Sectional type flexible circuit board for CCS
Through the connection between segmented flexible circuit board and PCB board, combined with pin and wave soldering technology, the high production costs and electronic device damage caused by excessive length of existing FPCs are solved, and the production costs and protection of electronic devices are achieved. Effect.
Patent Information
- Application Number
- CN202411715309.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-02-14
AI Technical Summary
The length of existing FPCs is relatively long, resulting in high production costs and low production capacity, and the flexible circuit board panel is prone to damage electronic devices when bent.
The segmented flexible circuit board is adopted, and the adjacent flexible circuit board panel is connected through the PCB board and fixed by pin and wave soldering technology.
Reduces production costs, increases production capacity, and protects electronic devices through hard PCB boards to avoid damage caused by bending of flexible circuit board panels.
Smart Images
Figure CN119450913A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of flexible circuit boards, and in particular relates to a segmented flexible circuit board for CCS. Background Art
[0002] With the development of new energy modules, the length of the acquisition line of new energy modules is getting longer and longer. Correspondingly, the length of FPC is also longer, which is not conducive to production and will increase the manufacturing cost. In order to reduce the manufacturing cost, some FPCs are first made into segmented structures, and then multiple segmented FPCs are transferred into one through PCBA; during the transfer process, FPC and PCBA are welded and fixed by hot pressing. This connection method has high cost and low production capacity. Summary of the invention
[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a segmented flexible circuit board for CCS.
[0004] To achieve the above objectives, the present invention discloses a segmented flexible circuit board for CCS, comprising a plurality of flexible circuit board panels and a PCB board for electrically connecting two adjacent flexible circuit board panels together, at least one of the flexible circuit board panels is provided with a connector, at least one row of first connection holes is provided on both sides of the flexible circuit board panel, and at least one row of second connection holes opposite to the first connection holes is provided on both sides of the PCB board;
[0005] It also includes a pin row, which includes a strip-shaped base and a first pin row and a second pin row respectively arranged on the top and bottom of the strip-shaped base. The pins on the first pin row or the second pin row pass through the first connecting holes and the second connecting holes and are fixed by wave soldering.
[0006] Preferably, the pin header, PCB board and flexible circuit board panel are stacked in sequence from top to bottom.
[0007] Preferably, the diameter of the first connecting hole is 1.3 mm-1.5 mm larger than the diameter of the second connecting hole.
[0008] Preferably, the diameter of the first connecting hole is 1.3 mm larger than the diameter of the second connecting hole.
[0009] Preferably, the bottom port of the first through hole expands outward to form a first guide groove, the diameter of the first guide groove is larger than the diameter of the first through hole, and the bottom of the first guide groove extends to the conductive layer of the PCB board.
[0010] Preferably, the bottom port of the second through hole expands outward to form a second guide groove, the diameter of the second guide groove is larger than the diameter of the second through hole, and the groove bottom of the second guide groove extends to the conductive layer of the flexible circuit board panel.
[0011] Preferably, a position on the PCB board outside the second connection hole is glued and fixed to the flexible circuit board panel.
[0012] Preferably, the flexible circuit board panel and the PCB board are both provided with positioning holes with corresponding positions.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] The segmented flexible circuit board of the present invention is used for CCS, and two adjacent connected flexible circuit board panels are connected by a PCB board. In this way, the electronic devices and detection components originally on the flexible circuit board can be set on the PCB board. Since the PCB board is hard in texture, it can protect the electronic devices and detection components compared with the soft flexible circuit board panel, and avoid damage to the electronic devices and detection components due to bending of the flexible circuit board panel.
[0015] The flexible circuit board panel and the PCB board are connected by pin headers and fixed by wave soldering. Since wave soldering can solder multiple connection points at the same time, it can be mass-produced. At the same time, wave soldering has a high degree of automation, so it has higher welding speed and efficiency than hot pressure welding, and has a higher output rate.
[0016] The pin row includes two pin rows, a first pin row and a second pin row. The two pin row structures enable the pin row to have multiple functions in actual use, are highly practical, and can also reduce costs. Specifically, both pin rows can be used to connect the flexible circuit board panel and the PCB board. When one of the pin rows is damaged, the other pin row can also be connected, and the pin row will not be directly scrapped, which can reduce costs; when one of the pin rows is used to connect the two boards, the other pin row can be connected to other circuit structures to achieve electrical connection, without setting up other circuits to connect with other circuit structures, simplifying the overall structure. At the same time, since the pin rows can be directly connected and plugged in to achieve connection, it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 Schematic diagram of the three-dimensional structure of a segmented flexible circuit board used for CCS in an embodiment;
[0018] Figure 2 for Figure 1 A schematic diagram of a three-dimensional exploded structure of a segmented flexible circuit board for CCS;
[0019] Figure 3 for Figure 1 A cross-sectional view of a segmented flexible circuit board for CCS;
[0020] Figure 4 for Figure 3 A partial schematic diagram of
[0021] Flexible circuit board panel 1; first connection hole 11; first guide groove 12; positioning hole 13;
[0022] PCB board 2; second connecting hole 21; second guiding groove 22;
[0023] Needle row 3; strip-shaped base 31; first needle row 32; second needle row 33;
[0024] AD glue 4. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] A segmented flexible circuit board for CCS, see Figure 1 , including multiple flexible circuit board panels 1, a PCB board 2 and a pin header 3 for electrically connecting two adjacent flexible circuit board panels 1 together, at least one of the flexible circuit board panels 1 is provided with a connector (not shown in the figure), wherein the number of flexible circuit board panels 1 is designed according to their own length and the final required length of the circuit board, the connector can be set on the first or last flexible circuit board panel 1, or the connector can be set on all flexible circuit board panels 1, which can be set as needed and will not be repeated here.
[0027] Wherein, at least one row of first connection holes 11 are respectively arranged on both sides of the flexible circuit board panel 1, and at least one row of second connection holes 21 opposite to the first connection holes 11 are respectively arranged on both sides of the PCB board 2; in this embodiment, see Figure 2-Figure 4 There is one row of connection holes on both sides of the flexible circuit board panel 1 and the PCB board 2. The pin row 3 includes a strip-shaped base 31 and a first pin row 32 and a second pin row 33 respectively arranged at the top and bottom of the strip-shaped base 31. The pins on the first pin row 32 or the second pin row 33 pass through the first connection hole 11 and the second connection hole 21 and are fixed by wave soldering.
[0028] The above-mentioned segmented flexible circuit board for CCS of this embodiment has multiple connected flexible circuit board panels 1, and two adjacent connected flexible circuit board panels 1 are connected by PCB board 2. In this way, the electronic devices and detection components originally on the flexible circuit board can be set on PCB board 2. Since PCB board 2 is hard in texture, it can protect the electronic devices and detection components compared with the soft flexible circuit board panel 1, and avoid damage to the electronic devices and detection components due to the bending of the flexible circuit board panel 1. The flexible circuit board panel 1 and the PCB board 2 are connected by a row of pins 3 and fixed by wave soldering. Since wave soldering can weld multiple connection points at the same time, it can be mass-produced. At the same time, the degree of automation of wave soldering is high, so it has higher welding speed and efficiency than hot pressure welding, and the output rate is higher. The row of pins 3 includes two rows of pins, a first row of pins 32 and a second row of pins 33. The two rows of pins make the row of pins 3 have multiple functions in actual use, strong practicality, and can also reduce costs. Specifically, both pin rows can be used to connect the flexible circuit board panel 1 and the PCB board 2. When one of the pin rows is damaged, the other pin row can also be used for connection, and the pin row 3 will not be directly scrapped, which can reduce costs. When one of the pin rows 3 is used to connect the two boards, the other pin row can be connected to other circuit structures to achieve electrical connection without setting up other circuits to connect to other circuit structures, which simplifies the overall structure. At the same time, since the pin rows can be connected directly by docking and plugging, it is easy to use.
[0029] Since the flexible circuit board panel 1 is soft, during the wave soldering process, if the flexible circuit board panel 1 is bent and deformed, a gap will appear between the flexible circuit board panel 1 and the PCB board 2, and the molten tin can flow to the adjacent connection holes through the gap, resulting in a short circuit problem. To this end, in this embodiment, the pin row 3, the PCB board 2 and the flexible circuit board panel 1 are stacked from top to bottom, that is, the flexible circuit board panel 1 is placed below the PCB board 2, the pin row 3 is above the PCB board 2, and the needles on the pin row 3 pass through the second connection hole 21 and the first connection hole 11 in sequence. During the wave soldering process, since the entire PCB board 2 is a hard board and has a certain mass, under the action of its gravity, the PCB board 2 and the flexible circuit board panel 1 can be kept flat, which greatly alleviates the short circuit problem caused by the gap between the two boards. In addition, since the electronic components and detection components of the segmented flexible circuit board for CCS are arranged on the PCB board 2, the flexible circuit board panel 1 is arranged at the lower position and the PCB board 2 is arranged at the upper position, which can avoid the influence of molten tin on electronic components, protect electronic components, and avoid damage.
[0030] In this embodiment, the diameter of the first connection hole 11 is 1.3mm-1.5mm larger than the diameter of the second connection hole 21. Within this range, the molten tin can smoothly pass through the first connection hole 11 of the flexible circuit board panel 1 into the second connection hole 21 of the PCB board 2, ensuring the welding effect, avoiding the problem of too much molten tin entering the first connection hole 11 due to the large size difference between the two, and the molten tin easily flows into the adjacent holes, causing a short circuit. At the same time, it also avoids the problem of molten tin entering the second connection hole 21 of the PCB board 2 due to the small size difference between the two, which ultimately leads to the problem of cold soldering and poor welding effect. Preferably, the diameter of the first connection hole 11 is 1.3mm larger than the diameter of the second connection hole 21, and this value has the best connection reliability.
[0031] In this embodiment, see Figure 3-Figure 4 , the bottom port of the first through hole expands outward to form a first guide groove 12, the diameter of the first guide groove 12 is larger than the diameter of the first through hole, and the bottom of the first guide groove 12 extends to the conductive layer of the PCB board 2. By setting the first guide groove 12, during the soldering process, the first guide groove 12 can allow workers to clearly know the soldering surface of the flexible circuit board panel 1, which can improve the operation efficiency; after the molten tin enters the first guide groove 12, it is not easy to flow to the adjacent connection holes, which further alleviates the short circuit problem; in addition, the bottom of the first guide groove 12 is the conductive layer of the flexible circuit board panel 1, which increases the contact area between the molten tin and the conductive layer of the flexible circuit board panel 1, that is, increases the solder wetting, which not only improves the connection reliability, but also improves the conductive performance.
[0032] In this embodiment, the bottom port of the second through hole expands outward to form a second guide groove 22, the diameter of the second guide groove 22 is larger than the diameter of the second through hole, and the bottom of the second guide groove 22 extends to the conductive layer of the flexible circuit board panel 1. Similarly, the second guide groove 22 not only plays an indicating role, but also can avoid short-circuit problems, and can also increase solder wetting and improve connection performance.
[0033] In this embodiment, the position outside the second connection hole 21 on the PCB board 2 is glued and fixed to the flexible circuit board panel 1, specifically, it is glued by AD glue 4. The PCB board 2 and the flexible circuit board panel 1 are also glued, which can seal the soldering position and play a sealing role to prevent moisture from entering during use and corroding the solder joints. The step of gluing the PCB board 2 and the flexible circuit board panel 1 is before wave soldering, so that the gluing of the two can maintain a relatively fixed positional relationship between the two, and no relative movement will occur during the wave soldering process, thereby improving the welding effect.
[0034] In this embodiment, the flexible circuit board panel 1 and the PCB board 2 are both provided with corresponding positioning holes 13. The positioning holes 13 are provided to facilitate the assembly of the two, thereby ensuring the assembly effect and efficiency.
[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.
Claims
1. A segmented flexible circuit board for CCS, characterized in that: The invention comprises a plurality of flexible circuit board panels and a PCB board for electrically connecting two adjacent flexible circuit board panels together, at least one of the flexible circuit board panels is provided with a connector, at least one row of first connection holes is provided on both sides of the flexible circuit board panel, and at least one row of second connection holes opposite to the first connection holes is provided on both sides of the PCB board; It also includes a pin row, which includes a strip-shaped base and a first pin row and a second pin row respectively arranged on the top and bottom of the strip-shaped base. The pins on the first pin row or the second pin row pass through the first connecting holes and the second connecting holes and are fixed by wave soldering.
2. The segmented flexible circuit board for CCS according to claim 1, characterized in that: The pin header, PCB board and flexible circuit board panel are stacked in sequence from top to bottom.
3. The segmented flexible circuit board for CCS according to claim 2, characterized in that: The diameter of the first connecting hole is 1.3 mm-1.5 mm larger than the diameter of the second connecting hole.
4. The segmented flexible circuit board for CCS according to claim 3, characterized in that: The diameter of the first connecting hole is 1.3 mm larger than the diameter of the second connecting hole.
5. The segmented flexible circuit board for CCS according to claim 1, characterized in that: The bottom port of the first through hole expands outward to form a first guide groove, the diameter of the first guide groove is greater than the diameter of the first through hole, and the groove bottom of the first guide groove extends to the conductive layer of the PCB board.
6. The segmented flexible circuit board for CCS according to claim 1, characterized in that: The bottom port of the second through hole expands outward to form a second guide groove, the diameter of the second guide groove is greater than the diameter of the second through hole, and the groove bottom of the second guide groove extends to the conductive layer of the flexible circuit board panel.
7. The segmented flexible circuit board for CCS according to claim 1, characterized in that: The position of the PCB board located outside the second connection hole is glued and fixed to the flexible circuit board panel.
8. The segmented flexible circuit board for CCS according to claim 7, characterized in that: The flexible circuit board panel and the PCB board are both provided with positioning holes at corresponding positions.