WO2022063049A1 - Electronic device and control method for electronic device - Google Patents

Abstract

An electronic device (1) and a control method for the electronic device (1), which relate to the technical field of electronic devices (1). The electronic device (1) comprises a battery (11), a circuit board (12), and a detection processing unit (13). The battery (11) comprises an encapsulation film (112), and the encapsulation film (112) comprises a first metal layer (1121). The circuit board (12) and the battery (11) are relatively fixed, and at least part of the circuit board (12) is opposite to the surface of the battery (11) and has a gap. The part of the circuit board (12) opposite to the surface of the battery (11) and having the gap comprises a second metal layer (121). The second metal layer (121) and the first metal layer (1121) form a parallel plate capacitor. The detection processing unit (13) is electrically connected to the parallel plate capacitor. The detection processing unit (13) is used to detect a capacitance value of the parallel plate capacitor, and determine the swelling state of the battery (11) according to the capacitance value. The swelling state of the battery (11) is used to trigger an early warning or protection operation of the battery (11). The electronic device (1) is used to implement one or more electronic functions, and may detect and perform early warning or protect from the swelling of the battery (11) so as to reduce the possibility of the battery (11) causing safety accidents such as fire, explosion or poisoning.

Description

An electronic device and a control method for the electronic device

This application is required to be submitted to the State Intellectual Property Office on September 24, 2020, the application number is 202011016341.X, the name of the invention is "an electronic device and a control method for electronic equipment", and the national knowledge is submitted on December 16, 2020 The Intellectual Property Office, the application number is 202023044348.0, and the title of the invention is "an electronic device". The priority of two Chinese patent applications, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the technical field of electronic devices, and in particular, to an electronic device and a control method for the electronic device.

Background technique

Batteries are an essential component of electronic devices such as mobile phones, tablet computers, car monitors, and smart wearable devices. After long-term use, there will be a small probability of bulging problems. Although the proportion is small, it is very harmful. Specifically, due to falling, internal assembly extrusion and other reasons, the battery will be short-circuited instantaneously, and then thermal runaway will occur. After a certain volume, both sides of the battery release high temperature, flammable and explosive carbon monoxide (chemical formula: CO), hydrogen (chemical formula: H ₂ ) and other toxic and harmful gases, which are likely to cause fire, explosion, poisoning and other safety accidents.

SUMMARY OF THE INVENTION

The present application provides an electronic device and a control method for the electronic device, which can detect and give an early warning or protection to a battery bulge, so as to reduce the possibility of safety accidents such as fire, explosion or poisoning caused by the battery.

To achieve the above object, the embodiments of the present application adopt the following technical solutions:

In a first aspect, some embodiments of the present application provide an electronic device, the electronic device includes a battery, a circuit board, and a detection processing unit; the battery includes a battery core and a packaging film packaged outside the battery core, and the packaging film includes a first metal layer The circuit board is relatively fixed to the battery, and at least a part of the circuit board is opposite to the surface of the battery and has a gap, and the part of the circuit board that is opposite to the surface of the battery and has a gap includes a second metal layer, the second metal layer and the first metal layer The metal layer constitutes the parallel plate capacitor; the detection processing unit is electrically connected to the parallel plate capacitor, and the detection processing unit is used to detect the capacitance value of the parallel plate capacitor, and determine the bulging state of the battery according to the capacitance value, and the bulging state is used to trigger the battery Warning or preventive action.

In the electronic device provided by the embodiments of the present application, when the battery is bulging, the packaging film is bulged out of the battery, and the first metal layer in the packaging film moves in a direction close to the second metal layer in the circuit board, thereby changing the The capacitance value between the first metal layer in the encapsulation film and the second metal layer in the circuit board is determined, the capacitance value is detected by the detection processing unit, and the bulging state of the battery is determined according to the capacitance value. Early warning or protection to reduce the possibility of safety accidents such as fire, explosion or poisoning caused by the battery. At the same time, since the two pole plates constituting the parallel plate capacitor are respectively included in the packaging film and the circuit board, there is no need to provide additional pole plates, so the electronic device has a simple structure and low cost.

Optionally, the packaging film is an aluminum-plastic film, and the aluminum foil layer in the aluminum-plastic film constitutes the first metal layer of the packaging film.

Optionally, the aluminum plastic film includes an aluminum foil layer, a nylon surface layer and a resin layer, the nylon surface layer is disposed on the surface of the aluminum foil layer facing away from the battery core, and the resin layer is disposed on the surface of the aluminum foil layer facing the battery core.

Optionally, the circuit board includes, but is not limited to, a printed circuit board and a flexible circuit board.

Optionally, the circuit board further includes a first insulating medium layer and a second insulating medium layer, and the first insulating medium layer and the second insulating medium layer are arranged on opposite sides of the second metal layer to play a role in the second metal layer. protective effect.

Optionally, the electronic device also includes a control unit and an execution unit, the detection processing unit and the control unit, and between the execution unit and the control unit are all electrically connected, and the control unit is used to control the execution according to the bulge state determined by the detection processing unit. The unit executes the warning or protection operation corresponding to the bulge state. In this way, the early warning or protection of the battery bulge is realized, and the possibility of safety accidents such as fire, explosion or poisoning caused by the battery can be reduced.

Optionally, the first metal layer is a whole metal layer, the second metal layer is a whole metal layer, and the detection processing unit and the first metal layer and between the detection processing unit and the second metal layer are all electrically connected, The detection processing unit is used for detecting the capacitance value between the first metal layer and the second metal layer. This structure is simple and easy to implement.

Optionally, the first metal layer is a whole metal layer, the second metal layer includes a plurality of metal layer regions arranged in an array and arranged coplanarly, and the two adjacent metal layer regions are arranged at intervals, and the detection processing unit is connected with the multiple metal layer regions. Each of the metal layer regions is electrically connected, and the detection processing unit is used to detect the capacitance value between every two adjacent metal layer regions and the first metal layer. In this way, the bulge detection at multiple positions on the battery surface can be realized, and the detection processing unit and the electrical connection lines between the detection processing unit and each metal layer area can be arranged on the circuit board, thereby reducing the structural complexity of the electronic device .

Optionally, the electronic device further includes a front cover, a back cover and a middle frame, the middle frame includes a first surface and a second surface opposite to each other, the first surface of the middle frame faces the front cover and is fixed to the front cover, and the middle frame is fixed to the front cover. The second surface of the frame faces the back cover and is fixed to the back cover, the first surface of the middle frame or the second surface of the middle frame is provided with a battery accommodating groove, the circuit board is covered and fixed on the inner surface of the battery accommodating groove, the battery accommodating groove is in the battery accommodating groove and fixed with the inner surface of the battery accommodating groove. In this way, both the battery and the circuit board are fixed on the middle frame, so that when the user touches or presses the front cover and the back cover, the battery or the circuit board is driven to move, thereby affecting the structure formed by the first metal layer and the second metal layer. The detection accuracy of the capacitance value of the parallel plate capacitor.

Optionally, the electronic device further includes a capacitive touch display screen and a main board; the circuit board is electrically connected between the capacitive touch display screen and the main board, the circuit board includes a touch control chip, the detection processing unit is a touch control chip, the control unit is a main board, and the touch control unit is a touch control chip. The control chip is also used to detect the touch capacitance value of the capacitive touch display screen, and determine the touch position according to the touch capacitance value, and the motherboard is also used to control the capacitive touch display screen to perform operations corresponding to the touch position according to the touch position. In this way, the detection of the capacitance value of the parallel plate capacitor and the early warning or protection operation control of the battery can be realized with the help of the main board and the touch chip of the electronic device without the need to set up a detection processing unit and a control unit, thereby reducing the complexity of the structure of the electronic device. degree, saving the cost of electronic equipment.

Optionally, the execution unit is a capacitive touch display screen. In this way, the control unit can control the execution unit to display graphic or text information corresponding to the bulge state according to the bulge state determined by the detection processing unit, so as to prompt the user about the bulge state of the battery or a corresponding processing suggestion.

Optionally, the electronic device further includes a power management unit, the power management unit is electrically connected to the battery, the power management unit is used to reduce the charging current of the battery or turn off the charging function of the battery, and the execution unit is a power management unit. In this way, the control unit can control the execution unit to reduce the charging current of the battery or turn off the charging function of the battery according to the bulge state determined by the detection processing unit.

Optionally, the distance between the first metal layer and the second metal layer when the battery is not bulged is less than or equal to 2 mm. In this way, it is possible to avoid influence on the compactness and thinning of the electronic device.

Optionally, the distance between the centers of two adjacent metal layer regions is 16 mm˜36 mm. In this way, the sensitivity of the parallel plate capacitor formed by the first metal layer and the second metal layer (that is, the capacitance change rate of the parallel plate capacitor) is greater than 0.1, the sensitivity is better, and the signal-to-noise ratio is 20dB～40dB, so meet the usage requirements.

In a second aspect, some embodiments of the present application provide a control method for an electronic device, wherein the electronic device includes a battery, a circuit board, and a detection processing unit, the battery includes a battery core and a packaging film packaged outside the battery core, and the packaging film includes a first A metal layer; the circuit board is relatively fixed to the battery, and at least part of the circuit board is opposite to the surface of the battery and has a gap, and the part of the circuit board that is opposite to the surface of the battery and has a gap includes a second metal layer, the second metal layer A parallel plate capacitor is formed with the first metal layer; the detection processing unit is electrically connected with the parallel plate capacitor, and the control method includes: the detection processing unit detects the capacitance value of the parallel plate capacitor; the detection processing unit detects the capacitance value of the parallel plate capacitor, Determine the bulge status of the battery, which is used to trigger an early warning or protection operation of the battery.

In the control method of the electronic device provided in the embodiment of the present application, when the battery is bulging, the packaging film bulges out of the battery, and the first metal layer in the packaging film moves in a direction close to the second metal layer in the circuit board, Therefore, the capacitance value between the first metal layer in the packaging film and the second metal layer in the circuit board is changed, the capacitance value is detected by the detection processing unit, and the bulging state of the battery determined according to the capacitance value can be detected. The battery bulge is used for early warning or protection to reduce the possibility of fire, explosion or poisoning caused by the battery. At the same time, since the two pole plates constituting the parallel plate capacitor are respectively included in the packaging film and the circuit board, there is no need to provide additional pole plates, so the electronic device has a simple structure and low cost.

Optionally, the first metal layer is a whole metal layer, the second metal layer is a whole metal layer, the detection processing unit and the first metal layer and between the detection processing unit and the second metal layer are all electrically connected, and the detection processing unit is electrically connected to the second metal layer. The processing unit detecting the capacitance value of the parallel plate capacitance includes: the detecting processing unit detects the capacitance value between the first metal layer and the second metal layer. This method is simple and easy to implement.

Optionally, the first metal layer is a whole metal layer, the second metal layer includes a plurality of metal layer regions arranged in an array and arranged coplanarly, and the two adjacent metal layer regions are arranged at intervals, and the detection processing unit is connected with the multiple metal layer regions. Each of the metal layer regions is electrically connected, and the detection processing unit detecting the capacitance value of the parallel plate capacitance includes: the detection processing unit detects the capacitance value between every two adjacent metal layer regions and the first metal layer. The method is simple and easy to implement, and can perform bulge detection on multiple positions on the battery surface.

Optionally, the electronic device further includes a control unit and an execution unit, the detection processing unit and the control unit, and between the execution unit and the control unit are all electrically connected, after determining the bulge state of the battery, the control unit also includes: the control unit according to the detection The bulge state determined by the processing unit is controlled, and the execution unit is controlled to perform an early warning or protection operation corresponding to the bulge state. In this way, the early warning or protection of the battery bulge is realized, and the possibility of safety accidents such as fire, explosion or poisoning caused by the battery can be reduced.

Optionally, the detection and processing unit determining the bulging state of the battery according to the detected capacitance value of the parallel plate capacitance includes: when the capacitance value of the parallel plate capacitance detected by the detection processing unit is less than or equal to the first preset threshold, the detection process is performed. The unit determines that the battery is in a non-bulging state; when the capacitance value of the parallel plate capacitance detected by the detection processing unit is greater than the first preset threshold and less than the second preset threshold, the detection processing unit determines that the battery is in the first bulging state; when the detection process When the capacitance value of the parallel plate capacitance detected by the unit is greater than or equal to the second preset threshold, the detection processing unit determines that the battery is in the second bulging state.

Optionally, the electronic device further includes a power management unit, the power management unit is electrically connected to the battery, the power management unit is used to reduce the charging current of the battery or turn off the charging function of the battery, and the execution unit is a power management unit; The bulging state determined by the unit, and controlling the execution unit to perform the warning or protection operation corresponding to the bulging state includes: when the detection processing unit determines that the battery is in a non-bulging state, the control unit does not control the execution unit to perform the warning and protection operations; when the detection processing unit determines When the battery is in the first bulging state, the control unit controls the execution unit to reduce the charging current of the battery; when the detection and processing unit determines that the battery is in the second bulging state, the control unit controls the execution unit to turn off the charging function of the battery.

Optionally, the execution unit is a capacitive touch display screen, and the control unit controls the execution unit to perform an early warning or protection operation corresponding to the bulge state according to the bulge state determined by the detection processing unit. The control unit controls the execution unit according to the bulge state determined by the detection processing unit. The unit displays graphic or text information corresponding to the bulging state, and the graphic or text information is used to prompt the user about the bulging state of the battery or corresponding processing suggestions.

Description of drawings

FIG. 1 is a structural block diagram of an electronic device provided by some embodiments of the present application;

2 is a schematic structural diagram of a battery in an electronic device provided by some embodiments of the present application;

3 is a schematic structural diagram of a portion of a circuit board in an electronic device that is opposite to the surface of the battery and has a gap according to some embodiments of the present application;

FIG. 4 is a schematic diagram of a partial structure of the battery, the circuit board and the detection processing unit in the electronic device shown in FIG. 1;

Fig. 5 is another partial structural schematic diagram of the battery, the circuit board and the detection processing unit in the electronic device shown in Fig. 1;

6 is a front view of the electronic device shown in FIG. 1;

7 is a schematic cross-sectional structure diagram of the electronic device shown in FIG. 6 along the A-A direction;

FIG. 8 is a schematic cross-sectional structure diagram of the electronic device shown in FIG. 6 along the B-B direction;

9 is a flowchart of a control method of an electronic device provided by some embodiments of the present application;

FIG. 10 is a flowchart of a control method of an electronic device provided by further embodiments of the present application.

Reference number:

1-electronic equipment; 11-battery; 111-battery core; 112-encapsulation film; 1121-first metal layer; 1122-nylon surface layer; 1123-resin layer; 1124-adhesive layer; 12-circuit board; 13-detection treatment unit; 121-second metal layer; 122-first insulating dielectric layer; 123-second insulating dielectric layer; 1211-first metal layer region; 1212-second metal layer region; 1213-third metal layer region; 14 -control unit; 15-execution unit; 16-front cover; 17-back cover; 18-middle frame; 100-first surface; 200-second surface; 300-battery holding slot; 19-capacitive touch display screen; 20-mainboard; 400-mainboard mounting slot; 21-touch chip.

detailed description

In the embodiments of the present application, the terms "first", "second" and "third" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", "third" may expressly or implicitly include one or more of that feature.

The present application provides an electronic device, which is a type of electronic device including a circuit board and a battery, wherein the battery includes but is not limited to a rechargeable nickel-metal hydride battery, a lithium-ion battery, and a lead-acid battery. Specifically, electronic devices include, but are not limited to, smart phones, tablet computers, in-vehicle displays, and smart wearable devices.

Please refer to FIG. 1 , which is a structural block diagram of an electronic device 1 according to some embodiments of the present application. The electronic device 1 includes a battery 11 , a circuit board 12 and a detection processing unit 13 .

The battery 11 is used to supply power to various electronic devices in the electronic device 1 . The battery 11 includes, but is not limited to, rechargeable nickel-metal hydride batteries, lithium-ion batteries, and lead-acid batteries. The battery 11 includes a battery cell 111 and a packaging film 112 packaged outside the battery cell 111 . The battery cell 111 is a battery main body that realizes the functions of charging, storing, and discharging the battery. The packaging film 112 is used to package the battery core 111 and protect the battery core 111 from pollution, corrosion resistance and external force damage. The packaging film 112 includes a first metal layer 1121. The packaging film 112 includes but is not limited to aluminum plastic The aluminum foil layer in the film constitutes the first metal layer 1121 .

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of a battery 11 in an electronic device 1 according to some embodiments of the present application. The packaging film 112 of the battery 11 is an aluminum laminated film (ALF). Specifically, the packaging film 112 It includes an aluminum foil layer, a nylon surface layer 1122 and a resin (cast polypropylene, CPP) layer 1123. The aluminum foil layer constitutes the first metal layer 1121 , and the aluminum foil layer is the base material of the packaging film 112 , which functions as a waterproof barrier and defines the product form of the packaging film. The nylon surface layer 1122 is disposed on the surface of the aluminum foil layer away from the battery core 111 , and the nylon surface layer 1122 is made of nylon or a compound of nylon and polyethylene terephthalate (PET), which is mainly used for anti-pollution, Corrosion resistance and protection from external damage. The resin layer 1123 is disposed on the surface of the aluminum foil layer facing the battery core 111 , mainly for sealing and bonding, and for isolating the aluminum foil layer and the battery core 111 to prevent the electrolyte in the battery core 111 from leaking and corroding the aluminum foil layer. The adhesive layer 1124 is used to bond between the aluminum foil layer and the nylon surface layer 1122 and between the aluminum foil layer and the resin layer 1123 .

Please continue to refer to FIG. 1 , the circuit board 12 plays the role of an integrated circuit or electrically connecting electronic devices (such as a display screen, a speaker) to the main board, and the circuit board 12 includes but is not limited to a printed circuit board (PCB) and A flexible printed circuit board (FPC) is not specifically limited here. The circuit board 12 is relatively fixed to the battery 11, and at least a part of the circuit board 12 is opposite to the surface of the battery 11 and has a gap (the medium in the gap is air), and the part of the circuit board 12 opposite to the surface of the battery 11 with a gap includes: The second metal layer 121 .

Please refer to FIG. 3 , which is a schematic structural diagram of a portion of the circuit board 12 in the electronic device 1 that is opposite to the surface of the battery 11 and has a gap according to some embodiments of the present application. The circuit board 12 is a flexible circuit board, and the circuit board 12 includes a second metal layer 121 and a first insulating medium layer 122 and a second insulating medium layer 123 disposed on opposite sides of the second metal layer 121 . The material of the second metal layer 121 includes, but is not limited to, copper. Materials of the first insulating dielectric layer 122 and the second insulating dielectric layer 123 include, but are not limited to, polyimide (PI). play a protective role.

The first metal layer 1121 in the encapsulation film 112 and the second metal layer 121 in the circuit board 12 form a parallel plate capacitor, the detection processing unit 13 is electrically connected to the parallel plate capacitor, and the detection processing unit 13 is used to detect the parallel plate capacitance The capacitance value of the battery 11 is determined, and the bulging state of the battery 11 is determined according to the capacitance value, and the bulging state of the battery 11 is used to trigger an early warning or protection operation of the battery 11 .

In this way, when the battery 11 is bulged, the packaging film 112 bulges out of the battery 11, and the first metal layer 1121 in the packaging film 112 moves toward the direction close to the second metal layer 121 in the circuit board 12, thereby changing the packaging The capacitance value between the first metal layer 1121 in the film 112 and the second metal layer 121 in the circuit board 12, the capacitance value is detected by the detection processing unit 13, and the bulging state of the battery 11 determined according to the capacitance value can be Carry out warning or protection for battery bulging to reduce the possibility of fire, explosion or poisoning caused by the battery. Moreover, since the two pole plates constituting the parallel plate capacitor are respectively included in the encapsulation film 112 and the circuit board 12, there is no need to provide additional pole plates, so the electronic device 1 has a simple structure and low cost.

In the above embodiment, the first metal layer 1121 in the encapsulation film 112 is a whole metal layer, and the second metal layer 121 in the circuit board 12 can be a whole metal layer, or it can be arranged in an array and arranged coplanarly The multiple metal layer regions are arranged at intervals between two adjacent metal layer regions, which are not specifically limited here. According to the different structural forms of the second metal layer 121 in the circuit board 12, the connection method of the detection processing unit 13 may include the following two embodiments:

Embodiment 1: Please refer to FIG. 4 , which is a partial structural schematic diagram of the battery 11 , the circuit board 12 and the detection processing unit 13 in the electronic device 1 shown in FIG. 1 . The first metal layer 1121 in the packaging film 112 is a whole metal layer, the second metal layer 121 in the circuit board 12 is also a whole metal layer, between the detection processing unit 13 and the first metal layer 1121, and the detection processing unit 13 and the second metal layer 121 are all electrically connected, and the detection processing unit 13 is used to detect the capacitance value C _a between the first metal layer 1121 and the second metal layer 121 , and determine the bulge of the battery according to the capacitance value C _a condition. The capacitance value between the first metal layer 1121 and the second metal layer 121 is _Ca =ε ₀ εS/g, where ε ₀ =1/4πk, k represents the electrostatic force constant; ε is the first metal layer 1121 and the second metal The dielectric constant of the medium between the layers 121 ; S is the facing area between the first metal layer 1121 and the second metal layer 121 ; g is the distance between the first metal layer 1121 and the second metal layer 121 . It can be seen from this that, when the structure of the electronic device 1 is fixed, the capacitance value _Ca between the first metal layer 1121 and the second metal layer 121 and the distance g between the first metal layer 1121 and the second metal layer 121 are inversely proportional to each other, the distance g between the first metal layer 1121 and the second metal layer 121 can be obtained by detecting the size of the capacitance value C _a , and then the bulging height of the packaging film 112 can be obtained. Therefore, the detection processing unit 13 detects The capacitance value C _a can realize the detection of the bulging state of the battery 11 .

Embodiment 2: Please refer to FIG. 5 , which is another partial structural schematic diagram of the battery 11 , the circuit board 12 and the detection processing unit 13 in the electronic device 1 shown in FIG. 1 . The first metal layer 1121 in the encapsulation film 112 is a whole metal layer, and the second metal layer 121 in the circuit board 12 includes a plurality of metal layer regions arranged in an array and coplanarly arranged, and between two adjacent metal layer regions interval setting. The number of metal layer regions included in the second metal layer 121 may be two or more than three, which is not specifically limited here. The plurality of metal layer regions may be arranged in an array in a row, or in a row, or The array is arranged in multiple rows and multiple columns, which is not specifically limited here. FIG. 5 only shows that the number of metal layer regions included in the second metal layer 121 is three (respectively, the first metal layer region 1211 , the second metal layer region 1212 and the third metal layer region 1213 ), and the three The example that the metal layer area arrays are arranged in a row should not be regarded as a special limitation of the composition of the present application. The detection processing unit 13 is electrically connected to each metal layer region in the plurality of metal layer regions, and the detection processing unit 13 is used to detect the capacitance value C _b between every two adjacent metal layer regions and the first metal layer 1121 , And the bulging state of the battery is determined according to the capacitance value C _b . The capacitance between each two adjacent metal layer regions and the first metal layer 1121 can be understood as the capacitance between the two metal layer regions and the capacitance formed by the first metal layer 1121 respectively connected in series with the capacitance between the two metal layer regions. The capacitors are connected in parallel. For example, the capacitor A between the first metal layer region 1211, the second metal layer region 1212 and the first metal layer 1121 can be understood as the capacitor A ₁ and the capacitor A ₂ are connected in series and then connected in parallel with the capacitor A ₁₂ , wherein, Capacitor A1 represents the capacitance between the _first metal layer region 1211 and the first metal layer 1121, capacitor A2 represents the capacitance between the _second metal layer region 1212 and the first metal layer 1121, and capacitor _A12 represents the first metal layer The capacitance between the region 1211 and the second metal layer region 1212 . Capacitance value C ₁ of capacitor A ₁ =ε ₀ ε ₁ S ₁ /g, capacitance value of capacitor A ₂ C ₂ =ε ₀ ε ₁ S ₂ /g, capacitance value of capacitor A12 C ₁₂ =ε ₀ ε ₂ S ₁₂ /d, then the expression of capacitance C _b of capacitor A is:

C _b =C ₁₂ +(C ₁ *C ₂ )/(C ₁ +C ₂ )=ε ₀ ε ₂ S ₁₂ /d+ε ₀ ε ₁ S ₁ S ₂ /[(S ₁ +S ₂ )g] .

ε ₀ =1/4πk, k represents the electrostatic force constant; ε ₁ is the dielectric constant of the medium between the first metal layer 1121 and the second metal layer 121 ; ε ₂ is the first metal layer region 1211 and the second metal layer 121 The dielectric constant of the medium between the metal layer regions 1212; S ₁ is the facing area between the first metal layer region 1211 and the first metal layer 1121; S ₂ is the second metal layer region 1212 and the first metal layer 1121 S ₁₂ is the equivalent facing area between the first metal layer region 1211 and the second metal layer region 1212; g is the first metal layer 1121 and the first metal layer region 1211 or the second metal layer The distance between the layer regions 1212 ; d is the distance between the first metal layer region 1211 and the second metal layer region 1212 . It can be seen from this that the capacitance value C _b between every two adjacent metal layer regions and the first metal layer 1121 is inversely proportional to the distance g between the first metal layer 1121 and the two adjacent metal layer regions, The distance g between the first metal layer 1121 and the two adjacent metal layer regions can be obtained by detecting the size of the capacitance value C _b , and then the distance g of the portion of the packaging film 112 opposite to the two adjacent metal layer regions can be obtained. For the bulge height, the detection processing unit 13 detects the capacitance value C _b between the two adjacent metal layer regions and the first metal layer 1121 at different positions, so that the bulge detection of the battery 11 at each position can be realized. The structure is simple, and the detection processing unit 13 and the electrical connection lines between the detection processing unit 13 and each metal layer region can be disposed on the circuit board 12, thereby reducing the structural complexity of the electronic device.

In the above-mentioned first or second embodiment, the distance g ₀ ≤ 2 mm between the first metal layer 1121 and the second metal layer 121 when the battery 11 is not bulged, so that the compactness and thinness of the electronic device can be avoided. ization has an impact.

In the second embodiment above, the distance L between the centers of two adjacent metal layer regions is 16 mm˜36 mm. In this way, the sensitivity of the parallel plate capacitor formed by the first metal layer 1121 and the second metal layer 121 (that is, the capacitance change rate of the parallel plate capacitor) is greater than 0.1, the sensitivity is better, and the signal-to-noise ratio is 20dB～40dB , so it meets the usage requirements.

Please continue to refer to FIG. 1 , the electronic device 1 further includes a control unit 14 and an execution unit 15 , the detection processing unit 13 and the control unit 14 and between the execution unit 15 and the control unit 14 are all electrically connected, and the control unit 14 is used for According to the bulge state determined by the detection processing unit 13, the control execution unit 15 executes an early warning or protection operation corresponding to the bulge state.

The control unit 14 may be the main board of the electronic device 1, or may be a sub-board connected to the main board of the electronic device 1, which is not specifically limited herein.

In the embodiment shown in FIG. 1 , the battery 11 and the circuit board 12 may be disposed on the middle frame of the electronic device, or may be disposed on the back cover of the electronic device, which are not specifically limited herein.

Please refer to FIGS. 6 to 8 , FIG. 6 is a front view of the electronic device 1 shown in FIG. 1 , FIG. 7 is a schematic cross-sectional structure diagram of the electronic device 1 shown in FIG. 6 along the AA direction, and FIG. 8 is the electronic device shown in FIG. 6 1 Schematic diagram of the cross-sectional structure along the BB direction. The electronic device 1 further includes a front cover 16 , a back cover 17 and a middle frame 18 . The middle frame 18 includes a first surface 100 and a second surface 200 that are opposed. The first surface 100 of the middle frame 18 faces the front cover 16 and is fixed to the front cover 16. In some embodiments, the edge of the first surface 100 of the middle frame 18 and the edge of the front cover 16 are bonded by adhesive material a fixed. The second surface 200 of the middle frame 18 faces the back cover 17 and is fixed to the back cover 17 . In some embodiments, the edge of the second surface 200 of the middle frame 18 and the edge of the back cover 17 are bonded and fixed by adhesive material b. The first surface 100 of the middle frame 18 or the second surface 200 of the middle frame 18 is provided with a battery accommodating groove 300 . FIGS. 6-8 only show an example in which the battery accommodating groove 300 is disposed on the second surface 200 of the middle frame 18 , It should not be considered as a special limitation to the present application. The circuit board 12 is attached and fixed on the inner surface of the battery accommodating slot 300 , wherein the inner surface of the battery accommodating slot 300 includes the inner side and bottom surface of the battery accommodating slot 300 , and the circuit board 12 can be attached to the inner surface of the battery accommodating slot 300 . On the side surface and/or the bottom surface, FIGS. 6-8 only show examples where the circuit board 12 is attached to the inner side surface and the bottom surface of the battery accommodating slot 300 , and should not be regarded as a special limitation of the present application. The circuit board 12 can be fixed on the inner surface of the battery accommodating slot 300 by clamping, screwing, bonding, etc. FIG. 6 to FIG. 8 only show the circuit board 12 fixed to the battery accommodating slot 300 by adhesive material d. The example of the inner surface should not be regarded as a special limitation of the present application. The battery 11 is accommodated in the battery accommodating groove 300 and fixed to the inner surface of the battery accommodating groove 300 . In some embodiments, the battery 11 is adhered to the bottom surface of the battery accommodating groove 300 through the adhesive material c. In this way, both the battery 11 and the circuit board 12 are fixed on the middle frame 18 to prevent the user from touching or pressing the front cover 16 and the back cover 17 , driving the battery 11 or the circuit board 12 to move, thereby affecting the first metal layer 1121 and the detection accuracy of the capacitance value of the parallel plate capacitor formed by the second metal layer 121 .

In some embodiments, please continue to refer to FIGS. 6-8 , the electronic device 1 further includes a capacitive touch display screen 19 and a main board 20 . In some embodiments, the front cover 16 is a light-transmitting cover, and the capacitive touch display screen 19 is disposed between the front cover 16 and the first surface 100 of the middle frame 18 , further optionally, the capacitive touch display 19 is attached to the It is disposed on the surface of the front cover 16 facing the first surface 100 of the middle frame 18 . In some embodiments, the mainboard 20 is disposed on the middle frame 18 , further optionally, a mainboard mounting groove 400 is formed on the second surface 200 of the middle frame 18 , and the mainboard 20 is installed in the mainboard mounting groove 400 . The circuit board 12 is electrically connected between the capacitive touch display screen 19 and the main board 20 , the circuit board 12 includes a touch control chip 21 , the detection processing unit 13 is the touch control chip 21 , the control unit 14 is the main board 20 , and the touch control chip 21 is also used for The touch capacitance value of the capacitive touch display screen 19 is detected, and the touch position is determined according to the touch capacitance value. The main board 20 is further configured to control the capacitive touch display screen 19 to perform an operation corresponding to the touch position according to the touch position. In this way, the detection of the capacitance value of the parallel plate capacitor and the early warning or protection operation control of the battery can be realized by means of the main board 20 and the touch chip 21 of the electronic device 1 without additionally providing the detection processing unit 13 and the control unit 14, thereby reducing the The structural complexity of the electronic device 1 saves the cost of the electronic device 1 .

In some embodiments, please continue to refer to FIGS. 6-8 , the execution unit 15 is a capacitive touch display screen 19 . In this way, the control unit 14 can control the execution unit 15 to display graphic or text information corresponding to the bulge state according to the bulge state determined by the detection processing unit 13 to prompt the user of the bulge state of the battery or corresponding processing suggestions.

In other embodiments, the electronic device 1 further includes a power management unit (not shown in the figure), the power management unit is electrically connected to the battery 11 , and the power management unit is used to reduce the charging current of the battery 11 or turn off the battery 11 . For the charging function, the execution unit 15 is a power management unit. In this way, the control unit 14 can control the execution unit 15 to reduce the charging current of the battery 11 or turn off the charging function of the battery 11 according to the bulge state determined by the detection processing unit 13 .

Please refer to FIG. 9 , which is a flowchart of a control method of an electronic device 1 provided by some embodiments of the present application. The structure of the electronic device 1 is shown in FIG. 1 . Specifically, the electronic device 1 includes a battery 11 , a circuit board 12 and a detection processing unit 13 . The battery 11 includes a battery core 111 and a packaging film 112 packaged outside the battery core 111 . The film 112 includes a first metal layer 1121; the circuit board 12 is relatively fixed to the battery 11, and at least a part of the circuit board 12 is opposite to the surface of the battery 11 and has a gap, and the part of the circuit board 12 is opposite to the surface of the battery 11 and has a gap It includes a second metal layer 121, and the second metal layer 121 and the first metal layer 1121 form a parallel plate capacitor; the detection processing unit 13 is electrically connected to the parallel plate capacitor, and the control method includes:

S100: The detection processing unit 13 detects the capacitance value of the parallel plate capacitance.

In some embodiments, please refer to FIG. 4 , the first metal layer 1121 is a whole metal layer, the second metal layer 121 is a whole metal layer, between the detection processing unit 13 and the first metal layer 1121 , and the detection processing unit 13 and the second metal layer 121 are all electrically connected, and step S100 includes: the detection processing unit 13 detects the capacitance value between the first metal layer 1121 and the second metal layer 121 .

In other embodiments, please refer to FIG. 5 , the first metal layer 1121 is a whole metal layer, the second metal layer 121 includes a plurality of metal layer regions arranged in an array and arranged coplanarly, and two adjacent metal layer regions The detection processing unit 13 is electrically connected to each metal layer area in the plurality of metal layer areas. Step S100 includes: the detection processing unit 13 detects the difference between each adjacent two metal layer areas and the first metal layer 1121. capacitance value between.

S200: The detection processing unit 13 determines a bulge state of the battery 11 according to the detected capacitance value of the parallel plate capacitance, and the bulge state is used to trigger an early warning or protection operation of the battery.

In the control method of the electronic device provided by the embodiment of the present application, when the battery 11 is bulged, the packaging film 112 is bulged out of the battery 11 , and the first metal layer 1121 in the packaging film 112 is close to the second metal layer in the circuit board 12 . The direction of the metal layer 121 moves, thereby changing the capacitance value between the first metal layer 1121 in the encapsulation film 112 and the second metal layer 121 in the circuit board 12, and the capacitance value is detected by the detection processing unit 13, and according to The bulging state of the battery 11 determined by the capacitance value can give an early warning or protection to the bulging of the battery, so as to reduce the possibility of safety accidents such as fire, explosion or poisoning caused by the battery. Moreover, since the two pole plates constituting the parallel plate capacitor are respectively included in the encapsulation film 112 and the circuit board 12, there is no need to provide additional pole plates, so the electronic device 1 has a simple structure and low cost.

In some embodiments, step S200 includes: when the capacitance value of the parallel plate capacitance detected by the detection processing unit 13 is less than or equal to the first preset threshold, the detection processing unit 13 determines that the battery 11 is in a non-swelling state; when the detection processing unit 13 13 When the capacitance value of the detected parallel plate capacitance is greater than the first preset threshold and smaller than the second preset threshold, the detection processing unit 13 determines that the battery 11 is in the first bulging state; When the capacitance value is greater than or equal to the second preset threshold, the detection processing unit 13 determines that the battery 11 is in the second bulging state.

In the above embodiment, the first preset threshold is smaller than the second preset threshold, and the first preset threshold may be 0.05uF, 0.08uF, 0.06uF, etc., which is not specifically limited here, and the second preset threshold may be 1.2 uF, 1.5uF, 1.8uF, 1.6uF, etc., are not specifically limited here. Specifically, the size of the first preset threshold and the second preset threshold can be based on the initial capacitance value of the actual parallel plate capacitor, the first metal Parameters such as the distance between the layer 1121 and the second metal layer 121 and the capacitance change rate of the parallel plate capacitance are comprehensively determined.

Please continue to refer to FIG. 1 , the electronic device 1 further includes a control unit 14 and an execution unit 15 , and the detection processing unit 13 and the control unit 14 and between the execution unit 15 and the control unit 14 are all electrically connected. On this basis, please Referring to FIG. 10, FIG. 10 is a flowchart of the control method of the electronic device 1 provided by some other embodiments of the present application. After step S200, it further includes:

S300: The control unit 14 controls the execution unit 15 to execute an early warning or protection operation corresponding to the bulge state according to the bulge state determined by the detection processing unit 13.

In some embodiments, the electronic device 1 further includes a power management unit, the power management unit is electrically connected to the battery 11 , the power management unit is used to reduce the charging current of the battery 11 or turn off the charging function of the battery 11 , and the execution unit 15 is the power source The management unit, step S300 includes: when the detection and processing unit 13 determines that the battery 11 is in a non-swelling state, the control unit 14 does not control the execution unit 15 to perform an early warning and protection operation; when the detection and processing unit 13 determines that the battery 11 is in the first bulging state, The control unit 14 controls the execution unit 15 to reduce the charging current of the battery 11 ; when the detection processing unit 13 determines that the battery 11 is in the second bulging state, the control unit 14 controls the execution unit 15 to turn off the charging function of the battery 11 .

In other embodiments, the execution unit 15 is a capacitive touch display screen, and step S300 includes: the control unit 14 controls the execution unit 15 to display graphics or text information corresponding to the bulge state according to the bulge state determined by the detection processing unit 13, and the graphic Or text information is used to prompt the user about the bulging state of the battery or a corresponding handling suggestion.

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

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims (18)

1. An electronic device, comprising:

   a battery, the battery includes a battery core and an encapsulation film packaged outside the battery core, the encapsulation film includes a first metal layer;

   A circuit board, the circuit board is relatively fixed to the battery, and at least a part of the circuit board is opposite to the surface of the battery and has a gap, and the part of the circuit board is opposite to the surface of the battery and has a gap comprising a second metal layer, the second metal layer and the first metal layer form a parallel plate capacitor;

   A detection processing unit, the detection processing unit is electrically connected to the parallel plate capacitor, and the detection processing unit is used to detect the capacitance value of the parallel plate capacitor, and determine the bulge state of the battery according to the capacitance value, and the bulge The state is used to trigger an early warning or guard action on the battery.
2. The electronic device of claim 1, further comprising:

   A control unit and an execution unit, the detection processing unit and the control unit, as well as between the execution unit and the control unit are all electrically connected, and the control unit is used for the bulge determined according to the detection processing unit state, control the execution unit to execute the warning or protection operation corresponding to the bulge state.
3. The electronic device according to claim 1 or 2, wherein the first metal layer is a whole metal layer, the second metal layer is a whole metal layer, and the detection processing unit is connected to the first metal layer. The metal layers and between the detection processing unit and the second metal layer are all electrically connected, and the detection processing unit is used to detect the capacitance value between the first metal layer and the second metal layer .
4. The electronic device according to claim 1 or 2, wherein the first metal layer is a whole metal layer, and the second metal layer comprises a plurality of metal layer regions arranged in an array and coplanar The two adjacent metal layer regions are arranged at intervals, the detection processing unit is electrically connected to each metal layer region in the plurality of metal layer regions, and the detection processing unit is used to detect every two adjacent metal layer regions. The capacitance value between the metal layer region and the first metal layer.
5. The electronic device according to any one of claims 1-4, further comprising:

   front cover;

   back cover;

   A middle frame, the middle frame includes an opposite first surface and a second surface, the first surface of the middle frame faces the front cover and is fixed to the front cover, and the second surface of the middle frame faces The back cover is fixed to the back cover, the first surface of the middle frame or the second surface of the middle frame is provided with a battery accommodating groove, and the circuit board is pasted and fixed on the battery accommodating groove. On the inner surface, the battery is accommodated in the battery accommodating groove and fixed with the inner surface of the battery accommodating groove.
6. The electronic device according to claim 2, further comprising:

   Capacitive touch display;

   motherboard;

   The circuit board is electrically connected between the capacitive touch display screen and the main board, the circuit board includes a touch control chip, the detection processing unit is the touch control chip, and the control unit is the main board, The touch chip is also used to detect the touch capacitance value of the capacitive touch display screen, and determine the touch position according to the touch capacitance value, and the motherboard is further used to control the capacitive touch display screen according to the touch position The operation corresponding to the touch position is performed.
7. The electronic device according to claim 6, wherein the execution unit is the capacitive touch display screen.
8. The electronic device according to claim 2, further comprising:

   a power management unit, the power management unit is electrically connected to the battery, the power management unit is used to reduce the charging current of the battery or turn off the charging function of the battery, and the execution unit is the power management unit .
9. The electronic device according to any one of claims 1-8, wherein a distance between the first metal layer and the second metal layer is less than or equal to 2 mm when the battery is not bulged.
10. The electronic device according to claim 4, wherein the distance between the centers of two adjacent metal layer regions is 16 mm˜36 mm.
11. The electronic device according to any one of claims 1-10, wherein the packaging film is an aluminum-plastic film, and an aluminum foil layer in the aluminum-plastic film constitutes a first metal layer of the packaging film.
12. A control method for an electronic device, characterized in that the electronic device includes a battery, a circuit board and a detection processing unit, the battery includes a battery core and a packaging film packaged outside the battery core, the packaging film includes a first a metal layer; the circuit board is relatively fixed to the battery, and at least a part of the circuit board is opposite to the surface of the battery and has a gap, and the surface of the circuit board is opposite to the surface of the battery and has a gap The part includes a second metal layer, and the second metal layer and the first metal layer form a parallel-plate capacitor; the detection processing unit is electrically connected to the parallel-plate capacitor, and the control method includes:

    The detection processing unit detects the capacitance value of the parallel plate capacitance;

    The detection processing unit determines the bulge state of the battery according to the detected capacitance value of the parallel plate capacitance, and the bulge state is used to trigger an early warning or protection operation of the battery.
13. The control method of an electronic device according to claim 12, wherein the first metal layer is a whole metal layer, the second metal layer is a whole metal layer, and the detection processing unit is connected to the first metal layer. Between a metal layer, and between the detection processing unit and the second metal layer are all electrically connected, and the detection processing unit detects the capacitance value of the parallel plate capacitor including:

    The detection processing unit detects a capacitance value between the first metal layer and the second metal layer.
14. The control method of an electronic device according to claim 12, wherein the first metal layer is a whole metal layer, the second metal layer comprises a plurality of metal layer regions arranged in an array and arranged coplanarly, The two adjacent metal layer regions are arranged at intervals, the detection processing unit is electrically connected to each metal layer region in the plurality of metal layer regions, and the detection processing unit detects the capacitance value of the parallel plate capacitor include:

    The detection processing unit detects a capacitance value between every two adjacent metal layer regions and the first metal layer.
15. The method for controlling an electronic device according to any one of claims 12-14, wherein the electronic device further comprises a control unit and an execution unit, and between the detection processing unit and the control unit, the Both the execution unit and the control unit are electrically connected, and after determining the bulging state of the battery, the method further includes:

    The control unit controls the execution unit to perform an early warning or protection operation corresponding to the bulge state according to the bulge state determined by the detection processing unit.
16. The control method of electronic equipment according to claim 15, is characterized in that, described detection processing unit According to the capacitance value of described parallel plate capacitance detected, it is determined that the bulging state of described battery comprises:

    When the capacitance value of the parallel plate capacitance detected by the detection processing unit is less than or equal to a first preset threshold value, the detection processing unit determines that the battery is in a non-bulging state;

    When the capacitance value of the parallel plate capacitance detected by the detection processing unit is greater than the first preset threshold and less than a second preset threshold, the detection processing unit determines that the battery is in a first bulging state;

    When the capacitance value of the parallel plate capacitance detected by the detection processing unit is greater than or equal to the second preset threshold, the detection processing unit determines that the battery is in a second bulging state.
17. The control method of an electronic device according to claim 16, wherein the electronic device further comprises a power management unit, the power management unit is electrically connected to the battery, and the power management unit is used to reduce the The charging current of the battery or turning off the charging function of the battery, and the execution unit is the power management unit;

    The control unit, according to the bulge state determined by the detection processing unit, controls the execution unit to perform an early warning or protection operation corresponding to the bulge state, including:

    When the detection and processing unit determines that the battery is not in a bulging state, the control unit does not control the execution unit to perform warning and protection operations;

    When the detection processing unit determines that the battery is in the first bulging state, the control unit controls the execution unit to reduce the charging current of the battery;

    When the detection and processing unit determines that the battery is in the second bulging state, the control unit controls the execution unit to turn off the charging function of the battery.
18. The control method for an electronic device according to claim 15 or 16, wherein the execution unit is a capacitive touch display screen, and the control unit controls the execution unit to execute the bulge state determined by the detection processing unit. The warning or protection operations corresponding to the bulge state include:

    The control unit controls the execution unit to display graphics or text information corresponding to the bulge state according to the bulge state determined by the detection processing unit, and the graphics or text information is used to prompt the user about the bulge state of the battery or corresponding processing. suggestion.

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