Batteries and electronic devices

Abstract

The present invention relates to the technical field of batteries, and discloses a battery and an electronic device, wherein the battery comprises an electrode assembly, a first shell and a second shell. The first shell comprises a first bottom wall and a first peripheral wall. The second shell comprises a second bottom wall and a second peripheral wall. The first peripheral wall is sleeved outside the second peripheral wall. The second peripheral wall comprises a first annular segment and a second annular segment, the second annular segment is located on the side of the first annular segment away from the second bottom wall, the first annular segment is spaced apart from the first peripheral wall and the spacing is T1, the second annular segment is spaced apart from the first peripheral wall and the spacing is T2, and 30%≤T2 / T1≤95%. In the above scheme, the adhesive forms different compression ratios between the first annular segment and the first peripheral wall and between the second annular segment and the first peripheral wall, and the compression ratio corresponds to the size requirement of 30%≤T2 / T1≤95%, so that the problem of the adhesive losing its sealing effect due to aging of the adhesive or battery vibration can be alleviated, thereby improving the service life of the battery.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of batteries, and in particular to a battery and an electronic device. Background Art

[0002] A battery is a device that converts external energy into electrical energy and stores it inside to power external electrical devices (such as portable electronic devices, etc.) when needed. At present, batteries are widely used in electrical devices such as drones, mobile phones, tablets, and laptops. In wireless Bluetooth headsets or in some wearable devices, snap-on batteries are often used. The two shells of the snap-on battery are snapped together, and the electrode assembly is housed in the two shells. The existing battery shell has a poor sealing effect, resulting in a short battery life. Summary of the invention

[0003] The main technical problem solved by the embodiments of the present invention is to provide a battery and an electronic device, which can increase the service life of the battery.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a battery, the battery includes an electrode assembly, a first shell and a second shell. The first shell includes a first bottom wall and a first peripheral wall, and the first bottom wall is connected to and covers one end of the first peripheral wall. The second shell includes a second bottom wall and a second peripheral wall, and the second bottom wall is connected to and covers one end of the second peripheral wall. The first peripheral wall is sleeved outside the second peripheral wall, so that the first shell and the second shell jointly define a receiving cavity for accommodating the electrode assembly. The second peripheral wall includes a first annular segment and a second annular segment, the second annular segment is located on the side of the first annular segment away from the second bottom wall, the first annular segment is spaced apart from the first peripheral wall and the spacing is T1, the second annular segment is spaced apart from the first peripheral wall and the spacing is T2, 30%≤T2 / T1≤95%. In the above scheme, through the coordination of the spacing T1 and the spacing T2, when the adhesive is arranged between the first circumferential wall and the second circumferential wall, the adhesive forms different compression ratios between the first annular segment and the first circumferential wall and between the second annular segment and the first circumferential wall, and the compression ratio corresponds to the size requirement of 30%≤T2 / T1≤95%, so that the sealing effect between the first circumferential wall and the second circumferential wall is better, which can alleviate the problem of the adhesive losing its sealing effect due to aging of the adhesive or battery vibration, thereby improving the service life of the battery.

[0005] In some embodiments, the second peripheral wall includes a spacing section spaced from the first peripheral wall, the spacing section includes a first annular section and a second annular section, the portion of the spacing section closest to the first peripheral wall is located in the second annular section, and the portion farthest from the first peripheral wall is located in the first annular section. In the above scheme, the compression ratio of each part of the adhesive member located between the spacing section and the first peripheral wall can better meet the requirements, so that the sealing effect between the first peripheral wall and the second peripheral wall is better, and the problem of the adhesive member losing its sealing effect due to aging of the adhesive member or battery vibration can be alleviated.

[0006] In some embodiments, the spacer segment further includes a third annular segment, one end of the third annular segment is connected to the first annular segment, and the other end is connected to the second annular segment. Along the direction from the second bottom wall to the first bottom wall, the distance between the third annular segment and the first peripheral wall gradually decreases. In the above scheme, the thickness of the adhesive at the position of the third annular segment gradually decreases along the first direction, and the size change of the adhesive is more gradual without sudden changes, which can improve the fit between the adhesive and the first peripheral wall and the second peripheral wall, and further improve the sealing effect of the adhesive.

[0007] In some embodiments, the first annular segment is located at the end of the spacing segment close to the second bottom wall, and the second annular segment is located at the end of the spacing segment away from the second bottom wall. In the above scheme, the distance between the first annular segment and the second annular segment along the first direction can be made farther, so that the thickness dimension change of the adhesive member along the first direction is smoother, and the fit between the adhesive member and the first peripheral wall and the second peripheral wall can be improved, and the sealing effect of the adhesive member is further improved.

[0008] In some embodiments, along the direction from the second bottom wall to the first bottom wall, the height dimension L1 of the first annular segment, the height dimension L2 of the second annular segment, and the height dimension L3 of the spacing segment satisfy: 10%≤L1 / L3≤50%, and / or 10%≤L2 / L3≤50%. In the above scheme, it is beneficial for the adhesive member to fit the first peripheral wall and the first annular segment well.

[0009] In some embodiments, along the direction from the second bottom wall to the first bottom wall, the spacing L4 from the first bottom wall to the second bottom wall and the height dimension L3 of the spacing segment satisfy: 50%≤L3 / L4≤80%. In the above scheme, the connection stability between the first peripheral wall and the second peripheral wall can be higher, and the arrangement space of the electrode assembly can be increased, thereby improving the energy density of the battery.

[0010] In some embodiments, the battery further includes an adhesive, the adhesive at least partially fills between the first peripheral wall and the second peripheral wall, and the adhesive is arranged around the outer periphery of the second peripheral wall. The adhesive includes a first part and a second part connected to each other, the first part at least partially fills the gap between the first annular segment and the first peripheral wall, and the second part at least partially fills the gap between the second annular segment and the first peripheral wall. In the above scheme, the part of the adhesive filled between the first annular segment and the first peripheral wall is connected to the part of the adhesive filled between the second annular segment and the first peripheral wall. Compared with the scheme in which the two parts exist independently, this scheme can improve the processing efficiency on the one hand, and improve the sealing effect on the other hand.

[0011] In some embodiments, the compression ratio of the second portion ranges from 40% to 120%. In the above solution, it is more conducive to the sealing of the adhesive member.

[0012] In some embodiments, the adhesive member further includes a third portion, the third portion is connected to an end of the second portion away from the first portion, and along the direction from the second bottom wall to the first bottom wall, the third portion exceeds the end of the second peripheral wall away from the second bottom wall. In the above solution, the gap between the end of the second peripheral wall away from the second bottom wall and the first peripheral wall is well covered by the adhesive member, thereby improving the sealing effect of the battery and reducing the occurrence of leakage.

[0013] In some embodiments, the third portion is folded to fit the inner annular wall surface of the second peripheral wall. In the above solution, the adhesive can be more closely connected to the second peripheral wall, which can effectively reduce the risk of the adhesive falling off the second peripheral wall.

[0014] In some embodiments, along the direction from the second bottom wall to the first bottom wall, the height dimension H1 of the third portion and the distance L4 between the first bottom wall and the second bottom wall satisfy 5%≤H1 / L4≤30%. In the above solution, the bonding effect of the adhesive can be improved while reducing the space occupied by the adhesive.

[0015] In some embodiments, the adhesive member further includes a fourth portion, the fourth portion is connected to the end of the first portion facing away from the second portion, and along the direction from the first bottom wall to the second bottom wall, the fourth portion exceeds the end of the first peripheral wall facing away from the first bottom wall. In the above solution, the fourth portion can well cover the space between the end of the first peripheral wall facing away from the first bottom wall and the second peripheral wall, effectively reducing the risk of battery leakage.

[0016] In some embodiments, along the direction from the second bottom wall to the first bottom wall, the size of the fourth portion is not less than 0.1 mm. In the above solution, the fourth portion can have a relatively ideal sealing effect.

[0017] In some embodiments, the first peripheral wall includes a fourth annular segment and a fifth annular segment, one end of the fourth annular segment is connected to the first bottom wall, and the other end of the fourth annular segment is connected to the fifth annular segment. Along the direction from the first bottom wall to the second bottom wall, the distance between the fifth annular segment and the second peripheral wall gradually decreases. In the above scheme, the port area of ​​the end of the first peripheral wall away from the first bottom wall becomes smaller, the gap between the first peripheral wall and the second peripheral wall is reduced, and the adhesive is compressed, further improving the sealing effect of the adhesive.

[0018] In some embodiments, the material of the adhesive member is at least one of polytetrafluoroethylene and its modified substances, propylene glycol methyl ether acetate and its modified substances, a small amount of copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene and its modified substances, polypropylene and its modified substances, polyethylene and its modified substances, and propylene ethylene copolymer. In the above scheme, the adhesive member can have higher elasticity and better sealing effect.

[0019] A second aspect of the present application also provides an electronic device, comprising any of the above batteries.

[0020] The battery provided by the present application, the first shell and the second shell jointly define a receiving cavity for accommodating the electrode assembly. The first peripheral wall of the first shell is sleeved outside the second peripheral wall of the second shell, and the first annular segment of the second peripheral wall is located on the side of the second annular segment away from the second bottom wall, wherein the spacing T1 between the first annular segment and the first peripheral wall and the spacing T2 between the second annular segment and the first peripheral wall meet 30%≤T2 / T1≤95%. In this scheme, through the coordination of the spacing T1 and the spacing T2, when the adhesive is arranged between the first peripheral wall and the second peripheral wall, the adhesive forms different compression ratios between the first annular segment and the first peripheral wall and between the second annular segment and the first peripheral wall, and the compression ratio corresponds to the size requirement of 30%≤T2 / T1≤95%, so that the sealing effect between the first peripheral wall and the second peripheral wall is better, and the problem of the adhesive losing the sealing effect due to aging of the adhesive or battery vibration can be alleviated, thereby improving the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0022] Figure 1 is a first full cross-sectional schematic diagram of a battery provided by a first embodiment of the present invention; wherein the segmented boundary lines of the first annular segment, the second annular segment and the third annular segment of the second peripheral wall are schematically shown;

[0023] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0024] Figure 3 is a schematic diagram of a full cross-section explosion of a battery provided by a first embodiment of the present invention;

[0025] Figure 4 is a schematic cross-sectional view of a battery provided by a second embodiment of the present invention; wherein the segmented boundary lines of the first annular segment, the second annular segment and the third annular segment of the second peripheral wall, and the segmented boundary lines of the fourth annular segment and the fifth annular segment of the first peripheral wall are schematically shown;

[0026] Figure 5 yes Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0027] Figure 6 is a three-dimensional full-section schematic diagram of a battery provided by a third embodiment of the present invention, wherein the electrode assembly is abstracted;

[0028] Figure 7 1 is a schematic diagram of a battery provided by a fourth embodiment of the present invention when viewed along a first direction X, wherein the second bottom wall is removed. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0031] The battery includes a shell and an electrode assembly located in the shell. In an existing type of battery, the shell of the battery includes a first shell and a second shell, the first shell includes a first peripheral wall, the second shell includes a second peripheral wall, the first peripheral wall is sleeved outside the second peripheral wall, an adhesive is provided between the first peripheral wall and the second peripheral wall, the adhesive is arranged around the second peripheral wall, and the inner annular wall surface of the adhesive is in contact with the outer annular wall surface of the second peripheral wall, and the outer annular wall surface of the adhesive is in contact with the inner annular wall surface of the first peripheral wall. The adhesive is used to bond the first peripheral wall and the second peripheral wall on the one hand, and to fill the gap between the first peripheral wall and the second peripheral wall on the other hand.

[0032] The applicant has found that the sealing effect of the existing adhesive is not good. On the one hand, after the battery has been used for a period of time, the adhesive will age and cause a gap between the first peripheral wall and the second peripheral wall, resulting in battery leakage. On the other hand, when the battery vibrates, the adhesive is easy to separate from the first peripheral wall or the second peripheral wall, resulting in a gap between the first peripheral wall and the second peripheral wall, resulting in battery leakage. In summary, the existing battery with the above structure has the problem of short service life.

[0033] In view of this, see Figure 1-7 The present application provides a battery 10 . Specifically, the battery 10 includes an electrode assembly 500 , a first shell 100 , a second shell 200 , and an adhesive member 400 .

[0034] The first housing 100 includes a first bottom wall 110 and a first peripheral wall 120. The first peripheral wall 120 is annular, and specifically, the first peripheral wall 120 plate can be annular, elliptical, rectangular or other polygonal. The first peripheral wall 120 plate has two ends opposite to each other, and the first bottom wall 110 connects and covers one end of the first peripheral wall 120. For ease of description, in the following embodiments, the first peripheral wall 120 is annular for example. When the first peripheral wall 120 is annular, the first bottom wall 110 is circular.

[0035] The second housing 200 includes a second bottom wall 210 and a second peripheral wall 220. The second peripheral wall 220 is annular. Similarly, the second peripheral wall 220 plate can be annular, elliptical, rectangular or other polygonal. The second peripheral wall 220 plate has two ends opposite to each other, and the second bottom wall 210 connects and covers one end of the second peripheral wall 220. For ease of description, the following embodiments are illustrated by taking the second peripheral wall 220 as an annular shape. When the second peripheral wall 220 is annular, the second bottom wall 210 is circular.

[0036] In this embodiment, see Figure 1-3The first circumferential wall 120 is sleeved outside the second circumferential wall 220, so that the second shell 200 and the first shell 100 jointly define a receiving cavity 300 for accommodating the electrode assembly 500. During installation, the end of the second circumferential wall 220 away from the second bottom wall 210 extends into the first circumferential wall 120 from the end of the first circumferential wall 120 away from the first bottom wall 110, and the inner annular wall surface of the first circumferential wall 120 and the outer annular wall surface of the second circumferential wall 220 are arranged at intervals.

[0037] See also Figure 1-3 For ease of description, in this embodiment and the following embodiments, the direction from the second bottom wall 210 to the first bottom wall 110 is defined as the first direction X. When the first peripheral wall 120 and the second peripheral wall 220 are circular, the first direction X is parallel to the central axis 600 of the second peripheral wall 220, and at this time, the central axis 600 of the first peripheral wall 120 can coincide with the central axis 600 of the second peripheral wall 220.

[0038] It should be noted that, in this embodiment, along the first direction X, the height dimension of the first peripheral wall 120 and the height dimension of the second peripheral wall 220 can be determined according to the specific situation. The height dimension of the first peripheral wall 120 along the first direction X can be greater than, less than or equal to the height dimension of the second peripheral wall 220 along the first direction X. Observed along the direction perpendicular to the first direction X, the overlap dimension between the first peripheral wall 120 and the second peripheral wall 220 along the first direction X can also be determined according to specific needs. In addition, the end of the second peripheral wall 220 away from the second bottom wall 210 can be attached to the first bottom wall 110, or can be spaced from the first bottom wall 110. For the convenience of description, in the following embodiments, the end of the second peripheral wall 220 away from the second bottom wall 210 is spaced from the first bottom wall 110 as an example for illustration.

[0039] The second peripheral wall 220 includes a first annular segment 2211 and a second annular segment 2212. The first annular segment 2211 and the second annular segment 2212 are distributed along the first direction X, and the second annular segment 2212 is located on the side of the first annular segment 2211 away from the second bottom wall 210. The first annular segment 2211 and the second annular segment 2212 are both spaced apart from the first peripheral wall 120. That is to say, when viewed in a direction perpendicular to the first direction X, at least a portion of the first annular segment 2211 overlaps with the first peripheral wall 120, and the second annular segment 2212 overlaps with the first peripheral wall 120. In addition, along the circumference around the first annular segment 2211, any position of the first annular segment 2211 does not contact the first peripheral wall 120; along the circumference around the second annular segment 2212, any position of the second annular segment 2212 does not contact the first peripheral wall 120.

[0040] Along the first direction X, the height dimension of the first annular segment 2211 and the height dimension of the second annular segment 2212 are determined according to specific requirements. The first annular segment 2211 and the second annular segment 2212 may intersect with each other, that is, they are directly connected. The first annular segment 2211 and the second annular segment 2212 may also be far away from each other, not intersecting, and indirectly connected through the portion of the second peripheral wall 220 located between the first annular segment 2211 and the second annular segment 2212 (that is, the third annular segment 2213 in one embodiment below).

[0041] After the electrode assembly 500 is accommodated in the accommodation cavity 300 between the first shell 100 and the second shell 200, the method of extracting the electric energy of the battery 10 depends on specific needs. Figure 1-3 In one embodiment, the electrode assembly 500 includes a first pole ear 510 and a second pole ear 520 with different polarities, the first pole ear 510 is electrically connected to the first shell 100, and the second pole ear 520 is electrically connected to the second shell 200, so that the first shell 100 and the second shell 200 are both charged and have different polarities. The external circuit can obtain the power of the battery 10 by being electrically connected to the first shell 100 and the second shell 200 respectively.

[0042] The adhesive member 400 is annular, and its outer annular wall surface and inner annular wall surface may both be adhesive, and the outer annular wall surface of the adhesive member 400 is bonded to the inner annular wall surface of the first peripheral wall 120, and the inner annular wall surface of the adhesive member 400 is bonded to the outer annular wall surface of the second peripheral wall 220. The adhesive member 400 is at least partially filled between the first peripheral wall 120 and the second peripheral wall 220. In other words, the adhesive member may be completely filled between the first peripheral wall 120 and the second peripheral wall 220; or a part of the adhesive member may be filled between the first peripheral wall 120 and the second peripheral wall 220, and the other part may be located outside the gap between the first peripheral wall 120 and the second peripheral wall 220 (the part may be located on the side of the end of the first peripheral wall 120 away from the first bottom wall 110, or on the side of the end of the second peripheral wall 220 away from the second bottom wall 210).

[0043] See also Figure 2-3 The adhesive member 400 includes a first portion 410 and a second portion 420 connected to each other. The first portion 410 is arranged around the outer periphery of the first annular segment 2211, and the first portion 410 at least partially fills the gap between the first annular segment 2211 and the first peripheral wall 120. The second portion 420 is arranged around the outer periphery of the second annular segment 2212, and the second portion 420 at least partially fills the gap between the second annular segment 2212 and the first peripheral wall 120. The first portion 410 and the second portion 420 may intersect with each other, and the two are directly connected. The first portion 410 and the second portion 420 may not intersect, and the two are indirectly connected through other portions of the adhesive member 400.

[0044] The material of the adhesive member 400 may be determined according to the specific situation. For example, the adhesive member 400 may be at least one of polytetrafluoroethylene and its modified substance, propylene glycol methyl ether acetate and its modified substance, a small amount of perfluoropropyl perfluorovinyl ether copolymer and polytetrafluoroethylene and its modified substance, polypropylene and its modified substance, polyethylene and its modified substance, and propylene ethylene copolymer. When the material of the adhesive member 400 is at least one of the above materials, the adhesive member 400 can have higher elasticity and better sealing effect.

[0045] In particular, in this embodiment, the first annular segment 2211 is spaced apart from the first peripheral wall 120 at a spacing of T1, and the second annular segment 2212 is spaced apart from the first peripheral wall 120 at a spacing of T2, and 30%≤T2 / T1≤95%. For example, T2 / T1 may be 30%, 40%, 50%, 60%, 70%, 80%, 90% or 95%, etc. It should be noted that the spacing T1 is the spacing between any position of the first annular segment 2211 and the first peripheral wall 120, and the spacing between any position of the first annular segment 2211 and the first peripheral wall 120 may be equal, or the spacing between any position of the first annular segment 2211 and the first peripheral wall 120 may be unequal along the first direction X. The spacing T2 is the spacing between any position of the second annular segment 2212 and the first peripheral wall 120. The second annular segment 2212 may have an equal spacing with the first peripheral wall 120 at any position, or may have unequal spacing with the first peripheral wall 120 at any position along the first direction X. 30%≤T2 / T1≤95% means that the spacing between at least one position of the second annular segment 2212 and the first peripheral wall 120 is 30% to 95% of the spacing between at least one position of the first annular segment 2211 and the first peripheral wall 120. In one embodiment, the spacing between at least one position of the second annular segment 2212 and the first peripheral wall 120 is 30% to 95% of the spacing between at least one position of the first annular segment 2211 and the first peripheral wall 120. In one embodiment, the spacing between at least one position of the second annular segment 2212 and the first peripheral wall 120 is 30% to 95% of the spacing between at least one position of the first annular segment 2211 and the first peripheral wall 120.

[0046] In this embodiment, by coordinating the spacing T1 and the spacing T2, when the adhesive member 400 is disposed between the first peripheral wall 120 and the second peripheral wall 220, the adhesive member 400 forms different compression ratios between the first annular segment 2211 and the first peripheral wall 120 and between the second annular segment 2212 and the first peripheral wall 120, and the compression ratio corresponds to the size requirement of 30%≤T2 / T1≤95%, so that the sealing effect between the first peripheral wall 120 and the second peripheral wall 220 is better, which can alleviate the problem of the adhesive member 400 losing its sealing effect due to aging of the adhesive member 400 or vibration of the battery 10, thereby improving the service life of the battery 10.

[0047] The second peripheral wall 220 includes a spacing section 221 spaced from the first peripheral wall 120. In other words, when viewed from a direction perpendicular to the first direction X, the overlapping portion between the second peripheral wall 220 and the first peripheral wall 120 is the spacing section 221. The height dimension of the spacing section 221 along the first direction X depends on specific requirements. Figure 1-3 In one embodiment, along the first direction X, the interval L4 from the first bottom wall 110 to the second bottom wall 210 and the height dimension L3 of the spacing segment 221 satisfy: 50%≤L3 / L4≤80%. Exemplarily, L3 / L4 may be 50%, 60%, 70% or 80%. When 50%≤L3 / L4≤80%, the connection stability between the first peripheral wall 120 and the second peripheral wall 220 can be high, and the arrangement space of the electrode assembly 500 can be increased, thereby increasing the energy density of the battery 10.

[0048] The spacer 221 includes a first annular segment 2211 and a second annular segment 2212. The arrangement position of the closest spacing between the spacer 221 and the first peripheral wall 120 and the arrangement position of the farthest spacing between the spacer 221 and the first peripheral wall 120 are determined according to specific needs. In one embodiment, the arrangement position of the closest spacing between the spacer 221 and the first peripheral wall 120 can be located at the second annular segment 2212. In another embodiment, the arrangement position of the closest spacing between the spacer 221 and the first peripheral wall 120 can be located at a position outside the second annular segment 2212 of the spacer 221. Similarly, in one embodiment, the arrangement position of the farthest spacing between the spacer 221 and the first peripheral wall 120 can be located at the first annular segment 2211. In another embodiment, the arrangement position of the farthest spacing between the spacer 221 and the first peripheral wall 120 can be located at a position outside the first annular segment 2211 of the spacer 221.

[0049] For ease of description, the following is an example of a structure in which the portion of the spacer 221 closest to the first peripheral wall 120 is located in the second annular segment 2212, and the portion farthest from the first peripheral wall 120 is located in the first annular segment 2211. When the portion of the spacer 221 closest to the first peripheral wall 120 is located in the second annular segment 2212, and the portion farthest from the first peripheral wall 120 is located in the first annular segment 2211, the compression ratio of each portion of the adhesive member 400 located between the spacer 221 and the first peripheral wall 120 can better meet the requirements, so that the sealing effect between the first peripheral wall 120 and the second peripheral wall 220 is better, and the problem of the adhesive member 400 losing its sealing effect due to aging of the adhesive member 400 or vibration of the battery 10 can be alleviated.

[0050] The arrangement position of the first annular segment 2211 in the spacing segment 221 and the arrangement position of the second annular segment 2212 in the spacing segment 221 can be determined according to specific needs. In one embodiment, the first annular segment 2211 is located at the end of the spacing segment 221 close to the second bottom wall 210, and the second annular segment 2212 is located at the end of the spacing segment 221 away from the second bottom wall 210. In this solution, the spacing between the first annular segment 2211 and the second annular segment 2212 along the first direction X can be made farther, so that the thickness dimension change of the adhesive member 400 along the first direction X is smoother, and the fit between the adhesive member 400 and the first peripheral wall 120 and the second peripheral wall 220 can be improved, and the sealing effect of the adhesive member 400 is further improved.

[0051] Along the first direction X, the ratio between the height dimension L1 of the first annular segment 2211 and the height dimension L3 of the spacing segment 221 can be determined according to specific requirements. Figure 2 In one embodiment, along the first direction X, the height dimension L1 of the first annular segment 2211 and the height dimension L3 of the spacing segment 221 satisfy 10%≤L1 / L3≤50%. For example, L1 / L3 may be 10%, 20%, 30%, 40% or 50%. In one embodiment, along the first direction X, the height dimension L1 of the first annular segment 2211 and the height dimension L3 of the spacing segment 221 satisfy 30%≤L1 / L3≤50%. This solution facilitates the adhesive member 400 to fit the first peripheral wall 120 and the first annular segment 2211 well.

[0052] Similarly, along the first direction X, the ratio between the height dimension L2 of the second annular segment 2212 and the height dimension L3 of the spacing segment 221 can be determined according to specific requirements. Figure 2In one embodiment, along the first direction X, the height dimension L2 of the second annular segment 2212 and the height dimension L3 of the spacing segment 221 satisfy 10%≤L2 / L3≤50%. For example, L2 / L3 may be 10%, 20%, 30%, 40% or 50%, etc. This solution facilitates the adhesive member 400 to fit the first peripheral wall 120 and the second annular segment 2212 well.

[0053] In some embodiments, the spacing segment 221 further includes a third annular segment 2213, one end of the third annular segment 2213 is connected to the first annular segment 2211, and the other end is connected to the second annular segment 2212. That is to say, in this embodiment, the first annular segment 2211 and the second annular segment 2212 do not intersect with each other, and the two are indirectly connected through the third annular segment 2213. The third annular segment 2213 intersects with both the first annular segment 2211 and the second annular segment 2212 respectively. In particular, in this embodiment, along the first direction X, the distance between the third annular segment 2213 and the first peripheral wall 120 gradually decreases, and can be specifically reduced linearly or at other rates of change. In this embodiment, along the first direction X, the distance between the third annular segment 2213 and the first peripheral wall 120 decreases linearly. In this solution, the thickness of the adhesive 400 at the position of the third annular segment 2213 gradually decreases along the first direction X, and the size change of the adhesive 400 is more gradual without sudden changes, which can improve the fit between the adhesive 400 and the first peripheral wall 120 and the second peripheral wall 220, and further improve the sealing effect of the adhesive 400.

[0054] In some embodiments, the compression ratio of the second portion 420 of the adhesive member 400 may range from 40% to 120% along a direction perpendicular to the first direction X. For example, the compression ratio may be 40%, 50%, 60%, 70%, 80%, 90%, 100%, 110% or 120%, etc. In the present application, the “compression ratio of the second portion 420” refers to the ratio of the thickness of the second portion 420 when it is located between the first peripheral wall 120 and the second peripheral wall 220 to the thickness of the second portion 420 after being disassembled from the battery 10 and allowed to stand and recover to a free state.

[0055] When the compression ratio of the adhesive 400 is between 40% and 100%, illustratively, the compression ratio can be 40%, 50%, 60%, 70%, 80%, 90% or 100%, etc., after the second portion 420 is located between the first peripheral wall 120 and the second peripheral wall 220 (specifically, between the second annular segment 2212 and the first peripheral wall 120), the second portion 420 is in a compressed state, and the internal stress at the fastening point between the first peripheral wall 120 and the second peripheral wall 220 is relatively large, requiring the shell to use a material with higher mechanical strength, or the shell thickness can support the stress at this point without cracks. At the same time, the elasticity of the material of the adhesive 400 used can support the large internal stress without breaking.

[0056] When the compression ratio of the second part 420 is between 100% and 120%, illustratively, the compression ratio can be 100%, 105%, 110%, 115% or 120%, etc., the snap-fit ​​stress between the first peripheral wall 120 and the second peripheral wall 220 is relatively small, and the bonding mainly relies on the hot pressing action between the adhesive 400 and the first peripheral wall 120 and the second peripheral wall 220. However, because the hot pressing bonding process itself will cause the adhesive 400 to expand and increase in thickness, a rebound of 100% to 120% relative to the original adhesive 400 thickness is an appropriate proportion, and efficient sealing can also be achieved. The advantage of this sealing situation is that the requirements for shell strength, adhesive 400 strength and material are relatively low, and the production efficiency is relatively high.

[0057] See also Figure 4-5 , the applicant considers that the end of the second peripheral wall 220 away from the second bottom wall 210 is spaced from the first peripheral wall 120. In this embodiment, in order to further improve the sealing effect of the adhesive member 400, the adhesive member 400 further includes a third portion 430 connected to the second portion 420. Along the first direction X, the third portion 430 exceeds the end of the spacing section 221 away from the second bottom wall 210. In this way, the gap between the end of the second peripheral wall 220 away from the second bottom wall 210 and the first peripheral wall 120 is well covered by the adhesive member 400, thereby improving the sealing effect of the battery 10 and reducing the occurrence of liquid leakage.

[0058] When the end of the second annular segment 2212 away from the second bottom wall 210 is spaced apart from the first bottom wall 110, and the adhesive member 400 extends out of the end of the second annular segment 2212 away from the second bottom wall 210, the third portion 430 may extend to fit with the first bottom wall 110, or may extend to be spaced apart from the first bottom wall 110. In order to improve the sealing effect, in one embodiment, the third portion 430 extends to fit with the first bottom wall 110, and further, the third portion 430 may be bonded to the first bottom wall 110.

[0059] See also Figure 4-5In one embodiment, the third portion 430 of the adhesive member 400 is folded to fit the inner annular wall surface of the second peripheral wall 220. In this solution, on the one hand, the adhesive member 400 can be more closely connected to the second peripheral wall 220, which can effectively reduce the risk of the adhesive member 400 falling off the second peripheral wall 220. On the other hand, the adhesive member 400 can be first bonded to the outer annular wall surface of the second peripheral wall 220, and then the portion extending out of the second peripheral wall 220 is bent to fit the inner annular wall surface of the second peripheral wall 220, and then the second peripheral wall 220 is extended into the first peripheral wall 120. The structure in which the third portion 430 of the adhesive member 400 is folded to fit the inner annular wall surface of the second peripheral wall 220 makes it difficult for the adhesive member 400 to be misaligned with the second peripheral wall 220 during the process of the second peripheral wall 220 extending into the first peripheral wall 120, so that the positioning accuracy of the adhesive member 400 is higher.

[0060] See also Figure 5 When the third portion 430 of the adhesive member 400 is bent to fit the inner annular wall surface of the second peripheral wall 220, in some embodiments, along the first direction X, the height dimension H1 of the third portion 430 and the spacing L4 between the first bottom wall 110 and the second bottom wall 210 satisfy 5%≤H1 / L4≤30%. Exemplarily, H1 / L4 may be 5%, 10%, 15%, 20%, 25% or 30%. When 5%≤H1 / L4≤30%, the adhesive member 400 has a better bonding effect and reduces the occupied space of the adhesive member 400.

[0061] The end of the adhesive member 400 away from the first bottom wall 110 may extend out of the gap between the first peripheral wall 120 and the second peripheral wall 220, or may be located in the gap between the first peripheral wall 120 and the second peripheral wall 220. In order to improve the sealing effect of the adhesive member 400, see Figure 4-5 In one embodiment, the adhesive member 400 may further include a fourth portion 440 connected to the first portion 410, and the fourth portion 440 is connected to the end of the first portion 410 away from the second portion 420. The fourth portion 440 extends beyond the end of the first peripheral wall 120 away from the first bottom wall 110 in the opposite direction of the first direction X. The fourth portion 440 can well cover the space between the end of the first peripheral wall 120 away from the first bottom wall 110 and the second peripheral wall 220, effectively reducing the risk of leakage of the battery 10.

[0062] In some embodiments, along the first direction X, the height dimension H2 of the fourth portion 440 is not less than 0.1 mm. For example, along the first direction X, the height H2 of the fourth portion 440 may be 0.11 mm, 0.13 mm, 0.15 mm, 0.17 mm, 0.19 mm or 0.21 mm. In this solution, the fourth portion 440 can have a relatively ideal sealing effect.

[0063] See also Figure 1-3 In one embodiment, the first peripheral wall 120 includes a fourth annular segment 121 and a fifth annular segment 122 connected in sequence along the first direction X, one end of the fourth annular segment 121 is connected to the first bottom wall 110, and the other end of the fourth annular segment 121 is connected to the fifth annular segment 122. The fifth annular segment 122 can be located at the end of the first peripheral wall 120 away from the second peripheral wall 220, or can be located near the middle of the first peripheral wall 120. For ease of description, the following example is taken as an example of the fifth annular segment 122 being located at the end of the first peripheral wall 120 away from the first bottom wall 110. In the opposite direction of the first direction X, the distance between the fifth annular segment 122 and the second peripheral wall 220 gradually decreases. In this solution, the port area of ​​the end of the first peripheral wall 120 away from the first bottom wall 110 becomes smaller, the gap between the first peripheral wall 120 and the second peripheral wall 220 is reduced, and the adhesive 400 is compressed at the same time, further improving the sealing effect of the adhesive 400.

[0064] The second aspect of the present application also provides an electronic device, which includes the battery 10 provided in the present application. The electronic device of the present application is not particularly limited, and it can be any electronic device known in the prior art. For example, the electronic device includes but is not limited to a laptop computer, a pen-input computer, a mobile computer, an electronic book player, a portable phone, a portable fax machine, a portable copier, a portable printer, a head-mounted stereo headset, a video recorder, a liquid crystal television, a portable cleaner, a portable CD player, a mini-disc, a transceiver, an electronic notepad, a calculator, a memory card, a portable recorder, a radio, a backup power supply, a motor, a car, a motorcycle, a power-assisted bicycle, a bicycle, a lighting fixture, a toy, a game console, a clock, an electric tool, a flashlight, a camera, a large household battery 10 and a lithium ion capacitor, etc.

[0065] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not used as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the protection scope of the claims attached to the present invention.

Claims

1. A battery, characterized in that: include: Electrode assembly; A first shell, comprising a first bottom wall and a first peripheral wall, wherein the first bottom wall is connected to and covers one end of the first peripheral wall; A second shell, comprising a second bottom wall and a second peripheral wall, wherein the second bottom wall is connected to and covers one end of the second peripheral wall, and the first peripheral wall is sleeved outside the second peripheral wall, so that the first shell and the second shell together define a receiving cavity for receiving the electrode assembly; Wherein, the second peripheral wall includes a spacing segment spaced from the first peripheral wall, the spacing segment includes a first annular segment, a second annular segment and a third annular segment, the portion of the spacing segment closest to the first peripheral wall is located in the second annular segment, the portion of the spacing segment farthest from the first peripheral wall is located in the first annular segment, the second annular segment is located on a side of the first annular segment away from the second bottom wall, the first annular segment is spaced from the first peripheral wall at a spacing of T1, the second annular segment is spaced from the first peripheral wall at a spacing of T2, and 30%≤T2 / T1≤95%; One end of the third annular segment is connected to the first annular segment, and the other end is connected to the second annular segment; along the direction from the second bottom wall to the first bottom wall, the distance between the third annular segment and the first peripheral wall gradually decreases.

2. The battery according to claim 1, characterized in that The first annular segment is located at an end of the spacing segment close to the second bottom wall, and the second annular segment is located at an end of the spacing segment away from the second bottom wall.

3. The battery according to claim 1, characterized in that Along the direction from the second bottom wall to the first bottom wall, the height dimension L1 of the first annular segment, the height dimension L2 of the second annular segment, and the height dimension L3 of the spacing segment satisfy: 10%≤L1 / L3≤50%, and / or 10%≤L2 / L3≤50%.

4. The battery according to claim 1, characterized in that Along the direction from the second bottom wall to the first bottom wall, the distance L4 from the first bottom wall to the second bottom wall and the height dimension L3 of the spacing segment satisfy: 50%≤L3 / L4≤80%.

5. The battery according to claim 1, characterized in that The battery further includes an adhesive member, wherein the adhesive member is at least partially filled between the first peripheral wall and the second peripheral wall, and the adhesive member is arranged around the outer periphery of the second peripheral wall; The adhesive member includes a first part and a second part connected to each other, the first part at least partially fills the gap between the first annular segment and the first peripheral wall, and the second part at least partially fills the gap between the second annular segment and the first peripheral wall.

6. The battery according to claim 5, characterized in that The compression ratio of the second portion ranges from 40% to 120%.

7. The battery according to claim 5, characterized in that The adhesive member further includes a third portion connected to an end of the second portion facing away from the first portion, and along a direction from the second bottom wall to the first bottom wall, the third portion exceeds an end of the second peripheral wall facing away from the second bottom wall.

8. The battery according to claim 7, characterized in that The third portion is folded to fit the inner annular wall surface of the second peripheral wall.

9. The battery according to claim 8, characterized in that Along the direction from the second bottom wall to the first bottom wall, a height dimension H1 of the third portion and a distance L4 between the first bottom wall and the second bottom wall satisfy 5%≤H1 / L4≤30%.

10. The battery according to claim 7, characterized in that The adhesive component further includes a fourth portion connected to an end portion of the first portion facing away from the second portion, and along a direction from the first bottom wall to the second bottom wall, the fourth portion exceeds an end portion of the first peripheral wall facing away from the first bottom wall.

11. The battery according to claim 10, characterized in that Along the direction from the second bottom wall to the first bottom wall, the size of the fourth portion is not less than 0.1 mm.

12. The battery according to claim 1, characterized in that The first peripheral wall includes a fourth annular segment and a fifth annular segment, one end of the fourth annular segment is connected to the first bottom wall, and the other end of the fourth annular segment is connected to the fifth annular segment; Along the direction from the first bottom wall to the second bottom wall, the distance between the fifth annular segment and the second peripheral wall gradually decreases.

13. The battery according to claim 5, characterized in that The material of the adhesive is at least one of polytetrafluoroethylene and its modified substances, propylene glycol methyl ether acetate and its modified substances, a small amount of copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene and its modified substances, polypropylene and its modified substances, polyethylene and its modified substances, and propylene ethylene copolymer.

14. An electronic device, characterized in that: A battery comprising any one of claims 1 to 13.

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