Lithium battery protection board facilitating wiring

Abstract

This utility model discloses a lithium battery protection board that facilitates wiring, relating to the technical field of lithium battery protection boards. It includes a lithium battery protection board body, multiple first connecting pieces, and second connecting pieces. The surface of the lithium battery protection board body has multiple through holes. Each first connecting piece has two sets of hollow soft sleeves inside. An elastic washer is fixedly installed on the outer side of each hollow soft sleeve. A support sleeve is slidably installed at the end of each hollow soft sleeve. A conical locking sleeve is fixedly installed inside each hollow soft sleeve. The two ends of the elastic washer are aligned with the lithium battery protection board body and the first connecting pieces, respectively. On the one hand, the expansion of the hollow soft sleeve and the elastic washer can radially fix the internal structure of the first and second connecting pieces. On the other hand, the elastic deformation of the elastic washer can compensate for height deviation and position error in the battery cell assembly, ensuring that the connecting piece and the battery cell terminal are always tightly fitted, avoiding poor contact.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery protection board technology, and in particular to a lithium battery protection board that is easy to wire. Background Technology

[0002] Currently, existing lithium battery protection boards (such as patent publication number: CN223285139U) disclose a lithium battery protection board, including a protection board body and multiple first mounting blocks mounted on the battery. The protection board body is placed on top of the multiple first mounting blocks, and each of the multiple first mounting blocks has a fixedly connected insertion rod. The upper surface of the protection board body has multiple mounting holes, and the multiple insertion rods pass through the multiple mounting holes respectively. Each of the multiple insertion rods has a first groove on one side. The upper surface of the protection board body has multiple guide frames fixedly connected, and a slide is slidably connected to the outer side of two adjacent guide frames. The slide is engaged with the first groove, eliminating the need to use screws to fix the protection board, saving time and improving the efficiency of protection board installation.

[0003] In the aforementioned patent, the wiring pins of the protection board do not have corresponding positioning components. The battery tabs and external wires need to be fixed separately by welding, wrapping, or additional terminals. The wiring operation relies entirely on manual alignment, resulting in slow wiring speed. At the same time, the welding points are prone to detachment or poor welding due to vibration, and the wires are easily pulled, leading to poor contact and even short circuit or power failure risks. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a lithium battery protection board that facilitates wiring. It solves the technical problem that the wiring pins of the protection board lack corresponding positioning components, and the battery tabs and external wires need to be fixed separately by welding, wrapping, or additional terminals. The wiring operation relies entirely on manual alignment, resulting in slow wiring speed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A lithium battery protection board that is easy to wire includes a lithium battery protection board body, a plurality of first connecting pieces and second connecting pieces, wherein the surface of the lithium battery protection board body is provided with a plurality of through holes; Each of the first connecting pieces has two sets of hollow soft sleeves inside. An elastic washer is fixedly installed on the outer side of each hollow soft sleeve. A support sleeve is slidably installed at the end of each hollow soft sleeve. A conical locking sleeve is fixedly installed inside each hollow soft sleeve. The inner wall of each conical locking sleeve has an arc-shaped structure.

[0006] Preferably, each of the support sleeves has a plug rod fixedly installed inside, and each of the plug rods has an externally protruding collar fixedly installed on its outer side. Each support sleeve is a cup-shaped structure with a closed bottom. Each of the hollow soft sleeves has a positioning clamp ring fixedly installed at its top end, and each positioning clamp ring has a knob rod rotatably installed inside.

[0007] Preferably, each of the plug rods has a threaded opening at its top end that mates with the knob rod, and the thread helix angle between each plug rod and the knob rod is less than the friction angle; Each of the first and second connecting pieces has two contacts at its end; Each of the positioning clamp rings is a cylindrical component with a concave structure at the top, and an annular limiting groove is provided in the upper middle part of the inner wall. The diameter of the upper hole is slightly larger than the head diameter of the knob rod.

[0008] Compared with the prior art, the present invention has the following beneficial effects; In this invention, the first connecting piece corresponds to the end terminal of the battery cell assembly, and the second connecting piece corresponds to the middle series node of the battery cell assembly. By increasing or decreasing the number of these two types of connecting pieces, battery packs with different series and parallel specifications can be quickly adapted. The first and second connecting pieces are made of aluminum-based composite material and mechanical riveting instead of welding. Assembly can be completed using only ordinary crimping tools, simplifying the assembly process, reducing installation difficulty, and increasing the speed of mass production.

[0009] In this invention, the two ends of the elastic washer are aligned with the lithium battery protection board body and the first connecting piece, respectively. On the one hand, the expansion of the hollow soft sleeve and the elastic washer can radially fix the internal structure of the first and second connecting pieces. On the other hand, the elastic deformation of the elastic washer can compensate for the height deviation and position error of the battery cell assembly, ensuring that the connecting piece and the battery cell terminal are always tightly fitted, avoiding poor contact. Attached Figure Description

[0010] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0011] Figure 1 This is a structural diagram of the lithium battery protection board body of this utility model; Figure 2 This is a structural diagram of the connecting piece of this utility model; Figure 3 This is a structural diagram of the conical locking sleeve of this utility model; Figure 4 This is a structural diagram of the externally protruding collar of this utility model.

[0012] In the figure: 11. Lithium battery protection board body; 12. First connecting piece; 13. Second connecting piece; 14. Elastic washer; 15. Hollow soft sleeve; 16. Support sleeve; 17. Knob rod; 18. Conical locking sleeve; 19. Outer convex collar; 21. Insert rod; 22. Positioning clamp ring; 23. Contact. Detailed Implementation

[0013] This application provides a lithium battery protection board that facilitates wiring, effectively solving the problems of slow wiring speed caused by the lack of corresponding positioning components for the wiring pins of the protection board, the need for separate welding, winding, or additional terminals to fix the battery tabs and external wires, and the complete reliance on manual alignment. The first connecting piece corresponds to the end post of the cell group, and the second connecting piece corresponds to the middle series node of the cell group. By increasing or decreasing the number of these two types of connecting pieces, different series and parallel battery packs can be quickly adapted. The first and second connecting pieces are made of aluminum-based composite material and mechanical riveting instead of welding. Assembly can be completed using only ordinary crimping tools, simplifying the assembly process, reducing installation difficulty, and increasing the speed of mass production. Example

[0014] like Figure 1 - Figure 4 As shown, the technical solution in this application embodiment effectively solves the technical problem that the wiring pins of the protection board have no corresponding positioning components, the battery tabs and external wires need to be fixed separately by welding, wrapping or additional terminals, and the wiring operation relies entirely on manual alignment, resulting in slow wiring speed. The overall idea is as follows: To address the problems existing in the prior art, this utility model provides a lithium battery protection board that facilitates wiring, including a lithium battery protection board body 11, a plurality of first connecting pieces 12 and second connecting pieces 13. The surface of the lithium battery protection board body 11 is provided with a plurality of through holes. The first connecting pieces 12 and second connecting pieces 13 are made of aluminum-based composite material. One end of the first connecting pieces 12 and second connecting pieces 13 is a riveting fixing part covering the connection area, and has holes that align with the through holes of the protection board. Mechanical riveting replaces welding, eliminating the need for professional welding equipment and technology. Assembly can be completed with ordinary crimping tools, reducing the difficulty of wiring. Each first connecting piece 12 has two sets of hollow soft sleeves 15 inside. An elastic washer 14 is fixedly installed on the outer side of each hollow soft sleeve 15. A support sleeve 16 is slidably installed at the end of each hollow soft sleeve 15. A conical locking sleeve 18 is fixedly installed inside each hollow soft sleeve 15. The inner wall of each conical locking sleeve 18 has an arc-shaped structure. Due to the arc-shaped protrusion of the outer convex ring 19, the outer convex ring 19 presses against the inner wall of the conical locking sleeve 18. Through the cooperation of the conical locking sleeve 18 and the outer convex ring 19, the conical locking sleeve 18... Under force expansion, the conical locking sleeve 18 simultaneously drives the hollow soft sleeve 15 to expand inside the elastic washer 14. Through the expansion and compression of the hollow soft sleeve 15, the elastic washer 14 is compressed and stretched inside the through hole. Through the expansion of the hollow soft sleeve 15 and the elastic washer 14, the interior of the first connecting piece 12 and the second connecting piece 13 are fixed together. The elastic washer 14 forms an elastic support to compensate for height deviation and position error during the battery cell assembly process, ensuring that the first connecting piece 12 and the second connecting piece 13 are always tightly fitted with the battery cell terminal and avoiding poor contact. Each support sleeve 16 has a plug rod 21 fixedly installed inside, and each plug rod 21 has an externally protruding collar 19 fixedly installed on its outer side. Each support sleeve 16 is a cup-shaped structure with a closed bottom. By moving the support sleeve 16, the hollow soft sleeve 15 and the support sleeve 16 are aligned. By pressing the hollow soft sleeve 15 and the support sleeve 16, the plug rod 21 drives the externally protruding collar 19 to be squeezed into the interior of the hollow soft sleeve 15. At the same time, the externally protruding collar 19 aligns with the inner wall of the conical locking sleeve 18. Each hollow soft sleeve 15 has a positioning clamp ring 22 fixedly installed at its top end. Each positioning clamp ring 22 has a knob rod 17 rotatably installed inside. By rotating the knob rod 17 clockwise, the knob rod 17 moves downward inside the positioning clamp ring 22, and the end of the knob rod 17 rotates into the interior of the plug rod 21. Each plug rod 21 has a threaded opening at its top that fits into the knob rod 17. The thread helix angle between each plug rod 21 and the knob rod 17 is less than the friction angle. The knob rod 17 rotates downward to enter the interior of the plug rod 21. By rotating the knob rod 17, the hollow soft sleeve 15 and the support sleeve 16 are tightened. Each of the first connecting pieces 12 and the second connecting piece 13 has two contacts 23 at its end. By moving the first connecting pieces 12 and the second connecting pieces 13, the first connecting pieces 12 and the second connecting pieces 13 are assembled and installed with the lithium battery protection board body 11. At the same time, the height of the first connecting pieces 12 and the second connecting pieces 13 is adapted to the height of the battery cell terminal. The contacts 23 are connected to the battery cell terminal. The wiring assembly is divided into two specifications: the first connecting piece 12 and the second connecting piece 13, corresponding to the end and middle series nodes of the battery cell group. Through the series and parallel quick adaptation design, different battery packs can be adapted simply by increasing or decreasing the number of the first connecting pieces 12 or the second connecting pieces 13. It can quickly adapt to battery packs with different series and parallel specifications without redesigning the protection board circuit, thus improving the product's versatility. Each positioning clamp ring 22 is a cylindrical component with a concave structure at the top. An annular limiting groove is provided in the upper middle part of the inner wall. The diameter of the upper hole is slightly larger than the head diameter of the knob rod 17, and the diameter of the lower hole is adapted to the diameter of the middle annular protrusion of the knob rod 17. Through the cooperation of the stepped hole and the annular groove, the knob rod 17 is "radially limited and axially prevented from falling off". Example

[0015] This embodiment specifically discloses a lithium battery protection board that facilitates wiring, including the following steps: The first step involves pre-setting multiple through holes on the surface of the lithium battery protection board body 11. The first connecting piece 12 and the second connecting piece 13 are made of aluminum-based composite material (balancing conductivity and structural strength). One end of each piece is a "riveting fixing part" (with holes that align with the through holes of the protection board). During assembly, no professional welding equipment is required. The first connecting piece 12 and the second connecting piece 13 can be mechanically riveted to the lithium battery protection board body 11 using only ordinary crimping tools, which greatly reduces the difficulty of wiring operations. The first connecting piece 12 corresponds to the end terminal of the cell group, and the second connecting piece 13 corresponds to the middle series node of the cell group. By increasing or decreasing the number of these two types of connecting pieces, battery packs with different series and parallel specifications can be quickly adapted without redesigning the protection board circuit, thus improving the product's versatility. The support sleeve 16 and the hollow soft sleeve 15 are sliding fit structures. First, move the support sleeve 16 to align the axis of the hollow soft sleeve 15 with that of the support sleeve 16. Then, press the hollow soft sleeve 15 and the support sleeve 16 so that the plug rod 21 inside the support sleeve 16 drives the outer convex ring 19 (with an arc-shaped protrusion structure on the surface) to gradually squeeze into the internal cavity of the hollow soft sleeve 15. At the same time, make the outer convex ring 19 and the conical locking sleeve 18 (with an arc-shaped inner wall) inside the hollow soft sleeve 15 precisely aligned. The hollow soft sleeve 15 is made of high-temperature vulcanized silicone rubber. The hollow soft sleeve 15 can expand radially under the compression of the outer convex ring 19 and can return to its initial shape after expansion.

[0016] In the second step, when the arc-shaped protrusion of the outer convex collar 19 presses against the inner wall of the arc surface of the conical locking sleeve 18, the conical locking sleeve 18 expands radially under the force of the "inclined surface expansion principle". The conical locking sleeve 18 simultaneously drives the hollow soft sleeve 15 to expand inside the elastic washer 14. The expansion of the hollow soft sleeve 15 will press against the outer elastic washer 14, causing the elastic washer 14 to be compressed and stretched in the through hole of the protection plate body 11. The elastic washer 14 has a corrugated ring structure. The two ends of the elastic washer 14 are aligned with the lithium battery protection plate body and the first connecting piece 12, respectively. On the one hand, the expansion of the hollow soft sleeve 15 and the elastic washer 14 can fix the internal structure of the first connecting piece 12 and the second connecting piece 13 radially. On the other hand, the elastic deformation of the elastic washer 14 can compensate for the height deviation and position error of the battery cell assembly, ensuring that the connecting piece and the battery cell terminal are always tightly attached and avoiding poor contact. Inside the positioning clamp ring 22 at the top of the hollow soft sleeve 15 (used to constrain the movement path of the knob rod 17), the knob rod 17 is rotatably installed. The top of the plug rod 21 has a pre-set threaded opening that matches the knob rod 17, and the thread helix angle of the two is less than the friction angle (belonging to the self-locking thread design). When the knob rod 17 is rotated clockwise, the knob rod 17 moves downward along the axial direction of the positioning clamp ring 22, and its end is screwed into the threaded opening of the plug rod 21. By rotating the knob rod 17, the hollow soft sleeve 15 and the support sleeve 16 can be further tightened. At the same time, the self-locking characteristic of the thread is used to prevent the connection from loosening and ensure a long-term stable electrical connection.

[0017] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A lithium battery protection board for easy wiring, comprising a lithium battery protection board body (11), a plurality of first connecting pieces (12) and second connecting pieces (13), characterized in that, The surface of the lithium battery protection board body (11) is provided with multiple through holes; Each of the first connecting pieces (12) has two sets of hollow soft sleeves (15) inside, and each hollow soft sleeve (15) has an elastic washer (14) fixedly installed on the outside of it, and a support sleeve (16) is slidably installed at the end of each hollow soft sleeve (15). Each hollow soft sleeve (15) has a conical locking sleeve (18) fixedly installed inside, and the inner wall of each conical locking sleeve (18) has an arc-shaped structure.

2. The lithium battery protection board of easy wiring according to claim 1, characterized in that, Each of the support sleeves (16) has a plug rod (21) fixedly installed inside, and each of the plug rods (21) has an externally protruding collar (19) fixedly installed on its outer side. Each support sleeve (16) is a cup-shaped structure with a closed bottom.

3. The lithium battery protection board of claim 1, wherein, Each of the hollow soft sleeves (15) is fixedly installed with a positioning clamp ring (22) at its top end, and a knob rod (17) is rotatably installed inside each of the positioning clamp rings (22).

4. The lithium battery protection board of claim 2, wherein, Each of the plug rods (21) has a threaded opening at its top end that fits into the knob rod (17), and the thread helix angle between each plug rod (21) and the knob rod (17) is less than the friction angle.

5. A lithium battery protection board for easy wiring as described in any one of claims 1-4, characterized in that, Each of the first connecting piece (12) and the second connecting piece (13) has two contacts (23) at its end.

6. A lithium battery protection board for easy wiring as described in claim 3, characterized in that, Each of the positioning clamp rings (22) is a cylindrical component with a concave structure at the top, and an annular limiting groove is provided in the upper part of the inner wall. The diameter of the upper hole is slightly larger than the head diameter of the knob rod (17).

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