CN217641647U

CN217641647U - Protection board subassembly, battery and electronic equipment of battery

Info

Publication number: CN217641647U
Application number: CN202220700982.5U
Authority: CN
Inventors: 丁才华; 刘子豪
Original assignee: Beijing Honor Device Co Ltd
Current assignee: Beijing Honor Device Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-10-21
Anticipated expiration: 2032-03-28

Abstract

The application provides a protection board subassembly, battery and electronic equipment of battery relates to electronic equipment technical field. The battery protection plate is used for solving the problems that the existing battery protection plate occupies a large space, is not beneficial to increasing the capacity of a battery and is not beneficial to miniaturization of the whole machine. The protection plate component of the battery is used for being electrically connected with the battery body and comprises a circuit board, at least one component and a plastic packaging layer. The circuit board has a first surface. At least one component is disposed on the first surface. The plastic packaging layer covers the first surface and wraps the component; an avoiding structure is arranged on the plastic packaging layer.

Description

Protection board subassembly, battery and electronic equipment of battery

Technical Field

The application relates to the technical field of electronic equipment, especially, relate to a protection shield subassembly, battery and electronic equipment of battery.

Background

With the rapid development of mobile terminal devices, the integration level is higher and higher, and the function modules are more and more, which brings about the problems of the increase of the power consumption of the devices and the reduction of the standby time. In order to improve the endurance of the mobile terminal, increasing the battery capacity is one of the main approaches.

The battery protection board can be generally integrated in the battery, and the battery protection board can play a role in protecting the battery in the charging and discharging process, so that the problems of overcharge, overdischarge, short circuit and the like are avoided.

However, the conventional battery protection board occupies a large space inside the mobile terminal, and thus, it is disadvantageous to increase the battery capacity. Meanwhile, the battery protection board has larger volume and is not beneficial to the miniaturization of the whole machine.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a protection board subassembly, battery and electronic equipment of battery for it is great to solve battery protection board occupation space, is unfavorable for increasing battery capacity, and is unfavorable for the miniaturized problem of complete machine.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a protection board assembly of a battery is provided for being electrically connected with a battery body, and the protection board assembly comprises a circuit board, at least one component and a plastic package layer. The circuit board has a first surface. At least one component is disposed on the first surface. The plastic packaging layer covers the first surface and wraps the component; an avoiding structure is arranged on the plastic packaging layer.

The embodiment of the utility model provides a protection plate subassembly dodges the structure through setting up on plastic-sealed layer, can hold the salient structure on battery body surface, for example annotate the liquid mouth to avoid increasing the distance between plastic-sealed layer and the battery body, thereby be favorable to reducing the whole space that occupies at mobile terminal of protection plate subassembly, be favorable to increasing battery capacity on the one hand, on the other hand has reduced the space that protection plate subassembly occupy, is favorable to the miniaturization of terminal complete machine.

The utility model discloses an in some embodiments, dodge the notes liquid mouth that the structure is used for holding battery body. When the notes liquid mouth of battery body set up between the terminal surface of protection board subassembly and battery body, hold this notes liquid mouth through dodging the structure, can avoid increasing the distance between plastic envelope and the battery body of protection board subassembly to can reduce the whole volume of protection board subassembly.

The utility model discloses an in some embodiments, dodge the electrode column that the structure is used for holding battery body. When the electrode column of the battery body is arranged between the end faces of the protection plate assembly and the battery body, the electrode column is accommodated through the avoiding structure, the increase of the distance between the plastic sealing layer of the protection plate assembly and the battery body is avoided, and therefore the overall size of the protection plate assembly can be reduced.

The utility model discloses an in some embodiments, dodge the structure including dodging the groove, dodge the groove and offer on the face that the first surface was kept away from on the plastic envelope layer. Offer through keeping away from the groove on the face of first surface at plastic-sealed layer to can hold the notes liquid mouth of battery body, in order to avoid increasing the distance between plastic-sealed layer and the battery body, be favorable to reducing the space that the protection shield subassembly occupy.

In some embodiments of the present invention, the components include a first component and a second component, the first component is disposed in an area covered by an orthographic projection of the avoidance slot on the first surface, and the second component is disposed outside the area covered by the orthographic projection of the avoidance slot on the first surface; the first component has a first thickness along a thickness perpendicular to the first surface, the second component has a second thickness along a thickness perpendicular to the first surface, and the first thickness is less than the second thickness. Thus, the components with smaller thickness can be arranged in the region corresponding to the avoidance groove, and the components with larger thickness are arranged in the region except the region corresponding to the avoidance groove, so that the mounting region of the components can not be reduced while the space occupied by the protection plate assembly is reduced, and the situation that the components on the first surface are reduced due to the fact that the mounting region of the components is reduced is avoided.

In some embodiments of the present invention, the cross-sectional shape of the avoiding groove parallel to the first surface is circular, elliptical or polygonal.

The utility model discloses an in some embodiments, dodge the structure including dodging the hole, dodge the hole and run through the plastic envelope layer. Set up on the plastic envelope layer and dodge the hole to can hold the notes liquid mouth of battery body. And, when forming the plastic envelope layer, can hold the district of annotating the liquid mouth of battery body in needs, not set up the plastic envelope layer to can form and dodge the hole, be favorable to reducing the processing degree of difficulty.

In some embodiments of the present invention, the avoiding hole is a circular hole, an elliptical hole or a polygonal hole.

In some embodiments of the present invention, the circuit board includes a PCB board and a FPC board. The surface of the PCB facing the battery body is a first surface. The FPC board is welded on the surface of the PCB far away from the plastic package layer. The structure that the FPC board is combined with the PCB board is adopted, components are arranged on the PCB board, the PCB board is welded with the FPC board, and then the PCB board is electrically connected with external components through the FPC board, so that the battery body is protected.

In some embodiments of the present invention, the protection plate assembly further comprises a positive electrode nickel plate and a negative electrode nickel plate, both of which are welded on the surface of the FPC board away from the PCB; the positive electrode nickel sheet is used for being electrically connected with the positive electrode of the battery body, and the negative electrode nickel sheet is used for being electrically connected with the negative electrode of the battery body. Therefore, the electric connection between the protection plate assembly and the battery body can be realized, and the problems of overcharge, overdischarge, short circuit and the like of the battery can be avoided through the protection plate assembly.

In some embodiments of the utility model, a part of negative pole nickel piece and the inner wall laminating of dodging the structure. After the negative pole nickel piece extends to one side near battery body by the one side of keeping away from battery body, make the laminating of negative pole nickel piece and the inner wall of dodging the structure, along the direction on the perpendicular to first surface promptly, the height of annotating the liquid mouth of battery body and the thickness of negative pole nickel piece all dodge through dodging the structure formation to the thickness of avoiding the negative pole nickel piece leads to the distance between plastic envelope and the battery body to increase.

In some embodiments of the utility model, the part that negative pole nickel piece and battery body's negative pole electricity are connected is in between battery body and the plastic envelope layer. Under this condition, the one end of negative pole nickel piece and FPC board keep away from the surface welding of PCB board, and the other end is in between battery body and the plastic envelope layer, so, can make negative pole nickel piece form the parcel to circuit board and plastic envelope layer, help improving the holistic connection of protection shield subassembly slight, are favorable to improving the reliability of protection shield subassembly.

The utility model discloses an in some embodiments, battery protection shield subassembly still includes the glue film, and the glue film sets up in a side surface that the circuit board was kept away from on the plastic envelope layer, the glue film be used for with battery body fixed connection. Realize bonding fixedly between messenger's battery body and the plastic envelope layer through the glue film to make the protection board subassembly be fixed in on the battery body, take place with the condition of avoiding battery body and protection board subassembly alternate segregation.

The utility model discloses an in some embodiments, battery protection shield subassembly still includes the reinforcement protective layer, and the one side of first surface is kept away from to the reinforcement protective layer laminating in the circuit board, consolidates protective layer parcel circuit board and plastic envelope layer to with battery body fixed connection. In this way, the connection strength between the protection plate assembly and the battery body can be further improved by reinforcing the protection layer, and the reliability of the protection plate assembly can be further improved.

In some embodiments of the present invention, the component includes at least one of a chip, a capacitor and an inductor.

In a second aspect, a battery is provided, which comprises a battery body and the protection plate assembly according to any one of the above aspects. The end face of the battery body is provided with a liquid injection port. The protection plate component is fixed on the end face of the battery body, and the liquid injection port is arranged in the avoiding structure of the protection plate component. The embodiment of the utility model provides a battery owing to include as above arbitrary scheme protection shield subassembly, consequently, can solve the same technical problem to gain the same technological effect.

In a third aspect, an electronic device is provided, comprising a housing and a battery as described above, the battery being disposed within the housing. The embodiment of the utility model provides an electronic equipment, owing to include like the above scheme the battery, consequently, can solve the same technical problem to gain the same technological effect.

Drawings

Fig. 1 is a block diagram of an electronic device according to an embodiment of the present disclosure;

fig. 2 is an exploded view of an electronic device according to an embodiment of the present disclosure;

fig. 3 is a structural view of a battery provided in the related art;

FIG. 4 is a side view of the battery provided in FIG. 3;

fig. 5 is a structural view of another battery provided in the related art;

fig. 6 is a structural view of still another battery provided in the related art;

fig. 7 is a structural diagram of a battery provided in an embodiment of the present application;

fig. 8 is an assembly view of the protection plate assembly and the battery body in the battery of fig. 7;

fig. 9 is an exploded view of a protection plate assembly and a battery body according to an embodiment of the present disclosure;

fig. 10 is a structural view of another battery provided in the embodiment of the present application;

FIG. 11 is a block diagram of the protective plate assembly provided in FIG. 10;

fig. 12 is a structural view of a battery body according to an embodiment of the present application;

fig. 13 is a distribution structure diagram of a first component and a second component provided in an embodiment of the present application;

FIG. 14 is a block diagram of another protection plate assembly provided in an embodiment of the present application;

fig. 15 is a flowchart of a method for manufacturing a protection plate assembly according to an embodiment of the present application;

fig. 16 is a structural view of a PCB provided in an embodiment of the present application;

fig. 17 is a structural diagram of a plurality of components disposed on a first surface of a PCB provided in an embodiment of the present application;

FIG. 18 is a block diagram of the formation of a molding layer on a first surface provided herein;

fig. 19 is a structural view of an FPC board provided in an embodiment of the present application;

fig. 20 is a structural diagram of the FPC board and the PCB board after being soldered according to the embodiment of the present application;

fig. 21 is a structural diagram illustrating welding of a negative electrode nickel plate of a protection plate assembly with a battery body according to an embodiment of the present disclosure;

fig. 22 is a structural view of another avoidance structure provided in the embodiment of the present application;

fig. 23 is a view illustrating a coupling structure of the protection plate assembly and the battery body provided in fig. 22;

fig. 24 is a structural view of an avoidance hole provided in the middle of the present application;

fig. 25 is a view showing a coupling structure of the protection plate assembly and the battery body provided in fig. 24.

Description of the drawings: 10-an electronic device; 11-screen; 12-middle frame; 13-a rear shell; 14-a battery; 100-a battery body; 110-positive pole; 120-negative contact; 130-liquid injection port; 200-a protection plate assembly; 210-a circuit board; 211-a PCB board; 211 a-a first surface; 212-FPC board; 220-positive electrode nickel sheet; 230-negative nickel plate; 240-components; 240 a-first component; 240 b-second component; 250-plastic packaging layer; 251-an avoidance structure; 252-avoidance slots; 253-avoiding holes; 260-reinforcing protective layer.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

In addition, in the present application, the directional terms "upper", "lower", etc. are defined relative to the schematically disposed orientation of the components in the drawings, and it is to be understood that these directional terms are relative concepts that are used for descriptive and clarifying purposes and that will vary accordingly depending on the orientation in which the components are disposed in the drawings.

In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection, a removable connection, or an integral part; may be directly connected or indirectly connected through an intermediate.

The present application provides an electronic device, which may include a device such as a mobile phone, a tablet personal computer (tablet personal computer), a laptop computer (laptop computer), a Personal Digital Assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, augmented Reality (AR) glasses, an AR helmet, virtual Reality (VR) glasses, or a VR helmet. The embodiment of the present application does not specifically limit the specific form of the electronic device. For convenience of description, the electronic device is taken as a mobile phone for illustration. Referring to fig. 1, fig. 1 is a structural diagram of an electronic device 10 (a mobile phone) according to an embodiment of the present disclosure.

As described above, in the present embodiment, the electronic device 10 is a mobile phone. Referring to fig. 2, fig. 2 is an exploded view of the electronic device provided in fig. 1, and the electronic device 10 may include a screen 11, a middle frame 12 and a rear case 13. The middle frame 12 and the rear case 13 of the electronic device 10 constitute a housing of the electronic device 10, which protects components inside the electronic device 10 and can make the appearance of the electronic device 10 more beautiful. Also disposed within the housing is a battery 14, the battery 14 being used to power the electronic device 10.

Referring to fig. 3, fig. 3 is a structural diagram of a battery 14 according to the related art. The battery 14 includes a battery body 100 and a protection plate assembly 200 fixedly connected to the battery body 100, wherein the protection plate assembly 200 is electrically connected to the battery body 100, and can protect the battery body 100 during charging and discharging by the protection plate assembly 200, thereby avoiding problems such as overcharge, overdischarge, and short circuit.

The battery body 100 is provided with a positive post 110, a negative contact 120 and an injection port 130, the positive post 110 and the negative contact 120 are electrically connected to the protection plate assembly 200, and the injection port 130 is used for injecting electrolyte.

The protection plate assembly 200 comprises a circuit board 210, the circuit board 210 adopts a scheme that a PCB 211 and an FPC 212 are combined into an integral structure, welding spots on the PCB 211 are electrically connected with a positive post 110 of the battery body 100 through a positive nickel sheet 220 and are electrically connected with a negative contact 120 of the battery body 100 through a negative nickel sheet 230, a plurality of components 240 are arranged on the surface of the PCB 211 far away from the battery body 100, and finally the protection plate assembly 200 is wrapped and fixed on the battery body 100 through a plastic sealing layer 250, so that the integral reliability can be improved.

However, in this embodiment, the PCB 211, the positive electrode nickel sheet 220, the negative electrode nickel sheet 230, and the component 240 (the component 240 includes at least one of a chip, a capacitor, an inductor, and other electronic components) on the PCB 211 are integrally molded, which results in a large overall volume. Specifically, referring to fig. 4, fig. 4 is a side view of the battery 14 provided in fig. 3. The distance between the PCB 211 and the battery body 100 is the thickness H1 (about 0.4 mm) of the positive electrode nickel sheet 220 plus the height H2 (about 0.6 mm) of the positive electrode post 110, that is, the distance between the PCB 211 and the battery body 100 is 1mm, and the overall thickness H3 of the component 240 plastically packaged on the side of the PCB 211 away from the battery body 100 is at least 0.5mm; therefore, the whole thickness of the protection board assembly 200 is large, the space inside the shell is occupied more, the capacity of the battery body 100 is not improved, and the miniaturization of the whole terminal is not facilitated.

In order to reduce the overall thickness of the protection plate assembly 200, another protection plate assembly 200 is provided in the related art, and referring to fig. 5, fig. 5 is a structural view of another battery 14 provided in the related art. The circuit board 210 is configured such that the PCB 211 and the FPC 212 are electrically connected to each other, that is, the PCB 211 and the FPC 212 are electrically connected to each other by soldering on one side surface of the PCB 211. Then, a plurality of components 240 are arranged on the other side surface of the PCB 211, and the plurality of components 240 are subjected to plastic package to form a plastic package layer 250, and the plastic package layer 250 is contacted with the back adhesive on the battery body 100 to realize fixation. The FPC board 212 is provided with a positive electrode nickel plate 220 and a negative electrode nickel plate 230 on the side away from the PCB board 211, and is welded to the positive post 110 and the negative contact 120 of the battery body 100, respectively.

In this scheme, set up components and parts 240 between PCB board 211 and battery body 100, need not carry out the plastic envelope from making in the one side that battery body 100 was kept away from to PCB board 211, be favorable to reducing the thickness that battery body 100 one side was kept away from to PCB board 211. Moreover, since the positive post 110 of the battery body 100 is located on one side of the plastic package layer 250, only the thickness of the nickel plate (0.1 mm) plus the back adhesive (0.1 mm) is arranged between the plastic package layer 250 and the battery body 100, thereby reducing the overall thickness of the protection plate assembly 200.

However, referring to fig. 6, fig. 6 is a structural view of another battery provided in the related art. When the area of the PCB 211 is increased, the entire protection board assembly 200 and the injection opening 130 on the end surface of the battery body 100 cannot be arranged in a staggered manner, that is, the injection opening 130 is located between the plastic package layer 250 and the battery body 100. To avoid the pouring outlet 130, it is necessary to increase the distance between the plastic seal layer 250 and the end surface of the battery body 100 to accommodate the pouring outlet 130. As a result, the distance between the molding layer 250 and the end surface of the battery body 100 is increased, resulting in an increase in the thickness of the protection plate assembly 200.

Referring to fig. 7 for solving the above problems, fig. 7 is a structural diagram of a battery 14 according to an embodiment of the present application, in which a protection board assembly 200 of the battery 14 includes a circuit board 210, the circuit board 210 includes a PCB 211 and an FPC 212, and electrical connection between the PCB 211 and the FPC 212 is achieved by spot welding.

Referring to fig. 8, fig. 8 is an assembly view of the protection plate assembly 200 and the battery body 100 in the battery 14 shown in fig. 7. The protection plate assembly 200 further includes a plurality of components 240, a plastic-sealed layer 250, a positive nickel plate 220, and a negative nickel plate 230. The surface of the PCB 211 away from the FPC 212 is a first surface 211a, the plurality of components 240 are disposed on the first surface 211a, and the molding layer 250 covers the first surface 211a and wraps the plurality of components 240. The positive electrode nickel sheet 220 and the negative electrode nickel sheet 230 are both welded on the surface of the FPC board 212 far away from the PCB 211, the positive electrode nickel sheet 220 and the negative electrode nickel sheet 230 extend to the end of the battery body 100 along the side surfaces of the FPC board 212, the PCB 211 and the plastic package layer 250 after being bent, the positive electrode nickel sheet 220 is electrically connected with the positive post 110 of the battery body 100, the negative electrode nickel sheet 230 is electrically connected with the negative electrode contact 120 of the battery body 100, and the part of the negative electrode nickel sheet 230 electrically connected with the negative electrode contact 120 is arranged between the plastic package layer 250 and the battery body 100. The plastic package layer 250 is fixed to the battery body 100 by adhesive. The plastic package layer 250 is provided with a avoiding structure 251, and the avoiding structure 251 is used for accommodating the liquid injection port 130 of the battery body 100.

In this way, the liquid injection port 130 of the battery body 100 can be accommodated through the avoiding structure 251 on the plastic package layer 250, so that the distance between the plastic package layer 250 and the battery body 100, that is, the distance between the protection board assembly 200 and the end face of the battery body 100, does not need to be increased, the height of one liquid injection port 130 is reduced, and the space occupied inside the casing of the electronic device 10 shown in fig. 2 is saved, so that a larger space can be provided for the battery body 100 inside the casing, and the capacity of the battery body 100 can be increased.

It should be noted that the avoiding structure 251 can avoid not only the liquid injection port 130 of the battery body 100, but also other protruding structures provided on the surface of the battery body 100, for example, when the electrode column of the battery body 100 is located between the protection plate assembly 200 and the battery body 100, the avoiding structure 251 can also avoid the electrode column, so as to avoid increasing the distance between the protection plate assembly 200 and the battery body 100.

The above-described protection plate assembly 200 is described in detail below by way of specific examples.

Referring to fig. 9, fig. 9 is an exploded view of a protection plate assembly 200 and a battery body 100 according to an embodiment of the present disclosure. In the protection board assembly 200 provided in the embodiment of the present application, the avoiding structure 251 provided on the plastic package layer 250 may be an avoiding groove 252, the avoiding groove 252 is provided on the surface of the plastic package layer 250 away from the first surface 211a, and the liquid injection port 130 is provided in the avoiding groove 252. That is, the escape groove 252 forms the escape structure 251 for escaping from the liquid injection port 130, so that it is not necessary to increase the distance between the plastic sealing layer 250 and the battery body 100, thereby saving the space occupied by the protection board assembly 200.

For example, with continued reference to fig. 9, the avoiding groove 252 may be opened at the edge of the molding layer 250 and penetrate through the sidewall of the molding layer 250. At this time, by providing the liquid inlet 130 of the battery body 100 at a position corresponding to the escape groove 252, when the protection plate assembly 200 is fixed to the battery body 100, the liquid inlet 130 of the battery body 100 can be extended into the escape groove 252, and the liquid inlet 130 can be escaped.

The negative electrode nickel sheet 230 between the plastic sealing layer 250 and the battery body 100 may extend along the wall of the avoiding groove 252, and is finally electrically connected to the negative electrode contact 120 on the battery body 100. Thus, the escape groove 252 can accommodate the thickness of the negative electrode nickel plate 230 plus the liquid inlet 130, and the increase in thickness of the protection plate assembly 200 is avoided.

Referring to fig. 10 and 11, fig. 10 is a structural view of another battery 14 according to an embodiment of the present disclosure, and fig. 11 is a structural view of a protection plate assembly 200 shown in fig. 10. The avoiding groove 252 may be formed in the middle of the plastic package layer 250, that is, the avoiding groove 252 does not penetrate through the side wall of the plastic package layer 250, and the liquid inlet 130 of the battery body 100 may be formed at a position corresponding to the avoiding groove 252.

It should be noted that the cross-sectional shape of the bypass groove 252 of the protection plate assembly 200 along the direction parallel to the first surface 211a may be a circle, a polygon, an ellipse, or other irregular structures. It may serve as the liquid inlet 130 for accommodating the battery body 100, and the specific shape thereof may be determined according to the difficulty of opening the avoiding groove 252. Therefore, the present application is not particularly limited thereto.

Also, the avoiding groove 252 may be formed by providing a protruding structure with a desired shape, for example, a cylindrical structure, at a corresponding position in the mold during the injection molding process. Therefore, after the injection molding is completed, the avoidance groove 252 with a circular cross section can be formed at the corresponding position on the plastic package layer 250.

Therefore, referring to fig. 12, fig. 12 is a structural diagram of a battery body 100 according to an embodiment of the present disclosure. The injection port 130 of the battery body 100 provided in the present application may be provided at different positions, and when the protection plate assembly 200 shown in fig. 9 or 11 is manufactured and the plastic sealing layer 250 is formed, corresponding to the position of the injection port 130, the avoidance groove 252 may be provided at a corresponding position on the plastic sealing layer 250, so that the versatility of the protection plate assembly 200 can be improved.

Based on this, since the avoiding groove 252 is formed in the plastic package layer 250, the thickness of the plastic package layer 250 corresponding to the avoiding groove 252 is smaller than the thickness of the other positions along the direction perpendicular to the first surface 211a, and the thicknesses of the various components 240 are different, so that the components 240 are reasonably distributed in the plastic package layer 250.

Referring to fig. 13, fig. 13 is a distribution structure diagram of a first component 240a and a second component 240b provided in the present application. The component 240 wrapped in the molding layer 250 provided by the present application may include a first component 240a and a second component 240b, where the first component 240a is disposed in an area covered by an orthographic projection of the avoiding groove 252 on the first surface 211a, and the second component 240b is disposed in an area covered by an orthographic projection of the avoiding groove 252 on the first surface 211a. The first component 240a has a first thickness along a thickness perpendicular to the first surface 211a, and the second component 240b has a second thickness along a thickness perpendicular to the first surface 211a, the first thickness being less than the second thickness.

In this way, the component 240 having a small thickness is provided in the region corresponding to the relief groove 252, and the component 240 having a large thickness is provided in the region other than the region corresponding to the relief groove 252. So that the avoiding groove 252 does not affect the installation of the component 240, and thus the installation space of the component 240 is not reduced while the distance between the protection board assembly 200 and the battery body 100 is reduced.

On this basis, the connection strength between the protection plate assembly 200 and the battery body 100 is further improved. Referring to fig. 14, fig. 14 is a structural diagram of another protection board assembly 200 according to an embodiment of the present disclosure, in which the protection board assembly 200 includes a reinforcing protection layer 260, and the reinforcing protection layer 260 covers a side surface of the FPC board 212 away from the PCB 211 and encloses the FPC board 212, the PCB 211, the plastic package layer 250 and the positive post 110 of the battery body 100. One end of the FPC board, which is far away from the PCB board, penetrates through the reinforcing protective layer 260 for connecting with an external element. And a reinforcing protective layer 260 is attached to the battery body 100.

Therefore, the FPC board 212, the PCB board 211 and the plastic package layer 250 are wrapped by the reinforcing and protecting layer 260, which is beneficial to forming effective protection on the FPC board 212, the PCB board 211, the plastic package layer 250 and the component 240 on one hand; on the other hand, the connection strength between the protection plate assembly 200 and the battery body 100 can be increased by reinforcing the protection layer 260. Thereby preventing the protective plate assembly 200 from being broken from the battery body 100 during use, and being beneficial to prolonging the service life of the battery body 100 and the protective plate assembly 200.

In some embodiments, the reinforcing protective layer 260 may be Mylar (Mylar). The Mylar film has stable size, flatness and excellent tearing strength. And the Mylar film has better heat and cold resistance, moisture and water resistance, chemical corrosion resistance and electrical insulation performance. Therefore, the mylar film is used as the reinforcing protective layer 260, which is beneficial to improving the connection strength between the protective plate assembly 200 and the battery body 100, and the good heat resistance of the mylar film can adapt to the heat generated by the battery body 100 and the protective plate assembly 200 during working, so that the mylar film cannot be damaged due to high temperature, and the service life of the battery 14 can be prolonged.

The following describes a method for manufacturing the protection plate assembly 200 in detail with reference to the structure of the protection plate assembly 200. The manufacturing method includes steps S101 to S108 shown in fig. 15:

s101, manufacturing a PCB 211

Referring to fig. 16, fig. 16 is a structural diagram of a PCB 211 according to an embodiment of the present disclosure. The PCB 211 required for manufacturing the electronic device 10 is a printed circuit board 210, and the PCB 211 has a first surface 211a.

S102, arranging a plurality of components 240 on the PCB 211

Referring to fig. 17, fig. 17 is a structural diagram of a plurality of components 240 disposed on the first surface 211a of the PCB 211 according to the embodiment of the present disclosure. The component 240 is disposed on the first surface 211a of the PCB 211. Illustratively, the component 240 may be Mounted on the first Surface 211a of the PCB board 211 by Surface Mount Technology (SMT).

The component 240 includes a first component 240a and a second component 240b, and the thickness of the first component 240a is smaller than that of the second component 240b along a direction perpendicular to the first surface 211a.

S103, forming a plastic packaging layer 250 wrapping the component 240 on the first surface 211a of the PCB 211

Referring to fig. 18, fig. 18 is a structural diagram of a molding layer 250 formed on the first surface 211a according to the present application. The plastic-sealed layer 250 is provided with an avoiding groove 252 at a position corresponding to the first component 240a, and the avoiding groove 252 accommodates the liquid injection port 130 of the battery body 100, so that when the protection plate assembly 200 is fixed on the battery body 100, the distance between the protection plate assembly 200 and the battery body 100 is favorably reduced.

It should be noted that a plurality of first components 240a may be provided, and a plurality of first components 240a may be provided in the orthographic projection area formed on the first surface 211a by the avoiding groove 252, or only one first component 240a may be provided, which is not particularly limited in the present application.

S104, manufacturing the FPC board 212

Referring to fig. 19, fig. 19 is a structural diagram of an FPC board 212 according to an embodiment of the present application. An FPC board 212 required for the electronic device 10 is manufactured, and the FPC board 212 is a flexible circuit board 210. A positive electrode nickel plate 220 and a negative electrode nickel plate 230 are respectively welded on one side surface of the completed FPC board 212. Illustratively, both the positive electrode nickel plate 220 and the negative electrode nickel plate 230 may be soldered to the FPC board 212 by reflow soldering.

S105, welding the PCB 211 and the FPC 212

Referring to fig. 20, fig. 20 is a structural diagram of the FPC board 212 and the PCB board 211 according to the embodiment of the present disclosure after being soldered. The surface of the FPC board 212 away from the positive electrode nickel sheet 220 and the negative electrode nickel sheet 230 is soldered to the surface of the PCB board 211 away from the molding layer 250. For example, a plurality of solder joints may be formed between the PCB 211 and the FPC 212 by spot welding to achieve soldering therebetween.

S106, welding the negative nickel sheet 230 with the battery body 100

Referring to fig. 21, fig. 21 is a structural diagram illustrating welding of a negative nickel plate 230 of a protection plate assembly 200 and a battery body 100 according to an embodiment of the present disclosure. The negative electrode nickel plate 230 is welded to the negative electrode contact 120 of the battery body 100 by laser spot welding to electrically connect the negative electrode nickel plate 230 to the negative electrode contact 120 of the battery body 100. Then, the negative electrode nickel sheet 230 is bent, and the side of the plastic package layer 250 away from the first surface 211a is fixedly connected with the battery body 100, and meanwhile, the liquid injection port 130 of the battery body 100 extends into the avoiding groove 252 on the plastic package layer 250, so that the liquid injection port 130 is avoided through the avoiding groove 252.

Illustratively, the molding layer 250 and the battery body 100 may be fixed by adhesive through a back adhesive. The fixing is carried out in an adhesive mode, the process difficulty is low, and the production cost is favorably reduced.

S107, welding the positive nickel sheet 220 with the battery body 100

The positive post 110 of the battery body 100 is positioned at one side of the protective plate assembly 200, and the positive nickel plate 220 is welded to the positive post 110 of the battery body 100 by laser spot welding to achieve welding of the positive nickel plate 220 to the positive post 110 of the battery body 100, thereby forming the battery 14 shown in fig. 7.

Based on this, it is possible to achieve a fixed connection between the protection plate assembly 200 and the battery body 100, and the protection plate assembly 200 is electrically connected to the battery body 100 through the positive electrode nickel plate 220 and the negative electrode nickel plate 230. Compared with the related art, the protection board assembly 200 provided by the embodiment of the application has higher overall reliability, and the distance between the protection board assembly 200 and the end face of the battery body 100 is smaller, thereby being beneficial to saving the inner space of the shell of the electronic device 10.

S108, forming a reinforced protection layer 260

A reinforcing and protecting layer 260 is formed on the side of the FPC board 212 away from the PCB board 211, the reinforcing and protecting layer 260 wraps the FPC board 212, the PCB board 211, the molding layer 250 and the positive post 110 of the battery body 100, and the reinforcing and protecting layer 260 is fixed to the battery body 100 in an adhering manner, thereby forming the protecting layer assembly 200 shown in fig. 14.

In some embodiments, the reinforcing protection layer 260 may be formed by using a mylar tab, that is, the mylar tab is attached to the end faces of the protection plate assembly 200 and the battery body 100, so that the reinforcing protection layer 260 can be attached, adhered and fixed to the battery body 100 while wrapping the FPC board 212, the PCB 211, the plastic sealing layer 250 and the positive post 110 of the battery body 100, thereby improving the connection strength between the protection plate assembly 200 and the battery body 100.

It should be noted that, since the FPC board needs to be connected to an external component, when the reinforcing protection layer 260 covers the FPC board 212, one end of the FPC board 212, which is far away from the PCB 211, may penetrate through the reinforcing protection layer 260, so that the FPC board can be connected to the external component.

In another possible embodiment, please refer to fig. 22 and 23, fig. 22 is a structural diagram of another avoiding structure 251 of the protection plate assembly 200 according to an embodiment of the present application, and fig. 23 is a structural diagram of a connection between the protection plate assembly 200 and the battery body 100 according to fig. 22. The avoiding structure 251 may also be an avoiding hole 253, and the avoiding hole 253 penetrates through the plastic package layer 250 in a direction perpendicular to the first surface 211a. When the protection board assembly 200 is fixed to the battery body 100, the liquid inlet 130 of the battery body 100 extends into the avoiding hole 253 to form an avoidance, so that the distance between the protection board assembly 200 and the battery body 100 can be reduced.

Moreover, since the avoiding hole 253 penetrates through the plastic package layer 250, the avoiding hole 253 is not provided with any component 240 in the area covered by the orthographic projection on the first surface 211a, so that only the thickness of the liquid injection port 130 is formed between the PCB 211 and the battery body 100 in the orthographic projection area of the avoiding hole 253, and therefore, the distance between the PCB 211 and the battery body 100 can be further reduced, namely, the distance between the protection board assembly 200 and the battery body 100 is further reduced, and space saving is facilitated.

The avoiding hole 253 can be disposed in the edge region of the plastic package layer 250 as shown in fig. 23. Or may be disposed in the middle of the plastic sealing layer 250, please refer to fig. 24 and 25, fig. 24 is a structural diagram of the avoidance hole 253 disposed in the middle provided in the present application, and fig. 25 is a structural diagram of the connection between the protection plate assembly 200 and the battery body 100 provided in fig. 24, so as to adapt to battery bodies 100 with different structures, which is beneficial to improving the universality of the protection plate assembly 200.

Illustratively, the aforementioned escape hole 253 may be a circular hole, i.e., the escape hole 253 is circular along a section parallel to the first surface 211a. But may be a square hole, an elliptical hole, or a polygonal hole. The shape of the avoiding hole 253 may be determined according to the opening difficulty, and thus, the present application is not limited thereto.

In addition, when the avoidance hole 253 is manufactured, after the plastic package layer 250 is formed, the material of the plastic package layer 250 may be removed at a position corresponding to the injection port 130, so that the avoidance hole 253 structure may be formed. A protrusion structure with a corresponding shape may be provided in the mold when the molding layer 250 is formed. Such as a cylinder. After the injection molding is completed, the avoidance hole 253 with a circular cross section can be formed on the plastic packaging layer 250 at a position corresponding to the cylinder. Therefore, the present application is not particularly limited thereto.

Based on this, the other structures and manufacturing methods of the protection plate assembly 200 provided by the present example are the same as those of the previous examples, and therefore, a repeated description is not made.

Based on this, the protection board assembly 200 provided in the embodiment of the present application can accommodate the liquid injection port 130 on the battery body 100 through the avoiding structure 251 disposed on the plastic sealing layer 250, so as to reduce the distance between the protection board assembly 200 and the battery body 100, that is, the protection board assembly 200 has a smaller overall volume, when the protection board assembly 200 is installed inside the case shown in fig. 2, the space inside the case can be saved, and the saved space inside the case can be used to increase the capacity of the battery 14; in addition, the volume of the battery protection plate 200 is reduced, which is beneficial to the miniaturization of the whole electronic equipment.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A protection plate assembly for a battery, for electrically connecting with a battery body, the protection plate assembly for a battery comprising:

a circuit board having a first surface;

at least one component disposed on the first surface;

the plastic packaging layer covers the first surface and wraps the component; and an avoiding structure is arranged on the plastic packaging layer.

2. The protection plate assembly as claimed in claim 1, wherein the avoiding structure is used to accommodate a liquid injection port of the battery body.

3. The protection plate assembly as claimed in claim 1, wherein the relief structure is for receiving an electrode post of the battery body.

4. The protection plate assembly according to any one of claims 1 to 3, wherein the avoiding structure comprises an avoiding groove, and the avoiding groove is formed in a surface of the plastic package layer, which is far away from the first surface.

5. The protection board assembly according to claim 4, wherein the components comprise a first component and a second component, the first component is disposed in an area covered by an orthographic projection of the avoidance slot on the first surface, and the second component is disposed outside the area covered by the orthographic projection of the avoidance slot on the first surface;

the first component is a first thickness along a thickness perpendicular to the first surface, the second component is a second thickness along a thickness perpendicular to the first surface, and the first thickness is less than the second thickness.

6. The sheathing panel assembly according to claim 4, wherein said avoidance slot is circular, elliptical or polygonal in cross-sectional shape parallel to said first surface.

7. The protection plate assembly according to any one of claims 1 to 3, wherein the avoiding structure comprises an avoiding hole, and the avoiding hole penetrates through the plastic sealing layer.

8. The protection plate assembly of claim 7, wherein the relief hole is a circular hole, an elliptical hole, or a polygonal hole.

9. A protection plate assembly according to any one of claims 1 to 3, wherein the circuit board comprises:

the surface of the PCB facing the battery body is the first surface;

and the FPC board is welded on the surface of the PCB, which is far away from the plastic packaging layer.

10. The protection plate assembly as claimed in claim 9, further comprising a positive electrode nickel plate and a negative electrode nickel plate, both of which are soldered to a surface of the FPC board remote from the PCB board; the positive electrode nickel sheet is used for being electrically connected with the positive electrode of the battery body, and the negative electrode nickel sheet is used for being electrically connected with the negative electrode of the battery body.

11. The protective plate assembly of claim 10, wherein a portion of the negative nickel plate is attached to an inner wall of the relief structure.

12. The protective plate assembly as claimed in claim 10, wherein the portion of the negative nickel plate electrically connected to the negative electrode of the battery body is between the battery body and the plastic encapsulant.

13. The protection plate assembly according to any one of claims 1 to 3, further comprising:

the glue layer is arranged on the surface of one side, far away from the circuit board, of the plastic packaging layer and is used for being fixedly connected with the battery body.

14. The protection plate assembly according to any one of claims 1 to 3, further comprising:

and the reinforcing protective layer is attached to one side of the circuit board far away from the first surface, wraps the circuit board and the plastic packaging layer and is fixedly connected with the battery body.

15. The protection board assembly of any one of claims 1-3, wherein the component comprises at least one of a chip, a capacitor, and an inductor.

16. A battery, comprising:

the battery comprises a battery body, wherein a liquid injection port is formed in the end face of the battery body;

a protection plate assembly according to any one of claims 1 to 15, wherein the protection plate assembly is fixed to an end surface of the battery body, and the liquid inlet is provided in a relief structure of the protection plate assembly.

17. An electronic device, comprising:

a housing;

a battery according to claim 16, said battery being disposed within said housing.