CN113068297B - FFC structure, production method thereof and power battery connector - Google Patents
FFC structure, production method thereof and power battery connector Download PDFInfo
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- CN113068297B CN113068297B CN202110281148.7A CN202110281148A CN113068297B CN 113068297 B CN113068297 B CN 113068297B CN 202110281148 A CN202110281148 A CN 202110281148A CN 113068297 B CN113068297 B CN 113068297B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention belongs to the field of new energy automobiles. The invention provides an FFC structure, a production method thereof and a power battery connector. A power battery connector comprises an FFC body and a plurality of conductive connectors connected to connecting wires, wherein the connecting end parts of the connecting wires are connected with the conductive connectors. The invention has the following advantages: the FFC structure keeps the integral rigidity of the FFC and realizes the accurate positioning of the FFC; according to the FFC structure, the FFC body is accurately positioned by arranging the positioning holes, so that the connection end part of the connecting wire is accurately connected with the conductive connector; the PPF and copper sheet or aluminum sheet combination is adopted as a new power battery connector, and the cost of the power battery connector is greatly reduced.
Description
Technical Field
The invention relates to the field of new energy automobile power batteries, in particular to an FFC structure and a battery connector for connecting the power batteries by using the FFC structure.
Background
The battery module of the electric automobile is formed by connecting thousands of battery cores in series through conducting strips, and meanwhile, the positive and negative electrodes of each battery core are required to be connected in a large current manner so as to provide power required by automobile running. And simultaneously, voltage monitoring and temperature monitoring are carried out on each battery cell, and balance control and adjustment are carried out when the electric energy of the battery cells is unbalanced. Another group of thin wires connected to the battery core is provided for realizing monitoring and control functions. Therefore, the electrical connection on the cell comprises a power electrical connection and a control line connection, and the two groups of connecting pieces are simultaneously connected with the cell electrode. How to efficiently and inexpensively make these connections becomes a key technology for the development of batteries for electric vehicles.
In the recently developed composite bus bar technology, an aluminum sheet or a copper sheet is used as power connection, a PCB or an FPC flexible circuit board is used as control line connection, and the parts are compounded into a very light and thin integral connector by using laser welding and hot pressing technologies. The technology makes the assembly of the battery cell very easy and simple, and greatly improves the efficiency of battery assembly. However, the design has some disadvantages, namely higher cost, especially higher cost when adopting FPC; secondly, FPC and PCB are difficult to be made big, and it has the difficulty to make big battery module, does not conform to the battery module development trend of present battery trade bigger and bigger.
The flexible flat cable is an extremely low-cost device, is widely applied to the 3C industry, and can save more than 300 units of cost for each electric vehicle if being applied to the connection of the batteries of the electric vehicles. But the FFC is soft, cannot be accurately positioned and cannot be accurately welded, so that the FFC is difficult to be applied to battery core connection.
As shown in fig. 4, a schematic diagram of a conventional FFC folding structure is shown, an FFC is cut to a required length according to connection requirements, each connecting wire is cut to a specified length according to the length of each electrical connection point, and then the FFC is folded, which is simple in structure, but the FFC is applied to the field of battery module connectors, and the FFC structure cannot meet requirements.
Disclosure of Invention
In order to reduce the cost of the connector for the power battery module and improve the application range of the connector for the power battery module, the invention provides the following technical scheme:
an FFC structure comprises an FFC body, wherein the FFC body comprises a plurality of conductors and an insulating film coated on the surfaces of the conductors, the FFC body can be divided into a plurality of connecting wires according to the number of the conductors, and the connecting wires are folded towards one side of the FFC body. The connection line is folded towards one side of the FFC body, and the folding position of each connection line can be the same or different. Rather than to the entire FFC body.
In a preferred embodiment of the present invention, the connection line is folded toward one side of the FFC body, and one connection line is folded toward one side of the FFC body, or two or more connection lines are folded toward one side of the FFC body.
As another preferable aspect of the present invention, a single connection line cut and separated or an entirety of two or more connection lines not cut and separated is between the folded two or more connection lines.
As another preferable aspect of the present invention, the FFC body is cut according to the position and the length of the connecting line that needs to be folded, so that the portion of the connecting line that needs to be folded can be folded, and the rest of the FFC body is left as it is without cutting.
As still another preferable aspect of the present invention, the connecting line is folded toward one side of the FFC body to form the folded portion, and the folded portion is perpendicular to the FFC body.
In another preferred embodiment of the present invention, the conductor is made of a nickel-plated copper wire, a tin-plated copper wire, or a bare copper.
As another preferable scheme of the present invention, the folded end or the unfolded end of the connection line of the FFC body is a connection end, and a portion electrically connected to the outside is a connection end, and when the connection end is not folded, a window is formed at the position, so that the connection end is not covered by an insulating film and is an exposed conductor.
As another preferable scheme of the present invention, one end of the FFC body is provided with a positioning hole.
A power battery connector comprises the FFC body and a plurality of conductive joints connected to connecting wires, wherein the connecting ends of the connecting wires are connected with the conductive joints.
As a preferable aspect of the present invention, the conductive joint is made of copper, copper alloy, aluminum, or aluminum alloy.
A production method of an FFC structure comprises the following production steps:
s1, according to the size requirement and the folding requirement of an FFC structure, holes are formed in corresponding positions of an insulating film, and the insulating film is made into an insulating film coil material with the holes continuously formed;
s2, pressing the insulating film, the conductor, the insulating film and the three-layer structure into an integral FFC according to the original production mode;
s3, cutting the FFC part needing to be folded, so that the part needing to be folded can be folded, the part needing not to be folded is not required to be cut, and the original shape is reserved;
and S4, folding the part of the FFC to be folded by using a bending machine to obtain the FFC structure.
As a preferable aspect of the present invention, in the step S1, when the number of the connection lines to be folded back of the FFC main body is two or more, the opening of the insulating film is sized to cover the two or more connection lines.
The invention has the following advantages:
1. according to the FFC structure, the connecting wire part needing to be turned over is cut, and the part, which does not need to be turned over, at the rear part of the connecting wire is reserved, so that the whole FFC is ensured to keep the same width, the whole rigidity of the FFC is not influenced, and the FFC is accurately positioned;
2. according to the FFC structure, the window is reserved at the position of the conductor needing to be electrically connected in the FFC, the insulating film is not covered, the part needing to be turned over is cut, and the rest part is reserved, so that the FFC which is not turned over keeps a long-strip-shaped complete structure, a plurality of FFC structures are in a continuous state, and automatic continuous production is realized;
3. according to the FFC structure, the conductive connecting part is not reserved, and the FFC structure can be provided with the positioning hole, so that the integral installation and positioning of the FFC structure are realized;
4. according to the FFC structure, the locating hole is formed in the end, which is not cut but reserved, of the FFC body, so that the FFC body can be accurately located, and the connecting end part of the connecting wire is conveniently and accurately connected with the conductive connector;
5. in the production of the FFC structure, holes are formed in the insulating film in advance, the FFC can be produced by using an original FFC production line, a cutting function is added after the FFC is pressed, the required FFC production can be finished, the automatic continuous production of the FFC is realized, and the produced FFC which is not folded is folded by using a bending machine to obtain the FFC structure;
6. the FFC is used for replacing the existing PCB or FPC, the combination of the PPF and the copper sheet or the aluminum sheet is adopted as a new power battery connector, and the cost of the power battery connector is greatly reduced.
Drawings
FIG. 1 is a schematic view of an FFC;
FIG. 2 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 1;
FIG. 3 is a schematic diagram of a FFC connection line structure;
FIG. 4 is a schematic view of a conventional FFC turnover structure;
FIG. 5 is a schematic view of the FFC structure of the first embodiment of the present invention showing the structure without cutting and folding;
FIG. 6 is a schematic structural view of the FFC structure in an unfolded state according to the first embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a FFC structure according to a first embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a second embodiment of an FFC structure of the present invention;
FIG. 9 is a schematic view of a power cell connector structure of the FFC structure of the first embodiment of the present invention;
fig. 10 is a schematic view of a structure in which the FFC structure of the first embodiment of the present invention is mounted on a battery module.
The reference numbers in the figures are:
1-FFC body 10-connecting line 101-turnover part
102-connecting end portion 11-insulating film 12-conductor
2-conductive joint
Detailed Description
The process embodiments are described in detail below to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the invention.
As shown in fig. 1, fig. 2, fig. 1,base:Sub>A-base:Sub>A sectional view, and fig. 3,base:Sub>A connection line structure diagram of the FFC, the FFC is composed ofbase:Sub>A plurality of conductors 12 and an insulating film 11 covering both sides of the conductors 12, and the FFC may be said to be composed ofbase:Sub>A plurality of connection lines 10. The FFC is a flexible flat cable and is of an integral structure, and can be divided into a plurality of connecting wire 10 structures according to needs. Of course, all or part of the components may be separated.
FIG. 5 is a schematic structural view showing a FFC structure of the present invention in an unfolded state according to a first embodiment; the FFC body 1 comprises a plurality of connecting wires 10, seven connecting wires 10 of the FFC body 1 in the embodiment are arranged from top to bottom, the connecting wires 10-A, the connecting wires 10-B, the connecting wires 10-C, the connecting wires 10-D, the connecting wires 10-E, the connecting wires 10-F and the connecting wires 10-G are arranged from top to bottom, and holes are formed in the connecting wires 10 to be folded according to the positions of the FFC structure to be folded. The left-most side of the FFC body 1 is a conductor 12 not covered with the insulating film 11 for connection to a terminal. In this embodiment, the folded connecting lines 10 are respectively:
a connecting line 10-A,
A connecting line 10-B and a connecting line 10-A,
A connecting line 10-C and a connecting line 10-B,
A connecting line 10-D and a connecting line 10-E,
A connecting line 10-E and a connecting line 10-F,
A connecting line 10-F and a connecting line 10-G,
A connecting line 10-G;
the folded connecting lines can also be combined as follows:
a connecting line 10-A,
A connecting line 10-B and a connecting line 10-A,
A connecting line 10-C and a connecting line 10-B,
A connecting line 10-D and a connecting line 10-C,
A connecting line 10-E and a connecting line 10-F,
A connecting line 10-F and a connecting line 10-G,
A connecting line 10-G;
the folded connecting lines can also be combined as follows:
a connecting line 10-A,
A connecting line 10-B and a connecting line 10-A,
A connecting line 10-C, a connecting line 10-B and a connecting line 10-A,
10-D and 10-C, 10-B and 10-A,
A connecting line 10-E, a connecting line 10-F, a connecting line 10-G,
A connecting line 10-F and a connecting line 10-G,
A connecting line 10-G;
the combination of the two connecting lines 10 in this embodiment is a preferred combination.
The above opening positions of all the insulating films 11 are referred to as windows in the FFC, and the windows hereinafter refer to the opening positions of the insulating films 11 in the FFC.
As shown in fig. 6, the FFC in fig. 5 is cut in the following specific manner, as shown in the schematic structural diagram of the first embodiment of the FFC structure of the present invention in the unfolded state:
the right side of the window of the connecting line 10-A is cut away so that the left side and the right side of the cut position of the window are separated, and the left side and the lower side of the window are cut away so that the connecting line 10-A and the connecting line 10-B are separated by a distance and the lower side and the left side of the window of the connecting line 10-A. The connecting wire 10-A on the right side of the cutting position of the window of the connecting wire 10-A can not be electrically connected with the connecting wire 10-A on the left side any longer, but the connecting wire 10-A on the right side of the cutting position of the window of the connecting wire 10-A is remained in the FFC body 1 and is not cut off, so that the integral rigidity of the FFC body 1 is kept, meanwhile, the window position of the connecting wire 10-A and a distance part to the left can be folded to form a folded part 101, and a distance to the left below the window of the connecting wire 10-A and a specific distance length are determined according to the distance between the position of the FFC body 1 and the electrode of the battery cell in production; in this embodiment, the folded part 101 is folded upwards by 90 °, and the folded part 101 is perpendicular to the FFC body 1;
the right sides of the windows of the connecting line 10-B and the connecting line 10-A are cut and separated, the connecting line 10-A and the connecting line 10-B are kept integrally without cutting and separating, after cutting, the left side and the right side of the cutting position of the windows of the connecting line 10-A and the connecting line 10-B are separated, the cutting position is below the window of the connecting line 10-B and a distance to the left, and the connecting line 10-B and the connecting line 10-C are separated below the window of the connecting line 10-B and a distance to the left. The connecting wire 10-B on the right side of the cut window of the connecting wire 10-B can not be electrically connected with the connecting wire 10-B on the left side any more, but the connecting wire 10-B on the right side of the window of the connecting wire 10-B is remained in the FFC body 1, cutting and cutting are not carried out, the rigidity of the whole FFC body 1 is kept, meanwhile, the whole formed by the position of the window of the connecting wire 10-B, a distance part to the left and a corresponding part of the upper connecting wire 10-A can be turned over to form a turning part 101, and the specific distance length of the distance part to the left below the window of the connecting wire 10-B is determined according to the distance between the position of the FFC body 1 and the electrode of the battery cell in production; in this embodiment, the folded part 101 is folded upwards by 90 °, and the folded part 101 is perpendicular to the FFC body 1;
the right sides of the windows of the connecting line 10-C and the connecting line 10-B are cut and separated, while the connecting line 10-B and the connecting line 10-C are kept integral without cutting and separating, so that the left side and the right side of the cutting position of the window of the connecting line 10-B are separated; cutting the connecting line 10-B and the connecting line 10-C at a distance below the window of the connecting line 10-B and to the left, and separating the connecting line 10-C and the connecting line 10-D at a distance below the window of the connecting line 10-C and to the left; the connecting line 10-B and the connecting line 10-A are cut so that the connecting line 10-B is separated from the connecting line 10-A, and the cutting position corresponds to the cutting position between the connecting line 10-C and the connecting line 10-D. The connecting wire 10-C on the right side of the cut window of the connecting wire 10-C can not be electrically connected with the connecting wire 10-C on the left side any more, but the connecting wire 10-C on the right side of the window of the connecting wire 10-C is remained in the FFC body 1, cutting and cutting are not carried out, the rigidity of the whole FFC body 1 is kept, meanwhile, the whole formed by the position of the window of the connecting wire 10-C, a distance part to the left and a corresponding part of the upper connecting wire 10-B can be turned over to form a turning part 101, and the specific distance length of the distance part to the left below the window of the connecting wire 10-C is determined according to the distance between the position of the FFC body 1 and the electrode of the battery cell in production; in this embodiment, the folded part 101 is folded upwards by 90 °, and the folded part 101 is perpendicular to the FFC body 1;
the right sides of the windows of the connecting line 10-D and the connecting line 10-C are cut and separated, the connecting line 10-D and the connecting line 10-C are kept integral without cutting and separating, and after cutting, the left sides and the right sides of the cutting positions of the windows of the connecting line 10-D and the connecting line 10-C are separated; the connecting line 10-D and the connecting line 10-E are separated from each other below the window of the connecting line 10-D and a distance to the left, the connecting line 10-C and the connecting line 10-B are cut, and the cutting positions vertically correspond to the cutting positions between the connecting line 10-D and the connecting line 10-E, so that the connecting line 10-C and the connecting line 10-B are separated from each other. The connecting wire 10-D on the right side of the cut window of the connecting wire 10-D can not be electrically connected with the connecting wire 10-D on the left side any longer, but the connecting wire 10-D on the right side of the window of the connecting wire 10-D is remained in the FFC body 1, cutting and cutting are not carried out, the rigidity of the whole FFC body 1 is kept, meanwhile, the position of the window of the connecting wire 10-D, a distance part to the left and a corresponding part of the upper connecting wire 10-C can be turned over to form a turning part 101, and the distance, the specific distance and the length of the distance part to the left below the window of the connecting wire 10-D are determined according to the distance between the position of the FFC body 1 and the electrode of the battery cell in production; in this embodiment, the folded part 101 is folded upwards by 90 °, and the folded part 101 is perpendicular to the FFC body 1; in this embodiment, the connecting line 10-D may be combined with the connecting line 10-C, or may be combined with the connecting line 10-E, so that the same effect can be achieved;
the right sides of the windows of the connecting line 10-E and the connecting line 10-F are cut and separated, the connecting line 10-E and the connecting line 10-F are kept integral without cutting and separating, and after cutting, the left sides and the right sides of the cutting positions of the windows of the connecting line 10-E and the connecting line 10-F are separated; cutting the connecting line 10-E above the window of the connecting line 10-E and a distance to the left to separate the connecting line 10-E from the connecting line 10-D above the window of the connecting line 10-E and a distance to the left; the connecting line 10-F and the connecting line 10-G are cut at a distance below the window of the connecting line 10-F and to the left, so that the connecting line 10-F is separated from the connecting line 10-G. The position of the lower part of the connecting line F is corresponding to the position of the upper part of the connecting line E. The connecting wire 10-E cut at the right side of the window of the connecting wire 10-E can not be electrically connected with the connecting wire 10-E cut at the left side any more, but the connecting wire 10-E cut at the right side of the window of the connecting wire 10-E is remained in the FFC body 1, cutting and cutting are not carried out, the rigidity of the whole FFC body 1 is kept, meanwhile, the whole formed by the window position of the connecting wire 10-E, a distance part to the left and a corresponding part of the upper connecting wire 10-D can be turned over to form a turning part 101, the distance to the left above the window position of the connecting wire 10-E, and the specific distance length is determined according to the distance between the position of the FFC body 1 and the electrode of the battery cell in production; in this embodiment, the folded part 101 is folded upwards by 90 °, and the folded part 101 is perpendicular to the FFC body 1;
the right sides of the windows of the connecting line 10-F and the connecting line 10-G are cut and separated, the connecting line 10-F and the connecting line 10-G are kept integrally, so that the left side and the right side of the part, corresponding to the window of the connecting line 10-G, of the connecting line 10-F are separated, the window of the connecting line 10-F is cut and separated at a distance above and to the left, and the connecting line 10-E and the connecting line 10-F are separated at a distance above and to the left of the window of the connecting line 10-F; the connecting wire 10-F on the right side of the cutting position of the window of the connecting wire 10-F can not be electrically connected with the connecting wire 10-F on the left side any longer, but the connecting wire 10-F on the right side of the window of the connecting wire 10-F is remained in the FFC body 1 and is not cut off, so that the rigidity of the whole FFC body 1 is kept, meanwhile, the whole formed by the window position of the connecting wire 10-F, a distance part to the left and a corresponding part of the lower connecting wire 10-G can be turned over to form a turning part 101, and the distance, the specific distance length, below the window of the connecting wire 10-B, to the left is determined according to the distance between the position of the FFC body 1 and the electrode of the battery cell in production; in this embodiment, the folded part 101 is folded upwards by 90 °, and the folded part 101 is perpendicular to the FFC body 1;
the right side of the window of the connecting line 10-G is cut away so that the left side and the right side of the cutting position of the window are separated, and the upper side and the left side of the window are cut away so that the connecting line 10-G and the connecting line 10-F are separated above the window of the connecting line 10-G and at a distance to the left. The connecting wire 10-G on the right side of the cutting position of the window of the connecting wire 10-G can not be electrically connected with the connecting wire 10-G on the left side any more, but the connecting wire 10-G on the right side of the cutting position of the window of the connecting wire 10-G is remained in the FFC body 1 and is not cut and cut, so that the integral rigidity of the FFC body 1 is kept, meanwhile, the window position of the connecting wire 10-G and a distance part to the left can be turned over to form a turning part 101, and the distance, specifically the distance length, from the lower part to the upper part to the left part of the window of the connecting wire 10-G is determined according to the distance between the position of the FFC body 1 and the electrode of the battery cell in production; in this embodiment, the folded part 101 is folded upwards by 90 °, and the folded part 101 is perpendicular to the FFC body 1;
fig. 6 is a schematic structural view showing the FFC structure of the first embodiment of the present invention in an unfolded state, after being folded, as shown in fig. 7,
the connecting line 10-A is turned upwards to form a turning part 101,
the connecting line 10-A and the connecting line 10-B are integrally turned upwards to form a turning part 101,
the connecting line 10-B and the connecting line 10-C are integrally folded upwards to form a folded part 101,
the connecting line 10-C and the connecting line 10-D are integrally turned upwards to form a turning part 101,
the connecting line 10-E and the connecting line 10-F are integrally folded downwards to form a folded part 101,
the connecting line 10-F and the connecting line 10-G are integrally folded downwards to form a folded part 101,
the connecting line 10-G is turned over downward to form a turned-over part 101,
the end of the folded part 101 away from the FFC body 1 is a connection end 102, and the connection end 102 is a bare conductor 12.
The upper, lower, left and right sides described in the first embodiment are only described with reference to the embodiment of the present invention, and are not intended to limit the technical scope of the embodiment. In the specific example, whether the product is cut and separated from the left side or the right side, and whether the product is turned upwards or downwards can be determined according to the position and the direction of the product, so that the same technical effect can be achieved.
In this embodiment, the connection line 10-B and the connection line 10-C may be an integral structure or may be separate single connection lines 10-B and 10-C, and similarly, the connection line 10-C and the connection line 10-D, the connection line 10-D and the connection line 10-E, the connection line 10-E and the connection line 10-F, and the connection line 10-F and the connection line 10-G may be integral or separate single connection lines, but the integral structure of the two is the most preferred embodiment.
The connection lines 10 may be combined in various ways, for example, the present embodiment may be grouped as follows:
a connecting line 10-A;
the connecting line 10-B and the connecting line 10-A are integrated;
the connecting line 10-C, the connecting line 10-B and the connecting line 10-A are integrated;
the connecting line 10-D, the connecting line 10-C, the connecting line 10-B and the connecting line 10-A are integrated;
the connecting line 10-E, the connecting line 10-F and the connecting line 10-G are integrated;
the connecting line 10-F and the connecting line 10-G are integrated;
a connecting line 10-G;
can also be grouped as follows:
a connecting line 10-A;
the connecting line 10-B and the connecting line 10-A are integrated;
the connecting line 10-C, the connecting line 10-B and the connecting line 10-A are integrated;
the connecting line 10-D, the connecting line 10-E, the connecting line 10-F and the connecting line 10-G are integrated;
the connecting line 10-E, the connecting line 10-F and the connecting line 10-G are integrated;
the connecting line 10-F and the connecting line 10-G are integrated;
a connecting line 10-G;
the above embodiments only illustrate some of the combination methods, but are not intended to limit the present invention, and in the specific implementation, the optimum combination method is selected according to the number of the connection lines 10 of the FFC main body 1, the processing technique, and other factors.
In the first embodiment, the folded portion 101 may be folded at another angle, and may be connected to the conductive contact 2.
Fig. 8 is a schematic structural diagram of a second embodiment of an FFC structure of the present invention, which is the same as the first embodiment, and the difference is that in the folding structure of the second embodiment, the folding portion 101 is a single connection line 10, specifically, in this embodiment, the folding portion 101 respectively folds the connection line 10-a, the connection line 10-B, the connection line 10-C, the connection line 10-D, the connection line 10-E, the connection line 10-F, and the connection line 10-G.
Referring to fig. 9 and fig. 9, a schematic diagram of a power battery connector with the FFC structure according to the first embodiment of the present invention is shown, in which the folded portion 101 of the FFC body 1 is connected to the conductive contact 2 to form the power battery connector of the present invention, which is a flat connector as a whole, and meanwhile, the FFC structure can be very long, up to 2 meters and 3 meters, which can maintain the rigidity of the FFC structure, and ensure the precise positioning of the connection between the FFC structure and the conductive contact 2. In this embodiment, the conductive connector 2 is made of aluminum. And the conductive connector 2 is connected with the electrode of the battery module to realize the function of a power battery connector.
As shown in fig. 10, the schematic diagram of the FFC structure according to the first embodiment of the present invention is mounted on a battery module, the conductive tab 2 of the power battery connector according to the present invention is connected to an electrode of the battery module, the conductive tab 2 implements a power connection function of the battery module, and the FFC body 1 implements monitoring and controlling of the power battery. The end part of the FFC body 1 can be provided with a positioning hole, the end part FFC body 1 does not have a conductive function any more, the positioning hole can be cut, and the mounting and positioning accuracy of the power battery connector is further improved. The positioning hole is not embodied in this embodiment.
A production method of an FFC structure is the same as that of the first embodiment, and comprises the following production steps:
s1, according to the size requirement and the folding requirement of the FFC structure, holes are formed in corresponding positions of the insulating film, the insulating film roll material with the holes continuously formed is manufactured, and the specific hole forming requirement is as follows:
the connecting line 10-A is covered by the open pore range;
the connecting line 10-B and the connecting line 10-A are combined, and the connecting line 10-B and the connecting line 10-A are covered in the open hole range;
the connecting line 10-C and the connecting line 10-B are combined, and the opening range covers the connecting line 10-C and the connecting line 10-B;
the connecting line 10-D and the connecting line 10-E are combined, and the opening range covers the connecting line 10-D and the connecting line 10-E;
the connecting line 10-E and the connecting line 10-F are combined, and the opening range covers the connecting line 10-E and the connecting line 10-F
The connecting line 10-F and the connecting line 10-G are combined, and the opening range covers the combination of the connecting line 10-F and the connecting line 10-G;
the connecting line 10-G is covered by the opening range;
s2, pressing the insulating film, the conductor, the insulating film and the three-layer structure into an integral FFC according to the original production mode, wherein the effect after pressing is shown as the attached drawing 5;
s3, cutting the FFC part needing to be folded, so that the part needing to be folded can be folded, the part needing not to be folded is not required to be cut, the original shape is reserved, and the cut effect is as shown in the attached figure 6;
and S4, folding the part of the FFC to be folded by using a bending machine, wherein the effect after folding is shown as the attached figure 7, and obtaining the FFC structure.
The production method of the FFC structure can continue to use the original FFC production equipment, only needs to add a cutting function, or performs subsequent cutting, can realize automatic production, is limited in cost increase, and does not improve the production complexity and the production cost while improving the application range of the FFC.
The above description is only one of the embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive skill in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (11)
1. An FFC structure comprises an FFC body (1), wherein the FFC body (1) comprises a plurality of conductors (12) and insulating films (11) covering the surfaces of the conductors (12), the FFC body (1) can be divided into a plurality of connecting wires (10) according to the number of the conductors (12), the connecting wires (10) are folded towards one side of the FFC body (1), the FFC body (1) is cut according to the positions and lengths of the connecting wires (10) which need to be folded, so that the parts of the connecting wires (10) which need to be folded can be folded, and the rest parts of the FFC body (1) are left as they are and are not cut.
2. The FFC structure of claim 1, wherein: the connecting wire (10) is folded towards one side of the FFC body (1), one connecting wire (10) is folded towards one side of the FFC body (1), or more than two connecting wires (10) are folded towards one side of the FFC body (1).
3. The FFC structure of claim 2, wherein: the folded more than two connecting lines (10) are integrated by a single connecting line (10) which is cut and separated or more than two connecting lines (10) which are not cut and separated.
4. The FFC structure of claim 1, wherein: the connecting wire (10) is turned towards one side of the FFC body (1) to form the turning-folding part (101), and the turning-folding part (101) is perpendicular to the FFC body (1).
5. The FFC structure of claim 1, wherein: the conductor (12) is made of nickel-plated copper wires, tin-plated copper wires or bare copper.
6. The FFC structure of claim 2, wherein: the FFC comprises an FFC body (1), wherein the connection end (10) of the FFC body is a folded end or a non-folded end, the part which is in conductive connection with the outside is a connection end (102), and when the connection end (102) is not folded, a window is arranged at the position, so that the connection end (102) is not covered by an insulating film (11) and is an exposed conductor (12).
7. The FFC structure of claim 2, wherein: one end of the FFC body (1) is provided with a positioning hole.
8. A power battery connector, characterized in that: the power cell connector comprises the FFC body (1) of claim 1 and a plurality of electrically conductive contacts (2) connected to the connection wires (10), the connection ends (102) of the connection wires (10) being connected to the electrically conductive contacts (2).
9. The power cell connector of claim 8, wherein: the conductive joint (2) is made of copper, copper alloy, aluminum or aluminum alloy.
10. A method of producing the FFC structure of claim 1, wherein: the production method comprises the following steps:
s1, according to the size requirement and the folding requirement of the FFC structure, holes are formed in corresponding positions of an insulating film (11) to manufacture a continuous-hole insulating film (11) coil stock;
s2, pressing the insulating film (11), the conductor (12), the insulating film (11) and the three-layer structure into an integral FFC according to the original production mode;
s3, cutting the FFC part needing to be folded, so that the part needing to be folded can be folded, the part needing not to be folded is not required to be cut, and the original shape is reserved;
and S4, folding the part of the FFC to be folded by using a bending machine to obtain the FFC structure in claim 1.
11. The method of producing an FFC structure according to claim 10, wherein: in the step S1, when the number of the connecting wires (10) to be folded of the FFC body (1) is two or more, the openings of the insulating film (11) cover the two or more connecting wires (10).
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| CN202110281148.7A CN113068297B (en) | 2021-03-16 | 2021-03-16 | FFC structure, production method thereof and power battery connector |
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| CN202110281148.7A CN113068297B (en) | 2021-03-16 | 2021-03-16 | FFC structure, production method thereof and power battery connector |
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| CN113068297B true CN113068297B (en) | 2022-12-27 |
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| CN112310687A (en) * | 2020-04-20 | 2021-02-02 | 深圳闻信电子有限公司 | Vehicle FFC and processing method thereof |
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