Battery sampling branch structure

Abstract

The utility model discloses a battery sampling branch structure, which comprises a copper foil base material, the middle part of the copper foil base material is hollow, and the back surface of the copper foil base material is provided with an insulating layer window; the reinforcing patch is attached to the back face of the copper foil base material, and the attached face of the reinforcing patch or the back face of the copper foil base material is brushed with conductive adhesive so as to form conductive connection between the reinforcing patch and the copper foil base material; wherein the reinforcing patch is fixedly connected with the insulating layer window through laser welding, the sampling branch structure additionally provided with the reinforcing patch has certain rigidity, and deformation is effectively avoided; the welding mode is laser welding, the welding strength is high, and the welding time efficiency is high; and dispensing reinforcement is not needed, so that the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery sampling branch structure technology, specifically a battery sampling branch structure. Background Technology

[0002] In the design and manufacturing of battery sampling branch structures, although various technical solutions exist, each solution faces some common challenges and problems. These problems not only affect the production efficiency and quality stability of the product, but may also increase production costs and complexity.

[0003] First, the welding area and connection parts of the sampling branches are prone to deformation. This may be due to thermal or mechanical stress generated during the welding process. Deformation not only affects the appearance quality of the product but may also adversely affect subsequent manufacturing processes, such as assembly difficulties and poor contact.

[0004] Secondly, low connection strength with aluminum or other metal components is a common problem. This may be due to improper selection of welding materials, welding processes, or welding parameters. Low connection strength can lead to loosening, detachment, or breakage during long-term use, thus affecting battery performance and safety.

[0005] Furthermore, to improve connection strength or prevent defects during the welding process, additional reinforcement measures are often required, such as adhesive application, coating, or increasing the welding area. These measures not only increase production costs and complexity but may also negatively impact product reliability and stability.

[0006] In addition, low welding time efficiency is also a problem that cannot be ignored. In large-scale production, welding time efficiency directly affects the production cycle and cost of products. If the welding process is too complex or takes too long, it will be difficult to meet market demands and cost control requirements.

[0007] In summary, the design and manufacturing of battery sampling branch structures presents numerous challenges and problems, including deformation, low connection strength, the need for additional reinforcement measures, and low welding efficiency. Overcoming these challenges requires continuous exploration and innovation to develop more efficient, reliable, and economical manufacturing solutions. This may involve research and practice in areas such as improving welding processes, optimizing material selection, and enhancing automation levels. Summary of the Invention

[0008] To overcome the shortcomings of existing technical solutions, this utility model provides a battery sampling branch structure, which can effectively solve the problems of easy deformation during welding, insufficient strength of the connecting aluminum bar, need for additional reinforcement, complex overall welding process, and low production efficiency of the battery sampling branch structure proposed in the background technology.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a battery sampling branch structure, including: a copper foil substrate, wherein the copper foil substrate has a hollow center and an insulating layer window is provided on the back;

[0010] A reinforcing patch is attached to the back of a copper foil substrate. The attaching surface of the reinforcing patch or the back of the copper foil substrate is coated with conductive adhesive to form a conductive connection between the reinforcing patch and the copper foil substrate.

[0011] The reinforcing patch is fixedly connected to the window in the insulation layer by laser welding.

[0012] Furthermore, it also includes a wiring area, which is set around the copper foil cutout area and extends beyond the insulation layer window area.

[0013] Furthermore, it also includes a hot-pressing area, which is disposed on the back side of the copper foil substrate and surrounds the copper foil cutout area.

[0014] Furthermore, the hot-pressed area is a rounded rectangle.

[0015] Furthermore, the reinforcing patch comprises at least one of stainless steel sheet, copper sheet, nickel sheet, aluminum sheet, and titanium sheet.

[0016] Furthermore, the bonding surface of the reinforcing patch completely covers or extends beyond the windowed area of ​​the insulation layer.

[0017] Furthermore, the conductive adhesive is laid out in a hollow rectangular shape and completely covers or extends beyond the windowed area of ​​the insulating layer.

[0018] Furthermore, the width of the conductive adhesive after it is laid out is greater than 1 mm.

[0019] Furthermore, the thickness of the conductive adhesive after being laid flat is less than 2 mm.

[0020] An integrated busbar includes the aforementioned battery sampling branch structure.

[0021] Compared with the prior art, the advantages of this utility model are: the sampling branch structure with added reinforcing patch has a certain rigidity, effectively avoiding deformation; the welding method is laser welding, which has high welding strength and high welding efficiency; and no glue reinforcement is required, reducing costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 The structural three-dimensional representation of this utility model Figure 1 ;

[0024] Figure 3 The structural three-dimensional representation of this utility model Figure 2 ;

[0025] Figure 4 This is a cross-sectional view of the structure of this utility model;

[0026] Figure 5 This is a three-dimensional view of the integrated busbar of this utility model.

[0027] Numbering on the map:

[0028] 1-Copper foil substrate, 2-Reinforcing patch, 3-Tracking area, 4-Insulation layer opening, 5-Conductive adhesive, 6-Cutout, 7-Hot pressing area. Detailed Implementation

[0029] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0030] 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.

[0031] like Figure 1-5 As shown, this utility model provides a battery sampling branch structure, including: a copper foil substrate 1, the copper foil substrate 1 has a hollow center and an insulating layer window 4 on the back, the insulating layer window 4 is used to expose a part of the copper foil;

[0032] Reinforcing patch 2 is attached to the back of copper foil substrate 1. The bonding surface of reinforcing patch 2 or the back of copper foil substrate 1 is coated with conductive adhesive 5 to form a conductive connection between reinforcing patch 2 and copper foil substrate 1, so that the product body has a certain rigidity and is capable of laser welding.

[0033] Among them, the reinforcing patch 2 is fixedly connected to the window 4 of the insulating layer by laser welding.

[0034] The reinforcing patch 2 forms a conductive connection with the copper foil substrate 1 via the conductive adhesive 5, enhancing the connection strength between the copper foil substrate 1 and subsequent electronic components or circuit boards, and reducing the risk of copper foil detachment or damage during soldering. The reinforcing patch 2 provides additional support for the copper foil substrate 1, increasing the board's support for it and improving the overall structure's impact resistance. The use of the reinforcing patch 2 helps improve the overall reliability and stability of the battery sampling branch structure, ensuring that the battery maintains stable performance during long-term use.

[0035] Laser welding enables a high-precision fixed connection between the reinforcing patch 2 and the insulating layer window 4, ensuring accurate positioning and a firm connection between the two.

[0036] Laser welding is characterized by high speed and high heat, but the welding process is very short. In addition, the laser soldering machine is equipped with temperature control function, so the thermal impact on the copper foil substrate 1 and the insulating layer is small, reducing the thermal damage and deformation that may occur during the welding process.

[0037] Through laser welding, a tight connection is formed between the reinforcing patch 2 and the insulating layer window 4, which improves the sealing performance of the entire structure and prevents interference and corrosion from the external environment.

[0038] Laser welding not only achieves the mechanical connection between the reinforcing patch 2 and the insulating layer window 4, but also ensures the conductive connection between the reinforcing patch 2 and the copper foil substrate 1 through the conductive adhesive 5, thereby guaranteeing the electrical performance of the battery sampling branch structure.

[0039] Furthermore, it also includes a wiring area 3, which is set around the copper foil cutout area and extends beyond the insulation layer window area 4.

[0040] The routing area 3 provides sufficient space for the battery sampling lines to be arranged, avoiding crossovers and interference between lines, thereby ensuring stable signal transmission and helping to reduce faults and performance degradation caused by improper wiring.

[0041] The copper foil cutout area is used to connect the battery management controller and the battery information collector. The wiring area 3 surrounds the cutout area, providing additional protection.

[0042] Furthermore, it also includes a hot-pressing area 7, which is disposed on the back side of the copper foil substrate 1 and surrounds the copper foil cutout area. It is used to ensure the accurate positioning of the reinforcing patch by hot pressing during the bonding of the reinforcing patch, prevent misalignment, and enhance the bonding strength.

[0043] During the bonding process of the reinforcing patch, the hot-pressing area 7, under high temperature and high pressure, ensures that the reinforcing patch is accurately bonded to the predetermined position on the copper foil substrate 1. The combined effect of high temperature and high pressure during hot pressing results in a strong bond between the reinforcing patch and the copper foil substrate 1. This not only enhances the bonding strength but also effectively prevents potential misalignment of the reinforcing patch during use, which helps maintain the stability and reliability of the battery sampling branch structure.

[0044] Furthermore, the hot-pressing region 7 is a rounded rectangle.

[0045] The design of rounded rectangles can more effectively disperse stress and reduce structural damage caused by stress concentration.

[0046] The rounded rectangle shape is easier to process and position during production. This design simplifies the production process, improves production efficiency, and reduces production errors and cost increases caused by the complexity of the shape.

[0047] The rounded rectangular heat-pressing area 7 design ensures enhanced patch precision during the bonding process. Due to the more regular shape of the rounded rectangle, precise alignment and positioning are easier to achieve during bonding, thus improving the accuracy and reliability of the bonding process.

[0048] Furthermore, the reinforcing patch 2 comprises at least one of stainless steel sheet, copper sheet, nickel sheet, aluminum sheet, and titanium sheet.

[0049] Stainless steel sheet: Stainless steel is widely used due to its excellent corrosion resistance; when laser welding stainless steel sheets, the weld is smooth and beautiful, and the welding strength is high.

[0050] Aluminum sheets: Aluminum is highly versatile due to its lightweight and corrosion resistance; although aluminum has a high reflectivity, laser welding technology can still effectively weld aluminum sheets.

[0051] Copper sheet: Copper has good electrical and thermal conductivity and is highly versatile; when laser welding copper sheets, it is necessary to select appropriate welding parameters and processes to ensure weld quality.

[0052] Nickel sheets: Nickel has high corrosion resistance, making it suitable for some specialized fields. When laser welding nickel sheets, attention must be paid to issues such as hot cracking and porosity during the welding process.

[0053] Titanium sheets: Titanium metal sheets are lightweight and high-strength, making them suitable for applications in aerospace, medical, and other fields. When laser welding titanium sheets, appropriate welding methods and protective measures are required to ensure weld quality and strength.

[0054] Furthermore, the bonding surface of the reinforcing patch 2 completely covers or extends beyond the window area 4 of the insulating layer to ensure the conductive connection effect after bonding.

[0055] The bonding surface of the reinforcing patch 2 completely covers the area of ​​the insulating layer window 4, which can ensure that the conductive connection part forms good electrical contact with other parts of the battery sampling branch structure. This helps to reduce contact resistance and improve current transmission efficiency, thereby ensuring the normal operation of the battery system.

[0056] By using a bonding design that extends beyond the window area 4 of the insulation layer, the reinforcing patch 2 not only connects to the conductive parts within the window area 4, but also forms additional connections to the parts surrounding the window area. This design increases the redundancy of connections and improves fault tolerance.

[0057] The bonding surface of the reinforcing patch 2 completely covers or extends beyond the area of ​​the insulating layer window 4, which also helps to enhance the durability of the battery sampling branch structure. The reinforcing patch 2 provides better mechanical support, reducing the risk of connection loosening or breakage due to external stress or vibration.

[0058] Furthermore, the conductive adhesive 5 is laid flat in a hollow rectangular shape and completely covers or extends beyond the window area 4 of the insulating layer to ensure the conductive connection effect after bonding.

[0059] The conductive adhesive 5 is laid out in a hollow rectangular shape and completely covers the window area 4 of the insulating layer, ensuring good electrical contact between the conductive connection and other parts of the battery sampling branch structure. This design reduces the problem of increased contact resistance caused by incomplete conductive connections, thereby improving current transmission efficiency.

[0060] The conductive adhesive 5 not only covers the windowed area 4 of the insulating layer, but also extends beyond that area, forming an additional connection area. This design increases the redundancy of the connection, so that even if some connection points become loose or fail due to external factors (such as vibration, temperature changes, etc.), the stability of the conductive connection can be maintained through other connection points.

[0061] The flat, laid-out state of the conductive adhesive 5 and its design extending beyond the window area 4 of the insulation layer provide additional mechanical support for the battery sampling branch structure. This helps reduce the risk of loosening or breakage of connections due to external stress or vibration, thereby improving the durability of the structure.

[0062] Furthermore, the width of the conductive adhesive 5 after being laid out is greater than 1 mm.

[0063] The conductivity of conductive adhesive 5 is related to its spreading area. When the width of conductive adhesive 5 after spreading is greater than 1 mm, it can form a larger conductive contact area, thereby effectively reducing contact resistance and improving conductivity.

[0064] Furthermore, the thickness of the conductive adhesive 5 after being laid flat is less than 2 mm.

[0065] The primary function of conductive adhesive 5 is conductivity, and its conductivity is related to the thickness of the adhesive layer. Although thickness affects resistivity (generally, the thinner the layer, the lower the resistivity), in practical applications, a thickness of less than 2 mm is usually sufficient to ensure good conductive connections. This thickness of conductive adhesive 5 can effectively fill the tiny gaps between electronic components, forming a continuous conductive path and ensuring stable current transmission.

[0066] In precision electronic assembly, there are strict requirements for the thickness of the conductive adhesive 5. A thickness of less than 2 mm allows the conductive adhesive 5 to adapt more flexibly to various complex structures and tiny spaces, ensuring precise connections between electronic components. This thickness of conductive adhesive 5 not only helps reduce errors during the assembly process but also improves the overall performance and reliability of electronic products.

[0067] An integrated busbar includes a battery sampling branch structure as claimed in any one of claims 1-9.

[0068] The integrated busbar with added reinforcing patch 2 has a certain rigidity in its sampling branch structure, effectively preventing deformation; the welding method is laser welding, which has high welding strength and high welding efficiency; and no glue reinforcement is required, reducing costs. Example 1

[0069] The battery sampling branch structure of this embodiment includes a copper foil substrate 1 with a hollowed-out area in the middle and an insulating layer window 4 on its back to expose part of the copper foil. A reinforcing patch 2, made of stainless steel, is attached to the back of the copper foil substrate 1 and forms a conductive connection with the copper foil substrate 1 using conductive adhesive 5 (laid out in a hollow rectangular shape, 1.5 mm wide and 1 mm thick). The bonding surface of the reinforcing patch 2 completely covers the area of ​​the insulating layer window 4. In addition, the structure includes a wiring area 3, which surrounds the hollowed-out area of ​​the copper foil and extends beyond the area of ​​the insulating layer window 4. The reinforcing patch 2 is fixedly connected to the insulating layer window 4 by laser welding to ensure the stability and sealing of the structure.

[0070] Differences:

[0071] The reinforcing patch 2 is made of stainless steel.

[0072] The conductive adhesive 5 is laid flat in a hollow rectangular shape, with a width of 1.5 mm and a thickness of 1 mm.

[0073] Advantages:

[0074] Stainless steel sheets have good corrosion resistance and high strength, making them suitable for a variety of environments.

[0075] The conductive adhesive 5 is of a suitable size, which ensures conductivity while controlling costs.

[0076] The structure is relatively simple and easy to manufacture and assemble. Example 2

[0077] The battery sampling branch structure in this embodiment is similar to that in Embodiment 1, but the reinforcing patch 2 uses a copper sheet. The hot-pressing area 7 is located on the back of the copper foil substrate 1, surrounding the copper foil cutout area, and is a rounded rectangle. During the bonding of the reinforcing patch, hot pressing ensures accurate positioning, prevents misalignment, and enhances bonding strength. The conductive adhesive 5 is also laid flat in a hollow rectangular shape, completely covering the insulating layer window area 4, with a width of 2 mm and a thickness of 1.5 mm, to ensure good conductive connection.

[0078] Differences:

[0079] The reinforcing patch 2 uses a copper metal sheet.

[0080] A hot-pressing area 7 is set up, which is a rounded rectangle.

[0081] The conductive adhesive 5 is laid flat in a hollow rectangular shape, with a width of 2 mm and a thickness of 1.5 mm.

[0082] Advantages:

[0083] Copper sheets have good electrical and thermal conductivity, which helps to improve the overall performance of the battery sampling branch structure.

[0084] The hot-pressing area 7 improves the bonding accuracy and strength between the reinforcing patch 2 and the copper foil substrate 1.

[0085] The larger size of conductive adhesive 5 provides a more reliable conductive connection. Example 3

[0086] In this embodiment, the battery sampling branch structure uses a nickel metal sheet as a reinforcing patch 2. The arrangement of the copper foil substrate 1, the insulating layer window 4, and the reinforcing patch 2 is similar to that in Embodiment 1. The difference is that the bonding surface of the reinforcing patch 2 extends beyond the area of ​​the insulating layer window 4, and the width of the conductive adhesive 5 after being laid flat is 1 mm, but the thickness is 0.8 mm, in order to improve the flexibility of the structure while ensuring conductivity.

[0087] Differences:

[0088] The reinforcing patch 2 uses a nickel metal sheet.

[0089] The bonding surface of the reinforcing patch 2 extends beyond the area of ​​the window 4 in the insulation layer.

[0090] The conductive adhesive 5 has a width of 1 mm after being laid flat, but a thickness of 0.8 mm.

[0091] Advantages:

[0092] Nickel metal sheets have high corrosion resistance and strength.

[0093] The bonding surface of the reinforcing patch 2 extends beyond the window area 4 of the insulating layer, increasing the bonding surface and thus improving the overall strength of the copper foil substrate 1.

[0094] The conductive adhesive 5 is thinner, which improves the flexibility of the structure. Example 4

[0095] In this embodiment, the battery sampling branch structure uses an aluminum sheet as a reinforcing patch 2. The copper foil substrate 1 has a hollow center and an insulating layer window 4 on its back. The reinforcing patch 2 is electrically connected to the copper foil substrate 1 via conductive adhesive 5 (1.2 mm wide and 1 mm thick). To improve bonding accuracy and strength, a hot-pressing area 7 with rounded corners is provided. The reinforcing patch 2 is fixedly connected to the insulating layer window 4 by laser welding, ensuring structural stability and sealing. Furthermore, the design of the wiring area 3 emphasizes avoiding wire crossings and interference.

[0096] Differences:

[0097] The reinforcing patch 2 is made of aluminum sheet.

[0098] A hot-pressing area 7 is set up, which is a rounded rectangle.

[0099] The conductive adhesive 5 is laid flat in a hollow rectangular shape, with a width of 1.2 mm and a thickness of 1 mm.

[0100] Advantages:

[0101] The lightweight and corrosion-resistant aluminum sheet helps reduce the weight of the battery sampling branch structure.

[0102] The hot-pressing zone 7 improves bonding accuracy and strength.

[0103] The conductive adhesive 5 is of a suitable size, which ensures conductivity while controlling costs. Example 5

[0104] In this embodiment, the battery sampling branch structure uses a titanium sheet as the reinforcing patch 2. The arrangement of the copper foil substrate 1, the insulating layer window 4, and the reinforcing patch 2 is similar to other embodiments. The conductive adhesive 5 is laid flat in a hollow rectangular shape, with a width of 1.8 mm and a thickness of 1.2 mm, to ensure good conductive connection and structural durability. The hot-pressing area 7 is also set as a rounded rectangle to improve bonding accuracy and strength. The reinforcing patch 2 is fixedly connected to the insulating layer window 4 by laser welding to ensure the stability and sealing of the entire structure. In addition, this embodiment also pays attention to the coverage relationship between the conductive adhesive 5 and the reinforcing patch 2 and the area of ​​the insulating layer window 4 to ensure the conductive connection effect after bonding.

[0105] Differences:

[0106] The reinforcing patch 2 is made of titanium metal sheet.

[0107] The conductive adhesive 5 is laid flat in a hollow rectangular shape, with a width of 1.8 mm and a thickness of 1.2 mm.

[0108] The hot-pressing area 7 is set as a rounded rectangle.

[0109] Pay attention to the coverage relationship between conductive adhesive 5 and reinforcing patch 2 and the windowed area of ​​the insulating layer 4.

[0110] Advantages:

[0111] Titanium sheets are lightweight and high-strength, making them suitable for applications with strict requirements on weight and strength.

[0112] The larger size of conductive adhesive 5 provides more reliable conductive connections and structural durability.

[0113] The overlapping relationship between the hot-pressed area 7 and the conductive adhesive 5 ensures the conductive connection effect after bonding, improving the stability and sealing of the battery sampling branch structure.

[0114] In the description of this utility model, it should be understood that the terms "middle", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0115] In this invention, unless otherwise expressly specified and limited, the first feature "on" the second feature may be in direct contact with the first feature, or indirect contact with the first feature through an intermediate medium. "A plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0116] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0117] The above description is merely illustrative of the embodiments of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model without creative labor should be included within the protection scope of this utility model.

Claims

1. A battery sampling branch structure, characterized in that, include: A copper foil substrate, wherein the copper foil substrate has a hollow center and an insulating layer window on the back; A reinforcing patch is attached to the back of a copper foil substrate. The attaching surface of the reinforcing patch or the back of the copper foil substrate is coated with conductive adhesive to form a conductive connection between the reinforcing patch and the copper foil substrate. The reinforcing patch is fixedly connected to the window in the insulation layer by laser welding.

2. The battery sampling branch structure according to claim 1, characterized in that: It also includes a wiring area, which is set around the copper foil cutout area and extends beyond the insulation layer window area.

3. A battery sampling branch structure according to claim 1 or 2, characterized in that: It also includes a hot-pressing area, which is disposed on the back of the copper foil substrate and overlaps with the conductive adhesive-covered area.

4. The battery sampling branch structure according to claim 3, characterized in that: The hot-pressed area is a rounded rectangle.

5. The battery sampling branch structure according to claim 1, characterized in that: The reinforcing patch comprises at least one of stainless steel sheet, copper sheet, nickel sheet, aluminum sheet, and titanium sheet.

6. The battery sampling branch structure according to claim 1, characterized in that: The bonding surface of the reinforcing patch completely covers or extends beyond the windowed area of ​​the insulation layer.

7. The battery sampling branch structure according to claim 1, characterized in that: The conductive adhesive is laid out in a hollow rectangular shape and completely covers or extends beyond the windowed area of ​​the insulation layer.

8. The battery sampling branch structure according to claim 7, characterized in that: The width of the conductive adhesive after it is laid flat is greater than 1 mm.

9. A battery sampling branch structure according to claim 7 or 8, characterized in that: The thickness of the conductive adhesive after it is laid flat is less than 2 mm.

10. An integrated busbar, characterized in that: Includes the battery sampling branch structure as described in any one of claims 1-9.

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