Integrated busbar pressing structure
Through the press-fit structure of the circuit board and the aluminum bar plate, the problems of unstable and high cost of traditional connections are solved, and the stability and miniaturization of the integrated busbar structure are achieved.
Patent Information
- Application Number
- CN202421873897.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The connection structure between traditional FPC and BUSBAR is unstable, which increases process and manufacturing costs, and takes up a large space, which is not conducive to the miniaturization design of integrated busbar structures.
The compressed structure of the circuit board and the aluminum bar sheet is adopted, and the mechanical compressed connection is achieved through the aluminum conductor and the aluminum bar sheet covering the insulating film to avoid the nickel sheet welding process, and the composite insulating film is used to protect and support it, reducing the use of support parts.
It realizes structural stability and cost reduction, reduces volume, which is conducive to the miniaturization design of integrated busbar structure.
Smart Images
Figure CN223079369U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a connection structure of a power battery management system, in particular to an integrated busbar pressing structure. Background Art
[0002] The traditional CCS (integrated busbar) structure mainly includes a plastic support, an FPC (flexible printed circuit) installed on the plastic support, and a busbar made of aluminum bar pieces connected into a whole to realize high-voltage series and parallel connection of battery cells, as well as functions of battery temperature sampling and battery cell voltage sampling. Temperature and voltage are provided to the BMS system (battery management system) through the FPC / PCB and connector components, and it belongs to a part of the BMS system.
[0003] Currently, the connection structure between the FPC and the BUSBAR (busbar) is to weld nickel sheets between the copper-conductor FPC and the aluminum BUSBAR to achieve welded fixed connection, and then place the connected FPC and BUSBAR on the plastic support. The connection between the FPC and the BUSBAR of this structure requires transitional welding through nickel sheets, which not only increases the process and manufacturing costs, but also has an unstable connection structure. At the same time, a specific plastic support is required for structural bearing, and the plastic support also occupies a large space, which is not conducive to the miniaturization design of the integrated busbar structure. Content of the Utility Model
[0004] The utility model provides an integrated busbar pressing structure with simple processing, stable structure and cost saving.
[0005] The integrated busbar pressing structure described in the utility model includes a circuit board and an aluminum bar piece. The circuit board is provided with an aluminum conductor that is bonded and welded to the aluminum bar piece, and a first insulating film and a second insulating film that cover the surfaces of the aluminum conductor and the aluminum bar piece to make the aluminum conductor and the aluminum bar piece closely fit together.
[0006] As a preferred solution of the utility model, the first insulating film and the second insulating film are made of composite materials.
[0007] As a preferred solution of the utility model, the aluminum conductor and the aluminum bar piece are placed in the middle between the first insulating film and the second insulating film, and the edges of the first insulating film and the second insulating film extend around and fit together.
[0008] As a preferred solution of the utility model, the first insulating film and the second insulating film are provided with openings for welding components to the conductor of the aluminum conductor.
[0009] For the integrated busbar pressing structure described above, the circuit board is connected to the aluminum busbar through the aluminum conductor, and then the aluminum conductor and the aluminum busbar are mechanically pressed and connected into one body through the insulating film covered by the aluminum conductor and the aluminum busbar, eliminating the need for the processing procedure of bridging nickel sheets. The processing is simple. The insulating film covering the surfaces of the aluminum conductor and the aluminum busbar can protect the conductors on the circuit board and play a role in fixing and supporting at the same time. Its structure is stable, so there is no need to set specific support parts, reducing the volume and cost, which is beneficial to the miniaturization design of the integrated busbar structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of an integrated busbar pressing structure.
[0011] Figure 2 A schematic cross-sectional view of an integrated busbar pressing structure. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0012] As Figure 1 and Figure 2 shown, an integrated busbar pressing structure includes a circuit board 1 and an aluminum busbar 2. The circuit board is provided with an aluminum conductor 3 that is bonded and welded to the aluminum busbar, and a first insulating film 4 and a second insulating film 5 that cover the surfaces of the aluminum conductor and the aluminum busbar to make the aluminum conductor and the aluminum busbar closely fit together. For the integrated busbar pressing structure described above, the circuit board is connected to the aluminum busbar through the aluminum conductor, and then the aluminum conductor and the aluminum busbar are mechanically pressed and connected into one body through the insulating film covered by the aluminum conductor and the aluminum busbar, eliminating the need for the processing procedure of bridging nickel sheets. The processing is simple. The insulating film covering the surfaces of the aluminum conductor and the aluminum busbar can protect the conductors on the circuit board and play a role in fixing and supporting at the same time. There is no need to set specific support parts, reducing the volume and cost, which is beneficial to the miniaturization design of the integrated busbar structure.
[0013] The first insulating film and the second insulating film are made of composite materials. (Specifically, what composite materials are needed, list several). Specifically, the first insulating film and the second insulating film are composed of PI (polyimide) and hot melt adhesive. Through hot pressing, the hot melt adhesives can bond to each other, which can better cover and fit the aluminum conductor and the aluminum busbar, improving the stability.
[0014] The aluminum conductor and the aluminum busbar are placed in the middle between the first insulating film and the second insulating film. The edges of the first insulating film and the second insulating film extend around and fit together, which can well cover the aluminum conductor and the aluminum busbar completely inside the first insulating film and the second insulating film, improving the stability of the structure, and then trimming the edges by die-cutting.
[0015] The first insulating film and the second insulating film are provided with openings 6 for welding components to the conductors of the aluminum conductor.
Claims
1. An integrated busbar pressing structure, comprising a circuit board (1) and an aluminum bar piece (2), characterized in that, The circuit board is provided with an aluminum conductor (3) that is adhesively welded to the aluminum bus bar, and a first insulating film (4) and a second insulating film (5) that cover the surfaces of the aluminum conductor and the aluminum bus bar to tightly bond the aluminum conductor and the aluminum bus bar together.
2. The integrated busbar pressing structure according to claim 1, wherein The first insulating film and the second insulating film are made of composite materials.
3. The integrated busbar pressing structure according to claim 1, wherein, The aluminum conductor and the aluminum bus bar are placed in the middle between the first insulating film and the second insulating film, and the edges of the first insulating film and the second insulating film extend around and are bonded to each other.
4. The integrated busbar pressing structure according to claim 1, wherein The first insulating film and the second insulating film have openings (6) for soldering components to the conductor of the aluminum conductor.