FPC fixing structure applied to power battery and CCS assembly
By designing a fixed latch structure and nickel sheet welding connection on the isolation plate, the problem of FPC's inability to adjust its position and angle in CCS components was solved, achieving stable welding and efficient production of FPC.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGDE UNICONN ELECTRONICS CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-05
AI Technical Summary
Existing FPC fixing solutions cannot adjust the position and angle in CCS components, which increases the difficulty of precise welding between nickel sheets and FPC. Furthermore, traditional fixing methods cannot adapt to the flexibility and foldability of FPC, resulting in unstable welding.
A fixed latch structure is designed on the isolation plate to fix the FPC by snap-fit and limit the movement. Combined with the welding connection between the nickel sheet and the aluminum bar, it provides six degrees of freedom of limit, allowing the FPC to move and bend within a certain range to adapt to the adjustment of subsequent welding operations.
It improves the fixation and welding accuracy of FPC, simplifies the welding process, reduces equipment and parts costs, and enhances production efficiency and space utilization.
Smart Images
Figure CN224328859U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an FPC fixing structure and a CCS assembly, and more particularly to an FPC fixing structure and a CCS assembly applied to a power battery. Background Technology
[0002] FPC (Flexible Printed Circuit) is a type of circuit board made with flexible copper-clad laminate as the substrate. It features high reliability, excellent flexibility, high wiring density, lightweight, thinness, and good bendability. It is widely used for connections in electronic products, and can be freely bent, rolled, and folded, withstanding millions of dynamic bends without damaging the wires, meeting the needs of miniaturization and high-density installation in electronic products.
[0003] CCS (Integrated Busbar) is mainly composed of signal acquisition components (such as FPC, PCB, FFC, etc.), plastic structural parts, copper and aluminum busbars, etc., which are connected into a whole through processes such as hot pressing or riveting to realize the high voltage series and parallel connection of battery cells and the temperature and voltage sampling functions of the battery. CCS integrated busbar uses FPC to replace traditional wire harness connection, which has the advantages of integrated hot pressing molding, good circuit sealing, good weather resistance, simple installation, high degree of automation, high integration, small size, and high safety performance.
[0004] Currently, using FPCs as signal acquisition components in CCS significantly improves the internal space utilization and assembly efficiency of battery packs, making them suitable for mass production and widely used in new energy vehicle batteries and energy storage. However, existing FPC fixing methods generally employ hot riveting or adhesive backing, making it impossible to adjust the position and angle of the FPC once fixed, increasing the difficulty of precise welding connections between the nickel sheet and the FPC. Utility Model Content
[0005] To address the shortcomings of the aforementioned technologies, this invention provides an FPC fixing structure and CCS assembly for use in power batteries.
[0006] To solve the above technical problems, the technical solution adopted by this utility model is: an FPC fixing structure for power batteries, including an isolation plate, a plurality of fixing tongues formed on the surface of the isolation plate, the fixing tongues being folded relative to the plate surface of the isolation plate to form a limiting groove;
[0007] The FPC is laid on the surface of the isolation plate, and the FPC is located in the limiting groove of the fixing tongue through the side edge.
[0008] Preferably, the fixing tongue and the isolation plate are integrally injection molded.
[0009] Preferably, there are four fixing tongues, namely fixing tongue one, fixing tongue two, fixing tongue three and fixing tongue four;
[0010] Fixed latch one and fixed latch two are located on one side of the FPC, and fixed latch three and fixed latch four are located on the other side of the FPC.
[0011] Preferably, fixed latch one and fixed latch two are distributed alternately on the same side, and fixed latch three and fixed latch four are distributed alternately on the same side, and the distance between fixed latch one and fixed latch two is less than the distance between fixed latch three and fixed latch four.
[0012] A CCS component includes the aforementioned FPC mounting structure used in power batteries.
[0013] Preferably, the CCS assembly also includes an aluminum bar and a nickel sheet, with the nickel sheet welded to the aluminum bar at one end and to the FPC at the other end.
[0014] Preferably, the aluminum bar is installed in the aluminum bar groove, and the aluminum bar groove is integrally connected to the isolation plate on the open side.
[0015] Preferably, the nickel sheet extends from one side opening of the aluminum bar groove to the location of the FPC and is welded to the FPC.
[0016] Preferably, aluminum bar tongues for limiting and fixing the aluminum bar are formed on the three side walls of the aluminum bar groove.
[0017] This utility model discloses an FPC fixing structure and CCS assembly for power batteries. In the CCS assembly, a fixing structure with a fixing tab is cleverly used to fix the FPC. Because it can adapt to a certain range of movement and bending, it provides more operational flexibility for subsequent welding operations. Workers can more easily adjust the position and angle of the FPC, ensuring the accuracy and strength of the welding between the nickel sheet and the FPC. Furthermore, the efficient combination of degree-of-freedom constraints simplifies the welding process, saves time, and improves production efficiency. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the FPC fixing structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the structure of the CCS component of this utility model.
[0020] Figure 3 for Figure 2 Top view.
[0021] Figure 4 for Figure 2 Side view.
[0022] In the diagram: 1. Isolation plate; 2. Fixing latch; 21. Limiting groove; 2a. Fixing latch one; 2b. Fixing latch two; 2c. Fixing latch three; 2d. Fixing latch four; 3. FPC; 4. Aluminum bar; 5. Nickel sheet; 6. Aluminum bar groove; 7. Aluminum bar latch. Detailed Implementation
[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0024] Example 1
[0025] This embodiment discloses an FPC fixing structure for power batteries. The FPC fixing structure achieves ingenious fixing of the FPC by forming a fixing tongue structure on the separator plate 1.
[0026] FPC, or Flexible Printed Circuit, is characterized by its flexibility and foldability, which are key factors in its widespread application in electronic devices. This embodiment utilizes the flexibility and foldability of FPC by designing a fixing tab 2 on the isolation plate 1.
[0027] Specifically, such as: Figure 1 As shown, several fixing tongues 2 are formed on the surface of the partition plate 1. Usually, the fixing tongues are integrally injection molded during the molding of the partition plate 1, so that the fixing tongues 2 are folded relative to the plate surface of the partition plate 1 to form a limiting groove 21.
[0028] For FPC3, it is laid on the surface of the partition plate 1, and FPC3 is located in the limiting groove 21 of the fixing tongue 2 through the side edge.
[0029] Compared with existing technologies, the above-mentioned fixing structure that uses a fixed latch to hold the FPC has the following technical advantages:
[0030] The fixing tongue 2 uses a snap-fit limiting method to fix the FPC, and at the same time, it is physically fixed by welding the FPC3 to the nickel sheet 5 and other circuit components, so that the FPC can be fixed stably and firmly.
[0031] Because FPC is flexible and foldable, it can be fixed by the fixing tab 2 while adapting to a certain range of movement and bending. Compared with the traditional situation where stress is concentrated at the solder joint, this can reduce the risk of FPC being damaged by bumps during the transportation of CCS components.
[0032] The fixed latch 2 structure provides six degrees of freedom for positioning, meaning the FPC can be flexibly positioned in three linear directions (X, Y, Z axes) and three rotational directions (roll, pitch, yaw) in space. This provides more operational flexibility for subsequent welding operations, and the six degrees of freedom make the subsequent nickel sheet welding process smoother. During welding, workers can more easily adjust the position and angle of the FPC, ensuring the accuracy and strength of the weld between the nickel sheet and the FPC. This efficient combination of degree-of-freedom constraints simplifies the welding process, saves time, and improves production efficiency.
[0033] Example 2
[0034] This embodiment discloses an FPC fixing structure for power batteries. Based on the structure disclosed in Embodiment 1, the setting of the fixing tongue 2, which is integrally injection molded with the separator plate 1, is further optimized.
[0035] Preferably, there are four fixing tongues 2. For ease of description, as follows: Figure 1 and Figure 2 As shown, they are named Fixed Tongue 1 2a, Fixed Tongue 2 2b, Fixed Tongue 3 2c and Fixed Tongue 4 2d respectively;
[0036] Among them, fixed latch 1 2a and fixed latch 2b are distributed on one side of FPC3, and fixed latch 3 2c and fixed latch 4 2d are distributed on the other side of FPC3. Furthermore, fixed latch 1 2a and fixed latch 2b on the same side are distributed alternately, and fixed latch 3 2c and fixed latch 4 2d on the same side are distributed alternately. The distance between fixed latch 1 2a and fixed latch 2b is smaller than the distance between fixed latch 3 2c and fixed latch 4 2d, so that the four fixed latches are distributed at different positions of FPC for limiting and fixing, thereby improving the fixing effect.
[0037] Example 3
[0038] This embodiment discloses a CCS component, which uses the FPC fixing structure disclosed in Embodiment 1 to fix the FPC.
[0039] like Figure 2-4 As shown, the CCS assembly in this embodiment also includes an aluminum bar 4, a nickel sheet 5, and an aluminum bar tank 6.
[0040] Among them, the aluminum bar 4 serves as a conductive component for current transmission between cells or modules; the CCS component disclosed in this embodiment uses an aluminum bar groove 6 structure for installation of its aluminum bar 4.
[0041] like Figure 2 and Figure 4As shown, the aluminum bar groove 6 is integrally connected to the partition plate 1 on the opening side. That is, the aluminum bar groove 6 is integrally injection molded during the molding process of the partition plate 1. The aluminum bar 4 is installed in the aluminum bar groove 6. At the same time, aluminum bar tongues 7 are formed on the three side walls of the aluminum bar groove 6 for limiting and fixing the aluminum bar 4. Thus, the aluminum bar 4 is limited and fixed in the aluminum bar groove 6 by using the aluminum bar tongues 7.
[0042] Nickel sheet 5 is used for the circuit connection between aluminum bar 4 and FPC3, providing good conductivity for current flow. Nickel sheet 5 is welded to aluminum bar 4 at one end, and extends from one side opening of aluminum bar groove 6 to the location of FPC3 at the other end and is welded to FPC3.
[0043] The welding connection between nickel sheet 5 and FPC3 not only achieves circuit connection but also serves as a physical fixation. By welding, the FPC and nickel sheet are connected. The high temperature during the welding process creates a strong connection between the nickel sheet and the FPC, effectively reducing the possibility of the FPC falling off or moving due to external force or vibration.
[0044] Furthermore, the FPC can be soldered to other circuit components (such as NTC, connectors, etc.). The tight connection provided, together with the function of the fixing tab 2, can further enhance the stability of the FPC after soldering.
[0045] In addition, the fixed latch 2 provides six degrees of freedom for limiting the position, providing more room for operation in subsequent welding operations, thereby ensuring the accuracy and firmness of welding between the nickel sheet or other circuit components and the FPC. The quality of welding directly affects the stability of the circuit. Reliable welding will ensure the normal operation of the FPC during long-term use and reduce the failure rate.
[0046] In summary, this invention cleverly integrates the FPC into the fixing tongue structure of the separator plate, utilizing its flexible and foldable characteristics to design a limiting mechanism that provides six degrees of freedom. This not only improves the fixation of the FPC but also facilitates the subsequent nickel sheet welding process. Furthermore, after welding, it effectively enhances the overall weld strength. Compared to traditional fixing methods, this invention's structural design is more ingenious, significantly improving space utilization efficiency and thus greatly enhancing the energy density of the PACK. In addition, this invention successfully solves the problem of difficult FPC fixation in CCS solutions. This invention eliminates the need for adhesive backing and hot riveting, and avoids the need for additional parts for fixing, reducing component costs and the investment cost of new equipment. It also eliminates the need for additional equipment for processing; by reducing the use of equipment and processes, it effectively reduces the overall cost of equipment development.
[0047] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.
Claims
1. An FPC fixing structure for use in power batteries, characterized in that: It includes a partition plate (1), and a plurality of fixing tongues (2) are formed on the surface of the partition plate (1). The fixing tongues (2) are folded relative to the plate surface of the partition plate (1) to form a limiting groove (21). FPC (3) is laid on the surface of the partition plate (1), and FPC (3) is located in the limiting groove (21) of the fixing tongue (2) through the side edge.
2. The FPC fixing structure for power batteries according to claim 1, characterized in that: The fixed latch (2) and the isolation plate (1) are integrally injection molded.
3. The FPC fixing structure for power batteries according to claim 2, characterized in that: There are four fixed latches (2), namely fixed latch one (2a), fixed latch two (2b), fixed latch three (2c) and fixed latch four (2d); The fixed latch one (2a) and fixed latch two (2b) are distributed on one side of the FPC (3), and the fixed latch three (2c) and fixed latch four (2d) are distributed on the other side of the FPC (3).
4. The FPC fixing structure for power batteries according to claim 3, characterized in that: Fixed latch one (2a) and fixed latch two (2b) are distributed alternately on the same side, and fixed latch three (2c) and fixed latch four (2d) are distributed alternately on the same side. The distance between fixed latch one (2a) and fixed latch two (2b) is less than the distance between fixed latch three (2c) and fixed latch four (2d).
5. A CCS component, characterized in that: It includes the FPC fixing structure for use in power batteries as described in any one of claims 1-4.
6. The CCS component according to claim 5, characterized in that: The CCS assembly also includes an aluminum bar (4) and a nickel sheet (5), the nickel sheet (5) being welded to the aluminum bar (4) at one end and to the FPC (3) at the other end.
7. The CCS component according to claim 6, characterized in that: The aluminum bar (4) is installed in the aluminum bar groove (6), and the aluminum bar groove (6) is integrally connected to the isolation plate (1) on the opening side.
8. The CCS component according to claim 7, characterized in that: The nickel sheet (5) extends from one side opening of the aluminum bar groove (6) to the location of the FPC (3) and is welded to the FPC (3).
9. The CCS component according to claim 7, characterized in that: The three side walls of the aluminum bar groove (6) are respectively formed with aluminum bar tongues (7) for limiting and fixing the aluminum bar (4).