Battery and spring jumper wire

Abstract

The utility model relates to the connection technical field of battery pack discloses a kind of battery and spring adapter cord, spring adapter cord, for connecting battery pack and electric equipment, it includes: battery end connector, for with the discharge output end of the battery pack Electric connection;Device end connector, for with the power input end of the electric equipment Electric connection;And spring connection wire harness, including at least two conducting wires, each the conducting wire is the stretchable spiral spring shape with the insulating layer of outer periphery cladding, two ends of each the conducting wire are respectively with the electric connection on the battery end connector, the connection end on the device end connector Electric connection;Wherein, the spring connection wire harness is configured to be in natural contraction state in natural state, under the action of external force, it can be stretched to extend connection distance, the cross-sectional area of each the conducting wire is configured to be able to withstand the discharge current of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery connection technology, specifically to a battery and spring adapter cable. Background Technology

[0002] Lithium-ion batteries, due to their high energy density and long cycle life, have been widely used in power tools, garden tools, outdoor energy storage devices, electric vehicles, and other portable electronic devices. As application scenarios continue to expand, the environments in which battery packs are used are becoming increasingly complex and varied.

[0003] Currently, battery packs are typically connected to electrical devices via fixed-length output cables. This connection method has several inherent drawbacks in practical applications: Cables are vulnerable and pose safety hazards: During frequent plugging and unplugging or equipment movement, cables, especially at the joint base, are repeatedly bent. Long-term stress concentration can easily lead to fatigue fracture of the internal conductors or wear of the external insulation layer. For battery packs with high current discharge, cable damage not only affects the stability of power transmission but may also cause serious safety accidents such as short circuits, arcing, and overheating.

[0004] Cable tangling and inconvenience in organization: To accommodate devices at different distances, battery packs are often equipped with relatively long cables. These excessively long cables are prone to tangling and knotting when not in use, causing great inconvenience in storage and organization, and affecting the user experience.

[0005] Inconvenient to use and prone to accidents: When moving equipment, excessively long cables dragging on the ground are easily stepped on or caught in the moving parts of the equipment (such as wheels and tracks), which may not only damage the cables and interfaces, but also cause the equipment to tip over or be damaged.

[0006] Increased weight and size: The excessively long cable undoubtedly increases the overall weight and size of the battery pack, which goes against the design trend of portable and lightweight devices. Summary of the Invention

[0007] One of the objectives of this utility model is to provide a spring adapter cable for connecting a battery and an electrical device. By using a retractable spring wire harness and combining it with a wire cross-sectional area suitable for the battery pack discharge current, it can dynamically adapt to the connection distance, effectively buffer the insertion and pulling stress, thereby extending the cable life, avoiding tangling, and improving the safety and convenience of use.

[0008] One of the objectives of this utility model embodiment is to provide a battery. By integrating the aforementioned spring adapter cable, the battery optimizes the overall structure, enabling the battery pack to have better reliability, portability, and user experience when facing complex usage environments.

[0009] In a first aspect, the present invention provides a spring adapter cable for connecting a battery pack to an electrical device, comprising: A battery terminal connector for electrically connecting to the discharge output terminal of the battery pack; A device-side connector for electrically connecting to the power input terminal of the electrical equipment; and The spring-loaded wiring harness includes at least two conductors, each conductor being a retractable helical spring with an insulating layer covering its outer periphery, and the two ends of each conductor being electrically connected to the battery connector and the connection end on the device connector, respectively. The spring connecting harness is configured to be in a naturally contracted state under natural conditions, and can be stretched under external force to extend the connection distance. The cross-sectional area of ​​each conductor is configured to withstand the discharge current of the battery pack.

[0010] Optionally, the battery-side connector and / or the device-side connector are male plugs, including an insulating housing with its opening opposite to the connecting wire harness. At least two male plugs are fixed inside the insulating housing. One end of each of the copper male plugs is a connector for plugging into the female plug at the opposite end, located inside the opening of the insulating housing, and the other end is electrically connected to the corresponding wire.

[0011] Optionally, each of the aforementioned public plugins includes: The first plug-in includes: an axially arranged connector segment, wherein a limit structure is provided on the connector segment; An elastic contact element, axially sleeved onto the insertion segment by the limiting structure, is formed by winding a metal sheet and has a gap extending axially. The elastic contact member has a plurality of axially extending grooves at its axial center, forming a plurality of axially distributed lobes that can elastically deform radially.

[0012] Optionally, the connector segment of the first male plug is a solid cylinder.

[0013] Optionally, the first male plug and the ring part are copper parts or copper alloy parts, respectively.

[0014] Optionally, the battery connector and / or the device connector are female plugs. The female plug-in includes an insulating base and at least two conductive female plug-ins fixed in the insulating base body; Each of the conductive female plugs includes a sleeve portion for inserting the male plug at the opposite end, and a connection portion electrically connected to the corresponding wire.

[0015] Optionally, the sleeve portion of the conductive female plug is a blind hole structure with a closed rear end, and the connecting portion is located outside the closed end of the sleeve portion.

[0016] Optionally, the conductive female plug-in is a copper part or a copper alloy part.

[0017] Secondly, the present invention provides a battery. The battery itself is equipped with a discharge port. In any of the above-described spring adapter cables, the battery end connector of the spring adapter cable is detachably or fixedly electrically connected to the discharge interface, and the device end connector of the spring adapter cable is used for electrical connection to the power input interface of the electrical device.

[0018] Optionally, the battery body is further provided with a balancing charging harness, and a connector is provided at the end of the balancing charging harness. As can be seen from the above, the elasticity of the spring harness in this embodiment effectively buffers tensile and bending stresses from all directions during use, reducing physical damage to the wires, especially at the connector root, and extending service life. Furthermore, the spring harness automatically retracts when not in use, fundamentally solving the problem of wire tangling and knotting, making it easier to organize and store. Moreover, compared to applications using fixed long cables, the spring adapter of this embodiment avoids the risk of wires being caught in the equipment, reducing the overall dragging burden and improving safety and convenience. 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 the spring adapter cable provided in the embodiment of this utility model when it is in a compressed state; Figure 3 , 4 Left and right view structural schematic diagrams of the spring adapter cable provided in the embodiment of this utility model; Figure 5 , 6 An exploded view of the spring adapter cable provided in an embodiment of this utility model; Figure 7 A schematic diagram of the assembly structure of the spring adapter cable, battery pack, and electrical equipment provided in the embodiments of this utility model; Figure 8 This is a schematic diagram of the connection structure between the spring adapter cable and the battery pack provided in an embodiment of the present utility model; Figure 9A schematic diagram of the connection structure between the spring adapter cable and the battery pack and electrical equipment provided in the embodiment of this utility model.

[0021] 1: Battery connector; 11: Insulating housing; 12: Male connector; 13: Connector segment; 14: Annular shoulder; 15: Elastic contact element; 16: Lobe; 17: Gap; 2: Device-side connector; 21: Insulating base; 22: Female plug-in; 3: Spring-loaded connecting wire harness; 4: Battery; 41: Discharge cable; 42: Discharge interface; 43: Balance charging harness; 44: Balance charging connector; 6: Electrical equipment. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] refer to Figures 1-9 As shown.

[0028] The first embodiment of this utility model provides a spring adapter cable. This spring adapter cable is mainly used to connect battery pack 4 and electrical equipment 6, and it mainly includes three parts: a battery pack 4 end connector 1, an equipment end connector 2, and a spring connecting wire harness 3 connecting the two.

[0029] The spring connecting harness 3 consists of at least two wires, at least one of which serves as the positive terminal "+" and at least the other as the negative terminal "-". It may include, but is not limited to, wires that serve other functions.

[0030] Each wire is a metal wire with an outer insulating layer. The cross-sectional area of ​​the metal conductor of each wire is configured according to the discharge current of the four battery groups to be connected, ensuring that the wire can safely and stably carry the current of the four battery groups during normal operation and even peak operation, and avoid overheating and damage due to overcurrent.

[0031] Each conductor is manufactured as a retractable helical spring, so that the entire bundle is in a tightly contracted state in its natural state (i.e., when no external force is applied), such as... Figure 1 and Figure 2 As shown, it is short and compact overall; however, when it needs to connect to devices at greater distances, it can be stretched under external force (see [reference]). Figure 7 , 9 This extends the connection distance, and the harness will automatically spring back to its retracted state after the external force is removed when the harness is no longer in use.

[0032] The two ends of each wire are electrically connected to the corresponding connection ends on the battery 4-end connector 1 and the device end connector 2, respectively, to achieve electrical transfer.

[0033] As can be seen from the above, the elasticity of the spring harness in this embodiment effectively buffers tensile and bending stresses from all directions during use, reducing physical damage to the wires, especially at the connector root, and extending service life. Furthermore, the spring harness automatically retracts when not in use, fundamentally solving the problem of wire tangling and knotting, making it easier to organize and store. Moreover, compared to applications using fixed long cables, the spring adapter of this embodiment avoids the risk of wires being caught in the equipment, reducing the overall dragging burden and improving safety and convenience.

[0034] This is a further refinement of the specific forms of the battery 4-terminal connector 1 and the device 4-terminal connector 2 in this embodiment. At least one or both of the battery 4-terminal connector 1 and the device 4-terminal connector 2 can be implemented as male connectors.

[0035] This embodiment uses the battery 4-terminal connector 1 as a female connector for illustration, but it is not limited to this.

[0036] As an alternative implementation, the battery 4-end connector 1 and the device end connector 2 can also be implemented as female connectors, or the battery 4-end connector 1 and the device end connector 2 can each adopt a different configuration of one male and one female, all of which fall within the protection scope of this utility model.

[0037] This embodiment also provides a specific structure for a female connector, see [link]. Figure 5 , 6 As shown, it includes an insulating housing 11 with its opening facing away from the spring connecting wire harness 3. An insulating base 21 at the opposite end is inserted through the opening of the insulating housing. Inside the insulating housing 11, at least two conductive male plugs 12 are fixed (at least one serving as a positive power supply "+", and at least the other as a negative power supply "-"). One end of each male plug 12 forms a connector for mating with a female plug 22 at the opposite end (e.g., on the battery 4 or the device), and this connector is located inside the opening of the insulating housing 11. The other end of the male plug 12 is electrically connected to the corresponding wire in the spring connecting wire harness 3 (e.g., by welding, crimping, etc.).

[0038] Further, refer to Figure 5 and Figure 6 This implementation also provides an optimized implementation structure for the male plug-in 12 to improve its contact reliability and insertion / removal life.

[0039] The male plug-in 12 includes a first male plug-in 12, which has an axially arranged insertion section 13 and a limiting structure (e.g., two annular shoulders 14 or slots axially spaced at a predetermined distance) on the insertion section 13. The male plug-in 12 also includes an elastic contact 15. This elastic contact 15 is formed by winding a metal sheet (such as phosphor bronze) with good elasticity and conductivity along its axis. During winding, the axial head edge and axial tail edge of the metal sheet are not fixedly connected, forming a closed cylindrical structure with a hollow axis. As an illustration of this embodiment, the axial head edge and axial tail edge of the metal sheet may contact but not be tightly connected, or they may not contact each other, even if there is a predetermined gap between them, thus forming an axially extending gap 17 on the cylindrical structure. In the axial middle of the cylindrical structure, multiple axially extending grooves are formed by machining, which divide the metal sheet into multiple lobes 16 capable of independent radial elastic deformation. Referring to the figure, this embodiment uses a rectangular groove as a schematic, but it is not limited to this and can also be other axially extending irregular strip shapes. Since the elastic contact 15 in this embodiment is a ring structure with its ends not fixedly connected, it can be adjusted according to the outer diameter of the insertion section 13 of the first male plug 12 being fitted, increasing or narrowing the inner diameter of the elastic contact 15, which facilitates fitting and also makes it easy to replace the elastic contact 15, ensuring the tightness and reliability of the connector.

[0040] During assembly, the elastic contact 15 is fitted onto the insertion segment 13 of the first male plug 12. The limiting structure on the insertion segment 13 is used to axially fix the elastic contact 15. Referring to the figure, the elastic contact 15 is axially limited to the axial space between the two annular shoulders 14 on the plug. As an illustration of this embodiment, the distance between the two annular shoulders 14 can be equal to the length of the elastic contact 15 in its natural state, so that it is completely and tightly abutting against the two annular shoulders 14; or, but not limited to, the distance between the two annular shoulders 14 can be designed to be slightly greater than the length of the elastic contact 15 in its natural state, so that the two ends of the elastic contact 15 have a certain narrow gap with the two annular shoulders 14, so that it can be slightly elastically extended axially. In application, when the male plug 12 of this embodiment is inserted into the female plug 22 at the opposite end, these petals 16 are squeezed by the outer wall of the female plug 22, and each petal 16 undergoes elastic deformation inward. Thus, each petal 16 always maintains a continuous and stable contact pressure on the inner wall of the female plug 22, thereby improving the tightness of the connection and improving the reliability of the connection.

[0041] As can be seen from the above, the petal 16 assembly of this embodiment forms an elastic structure with multiple points of contact with the female plug-in 22, ensuring a large-area, low-resistance electrical connection between the male plug-in 12 and the female plug-in 22. This is particularly suitable for high-current transmission scenarios and can effectively reduce contact point heating and power loss. In addition, the elastic contact 15 of this embodiment can elastically buffer the mechanical impact during the insertion and removal process, improving the mechanical life and electrical reliability of the connector. As an alternative, the elastic contact 15 can also be manufactured by other processes such as stamping and etching.

[0042] As an illustration of this embodiment, a solid cylinder may be used as the insertion segment 13 of the first male plug 12, but is not limited to. This solid structure has higher mechanical strength, can better support the external elastic contact 15, withstand frequent insertion and extraction forces, and is beneficial to reduce internal resistance and reduce heat generation at the connection end.

[0043] Furthermore, in this embodiment, the first male plug 12 and the elastic contact 15 are preferably made of copper or a copper alloy (such as brass, phosphor bronze, or tellurium bronze), which have excellent conductivity. Copper alloys provide the elasticity and durability required for the elastic contact 15 while ensuring conductivity. Alternatively, their surfaces can be treated with silver plating, gold plating, etc., to further improve corrosion resistance and reduce contact resistance.

[0044] As an illustration of this embodiment, the present invention also provides a specific implementation of a male connector, wherein at least one of the battery 4-end connector 1 and the device end connector 2 can be implemented as a female connector.

[0045] This embodiment uses a male connector as an example for illustration, but it is not limited to this.

[0046] like Figure 5 and Figure 6 As shown, the male connector includes an insulating base 21 and at least two conductive female plugs 22 fixed within the insulating base 21. Each female plug 22 includes a sleeve portion and a connecting portion. The sleeve portion is used for the insertion of the male plug 12 at the opposite end to form an electrical connection; the connecting portion is electrically connected to the corresponding wire in the spring connecting wire harness 3.

[0047] In a further optimized embodiment, the sleeve portion of the female plug-in 22 can be implemented as a blind hole structure with a closed rear end. This means that its end facing the interior of the insulating base 21 is closed, while the connecting portion (e.g., a soldering shank) is located outside this closed end. This structure can effectively prevent solder from flowing into the sleeve during wire soldering, thereby avoiding affecting the normal insertion and contact performance of the male plug-in 12. Furthermore, the blind hole mechanism helps improve the moisture and dust resistance of the female plug-in 22.

[0048] In addition, the conductive female plug-in 22 in this embodiment is preferably made of copper or copper alloy to ensure good conductivity and machinability.

[0049] refer to Figures 7 to 9 This utility model also provides a battery 4. The battery 4 includes a battery body with a discharge port 42; or a shorter discharge wire 41 with a discharge port 42 at the end of the discharge wire 41. The battery 4 in this embodiment is also equipped with a spring adapter cable as described above.

[0050] In this embodiment, the battery 4-end connector 1 of the spring adapter cable can be detachably (e.g., plug-and-play) electrically connected to the discharge port 42 on the battery body. This method offers high flexibility, as the spring adapter cable can be used as an optional accessory to connect the battery pack's discharge port 42 to the power input port of a distant electrical device 6. Alternatively, it can be electrically connected in a fixed manner (e.g., directly soldered or screwed to the battery casing), making it an integral part of the battery 4 and improving overall integrity.

[0051] As can be seen from the above, by systematically integrating the spring adapter cable with the battery pack 4, the battery 4 provided by this utility model possesses all the aforementioned advantages of the spring adapter cable, including long cable life, convenient storage, and safe use, which greatly enhances the product's adaptability in complex application environments and improves the user experience.

[0052] like Figure 7 and Figure 9 As shown, in this embodiment, in addition to the main discharge interface 42 and spring adapter cable, the battery body may also be provided with a balancing charging harness 43. A balancing charging connector 44 is provided at the end of the balancing charging harness 43. The balancing charging connector 44 integrates charging terminals, voltage sampling terminals, and communication signal terminals, etc., for connecting to an external charger to achieve balanced charging of each cell within the battery group 4. This forms a fully functional battery system solution 4.

[0053] The above are merely preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A spring-loaded adapter cable for connecting a battery pack to an electrical device, characterized in that, include: A battery terminal connector for electrically connecting to the discharge output terminal of the battery pack; A device-side connector for electrically connecting to the power input terminal of the electrical equipment; as well as The spring-loaded wiring harness includes at least two conductors, each conductor being a retractable helical spring with an insulating layer covering its outer periphery, and the two ends of each conductor being electrically connected to the battery connector and the connection end on the device connector, respectively. The battery connector and / or the device connector are male plugs. Each male plug includes an insulating housing with the opening of the insulating housing facing away from the connecting wire harness. At least two male plugs are fixed inside the insulating housing. One end of each male plug is a connector for plugging into the female plug at the opposite end, located inside the opening of the insulating housing, and the other end is electrically connected to the corresponding wire. Each first male plug and an elastic contact member are provided. The first male plug includes: an axially arranged insertion segment, the insertion segment having a limiting structure, the elastic contact member being axially sleeved onto the insertion segment through the limiting structure, the elastic contact member being formed by winding a metal sheet, having a gap extending axially, and having a plurality of axially extending grooves at the axial center of the elastic contact member, forming a plurality of axially distributed lobes capable of radial elastic deformation. The spring connecting harness is configured to be in a naturally contracted state under natural conditions, and can be stretched under external force to extend the connection distance. The cross-sectional area of ​​each of the wires is configured to withstand the discharge current of the battery pack.

2. The spring adapter cable according to claim 1, characterized in that, The connector section of the first male plug is a solid cylinder.

3. The spring adapter cable according to claim 1, characterized in that, The first male plug and the ring part are copper parts or copper alloy parts, respectively.

4. The spring adapter cable according to claim 1, characterized in that, The battery connector and / or the device connector are female plugs. The female plug-in includes an insulating base and at least two conductive female plug-ins fixed in the insulating base; Each of the conductive female plugs includes a sleeve portion for inserting the male plug at the opposite end, and a connection portion electrically connected to the corresponding wire.

5. The spring adapter cable according to claim 4, characterized in that, The sleeve portion of the conductive female plug is a blind hole structure with the rear end closed, and the connecting portion is located outside the closed end of the sleeve portion.

6. The spring adapter cable according to claim 4, characterized in that, The conductive female plug is a copper part or a copper alloy part.

7. A battery, characterized in that, include, The battery itself is equipped with a discharge port. The spring adapter cable according to any one of claims 1 to 6, wherein the battery end connector of the spring adapter cable is detachably or fixedly electrically connected to the discharge interface, and the device end connector of the spring adapter cable is used for electrical connection to the power input interface of the electrical device.

8. The battery according to claim 7, characterized in that, The battery body is also provided with a balance charging harness, and a connector is provided at the end of the balance charging harness.

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