Battery device, electric equipment and energy storage equipment

Abstract

The invention provides a battery device, electric equipment and energy storage equipment. The battery device comprises at least two battery monomers, a box body and an output electrode assembly, the box body is provided with an accommodating cavity for accommodating at least two battery monomers and comprises side plates which are enclosed in the circumferential direction to form the accommodating cavity; the side plate is provided with an output port. The output pole assembly comprises an output pole connecting piece. The output pole connecting piece comprises a first section and a second section which are distributed in the extending direction of the output pole connecting piece. The first segment is electrically connected with at least two battery cells. The end part of the second section extends to the output port, and the end part of the second section forms an external power output interface of the battery device. According to the battery device, the external output interface of the battery device is formed at the end part of the second section of the output pole connecting piece, so that an adapter is not needed for switching, the space occupied by the adapter and parts thereof is saved, and the space utilization rate of the whole battery device is further improved, so that the energy density of the battery device is improved.

Description

Technical Field

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

[0002] With the rapid development of new energy sources, battery devices, as the core power source for electric vehicles, energy storage equipment, and other devices, are of paramount importance in terms of performance.

[0003] The energy density of a battery is one of the key indicators of battery performance, directly affecting the driving range of electric vehicles. Therefore, improving the energy density of battery devices is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device, an electrical device, and an energy storage device to improve the energy density of the battery device.

[0005] This application provides a battery device including at least two battery cells, a housing, and an output electrode assembly. The housing has a receiving cavity for accommodating the at least two battery cells and includes a side plate that surrounds the receiving cavity in the circumferential direction. An output port is provided on the side plate. The output electrode assembly includes an output electrode connecting piece. The output electrode connecting piece includes a first segment and a second segment distributed in its extending direction. The first segment is electrically connected to the at least two battery cells. The end of the second segment extends to the output port, and the end of the second segment forms an external power output interface for the battery device.

[0006] In the technical solution of this application embodiment, the end of the second segment of the output electrode connecting piece of the output electrode assembly extends to the output port so that the end of the second segment forms the external output interface of the battery device. This eliminates the need for an adapter, saving the space occupied by the adapter and its components, thereby improving the space utilization of the entire battery device and increasing the energy density of the battery device.

[0007] In some embodiments, the end of the second segment is provided with a connecting hole and a nut is provided at the connecting hole, the connecting hole being configured to be electrically connected to an external electrical connector via the nut.

[0008] The output electrode connector of this embodiment has a connection hole at its end, and a nut is provided at the connection hole. This allows for direct electrical connection between the external electrical connector and the end of the second segment via a bolt and nut threaded engagement, simplifying operation and improving installation convenience. Furthermore, this embodiment balances conductivity and mechanical reliability by embedding a high-strength nut into the highly conductive output electrode connector. This nut, with a strength higher than the output electrode connector, can withstand repeated tightening and loosening, improving the operational reliability of the battery device.

[0009] In some embodiments, the nut includes a press-fit nut. The nut in this application embodiment is a press-fit nut, which engages with the output electrode connecting piece through riveting deformation, thereby improving vibration resistance and further enhancing the reliability of the battery device.

[0010] In some embodiments, the output electrode assembly further includes an insulating shell sleeved on the outside of the output electrode connecting piece, the insulating shell being connected to a side plate and having an opening configured to expose the connecting hole.

[0011] In this embodiment, the insulating shell is fitted over the outside of the output electrode connecting piece, insulating and isolating the output electrode connecting piece from the side plate to prevent high-voltage leakage. Furthermore, the insulating shell is connected to the side plate, thus providing stable support for the output electrode connecting piece.

[0012] In some embodiments, the output electrode assembly further includes a blocking wall that protrudes from the insulating shell and surrounds the opening in the circumferential direction. The blocking wall on the insulating shell of the output electrode assembly in this embodiment extends the creepage path of current on the surface of the insulating shell, effectively increasing the creepage distance and thus reducing the risk of arcing, thereby improving the safety of the battery device.

[0013] In some embodiments, the blocking wall and the insulating shell are integrally injection molded. This integral injection molding of the blocking wall and insulating shell in the embodiments of this application effectively avoids the problem of shortened creepage paths that may be caused by assembly gaps, and helps to improve the integrity and continuity of the insulation barrier between the high-voltage output electrode connecting piece and the side plate, ensuring consistent electrical insulation performance. Furthermore, integral injection molding can reduce assembly steps in production, effectively avoiding assembly errors caused by assembly, and improving production efficiency and product yield.

[0014] In some embodiments, the insulating shell is further provided with a first contact resistance detection hole and a second contact resistance detection hole that are isolated from each other. The first contact resistance detection hole is configured to allow the probe to pass through and contact the output electrode connection piece, and the second contact resistance detection hole is configured to allow the probe to pass through and contact an external electrical connector.

[0015] This embodiment of the application provides contact resistance detection holes on the insulating shell, leading to the output electrode connecting piece and the external electrical connector respectively. This allows the probe to be directly inserted into the contact resistance detection holes to measure the resistance, ensuring that the bolt torque of each battery device remains at the same level, thus improving quality control during manufacturing. Furthermore, throughout the entire lifespan of the battery device, regular maintenance and inspection can be performed through these contact resistance detection holes, enabling timely detection and elimination of connection faults caused by loose bolts, effectively improving operational safety.

[0016] In some embodiments, the insulating shell is connected to the side plate, and a sealing ring is provided between the inner surfaces of the insulating shell and the side plate. This embodiment effectively prevents water, dust, and other contaminants from entering the casing from the output port by providing the sealing ring, effectively improving the operational reliability of the battery device. Furthermore, preventing the intrusion of these contaminants ensures the dryness and cleanliness of the casing interior, ensuring insulation protection of the high-voltage circuit and avoiding safety hazards such as short circuits and arcing caused by condensation or other impurities, thus guaranteeing electrical safety.

[0017] In some embodiments, the output electrode connector is a bent structure and includes a bent section disposed between a first segment and a second segment. The bent section comprises multiple layers of metal foil. The bent section formed by the multiple layers of metal foil has strong ductility and flexibility. When the second segment of the output electrode connector undergoes relative displacement, the stress causes the multiple layers of metal foil to undergo flexible, integral deformation. This dissipates the stress in the bent section, preventing the stress from being transmitted to the connection point with the battery cell, thereby improving the connection reliability between the output electrode connector and the battery cell.

[0018] In some embodiments, the first segment comprises solid metal; and / or, the second segment comprises solid metal. The first segment of the output electrode connector in this application embodiment comprises solid metal, which provides higher strength and better enables connection with the battery cell. The second segment needs to be assembled with external electrical connectors; therefore, setting the second segment as solid metal provides a stronger support surface for assembly, ensuring sufficient connection strength and contact pressure.

[0019] In some embodiments, the output electrode assembly further includes an elastic tube sleeved on the outside of the bent section. By sleeved with an elastic tube on the outside of the bent section, this embodiment of the application can reduce stress concentration in the corner bending area during vibration, effectively preventing cracking.

[0020] In some embodiments, the output electrode connector is made of aluminum.

[0021] A second aspect of this application provides an electrical device including the aforementioned battery device, which provides electrical energy.

[0022] A third aspect of this application provides an energy storage device, including the aforementioned battery device, which stores electrical energy.

[0023] 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

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application.

[0026] Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application.

[0027] Figure 3 This is a partially enlarged structural schematic diagram of a battery device according to some embodiments of this application.

[0028] Figure 4 This is a three-dimensional structural schematic diagram of the output electrode assembly of a battery device according to some embodiments of this application.

[0029] Figure 5 This is a schematic diagram of the structure of the output terminal connection piece of the output terminal assembly in some embodiments of this application.

[0030] Figure 6 This is a cross-sectional structural diagram of the output electrode connection piece in some embodiments of this application.

[0031] Figure 7 This is a front view structural schematic diagram of the output electrode assembly of a battery device according to some embodiments of this application.

[0032] Figure 8 yes Figure 7 A schematic diagram of the cross-sectional structure along the AA direction.

[0033] The accompanying drawings are not drawn to scale.

[0034] Explanation of the marking.

[0035] 2000, vehicles.

[0036] 1000. Battery device.

[0037] 200. Cabinet; 210. Side panel; 211. Output port; 212. Through hole; 220. Base plate.

[0038] 100. Battery cell; 110. Terminal post.

[0039] 300. Output pole components.

[0040] 310. Output pole connecting piece; 311. First section; 312. Second section; 3121. Connecting hole; 313. Bending section; 3131. Metal foil; 314. Nut.

[0041] 320. Insulating shell; 321. Injection molded shell; 322. Flexible tube.

[0042] 330. Blocking wall.

[0043] 340, First contact resistance detection hole; 360, Second contact resistance detection hole; 370, Connector.

[0044] 350. Sealing ring. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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).

[0050] 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.

[0051] 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.

[0052] Currently, judging from market trends, the application of batteries is 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 widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0053] The battery device includes a housing and at least two individual battery cells disposed within the housing. The at least two individual battery cells are energy storage components within the housing. The housing also contains other non-energy storage components, such as various connecting structures or electrical connections. This application proposes that reducing the space occupied by non-energy storage components can improve space utilization and thus increase the energy density of the entire battery device.

[0054] To address the above issues, this application, during its research, discovered that related battery devices have a connector at their electrical output end. This connector is used to connect to an external electrical connector to output electrical energy. In other words, the battery device's electrical output requires a connector, which occupies space, as do the connector plug and other components, thus reducing the battery device's space utilization. Therefore, this application proposes a battery device where the end of the output electrode connector directly forms an external electrical output port, eliminating the need for a connector. This improves the battery device's space utilization and, consequently, its energy density.

[0055] refer to Figures 1 to 8The structure of a battery device according to some embodiments of this application and the structure of an electrical device that uses the battery device to provide electrical energy will be described in detail.

[0056] This application provides an electrical device including the aforementioned battery device, which provides electrical energy. The electrical device can be any type of device that uses a battery device as its power source, including but not limited to mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, ships, and spacecraft. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft.

[0057] For ease of explanation, the following embodiments use a vehicle 2000 as an example of an electrical device from some embodiments of this application.

[0058] Figure 1 A vehicle 2000 is shown using a battery device 1000 as its power source. (Reference) 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. The driving force of the drive motor may be entirely electrical energy, or partially electrical energy and partially other energy sources. For example, the vehicle 2000 may also include a power source such as an engine. Any device that uses the battery device 1000 as a power source is within the scope of protection of this application.

[0059] The battery device 1000 of this application embodiment includes at least two battery cells 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 200 for accommodating the plurality of battery cells 100. The housing 200 has a receiving cavity, in which the plurality of battery cells 100 are arranged. Specifically, the housing 200 of this embodiment is a frame-shaped housing. Of course, in other embodiments, the housing 200 may also be a disc-shaped housing or other shapes.

[0060] The 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 does not limit this. Multiple battery cells are electrically connected via connecting tabs. The multiple battery cells connected by the connecting tabs can be connected in series, in parallel, or in a mixed configuration.

[0061] The battery cell 100 is the smallest unit constituting the battery device 1000. The battery cell 100 includes a casing, end caps, electrode assemblies, terminals 110, and other functional components. The inner cavity of the casing houses 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 assemblies can be of a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0062] The end cap closes to the opening of the housing to isolate the internal environment of the battery cell 100 from the external environment. The shape of the end cap can be adapted to the shape of the housing to fit it. Optionally, the end cap can be made of a material with a certain degree of hardness and strength (such as aluminum alloy), so that the end cap is less prone to deformation under pressure and impact, giving the battery cell higher structural strength and improving safety performance. A terminal post 110 is provided on the end cap, which is used for electrical connection with the electrode assembly for outputting or inputting electrical energy into the battery cell.

[0063] In some embodiments of this application, reference is made to Figures 2 to 8 This application provides a battery device including at least two battery cells 100, a housing 200, and an output electrode assembly 300. The housing 200 has a receiving cavity for accommodating at least two battery cells 100 and includes a side plate 210 that surrounds the receiving cavity in the circumferential direction. An output port 211 is provided on the side plate 210. The output electrode assembly 300 includes an output electrode connecting piece 310. The output electrode connecting piece 310 includes a first segment 311 and a second segment 312 distributed in its extending direction. The first segment 311 is electrically connected to at least two battery cells 100, and the end of the second segment 312 extends to the output port 211. The end of the second segment forms an external power output interface for the battery device.

[0064] refer to Figure 2 At least two battery cells 100 are arranged in an array within the receiving cavity of the housing 200. In some embodiments, at least two battery cells 100 are arranged sequentially in a first direction X to form a battery pack, and at least two battery packs are arranged sequentially in a second direction Y to form an array, wherein the second direction Y is perpendicular to the first direction X. For example, the battery cell 100 is a prismatic battery, the first direction X may be parallel to its length direction, and the second direction Y may be parallel to its thickness direction.

[0065] Continue to refer to Figure 2The housing 200 includes side plates 210 that enclose the cavity in the circumferential direction. For example, the housing 200 may be a rectangular housing and include four side plates 210 arranged sequentially in the circumferential direction. Of course, the housing 200 may also have other shapes, and correspondingly, the shapes of the side plates 210 will change accordingly. The housing 200 also includes a bottom plate 220 disposed on the bottom surface of the cavity. The side plates 210 and the bottom plate 220 together enclose the cavity. (Reference) Figure 2 The side plate 210 is provided with an output port 211. For example, the side plate 210 has two output ports 211, namely a positive output port and a negative output port 211. The output port 211 extends through the thickness direction of the side plate 210 so that the end of the output electrode connecting piece located inside the side plate 210 can be exposed through the output port to realize electrical connection with external electrical connectors.

[0066] Specifically Figure 2 In this embodiment, the output port 211 is square. In other embodiments, the output port 211 may also be other shapes, and this application does not limit this.

[0067] refer to Figure 4 The output electrode assembly 300 in this embodiment includes an output electrode connector 310. (See reference...) Figure 5 The output terminal connector 310 includes a first segment 311 and a second segment 312 distributed along its extending direction. (See reference) Figure 2 and Figure 3 The first segment 311 of the output electrode connector 310 is electrically connected to the battery cell 100, and the end of the second segment 312 of the output electrode connector 310 extends to the output port 211 of the side plate 210 to form an external power output interface.

[0068] Specifically, adjacent battery cells 100 are electrically connected via an intermediate connecting piece, which can be in series, parallel, or a combination thereof. The first segment 311 can be connected (e.g., welded) to the terminal post 110 of the battery cell 100 located at the end to output the electrical energy of the multiple battery cells 100 to the outside. Specifically, the first segment 311 first outputs the electrical energy to the second segment 312, and the end of the second segment 312 directly forms an external power output interface, thereby completing the external output of electrical energy from at least two battery cells 100.

[0069] In this embodiment, the second segment 312 is disposed on the inner side of the side plate 210, and the end of the second segment 312 extends to the output port 211 of the side plate 210. This allows the end of the second segment 312 to be exposed through the output port 211, enabling external electrical connectors to directly connect to the output port 211 and thus achieve external power output. In this embodiment, the external power output interface is formed directly from the end of the output electrode connecting piece, without the need for a connector.

[0070] In some embodiments, the output electrode connector 310 may be an output electrode bar, for example, an aluminum bar.

[0071] In some embodiments, the battery device 1000 includes two output electrode components 300, namely a positive output electrode component and a negative output electrode component.

[0072] In the technical solution of this application embodiment, the end of the second segment 312 of the output electrode connecting piece 310 of the output electrode assembly 300 extends to the output port 211 so that the end of the second segment 312 forms the external output interface of the battery device. This eliminates the need for an adapter, saves the space occupied by the adapter and its components, and thus improves the space utilization of the entire battery device, thereby increasing the energy density of the battery device.

[0073] refer to Figure 5 In some embodiments, a connecting hole 3121 is provided at the end of the second segment 312. (See reference...) Figure 8 A nut 314 is provided at the connection hole 3121. The connection hole 3121 is configured to be electrically connected to an external electrical connector via the nut 314.

[0074] In some embodiments, one end of the second segment 312 is connected to the first segment 311, and the other end of the second segment 312 is provided with a connection hole 3121. (See reference) Figure 5 The end of the connection hole 3121 of the second section 312 protrudes outward relative to the other parts. The outward protrusion here refers to the protrusion towards the side closer to the side plate 210, so that the end can be inserted into the output port.

[0075] Furthermore, a nut 314 is integrated at the connection hole 3121. The nut 314 is specifically located inside the connection hole 3121, that is, on the side closer to the battery cell.

[0076] The output electrode connecting piece in this embodiment has a connecting hole 3121 at its end, and a nut is provided at the connecting hole 3121. This allows for direct electrical connection between the external electrical connector and the end of the second segment 312 via a bolt and nut 314 threaded engagement, simplifying operation and improving installation convenience. Furthermore, by embedding a high-strength nut 314 into the highly conductive output electrode connecting piece, this embodiment effectively balances conductivity and mechanical reliability. The nut 314 has a higher strength than the output electrode connecting piece, enabling it to withstand repeated tightening and loosening, thus improving the operational reliability of the battery device.

[0077] In some embodiments, nut 314 includes a press-fit nut.

[0078] In other words, the nut is permanently fixed to the output pole connecting piece 310 using a press-fitting process.

[0079] The nut 314 in this embodiment is a press-fit nut. The press-fit nut forms an engagement with the output electrode connecting piece through riveting deformation, thereby improving the vibration resistance and further improving the reliability of the battery device.

[0080] refer to Figure 4 In some embodiments, the output electrode assembly 300 further includes an insulating shell 320 sleeved on the outside of the output electrode connector 310. The insulating shell 320 is connected to the side plate 210 and has an opening. The opening is configured to expose the connector hole 3121.

[0081] The insulating shell 320 has an inner cavity and its shape is adapted to the output electrode connection piece 310, thus allowing the insulating shell 320 to be fitted over the outside of the output electrode connection piece 310. (Reference) Figure 4 and Figure 5 The insulating shell 320 is also provided with a connector 370, which is used to connect with the side plate 210. The connector 370 can be an insert nut, which is connected to the side plate 210 by bolts.

[0082] The output electrode connector 310 typically carries high voltage. In this embodiment, the insulating shell 320 is sleeved on the outside of the output electrode connector 310 to insulate and isolate the output electrode connector 310 from the side plate 210, preventing high voltage leakage. Furthermore, the insulating shell 320 is connected to the side plate 210, thereby providing stable support for the output electrode connector 310.

[0083] refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, the output electrode assembly 300 further includes a blocking wall 330. The blocking wall 330 protrudes from the insulating housing 320 and surrounds the opening in the circumferential direction.

[0084] refer to Figure 4 The insulating shell 320 has an opening that exposes the connection hole 3121. The opening is approximately square. Furthermore, a protruding annular blocking wall 330 is provided on the inner edge of the opening of the insulating shell 320. The protruding annular blocking wall 330 provides an electrical barrier to the connection hole 3121, effectively increasing the effective creepage distance between the high-voltage connection hole 3121 and the side plate 210.

[0085] The blocking wall 330 provided on the insulating shell 320 of the output electrode assembly 300 in this embodiment of the application extends the creepage path of current on the surface of the insulating shell 320, effectively increases the creepage distance, thereby reducing the risk of arcing and improving the safety of the battery device.

[0086] In some embodiments, the blocking wall 330 and the insulating shell 320 are integrally formed by injection molding.

[0087] In this embodiment, the blocking wall 330 and the insulating shell 320 are integrally injection molded, effectively avoiding the problem of shortened creepage paths that may be caused by assembly gaps. This helps to improve the integrity and continuity of the insulation barrier between the high-voltage output electrode connecting piece and the side plate, ensuring the consistency of electrical insulation performance. Moreover, integral injection molding can reduce assembly steps in production, effectively avoiding assembly errors caused by assembly, and improving production efficiency and product yield.

[0088] The external electrical connector can be a tab, which is bolted to the output electrode connecting piece 310. To avoid problems caused by insufficient bolt torque, stripped threads, or other manufacturing processes, in some embodiments, the insulating shell 320 is also provided with a first contact resistance detection hole 340 and a second contact resistance detection hole 360 ​​that are isolated from each other. The first contact resistance detection hole 340 is configured to allow the probe to pass through and contact the output electrode connecting piece 310. The second contact resistance detection hole 360 ​​is configured to allow the probe to pass through and contact the external electrical connector.

[0089] This embodiment of the application provides contact resistance detection holes on the insulating shell 320, which lead to the output electrode connecting piece 310 and the external electrical connector, respectively. This allows the probe to be directly inserted into the contact resistance detection holes to measure the resistance, ensuring that the bolt torque of each battery device remains at the same level, thus improving quality control during manufacturing. Furthermore, throughout the entire lifespan of the battery device, regular maintenance and inspection can be performed through these contact resistance detection holes, enabling timely detection and elimination of connection faults caused by loose bolts, effectively improving operational safety.

[0090] As mentioned above, the side plate 210 of this embodiment is provided with an output port so that the end of the output electrode connection piece 310 is exposed to form an external output interface. This output port is open to the outside. Therefore, in order to effectively prevent water and other contaminants from entering the housing from the output port, refer to... Figure 4 In some embodiments, the insulating shell 320 is connected to the side plate 210 and a sealing ring 350 is provided between the inner surfaces of the insulating shell 320 and the side plate 210.

[0091] refer to Figure 4 The insulating shell 320 has a sealing groove on the surface near the side plate 210. The sealing ring 350 is nested in the sealing groove. When the insulating shell 320 is fastened to the side plate by bolts or the like, the sealing ring is squeezed and deformed, filling the assembly gap between the insulating shell 320 and the side plate, thereby forming a reliable sealing barrier between the two.

[0092] The sealing ring can be an O-ring or a custom-shaped sealing ring. Specifically... Figure 4In the illustrated embodiment, the sealing ring is an irregularly shaped sealing ring, comprising a square sealing ring segment extending circumferentially and enclosing the square sealing ring, and a circular sealing ring segment disposed on the outer side of the square sealing ring. The circular sealing ring segment is disposed on the outer circumferential side of the connector 370.

[0093] This embodiment of the application effectively prevents water, dust, and other contaminants from entering the casing from the output port by setting a sealing ring 350, thus effectively improving the operational reliability of the battery device. Furthermore, preventing the intrusion of these contaminants ensures the dryness and cleanliness of the casing interior, guarantees the insulation protection of the high-voltage circuit, avoids safety hazards such as short circuits and arcing caused by condensation or other impurities, and ensures electrical safety.

[0094] As described above, in this embodiment, one end of the output electrode connecting piece 310 is connected to the battery cell 100, and the other end extends to the output port of the side plate 210 and directly forms an external power output interface. During the transportation of the battery device, vibration and other issues can cause relative movement between the two ends of the output electrode connecting piece 310, resulting in stress transmission to the connection between the output electrode connecting piece 310 and the battery cell 100. For example, during welding, stress can be transmitted to the weld seam, causing connection failure. To address this problem, this embodiment proposes that a flexible connecting section be provided between the first segment 311 and the second segment 312 of the output electrode connecting piece 310 to absorb stress. Simultaneously, this application also considers ensuring the current-carrying area of ​​the output electrode connecting piece 310. Based on the above considerations, in some embodiments, refer to... Figure 6 The output electrode connector 310 has a bent structure and includes a bent section 313 disposed between the first section 311 and the second section 312. The bent section 313 includes multiple layers of metal foil 3131.

[0095] The multilayer metal foil 3131 can be formed into an integral structure by diffusion welding. Compared with the solid structure, the bent section 313 formed by the multilayer metal foil 3131 has strong ductility and flexibility. When the second section 312 of the output electrode connecting piece 310 undergoes relative displacement, the stress causes the multilayer metal foil 3131 to undergo flexible and integral deformation. This allows the stress to be dissipated in the bent section 313, preventing the stress from being transmitted to the connection point with the battery cell, thereby improving the connection reliability between the output electrode connecting piece and the battery cell.

[0096] In some embodiments, the bending section 313 is a soft aluminum bar, specifically a 1-series soft aluminum bar.

[0097] In this application embodiment, the first segment of the output electrode connector is connected to the terminal post of the battery cell. In order to improve the strength of the connection between the two, in some embodiments, the first segment 311 includes solid metal.

[0098] The solid metal mentioned here refers to metal material that has been pressed into a thin shape through processes such as rolling and stamping. For example, the solid metal can be integrally formed through a stamping process. Specifically, the first segment 311 can be solid aluminum.

[0099] The first segment 311 of the output electrode connector 310 in this embodiment of the application includes solid metal, which has high strength and can better achieve the connection with the battery cell.

[0100] In some embodiments, the first segment 311 is a 1-series hard aluminum bar. Since the first segment 311 is welded to the terminal post of the battery cell, the use of a 1-series hard aluminum bar has good conductivity, which can effectively reduce resistance and improve current conduction efficiency.

[0101] In other embodiments, the second segment 312 comprises solid metal.

[0102] The second segment 312 needs to be assembled with external electrical connectors. Therefore, the second segment 312 is made of solid metal, which can provide a stronger support surface for assembly and ensure sufficient connection strength and contact pressure.

[0103] In some embodiments, the second segment 312 is a 6-series hard aluminum bar.

[0104] The strength of the output electrode connector in this embodiment is arranged in distinct regions, including a first segment 311 and a second segment 312 located at both ends, and a bent segment 313 disposed between the first segment 311 and the second segment 312. The first segment 311 and the second segment 312 are made of hard aluminum alloy, while the bent segment 313 is made of soft aluminum alloy and has a layered structure. Because the bent segment 313 has a layered structure, to prevent delamination from affecting the welding strength, the bent segment 313 is lap-welded to the first segment 311 and the second segment 312. The welding can be laser welding or friction stir welding.

[0105] In some embodiments, the output electrode assembly 300 further includes an insulating shell 320 sleeved on the outside of the output electrode connecting piece 310. The insulating shell 320 includes an elastic tube 322 sleeved on the outside of the bent section 313.

[0106] The 322 elastic tube can be a heat shrink tubing.

[0107] In this embodiment of the application, by sleeved with an elastic tube 322 on the outside of the bending section 313, the stress concentration problem in the corner bending area during vibration can be reduced, and the cracking problem of the insulating shell 320 can be effectively avoided.

[0108] In some embodiments, the output electrode connector is made of aluminum.

[0109] In other embodiments, this application also provides an energy storage device, including the battery device 1000 described above, which stores electrical energy.

[0110] The following is based on Figures 2 to 8 The structure of a battery device according to a specific embodiment of this application will be described in detail.

[0111] like Figure 2 As shown, the battery device 1000 of this embodiment includes a housing 200 and a plurality of battery cells 100 disposed inside the housing 200. The battery device 1000 of this embodiment can be a battery module. The housing 200 includes four side plates 210 arranged circumferentially. One of the side plates 210 is provided with two output ports 211, which are respectively located at both ends of the side plate 210 and are respectively a positive output port and a negative output port. The output port 211 extends through the thickness direction of the side plate 210 so that the end of the output electrode connecting piece located inside the side plate 210 can be exposed through the output port to realize electrical connection with external electrical connectors.

[0112] like Figure 3 and Figure 4 As shown, the output electrode assembly 300 includes an output electrode connecting piece 310 and an insulating shell 320 disposed outside the output electrode connecting piece 310. The insulating shell 320 includes an injection-molded shell 321 and an elastic tube 322.

[0113] like Figure 5 As shown, the output terminal connector 310 includes a first segment 311, a bent segment 313, and a second segment 312. The first segment 311 is disposed at the top of at least two battery cells 100, and the second segment 312 is disposed on the side of at least two battery cells 100 and located inside the side plate 210. The bent segment 313 has a bent structure for connecting the first segment 311 and the second segment 312 located on different surfaces.

[0114] like Figure 5 As shown, the edge of the first segment 311 is provided with at least one recess 3111. The recess 3111 extends through the thickness direction of the first segment 311, which can improve the stress concentration problem of the first segment 311, thereby reducing the possibility of deformation failure and surface cracking of the first segment 311 under conditions such as transportation and vibration. At the same time, when the current flowing through the first segment 311 is too large, the first segment 311 can melt at the location of the recess 3111, thereby reducing the risk of damage to the battery device due to overload or short circuit, and thus improving the performance of the battery device.

[0115] The second segment 312 includes a main segment 3122 and an end segment 3124 near the side plate 210 relative to the main segment 3122. The end segment 3124 is provided with a connecting hole 3121. The end segment 3124 and the main segment 3122 are connected by an inclined transition segment 3123.

[0116] like Figure 4 , Figure 7 and Figure 8 As shown, the injection-molded shell 321 of this embodiment is provided with a blocking wall 330, a first contact resistance detection hole 340, a second contact resistance detection hole 360, a sealing ring 350 and a connector 370.

[0117] The injection-molded housing 321 has an opening that exposes the connecting hole 3121. Specifically, the opening is a square opening that exposes the end 3124.

[0118] In this embodiment, the battery device directly exposes the end of the output electrode connector to form an external output interface, eliminating the need for a connector adapter. This reduces unnecessary space occupation and improves space utilization. Furthermore, eliminating the need for a connector adapter also reduces the number of plugs and other components that connect to the connector, thus lowering costs.

[0119] Furthermore, such as Figure 6 As shown, in this embodiment, the first segment 311 and the second segment 312 of the output electrode connector 310 are solid metal (hard metal bar), and the bent segment 313 has a layered structure to form a soft metal bar.

[0120] The connecting piece in this embodiment includes a hard metal bar located at both ends and a soft metal bar located between the two hard metal bars. The soft metal bar and the hard metal bar are lap-welded together, which can effectively absorb the relative movement between different parts of the output electrode connecting piece under transportation / vibration conditions and reduce the stress concentration problem in the weld area between the output electrode connecting piece and the battery cell.

[0121] The insulating shell 320 in this embodiment includes an injection-molded shell 321 and an elastic tube 322. By using a composite method of injection molding and elastic tube, the stress concentration problem of the insulating shell 320 in the corner area during vibration can be reduced, which can effectively reduce problems such as shell cracking during vibration.

[0122] By setting a contact resistance detection hole, the contact resistance between the external electrical connector (bar plate) and the output electrode connection plate can be effectively detected after assembly to ensure that the bolts are properly tightened.

[0123] 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 two battery cells (100); The housing (200) has a receiving cavity for accommodating the at least two battery cells (100) and includes a side plate (210) circumferentially enclosing the receiving cavity, the side plate (210) having an output port (211); and The output electrode assembly (300) includes an output electrode connector (310), which includes a first segment (311) and a second segment (312) distributed in its extending direction. The first segment (311) is electrically connected to the at least two battery cells (100), and the end of the second segment (312) extends to the output port (211), and the end of the second segment forms the external power output interface of the battery device.

2. The battery device according to claim 1, characterized in that, The end of the second segment (312) is provided with a connecting hole (3121), and a nut (314) is provided at the connecting hole (3121). The connecting hole (3121) is configured to be electrically connected to an external electrical connector through the nut (314).

3. The battery device according to claim 2, characterized in that, The nut (314) includes a press-fit nut.

4. The battery device according to claim 2, characterized in that, The output electrode assembly (300) also includes an insulating shell (320) sleeved on the outside of the output electrode connecting piece (310), the insulating shell (320) having an opening configured to expose the connecting hole (3121).

5. The battery device according to claim 4, characterized in that, The output pole assembly (300) further includes a blocking wall (330) that protrudes from the insulating shell (320) and surrounds the opening in the circumferential direction.

6. The battery device according to claim 5, characterized in that, The blocking wall (330) and the insulating shell (320) are integrally formed by injection molding.

7. The battery device according to claim 4, characterized in that, The insulating shell (320) is also provided with a first contact resistance detection hole (340) and a second contact resistance detection hole (360) that are isolated from each other. The first contact resistance detection hole (340) is configured to allow the probe to pass through and contact the output electrode connecting piece (310), and the second contact resistance detection hole (360) is configured to allow the probe to pass through and contact the external electrical connector.

8. The battery device according to claim 4, characterized in that, The insulating shell (320) is connected to the side plate (210), and a sealing ring (350) is provided between the inner surface of the insulating shell (320) and the side plate (210).

9. The battery device according to any one of claims 1 to 8, characterized in that, The output electrode connector (310) has a bent structure and includes a bent section (313) disposed between the first section (311) and the second section (312), the bent section (313) including multiple layers of metal foil (3131).

10. The battery device according to claim 9, characterized in that, The first segment (311) comprises solid metal; and / or the second segment (312) comprises solid metal.

11. The battery device according to claim 9, characterized in that, The output pole assembly (300) also includes an elastic tube (322) sleeved on the outside of the bent section (313).

12. The battery device according to claim 9, characterized in that, The output electrode connector is made of aluminum.

13. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 12, wherein the battery device provides electrical energy.

14. An energy storage device, characterized in that, The battery device includes any one of claims 1 to 12, wherein the battery device stores electrical energy.

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