CN219456740U - Circuit board assembly and electronic equipment - Google Patents

Abstract

The embodiment of the application provides a circuit board assembly and electronic equipment, wherein the circuit board assembly comprises a circuit board, a battery and a battery protection board, and the battery is positioned on the circuit board and is communicated with the circuit board; the battery protection board comprises a packaging body and an electric connection unit, the packaging body is positioned on the circuit board and is located at the side of the battery, and the electric connection unit is exposed on one surface of the packaging body, facing the circuit board, so that the packaging body and the circuit board are conducted. The circuit board assembly can reduce the process complexity and the manufacturing cost of the battery protection board in the circuit board assembly, and enhance the layout freedom degree of the battery protection board in the circuit board assembly.

Description

Circuit board assembly and electronic equipment

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a circuit board assembly and an electronic device.

Background

Along with the development of technology, smart watches with functions of sending and receiving short messages, detecting sleep, health degree and the like have been widely applied to daily life of people.

The smart watch is generally provided with a circuit board, and devices such as a battery, a battery protection board and the like are arranged on the circuit board. In order to realize the protection function of the battery, a battery protection board is usually connected to the outer side of the battery, so that the overcharge protection, the overdischarge protection, the overcurrent protection and the short-circuit protection of the battery are realized through the real-time monitoring of the battery protection board. At present, traditional battery protection board is the structure of soft or hard combination board generally, and battery protection board connects in the utmost point ear side of battery, when protecting the battery, can communicate battery and circuit board.

However, the arrangement of the soft and hard combined plate not only can lead to more complex manufacturing process of the battery protection plate and increase the manufacturing cost of the battery protection plate, but also can reduce the reliability of the battery protection plate.

Disclosure of Invention

The application provides a circuit board assembly and electronic equipment, can reduce the technology complexity and the manufacturing cost of battery protection board in the circuit board assembly, strengthen the overall arrangement degree of freedom of battery protection board in the circuit board assembly.

The first aspect of the embodiment of the application provides a circuit board assembly, which comprises a circuit board, a battery and a battery protection board, wherein the battery is positioned on the circuit board and is communicated with the circuit board; the battery protection board comprises a packaging body and an electric connection unit, the packaging body is positioned on the circuit board and is located at the side of the battery, and the electric connection unit is exposed on one surface of the packaging body, facing the circuit board, so that the packaging body and the circuit board are conducted.

According to the embodiment of the application, through the arrangement of the circuit board, the battery and the battery protection board in the circuit board assembly, as the battery is located on the circuit board and is conducted with the circuit board, the battery protection board comprises the packaging body and the electric connection unit, the electric connection unit is exposed on the surface of the packaging body, facing the circuit board, so that the packaging body and the circuit board are conducted, and the battery protection board can be conducted with the battery through the circuit board, so that the battery protection board can realize the functions of overcharge protection, overdischarge protection, overcurrent protection and short-circuit protection of the battery protection board, and meanwhile, the layout freedom degree of the battery protection board in the circuit board assembly can be enhanced, so that the layout of the battery protection board in the circuit board assembly is more open. In addition, due to the existence of the packaging body, the defects of the soft and hard combined plate of the traditional battery protection plate can be overcome, and the process complexity and the manufacturing cost of the battery protection plate are reduced. In addition, the packaging body is conducted with the circuit board through the electric connection unit, so that the number of flexible circuit boards in the circuit board assembly can be reduced, the process complexity of connection of the battery protection board is reduced, and the manufacturing cost of the circuit board assembly is further reduced.

In some alternative embodiments, the package body includes a carrier, an electronic component, and a packaging colloid, the electrical connection unit is disposed on a side of the carrier facing the circuit board, the electronic component is disposed on a side of the carrier away from the circuit board, and the packaging colloid is packaged outside the electronic component.

The electronic component can be protected by the packaging colloid when the interconnection conduction between the packaging body and the circuit board is realized and the packaging colloid is packaged outside the electronic component, so that the reliability of the circuit protection board is enhanced.

In some alternative embodiments, the electrical connection unit includes a plurality of electrical connection parts uniformly distributed on the package body to conduct the package body and the circuit board, thereby achieving interconnection and conduction of the battery protection board and the circuit board through the plurality of electrical connection parts.

In some alternative embodiments, the circuit board is provided with a conducting part, and the electric connection part is arranged opposite to the conducting part and is conducted with the conducting part, so that the battery protection board and the circuit board are interconnected and conducted.

In some alternative embodiments, the electrical connection is a solder ball or an electrode contact. Thus, the structure of the electric connection part and the battery protection plate can be diversified while the interconnection and the conduction of the battery protection plate and the circuit board are realized.

In some optional embodiments, the packaging body is configured to monitor the voltage and the charge-discharge current of the battery and control the on-off of the current loop of the battery, so that when the packaging body monitors that the voltage and the charge-discharge current of the battery exceed the safety threshold, the packaging body can control the disconnection of the current loop of the battery, and the functions of overcharge protection, overdischarge protection, overcurrent protection and short-circuit protection of the battery are realized.

In some alternative embodiments, the battery protection plate is spaced from the battery to reduce heat transfer from the battery protection plate to the battery.

In some alternative embodiments, the circuit board assembly further includes an electrical connection assembly, the outer surface of the battery having a positive electrode and a negative electrode, the electrical connection assembly being connected between the positive electrode and the circuit board and between the negative electrode and the circuit board to conduct the battery and the circuit board.

Through the arrangement of the electric connection assembly, the battery and the circuit board can be directly interconnected and conducted, so that the circuit board can conduct the battery protection board and the battery, and the battery protection board has the functions of overcharge protection, overdischarge protection, overcurrent protection and short-circuit protection for the battery.

In some alternative embodiments, the battery has a metal case and an electrical connection protrusion on a peripheral outer wall of the metal case and connected with the metal case in an insulating manner to form a positive electrode; the outer surface of the metal shell forms the negative electrode.

In this way, the arrangement of the negative electrode formed on the outer surface of the metal shell can enhance the degree of freedom of the connection position of the electric connection assembly with the battery on the circuit board, so that the layout of the electric connection assembly in the circuit board assembly is more open.

In some alternative embodiments, the electrical connection assembly includes a first electrical connector connected between the positive electrode and the circuit board and a second electrical connector connected between the negative electrode and the circuit board.

Therefore, the positive electrode of the battery can be conducted with the circuit board through the first electric connecting piece, and the negative electrode of the battery can be conducted with the circuit board through the second electric connecting piece, so that the interconnection and conduction between the battery and the circuit board are realized.

In some alternative embodiments, one end of the first electrical connector is fixedly connected with the positive electrode, and the other end is fixedly connected with the circuit board;

one end of the second electric connecting piece is fixedly connected with the negative electrode, and the other end of the second electric connecting piece is fixedly connected with the circuit board.

Thus, the connection reliability and stability between the circuit board and the battery can be enhanced while the interconnection and conduction between the battery and the circuit board are realized.

In some optional embodiments, the first electrical connector and the second electrical connector are both metal connection pieces, and the metal connection pieces are of a bending structure, so that the metal characteristics of the metal connection pieces are utilized to realize interconnection and conduction between the electrical connection assembly and the battery and the circuit board, and meanwhile, the metal connection pieces can be conveniently fixedly connected between the battery and the circuit board through the arrangement of the bending structure.

In some alternative embodiments, the first electrical connector is removably connected between the positive electrode and the circuit board, and/or,

the second electric connector is detachably connected between the negative electrode and the circuit board.

Therefore, the first electric connecting piece and the second electric connecting piece can realize interconnection and conduction of the battery and the circuit board, and simultaneously can facilitate disassembly and assembly of the battery on the circuit board.

In some alternative embodiments, one end of the first electrical connector is fixedly connected to the circuit board and is conducted with the circuit board, and the other end of the first electrical connector is elastically abutted to the positive electrode;

one end of the second electric connecting piece is fixedly connected to the circuit board and is communicated with the circuit board, and the other end of the second electric connecting piece is elastically abutted to the negative electrode.

Therefore, the first electric connecting piece and the second electric connecting piece can be convenient for the spring connection of the circuit board and the battery, and the quick connection of the battery on the circuit board can be realized while the interconnection and the conduction of the battery and the circuit board are realized.

In some alternative embodiments, the first electrical connector and the second electrical connector are metal spring plates, and the metal spring plates are welded on the circuit board, so that the metal spring plates are fixedly connected on the circuit board and can be connected with the circuit board in a conducting manner, and meanwhile the circuit board and the battery can be connected in a spring manner.

In some alternative embodiments, the first electrical connector and the second electrical connector each comprise a first plug and a second plug that are plugged with each other, the first plug is fixedly connected to the circuit board and is conducted with the circuit board, and the second plug is fixedly connected and is conducted with the positive electrode or the negative electrode.

Through the setting of first plug and second plug like this, can be convenient for through the grafting of circuit board and battery, realize the interconnection and the switch-on of battery and circuit board, can also strengthen reliability and the stability that circuit board and battery are connected.

In some alternative embodiments, the first plug is soldered to the circuit board and the second plug is soldered to the positive or negative electrode so that the positive and negative electrodes of the battery can be electrically connected to the circuit board when the first plug is plugged into the second plug.

A second aspect of the embodiments of the present application provides an electronic device, including a housing and a circuit board assembly as defined in any one of the preceding claims, where the housing has a housing cavity therein, and the circuit board assembly is disposed in the housing cavity.

According to the embodiment of the application, through the arrangement of the circuit board assembly in the electronic equipment, the overcharge protection, the overdischarge protection, the overcurrent protection and the short-circuit protection functions of the battery are realized through the battery protection board, meanwhile, the layout freedom degree of the battery protection board in the circuit board assembly can be enhanced, and the process complexity and the manufacturing cost of the battery protection board are reduced.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 2 is a schematic structural view of a circuit board assembly provided in the related art;

FIG. 3 is a schematic view showing the connection between the battery protection plate and the battery in FIG. 2;

fig. 4 is a schematic view showing connection of another battery protection plate and a battery provided in the related art;

FIG. 5 is an enlarged schematic view of portion A of FIG. 4;

fig. 6 is a schematic structural diagram of a circuit board assembly according to an embodiment of the present disclosure;

FIG. 7 is an enlarged schematic view of portion B of FIG. 6;

FIG. 8 is a schematic diagram of the connection of a battery protection plate to a circuit board;

fig. 9 is a schematic structural diagram of another circuit board assembly according to an embodiment of the present disclosure;

FIG. 10 is an enlarged schematic view of FIG. 9 at section C;

fig. 11 is a schematic structural diagram of still another circuit board assembly according to an embodiment of the present disclosure;

fig. 12 is an enlarged schematic view of fig. 11 at section D.

Reference numerals illustrate:

100-an electronic device; 1-a housing; 2-a display screen; 3-a circuit board assembly; 31-a circuit board; 311-conducting part;

32-battery; 321-positive electrode; 322-negative electrode; 323-a metal shell; 33-a battery protection plate; 331-packaging the body; 3311—a carrier plate; 3312-electronic component; 3313-encapsulant; 332-electrical connection; 333-insulator; 334-hard plate; 335-soft board;

34-an electrical connection assembly; 341-a first electrical connection; 342-a second electrical connection; 343-a first plug; 344-a second plug; 35-a second flexible circuit board; 36-a third flexible circuit board; 37-sheet metal;

39-an electronic device; 391-key; 392-a speaker; 393-sensor;

4-fixing band.

Detailed Description

The terminology used in the description section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

The embodiment of the application provides an electronic device, which can be a mobile phone, a wearable electronic device or other electronic devices with lithium batteries. The wearable electronic device may be a wristwatch, a bracelet, an earphone, or other electronic device that may be worn on the body of the user.

According to the different structures of the wearable electronic equipment, the wearable electronic equipment is correspondingly worn on the same or different wearing parts of the user. For example, when the wearable electronic device is a wristwatch or a bracelet, the wearing parts corresponding to the wristwatch and the bracelet are both wrists of the user. For example, when the wearable electronic device is an earphone, the wearing part corresponding to the earphone is an ear of the user. In the present application, the structure of the electronic device is not further limited.

Fig. 1 illustrates a schematic structure of a wearable electronic device.

Referring to fig. 1, an electronic device 100 may include a housing 1, and the housing 1 may have a housing cavity (not shown) therein, where the housing cavity may be used to house a circuit board 31, a battery (not shown), and some electronic components (not shown) of the electronic device 100. The electronics may include, but are not limited to, keys, speakers, microphones, and sensors for electronic device 100. Wherein sensor 393 may include, but is not limited to, a gyroscopic sensor. Where electronic device 100 has measurement functionality to measure human health characteristics such as heart rate, respiration rate, blood oxygen, etc., sensor 393 may also include a photosensor to detect a physiological signal of the heart vessel of the human.

The circuit board 31 may be referred to as a motherboard of the electronic device 100, and the circuit board 31 typically carries a processing module, a memory module, a power management module, a charge management module, and the like. The battery 32 may be disposed on the circuit board 31 and interconnected with and electrically connected to the circuit board 31, so as to meet the electrical interconnection requirement between the battery 32 and the circuit board 31 in the electronic device 100.

The setting of acceping the chamber is through the application, when realizing the assembly of circuit board 31, battery 32 and electron device 39 in casing 1, can also hide circuit board 31, battery 32 and electron device in casing 1, the reliability of reinforcing circuit board 31, battery 32 and electron device 39 and the aesthetic property of electronic equipment 100.

In fig. 1, a circular housing 1 is illustrated, and the shape of the housing 1 varies depending on the electronic apparatus 100. When the electronic device 100 is a wristwatch, the case 1 may be square, oval, or other shape in addition to the circular shape. When the electronic device 100 is a mobile phone, the housing 1 may be rectangular, square, or the like.

With continued reference to fig. 1, in some embodiments, when the electronic device 100 has a display function, the electronic device 100 may further include a display screen 2, where the display screen 2 may be used to display information entered by a user or provided to the user as well as various menus of the electronic device 100, and may also receive user inputs. The display screen 2 is embedded on the housing 1 and connected to the peripheral edge of the housing 1 to realize the assembly of the display screen 2 on the housing 1. The display screen 2 is electrically connected to the circuit board 31 so that the display of the display screen 2 is controlled by the circuit board 31. The display 2, the housing 1, and the circuit board 31 may together constitute a body of the electronic device 100. The side of the machine body provided with the display screen 2 is the front side of the electronic device 100, and the opposite side of the machine body away from the display screen 2 is the back side of the electronic device 100.

With continued reference to fig. 1, in some embodiments, the electronic device 100 may further include a strap 4, where the strap 4 may be detachably connected to opposite sides of the body so that the body may be secured to a wearing portion of a user (e.g., a wrist of the user) by the strap 4. The securing strap 4 may include, but is not limited to, a watchband. The structure of the fixing band 4 and its connection to the body can be referred to the related description in the wristwatch or the bracelet of the related art, and is not further limited herein.

The structure of the electronic device 100 is further described below using a wristwatch as an example.

Fig. 2 is a schematic structural view of a circuit board assembly in the related art.

Referring to fig. 2, the circuit board assembly 3a may include a circuit board 31, a battery 32, a battery protection board 33a, keys 391, a speaker 392, a microphone and a sensor 393, and other electronic devices 39. The battery 32 may be a lithium battery, and the battery 32, the key 391, the speaker 392, the microphone and the sensor 393 may be disposed on the circuit board 31, and together with the circuit board 31, form a circuit board assembly 3a disposed in the housing cavity of the electronic device 100. The circuit board assembly 3a further includes a first flexible circuit board (not illustrated in the drawings), which may be referred to as a main flexible circuit board (Flexible Printed Circuit, FPC) in the electronic device 100, abbreviated as main PFC. The first flexible circuit board may interconnect and conduct electronics 39 such as keys 391, speaker 392, microphone and sensor 393, etc. to the circuit board 31 via its own plurality of connection branches.

Fig. 3 is a schematic view illustrating connection of the battery protection plate and the battery in fig. 2.

Referring to fig. 3, the battery 32 generally includes a metal case 323, a battery cell disposed inside the metal case 323, and at least one electrical connection protrusion penetrating on a circumferential outer wall of the metal case 323 and electrically connected with the metal case 323 through an insulating member 333 to form a positive electrode 321. The outer surface of the metal can 323 forms the negative electrode 322. Wherein, the insulating member 333 may be insulating foam. The side of the battery 32 where the positive electrode 321 and the negative electrode 322 are provided may be referred to as the tab side of the battery cell.

With continued reference to fig. 3, the battery protection plate 33a generally has a structure of a rigid-flex board. The battery protection plate 33 may include two hard plates 334 and one soft plate 335, the two hard plates 334 being disposed opposite to each other, a first end of the soft plate 335 being interposed between the two hard plates 334, and a second end of the soft plate 335 extending to the outside of the hard plates 334. The battery protection plate 33a has one end of a hard plate 334 connected to the tab side of the battery 32 and electrically connected to the positive electrode 321 and the negative electrode 322 of the battery 32, and a second end of a soft plate 335 may be wound along the peripheral side edge of the battery 32 and communicate with one of the connection branches of the first flexible circuit board (as shown in fig. 2), thereby satisfying the electrical interconnection requirement of the battery protection plate 33a and the circuit board 31.

The battery protection board 33a can monitor the voltage and the charge-discharge current of the battery 32 in real time, so that when the battery protection board 33a monitors that the voltage and the charge-discharge current of the battery 32 exceed the safety threshold, the electronic element (such as a field effect transistor) in the battery protection board 33a can control the disconnection of the current loop of the battery 32, thereby realizing overcharge protection, overdischarge protection, overcurrent protection and short-circuit protection of the battery 32. The control of the battery protection plate 33a to switch on and off the current loop of the battery 32 may refer to the related description in the prior art, and will not be further described herein.

Referring to fig. 3, since the hard plate 334 and the soft plate 335 are integrally formed, the manufacturing process of the battery protection plate 33a is complicated, resulting in high manufacturing costs of the battery protection plate 33 a. Also, as shown in fig. 2, the electronic element (not shown in the drawing) of the battery protection plate 33a is exposed to the outside of the battery protection plate 33a, which affects the reliability of the battery protection plate 33a, so that the reliability of the battery protection plate 33a is low.

The charge rate of the battery 32 is also different for batteries 32 of different charge powers. The design of the soft plate 335 in the battery protection plate 33a needs to consider not only the diversity of the charging power of the battery 32, but also the layout of the battery 32 and some of the above-mentioned electronic devices 39 (such as the keys 391, the speaker 392, the microphone and the sensor 393) on the circuit board 31, which may lead to a lack of normalization of the battery protection plate 33 a. As the charging power of the battery 32 and the layout of the electronic device 39 on the circuit board 31 change, the structure of the soft plate 335 in the battery protection plate 33a also changes, which increases the manufacturing cost of the battery protection plate 33a and the electronic apparatus 100.

Fig. 4 is a schematic view showing connection of another battery protection plate and a battery provided in the related art, and fig. 5 is an enlarged schematic view of a portion a of fig. 4 to facilitate understanding of assembly of such a battery protection plate on a battery.

Referring to fig. 4 and 5, the battery protection plate 33b adopts a system in package (System in a Package, siP) structure. At this time, the battery protection plate 33b may be connected to the tab side of the battery 32 as a single device. Specifically, one end of the battery protection plate 33b may be connected to the positive electrode 321 of the battery 32 through the second flexible circuit board 35, and the other end may be connected to the negative electrode 322 of the battery 32 through the metal sheet 37, so as to achieve interconnection and conduction of the battery protection plate 33b and the battery 32. Also, the battery protection board 33b may be directly connected to the circuit board 31 by soldering through the third flexible circuit board 36 or connected to one of the connection branches of the first flexible circuit board through a connector, so that the battery protection board 33b is interconnected and conducted with the circuit board 31.

Due to the arrangement of the system-in-package structure of the battery protection board 33b, the arrangement of the soft board 335 is not needed, and the electronic components can be prevented from being exposed outside the battery protection board 33b, so that the defects of the soft and hard combined board are overcome, the process complexity and the manufacturing cost of the battery protection board 33b are reduced, the reliability of the battery protection board 33b is enhanced, the battery protection board 33b has certain normalization, and the arrangement of the electronic components 39 on the circuit board 31 is not limited, so that the battery 32 with the same charging power can be better matched through one battery protection board 33 b. However, the battery protection board 33b still needs to be connected to the third flexible circuit board 36 by the surface mount technology (Surface Mounted Technology, SMT), which also results in a complicated connection process of the battery protection board 33b, so that the battery protection board 33b and the circuit board assembly 3a have high manufacturing costs.

Therefore, the embodiment of the application provides a circuit board assembly, which can replace the circuit board assembly in the related art to be applied to electronic equipment by improving the structure of the circuit board assembly, can reduce the process complexity and the manufacturing cost of the battery protection board in the circuit board assembly while realizing the functions of the electronic equipment, and enhance the layout freedom of the battery protection board in the circuit board assembly.

The structure of the circuit board assembly of the present application is further described below with reference to the drawings and embodiments.

Fig. 6 illustrates a schematic structure of a circuit board assembly of the present application.

Referring to fig. 6, the circuit board assembly 3 includes a circuit board 31, a battery 32, and a battery protection board 33, wherein the battery 32 is located on the circuit board 31 and is in conduction with the circuit board 31, thereby satisfying the interconnection requirement of the battery 32 and the circuit board 31 in the electronic device 100.

Fig. 7 is an enlarged view of the portion B of fig. 6, and fig. 8 is a view showing the connection of the battery protection plate to the circuit board.

Referring to fig. 7 and 8, the battery protection plate 33 includes a package body 331 and an electrical connection unit (not illustrated in the drawings), the package body 331 being located on the circuit board 31 at a side of the battery 32. As shown in fig. 7, the electrical connection unit is exposed on a surface of the package body 331 facing the circuit board 31 to conduct the package body 331 and the circuit board 31. Since the battery 32 is conducted with the circuit board 31, when the package body 331 is conducted with the circuit board 31 through the electrical connection unit, the battery protection board 33 and the circuit board 31 can be interconnected and conducted, and when the electrical interconnection requirement of the battery protection board 33 and the circuit board 31 in the electronic device 100 is met, the battery protection board 33 can be conducted with the battery 32 through the circuit board 31, so that the battery protection board 33 can realize the functions of overcharge protection, overdischarge protection, overcurrent protection and short-circuit protection of the battery 32.

Compared with the arrangement of the battery protection plate 33a connected to the tab side of the battery 32 in the related art, since the battery protection plate 33 is located on the side of the battery 32 on the circuit board 31 and is directly conducted with the circuit board 31, the battery protection plate 33 can be disposed not only on the tab side of the battery 32 but also on other positions of the peripheral side edge of the battery 32 on the circuit board 31. Therefore, the present application can enhance the degree of freedom of layout of the battery protection plate 33 in the circuit board assembly 3, so that the layout of the battery protection plate 33 in the circuit board assembly 3 is more open.

Moreover, due to the existence of the package body 331, the soft plate 335 is not required to be arranged in the battery protection plate 33, and due to the existence of the package body 331, the electronic elements (not shown in the figure) in the battery protection plate 33 can be prevented from being exposed outside the battery protection plate 33, the defect of the soft and hard combination plate of the traditional battery protection plate 33a can be overcome, the process complexity and the manufacturing cost of the battery protection plate 33 are reduced, the reliability of the battery protection plate 33 is enhanced, and different charging powers of the battery 32 are better matched.

It should be noted that, the package body 331 and the electrical connection unit may form the battery protection board 33 together, and the battery protection board 33 may form a system-in-package structure due to the package body 331.

In addition, the package body 331 of the present application is electrically connected to the circuit board 31 through the electrical connection unit, and compared with the connection between the battery protection board 33b and the circuit board 31 through the third flexible circuit board 36, the third flexible circuit board 36 can be omitted, the number of flexible circuit boards 31 in the circuit board assembly 3 can be reduced, the process complexity of connection of the battery protection board 33 can be reduced, and the manufacturing cost of the battery protection board 33 and the circuit board assembly 3 can be further reduced.

The package body 331 is configured to monitor the voltage and the charge-discharge current of the battery 32, and control the on-off of the current loop of the battery 32, so that when the package body 331 monitors that the voltage and the charge-discharge current of the battery 32 exceed the safety threshold, the package body 331 can control the disconnection of the current loop of the battery 32, thereby realizing the functions of overcharge protection, overdischarge protection, overcurrent protection and short-circuit protection of the battery 32.

Note that, the package body 331 may be understood as a structure of the power-off connection unit in the battery protection plate 33. The structure of the package body 331 will be further described with reference to the accompanying drawings.

With continued reference to fig. 8, in some embodiments, the electrical connection unit may include one electrical connection 332. In other embodiments, the electrical connection unit may include a plurality of electrical connection portions 332, where the electrical connection portions 332 are uniformly distributed on the package body 331 to conduct the package body 331 and the circuit board 31, so that the reliability of the interconnection between the battery protection board 33 and the circuit board 31 can be enhanced compared to the design of one electrical connection portion 332 in the electrical connection unit while the interconnection and the conduction between the battery protection board 33 and the circuit board 31 are achieved through the plurality of electrical connection portions 332.

It should be noted that, the package body 331 may be provided with one or more electrical connection units, and the number of the electrical connection units is not further limited in this application.

As shown in fig. 8, the circuit board 31 has a conducting portion 311 thereon, and an electrical connection portion 332 is disposed opposite to the conducting portion 311 and is conducted with the conducting portion 311, so that the battery protection board 33 and the circuit board 31 can be interconnected and conducted by the conduction of the electrical connection portion 332 and the conducting portion 311, and the requirement for the electrical interconnection of the battery protection board 33 and the circuit board 31 in the electronic device 100 can be satisfied.

The electrical connection portion 332 may be electrically connected to the conductive portion 311 by soldering or other electrical connection method. In this application, the battery protection board 33 can be stably connected to the circuit board 31 by welding while ensuring stable conduction between the electric connection portion 332 and the conduction portion 311.

The electrical connection portion 332 may be a solder ball, an electrode contact, or other connection structure capable of conducting with the conducting portion 311. When the electrical connection portion 332 is a solder Ball, the battery protection plate 33 may employ a Ball Grid Array (BGA) structure. When the electrical connection portion 332 is an electrode contact, the battery protection plate 33 may employ a contact array (LGA) structure. This enables the structure of the electric connection portion 332 and the battery protection plate 33 to be more diversified while achieving interconnection and conduction of the battery protection plate 33 and the circuit board 31. In the present application, the kind of the electrical connection portion 332 is not further limited.

With continued reference to fig. 8, the package body 331 includes a carrier 3311, an electronic component 3312 and a molding compound 3313, the electrical connection unit is disposed on a side of the carrier 3311 facing the circuit board 31, and the electronic device 39 is disposed on a side of the carrier 3311 away from the circuit board 31, so as to implement interconnection and conduction between the package body 331 and the circuit board 31.

The encapsulant 3313 is encapsulated outside the electronic component 3312. By way of example, the electronic components 3312 may include, but are not limited to, field effect transistors, resistors, capacitors, and the like. The electronic component 3312 can be protected by the encapsulant 3313 in this way to avoid the electronic component 3312 from being exposed to the outside of the battery protection plate 33, thereby enhancing the reliability of the circuit protection plate 33.

As shown in fig. 7, there is a space between the battery protection plate 33 and the battery 32, so that a separate design of the battery protection plate 33 and the battery 32 on the circuit board 31 is achieved to reduce heat transfer of the battery protection plate 33 to the battery 32.

Note that the distance between the battery protection plate 33 and the battery 32 depends on the structural size of the circuit board 31 and the arrangement position of the battery protection plate 33 on the circuit board 31. In application, the space between the battery protection plate 33 and the battery 32 can be adjusted by those skilled in the art according to the structural size of the circuit board 31 and the arrangement position of the battery protection plate 33 on the circuit board 31, and in this application, the space between the battery protection plate 33 and the battery 32 is not further limited.

As shown in fig. 7, the circuit board assembly 3 may further include an electrical connection assembly 34, the outer surface of the battery 32 having a positive electrode 321 and a negative electrode 322, the electrical connection assembly 34 being connected between the positive electrode 321 and the circuit board 31 and between the negative electrode 322 and the circuit board 31 to conduct the battery 32 and the circuit board 31, so that the battery 32 can be directly interconnected and conducted with the circuit board 31 through the electrical connection assembly 34, thereby conducting the battery protection plate 33 with the battery 32 through the circuit board 31, so as to realize the overcharge protection, the overdischarge protection, the overcurrent protection, and the short-circuit protection functions of the battery protection plate 33 to the battery 32.

As described above with reference to fig. 7, the battery 32 has a metal case 323 and an electrical connection protrusion on the outer peripheral wall of the metal case 323 and connected with the metal case 323 in an insulating manner to form the positive electrode 321. When the electrical connection member 34 is connected to the electrical connection protrusion, the electrical connection member 34 can be electrically connected to the positive electrode 321 of the battery 32.

The outer surface of the metal can 323 forms the negative electrode 322. In this way, the outer surfaces of the metal shells 323 are the cathodes 322, so that the structure connected with the cathodes 322 in the electric connection assembly 34 can be arranged on the circuit board 31 at any position on the outer surfaces of the metal shells 323, the degree of freedom of the connection position of the electric connection assembly 34 with the battery 32 on the circuit board 31 can be enhanced, and the layout of the electric connection assembly 34 in the circuit board assembly 3 is more open.

Wherein the metal shell 323 may include, but is not limited to, a metal shell formed of steel or other metal. The battery 32 composed of a steel can may be referred to as a steel can battery. The structure of the battery 32 and the formation of the positive electrode 321 and the negative electrode 322 may refer to the structure of a steel-shell battery in the related art, and will not be further described herein.

With continued reference to fig. 6, the electrical connection assembly 34 includes a first electrical connector 341 and a second electrical connector 342, wherein the first electrical connector 341 is connected between the positive electrode 321 and the circuit board 31 so that the positive electrode 321 of the battery 32 can be electrically conducted with the circuit board 31 through the first electrical connector 341. The second electrical connector 342 is connected between the negative electrode 322 and the circuit board 31 so that the negative electrode 322 of the battery 32 can be conducted with the circuit board 31 through the second electrical connector 342. Thus, by providing the first electrical connector 341 and the second electrical connector 342, interconnection and conduction between the battery 32 and the circuit board 31 can be achieved.

It should be noted that the second electrical connector 342 may be provided at any position of the peripheral edge of the metal case 323, so that the degree of freedom of the position of connection of the second electrical connector 342 with the battery 32 on the circuit board 31 is higher.

As shown in fig. 7, in some embodiments, one end of the first electrical connector 341 may be fixedly connected with the positive electrode 321, and the other end may be fixedly connected with the circuit board 31, such that the first electrical connector 341 can be fixedly connected between the positive electrode 321 and the circuit board 31. The two ends of the first electrical connector 341 may be respectively fixed on the positive electrode 321 and the circuit board 31 by welding or by fixedly connecting with conductive adhesive. One end of the second electrical connector 342 may be fixedly connected with the negative electrode 322, and the other end may be fixedly connected with the circuit board 31, so that the second electrical connector 342 may be fixedly connected between the negative electrode 322 and the circuit board 31. The two ends of the second electrical connector 342 may be respectively fixed to the negative and the circuit board 31 by welding or by a fixed connection such as conductive adhesive.

Thus, while the interconnection and conduction between the battery 32 and the circuit board 31 are realized, the reliability and stability of the connection between the circuit board 31 and the battery 32 can be enhanced, since the first electrical connector 341 is fixedly connected between the positive electrode 321 and the circuit board 31 and the second electrical connector 342 is fixedly connected between the positive electrode 321 and the circuit board 31.

Referring to fig. 7, the first electrical connector 341 and the second electrical connector 342 are metal connection pieces, wherein the metal connection pieces are of a bending structure. By way of example, the metal connecting tab may include, but is not limited to, an "L" shaped bent structure. In this way, the metal characteristic of the metal connecting sheet is utilized to realize interconnection and conduction between the electric connecting assembly 34 and the battery 32 and the circuit board 31, and the metal connecting sheet can be conveniently connected between the battery 32 and the circuit board 31 and fixedly connected with the battery 32 and the circuit board 31 respectively through the arrangement of the bending structure of the metal connecting sheet.

Fig. 9 is a schematic structural view of another circuit board assembly of the present application, and fig. 10 is an enlarged schematic view of fig. 9 at a portion C.

As shown with reference to fig. 9 and 10, in some embodiments, the first electrical connector 341 may also be detachably connected between the positive electrode 321 and the circuit board 31, such that the first electrical connector 341 is detachably connected between the battery 32 and the circuit board 31. Alternatively, in some embodiments, the second electrical connector 342 may also be detachably connected between the negative electrode 322 and the circuit board 31, such that the second electrical connector 342 is detachably connected between the battery 32 and the circuit board 31. Alternatively, in some embodiments, the first electrical connector 341 may also be detachably connected between the positive electrode 321 and the circuit board 31, while the second electrical connector 342 may also be detachably connected between the negative electrode 322 and the circuit board 31. Thus, the first electrical connector 341 and the second electrical connector 342 can interconnect and conduct the battery 32 and the circuit board 31, and simultaneously facilitate the disassembly and assembly of the battery 32 on the circuit board 31.

Referring to fig. 10, in some embodiments, one end of the first electrical connector 341 may be fixedly connected to the circuit board 31 and electrically connected to the circuit board 31, and the other end may be elastically abutted to the positive electrode 321, so that the first electrical connector 341 is elastically abutted to the positive electrode 321 of the battery 32 while being electrically connected to the circuit board 31. One end of the second electrical connector 342 may be fixedly connected to the circuit board 31 and electrically connected to the circuit board 31, and the other end may be elastically abutted to the negative electrode 322, so that the second electrical connector 342 is elastically abutted to the negative electrode 322 of the battery 32 while electrically connected to the circuit board 31.

In this way, the first electrical connector 341 and the second electrical connector 342 can facilitate the spring connection between the circuit board 31 and the battery 32, so that the battery 32 and the circuit board 31 can be interconnected and conducted, and meanwhile, compared with the mode that the first electrical connector 341 and the second electrical connector 342 are welded between the battery 32 and the circuit board 31, the quick connection of the battery 32 on the circuit board 31 can be realized.

As shown in fig. 10, the first electrical connector 341 and the second electrical connector 342 are metal spring plates, and the metal spring plates are welded on the circuit board 31, so as to ensure that the metal spring plates are fixedly connected on the circuit board 31, and can be abutted on the positive electrode 321 and the negative electrode 322 of the battery 32 when being conducted with the circuit board 31, so that the spring connection between the circuit board 31 and the battery 32 is realized.

Alternatively, in some embodiments, the metal spring may be further fixed on the circuit board 31 by conductive adhesive or other manners, and is in conduction with the circuit board 31. In the present application, the fastening manner of the metal spring and the circuit board 31 is not further limited.

The structure of the circuit board assembly 3 of the present application will be further described below by taking the case that the metal spring is soldered to the circuit board 31 as an example.

One end of the metal elastic sheet may be an elastic bending section, and an end surface of the elastic bending section is elastically abutted on the positive electrode 321 or the negative electrode 322 of the battery 32, and the other end of the metal elastic sheet may be bent towards one side of the circuit board 31, parallel to the board surface of the circuit board 31, and welded with the circuit board 31, so that the circuit board 31 is elastically connected with the battery 32 through the metal elastic sheet.

Alternatively, in some embodiments, one end of the first electrical connector 341 may be elastically abutted to the circuit board 31, and the other end is fixedly connected to the positive electrode 321 of the battery 32. One end of the second electrical connector 342 may be elastically abutted to the circuit board 31, and the other end is fixedly connected to the negative electrode 322 of the battery 32. In this application, the object of elastic abutment of the first electrical connector 341 and the second electrical connector 342 is not further limited.

Fig. 11 is a schematic structural view of still another circuit board assembly of the present application, and fig. 12 is an enlarged schematic view of fig. 11 at a portion D.

Referring to fig. 11 and 12, in some embodiments, the first electrical connector 341 and the second electrical connector 342 may each include a first plug 343 and a second plug 344 that are plugged into each other, where the first plug 343 may be fixedly connected to the circuit board 31 and electrically connected to the circuit board 31. The second plug 344 may be fixedly connected to and conducted with the positive electrode 321 or the negative electrode 322. One of the first plug 343 and the second plug 344 may be a male plug, and the other of the first plug 343 and the second plug 344 may be a female plug. Thus, by the arrangement of the first plug 343 and the second plug 344, the connection between the battery 32 and the circuit board 31 can be realized conveniently by plugging the circuit board 31 and the battery 32, and the reliability and stability of the connection between the circuit board 31 and the battery 32 can be enhanced.

The first plug 343 is soldered to the circuit board 31, and the second plug 344 is soldered to the positive electrode 321 or the negative electrode 322. The first plug 343 may be soldered to the circuit board 31 by SMT techniques, thereby achieving a secure connection of the first plug 343 to the circuit board 31. The second plug 344 may be fixedly connected to the positive electrode 321 or the negative electrode 322 by welding or the like, so as to realize the fixation of the second plug 344 to the positive electrode 321 or the negative electrode 322. Thus, when the first plug 343 is plugged into the second plug 344, the positive electrode 321 and the negative electrode 322 of the battery 32 can be conducted with the circuit board 31, so that the battery 32 can be electrically interconnected with the circuit board 31 in a plugging manner.

On the basis of the above, the electronic device 100 according to the embodiment of the present application includes the housing 1 and the circuit board assembly 3 as described above, the housing 1 has a housing cavity therein, and the circuit board assembly 3 may be disposed in the housing cavity instead of the circuit board assembly 3a in the related art. Through the arrangement of the circuit board assembly 3 in the electronic device 100, the embodiment of the application can enhance the layout freedom degree of the battery protection board 33 in the circuit board assembly 3 and reduce the process complexity and the manufacturing cost of the battery protection board 33 while realizing the functions of overcharge protection, overdischarge protection, overcurrent protection and short-circuit protection of the battery 32 through the battery protection board 33.

The circuit board assembly 3 may further include electronic devices 39 such as keys 391, speakers 392, microphones and sensors 393 carried on the circuit board 31, in addition to the circuit board 31, the battery 32 and the battery protection board 33, wherein the connection of these electronic devices 39 may be described in the related art, and further description thereof is omitted herein.

It should be noted that, the electronic device 100 may further include structures such as the display screen 2 and the fixing strap 4, and the fixing of the display screen 2 and the fixing strap 4 in the electronic device 100 may refer to the related descriptions in the foregoing, which are not further described herein.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The terms first, second, third, fourth and the like in the description and in the claims of embodiments of the application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

Claims (18)

1. The circuit board assembly is characterized by comprising a circuit board, a battery and a battery protection board, wherein the battery is positioned on the circuit board and is communicated with the circuit board; the battery protection board comprises a packaging body and an electric connection unit, wherein the packaging body is positioned on the circuit board and is positioned at the side of the battery, and the electric connection unit is exposed on one surface of the packaging body, facing the circuit board, so as to conduct the packaging body and the circuit board.

2. The circuit board assembly of claim 1, wherein the package body comprises a carrier, an electronic component and a packaging colloid, the electrical connection unit is disposed on a side of the carrier facing the circuit board, the electronic component is disposed on a side of the carrier away from the circuit board, and the packaging colloid is packaged outside the electronic component.

3. The circuit board assembly of claim 1, wherein the electrical connection unit comprises a plurality of electrical connections evenly distributed across the package body to conduct the package body and the circuit board.

4. The circuit board assembly of claim 3, wherein the circuit board has a conductive portion thereon, and the electrical connection portion is disposed opposite the conductive portion and is in conductive communication with the conductive portion.

5. The circuit board assembly of claim 4, wherein the electrical connection is a solder ball or an electrode contact.

6. The circuit board assembly of any one of claims 1-5, wherein the package body is configured to monitor the voltage and charge-discharge current of the battery and control the on-off of the current loop of the battery.

7. The circuit board assembly of any one of claims 1-5, wherein the battery protection plate has a spacing from the battery.

8. The circuit board assembly of any one of claims 1-5, further comprising an electrical connection assembly, the outer surface of the battery having a positive pole and a negative pole, the electrical connection assembly being connected between the positive pole and the circuit board and between the negative pole and the circuit board to conduct the battery and the circuit board.

9. The circuit board assembly according to claim 8, wherein the battery has a metal case and an electrical connection protrusion on a peripheral side outer wall of the metal case and connected with the metal case in an insulating manner to form the positive electrode; the outer surface of the metal shell forms the negative electrode.

10. The circuit board assembly of claim 8, wherein the electrical connection assembly comprises a first electrical connection and a second electrical connection, the first electrical connection being connected between the positive electrode and the circuit board, the second electrical connection being connected between the negative electrode and the circuit board.

11. The circuit board assembly of claim 10, wherein one end of the first electrical connector is fixedly connected to the positive electrode and the other end is fixedly connected to the circuit board;

one end of the second electric connecting piece is fixedly connected with the negative electrode, and the other end of the second electric connecting piece is fixedly connected with the circuit board.

12. The circuit board assembly of claim 11, wherein the first electrical connector and the second electrical connector are each a metal tab, the metal tab being of a bent configuration.

13. The circuit board assembly of claim 10, wherein the first electrical connector is removably connected between the positive electrode and the circuit board, and/or,

the second electric connector is detachably connected between the negative electrode and the circuit board.

14. The circuit board assembly according to claim 13, wherein one end of the first electrical connector is fixedly connected to the circuit board and is conducted with the circuit board, and the other end of the first electrical connector is elastically abutted against the positive electrode;

one end of the second electric connecting piece is fixedly connected to the circuit board and is communicated with the circuit board, and the other end of the second electric connecting piece is elastically abutted to the negative electrode.

15. The circuit board assembly of claim 14, wherein the first electrical connector and the second electrical connector are metal clips that are soldered to the circuit board.

16. The circuit board assembly of claim 13, wherein the first electrical connector and the second electrical connector each comprise a first plug and a second plug that are plugged into each other, the first plug being fixedly connected to the circuit board and in communication with the circuit board, the second plug being fixedly connected to and in communication with the positive electrode or the negative electrode.

17. The circuit board assembly of claim 16, wherein the first plug is soldered to the circuit board and the second plug is soldered to the positive electrode or the negative electrode.

18. An electronic device comprising a housing and the circuit board assembly of any one of claims 1-17, the housing having a receiving cavity therein, the circuit board assembly being disposed within the receiving cavity.