TWM645641U - Electronic device - Google Patents

Abstract

An electronic device includes a structural component, a lithium battery, and a second conductive layer. The structural component forms a container space. The lithium battery is located in the container space and includes a battery core and an encapsulating film, wherein the battery core has a first conductive layer, and the encapsulating film surrounds the battery core. The second conductive layer is disposed at the structural component or the encapsulating film, and the first conductive layer is electrically isolated from the second conductive layer.

Description

electronic device

This case is about an electronic device.

Currently, lithium batteries in electronic devices often deform as they are used over time. For example, due to the electrochemical reaction mechanism of the insertion or extraction of lithium ions in the lithium battery, the cells will expand during charging and discharge. Shrinkage will occur when the battery is used. Due to the material characteristics of the battery, it will often bulge and deform when it gradually ages. Or, when abnormal conditions (such as external or internal short circuit or external force damage) occur, material decomposition and chemical reactions will occur inside the battery. The gas produced by the reaction or the encapsulating film will be damaged or corroded, allowing external water vapor to enter the battery. As a result, bulging and deformation will also occur. In addition, when the encapsulating film is subjected to external force, it will also be extruded and deformed. , these situations will damage the appearance of the electronic device (such as the bulging of the notebook computer case). Not only that, when the above-mentioned deformation reaches a certain degree, it may even cause safety risks, such as explosion or burning and other dangerous situations. Therefore, how to improve electronic devices to enhance their security is actually a challenge.

This case provides an electronic device, including a structural component, a lithium battery and a second conductive layer. Structural components form accommodation spaces. The lithium battery is located in the accommodation space and includes an electric core and an encapsulating film, wherein the electric core has a first conductive layer and the encapsulating film surrounds the electric core. The second conductive layer is disposed on the structural component or the encapsulation film, and the first conductive layer and the second conductive layer are electrically isolated.

Based on the above, this project uses a first conductive layer (located in the cell of a lithium battery) and a second conductive layer in an electronic device as a capacitance detection structure. In this way, when the lithium battery deforms, it can be used to detect The deformation degree is known from the capacitance change caused by the change in the distance between the two conductive layers, and the status of the electronic device can be monitored in real time, and relevant safety measures can be taken in a timely manner. Therefore, the electronic device in this case can effectively improve its safety.

10: First external terminal

20: Second external terminal

30: Positive ear

40: Negative ear

100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H: electronic devices

101: Upper side

102: Lower side

103: Zhou side

110: Structural parts

112: Accommodation space

120, 120A, 120B, 120C, 120D, 120E, 120F, 120G, 120H: lithium battery

121, 121a, 121b: Battery core

122: Encapsulation film

123, 123a, 123b, 123c, 123d, 123e: first conductive layer

124:Positive pole piece

125: Negative pole piece

126:Insulation layer

130: Second conductive layer

1A, 1B, 1C, 1D, 1E, 1F, 1G, and 1H are schematic structural diagrams of electronic devices according to some embodiments of the present invention.

FIG. 1I is a schematic top view of a lithium battery according to some embodiments of the present invention.

2A and 2B are schematic diagrams of the monitoring flow of an electronic device according to some embodiments of the present application.

3A, 3B, 3C, 3D, 3E, 3F, 3G, and 3H are schematic diagrams of the first conductive layer in the cell of a lithium battery according to some embodiments of the present application.

4A and 4B are schematic diagrams of the pole piece and the first conductive layer of a lithium battery cell according to some embodiments of the present application.

In the following detailed description, for purposes of illustration and not limitation, example embodiments are set forth disclosing specific details in order to provide a thorough understanding of the various principles of the present invention. However, it will be apparent to one of ordinary skill in the art, having benefit from the present disclosure, that the present invention may be practiced in other embodiments that depart from the specific details disclosed herein. In addition, descriptions of well-known components (such as electrolytes, isolation membranes), methods, and materials may be omitted to avoid obscuring the description of various principles of the present invention.

Please refer to Figure 1A of this case. The electronic device 100A provided in this case includes a structural member 110 and a lithium battery 120. The structural member 110 forms an accommodating space 112. The lithium battery 120 is located in the accommodating space 112 and includes a battery core 121 and a package. Seal film 122.

The battery core 121 in this case has a first conductive layer 123, and an encapsulation film 122 surrounds the battery core 121. On the other hand, the electronic device 100A further includes a second conductive layer 130 disposed on the structural component 110 or the encapsulating film 122, and the first conductive layer 123 and the second conductive layer 130 are electrically isolated.

In one embodiment, the battery core 121 is a polymer lithium battery core, and the first conductive layer 123 and the second conductive layer 130 can be made of any suitable conductive material.

Please refer to Figure 2A and Figure 2B. First, the deformation of the lithium battery can be detected through the conductive layer. The detection method can be to electrically couple the two conductive layers to the detector. (sensor) to obtain the capacitance. Then, the detector can be electrically coupled to a control module including a processing chip to determine the degree of deformation (expansion or extrusion) of the lithium battery. When it is determined that the degree of deformation of the lithium battery exceeds a preset condition (such as capacitance) When the capacitance exceeds the first value), the voltage/current state of the lithium battery is adjusted (as shown in Figure 2A), and when it is judged that the deformation degree of the lithium battery exceeds the preset condition 2 (such as the capacitance exceeding the second value), The lithium battery cannot be charged or discharged, and the electronic product is controlled to display a message for replacing the lithium battery (as shown in Figure 2B). The corresponding value can be determined according to the actual design requirements and can be preset in the control module. , but this case is not limited to this.

In some embodiments, adjusting the voltage/current state of the lithium battery may be to reduce the full charge voltage of the lithium battery, reduce the charging cut-off current of the lithium battery, or other appropriate control actions.

Please refer to FIG. 1A and FIG. 1I. In this embodiment, the lithium battery 120 further includes a first external terminal 10 and a second external terminal 20, wherein the first external terminal 10 and the second external terminal 20 are electrically connected to the third external terminal respectively. A conductive layer 123 and a second conductive layer 130. Furthermore, the first external terminal 10 extends out of the encapsulating film 122, and the second external terminal 20 extends out of the encapsulating film 122 or the structural member 110, but the present case is not limited thereto. Here, the lithium battery 120 further includes a positive electrode tab 30 and a negative electrode tab 40 adjacent to the first external terminal 10 and the second external terminal 20 as contact points when the lithium battery 120 is charged and discharged.

Referring to FIG. 1A , the battery core 121 has an upper side 101 , a lower side 102 , and a peripheral side 103 between the upper side 101 and the lower side 102 . In this embodiment, the second conductive layer 130 is disposed in the encapsulation film 122 The side is adjacent to the upper side 101, but this case is not limited to this.

Referring to FIG. 1B , the second conductive layer 130 of the electronic device 100B of this embodiment is disposed on the inner side of the encapsulation film 122 and adjacent to the lower side 102 , but the case is not limited thereto.

Referring to FIG. 1C , the second conductive layer 130 of the electronic device 100C of this embodiment is disposed on the outer side of the encapsulating film 122 and adjacent to the upper side 101 , but the case is not limited thereto.

Referring to FIG. 1D , the second conductive layer 130 of the electronic device 100D of this embodiment is disposed on the outer side of the encapsulation film 122 and adjacent to the lower side 102 , but the case is not limited thereto.

Referring to FIG. 1E , the second conductive layer 130 of the electronic device 100E of this embodiment is disposed in the encapsulation film 122 and adjacent to the upper side 101 , but the case is not limited thereto.

Referring to FIG. 1F , the second conductive layer 130 of the electronic device 100F of this embodiment is enclosed in the film 122 and adjacent to the lower side 102 , but the case is not limited thereto.

Referring to FIG. 1G , the second conductive layer 130 of the electronic device 100G of this embodiment is disposed on the inner side of the structural member 110 and adjacent to the upper side 101 , but the case is not limited thereto.

Referring to FIG. 1H , the second conductive layer 130 of the electronic device 100H of this embodiment is disposed on the inner side of the structural member 110 and adjacent to the lower side 102 , but the case is not limited thereto.

Please refer to FIG. 3A. In one embodiment, the battery core 121a of the lithium battery 120A is formed by a rolled process, and its shape is oval, and the first conductive layer 123a is located on the upper side 101 of the battery core 121a and Complying with the shape of the battery core 121a is an arc shape, but the present case is not limited to this.

Please refer to FIG. 3B. The first conductive layer 123a of the lithium battery 120B in this embodiment is located on the lower side 102 of the battery core 121a, but the present case is not limited thereto.

Please refer to FIG. 3C. The first conductive layer 123b of the lithium battery 120C in this embodiment has a closed ring structure, but the present case is not limited to this.

Please refer to FIG. 3D. The first conductive layer 123c of the lithium battery 120D of this embodiment is rectangular, and the battery core 121b is a square battery core formed by a stacked process. In addition, the battery core 121b can also be further manufactured using a winding process, but this case is not limited to this.

Please refer to FIG. 3E. The first conductive layer 123c of the lithium battery 120E of this embodiment is located on the lower side 102 of the battery core 121a, but the case is not limited thereto.

Please refer to FIG. 3F. The lithium battery 120F of this embodiment further includes another first conductive layer 123c located on the lower side 102 of the battery core 121a, but the case is not limited thereto.

Please refer to FIG. 3G. The first conductive layer 123d of the lithium battery 120G in this embodiment has a closed ring structure, but the present case is not limited to this.

Please refer to FIG. 3H. The first conductive layer 123e of the lithium battery 120H in this embodiment is composed of multiple units, but the present case is not limited thereto.

It should be noted that although the first conductive layers of the above various aspects are all located on the upper side and/or the lower side, in embodiments not shown, the first conductive layers of the above various aspects can also be located on the peripheral side. In other words, the first conductive layer in the above various forms can be located on the upper side, lower side or peripheral side of the battery core according to actual design requirements. In addition, the winding process and the stacking process have the same meanings that are generally understood by those of ordinary skill in the field to which this case belongs, and will not be described again here.

Please refer to FIG. 4A. In this embodiment, the battery core 121 includes a positive electrode piece 124 and a negative electrode piece 125, and the first conductive layer 123 is adjacent to the negative electrode piece 125 and has an insulating layer 126 on its top and bottom sides. However, the present case is not limited to this. Please refer to FIG. 4B . In another embodiment, the first conductive layer 123 is adjacent to the positive electrode piece 124 .

Furthermore, the insulating layer 126 (dashed line part) on the top side of the first conductive layer 123 is optional, that is, no insulating layer may be provided on the top side. In addition, the insulating layer 126 can be an isolation film or a solid electrolyte, and the positive electrode piece 124 and the negative electrode piece 125 can be made of any suitable electrode piece material.

To sum up, in this case, the first conductive layer (located in the cell of the lithium battery) and the second conductive layer are provided in the electronic device as a capacitance detection structure. In this way, when the lithium battery deforms, The degree of deformation can be known through the change in capacitance caused by the change in the distance between the two conductive layers, and the status of the electronic device can be monitored in real time, and relevant safety measures can be taken in a timely manner. Therefore, the electronic device in this case can effectively improve its safety. sex.

Although this case has been disclosed as above using embodiments, they are not intended to limit this case. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of this case. Therefore, the protection of this case The scope shall be determined by the appended patent application scope.

10: First external terminal

20: Second external terminal

100A: Electronic devices

101: Upper side

102: Lower side

103: Zhou side

110: Structural parts

112: Accommodation space

120:Lithium battery

121:Battery core

122: Encapsulation film

123: First conductive layer

130: Second conductive layer

Claims (10)

An electronic device including: A structural member forming an accommodation space; A lithium battery located in the accommodation space, including: A battery core having a first conductive layer; and an encapsulating film surrounding the cell; and A second conductive layer is provided on the structural member or the encapsulation film, wherein the first conductive layer and the second conductive layer are electrically isolated. The electronic device as claimed in claim 1, further comprising a first external terminal and a second external terminal, the first external terminal and the second external terminal being electrically connected to the first conductive layer and the second conductive layer. The electronic device of claim 1, wherein the second conductive layer is located between the battery core and the encapsulation film, or between the structural component and the encapsulation film. The electronic device of claim 1, wherein the second conductive layer is located in the encapsulation film. The electronic device according to claim 1, wherein the battery core has an upper side, a lower side, and a circumferential side located between the upper side and the lower side, and the first conductive layer is located on the upper side and the lower side. Or the side of the week. The electronic device as claimed in claim 1, wherein the battery core has an upper side, a lower side, and a circumferential side located between the upper side and the lower side, the first conductive layer is composed of a plurality of units, and the The units are distributed on the upper side, the lower side or the peripheral side. The electronic device according to claim 1, wherein the first conductive layer has a closed ring structure. The electronic device of claim 1, wherein the battery core includes a positive electrode piece and a negative electrode piece, and the first conductive layer is adjacent to the positive electrode piece or the negative electrode piece. The electronic device of claim 1, wherein the first conductive layer has an insulating layer on the top side and/or the bottom side. The electronic device according to claim 1, wherein the battery core is of a wound type, a stacked type, or a combination thereof.

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