Battery and electronic device

Abstract

A battery (10) and an electronic device, the battery comprising a shell, a first adhesive member (100), a protection device (400), a first tab (500) and a second adhesive member (200). The shell defines a receiving cavity, the shell comprising a first surface (810) and a second surface (820) distanced from the first surface. The first adhesive member comprises a first adhesive surface and a second adhesive surface (120) oppositely arranged, the first adhesive surface being adhered to the first surface. The protection device is adhered to the second adhesive surface, the protection device comprising a main body portion (430) and a first connecting portion (410) electrically connected to the main body portion. The first tab comprises a second connecting portion (511) electrically connected to the first connecting portion, and the two portions combine to form a first combined portion (11) adhered to the second adhesive surface. The second adhesive member comprises a first portion (210) and a second portion (220) connected to each other, the first portion being adhered to the second surface, and the second portion being adhered to a surface of the first combined portion distanced from the first adhesive member.

Description

Technical Field

[0001] This application relates to the technical field of electrochemical devices, and in particular to a battery and electronic device. Background Technology

[0002] To prevent damage caused by abnormal temperature, charging / discharging voltage, or charging / discharging current, batteries are equipped with protection devices. These devices disconnect the battery circuit under these abnormal conditions, thus protecting the battery. However, the existing connection structure between the protection device and the battery cell is not stable enough. Summary of the Invention

[0003] The main technical problem addressed by the embodiments of this application is to provide a battery and electronic device that enables a more stable connection of the protection device.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a battery, the battery including a casing, a first adhesive member, a protective device, a first tab, and a second adhesive member. The casing defines a receiving cavity and includes a first surface and a second surface located outside the receiving cavity, the first surface and the second surface being separate. The first adhesive member includes a first adhesive surface and a second adhesive surface disposed opposite to each other, the first adhesive surface being bonded to the first surface. The protective device is bonded to the second adhesive surface, the protective device including a main body portion and a first connecting portion electrically connected to the main body portion. The first tab includes a second connecting portion located outside the receiving cavity, the second connecting portion being electrically connected to the first connecting portion, and the two being combined to form a first assembly portion, the first assembly portion being bonded to the second adhesive surface. The second adhesive member includes a first portion and a second portion connected to each other, the first portion being bonded to the second surface, and the second portion being bonded to the surface of the first assembly portion opposite to the first adhesive member. In this solution, on the one hand, the structure in which the second adhesive is bonded to the surface of the first assembly that is away from the second adhesive surface can prevent the first assembly from falling off the second adhesive surface. On the other hand, the structure in which the first part of the second adhesive is bonded to the first surface and the second part is bonded to the surface of the first assembly that is away from the second adhesive surface makes it easier to position the second part, so that the second part can be bonded to the target position more accurately.

[0005] In a further embodiment, the housing includes a side portion, which includes a first surface and a second surface. The first surface and the second surface are positioned opposite each other along the thickness direction of the side portion. In this design, on the one hand, the protection device can fully utilize the space available in the side portion, thereby increasing the battery's energy density. On the other hand, the protection device is closer to the first tab, facilitating electrical connection between the protection device and the first tab. When the first surface and the second surface are positioned opposite each other, the process of bonding the second adhesive component to the second surface is more convenient because the second surface is farther from the protection device. Especially when using automated equipment to bond the second adhesive component, the path during bonding will not interfere with the position of the protection device, making it easier to write automated programs. Furthermore, the arrangement space for the first part of the second adhesive component is larger, resulting in stronger adhesion. Simultaneously, when the second adhesive component is bent so that the second part is bonded to the surface of the first assembly portion away from the second bonding surface, the second adhesive component also covers the end edge of the side portion, improving the sealing effect of the housing.

[0006] In a further embodiment, the side portion includes an end edge located between the first surface and the second surface. The portion of the first tab extending beyond the end edge is a protrusion, which includes a second connecting portion. The protrusion is bent so that the second connecting portion is bonded to the second bonding surface. The first connecting portion connects to the surface of the second connecting portion opposite to the second bonding surface. In this solution, bonding the second connecting portion to the second bonding surface facilitates processing because the bonding step of attaching the second connecting portion to the second bonding surface can be completed during the processing of the battery cell body, and this bonding step does not require the participation of a protective device.

[0007] In a further embodiment, the second adhesive component includes a third part, one end of which is connected to the first part and the other end to the second part. The third part is either abutted against the end edge or spaced apart from the end edge. In this design, when the third part is abutted against the end edge, the sealing effect is improved. When the third part is spaced apart from the end edge, a certain amount of slack is provided for the second part, facilitating its adhesion.

[0008] In a further embodiment, the third part and the second part together cover the protrusion. This design improves safety by preventing the protrusion from coming into contact with other components, which could lead to short circuits or leakage.

[0009] In a further embodiment, the second portion covers the first assembly. This solution improves the protection for the first assembly.

[0010] In a further embodiment, the second portion is at least partially bonded to the second adhesive surface. This design improves the bonding effect of the second portion.

[0011] In a further embodiment, along the direction from the main body to the first assembly, the second portion includes a first side facing away from the main body and a second side close to the main body. Along the direction from the main body to the first assembly, the first assembly includes a third side facing away from the main body and a fourth side close to the main body. Along the direction from the main body to the first assembly, the distance H1 between the first and third sides satisfies 7 mm ≤ H1 ≤ 12 mm, and the portion of the second adhesive member extending beyond the first assembly is bonded to the second adhesive surface; and / or, along the direction from the main body to the first assembly, the distance H2 between the second and fourth sides satisfies 7 mm ≤ H2 ≤ 12 mm, and the portion of the second adhesive member extending beyond the first assembly is bonded to the second adhesive surface. This design makes the second portion less likely to detach from the second adhesive surface.

[0012] In a further embodiment, the housing further includes a third surface, which is connected to the side of the first surface away from the end edge, and the third surface intersects the first surface at an angle. The second portion is bent and adhered to the third surface. In this design, the adhesion effect of the second portion is improved.

[0013] In a further embodiment, along the direction from the main body to the first assembly, the first adhesive member includes a fifth side facing away from the main body, the fifth side being located on the side of the first side facing away from the main body. This design prevents the side of the second portion from lifting.

[0014] In a further embodiment, the protective device further includes a third connecting portion electrically connected to the side of the main body opposite to the first connecting portion, and the polarity of the third connecting portion is different from that of the first connecting portion. The battery also includes an electrical connecting portion, which includes a fourth connecting portion electrically connected to the third connecting portion and combined with the third connecting portion to form a second assembled portion, which is bonded to a second adhesive surface. The battery also includes a third adhesive member, which includes a fourth portion and a fifth portion connected to each other. The fourth portion is bonded to the second surface, and the fifth portion is bonded to the surface of the second assembled portion opposite to the first adhesive member. In this solution, the second assembled portion achieves a good adhesive and fixing effect.

[0015] In a further embodiment, the fifth part covers the second assembly. This solution improves the protection for the second assembly.

[0016] In a further embodiment, along the direction from the main body to the second assembly, the fifth portion includes a sixth side facing away from the main body and a seventh side close to the main body. Along the direction from the main body to the second assembly, the second assembly includes an eighth side facing away from the main body and a ninth side close to the main body. Along the direction from the main body to the second assembly, the distance H3 between the sixth and eighth sides satisfies 7 mm ≤ H3 ≤ 12 mm, and the portion of the third adhesive member extending beyond the second assembly is bonded to the second adhesive surface; and / or, along the direction from the main body to the second assembly, the distance H4 between the seventh and ninth sides satisfies 7 mm ≤ H4 ≤ 12 mm, and the portion of the third adhesive member extending beyond the second assembly is bonded to the second adhesive surface. In this design, the third adhesive member is less likely to detach from the second adhesive surface.

[0017] In a further embodiment, the housing further includes a third surface connected to the side of the first surface away from the receiving cavity, and the third surface intersects the first surface at an angle. The fifth portion is bent to be bonded to the third surface. In this design, the bonding effect of the fifth portion is improved.

[0018] In a further embodiment, along the direction from the main body to the second assembly, the first adhesive member includes a tenth side facing away from the main body, and a sixth side is located on the side of the tenth side facing away from the main body. In this design, the fifth part provides better adhesion.

[0019] In a further embodiment, the first part is connected to the fourth part, and the second adhesive and the third adhesive are integrally formed. This solution reduces the need for bonding the second and third adhesives.

[0020] In a further embodiment, the second part is connected to the fifth part, and the second adhesive and the third adhesive are integrally formed. This solution reduces the need for bonding the second and third adhesives.

[0021] In a further embodiment, the second and fifth portions together cover the second adhesive surface. This design improves the protective effect of both the second and third adhesive components.

[0022] In a further embodiment, along the direction from the main body to the first assembly, the second portion extends beyond the first adhesive member. Along the direction from the main body to the second assembly, the fifth portion extends beyond the first adhesive member. This design further enhances the protective effect of the second and third adhesive members.

[0023] A second aspect of this application also provides an electronic device comprising the battery of any of the above.

[0024] The battery provided in this application has a first adhesive component bonded to a first surface of the casing, and an opposing second adhesive surface used for bonding protection. Simultaneously, this application provides a second adhesive component. Specifically, the first portion of the second adhesive component is bonded to a second surface separate from the first surface, and the second portion is bonded to a surface of the first assembly portion facing away from the second adhesive surface. On one hand, the structure of the second adhesive component bonded to the surface of the first assembly portion facing away from the second adhesive surface prevents the first assembly portion from detaching from the second adhesive surface. On the other hand, the structure of the first portion of the second adhesive component bonded to the first surface and the second portion bonded to the surface of the first assembly portion facing away from the second adhesive surface facilitates the positioning of the second portion, allowing for more precise bonding of the second portion to the target location. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0026] Figure 1 This is a front view schematic diagram of the battery provided in the first embodiment of this application;

[0027] Figure 2 This is a side view schematic diagram of the battery provided in the first embodiment of this application;

[0028] Figure 3 This is a front view schematic diagram of the side portion and its components provided in the first embodiment of this application, wherein the second adhesive component has been removed;

[0029] Figure 4 This is a front view schematic diagram of the side portion and its components provided in the first embodiment of this application;

[0030] Figure 5 yes Figure 4 A cross-sectional view of the side portion and its components at the MM point;

[0031] Figure 6 yes Figure 4 Exploded cross-sectional view of the side portion and its components at the MM point;

[0032] Figure 7 This is a cross-sectional schematic diagram of the side portion and its components provided in the second embodiment of this application;

[0033] Figure 8 This is a front view schematic diagram of the side portion and its components provided in the third embodiment of this application;

[0034] Figure 9 yes Figure 8 A magnified view of a portion of point A in the middle;

[0035] Figure 10 This is a front view schematic diagram of the side portion and its components provided in the fourth embodiment of this application; wherein, the positional relationship between the third connecting portion and the fourth connecting portion after the third adhesive is shown;

[0036] Figure 11 yes Figure 10 A magnified view of a portion of point B in the middle;

[0037] Figure 12 This is a front view schematic diagram of the side portion and its components provided in the fourth embodiment of this application;

[0038] Figure 13 yes Figure 12 A cross-sectional view of the side portion and its components at point NN;

[0039] Figure 14 This is a rear view schematic diagram of the side portion and its components provided in the fifth embodiment of this application;

[0040] Figure 15 This is a rear view schematic diagram of the side portion and its components provided in the sixth embodiment of this application;

[0041] Figure 16 This is a front view schematic diagram of the side portion and its components provided in the seventh embodiment of this application;

[0042] Figure 17 This is a rear view schematic diagram of the side portion and its components provided in the seventh embodiment of this application. Detailed Implementation

[0043] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0045] Existing protection devices include a main body and two connecting parts of opposite polarity electrically connected to the main body. One connecting part is electrically connected to one of the tabs of the electrode assembly in the battery, and the other connecting part is connected to a conductive plate. The conductive plate is used to connect to an external circuit to discharge electrical energy from the battery. When the main body detects an abnormal ambient temperature or abnormal voltage or current during charging or discharging, an open circuit is formed within the main body of the protection device, preventing current from flowing between the two connecting parts connected to the main body. This disconnects the battery from the external circuit, thereby protecting the battery.

[0046] The applicant has discovered that existing protection devices are adhered to the battery casing. However, after a period of battery use, due to the aging of the adhesive components, the protection device is prone to detaching from the adhesive. Once the protection device detaches from the casing, when the battery experiences vibration, the vibration is transmitted to the connection point between the protection device and the battery tabs, which can eventually cause the protection device to detach from the battery tabs, resulting in an open circuit in the battery.

[0047] In view of this, see Figure 1-17 This embodiment provides a battery 10 that can improve the stability of the connection structure of the protection device 400. Specifically, the battery 10 includes a housing, a first adhesive 100, a protection device 400, an electrode assembly, and a second adhesive 200.

[0048] The housing defines a receiving cavity in which the electrode assembly and electrolyte are disposed. The housing includes a first surface 810 and a second surface 820 located outside the receiving cavity, and the first surface 810 and the second surface 820 are separate. The first surface 810 and the second surface 820 can be two separate surfaces located at any location outside the housing. It should be noted that the first surface 810 and the second surface 820 being separate means that the two surfaces have no overlapping portion; the first surface 810 and the second surface 820 can be in contact or spaced apart. When the first surface 810 and the second surface 820 are spaced apart, the first surface 810 and the second surface 820 can be two non-contacting surfaces at two different locations on the exterior of the housing (relative to the receiving cavity), or they can be two spaced-apart regions on one of the surfaces of the housing. When the first surface 810 and the second surface 820 are in contact, the first surface 810 and the second surface 820 can be two in contact surfaces at two different locations on the exterior of the housing, or they can be two in contact surfaces on the same surface on the exterior of the housing.

[0049] The first adhesive component 100 includes a first adhesive surface and a second adhesive surface 120 disposed opposite to each other. That is, the first adhesive component 100 is a double-sided adhesive. The first adhesive surface of the first adhesive component 100 is bonded to the first surface 810 of the housing. In other words, the surface of the housing that is bonded to the first adhesive surface is the first surface 810.

[0050] The protective device 400 is bonded to the second adhesive surface 120, meaning that at least a portion of the protective device 400 is bonded to the second adhesive surface 120. The protective device 400 includes a main body 430 and a first connecting portion 410 and a third connecting portion 420, which are electrically connected to the main body 430, respectively. The first connecting portion 410 and the third connecting portion 420 have opposite polarities.

[0051] An electrode assembly is provided within the housing cavity. The electrode assembly includes at least two tabs of opposite polarity, namely a first tab 500 and a second tab 700. The first tab 500 can be either a positive or a negative tab. For ease of description, the following embodiments will use the first tab 500 as the positive tab and the second tab 700 as the negative tab as an example.

[0052] A first tab 500 extends beyond the housing and includes a protrusion 510 located outside the receiving cavity. The protrusion 510 includes a second connecting portion 511. In other words, the entire portion of the first tab 500 outside the receiving cavity constitutes the protrusion 510, and the second connecting portion 511 is a part of the protrusion 510, specifically a portion for connecting with the first connecting portion 410. The second connecting portion 511 is electrically connected to the first connecting portion 410, and the two are combined to form a first assembly portion 11, which is bonded to a second bonding surface 120. That is, the first assembly portion 11 includes the first connecting portion 410 and the second connecting portion 511, and the entire assembly of the two is bonded to the second bonding surface 120. Specifically, in one embodiment, the first connecting portion 410 and the second connecting portion 511 can be connected outside the second bonding surface 120 to form the first assembly portion 11, and then bent to be bonded to the second bonding surface 120. The connection method between the first connecting part 410 and the second connecting part 511 is not limited in this embodiment; specifically, they can be welded. In other embodiments, they can be bolted together or bonded together using conductive adhesive.

[0053] When the first assembly 11 is bonded to the second bonding surface 120, the first connecting part 410 can be bonded to the second bonding surface 120, and the second connecting part 511 can be connected to the surface of the first connecting part 410 facing away from the second bonding surface 120. Alternatively, the second connecting part 511 can be bonded to the second bonding surface 120, and the first connecting part 410 can be connected to the surface of the second connecting part 511 facing away from the second bonding surface 120. Furthermore, both the first connecting part 410 and the second connecting part 511 can be bonded to the second bonding surface 120 and connected to each other. The connection method between the first connecting part 410 and the second connecting part 511 can be determined according to actual needs. In this embodiment, the first connecting part 410 and the second connecting part 511 are welded.

[0054] The second adhesive member 200 has a third adhesive surface 240 and includes a first portion 210 and a second portion 220 connected to each other. Both the first portion 210 and the second portion 220 have a portion of the aforementioned third adhesive surface 240. The second adhesive member 200 may include only the first portion 210 and the second portion 220, or it may include other portions besides the first portion 210 and the second portion 220. When the second adhesive member 200 includes other portions, the additional portions may be connected to the side of the first portion 210 opposite to the second portion 220, to the side of the second portion 220 opposite to the first portion 210, or between the first portion 210 and the second portion 220. That is, the first portion 210 and the second portion 220 may not be directly connected, but rather indirectly connected through additional portions of the second adhesive member 200 besides the first portion 210 and the second portion 220.

[0055] Specifically, in this embodiment, the first portion 210 of the second adhesive 200 is bonded to the second surface 820, and the second portion 220 is bonded to the surface of the first assembly 11 opposite to the first adhesive 100. That is to say, in this embodiment, the second adhesive 200 is bonded to the surface of the first assembly 11 opposite to the first adhesive 100, and the second adhesive 200 is bonded to at least the second surface 820 outside the first adhesive 100.

[0056] In summary, the battery 10 provided in this embodiment has a first adhesive surface of the first adhesive member 100 bonded to the first surface 810 of the housing, and an opposing second adhesive surface 120 used for bonding the protective device 400. Meanwhile, this application provides a second adhesive member 200. Specifically, the first portion 210 of the second adhesive member 200 is bonded to the second surface 820, which is separate from the first surface 810, and the second portion 220 of the second adhesive member 200 is bonded to the surface of the first assembly portion 11 facing away from the second adhesive surface 120.

[0057] On the one hand, the structure in which the second adhesive member 200 is bonded to the surface of the first assembly 11 facing away from the second adhesive surface 120 can prevent the first assembly 11 from falling off the second adhesive surface 120. On the other hand, the structure in which the first part 210 of the second adhesive member 200 is bonded to the second surface 820 and the second part 220 is bonded to the surface of the first assembly 11 facing away from the second adhesive surface 120 makes it easier to position the second part 220, so that the second part 220 can be bonded to the target position more accurately. Because the second adhesive surface 120 is adhesive, if the second adhesive component 200 is only adhered to the surface of the first assembly 11 away from the second adhesive surface 120, it will be difficult to remove the second adhesive component 200 from the second adhesive surface 120 if it is misaligned and adhered to the second adhesive surface 120. Alternatively, the removal of the second adhesive component 200 may pull on the first adhesive component 100, causing it to detach from the battery cell housing. However, the second adhesive component 200 in this application can be first adhered to the second surface 820 and then to the surface of the first assembly 11 away from the second adhesive surface 120. This allows the second adhesive component 200 to be positioned by the second surface 820 during the process of adhering to the first assembly 11 away from the second adhesive surface 120, resulting in more accurate adhesion and reducing the likelihood of misalignment.

[0058] The applicant has discovered that when the second adhesive 200 is only adhered to the surface of the first assembly 11 away from the first adhesive 100, if manual adhesion is used, the second adhesive 200 is difficult to adhere accurately to the target adhesion position, or a second or even third adhesion is required. Furthermore, when the second adhesive 200 is accidentally adhered to a position on the second adhesive surface 120 that is not originally intended to be adhered to, the second adhesive surface 120 is also adhesive, making it difficult to remove the second adhesive 200 for a second adhesion.

[0059] When the second adhesive 200 is only bonded to the surface of the first assembly 11 away from the first adhesive 100, if an automated bonding machine is used, it is difficult to ensure that the second adhesive 200 can adhere tightly to the surface of the first assembly 11 away from the first bonding surface and can be accurately bonded to the target bonding position. This results in high processing equipment costs.

[0060] Using the structure in this embodiment, after the second adhesive component 200 is pasted onto the second surface 820 of the housing, the process of pasting the second adhesive component 200 onto the surface of the first assembly 11 opposite to the first adhesive component 100 does not require consideration of the pasting position. If the second adhesive component 200 is accurately pasted onto the second surface 820, the subsequent pasting position of the second adhesive component 200 will also be relatively accurate. This makes it very convenient whether pasting is done manually or using automated equipment.

[0061] To prevent the protection device 400 from occupying too much usable space in the battery 10. See also Figure 1-6 In one embodiment, the housing includes a side portion 800, which includes a first surface 810 and a second surface 820 as described in the previous embodiment. The first surface 810 and the second surface 820 are disposed opposite each other along the thickness direction of the side portion 800. The side portion 800 of the housing can be a side of the housing used for encapsulation; when a cavity can be defined by two parts being closed, the housing has four sides. To improve the energy density of the battery 10, the sides of the housing are folded, while the side portion 800 in this application refers to a side of the housing without folding.

[0062] The first tab 500 of the battery 10 extends from one side of the housing into the receiving cavity. Therefore, the side through which the first tab 500 passes is not folded, so the side portion 800 can be the side of the battery 10 extending from the first tab 500. In this structure, on the one hand, the protection device 400 can fully utilize the space vacated at the side portion 800, thereby increasing the energy density of the battery 10. On the other hand, the protection device 400 is closer to the first tab 500, which also facilitates electrical connection between the protection device 400 and the first tab 500. Of course, in other embodiments, the side portion 800 can also be any other side of the housing besides the side extending from the first tab 500.

[0063] When the side portion 800 has the aforementioned first surface 810 and second surface 820, and the first surface 810 and second surface 820 are disposed opposite to each other along the thickness direction of the side portion 800, this embodiment defines the first surface 810 and the second surface 820 as follows: the side portion 800 has two surfaces arranged along its own thickness direction, namely the first surface 810 and the second surface 820. That is, the first surface 810 is the entirety of one of the surfaces of the side portion 800 arranged along its own thickness direction, and not just a region of that surface. The same applies to the second surface 820.

[0064] When the first surface 810 and the second surface 820 are positioned opposite each other, the process of bonding the second adhesive component 200 to the second surface 820 is more convenient because the second surface 820 is far from the protective device 400. This is especially true when using automated equipment to bond the second adhesive component 200, as the path of bonding the second adhesive component 200 to the second surface 820 will not interfere with the position of the protective device 400, making it easier to write automated programs. Furthermore, the first portion 210 of the second adhesive component 200 has a larger arrangement space, resulting in stronger adhesion. Simultaneously, when the second adhesive component 200 is bent so that the second portion 220 is bonded to the surface of the first assembly 11 away from the second adhesive surface 120, the second adhesive component 200 also covers the end edge of the side portion 800, improving the sealing effect of the housing.

[0065] When the side portion 800 is the side through which the first tab 500 protrudes, the side portion 800 includes an end edge located between the first surface 810 and the second surface 820, and the first tab 500 extends out of this end edge. The portion of the first tab 500 extending out of the aforementioned end edge is the protrusion portion 510, which includes the aforementioned second connecting portion 511. The protrusion portion 510 is bent so that the second connecting portion 511 is bonded to the second bonding surface 120. The first connecting portion 410 connects to the surface of the second connecting portion 511 facing away from the second bonding surface 120. In this solution, bonding the second connecting portion 511 to the second bonding surface 120 facilitates processing, because the bonding step of attaching the second connecting portion 511 to the second bonding surface 120 can be completed during the processing of the battery cell body, and this bonding step does not require the participation of the protective device 400. When the first connecting part 410 is bonded to the second adhesive surface 120, and the second connecting part 511 is connected to the surface of the first connecting part 410 facing away from the second adhesive surface 120, the battery cell body must be bonded together with the protection device 400 in the above bonding steps, making the bonding process relatively cumbersome. Furthermore, to facilitate the electrical connection between the first connecting part 410 and the second connecting part 511, they can be connected using conductive adhesive. The conductive adhesive includes a conductive agent and an adhesive component, which can bond the first connecting part 410 and the second connecting part 511 while ensuring current conduction between them.

[0066] See Figure 5-7 The second adhesive component 200 includes a third portion 230, one end of which is connected to the first portion 210 and the other end of which is connected to the second portion 220. That is, the first portion 210 and the second portion 220 are indirectly connected through the third portion 230. In this embodiment, the third portion 230 is attached to or spaced from the end edge of the side portion 800.

[0067] The applicant discovered that the first tab 500 extends from the end edge of the side portion 800 and is bent to fit against the second adhesive surface 120. The third portion 230 of the second adhesive member 200 at least covers a portion of the end edge. Therefore, in one embodiment, the third portion 230 and the second portion 220 together cover the protrusion 510. In other words, along the length of the side portion 800, the protrusion 510 and the second adhesive member 200 can be bent at the same position on the side portion 800, thereby allowing the second adhesive member 200 to cover the protrusion 510 of the first tab 500. This structure, on the one hand, allows the protrusion 510 to be protected by the second adhesive member 200, preventing the protrusion 510 from contacting other components and causing a short circuit. On the other hand, it also allows the second adhesive member 200 to bend from the second surface 820 to the first surface 810 at the shortest distance, improving processing efficiency.

[0068] In one embodiment, the second portion 220 covers the first assembly portion 11. This improves the protective effect of the first assembly portion 11. In a further embodiment, the second portion 220 is at least partially bonded to the second adhesive surface 120. That is, the portion of the second portion 220 extending beyond the first assembly portion 11 is bonded to the second adhesive surface 120. This enhances the protective effect of the second portion 220 and further prevents the second assembly portion 12 from detaching from the second adhesive surface 120.

[0069] The applicant has discovered that the bonding area between the second adhesive member 200 and the second adhesive surface 120 directly affects the bonding stability of the two. To improve the bonding stability of the second adhesive member 200, in one embodiment, along the direction from the main body portion 430 to the first assembly portion 11, the second portion 220 includes a first side facing away from the main body portion 430 and a second side close to the main body portion 430. Along the direction from the main body portion 430 to the first assembly portion 11, the first assembly portion 11 includes a third side facing away from the main body portion 430 and a fourth side close to the main body portion 430.

[0070] See Figure 8-9 In one embodiment, along the direction from the main body 430 to the first assembly 11, the distance H1 between the first side and the third side satisfies 7 mm ≤ H1 ≤ 12 mm (exemplarily, H1 can be 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm, etc.), and the portion of the second adhesive member 200 extending beyond the first assembly 11 is bonded to the second bonding surface 120. In other words, along the direction from the main body 430 to the first assembly 11, on the side away from the first assembly 11, the length of the portion of the second adhesive member 200 extending beyond the first assembly 11 is between 7 mm and 12 mm. The applicant has found that when H1 is less than 7 mm, the bonding effect of the second adhesive member 200 is poor, and it is easy to fall off the second bonding surface 120. When H1 is greater than 12 mm, it causes material waste on the one hand, and increases the bonding difficulty on the other hand. Therefore, when 7 mm ≤ H1 ≤ 12 mm, it can ensure that the second adhesive 200 has high adhesive stability and facilitate the adhesive operation of the second adhesive 200.

[0071] In another embodiment, along the direction from the main body 430 to the first assembly 11, the distance H2 between the second side and the fourth side satisfies 7 mm ≤ H2 ≤ 12 mm (exemplarily, H2 can be 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm, etc.), and the portion of the second adhesive member 200 extending beyond the first assembly 11 is bonded to the second bonding surface 120. In other words, along the direction from the first assembly 11 to the main body 430, at the position of the first assembly 11 between the main body 430 and the first assembly 11, the length of the portion of the second adhesive member 200 extending beyond the first assembly 11 is between 7 mm and 12 mm. The applicant has found that when H2 is less than 7 mm, the bonding effect of the second adhesive member 200 is poor, and it is easy to fall off the second bonding surface 120. When H2 is greater than 12 mm, it causes material waste on the one hand, and increases the bonding difficulty on the other hand. Therefore, when 7 mm ≤ H2 ≤ 12 mm, it can ensure that the second adhesive 200 has high adhesive stability and facilitate the adhesive operation of the second adhesive 200.

[0072] In another embodiment, 7 mm ≤ H1 ≤ 12 mm, and 7 mm ≤ H2 ≤ 12 mm. This ensures that both the side of the first assembly 11 closest to the main body 430 and the side away from the main body 430 can be well and permanently bonded and fixed.

[0073] See Figure 7 The housing also includes a third surface 900, which is connected to the side of the first surface 810 away from the end edge, and the third surface 900 intersects the first surface 810 at an angle, specifically at a 90-degree angle. The second part 220 is bent and bonded to the third surface 900. In this embodiment, after the second part 220 is bonded to the third surface 900, the bonding stability of the second adhesive 200 can be further improved, and the covering effect on the first assembly 11 can also be improved.

[0074] In one embodiment, along the direction from the main body 430 to the first assembly 11, the first adhesive member 100 includes a fifth side facing away from the main body 430, and the fifth side is located on the side of the first side facing away from the main body 430. In this solution, the first side of the second adhesive member 200 is located within the second adhesive surface 120, so that the first side of the second adhesive member 200 is bonded to the second adhesive surface 120 of the first adhesive member 100, resulting in higher bonding stability and less susceptibility to peeling due to aging.

[0075] In a further embodiment, the protection device 400 further includes a third connecting portion 420. The third connecting portion 420 is electrically connected to the side of the main body 430 opposite to the first connecting portion 410, and the polarity of the third connecting portion 420 is different from that of the first connecting portion 410. The battery 10 also includes an electrical connecting portion 600, which includes a fourth connecting portion 610. The fourth connecting portion 610 is electrically connected to the third connecting portion 420 and combines with the third connecting portion 420 to form a second assembly portion 12, which is bonded to a second bonding surface 120. The electrical connecting portion 600 is used to connect to an external circuit to conduct electrical energy from the battery cell to the external circuit. When any of the temperature, voltage, or current of the battery cell becomes abnormal, the main body 430 short-circuits, preventing current from flowing between the first connecting portion 410 and the third connecting portion 420, thereby preventing the current from the first tab 500 from being conducted to the electrical connecting portion 600.

[0076] In order to ensure that the second assembly part 12 can also be protected, see Figure 10-14 The battery 10 also includes a third adhesive member 300, which includes a fourth portion 310 and a fifth portion 320 connected to each other. The fourth portion 310 is bonded to the second surface 820, and the fifth portion 320 is bonded to the surface of the second assembly 12 opposite to the first adhesive member 100. Similarly, the third adhesive member 300 may include only the fourth portion 310 and the fifth portion 320, or it may include other portions besides the fourth portion 310 and the fifth portion 320. When the third adhesive member 300 includes other portions, the additional portions may be connected to the side of the fourth portion 310 opposite to the fifth portion 320, to the side of the fifth portion 320 opposite to the fourth portion 310, or between the fourth portion 310 and the fifth portion 320. That is, the fourth portion 310 and the fifth portion 320 may not be directly connected, but indirectly connected through the additional portions of the third adhesive member 300 besides the fourth portion 310 and the fifth portion 320. In this embodiment, a third adhesive 300 is used to bond the second assembly 12, making it less likely for the second assembly 12 to fall off the second adhesive surface 120. At the same time, the fourth part 310 of the third adhesive 300 is bonded to the second surface 820, and the fifth part 320 is bonded to the surface of the second assembly 12 away from the first adhesive 100, making the bonding efficiency of the third adhesive 300 higher and the bonding stability better.

[0077] In a further embodiment, the fifth portion 320 covers the second assembly 12. This improves the adhesion stability of the third adhesive 300 to the second assembly 12 and also enhances the protective effect on the second assembly 12.

[0078] See Figure 10-12Along the direction from the main body portion 430 to the second assembly portion 12, the fifth portion 320 includes a sixth side facing away from the main body portion 430 and a seventh side facing away from the main body portion 430. Along the direction from the main body portion 430 to the second assembly portion 12, the second assembly portion 12 includes an eighth side facing away from the main body portion 430 and a ninth side facing away from the main body portion 430. In one embodiment, along the direction from the main body portion 430 to the second assembly portion 12, the distance H3 between the sixth side and the eighth side satisfies 7 mm ≤ H3 ≤ 12 mm (exemplarily, H3 can be 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm, etc.), and the portion of the third adhesive member 300 extending beyond the second assembly portion 12 is bonded to the second adhesive surface 120. In other words, along the direction from the second assembly portion 12 to the main body portion 430, the portion of the third adhesive member 300 extending beyond the second assembly portion 12, away from the main body portion 430, has a length between 7 mm and 12 mm. The applicant has found that when H3 is less than 7 mm, the bonding effect of the third adhesive member 300 is poor, and it easily detaches from the second bonding surface 120. When H3 is greater than 12 mm, it results in material waste and increases the difficulty of bonding. Therefore, when 7 mm ≤ H3 ≤ 12 mm, it ensures both high bonding stability of the third adhesive member 300 and facilitates its bonding operation.

[0079] In another embodiment, along the direction from the main body 430 to the second assembly 12, the distance H4 between the seventh side and the ninth side satisfies 7 mm ≤ H4 ≤ 12 mm (exemplarily, H4 can be 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm, etc.), and the portion of the third adhesive member 300 extending beyond the second assembly 12 is bonded to the second bonding surface 120. In other words, along the direction from the second assembly 12 to the main body 430, at the position between the second assembly 12 and the main body 430, the length of the portion of the third adhesive member 300 extending beyond the second assembly 12 is between 7 mm and 12 mm. The applicant has found that when H4 is less than 7 mm, the bonding effect of the third adhesive member 300 is poor, and it is easy to fall off the second bonding surface 120. When H4 is greater than 12 mm, it causes material waste on the one hand, and increases the bonding difficulty on the other hand. Therefore, when 7 mm ≤ H4 ≤ 12 mm, it can ensure that the third adhesive 300 has high adhesive stability and facilitate the adhesive operation of the third adhesive 300.

[0080] When the third adhesive member 300 is present, the housing also includes a third surface 900, which is connected to the side of the first surface 810 away from the accommodating cavity, and the third surface 900 intersects the first surface 810 at an angle. The fifth portion 320 is bent to be bonded to the third surface 900. In this embodiment, after the fifth portion 320 is bonded to the third surface 900, the bonding stability of the third adhesive member 300 can be further improved, and the covering effect on the first assembly portion 11 can also be improved.

[0081] In a further embodiment, along the direction from the main body 430 to the second assembly 12, the first adhesive member 100 includes a tenth side facing away from the main body 430, and a sixth side is located on the side of the tenth side facing away from the main body 430. This structure can further improve the adhesive stability to the second assembly 12.

[0082] When both the second adhesive 200 and the second adhesive 200 are used to adhere the first assembly 11, and the second adhesive 200 is used to adhere the second assembly 12, in order to save on the adhesion process, see [reference needed]. Figure 15 In one embodiment, the first portion 210 is connected to the fourth portion 310, and the second adhesive member 200 and the third adhesive member 300 are integrally formed. In this embodiment, the second adhesive member 200 and the third adhesive member 300 are the same component, so when the second adhesive member 200 is bonded to the second surface 820, the third adhesive member 300 is also bonded to the second surface 820. Simultaneously, when the first portion 210 of the second adhesive member 200 and the fourth portion 310 of the third adhesive member 300 are integrated, the bonding area of ​​the combined second adhesive member 200 and the third adhesive member 300 on the second surface 820 can be increased, thus improving the bonding stability.

[0083] See Figure 16-17 In another embodiment, the second portion 220 of the second adhesive member 200 can be connected to the fifth portion 320 of the third adhesive member 300, and the second adhesive member 200 and the third adhesive member 300 are integrally formed. In this solution, the second portion 220 of the second adhesive member 200 and the fifth portion 320 of the third adhesive member 300 are connected as a whole, so that the protective device 400 can be more completely covered. At the same time, the second adhesive member 200 and the third adhesive member 300 can be bonded simultaneously, reducing the bonding process and lowering the processing cost.

[0084] When the second part 220 and the fifth part 320 are integrated, in one embodiment, the second part 220 and the fifth part 320 together cover the second adhesive surface 120. This results in better bonding between the second adhesive component 200 and the third adhesive component 300. Furthermore, since the second adhesive surface 120 is completely covered and the adhesive surface of the first adhesive component 100 is not exposed, the adhesive force of its adhesive surface decays more slowly over time, thus improving the service life of the first adhesive component 100.

[0085] When the second portion 220 and the fifth portion 320 jointly cover the second adhesive surface 120, the coverage area of ​​the second portion 220 and the fifth portion 320 can be equal to the area of ​​the second adhesive surface 120, or the coverage area of ​​the second portion 220 and the fifth portion 320 can be greater than the area of ​​the second adhesive surface 120. In one embodiment, along the direction from the main body portion 430 to the first assembly portion 11, the second portion 220 extends beyond the first adhesive member 100. Along the direction from the main body portion 430 to the second assembly portion 12, the fifth portion 320 extends beyond the first adhesive member 100. This ensures that the second adhesive surface 120 is completely covered, and the adhesive surface of the first adhesive member 100 is not exposed, thus slowing down the attenuation of adhesive force over time and improving the service life of the first adhesive member 100.

[0086] A second aspect of this application also provides an electronic device that includes the battery 10 in any of the above embodiments.

[0087] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A battery, characterized in that, include: A housing defining a receiving cavity, the housing including a first surface and a second surface located outside the receiving cavity, the first surface being separate from the second surface; The first adhesive component includes a first adhesive surface and a second adhesive surface disposed opposite to each other, wherein the first adhesive surface is bonded to the first surface; A protective device is bonded to the second bonding surface. The protective device includes a main body and a first connecting part electrically connected to the main body. The protective device also includes a third connecting part electrically connected to the side of the main body away from the first connecting part. The polarity of the third connecting part is different from that of the first connecting part. The first electrode includes a second connecting portion located outside the accommodating cavity. The second connecting portion is electrically connected to the first connecting portion, and the two are combined to form a first combined portion. The first combined portion is bonded to the second bonding surface. The second adhesive component includes a first portion and a second portion connected to each other, the first portion being bonded to the second surface, and the second portion being bonded to the surface of the first assembly portion opposite to the first adhesive component. An electrical connection portion, the electrical connection portion including a fourth connection portion, the fourth connection portion being electrically connected to the third connection portion and combined with the third connection portion to form a second assembly portion, the second assembly portion being bonded to a second bonding surface; The third adhesive component includes a fourth portion and a fifth portion connected to each other, the fourth portion being bonded to the second surface, and the fifth portion being bonded to the surface of the second assembly facing away from the first adhesive component.

2. The battery according to claim 1, characterized in that, The housing includes a side portion, which includes a first surface and a second surface. The first surface and the second surface are disposed opposite to each other along the thickness direction of the side portion.

3. The battery according to claim 2, characterized in that, The side portion includes an end edge located between the first surface and the second surface, and the portion of the first electrode extending beyond the end edge is a protrusion, the protrusion including a second connecting portion, the protrusion being bent so that the second connecting portion is bonded to the second bonding surface; The first connecting part connects to the surface of the second connecting part that is away from the second adhesive surface.

4. The battery according to claim 3, characterized in that, The second adhesive component includes a third part, one end of which is connected to the first part and the other end of which is connected to the second part; The third part is either attached to or spaced from the end edge.

5. The battery according to claim 4, characterized in that, The third part and the second part together cover the protrusion.

6. The battery according to claim 5, characterized in that, The second part covers the first assembly.

7. The battery according to claim 6, characterized in that, The second part is at least partially bonded to the second adhesive surface.

8. The battery according to claim 7, characterized in that, Along the direction from the main body to the first assembly, the second portion includes a first side facing away from the main body and a second side close to the main body; Along the direction from the main body to the first assembly, the first assembly includes a third side facing away from the main body and a fourth side close to the main body; Along the direction from the main body to the first assembly, the distance H1 between the first side and the third side satisfies 7 mm ≤ H1 ≤ 12 mm, and the portion of the second adhesive member extending beyond the first assembly is bonded to the second adhesive surface; and / or, along the direction from the main body to the first assembly, the distance H2 between the second side and the fourth side satisfies 7 mm ≤ H2 ≤ 12 mm, and the portion of the second adhesive member extending beyond the first assembly is bonded to the second adhesive surface.

9. The battery according to claim 8, characterized in that, The housing further includes a third surface, which is connected to the side of the first surface away from the end edge, and the third surface intersects the first surface at an angle; The second part is bent to adhere to the third surface.

10. The battery according to claim 8, characterized in that, Along the direction from the main body to the first assembly, the first adhesive member includes a fifth side facing away from the main body, the fifth side being located on the side of the first side facing away from the main body.

11. The battery according to claim 1, characterized in that, The fifth part covers the second assembly.

12. The battery according to claim 11, characterized in that, Along the direction from the main body to the second assembly, the fifth portion includes a sixth side facing away from the main body and a seventh side close to the main body; Along the direction from the main body to the second assembly, the second assembly includes an eighth side facing away from the main body and a ninth side close to the main body; Along the direction from the main body to the second assembly, the distance H3 between the sixth side and the eighth side satisfies 7 mm ≤ H3 ≤ 12 mm, and the portion of the third adhesive member extending beyond the second assembly is bonded to the second adhesive surface; and / or, along the direction from the main body to the second assembly, the distance H4 between the seventh side and the ninth side satisfies 7 mm ≤ H4 ≤ 12 mm, and the portion of the third adhesive member extending beyond the second assembly is bonded to the second adhesive surface.

13. The battery according to claim 12, characterized in that, The housing further includes a third surface, which is connected to the side of the first surface away from the accommodating cavity, and the third surface intersects the first surface at an angle; The fifth part is bent to adhere to the third surface.

14. The battery according to claim 12, characterized in that, Along the direction from the main body to the second assembly, the first adhesive member includes a tenth side facing away from the main body, and the sixth side is located on the side of the tenth side facing away from the main body.

15. The battery according to claim 1, characterized in that, The first part is connected to the fourth part, and the second adhesive is integrally formed with the third adhesive.

16. The battery according to claim 1, characterized in that, The second part is connected to the fifth part, and the second adhesive is integrally formed with the third adhesive.

17. The battery according to claim 16, characterized in that, The second part and the fifth part together cover the second adhesive surface.

18. The battery according to claim 16, characterized in that, Along the direction from the main body portion to the first assembly portion, the second portion extends beyond the first adhesive member; Along the direction from the main body to the second assembly, the fifth portion extends beyond the first adhesive member.

19. An electronic device, characterized in that, Includes the battery as described in any one of claims 1-18.

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