Sampling branch structure with fuse function

Abstract

The utility model discloses a sampling branch structure with a fuse function, which comprises a welding area, and the edge of the welding area 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 wires are designed into curve structures, 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 utility model relates to the energy storage battery pack CCS manufacturing field technical field, concretely is a kind of sampling branch structure with fuse function. BACKGROUND

[0002] In the existing sampling structure, tin hole is as the key passage connecting electrical signal or power supply between different circuit layers, and its performance and reliability are crucial. However, the traditional sampling structure has some deficiencies in the design and use of tin hole, which affects the overall performance and connection strength.

[0003] The current battery sampling branch structure is composed of three tin holes, a serpentine expansion and contraction area, and an ultrasonic welding pad.

[0004] The three small hole tin soldering connections with copper wire tin soldering have less tin creep, and the connection strength is small.

[0005] The copper foil in the aluminum bar lapping area is small in strength after ultrasonic welding, and the product has safety hazards.

[0006] In summary, the existing sampling structure has deficiencies in tin hole tin creep, connection strength and fuse protection. To solve these problems, a sampling structure with high tin hole tin creep, high connection strength and fuse protection has emerged. This structure optimizes the design of the tin hole, improves the connection strength and adds fuse protection, effectively improving the performance and reliability of the sampling structure. SUMMARY

[0007] To overcome the deficiencies of the prior art, the utility model provides a sampling branch structure with fuse function, which can effectively solve the problem of the three small hole tin soldering connections with copper wire tin soldering having less tin creep and small connection strength.

[0008] The utility model solves the technical problems by adopting the following technical scheme: a sampling branch structure with fuse function, comprising

[0009] A welding area, the edge of the welding area is covered with a film structure.

[0010] An expansion and contraction area, which is a back-shaped expansion and contraction structure, has an insurance structure inside.

[0011] A tin hole, which is a curved structure.

[0012] Further, the insurance structure is a fuse, and the fuse is partially or entirely designed as a serpentine curve.

[0013] Further, the tin hole is provided with a cutout, which is one or more of a straight cutout, a triangular cutout and a rhombic cutout.

[0014] Further, the tin penetrating holes are arranged in groups of at least two in a transverse direction and connected by the cutouts to form a hole row.

[0015] Further, the hole row is arranged vertically from top to bottom.

[0016] Further, the film structure comprises at least one of PC film, PET film, PMMA film and PI film.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows: the tin penetration amount after welding is increased, the cutout width size is a small gap, the tin penetration amount is increased while preventing tin explosion.

[0018] The four edges of the copper foil in contact with the aluminum bar are designed with a film structure, effectively increasing the strength of the area.

[0019] The unique structure design of the back type expansion and contraction. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure of the present application is shown in the figure;

[0021] Figure 2 The cutout of the second embodiment of the present application is shown in the figure;

[0022] Figure 3 The cutout of the third embodiment of the present application is shown in the figure;

[0023] Figure 4 The cutout of the fourth embodiment of the present application is shown in the figure.

[0024] Reference numerals in the figure:

[0025] 1-welding area, 2-expansion and contraction area, 3-safety structure, 4-tin penetrating hole, 5-cutout, 6-film structure, 7-hole row. DETAILED DESCRIPTION

[0026] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0027] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0028] like Figures 1-4 As shown, this utility model provides a sampling branch structure with a fuse function, the detailed structure of which is as follows:

[0029] Welding Zone 1: This area is welded to the aluminum foil to ensure electrical connection between the sampling branch structure and the battery module. A membrane structure 6 is designed at the edge of Welding Zone 1, covering the four edges of the copper foil, effectively enhancing the strength of this area and preventing damage or breakage during welding and use.

[0030] Expansion / Contraction Zone 2: Expansion / Contraction Zone 2 is designed with a U-shaped expansion / contraction structure, which can effectively absorb the expansion and contraction of the battery cell during charging and discharging. An internal safety structure 3, which is a fuse, is installed in Expansion / Contraction Zone 2 to ensure timely melting and protection of the battery module and sampling branch structure in the event of overcurrent or short circuit.

[0031] Through-hole 4: Through-hole 4 is used to connect with the conductor to realize the electrical connection between the sampling branch structure and the external circuit. Through-hole 4 is designed with a curved structure, which allows the solder to flow along the curve during the soldering process, increasing the contact area between the solder and the copper wire and the circuit board, thereby improving the soldering strength. At the same time, through-hole 4 is also provided with a notch 5, which can increase the amount of solder climbing and effectively prevent the occurrence of solder splatter.

[0032] See Figure 1 The third safety structure is the fuse. The fuse is partially or entirely designed with a serpentine curve to mitigate the impact of pulling on the weak parts of the fuse. When pulled, it can effectively reduce the impact on the fuse and prevent breakage. The fuse is made of high-melting-point, high-conductivity metals or alloys, such as copper alloys, nickel-chromium alloys, or silver alloys, to ensure that the fuse has good conductivity under normal operating conditions and can melt quickly under overcurrent conditions.

[0033] See Figures 1 to 4The through-hole 4 is provided with a cutout 5, which is one or more of a straight cutout 5, a triangular cutout 5, and a rhombic cutout 5, to increase the amount of tin climbing while preventing tin explosion.

[0034] The design of the straight cutout 5 allows the soldering tin to penetrate more fully into the through-hole 4, increasing the soldering area and thus improving the strength of the soldering. The straight cutout 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 cutout 5 allows the tin liquid to penetrate more easily in the direction of the cutout 5, thereby increasing the contact area with the solder pad and improving the soldering strength. Since the tin liquid flows more smoothly, the pressure caused by the accumulation of tin liquid is reduced, thereby reducing the risk of tin explosion.

[0035] The design of the triangular cutout 5 can form more heat dissipation channels in the soldering area 1, which helps to reduce the heat generated during soldering and protect the safe operation of the circuit. The three sides of the triangle can serve as guides for the flow of tin liquid, allowing the tin liquid to be more evenly distributed on the solder pad, increasing the amount of tin climbing. The triangular cutout 5 can disperse the pressure of the tin liquid flow, reducing the phenomenon of tin explosion caused by excessive local tin liquid. The triangular cutout 5 allows the through-hole 4 to have higher flexibility when connecting conductors, which can adapt to more complex spatial layouts and bending requirements.

[0036] The design of the rhombic cutout 5 can increase the contact area between the soldering tin and the inner wall of the through-hole 4, thereby improving the reliability and stability of the soldering. The four corners of the rhombus can serve as "anchor points" for the flow of tin liquid, allowing the tin liquid to adhere more firmly to the solder pad. At the same time, the shape of the rhombus also helps to distribute the tin liquid more evenly. The rhombic cutout 5 can effectively disperse the impact force of the tin liquid flow, avoiding the phenomenon of tin explosion caused by the impact of the tin liquid. The rhombic cutout 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 rhombic cutout 5 helps to reduce defects such as bubbles and cracks during soldering, thereby improving the quality of soldering.

[0037] Referring to Figure 1 The through-hole 4 is provided with a cutout 5, which is one or more of a straight cutout 5, a triangular cutout 5, and a rhombic cutout 5, to increase the amount of tin climbing while preventing tin explosion.

[0038] The design of the hole row 7 allows multiple through-holes 4 to be soldered simultaneously, thereby improving the efficiency of soldering and being suitable for large-scale production environments, which helps to shorten the production cycle and reduce costs. Since the through-holes 4 in the hole row 7 have the same size and shape, consistency during soldering can be ensured, which helps to reduce soldering defects and improve the quality and reliability of soldering.

[0039] The design of the hole row 7 increases the heat dissipation area of the welding area 1 domain, which helps to reduce the heat generated during the welding process, and helps to protect the safe operation of the circuit and prevent damage to the circuit due to overheating.

[0040] The hole row 7 formed by the connection of the cutouts 5 can form more effective heat dissipation channels, accelerate the transfer and dissipation of heat, and help to improve the heat dissipation efficiency and ensure the stable operation of electronic equipment in high temperature environment.

[0041] The design of the hole row 7 makes the sampling branch structure have higher flexibility when connecting conductors, which helps to adapt to complex spatial layout and bending requirements, and ensures the stability and reliability of the connection.

[0042] When subjected to external forces, the tin holes 4 in the hole row 7 can disperse stress and reduce the risk of connection failure, which helps to improve the overall reliability and stability of electronic equipment.

[0043] Referring to Figure 1 , the hole row 7 is vertically arranged from top to bottom.

[0044] The vertically arranged hole row 7 can make more effective use of the space on the sampling branch structure, especially in electronic equipment with limited space. This design helps to reduce the volume and weight of electronic products, meeting the trend of modern electronic equipment towards high density and miniaturization. The vertically arranged hole row 7 makes the sampling branch structure more flexible in layout.

[0045] The vertically arranged hole row 7 facilitates batch soldering operations. Through automated soldering equipment, multiple hole rows 7 can be soldered simultaneously, thereby improving soldering efficiency. Since the tin holes 4 in the hole row 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 soldering quality and reliability.

[0046] Among them, the film structure 6 at least includes one of PC film, PET film, PMMA film and PI film.

[0047] PC film:

[0048] PC film has excellent physical and mechanical properties, such as impact resistance, tensile strength, bending strength and compression strength, etc., which makes it excellent in protecting circuits and components.

[0049] Heat resistance and low temperature resistance: PC film has stable mechanical properties, dimensional stability and electrical properties in a wide temperature range, so it is suitable for electronic equipment in various extreme environments.

[0050] Flame retardancy: Flame-retardant PC film is also widely used in electronic components, electrical enclosures and other applications that require flame retardant properties.

[0051] PET film:

[0052] PET film has excellent physical properties, such as good toughness, high tensile strength and impact strength, and dimensional stability.

[0053] Chemical properties: PET film also has good chemical properties, such as chemical resistance and oil resistance, suitable for various chemical environments.

[0054] PMMA film:

[0055] Chemical stability: PMMA film has good chemical stability and weather resistance, suitable for various harsh environments.

[0056] Optical properties: PMMA film has excellent optical properties, such as high transmittance and low birefringence.

[0057] PI film:

[0058] PI film has extremely high heat resistance and can be used in high temperature environments for a long time.

[0059] PI film has excellent insulation performance, suitable for high-grade insulation systems in electrical insulation fields such as motors, transformers, etc.

[0060] PI film also has excellent high and low temperature resistance, radiation resistance, low vacuum mass loss, and low condensable volatile matter, etc.

[0061] In use:

[0062] 1. The tin hole 4 connected and welded with copper wire is designed as a curved structure, which increases the amount of tin after welding, and at the same time the width size of the cutout 5 is a small gap, which increases the amount of tin while preventing tin explosion.

[0063] 2. The four edges of the copper foil in the contact area with the aluminum bar are designed with film structure 6, which effectively increases the strength of the area.

[0064] 3. The structure of the fuse is designed as a serpentine curve, which is not a straight line design, with multiple bending structures, which can effectively relieve the impact on the fuse part when pulled, avoiding breakage.

[0065] Example one: PI film covers the sampling branch structure designed with a one-cut 5

[0066] The sampling branch structure of this embodiment is particularly suitable for application scenarios that require high insulation performance and mechanical strength. The specific design is as follows:

[0067] Welding area 1: copper foil is welded with aluminum bar, and the edges of welding area 1 and the four edges of the contact between copper foil and aluminum bar are carefully covered with PI film. PI film provides additional protection for welding area 1 with its excellent insulation performance and heat resistance, effectively enhancing the strength of the area.

[0068] Expansion zone 2: designed as a back-shaped expansion structure, with a fuse embedded inside. The fuse part adopts a serpentine curve design to enhance its resistance to pulling.

[0069] Tin hole 4: designed as a curved structure to increase the amount of tin climbing and improve the quality of welding. The tin hole 4 is provided with a slit 5, and the width of the slit 5 is 1 mm. This design not only increases the amount of tin climbing, but also effectively prevents the occurrence of tin explosion phenomenon. The tin hole 4 is arranged in at least two groups in the transverse direction and connected by a slit 5 to form a hole row 7, which is arranged vertically from top to bottom.

[0070] Example two: PET film covering and sampling branch structure with triangular cutout 5 design

[0071] Referring to Figure 2 , the sampling branch structure of the present embodiment focuses more on cost control and certain insulation performance. The specific design is as follows:

[0072] Welding area 1: also uses copper foil and aluminum bar for welding, but the film structure 6 of the welding area 1 is selected as PET film. The PET film provides effective protection for the welding area 1 with its good insulation performance and relatively low cost.

[0073] Expansion zone 2: the same design as example one, using a back-shaped expansion structure design, with a serpentine curve fuse embedded inside, which can well absorb the expansion and contraction of the battery cell.

[0074] Tin hole 4: designed as a curved structure, and the tin hole 4 is provided with a triangular cutout 5, and the width of the cutout 5 is 1.5 mm. This design not only increases the amount of tin climbing, but also effectively prevents the occurrence of tin explosion phenomenon. The tin hole 4 is arranged in at least two groups in the transverse direction and connected by a triangular cutout 5 to form a hole row 7, which is arranged vertically from top to bottom.

[0075] Example three: PMMA film covering and sampling branch structure with diamond cutout 5 design

[0076] Referring to Figure 3 , the sampling branch structure of the present embodiment is suitable for application scenarios that require high transparency and certain insulation performance. The specific design is as follows:

[0077] Welding area 1: uses copper foil and aluminum bar for welding, and the film structure 6 of the welding area 1 is selected as PMMA film. The PMMA film provides protection for the welding area 1 with its high transparency and good insulation performance.

[0078] Expansion zone 2: the same design as example one and example two, using a back-shaped expansion structure design, with a serpentine curve fuse embedded inside.

[0079] Tin hole 4: Designed as a curved structure, tin hole 4 is provided with mixed cut 5, that is, a combination of a straight cut 5 and a triangular cut 5. This not only increases the amount of tin climbing, but also effectively prevents the occurrence of tin explosion phenomenon. Tin hole 4 is arranged in at least two groups in the horizontal direction and connected by mixed cut 5 to form hole row 7, which is vertically arranged from top to bottom.

[0080] Example Four: PC film covering and mixed cut 5 design of sampling branch structure

[0081] Referring to Figure 4 The sampling branch structure of the present embodiment aims to provide a sampling branch structure with better overall performance. The specific design is as follows:

[0082] Welding area 1: Copper foil and aluminum bar are used for welding, and the film structure 6 of the welding area 1 is selected as PC film. PC film provides protection for the welding area 1 with its good insulation performance and mechanical strength.

[0083] Expansion area 2: The design is the same as that of example one, example two and example three, using a back-shaped expansion structure design, with a snakelike curved fuse embedded inside.

[0084] Tin hole 4: Designed as a curved structure, tin hole 4 is provided with mixed cut 5, that is, a combination of a straight cut 5 and a triangular cut 5. This not only increases the amount of tin climbing, but also effectively prevents the occurrence of tin explosion phenomenon. Tin hole 4 is arranged in at least two groups in the horizontal direction and connected by mixed cut 5 to form hole row 7, which is vertically arranged from top to bottom.

[0085] Through the four different examples, the design changes of the sampling branch structure in different application scenarios are demonstrated. Each example 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.

[0086] The four examples respectively use PI film, PET film, PMMA film and PC film as the covering material of the welding area 1. By comparing the performance of these materials under the same design, the influence of their protection effect on the welding area 1 can be evaluated, as well as their advantages and disadvantages in terms of cost, insulation performance, transparency, etc.

[0087] Each example adopts a different cut 5 design of tin hole 4, and the designs are described in detail on how to increase the amount of tin climbing and prevent the occurrence of tin explosion phenomenon.

[0088] In the description of the utility model, it is understood that the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0089] In the utility model, unless otherwise expressly specified and limited, the first feature is "on" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through an intermediate medium. The meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise expressly limited.

[0090] In the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise expressly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0091] The above is only for illustrating the embodiments of the utility model, and is not used to limit the utility model. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made without creative labor within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A sampling branch structure with a fuse function, characterized by, Comprising a welding area, the edge of which is covered with a film structure; an expansion area, which is a back-shaped expansion structure, and has an insurance structure inside; a tin hole, which is a curved structure.

2. The sampling branch structure with a fuse function according to claim 1, characterized in that: The insurance structure is a fuse, which is partially or entirely designed as a serpentine curve.

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

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

5. The sampling branch structure with a fuse function according to claim 4, characterized in that: The hole row is arranged vertically from top to bottom.

6. The sampling branch structure with a 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.

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