CN211909301U

CN211909301U - Battery core assembling structure and battery

Info

Publication number: CN211909301U
Application number: CN202020542420.3U
Authority: CN
Inventors: 陈利丁; 李武岐
Original assignee: Shenzhen Xinwangda Intelligent Technology Co ltd
Current assignee: Shenzhen Xinwangda Intelligent Technology Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-11-10
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses an assembly structure and battery of electric core, wherein the assembly structure of electric core, include: the PCB board, the FPC board and a clamping structure for connecting the PCB board and the FPC board; the clamping structure comprises: the first connecting part is arranged on the PCB, the second connecting part is arranged on the FPC board, the first connecting part is electrically connected with the PCB, the second connecting part is electrically connected with the FPC board, and the first connecting part is electrically connected with the second connecting part; the technical problem that the reject ratio of the battery is high due to the fact that the existing connection mode of the PCB and the FPC is easy to achieve is solved.

Description

Battery core assembling structure and battery

Technical Field

The utility model relates to the technical field of battery especially involves an assembly structure and battery of electric core.

Background

A lithium battery of the mobile phone is provided with a PCB, the PCB is welded with an FPC board, and the FPC board is buckled and connected with a mainboard of the mobile phone, so that the battery is connected with the mainboard of the mobile phone through the FPC.

At present, a PCB (printed Circuit Board) and an FPC (Flexible printed Circuit) board of a battery are mainly fixed in a welding mode; the PCB is provided with at least two welding pads with different electrical properties, and the welding pads are connected with the FPC by using soldering tin; however, in the production process of the connection mode, as the soldering tin is melted and then solidified again, fine tin beads or tin wires are easily formed on the surface of the PCB by the melted tin, and the fine tin beads or the tin wires are difficult to see by naked eyes, so that the fine tin beads or the tin wires are difficult to clean; the solder balls or solder wires connect the solder pads with different electrical properties, so that short circuit occurs between the solder pads with different electrical properties, and further the electrical function of the PCB is poor. Therefore, the conventional connection method between the PCB and the FPC has the technical problem of very high battery defect rate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an assembly structure and battery of electricity core aims at solving the connected mode of present PCB board and FPC board and causes the technical problem that the defective rate of battery is high easily.

The utility model provides an assembly structure of electric core, include: the PCB board, the FPC board and a clamping structure for connecting the PCB board and the FPC board; the clamping structure comprises: the first connecting part is arranged on the PCB, and the second connecting part is arranged on the FPC board; the first connecting portion is electrically connected with the PCB, the second connecting portion is electrically connected with the FPC, and the first connecting portion is electrically connected with the second connecting portion.

Further, the first connecting portion is provided as a recessed portion; the second connecting portion is provided as a protruding portion.

Further, the recessed portion includes a first recessed portion and a second recessed portion, and the protruding portion includes a first protruding portion and a second protruding portion; the first protruding portion is connected with the first concave portion in an inserting mode, and the second protruding portion is connected with the second concave portion in an inserting mode.

Further, the surface area of the first boss is greater than the surface area of the second boss.

Further, the first protruding portion is a rectangular body, and the second protruding portion is a cylinder.

Further, the bottoms of the first concave part and the second concave part are provided with bonding layers.

Further, the inner walls of the first concave part and the second concave part are both provided with copper foils.

Further, a reinforcing plate is arranged on one surface, far away from the protruding portion, of the FPC board.

Further, the reinforcing plate is provided as a superconducting aluminum material.

The utility model also discloses a battery, including above the package assembly of electric core.

The utility model discloses the beneficial effect who brings: the clamping connection mode is used, the traditional welding mode is not needed, soldering tin is cancelled, short circuit of the soldering tin on the bonding pad is avoided, and the reject ratio of products is reduced; the technical problem that the reject ratio of the battery is high due to the fact that the existing connection mode of the PCB and the FPC is easy to achieve is solved. Because the FPC board and the PCB are connected without soldering tin, the connection between the FPC board and the PCB is realized by directly clamping the clamping structures on the FPC board and the PCB, the production process is reduced, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention when a PCB board and a FPC board are connected together;

fig. 2 is a cross-sectional view of a PCB board according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an embodiment of the FPC board structure of the present invention.

In the figure: 1. a PCB board; 2. an FPC board; 31. a first recess; 32. a second recess; 33. a first boss portion; 34. a second boss portion; 35. a reinforcing plate.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

An assembled structure of a battery cell, as shown in fig. 1, 2 and 3, includes: the PCB comprises a PCB 1, an FPC 2 and a clamping structure for connecting the PCB 1 and the FPC 2; the joint structure includes: the first connecting part is arranged on the PCB 1, and the second connecting part is arranged on the FPC board 2; the first connecting portion is electrically connected with the PCB, the second connecting portion is electrically connected with the FPC, and the first connecting portion is electrically connected with the second connecting portion.

In this embodiment, the PCB is electrically connected to the battery cell, and the PCB is used to protect the battery cell and prevent the battery cell from being overcharged or overdischarged; one end of the PCB 1, which is far away from the FPC board 2, is electrically connected with the battery cell through welding, and a protection circuit is arranged on the PCB 1 and used for protecting the battery cell and avoiding over-charging or over-discharging of the battery cell; preferably, the clamping structure is a clamping structure of a clamping groove type, namely, a clamping groove is arranged on the PCB 1 or the FPC 2, a bulge is correspondingly arranged on the FPC 2 or the PCB 1, and the bulge is inserted into the clamping groove so as to connect the PCB 1 and the FPC 2; the clamping structure can be set to be a buckle structure according to requirements, and a detachable buckle is arranged on the PCB 1 or the FPC 2; the clamping structure is arranged to be a clamping groove type clamping structure, so that the production process is simple, and the production cost is reduced; the first connecting part and the second connecting part are buckled with each other, and the PCB 1 and the FPC 2 are connected in a clamping manner without using a traditional welding manner, so that soldering tin is cancelled, short circuit of the soldering tin on a bonding pad is avoided, and the reject ratio of a product is reduced; the technical problem that the reject ratio of the battery is high due to the fact that the existing connection mode of the PCB 1 and the FPC 2 is easy to achieve is solved. The FPC board 2 and the PCB board 1 are connected without soldering tin, and the clamping structures on the FPC board 2 and the PCB board 1 are directly clamped to realize the connection between the FPC board 2 and the PCB board 1, so that the production process is reduced, and the production cost is reduced; the first connecting portion and the second connecting portion are made of conductive materials, so that the PCB 1 and the FPC board 2 are electrically connected.

In one embodiment, the first connecting portion is provided as a recess; the second connecting portion is provided as a protruding portion.

In the embodiment, the concave part is arranged on the PCB 1, the convex part is arranged on the FPC board 2, the strength of the PCB 1 is stronger than that of the FPC, and the concave part is arranged on the PCB 1, so that the structural strength of the concave part is stronger than that of the FPC board 2, the possibility of deformation of the concave part due to the thinner thickness is reduced, the strength of the concave part is improved, and the strength of the clamping structure is further improved; the clamping structure is arranged to be a clamping groove type clamping structure, the PCB 1 and the FPC 2 can be connected together only by buckling the convex part on the concave part, and the operation is simple; in addition, the welding is to laminate the welded fastening mutually with the one side of FPC board 2 and PCB board 1 orientation each other, and adopts draw-in groove formula joint structure joint, is three-dimensional connected mode, changes welded mode into draw-in groove formula connected mode, under the same planar area that occupies FPC board 2 and PCB board 1, has increased the area of contact between FPC board 2 and the PCB board 1, so has increased the connection reliability between FPC board 2 and the PCB board 1.

In one embodiment, the recess comprises a first recess 31 and a second recess 32, and the protrusion comprises a first protrusion 33 and a second protrusion 34; the first convex portion 33 is inserted into the first concave portion 31, and the second convex portion 34 is inserted into the second concave portion 32.

In this embodiment, two first protruding portions 33 are provided, and corresponding points are provided with first recessed portions 31 respectively connected to the positive and negative electrodes of the battery; two second convex parts 34 and two second concave parts 32 are arranged for different signals to flow through; the junction of the first concave part 31 and the first convex part 33 forms an overcurrent channel, and the junction of the second concave part 32 and the second convex part 34 forms a signal channel; in other embodiments, the first concave portion 31 and the second concave portion 32 may be disposed on the PCB 1 and the FPC 2, the corresponding first convex portion 33 and the second convex portion 34 are disposed on the FPC 2 and the PCB 1, and the first concave portion 31 and the second concave portion 32 and the first convex portion 33 and the second convex portion 34 are alternately disposed, so that the mutual fastening is more stable.

In one embodiment, the surface area of the first raised portion 33 is greater than the surface area of the second raised portion 34.

In the present embodiment, since the junction of the first recess 31 and the first protrusion 33 forms an overcurrent passage that requires an excessive current, the surface area of the first protrusion 33 is set large, that is, the contact area between the PCB 1 and the FPC 2 through the overcurrent passage is increased, so that the reliability of the conduction of electricity between the FPC 2 and the PCB 1 is ensured; because the connecting part of the second concave part 32 and the second convex part 34 forms a channel through which an over signal flows, and a large current does not need to pass, the contact area of the second concave part 32 and the second convex part 34 can be reduced, namely, the volumes of the second concave part 32 and the second convex part 34 are reduced, and further, the area of the plane where the second concave part 32 and the second convex part 34 occupy the PCB (printed circuit board) 1 and the FPC (flexible printed circuit) 2 is reduced, so that the structure between the PCB 1 and the FPC 2 is more compact.

In one embodiment, the first protrusion 33 is configured as a rectangular body, and the second protrusion 34 is configured as a cylinder.

In the present embodiment, the first protruding portion 33 is provided as a rectangular body having a length of 4.6 mm, a width of 1.5 mm, and a height of 1.5 mm; the corresponding first concave portion 31 is a rectangular groove with a length of 4.6 mm, a width of 1.5 mm and a depth of 1.5 mm; the second concave part 32 is a cylindrical groove with a diameter of 0.5 mm and a depth of 0.6 mm, and the second convex part 34 is a cylinder with a diameter of 0.5 mm and a height of 0.6 mm; the first convex part 33 is rectangular, and the PCB 1 and the FPC 2 are slender objects, so that the contact area of the first convex part 33 and the first concave part 31 is ensured to be increased, and the area of the plane of the PCB 1 occupied by the first concave part 31 is reduced; the contact area between the PCB 1 and the FPC 2 is increased as much as possible over a limited area on the PCB 1 and the FPC 2.

In one embodiment, the bottom of each of the first recess 31 and the second recess 32 is provided with an adhesive layer.

In this embodiment, the adhesive layer may be provided as a conductive material or an insulating material; when the bonding layer is made of an insulating material, the side wall of the first concave part 31 is provided with a conductive material, so that the first concave part 31 and the PCB 1 are electrically connected; in this embodiment, the bonding layer is preferably made of solder paste, and after the first protruding portion 33 and the second protruding portion 34 are respectively fastened to the recessed portions, the solder paste is heated to melt the solder paste, so as to fixedly connect the PCB 1 and the FPC 2; the bonding layer is arranged in the concave part, and the molten solder paste is arranged in the concave part, so that the anode and the cathode are not communicated due to overflow, and the short circuit of the anode and the cathode is avoided; in other embodiments, the first protruding portion 33 and the second protruding portion 34 are spherical balls, the corresponding first recessed portion 31 and the second recessed portion 32 are spherical grooves, the first protruding portion 33 is directly clamped into the first recessed portion 31, the second protruding portion 34 is clamped into the second recessed portion 32, the first protruding portion 33 and the second protruding portion 34 are clamped into the spherical recessed portion, an adhesive layer is not required to be arranged at this time, the PCB 1 and the FPC 2 can be fixedly connected, and when the use is not required, or when the problem of the electric core needs to be detected, the PCB 1 and the FPC 2 can be detached without damage.

In one embodiment, the first recess 31 and the second recess 32 have the same depth.

In the present embodiment, it is preferable that the depth of the first recess 31 and the depth of the second recess 32 are set to be 0.6 mm, and the height of the first protrusion 33 and the height of the second protrusion 34 are set to be 0.6 mm, so that the PCB 1 and the FPC 2 are more compact and compatible.

In one embodiment, the inner walls of the first recess 31 and the second recess 32 are both provided with copper foil.

In the embodiment, the convex parts are all provided with solid conductors formed by copper foil electroplating, so that the PCB board 1 and the FPC board 2 have conductivity; meanwhile, the copper foil has good electrical conductivity and thermal conductivity, so that the overcurrent capacity between the first concave part 31 and the first convex part 33 is increased, and the heat dissipation capacity between the concave part and the convex part is increased.

In one embodiment, the surface of the FPC board 2 away from the protrusion is provided with a stiffener 35.

In this embodiment, the reinforcing plate 35 is provided to enhance the strength of the protruding portion, and reduce the risk of deformation or even breakage of the protruding portion due to external force.

In one embodiment, the stiffener 35 is provided as a superconducting aluminum material.

In the embodiment, the superconducting aluminum material has light weight, high strength and good thermal conductivity, and is convenient for dissipating heat generated by the FPC board 2 and the PCB board 1; is beneficial to heat dissipation.

A battery comprises the above-mentioned cell assembly structure.

In this embodiment, because the battery adopts the above-mentioned package assembly of electric core, has the whole advantages of the package assembly of above-mentioned electric core, has avoided soldering tin to cause the short circuit to the welding disc, has reduced advantages such as the defective rate of product.

The utility model discloses the principle of implementing does: preferably, the clamping structure is a clamping structure of a clamping groove type, namely, a clamping groove is arranged on the PCB 1 or the FPC 2, a bulge is correspondingly arranged on the FPC 2 or the PCB 1, and the bulge is inserted into the clamping groove so as to connect the PCB 1 and the FPC 2; the clamping structure can be set to be a buckle structure according to requirements, and a detachable buckle is arranged on the PCB 1 or the FPC 2; the clamping structure is arranged to be a clamping groove type clamping structure, so that the production process is simple, and the production cost is reduced; the first connecting part and the second connecting part are buckled with each other, and the PCB 1 and the FPC 2 are connected in a clamping manner without using a traditional welding manner, so that soldering tin is cancelled, short circuit of the soldering tin on a bonding pad is avoided, and the reject ratio of a product is reduced; the technical problem that the reject ratio of the battery is high due to the fact that the existing connection mode of the PCB 1 and the FPC 2 is easy to achieve is solved. Because the FPC board 2 and the PCB board 1 are connected without soldering tin, the connection between the FPC board 2 and the PCB board 1 is realized by directly clamping the clamping structures on the FPC board 2 and the PCB board 1, the production process is reduced, and the production cost is reduced.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. An assembly structure of a battery cell, comprising: the PCB board, the FPC board and a clamping structure for connecting the PCB board and the FPC board; the clamping structure comprises a first connecting part and a second connecting part which are mutually matched, the first connecting part is arranged on the PCB, and the second connecting part is arranged on the FPC board; the first connecting portion is electrically connected with the PCB, the second connecting portion is electrically connected with the FPC, and the first connecting portion is electrically connected with the second connecting portion.

2. The assembly structure of the battery cell according to claim 1, wherein the first connection portion is provided as a recess; the second connecting portion is provided as a protruding portion.

3. The assembled structure of the battery cell of claim 2, wherein the recess comprises a first recess and a second recess, and the protrusion comprises a first protrusion and a second protrusion; the first protruding portion is connected with the first concave portion in an inserting mode, and the second protruding portion is connected with the second concave portion in an inserting mode.

4. The assembled structure of the battery cell of claim 3, wherein the surface area of the first protruding portion is larger than the surface area of the second protruding portion.

5. The battery cell assembly structure of claim 4, wherein the first protruding portion is a rectangular body, and the second protruding portion is a cylindrical body.

6. The battery cell assembly structure of claim 3, wherein the bottom of each of the first and second recessed portions is provided with an adhesive layer.

7. The battery cell assembly structure according to claim 3, wherein inner walls of the first and second recesses are each provided with a copper foil.

8. The assembly structure of the battery cell according to claim 2, wherein a reinforcing plate is disposed on a surface of the FPC board away from the protrusion.

9. The battery cell assembly structure of claim 8, wherein the reinforcing plate is made of a superconducting aluminum material.

10. A battery comprising an assembled structure of the cell defined in any one of claims 1 to 9.