Sampling branch structure with fuse function

Abstract

The invention discloses a sampling branch structure with a fuse function, and the structure comprises a welding region, and the edge of the welding region is covered with a film structure. The expansion and shrinkage area is of a concentric-square-shaped expansion and shrinkage structure, and a safety structure is arranged in the expansion and shrinkage area; the tin penetrating hole is of a curve type structure; the tin penetrating holes connected and welded with the copper wire are designed to be of a curve structure, the tin climbing amount after welding is increased, the tin penetrating holes are connected through the notches, the tin climbing amount is increased, and meanwhile tin explosion can be prevented; film structures are designed on four sides of the copper foil in a contact area with the aluminum bar, so that the strength of the area is effectively improved; the fuse structure is designed in a curve mode and is provided with a plurality of bent structures, impact on the fuse part can be effectively relieved when the fuse is pulled, and breakage is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of CCS manufacturing for energy storage battery packs, and specifically to a sampling branch structure with a fuse function. Background Art

[0002] In the existing sampling structure, the via hole is a key channel for connecting electrical signals or power supplies between different circuit layers, and its performance and reliability are crucial. However, there are some deficiencies in the design and use of the via hole in the traditional sampling structure, which affect the overall performance and connection strength.

[0003] The current battery sampling branch structure consists of 3 via holes, a serpentine expansion and contraction area, and an ultrasonic soldering pad; After soldering the 3 small holes connected to the copper wire by tin soldering, the tin climbing is less, and the connection strength will be relatively small; The area overlapping with the aluminum bar only has copper foil, and the strength is relatively small after ultrasonic welding, and there are potential safety hazards in the product; In summary, the existing sampling structure has deficiencies in terms of via hole tin climbing, connection strength, and fuse protection. To solve these problems, a sampling structure with high via hole tin climbing, high connection strength, and a fuse has emerged. This structure effectively improves the performance and reliability of the sampling structure by optimizing the design of the via hole, increasing the connection strength, and adding fuse protection. Summary of the Invention

[0004] In order to overcome the deficiencies of the existing technical solutions, the present invention provides a sampling branch structure with a fuse function, which can effectively solve the problem that the tin climbing of the 3 small holes connected to the copper wire by tin soldering is less and the connection strength is relatively small proposed in the background art.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a sampling branch structure with a fuse function, including a welding area, and a film structure covers the edge of the welding area; an expansion and contraction area, which is a loop expansion and contraction structure, and an insurance structure is arranged inside it; a via hole, which is a curved structure.

[0006] Further, the insurance structure is a fuse, and part or all of the fuse is designed as a serpentine curve.

[0007] Further, the via hole is provided with a cut, and the cut is one or more of a straight cut, a triangular cut, and a diamond cut.

[0008] Further, at least two of the via holes are arranged horizontally in a group and are connected by a cut to form a row of holes.

[0009] Further, the rows of holes are vertically arranged from top to bottom.

[0010] Further, the membrane structure includes at least one of a PC membrane, a PET membrane, a PMMA membrane, and a PI membrane.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the solder climbing amount after welding is increased, and at the same time, the width dimension of the cut is a thin slit, which can increase the solder climbing amount and prevent solder explosion.

[0012] The four sides of the copper foil in the area in contact with the aluminum bar are designed with a membrane structure, which effectively increases the strength of this area.

[0013] The unique structural design of the loop expansion and contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic diagram of the cut in the second embodiment of the present invention; Figure 3 is a schematic diagram of the cut in the third embodiment of the present invention; Figure 4 is a schematic diagram of the cut in the fourth embodiment of the present invention.

[0015] Reference numerals in the figures: 1 - welding area, 2 - expansion and contraction area, 3 - insurance structure, 4 - tin - through hole, 5 - cut, 6 - membrane structure, 7 - row of holes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following describes the embodiments of the present disclosure in detail with reference to the drawings.

[0017] The following uses specific examples to illustrate the implementation manners of the present disclosure. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0018] As Figures 1-4 shown, the present invention provides a sampling branch structure with a fuse function, and its detailed structure is as follows: Welding area 1: This area is welded to the aluminum bar to ensure the electrical connection between the sampling branch structure and the battery module. At the edge of the welding area 1, a film structure 6 is designed, which covers the four sides of the copper foil, effectively enhancing the strength of this area and preventing breakage or fracture during welding and use.

[0019] Expansion and contraction area 2: The expansion and contraction area 2 is designed as a loop expansion and contraction structure, which can well absorb the expansion and contraction generated by the battery cell during charge and discharge. An insurance structure 3 is arranged inside the expansion and contraction area 2, and the insurance structure 3 is a fuse to ensure that it can be melted in time when overcurrent or short circuit occurs in the circuit, protecting the safety of the battery module and the sampling branch structure.

[0020] Tin-penetrating hole 4: The tin-penetrating hole 4 is used to connect with the conductor to achieve the electrical connection between the sampling branch structure and the external circuit; the tin-penetrating hole 4 is designed as a curved structure, so that the solder can flow along the curve during welding, increasing the contact area between the solder and the copper wire and the circuit board, thereby improving the welding strength; at the same time, the tin-penetrating hole 4 is also provided with a notch 5, which can not only increase the tin climbing amount but also effectively prevent the phenomenon of tin explosion.

[0021] See Figure 1 , the insurance structure 3 is a fuse, and part or all of the fuse is designed as a snake-shaped curve to relieve the impact of pulling on the weak part of the fuse. It can effectively relieve the impact on the fuse part during pulling and avoid breakage. The material of the fuse is selected as a metal or alloy with a high melting point and high conductivity, such as copper alloy, nickel-chromium alloy or silver alloy, to ensure that the fuse has good conductivity under normal working conditions and can be quickly melted under overcurrent conditions.

[0022] See Figures 1 to 4 , the tin-penetrating hole 4 is provided with a notch 5, and the notch 5 is one or more of a straight notch 5, a triangular notch 5 and a diamond-shaped notch 5, which can increase the tin climbing amount and prevent tin explosion at the same time.

[0023] The design of the straight notch 5 enables the solder to penetrate more fully into the tin-penetrating hole 4, increasing the welding area and thus improving the welding firmness. The straight notch 5 is relatively simple and easy to process and manufacture on the sampling branch structure, which helps to reduce production costs and improve production efficiency. The straight notch 5 enables the tin liquid to penetrate more easily along the direction of the notch 5, thereby increasing the contact area with the solder pad and improving the welding strength. Since the tin liquid flows more smoothly, the pressure generated by the accumulation of the tin liquid is reduced, thus reducing the risk of tin explosion.

[0024] The design of the triangular notch 5 can form more heat dissipation channels in the welding area 1, which helps to reduce the heat generated during welding, protect the safe operation of the circuit. The three sides of the triangle can serve as the guide for the flow of the tin liquid, enabling the tin liquid to be more evenly distributed on the pad, increasing the amount of tin climbing. The triangular notch 5 can disperse the pressure during the flow of the tin liquid, reducing the phenomenon of tin explosion caused by excessive local tin liquid. The triangular notch 5 enables the through-tin hole 4 to have higher flexibility when connecting conductors, and can adapt to more complex spatial layouts and bending requirements.

[0025] The design of the diamond-shaped notch 5 can increase the contact area between the soldering tin and the inner wall of the through-tin hole 4, thereby improving the reliability and stability of welding. The four corners of the diamond can serve as the "anchor points" for the flow of the tin liquid, enabling the tin liquid to adhere more firmly to the pad. At the same time, the diamond shape also helps the tin liquid to be more evenly distributed. The diamond-shaped notch 5 can effectively disperse the impact force during the flow of the tin liquid, avoiding the phenomenon of tin explosion caused by the impact of the tin liquid. The diamond-shaped notch 5 has a unique shape and appearance, which can increase the overall aesthetics of the sampling branch structure and enhance the visual effect of the product. The design of the diamond-shaped notch 5 helps to reduce defects during welding, such as bubbles, cracks, etc., thereby improving the welding quality.

[0026] See Figure 1 , at least two through-tin holes 4 are arranged horizontally in groups and are connected by the notch 5 to form a hole row 7.

[0027] The design of the hole row 7 enables multiple through-tin holes 4 to be welded simultaneously, thereby improving the welding efficiency, being applicable to large-scale production environments, and helping to shorten the production cycle and reduce costs; since the through-tin holes 4 in the hole row 7 have the same size and shape, the consistency during the welding process can be ensured, which helps to reduce welding defects and improve the welding quality and reliability.

[0028] The design of the hole row 7 increases the heat dissipation area in the welding area 1, helps to reduce the heat generated during welding, helps to protect the safe operation of the circuit, and prevents circuit damage caused by overheating.

[0029] The hole row 7 formed by connecting the notches 5 can form a more effective heat dissipation channel, accelerate the transfer and dissipation of heat, help to improve the heat dissipation efficiency, and ensure the stable operation of the electronic device in a high-temperature environment.

[0030] The design of the hole row 7 enables the sampling branch structure to have higher flexibility when connecting conductors, helps to adapt to complex spatial layouts and bending requirements, and ensures the stability and reliability of the connection.

[0031] When subjected to external forces, the through-tin holes 4 in the hole row 7 can disperse the stress, reduce the risk of connection failure, and help to improve the overall reliability and stability of the electronic device.

[0032] See Figure 1 , the hole rows 7 are vertically arranged from top to bottom.

[0033] The vertically arranged hole rows 7 can make more effective use of the space on the sampling branch structure, especially in electronic devices with limited space. This design helps to reduce the volume and weight of electronic products, meeting the trend of modern electronic devices towards high density and miniaturization. The vertically arranged hole rows 7 make the layout of the sampling branch structure more flexible.

[0034] The vertically arranged hole rows 7 facilitate batch soldering operations. Through automated soldering equipment, multiple hole rows 7 can be soldered simultaneously, thus improving the soldering efficiency. Since the through-tin holes 4 in the hole rows 7 have the same size and shape, and the vertical arrangement helps to maintain consistency during the soldering process, it helps to reduce soldering defects and improve the soldering quality and reliability.

[0035] Among them, the film structure 6 includes at least one of PC film, PET film, PMMA film and PI film.

[0036] PC film: The PC film has excellent physical and mechanical properties, such as high impact resistance, tensile strength, flexural strength and compressive strength, which makes it perform well in protecting circuits and components.

[0037] Heat resistance and low temperature resistance: The PC film has stable mechanical properties, dimensional stability and electrical properties within a wide temperature range, so it is suitable for electronic devices in various extreme environments.

[0038] Flame retardancy: Flame retardant PC films are also widely used in application scenarios such as electronic components and electrical enclosures that require flame retardant properties.

[0039] PET film: The PET film has excellent physical properties, such as good toughness, high tensile strength and impact strength, and stable dimensions.

[0040] Chemical properties: The PET film also has good chemical properties, such as chemical resistance and oil resistance, and is suitable for various chemical environments.

[0041] PMMA film: Chemical stability: The PMMA film has good chemical stability and weather resistance, and is suitable for various harsh environments.

[0042] Optical properties: The PMMA film has excellent optical properties, such as high light transmittance and low birefringence.

[0043] PI film: The PI film has extremely high heat resistance and can be used in high temperature environments for a long time.

[0044] PI film has excellent insulation performance and is suitable for the field of electrical insulation, such as high-grade insulation systems for motors, transformers, etc.

[0045] PI film also has excellent characteristics such as high and low temperature resistance, radiation resistance, low vacuum mass loss, and low condensable volatile substances.

[0046] During use: 1. The solder penetration hole 4 connected and welded to the copper wire is designed as a curved structure to increase the solder climbing amount after welding. At the same time, the width dimension of the notch 5 is a narrow slit, which can increase the solder climbing amount and prevent solder explosion.

[0047] 2. There is a film structure 6 designed on the four sides of the copper foil in the contact area with the aluminum bar, which effectively increases the strength of this area.

[0048] 3. The structure of the fuse is designed as a serpentine curve design, not a straight-line design, with multiple bending structures, which can effectively relieve the impact on the fuse part during pulling and avoid breakage.

[0049] Example 1: Sampling branch structure covered with PI film and designed with a straight notch 5 The sampling branch structure of this example is particularly suitable for application scenarios that require high insulation performance and mechanical strength. The specific design is as follows: Welding area 1: Copper foil is used to weld with the aluminum bar. The edges of the welding area 1 and the four sides where the copper foil contacts the aluminum bar are carefully covered with PI film. With its excellent insulation performance and heat resistance, the PI film provides additional protection for the welding area 1 and effectively enhances the strength of this area.

[0050] Expansion and contraction area 2: It is designed as a loop expansion and contraction structure, with a fuse embedded inside. The fuse part is designed with a serpentine curve to enhance its tensile strength.

[0051] Solder penetration hole 4: It is designed as a curved structure to increase the solder climbing amount and improve the welding quality. The solder penetration hole 4 is provided with a straight notch 5, and the width of the notch 5 is 1 mm. This design not only increases the solder climbing amount but also effectively prevents the occurrence of solder explosion. At least two solder penetration holes 4 are arranged horizontally in groups and are connected by a straight notch 5 to form a hole row 7, and the hole row 7 is arranged vertically from top to bottom, facilitating the insertion and welding of conductors.

[0052] Example 2: Sampling branch structure covered with PET film and designed with a triangular notch 5 See Figure 2 , the sampling branch structure of this example focuses more on cost control and certain insulation performance. The specific design is as follows: Welding area 1: Copper foil and aluminum bar are also used for welding, but the film structure 6 in welding area 1 is selected as PET film. The PET film provides effective protection for welding area 1 with its good insulation performance and relatively low cost.

[0053] Expansion and contraction area 2: The design is the same as that of the first embodiment, adopting a circular expansion and contraction structure design, with a fuse embedded with serpentine curves inside, which can well absorb the expansion and contraction of the battery cell.

[0054] Tin-penetrating hole 4: It is designed as a curved structure. The tin-penetrating hole 4 is provided with a triangular notch 5, and the width of the notch 5 is 1.5 mm. This design not only increases the tin climbing amount but also effectively prevents the occurrence of tin explosion. The tin-penetrating hole 4 is also arranged at least in groups of two horizontally and connected by the triangular notch 5 to form a hole row 7, and the hole row 7 is arranged vertically from top to bottom.

[0055] Embodiment 3: PMMA film covering and sampling branch structure with diamond-shaped notch 5 design See Figure 3 , the sampling branch structure of this embodiment is applicable to application scenarios that require relatively high transparency and certain insulation performance. The specific design is as follows: Welding area 1: Copper foil and aluminum bar are used for welding, and the film structure 6 in welding area 1 is selected as PMMA film. The PMMA film provides protection for welding area 1 with its high transparency and good insulation performance.

[0056] Expansion and contraction area 2: The design is the same as that of the first embodiment and the second embodiment, adopting a circular expansion and contraction structure design, with a fuse embedded with serpentine curves inside.

[0057] Tin-penetrating hole 4: It is designed as a curved structure. The tin-penetrating hole 4 is provided with a diamond-shaped notch 5, and the width of the notch 5 is 2 mm. This design not only increases the tin climbing amount but also effectively prevents the occurrence of tin explosion. The tin-penetrating hole 4 is arranged at least in groups of two horizontally and connected by the diamond-shaped notch 5 to form a hole row 7, and the hole row 7 is arranged vertically from top to bottom.

[0058] Embodiment 4: PC film covering and sampling branch structure with mixed notch 5 design See Figure 4 , the sampling branch structure of this embodiment aims to provide a sampling branch structure with better comprehensive performance. The specific design is as follows: Welding area 1: Copper foil and aluminum bar are used for welding, and the film structure 6 in welding area 1 is selected as PC film. The PC film provides protection for welding area 1 with its good insulation performance and mechanical strength.

[0059] Expansion and contraction area 2: The design is the same as that of the first embodiment, the second embodiment and the third embodiment, adopting a circular expansion and contraction structure design, with a fuse embedded with serpentine curves inside.

[0060] Tin-penetrating hole 4: Designed as a curved structure, the tin-penetrating hole 4 is provided with a mixed notch 5, that is, a combination of a straight notch 5 and a triangular notch 5. This not only increases the amount of tin climbing but also effectively prevents the occurrence of tin explosion. At least two tin-penetrating holes 4 are arranged horizontally in groups and are connected by the mixed notch 5 to form a hole row 7, and the hole rows 7 are arranged vertically from top to bottom, providing more flexibility and adaptability.

[0061] Through four different embodiments, the design changes of the sampling branch structure in different application scenarios are demonstrated. Each embodiment is optimized for specific requirements (such as high insulation performance, mechanical strength, cost control, transparency, etc.), thus reflecting the diversity and flexibility of the design.

[0062] These four embodiments respectively use PI film, PET film, PMMA film and PC film as the covering materials of the welding area 1. By comparing the performance of these materials under the same design, the influence of their protection effects on the welding area 1 and their advantages and disadvantages in terms of cost, insulation performance, transparency, etc. can be evaluated.

[0063] Each embodiment adopts a different design of the notch 5 of the tin-penetrating hole 4, and details how these designs increase the amount of tin climbing and prevent the occurrence of tin explosion.

[0064] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "middle", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0065] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. The meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise clearly specifically limited.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The above are only illustrative of the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made without creative efforts within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sampling branch structure with a fuse function, characterized in that: include a welding area, the edge of which is covered with a membrane structure; The expansion and contraction area is a return-type expansion and contraction structure, and a safety structure is arranged inside the expansion and contraction area; The tin-penetrating hole is a curved structure.

2. The sampling branch structure with fuse function according to claim 1, characterized in that: The safety structure is a fuse, and part or all of the fuse is designed as a serpentine curve.

3. The sampling branch structure with fuse function according to claim 1, characterized in that: The tin-through hole is provided with a cutout, and the cutout is one or more of a straight cutout, a triangular cutout and a diamond cutout.

4. The sampling branch structure with fuse function according to claim 1, characterized in that: At least two of the tin-through holes are arranged in groups transversely and connected by cutouts to form a hole row.

5. The sampling branch structure with fuse function according to claim 1, characterized in that: The hole rows are arranged vertically from top to bottom.

6. The sampling branch structure with fuse function according to claim 1, characterized in that: The film structure includes at least one of a PC film, a PET film, a PMMA film and a PI film.

Images