Novel structure for signal acquisition circuit in power battery

Abstract

The utility model discloses a novel structure for a signal acquisition circuit in a power battery, which comprises a flexible base material and further comprises an FPC / FDC acquisition circuit which is arranged on the flexible base material and is close to the front end of a CCS integrated busbar, and the end part of the FPC / FDC acquisition circuit is provided with a connector; the FCC acquisition circuit is arranged on the flexible base material and is close to the rear end of the CCS integrated busbar; the FPC / FDC acquisition circuit is electrically connected with the FCC acquisition circuit, the insulation component is arranged between the FPC / FDC acquisition circuit and the FCC acquisition circuit and is used for supporting and fixing the FCC acquisition circuit and the FPC / FDC acquisition circuit, a bonding pad of the FPC / FDC acquisition circuit and a bonding pad of the FCC acquisition circuit are respectively fixed on the same insulation component, and the FCC acquisition circuit is electrically connected with the FPC / FDC acquisition circuit. The novel structure for the signal acquisition circuit in the power battery provided by the utility model is simple in structure and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of battery busbar, especially relates to a novel structure for signal acquisition circuit in power battery. BACKGROUND

[0002] In the traditional power battery integrated busbar, as shown in the drawings, the FPC acquisition circuit structure that has been mass-produced at present generally comprises a flexible substrate, an FPC acquisition circuit arranged on the flexible substrate and busbars arranged on both sides of the FPC acquisition circuit, in order to reduce cost and increase efficiency and iterate and upgrade, the following alternative solutions are usually adopted: Figure 1 (1) using an FDC signal acquisition circuit to replace the existing FPC signal acquisition circuit;

[0003] (2) using an FCC signal acquisition circuit to replace the existing FPC signal acquisition circuit.

[0004] The above-mentioned alternative solutions have the following defects:

[0005] (1) the length of the mature and stable FDC acquisition circuit is limited, the longer the FDC acquisition circuit is, the more knife dies are needed in the processing process, so that the precision of the conductor circuit rolled and cut is lower, the probability of defects occurring in the rolling and cutting process is higher, and the yield of the FDC acquisition circuit product is lower, which affects the quality of the long FDC acquisition circuit product and increases the manufacturing cost;

[0006] (2) the existing FPC acquisition circuit head connector needs to be replaced by an FCC acquisition circuit end special connector or a PCB adapter plate is added between the FCC acquisition circuit and the connector; if the FCC acquisition circuit end special connector is used, the connector matched with the module externally also needs to be replaced, and many accessories involved in the change are needed, which increases the change workload; if a PCB adapter plate is added between the FCC acquisition circuit and the connector, the structure of the connector area in the module may also need to be optimized, and the change of other components is involved, which also increases the change workload.

[0007] TECHNICAL FIELD The utility model aims at providing a novel structure for signal acquisition circuit in power battery, which is simple in structure and low in cost.

[0008] The utility model aims at providing a novel structure for signal acquisition circuit in power battery, which is simple in structure and low in cost.

[0009] Based on the above problems, the technical scheme provided by the utility model is:

[0010] The novel structure for signal acquisition circuit in power battery comprises a flexible substrate and further comprises:

[0011] An FPC / FDC collection line is arranged on the flexible substrate, and an end of the FPC / FDC collection line is provided with a connector;

[0012] An FCC collection line is arranged on the flexible substrate away from the end of the connector;

[0013] An insulating component is arranged between the FPC / FDC collection line and the FCC collection line, and is used for supporting and fixing the FCC collection line and the FPC / FDC collection line, the welding points of the FPC / FDC collection line and the welding points of the FCC collection line are fixed on the same insulating component respectively, and the FCC collection line and the FPC / FDC collection line are electrically connected.

[0014] In some embodiments, the FCC collection line and the FPC / FDC collection line are connected through a plurality of bonding wires.

[0015] In some embodiments, the welding areas of the FCC collection line and the FPC / FDC collection line are provided with insulating protective glue.

[0016] In some embodiments, the insulating component is an insulating support plate, the welding points of the FPC / FDC collection line are fixed on a first side of the insulating support plate, and the welding points of the FCC collection line are fixed on a second side of the insulating support plate which is arranged opposite to the first side.

[0017] In some embodiments, a bus bar is further arranged on both sides of the FPC / FDC collection line and the FCC collection line which are connected to each other, and the FPC / FDC collection line and the FCC collection line are electrically connected with the bus bars on both sides.

[0018] In the above technical solution:

[0019] The FPC (Flexible Printed Circuit) is a flexible circuit board with high wiring density, light weight, and thin thickness, and is mainly used for collecting and transmitting the voltage and temperature signals of the PACK, and is composed of a copper foil substrate (which constitutes the main circuit and etching Fuse), a PI film, AD glue, a reinforcing plate, a nickel sheet, a connector, solder paste, NTC, glue, etc.

[0020] FDC (Flexible Die-cutting Circuit) is a kind of flexible circuit board made of polyimide or polyester film as the base material through die-cutting process, mainly used for PACK cell voltage and temperature signal acquisition and transmission, which is composed of copper foil base material (constituting main circuit and die-cutting Fuse), PI film, AD glue, reinforcing plate, nickel sheet, connector, solder paste, NTC, glue and the like;

[0021] FFC (Flexible Flat Cable) is a kind of flexible flat cable composed of flat conductor, insulation bearing material and auxiliary parts, which is formed by pressing process, has the advantages of softness, small size, simple connection and the like, and is mainly used for acquisition and transmission of power battery module signals in the whole life cycle, which is composed of conductor, adhesive film, connector, glue, double-sided adhesive, reinforcing material and the like.

[0022] FCC (FFC Connect FDC) is a kind of flexible flat cable composed of flat conductor and insulation bearing material and auxiliary parts, which is formed by pressing process, has the advantages of softness, small size, simple connection and the like, and is mainly used for acquisition and transmission of power battery module signals in the whole life cycle, which is composed of conductor, adhesive film, connector, glue, double-sided adhesive, sampling terminal and the like.

[0023] Compared with the prior art, the utility model has the advantages of:

[0024] 1. The length of the FDC acquisition circuit is shortened, the number of hobbing tools is reduced, and the yield of the FDC acquisition circuit is improved.

[0025] 2. The FPC / FDC acquisition circuit (including connector) structure of the CCS integrated busbar front end is retained, the connector does not need to be replaced, and the workload of replacing peripheral accessories is reduced.

[0026] 3. The welding points of the FPC / FDC acquisition circuit and the welding points of the FCC acquisition circuit are fixed on the same insulating support plate, the welding areas on the insulating support plate resonate at the same frequency, and the connection failure of the wire drawing welding area caused by vibration is effectively prevented.

[0027] 4. The wire drawing welding area has no tin material stacking, welding slag, welding deviation and the like, has an attractive appearance, stable performance, high yield, and the wire drawing welding area can be detected, and the connection failure is effectively prevented.

[0028] 5. Compared with the single FPC / FDC acquisition circuit, the product cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows, and the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the premise of the drawings.

[0030] Figure 1 It is a structural schematic diagram of the FPC collection circuit structure in the prior art.

[0031] Figure 2 It is a structural schematic diagram of the novel structure embodiment of the signal collection circuit in the power battery of the present application.

[0032] Figure 3 It is Figure 2 It is a local enlarged view of A in the middle.

[0033] Among them:

[0034] 100, flexible substrate; 200, FPC collection circuit; 300, bus bar;

[0035] 1, flexible substrate;

[0036] 2, FPC / FDC collection circuit; 2-1, connector;

[0037] 3, FCC collection circuit;

[0038] 4, insulating support plate;

[0039] 5, welding wire;

[0040] 6, bus bar. DETAILED DESCRIPTION

[0041] The above scheme will be further described in combination with specific embodiments. It should be understood that these embodiments are used to illustrate the present application and do not limit the scope of the present application. The implementation conditions used in the embodiments can be further adjusted according to the specific conditions of the manufacturer, and the implementation conditions not mentioned are usually the conditions in the conventional experiment.

[0042] As Figure 2 and Figure 3 It is a structural schematic diagram of the embodiment of the present application, and provides a novel structure for the signal collection circuit in the power battery, which comprises a flexible substrate 1, an FPC / FDC collection circuit 2, an FCC collection circuit 3 and an insulating part.

[0043] The flexible substrate 1 adopts PET film or PI film, which is used as the carrier of the signal collection circuit and the bus bar.

[0044] FPC / FDC collection line 2 is arranged on the flexible substrate 1, and a connector 2-1 is arranged at the end of the FPC / FDC collection line 2.

[0045] The FCC collection line 3 is arranged on the flexible substrate 1 away from the connector, and the FCC collection line 3 is electrically connected with the FPC / FDC collection line 2, so that the original FPC collection line is divided into two segments, the length of the FDC collection line is shortened, the yield of the FDC collection line is improved, and the FCC collection line does not need to be provided with an additional special connector, thereby reducing the workload of replacing accessories.

[0046] The insulating component is arranged between the FPC / FDC collection line 2 and the FCC collection line 3, and is used for supporting the FCC collection line 3 and the FPC / FDC collection line 2, and the welding points of the FPC / FDC collection line 2 and the welding points of the FCC collection line 3 are fixed on the same insulating component. Preferably, the insulating component is an insulating support plate 4, the welding points of the FPC / FDC collection line 2 are fixed on a first side of the insulating support plate 4, and the welding points of the FCC collection line 3 are fixed on a second side of the insulating support plate 4 which is arranged opposite to the first side.

[0047] In the example, the FCC collection line 3 and the FPC / FDC collection line are connected through wire bonding, a plurality of bonding wires 5 are formed on the welding area of the insulating support plate 4, the FCC collection line 3 and the FPC / FDC collection line 2 are connected through the plurality of bonding wires 5, and then insulating protective glue is applied on the welding area to realize the electrical connection of the two.

[0048] The signal collection line described above further comprises busbars 6 arranged on both sides of the FPC / FDC collection line 2 and the FCC collection line 3 which are connected with each other, and the FPC / FDC collection line 2 and the FCC collection line 3 are electrically connected with the busbars 6 on both sides.

[0049] In summary, the signal collection structure can shorten the length of the FDC collection line, improve the yield of the FDC collection line, does not need to replace the connector, reduces the workload of replacing accessories, and has a simple manufacturing process.

[0050] The above examples are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and it cannot limit the protection scope of the utility model. Any equivalent transformation or modification according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A novel structure for signal acquisition circuits in power batteries, comprising a flexible substrate, characterized in that, Also includes: The FPC / FDC acquisition line is disposed on the flexible substrate, and the end of the FPC / FDC acquisition line is provided with a connector; The FCC acquisition line is disposed on the flexible substrate at one end away from the connector; An insulating component is disposed between the FPC / FDC acquisition line and the FCC acquisition line to support and fix the FCC acquisition line and the FPC / FDC acquisition line. The solder joints of the FPC / FDC acquisition line and the FCC acquisition line are respectively fixed on the same insulating component. The FCC acquisition line and the FPC / FDC acquisition line are electrically connected.

2. The novel structure for signal acquisition circuits in power batteries according to claim 1, characterized in that: The FCC acquisition line is connected to the FPC / FDC acquisition line via multiple bonding wires.

3. The novel structure for signal acquisition circuits in power batteries according to claim 2, characterized in that: The welding area between the FCC acquisition line and the FPC / FDC acquisition line is provided with insulating protective adhesive.

4. The novel structure for signal acquisition circuits in power batteries according to claim 1, characterized in that: The insulating component is an insulating support plate. The welding point of the FPC / FDC acquisition line is fixed to the first side of the insulating support plate, and the welding point of the FCC acquisition line is fixed to the second side of the insulating support plate opposite to the first side.

5. The novel structure for signal acquisition circuits in power batteries according to claim 1, characterized in that: It also includes busbars, which are installed on both sides of the interconnected FPC / FDC acquisition lines and FCC acquisition lines, and the FPC / FDC acquisition lines and FCC acquisition lines are electrically connected to the busbars on both sides.

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