CN218386061U

CN218386061U - Flat circuit body and battery monomer voltage acquisition loop with safety mechanism

Info

Publication number: CN218386061U
Application number: CN202222757656.0U
Authority: CN
Inventors: 王超
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-01-24
Anticipated expiration: 2032-10-19

Abstract

The utility model relates to a flat circuit body and battery cell voltage acquisition return circuit with insurance mechanism, wherein, the flat circuit body with insurance mechanism includes the flat circuit body, electrically conducts mechanism and insurance mechanism. The flat circuit body includes at least one conductor and an insulator wrapping the conductor, the conductor having a breaking portion. The conductive mechanism is electrically connected with the safety mechanism and the conductors on the two sides of the disconnecting part. The utility model discloses enable the return circuit of flat circuit body and effectively protected, improved the safety that the flat circuit body used on whole car.

Description

Flat circuit body and battery monomer voltage acquisition loop with insurance mechanism

Technical Field

The utility model relates to an automotive electronics electric field especially relates to a flat circuit body and battery cell voltage acquisition return circuit with insurance mechanism.

Background

A wiring member having flexibility such as an FPC (flexible printed circuit) and an FFC (flexible flat cable) may be referred to as a flat circuit body. Due to the characteristics of the FPC/FFC in terms of space and weight, the FPC/FFC has great advantages compared with small loads and signal loads, and therefore the application amount of the FPC/FFC in a vehicle-mounted electrical appliance connecting system is increasing. However, the FPC/FFC also has many inconvenient characteristics in use, for example, when loop protection is set, since the FFC/FPC cannot be connected to a conventional fuse box, the FFC/FPC loop cannot be fuse protected, and the FFC/FPC loop cannot be protected under the condition of overload or short circuit of the loop, thereby greatly limiting the use of the FFC/FPC in a vehicle-mounted environment.

Therefore, the inventor provides a flat circuit body with a safety mechanism and a battery cell voltage acquisition loop by experience and practice of related industries for many years, so as to overcome the defects of the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flat circuit body and battery monomer voltage acquisition return circuit with insurance mechanism enables the return circuit of the flat circuit body and effectively protects, has improved the safety that the flat circuit body used on whole car.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a flat circuit body with a safety mechanism, which comprises a flat circuit body, a conductive mechanism and a safety mechanism; the flat circuit body comprises at least one conductor and an insulator wrapping the conductor, wherein the conductor is provided with a breaking part; the conductive mechanism is electrically connected with the safety mechanism and the conductors on the two sides of the disconnecting part.

In a preferred embodiment of the present invention, the conductive mechanism includes at least two conductive units, the inner ends of the conductive units are electrically connected to the corresponding ends of the safety mechanism, and the outer ends are electrically connected to the corresponding conductors in the two sides of the disconnection portion.

In a preferred embodiment of the present invention, the flat circuit body with the safety mechanism further includes an insulating housing, the safety mechanism is disposed in the insulating housing, the insulating housing is disposed near the disconnection portion, and the inner end of the conductive unit can pass through the insulating housing and connect with the corresponding end of the safety mechanism.

In a preferred embodiment of the present invention, a metal fastener is disposed through the insulating housing for fixing the inner end of the conductive unit to the end of the safety mechanism; or the inner side end of the conductive unit is welded and fixed with the end part of the safety mechanism.

In a preferred embodiment of the present invention, the insulating housing is a transparent housing.

In a preferred embodiment of the present invention, the outer end of the conductive unit is electrically connected to the corresponding conductor by piercing the crimp.

In a preferred embodiment of the present invention, each conductive unit includes a bottom plate and a plurality of crimping teeth disposed at edges of two sides of the bottom plate, and an end of the bottom plate can pass through the insulating housing and is connected to an end of the safety mechanism; each crimp tooth is capable of being pierced by the insulator on both sides of the corresponding conductor and the insulator outside the surface on one side of the conductor and crimped onto the surface of the conductor.

In a preferred embodiment of the present invention, the pressing teeth on both sides of the bottom plate are arranged in a staggered manner along the length direction of the bottom plate.

In a preferred embodiment of the present invention, an insulating tape is bonded to at least one side surface of the flat circuit body at a position corresponding to the conductive mechanism.

In a preferred embodiment of the present invention, the flat circuit body is an FPC or an FFC.

The utility model also provides a battery monomer voltage acquisition loop, which comprises an acquisition board, a battery monomer and the flat circuit body with the safety mechanism; the battery monomer is including a plurality of battery cells of series connection in proper order, gathers the board and passes through the connector and be connected with the first end of flat circuit body, and the tip of each conductor all is connected with corresponding battery cell's electrode in the second end of flat circuit body.

In a preferred embodiment of the present invention, the battery cells include a plurality of pairs of battery packs connected in series, each pair of battery packs includes two battery cells connected in series, and the end of each conductor in the flat circuit body is connected to the electrode of one of the battery cells in the corresponding battery pack.

From the above, in the flat circuit body with the safety mechanism of the present invention, the conductor is disconnected by one section to form a disconnection portion, and the conductive mechanism is utilized to connect the conductors on both sides of the disconnection portion and connect both ends of the safety mechanism, so that the conductor part on one side of the disconnection portion forms a loop with the conductor part on the other side of the disconnection portion after passing through the safety mechanism, and the corresponding loop in the flat circuit body has the function of a fuse, and is convenient to use, safe and reliable; the loop protection is provided for the loops in the FFC and the FPC, so that a plurality of original scenes without the FFC or FPC loop protection are changed from an unprotected state to a loop protected state, the loop safety is greatly improved when the FFC and the FPC are used in an electric framework of an automobile, the use scenes of the FFC and the FPC are enlarged, and the space cost and the weight cost of the whole automobile are saved.

The utility model provides a battery monomer voltage acquisition return circuit, the flat circuit body that will have safety mechanism is used in the free voltage acquisition of battery for the free voltage acquisition return circuit of battery has had the function of fuse, has realized the safety protection in voltage acquisition return circuit, and has practiced thrift whole car space cost and weight cost.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

FIG. 1: does the utility model provides a structure chart after electrically conductive mechanism is connected with the fuse box.

FIG. 2: is a top view of fig. 1.

FIG. 3: for the utility model provides a structure picture behind electrically conductive mechanism and fuse box and the flat circuit body coupling.

FIG. 4 is a schematic view of: is a top view of fig. 3.

FIG. 5: is a cross-sectional view at the conductive unit in fig. 3.

FIG. 6: do the utility model provides a battery monomer voltage acquisition circuit's schematic diagram.

The reference numbers illustrate:

1. a flat circuit body; 11. a conductor; 111. a breaking part; 12. an insulator; 121. a first insulating layer; 122. a second insulating layer;

2. a fuse box; 21. an insulating case; 22. a safety mechanism; 23. a metal fastener;

3. a conductive unit; 31. a base plate; 32. crimping teeth;

4. an insulating tape;

5. collecting a plate;

6. a connector;

7. a battery pack; 71. a battery cell.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 6, the present application provides a flat circuit body with a fuse mechanism, including a flat circuit body 1, a conductive mechanism, and a fuse mechanism 22. The flat circuit body 1 includes at least one conductor 11 and an insulator 12 wrapping the conductor 11, the conductor 11 having a cut-off portion 111; the conductive means is electrically connected to the safety means 22 and the conductor 11 on both sides of the cut-out portion 111.

It is understood that the flat circuit body 1 may be an FPC or an FFC, and is formed of an insulator 12 formed of two insulating layers and one or more flat conductors 11 press-fitted between the two insulating layers, and has a flat belt shape as a whole, each conductor 11 is in a belt shape extending straight by a predetermined width, and the plurality of conductors 11 are arranged in parallel at intervals.

In the flat circuit body with the safety mechanism, the conductor 11 is disconnected by a section to form a disconnected part 111 (namely, a part without a conductor), and the conductor 11 on two sides of the disconnected part 111 is connected by the conductive mechanism and is connected with two ends of the safety mechanism 22, so that the conductor 11 on one side of the disconnected part 111 passes through the safety mechanism 22 and then forms a loop with the conductor 11 on the other side of the disconnected part 111, and a corresponding loop in the flat circuit body 1 has the function of a fuse, and is convenient to use, safe and reliable; the circuit protection is provided for the circuits in the FFC and the FPC, so that the original scenes without the FFC or FPC circuit protection are changed from an unprotected state to a circuit protected state, the safety of the circuits in the use of the FFC and the FPC in an automobile electrical framework is qualitatively overflowed, the use scenes of the FFC and the FPC are enlarged, and the space cost and the weight cost of the whole automobile are saved.

In a specific implementation manner, the conductive mechanism includes at least two conductive units 3, and the inner ends of the conductive units 3 are electrically connected to the corresponding ends of the safety mechanism 22, and the outer ends are electrically connected to the corresponding conductors 11 in two sides of the disconnecting portion 111. For example, in the present embodiment, the conductive mechanism includes two conductive units 3, inner ends of the two conductive units 3 are electrically connected to two ends of the safety mechanism 22, respectively, and outer ends of the two conductive units 3 are electrically connected to the conductors 11 on two sides of the cut-off portion 111, respectively.

Further, the flat circuit body with the safety mechanism further includes an insulating case 21, the safety mechanism 22 is provided inside the insulating case 21, the insulating case 21 is provided near the breaking portion 111, and the inside end of the conductive unit 3 can pass through the insulating case 21 and be connected with the corresponding end of the safety mechanism 22. The insulating housing 21 and the fuse 22 form a fuse box 2, and two conductive units 3 in the common conductive mechanism are symmetrically arranged at two ends of the fuse box 2.

In order to facilitate the connection and fixation of the conductive unit 3 and the safety mechanism 22 and ensure that the conductive unit 3 and the safety mechanism 22 form a loop, for example, a metal fastener 23 may be provided on the insulating casing 21 for fixing the inner end of the conductive unit 3 and the end of the safety mechanism 22; the metal fastener 23 may be a rivet, for example, and the conductive unit 3 and the safety mechanism 22 form a loop through the metal fastener 23. For another example, the inner end of the conductive unit 3 may be welded and fixed to the end of the safety mechanism 22. Of course, other fixing manners may be adopted, and this embodiment is only for illustration.

The insulating case 21 may be a transparent case, for example, to facilitate observation of the fusing state of the fuse 22.

The number of the conductive mechanisms should be the same as the number of the fuse mechanisms 22, and preferably, the number of the fuse mechanisms 22 is the same as the number of the conductors 11, so that each circuit of the flat circuit body 1 has a fuse function, and is safer and more reliable.

Further, to facilitate the installation connection, the outer ends of the conductive units 3 are electrically connected to the respective conductors 11 by piercing crimping.

Specifically, referring to fig. 3 and 5, each of the conductive units 3 includes a bottom plate 31 and a plurality of crimping teeth 32 provided at both side edges of the bottom plate 31, and an end of the bottom plate 31 can pass through the insulating case 21 and be connected with an end of the safety mechanism 22. Each crimp tooth 32 can be pierced by the insulator 12 on both sides of the corresponding conductor 11 and the insulator 12 outside the surface on one side of the conductor 11, and crimped onto the surface of the conductor 11.

Generally, the number of the crimp teeth 32 on both sides of the base plate 31 may be the same or different, and the crimp teeth 32 on both sides of the base plate 31 are preferably arranged in a staggered manner along the length direction of the base plate 31.

Corresponding through holes are formed in the positions, needing to be pierced, of the insulator 12, and the two insulating layers outside the surfaces of the two sides of the conductor 11 are respectively marked as a first insulating layer 121 and a second insulating layer 122; the base plate 31 is arranged against the first insulating layer 121, the crimp teeth 32 on both sides of the base plate 31 can be pierced by corresponding perforations in the insulating body 12 on both sides of the respective conductor 11, and the crimp teeth 32 are then bent to be pierced by corresponding perforations in the second insulating layer 122 and brought into surface contact with the inner conductor 11.

Further, an insulating tape 4 is adhered to at least one side surface of the flat circuit body 1 at a position corresponding to the conductive mechanism. Since the conductors 11 are exposed at the location of the piercing-crimping, it is necessary to adhere the insulating tape 4 to the side of the flat circuit body 1 where the crimping teeth 32 are bent to pierce the insulating layer, for better electrical protection and improved mechanical strength of the structure.

Further, referring to fig. 6, the present application further provides a cell voltage collecting circuit, which includes a collecting plate 5, a cell, and the above-mentioned flat circuit body with a safety mechanism. The battery cell includes a plurality of battery cells 71 connected in series in this order, and the acquisition board 5 is connected with the first end of the flat circuit body 1 through the connector 6, and the end of each conductor 11 in the second end of the flat circuit body 1 is connected with the electrode of the corresponding battery cell 71.

A plurality of connectors 6 are generally provided on the pickup plate 5, and each connector 6 is connected to one flat circuit body 1. Because the flat circuit body 1 (such as an FFC or a PFC) has a small volume and a light weight, and can collect a small voltage, the collecting board 5 collects a voltage signal in the battery unit 71 by using the flat circuit body 1 more at present, and converts the signal into a digital signal and sends the digital signal to a corresponding controller. However, in the prior art, the flat circuit body 1 cannot be connected to a conventional fuse box, so that the circuit cannot be protected, and potential safety hazards exist.

The flat circuit body with the safety mechanism is applied to voltage acquisition of the battery monomer in the application, so that the voltage acquisition loop of the battery monomer has the function of a fuse, the safety protection of the voltage acquisition loop is realized, and the space cost and the weight cost of the whole vehicle are saved.

In practical applications, because of the large number of the battery cells 71, in order to facilitate the voltage monitoring, the battery unit includes a plurality of pairs of battery packs 7 connected in series, each pair of battery packs 7 includes two battery cells 71 connected in series, and the end of each conductor 11 in the flat circuit body 1 is connected to the electrode of one battery cell 71 in the corresponding battery pack 7.

For example, the negative electrode of the former battery cell 71 in each pair of battery packs 7 is connected to the positive electrode of the latter battery cell 71, the negative electrode of the latter battery cell 71 is connected to the positive electrode of the former battery cell 71 in the next pair of battery packs 7, and each conductor 11 in the flat circuit body 1 is connected to the positive electrode of the corresponding former battery cell 71 in the pair of battery packs 7. In this way, the data collected by two adjacent conductors 11 in the flat circuit body 1 is the total voltage of two battery units 71, and the monitoring is more convenient.

The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications of the invention without departing from the spirit and principles of the invention should be considered within the scope of the invention.

Claims

1. A flat circuit body with a safety mechanism is characterized by comprising a flat circuit body, a conductive mechanism and a safety mechanism;

the flat circuit body includes at least one conductor and an insulator wrapping the conductor, the conductor having a broken portion; the conductive mechanism is electrically connected with the safety mechanism and the conductors on two sides of the disconnecting part.

2. The flat circuit body with a safety mechanism as claimed in claim 1,

the conducting mechanism comprises at least two conducting units, the inner side ends of the conducting units are electrically connected with the corresponding end parts of the safety mechanism, and the outer side ends of the conducting units are electrically connected with the corresponding conductors in two sides of the disconnecting part.

3. The flat circuit body with a safety mechanism according to claim 2,

the flat circuit body with the safety mechanism further comprises an insulating shell, the safety mechanism is arranged in the insulating shell, the insulating shell is close to the disconnecting portion, and the inner side end of the conductive unit can penetrate through the insulating shell and is connected with the corresponding end portion of the safety mechanism.

4. The flat circuit body with a safety mechanism according to claim 3,

a metal fastener penetrates through the insulating shell and is used for fixing the inner side end of the conductive unit and the end part of the safety mechanism; or

And the inner side end of the conductive unit is welded and fixed with the end part of the safety mechanism.

5. The flat circuit body with a safety mechanism according to claim 3,

the insulating shell is a transparent shell.

6. The flat circuit body with a safety mechanism according to claim 3,

the outer ends of the conductive units are electrically connected with the corresponding conductors through piercing and crimping.

7. The flat circuit body with a safety mechanism of claim 6,

each conductive unit comprises a bottom plate and a plurality of crimping teeth arranged at the edges of two sides of the bottom plate, and the end part of the bottom plate can penetrate through the insulating shell and is connected with the end part of the safety mechanism;

each of the crimping teeth is pierceable by the insulator on both sides of the corresponding conductor and the insulator outside the surface on one side of the conductor, and crimped to the surface of the conductor.

8. The flat circuit body with a safety mechanism as claimed in claim 7,

the crimping teeth on the two sides of the bottom plate are arranged in a staggered mode along the length direction of the bottom plate.

9. The flat circuit body with a safety mechanism as claimed in claim 1,

an insulating tape is bonded to at least one side surface of the flat circuit body at a position corresponding to the conductive mechanism.

10. The flat circuit body with a safety mechanism as claimed in claim 1,

the flat circuit body is an FPC or an FFC.

11. A cell voltage acquisition circuit, comprising an acquisition board, a cell and the flat circuit body with a safety mechanism as claimed in any one of claims 1 to 10;

the battery monomer is including a plurality of battery cell of series connection in proper order, gather the board pass through the connector with the first end of flat circuit body is connected, in the second end of flat circuit body each the tip of conductor all with corresponding battery cell's electrode connection.

12. The cell voltage acquisition circuit of claim 11,

the battery cell includes a plurality of pairs of battery packs connected in series, each pair of battery packs including two of the battery cells connected in series, an end portion of each of the conductors in the flat circuit body being connected to an electrode of one of the battery cells in the corresponding battery pack.