodiments, the receiving portion is provided on both adjacent sides of one of the isolation member and the busbar, and the protrusion is provided on both adjacent sides of the other.

[0013] This configuration, through the insertion and mating structure of two sets of receiving parts and protrusions on different sides, can more comprehensively constrain the degree of freedom of movement of the busbar on the isolation member, enhance the ability to suppress the lateral movement of the busbar relative to the isolation member, and further reduce the probability of welding position misalignment of the busbar relative to the isolation member, thereby improving the welding quality between the busbar and the electrode terminals of the battery cell.

[0014] In some embodiments, one of the isolation member and the busbar is provided with at least three receiving portions, the centers of each receiving portion are not on the same straight line, and the other of the isolation member and the busbar is provided with at least three protrusions.

[0015] This configuration ensures that after the isolation component and the busbar are assembled, there is at least one set of plug-in structures distributed along a triangular trajectory between them. This creates a structure on the isolation component that provides stable support and constraint for the busbar, restricting the degree of freedom of movement and rotation of the busbar relative to the isolation component. This effectively resists movement of the busbar relative to the isolation component in any direction, further reducing the probability of welding position misalignment of the busbar relative to the isolation component, thereby improving the welding quality between the busbar and the electrode terminals of the battery cell.

[0016] In some embodiments, a limiting groove is formed on the isolation member, the manifold is disposed in the limiting groove, at least one of the protrusions is disposed on the side wall of the limiting groove, and at least one protrusion is disposed on the bottom wall of the limiting groove.

[0017] With this configuration, the protrusions on the sidewall and bottom wall of the limiting groove provide positioning guidance for the receiving parts at the edge and middle positions of the busbar, respectively. The mating insertion structure of these two pairs of receiving parts and protrusions jointly positions and constrains the busbar in the circumferential direction. At the same time, the inner circumferential wall of the limiting groove stops and limits the busbar in the outer circumferential direction, reducing the probability of the busbar shifting or misaligning with the welding position of the isolation component. This ensures that the busbar is stably positioned at the welding position of the isolation component, thereby improving the welding quality between the busbar and the electrode terminals of the battery cell.

[0018] In some embodiments, the busbar includes two connecting portions, which are respectively connected to the electrode terminals of two adjacent battery cells, and at least one of the protrusions or at least one of the receiving portions is disposed in the busbar and located between the two connecting portions.

[0019] With this configuration, by providing at least one protrusion or at least one receiving part between the two connecting parts of the busbar, and correspondingly providing at least one receiving part or protrusion in the middle region of the isolation member, the receiving part or protrusion in the middle region of the isolation member provides accurate positioning guidance for the busbar to be inserted into the limiting groove, so that the corresponding receiving part 11 on the busbar can be inserted into the protrusion, and in conjunction with the receiving parts and protrusions in other positions, the installation accuracy of the busbar is improved.

[0020] In some embodiments, at least one of the protrusions protrudes from the manifold along its thickness direction.

[0021] This design extends the limiting depth of the limiting groove on the busbar by the protrusion protruding from the busbar, reducing the risk of the busbar coming out of the limiting groove and further reducing the probability of the busbar shifting or misaligning with the welding position of the isolation component.

[0022] In some embodiments, the protrusion is configured as a positioning post on the isolation member, and the outer diameter Φ1 of the protrusion satisfies: 2.4mm≤Φ1≤4.5mm.

[0023] With this configuration, the positioning post is fitted onto the corresponding hole-shaped receiving part on the manifold, facilitating accurate positioning and assembly of the manifold to the welding position of the isolation component. At the same time, by controlling the outer diameter Φ1 of the protrusion within the range of 2.4mm and 4.5mm, the protrusion and the receiving part form a larger contact area, improving the stability of the fit between the isolation component and the manifold, and preventing the protrusion from occupying a large area of ​​the isolation component, thus not compromising the overall structural strength of the isolation component and the manifold.

[0024] In some embodiments, the protrusion is provided on the isolation member, and the axial length of the protrusion is greater than the depth of the receiving portion;

[0025] And / or, the protrusion is provided on the isolation member, and the axial length of the protrusion is greater than the thickness of the busbar.

[0026] With this configuration, the portion of the protrusion that extends beyond the receiving portion can offset the processing error of the isolation component or busbar corresponding to the receiving portion, as well as the assembly error between the isolation component and the busbar, thereby improving the fitting accuracy between the two and improving the welding quality between the busbar and the electrode terminals of the battery cell.

[0027] In some embodiments, the protrusion and the isolation member are integrally formed; or, the protrusion and the busbar are integrally formed.

[0028] This design reduces the machining error between the receiving part and the busbar, and correspondingly reduces the assembly error between the isolation component and the busbar, allowing the protrusion and the receiving part to form a more stable plug-in mating structure.

[0029] Secondly, this application provides an electrical device that includes the battery device described above, the battery device being used to provide electrical energy.

[0030] The electrical equipment according to the second aspect of this application has at least the following beneficial effects:

[0031] The electrical equipment described in this application has good operational stability and reliability because it is equipped with the aforementioned battery device.

[0032] 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

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This is a schematic diagram of the vehicle structure according to an embodiment of this application.

[0035] Figure 2 This is another structural schematic diagram of the vehicle according to an embodiment of this application.

[0036] Figure 3 This is an exploded view of the battery device according to an embodiment of this application.

[0037] Figure 4 This is a schematic diagram of the structure of a single battery cell according to an embodiment of this application.

[0038] Figure 5 This is a schematic diagram of the assembly structure of the battery cell, the isolation component, and the busbar in an embodiment of this application.

[0039] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point A in the diagram.

[0040] Figure 7 for Figure 5 A schematic diagram of the cross-sectional structure at the midline BB.

[0041] Figure 8 This is a schematic diagram of the structure of the isolation component according to an embodiment of this application.

[0042] Figure 9 This is a schematic diagram of the structure of the bus component according to an embodiment of this application.

[0043] Explanation of reference numerals in the attached drawings: Battery device 10; Vehicle 20; Controller 30; Motor 40; Housing 100; First part 101; Second part 102; Receiving cavity 110; Battery cell 200; Electrode terminal 210; Isolation member 300; Limiting groove 310; Busbar 400; Connecting part 410; Receiving part 11; Protrusion 12. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0051] A battery consists of one or more individual battery cells. For each battery, the multiple battery cells that make up it can be connected in series, in parallel, or in a mixed configuration. Among them, a mixed configuration means that multiple battery cells are connected in both series and parallel.

[0052] A battery cell is the smallest unit that makes up a battery. The structure of a battery cell includes a casing, an electrolyte, and electrode assemblies. Electrode assemblies are the components in the battery cell where electrochemical reactions occur. Electrode assemblies include a positive electrode, a negative electrode, and a separator. The casing may contain one or more electrode assemblies, which are mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is placed between the positive and negative electrode sheets.

[0053] The housing has an open end and a hollow interior. The electrode assembly is housed inside the housing, and an end cap is positioned over the opening. The end cap closes the opening to form the internal environment of the battery cell. Alternatively, the end cap and housing can be integrated. Specifically, the end cap and housing can form a common connection surface before other components are inserted into the housing. When the interior of the housing needs to be encapsulated, the end cap closes the housing. The housing can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing can be determined based on the specific shape and size of the electrode assembly. The housing can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic. This application does not impose any special limitations on these materials.

[0054] The battery device includes multiple battery cells and a busbar (also called a bus or a battery pack). The electrode terminals of two adjacent battery cells are welded to the busbar to achieve electrical connection between the battery cells.

[0055] In related technologies, before welding the busbar to the electrode terminals of the battery cell, production workers usually use a limiting fixture to place the busbar at the welding position on the wire harness separator. This results in the busbar being placed at an angle. In addition, during the transportation and transfer of the busbar pressed against the welding position by the limiting fixture to the welding station, the busbar is easily displaced relative to the welding position due to external vibration. All of these situations will cause the busbar to be misaligned relative to the welding position before welding the electrode terminals of the battery cell, resulting in low welding quality between the busbar and the electrode terminals of the battery cell and reducing the production yield of the battery device.

[0056] Based on the above, and addressing the problem in related technologies where the busbar of a battery device is prone to misalignment relative to the welding position before welding to the electrode terminals of the battery cell, resulting in low welding quality between the busbar and the electrode terminals of the battery cell and reducing the production yield of the battery device, one or more embodiments of this application provide a battery device in which, when the battery cell, the isolation component, and the busbar are assembled, the receiving portion or protrusion on the isolation component provides installation positioning for the busbar. When the busbar is placed at the welding position on the isolation component, the protrusion or receiving portion on the busbar and the corresponding receiving portion or protrusion on the isolation component form an insertion fit. On the one hand, this ensures that the busbar is accurately positioned at the welding position of the isolation component. On the other hand, the insertion structure formed by the protrusion and the receiving portion suppresses the lateral movement of the busbar relative to the isolation component, reducing the probability of misalignment of the busbar relative to the welding position of the isolation component. This ensures that the busbar is stably positioned at the welding position of the isolation component during transportation and transfer, enabling the busbar to be stably and accurately welded to the electrode terminals at the welding position, thereby improving the welding quality between the busbar and the electrode terminals of the battery cell and correspondingly improving the production yield of the battery device.

[0057] In this embodiment, the battery device can be used in electrical devices that use the battery device as a power source, or in various energy storage systems that use the battery device as an energy storage element. The electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0058] See Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application. Vehicle 20 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 10 is installed inside vehicle 20, and the battery device 10 can be located at the bottom, front, or rear of vehicle 20. The battery device 10 can be used to power vehicle 20; for example, the battery device 10 can serve as the operating power source for vehicle 20. Vehicle 20 may also include a controller 30 and a motor 40. The controller 30 is used to control the battery device 10 to supply power to the motor 40, for example, to meet the power needs of vehicle 20 during starting, navigation, and driving.

[0059] Of course, in other embodiments, the battery device 10 can not only serve as the operating power source for the vehicle 20, but also as the driving power source for the vehicle 20, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 20.

[0060] See Figure 3 The battery device 10 mentioned in this application may include battery modules or battery packs, and the battery cells 200 may constitute the smallest unit of the battery device 10.

[0061] See Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 This application provides a battery device 10, which includes a housing 100, a plurality of battery cells 200, an isolation component 300, and a busbar 400.

[0062] The housing 100 has a receiving cavity 110, in which multiple battery cells 200 are disposed. An isolation member 300 is disposed on the side of the battery cell 200 having an electrode terminal 210. A busbar 400 is placed on the isolation member 300 and connected to the electrode terminal 210. One of the isolation member 300 and the busbar 400 has a receiving portion 11, and the other has a protrusion 12 that engages with the receiving portion 11.

[0063] It should be noted that, in this application, the housing 100 refers to a structure that houses and provides mechanical support for multiple battery cells 200. All battery cells 200 are arranged in the housing cavity 110 of the housing 100 along a predetermined direction, which includes, but is not limited to, single-row, single-column, multi-row, multi-column, and multi-row multi-column array arrangements. The housing 100 may also integrate a BMS (Battery Management System), a thermal management system, etc., to monitor the operating status of each battery cell 200 in real time.

[0064] See Figure 3 The housing 100 may include a first part 101 and a second part 102, which cover each other. The first part 101 and the second part 102 together define a receiving cavity 110 for accommodating the battery cell 200. The housing 100 formed by the first part 101 and the second part 102 can be of various shapes, such as a cylinder or a cuboid.

[0065] In this application, the isolation member 300 refers to the wiring harness isolation bracket or wiring harness isolation plate inside the housing 100. The isolation member 300 can be fixed to the inner wall of the housing 100 by detachable structural components such as clips and screws. Of course, the isolation member 300 can also be embedded in a pre-reserved slot inside the housing 100. The isolation member 300 can cover the side of all battery cells 200 with electrode terminals 210, or the isolation member 300 can form multiple interconnected isolation parts, each isolation part covering the side of the corresponding battery cell 200 with electrode terminals 210.

[0066] The isolation member 300 is used to separate the battery cell 200 from the metal structure on the housing 100, so that the battery cell 200 will not be in contact with the metal structure on the housing 100. At the same time, the isolation member 300 is also used to isolate wire harnesses with different potentials within the housing 100, such as separating the wire harness of the positive electrode terminal on the battery cell 200 from the wire harness of the negative electrode terminal.

[0067] See Figure 5 , Figure 7 and Figure 8 The isolation member 300 has a welding position, and the busbar 400 is placed on the welding position and welded to the electrode terminal 210 of the battery cell 200. The welding position can be a limiting groove 310 or a limiting notch, etc. When the isolation member 300 is stable on the side of the battery cell 200 with the electrode terminal 210, the electrode terminal 210 of the battery cell 200 is located on the welding position of the isolation member 300, and the busbar 400 is placed on the welding position of the isolation member 300 and welded to the electrode terminal 210 at the welding position.

[0068] In this application, the busbar 400 refers to an electrical connection structure used to connect the electrode terminals 210 of multiple battery cells 200 into a series circuit or a parallel circuit. The busbar 400 is welded to the electrode terminals 210 at the welding position, thus forming an electrical connection with the electrode terminals 210. After the circuit board of the battery device 10 is electrically connected to the busbar 400, the sampling circuit on it can collect parameter information such as current, voltage, and temperature of the battery cells 200, so as to cooperate with the BMS to monitor the operating status of the battery device 10 in real time.

[0069] In this application, the fact that one of the isolation member 300 and the busbar 400 is provided with a receiving portion 11 and the other is provided with a protrusion 12 that is inserted and engaged with the receiving portion 11 can be understood as follows: the isolation member 300 is provided with a receiving portion 11 and the busbar 400 is provided with a protrusion 12, and the protrusion 12 is inserted and engaged with the receiving portion 11; or, the busbar 400 is provided with a receiving portion 11 and the isolation member 300 is provided with a protrusion 12, and the protrusion 12 is inserted and engaged with the receiving portion 11; or, both the isolation member 300 and the busbar 400 are provided with a receiving portion 11 and a protrusion 12, and the receiving portion 11 and the protrusion 12 of the isolation member 300 are correspondingly inserted and engaged with the protrusion 12 and the receiving portion 11 of the busbar 400.

[0070] For the receiving part 11 and the protrusion 12, the receiving part 11 can be a structure with a cavity such as a groove, a through hole, or a keyway. Correspondingly, the protrusion 12 can be a protrusion that is inserted into the groove, a positioning post that is inserted into the through hole, or a key tooth that is inserted into the keyway.

[0071] It is understood that when the battery cell 200, the insulating member 300, and the busbar 400 of the battery device 10 in this embodiment of the application are assembled, the receiving portion 11 or the protrusion 12 on the insulating member 300 provides mounting positioning for the busbar 400. When the busbar 400 is placed at the welding position on the insulating member 300, the protrusion 12 or the receiving portion 11 on the busbar 400 and the corresponding receiving portion 11 or the protrusion 12 on the insulating member 300 form an insertion fit. On the one hand, this ensures that the busbar 400 is accurately positioned at the welding position of the insulating member 300, and on the other hand... On the other hand, the plug-in structure formed by the protrusion 12 and the receiving part 11 suppresses the lateral movement of the busbar 400 relative to the isolation member 300, reduces the probability of the welding position of the busbar 400 relative to the isolation member 300, so that the busbar 400 is stably located at the welding position of the isolation member 300 during transportation and transfer, and the busbar 400 can be stably and accurately welded to the electrode terminal 210 at the welding position, thereby improving the welding quality between the busbar 400 and the electrode terminal 210 of the battery cell 200, and correspondingly improving the production yield of the battery device 10.

[0072] In some embodiments of this application, one of the isolation member 300 and the busbar 400 is provided with receiving portions 11 on both adjacent sides, and the other is provided with protrusions 12 on both adjacent sides.

[0073] Specifically, see Figure 7 , Figure 8 and Figure 9Both the isolation member 300 and the busbar 400 are sheet-like structures. The isolation member 300 has protrusions 12 on both adjacent sides. That is, the line connecting the two protrusions 12 does not coincide with the length or width of the isolation member 300. Correspondingly, the busbar 400 has receiving parts 11 on both adjacent sides. That is, the line connecting the two receiving parts 11 does not coincide with the length or width of the busbar 400.

[0074] It is easy to understand that when the busbar 400 is positioned and assembled to the welding position of the isolation member 300, the isolation member 300 is in a fixed state connected to the battery cell 200. The two protrusions 12 on the isolation member 300 position the assembly position of the busbar 400 on the isolation member 300. The two receiving parts 11 on the busbar 400 are inserted into the corresponding two protrusions 12 on the isolation member 300, so that the busbar 400 is accurately installed at the welding position of the isolation member 300.

[0075] By using the insertion and mating structure of two sets of receiving parts 11 and protrusions 12 on different sides, the movement freedom of the busbar 400 on the isolation member 300 can be more comprehensively constrained, the ability to suppress the lateral movement of the busbar 400 relative to the isolation member 300 can be enhanced, and the probability of welding position misalignment of the busbar 400 relative to the isolation member 300 can be further reduced, thereby improving the welding quality between the busbar 400 and the electrode terminal 210 of the battery cell 200.

[0076] Of course, in other embodiments, the isolation member 300 is provided with receiving portions 11 on both adjacent sides, and the confluence member 400 is provided with protrusions 12 on both adjacent sides.

[0077] Alternatively, the isolation member 300 may have a receiving portion 11 and a protrusion 12 on its adjacent sides, and the confluence member 400 may have a protrusion 12 and a receiving portion 11 on its adjacent sides.

[0078] In some embodiments of this application, one of the isolation member 300 and the busbar 400 is provided with at least three receiving portions 11, the centers of each receiving portion 11 are not on the same straight line, and the other of the isolation member 300 and the busbar 400 is provided with at least three protrusions 12.

[0079] It should be noted that the protrusion 12 can be a regular columnar structure or a block structure, and the receiving part 11 can be a regular hole structure or a groove structure. The center of the protrusion 12 is its geometric center, and the center of the receiving part 11 also corresponds to its geometric center.

[0080] See Figure 5 , Figure 6 , Figure 8 and Figure 9The isolation member 300 is provided with three protrusions 12, the centers of the three protrusions 12 are not on the same straight line, that is, the centers of the three protrusions 12 are connected in sequence to form a closed triangle. Correspondingly, the busbar 400 is provided with three receiving parts 11, the center lines of the three receiving parts 11 are not on the same straight line, and the centers of the three receiving parts 11 are connected in sequence to form a closed triangle.

[0081] Of course, in other embodiments, at least three receiving portions 11 may be provided on different straight lines of the isolation member 300, and at least three protrusions 12 may be provided on different straight lines of the busbar 400.

[0082] By arranging at least three receiving parts 11 on different straight lines of the isolation member 300 or the busbar 400, after the isolation member 300 and the busbar 400 are assembled in layers, there is at least one set of plug-in structures distributed in a triangular trajectory between them. This forms a structure on the isolation member 300 that stably supports and constrains the busbar 400, restricting the degree of freedom of movement and rotation of the busbar 400 relative to the isolation member 300. This effectively resists the movement of the busbar 400 relative to the isolation member 300 in any direction, further reducing the probability of welding position misalignment of the busbar 400 relative to the isolation member 300, thereby improving the welding quality between the busbar 400 and the electrode terminal 210 of the battery cell 200.

[0083] In addition, it should be noted that in the insertion structure of the three pairs of protrusions 12 and receiving parts 11 distributed in a triangular trajectory, when one pair of protrusions 12 and receiving parts 11 becomes loose due to processing errors or fatigue, at least two pairs of protrusions 12 and receiving parts 11 can still maintain the relative stability between the busbar 400 and the isolation member 300.

[0084] Further, see Figure 5 , Figure 7 and Figure 8 A limiting groove 310 is formed on the isolation member 300, the confluence member 400 is disposed in the limiting groove 310, at least one of the protrusions 12 is disposed on the side wall of the limiting groove 310 (not shown in the figure), and at least one protrusion 12 is disposed on the bottom wall of the limiting groove 310 (not shown in the figure).

[0085] Specifically, the limiting groove 310 is recessed from the busbar 400 toward the battery cell 200, and the shape of the limiting groove 310 is adapted to the shape of the busbar 400. The side wall of the limiting groove 310 refers to the inner wall of the limiting groove 310 that is parallel to the thickness direction of the isolation member 300, and the bottom wall of the limiting groove 310 refers to the inner wall of the limiting groove 310 that is perpendicular to the thickness direction of the isolation member 300. The side wall and the bottom wall of the limiting groove 310 together form the peripheral wall of the limiting groove 310.

[0086] Correspondingly, at least one receiving part 11 is provided at the edge of the manifold 400, which corresponds to the protrusion 12 on the side wall of the limiting groove 310. At least one receiving part 11 is provided at the middle position of the manifold 400, which corresponds to the receiving part 11 on the bottom wall of the limiting groove 310.

[0087] In the above structure, the limiting groove 310 on the isolation member 300 accurately positions the assembly position of the busbar 400. The protrusions 12 on the side wall and bottom wall of the limiting groove 310 provide positioning guidance for the receiving part 11 at the edge and the receiving part 11 at the middle position of the busbar 400. The mating and plugging structure of the two pairs of receiving parts 11 and protrusions 12 jointly positions and constrains the circumferential direction of the busbar 400. At the same time, the inner circumferential wall of the limiting groove 310 stops and limits the outer circumferential direction of the busbar 400, reducing the probability of the welding position of the busbar 400 relative to the isolation member 300. This ensures that the busbar 400 is stably positioned at the welding position of the isolation member 300, thereby improving the welding quality between the busbar 400 and the electrode terminal 210 of the battery cell 200.

[0088] Further, see Figure 5 The busbar 400 includes two connecting portions 410, which are respectively connected to the electrode terminals 210 of two adjacent battery cells 200. At least one protrusion 12 or at least one receiving portion 11 is provided in the busbar 400 and located between the two connecting portions 410.

[0089] Specifically, see Figure 8 and Figure 9 The connecting portion 410 can be understood as a local area of ​​the busbar 400, and the two connecting portions 410 are two local areas of the busbar 400 along its own length. The busbar 400 is placed on the limiting groove 310, and the two adjacent electrode terminals 210 on two adjacent battery cells 200 are welded to the two connecting portions 410 respectively, so that the two adjacent battery cells 200 are connected in series.

[0090] Meanwhile, two receiving portions 11 are provided on the same side of the manifold 400, and one receiving portion 11 is provided in the middle region of the manifold 400, which is located between the two connecting portions 410 on the manifold 400. Correspondingly, three protrusions 12 are provided on the limiting groove 310, of which two protrusions 12 are respectively provided on the same side wall of the limiting groove 310, and the other protrusion 12 is provided in the middle region of the limiting groove 310.

[0091] The protrusion 12 located in the middle region of the limiting groove 310 provides accurate positioning guidance for the busbar 400 to be inserted into the limiting groove 310, so that the corresponding receiving part 11 on the busbar 400 can be inserted into the protrusion 12. In conjunction with the receiving parts 11 and protrusion 12 in other positions, the installation accuracy of the busbar 400 is improved.

[0092] Of course, in other embodiments, two protrusions 12 may be provided on the same side of the busbar 400, and one protrusion 12 may be provided in the middle region of the busbar 400, which is located between the two connecting portions 410 on the busbar 400. Correspondingly, two receiving portions 11 are provided on the same side of the isolation member 300, and one receiving portion 11 is provided in the middle region of the isolation member 300.

[0093] It is easy to understand that by providing at least one protrusion 12 or at least one receiving part 11 between the two connecting parts 410 of the busbar 400, and correspondingly providing at least one receiving part 11 or protrusion 12 in the middle region of the isolation member 300, the receiving part 11 or protrusion 12 in the middle region of the isolation member 300 provides accurate positioning guidance for the busbar 400 to be inserted into the limiting groove 310, so that the corresponding receiving part 11 on the busbar 400 is inserted into the protrusion 12, and in conjunction with the receiving parts 11 and protrusion 12 in other positions, the installation accuracy of the busbar 400 is improved.

[0094] Furthermore, at least one protrusion 12 protrudes from the manifold 400 along the thickness direction of the manifold 400.

[0095] In some embodiments, the limiting groove 310 is provided with three protrusions 12, two of which are located on the side wall of the limiting groove 310, and the other protrusion 12 is located at the geometric center of the limiting groove 310. The protrusion 12 located at the geometric center of the limiting groove 310 extends from the bottom wall of the limiting groove 310 toward the thickness direction of the manifold 400 and protrudes from the surface of the manifold 400.

[0096] Thus, the insertion structure of the three pairs of protrusions 12 and receiving parts 11 forms a triangular distribution, which makes the busbar 400 stably positioned at the welding position of the isolation member 300. At the same time, the protrusions 12 protruding from the busbar 400 extend the limiting depth of the limiting groove 310 on the busbar 400, reducing the risk of the busbar 400 falling out of the limiting groove 310, and further reducing the probability of the busbar 400 being misaligned relative to the welding position of the isolation member 300.

[0097] Furthermore, the portion of the protrusion 12 that protrudes relative to the manifold 400 is defined as the protrusion. The protrusion can be constructed as a barb structure with an outer diameter larger than the outer diameter of the receiving portion 11, which limits and constrains the degree of freedom of movement of the manifold 400 in a direction perpendicular to the manifold 400, and further limits and fixes the manifold 400 on the limiting groove 310 of the isolation member 300.

[0098] In some embodiments of this application, see Figure 5 and Figure 6 The protrusion 12 is configured as a positioning post on the isolation member 300, and the outer diameter Φ1 of the protrusion 12 satisfies: 2.4mm≤Φ1≤4.5mm.

[0099] Specifically, the protrusion 12 can be a cylindrical, square, or polygonal column structure, and its outer diameter can be 2.4 mm, 2.6 mm, 3.0 mm, or 4.5 mm. The receiving part 11 is a hole-like structure, such as a round hole, square hole, or polygonal hole, and its inner diameter matches the outer diameter Φ1 of the protrusion 12.

[0100] By constructing the protrusion 12 as a positioning post on the isolation member 300, the positioning post is fitted onto the corresponding hole-shaped receiving part 11 on the busbar 400, which facilitates the accurate positioning and assembly of the busbar 400 to the welding position of the isolation member 300. At the same time, by controlling the outer diameter Φ1 of the protrusion 12 within the range of 2.4mm and 4.5mm, a larger contact area is formed between the protrusion 12 and the receiving part 11, which improves the fit and stability of the isolation member 300 and the busbar 400, and also prevents the protrusion 12 from occupying a large area of ​​the isolation member 300, thus not compromising the overall structural strength of the isolation member 300 and the busbar 400.

[0101] In some embodiments of this application, the protrusion 12 is provided on the isolation member 300, and the axial length of the protrusion 12 is greater than the depth of the receiving part 11.

[0102] Specifically, if the axial length of the protrusion 12 is defined as L and the depth of the receiving part 11 is defined as H, then L > H.

[0103] With this configuration, the portion of the protrusion 12 that extends beyond the receiving portion 11 can offset the processing error of the isolation member 300 or the busbar 400 corresponding to the receiving portion 11, and can also offset the assembly error between the isolation member 300 and the busbar 400, thereby improving the fitting accuracy between the two and improving the welding quality between the busbar 400 and the electrode terminal 210 of the battery cell 200.

[0104] In some embodiments of this application, the protrusion 12 is provided on the isolation member 300, and the axial length of the protrusion 12 is greater than the thickness of the busbar 400.

[0105] Specifically, the axial length of the protrusion 12 is defined as L, and the thickness of the manifold 400 is defined as D. Then L is greater than D. Specifically, 1.2mm ≤ (LD) ≤ 1.5mm.

[0106] Similarly, in the above configuration, the axial length of the protrusion 12 exceeds the thickness of the busbar 400, so that the axial length of the protrusion 12 will always be greater than the depth of the receiving portion 11 on the busbar 400. The portion of the protrusion 12 that exceeds the receiving portion 11 can offset the processing error of the isolation member 300 or the busbar 400 corresponding to the receiving portion 11, and can also offset the assembly error between the isolation member 300 and the busbar 400, improve the fitting accuracy between the two, and thus improve the welding quality between the busbar 400 and the electrode terminal 210 of the battery cell 200.

[0107] In some embodiments of this application, see Figure 8 The protrusion 12 and the isolation member 300 are integrally formed, and the receiving part 11 and the busbar 400 are integrally formed.

[0108] Specifically, the protrusion 12 can be located at the edge or middle of the isolation member 300. The protrusion 12 and the isolation member 300 are made of the same material and are integrally injection molded. Correspondingly, the receiving part 11 is a hole-like structure opened on the manifold 400.

[0109] By making the protrusion 12 and the isolation member 300 an integrally formed structure, the processing error between the protrusion 12 and the isolation member 300 can be reduced. Similarly, by making the receiving part 11 and the busbar 400 an integrally formed structure, the processing error between the receiving part 11 and the busbar 400 can be reduced, which in turn reduces the assembly error between the isolation member 300 and the busbar 400, so that the protrusion 12 and the receiving part 11 can form a more stable plug-in mating structure.

[0110] Of course, in other embodiments, the protrusion 12 and the busbar 400 are integrally formed, and the receiving part 11 and the isolation member 300 are integrally formed. This can also reduce the assembly error between the isolation member 300 and the busbar 400, so that the protrusion 12 and the receiving part 11 can form a more stable plug-in mating structure.

[0111] This application also provides an electrical device, which includes a battery device 10 from any of the above embodiments. The battery device 10 is used to provide electrical energy to the electrical device.

[0112] Specifically, see Figure 1 and Figure 2The electrical equipment can be vehicles 20, 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 special limitations on the above-mentioned electrical equipment.

[0113] The electrical equipment of this application embodiment has good stability and reliability in use because it is equipped with the battery device 10 described above.

[0114] See Figures 1 to 9 This application provides a battery device 10 and an electrical device. The battery device 10 includes: a housing 100 with a receiving cavity 110; a plurality of battery cells 200, all disposed in the receiving cavity 110; an isolation member 300 and a busbar 400. The isolation member 300 is disposed on the side of the battery cell 200 with electrode terminals 210, and the busbar 400 is placed on the isolation member 300 and connected to the electrode terminals 210. One of the isolation member 300 and the busbar 400 has at least three receiving portions 11, the centers of which are not on the same straight line. The other of the isolation member 300 and the busbar 400 has at least three protrusions 12, which are inserted into and cooperate with the receiving portions 11. The electrical device includes the aforementioned battery device 10.

[0115] The electrical device 10 of this application embodiment, by arranging at least three receiving parts 11 on different straight lines of the isolation member 300 or the busbar 400, ensures that after the isolation member 300 and the busbar 400 are assembled in layers, there is at least one set of plug-in structures distributed according to a triangular trajectory between them. This forms a structure on the isolation member 300 that stably supports and constrains the busbar 400, thereby restricting the degree of freedom of movement and rotation of the busbar 400 relative to the isolation member 300. This effectively resists the movement of the busbar 400 relative to the isolation member 300 in any direction, further reducing the probability of welding position misalignment of the busbar 400 relative to the isolation member 300, thereby improving the welding quality between the busbar 400 and the electrode terminal 210 of the battery cell 200.

[0116] The electrical equipment of this application embodiment has good stability and reliability in use because it is equipped with the battery device 10 described above.

[0117] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: The box-shaped enclosure has a receiving cavity; Multiple battery cells are disposed in the receiving cavity; The battery cell includes an isolation component and a busbar, wherein the isolation component is disposed on the side of the battery cell having electrode terminals, and the busbar is placed on the isolation component and connected to the electrode terminals; The isolation member and the busbar are provided with a receiving part, and the other is provided with a protrusion that is inserted and engaged with the receiving part.

2. The battery device according to claim 1, characterized in that, The receiving portion is provided on both adjacent sides of one of the isolation member and the busbar, and the protrusion is provided on both adjacent sides of the other member.

3. The battery device according to claim 1, characterized in that, One of the isolation member and the busbar is provided with at least three receiving portions, the centers of each receiving portion are not on the same straight line, and the other of the isolation member and the busbar is provided with at least three protrusions.

4. The battery device according to claim 3, characterized in that, A limiting groove is formed on the isolation member, the manifold is disposed in the limiting groove, at least one of the protrusions is disposed on the side wall of the limiting groove, and at least one protrusion is disposed on the bottom wall of the limiting groove.

5. The battery device according to claim 1, characterized in that, The busbar includes two connecting portions, which are respectively connected to the electrode terminals of two adjacent battery cells. At least one of the protrusions or at least one of the receiving portions is provided in the busbar and located between the two connecting portions.

6. The battery device according to claim 1, characterized in that, At least one of the protrusions protrudes from the manifold along its thickness direction.

7. The battery device according to any one of claims 1 to 6, characterized in that, The protrusion is configured as a positioning post on the isolation member, and the outer diameter Φ1 of the protrusion satisfies: 2.4mm≤Φ1≤4.5mm.

8. The battery device according to any one of claims 1 to 6, characterized in that, The protrusion is provided on the isolation member, and the axial length of the protrusion is greater than the depth of the receiving part; And / or, the protrusion is provided on the isolation member, and the axial length of the protrusion is greater than the thickness of the manifold.

9. The battery device according to any one of claims 1 to 6, characterized in that, The protrusion and the isolation member are integrally formed; or, the protrusion and the busbar are integrally formed.

10. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 9, the battery device being used to provide electrical energy.

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