Electric equipment

Abstract

The invention discloses electric equipment, which comprises an electric main body, a cover body and a secondary battery, the power utilization main body is provided with a battery compartment. The cover body is detachably arranged on the power utilization main body and covers the battery compartment. And the secondary battery is arranged in the battery compartment and is electrically connected with the power utilization main body. The secondary battery comprises a shell, an electrode assembly and a bonding piece, the electrode assembly is arranged in the shell, and the bonding piece is bonded with the cover body and the shell. The bonding piece comprises a base layer, a first bonding layer and a second bonding layer. In the first direction, the first bonding layer and the second bonding layer are arranged on different sides of the base layer respectively. The viscosity of the first bonding layer can be reduced, and the first bonding layer is bonded with the cover body. The viscosity of the second bonding layer is fixed, and the second bonding layer is bonded with the shell. And the secondary battery and the cover body are detached by reducing the viscosity of the first bonding layer, so that the detaching convenience is improved. And moreover, the secondary battery can be disassembled under the condition that the wrapping film is cancelled, so that the settable space of the secondary battery is favorably improved, and the capacity of the secondary battery is favorably improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery fixing, and in particular to an electrical device. Background Art

[0002] In the prior art, the secondary battery of the electrical equipment is arranged in the battery compartment, and the secondary battery and the battery compartment are bonded by traditional double-sided tape. In order to facilitate the removal of the secondary battery from the battery compartment, a wrapping film is generally provided on the shell surface of the secondary battery. However, due to the adhesion between the secondary battery and the battery compartment, the wrapping film is easily pulled off during disassembly, resulting in a poor disassembly experience. In addition, the thickness of the traditional double-sided tape and the wrapping film required in the battery compartment as a whole is relatively large, resulting in the capacity of the secondary battery to be improved. Summary of the invention

[0003] In view of this, the present application provides an electrical device that is beneficial to increasing the capacity of a secondary battery.

[0004] The present application provides an electrical device, including an electrical main body, a cover body and a secondary battery. The electrical main body is provided with a battery compartment. The cover body is detachably arranged on the electrical main body and covers the battery compartment. The secondary battery is arranged in the battery compartment and is electrically connected to the electrical main body. The secondary battery includes a shell, an electrode assembly and an adhesive, the shell is provided with a receiving cavity, the electrode assembly is arranged in the receiving cavity, and the adhesive adheres the cover body to the shell. The adhesive includes a base layer, a first adhesive layer and a second adhesive layer. Along the first direction, the first adhesive layer and the second adhesive layer are respectively arranged on different sides of the base layer. The viscosity of the first adhesive layer can be reduced and bonded to the cover body, and the viscosity of the second adhesive layer is fixed and bonded to the shell.

[0005] The adhesive member adheres the secondary battery and the cover body, and the second adhesive layer fixed by adhesiveness is conducive to reducing the possibility of the secondary battery moving in the battery compartment and improving the stability of the secondary battery in the battery compartment. When the secondary battery needs to be disassembled, the cover body and the power-consuming body are disassembled first, and then the secondary battery and the cover body are disassembled by reducing the viscosity of the first adhesive layer, which is conducive to improving the convenience of disassembly. In addition, the secondary battery can be disassembled without the wrapping film, which is conducive to increasing the space available for the secondary battery, thereby facilitating the capacity of the secondary battery.

[0006] In one or more of the above embodiments, the material of the first adhesive layer includes a first material and a second material, the first material includes at least one of polyacrylate, polyurethane, epoxy resin, and their derivatives, and the second material includes at least one of silicon dioxide, aluminum oxide, fluoride, and titanium dioxide. The refractive index of the first material is n1, and the refractive index of the second material is n2, 1.3≤n1≤1.4, 1.3≤n2≤1.4. The solid content of the first adhesive layer is m1, 10%≤m1≤60%.

[0007] In the above embodiment, the viscosity of the first adhesive layer can be reduced under the irradiation of ultraviolet light, and the convenience of disassembling the secondary battery and the cover body can be improved by irradiating the first adhesive layer with ultraviolet light. In addition, the negative impact of ultraviolet light on the secondary battery is relatively low, and when the secondary battery and the cover body are disassembled by ultraviolet light irradiation to inspect the secondary battery, it is helpful to reduce the damage to the performance of the secondary battery.

[0008] In one or more of the above embodiments, along the first direction, the light transmittance of the portion of the cover body that overlaps with the projection of the first adhesive layer is greater than 70%.

[0009] In the above embodiment, the ultraviolet light is advantageously allowed to irradiate the first adhesive layer through the cover along the first direction, thereby facilitating faster reduction of the viscosity of the first adhesive layer and further improving the convenience of disassembling the secondary battery and the cover.

[0010] In one or more of the above embodiments, the material of the first adhesive layer includes a third material and a fourth material, the third material includes at least one of polyacrylate, polyurethane, epoxy resin, and their derivatives, and the fourth material includes at least one of silicone oil, fluoride, wax, and surfactant. The solid content of the first adhesive layer is m1, 10%≤m1≤60%.

[0011] In the above embodiment, the viscosity of the first adhesive layer can be reduced under low temperature conditions. By reducing the temperature of the first adhesive layer, it is beneficial to improve the convenience of disassembling the secondary battery and the cover.

[0012] In one or more of the above embodiments, the material of the first adhesive layer includes the fifth material and the fourth material, the fifth material includes at least one of polyacrylate, polyurethane, epoxy resin, phenolic resin, silicone rubber, and their derivatives, and the fourth material includes at least one of silicone oil, fluoride, wax, and surfactant. The solid content of the first adhesive layer is m1, 10%≤m1≤60%.

[0013] In the above embodiment, the viscosity of the first adhesive layer can be reduced under high temperature conditions. By increasing the temperature of the first adhesive layer, it is beneficial to improve the convenience of disassembling the secondary battery and the cover.

[0014] In one or more of the above embodiments, the material of the cover body includes metal material.

[0015] In the above embodiment, the thermal conductivity of the cover is improved, and the cooling rate or heating rate of the first adhesive layer is increased, so as to reduce the viscosity of the first adhesive layer more quickly, and further improve the convenience of disassembling the secondary battery and the cover.

[0016] In one or more of the above embodiments, the material of the first adhesive layer includes at least one of polyaniline, polypyrrole and polythiophene.

[0017] In the above embodiment, the viscosity of the first adhesive layer can be reduced under static electricity conditions, and the convenience of disassembling the secondary battery and the cover body is improved by allowing static electricity to flow through the cover body.

[0018] In one or more of the above embodiments, the material of the first adhesive layer further includes at least one of alkyl sulfate, alkylbenzene sulfonate quaternary ammonium salt, amine salt, polyethylene glycol and polyoxyethylene.

[0019] In the above embodiment, the resistivity of the first adhesive layer is reduced, and the rate of conducting static charge away from the secondary battery is increased, thereby reducing the damage to the performance of the secondary battery caused by static electricity accumulation after the viscosity of the first adhesive layer is reduced by static electricity.

[0020] In one or more of the above embodiments, the material of the first adhesive layer further includes at least one of conductive polyurethane, conductive polyamide, nanotube coating and graphene coating.

[0021] In the above embodiment, the first adhesive layer can provide a low resistance path for conducting static charge away from the secondary battery, which is beneficial to increase the rate of conducting static charge away from the secondary battery, thereby helping to reduce the damage to the performance of the secondary battery caused by static electricity accumulation after the viscosity of the first adhesive layer is reduced by static electricity.

[0022] In one or more of the above embodiments, the material of the second adhesive layer includes a sixth material, the sixth material includes at least one of polyacrylate, polyurethane, epoxy resin, and their derivatives, the refractive index of the sixth material is n6, 1.4<n6≤1.6. The solid content of the second adhesive layer is m2, m2>60%.

[0023] In the above embodiment, the viscosity of the second adhesive layer can remain unchanged under conditions such as temperature changes, light and static electricity, which is beneficial to improving the stability of the bonding between the adhesive member and the housing.

[0024] In one or more of the above embodiments, the secondary battery includes a fixing member, and the electrode assembly and the housing are fixedly connected via the fixing member. Along the first direction, the projections of the fixing member and the adhesive member are separated.

[0025] In the above embodiment, staggering the fixing member and the adhesive member along the first direction helps to reduce the total space occupied by the fixing member and the adhesive member in the first direction, thereby further increasing the space available for the secondary battery and further increasing the capacity of the secondary battery.

[0026] In one or more of the above embodiments, the base layer is provided with a crack, and the cracking direction of the crack is not parallel to the first direction.

[0027] In the above embodiment, when the secondary battery is greatly affected by temperature and it is not convenient to reduce the viscosity of the first adhesive layer under high or low temperature conditions to disassemble the secondary battery and the cover body, the secondary battery and the cover body can be separated through the crack first, and then the viscosity of the first adhesive layer remaining on the cover body can be reduced to separate the cover body and the first adhesive layer, which is conducive to the reuse of the cover body.

[0028] In one or more of the above embodiments, the electrical device further includes a restraining member, which is provided on the cover body, and the secondary battery is removably restrained to the cover body through the restraining member.

[0029] In the above embodiment, the restraining member helps to reduce the possibility that the first adhesive layer is accidentally in a state of reduced viscosity, causing the secondary battery to move around in the battery compartment.

[0030] In one or more of the above embodiments, the viscosity of the first adhesive layer can be reduced to be lower than the viscosity of the second adhesive layer, and the viscosity of the first adhesive layer differs from the viscosity of the second adhesive layer by at least 50 N / m.

[0031] In the above embodiment, the viscosity of the first adhesive layer can be reduced to a level significantly different from that of the second adhesive layer, so that the cover is easier to peel off from the adhesive than the secondary battery, which is beneficial to further improve the convenience of disassembling the secondary battery and the cover.

[0032] In one or more of the above embodiments, the cover body is provided with a groove, and at least a portion of the adhesive is accommodated in the groove.

[0033] In the above embodiment, the space occupied by the adhesive component in the electrical equipment can be reduced, which is beneficial to further increase the space available for the secondary battery, thereby further increasing the capacity of the secondary battery.

[0034] In one or more of the above embodiments, the thickness of the second adhesive layer is smaller than the thickness of the first adhesive layer.

[0035] In the above embodiment, since the viscosity of the first adhesive layer can be reduced and the viscosity of the second adhesive layer is fixed, in practical applications, the second adhesive layer can be made thinner than the first adhesive layer, which is beneficial to further increase the space available for the secondary battery, thereby further increasing the capacity of the secondary battery.

[0036] In one or more of the above embodiments, the thickness of the first adhesive layer is 10 micrometers to 50 micrometers, and the thickness of the second adhesive layer is 5 micrometers to 30 micrometers.

[0037] In the above embodiment, within the thickness range of 10 microns to 50 microns, the first adhesive layer is not too thick, which is conducive to further improving the capacity of the secondary battery; the first adhesive layer is not too thin, which is conducive to ensuring the bonding strength between the first adhesive layer and the cover body, reducing the possibility of the secondary battery moving relative to the cover body in the battery compartment, and improving the stability of the secondary battery in the battery compartment. Within the thickness range of 5 microns to 30 microns, the second adhesive layer is not too thick, which is conducive to improving the capacity of the secondary battery; the second adhesive layer is not too thin, which is conducive to ensuring the bonding strength between the second adhesive layer and the shell, further reducing the possibility of the secondary battery moving relative to the cover body in the battery compartment, thereby further improving the stability of the secondary battery in the battery compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 An overall schematic diagram of an electrical device provided in one embodiment of the present application.

[0039] Figure 2 An exploded view of an electrical device provided in one embodiment of the present application.

[0040] Figure 3 For along Figure 2 Cross-section along the midline AA.

[0041] Figure 4 An overall schematic diagram of a secondary battery provided in one embodiment of the present application.

[0042] Figure 5 A schematic diagram of the structure of an adhesive member provided in one embodiment of the present application.

[0043] Main component symbols 10. Electrical equipment; 11. Electrical main body; 111. Battery compartment; 12. Cover; 121. Covering part; 122. First part; 122. Second part; 13. Secondary battery; 131. Shell; 1311. Accommodating cavity; 1312. First wall; 1313. Second wall; 132. Electrode assembly; 1321. First pole piece; 1322. Second pole piece; 1323. Diaphragm; 133. First pole ear; 134. Second pole ear; 14. Adhesive; 141. Base layer; 142. First adhesive layer; 143. Second adhesive layer; 15. Fixing part; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0045] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centrally disposed element at the same time. When an element is considered to be "disposed on" another element, it may be directly disposed on the other element or there may be a centrally disposed element at the same time.

[0046] Unless otherwise specified, the term "plurality" as used herein means two or more than two.

[0047] The terms "first", "second", etc. are only used to distinguish different objects and shall not be understood as indicating or implying relative importance or implying the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0049] It should be understood that, considering the actual processing tolerance factors, in the technical solution of the present application, when the two elements are arranged parallel / vertically and in the same direction, there may be a certain angle between the two elements, and a tolerance of 0-±10% is allowed between the two elements. A tolerance of 0-±10% is allowed between the two elements greater than, equal to or less than.

[0050] An embodiment of the present application provides an electrical device, including an electrical main body, a cover body and a secondary battery. The electrical main body is provided with a battery compartment. The cover body is detachably arranged on the electrical main body and covers the battery compartment. The secondary battery is arranged in the battery compartment and is electrically connected to the electrical main body. The secondary battery includes a shell, an electrode assembly and an adhesive, the shell is provided with a receiving cavity, the electrode assembly is arranged in the receiving cavity, and the adhesive adheres the cover body to the shell. The adhesive includes a base layer, a first adhesive layer and a second adhesive layer. Along the first direction, the first adhesive layer and the second adhesive layer are respectively arranged on different sides of the base layer. The viscosity of the first adhesive layer can be reduced and bonded to the cover body, and the viscosity of the second adhesive layer is fixed and bonded to the shell.

[0051] The adhesive member adheres the secondary battery and the cover body, and the second adhesive layer fixed by adhesiveness is conducive to reducing the possibility of the secondary battery moving in the battery compartment and improving the stability of the secondary battery in the battery compartment. When the secondary battery needs to be disassembled, the cover body and the power-consuming body are disassembled first, and then the secondary battery and the cover body are disassembled by reducing the viscosity of the first adhesive layer, which is conducive to improving the convenience of disassembly. In addition, the secondary battery can be disassembled without the wrapping film, which is conducive to increasing the space available for the secondary battery, thereby facilitating the capacity of the secondary battery.

[0052] Some embodiments of the present application will be described below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0053] See also Figure 1 The embodiment of the present application provides an electric device 10, which includes an electric main body 11 and a cover 12, wherein the cover 12 is detachably disposed on the electric main body 11. The electric device 10 may be a mobile phone, a tablet computer, a laptop computer, a camera, or other equipment.

[0054] In some embodiments, one of the power-consuming body 11 and the cover body 12 is provided with a protruding structure, and the other of the power-consuming body 11 and the cover body 12 is provided with a recessed structure. The cover body 12 and the power-consuming body 11 are fixed by the cooperation of the protruding structure and the recessed structure, and are disassembled by the separation of the protruding structure and the recessed structure.

[0055] In some embodiments, one of the electrical body 11 and the cover body 12 is provided with a snap buckle, and the other of the electrical body 11 and the cover body 12 is provided with a bayonet. The cover body 12 and the electrical body 11 are fixed together by snapping the snap buckle into the bayonet and can be disassembled by snapping the snap buckle out of the bayonet.

[0056] In some embodiments, the electrical body 11 and the cover 12 are connected by gluing.

[0057] In some embodiments, the electrical main body 11 and the cover body 12 are detachably connected via a threaded structure.

[0058] See also Figure 2 The power-consuming body 11 is provided with a battery compartment 111, and the power-consuming device 10 further includes a secondary battery 13, which is provided in the battery compartment 111 and electrically connected to the power-consuming body 11. The cover 12 covers the battery compartment 111. The secondary battery 13 refers to a battery that can be continuously used by activating the active material by charging after discharge.

[0059] In some embodiments, there is a gap between the battery compartment 111 and the secondary battery 13. In this case, the battery compartment 111 can provide space for the secondary battery 13 to expand, which is beneficial to reduce the squeezing of the secondary battery 13 on the power-consuming body 11 when the secondary battery 13 expands.

[0060] See also Figure 3 The secondary battery 13 includes a shell 131 and an electrode assembly 132 . The shell 131 is provided with a receiving cavity 1311 , and the electrode assembly 132 is disposed in the receiving cavity 1311 .

[0061] In some embodiments, the secondary battery 13 is a soft pack battery, and the housing 131 is an aluminum plastic film. In other embodiments, the secondary battery 13 is a steel shell battery, and the housing 131 is a metal shell such as a steel shell and an aluminum shell. The present application does not limit the form of the secondary battery 13.

[0062] In some embodiments, the housing 131 includes a first wall 1312 and a second wall 1313 disposed opposite to each other along a first direction X. The first wall 1312 is located on a side of the secondary battery 13 close to the cover 12 , and the second wall 1313 is located on a side of the secondary battery 13 close to the power-consuming body 11 . The first direction X is parallel to the thickness direction of the secondary battery 13 .

[0063] In some embodiments, the electrode assembly 132 includes a first electrode piece 1321 , a second electrode piece 1322 , and a diaphragm 1323 . The polarities of the first electrode piece 1321 and the second electrode piece 1322 are opposite, and the diaphragm 1323 is disposed between the first electrode piece 1321 and the second electrode piece 1322 .

[0064] In some embodiments, the electrode assembly 132 is a stacked electrode assembly. The first electrode sheet 1321 and the second electrode sheet 1322 are alternately stacked. In other embodiments, the electrode assembly 132 is a wound electrode assembly. The first electrode sheet 1321 and the second electrode sheet 1322 are wound. The present application does not limit the form of the electrode assembly 132.

[0065] In some embodiments, the first pole piece 1321 is a cathode pole piece, and the second pole piece 1322 is an anode pole piece. In other embodiments, the first pole piece 1321 is an anode pole piece, and the second pole piece 1322 is a cathode pole piece.

[0066] See also Figure 4 In some embodiments, the secondary battery 13 further includes a first pole tab 133 and a second pole tab 134. One end of the first pole tab 133 is connected to the first pole piece 1321, and the other end extends out of the housing 131. One end of the second pole tab 134 is connected to the second pole piece 1322, and the other end extends out of the housing 131.

[0067] In some embodiments, the secondary battery 13 further includes a first circuit board (not shown), and the first circuit board is provided with electronic components. The first circuit board cooperates with the electronic components to form a protection circuit to protect the secondary battery 13. For example, the first circuit board cooperates with the electronic components to perform voltage monitoring, current detection, temperature monitoring, and insulation monitoring on the secondary battery 13 to reduce the risk of the secondary battery 13 being in an overcharge, over-discharge, overcurrent, short circuit state, and ultra-high temperature charge and discharge state. The first pole ear 133 and the second pole ear 134 are electrically connected to the first circuit board, respectively.

[0068] In some embodiments, the secondary battery 13 further includes a second circuit board (not shown), one end of the second circuit board is electrically connected to the first circuit board, and the other end of the second circuit board is electrically connected to the power-consuming subject 11 .

[0069] The electric device 10 further includes an adhesive member 14, and the adhesive member 14 adheres the secondary battery 13 and the cover 12. In some embodiments, the adhesive member 14 is disposed on the outer side of the first wall 1312 away from the receiving cavity 1311.

[0070] See also Figure 5 The adhesive member 14 includes a base layer 141, a first adhesive layer 142 and a second adhesive layer 143. Along the first direction X, the first adhesive layer 142 and the second adhesive layer 143 are respectively arranged on different sides of the base layer 141. In some embodiments, the thickness direction of the adhesive member 14 and the thickness direction of the electrical device 10 are parallel to the first direction X.

[0071] See also Figure 2 In some embodiments, the cover body 12 includes a cover portion 121, a first portion 122, and a second portion 123. The first portion 122 and the second portion 123 are arranged relative to the cover portion 121 along the second direction Y. Along the second direction Y, the projections of the first portion 121 and the second portion 122 cover the projection of the adhesive member 14. The first portion 121 and the second portion 122 are conducive to protecting the adhesive member 14. The second direction Y is parallel to the width direction of the secondary battery 13.

[0072] In some embodiments, the cover body 12 further includes a third portion (not shown), which is disposed on the cover portion 121 and connects the first portion 122 and the second portion 123 along the third direction Z. Along the third direction Z, the projection of the third portion covers the projection of the adhesive member 14. The third portion is helpful to further protect the adhesive member 14. The third direction Z is parallel to the length direction of the secondary battery 13. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0073] The first adhesive layer 142 is bonded to the cover body 12, and the second adhesive layer 143 is bonded to the shell 131. The viscosity of the first adhesive layer 142 can be reduced, and the viscosity of the second adhesive layer 143 is fixed. The viscosity of the first adhesive layer 142 can be reduced, which means that the viscosity of the first adhesive layer 142 will be reduced under conditions such as temperature changes, light and static electricity. The fixed viscosity of the second adhesive layer 143 means that the viscosity of the second adhesive layer 143 remains unchanged under conditions such as temperature changes, light and static electricity. It should be noted that the viscosity of the second adhesive layer 143 may decrease with the influence of factors such as time, and is not absolutely completely unchanged. Compared with the second adhesive layer 143, the first adhesive layer 142 is arranged closer to the cover body 12, and the viscosity of the first adhesive layer 142 can be more conveniently reduced through the cover body 12, which is conducive to improving the convenience of disassembling the secondary battery 13.

[0074] The adhesive 14 adheres the secondary battery 13 and the cover 12, and the second adhesive layer 143 fixed by adhesiveness is conducive to reducing the possibility of the secondary battery 13 moving in the battery compartment 111, and improving the stability of the secondary battery 13 in the battery compartment 111. When the secondary battery 13 needs to be disassembled, the cover 12 and the power-consuming body 111 are disassembled first, and then the secondary battery 13 and the cover 12 are disassembled by reducing the viscosity of the first adhesive layer 142, which is conducive to improving the convenience of disassembly. In addition, the secondary battery 13 can be disassembled without the wrapping film, which is conducive to increasing the space available for the secondary battery 13, thereby facilitating increasing the capacity of the secondary battery 13.

[0075] In some embodiments, the situation where the secondary battery 13 needs to be disassembled refers to a situation where the first circuit board or the second circuit board fails, causing the secondary battery 13 to fail to work normally, and the secondary battery 13 needs to be disassembled and repaired.

[0076] In some embodiments, the situation where the secondary battery 13 needs to be disassembled means that the cycle life of the secondary battery 13 is low and it is difficult to support the long-term use of the power-consuming subject 11, and the secondary battery 13 needs to be disassembled and replaced.

[0077] In some embodiments, the viscosity of the first adhesive layer 142 can be reduced to a value lower than that of the second adhesive layer 143, and the viscosity of the first adhesive layer 142 differs from that of the second adhesive layer 143 by at least 50 N / m. In this case, the viscosity of the first adhesive layer 142 can be reduced to a value significantly different from that of the second adhesive layer 143, which can make the cover 12 easier to peel off from the adhesive member 14 than the secondary battery 13, thereby further improving the convenience of disassembling the secondary battery 13 and the cover 12.

[0078] In some other embodiments, the first adhesive layer 142 is bonded to the housing 131, and the second adhesive layer 143 is bonded to the cover 12. When the secondary battery 13 is disassembled and replaced, the adhesive member 14 can remain bonded to the cover 12, which is conducive to the reuse of the adhesive member 14.

[0079] In some embodiments, the thickness of the adhesive 14 is 50 micrometers to 150 micrometers. For example, the thickness of the adhesive 14 is 50 micrometers, 60 micrometers, 80 micrometers, 100 micrometers, 120 micrometers, and 150 micrometers.

[0080] In some embodiments, the thickness of the second adhesive layer 143 is less than the thickness of the first adhesive layer 142. Since the viscosity of the first adhesive layer 142 can be reduced and the viscosity of the second adhesive layer 143 is fixed, in practical applications, the second adhesive layer 143 can be made thinner than the first adhesive layer 142, which is beneficial to further increase the space available for the secondary battery 13, thereby further improving the capacity of the secondary battery 13.

[0081] In some embodiments, the thickness of the first adhesive layer 142 is 10 microns to 50 microns. For example, the thickness of the first adhesive layer 142 is 10 microns, 15 microns, 20 microns, 30 microns and 50 microns. In the thickness range of 10 microns to 50 microns, the first adhesive layer 142 is not too thick, which is beneficial to increase the capacity of the secondary battery 13; the first adhesive layer 142 is not too thin, which is beneficial to ensure the bonding strength between the first adhesive layer 142 and the cover 12, reduce the possibility of the secondary battery 13 moving relative to the cover 12 in the battery compartment 111, and improve the stability of the secondary battery 13 in the battery compartment 111.

[0082] In some embodiments, the thickness of the second adhesive layer 143 is 5 microns to 30 microns. For example, the thickness of the second adhesive layer 143 is 5 microns, 10 microns, 15 microns, 20 microns and 30 microns. In the thickness range of 5 microns to 30 microns, the second adhesive layer 143 is not too thick, which is beneficial to increase the capacity of the secondary battery 13; the second adhesive layer 143 is not too thin, which is beneficial to ensure the bonding strength between the second adhesive layer 143 and the shell 131, reduce the possibility of the secondary battery 13 moving relative to the cover 12 in the battery compartment 111, and improve the stability of the secondary battery 13 in the battery compartment 111.

[0083] In some embodiments, the material of the first adhesive layer 142 includes a first material and a second material, the first material includes at least one of polyacrylate, polyurethane, epoxy resin, and their respective derivatives, and the second material includes at least one of silicon dioxide, aluminum oxide, fluoride, and titanium dioxide. The refractive index of the first material is n1, and the refractive index of the second material is n2, 1.3≤n1≤1.4, 1.3≤n2≤1.4. The solid content of the first adhesive layer is m1, 10%≤m1≤60%. In this case, the viscosity of the first adhesive layer 142 can be reduced under the irradiation of ultraviolet light, and the first adhesive layer 142 is irradiated with ultraviolet light, which is conducive to improving the convenience of disassembling the secondary battery 13 and the cover 12. In addition, the negative impact of ultraviolet light on the secondary battery 13 is low. When the secondary battery 13 and the cover 12 are disassembled by ultraviolet light irradiation to repair the secondary battery 13, it is conducive to reducing the damage to the performance of the secondary battery 13.

[0084] In some embodiments, the wavelength of the ultraviolet light ranges from 10 nanometers to 400 nanometers. In some embodiments, the adhesion of the first material under ultraviolet light is 1 N / cm 2 Up to 10N / cm 2 .

[0085] In some embodiments, the light transmittance of the portion of the cover 12 that overlaps with the projection of the first adhesive layer 142 is greater than 70% along the first direction X. In this case, it is beneficial for the ultraviolet light to better irradiate the first adhesive layer 142 through the cover 12 along the first direction X, thereby facilitating faster reduction of the viscosity of the first adhesive layer 142 and further improving the convenience of disassembling the secondary battery 13 and the cover 12.

[0086] In some embodiments, the material of the first adhesive layer 142 includes a third material and a fourth material, the third material includes at least one of polyacrylate, polyurethane, epoxy resin, and their derivatives, and the fourth material includes at least one of silicone oil, fluoride, wax, and surfactant. The solid content of the first adhesive layer 142 is m1, 10%≤m1≤60%. In this case, the viscosity of the first adhesive layer 142 can be reduced under low temperature conditions. By reducing the temperature of the first adhesive layer 142, it is helpful to improve the convenience of disassembling the secondary battery 13 and the cover 12.

[0087] In some embodiments, the low temperature condition refers to -30°C to -10°C, and the viscosity of the first adhesive layer 142 can be reduced when it lasts for 5 minutes to 10 minutes under the low temperature condition, and the damage to the performance of the secondary battery 13 can be reduced under such low temperature conditions and duration. In some embodiments, the viscosity of the first adhesive layer 142 can be reduced at any temperature between -30°C and -10°C by changing the component ratio of the third material and the fourth material and the solid content of the first adhesive layer 142.

[0088] In some embodiments, the material of the first adhesive layer 142 includes a fifth material and a fourth material, the fifth material includes at least one of polyacrylate, polyurethane, epoxy resin, phenolic resin, silicone rubber, and their respective derivatives, and the fourth material includes at least one of silicone oil, fluoride, wax, and surfactant. The solid content of the first adhesive layer 142 is m1, 10%≤m1≤60%. In this case, the viscosity of the first adhesive layer 142 can be reduced under high temperature conditions, and by increasing the temperature of the first adhesive layer 142, it is beneficial to improve the convenience of disassembling the secondary battery 13 and the cover 12.

[0089] In some embodiments, the high temperature condition refers to 65° C. to 85° C., and the viscosity of the first adhesive layer 142 can be reduced when it lasts for 5 to 10 minutes under the high temperature condition, and the damage to the performance of the secondary battery 13 can be reduced under such high temperature conditions and duration. In some embodiments, the viscosity of the first adhesive layer 142 can be reduced at any temperature between 65° C. and 85° C. by changing the component ratio of the fifth material to the fourth material and the solid content of the first adhesive layer 142.

[0090] In some embodiments, the cover 12 is made of metal, which is beneficial to improving the thermal conductivity of the cover 12 and the cooling rate or heating rate of the first adhesive layer 142, thereby reducing the viscosity of the first adhesive layer 142 more quickly and further improving the convenience of disassembling the secondary battery 13 and the cover 12.

[0091] In some embodiments, the base layer 141 is provided with a crack (not shown), and the crack direction is not parallel to the first direction X. In this case, when the secondary battery 13 is greatly affected by temperature and it is not convenient to reduce the viscosity of the first adhesive layer 142 under high temperature conditions or low temperature conditions to disassemble the secondary battery 13 and the cover body 12, the secondary battery 13 and the cover body 12 can be separated through the crack first, and then the viscosity of the first adhesive layer 142 remaining on the cover body 12 can be reduced to separate the cover body 12 and the first adhesive layer 142, so as to facilitate the reuse of the cover body 12.

[0092] In some embodiments, the electrical device 10 further includes a restraining member (not shown), which is disposed on the cover 12, and the secondary battery 13 is removably restrained to the cover 12 through the restraining member. The restraining member is helpful in reducing the possibility that the first adhesive layer 142 is accidentally in a state of reduced viscosity, causing the secondary battery 13 to move in the battery compartment 111. It should be noted that the first adhesive layer 142 accidentally being in a state of reduced viscosity may be caused by the electrical device 10 accidentally being in a high temperature condition (such as the secondary battery 13 itself heating up, the poor heat dissipation performance of the electrical main body 11 and the cover 12 leading to high temperature) or low temperature condition.

[0093] In some embodiments, the cover 12 is provided with a groove (not shown), and at least part of the adhesive 14 is accommodated in the groove. In this case, the space occupied by the adhesive 14 in the electrical device 10 can be reduced, which is conducive to further increasing the space that can be set for the secondary battery 13, thereby facilitating further increasing the capacity of the secondary battery 13. In addition, when the viscosity of the first adhesive layer 142 is reduced under high temperature conditions or low temperature conditions, the heat conduction path from the cover 12 to the first adhesive layer 142 can be shortened through the groove, which is conducive to increasing the cooling rate or heating rate of the first adhesive layer 142, thereby facilitating faster reduction of the viscosity of the first adhesive layer 142, and further improving the convenience of disassembling the secondary battery 13 and the cover 12.

[0094] In some embodiments, the material of the first adhesive layer 142 includes at least one of polyaniline, polypyrrole and polythiophene, and the solid content of the first adhesive layer 142 is m1, 10%≤m1≤60%. In this case, the viscosity of the first adhesive layer 142 can be reduced under static electricity conditions, and by allowing static electricity to flow through the cover body 12, it is beneficial to improve the convenience of disassembling the secondary battery 13 and the cover body 12.

[0095] In some embodiments, the material of the first adhesive layer 142 further includes at least one of alkyl sulfate, quaternary ammonium salt of alkylbenzene sulfonate, amine salt, polyethylene glycol and polyoxyethylene. In this case, it is beneficial to reduce the resistivity of the first adhesive layer 142, and to increase the rate of conducting static charge away from the secondary battery 13, thereby helping to reduce the damage to the performance of the secondary battery 13 caused by static electricity accumulation after the viscosity of the first adhesive layer 142 is reduced by static electricity.

[0096] In some embodiments, the material of the first adhesive layer 142 further includes at least one of conductive polyurethane, conductive polyamide, nanotube coating, and graphene coating. In this case, the first adhesive layer 142 can provide a low resistance path for conducting static charge away from the secondary battery 13, which is beneficial to increase the rate of conducting static charge away from the secondary battery 13, thereby helping to reduce the damage to the performance of the secondary battery 13 caused by static electricity accumulation after the viscosity of the first adhesive layer 142 is reduced by static electricity.

[0097] In some embodiments, the material of the second adhesive layer 143 includes a sixth material, the sixth material includes at least one of polyacrylate, polyurethane, epoxy resin, and their respective derivatives, and the refractive index of the sixth material is n6, 1.4<n6≤1.6. The solid content of the second adhesive layer 143 is m2, m2>60%. In this case, the viscosity of the second adhesive layer 143 can remain unchanged under conditions such as temperature changes, light and static electricity, which is beneficial to improve the stability of the bonding between the adhesive 14 and the housing 131. It can be understood that m2<100%.

[0098] In some embodiments, the sixth material has an adhesive force greater than 10 N / cm2 under ultraviolet light. 2 And less than or equal to 20N / cm 2 .

[0099] In some embodiments, the number of adhesive members 14 is two, and the two adhesive members 14 are arranged at intervals. Compared with a whole large adhesive member 14 adhering the secondary battery 13 and the cover body 12, the two adhesive members 14 adhering the secondary battery 13 and the cover body 12 by the interval arrangement are, on the one hand, conducive to reducing the space required for the adhesive member 14 to further increase the capacity of the secondary battery 13. On the other hand, it is conducive to improving the convenience of disassembling the secondary battery 13. In other embodiments, according to the size of the secondary battery 13, the number of adhesive members 14 can also be three, four or more.

[0100] In some embodiments, two adhesive members 14 are spaced apart along the second direction Y.

[0101] In some embodiments, two adhesive members 14 are spaced apart along the third direction Z.

[0102] See also Figure 3In some embodiments, the secondary battery 13 includes a fixing member 15, and the electrode assembly 132 is fixedly connected to the housing 131 through the fixing member 15. Along the first direction X, the projections of the fixing member 15 and the adhesive member 14 are separated. By staggering the fixing member 15 and the adhesive member 14 along the first direction X, it is helpful to reduce the total space occupied by the fixing member 15 and the adhesive member 14 in the first direction X, thereby further increasing the space available for the secondary battery 13 and further increasing the capacity of the secondary battery 13.

[0103] In some embodiments, the fixing member 15 is a hot melt adhesive, and when the secondary battery 13 and the cover 12 are disassembled, the viscosity of the first adhesive layer 142 is reduced under low temperature, ultraviolet light or static electricity. In this way, compared with reducing the viscosity of the first adhesive layer 142 under high temperature conditions, it is helpful to reduce the aging of the hot melt adhesive, thereby helping to reduce the risk of failure of the hot melt adhesive.

[0104] In some embodiments, the fixing member 15 is disposed on the inner side of the second wall 1313 near the receiving cavity 1311. The fixing member 15 is far away from the adhesive member 14. When the viscosity of the first adhesive layer 142 is reduced by high temperature, it is beneficial to reduce the influence of high temperature on the fixing member 15 and improve the stability of the electrode assembly 132 relative to the shell 131.

[0105] In some embodiments, the number of the fixing members 15 is two, and the two fixing members 15 are arranged at intervals.

[0106] In some embodiments, along the second direction Y, the width of the fixing member 15 is 15 mm to 40 mm. For example, the width of the fixing member 15 is 15 mm, 20 mm, 30 mm or 40 mm. It is understood that the width of the fixing member 15 is not limited thereto, and the width of the fixing member 15 can be adaptively adjusted according to the width of the electrode assembly 132. In some embodiments, along the third direction Z, the ratio of the length of the fixing member 15 to the length of the electrode assembly 132 is approximately 2 / 3.

[0107] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not intended to limit the present application. As long as they are within the essential scope of the present application, appropriate changes and modifications to the above embodiments are within the scope disclosed in the present application.

Claims

1. An electrical device, characterized in that: include: An electricity-consuming body, wherein the electricity-consuming body is provided with a battery compartment; A cover body, which is detachably disposed on the power-consuming body and covers the battery compartment; A secondary battery, the secondary battery is arranged in the battery compartment and is electrically connected to the power-consuming subject; the secondary battery comprises a housing and an electrode assembly, the electrode assembly is arranged in the housing; An adhesive member, the adhesive member comprising a base layer, a first adhesive layer and a second adhesive layer; Along the first direction, the first adhesive layer and the second adhesive layer are respectively arranged on different sides of the base layer; the viscosity of the first adhesive layer can be reduced and bonded to the cover body, and the viscosity of the second adhesive layer is fixed and bonded to the shell.

2. The electrical equipment according to claim 1, characterized in that: The material of the first adhesive layer includes a first material and a second material, the first material includes at least one of polyacrylate, polyurethane, epoxy resin, and their respective derivatives, and the second material includes at least one of silicon dioxide, aluminum oxide, fluoride and titanium dioxide; the refractive index of the first material is n1, and the refractive index of the second material is n2, 1.3≤n1≤1.4, 1.3≤n2≤1.4; the solid content of the first adhesive layer is m1, 10%≤m1≤60%.

3. The electrical equipment according to claim 2, characterized in that: Along the first direction, the light transmittance of a portion of the cover body that overlaps with a projection of the first adhesive layer is greater than 70%.

4. The electrical equipment according to claim 1, characterized in that: The material of the first adhesive layer includes a third material and a fourth material, the third material includes at least one of polyacrylate, polyurethane, epoxy resin, and their respective derivatives, and the fourth material includes at least one of silicone oil, fluoride, wax and surfactant; the solid content of the first adhesive layer is m1, 10%≤m1≤60%.

5. The electrical equipment according to claim 1, characterized in that: The material of the first adhesive layer includes a fifth material and a fourth material, the fifth material includes at least one of polyacrylate, polyurethane, epoxy resin, phenolic resin, silicone rubber, and their respective derivatives, and the fourth material includes at least one of silicone oil, fluoride, wax and surfactant; the solid content of the first adhesive layer is m1, 10%≤m1≤60%.

6. The electrical equipment according to claim 4 or 5, characterized in that: The material of the cover body includes metal material.

7. The electrical equipment according to claim 1, characterized in that: The material of the first adhesive layer includes at least one of polyaniline, polypyrrole and polythiophene; the solid content of the first adhesive layer is m1, 10%≤m1≤60%.

8. The electrical equipment according to claim 7, characterized in that: The material of the first adhesive layer further includes at least one of alkyl sulfate, alkylbenzene sulfonate quaternary ammonium salt, amine salt, polyethylene glycol and polyoxyethylene.

9. The electrical equipment according to claim 7, characterized in that: The material of the first adhesive layer also includes at least one of conductive polyurethane, conductive polyamide, nanotube coating and graphene coating.

10. The electrical equipment according to claim 1, characterized in that: The material of the second adhesive layer includes a sixth material, and the sixth material includes at least one of polyacrylate, polyurethane, epoxy resin, and their respective derivatives. The refractive index of the sixth material is n6, 1.4<n6≤1.6; the solid content of the second adhesive layer is m2, m2>60%.

11. The electrical equipment according to claim 1, characterized in that: The secondary battery comprises a fixing member, and the electrode assembly is fixedly connected to the shell through the fixing member; along the first direction, the projections of the fixing member and the adhesive member are separated.

12. The electrical equipment according to claim 1, characterized in that: The base layer is provided with a crack, and the cracking direction of the crack is not parallel to the first direction.

13. The electrical equipment according to claim 1, characterized in that: The electrical device further includes a restraining member, which is disposed on the cover body, and the secondary battery is removably restrained to the cover body through the restraining member.

14. The electrical equipment according to claim 1, characterized in that: The viscosity of the first adhesive layer can be reduced to be lower than the viscosity of the second adhesive layer, and the viscosity of the first adhesive layer differs from the viscosity of the second adhesive layer by at least 50 N / m.

15. The electrical equipment according to claim 1, characterized in that: The cover body is provided with a groove, and at least a part of the adhesive is accommodated in the groove.

16. The electrical equipment according to any one of claims 1 to 15, characterized in that: The thickness of the second adhesive layer is smaller than the thickness of the first adhesive layer.

17. The electrical equipment according to claim 16, characterized in that: The thickness of the first adhesive layer is 10 micrometers to 50 micrometers, and the thickness of the second adhesive layer is 5 micrometers to 30 micrometers.

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