Electrical connection assembly and battery

Abstract

The utility model relates to the connection technical field of battery pack discloses an electric connection assembly and battery, an electric connection assembly, comprising, male plug, be equipped with the center through -hole of axial penetration, the inner wall of center through -hole is equipped with internal thread at least partially, the front end of male plug is equipped with a plurality of axial extension's section groove, forms a plurality of contact lobe that can occur elastic deformation to radial, retaining piece, from front end to rear end include insertion section and thread section in proper order, the outer diameter of insertion section is less than the outer diameter of thread section, the outer diameter of insertion section is less than or equal to the aperture of the center through -hole of male plug at contact lobe, the thread section is equipped with the external thread of matching with the internal thread of male plug, wherein, when the thread section of retaining piece is engaged with the internal thread of male plug, the insertion section of retaining piece is located in the space surrounded by contact lobe.

Description

Technical Field

[0001] This utility model relates to the field of external connection technology for batteries, specifically to an electrical connection component and a battery. Background Technology

[0002] With the rapid development of lithium-ion battery technology, its applications are becoming increasingly widespread, placing higher demands on the connection reliability, charging and discharging efficiency, and lifespan of battery packs. In the electrical connection between battery packs and external devices (such as electrical appliances or charging equipment), plug-in connectors are typically used. One common structure is the mating of a male plug and a female socket.

[0003] In existing technology, a typical male plug employs a structure known as a "basket" or "elastic contact flap." Specifically, the male plug is usually a cylindrical component with multiple elastic contact flaps formed by axial slots at its front end. When the male plug is inserted into the female socket, these contact flaps undergo elastic deformation under radial compression, maintaining contact with the inner wall of the female socket through their own resilience, thereby achieving electrical conductivity.

[0004] However, this connection method, which relies on the elasticity of the contact flaps themselves, reveals the following significant drawbacks in practical applications: Connection failure due to metal fatigue: Battery packs require frequent plugging and unplugging during use. Long-term, repeated radial compression and rebound cause the contact pad roots to gradually lose elasticity due to metal fatigue. When elasticity fails, the contact pads cannot rebound effectively, resulting in a gap between the male plug and female socket, causing poor contact and a sharp increase in contact resistance.

[0005] Increased internal resistance and performance degradation: Increased contact resistance will generate severe Joule heating during high-current charging and discharging, which not only wastes electrical energy and reduces charging and discharging efficiency, but may also cause safety risks due to local overheating, and accelerate the aging of connectors and battery bodies.

[0006] Poor maintainability and shortened lifespan: Once the elastic contact petals of the male plug are permanently deformed due to fatigue, the entire connector usually needs to be replaced as a whole. Local repairs or effective maintenance are not possible, which increases the cost of use and shortens the effective service life of the battery pack. Summary of the Invention

[0007] One of the objectives of this utility model is to provide an electrical connection component and a battery, providing a stable, reliable and maintainable electrical connection structure. When applied to a battery, this helps to ensure that the battery has low contact resistance and high connection reliability throughout its entire life cycle.

[0008] In a first aspect, an embodiment of the present invention provides an electrical connection component, comprising, The male connector has an axially penetrating central through hole, and the inner wall of the central through hole is at least partially provided with internal threads. The front end of the male connector has a plurality of axially extending slots, forming a plurality of contact petals capable of elastic deformation in the radial direction. The retainer includes an insertion section and a threaded section from front end to rear end. The outer diameter of the insertion section is smaller than the outer diameter of the threaded section. The outer diameter of the insertion section is smaller than or equal to the diameter of the central through hole of the male plug at the contact flap. The threaded section is provided with an external thread that matches the internal thread of the male plug. When the threaded section of the retainer engages with the internal thread of the male insert, the insertion section of the retainer is located within the space enclosed by the contact flaps.

[0009] Optionally, a wire bonding position for welding wires is also provided on the outer side of the rear end of the male plug.

[0010] Optionally, the wire bonding position is a radial recess or welding groove located on the outer side of the rear end of the male plug.

[0011] Optionally, the front end of the insertion section of the retainer is provided with a tapered guide section whose outer diameter gradually decreases from back to front.

[0012] Optionally, a screwing part is provided at the rear end of the retainer.

[0013] Optionally, the screwing part is a hexagonal head, a slotted head, a cross-shaped head, or an internal hexagonal hole.

[0014] Optionally, the male plug and / or the retainer are made of a conductive metal material.

[0015] Optionally, the male plug and / or the retainer are copper components.

[0016] Secondly, the present invention provides a battery comprising: case, The battery body is encapsulated within the housing, and at least one female connector is provided on the housing. Each female connector is electrically connected to either the positive or negative terminal of the battery body. At least one of the above-described electrical connection components, when the front end connector of the male plug of the electrical connection component is inserted into the female plug, the retainer of the electrical connection component is inserted into the central through hole of the female plug, and the threaded section is screwed into the internal thread of the male plug: The insertion section of the retainer is located within the space enclosed by the contact petals, and it spreads each of the contact petals apart so that they are tightly attached to the inner wall of the female insert.

[0017] Optionally, the wires connecting to an external battery or electrical device are soldered to the wire connection points of the male plug.

[0018] As can be seen from the above, the male and female terminals of the plug in this embodiment are made of tellurium bronze, which has high conductivity. Compared with traditional brass terminals, when the same current flows through, according to Joule's law (P=I²R), the resistance (R) of tellurium bronze terminals is significantly lower, thus greatly reducing the heat (P) generated. This helps to reduce the risk of overheating and fire caused by large current flowing through the terminals to be connected. Furthermore, while maintaining high conductivity, tellurium bronze has better strength, hardness, and machinability than pure copper. This makes the fabrication of the male and female terminals more convenient and reliable, ensuring that the elastic contact portion on the male terminal maintains good elastic recovery ability after repeated insertion and removal, which helps to extend the service life of the plug. The plug in this embodiment achieves a stable electrical connection and strong resistance to vibration and loosening through the interference fit between the elastic contact portion on the outer periphery of the male terminal's front insertion section and the tubular structure of the female terminal's front insertion section. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention.

[0020] Figure 1 , 2 A three-dimensional structural diagram of an electrical connection component provided in an embodiment of this utility model; Figure 3 , 4 Figure 5 shows the front view, left view, and bottom view of the assembly structure of an electrical connection component provided in an embodiment of this utility model; Figure 6 A schematic axial cross-sectional view of an electrical connection assembly provided in an embodiment of this utility model; Figure 7 , 8 9 are schematic diagrams of the front view, top view, and bottom view of a public plug-in provided in an embodiment of this utility model; Figure 10 A schematic diagram of the main structure of a retaining member provided in an embodiment of this utility model; Figure 11 A schematic diagram of the structure of a battery provided in an embodiment of this utility model; Figure 12 The present invention provides an embodiment of inserting a male plug with an external wire soldered on it into... Figure 11 A schematic diagram of the power interface of the battery shown. Figure 13 The retainer is inserted as provided in the embodiment of this utility model. Figure 12 The diagram shows the structure of the public plug-in. Figure 14The retaining member provided for the embodiments of this utility model is from Figure 13 The diagram shows the structure of the plug-in component being pulled out. Figure 15 The public plug-in provided for the embodiments of this utility model is from Figure 14 The diagram shows the structure of the battery with its power interface disconnected.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1: Battery; 2: Retaining element; 21: Insertion section; 22: Threaded section; 23: Tapered guide section; 24: Tightening part; 3: Male insert; 31: Center through hole; 32: Internal thread; 33: Groove; 34: Contact flap; 35: Wire bonding position; 4: Mother plugin; 5: Wire. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0024] Examples of embodiments of the present invention are shown in the accompanying drawings in a detailed description below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0025] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention 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 limiting the present invention.

[0026] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] See Figures 1-15 .

[0029] This utility model provides an electrical connection assembly and a battery including the assembly. The electrical connection assembly actively and controllably expands the contact petals 34 of the male plug 3 to undergo radial elastic deformation through a separable retainer 2 with a stepped outer diameter, thereby establishing a stable, low-resistance, and reliable electrical connection when mated with the female plug 4.

[0030] Combination Figures 1 to 6 As shown, the electrical connection assembly in this embodiment mainly consists of two parts: the male plug 3 and the retainer 2.

[0031] The male connector 3 has an axially penetrating central through hole 31. The inner wall of this central hole is at least partially provided with internal threads 32. These internal threads 32 may cover the entire hole wall or be located only in the rear portion of the hole wall. The front end portion of the male connector 3 is defined as the front insertion section, which is divided into several independent contact flaps 34 capable of radial elastic deformation by machining multiple axially extending grooves 33. The presence of these grooves 33 provides the necessary deformation space for the radial expansion and contraction of the contact flaps 34.

[0032] The retainer 2 comprises an insertion section 21 and a threaded section 22 from front to rear. The outer diameter of the insertion section 21 is smaller than that of the threaded section 22. Furthermore, the outer diameter of the insertion section 21 is designed to be smaller than or equal to the diameter of the central through hole 31 of the male plug 3 at the contact flap 34. When the front end of the male plug 3 is inserted into the female plug 4, the contact flap 34 is compressed towards the center by the inner wall of the female plug 4, resulting in elastic deformation. At this time, the connection mainly relies on the rebound force of the contact flap 34 itself, which is similar to that of a conventional plug connector.

[0033] As attached Figure 6 and attached Figure 13As shown, the threaded section 22 of the retainer 2 has an external thread that matches the internal thread 32 of the male plug-in 3. When the threaded section 22 of the retainer 2 engages with the internal thread 32 of the male plug-in 3, the insertion section 21 of the retainer 2 is located within the space enclosed by the contact petals 34. Since the outer diameter of the insertion section 21 is smaller than that of the threaded section 22, the engagement process is a gradual process of opening the contact petals 34. This allows the contact petals 34 to be strongly and uniformly radially opened, providing a basis for a tight fit with the female plug-in 4. Its beneficial effect is that the preload generated by the mechanical thread replaces the contact pressure that relies solely on material elasticity, solving the contact failure problem caused by metal fatigue and ensuring the long-term reliability of the connection.

[0034] As illustrated in this embodiment, a wire bonding position 35 for soldering the wire 5 is also provided on the outer side of the rear end of the male plug 3. In application, the external wire 5 (used to connect to external electrical equipment or to be connected in series or parallel with other batteries 1) is reliably soldered to the wire bonding position 35.

[0035] In a preferred embodiment, the wire bonding point 35 can be an annular radial recess or a specific welding groove, the purpose of which is to provide a stable and reliable connection point for the welding of the external conductor 5. (See attached diagram) Figure 7 , 9 As shown, this structure increases the welding contact area and can better accommodate and position the solder, making the solder joint stronger and more reliable.

[0036] As a preferred embodiment, a tapered guide section 23 with an outer diameter that gradually decreases from back to front can also be provided at the front end of the insertion section 21 of the retainer 2. This structure can guide and center the insertion in the initial stage, making the assembly smoother. (See attached diagram) Figure 10 As shown, this structure can play a good guiding and centering role in the initial stage of inserting the retainer 2 into the male plug 3, avoiding jamming and making the assembly process smoother and more efficient.

[0037] In a preferred embodiment, a tightening part 24 is also provided at the rear end of the retainer 2. The tightening part 24 can be a common form such as a hexagonal head, flathead, Phillips head, or internal hexagonal hole. This design allows the user to tighten the retainer 2 using standard tools (such as wrenches and screwdrivers), greatly improving the convenience of operation and the accuracy of torque application.

[0038] The retainer 2 is used after the male plug 3 is inserted into the female plug 4. The operator uses a tool to turn the turning part 24 to screw the threaded section 22 of the retainer 2 into the internal thread 32 of the male plug 3. As the retainer 2 is screwed in, its larger outer diameter threaded section 22 and the rear part of the insertion section 21 gradually enter and expand the space enclosed by the contact flap 34. Since the outer diameter of the insertion section 21 is smaller than that of the threaded section 22, this is a gradual expansion process, which can smoothly and controllably apply radial force.

[0039] As attached Figures 1 to 6 and appendix Figure 13 As shown, when the retainer 2 is fully screwed into place, its insertion section 21 is securely located within the space enclosed by the contact petals 34. At this time, each contact petal 34 is forcefully pushed outward radially by the retainer 2, thereby being tightly pressed between the outer wall of the retainer 2 and the inner wall of the female insert 4.

[0040] In application, the external active application of the retainer 2 to each contact petal 34 provides uniform radial pressure, ensuring a large-area, tight contact between the contact petal 34 and the inner wall of the female plug 4. This significantly reduces contact resistance, energy loss and heat generation, and improves charge and discharge performance.

[0041] As can be seen from the above, in the electrical connection assembly of this embodiment, the connection force no longer relies solely on the elasticity of the male plug 3 material, but mainly originates from the precisely controllable mechanical preload generated by the threaded pair of the retainer 2. This effectively avoids the decrease in contact pressure and connection failure caused by metal fatigue, greatly improving connection reliability.

[0042] The male connector 3 and / or retainer 2 are made of a conductive metal material. Preferably, the conductive metal material is copper or its alloy. Copper has excellent conductivity and machinability, making it an ideal material for manufacturing this electrical connection assembly, ensuring low-loss current transmission.

[0043] Combined with appendix Figures 11 to 15 As shown, this embodiment also provides a battery 1 that uses the above-described electrical connection components.

[0044] The battery 1 includes a casing and a battery body encapsulated within the casing. At least one female connector 4 is provided on the casing, and the at least one female connector 4 is electrically connected to either the positive or negative terminal of the battery body. The battery 1 includes any of the aforementioned electrical connection components. The male connector 3 is the main component of this assembly that directly plugs into and conducts electricity with the female connector 4. The retaining member 2 is an important auxiliary functional component used to lock the male connector 3 from within and enhance its connection state.

[0045] In use, insert the male connector 3 of the aforementioned electrical connection assembly (with the external wire 5 already soldered to its solder connection position 35) into the female connector 4 on the battery 1 casing. Then, as shown in the attached diagram... Figure 13As shown, screw retainer 2 into male plug 3 and tighten. Finally, as shown in the attached diagram. Figure 9 Following the aforementioned principle, the contact flap 34 is stretched open and pressed tightly against the inner wall of the female plug 4, forming an excellent electrical connection.

[0046] This design is particularly suitable for battery applications requiring frequent plugging and unplugging or high reliability, such as power tools, outdoor power supplies, and connections between battery modules in electric vehicles. It ensures that the external electrical interfaces of the battery maintain extremely low contact resistance and extremely high mechanical reliability throughout its entire lifespan, thereby enhancing the overall competitiveness of the product.

[0047] As attached Figure 14 , 15 As shown, when disconnection is required, simply unscrew the retainer 2, and the contact flap 34 will return to its freely retracted state, allowing the male connector 3 to be easily pulled out. If the contact flap 34 is damaged due to long-term use, the male connector 3 can be replaced separately, reducing maintenance costs and extending the service life of the entire connection system.

[0048] As attached Figure 13 As shown, when the front end of the male plug 3 of the electrical connection assembly is inserted into the female plug 4, and the retainer 2 is screwed into place with the male plug 3, the insertion section 21 of the retainer 2 is located within the space enclosed by the contact petals 34, and it spreads each contact petal 34 apart, making them tightly adhere to the inner wall of the female plug 4. This state establishes a strong mechanical lock and an excellent electrical contact path between the male plug 3 and the female plug 4. Its beneficial effect is a significant improvement in the connection reliability and durability of the external interface of the battery 1, making it particularly suitable for scenarios requiring frequent insertion and removal or vibration environments.

[0049] As an illustration of this embodiment, the wire 5 connected to the external battery 1 or the electrical device is soldered to the solder wire connection position 35 of the male plug 3.

[0050] For example, in large outdoor power supplies or energy storage base stations, the battery 1 can be connected to an inverter, lighting equipment or other DC loads via wires 5 soldered to the plug-in 3, providing a stable, low-resistance power output port.

[0051] Alternatively, in battery systems requiring higher voltage or greater capacity, multiple batteries 1 can be flexibly combined by soldering wires 5 to their respective male connectors 3. For example, soldering wire 5 of battery A (positive male connector 3) to wire 5 of battery B (negative male connector 3) achieves series connection to increase voltage; connecting positive terminals to positive terminals and negative terminals to negative terminals of multiple batteries 1 separately achieves parallel connection to expand capacity. This design greatly facilitates the integration of battery 1 modules.

[0052] As can be seen from the above, by directly welding the wire 5 to the structurally sound male plug 3, and combining it with the aforementioned reliable plug-in structure, the battery 1 ensures that the entire external electrical circuit has extremely high connection integrity and stability in complex application scenarios.

[0053] The above embodiments do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. An electrical connection assembly, characterized by include, The male plug has an axially penetrating central through hole, and the inner wall of the central through hole is at least partially provided with internal threads. The front end of the male plug has a plurality of axially extending slots, forming a plurality of contact petals that can undergo radial elastic deformation. The retainer includes an insertion section and a threaded section from front end to rear end. The outer diameter of the insertion section is smaller than the outer diameter of the threaded section. The outer diameter of the insertion section is smaller than or equal to the diameter of the central through hole of the male plug at the contact flap. The threaded section is provided with an external thread that matches the internal thread of the male plug. When the threaded section of the retainer engages with the internal thread of the male insert, the insertion section of the retainer is located within the space enclosed by the contact flaps.

2. The electrical connection assembly according to claim 1, characterized in that, A wire bonding position for welding wires is also provided on the outer side of the rear end of the male plug.

3. The electrical connection assembly according to claim 2, characterized in that, The wire bonding position is a radial recess or welding groove located on the outer side of the rear end of the male plug.

4. The electrical connection assembly according to claim 1, characterized in that, The front end of the insertion section of the retainer is provided with a tapered guide section whose outer diameter gradually decreases from back to front.

5. The electrical connection assembly according to claim 1, characterized in that, A screwing part is also provided at the rear end of the retaining member.

6. The electrical connection assembly according to claim 5, characterized in that, The screwing part is a hexagonal head, a slotted head, a cross-shaped head, or an internal hexagonal hole.

7. The electrical connection assembly according to claim 1, characterized in that, The male plug and / or the retainer are made of conductive metal material.

8. The electrical connection assembly according to claim 7, characterized in that, The male plug and / or the retainer are made of copper.

9. A battery, characterized by include: case, The battery body is encapsulated within the housing, and at least one female connector is provided on the housing. Each female connector is electrically connected to either the positive or negative terminal of the battery body. At least one electrical connection assembly according to any one of claims 1 to 8, wherein when the front end connector of the male plug of the electrical connection assembly is inserted into the female plug, the retainer of the electrical connection assembly is inserted into the central through hole of the female plug, and the threaded section engages with the internal thread of the male plug: The insertion section of the retainer is located within the space enclosed by the contact petals, and it spreads each of the contact petals apart so that they are tightly attached to the inner wall of the female insert.

10. A battery according to claim 9, characterized in that, The wires that connect to the external battery or electrical equipment are soldered to the solder joint of the male plug.

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