CN117309958A - Battery bulge detection device, electronic equipment and battery bulge detection method - Google Patents

Battery bulge detection device, electronic equipment and battery bulge detection method Download PDF

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Publication number
CN117309958A
CN117309958A CN202311282437.4A CN202311282437A CN117309958A CN 117309958 A CN117309958 A CN 117309958A CN 202311282437 A CN202311282437 A CN 202311282437A CN 117309958 A CN117309958 A CN 117309958A
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China
Prior art keywords
battery
capacitance value
touch sensor
bulge
electrode
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杜松山
任志强
张宇
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Shanghai Chuanggong Telecom Technology Co Ltd
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Shanghai Chuanggong Telecom Technology Co Ltd
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Priority to CN202311282437.4A priority Critical patent/CN117309958A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/24—Investigating the presence of flaws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G01B7/22—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
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Abstract

The embodiment of the invention relates to the technical field of electronic equipment, and discloses a battery bulge detection device. The touch sensor is electrically connected with the plurality of first electrode plates, so that the change of capacitance values of different capacitances can be detected, and whether the battery bulges or not is judged according to the capacitance values. So set up, the electric capacity volume is less, simple structure can avoid damaging the battery. In addition, since there are a plurality of capacitors, it is possible to detect whether or not a bulge occurs at different positions of the battery. The embodiment of the invention also discloses electronic equipment and a battery bulge detection method.

Description

Battery bulge detection device, electronic equipment and battery bulge detection method
Technical Field
The embodiment of the invention relates to the technical field of electronic equipment, in particular to a battery bulge detection device, electronic equipment and a battery bulge detection method.
Background
Compared with traditional batteries such as lead-acid batteries, the lithium battery has higher energy density and lighter weight, and is widely applied in the fields of mobile electronic equipment, new energy automobiles and the like. The lithium metal battery has high technical threshold and high manufacturing cost, is difficult to popularize on a large scale, and gradually becomes a main stream product of the lithium battery. However, the lithium ion battery is inferior to the lithium metal battery in safety and self-discharge rate, and the lithium ion battery has a burning and explosion accident, which causes a great hidden trouble to the life and property safety of users.
In general, when a lithium ion battery is used for a long time or is influenced by an extreme environment (high temperature and high pressure), the lithium ion battery is easy to bulge and leak, and at this time, the probability of burning and explosion is greatly increased.
Disclosure of Invention
The invention aims to provide a battery bulge detection device, electronic equipment and a battery bulge detection method, which have simple structures and can detect whether bulges appear at different positions of a battery.
To solve the above technical problem, a first aspect of the present invention provides a battery bulge detecting device for detecting a battery bulge of an electronic device, including:
a plurality of first electrode plates which are arranged at intervals on one surface of the battery facing the rear shell of the electronic equipment; the second electrode plate is used for being fixed on one surface of the rear shell of the electronic equipment, which faces the battery, and is arranged opposite to the plurality of first electrode plates so as to form a plurality of capacitors; the touch sensor is electrically connected with the plurality of first electrode plates and is used for detecting the capacitance value of the capacitor and judging whether the battery bulges or not according to the capacitance value.
Optionally, the first electrode slice is a touch control film.
Optionally, the electronic device further comprises a flexible circuit board attached to the surface of the battery facing the rear shell of the electronic device, and the plurality of first electrode plates are metal foils exposed out of the flexible circuit board.
Optionally, the device further comprises a power supply, wherein the power supply is electrically connected with the second electrode slice and supplies power to the second electrode slice.
A second aspect of the present invention provides an electronic device comprising:
the device body, the processor and the battery bulge detection device according to the first aspect, wherein the device body comprises a battery compartment and a rear shell, the battery is arranged in the battery compartment, and the rear shell covers the battery compartment; the battery bulge detection device comprises a battery, a battery bulge detection device, a processor, a touch sensor and a processor, wherein the battery bulge detection device is arranged on the surface of the battery facing to a rear shell, the battery bulge detection device is arranged on the surface of the rear shell facing to the battery, the processor, the touch sensor and the processor of the battery bulge detection device are arranged on the equipment main body, and the processor is electrically connected with the touch sensor.
A third aspect of the present invention provides a battery bulge detection method applied to the battery bulge detection apparatus according to any one of the first aspects, comprising:
the touch sensor acquires a detection capacitance value between at least one first electrode plate and at least one second electrode plate, compares the magnitude relation between the detection capacitance value and a threshold value, and determines whether the battery bulges or not according to a comparison result.
Optionally, the touch sensor obtains a detection capacitance between at least one first electrode slice and at least one second electrode slice, compares a magnitude relation between the detection capacitance value and a threshold value, and determines whether the battery bulges according to a comparison result, specifically:
the touch sensor detects an initial capacitance value between the first electrode plate and the second electrode plate, and takes the initial capacitance value as a background noise; the touch sensor subtracts the initial capacitance value from the detected capacitance value to obtain an analysis capacitance value, and the touch sensor compares the analysis capacitance value with the threshold value to determine whether the battery bulges.
Optionally, the touch sensor detects an initial capacitance value between the first electrode plate and the second electrode plate, and takes the initial capacitance value as a background noise; the touch sensor subtracts the initial capacitance value from the detected capacitance value to obtain an analysis capacitance value, and the touch sensor compares the analysis capacitance value with the threshold value to determine whether the battery bulges or not; the method comprises the following steps:
the touch sensor detects initial capacitance values between the first electrode plate and the second electrode plate at different temperatures, and takes the initial capacitance values corresponding to the different temperatures as background noise at the different temperatures; the touch sensor subtracts the initial capacitance value at the corresponding temperature from the received detection capacitance value to obtain an analysis capacitance value at the corresponding temperature, and the touch sensor compares the analysis capacitance value at the corresponding temperature with the threshold value to determine whether the battery bulges or not.
Optionally, after the touch sensor compares the magnitude relation between the detected capacitance value and the threshold value, determining the battery bulge according to the comparison result, the method further includes:
the touch sensor acquires preset reference values corresponding to different distances between the first electrode plate and the second electrode plate, sequentially compares the detection capacitance value with an N preset reference value, and judges the severity level of the battery bulge according to the comparison result.
Optionally, before the touch sensor obtains the detected capacitance value between the at least one first electrode pad and the second electrode pad, the method further includes:
sequentially reducing the distance between the first electrode plate and the second electrode plate, sequentially detecting and recording capacitance values between the first electrode plate and the second electrode plate, and sequentially taking the capacitance values corresponding to different distances as a first preset reference value, a … and an Nth preset reference value, wherein N is an integer larger than 1.
Compared with the related art, the battery bulge detection device provided by the invention has the advantages that the plurality of first electrode plates are arranged on the surface of the battery facing the rear shell of the electronic equipment at intervals, the second electrode plates are arranged on the surface of the rear shell of the electronic equipment facing the battery, and the second electrode plates and the plurality of first electrode plates are arranged oppositely to form a plurality of capacitors. The touch sensor is electrically connected with the plurality of first electrode plates, so that the change of capacitance values of different capacitances can be detected, and whether the battery bulges or not is judged according to the capacitance values. So set up, the electric capacity volume is less, simple structure can avoid damaging the battery. In addition, since there are a plurality of capacitors, it is possible to detect whether or not a bulge occurs at different positions of the battery.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a schematic view of a first electrode and a touch sensor of a battery bulge detection device according to an embodiment of the present invention;
fig. 2 is a schematic view of a power supply and a second electrode sheet of a battery bulge detection device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a processor electrically connected to a touch sensor in accordance with one embodiment of the invention;
fig. 4 is a schematic diagram of a battery bulge detection method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a battery bulge detection method according to another embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present invention, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.
In the embodiments of the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate azimuth or positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
Currently, there are two main ways of detecting whether a battery bulges, one is to arrange a pressure sensor in a battery compartment, when the battery bulges, the volume of the battery is enlarged, the pressure sensor is extruded, the pressure sensor is stressed to detect that the battery bulges, however, the original space of the battery compartment is smaller, and the pressure sensor is additionally arranged, so that the battery is easy to be additionally extruded, and the battery is damaged; the other is to set up the detection circuitry including the sheet resistance in the battery compartment, when the battery takes place the swell, the battery makes the circuit that is connected with the sheet resistance switch on, changes the terminal voltage of sheet resistance, and then detects the battery and take place the swell, however, detection circuitry sets up comparatively complicated, and is difficult to carry out the classification to the swell state of battery.
To solve one or more of the above technical problems, an embodiment of the present invention provides a battery bulge detection device, including: a plurality of first electrode plates which are arranged at intervals on one surface of the battery facing the rear shell of the electronic equipment; the second electrode plate is used for being fixed on one surface of the rear shell of the electronic equipment, which faces the battery, and is arranged opposite to the plurality of first electrode plates so as to form a plurality of capacitors; the touch sensor is electrically connected with the plurality of first electrode plates and is used for detecting the capacitance value of the capacitor and judging whether the battery bulges or not according to the capacitance value.
One embodiment of the present invention also provides an electronic device, including: the battery bulge detection device comprises an equipment body, a processor and the battery bulge detection device, wherein the equipment body comprises a battery compartment and a rear shell, the battery is arranged in the battery compartment, and the rear shell covers the battery compartment; the battery bulge detection device comprises a battery, a processor, a battery bulge detection device and a touch sensor, wherein the battery bulge detection device is arranged on the surface of the battery facing the rear shell, the processor is arranged on the surface of the rear shell facing the battery, the touch sensor of the battery bulge detection device is arranged on the equipment main body, and the processor is electrically connected with the touch sensor.
An embodiment of the present invention further provides a battery bulge detecting method, which is applied to the battery bulge detecting device, including: the touch sensor acquires a detection capacitance value between at least one first electrode plate and at least one second electrode plate, compares the magnitude relation between the detection capacitance value and a threshold value, and determines whether the battery bulges or not according to a comparison result.
Compared with the related art, the battery bulge detection device provided by the invention has the advantages that the plurality of first electrode plates are arranged on the surface of the battery facing the rear shell of the electronic equipment at intervals, the second electrode plates are arranged on the surface of the rear shell of the electronic equipment facing the battery, and the second electrode plates and the plurality of first electrode plates are arranged oppositely to form a plurality of capacitors. The touch sensor is electrically connected with the plurality of first electrode plates, so that the change of capacitance values of different capacitances can be detected, and whether the battery bulges or not is judged according to the capacitance values. So set up, the electric capacity volume is less, simple structure can avoid damaging the battery. In addition, since there are a plurality of capacitors, it is possible to detect whether or not a bulge occurs at different positions of the battery.
The following details of implementation of the battery bulge detecting device according to the embodiment of the present invention are specifically described, and the following details are provided only for the convenience of understanding, and are not necessary to implement the present embodiment.
As shown in fig. 1 and 2, a battery bulge detecting apparatus according to an embodiment of the present invention includes: a plurality of first electrode sheets 101 arranged at intervals on a side of the battery 201 facing the rear case 202 of the electronic device; a second electrode pad 102, configured to be fixed to a side of a rear case 202 of the electronic device facing the battery, and disposed opposite to the plurality of first electrode pads 101 to form a plurality of capacitors; the touch sensor 103 is electrically connected to the plurality of first electrode pads 101, and the touch sensor 103 is configured to detect a capacitance value of the capacitor and determine whether the battery 201 bulges according to the capacitance value.
In the battery bulge detecting device according to the present embodiment, the touch sensor 103 may detect a change in capacitance value of different capacitances, and determine whether the bulge occurs in the battery 201 according to the capacitance value. So set up, the electric capacity volume is less, simple structure can avoid damaging battery 201. Further, since there are a plurality of the capacitors, it is possible to detect whether or not a bulge occurs at different positions of the battery 201.
It can be appreciated that the touch sensor 103 is a multi-channel touch sensor 103, and each channel thereof is electrically connected to one of the first electrode pads 101, so that signals of different first electrode pads 101 are received through different channels, and whether a bulge occurs at different positions on the battery 201 is detected.
In some embodiments, the first electrode pad 101 is a touch film. The thickness of the touch film is small, the sensitivity is high, the detection accuracy is high, and the swelling condition of the battery 201 can be accurately detected.
In still other embodiments, the battery bulge detecting device further includes a flexible circuit board 104 attached to a surface of the battery 201 facing the rear case 202 of the electronic device, and the plurality of first electrode pads 101 are metal foils exposed from the flexible circuit board 104.
Specifically, a part of the metal foil of the flexible circuit board 104 inside the electronic device is exposed, and this part of the metal foil is reused as the first electrode sheet 101, so that the number of components of the battery bulge detecting device can be reduced, the volume of the electronic device provided with the battery bulge detecting device can be reduced, and the manufacturing cost can be reduced.
It is understood that the touch sensor 103 is a capacitive sensor. In some embodiments, a sensor for detecting antenna power in an electronic device (such as a mobile terminal) may be multiplexed as a sensor for detecting battery bulge, so that the number of components of the battery bulge detecting apparatus may be reduced, and the construction of the electronic device using the battery bulge detecting apparatus may be simplified.
In some embodiments, the battery bulge detection device further comprises a power source 105, the power source 105 being electrically connected to the second electrode sheet 102 and supplying power to the second electrode sheet 102. Specifically, the power source 105 may be directly connected to the second electrode pad 102 through a wire, so that the plurality of first electrode pads 101 and the second electrode pad 102 constitute the capacitor.
In consideration of factors such as manufacturing cost and detection precision, the power supply 105 may be a 1.5V-2.0V micro power supply, so that the power supply does not occupy too much space inside the electronic device, and the capacitance value change caused by the change of the distance between the first electrode plate 101 and the second electrode plate 102 is relatively obvious and easy to detect.
It should be noted that, in the present invention, all the foregoing embodiments may be set separately, or may be combined arbitrarily according to the actual situation without collision, and the specific combination mode may be adjusted according to the actual requirement under the teaching of the present invention, which is not described herein.
An electronic device according to an embodiment of the present invention, as shown in fig. 3, includes: the device body, the processor 203 and the battery bulge detecting device, wherein the device body comprises a battery compartment and a rear shell 202, the battery 201 is arranged in the battery compartment, and the rear shell 202 covers the battery compartment; the first electrode piece 101 of the battery bulge detecting device is arranged on the surface of the battery 201 facing the rear shell 202, the processor 203 and the second electrode piece 102 of the battery bulge detecting device are arranged on the surface of the rear shell 202 facing the battery 201, the touch sensors 103 of the battery bulge detecting device are all arranged on the equipment main body, and the processor 203 is electrically connected with the touch sensors 103.
It can be understood that the electronic device of the present invention may be a mobile phone, a tablet computer, a notebook computer, an automobile, or other electronic devices using lithium batteries or equipped with lithium batteries, electronic control devices, or electronic control systems. When the electronic device is a car or other devices with a larger size, the specific setting of the battery bulge detecting device may be adaptively adjusted under the teaching of the present invention, for example, the size and power of the power source 105, the size, the number, the manufacturing materials, the specific setting mode, etc. of the first electrode sheet 101 and the second electrode sheet 102. Therefore, any adaptation based on the inventive concept according to the requirements of the practical application device should be within the scope of the present invention.
In some embodiments, the processor 203 may be a processor built in an electronic device, such as a CPU, etc., when the processor 104 detects that the battery 201 bulges, the touch sensor 103 sends a detection result to the processor 203, and the processor 203 may send a message to the user to alarm according to the detection result, so as to inform the user to deactivate the battery 201. If the processor 203 detects that the battery 201 is severely swelled, the internal circuit of the electronic device can be controlled to directly cut off the power supply of the battery 201, so as to ensure the safety of the user.
It should be noted that the processor 203 may control the power supply of the battery 201 by using a switching circuit, and the specific arrangement manner thereof may be set by those skilled in the art according to actual needs, which is not specifically described herein.
When the electronic device to which the battery bulge detecting apparatus is applied is a large-sized electronic control device or system such as an automobile, the rear case 202 refers to a support structure provided with respect to the battery 201 for supporting the second electrode sheet 102 so that the second electrode sheet 102 and the first electrode sheet 101 form a capacitor. In addition, when the whole volume of the electronic device is large, a plurality of second electrode pads 102 may be provided, each of the second electrode pads 102 is electrically connected to the power source 105, and the plurality of second electrode pads 102 and the plurality of first electrode pads are oppositely provided in a one-to-one correspondence manner so as to form a plurality of capacitors.
The battery bulge detection method according to an embodiment of the present invention, as shown in fig. 4, includes:
s100, the touch sensor 103 obtains a detection capacitance value C between at least one first electrode plate 101 and at least one second electrode plate 102 T And comparing the detected capacitance value C T And determining whether the battery 201 bulges according to the comparison result.
For S100, the touch sensor 103 obtains a detection capacitance value C between at least one first electrode piece 101 and a second electrode piece 102 T And comparing the magnitude relation between the detected capacitance CT and the threshold value, and determining whether the battery 201 bulges according to the comparison result, specifically:
the touch sensor 103 obtains a detection capacitance value C between at least one of the first electrode pad 101 and the second electrode pad 102 T Preferably, the touch sensor 103 acquires a detection capacitance value C between each of the first electrode pad 101 and the second electrode pad 102 T In order to detect whether the battery 201 bulges at different positions.
Further, the touch sensor 103 compares the detected capacitance value C T The relation of the magnitude of the threshold value according to the comparison resultWhether the battery 201 bulges or not is determined, specifically:
the touch sensor 103 detects the capacitance value C T And comparing with the threshold value. If the detected capacitance value C T If the threshold value is smaller, the battery 201 does not bulge; if the detected capacitance value C T Greater than or equal to the threshold value, a bulge occurs in the battery 201.
Specifically, if the battery 201 bulges, the volume of the battery 201 becomes larger, so that the distance between the first electrode tab 101 and the second electrode tab 102 decreases, and the capacitance value between the first electrode tab 101 and the second electrode tab 102 increases. Therefore, a threshold value can be preset according to the actual situation, when the detected capacitance value C T If the detected capacitance value C is greater than or equal to the threshold value, it can be determined that the battery 201 is bulged T And if the voltage is smaller than the threshold value, the battery is not bulged.
It will be appreciated that since there are a plurality of first electrode pads 101, a plurality of detection capacitance values C will be obtained during the comparison process T And sequentially comparing the detected values with the threshold values, and sequentially judging whether the battery 201 bulges at different positions.
When the lithium battery bulges, the bulge is most serious at the center of the bulge, the bulge is less at the periphery of the bulge, the bulge is most serious at the middle of the whole battery, and the bulge is less at the edge, so that different threshold values can be set for the first electrode sheet 101 at different positions. For example, the threshold value of the first electrode tab 101 at the middle of the battery may be greater than the threshold value of the first electrode tab 101 at the edge of the battery.
Further, the touch sensor 103 detects an initial capacitance value C between the first electrode pad 101 and the second electrode pad 102 0 The initial capacitance value C 0 As a background noise;
the touch sensor 103 detects the capacitance value C T Subtracting the initial capacitance value C 0 Obtaining the analysis capacitance value C A The touch sensor 103 compares the analysis capacitance value C A And the threshold value to determine whether the battery 201 bulges.
That is, in order to accurately determine whether the battery 201 bulges, the capacitance value between the first electrode tab 101 and the second electrode tab 102 is detected as the initial capacitance value C when the battery 201 does not bulge 0 Subtracting the initial capacitance value C before comparing 0 Obtaining the analysis capacitance value C A By comparing the differences, detection errors can be better avoided.
More specifically, since the same lithium battery may have a relatively significant difference in volume at different ambient temperatures, the touch sensor 103 detects the initial capacitance value C between the first electrode pad 101 and the second electrode pad 102 at different temperatures to ensure accuracy of the detection result 0 And will correspond to the initial capacitance value C of different temperatures 0 As the background noise at different temperatures;
the touch sensor 103 detects the capacitance value C T Subtracting the initial capacitance value C at the corresponding temperature 0 Obtaining an analysis capacitance value C at a corresponding temperature A The touch sensor 103 compares the analysis capacitance value C at the corresponding temperature A And the threshold value to determine whether the battery 201 bulges.
For example, the same lithium battery has a larger volume in a temperature environment of 60 ℃ than in a temperature environment of 30 ℃, which is a phenomenon due to the principle of thermal expansion and contraction, but practically neither of them bulges. Therefore, the same detection standard in the temperature environment of 30 ℃ is applied to the temperature environment of 60 ℃ to detect, possibly causing false alarm, based on which the initial capacitance value C between the first electrode pad 101 and the second electrode pad 102 can be detected in different temperature environments 0 Under different temperature environments, the detection capacitance value C is calculated T Deducting the initial capacitance value C at the corresponding temperature 0 And then comparingSo as to improve the accuracy of the detection result.
The battery bulge detecting method according to one embodiment of the present invention is an improvement of the battery bulge detecting method according to the previous embodiment, as shown in fig. 5, and the main improvement is that S200 is that the detected capacitance value C is compared with the touch sensor 103 T And the size relation of the threshold value, after determining the battery bulge according to the comparison result, further comprises:
the touch sensor 103 obtains preset reference values corresponding to different distances between the first electrode sheet 101 and the second electrode sheet 102, and the touch sensor 103 sequentially compares the detection capacitance values C T And the N preset reference value C N And judging the severity level of the battery bulge according to the comparison result.
Specifically, after the touch sensor 103 determines that the battery 201 bulges according to the comparison result, the touch sensor 103 further compares the analysis capacitance value C A And judging the severity level of the battery bulge according to the comparison result.
Generally, the slight bulge of the lithium battery will not affect the usage, and when the bulge of the lithium battery is serious, the lithium battery cannot be used or cannot be used continuously, so the bulge degree of the battery 201 can be classified according to the actual situation, such as no bulge, slight bulge, obvious bulge, serious bulge, and the like, different bulge grades correspond to different preset reference values, and when the analysis capacitance value C is determined A When the bulge is larger than or equal to one of the bulge degrees, the bulge is judged to be corresponding to the bulge degree. For example, when the analytical capacitance value C A When the detected result is greater than the preset reference value corresponding to the "obvious bulge", the touch sensor 103 determines that the battery 201 has obvious bulge, at this time, the touch sensor 103 may send the detected result including the classified result to the processor 203 of the electronic device, and then the detected result is presented to the user through the device main body by the processor 203, so that the user may deactivate the battery 201 according to the determined result, thereby avoiding danger; if the touch sensor 103 determines that the battery 201 has a serious bulge, the processor receives the touchAfter the detection result of the sensor 103, the processor may control the electronic device to directly cut off the power supply, so as to ensure safety.
It can be understood that the preset reference value may be set according to actual conditions before the battery bulge detecting device is put into use, specifically:
sequentially reducing the distance between the first electrode plate 101 and the second electrode plate 102, sequentially detecting and recording the capacitance values between the first electrode plate 101 and the second electrode plate 102, and sequentially taking the capacitance values corresponding to different distances as a first preset reference value C 1 …, nth preset reference value C N N is an integer greater than 1.
Specifically, when the battery 201 swells to different degrees, the distance between the first electrode sheet 101 and the second electrode sheet 102 is different. Based on this, the distance between the first electrode pad 101 and the second electrode pad 102 may be gradually reduced, representing an increasing severity of the battery 201, and the capacitance value between the first electrode pad 101 and the second electrode pad 102 at the corresponding distance may be sequentially detected and recorded. When the touch sensor 103 determines that the battery 201 bulges, the detection capacitance value C is set T Sequentially comparing with different preset reference values to obtain the swelling degree of the battery 201.
It will be appreciated that as in the previous embodiment, the volume of the lithium battery may be affected by ambient temperature, and therefore, the detected capacitance value C is compared T And the Nth preset reference value C N Before the touch sensor 103 can first detect the capacitance value C T And the Nth preset reference value C N Deducting the initial capacitance value C at the corresponding temperature 0 And then comparing.
In some embodiments, the first preset reference value C may be set 1 As the threshold value.
Likewise, considering that the swelling conditions of the battery at different positions are different, different N-th preset reference values C corresponding to the first electrode sheet 101 N Can alsoTo be set to different values according to actual conditions.
The battery bulge detection device, the electronic device and the battery bulge detection method according to the embodiments of the present invention have been described in detail, and specific examples are used herein to illustrate the principles and embodiments of the present invention, and the description of the above embodiments is only for aiding in understanding the concept of the present invention, and the description should not be construed as limiting the invention in any way.

Claims (10)

1. A battery bulge detection apparatus for detecting a battery bulge of an electronic device, comprising:
a plurality of first electrode plates which are arranged at intervals on one surface of the battery facing the rear shell of the electronic equipment;
the second electrode plate is used for being fixed on one surface of the rear shell of the electronic equipment, which faces the battery, and is arranged opposite to the plurality of first electrode plates so as to form a plurality of capacitors;
the touch sensor is electrically connected with the plurality of first electrode plates and is used for detecting the capacitance value of the capacitor and judging whether the battery bulges or not according to the capacitance value.
2. The battery bulge detection device of claim 1, wherein the first electrode sheet is a touch film.
3. The battery bulge detection device of claim 1, further comprising a flexible circuit board attached to a surface of the battery facing the rear case of the electronic device, wherein the plurality of first electrode pads are metal foils exposed from the flexible circuit board.
4. The battery bulge detection device of claim 1, further comprising a power source electrically connected to and supplying power to the second electrode sheet.
5. An electronic device, comprising a device body, a processor, and the battery bulge detection apparatus according to any one of claims 1 to 4, wherein the device body comprises a battery compartment and a rear case, the battery is disposed in the battery compartment, and the rear case covers the battery compartment; the battery bulge detection device comprises a battery, a battery body, a battery bulge detection device, a processor and a touch sensor, wherein the battery bulge detection device is arranged on the surface of the battery facing the rear shell, the battery bulge detection device is arranged on the surface of the rear shell facing the battery, the first electrode plate is arranged on the surface of the battery facing the rear shell, the second electrode plate is arranged on the surface of the rear shell facing the battery, the processor and the touch sensor of the battery bulge detection device are all arranged on the device body, and the processor is electrically connected with the touch sensor.
6. A battery bulge detecting method applied to the battery bulge detecting device according to any one of claims 1 to 4, comprising:
the touch sensor acquires a detection capacitance value between at least one first electrode plate and at least one second electrode plate, compares the magnitude relation between the detection capacitance value and a threshold value, and determines whether the battery bulges or not according to a comparison result.
7. The method for detecting battery bulge according to claim 6, wherein the touch sensor obtains a detected capacitance between at least one first electrode and at least one second electrode, compares a magnitude relation between the detected capacitance value and a threshold value, and determines whether the battery bulge according to a comparison result, specifically:
the touch sensor detects an initial capacitance value between the first electrode plate and the second electrode plate, and takes the initial capacitance value as a background noise;
the touch sensor subtracts the initial capacitance value from the detected capacitance value to obtain an analysis capacitance value, and the touch sensor compares the analysis capacitance value with the threshold value to determine whether the battery bulges.
8. The battery bulge detection method according to claim 7, wherein a touch sensor detects an initial capacitance value between the first electrode sheet and the second electrode sheet, and takes the initial capacitance value as a background noise; the touch sensor subtracts the initial capacitance value from the detection capacitance value to obtain an analysis capacitance value, and compares the analysis capacitance value with the threshold value to determine whether the battery bulges or not; the method comprises the following steps:
the touch sensor detects initial capacitance values between the first electrode plate and the second electrode plate at different temperatures, and takes the initial capacitance values corresponding to the different temperatures as background noise at the different temperatures;
the touch sensor subtracts the initial capacitance value at the corresponding temperature from the received detection capacitance value to obtain an analysis capacitance value at the corresponding temperature, and the touch sensor compares the analysis capacitance value at the corresponding temperature with the threshold value to determine whether the battery bulges or not.
9. The battery bulge detection method according to claim 6, wherein after the touch sensor compares the magnitude relation of the detection capacitance value with a threshold value, determining the battery bulge based on the comparison result, further comprising:
the touch sensor acquires preset reference values corresponding to different distances between the first electrode plate and the second electrode plate, sequentially compares the detection capacitance value with an N preset reference value, and judges the severity level of the battery bulge according to the comparison result.
10. The battery bulge detection method of claim 9, further comprising, before the touch sensor acquires the detected capacitance value between the at least one first electrode pad and the second electrode pad:
sequentially reducing the distance between the first electrode plate and the second electrode plate, sequentially detecting and recording capacitance values between the first electrode plate and the second electrode plate, and sequentially taking the capacitance values corresponding to different distances as a first preset reference value, a … and an Nth preset reference value, wherein N is an integer larger than 1.
CN202311282437.4A 2023-09-28 2023-09-28 Battery bulge detection device, electronic equipment and battery bulge detection method Pending CN117309958A (en)

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CN202311282437.4A CN117309958A (en) 2023-09-28 2023-09-28 Battery bulge detection device, electronic equipment and battery bulge detection method

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CN202311282437.4A CN117309958A (en) 2023-09-28 2023-09-28 Battery bulge detection device, electronic equipment and battery bulge detection method

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