Automatic welding and assembling device for PTC element special for battery

Abstract

The utility model relates to an automatic welding and assembling device for a special PTC (Positive Temperature Coefficient) element for a battery, the device is used for welding and assembling the special PTC element for the battery, the element is formed by stacking and welding a first nickel strap, a second nickel strap and a middle chip, and a sandwich structure which is staggered in position and is not completely overlapped exists among the structures; the device comprises a rolled nickel cutting assembly, a solder paste coating assembly, a chip feeding assembly, a welding heating assembly, an element clamping assembly, a guide rail and a comprehensive control system. According to the utility model, after one end of the chip is welded with the first nickel strap on the first guide rail through the element clamping assembly, the other end of the chip is welded with the second nickel strap by replacing the element clamping assembly, so that the special PTC element for the battery with a staggered sandwich structure is formed, and the technical scheme solves the problems that the traditional special PTC element for the battery is large in welding investment and high in welding efficiency. The problems of inconvenience in personalized customization, low efficiency of full-manual operation and double nickel straps with overlapped nickel sheets are solved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an automatic welding and assembly device for battery-specific PTC elements. Background Technology

[0002] PTC is a positive temperature coefficient thermistor with conductivity and a resistance step characteristic within a certain temperature range. It is manufactured into various packages and widely used for overcurrent and overheat protection in electronic circuits. Battery-specific PTCs are electronic components with a staggered sandwich structure, consisting of an upper nickel strip (first nickel strip), a lower nickel strip (second nickel strip), and an intermediate chip, which are stacked and welded together. It has a simple structure, small size, and a thickness of less than 1 mm, with the nickel strips at both ends having a thickness of less than 0.3 mm. Currently, the assembly and production process involves brushing solder onto the upper and lower nickel strips, then positioning and stacking them with the intermediate chip in sequence through a template. The entire template is then passed through a reflow oven to melt the solder, thus welding them together.

[0003] However, traditional battery-specific PTC welding requires pre-cutting the nickel strip into small pieces, and then designing a welding template according to the customer's PTC product length. This is inconvenient, as each change in the customer's product length necessitates redesigning the welding template, resulting in high investment, inconvenience for customization, extreme inflexibility, and low efficiency due to manual operation. Furthermore, the small pieces of nickel strip are prone to overlapping when workers place them into the template, leading to the risk of double nickel strips in the produced components. If customers use such defective PTC components with double nickel strips, the battery pack may be at risk of open circuits.

[0004] Therefore, existing technologies have shortcomings and need to be improved. Summary of the Invention

[0005] This application provides an automated welding and assembly device for battery-specific PTC components. This addresses the problems of traditional battery-specific PTC welding, which requires pre-cutting nickel strips into small pieces and designing welding templates based on the customer's PTC product length. This process is inconvenient, requires redesigning the welding template for every change in product length, involves significant investment, is not suitable for customization, is inflexible, and suffers from low efficiency due to manual operation. Simultaneously, it completely solves the defect problem associated with dual-nickel strips.

[0006] In the first aspect, this application provides an automatic welding and assembly device for battery-specific PTC components, comprising a first nickel strip, a second nickel strip, an intermediate chip, a nickel roll cutting assembly, a solder paste application assembly, a chip feeding assembly, a welding heating assembly, an component clamping assembly, a guide rail, and an integrated control system. The first nickel strip, the second nickel strip, and the intermediate chip of the battery-specific PTC component have a positional misalignment and are not completely overlapping sandwich structures.

[0007] Optionally, the nickel coil cutting assembly includes a nickel coil hanging turntable, a nickel strip directional guide tunnel, and a cutting blade. The nickel coil hanging turntable includes a variable speed feeding motor that drives the turntable to rotate and a fixing plate that fixes the nickel coil.

[0008] Optionally, the solder paste application assembly includes a solder paste application slide rail and an up-and-down rotating pressure head. A solder paste dispensing bucket is fixed on the extended cantilever of the up-and-down rotating pressure head, and each solder paste dispensing bucket is equipped with a pneumatically controlled valve that can control the amount of solder dispensed.

[0009] Optionally, the feeding assembly includes a feeding device, a chip positioning fixture, and a chip picking mechanism, wherein the chip feeding assembly is slidably mounted on a chip feeding slide rail.

[0010] Optionally, the welding heating assembly includes upper and lower sub-modules, which are openable and closable, and are wrapped with thermally conductive metal on the outside and have heating wires nested inside.

[0011] Optionally, the component clamping assembly is fixed on the guide rail and can move horizontally in parallel.

[0012] Optionally, the guide rail is fixedly connected to a slider, and the component clamping assembly is respectively mounted on the sliders of the two guide rails.

[0013] Optionally, the feeding device has a material-collecting suction nozzle on its slide rail.

[0014] Optionally, a nickel strip feeding roller is fixedly connected above the nickel coil cutting assembly, which can pull the nickel strip along the length of the guide tunnel.

[0015] Optionally, the output terminals of the integrated control system are electrically connected to a first welding position sensor, a coating position sensor, a first clamping sensor, a second clamping position sensor, a second welding position sensor, a material picking sensor, and a chip positioning sensor.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art:

[0017] This application's embodiments, through the above-described technical solution, solve the problems of the traditional method of pre-cutting nickel strips into individual small pieces for battery-specific PTC welding, which requires pre-designing welding templates according to the customer's PTC product length. This method is inconvenient, as each change in the customer's product length necessitates redesigning the welding template, resulting in high investment, inconvenience for personalized customization, extreme inflexibility, and low efficiency due to entirely manual operation. This device also solves the problem of potential double-nickel sheet defects in products caused by traditional processes. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a structural layout diagram of the automatic welding device for dedicated PTC components according to this utility model;

[0022] Figure 2 This is a structural diagram of the chip feeding device of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram showing the structural position of the nickel cutting assembly and welding heating assembly of this utility model;

[0024] Figure 4 This is a structural diagram of the component clamping assembly of this utility model.

[0025] Figure 5 This is a structural diagram of the dedicated PTC element of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] Nickel strips for P1 / P3 and PTC components; solder for H1 / H2; chip for P2 and PTC components;

[0028] D2 / d2, Nickel strip directional guide tunnel; D / d, Coil nickel cutting assembly; D1 / d1, Nickel strip feeding roller; D3 / d3, Coil nickel hanging turntable; D3-1 / d3-1, Variable speed feeding motor; D3-2 / d3-2, Fixed plate; D4 / d4, Cutting blade;

[0029] E / e, Component clamping assembly; F / f, Soldering heating assembly; F1, Upper sub-mold; F2, Lower sub-mold; KA13, First clamping position sensor; A10 / a10, Slider; B / b, Solder paste application assembly; B1 / b1, Solder paste application slide bar; B2 / b2, Up and down rotating pressure head; B3 / b3, Solder paste dispensing bucket; KB1, First solder paste bucket initial position sensor; KB2, First solder paste bucket end position sensor; Kb1, Second solder paste bucket initial position sensor; Kb2, Second solder paste bucket end position sensor;

[0030] A / a, guide rail; KA12, first soldering position sensor; Ka12, second solder paste application position sensor; KA13, first clamp changing position sensor; Ka11, second clamp changing position sensor; K, integrated control system; Ka13, second soldering position sensor; KA11, core removal position sensor;

[0031] C. Chip loading assembly; C1. Chip positioning fixture; KC1. Chip positioning sensing device; C2. Chip loading slide bar; C3. Loading device; C4. Chip suction mechanism; KC2-0. Initial position sensor of chip suction mechanism; KC2-1. Chip release position sensor of pick-up and pick-up mechanism; KC2-2. Chip pick-up position sensor of chip suction mechanism. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0034] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0035] Example:

[0036] This utility model is as follows Figure 1-4As shown, guide rail A is a guide rail with a slider A10. The component clamping assembly E is mounted and fixed on the slider A10. The guide rail A is equipped with a material handling position sensor KA11 belonging to the integrated control system K. The integrated control system K drives A10 to move along guide rail A until it stops at the material handling sensor KA11. At this time, the integrated control system K drives the feeding device C3 to position the chip. Then, the chip picking mechanism C4 picks up the chip and places it in the chip positioning fixture C1. At this time, the chip positioning sensor KC1 located in the chip positioning fixture senses that the chip is in place, and the integrated control system K drives the component clamping assembly E. The telescopic and gripping motors grip and hold the component chip. Then, the integrated control system K drives the nickel strip feeding roller D1 on the first nickel strip cutting assembly D to feed the first nickel strip along the nickel strip directional guide tunnel D2 to the set length. After completing the above actions, the integrated control system K drives the solder paste application assembly B, carrying the solder paste dispensing bucket B3, to move from the initial position KB1 of the first solder paste bucket to the position of the end position sensor KB2 of the first solder paste bucket, and completes the solder paste application above the first nickel strip. After the solder paste application is completed, the solder paste application assembly B, carrying the solder paste bucket, returns to the original position of the sensor KB1. After the solder paste application is completed, the integrated control system K drives the slider. A10, carrying the component clamping assembly E holding the components, moves to the first welding position sensor KA12. Then, the integrated control system K drives the telescopic motor on the component clamping assembly E to complete the stacking of the first nickel strip and chip. Afterward, the integrated control system K drives the upper and lower sub-molds F1 and F2 of the first welding heating assembly to close, completing the bonding, heating, and welding of the first nickel strip, solder paste, and chip. After welding, the three components form the first welded assembly. After welding, the integrated control system K drives the cutting blade D4 on the nickel roll cutting assembly D to cut and separate the first roll of nickel and the first welded assembly. After the telescopic motor on the component clamping assembly E is reset, the integrated control system K continues to drive the slider A10 to move to the first clamping position sensor KA13. At the same time, the integrated control system K drives the slider a10 on another guide rail a to move the second component clamping assembly e to the second clamping sensor Ka11. The telescopic and gripping motors on the component clamping assembly e drive the clamp to clamp the other end of the first welding assembly. Then the component clamping assembly E releases the first welding assembly, and the slider A10 returns to the material handling sensor KA11 with the component clamping assembly E and stops to wait for the next instruction from the integrated control system.The component clamping assembly e, on the second guide rail a, is carried by slider a10 to the solder paste application position sensor Ka12. The integrated control system K drives the slider on the solder paste application assembly b to move the solder paste bucket b3 from Kb1 to Kb2, completing the solder paste application above the first soldering assembly held by the component clamping assembly e. After the solder paste application is completed, the solder paste bucket on the solder paste application assembly b returns to its original position at sensor Kb1. Then, the integrated control system K drives slider a10 on guide rail a to continue moving along the second guide rail a to the second soldering position sensor Ka13. The integrated control system K drives the second nickel strip of the second roll nickel cutting assembly d to be fed along the nickel strip directional guide tunnel d2 to the set length. After completing the above actions, the integrated control system K drives the telescopic motor on the component clamping assembly e to extend the first soldering assembly into the soldering position. Between the heating components f, the second nickel strip and the first welding assembly are stacked. Then, the integrated control system K drives the upper and lower sub-modules of the second welding heating component f to close, completing the bonding, heating, and welding of the second nickel strip, solder paste, and the first welding assembly to form the second welding assembly. After welding, the upper and lower sub-modules f of the second welding heating component open. Then, the telescopic motor on the component clamping component e drives the second welding assembly to move and retract. At the same time, the second roll of nickel strip is synchronously fed along the nickel strip directional guide tunnel d2 to the retracting distance of the telescopic motor. Finally, the integrated control system K drives the second cutting blade d to cut and separate the second roll of nickel and the second welding assembly. Afterward, the integrated control system K controls each motor to return to its initial state, waiting for the next welding cycle, completing one welding process. The final product is attached. Figure 5 The battery-specific PTC element shown is shown.

[0037] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0039] 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a 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 application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0043] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0044] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery dedicated PTC element automatic welding assembly device, the device is used for assembling a battery dedicated PTC element, the element is composed of a first nickel strip, a second nickel strip and an intermediate chip stack welding, a sandwich structure with position misalignment between structures and not completely overlapping, characterized in that: The device comprises a nickel roll cutting assembly (D and d), a tin paste coating assembly (B and b), a chip feeding assembly (C), a welding heating assembly (F and f), a component clamping assembly (E and e), a guide rail (A and a), and a comprehensive control system (K).

2. The automatic welding assembly device for a battery-specific PTC element according to claim 1, characterized by: The nickel roll cutting assembly (D) comprises a nickel roll hanging turntable (D3), a nickel strip directional guide tunnel (D2), a nickel strip feeding roller (D1), and a cutting cutter (D4). The nickel roll hanging turntable (D3) comprises a variable-speed feeding motor (D3-1) for driving the rotation of the turntable and a fixed disc (D3-2) for fixing the nickel roll. The nickel roll cutting assembly (d) is consistent with the structure of (D).

3. The automatic welding assembly device for a battery-specific PTC element according to claim 2, characterized by: The tin paste coating assembly (B) comprises a tin paste coating sliding rod (B1) and an up-down rotating pressure head (B2). A tin paste dispensing barrel (B3) is fixed on the extension cantilever of the up-down rotating pressure head, and a pneumatic control valve capable of controlling the tin output is loaded on each tin paste dispensing barrel. The tin paste coating assembly (b) is consistent with the structure of (B).

4. The automatic welding assembly device for a battery-specific PTC element according to claim 1, characterized by: The chip feeding assembly (C) comprises a feeding device (C3), a chip positioning jig (C1), a chip feeding sliding rod (C2), and a chip suction mechanism (C4). The chip feeding assembly (C) is located on the side of the guide rail (A) and is not installed on the guide rail.

5. The automatic welding assembly device for a battery-specific PTC element according to claim 1, characterized by: The welding heating assembly (F) comprises upper and lower sub-modules (F1 and F2), which can be opened and closed. The outer part is wrapped with heat-conducting metal, and the inner part is nested with heating wires. The heating assembly is located on the side of the nickel roll cutting assembly and in front of the cutting cutter (D4). The nickel strip passes through the opened and closed upper and lower sub-modules. The cutting cutter and the heating assembly do not contact each other. The welding heating assembly (f) is consistent with the structure of (F).

6. The automatic welding assembly device for a battery-specific PTC element according to claim 1, characterized by: The component clamping assembly (E) is fixed on the sliding block (A10) of the guide rail (A), which can move left and right along the guide rail (A). The component clamping assembly (e) is consistent with the structure of (E) and is installed on the sliding block (a10) of the guide rail (a).

7. The automatic welding assembly device for a battery-specific PTC element according to claim 1, characterized by: The guide rail (A and a) is fixedly connected with sliding blocks (A10 and a10) that can move along the guide rail. The component clamping assemblies (E and e) are loaded on the two sliding blocks (A10 and a10) respectively.

8. The automatic welding assembly device for a battery-specific PTC element according to claim 1, characterized by: The nickel roll cutting assembly (D and d) is fixedly connected with a nickel strip feeding roller (D1 and d1) above, which can pull the first and second nickel strips to pass through the guide tunnel (D2 and d2) for a certain length.

9. The automatic welding assembly device for a battery-specific PTC element according to claim 1, characterized by: The output end of the comprehensive control system (K) is electrically connected with a chip in place sensing device (KC1), a core taking position sensor (KA11), a first welding position sensor (KA12), a first clamp changing position sensor (KA13), a second clamp changing position sensor (Ka11), a second solder paste coating position sensor (Ka12), and a first solder paste barrel initial position sensor (KB1), a first solder paste barrel end position sensor (KB2), a second solder paste barrel initial position sensor (Kb1), a second solder paste barrel end position sensor (Kb2), a second welding position sensor (Ka13), a chip suction mechanism initial position sensor (KC2-0), a chip suction mechanism chip suction position sensor (KC2-2), and a chip suction mechanism chip release position sensor (KC2-1).

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