Battery assembly and electric device

Abstract

A battery assembly and an electric device. The battery assembly comprises a battery and a bonding member. The battery comprises a packaging bag and a tab. The packaging bag comprises a top wall and a first side wall, and the packaging bag comprises a first sealing part. The first sealing part is connected to the top wall, and the tab extends out of the first sealing part. The bonding member comprises a first bonding layer, a second bonding layer, and a conductive layer. The first bonding layer is connected to the first side wall. The second bonding layer is configured to be connected to an external battery compartment. One side of the conductive layer is connected to the first bonding layer, and the other side of the conductive layer is at least partially connected to the second bonding layer. The conductive layer comprises a first body and a first extension section connected to the first body, the first body is connected to the first side wall, and the first extension section extends to the side of a second side wall away from the first side wall or the side of the first sealing part away from the first side wall. The second bonding layer is configured such that: when the conductive layer and the external battery compartment are electrified, the second bonding layer has weakened viscosity or loses viscosity. The battery assembly can reduce the risk of damaging the battery and improve the space utilization rate.

Description

Battery components and electrical equipment Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery assembly and electrical equipment. Background Art

[0002] Battery packs are currently widely used in various electronic devices, including mobile phones and tablets. Batteries are typically installed in a battery compartment, secured there using double-sided tape or easy-to-tear stickers. This makes it difficult to remove the battery from the compartment, can easily damage the battery, shorten its lifespan, and pose safety risks. Summary of the Invention

[0003] In view of this, it is necessary to provide a battery assembly and an electrical device that can facilitate the removal of the battery and the battery compartment.

[0004] Embodiments of the present application provide a battery assembly comprising a battery and an adhesive. The adhesive is used to adhere the battery to an external battery compartment. The battery includes a packaging bag and a tab. The packaging bag includes a top wall, a bottom wall, a first side wall, and a second side wall. The top and bottom walls are arranged along a first direction. The first and second side walls are arranged along a second direction. The first side wall connects the top and bottom walls. The second side wall connects the top and bottom walls. The packaging bag includes a first sealing portion. The first sealing portion connects to the top wall, and the tab extends from the first sealing portion. The first direction is perpendicular to the second direction, which is the thickness direction of the battery. The adhesive includes a first adhesive layer, a second adhesive layer, and a conductive layer. The first adhesive layer connects to the first side wall. The second adhesive layer is configured to connect to the external battery compartment. One side of the conductive layer connects to the first adhesive layer, and the other side at least partially connects to the second adhesive layer. The conductive layer includes a first body and a first extension connected to the first body. The first body connects to the first side wall, and the first extension extends to the second side wall or the side of the first sealing portion facing away from the first side wall. The second adhesive layer is configured to weaken or disappear when power is applied between the conductive layer and the external battery compartment. This weakening or disappearing of the second adhesive layer when power is applied between the conductive layer and the battery compartment facilitates removal of the battery from the battery compartment, reducing the risk of battery damage. Extending the first extension segment to the side of the first sealing portion facing away from the first sidewall reduces the space occupied by the first extension segment in the second direction, thereby improving space utilization.

[0005] In one or more optional embodiments above, along the second direction, the projection of the first body is located within the projection range of the first side wall. The first extension section includes a first section, a second section, and a third section connected in sequence. The first section is connected to the first body, and the first section is located on the side of the first sealing portion close to the first side wall. The second section is located on the side of the first sealing portion away from the top wall. The third section is located on the side of the first sealing portion away from the first side wall, and at least part of the third section is exposed to the battery. Along the first direction, the projections of the first section, the second section, and the third section are all located within the projection range of the top wall, which is beneficial to reducing the thickness space occupied by the first extension section, so that the first extension section does not exceed the first side wall and the second side wall, which is beneficial to reducing the thickness of the battery assembly.

[0006] In one or more optional embodiments above, the first adhesive layer includes a second body and a second extension segment connected to the second body. One side of the second body is connected to the first body, and the other side of the second body is connected to the first side wall. One side of the second extension segment is connected to the first extension segment, and the other side of the second extension segment is connected to the first sealing portion. Along the second direction, the projection of the first body, the projection of the second body, and the projection of the second adhesive layer are all located within the projection range of the first side wall, thereby increasing the area of ​​the first adhesive layer connected to the battery, improving the connection strength between the first adhesive layer and the battery, and reducing the space occupied in the second direction.

[0007] In one or more optional embodiments above, the adhesive further comprises an insulating layer. The insulating layer covers the first section and the second section on a side facing away from the second extension section. The third section on a side facing away from the second extension section is at least partially exposed to the insulating layer. Along the second direction, the projection of the insulating layer overlaps with the projection of the second adhesive layer. Due to fitting tolerances, a gap is likely to appear between the insulating layer and the second adhesive layer, and the conductive layer in the gap is likely to short-circuit with the battery compartment. By partially overlapping the insulating layer and the second adhesive layer, the generation of the gap can be reduced, further reducing the risk of a short circuit caused by contact between the conductive layer and the battery compartment.

[0008] In one or more optional embodiments above, along the second direction, the width L1 of the overlapping portion of the insulating layer and the second adhesive layer satisfies 0<L1<2mm, thereby achieving insulation and reducing the thickness space occupied by the overlapping portion.

[0009] In one or more of the above optional embodiments, the second adhesive layer includes a third body. One side of the third body is connected to the first body, and the other side of the third body is used to connect to the battery compartment. Along the second direction, the projection of the first body, the projection of the second body, and the projection of the third body are all located within the projection range of the first side wall, and the projection of the insulating layer overlaps with the projection of the third body.

[0010] In one or more optional embodiments above, the second adhesive layer includes a third body and a third extension segment. One side of the third body is connected to the first body, and the other side of the third body is used to connect to the battery compartment. Along the second direction, the projection of the first body, the projection of the second body, and the projection of the third body are all located within the projection range of the first side wall. The third extension segment includes a fourth section, a fifth section, and a sixth section connected in sequence. The fourth section is connected to the third body, one side of the fourth section is connected to the first section, and one side of the fifth section is connected to the second section. One side of the sixth section is connected to the third section. The third section is at least partially exposed to the sixth section. The insulating layer covers the side of the fourth section, the fifth section, and the sixth section away from the first extension segment. Due to the gap between the first sealing portion and the inner wall of the battery compartment, the second adhesive layer is prone to adsorb impurities such as dust and debris. By covering the third extension segment with an insulating layer, the adsorption of impurities such as dust and debris on the second adhesive layer can be reduced.

[0011] In one or more of the above optional embodiments, the battery further includes a first protective layer. The first protective layer connects the first sidewall, the first sealing portion, and the second sidewall. The tab and at least a portion of the first sealing portion are located within the first protective layer. The first adhesive layer is connected to the first protective layer. Along the second direction, the projection of the insulating layer on the first sidewall is separated from the projection of the first protective layer on the first sidewall, thereby reducing overlap between the insulating layer and the first protective layer, reducing the thickness space occupied, and facilitating a reduction in the thickness of the battery.

[0012] In one or more of the above optional embodiments, the battery includes an electrode assembly and an adapter disposed within a packaging bag. The adapter connects the electrode assembly and the tab. Along the second direction, the projection of the insulating layer is spaced apart from the projection of the adapter, thereby reducing overlap between the insulating layer and the adapter and the space occupied, thereby facilitating a reduction in the thickness of the battery.

[0013] In one or more optional embodiments above, the conductive layer includes a base layer and a conductive sublayer, wherein the base layer is connected to the first adhesive layer, and the conductive sublayer is connected to a side of the base layer facing away from the first adhesive layer.

[0014] In one or more optional embodiments above, the battery assembly includes two adhesive members. When viewed along the second direction, the two adhesive members are spaced apart in the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0015] In one or more optional embodiments above, the adhesive member includes a first connecting section, the first connecting section extends to the second side wall or the side of the first sealing portion away from the first side wall, the first connecting section is provided with an exposure hole, and the conductive layer is exposed in the exposure hole. The positive pole of the external circuit is connected to the conductive layer through the exposure hole, and the negative pole is connected to the battery compartment, or the negative pole of the external circuit is connected to the conductive layer through the exposure hole, and the positive pole is connected to the battery compartment. By exposing the conductive layer in the form of an exposure hole, the manufacturing process is optimized, and the first adhesive layer, the conductive layer and the third adhesive layer are easily composited into an adhesive member. It can also reduce the risk of short circuit caused by electrical connection with external conductive members, and improve the structural strength of the first connecting section. If necessary, force can be applied to the first connecting section to remove the battery from the battery compartment.

[0016] In one or more of the above optional embodiments, the adhesive member includes an insulating layer, and along the second direction, the first adhesive layer, the conductive layer, the second adhesive layer, and the insulating layer are stacked in sequence in the first connecting section, the first adhesive layer in the first connecting section is connected to the second side wall or the side of the first sealing portion facing away from the first side wall, and the exposure hole penetrates the second adhesive layer and the insulating layer along the second direction. This reduces the risk of a short circuit caused by contact between the conductive layer and the battery compartment.

[0017] In one or more of the above optional embodiments, in the first direction, the projection of the conductive layer located in the first connecting section along the second direction is located within the projection of the second adhesive layer and the insulating layer along the second direction, or the ends of the first adhesive layer, the conductive layer, the second adhesive layer, and the insulating layer located in the first connecting section are flush with each other, thereby reducing the risk of the conductive layer contacting the battery compartment and causing a short circuit.

[0018] In one or more optional embodiments above, the adhesive member includes a second connecting segment, and along the second direction, the battery is located between the second connecting segment and the first connecting segment. Along the second direction, the second adhesive layer, the conductive layer and the first adhesive layer located in the second connecting segment are stacked in sequence, and the first adhesive layer located in the second connecting segment is connected to the first side wall.

[0019] In one or more of the above optional embodiments, the battery further includes a protective plate, which is disposed on the top wall and connected to the tab. The adhesive member covers the protective plate and the first sealing portion. The first connecting section is connected to the second side wall, and the second connecting section is connected to the first side wall. The protective plate and the first sealing portion are insulated and protected.

[0020] In one or more of the above optional embodiments, the battery further includes a protective plate, which is arranged on the top wall and connected to the pole ear. The first sealing portion extends along the first direction. Along the second direction, the protective plate is located on the side of the first sealing portion away from the first side wall, and the first connecting section extends to the side of the protective plate away from the first sealing portion.

[0021] One embodiment of the present application further provides an electrical device comprising the battery assembly of any of the above embodiments, wherein the electrical device comprises a battery compartment, wherein a second adhesive layer is connected to the battery compartment, and wherein the second adhesive layer is configured to weaken or lose its viscosity when power is applied between the conductive layer and the battery compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic structural diagram of a battery assembly and a battery compartment in some embodiments.

[0023] FIG2 is a schematic structural diagram of a battery assembly and a battery compartment viewed along a direction opposite to the second direction Y in some embodiments.

[0024] FIG3 shows a cross-sectional schematic diagram of the battery assembly and the battery compartment in the embodiment of FIG2 .

[0025] FIG4 shows an exploded schematic diagram of a battery assembly in some embodiments.

[0026] FIG5 shows a simplified cross-sectional view of a battery assembly and battery in some embodiments.

[0027] FIG. 6 shows an exploded schematic diagram of an adhesive component in some embodiments.

[0028] FIG7 shows a schematic structural diagram of a battery assembly in some embodiments.

[0029] FIG8 is a schematic structural diagram of the battery assembly in the embodiment of FIG7 from another perspective.

[0030] FIG9 shows a schematic structural diagram of the battery assembly in the embodiment of FIG7 from another perspective.

[0031] FIG10 shows a cross-sectional schematic diagram of the battery assembly in the embodiment of FIG7 .

[0032] FIG. 11 is a schematic diagram showing an enlarged structure of point A in FIG. 10 .

[0033] FIG. 12 is a schematic diagram showing an enlarged structure of point B in FIG. 10 .

[0034] FIG13 shows a schematic structural diagram of a battery assembly in some other embodiments.

[0035] FIG14 shows a cross-sectional schematic diagram of the battery assembly in the embodiment of FIG13 .

[0036] FIG15 is a schematic diagram showing an enlarged structure of point C in FIG14 .

[0037] FIG. 16 is a schematic diagram showing an enlarged structure of point D in FIG. 14 .

[0038] FIG17 is a schematic diagram showing the structure of a battery assembly in some embodiments.

[0039] FIG18 shows a schematic structural diagram of a battery assembly in some further embodiments.

[0040] FIG19 shows a schematic structural diagram of the battery assembly in FIG18 from another perspective.

[0041] FIG20 shows a schematic structural diagram of the battery assembly in FIG18 from another perspective.

[0042] FIG21 shows a schematic structural diagram of a battery assembly in some further embodiments.

[0043] FIG22 shows a schematic structural diagram of the battery assembly in FIG21 from another perspective.

[0044] FIG23 shows a schematic structural diagram of the battery assembly in FIG21 from another perspective.

[0045] FIG24 shows a schematic structural diagram of the battery assembly in FIG21 from another perspective.

[0046] FIG25 shows a schematic structural diagram of a battery assembly in some further embodiments.

[0047] FIG26 shows a schematic structural diagram of a battery assembly in some further embodiments.

[0048] FIG27 shows a schematic structural diagram of a battery assembly in some other embodiments.

[0049] FIG28 shows a schematic structural diagram of a battery assembly and a battery compartment in some other embodiments.

[0050] FIG. 29 is an exploded schematic diagram showing the adhesive member in FIG. 26 .

[0051] FIG30 is a schematic structural diagram of the adhesive member in FIG26.

[0052] FIG31 shows a schematic structural diagram of adhesive components in other embodiments.

[0053] FIG32 shows a schematic structural diagram of adhesive components in some further embodiments.

[0054] FIG33 shows a schematic cross-sectional view along II-II of FIG28 .

[0055] FIG34 shows a schematic structural diagram of a battery assembly in some other embodiments.

[0056] FIG35 shows a schematic structural diagram of electrical equipment in some embodiments.

[0057] : Description of the main component symbols: Battery assembly 100 Battery 10 Packaging bag 11 Main body 11a Top wall 111 Bottom wall 112 First side wall 113 Second side wall 114 Third side wall 115 Fourth side wall 116 Sealing portion 11b First sealing portion 101 Second sealing portion 102 Receiving space 103 Tab 12 First protective layer 13 Protective plate 14 Elastic member 14a Adapter 15 Second protective layer 16 First opening 161 Second opening 162 Adhesive member 20 Conductive layer 21 Base layer 21a Conductive sublayer 21b First body 211 First extension section 212 First segment 212a Second segment 212bThird section 212c First adhesive layer 22 Second body 221 Second extension section 222 Second adhesive layer 23 First edge 23a Second edge 23b Third body 231 Third extension section 232 Fourth section 232a Fifth section 232b Sixth section 232c Insulation layer 24 First connecting section 210 Exposure hole 210a Second connecting section 220 Third connecting section 230 Protective film 100a Tear-off portion 110 External device 200 Battery compartment 201 Electrical device 300 First direction X Second direction Y Third direction Z

[0058] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0059] The following detailed description is illustrative and non-limiting. It is intended to provide a basic understanding of the present application and is not intended to identify the key or decisive elements of the present application or to limit the scope of protection. As long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any manner.

[0060] When a component is referred to as being “disposed on” another component, it can be directly disposed on the other component or there may be a component intervening therebetween. When a component is referred to as being “connected to” another component, it can be directly connected to the other component or there may be a component intervening therebetween.

[0061] It can be understood that the term "perpendicular" is used to describe the ideal state between two components. In actual production or use, there may be a state between the two components that is approximately perpendicular or equal. For example, combined with numerical descriptions, perpendicular can refer to the angle between two straight lines being in the range of 90°±10°, perpendicular can also refer to the dihedral angle between two planes being in the range of 90°±10°, and perpendicular can also refer to the angle between a straight line and a plane being in the range of 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0062] The terms “vertical,” “horizontal,” “left,” “right,” “top,” “bottom,” “front,” “back,” and similar expressions used herein are for illustrative purposes only and are not intended to limit this application.

[0063] Unless otherwise defined, the term "plurality" herein, when used to describe the number of components, specifically means that the components are two or more.

[0064] Embodiments of the present application provide a battery assembly comprising a battery and an adhesive. The adhesive is used to adhere the battery to a battery compartment. The battery includes a packaging bag and a tab. The packaging bag includes a top wall, a bottom wall, a first side wall, and a second side wall. The top wall and bottom wall are arranged along a first direction. The first side wall and the second side wall are arranged along a second direction. The first side wall connects the top wall and the bottom wall. The second side wall connects the top wall and the bottom wall. The packaging bag includes a first sealing portion. The first sealing portion connects to the top wall, and the tab extends from the first sealing portion. The first direction is perpendicular to the second direction, which is the thickness direction of the battery. The adhesive includes a first adhesive layer, a second adhesive layer, and a conductive layer. The first adhesive layer connects to the first side wall. The second adhesive layer is configured to connect to the battery compartment. One side of the conductive layer is connected to the first adhesive layer, and the other side is at least partially connected to the second adhesive layer. The conductive layer includes a first body and a first extension connected to the first body. The first body connects to the first side wall, and the first extension partially extends to the second side wall or the side of the first sealing portion facing away from the first side wall. The second adhesive layer is configured to weaken or disappear when power is applied between the conductive layer and the battery compartment. This weakening or disappearing of the second adhesive layer facilitates removal of the battery from the battery compartment, reducing the risk of battery damage. Extending the first extension segment to the side of the first sealing portion facing away from the first sidewall reduces the space occupied by the first extension segment in the second direction, improving space utilization.

[0065] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features of the embodiments may be combined with each other.

[0066] Referring to Figures 1 to 6, the first embodiment of the present application provides a battery assembly 100, including a battery 10 and an adhesive 20, wherein the adhesive 20 is used to adhere the battery 10 to the battery compartment 201 of the external electrical device 200. The battery compartment 201 in the present application should be understood as a chamber in the electrical device 200 for accommodating the battery 100, and its shape and size are designed according to the shape and size of the battery used, such as a chamber in the metal middle frame of a mobile phone for accommodating the battery 100, or a chamber formed by the display screen and other devices of a mobile phone to accommodate the battery 100. The chamber may be sealed or unsealed, and the present application does not limit the type and structure of the battery compartment.

[0067] In some embodiments, the battery 10 includes a packaging bag 11 and a tab 12 , wherein the tab 12 extends out of the packaging bag 11 .

[0068] In some embodiments, the battery 10 includes an electrode assembly (not shown), which is disposed in a packaging bag 11 , and a tab 12 is connected to the electrode assembly.

[0069] In some embodiments, the packaging bag 11 includes a main body 11a and a sealing portion 11b, wherein the main body 11a is connected to the sealing portion 11b. The electrode assembly is disposed in the main body 11a, and the tab 12 extends from the sealing portion 11b.

[0070] In some embodiments, the main body 11a includes a top wall 111, a bottom wall 112, a first side wall 113, and a second side wall 114. The top wall 111 and the bottom wall 112 are arranged along a first direction X, and the first side wall 113 and the second side wall 114 are arranged along a second direction Y. The first side wall 113 connects the top wall 111 and the bottom wall 112, and the second side wall 114 connects the top wall 111 and the bottom wall 112. The sealing portion 11b includes a first sealing portion 101, which is connected to the top wall 111. The tab 12 extends from the first sealing portion 101. The first direction X is perpendicular to the second direction Y, and the second direction Y is the thickness direction of the battery 10.

[0071] In some embodiments, the main body 11a includes a third side wall 115 and a fourth side wall 116 arranged along a third direction Z. The third side wall 115 connects the top wall 111, the bottom wall 112, the first side wall 113, and the second side wall 114. The fourth side wall 116 connects the top wall 111, the bottom wall 112, the first side wall 113, and the second side wall 114. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0072] In some embodiments, the sealing portion 11 b includes two second sealing portions 102 , wherein one second sealing portion 102 is connected to the third side wall 115 , and the other second sealing portion 102 is connected to the fourth side wall 116 .

[0073] In some embodiments, the adhesive member 20 includes a conductive layer 21, a first adhesive layer 22, and a second adhesive layer 23. The first adhesive layer 22 is connected to the first side wall 113, and the second adhesive layer 23 is used to connect to the battery compartment 201. One side of the conductive layer 21 is connected to the first adhesive layer 22, and the other side is at least partially connected to the second adhesive layer 23. The conductive layer 21 includes a first body 211 and a first extension section 212 connected to the first body 211. The first body 211 is connected to the first side wall 113, and the first extension section 212 partially extends to the second side wall 114 or the side of the first sealing portion 101 away from the first side wall 113 to connect to an external power source. The second adhesive layer 23 is configured to weaken or disappear when electricity is applied between the conductive layer 21 and the battery compartment 201.

[0074] The present application facilitates the removal of the battery 10 from the battery compartment 201 and reduces the risk of damaging the battery 10 by weakening or eliminating the viscosity of the second adhesive layer 23 when power is applied between the conductive layer 21 and the battery compartment 201. The first extension section 212 is partially extended to the side of the first sealing portion 101 away from the first side wall 113, which can reduce the space occupied by the first extension section 212 in the second direction Y and improve space utilization.

[0075] It can be understood that the battery compartment 201 is conductive. When voltage is applied to the conductive layer 21 and the battery compartment 201, the anions in the second adhesive layer 23 move toward the positive electrode and the cations move toward the negative electrode. The ions are deposited on the surface of the battery compartment 201, hindering the adhesion of the second adhesive layer 23, so the viscosity is weakened or disappears. After the voltage is applied, as time goes by, the ions moved to the positive and negative electrodes disperse, and the adhesion of the second adhesive layer 23 will gradually recover, so that the battery 10 can be re-bonded to the battery compartment 201.

[0076] 6 to 11 , in some embodiments, along the second direction Y, the projection of the first body 211 is located within the projection range of the first sidewall 113 , which can reduce the space occupied by the first body 211 in the first direction X.

[0077] In some embodiments, along the first direction X, the projection of the first extension section 212 is located within the projection range of the top wall 111. By arranging part of the first extension section 212 in the accommodation space formed by the top wall 111 and the first sealing portion 101, the thickness space occupied by the first extension section 212 is reduced, so that the first extension section 212 does not extend beyond the first side wall 113 and the second side wall 114, which helps to reduce the thickness of the battery assembly 100.

[0078] Referring to FIG. 11 , in some embodiments, the first extension section 212 includes a first section 212 a connected to the first body 211 . The first section 212 a is located on a side of the first sealing portion 101 close to the first sidewall 113 .

[0079] In some embodiments, the first extension section 212 includes a second section 212 b , the second section 212 b is connected to the first section 212 a , and the second section 212 b is located on a side of the first sealing portion 101 away from the top wall 111 .

[0080] In some embodiments, the first extension section 212 includes a third section 212c, which connects to the side of the second section 212b facing away from the first section 212a. The third section 212c is located on the side of the first sealing portion 101 away from the first sidewall 113, and at least a portion of the third section 212c is exposed at the outermost side of the battery assembly 100 for connection to an external power source.

[0081] In some embodiments, along the first direction X, projections of the first section 212 a , the second section 212 b , and the third section 212 c are all located within the projection range of the top wall 111 .

[0082] In some embodiments, the length of the third section 212 c is smaller than the length of the first section 212 a , which helps to reduce the space occupied by the third section 212 c .

[0083] In some embodiments, the conductive layer 21 is made of a conductive material. Optionally, the conductive layer 21 includes a metal foil. Optionally, the metal foil includes aluminum foil, copper foil, etc.

[0084] In some embodiments, the conductive layer 21 is made of a conductive material and a substrate, and the conductive material covers the surface of the substrate.

[0085] Please refer to Figures 5 and 6. In some embodiments, the conductive layer 21 includes a base layer 21a and a conductive sublayer 21b. The base layer 21a is connected to the first adhesive layer 22, and the conductive sublayer 21b is connected to the side of the base layer 21a away from the first adhesive layer 22, so as to facilitate the conductive layer 21 to adhere to the first adhesive layer 22.

[0086] In some embodiments, the conductive sublayer 21 b is electroplated on a side of the base layer 21 a facing away from the first adhesive layer 22 .

[0087] In some embodiments, the base layer 21 a includes one of polyethylene terephthalate (PET), polycarbonate (PC), and aramid.

[0088] In some embodiments, the conductive sublayer 21b includes one of aluminum, copper, and nickel.

[0089] In some embodiments, the thickness h1 of the base layer 21a satisfies 0.008 mm ≤ h1 ≤ 0.05 mm. If h1 is less than 0.008 mm, the base layer 21a is too thin to support the conductive sublayer 21b. If h1 is greater than 0.05 mm, the base layer 21a is too thick, increasing the space occupied. By limiting 0.008 mm ≤ h1 ≤ 0.05 mm, the conductive sublayer 21b can be supported while reducing the space occupied by the base layer 21a.

[0090] Alternatively, h1 (in mm) may be 0.008, 0.009, 0.01, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, 0.02, 0.021, 0.022, 0.023, 0.024, 0.025, 0.026, 0.027, 0.0 Any one of 0.28, 0.029, 0.03, 0.031, 0.032, 0.033, 0.034, 0.035, 0.036, 0.037, 0.038, 0.039, 0.04, 0.041, 0.042, 0.043, 0.044, 0.045, 0.046, 0.047, 0.048, 0.049, 0.05.

[0091] In some embodiments, the thickness h2 of the conductive sublayer 21b satisfies 0.002 mm ≤ h2 ≤ 0.02 mm. If h2 is less than 0.002 mm, the conductive sublayer 21b is too thin, resulting in poor conductivity and poor viscosity reduction of the second adhesive layer 23, hindering disassembly of the battery 10. If h2 is greater than 0.02 mm, the conductive sublayer 21b is too thick, increasing the space occupied. By limiting 0.002 mm ≤ h2 ≤ 0.02 mm, the conductive effect of the conductive sublayer 21b can be ensured while reducing the space occupied by the conductive sublayer 21b.

[0092] Optionally, h2 (in mm) can be any one of 0.002, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, and 0.02.

[0093] Referring to Figures 6 to 11 , in some embodiments, the first adhesive layer 22 includes a second body 221 and a second extension 222 connected to the second body 221. Along the thickness direction of the first adhesive layer 22, one side of the second body 221 is connected to the first body 211, and the other side is connected to the first sidewall 113. Along the thickness direction of the first adhesive layer 22, one side of the second extension 222 is connected to the first extension 212, and the other side is connected to the first sealing portion 101. Along the second direction Y, the projections of the first body 211, the second body 221, and the second adhesive layer 23 are all located within the projection of the first sidewall 113. This increases the area of ​​the first adhesive layer 22 connected to the battery 10, improves the connection strength between the first adhesive layer 22 and the battery 10, and reduces the space occupied in the second direction Y.

[0094] In some embodiments, the thickness h3 of the first adhesive layer 22 satisfies 0.01 mm ≤ h3 ≤ 0.05 mm. If h3 is less than 0.01 mm, the first adhesive layer 22 is too thin and the bonding strength is weak. If h3 is greater than 0.05 mm, the first adhesive layer 22 is too thick, increasing the space occupied. By limiting 0.01 mm ≤ h3 ≤ 0.05 mm, the bonding effect of the first adhesive layer 22 can be improved while reducing the space occupied by the first adhesive layer 22.

[0095] Alternatively, h3 (in mm) may be 0.01, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, 0.02, 0.021, 0.022, 0.023, 0.024, 0.025, 0.026, 0.027, 0.028, 0.0 Any one of 29, 0.03, 0.031, 0.032, 0.033, 0.034, 0.035, 0.036, 0.037, 0.038, 0.039, 0.04, 0.041, 0.042, 0.043, 0.044, 0.045, 0.046, 0.047, 0.048, 0.049, 0.05.

[0096] Please refer to Figures 6 to 11. In some embodiments, the adhesive 20 includes an insulating layer 24, which covers the side of the first segment 212a and the second segment 212b facing away from the second extension segment 222, thereby reducing the risk of short circuit caused by the conductive layer 21 contacting the battery compartment 201. If the conductive layer 21 contacts the battery compartment 201, during the power-on process, the contact portion of the conductive layer 21 with the battery compartment 201 will short-circuit the second adhesive layer 23, and the current cannot pass through the second adhesive layer 23, resulting in the inability to weaken or eliminate the viscosity of the second adhesive layer 23.

[0097] In some embodiments, the insulating layer 24 covers the side of the first segment 212a and the second segment 212b facing away from the second extension segment 222, and covers a portion of the side of the third segment 212c facing away from the second extension segment 222. The side of the third segment 212c facing away from the second extension segment 222 is partially exposed to the insulating layer 24, which can further reduce the risk of short circuit caused by contact between the conductive layer 21 and the battery compartment 201.

[0098] Referring to Figures 12 to 15 , in some embodiments, along the second direction Y, the projection of the insulating layer 24 overlaps with the projection of the second adhesive layer 23. That is, the end of the second adhesive layer 23 near the first sealing portion 101 overlaps with the projection of the insulating layer 24, and the insulating layer 24 covers the conductive layer 21, which is exposed at the junction of the second adhesive layer 23. Due to lamination tolerances, a gap is easily formed between the insulating layer 24 and the second adhesive layer 23. The conductive layer 21 in the gap is easily short-circuited with the battery compartment 201. By partially overlapping the insulating layer 24 and the second adhesive layer 23, the formation of the gap can be reduced, further reducing the risk of a short circuit caused by contact between the conductive layer 21 and the battery compartment 201.

[0099] 12 , in some embodiments, the insulating layer 24 covers a portion of the second adhesive layer 23 . A portion of the second adhesive layer 23 is located between the insulating layer 24 and the conductive layer 21 .

[0100] 15 , in some embodiments, the second adhesive layer 23 covers a portion of the insulating layer 24 . The portion of the insulating layer 24 is located between the second adhesive layer 23 and the conductive layer 21 .

[0101] In some embodiments, along the second direction Y, the width L1 of the overlapping portion of the insulating layer 24 and the second adhesive layer 23 satisfies 0<L1<2mm, thereby achieving insulation and reducing the thickness space occupied by the overlapping portion.

[0102] In some embodiments, the thickness h4 of the insulating layer 24 satisfies 0.005 mm ≤ h4 ≤ 0.05 mm. If h4 is less than 0.005 mm, the insulating layer 24 is too thin, affecting the insulation effect. If h4 is greater than 0.05 mm, the insulating layer 24 is too thick, increasing the space occupied. By limiting 0.005 mm ≤ h4 ≤ 0.05 mm, the conductive effect of the insulating layer 24 is ensured while reducing the space occupied by the insulating layer 24.

[0103] Alternatively, h4 (in mm) may be 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, 0.02, 0.021, 0.022, 0.023, 0.024, 0.025, 0.026, Any one of 0.027, 0.028, 0.029, 0.03, 0.031, 0.032, 0.033, 0.034, 0.035, 0.036, 0.037, 0.038, 0.039, 0.04, 0.041, 0.042, 0.043, 0.044, 0.045, 0.046, 0.047, 0.048, 0.049, or 0.05.

[0104] In some embodiments, the material of the insulating layer 24 includes polyethylene terephthalate (PET) or polyimide (PI).

[0105] Referring to Figure 6 , in some embodiments, the second adhesive layer 23 includes a third body 231. Along the second direction Y, one side of the third body 231 is connected to the first body 211, and the other side is used to connect to the battery compartment 201. Along the second direction Y, the projections of the first body 211, the second body 221, and the third body 231 are all located within the projection of the first sidewall 113. The projection of the insulating layer 24 overlaps with the projection of the third body 231.

[0106] Referring to Figure 16 , in some embodiments, the second adhesive layer 23 includes a third body 231 and a third extension 232 connected to the third body 231. Along the second direction Y, one side of the third body 231 is connected to the first body 211, and the other side is used to connect to the battery compartment 201. Along the second direction Y, the projections of the first body 211, the second body 221, and the third body 231 are all located within the projection of the first sidewall 113.

[0107] In some embodiments, the third extension section 232 includes a fourth section 232 a . Along the second direction Y, one side of the fourth section 232 a is connected to the first section 212 a , and a projection of the insulating layer 24 overlaps with a projection of the fourth section 232 a .

[0108] In some embodiments, the third extension section 232 includes a fourth section 232a, a fifth section 232b, and a sixth section 232c, which are connected in sequence. The fourth section 232a is connected to the third body 231. One side of the fourth section 232a is connected to the first section 212a. One side of the fifth section 232b is connected to the second section 212b. One side of the sixth section 232c is connected to the third section 212c. The third section 212c is at least partially exposed from the sixth section 232c.

[0109] In some embodiments, the insulating layer 24 covers the side of the fourth section 232a and the fifth section 232b away from the first extension section 212. Because a gap exists between the first sealing portion 101 and the inner wall of the battery compartment 201, the second adhesive layer 23 is susceptible to attracting impurities such as dust and debris. Covering the fourth section 232a and the fifth section 232b with the insulating layer 24 reduces the amount of impurities such as dust and debris adsorbed by the second adhesive layer 23.

[0110] In some embodiments, the insulating layer 24 covers the fourth section 232a, the fifth section 232b, and the side of the sixth section 232c away from the first extension section 212, thereby further reducing the adsorption of impurities such as dust and debris on the second adhesive layer 23.

[0111] In some embodiments, the thickness h5 of the second adhesive layer 23 satisfies 0.025 mm ≤ h5 ≤ 0.1 mm. If h5 is less than 0.025 mm, the second adhesive layer 23 is too thin, affecting the effectiveness of securing the battery 10 to the battery compartment 201. If h5 is greater than 0.1 mm, the second adhesive layer 23 is too thick, increasing the space occupied. By limiting the range of 0.025 mm ≤ h5 ≤ 0.1 mm, the fixing effect of the second adhesive layer 23 is ensured while reducing the space occupied by the second adhesive layer 23.

[0112] Alternatively, h5 (in mm) may be 0.025, 0.026, 0.027, 0.028, 0.029, 0.03, 0.031, 0.032, 0.033, 0.034, 0.035, 0.036, 0.037, 0.038, 0.039, 0.04, 0.041, 0.042, 0.043, 0.044, 0.045, 0.046, 0.047, 0.048, 0.0 Any one of 0.049, 0.05, 0.052, 0.054, 0.056, 0.058, 0.06, 0.062, 0.064, 0.066, 0.068, 0.07, 0.072, 0.074, 0.076, 0.078, 0.08, 0.082, 0.084, 0.086, 0.088, 0.09, 0.092, 0.094, 0.096, 0.098, 0.1.

[0113] Referring to Figures 7 and 11 , in some embodiments, the battery 10 includes a first protective layer 13, which connects the first sidewall 113, the first sealing portion 101, and the second sidewall 114. The tab 12 and at least a portion of the first sealing portion 101 are located within the first protective layer 13. A first adhesive layer 22 is connected to the first protective layer 13. Along the second direction Y, the projection of the insulating layer 24 on the first sidewall 113 is separated from the projection of the first protective layer 13 on the first sidewall 113. This reduces the overlap between the insulating layer 24 and the first protective layer 13, reduces the thickness space occupied, and facilitates reducing the thickness of the battery 10.

[0114] In some embodiments, the battery 10 includes a protection plate 14 . The protection plate 14 is connected to the tab 12 , and the protection plate 14 is disposed within the first protective layer 13 .

[0115] In some embodiments, the battery 10 includes an elastic member 14 a , which is disposed on the top wall 111 . The protective plate 14 is connected to the elastic member 14 a . The elastic member 14 a can buffer the protective plate 14 along the first direction X.

[0116] Referring to Figure 17 , in some embodiments, the battery 10 includes an adapter 15 located within the packaging bag 11 and connecting the electrode assembly and the tab 12. Along the second direction Y, the projection of the adapter 15 is separated from the projection of the insulating layer 24 , reducing the overlap between the insulating layer 24 and the adapter 15 and the occupied thickness space, thereby facilitating a reduction in the thickness of the battery 10.

[0117] Referring to FIG. 8 , in some embodiments, battery 10 includes a second protective layer 16 extending from first sidewall 113 through bottom wall 112 to second sidewall 114. Second protective layer 16 connects a portion of first sidewall 113, bottom wall 112, and a portion of second sidewall 114. Second protective layer 16 also connects a portion of third sidewall 115 and fourth sidewall 116.

[0118] Referring to Figures 18 to 20 , in some embodiments, the battery assembly 100 includes two adhesive members 20 , spaced apart in the third direction Z when viewed along the second direction Y. The third section 212c of each adhesive member 20 extends to the side of the first sealing portion 101 facing away from the first sidewall 113 to facilitate connection to an external power source. Each adhesive member 20 is positioned at a different location within the same battery compartment 201 to accommodate battery compartments 201 with varying structures.

[0119] Referring to FIG. 25 , in some embodiments, the battery assembly 100 includes a protective film 100 a , which is attached to a side of the second adhesive layer 23 facing away from the first adhesive layer 22 , to reduce the risk of foreign matter sticking to the second adhesive layer 23 during the manufacturing process of the battery 10 .

[0120] In some embodiments, the protective film 100a includes a tear-off portion 110 , which protrudes from the packaging bag 11 to facilitate tearing off the protective film 100a.

[0121] 21 to 24 , a second embodiment of the present application provides a battery assembly 100 , wherein a portion of the conductive layer 21 extends through the bottom wall 112 to a side of the second side wall 114 facing away from the first side wall 113 .

[0122] In some embodiments, along the thickness direction of the first adhesive layer 22, one side of the second body 221 is connected to the first sidewall 113. The second extension section 222 partially extends to the side of the second sidewall 114 facing away from the first sidewall 113. One side of the second extension section 222 connects the first sidewall 113, the bottom wall 112, and the second sidewall 114.

[0123] In some embodiments, the first body 211 connects to the side of the second body 221 facing away from the packaging bag 11, and the first extension 212 connects to the side of the second extension 222 facing away from the packaging bag 11. The first extension 212 partially extends to the side of the second sidewall 114 facing away from the first sidewall 113 to connect to an external power source. Specifically, the first section 212a connects to the first sidewall 113, the second section 212b connects to the bottom wall 112, and the third section 212c connects to the second sidewall 114.

[0124] In some embodiments, the second adhesive layer 23 includes a third body 231. Along the second direction Y, one side of the third body 231 is connected to the first body 211, and the other side is used to connect to the battery compartment 201. Along the second direction Y, the projection of the first body 211, the projection of the second body 221, and the projection of the third body 231 are all located within the projection of the first sidewall 113.

[0125] In some embodiments, the second adhesive layer 23 includes a third body 231 and a third extension 232 connected to the third body 231. The third extension 232 includes a fourth segment 232a. Along the second direction Y, one side of the fourth segment 232a is connected to the first segment 212a, and the projection of the insulating layer 24 overlaps with the projection of the fourth segment 232a.

[0126] In some embodiments, a portion of the third extension section 232 extends to the side of the second sidewall 114 facing away from the first sidewall 113. The third extension section 232 includes a fourth section 232a, a fifth section 232b, and a sixth section 232c, which are connected in sequence. The fourth section 232a is connected to the third body 231. One side of the fourth section 232a is connected to the first section 212a. One side of the fifth section 232b is connected to the second section 212b. One side of the sixth section 232c is connected to the third section 212c. The third section 212c is at least partially exposed from the sixth section 232c.

[0127] In some embodiments, the insulating layer 24 partially extends to the side of the second sidewall 114 away from the first sidewall 113 , and covers at least the first segment 212 a and the second segment 212 b . At least a portion of the side of the third segment 212 c away from the second extension 222 is exposed from the insulating layer 24 .

[0128] In some embodiments, along the first direction X, the two second sealing portions 102 protrude from the bottom wall 112, and the second section 212b is located between the two second sealing portions 102. The accommodation space formed by the bottom wall 112 and the portions of the two second sealing portions 102 protruding from the bottom wall 112 can reduce the space occupied by the first extension section 212 in the first direction X.

[0129] In some embodiments, along the first direction X, the height of the second section 212 b protruding from the bottom wall 112 is less than the height of the second sealing portion 102 protruding from the bottom wall 112 , which can further reduce the space occupied by the first extension section 212 in the first direction X.

[0130] In some embodiments, a first opening 161 is defined on a side of the second protective layer 16 connected to the first sidewall 113 , and the first section 212 a is located in the first opening 161 , thereby reducing the thickness of the space occupied by the first section 212 a .

[0131] In some embodiments, along the second direction Y, the height of the second protective layer 16 protruding from the first sidewall 113 is greater than the height of the first section 212 a protruding from the first sidewall 113 , which can further reduce the thickness space occupied by the first section 212 a .

[0132] In some embodiments, a second opening 162 is defined on a side of the second protective layer 16 connected to the second sidewall 114 , and at least a portion of the third section 212 c is located in the second opening 162 , thereby reducing the thickness of the third section 212 c .

[0133] In some embodiments, along the second direction Y, the height of the second protective layer 16 protruding from the second sidewall 114 is greater than the height of the third section 212 c protruding from the second sidewall 114 , which can further reduce the thickness space occupied by the third section 212 c .

[0134] Referring to Figures 26 to 29 , a third embodiment of the present application provides a battery assembly 100. The adhesive member 20 includes a first connecting segment 210. The first connecting segment 210 extends to the second sidewall 114 or the side of the first sealing portion 101 facing away from the first sidewall 113. The first connecting segment 210 is provided with an exposure hole 210a, through which the conductive layer 21 is exposed. The positive electrode of an external circuit is connected to the conductive layer 21 through the exposure hole 210a, and the negative electrode is connected to the battery compartment 201. Alternatively, the negative electrode of the external circuit is connected to the conductive layer 21 through the exposure hole 210a, and the positive electrode is connected to the battery compartment 201. By exposing the conductive layer 21 in the form of an exposure hole 210a, the manufacturing process is optimized, and the first adhesive layer 22, the conductive layer 21 and the third adhesive layer 23 are easily combined into the adhesive component 20. The risk of short circuit caused by electrical connection with external conductive parts can also be reduced, and the structural strength of the first connecting section 210 can be improved. If necessary, force can be applied to the first connecting section 210 to remove the battery 10 from the battery compartment 201.

[0135] In some embodiments, the first adhesive layer 22, the conductive layer 21, and the second adhesive layer 23 in the first connecting section 210 are arranged sequentially along the second direction Y. The first adhesive layer 22 is connected to the second sidewall 114 or the side of the first sealing portion 101 facing away from the first sidewall 113. Along the second direction Y, the exposure hole 210a penetrates the second adhesive layer 23.

[0136] In some embodiments, in the first direction X and / or the third direction Z, the ends of the first adhesive layer 22 , the conductive layer 21 , and the second adhesive layer 23 in the first connecting section 210 are flush with each other.

[0137] In some embodiments, in the first direction X and / or the third direction Z, a projection of the conductive layer 21 located in the first connecting segment 210 along the second direction Y is located within a projection of the second adhesive layer 23 along the second direction Y.

[0138] In some embodiments, the insulating member 24 is connected to the second adhesive layer 23 , and the first adhesive layer 22 , the conductive layer 21 , the second adhesive layer 23 , and the insulating member 24 located in the first connecting section 210 are arranged sequentially along the second direction Y. Along the second direction Y, the exposure hole 210 a penetrates the second adhesive layer 23 and the insulating member 24 . The insulating member 24 can reduce the risk of a short circuit caused by contact between the conductive layer 21 and the battery compartment 201 .

[0139] In some embodiments, in the first direction X and / or the third direction Z, the ends of the first adhesive layer 22, the conductive layer 21, the second adhesive layer 23 and the insulating layer 24 located in the first connecting section 210 are arranged flush, reducing the risk of a short circuit caused by contact between the conductive layer 21 and the battery compartment 201.

[0140] In some embodiments, in the first direction X and / or the third direction Z, the projection of the conductive layer 21 located in the first connecting segment 210 along the second direction Y is located within the projection of the second adhesive layer 23 and the insulating layer 24 along the second direction Y, thereby reducing the risk of a short circuit caused by contact between the conductive layer 21 and the battery compartment 201.

[0141] In some embodiments, the insulating member 24 extends to the ends of the first adhesive layer 22 , the conductive layer 21 , and the second adhesive layer 23 , and the insulating member 24 covers the conductive layer 21 , which helps reduce the risk of a short circuit caused by contact between the conductive layer 21 and the battery compartment 201 .

[0142] Referring to Figures 30 and 31 , in some embodiments, the exposure hole 210a can be polygonal, circular, elliptical, or the like. Alternatively, the exposure hole 210a can be rectangular. Alternatively, the exposure hole 210a can be circular. It is understood that the shape of the exposure hole 210a is not limited to the above, as long as it facilitates connection to an external circuit.

[0143] Taking the exposure hole 210 a as a rectangle as an example, along the third direction Z, the first width d1 of the first connecting section 210 is d1≧2 mm, and the second width d2 of the exposure hole 210 a is d1-d2≧1 mm.

[0144] In some embodiments, along the first direction X, a third width d3 of the exposed hole 210 a is exposed, and d3≧2 mm.

[0145] In some embodiments, along the first direction X, a minimum distance d4 between the exposed hole 210 a and the edge of the first connecting segment 210 is ≥ 0.5 mm.

[0146] Referring to Figures 26 to 29 , in some embodiments, the adhesive member 20 includes a second connecting segment 220. Along the second direction Y, the battery 10 is located between the second connecting segment 220 and the first connecting segment 210. Along the second direction Y, the second adhesive layer 23, the conductive layer 21, and the first adhesive layer 22 in the second connecting segment 220 are sequentially arranged. The first adhesive layer 22 in the second connecting segment 220 is connected to the first sidewall 113. The second adhesive layer 23 in the second connecting segment 220 is connected to the battery compartment 201.

[0147] 32 , in some embodiments, the width of the first connecting segment 210 is substantially the same as the width of the second connecting segment 220. For example, the difference between the width of the first connecting segment 210 and the width of the second connecting segment 220 is less than 0.1 mm.

[0148] 26 to 29 , in some embodiments, the adhesive member 20 includes a third connecting segment 230 that connects the first connecting segment 210 and the second connecting segment 220. Along a first direction X, the second adhesive layer 23, the conductive layer 21, and the first adhesive layer 22 are sequentially arranged in the third connecting segment 230.

[0149] In some embodiments, along the first direction X, the insulating member 24 is connected to the second adhesive layer 23 located in the third connecting section 230 , and the insulating member 24 is located between the second adhesive layer 23 and the battery compartment 201 .

[0150] In some embodiments, the third connecting section 230 is connected to the bottom wall 112 and is located between the bottom wall 112 and the battery compartment 201 .

[0151] In some embodiments, the third connecting segment 230 is connected to the third side wall 115 and is located between the third side wall 115 and the battery compartment 201 .

[0152] In some embodiments, the third connecting segment 230 is connected to the fourth side wall 116 and is located between the fourth side wall 116 and the battery compartment 201 .

[0153] In some embodiments, the third connecting segment 230 is located between the protection plate 14 and the battery compartment 201 .

[0154] Referring to FIG. 27 , in some embodiments, the first body 211 connects the second body 221 and the third body 231 to form a second connecting segment 220 .

[0155] In some embodiments, the first extending segment 212 connects the second extending segment 222 and the third extending segment 232 to form a first connecting segment 210 and a third connecting segment 230 .

[0156] Please refer to Figure 33. In some embodiments, in the third direction Z and / or the first direction X, the projection of the conductive layer 21 along the second direction Y is located within the projection of the second adhesive layer 23 along the second direction Y, thereby reducing the risk of the conductive layer 21 contacting the battery compartment 201 and causing a short circuit.

[0157] In some embodiments, along the third direction Z, the second adhesive layer 23 includes a first edge 23a and a second edge 23b. Along the second direction Y, a projection of the conductive layer 21 is located between the projection of the first edge 23a and the projection of the second edge 23b.

[0158] In some embodiments, along the third direction Z, the minimum distance w1 between the first edge 23a and the edge of the conductive layer 21 is 0≤w1≤3mm, which helps reduce the risk of a short circuit caused by contact between the conductive layer 21 and the battery compartment 201. Optionally, w1 can be any one of 0mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, and 3mm, or any two of these.

[0159] In some embodiments, along the third direction Z, the minimum distance w2 between the second edge 23b and the edge of the conductive layer 21 is 0≤w2≤3mm, which helps reduce the risk of a short circuit caused by contact between the conductive layer 21 and the battery compartment 201. Optionally, w2 can be any one of 0mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, and 3mm, or any combination thereof.

[0160] Referring to Figure 26 , in some embodiments, the first sealing portion 101, the protective plate 14, and the first connecting segment 210 are arranged along the second direction Y. The protective plate 14 is located on the side of the first sealing portion 101 away from the first sidewall 113, and the first connecting segment 210 is connected to the side of the protective plate 14 facing away from the first sealing portion 101. When viewed along the first direction X, the first connecting segment 210 does not extend beyond the packaging bag 11 along the second direction Y, which helps reduce the space occupied by the adhesive 20 in the thickness direction of the battery 10 and improves space utilization.

[0161] Referring to Figure 34 , in some embodiments, the protective plate 14 is located on a side of the first sealing portion 101 away from the first sidewall 113. The first connecting segment 210 connects to the side of the protective plate 14 facing away from the first sealing portion 101. The protective plate 14 has a notch 141, and a portion of the adhesive 20 is disposed within the notch 141. When viewed along the second direction Y, the adhesive 20 does not extend beyond the protective plate 14 along the first direction X. This helps reduce the space occupied by the adhesive 20 along the first direction X and improves space utilization. Optionally, a portion of the third connecting segment 230 is disposed within the notch 141.

[0162] In some embodiments, the thickness of the adhesive member 20 is smaller than the depth of the notch portion 141 along the first direction X, thereby reducing the space occupied by the adhesive member 20 along the first direction X.

[0163] Please refer to Figure 27. In some embodiments, when the width of the first connecting section 210 is substantially the same as the width of the second connecting section 220, the first connecting section 210 is connected to the second side wall 114, the second connecting section 220 is connected to the first side wall 113, the adhesive member 20 and the battery 10 form a receiving space 103, the protective plate 14 is disposed in the receiving space 103, and the adhesive member 20 covers the protective plate 14 and the first sealing portion 101 to provide insulation protection for the protective plate 14 and the first sealing portion 101.

[0164] In some embodiments, along the first direction X, the protection plate 14 is located between the top wall 111 and the third connecting segment 230 , and along the second direction Y, the protection plate 14 is located between the second connecting segment 220 and the first connecting segment 210 .

[0165] Referring to FIG. 28 , in some embodiments, the third connecting segment 230 is connected to the bottom wall 112 , and the first connecting segment 210 is connected to the third connecting segment 230 and extends to the second side wall 114 .

[0166] In some embodiments, the third connecting segment 230 is connected to the third sidewall 115 or the fourth sidewall 116 , and the first connecting segment 210 is connected to the third connecting segment 230 and extends to the second sidewall 114 .

[0167] In some embodiments, the battery assembly 100 includes insulating glue, which is applied to the end surface of the first connecting segment 210 facing away from the third connecting segment 230. The insulating glue at least covers the conductive layer 21 exposed on the end surface, which helps to reduce the risk of the conductive layer 21 contacting the battery compartment 201 or other components and causing a short circuit.

[0168] Referring to Figure 35 , this application also provides an electrical device 300 utilizing the aforementioned battery assembly 100. The electrical device 300 includes a battery compartment 201, a second adhesive layer 23 connected to the battery compartment 201, and the second adhesive layer 23 is configured to weaken or eliminate its viscosity when power is applied between the conductive layer 21 and the battery compartment 201. In one embodiment, the electrical device 300 of this application may be, but is not limited to, various types of electronic devices.

[0169] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments fall within the scope disclosed in the present application.

Claims

1. A battery assembly, comprising a battery and an adhesive, wherein the adhesive is configured to adhere the battery to an external battery compartment, the battery comprising a packaging bag and a tab, the packaging bag comprising a top wall, a bottom wall, a first side wall, and a second side wall, the top wall and the bottom wall being arranged along a first direction, the first side wall and the second side wall being arranged along a second direction, the first side wall connecting the top wall and the bottom wall, the second side wall connecting the top wall and the bottom wall, the packaging bag comprising a first sealing portion, the first sealing portion connecting the top wall, the tab extending from the first sealing portion, the first direction being perpendicular to the second direction, the second direction being the thickness direction of the battery, characterized in that: The adhesive member comprises: a first adhesive layer, connecting the first side wall; a second adhesive layer configured to connect to the external battery compartment; a conductive layer, wherein one side of the conductive layer is connected to the first adhesive layer, and the other side of the conductive layer is at least partially connected to the second adhesive layer; The conductive layer includes a first body and a first extension segment connected to the first body, the first body is connected to the first sidewall, and the first extension segment extends to the second sidewall or a side of the first sealing portion facing away from the first sidewall; The second adhesive layer is configured to weaken or disappear in viscosity when electricity is applied between the conductive layer and the external battery compartment.

2. The battery assembly according to claim 1, wherein Along the second direction, the projection of the first body is located within the projection range of the first side wall, the first extension section includes a first section, a second section and a third section connected in sequence, the first section is connected to the first body, the first section is located on the side of the first sealing portion close to the first side wall, the second section is located on the side of the first sealing portion away from the top wall, the third section is located on the side of the first sealing portion away from the first side wall, and at least part of the third section is exposed to the battery. Along the first direction, the projections of the first section, the second section and the third section are all located within the projection range of the top wall.

3. The battery assembly according to claim 2, wherein: The first adhesive layer includes a second body and a second extension section connected to the second body, one side of the second body is connected to the first body, the other side of the second body is connected to the first side wall, one side of the second extension section is connected to the first extension section, and the other side of the second extension section is connected to the first sealing portion. Along the second direction, the projection of the first body, the projection of the second body, and the projection of the second adhesive layer are all located within the projection range of the first side wall.

4. The battery assembly according to claim 3, wherein: The adhesive also includes an insulating layer, which covers the first segment and the side of the second segment facing away from the second extension segment. The side of the third segment facing away from the second extension segment is at least partially exposed to the insulating layer. Along the second direction, the projection of the insulating layer overlaps with the projection of the second adhesive layer.

5. The battery assembly according to claim 4, wherein: Along the second direction, a width L1 of an overlapping portion of the insulating layer and the second adhesive layer satisfies 0<L1<2 mm.

6. The battery assembly according to claim 4, wherein: The second adhesive layer includes a third body, one side of the third body is connected to the first body, and the other side of the third body is used to connect to the battery compartment. Along the second direction, the projection of the first body, the projection of the second body and the projection of the third body are all located within the projection range of the first side wall, and the projection of the insulating layer overlaps with the projection of the third body.

7. The battery assembly according to claim 4, wherein: The second adhesive layer includes a third body and a third extension segment, one side of the third body is connected to the first body, and the other side of the third body is used to connect to the battery compartment. Along the second direction, the projection of the first body, the projection of the second body and the projection of the third body are all located within the projection range of the first side wall. The third extension segment includes a fourth segment, a fifth segment and a sixth segment connected in sequence. The fourth segment is connected to the third body, one side of the fourth segment is connected to the first segment, one side of the fifth segment is connected to the second segment, and one side of the sixth segment is connected to the third segment. The third segment is at least partially exposed to the sixth segment, and the insulating layer covers the side of the fourth segment, the fifth segment and the sixth segment away from the first extension segment.

8. The battery assembly according to claim 4, wherein: The battery also includes a first protective layer, which connects the first side wall, the first sealing portion and the second side wall. The electrode tab and at least part of the first sealing portion are located in the first protective layer. The first adhesive layer is connected to the first protective layer. Along the second direction, the projection of the insulating layer on the first side wall is separated from the projection of the first protective layer on the first side wall.

9. The battery assembly according to claim 4, wherein: The battery includes an electrode assembly and a converter disposed in the packaging bag. The converter connects the electrode assembly and the tab. Along the second direction, a projection of the insulating layer is separated from a projection of the converter.

10. The battery assembly according to claim 1, wherein: The conductive layer includes a base layer and a conductive sublayer. The base layer is connected to the first adhesive layer, and the conductive sublayer is connected to a side of the base layer facing away from the first adhesive layer.

11. The battery assembly according to claim 1, wherein: The battery assembly includes two adhesive members. When viewed along the second direction, the two adhesive members are spaced apart in the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

12. The battery assembly according to claim 1, wherein: The adhesive component includes a first connecting section extending to the second side wall or the side of the first sealing portion facing away from the first side wall. The first connecting section is provided with an exposure hole, and the conductive layer is exposed in the exposure hole.

13. The battery assembly according to claim 12, wherein: The adhesive member includes an insulating layer. Along the second direction, the first adhesive layer, the conductive layer, the second adhesive layer and the insulating layer located in the first connecting section are stacked in sequence. The first adhesive layer located in the first connecting section is connected to the second side wall or the side of the first sealing portion facing away from the first side wall. The exposure hole penetrates the second adhesive layer and the insulating layer along the second direction.

14. The battery assembly according to claim 13, wherein: In the first direction, the projection of the conductive layer located in the first connecting section along the second direction is located within the projection of the second adhesive layer and the insulating layer along the second direction, or the ends of the first adhesive layer, the conductive layer, the second adhesive layer and the insulating layer located in the first connecting section are arranged flush.

15. The battery assembly according to claim 13, wherein: The adhesive component includes a second connecting section. Along the second direction, the battery is located between the second connecting section and the first connecting section. Along the second direction, the second adhesive layer, the conductive layer and the first adhesive layer located in the second connecting section are stacked in sequence, and the first adhesive layer located in the second connecting section is connected to the first side wall.

16. The battery assembly according to claim 12, wherein: In the first direction and / or the third direction, a projection of the conductive layer along the second direction is located within a projection of the second adhesive layer along the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

17. The battery assembly according to claim 15, wherein: The battery further includes a protective plate, which is disposed on the top wall and connected to the tab. The adhesive covers the protective plate and the first sealing portion. The first connecting section is connected to the second side wall, and the second connecting section is connected to the first side wall.

18. The battery assembly according to claim 12, wherein: The battery also includes a protective plate, which is arranged on the top wall and connected to the electrode ear. The first sealing portion extends along the first direction. Along the second direction, the protective plate is located on the side of the first sealing portion away from the first side wall, and the first connecting section extends to the side of the protective plate away from the first sealing portion.

19. An electrical device, characterized in that: Comprising a battery assembly as described in any one of claims 1 to 18, the electrical equipment includes a battery compartment, the second adhesive layer is connected to the battery compartment, and the second adhesive layer is configured to weaken or disappear its viscosity when power is applied between the conductive layer and the battery compartment.

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