An electronic device

Abstract

The present application discloses an electronic device, which includes a first battery cell, a second battery cell, a circuit board, and a first bonding member. The first battery cell includes a first housing, a first electrode assembly, a first tab, and a first internal bonding member. The first internal bonding member bonds and fixes the first electrode assembly to the first housing. The second battery cell includes a second housing, a second electrode assembly, a second tab, and a second internal bonding member. The second internal bonding member bonds and fixes the second electrode assembly to the second housing. The first housing includes opposite first and second housing portions, and the second housing includes opposite third and fourth housing portions. The first and third housing portions are on the same side. The first bonding member bonds the first and third housing portions simultaneously. There is an overlapping area between the first bonding member and the first internal bonding member, and / or there is an overlapping area between the first bonding member and the second internal bonding member. This structure can effectively reduce the risk of tab tearing and improve the reliability of the electronic device during use.

Description

Technical Field

[0001] This application relates to the technical field of electronic products, and particularly to an electronic device. Background Art

[0002] Electronic products such as mobile phones, laptop computers, and tablet computers are usually equipped with rechargeable and dischargeable cells to provide electrical energy for them. Multiple cells are connected in series and / or in parallel to provide higher voltage and / or current for the electronic products, so as to meet the requirements of high-power applications. Summary of the Invention

[0003] The inventors of this application have found through research that in daily use scenarios, when there is a violent vibration, impact, or accidental drop, multiple cells in the electronic product are prone to dislocation or separation, resulting in uneven stress on each tab. The tab with a larger stress is prone to tearing, thus forming an open circuit and causing the electronic product to malfunction.

[0004] In view of this, this application provides an electronic device to reduce the risk of tab tearing and improve the reliability of the electronic device in use.

[0005] To solve the above technical problems, this application provides an electronic device, including a first cell, a second cell, and a circuit board; the first cell includes a first housing, a first electrode assembly, and a first tab. The first electrode assembly is received in the first housing. The first end of the first tab is electrically connected to the first electrode assembly, and the second end of the first tab extends out of the first housing and is electrically connected to the circuit board; the second cell includes a second housing, a second electrode assembly, and a second tab. The second electrode assembly is received in the second housing. The first end of the second tab is electrically connected to the second electrode assembly, and the second end of the second tab extends out of the second housing and is electrically connected to the circuit board; along a first direction, the first housing includes opposite first and second housing portions, and the second housing includes opposite third and fourth housing portions, wherein the first and third housing portions are on the same side; the electronic device further includes a first adhesive member. One side surface of the first adhesive member includes a first adhesive area and a third adhesive area. The first adhesive area is adhered to the first housing portion, and the third adhesive area is adhered to the third housing portion. The electronic device satisfies at least one of the following conditions: (1) The first cell further includes a first inner adhesive member. One side surface of the first inner adhesive member adheres to the first electrode assembly, and the other side surface of the first inner adhesive member adheres to the first housing portion; when observed along the first direction, there is an overlapping area between the first adhesive member and the first inner adhesive member; (2) The second cell further includes a second inner adhesive member. One side surface of the second inner adhesive member adheres to the second electrode assembly, and the other side surface of the second inner adhesive member adheres to the second housing portion; when observed along the first direction, there is an overlapping area between the first adhesive member and the second inner adhesive member.

[0006] In the above technical solution, due to the overlapping area between the first bonding member and the first inner bonding member, and / or the overlapping area between the first bonding member and the second inner bonding member, when the electronic device is subjected to violent vibration, impact or accidental drop, the misalignment pulling force acting on the first battery cell or the second battery cell can be quickly transmitted to the first electrode assembly through the first bonding member and the first inner bonding member, and / or quickly transmitted to the second electrode assembly through the first bonding member and the second inner bonding member, thereby suppressing the misalignment or separation between the first battery cell and the second battery cell, making the force on each tab more uniform, effectively reducing the risk of tab tearing, and improving the reliability of the electronic device during use.

[0007] In some embodiments, the second end of the first tab extends out of the first housing along the second direction, and the second end of the second tab extends out of the second housing along the second direction, where the second direction is perpendicular to the first direction. At this time, both the first tab and the second tab extend along the second direction, which facilitates the electrical connection between the first battery cell and the second battery cell and the circuit board.

[0008] In some embodiments, when viewed along the first direction, the first bonding member and the first inner bonding member have a first overlapping area. The length K1 of the first overlapping area along the second direction and the width P1 of the first overlapping area along the third direction satisfy: K1 ≥ 3 mm, P1 ≥ 3 mm; where the third direction is perpendicular to the first direction and the second direction respectively. At this time, the first bonding member and the first inner bonding member can better transmit the misalignment pulling force acting on the first battery cell to the first electrode assembly in the first battery cell, thereby better suppressing the misalignment or separation between the first battery cell and the second battery cell, making the force on each tab more uniform, and further reducing the risk of tab tearing.

[0009] In some embodiments, when viewed along the first direction, the first bonding member and the second inner bonding member have a second overlapping area. The length K2 of the second overlapping area along the first direction and the width P2 of the second overlapping area along the third direction satisfy: K2 ≥ 3 mm, P2 ≥ 3 mm; where the third direction is perpendicular to the first direction and the second direction respectively. At this time, the first bonding member and the second inner bonding member can better transmit the misalignment pulling force acting on the second battery cell to the second electrode assembly in the second battery cell, thereby better suppressing the misalignment or separation between the first battery cell and the second battery cell, making the force on each tab more uniform, and further reducing the risk of tab tearing.

[0010] In some embodiments, the electronic device includes a plurality of first bonding members. In this case, even if one of the first bonding members fails due to violent vibration, impact or accidental drop, the other first bonding members can still function, thereby further reducing the risk of tab tearing.

[0011] In some embodiments, the electronic device further includes a main body having a cavity, and the first battery cell, the second battery cell, and the circuit board are all received in the cavity; the electronic device further includes a second bonding member, one side surface of the second bonding member includes a second bonding area and a fourth bonding area, the second bonding area is bonded to the second housing portion, the fourth bonding area is bonded to the fourth housing portion, and the other side surface of the second bonding member is bonded to the inner surface of the cavity. At this time, the first battery cell and the second battery cell are bonded and fixed to the main body of the electronic device through the integral second bonding member, which can further prevent misalignment or separation between the first battery cell and the second battery cell, making the force on each tab more uniform, thereby further reducing the risk of tab tearing.

[0012] In some embodiments, along the second direction, the first housing portion includes a first top edge and a first bottom edge disposed opposite to each other, the third housing portion includes a third top edge and a third bottom edge disposed opposite to each other, and the first bonding member includes two first transverse edges disposed opposite to each other; the first top edge is closer to the first tab than the first bottom edge; the third top edge is closer to the second tab than the third bottom edge; the electronic device satisfies at least one of the following conditions: (1) the distance L1 between the first top transverse edge and the first top edge satisfies: L1 ≤ 11 mm, where the first top transverse edge is the first transverse edge of the first bonding member that is closest to the first top edge along the second direction; (2) the distance L2 between the first bottom transverse edge and the first bottom edge satisfies: L2 ≤ 11 mm, where the first bottom transverse edge is the first transverse edge of the first bonding member that is closest to the first bottom edge along the second direction; (3) the distance L3 between the first top transverse edge and the third top edge satisfies: L3 ≤ 11 mm, where the first top transverse edge is the first transverse edge of the first bonding member that is closest to the third top edge along the second direction; (4) the distance L4 between the first bottom transverse edge and the third bottom edge satisfies: L4 ≤ 11 mm, where the first bottom transverse edge is the first transverse edge of the first bonding member that is closest to the third bottom edge along the second direction. At this time, the first bonding member can better prevent misalignment or separation of the head and / or tail between the first battery cell and the second battery cell, making the force on each tab more uniform, thereby further reducing the risk of tab tearing.

[0013] In some embodiments, a plurality of first bonding members are sequentially spaced apart along the second direction, or, along the second direction, the distance between any two adjacent first bonding members is equal to zero.

[0014] In some embodiments, the electronic device includes a plurality of second bonding members. At this time, even if one of the second bonding members fails due to violent vibration, impact, or accidental drop, the other second bonding members can still function, thereby further reducing the risk of tab tearing.

[0015] In some embodiments, along a second direction, the second housing portion includes a second top edge and a second bottom edge which are oppositely arranged, the fourth housing portion includes a fourth top edge and a fourth bottom edge which are oppositely arranged, and the second bonding member includes two second transverse edges which are oppositely arranged; the second top edge is closer to the first tab than the second bottom edge; the fourth top edge is closer to the second tab than the fourth bottom edge; the electronic device satisfies at least one of the following conditions: (1) The distance D1 between the second top transverse edge and the second top edge satisfies: D1 ≤ 11 mm, where the second top transverse edge is the second transverse edge in the second bonding member that is closest to the second top edge along the second direction; (2) The distance D2 between the second bottom transverse edge and the second bottom edge satisfies: D2 ≤ 11 mm, where the second bottom transverse edge is the second transverse edge in the second bonding member that is closest to the second bottom edge along the second direction; (3) The distance D3 between the second top transverse edge and the fourth top edge satisfies: D3 ≤ 11 mm, where the second top transverse edge is the second transverse edge in the second bonding member that is closest to the fourth top edge along the second direction; (4) The distance D4 between the second bottom transverse edge and the fourth bottom edge satisfies: D4 ≤ 11 mm, where the second bottom transverse edge is the second transverse edge in the second bonding member that is closest to the fourth bottom edge along the second direction. At this time, the second bonding member can better inhibit the misalignment or separation of the heads and / or tails between the first battery cell and the second battery cell, making the forces on each tab more uniform, thereby further reducing the risk of tab tearing.

[0016] In some embodiments, along a third direction, the second housing portion is provided with a first side away from the second housing, the fourth housing portion is provided with a second side away from the first housing, and the second bonding member includes a first longitudinal edge and a second longitudinal edge which are oppositely arranged, where the first longitudinal edge is closer to the first side than the second longitudinal edge, and the third direction is perpendicular to the first direction and the second direction respectively; the distance C1 between the first longitudinal edge and the first side satisfies: C1 ≤ 9 mm, and / or, the distance C2 between the second longitudinal edge and the second side satisfies: C2 ≤ 9 mm. At this time, the first battery cell and / or the second battery cell can be better adhesively fixed to the main body of the electronic device through the second bonding member, so as to transfer the misalignment pulling force acting on the first battery cell or the second battery cell to the main body of the electronic device, inhibit the misalignment or separation between the first battery cell and the second battery cell, make the forces on each tab more uniform, thereby further reducing the risk of tab tearing.

[0017] In some embodiments, a plurality of second bonding members are arranged at intervals in sequence along the second direction, or, along the second direction, the distance between any two adjacent second bonding members is equal to zero.

[0018] In this application, by overlapping the first adhesive member with the first inner adhesive member and / or the second inner adhesive member, when the electronic device is subjected to violent vibration, impact or accidental drop, the misalignment pulling force acting on the first battery cell or the second battery cell can be quickly transmitted to the first electrode assembly through the first adhesive member and the first inner adhesive member, and / or quickly transmitted to the second electrode assembly through the first adhesive member and the second inner adhesive member, thereby suppressing the misalignment or separation between the first battery cell and the second battery cell, making the force on each tab more uniform, effectively reducing the risk of tab tearing, and improving the use reliability of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0020] Figure 1 It is a schematic view of the electronic device according to the embodiment of the present application observed along the first direction.

[0021] Figure 2 It is a cross-sectional view of the electronic device according to an embodiment of the present application observed along the second direction.

[0022] Figure 3 It is an exploded view of the first adhesive member of the electronic device according to the embodiment of the present application.

[0023] Figure 4 It is a bonding schematic view of the first adhesive member of the electronic device according to the embodiment of the present application.

[0024] Figure 5 It is an exploded view of the second adhesive member of the electronic device according to the embodiment of the present application.

[0025] Figure 6 It is a cross-sectional view of the electronic device according to another embodiment of the present application observed along the second direction.

[0026] Figure 7 It is a bonding schematic view of the second adhesive member of the electronic device according to the embodiment of the present application.

[0027] Figure 8 It is a schematic view of the setting of the electronic device of Comparative Example 1 in the experiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To facilitate the understanding of this application, the following provides a more detailed description of this application in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is stated to be "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is stated to be "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to this application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not used to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0030] In addition, the technical features involved in different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0031] Please refer to Figure 1 and Figure 2 , the electronic device 100 includes a main body 10, a first battery cell 20, a second battery cell 30, a circuit board 40, a first adhesive member 50, and a second adhesive member 60. The main body 10 is provided with a cavity, the first battery cell 20, the second battery cell 30, and the circuit board 40 are all received in the cavity, the circuit board 40 is electrically connected to the first battery cell 20 and the second battery cell 30 respectively to control the series or parallel connection of the first battery cell 20 and the second battery cell 30, the first adhesive member 50 simultaneously adheres the surfaces of the first battery cell 20 and the second battery cell 30 on the same side, and the second adhesive member 60 adheres the first battery cell 20 and the second battery cell 30 to the main body 10.

[0032] Regarding the above-mentioned first battery cell 20, please refer to Figure 1 and Figure 2, the first battery cell 20 includes a first housing 21, a first electrode assembly 22, a first tab 23, and a first internal bonding member 24. The first electrode assembly 22 is received within the first housing 21. The first end of the first tab 23 is electrically connected to the first electrode assembly 22, and the second end of the first tab 23 extends out of the first housing 21 and is electrically connected to the circuit board 40. The first housing 21 includes a first housing portion 211 and a second housing portion 212. The first housing portion 211 and the second housing portion 212 are relatively covered and connected along a first direction Y, and the first direction Y is the thickness direction of the first battery cell 20. Wherein, one side surface of the first internal bonding member 24 bonds to the first electrode assembly 22, and the other side surface of the first internal bonding member 24 bonds to the inner surface of the first housing portion 211. The first internal bonding member 24 is used to relatively fix the first electrode assembly 22 to the first housing portion 211, preventing the first electrode assembly 22 from moving within the first housing 21 when the electronic device 100 drops or is violently impacted, and pulling the first tab 23 to cause tearing of the first tab 23. The outer surface of the first housing portion 211 is connected to the first bonding member 50, and the outer surface of the second housing portion 212 is connected to the second bonding member 60.

[0033] For the above-mentioned second battery cell 30, please refer to Figure 1 and Figure 2 , the second battery cell 30 includes a second housing 31, a second electrode assembly 32, a second tab 33, and a second internal bonding member 34. The second electrode assembly 32 is received inside the second housing 31. The first end of the second tab 33 is electrically connected to the second electrode assembly 32, and the second end of the second tab 33 extends out of the second housing 31 and is electrically connected to the circuit board 40. The second housing 31 includes a third housing portion 311 and a fourth housing portion 312. The third housing portion 311 and the fourth housing portion 312 are relatively covered and connected along the first direction Y, and the first direction Y is the thickness direction of the second battery cell 30. It should be noted that Figure 2 the first housing 21 and the second housing 31 in

[0034] When viewed along the first direction Y, the first adhesive 50 and the first inner adhesive 24 have an overlapping area; and / or, when viewed along the first direction Y, the first adhesive 50 and the second inner adhesive 34 have an overlapping area. By arranging the first adhesive 50 and the first inner adhesive 24 and / or the second inner adhesive 34 so as to overlap, when the electronic device 100 is subjected to severe vibration, impact, or accidental drop, the misalignment pulling force acting on the first battery cell 20 or the second battery cell 30 can be quickly transferred to the first electrode assembly 22 through the first adhesive 50 and the first inner adhesive 24, and / or quickly transferred to the second electrode assembly 32 through the first adhesive 50 and the second inner adhesive 34, thereby preventing misalignment or separation between the first battery cell 20 and the second battery cell 30, making the force applied to each tab more uniform, and effectively reducing the risk of tab tearing.

[0035] See also Figure 1 and Figure 2 In some embodiments, the second end of the first tab 23 extends out of the first housing 21 along the second direction X, and the second end of the second tab 33 extends out of the second housing 31 along the second direction X, where the second direction X is perpendicular to the first direction Y. In this case, both the first tab 23 and the second tab 33 extend along the second direction X, facilitating electrical connection between the first battery cell 20 and the second battery cell 30 and the circuit board 40.

[0036] See also Figure 3 and Figure 5 , viewed along the first direction Y, the first shell portion 211 has a first top edge 2111 and a first bottom edge 2112. The first top edge 2111 is closer to the first tab 23 than the first bottom edge 2112. The second shell portion 212 has a second top edge 2121, a second bottom edge 2122, and a first side edge 2123. The second top edge 2121 is closer to the first tab 23 than the second bottom edge 2122. Both ends of the first side edge 2123 are respectively connected to the second top edge 2121 and the second bottom edge 2122. The first side edge 2123 is located on the side of the second shell portion 212 facing away from the second housing 31.

[0037] See also Figure 3 and Figure 5 As viewed along the first direction Y, the third shell portion 311 defines a third top edge 3111 and a third bottom edge 3112. The third top edge 3111 is closer to the second tab 33 than the third bottom edge 3112. The fourth shell portion 312 defines a fourth top edge 3121, a fourth bottom edge 3122, and a second side edge 3123. The fourth top edge 3121 is closer to the second tab 33 than the fourth bottom edge 3122. Both ends of the second side edge 3123 are connected to the fourth top edge 3121 and the fourth bottom edge 3122, respectively. The second side edge 3123 is located on a side of the fourth shell portion 312 facing away from the first shell 21.

[0038] For the first bonding member 50 described above, please refer to Figure 3 , the first bonding member 50 includes a first bonding area 51, a third bonding area 52, and a first transverse edge 55 disposed opposite to each other along the second direction X. Along the third direction Z, the first bonding area 51 and the third bonding area 52 are disposed on one side surface of the first bonding member 50. The first bonding area 51 is bonded to the outer surface of the first housing portion 211, and the third bonding area 52 is bonded to the outer surface of the third housing portion 311, where the third direction Z is perpendicular to the first direction Y and the second direction X respectively. That is, when observed along the first direction Y, the first bonding member 50 straddles and bonds the first battery cell 20 and the second battery cell 30 arranged side by side.

[0039] Specifically, when observed along the first direction Y, when the first bonding member 50 bonds the first housing portion 211 and the third housing portion 311 at the same time, the overlapping area between the first bonding member 50 and the first inner bonding member 24 is the first overlapping area 53, and the overlapping area between the first bonding member 50 and the second inner bonding member 34 is the second overlapping area 54. The length K1 of the first overlapping area 53 along the second direction X and the width P1 of the first overlapping area 53 along the third direction Z satisfy: K1≥3mm, P1≥3mm; the length K2 of the second overlapping area 54 along the second direction X and the width P2 of the second overlapping area 54 along the third direction Z satisfy: K2≥3mm, P2≥3mm, that is, the minimum side length in the first overlapping area 53 and the second overlapping area 54 should be greater than or equal to 3 millimeters. The sizes of the first overlapping area 53 and the second overlapping area 54 within the above range can enable the misalignment pulling force acting on the first battery cell 20 or the second battery cell 30 generated when the electronic device 100 is subjected to violent vibration, impact, or accidental drop to be better transmitted to the first electrode assembly 22 quickly through the first bonding member 50 and the first inner bonding member 24, or transmitted to the second electrode assembly 32 quickly through the first bonding member 50 and the second inner bonding member 34, thereby better suppressing the misalignment or separation between the first battery cell 20 and the second battery cell 30, making the force on each tab more uniform, and further reducing the risk of tab tearing. The first housing 21 of the first battery cell 20 and the second housing 31 of the second battery cell 30 can be made of soft materials such as aluminum-plastic film, or can be made of hard materials such as stainless steel, and the present application does not limit this here.

[0040] It can be understood that in some embodiments, the number of the first bonding members 50 is multiple, and the multiple first bonding members 50 are arranged in sequence along the second direction X, and each first bonding member 50 bonds the first housing portion 211 and the third housing portion 311 at the same time. At this time, even if one of the first bonding members 50 fails due to violent vibration, impact, or accidental drop, the other first bonding members 50 can still play a role, thereby further reducing the risk of tab tearing.

[0041] Please refer toFigure 3 and Figure 4 ,Regardless of whether there is only one first bonding member 50 or multiple first bonding members 50, along the second direction X, among all the first transverse edges 55 of the first bonding member 50, the one closer to the first top edge 2111 of the first housing portion 211 is the first top transverse edge 551, and the one closer to the first bottom edge 2112 of the first housing portion 211 is the first bottom transverse edge 552. The distance L1 between the first top transverse edge 551 and the first top edge 2111 satisfies: L1 ≤ 11 mm, the distance L2 between the first bottom transverse edge 552 and the first bottom edge 2112 satisfies: L2 ≤ 11 mm, the distance L3 between the first top transverse edge 551 and the third top edge 3111 satisfies: L3 ≤ 11 mm, and the distance L4 between the first bottom transverse edge 552 and the third bottom edge 3112 satisfies: L4 ≤ 11 mm. At this time, the first bonding member 50 can better inhibit the misalignment or separation of the heads and / or tails between the first battery cell 20 and the second battery cell 30, making the force on each tab more uniform, thereby further reducing the risk of tab tearing.

[0042] Considering that both ends of the first battery cell 20 and both ends of the second battery cell 30 are encapsulation areas, and surface wrinkles may occur in these encapsulation areas. To avoid the phenomenon of unstable bonding between the first bonding member 50 and the first housing portion 211 and the third housing portion 311, and for the purpose of reducing the overall weight of the electronic device 100, appropriate gaps can be left between the first top transverse edge 551 and the first bottom transverse edge 552 of the first bonding member 50 and both ends of the first housing portion 211 and both ends of the third housing portion 311. For example, L1 ≥ 5 mm, L2 ≥ 5 mm, L3 ≥ 5 mm, L4 ≥ 5 mm.

[0043] Of course, it can be understood that in some embodiments, when the number of the first bonding members 50 is multiple, the multiple first bonding members 50 can be arranged at intervals in sequence along the second direction X, or, along the second direction X, the distance between any two adjacent first bonding members 50 can be equal to zero.

[0044] For the above-mentioned second bonding member 60, in some embodiments, please refer to Figure 5 and Figure 6, the second adhesive member 60 includes a second adhesive area 61, a fourth adhesive area 62, a second transverse side 63, a first longitudinal side 64, and a second longitudinal side 65. The second adhesive area 61 and the fourth adhesive area 62 are disposed on one surface of the second adhesive member 60 along the third direction Z, and the second adhesive area 61 is adhered to the outer surface of the second housing portion 212, and the fourth adhesive area 62 is adhered to the outer surface of the fourth housing portion 312. The other surface of the second adhesive member 60 is adhered to the inner surface of the cavity. At this time, the first battery cell 20 and the second battery cell 30 are adhesively fixed to the main body 10 of the electronic device 100 through the integral second adhesive member 60, which can further prevent misalignment or separation between the first battery cell 20 and the second battery cell 30, making the force on each tab more uniform, thereby further reducing the risk of tab tearing. The second transverse sides 63 are oppositely disposed on both sides of the second adhesive member 60 along the second direction X. Along the third direction Z, the first longitudinal side 64 and the second longitudinal side 65 are oppositely disposed at both ends of the second adhesive member 60, and the first longitudinal side 64 is closer to the first side edge 2123 of the second housing portion 212 than the second longitudinal side 65.

[0045] It can be understood that in some embodiments, the number of the second adhesive members 60 is multiple, and the multiple second adhesive members 60 are sequentially disposed along the second direction X, and each second adhesive member 60 adhesively bonds the second housing portion 212 and the fourth housing portion 312 at the same time. The multiple second adhesive members 60 together adhesively fix the first battery cell 20 and the second battery cell 30 in the cavity of the main body 10. At this time, even if one of the second adhesive members 60 fails due to severe vibration, impact or accidental drop, the other second adhesive members 60 can still function, thereby further reducing the risk of tab tearing. Whether there is only one second adhesive member 60 or multiple second adhesive members 60, along the first direction X, among all the second transverse sides 63 of the second adhesive member 60, the one closer to the second top edge 2121 of the second housing portion 212 is the second top transverse side 631, and the one closer to the second bottom edge 2122 of the second housing portion 212 is the second bottom transverse side 632.

[0046] Please refer to Figures 5 to 7 , along the second direction X, the distance D1 between the second top transverse side 631 and the second top edge 2121 satisfies: D1 ≤ 11 mm, the distance D2 between the second bottom transverse side 632 and the second bottom edge 2122 satisfies: D2 ≤ 11 mm, the distance D3 between the second top transverse side 631 and the fourth top edge 3121 satisfies: D3 ≤ 11 mm, and the distance D4 between the second bottom transverse side 632 and the fourth bottom edge 3122 satisfies: D4 ≤ 11 mm. At this time, the second adhesive member 60 can better prevent misalignment or separation of the head and / or tail between the first battery cell 20 and the second battery cell 30, making the force on each tab more uniform, thereby further reducing the risk of tab tearing.

[0047] Along the third direction Z, the distance C1 between the first longitudinal edge 64 and the first side edge 2123 satisfies: C1 ≤ 9 mm, and / or, the distance C2 between the second longitudinal edge 65 and the second side edge 3123 satisfies: C2 ≤ 9 mm. At this time, the first battery cell 20 and / or the second battery cell 30 can be better adhesively fixed to the main body 10 of the electronic device 100 through the second adhesive member 60, so as to transfer the misalignment pulling force acting on the first battery cell 20 or the second battery cell 30 to the main body 10 of the electronic device 100, suppress the misalignment or separation between the first battery cell 20 and the second battery cell 30, make the force on each tab more uniform, and thus further reduce the risk of tab tearing.

[0048] Considering that the edges of the first battery cell 20 and the edges of the second battery cell 30 are both encapsulation areas, and surface wrinkles may occur in this encapsulation area. To avoid the phenomenon that the second adhesive member 60 is not firmly adhered to the second housing portion 212 and the fourth housing portion 312, and for the purpose of reducing the overall weight of the electronic device 100, appropriate gaps can be left at the edges of the second adhesive member 60 with respect to the second housing portion 212 and the fourth housing portion 312. For example, D1 ≥ 5 mm, D2 ≥ 5 mm, D3 ≥ 5 mm, D4 ≥ 5 mm, C1 ≥ 3 mm, C2 ≥ 3 mm.

[0049] Of course, it can be understood that in some embodiments, when the number of the second adhesive members 60 is multiple, the multiple second adhesive members 60 can be arranged at intervals along the second direction X in sequence, or, along the second direction X, the distance between any two adjacent second adhesive members 60 is equal to zero.

[0050] To facilitate readers to more easily and intuitively understand the technical solutions and effects of the electronic device in the embodiments of the present application, the following will use a square soft-pack lithium-ion battery for comparative experiments, and the specific experiments are as follows.

[0051] Experiment description: 10 groups of mobile phone models (including the cabin skeleton) are used in the experiment. After the connected first battery cell, second battery cell and circuit board are fixed through the first adhesive member (single-sided adhesive tape) and the second adhesive member (double-sided adhesive tape) and assembled into the battery compartment of the mobile phone model, a micro-drop test is carried out. The drop height during the test is 7 cm. The head (the end of the first battery cell and the second battery cell connected to the circuit board) is facing down and the tail is facing down, and they are dropped 20,000 times at 10 - 20 times / min respectively, and the four sides are dropped 500 times at 30 - 50 times / min respectively. The total number of drops is 42,000 times. The tab tearing situation of the first battery cell and the second battery cell is counted. If the tab tears, it is considered as failed, and if the tab does not tear, it is considered as passed. The tab tearing rate = the number of failed / 10.

[0052] Parameter description:

[0053] L1: The distance between the first top horizontal edge and the first top edge;

[0054] L2: The distance between the first bottom horizontal side and the first bottom side;

[0055] L3: The distance between the first top horizontal side and the third top side;

[0056] L4: The distance between the first bottom horizontal side and the third bottom side;

[0057] D1: The distance between the second top horizontal side and the second top side;

[0058] D2: The distance between the second bottom horizontal side and the second bottom side;

[0059] D3: The distance between the second top horizontal side and the fourth top side;

[0060] D4: The distance between the second bottom horizontal side and the fourth bottom side;

[0061] K1: The length of the first overlapping area along the first direction where the first bonding member and the first inner bonding member have the first overlapping area;

[0062] K2: The length of the second overlapping area along the first direction where the first bonding member and the second inner bonding member have the second overlapping area;

[0063] P1: The width of the first overlapping area along the third direction;

[0064] P2: The width of the second overlapping area along the third direction;

[0065] C1: The distance between the first longitudinal side and the first side;

[0066] C2: The distance between the second longitudinal side and the second side;

[0067] E1: The distance between two adjacent first bonding members along the second direction;

[0068] E2: The distance between two adjacent second bonding members along the second direction.

[0069] Comparative Example 1

[0070] The number of the first bonding members is one, such as Figure 8As shown, the first bonding member bonds the first battery cell and the second battery cell simultaneously, and there is no overlapping area between the first bonding member and the first inner bonding member and the second inner bonding member; the number of the second bonding members is two, one of the second bonding members independently bonds the first battery cell to the battery compartment, and the other second bonding member independently bonds the second battery cell to the battery compartment. Among them, the height of the first battery cell and the second battery cell is 72 mm, and the width of the first battery cell and the second battery cell is 56 mm; the distance between the second bonding member and the top and bottom edges of the first battery cell / second battery cell is 8 mm, and the distance from the side edge of the first battery cell / second battery cell is 7 mm; the width of the first bonding member in the third direction is 10 mm, and the bonding widths with the first battery cell and the second battery cell are 4 mm respectively; the width of the second bonding member in the third direction is 42 mm.

[0071] The difference between Examples 1-5 and Comparative Example 1 is that the number of the first bonding members is two, the first bonding members bond the first battery cell and the second battery cell simultaneously, and there is an overlapping area between the first bonding member and the first inner bonding member and the second inner bonding member. Among them, the width of the first bonding member in the second direction is 7 mm, and the size of the overlapping area is adjusted.

[0072] The difference between Examples 6-16 and Example 2 is that one side of the two second bonding members is bonded to the first battery cell and the second battery cell simultaneously, and the other side is bonded to the battery compartment. Among them, the width of the second bonding member in the second direction is 15 mm, and the distance between the two second bonding members and the edges of the first battery cell and the second battery cell is adjusted.

[0073] The specific parameters and micro-drop test results of Comparative Example 1 and Examples 1-16 are shown in Table 1 below.

[0074] Table 1

[0075]

[0076]

[0077] Note: "-" in the table indicates that there is no such parameter.

[0078] Experimental conclusion:

[0079] (1) Compared with the scheme where there is no overlapping area between the first bonding member and the first inner bonding member and the second inner bonding member, the scheme where there is an overlapping area between the first bonding member and the first inner bonding member and the second inner bonding member can effectively reduce the risk of ear tearing and improve the use reliability of electronic products.

[0080] (2) On the premise that there is an overlapping area between the first bonding member and the first inner bonding member and the second inner bonding member, the minimum side length of the overlapping area is greater than or equal to 3 mm, which can further reduce the risk of ear tearing.

[0081] (3) The second bonding member is arranged to bond the first battery cell and the second battery cell on one side and the battery compartment on the other side. Compared with the case where two second bonding members bond the first battery cell and the battery compartment, and the second battery cell and the battery compartment respectively, the risk of ear tearing can be further reduced.

[0082] (4) When the distance between the second bonding member and the heads and tails of the first battery cell and the second battery cell is less than 11 mm, and the distance between the second bonding member and the sides of the first battery cell and the second battery cell is less than 9 mm, the possibility of ear tearing is relatively low. When the distance is too small, for example, when the distance between the second bonding member and the heads and tails of the first battery cell and the second battery cell is 3 mm, and the distance between the second bonding member and the sides of the first battery cell and the second battery cell is 1 mm, the possibility of ear tearing slightly increases. This may be because the peripheries of the first battery cell and the second battery cell are all encapsulation areas, and surface wrinkles may occur at the edges of these encapsulation areas, resulting in unstable bonding between the second bonding member and the first battery cell and the second battery cell. When the distance is too large, for example, when the distance between the second bonding member and the heads and tails of the first battery cell and the second battery cell is 13 mm, the ability of the second bonding member to inhibit the misalignment or separation of the heads and / or tails between the first battery cell and the second battery cell is reduced, thus increasing the risk of ear tearing.

[0083] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An electronic device, comprising a first battery cell, a second battery cell and a circuit board; the first battery cell includes a first housing, a first electrode assembly and a first tab, the first electrode assembly is received in the first housing, a first end of the first tab is electrically connected to the first electrode assembly, and a second end of the first tab extends out of the first housing and is electrically connected to the circuit board; the second battery cell includes a second housing, a second electrode assembly and a second tab, the second electrode assembly is received in the second housing, a first end of the second tab is electrically connected to the second electrode assembly, and a second end of the second tab extends out of the second housing and is electrically connected to the circuit board; Along a first direction, the first housing includes opposite first and second housing portions, and the second housing includes opposite third and fourth housing portions, wherein, the first housing portion and the third housing portion are on the same side; the electronic device further includes a first adhesive member, one side surface of the first adhesive member includes a first adhesive area and a third adhesive area, the first adhesive area is adhered to the first housing portion, and the third adhesive area is adhered to the third housing portion, and characterized in that, the electronic device further includes a main body having a cavity, and the first battery cell, the second battery cell and the circuit board are all received in the cavity; the electronic device satisfies at least one of the following conditions: (1) The first battery cell further includes a first inner adhesive member, one side surface of the first inner adhesive member adheres to the first electrode assembly, and the other side surface of the first inner adhesive member adheres to the first housing portion; when observed along the first direction, there is an overlapping area between the first adhesive member and the first inner adhesive member; (2) The second battery cell further includes a second inner adhesive member, one side surface of the second inner adhesive member adheres to the second electrode assembly, and the other side surface of the second inner adhesive member adheres to the third housing portion; when observed along the first direction, there is an overlapping area between the first adhesive member and the second inner adhesive member.

2. The electronic device according to claim 1, wherein, the second end of the first tab extends out of the first housing along a second direction, the second end of the second tab extends out of the second housing along the second direction, and the second direction is perpendicular to the first direction.

3. The electronic device according to claim 2, wherein, the electronic device satisfies at least one of the following conditions: (1) When observed along the first direction, the first adhesive member and the first inner adhesive member have a first overlapping area, a length K1 of the first overlapping area along the second direction, and a width P1 of the first overlapping area along a third direction satisfy: K1≥3 mm, P1≥3 mm; wherein, the third direction is perpendicular to the first direction and the second direction respectively; (2) When observed along the first direction, the first bonding member and the second inner bonding member have a second overlapping region. The length K2 of the second overlapping region along the second direction and the width P2 of the second overlapping region along the third direction satisfy: K2 ≥ 3 mm, P2 ≥ 3 mm; wherein the third direction is perpendicular to the first direction and the second direction respectively; (3) The electronic device includes a plurality of the first bonding members.

4. The electronic device according to claim 2, wherein the electronic device further includes a second bonding member. One side surface of the second bonding member includes a second bonding area and a fourth bonding area. The second bonding area is bonded to the second housing portion, the fourth bonding area is bonded to the fourth housing portion, and the other side surface of the second bonding member is bonded to the inner surface of the cavity.

5. The electronic device according to claim 2, wherein along the second direction, the first housing portion includes a first top edge and a first bottom edge which are oppositely arranged, the third housing portion includes a third top edge and a third bottom edge which are oppositely arranged, and the first bonding member includes two first transverse edges which are oppositely arranged; the first top edge is closer to the first tab than the first bottom edge; the third top edge is closer to the second tab than the third bottom edge; the electronic device satisfies at least one of the following conditions: (1) The distance L1 between the first top transverse edge and the first top edge satisfies: L1 ≤ 11 mm, wherein the first top transverse edge is the first transverse edge of the first bonding member that is closest to the first top edge along the second direction; (2) The distance L2 between the first bottom transverse edge and the first bottom edge satisfies: L2 ≤ 11 mm, wherein the first bottom transverse edge is the first transverse edge of the first bonding member that is closest to the first bottom edge along the second direction; (3) The distance L3 between the first top transverse edge and the third top edge satisfies: L3 ≤ 11 mm, wherein the first top transverse edge is the first transverse edge of the first bonding member that is closest to the third top edge along the second direction; (4) The distance L4 between the first bottom transverse edge and the third bottom edge satisfies: L4 ≤ 11 mm, wherein the first bottom transverse edge is the first transverse edge of the first bonding member that is closest to the third bottom edge along the second direction.

6. The electronic device according to claim 3, wherein the plurality of first bonding members are arranged at intervals in sequence along the second direction, or, along the second direction, the distance between any two adjacent first bonding members is equal to zero.

7. The electronic device according to claim 4, characterized in that, The electronic device includes a plurality of the second bonding members.

8. The electronic device according to claim 4, wherein along the second direction, the second housing portion includes a second top edge and a second bottom edge which are oppositely arranged, the fourth housing portion includes a fourth top edge and a fourth bottom edge which are oppositely arranged, and the second bonding member includes two second transverse edges which are oppositely arranged; the second top edge is closer to the first tab than the second bottom edge; the fourth top edge is closer to the second tab than the fourth bottom edge; the electronic device satisfies at least one of the following conditions: (1) The distance D1 between the second top horizontal side and the second top side satisfies: D1 ≤ 11 mm, where the second top horizontal side is the second horizontal side in the second adhesive member that is closest to the second top side along the second direction; (2) The distance D2 between the second bottom horizontal side and the second bottom side satisfies: D2 ≤ 11 mm, where the second bottom horizontal side is the second horizontal side in the second adhesive member that is closest to the second bottom side along the second direction; (3) The distance D3 between the second top horizontal side and the fourth top side satisfies: D3 ≤ 11 mm, where the second top horizontal side is the second horizontal side in the second adhesive member that is closest to the fourth top side along the second direction; (4) The distance D4 between the second bottom horizontal side and the fourth bottom side satisfies: D4 ≤ 11 mm, where the second bottom horizontal side is the second horizontal side in the second adhesive member that is closest to the fourth bottom side along the second direction.

9. The electronic device according to claim 4, wherein along the third direction, the second housing portion is provided with a first side away from the second housing, the fourth housing portion is provided with a second side away from the first housing, and the second adhesive member includes a first longitudinal side and a second longitudinal side that are oppositely arranged, wherein the first longitudinal side is closer to the first side than the second longitudinal side, and the third direction is perpendicular to the first direction and the second direction respectively; the distance C1 between the first longitudinal side and the first side satisfies: C1 ≤ 9 mm, and / or the distance C2 between the second longitudinal side and the second side satisfies: C2 ≤ 9 mm.

10. The electronic device according to claim 7, wherein a plurality of the second adhesive members are arranged at intervals in sequence along the second direction, or, along the second direction, the distance between any two adjacent second adhesive members is equal to zero.

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