A battery and electrical device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI COSMX POWER CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-30
Smart Images
Figure CN224437718U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a battery and electrical equipment. Background Technology
[0002] For pouch batteries, in order to maximize the energy density of the battery and make full use of the space of the top sealing groove, the top sealing edge of the cell can be bent 90 degrees toward the deep pit surface of the cell, and then the protection board can be placed flat on the top sealing edge of the battery head.
[0003] Because the protective plate is placed flat on the top sealing edge after bending, and the lower part of the protective plate is only supported by the welded tabs and nickel sheets, the middle part of the protective plate is prone to bending and deformation when subjected to pressure, which in turn makes the tabs also prone to deformation due to the influence of the protective plate.
[0004] Therefore, how to reduce the risk of adverse effects on the battery cell after the protection board is subjected to pressure is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] One objective of this invention is to provide a battery that can effectively reduce the risk of adverse effects on the cell tabs when the protection board is under pressure, thereby improving the reliability of the battery; another objective is to provide an electrical device that includes the above-mentioned battery.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A battery includes: a core, a housing, and a protective plate. The housing covers the core, and a top sealing edge of the housing is bent toward the top surface of the core. The protective plate is parallel to the top surface and located on the top sealing edge. The core includes at least two tabs, and sections of the tabs extending beyond the top sealing edge are bent toward the top surface of the core and located between the protective plate and the top sealing edge. A first buffer pad is provided between the protective plate and the top sealing edge, and the first buffer pad is located between two adjacent tabs of the core. The core includes a straight section and an arc section, and at least one surface of the straight section opposite to the housing has an insulating layer in the region near the end of the core where the tabs are located.
[0008] In some embodiments, the outer periphery of the tab is covered with tab adhesive, and a first preset gap is provided between the tab adhesive exposed in the section of the top sealing edge and the first buffer pad.
[0009] In some embodiments, the first cushioning pad is a cushioning pad with a compressibility range of 30% to 50%, and / or the first cushioning pad is one or more of foam pads, aramid paper pads, and DuPont paper pads.
[0010] In some embodiments, the battery further includes an insulating member, which includes a first attachment portion, a second attachment portion, and a protective portion. One side of the protective portion is connected to a first side of the first attachment portion, and the other side is connected to a first side of the second attachment portion. A second side of the first attachment portion is fixed to one side of the membrane shell, and a second side of the second attachment portion is fixed to the other side of the membrane shell. The protective portion is located at the top of the top sealing edge, and the protective plate is located in the space between the protective portion and the top sealing edge. The battery further includes an FPC, one end of which is located inside the insulating member and electrically connected to the protective plate. The other end is led out from one end inside the insulating member and partially laid on one end of the outer end face of the protective portion. A second buffer pad is provided in a portion of the outer end face of the protective portion away from the FPC. The thickness of the second buffer pad is not less than the thickness of the portion of the FPC laid on the outer end face of the insulating member.
[0011] In some embodiments, the insulating element is a U-shaped adhesive tape; and / or, a second preset spacing is provided between the second buffer pad and the FPC; and / or, the projection of the second buffer pad on the outer end face of the insulating element covers at least one of the tabs; and / or, the projection of the second buffer pad on the outer end face of the insulating element at least partially overlaps with the projection of the first buffer pad on the outer end face of the insulating element; and / or, the thickness of the second buffer pad is 0.05~0.5mm greater than the thickness of the portion of the FPC laid on the outer end face of the insulating element.
[0012] In some embodiments, the outer periphery of the tab is covered with tab adhesive, and the projection range of the second cushioning pad on the top surface of the core covers the projection of at least one tab of tab adhesive exposed on the top edge of the top surface of the core.
[0013] In some embodiments, the second cushioning pad is a silicone pad.
[0014] In some embodiments, the length of the insulating layer in the first direction is greater than the length of the first buffer pad in the first direction, the two ends of the insulating layer extend beyond the two ends of the first buffer pad, and a third preset distance is provided between the two ends of the insulating layer and the arcuate sections on both sides of the core, wherein the first direction is the distribution direction of the two tabs on the core.
[0015] In some embodiments, the first end of the insulating layer is attached to the diaphragm of the winding core, and the second end of the insulating layer is attached to the electrode sheet of the winding core. The first end of the insulating layer is an end extending toward the top surface of the winding core, and the second end of the insulating layer is an end opposite to the first end of the insulating layer. A fourth preset distance is provided between the top edge of the first end of the insulating layer and the top edge of the diaphragm.
[0016] An electrical device comprising the battery described in any of the preceding claims.
[0017] Compared with existing technologies, the above technical solution has at least the following advantages:
[0018] The battery provided by this utility model features a first buffer pad between the protective plate and the top seal edge. This first buffer pad is located between two adjacent tabs on the core, filling the gap between the protective plate and the top seal edge to compensate for the thickness difference caused by the absence of tabs between them. Therefore, the first buffer pad provides support for the protective plate, preventing excessive bending or deformation towards the cell and reducing the risk of the tabs being stretched and deformed by the protective plate. This effectively improves battery reliability. Furthermore, at least one side of the flat section opposite the membrane shell has an insulating layer near the end of the core where the tabs are located. This insulating layer prevents the electrode at the core head from being pressed inwards or outwards, causing a short circuit and ensuring battery safety.
[0019] The electrical device provided by this utility model has corresponding advantages because it includes the aforementioned battery. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0021] Figure 1 A three-dimensional structural diagram of a battery provided for a specific embodiment of this utility model;
[0022] Figure 2 This is the front view of the battery;
[0023] Figure 3 for Figure 2 A schematic diagram of the structure after removing the insulating components;
[0024] Figure 4 for Figure 3 Enlarged view of region A in the image;
[0025] Figure 5 This is a schematic diagram of the main structure of the battery cell;
[0026] Figure 6 This is a top view of the battery cell structure.
[0027] The attached figures are labeled as follows:
[0028] 10-Membrane shell, 11-Top sealing edge, 20-Core, 21-Straight section, 22-Circular section, 23-Electrode tab, 24-Electrode tab adhesive, 25-Insulating layer, 201-Positive electrode, 202-Negative electrode, 203-Separator; 30-Insulating component, 31-First attachment part, 32-Second attachment part, 33-Protective part; 40-First buffer pad; 50-FPC; 60-Protective plate; 70-Second buffer pad. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Please refer to Figures 1 to 6The present invention provides a battery comprising: a battery cell and a protection plate 60. The battery cell includes a core 20 and a membrane shell 10. The membrane shell 10 is preferably an aluminum-plastic membrane shell 10, which covers the core 20. The top sealing edge 11 of the membrane shell 10 is bent toward the top surface of the core 20. The protection plate 60 is parallel to the top surface of the core 20 and is located on the top sealing edge 11. The core 20 includes a straight section 21, an arc section 22, and at least two tabs 23. The section of the tab 23 extending out of the top sealing edge 11 is bent toward the top surface of the core 20 and is located between the protection plate 60 and the top sealing edge 11, that is, the protection plate 60 can protect the tabs 23. Because the area between the protection plate 60 and the top sealing edge 11 of the existing battery without the tabs 23 is in a suspended state, the suspended area of the protection plate 60 is prone to deformation under pressure. The battery provided in this application has a first buffer pad 40 between the protection plate 60 and the top sealing edge 11, and the first buffer pad 40 is located between two adjacent tabs 23 of the core 20. That is, the first buffer pad 40 can fill the gap between the protection plate 60 and the top sealing edge 11 to compensate for the thickness difference caused by the absence of tabs 23 between the protection plate 60 and the top sealing edge 11. Therefore, the first buffer pad 40 can support the protection plate 60, thereby preventing the protection plate 60 from bending and deforming too much towards the cell, thus reducing the risk of the tabs 23 being deformed by the protection plate 60, and thus effectively improving the reliability of the battery. Furthermore, the battery provided in this application has an insulating layer 25 on at least one side of the surface of the flat section 21 opposite to the membrane shell 10, in the area near the end of the core 20 where the tab 23 is located. That is, the insulating layer 25 is provided on one or both sides of the surface of the flat section 21 opposite to the membrane shell 10. When the first buffer pad 40 is compressed, it will squeeze the electrode at the head of the core 20. The electrode at the head of the core 20 refers to the electrode at the end of the core 20 near the tab 23. The insulating layer 25 can prevent the electrode at the head of the core 20 from being pressed inward or outward and short-circuiting, thereby ensuring the safety of the battery.
[0031] In some embodiments, such as Figure 4 As shown, the outer periphery of the tab 23 is covered with tab adhesive 24. A first preset gap is provided between the section of tab adhesive 24 exposed at the top sealing edge 11 and the first buffer pad 40. The size of the first preset gap can be selected between 0 and 1 mm to avoid the first buffer pad 40 being squeezed by the tab 23 when compressed. In addition, the thickness of the first buffer pad 40 can be selected between 0.4 and 1 mm. The thickness of the first buffer pad 40 should not be too small or too large. If the thickness is too small, it will easily lead to insufficient support. If the thickness is too large, it will cause the middle of the protection plate 60 to arch, which will increase the length of the battery in the Y direction. Its outer end face does not exceed the outer end face of the tab 23, that is, the size of the first buffer pad 40 in the Y direction does not exceed the size of the tab 23 in the Y direction.
[0032] In some embodiments, the first buffer pad 40 is a buffer pad with a compressibility range of 30% to 50%. The compressibility of the buffer pad cannot be too large or too small. If the compressibility is too small, it cannot provide sufficient cushioning for the protection plate 60, failing to absorb impact force and increasing the risk of short circuit due to compression of the battery cell. If the compressibility is too large, it will lead to insufficient support, making the protection plate 60 prone to deformation. The thickness of the first buffer pad 40 should not be too large or too small. The top surface of the first buffer pad 40 does not exceed the top surface of the tab 23. When the tab 23 is connected to the protection plate 60 via a nickel sheet, the top surface of the first buffer pad 40 does not exceed the top surface of the nickel sheet. The first buffer pad 40 can be one or more of foam pads, aramid paper pads, and DuPont paper pads. For example, any two or three of these can be stacked in the Y direction, and / or any two or three can be distributed in the X direction.
[0033] In some embodiments, the battery further includes an insulating member 30, wherein the insulating member 30 includes a first attachment portion 31, a second attachment portion 32, and a protective portion 33. One side of the protective portion 33 is connected to a first side of the first attachment portion 31, and the other side is connected to a first side of the second attachment portion 32. The first attachment portion 31, the second attachment portion 32, and the protective portion 33 are preferably an integral structure. The second side of the first attachment portion 31 is fixed to one side of the membrane housing 10, and the second side of the second attachment portion 32 is fixed to the other side of the membrane housing 10. For example... Figure 1 As shown, the first side of the first attachment portion 31 is its upper side, and the second side is its lower side; the first side of the second attachment portion 32 is its upper side, and the second side is its lower side. The second side of the first attachment portion 31 is attached to one of the outer surfaces corresponding to the straight section 21 of the film shell 10 and the core 20, and the second side of the second attachment portion 32 is attached to the other side of the outer surface corresponding to the straight section 21 of the film shell 10 and the core 20. The protective portion 33 is located at the top of the top sealing edge 11, and the protective plate 60 is located in the space between the protective portion 33 and the top sealing edge 11. The battery also includes an FPC 50, one end of which is located inside the insulating member 30 and electrically connected to the protective plate 60, and the other end is led out from one end inside the insulating member 30 and partially laid on one end of the outer end face of the protective portion 33. The outer end face of the protective portion 33 refers to the end face of the protective portion 33 away from the battery cell, specifically as shown below. Figure 1 , Figure 2 and Figure 4As shown, the FPC50 includes a first section, a bending section, a second section, and a third section arranged sequentially. The first section is located within the first insulating member 30. The FPC50 is redirected by the bending section so that the second section is laid on the outer end face of the protective part 33. The third section is bent relative to the second section so that its end is away from the battery cell. A second buffer pad 70 is provided on the portion of the outer end face of the protective part 33 away from the FPC50. The second buffer pad 70 is preferably a silicone pad, and its thickness is not less than the thickness of the portion of the FPC50 laid on the outer end face of the protective part 33. Figure 1 and Figure 2 As shown, a section of FPC50 is laid on the right end of the outer end face of the protective part 33, for example, the second section of FPC50 mentioned above is laid on the right end of the outer end face of the protective part 33; a second buffer pad 70 is laid on the left end of the outer end face of the protective part 33. When the battery is placed in the battery compartment, the second buffer pad 70 will abut against the wall of the battery compartment, which can prevent the FPC50 from abutting against the wall of the battery compartment. Therefore, when the battery compartment is impacted, it will be cushioned by the second buffer pad 70 to avoid the risk of the FPC50 breaking due to the rigid impact of the battery compartment.
[0034] In some embodiments, the insulating member 30 is preferably a U-shaped adhesive tape, with two branch ends of the U-shaped adhesive tape fixed to both sides of the straight section 21 of the battery core, wherein the protective plate 60 is located inside the U-shaped adhesive tape, the outer end face of the U-shaped adhesive tape is a plane parallel to the top surface of the core 20, the second buffer pad 70 is attached to the outer end face of the U-shaped adhesive tape, one end of the FPC 50 is located inside the U-shaped adhesive tape to be electrically connected to the protective plate 60, and the other end extends from one side of the U-shaped adhesive tape and is bent to be attached to the end of the outer end face of the U-shaped adhesive tape away from the second buffer pad 70.
[0035] In some embodiments, a second preset gap is provided between the second buffer pad 70 and the FPC 50 to avoid overlap between the second buffer pad 70 and the FPC 50. The size of the second preset gap is at least 1 mm to provide room for the FPC 50 to move. If the second buffer pad 70 is too long, after the battery is placed in the battery compartment, the battery compartment will press the FPC 50 tightly through the second buffer pad 70, resulting in no room for the FPC 50 to move in the X and Y directions, thereby increasing the risk that the FPC 50 will be pulled apart when the battery is dropped.
[0036] In some embodiments, the projection of the second buffer pad 70 onto the outer end face of the insulating member 30 covers at least one tab 23 to protect the covered tab 23, for example... Figure 4As shown, the projection of the second buffer pad 70 in the Y direction covers the projection of the tab 23 on the left side in the Y direction. The length of the second buffer pad 70 in the X direction is greater than the length of the tab 23 in the X direction, and the two ends of the tab 23 in the X direction do not exceed the two ends of the second buffer pad 70 in the X direction.
[0037] In some embodiments, the projection of the second buffer pad 70 onto the outer end face of the insulating member 30 at least partially overlaps with the projection of the first buffer pad 40 onto the outer end face of the insulating member 30, such that the external force on the first buffer pad 40 can be partially transmitted to the first buffer pad 40 through the protective plate 60 to prevent the battery cell from being deformed by pressure. For example Figure 4 As shown, the projections of the second buffer pad 70 and the first buffer pad 40 in the Y direction partially overlap, that is, a portion of the structure at the right end of the second buffer pad 70 is located directly above a portion of the structure at the left end of the first buffer pad 40.
[0038] In some embodiments, the thickness of the second buffer pad 70 is 0.05 to 0.5 mm greater than the thickness of the portion of the FPC 50 laid on the outer end face of the insulating member 30. The thickness of the second buffer pad 70 should not be too large or too small. If the thickness is too large, it will increase the length of the battery in the Y direction. If the thickness is too small, it will reduce the movement space of the FPC 50, making it difficult to reduce the risk of the FPC 50 being pulled apart when the battery is dropped.
[0039] In some embodiments, the outer periphery of the tab 23 is covered with tab adhesive 24, the length of the tab adhesive 24 in a first direction being greater than the length of the tab 23 in the first direction. The length of the second buffer pad 70 in the first direction is greater than the length of the section of tab adhesive 24 on one tab 23 exposed above the top seal edge 11 in the first direction. The first direction is the distribution direction of the two tabs 23 on the battery cell. Figure 2 The X direction is shown. Preferably, the two ends of the second buffer pad 70 extend more than 1 mm beyond the two ends of the tab adhesive 24 to protect the tab 23.
[0040] In some embodiments, the insulating layer 25 is preferably adhesive tape, and the manufacturing process of the battery cell includes at least the following steps: after the core 20 is wound, adhesive tape is attached to the battery cell; the top sealing edge of the battery cell head is bent at 90 degrees, and adhesive is applied and pressure is maintained to ensure the bending effect; a first buffer pad 40 is attached to the top sealing edge, and then the protective plate 60 is placed on the top sealing edge of the battery cell; the FPC 50 is shaped by attaching U-shaped adhesive tape to the head of the battery cell, and then bending and shaping the FPC 50; finally, a second buffer pad 70 is attached to the outer end face of the U-shaped adhesive tape.
[0041] In some embodiments, the length of the insulating layer 25 in the first direction is greater than the length of the first buffer pad 40 in the first direction, and the two ends of the insulating layer 25 extend beyond the two ends of the first buffer pad 40, with each end of the insulating layer 25 extending by more than 1 mm. A third preset distance is provided between the two ends of the insulating layer 25 and the arcuate sections 22 on both sides of the core 20. That is, the insulating layer 25 is attached to the straight section 21 of the core 20, but not to the arcuate sections of the core 20, to avoid poor adhesion. Specifically, as shown... Figure 5 and Figure 6 As shown, the first direction is the distribution direction of the two tabs 23 on the core 20, that is... Figure 5 The X direction is shown.
[0042] In some embodiments, the first end of the insulating layer 25 is attached to the diaphragm 203 of the core 20, and the second end of the insulating layer 25 is attached to the electrode sheet of the core 20. The first end of the insulating layer 25 extends toward the top surface of the core 20, and the second end of the insulating layer 25 is opposite to the first end. A fourth predetermined spacing is provided between the top edge of the first end of the insulating layer 25 and the top edge of the diaphragm 203. The core 20 includes a positive electrode 201, a negative electrode 202, and a diaphragm 203 located between the positive electrode 201 and the negative electrode 202. The first end of the insulating layer 25 is attached to the positive electrode 201 sheet, and the second end of the insulating layer 25 is attached to the diaphragm 203 of the core.
[0043] This utility model embodiment also provides an electrical device, including the battery provided in any of the above embodiments. The electrical device can be a mobile phone, computer, etc., and includes a battery compartment in which the battery is placed. Regarding the beneficial effects of the electrical device, please refer to the battery provided in any of the above embodiments; further details will not be repeated here.
[0044] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0046] The present invention provides a detailed description of a battery and electrical device. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims
1. A battery, characterized by, include: The roll core (20), the membrane shell (10), and the protective plate (60) are provided. The membrane shell (10) covers the roll core (20), and the top sealing edge (11) of the membrane shell (10) is bent toward the top surface of the roll core (20). The protective plate (60) is parallel to the top surface and located on the top sealing edge (11). The roll core includes at least two tabs (23). The tabs (23) extend from the top sealing edge (11) and are bent toward the top surface of the roll core (20), and are located on the protective plate (60) and the top surface of the roll core (20). Between the top sealing edge (11), a first buffer pad (40) is provided between the protective plate (60) and the top sealing edge (11), and the first buffer pad (40) is located between two adjacent tabs (23) of the core (20). The core (20) includes a straight section (21) and an arc section (22). At least one side of the surface of the straight section (21) opposite to the membrane shell (10) is provided with an insulating layer (25) in the area near the end of the core (20) where the tab (23) is provided.
2. The battery of claim 1, wherein, The outer periphery of the tab (23) is covered with tab adhesive (24), and a first preset gap is provided between the tab adhesive (24) exposed in the section of the top sealing edge (11) and the first buffer pad (40).
3. The battery of claim 1, wherein, The first cushioning pad (40) is a cushioning pad with a compressibility range of 30% to 50%, and / or the first cushioning pad (40) is one or more of foam pads, aramid paper pads and DuPont paper pads.
4. The battery of claim 1, wherein, The battery also includes an insulating component (30), which includes a first attachment portion (31), a second attachment portion (32), and a protective portion (33). One side of the protective portion (33) is connected to the first side of the first attachment portion (31), and the other side is connected to the first side of the second attachment portion (32). The second side of the first attachment portion (31) is fixed to one side of the membrane shell (10), and the second side of the second attachment portion (32) is fixed to the other side of the membrane shell (10). The protective portion (33) is located at the top of the top sealing edge (11), and the protective plate (60) is located at the top of the protective edge (11). The space between the protective part (33) and the top sealing edge (11); the battery also includes an FPC (50), one end of which is located inside the insulating member (30) and electrically connected to the protective plate (60), and the other end is led out from one end inside the insulating member (30) and partially laid on one end of the outer end face of the protective part (33). A second buffer pad (70) is provided in a part of the outer end face of the protective part (33) away from the FPC (50), and the thickness of the second buffer pad (70) is not less than the thickness of the part of the FPC (50) laid on the outer end face of the protective part (33).
5. The battery of claim 4, wherein, The insulating element (30) is a U-shaped adhesive tape; and / or, a second preset gap is provided between the second buffer pad (70) and the FPC (50); and / or, the projection of the second buffer pad (70) on the outer end face of the insulating element (30) covers at least one of the tabs (23); and / or, the projection of the second buffer pad (70) on the outer end face of the insulating element (30) at least partially overlaps with the projection of the first buffer pad (40) on the outer end face of the insulating element (30); and / or, the thickness of the second buffer pad (70) is 0.05~0.5mm greater than the thickness of the portion of the FPC (50) laid on the outer end face of the insulating element (30).
6. The battery of claim 4, wherein, The outer periphery of the tab (23) is covered with tab adhesive (24), and the length of the second buffer pad (70) in the first direction is greater than the length of the section of tab adhesive (24) on one of the tabs (23) exposed on the top sealing edge (11) in the first direction. The first direction is the distribution direction of the two tabs (23) on the core (20).
7. The battery of claim 4, wherein, The second buffer pad (70) is a silicone pad.
8. The battery of claim 1, wherein, The length of the insulating layer (25) in the first direction is greater than the length of the first buffer pad (40) in the first direction. The two ends of the insulating layer (25) extend beyond the two ends of the first buffer pad (40). A third preset distance is provided between the two ends of the insulating layer (25) and the arc sections (22) on both sides of the core (20). The first direction is the distribution direction of the two tabs (23) on the core (20).
9. The battery of claim 8, wherein, The first end of the insulating layer (25) is attached to the diaphragm (203) of the core (20), and the second end of the insulating layer (25) is attached to the electrode sheet of the core (20). The first end of the insulating layer (25) is an end that extends toward the top surface of the core (20), and the second end of the insulating layer (25) is an end that is opposite to the first end of the insulating layer (25). A fourth preset distance is provided between the top edge of the first end of the insulating layer (25) and the top edge of the diaphragm (203).
10. An electric device, characterized by Includes the battery as described in any one of claims 1 to 9.