Battery structure and power consuming device

Abstract

The present disclosure relates to a battery structure and an electric device, the battery structure comprising a battery cell, a tab and a battery protection plate, the tab being electrically connected with the battery cell, the battery protection plate being electrically connected with the tab, and the battery protection plate being arranged outside the circumferential edge of the battery cell; in the thickness direction of the battery cell, the projection of the battery cell is a first projection, the projection of the battery protection plate is a second projection, and the first projection and the second projection are arranged staggeredly. In the above technical solution, the battery cell and the battery protection plate do not overlap in the thickness direction of the battery cell, thereby effectively avoiding the increase of the thickness of the battery structure caused by the arrangement of the battery protection plate, and facilitating the ultra-thin design of the battery structure.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, specifically to a battery structure and an electrical device. Background Technology

[0002] With the rapid development of portable electronic devices (such as smartphones, ultra-thin laptops, and wearable devices), the requirements for battery thickness are becoming increasingly stringent, and ultra-thin design has become one of the main technological directions. The ultra-thin design of batteries directly determines the thickness, weight, and design flexibility of electronic devices.

[0003] In related technologies, the battery management system (BMS) plays a crucial role in ensuring battery safety by managing the charging and discharging of the battery. However, the arrangement of the battery management system in related technologies often increases the thickness of the battery, which is not conducive to the design of ultra-thin batteries. Utility Model Content

[0004] To overcome the problems existing in related technologies, this disclosure provides a battery structure and an electrical device.

[0005] According to a first aspect of this disclosure, a battery structure is provided, the battery structure including a cell, a tab, and a battery protection board, wherein the tab is electrically connected to the cell, the battery protection board is electrically connected to the tab, and the battery protection board is arranged on the outer side of the circumferential edge of the cell; In the thickness direction of the battery cell, the projection of the battery cell is a first projection, and the projection of the battery protection board is a second projection. The first projection and the second projection are staggered.

[0006] When the battery structure is discharging, the cells discharge outward through the tabs electrically connected to them, and the battery protection board is electrically connected to the tabs, providing over-discharge protection. When the battery structure is charging, external current charges the cells through the battery protection board and the tabs, and the battery protection board provides overcharge protection.

[0007] The battery protection board is arranged on the outer side of the circumferential edge of the cell, and the projection of the cell and the projection of the battery protection board are staggered in the thickness direction of the cell. This means that the cell and the battery protection board do not overlap in the thickness direction of the cell, which can effectively avoid the increase in battery structure thickness due to the arrangement of the battery protection board, and is conducive to the design of ultra-thin battery structure.

[0008] In addition, from the perspective of heat dissipation, the battery cell generates heat during charging and discharging, and the battery protection board also generates heat during operation. By staggering the arrangement of the battery protection board and the battery cell, the superposition of heat sources can be avoided as much as possible to prevent local overheating and improve heat dissipation efficiency.

[0009] In some possible embodiments, the battery cell includes a battery cell body and a top sealing boss; The top sealing boss is protrudingly connected to one side of the cell body along the first direction, and the electrode tab is connected to the top sealing boss and electrically connected to the cell body. The battery protection board and the top sealing boss are offset from each other in the first direction.

[0010] The top sealing boss, as part of the encapsulation structure, is used to fix and seal the tabs extending from the battery cell. This top sealing boss protrudes and connects to one side of the battery cell body along the first direction, and the battery protection board is offset from the top sealing boss in the first direction. This effectively prevents the battery protection board and the top sealing boss from overlapping in the thickness direction of the battery cell, facilitating the design of an ultra-thin battery structure.

[0011] In some possible embodiments, the tab is protrudingly connected to the top sealing boss on the side away from the cell body along the first direction.

[0012] In this design, by extending the tabs protruding along the first direction, it facilitates electrical connection with the battery protection board that is staggered from the top sealing protrusion. Furthermore, the tabs do not require bending, which effectively avoids increasing the size in the thickness direction of the battery cell and is beneficial for the design of ultra-thin battery structures.

[0013] In some possible embodiments, the top sealing boss and the cell body define a recess; the battery structure also includes a filler that at least partially fills the recess and connects the cell body and the top sealing boss.

[0014] The top sealing boss and the cell body define a groove. If this groove is not filled, the top sealing boss is prone to displacement or wobbling relative to the cell body when the battery structure is subjected to vibration, impact, or compression. By filling the groove with a filler and connecting the cell body and the top sealing boss, the "misalignment" problem between the top sealing boss and the cell body is reduced. Even when the battery structure is subjected to vibration or impact, the presence of the filler can minimize displacement or wobbling of the top sealing boss relative to the cell body, thus improving the strength of the structure.

[0015] In some possible embodiments, the battery protection plate and the top sealing boss are spaced apart by a first gap in the first direction; The filler includes a first filling part and a second filling part that are connected to each other. The first filling part fills the groove and connects the cell body and the top sealing boss. The second filling part fills the first gap.

[0016] The first filling portion fills the groove defined by the top sealing boss and the cell body, effectively protecting the top sealing boss and reducing the "loose" problem between the top sealing boss and the cell body. Secondly, the second filling portion fills the first gap between the battery protection board and the top sealing boss in the first direction. This second filling portion effectively protects the battery protection board. When the battery protection board is subjected to impact or vibration, the stress can be transmitted and dispersed sequentially through the second filling portion, the first filling portion, and the cell body, avoiding stress concentration.

[0017] In some possible embodiments, the cell body has a first thickness in its thickness direction; The filler and the top sealing boss have the second thickness and the third thickness in the thickness direction of the cell body, respectively; Wherein, the sum of the second thickness and the third thickness is not greater than the first thickness.

[0018] When filling the groove, it is necessary to consider that the thickness of the filler and the top sealing boss after filling should not be greater than the thickness of the cell body, so as to avoid the battery structure being too thick due to the filling of the filler, which would be detrimental to the design of a thinner battery structure.

[0019] In some possible embodiments, the battery structure further includes a covering layer that at least partially covers the battery protection board and is connected to the battery cell.

[0020] By incorporating this coating layer, the battery protection board can be effectively protected, thus improving safety performance. For example, the coating layer can effectively isolate external contaminants such as moisture and dust, preventing short circuits or circuit corrosion and providing a physical barrier. Furthermore, the coating layer can be made of an insulating material to form effective electrical isolation from the outside environment, further enhancing safety performance. For instance, the coating layer can be a rubber film, but this disclosure does not limit the specific material of the coating layer.

[0021] In some possible embodiments, the dimension of the battery cell in its thickness direction is not less than the dimension of the battery protection plate in the thickness direction of the battery cell.

[0022] The above design ensures that the thickness of the battery protection board does not exceed the thickness of the battery cell, which is beneficial for the overall thinner and lighter design of the battery structure.

[0023] In some possible embodiments, the battery cell includes a battery cell body and a battery cell flange; The cell fold extends along the side of the cell body in the second direction, and the extension direction of the cell fold intersects with the thickness direction of the cell body.

[0024] By aligning the extension direction of the cell fold with the thickness direction of the cell body, the height of the cell fold in the thickness direction of the cell body can be effectively reduced, thus preventing the cell fold from affecting the thickness of the battery structure. For example, the cell fold can be perpendicular to the thickness direction of the cell body, effectively preventing the height of the cell fold from exceeding the thickness of the cell body and affecting the design of a thinner and lighter battery structure.

[0025] In some possible embodiments, the battery structure further includes a cell fixing layer and a cell disassembly layer; the outer surface of the cell includes a first region and a second region arranged in a staggered manner, the cell fixing layer is disposed in the first region for connection with external components, and the cell disassembly layer is disposed in the second region for disassembling the cell's packaging.

[0026] By placing the cell fixing layer and the cell disassembly layer in different areas of the cell, i.e., without overlap, a thinner battery structure can be achieved. For example, two cell disassembly layers can be provided, each wrapping around one of the two side edges of the cell in a second direction. At least two cell fixing layers can be provided and located between the two cell disassembly layers. Both the cell fixing layer and the cell disassembly layer can be constructed as adhesive layers.

[0027] In some possible embodiments, the second region is configured as two side regions on the outer surface of the cell in a second direction, with the first region located between the two side regions and spaced apart from them; The side region has a side edge, and the cell disassembly layer is configured as two layers and is respectively disposed in the two corresponding side regions, and the cell disassembly layer covers the side edge.

[0028] By placing the cell disassembly layer on the side area and covering the side edges, the side edges can be effectively protected, improving their reliability and reducing the risk of encapsulation failure due to damage to the side edges. Secondly, the cell disassembly layer can be placed close to the side edges on both sides along the cell thickness direction, without needing to cover the entire side, thus reserving ample space for the cell fixing layer.

[0029] According to a second aspect of this disclosure, an electrical device is also provided, the electrical device including the battery structure described above.

[0030] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: When the battery structure is discharging, the battery cell discharges to the outside through the tabs electrically connected to it, and the battery protection board is electrically connected to the tabs, which can provide over-discharge protection. When the battery structure is charging, the external current charges the battery cell through the battery protection board and the tabs, and the battery protection board can provide overcharge protection.

[0031] The battery protection board is arranged on the outer side of the circumferential edge of the cell, and the projection of the cell and the projection of the battery protection board are staggered in the thickness direction of the cell. This means that the cell and the battery protection board do not overlap in the thickness direction of the cell, which can effectively avoid the increase in battery structure thickness due to the arrangement of the battery protection board, and is conducive to the design of ultra-thin battery structure.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0034] Figure 1 This is a schematic diagram of a possible embodiment of the battery structure disclosed herein.

[0035] Figure 2 This is a schematic diagram of a possible embodiment of the battery structure disclosed herein, wherein... Figure 2 perspective and Figure 1 The difference.

[0036] Figure 3 This is a partial structural diagram of a battery structure according to a possible embodiment of the present disclosure.

[0037] Figure 4 This is a schematic diagram of the battery cell, tabs, and electrical connectors of a possible embodiment of the battery structure disclosed herein.

[0038] Figure 5 This is a side view of a battery structure according to one possible embodiment of the present disclosure.

[0039] Figure 6 yes Figure 5 A magnified view of a section at point H.

[0040] Explanation of reference numerals in the attached figures 1. Battery cell; 11. Battery cell body; 12. Top sealing boss; 120. Groove; 13. Battery cell fold; 2. Electrode; 21. Positive electrode; 22. Negative electrode; 3. Battery protection board; 30. First gap; 4. Filler; 41. First filling part; 42. Second filling part; 5. Covering layer; 6. Cell fixing layer; 7. Cell disassembly layer; 8. Flexible circuit board; 9. Electrical connector; 91. First U-shaped arm; 92. Second U-shaped arm; A. First direction; B. Second direction. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0042] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner and outer contours of a specific structure; directional terms such as "first direction" and "second direction" refer to two intersecting directions, as detailed in the following references. Figure 1 As shown; wherein, the first direction can be the direction of the long side of the battery, and the second direction can be the direction of the short side of the battery, or the first direction can be the direction of the short side of the battery, and the second direction can be the direction of the long side of the battery, and this disclosure does not limit this. The terms used, such as "first" and "second", are only for distinguishing one element from another and do not have any order or importance.

[0043] Reference Figures 1 to 6 As shown, this disclosure provides a battery structure, which includes a battery cell 1, a tab 2, and a battery protection plate 3. The tab 2 is electrically connected to the battery cell 1, and the battery protection plate 3 is electrically connected to the tab 2. The battery protection plate 3 is arranged on the outer side of the circumferential edge of the battery cell 1. In the thickness direction of the battery cell 1, the projection of the battery cell 1 is a first projection, and the projection of the battery protection plate 3 is a second projection. The first projection and the second projection are staggered.

[0044] In the above technical solution, when the battery structure is discharging, the cell 1 discharges to the outside through the electrode 2 electrically connected to it, and the battery protection board 3 is electrically connected to the electrode 2, which can provide over-discharge protection. When the battery structure is charging, the external current charges the cell 1 through the battery protection board 3 and the electrode 2, and the battery protection board 3 can provide overcharge protection.

[0045] The battery protection plate 3 is arranged on the outer side of the circumferential edge of the cell 1, and the projection of the cell 1 and the projection of the battery protection plate 3 are staggered in the thickness direction of the cell 1. This means that the cell 1 and the battery protection plate 3 do not overlap in the thickness direction of the cell 1, which can effectively avoid the increase in battery structure thickness caused by the arrangement of the battery protection plate 3, and is conducive to the design of ultra-thin battery structure.

[0046] In addition, from the perspective of heat dissipation, the battery cell 1 will generate heat during charging and discharging, and the battery protection board 3 will also generate heat during operation. By staggering the arrangement of the battery protection board 3 and the battery cell 1, the superposition of heat sources can be avoided as much as possible to prevent local overheating and improve heat dissipation efficiency.

[0047] The aforementioned tab 2 may include a positive tab 21 and a negative tab 22, which are electrically connected to the battery cell 1.

[0048] Optionally, the above-described battery structure can be a pouch battery. For example, the pouch battery can use an aluminum-plastic composite film constructed of a flexible material as the encapsulation shell of the cell 1. The interior of the cell 1 can include a positive electrode sheet (not shown), a negative electrode sheet (not shown), and a separator (not shown) wound or stacked together and immersed in an electrolyte (not shown). The positive electrode tab 21 is electrically connected to the positive electrode sheet, and the negative electrode tab 22 is electrically connected to the negative electrode sheet. However, this disclosure does not limit the specific type of battery structure. In other embodiments, the battery structure can also be a hard-shell battery.

[0049] In addition, regarding the shape of the cell 1, in order to facilitate the design of ultra-thin battery structure, the cell 1 can be constructed as a flat shape. For example, the cell 1 can be constructed as a flat cell with a rectangular projection in the thickness direction. However, this disclosure does not limit the specific shape of the cell 1.

[0050] In one implementation, reference is made to Figure 1 and Figure 3 As shown, the battery cell 1 includes a battery cell body 11 and a top sealing boss 12; the top sealing boss 12 is protrudingly connected to one side of the battery cell body 11 along the first direction A, and the electrode tab 2 is connected to the top sealing boss 12 and electrically connected to the battery cell body 11; the battery protection board 3 is offset from the top sealing boss 12 in the first direction A.

[0051] In this embodiment, firstly, the top sealing boss 12, as part of the encapsulation structure, is used to fix and seal the tab 2 extending from the cell 1. The top sealing boss 12 protrudes and connects to one side of the cell body 11 along the first direction A, and the battery protection plate 3 is offset from the top sealing boss 12 in the first direction A. This effectively prevents the battery protection plate 3 and the top sealing boss 12 from overlapping in the thickness direction of the cell 1, facilitating the design of an ultra-thin battery structure. The cell body 11 can be constructed as a flat cuboid cell, and the aforementioned first direction A can be the length direction of the cuboid cell, or it can be the width direction of the cuboid cell; this disclosure does not limit this.

[0052] In another embodiment, refer to Figure 4 As shown, the tab 2 protrudes along the first direction A and is connected to the top sealing boss 12 on the side away from the cell body 11. By making the tab 2 protrude along the first direction A, it is convenient to make electrical connection with the battery protection plate 3, which is staggered from the top sealing boss 12. On the other hand, the tab 2 does not need to be bent, which can effectively avoid increasing the size in the thickness direction of the cell 1 and facilitate the design of ultra-thin battery structure.

[0053] Regarding the connection between the battery protection board 3 and the tab 2, an electrical connection can be made using an electrical connector 9. For example, the electrical connector 9 includes a first welding area and a second welding area. The first welding area is welded to the battery protection board 3, and the second welding area is welded to the tab 2. However, this disclosure does not limit the connection method between the electrical connector 9 and the battery protection board 3 and the tab 2. For example, an electrical connection can also be made using adhesive bonding or fasteners.

[0054] Secondly, regarding the specific shape of the electrical connection piece 9, it can be constructed as a U-shaped connection piece. The U-shaped connection piece covers the tab 2 on the side away from the cell 1 in the first direction A, and includes a first U-shaped arm 91 and a second U-shaped arm 92 that are connected to each other. The first U-shaped arm 91 can be electrically connected to the tab 2, and the second U-shaped arm 92 can be electrically connected to the battery protection board 3.

[0055] In addition, the electrical connector 9 can be constructed as a nickel sheet, which is easy to weld and has excellent electrical conductivity, but this disclosure does not limit the specific material of the electrical connector 9.

[0056] Optionally, refer to Figure 3 and Figure 4 As shown, the top sealing boss 12 and the cell body 11 define a groove 120; the battery structure also includes a filler 4, which at least partially fills the groove 120 and connects the cell body 11 and the top sealing boss 12.

[0057] In this embodiment, a groove 120 is defined between the top sealing boss 12 and the cell body 11. If this groove 120 is not filled, the top sealing boss 12 is prone to relative displacement or shaking relative to the cell body 11 when the battery structure is subjected to vibration, impact, or compression. By filling the groove 120 with a filler 4 and connecting the cell body 11 and the top sealing boss 12, the "misalignment" problem between the top sealing boss 12 and the cell body 11 is reduced. Even when the battery structure is subjected to vibration or impact, the presence of the filler 4 can minimize the displacement or shaking of the top sealing boss 12 relative to the cell body 11, thereby improving the strength of the structure.

[0058] Regarding the material of the filler 4, it can be constructed as filler foam, which can effectively absorb energy and cushion the impact, effectively protecting the top sealing boss 12 of the battery structure and the tabs 2 on the top sealing boss 12, thereby improving the reliability of the battery structure under vibration and impact conditions. Secondly, the soft and compressible properties of the filler foam can compensate for manufacturing tolerances of components, eliminate assembly stress, and improve production yield. In addition, the filler foam is lightweight, which will not lead to excessive weight of the battery structure, thus facilitating lightweight design. However, this disclosure does not limit the specific material of the filler 4.

[0059] In other embodiments, refer to Figure 5 and Figure 6 As shown, the battery protection plate 3 and the top sealing boss 12 are separated by a first gap 30 in the first direction A; the filler 4 includes a first filling part 41 and a second filling part 42 connected to each other. The first filling part 41 fills the groove 120 and connects the top sealing boss 12 and the cell body 11, and the second filling part 42 fills the first gap 30.

[0060] In this embodiment, firstly, the first filling portion 41 fills the groove 120 defined by the top sealing boss 12 and the cell body 11, effectively protecting the top sealing boss 12 and reducing the "void" problem between the top sealing boss 12 and the cell body 11. Secondly, the second filling portion 42 fills the first gap 30 between the battery protection plate 3 and the top sealing boss 12 in the first direction A. The second filling portion 42 can effectively protect the battery protection plate 3. When the battery protection plate 3 is subjected to impact or vibration, the stress can be transmitted and dispersed sequentially through the path of the second filling portion 42, the first filling portion 41, and the cell body 11, avoiding stress concentration.

[0061] Optionally, the cell body 11 has a first thickness in its thickness direction; the filler 4 and the top sealing boss 12 have second and third thicknesses in the thickness direction of the cell body 11, respectively; wherein the sum of the second thickness and the third thickness is not greater than the first thickness.

[0062] That is, in this embodiment, when filling the groove 120, it is necessary to consider that the thickness of the filled material 4 and the top sealing boss 12 after filling should not be greater than the thickness of the cell body 11, so as to avoid the battery structure being too thick due to the filling of the filled material 4, which would be detrimental to the design of a thinner battery structure. For example, the sum of the second thickness and the third thickness can be less than the first thickness, or the sum of the second thickness and the third thickness can be equal to the first thickness. This disclosure does not limit this.

[0063] In another embodiment, refer to Figure 1 , Figure 2 , Figure 5 as well as Figure 6 As shown, the battery structure also includes a covering layer 5, which covers at least a portion of the battery protection board 3 and is connected to the battery cell 1.

[0064] In this embodiment, by providing the covering layer 5, the battery protection board 3 can be effectively protected, thus improving safety performance. For example, the covering layer 5 can effectively isolate external contaminants such as moisture and dust, preventing short circuits or circuit corrosion and providing a physical isolation barrier. Furthermore, the covering layer 5 can be made of an insulating material to form effective electrical isolation from the outside world, improving safety performance. For example, the covering layer 5 can be a rubber film, but this disclosure does not limit the specific material of the covering layer 5.

[0065] Reference Figure 6 As shown, the aforementioned covering layer 5, in addition to covering the battery protection board 3, can also cover the top sealing boss 12, the tab 2, the electrical connection piece 9, and the filler 4, effectively protecting and integrating the various components on the top of the cell body 11. This improves structural strength and safety while ensuring that the thickness of the multiple components on the top of the cell body 11 does not exceed the thickness of the cell body 11, which is beneficial for the design of a thinner and lighter battery structure.

[0066] Optionally, the dimension of the battery cell 1 in its thickness direction is not less than the dimension of the battery protection board 3 in the thickness direction of the battery cell 1. Ensuring that the thickness of the battery protection board 3 does not exceed the thickness of the battery cell 1 facilitates a thinner and lighter overall battery structure design. For example, the dimension of the battery cell 1 in its thickness direction can be greater than the dimension of the battery protection board 3 in the thickness direction of the battery cell 1, or the dimension of the battery cell 1 in its thickness direction can be equal to the dimension of the battery protection board 3 in the thickness direction of the battery cell 1; this disclosure does not impose any limitations on this.

[0067] Additionally, refer to Figure 1 and Figure 2As shown, the battery structure may also include a flexible circuit board 8, a portion of which extends into the cover layer 5 to be electrically connected to the battery protection board 3, and another portion extends out from the cover layer 5 to be electrically connected to external electrical components. By setting the flexible circuit board 8, power transmission is achieved.

[0068] Optionally, refer to Figures 1 to 4 As shown, the battery cell 1 includes a battery cell body 11 and a battery cell flange 13; the battery cell flange 13 extends to the side of the battery cell body 11 along the second direction B, and the extending direction of the battery cell flange 13 intersects with the thickness direction of the battery cell body 11.

[0069] In this embodiment, it should first be noted that the cell folding edge 13 can be mainly applied to soft-pack batteries. After the side sealing of the cell 1 is completed, the side sealing area of ​​the cell 1 will leave excess packaging material edges. By setting the cell folding edge 13, the excess material can be "hidden" to the outer surface of the cell body 11, thereby minimizing the volume after packaging.

[0070] In related technologies, the cell fold 13 is often arranged to extend in the thickness direction of the cell body 11, and the height dimension of the cell fold 13 in the thickness direction is often not greater than the thickness dimension of the cell body 11, so it has almost no impact on the thickness design of the battery structure.

[0071] When the height of the cell fold 13 in the cell thickness direction is greater than the thickness of the cell body 11, the thickness of the battery structure will be limited by the height of the cell fold 13 and cannot be made as thin as possible, which is not conducive to the design of a thinner battery structure.

[0072] For example, the minimum height of the cell fold 13 is about 2.5mm. When the thickness of the cell body 11 is less than 2.5mm, if the "vertical fold" solution is still adopted, the thickness of the battery structure will be limited by the height of the cell fold 13 and cannot be made as thin as possible, which is not conducive to the design of a thinner battery structure.

[0073] To address this issue, the inventors of this application devised a solution by modifying the extension direction of the cell fold 13. Instead of extending along the thickness direction of the cell body 11 in related technologies, the fold 13 is now positioned to intersect with the thickness direction of the cell body 11. This modification effectively reduces the height of the cell fold 13 in the thickness direction of the cell body 11, preventing it from affecting the thickness of the battery structure. For example, the cell fold 13 can be perpendicular to the thickness direction of the cell body 11, effectively preventing the height of the cell fold 13 from exceeding the thickness of the cell body 11 and thus affecting the design of a thinner battery structure.

[0074] In another embodiment, reference is made to... Figure 1 and Figure 2 As shown, the battery structure also includes a cell fixing layer 6 and a cell disassembly layer 7; the outer surface of the cell 1 includes a first region and a second region arranged in a staggered manner, the cell fixing layer 6 is disposed in the first region for connection with external components, and the cell disassembly layer 7 is disposed in the second region for disassembling the package of the cell 1.

[0075] In this embodiment, by setting the cell fixing layer 6 and the cell disassembly layer 7 in different areas on the outer surface of the cell 1, that is, without the two overlapping each other, the design of making the battery structure thinner can also be utilized.

[0076] Optionally, refer to Figure 1 and Figure 2 As shown, the second region is constructed as two side regions on the outer surface of the cell 1 in the second direction B. The first region is located between the two side regions and is spaced apart from the side regions. The side regions have side edges. The cell disassembly layer 7 is configured as two and is respectively disposed in the corresponding two side regions, and the cell disassembly layer 7 covers the side edges.

[0077] In this embodiment, firstly, by arranging the cell disassembly layer 7 in the side region and covering the side edge, the side edge can be effectively protected, improving its reliability and reducing the risk of encapsulation failure due to damage to the side edge. Secondly, the areas where the cell disassembly layer 7 is arranged on both sides of the cell 1 in the thickness direction can be close to the side edge, without needing to cover the entire side, thus reserving sufficient space for the arrangement of the cell fixing layer 6. For example, there can be two cell fixing layers 6, both of which can extend along the first direction A and can be spaced apart in the second direction B. However, this disclosure does not limit the specific arrangement of the cell fixing layers 6.

[0078] For example, there can be two cell disassembly layers 7, which can respectively wrap around the two side edges of the cell 1 in the second direction B. There can be at least two cell fixing layers 6 located between the two cell disassembly layers 7. Both the cell fixing layer 6 and the cell disassembly layer 7 can be constructed as adhesive layers.

[0079] This disclosure also provides an electrical device that includes the battery structure described above. The electrical device can be any type of electrical appliance, such as a portable electronic device including smartphones, ultra-thin laptops, wearable devices (like smartwatches), etc. However, this disclosure does not limit the specific type of electrical device.

[0080] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0081] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery structure, characterized in that, The battery structure includes a battery cell, a tab, and a battery protection board. The tab is electrically connected to the battery cell, and the battery protection board is electrically connected to the tab. The battery protection board is arranged on the outer side of the circumferential edge of the battery cell. In the thickness direction of the battery cell, the projection of the battery cell is a first projection, and the projection of the battery protection board is a second projection. The first projection and the second projection are staggered.

2. The battery structure according to claim 1, characterized in that, The battery cell includes a battery cell body and a top sealing boss; The top sealing boss is protrudingly connected to one side of the cell body along the first direction, and the electrode tab is connected to the top sealing boss and electrically connected to the cell body. The battery protection board and the top sealing boss are offset from each other in the first direction.

3. The battery structure according to claim 2, characterized in that, The tab protrudes along the first direction and is connected to the top sealing boss on the side away from the cell body.

4. The battery structure according to claim 2, characterized in that, The top sealing boss and the cell body define a groove; the battery structure also includes a filler that at least partially fills the groove and connects the cell body and the top sealing boss.

5. The battery structure according to claim 4, characterized in that, The battery protection board and the top sealing boss are spaced apart by a first gap in the first direction; The filler includes a first filler portion and a second filler portion that are connected to each other. The first filler portion fills the groove and connects the cell body and the top sealing boss. The second filler portion fills the first gap.

6. The battery structure according to claim 4, characterized in that, The cell body has a first thickness in its thickness direction; The filler and the top sealing boss have the second thickness and the third thickness in the thickness direction of the cell body, respectively; Wherein, the sum of the second thickness and the third thickness is not greater than the first thickness.

7. The battery structure according to any one of claims 1-6, characterized in that, The battery structure further includes a covering layer that covers at least a portion of the battery protection board and is connected to the battery cell.

8. The battery structure according to any one of claims 1-6, characterized in that, The dimension of the battery cell in its thickness direction is not less than the dimension of the battery protection board in the thickness direction of the battery cell.

9. The battery structure according to claim 1, characterized in that, The battery cell includes a battery cell body and a battery cell folded edge; The cell fold extends along the side of the cell body in the second direction, and the extension direction of the cell fold intersects with the thickness direction of the cell body.

10. The battery structure according to claim 1, characterized in that, The battery structure further includes a cell fixing layer and a cell disassembly layer; the outer surface of the cell includes a first region and a second region arranged in a staggered manner, the cell fixing layer is disposed in the first region for connection with external components, and the cell disassembly layer is disposed in the second region for disassembling the cell's packaging.

11. The battery structure according to claim 10, characterized in that, The second region is constructed as two side regions on the outer surface of the battery cell in a second direction, and the first region is located between the two side regions and is spaced apart from the side regions; The side region has a side edge, and the cell disassembly layer is configured as two layers and is respectively disposed in the two corresponding side regions, and the cell disassembly layer covers the side edge.

12. An electrical appliance, characterized in that, The electrical device includes the battery structure according to any one of claims 1-11.

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