Electronic device

Abstract

Embodiments of the present application provide an electronic device, aiming to improve the accuracy of judging whether the battery is swollen. The electronic device provided by the present application is that the electric reduction adhesive structure is located between the battery and the bottom wall of the battery compartment, the electric reduction adhesive structure comprises a first electrode layer and an electric reduction adhesive layer arranged in a stack, and a second electrode layer is located on the side of the electric reduction adhesive layer away from the first electrode layer. The first electrode layer, the electric reduction adhesive layer and the second electrode layer can be equivalent to a capacitor, and the first electrode layer and the second electrode layer are used to connect a capacitance detection device. When the battery is swollen, the swollen battery will squeeze the electric reduction adhesive layer, causing the thickness of the electric reduction adhesive layer to decrease, and the first electrode layer and the second electrode layer to approach each other. According to the capacitance formula, the capacitance of the capacitor equivalent to the first electrode layer, the electric reduction adhesive layer and the second electrode layer will increase, so that whether the battery is swollen can be judged. By measuring the capacitance value of the electric reduction adhesive layer, the accuracy of judging whether the battery is swollen can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to an electronic device. Background Technology

[0002] Electronic devices (such as mobile phones and tablets) typically need to monitor battery parameters such as voltage, capacity, and impedance to calculate whether the battery has swelled and to prevent potential hazards. However, indirect calculations using battery parameters such as voltage, capacity, and impedance are not accurate enough. Utility Model Content

[0003] This application provides an electronic device designed to improve the accuracy of determining whether a battery is swollen.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] This application provides an electronic device including a battery compartment, a battery, an electro-adhesive structure, and a second electrode layer. The battery compartment encloses a receiving cavity; the battery is disposed within the receiving cavity, with the plane of the battery parallel to the bottom wall of the battery compartment; the electro-adhesive structure is located between the battery and the bottom wall of the battery compartment, and the electro-adhesive structure includes a backing adhesive layer, a first electrode layer, and an electro-adhesive layer stacked together, with the backing adhesive layer bonded to the battery; the second electrode layer is located on the side of the electro-adhesive layer opposite to the first electrode layer, and the first electrode layer and the second electrode layer are used to connect a capacitance detection device.

[0006] The electronic device provided in this application includes a battery and an electrostatic adhesive structure disposed within a cavity enclosed by a battery compartment. The electrostatic adhesive structure is located between the battery and the bottom wall of the battery compartment. The electrostatic adhesive structure comprises a backing adhesive layer, a first electrode layer, and an electrostatic adhesive layer stacked together. The backing adhesive layer is bonded to the battery, and a second electrode layer is located on the side of the electrostatic adhesive layer facing away from the first electrode layer. The first electrode layer, the electrostatic adhesive layer, and the second electrode layer can be considered equivalent to a capacitor. The first electrode layer and the second electrode layer are used to connect a capacitance detection device. When the battery expands, the expanded battery will compress the electrostatic adhesive layer, causing the thickness of the electrostatic adhesive layer to decrease, bringing the first electrode layer and the second electrode layer closer together. According to the capacitance formula... It can be seen that the capacitance of the equivalent capacitor formed by the first electrode layer, the electro-adhesive layer, and the second electrode layer will increase, which can be used to determine whether the battery has expanded. Since the expansion of the battery will inevitably compress the electro-adhesive layer, resulting in a decrease in its thickness, measuring the capacitance value of the electro-adhesive layer can improve the accuracy of determining whether the battery has expanded. Here, C is the capacitance value of the equivalent capacitor formed by the first electrode layer, the electro-adhesive layer, and the second electrode layer; k is the dielectric constant of the electro-adhesive layer; s is the area of ​​the first and second electrode layers facing each other; and d is the distance between the first and second electrode layers.

[0007] In some embodiments, the projection of the electro-adhesive structure is curved or bent in a plane parallel to the plane of the battery.

[0008] By reducing the area of ​​the entire electrostatic adhesive layer through the above settings, the capacitance increases by a larger proportion as the thickness of the electrostatic adhesive layer decreases. This makes it easier for the capacitance detection device to identify changes in capacitance, thereby improving the accuracy of determining whether the battery is swollen.

[0009] In some embodiments, the electronic device includes at least two electro-adhesive structures, which are spaced apart in a plane parallel to the plane of the battery.

[0010] By using the above setup and detecting the capacitors of different electrostatic adhesive structures, the location of swelling on the battery can be determined.

[0011] In some embodiments, the battery compartment is made of a conductive material and serves as a second electrode layer.

[0012] With the above configuration, the battery compartment can be directly used as the second electrode layer. The capacitance of the electro-adhesive layer can be detected through the first electrode layer and the battery compartment. At the same time, there is no need to set a second electrode layer between the battery compartment and the electro-adhesive layer, which can reduce the size of the entire electronic device.

[0013] In some embodiments, the electronic device further includes a strain gauge structure, a first connecting line, and a second connecting line. The strain gauge structure is disposed between the bottom wall of the battery compartment and the battery. The first connecting line is connected to a first end of the strain gauge structure, and the second connecting line is connected to a second end of the strain gauge structure. The first connecting line and the second connecting line are used to connect a resistance detection device.

[0014] With the above setup, when the battery expands, the expanding battery will compress the strain gauge structure, causing the strain gauge structure to deform and its length to increase. According to the capacitance formula... It can be seen that the self-resistance of the strain gauge structure will increase, and thus...

[0015] This is used to determine if the battery has expanded. Since battery expansion inevitably compresses the strain gauge structure, increasing its length and resistance, measuring the resistance of the strain gauge structure can improve the accuracy of determining battery expansion. Here, R is the resistance of the strain gauge structure, ρ is the material density of the strain gauge structure, L is the length of the strain gauge structure, and s is the cross-sectional area of ​​the strain gauge structure.

[0016] In some embodiments, the projections of the strain gauge structure and the electro-adhesive structure are spaced apart in a plane parallel to the plane where the battery is located.

[0017] With the above configuration, the strain gauge structure and the electro-adhesive structure cover different locations on the battery. If the location on the battery corresponding to the strain gauge structure expands, it will compress the strain gauge structure, causing its length to increase and its resistance to increase. If the location on the battery corresponding to the electro-adhesive structure expands, it will compress the electro-adhesive layer within the electro-adhesive structure, causing its thickness to decrease and its capacitance to increase.

[0018] In some embodiments, the electro-adhesive structure surrounds the strain gauge structure in a plane parallel to the plane of the battery.

[0019] By setting up the above, the location of the strain gauge structure can be selectively planned. In other words, the strain gauge structure can be placed at the corresponding location where the battery is prone to expansion, which can improve the accuracy of detecting whether the battery is expanding.

[0020] In some embodiments, the strain gauge structure is disposed in the same layer as the first electrode layer.

[0021] In some embodiments, one end of the strain gauge structure is connected to the first electrode layer, and the other end of the strain gauge structure is also connected to the first electrode layer; both the first connecting line and the second connecting line are connected to the first electrode layer.

[0022] With the above configuration, both the first connecting line and the second connecting line are placed on the first electrode layer, which facilitates the connection of the first connecting line and the second connecting line with the strain gauge structure.

[0023] In some embodiments, there are multiple strain gauge structures, multiple first connecting lines, and multiple second connecting lines; each strain gauge structure has a first connecting line connected to its first end and a second connecting line connected to its second end.

[0024] With the above setup, the resistance detection device can detect whether each strain gauge structure has deformed based on different first and second connecting lines; and since the multiple strain gauge structures are located at different positions on the battery, it can specifically detect deformation at the corresponding position of the battery, thus improving the accuracy of detecting battery expansion.

[0025] In some embodiments, the projection of the strain gauge structure is curved or bent in a plane parallel to the plane where the battery is located.

[0026] By increasing the length of the strain gauge structure through the above settings, it becomes easier to detect the resistance change of the strain gauge structure through its deformation.

[0027] In some embodiments, in a plane parallel to the plane where the battery is located, a portion of the projection of the first connecting line is located outside the projection of the battery, and a portion of the projection of the second connecting line is located outside the projection of the battery.

[0028] The above setup facilitates the extraction of the strain gauge structure via the first and second connecting lines.

[0029] In some embodiments, in a plane parallel to the plane where the battery is located, the projection of the first connecting line is located within the projection of the battery, and the projection of the second connecting line is located within the projection of the battery.

[0030] The above design makes full use of the gaps in electronic devices where there are no electro-adhesive structures, thus improving the compactness of the electronic devices. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in some embodiments of this application will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this application.

[0032] Figure 1 This is a schematic diagram of the structure of the electronic device in the embodiments of this application. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the structure of the electronic device in the embodiments of this application. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the structure of the electronic device in the embodiments of this application. Figure 3 ;

[0035] Figure 4This is a schematic diagram of the electro-adhesive structure in the embodiments of this application;

[0036] Figure 5 This is a schematic diagram of the first and second electro-reducing adhesive structures in the embodiments of this application;

[0037] Figure 6 This is a schematic diagram of the structure of the first connecting line and the second connecting line in the embodiments of this application. Figure 1 ;

[0038] Figure 7 This is a schematic diagram of the structure in this application embodiment where the strain gauge is disposed between the first segment and the second segment;

[0039] Figure 8 This is a schematic diagram of the strain gauge structure in the embodiments of this application;

[0040] Figure 9 This is a schematic diagram of the structure of the first connecting line and the second connecting line in the embodiments of this application. Figure 2 ;

[0041] Figure 10 This is a schematic diagram of the structure of the first connecting line and the second connecting line in the embodiments of this application. Figure 3 ;

[0042] Figure 11 This is a schematic diagram of the structure of the first connecting line and the second connecting line in the embodiments of this application. Figure 4 ;

[0043] Figure 12 This is a schematic diagram of the strain gauge disposed on the electro-adhesive structure in an embodiment of this application.

[0044] Explanation of reference numerals in the attached drawings: 100, electronic device; 10, battery compartment; 20, electro-adhesive structure; 210, first segment; 220, second segment; 230, third segment; 201, first electro-adhesive structure; 202, second electro-adhesive structure; 21, backing layer; 22, first electrode layer; 23, electro-adhesive layer; 24, transition layer; 30, battery; 40, second electrode layer; 51, battery cover; 52, foam layer; 60, lead-out structure; 61, first lead-out structure; 62, second lead-out structure; 70, strain gauge structure; 71, first strain segment; 72, second strain segment; 73, third strain segment; 81, first connecting line; 82, second connecting line. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0047] Furthermore, in the embodiments of this application, directional terms such as "up," "down," "left," "right," "horizontal," and "vertical" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0048] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0049] It should be noted that, in the description of the embodiments of this application, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or an integral connection; they can also refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0050] Reference Figure 1 This application provides an electronic device 100, which may include devices such as mobile phones and tablets, and includes a battery 30. The electronic device 100 also includes a battery compartment 10, which encloses a receiving cavity, and the battery 30 is disposed in the receiving cavity.

[0051] Reference Figure 2The electronic device 100 also includes an electro-adhesive structure 20, which is also disposed within the accommodating cavity and located between the battery 30 and the bottom wall of the battery compartment 10. The electro-adhesive structure 20 includes a backing adhesive layer 21, a first electrode layer 22, and an electro-adhesive layer 23 stacked together. The backing adhesive layer 21 of the electro-adhesive structure 20 is bonded to the side of the battery 30 facing the bottom wall of the battery compartment 10. The first electrode layer 22 is located between the backing adhesive layer 21 and the electro-adhesive layer 23 to fix the relative position of the electro-adhesive structure 20 and the battery 30. The battery 30 is disposed in a plane parallel to the bottom wall of the battery compartment 10, that is, the plane where the battery 30 is located is parallel to the bottom wall of the battery compartment 10, so that in the electro-adhesive structure 20, the plane where the back adhesive layer 21 is located is parallel to the bottom wall of the battery compartment 10, the plane where the first electrode layer 22 is located is parallel to the bottom wall of the battery compartment 10, and the plane where the electro-adhesive layer 23 is located is parallel to the bottom wall of the battery compartment 10. The aforementioned electronic device 100 further includes a second electrode layer 40, which is located on the side of the electro-adhesive layer 23 facing away from the first electrode layer 22. Since the plane of the battery 30, the plane of the adhesive layer 21, the plane of the first electrode layer 22, and the plane of the electro-adhesive layer 23 are all parallel to the bottom wall of the battery compartment 10, the plane of the second electrode layer 40 is also parallel to the bottom wall of the battery compartment 10. This allows the first electrode layer 22, the electro-adhesive layer 23, and the second electrode layer 40 to be equivalent to a capacitor. The first electrode layer 22 and the second electrode layer 40 can be equivalent to the plates of a capacitor. The electro-adhesive layer 23 can be used to connect the first electrode layer 22 and the second electrode layer 40 to a capacitance detection device.

[0052] The electronic device 100 provided in this application includes a battery 30 and an electro-adhesive structure 20 disposed within a cavity enclosed by a battery compartment 10. The electro-adhesive structure 20 is located between the battery 30 and the bottom wall of the battery compartment 10. The electro-adhesive structure 20 includes a backing adhesive layer 21, a first electrode layer 22, and an electro-adhesive layer 23 stacked together. The backing adhesive layer 21 is bonded to the battery 30. A second electrode layer 40 is located on the side of the electro-adhesive layer 23 facing away from the first electrode layer 22. The first electrode layer 22, the electro-adhesive layer 23, and the second electrode layer 40 can be considered equivalent to a capacitor. The first electrode layer 22 and the second electrode layer 40 are used to connect a capacitance detection device. When the battery 30 expands, the expanded battery 30 will compress the electro-adhesive layer 23, causing the thickness of the electro-adhesive layer 23 to decrease, bringing the first electrode layer 22 and the second electrode layer 40 closer together. According to the capacitance formula... It can be seen that the capacitance of the equivalent capacitor formed by the first electrode layer 22, the electro-adhesive layer 23, and the second electrode layer 40 will increase, which can be used to determine whether the battery 30 has expanded. Since the expansion of the battery 30 will inevitably compress the electro-adhesive layer 23, resulting in a decrease in the thickness of the electro-adhesive layer 23, measuring the capacitance value of the electro-adhesive layer 23 can improve the accuracy of determining whether the battery 30 has expanded.

[0053] Wherein, C is the capacitance value of the capacitor formed by the first electrode layer 22, the electro-adhesive layer 23, and the second electrode layer 40, k is the dielectric constant of the electro-adhesive layer 23, s is the area of ​​the first electrode layer 22 and the second electrode layer 40 facing each other, and d is the distance between the first electrode layer 22 and the second electrode layer 40.

[0054] In some embodiments, the electronic device 100 further includes a battery cover 51, which together with the battery compartment 10 forms a receiving cavity. A foam layer 52 for vibration damping is provided between the battery 30 and the battery cover 51 to fill the gap between the battery 30 and the battery cover 51, thereby preventing the battery 30 and the battery cover 51 from colliding and also restricting the position of the battery 30 within the receiving cavity.

[0055] In some embodiments, a transition layer 24 is provided between the adhesive backing layer 21 and the first electrode layer 22 in the electro-adhesive structure 20. The transition layer 24 may include PET (polyethylene terephthalate), acrylic adhesive, etc. The first electrode layer 22 may include a conductive metal material such as aluminum. Since the adhesive backing layer 21 is an organic material and the metal material of the first electrode layer 22 is inorganic, providing the transition layer 24 between the adhesive backing layer 21 and the first electrode layer 22 can reduce the interfacial energy difference between them, thereby improving the adhesion between the adhesive backing layer 21 and the first electrode layer 22 and improving the uniformity of the formed first electrode layer 22. For example, in the electro-adhesive structure 20, the thickness of the adhesive backing layer 21 is 30 μm, the filter layer includes a 25 μm thick PET layer, a 5 μm thick acrylic adhesive layer, a 10 μm thick aluminum film, and a 30 μm thick electro-adhesive layer 23. Among them, the elastic deformation of the electro-adhesive layer 23 can reach 150%.

[0056] In some embodiments, the battery compartment 10 may be an insulating material, and the second electrode layer 40 located between the battery compartment 10 and the electro-adhesive layer 23 may include a metal material with conductive properties, so that the capacitance of the electro-adhesive layer 23 can be detected through the first electrode layer 22 and the second electrode layer 40.

[0057] In other embodiments, reference is made to Figure 3The battery compartment 10 can be made of a conductive material, such as aluminum alloy. By directly using the battery compartment 10 as the second electrode layer 40, the capacitance of the electro-adhesive layer 23 can be detected through the first electrode layer 22 and the battery compartment 10, while eliminating the need for a second electrode layer 40 between the battery compartment 10 and the electro-adhesive layer 23, thus reducing the size of the entire electronic device 100.

[0058] In some embodiments, refer to Figure 3 and Figure 4 The electronic device 100 also includes a lead-out structure 60, which is used to connect to the first electrode layer 22 in the electro-adhesive structure 20 to lead out the first electrode layer 22, thereby enabling the first electrode layer 22 to be connected to a capacitance detection device. The lead-out structure 60 can be connected to any position of the first electrode layer 22. In some embodiments, to facilitate the leading out of the first electrode layer 22, the lead-out structure 60 can be connected to a position of the first electrode layer 22 near the edge of the battery 30.

[0059] In some embodiments, the electro-adhesive structure 20 may completely cover one side surface of the battery 30. In other embodiments, refer to... Figure 3 , Figure 4 and Figure 5 The electro-adhesive structure 20 can cover a portion of one side surface of the battery 30; for example, the projection of the electro-adhesive structure 20 is curved or bent in a plane parallel to the plane where the battery 30 is located. Alternatively, the electronic device 100 includes at least two electro-adhesive structures 20, which are spaced apart in a plane parallel to the plane where the battery 30 is located. For example, the electro-adhesive structure 20 is divided into a first electro-adhesive structure 201 and a second electro-adhesive structure 202, both of which are attached to the battery 30 and spaced apart.

[0060] Reference Figure 3 and Figure 4 In an embodiment where the projection of the electro-reducing adhesive structure 20 is curved or bent, the electro-reducing adhesive structure 20 includes a first segment 210, a second segment 220, and a third segment 230. The first segment 210 and the third segment 230 extend along a first direction and are spaced apart along a second direction. The second segment 220 extends along a second direction, with the first segment 210 and the third segment 230 located on the same side of the second segment 220. One end of the second segment 220 is connected to one end of the first segment 210, and the other end of the second segment 220 is connected to one end of the third segment 230, thus making the electro-reducing adhesive structure 20 curved or bent in a plane. It is understood that the electro-reducing adhesive structure 20 may also include a fourth segment, a fifth segment, a sixth segment, etc., sequentially connected to the third segment 230, which will not be elaborated here.

[0061] In the above embodiment, the electro-adhesive structure 20 is curved or bent in a plane. That is, the electro-adhesive layer 23 is also curved or bent in its plane, which reduces the area of ​​the entire electro-adhesive layer 23. As the thickness of the electro-adhesive layer 23 decreases, the proportion of capacitance increase increases, which makes it easier for the capacitance detection device to identify the change in capacitance, thereby improving the accuracy of determining whether the battery 30 has expanded.

[0062] Reference Figure 3 and Figure 5 In an embodiment where the electro-adhesive structure 20 is divided into a first electro-adhesive structure 201 and a second electro-adhesive structure 202, the first electro-adhesive structure 201 may include the aforementioned backing adhesive layer 21, first electrode layer 22, and electro-adhesive layer 23; the second electro-adhesive structure 202 may also include the aforementioned backing adhesive layer 21, first electrode layer 22, and electro-adhesive layer 23. The first electro-adhesive structure 201 and the second electro-adhesive structure 202 respectively cover different locations on the battery 30. The first electro-adhesive structure 201 and the second electro-adhesive structure 202 are used to determine whether expansion has occurred at different locations on the battery 30.

[0063] For example, if expansion occurs at the location on the battery 30 corresponding to the first electro-adhesive structure 201, it will compress the electro-adhesive layer 23 in the first electro-adhesive structure 201, resulting in a decrease in the thickness of the electro-adhesive layer 23 and an increase in its capacitance. Similarly, if expansion occurs at the location on the battery 30 corresponding to the second electro-adhesive structure 202, it will compress the electro-adhesive layer 23 in the second electro-adhesive structure 202, resulting in a decrease in the thickness of the electro-adhesive layer 23 and an increase in its capacitance. Through this configuration, the location of expansion on the battery 30 can be determined by detecting the capacitance of different electro-adhesive structures 20. It is understandable that the electro-adhesive structure 20 can be further divided into a third electro-adhesive structure, a fourth electro-adhesive structure, etc., wherein the first electro-adhesive structure 201, the second electro-adhesive structure 202, the third electro-adhesive structure, and the fourth electro-adhesive structure are all arranged at intervals and are all attached to the battery 30.

[0064] In embodiments where the electro-adhesive structure 20 is divided into a first electro-adhesive structure 201 and a second electro-adhesive structure 202, the first electro-adhesive structure 201 may also be curved or bent in its plane; the second electro-adhesive structure 202 may also be curved or bent in its plane.

[0065] In embodiments where the electronic device 100 includes a lead-out structure 60, in conjunction with the implementation of the electro-adhesive structure 20 being divided into a first electro-adhesive structure 201 and a second electro-adhesive structure 202, the lead-out structure 60 can also be divided into a first lead-out structure 61 and a second lead-out structure 62 that are independent of each other. The first lead-out structure 61 is connected to the first electrode layer 22 in the first electro-adhesive structure 201 so as to lead out the first electrode layer 22 in the first electro-adhesive structure 201 through the first lead-out structure 61; the second lead-out structure 62 is connected to the second electrode layer 40 in the second electro-adhesive structure 202 so as to lead out the first electrode layer 22 in the second electro-adhesive structure 202 through the second lead-out structure 62.

[0066] In some embodiments, refer to Figure 6 The electronic device 100 also includes a strain gauge structure 70, which is disposed between the bottom wall of the battery compartment 10 and the battery 30. The strain gauge structure 70 is a long strip structure or a curved long strip structure, having a first end and a second end. The electronic device 100 also includes a first connecting line 81 and a second connecting line 82 connected to the strain gauge structure 70. The first connecting line 81 is connected to the first end of the strain gauge structure 70, and the second connecting line 82 is connected to the second end of the strain gauge structure 70. The first connecting line 81 and the second connecting line 82 are used to connect a resistance detection device. For example, the first connecting line 81 is configured to provide a positive voltage to the strain gauge structure 70, and the second connecting line 82 is configured to provide a negative voltage to the strain gauge structure 70 to achieve the measurement of the resistance of the strain gauge structure 70. With the above configuration, when the battery 30 expands, the expanded battery 30 will compress the strain gauge structure 70, causing the strain gauge structure 70 to deform and its length to increase. According to the capacitance formula... It can be seen that the self-resistance of strain gauge structure 70 will increase, which can be used to determine whether battery 30 is...

[0067] Expansion. Since the expansion of battery 30 will inevitably compress strain gauge structure 70, leading to an increase in the length and resistance of strain gauge structure 70, measuring the resistance value of strain gauge structure 70 can improve the accuracy of determining whether battery 30 has expanded. Where R is the resistance value of strain gauge structure 70, ρ is the material density of strain gauge structure 70, L is the length of strain gauge structure 70, and s is the cross-sectional area of ​​strain gauge structure 70.

[0068] In some embodiments, refer to Figure 7The strain gauge structure 70 can be independently disposed from the aforementioned electro-adhesive structure 20. In some embodiments, the projections of the strain gauge structure 70 and the electro-adhesive structure 20 are spaced apart in a plane parallel to the plane of the battery 30, that is, the strain gauge structure 70 and the electro-adhesive structure 20 respectively cover different positions on the battery 30. If the position on the battery 30 corresponding to the strain gauge structure 70 expands, it will compress the strain gauge structure 70, resulting in an increase in the length of the strain gauge structure 70 and an increase in the resistance of the strain gauge structure 70; if the position on the battery 30 corresponding to the electro-adhesive structure 20 expands, it will compress the electro-adhesive layer 23 in the electro-adhesive structure 20, resulting in a decrease in the thickness of the electro-adhesive layer 23 in the electro-adhesive structure 20 and an increase in the capacitance of the electro-adhesive layer 23 in the electro-adhesive structure 20.

[0069] In the above embodiments, where the projection of the electro-adhesive structure 20 is curved or bent, the strain gauge structure 70 can be disposed in the interval between the first segment 210 and the third segment 230. In embodiments where the electro-adhesive structure 20 is divided into a first electro-adhesive structure 201 and a second electro-adhesive structure 202, the strain gauge structure 70 can be disposed between the first electro-adhesive structure 201 and the second electro-adhesive structure 202.

[0070] In the above embodiments, the strain gauge structure 70 may include a resistance strain gauge, which is a sensor that converts the mechanical strain on the surface of a specimen into a change in resistance based on the strain effect of metal.

[0071] In other embodiments, the strain gauge structure 70 may also be disposed on the electro-adhesive structure 20, that is, the electro-adhesive structure 20 surrounds the strain gauge structure 70 in a plane parallel to the plane where the battery 30 is located. The strain gauge structure 70 may include a resistance strain gauge, which can be directly disposed on the electro-adhesive structure 20; or the strain gauge structure 70 may be formed within the electro-adhesive structure 20. Through the above arrangement, the position of the strain gauge structure 70 can be selectively planned, that is, the strain gauge structure 70 can be disposed at corresponding positions where the battery 30 is prone to expansion, which facilitates the improvement of the accuracy of detecting whether the battery 30 has expanded.

[0072] Reference Figure 6 and Figure 8In the embodiment where the strain gauge structure 70 is formed in the electro-adhesive structure 20, a portion of the electro-adhesive structure 20 can be removed by laser engraving to form the strain gauge structure 70. In a plane parallel to the plane of the battery 30, the projection of the strain gauge structure 70 is curved or bent. The strain gauge structure 70 includes a first strain segment 71, a second strain segment 72, and a third strain segment 73. The first strain segment 71 and the third strain segment 73 extend along a second direction and are spaced apart along a first direction. The second strain segment 72 extends along a first direction, and the first strain segment 71 and the third strain segment 73 are located on the same side of the second strain segment 72. One end of the second strain segment 72 is connected to one end of the first strain segment 71, and the other end of the second strain segment 72 is connected to one end of the third strain segment 73. This makes the strain gauge structure 70 curved or bent in a plane, thereby increasing the length of the strain gauge structure 70 and facilitating the detection of the resistance change of the strain gauge structure 70 through its deformation.

[0073] In some implementations, refer to Figure 3 and Figure 6 The removal of part of the electro-adhesive structure 20 may include the removal of part of the backing adhesive layer 21, part of the first electrode layer 22, and part of the electro-adhesive layer 23. That is, the removal of part of the electro-adhesive structure 20 is to penetrate the entire electro-adhesive structure 20, and a strain gauge structure 70 is formed on the electro-adhesive structure 20.

[0074] In other embodiments, reference is made to... Figure 3 and Figure 6 Removing part of the electro-adhesive structure 20 can be done by removing only part of the first electrode layer 22, and forming the strain gauge structure 70 only on the first electrode layer 22, that is, the strain gauge structure 70 and the first electrode layer 22 are set in the same layer.

[0075] In the above embodiments, a portion of the first electrode layer 22 is removed to form a strain gauge structure 70, so that both the first end and the second end of the formed strain gauge structure 70 are connected to the first electrode layer 22. The first connecting line 81 and the second connecting line 82 used to connect to the strain gauge structure 70 can both be connected to the first electrode layer 22. That is, the first connecting line 81 is connected to the first end of the strain gauge structure 70 through the first electrode layer 22, and the second connecting line 82 is connected to the second end of the strain gauge structure 70 through the first electrode layer 22. Since the size of the first electrode layer 22 is significantly larger than the size of the strain gauge structure 70, the first connecting line 81 and the second connecting line 82 are both disposed on the first electrode layer 22 to facilitate the connection of the first connecting line 81 and the second connecting line 82 with the strain gauge structure 70.

[0076] In some embodiments, refer to Figure 6 and Figure 9Multiple strain gauge structures 70 can be provided, spaced apart, and each strain gauge structure 70 can be placed at a location where the battery 30 is prone to expansion, thereby improving the accuracy of detecting whether the battery 30 is expanding. The strain gauge structures 70 are mounted on the electro-adhesive structure 20, which is curved or bent; therefore, multiple strain gauge structures 70 can be sequentially arranged along the curved or bent path of the electro-adhesive structure 20.

[0077] In the above embodiments, referring to Figure 3 and Figure 9 The electronic device 100 may include only one first connecting line 81 and one second connecting line 82. Since the electro-adhesive structure 20 is curved or bent, the first electrode layer 22 within the electro-adhesive structure 20 is also curved or bent. The first connecting line 81 is connected to one end of the first electrode layer 22, and the second connecting line 82 is connected to the other end of the first electrode layer 22. Multiple strain gauge structures 70 are sequentially located along the curved or bent path of the first electrode layer 22 and are all connected to the first electrode layer 22. The multiple strain gauge structures 70 are arranged in series between the first connecting line 81 and the second connecting line 82, with one first connecting line 81 and one second connecting line 82 providing voltage to all strain gauge structures 70. With this configuration, as long as one of the multiple strain gauge structures 70 deforms, the resistance detection device can detect the change in resistance through the first connecting line 81 and the second connecting line 82.

[0078] In the above embodiments, referring to Figure 3 and Figure 6 The electronic device 100 may also include multiple first connecting lines 81 and multiple second connecting lines 82. Multiple strain gauge structures 70 are sequentially located on a curved or bent path of the first electrode layer 22 and are all connected to the first electrode layer 22. The first end of each strain gauge structure 70 is connected to a corresponding first connecting line 81, and the second end of each strain gauge structure 70 is connected to a corresponding second connecting line 82. The first connecting line 81 and the second connecting line 82 connected to the same strain gauge structure 70 provide voltage to the strain gauge structure 70 connected to it. With the above configuration, the resistance detection device can detect whether each strain gauge structure 70 has deformed based on different first connecting lines 81 and second connecting lines 82; and because the multiple strain gauge structures 70 have different corresponding positions on the battery 30, it can specifically detect deformation at corresponding positions of the battery 30, improving the accuracy of detecting battery expansion.

[0079] In this configuration, within a plane parallel to the plane containing the battery 30, a portion of the projection of the first connecting line 81 lies outside the projection of the battery 30; similarly, a portion of the projection of the second connecting line 82 also lies outside the projection of the battery 30. For example, the first connecting line 81 and the second connecting line 82 can be connected to the edge of the first electrode layer 22 near the battery 30. This arrangement facilitates the extraction of the strain gauge structure 70 via the first connecting line 81 and the second connecting line 82.

[0080] Or, refer to Figure 10 and Figure 11 In a plane parallel to the plane containing battery 30, the projection of the first connecting line 81 lies entirely within the projection of battery 30; the projection of the second connecting line 82 also lies entirely within the projection of battery 30. For example, refer to... Figure 10 In embodiments where the electro-adhesive structure 20 is curved or bent, the first connecting line 81 and the second connecting line 82 are located between the first segment 210 and the third segment 230; refer to Figure 11 In an embodiment where the electro-adhesive structure 20 is divided into a first electro-adhesive structure 201 and a second electro-adhesive structure 202, the first connecting line 81 and the second connecting line 82 are located between the first electro-adhesive structure 201 and the second electro-adhesive structure 202. This arrangement fully utilizes the space in the electronic device 100 where the electro-adhesive structure 20 is not located, improving the compactness of the electronic device 100.

[0081] In the above embodiments, refer to Figure 12 The strain gauge structure 70 can be disposed on at least one of the first segment 210, the second segment 220, and the third segment 230 of the electro-adhesive structure 20.

[0082] If the strain gauge structure 70 is disposed on the first segment 210, in the second direction, the overall size of the strain gauge structure 70 is smaller than the size of the first segment 210 in the second direction. That is, in the second direction, there are portions of the first electrode layer 22 on both sides of the strain gauge structure 70. The strain gauge structure 70 is surrounded by the first electrode layer 22, which can increase the continuity of the first electrode layer 22, improve the connection strength of the first electrode layer 22, and prevent the first electrode layer 22 from breaking to form an open circuit.

[0083] If the strain gauge structure 70 is disposed on the first segment 210, in the second direction, the overall size of the strain gauge structure 70 is equal to the size of the first segment 210 in the second direction. That is to say, in the second direction, there are no first electrode layers 22 on both sides of the strain gauge structure 70, which can increase the size of the strain gauge structure 70 and improve the accuracy of the strain gauge structure 70 in detecting whether the battery 30 is expanding.

[0084] Furthermore, if the strain gauge structure 70 is disposed on the second segment 220, the overall size of the strain gauge structure 70 in the first direction is less than or equal to the size of the second segment 220 in the first direction. If the strain gauge structure 70 is disposed on the third segment 230, the overall size of the strain gauge structure 70 in the second direction is less than or equal to the size of the third segment 230 in the second direction. The beneficial effects of the constraint on the size of the strain gauge structure 70 are similar to those described above and will not be repeated here.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electronic device, characterized in that, include: Battery compartment, wherein the battery compartment is enclosed to form a receiving cavity; A battery is disposed within the accommodating cavity, and the plane of the battery is parallel to the bottom wall of the battery compartment. An electro-adhesive structure is located between the battery and the bottom wall of the battery compartment. The electro-adhesive structure includes a backing adhesive layer, a first electrode layer, and an electro-adhesive layer stacked together. The backing adhesive layer is bonded to the battery. The second electrode layer is located on the side of the electro-adhesive layer opposite to the first electrode layer. The first electrode layer and the second electrode layer are used to connect the capacitance detection device.

2. The electronic device according to claim 1, characterized in that, In a plane parallel to the plane of the battery, the projection of the electro-adhesive structure is curved or bent.

3. The electronic device according to claim 1, characterized in that, The electronic device includes at least two of the electro-adhesive structures, which are spaced apart in a plane parallel to the plane of the battery.

4. The electronic device according to any one of claims 1-3, characterized in that, The battery compartment is made of a conductive material and serves as the second electrode layer.

5. The electronic device according to any one of claims 1-4, characterized in that, The electronic device further includes a strain gauge structure, a first connecting line, and a second connecting line. The strain gauge structure is disposed between the bottom wall of the battery compartment and the battery. The first connecting line is connected to a first end of the strain gauge structure, and the second connecting line is connected to a second end of the strain gauge structure. The first connecting line and the second connecting line are used to connect a resistance detection device.

6. The electronic device according to claim 5, characterized in that, In a plane parallel to the plane where the battery is located, the projection of the strain gauge structure and the projection of the electro-adhesive structure are spaced apart.

7. The electronic device according to claim 5, characterized in that, In a plane parallel to the plane where the battery is located, the electro-adhesive structure surrounds the strain gauge structure.

8. The electronic device according to claim 7, characterized in that, The strain gauge structure is disposed in the same layer as the first electrode layer.

9. The electronic device according to claim 7 or 8, characterized in that, One end of the strain gauge structure is connected to the first electrode layer, and the other end of the strain gauge structure is also connected to the first electrode layer; both the first connecting line and the second connecting line are connected to the first electrode layer.

10. The electronic device according to any one of claims 5-9, characterized in that, The strain gauge structure is provided in multiple ways, the first connecting line is provided in multiple ways, and the second connecting line is provided in multiple ways; each strain gauge structure has a first connecting line connected to its first end and a second connecting line connected to its second end.

11. The electronic device according to any one of claims 5-10, characterized in that, In a plane parallel to the plane where the battery is located, the projection of the strain gauge structure is curved or bent.

12. The electronic device according to any one of claims 5-11, characterized in that, In a plane parallel to the plane where the battery is located, a portion of the projection of the first connecting line is located outside the projection of the battery, and a portion of the projection of the second connecting line is located outside the projection of the battery.

13. The electronic device according to any one of claims 5-11, characterized in that, In a plane parallel to the plane where the battery is located, the projection of the first connecting line is located within the projection of the battery, and the projection of the second connecting line is located within the projection of the battery.

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