Batteries and electronic products

Abstract

The present application provides a battery and an electronic product. The battery provided in the present application includes a case, a cell, and a sealing plate, the case is a hollow structure having an opening on one side, the sealing plate is hermetically connected to the opening, the cell is accommodated in an accommodation space between the case and the sealing plate, at least one end of the cell is a cell limiting surface, at least one side of the case has a limiting structure, a connecting member is further provided in the accommodation space, and the connecting member and the case are insulated from each other. The battery and electronic product provided in the present application are used to at least solve the technical problem that the stability of the battery cell being attached to the case is low.

Description

[Technical Field]

[0001] The present application relates to the field of battery technology, and more particularly to batteries and electronic products. [Background technology]

[0002] In recent years, the rapid development of electronic products has promoted the rapid development of the lithium-ion battery industry that supplies power to electronic products. The outer casings of existing lithium-ion batteries are mainly steel casings, aluminum casings, aluminum-plastic film flexible packaging, etc., among which batteries using aluminum-plastic film flexible packaging have low strength, poor pressure resistance, and are prone to packaging damage and leakage, posing a significant safety hazard. However, batteries packaged in metal casings such as steel casings and aluminum casings are becoming the mainstream lithium-ion battery product due to their high energy density.

[0003] However, existing batteries packaged in metal cases have low cell attachment stability, making them prone to shaking, which results in the tabs connected to the cells being pulled by force, degrading the quality of the battery. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application provides a battery and an electronic product to at least solve the technical problem that the cells are mounted in the case with low stability. [Means for solving the problem]

[0005] In order to achieve the above object, the present application provides a battery comprising a case, a cell, and a sealing plate, the case having a hollow structure with an opening on one side, the sealing plate being hermetically connected to the opening, the cell being accommodated in an accommodation space between the case and the sealing plate, at least one end of the cell being a cell limiting surface, at least one surface of the case having a limiting structure, a connecting member being further provided in the accommodation space, the connecting member and the case being insulated from each other, The cell includes at least one first pole piece and at least one second pole piece, a first tab is connected to at least one of the first pole pieces, a second tab is connected to at least one of the second pole pieces, the first tab is electrically connected to the case, the second tab is electrically connected to the connecting member, and the connecting member extends to the outside of the case through a through hole in the case.

[0006] In the battery provided by the present application, the limiting structure can effectively limit the installation position of the cell in the case, making the installation position of the cell accurate and thereby improving the installation stability of the cell in the case. The limiting structure ensures a good fitting relationship between the cell and the case, preventing problems such as cell shaking and affecting the service life of the battery.

[0007] In a possible embodiment, the case includes a bottom panel and a plurality of side panels connected in sequence from end to end, each of the side panels being connected to an edge of the bottom panel, and at least one of the side panels having the limiting structure.

[0008] In a possible embodiment, the limiting structure includes a limiting wall and a mounting wall connected to the limiting wall, the limiting wall being connected to an edge of the base plate and the mounting wall extending to the location of the opening.

[0009] In a possible embodiment, the limiting wall is a first inclined wall, one end of the first inclined wall is connected to an edge of the bottom plate, the other end of the first inclined wall is inclined in a direction away from the center of the case and is connected to the mounting wall, and the cell limiting surface abuts against the first inclined wall; The inclination angle of the first inclined wall relative to the central axis of the case is in the range of 20° to 80°.

[0010] In a possible embodiment, the limiting wall is a folding wall, the folding wall includes a first connecting wall and a second connecting wall connected to each other, the first connecting wall and the second connecting wall are angled, the first connecting wall is connected to an edge of the bottom plate, and the second connecting wall extends in a direction away from the center of the case and is connected to the mounting wall; The cell limiting surface abuts against the inner wall of the first connecting wall.

[0011] In a possible embodiment, the first connecting wall and the second connecting wall are perpendicular to each other, The height of the first connecting wall is from 1 / 4 times the height of the case to 1 / 2 times the height of the case.

[0012] In a possible embodiment, the limiting structure includes a second inclined wall, one end of the second inclined wall is connected to the bottom plate, and the other end of the second inclined wall is inclined in a direction away from the center of the case and extends to the position of the opening, and the cell limiting surface abuts against the second inclined wall; The inclination angle of the second inclined wall relative to the central axis of the case is in the range of 20° to 80°.

[0013] In a possible embodiment, the case further includes a skirt, the skirt being connected to each of the side panels, the sealing plate being connected to the skirt by welding, and the fusion depth at which the skirt is welded to the sealing plate being less than the thickness of the skirt.

[0014] In a possible embodiment, the at least one first pole piece and the at least one second pole piece have opposite polarities, the cell has a stacked region, the at least one first pole piece and the at least one second pole piece located in the stacked region are stacked on top of each other, and the at least one first pole piece and the at least one second pole piece located in the stacked region are both parallel to a plane on which the bottom plate is located and / or a plane on which the sealing plate is located; A separator is further provided between the at least one first pole piece and the at least one second pole piece.

[0015] In a possible embodiment, the first tab is electrically connected to at least one of the first pole pieces via the cell limiting surface, and the second tab is electrically connected to at least one of the second pole pieces via the cell limiting surface; A reinforcing member is provided on the mounting wall, the first tab is electrically connected to the reinforcing member, and insulating members are provided between the first tab and the mounting wall and between the second tab and the mounting wall, the through hole is opened in the mounting wall, the connecting member extends through the through hole to the outside of the mounting wall, and the connecting member and the mounting wall are insulated from each other.

[0016] In a possible embodiment, the first tab is electrically connected to at least one of the first pole pieces via the cell limiting surface, and the second tab is electrically connected to at least one of the second pole pieces via the cell limiting surface; A reinforcing member is provided on the second inclined wall, the first tab is electrically connected to the reinforcing member, and insulating members are provided between the first tab and the second inclined wall and between the second tab and the second inclined wall, the through hole is opened in the second inclined wall, the connecting member extends through the through hole to the outside of the second inclined wall, and the connecting member and the second inclined wall are insulated from each other.

[0017] In one possible embodiment, the case and the sealing plate are both made of metal, and the thickness of the plate material used for the case and the sealing plate is 10 μm to 150 μm; The case is press molded.

[0018] In a possible embodiment, the connection member includes a connection piece and a connection post electrically connected to each other, the connection piece is fixedly connected to the case via an insulating adhesive layer, the connection post is insulated from the case and each other via at least two insulating pads, and the connection post extends to the outside of the case through the through hole.

[0019] The present application further provides an electronic product including the battery.

[0020] In the battery provided by the present application, the limiting wall is a first inclined wall, which is inclined in a direction away from the center of the case, and an installation space is formed between the mounting wall and the cell, and this installation space can be used to attach reinforcing members and connecting members to the mounting wall, thereby avoiding interference between the reinforcing members or connecting members and the cell.

[0021] In the battery provided by the present application, the limiting wall is a folded wall, and thus an installation space is formed below the second connecting wall, i.e., between the mounting wall and the cell, and this installation space can be used to install reinforcing members and connecting members on the mounting wall, thereby avoiding interference between the reinforcing members or connecting members and the cell.

[0022] In the battery provided by the present application, the limiting structure includes a second inclined wall, which facilitates the formation of an installation space between the second inclined wall and the cell, and this installation space can be used to install a reinforcing member and a connecting member on the second inclined wall, thereby avoiding interference between the reinforcing member or the connecting member and the cell.

[0023] In the battery provided by the present application, when the limiting wall is the first inclined wall, the position of the cell within the case is restricted by the blocking action of the first inclined wall; when the limiting wall is a bent wall, the position of the cell within the case is restricted by the abutment between the inner wall of the first connecting wall and the cell; when the limiting structure includes the second inclined wall, the position of the cell within the case is restricted by the second inclined wall, thereby restricting the shaking of the cell within the case and helping to ensure the stability of the cell installation, and also preventing the second tab and / or the first tab from being pulled by force due to the shaking of the cell, which would affect the service life.

[0024] In addition to the technical problems solved by the embodiments of the present application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the batteries and electronic products provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be described in more detail in the detailed description of the invention. [Brief explanation of the drawings]

[0025] In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. The accompanying drawings in the following description are part of the embodiments of the present application, and it will be obvious that those skilled in the art can derive other drawings based on these drawings without exerting creative efforts. [Figure 1] FIG. 1 is a schematic diagram showing the three-dimensional structure of a battery provided in an example of the present application. [Figure 2] FIG. 1 is an exploded view of a battery provided in an example of the present application. [Figure 3] FIG. 2 is a schematic diagram showing another three-dimensional structure of the battery provided in the examples of the present application. [Figure 4] FIG. 1 is a front view of a battery provided in Example 1 of the present application. [Figure 5] FIG. 1 is an exploded view of the battery provided in Example 1 of the present application. [Figure 6] FIG. 1 is a right side view of the battery provided in Example 1 of the present application. [Figure 7] FIG. 7 is a cross-sectional view of the battery provided in Example 1 of the present application taken along the line AA in FIG. 6. [Figure 8] FIG. 2 is a front view of the battery provided in Example 2 of the present application. [Figure 9] FIG. 2 is a right side view of the battery provided in Example 2 of the present application. [Figure 10] FIG. 9 is a cross-sectional view of the battery provided in Example 2 of the present application taken along the line BB in FIG. 8. [Figure 11] FIG. 2 is a top view of the battery provided in Example 2 of the present application. [Figure 12] FIG. 1 is a front view of a battery provided in Example 3 of the present application. [Figure 13] FIG. 1 is a right side view of the battery provided in Example 3 of the present application. [Figure 14] FIG. 14 is a cross-sectional view of the battery provided in Example 3 of the present application taken along the CC cross section of FIG. 13. [Figure 15] FIG. 1 is a top view of the battery provided in Example 3 of the present application. [Figure 16] FIG. 2 is a schematic diagram showing the three-dimensional structure of the battery provided in Example 3 of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below in conjunction with the accompanying drawings in the present application, but it is clear that the described embodiments are only a part of the embodiments in the present application, and are not all of the embodiments. All other embodiments that a person skilled in the art can obtain based on the embodiments of the present application without any creative efforts belong to the protection scope of the present application.

[0027] Due to factors such as cell processing errors, when a cell is installed inside a steel battery case, a certain amount of space is left, allowing the cell to vibrate within this space. This vibrating of the cell is detrimental to the transportation and distribution of the battery, and also causes the tabs to be pulled by force due to the vibrating of the cell, resulting in a deterioration in the quality of the finished battery and, in serious cases, affecting the service life of the battery.

[0028] In view of the above background, in the battery provided by the present application, the cells are accommodated in an accommodation space between a case and a sealing plate, and at least one side of the case has a limiting structure, which serves to limit the position of the cells inside, provides a certain fixing effect to the cells, and improves the stability of the cell installation.

[0029] Hereinafter, the batteries and electronic products provided in the embodiments of the present application will be described with reference to the accompanying drawings.

[0030] 1 and 2, the present application includes a case 10, a cell 20, and a sealing plate 30. The case 10 has a hollow structure with an opening 14 on one side, the sealing plate 30 is hermetically connected to the opening 14, the cell 20 is accommodated in an accommodating space 15 between the case 10 and the sealing plate 30, and a connecting member 90 is further provided in the accommodating space 15, and the connecting member 90 and the case 10 are insulated from each other.

[0031] 2 and 7, the cell 20 includes at least one first pole piece 21 and at least one second pole piece 22, a first tab connected to at least one first pole piece 21, a second tab connected to at least one second pole piece 22, the first tab electrically connected to the case 10, the second tab electrically connected to a connecting member 90, and the connecting member 90 extending to the outside of the case 10 through a through-hole in the case 10. At least one end of the cell 20 is a cell limiting surface 23, and at least one surface of the case 10 has a limiting structure 50.

[0032] In the battery provided by the present application, at least one side of the case 10 has a limiting structure 50, which can effectively limit the installation position of the cell 20 within the case 10, making the installation position of the cell 20 accurate and improving the installation stability of the cell 20 within the case 10. The limiting structure 50 ensures a good fit between the cell 20 and the case 10, and avoids problems such as shaking of the cell 20 that affect the service life of the battery.

[0033] As can be easily understood, at least one first pole piece 21 and at least one second pole piece 22 have opposite polarities, i.e., one of the first pole piece 21 and the second pole piece 22 is a positive pole piece and the other is a negative pole piece, and a separator is further provided between the at least one first pole piece 21 and the at least one second pole piece 22, which separates the first pole piece 21 and the second pole piece 22 and prevents the first pole piece 21 and the second pole piece 22 from coming into contact and causing a short circuit.

[0034] The cell 20 has a stacked region, and at least one first pole piece 21 and at least one second pole piece 22 located in the stacked region are stacked on top of each other, and the at least one first pole piece 21 and at least one second pole piece 22 located in the stacked region are both parallel to the plane on which the bottom plate 11 is located, or the at least one first pole piece 21 and at least one second pole piece 22 located in the stacked region are both parallel to the plane on which the sealing plate 30 is located. In this way, the energy density of the battery can be increased.

[0035] As can be easily understood, when the cell 20 is a wound cell, the flat-shaped cell 20 has two arcuate side edges, the area between the two arcuate side edges is a stacked area, and the first pole piece 21 and the second pole piece 22 in the stacked area are parallel to each other.

[0036] Referring to Figures 2 and 3, the case 10 includes a bottom panel 11 and a plurality of side panels 12 connected in sequence from end to end, each of which is connected to an edge of the bottom panel 11, and at least one of the side panels 12 has a limiting structure 50.

[0037] Here, the multiple side panels 12 may be four side panels 12, and the four side panels 12 may be a first side edge panel 121, a second side edge panel 122, a third side edge panel 123, and a fourth side edge panel 124, respectively, and the first side edge panel 121, the second side edge panel 122, the third side edge panel 123, and the fourth side edge panel 124 are connected sequentially from end to end and all connected to the edge of the bottom panel 11, and the fourth side edge panel 124 has a limiting structure 50.

[0038] The case 10 and the sealing plate 30 are both made of metal materials such as stainless steel, aluminum, or other materials, and the materials of the case 10 and the sealing plate 30 may be the same or different. Using metal materials makes the battery packaging easier and results in little loss of battery energy density.

[0039] In one possible embodiment, the case 10 and sealing plate 30 have a plate thickness of 10 μm to 150 μm, which provides sufficient strength to protect the cells 20. However, if the material is too thick, it will increase the volume of the battery, affecting the battery's energy density and increasing the battery's weight, making it inconvenient to carry. The case 10 is press-molded, making it easy to process and capable of fixing the cells 20.

[0040] In a possible embodiment, for example, the case 10 may be press-molded using stainless steel having a thickness of 10 μm, 50 μm, 70 μm, or 100 μm, and the sealing plate 30 may be machine-molded using stainless steel having a thickness of 10 μm, 50 μm, 70 μm, or 100 μm.

[0041] In a possible embodiment, the bottom plate 11, the first side edge plate 121, the second side edge plate 122, the third side edge plate 123, and the fourth side edge plate 124 are integrally molded, and the first side edge plate 121, the second side edge plate 122, and the third side edge plate 123 are all vertically connected to the bottom plate 11.

[0042] As can be easily understood, the first side edge plate 121, the second side edge plate 122, and the third side edge plate 123 may be smoothly transitioned and connected to the edge of the bottom plate 11.

[0043] In a possible embodiment, the bottom plate 11 may be square or rectangular.

[0044] In a possible embodiment, the case 10 further includes a skirt 13, which is located on the edge of the opening 14, and which is connected to the first side edge plate 121, the second side edge plate 122, the third side edge plate 123 and the fourth side edge plate 124, and the sealing plate 30 is connected to the skirt 13.

[0045] In a possible embodiment, the skirt 13 may be smoothly transitioned and connected to the first side edge plate 121, the second side edge plate 122, and the third side edge plate 123, all of which are perpendicular to the skirt 13.

[0046] The sealing plate 30 is welded to the skirt 13, and the fusion depth of the skirt 13 welded to the sealing plate 30 is less than the thickness of the skirt 13. In this way, the sealing plate 30 is flatly and firmly fixed and connected to the skirt 13, and a good welding effect can be obtained.

[0047] In this embodiment, laser welding is used to weld the sealing plate 30 onto the skirt 13, which meets the need for high-precision welding. Of course, in other embodiments, other welding methods such as ultrasonic welding may be used.

[0048] Example 1 3 and 4, the restriction structure 50 includes a restriction wall 60 and a mounting wall 70 connected to the restriction wall 60, the mounting wall 70 being connected to one end of the restriction wall 60, the restriction wall 60 being connected to the edge of the bottom plate 11, and the mounting wall 70 extending to the position of the opening 14.

[0049] In a possible embodiment, referring to FIGS. 4 and 5, the mounting wall 70 may extend vertically along a direction perpendicular to the bottom plate 11 up to the position of the opening 14 .

[0050] In this embodiment, referring to Figures 6 and 7, the limiting wall 60 is a first inclined wall 61, one end of which is connected to the edge of the bottom plate 11, the other end of which is inclined away from the center of the case 10 and is connected to the mounting wall 70, and the cell limiting surface 23 abuts against the first inclined wall 61.

[0051] In a possible embodiment, the cell limiting surface 23 abuts against the surface of the first inclined wall 61 closest to the cell 20, and since the first inclined wall 61 is arranged at an angle, the blocking effect of the first inclined wall 61 limits the position of the cell 20, ensuring accurate installation of the cell 20 within the case 10, and the mutual abutment between the cell limiting surface 23 and the first inclined wall 61 limits the shaking of the cell 20 within the case 10.

[0052] The first tab is electrically connected to at least one first pole piece 21 via the cell limiting surface 23, and the second tab is electrically connected to at least one second pole piece 22 via the cell limiting surface 23.

[0053] A reinforcing member 40 is provided on the mounting wall 70, the first tab is electrically connected to the reinforcing member 40, and insulating members are provided between the first tab and the mounting wall 70 and between the second tab and the mounting wall 70, a through hole is opened in the mounting wall 70, the connecting member 90 extends through the through hole to the outside of the mounting wall 70, and the connecting member 90 and the mounting wall 70 are insulated from each other.

[0054] One end of the first inclined wall 61 is connected to the edge of the bottom plate 11, and the other end of the first inclined wall 61 is inclined away from the center of the case 10, thereby forming an installation space 71 between the mounting wall 70 and the cell 20, and the installation space 71 is located within the storage space 15. This installation space 71 can be used to install the reinforcing member 40 and the connecting member 90 on the mounting wall 70, thereby avoiding interference between the reinforcing member 40 and the connecting member 90 and the cell 20.

[0055] In a possible embodiment, a first tab connected to the cell 20 is electrically connected to the reinforcing member 40, and a second tab connected to the cell 20 is electrically connected to the connecting member 90. The reinforcing member 40 may be a reinforcing sheet, and is used to increase the local mechanical strength of the case 10, thus facilitating the series connection of multiple batteries and achieving the purpose of increasing capacity and pressure.

[0056] In a possible embodiment, referring to FIGS. 4 and 7, the inclination angle Φ of the first inclined wall 61 relative to the central axis of the case 10 is in the range of 20° to 80°.

[0057] As can be easily understood, if the inclination angle Φ of the first inclined wall 61 relative to the central axis of the case 10 is too small, the mounting space 71 formed between the mounting wall 70 and the cell 20 will be too small, which is likely to cause interference between the reinforcing member 40 and the connecting member 90 and the cell 20, as shown in Figures 4 and 6. Conversely, if the inclination angle Φ of the first inclined wall 61 relative to the central axis of the case 10 is too large, the volume of the case 10 will be too large, which is disadvantageous in increasing the energy density of the battery.

[0058] In a possible embodiment, the inclination angle Φ between the first inclined wall 61 and the central axis of the case 10 may be 20°, 30°, 45°, 60°, 70°, 80°, etc. In this way, it is possible to ensure that a sufficient mounting space 71 is formed between the mounting wall 70 and the cell 20, and further, it is possible to avoid the volume of the case 10 being too large, and there is little loss in battery energy density.

[0059] As can be easily understood, the central axis of the case 10 is located at the geometric center of the case 10 and is perpendicular to the plane on which the bottom plate 11 is located.

[0060] In a possible embodiment, the connecting member 90 includes a connecting piece and a connecting post that are electrically connected to each other, the connecting piece is fixedly connected to the case 10 via an insulating adhesive layer, the connecting post is insulated from the case 10 via at least two insulating pads, and the connecting post extends to the outside of the case 10 through a through-hole in the case 10. The two insulating pads are respectively located on both sides of the mounting wall 70 to completely insulate and separate the connecting post and the case 10.

[0061] In a possible embodiment, the connection piece and the connection post may be a welded connection, and the connection post may be a rivet or a pole post.

[0062] In this embodiment, referring to FIGS. 3 and 6, the mounting wall 70 smoothly transitions and connects to the skirt 13, and the mounting wall 70 and the skirt 13 are perpendicular to each other.

[0063] As can be easily understood, one of the first tab and the second tab is a positive electrode tab and the other is a negative electrode tab, and the positive electrode tab is electrically connected to the positive electrode piece; negative The electrode tab is electrically connected to the negative electrode piece.

[0064] 5 and 6, the mounting wall 70 further has a liquid injection hole 16 communicating with the receiving space 15, and the electrolyte is injected into the receiving space 15 through the liquid injection hole 16, immersing the cell 20 in the electrolyte. The reinforcing member 40, the connecting post, and the liquid injection hole 16 may be arranged side by side and spaced apart from one another.

[0065] Example 2 4 and 8, the restriction structure 50 includes a restriction wall 60 and a mounting wall 70 connected to the restriction wall 60, the mounting wall 70 being connected to one end of the restriction wall 60, the restriction wall 60 being connected to the edge of the bottom plate 11, and the mounting wall 70 extending vertically to the position of the opening 14.

[0066] 9 and 10, in this embodiment, the limiting wall 60 is a bent wall 62, and the bent wall 62 includes a first connecting wall 621 and a second connecting wall 622 connected to each other, the first connecting wall 621 and the second connecting wall 622 are angled, the first connecting wall 621 is connected to the edge 11 of the bottom plate 11, the second connecting wall 622 extends in a direction away from the center of the case 10 and is connected to the mounting wall 70, and the cell limiting surface 23 abuts against the inner wall of the first connecting wall 621.

[0067] The inner wall of the first connecting wall 621 limits the position of the cell 20, thereby ensuring that the installation position of the cell 20 within the case 10 is accurate, thereby limiting the shaking of the cell 20 within the case 10 and helping to ensure the stability of the installation of the cell 20.

[0068] The mounting wall 70 is provided with a reinforcing member 40, the first tab is electrically connected to the reinforcing member 40, and insulating members are provided between the first tab and the mounting wall 70 and between the second tab and the mounting wall 70, through-holes are opened in the mounting wall 70, the through-holes penetrate both the inside and outside of the mounting wall 70, the connecting member 90 extends through the through-holes to the outside of the mounting wall 70, and the connecting member 90 and the mounting wall 70 are insulated from each other.

[0069] The second connecting wall 622 extends away from the center of the case 10 and is connected to the mounting wall 70, thus forming an mounting space 71 below the second connecting wall 622, i.e., between the mounting wall 70 and the cell 20, which can be used to mount the reinforcing member 40 and the connecting member 90 to the mounting wall 70, thereby avoiding interference between the reinforcing member 40 and the connecting member 90 and the cell 20.

[0070] In a possible embodiment, the angle between the first connecting wall 621 and the second connecting wall 622 may be 90°, i.e., the first connecting wall 621 and the second connecting wall 622 are perpendicular to each other, the first connecting wall 621 and the bottom plate 11 are perpendicular to each other, and the first connecting wall 621 and the edge of the bottom plate 11 may smoothly transition and connect.

[0071] In a possible embodiment, the height of the first connecting wall 621 is from ¼ to ½ of the height of the case 10. In this way, it is possible to leave a sufficient height space on the mounting wall 70, ensuring that there is sufficient height space on the mounting wall 70 for mounting the reinforcing member 40 and the connecting portion 90.

[0072] In possible embodiments, the height of the first connecting wall 621 may be 1 / 4 times the height of the case 10, 1 / 2 times the height of the case 10, or 1 / 3 times the height of the case 10, so that the mounting wall 70 has sufficient height to facilitate attachment of the reinforcing member 40 and the connecting portion 90 to the mounting wall 70.

[0073] Referring to Figures 9 and 10, the first tab is electrically connected to at least one first pole piece 21 via the cell limiting surface 23, and the second tab is electrically connected to at least one second pole piece 22 via the cell limiting surface 23.

[0074] In a possible embodiment, the connection member 90 is electrically connected to the second tab, and the first tab is electrically connected to the reinforcing member 40. The reinforcing member 40 may be a reinforcing piece, which is used to locally increase the mechanical strength of the case 10 and locally increase the wall thickness of the case 10, thus facilitating the series connection of multiple batteries and achieving the purpose of increasing capacity and pressure.

[0075] In a possible embodiment, the connecting post may be a rivet or a pole post.

[0076] In a possible embodiment, the insulating member provided between the first tab and the mounting wall 70 may be an insulating pad that provides insulation between the first tab and the mounting wall 70, and the insulating member provided between the second tab and the mounting wall 70 may be an insulating pad that provides insulation between the second tab and the mounting wall 70.

[0077] In a possible embodiment, the connection member 90 includes a connection piece and a connection post that are electrically connected to each other, the connection piece is fixedly connected to the case 10 via an insulating adhesive layer, the connection post is insulated from the case 10 via at least two insulating pads, and the connection post extends to the outside of the case 10 through a through-hole. The two insulating pads are respectively located on both sides of the mounting wall 70 to completely insulate and separate the connection post and the case 10.

[0078] In this embodiment, referring to FIG. 11, the mounting wall 70 smoothly transitions and connects to the skirt 13, and the mounting wall 70 and the skirt 13 are perpendicular to each other.

[0079] 5 and 9, the mounting wall 70 further has a liquid injection hole 16 communicating with the receiving space 15, through which an electrolyte is injected into the receiving space 15, and the cell 20 is immersed in the electrolyte. The reinforcing member 40, the connecting posts, and the liquid injection hole 16 may be arranged side by side and spaced apart from one another.

[0080] Example 3 In this embodiment, referring to Figures 12 and 14, the limiting structure 50 includes a second inclined wall 80, one end of which is connected to the bottom plate 11, the other end of which is inclined away from the center of the case 10 and extends to the position of the opening 14, and the cell limiting surface 23 abuts against the second inclined wall 80.

[0081] In a possible embodiment, the cell limiting surface 23 abuts against the end of the second inclined wall 80 that is closer to the cell 20, and the second inclined wall 80 restricts the cell 20, ensuring an accurate installation position of the cell 20 within the case 10, thereby limiting the shaking of the cell 20 within the case 10 and helping to ensure the stable installation effect of the cell 20.

[0082] 13 and 14, the second inclined wall 80 and the bottom plate 11 may be connected with a smooth transition, and referring to FIGS. 12 and 14, the inclination angle θ of the second inclined wall 80 with respect to the central axis of the case 10 is in the range of 20° to 80°. The structure in which the second inclined wall 80 is provided at an angle makes it easy to form an attachment space 71 between the second inclined wall 80 and the cell 20, and this attachment space 71 can be used to attach the reinforcing member 40 and the connecting member 90 to the second inclined wall 80, thereby avoiding interference between the reinforcing member 40 and the connecting member 90 and the cell 20.

[0083] The inclination angle θ of the second inclined wall 80 with respect to the central axis of the case 10 affects the size of the mounting space 71 formed between the second inclined wall 80 and the cell 20. As can be easily understood, if the inclination angle θ of the second inclined wall 80 with respect to the central axis of the case 10 is too small, the mounting space 71 formed between the second inclined wall 80 and the cell 20 will be too small, which will likely cause interference between the reinforcing member 40 and the connecting member 90 and the cell 20. Conversely, if the inclination angle θ of the second inclined wall 80 with respect to the central axis of the case 10 is too small, Second inclined wall 80 If the range of the inclination angle θ is too large, the volume of the case 10 becomes too large, which is disadvantageous in increasing the energy density of the battery.

[0084] In a possible embodiment, the inclination angle θ of the second inclined wall 80 relative to the central axis of the case 10 may be 20°, 30°, 45°, 60°, 70°, 80°, etc. In this way, it is possible to ensure that a sufficient mounting space 71 is formed between the second inclined wall 80 and the cell 20, and further, it is possible to prevent the volume of the case 10 from being too large, and there is almost no loss in battery energy density.

[0085] In this embodiment, referring to FIGS. 15 and 16, the second inclined wall 80 is smoothly transitioned and connected to the skirt 13, and there is an incline between the second inclined wall 80 and the skirt 13.

[0086] Referring to Figures 13 and 14, the first tab is electrically connected to at least one first pole piece 21 via the cell limiting surface 23, and the second tab is electrically connected to at least one second pole piece 22 via the cell limiting surface 23.

[0087] In a possible embodiment, the second inclined wall 80 is provided with a reinforcing member 40, the first tab is electrically connected to the reinforcing member 40, and insulating members are provided both between the first tab and the second inclined wall 80 and between the second tab and the second inclined wall 80.

[0088] In this embodiment, all the through holes are opened in the second inclined wall 80, the through holes penetrate both the inside and outside of the second inclined wall 80, the connecting member 90 extends through the through holes to the outside of the second inclined wall 80, and the connecting member 90 and the second inclined wall 80 are insulated from each other.

[0089] In a possible embodiment, the insulating member provided between the first tab and the second inclined wall 80 may be an insulating pad that provides insulation between the first tab and the second inclined wall 80, and the insulating member provided between the second tab and the second inclined wall 80 may be an insulating pad that provides insulation between the second tab and the second inclined wall 80.

[0090] 13 and 14, the connection member 90 includes a connection piece and a connection post electrically connected to each other, the connection piece is fixedly connected to the case 10 via an insulating adhesive layer, the connection post is insulated from the case 10 and each other via at least two insulating pads, and the connection post extends to the outside of the case 10 through a through hole.

[0091] The two insulating pads are respectively located on both sides of the second inclined wall 80 to completely insulate and separate the connecting post and the case 10 .

[0092] In a possible embodiment, the connecting posts may be rivets or pole posts, and the reinforcing members 40 may be reinforcing pieces, which are used to increase the local mechanical strength of the case 10, thus facilitating the series connection of multiple batteries and achieving the purpose of increasing capacity and pressure.

[0093] The second inclined wall 80 is further provided with a liquid injection hole 16 communicating with the accommodation space 15, and an electrolyte is injected into the accommodation space 15 through the liquid injection hole 16, immersing the cell 20 in the electrolyte. The reinforcing member 40, the connecting posts, and the liquid injection hole 16 may be arranged side by side and spaced apart from one another.

[0094] The battery provided by the embodiment of the present application has a restricting structure 50, which allows the cell 20 to be accurately mounted in the case 10, preventing the second tab and / or the first tab from being pulled and damaged due to the cell 20 shaking inside the case 10, improving the accuracy of the mounting position of the cell 20 and ensuring stable mounting of the cell 20.

[0095] In a possible embodiment, the connecting post is insulated from the case via an insulating washer and serves as the positive output terminal of the battery, and the reinforcing member 40 serves as the negative output terminal of the battery.

[0096] During processing, the case 10 is press-molded, the reinforcing member 40 is welded, the second tab is connected using the connecting member 90, and the liquid injection hole 16 is drilled. Next, the cell 20 is placed inside the case 10, the first tab is welded to the reinforcing member 40, the case 10 and the sealing plate 30 are positioned and joined, and the skirt 13 is laser-welded to the sealing plate 30. After that, excess material is laser-cut at a certain distance along the outside of the weld seam between the skirt 13 and the sealing plate 30, and the post-cutting burr is controlled to 30 μm or less. Immediately after cutting, the battery after cutting is placed in an oven and baked for a certain period of time, approximately 8 hours, to allow water and gas inside the battery to be expelled to the outside through the liquid injection hole 16. Thereafter, a certain amount of electrolyte is injected into the storage space 15 through the liquid injection hole 16, the liquid injection hole 16 is cleaned, and dirt is removed with a laser. Finally, a sealing member is welded to the liquid injection hole 16 by laser welding. The sealing member may be in the form of a piece so as to block and seal the liquid injection hole 16 and prevent the electrolyte from leaking from the liquid injection hole 16.

[0097] The present application further provides an electronic product including the battery described above. The battery is used for power supply.

[0098] The electronic products provided herein include, but are not limited to, mobile terminal devices, medical devices, etc., and other electronic products that require the above batteries.

[0099] In a possible embodiment, the electronic product provided by the present application is a mobile terminal, which may be, for example, a mobile phone, a tablet, a learning device, etc.

[0100] It should be noted that the numerical values ​​and numerical ranges in this application are approximate values, and there is a possibility that there may be a certain range of error due to the influence of the manufacturing process, and this error is considered to be negligible by those skilled in the art.

[0101] In the description of this application, the orientations or positional relationships indicated by the terms "center," "length," "width," "thickness," "tip," "bottom," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "axial direction," "circumferential direction," etc. are based on the drawings and are intended merely to simplify the description and explanation of this application. It should be understood that these do not indicate or imply that the designated positions or elements must have a specific orientation or operate in a specific structure, and therefore should not be understood as limiting this application.

[0102] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying relative importance or the number of the indicated technical features. Thus, a feature qualified as "first" or "second" may explicitly or implicitly include one or more features. In the present description, "plurality" means at least two, e.g., two, three, etc., unless otherwise specifically limited.

[0103] In this application, unless otherwise clearly specified and limited, the terms "attach," "couple," "connect," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, mutual communication, a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements or an interaction between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in this specification depending on the context.

[0104] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features not directly but via another feature between them. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may include being directly above and diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may include being directly below and diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0105] Finally, the above embodiments are only used to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or make equivalent substitutions for part or all of the technical features therein, and these modifications or substitutions shall not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application.

[0106] This application claims priority from a Chinese patent application bearing application number 2021110504315 and title "Batteries and Electronic Products" filed with the China Patent Office on September 8, 2021, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0107] 10 - case, 11 - bottom plate, 12 - side plate, 121 - first side edge plate, 122 - second side edge plate, 123 - third side edge plate, 124 - fourth side edge plate, 13 - skirt, 14 - opening, 15 - storage space, 16 - liquid injection hole, 20 - cell, 21 - first pole piece, 22 - second pole piece, 23 - cell limiting surface, 30 - sealing plate, 40 - reinforcing member, 50 - limiting structure, 60 - limiting wall, 61 - first inclined wall, 62 - bent wall, 621 - first connecting wall, 622 - second connecting wall, 70 - mounting wall, 71 - mounting space, 80 - second inclined wall, 90 - connecting member.

Claims

1. The device includes a case (10), a cell (20), and a sealing plate (30), wherein the case (10) has a hollow structure with an opening (14) on one side, the sealing plate (30) is hermetically connected to the opening (14), the cell (20) is accommodated in an accommodating space (15) between the case (10) and the sealing plate (30), at least one end of the cell (20) is a cell limiting surface (23), and a connecting member (90) is further provided within the accommodating space (15), and the connecting member (90) and the case (10) are insulated from each other. The cell (20) includes at least one first pole piece (21) and at least one second pole piece (22), a first tab is connected to at least one of the first pole pieces (21), a second tab is connected to at least one of the second pole pieces (22), the first tab is electrically connected to the case (10), the second tab is electrically connected to the connecting member (90), and the connecting member (90) extends to the outside of the case (10) through a through hole in the case (10), The case (10) includes a bottom panel (11) and a plurality of side panels (12) connected end to end, each of the side panels (12) being connected to an edge of the bottom panel (11), and at least one of the side panels (12) having a limiting structure (50); The limiting structure (50) includes a limiting wall (60) and a mounting wall (70) connected to the limiting wall (60), the limiting wall (60) is connected to an edge of the bottom plate (11), and the mounting wall (70) extends to the position of the opening (14); The limiting wall (60) is a first inclined wall (61), one end of which is connected to the edge of the bottom plate (11), the other end of which is inclined in a direction away from the center of the case (10) and connected to the mounting wall (70), and the cell limiting surface (23) abuts against the first inclined wall (61); The inclination angle of the first inclined wall (61) relative to the central axis of the case (10) is in the range of 20° to 80°. A battery characterized by:

2. The device includes a case (10), a cell (20), and a sealing plate (30), wherein the case (10) has a hollow structure with an opening (14) on one side, the sealing plate (30) is hermetically connected to the opening (14), the cell (20) is accommodated in an accommodating space (15) between the case (10) and the sealing plate (30), at least one end of the cell (20) is a cell limiting surface (23), and a connecting member (90) is further provided within the accommodating space (15), and the connecting member (90) and the case (10) are insulated from each other. The cell (20) includes at least one first pole piece (21) and at least one second pole piece (22), a first tab is connected to at least one of the first pole pieces (21), a second tab is connected to at least one of the second pole pieces (22), the first tab is electrically connected to the case (10), the second tab is electrically connected to the connecting member (90), and the connecting member (90) extends to the outside of the case (10) through a through hole in the case (10), The case (10) includes a bottom panel (11) and a plurality of side panels (12) connected end to end, each of the side panels (12) being connected to an edge of the bottom panel (11), and at least one of the side panels (12) having a limiting structure (50); The limiting structure (50) includes a second inclined wall (80), one end of which is connected to the bottom plate (11), the other end of which is inclined away from the center of the case (10) and extends to the position of the opening (14), and the cell limiting surface (23) abuts against the second inclined wall (80); The inclination angle of the second inclined wall (61) relative to the central axis of the case (10) is in the range of 20° to 80°. A battery characterized by:

3. The case (10) further includes a skirt (13), the skirt (13) is connected to each of the side panels (12), the sealing plate (30) is connected to the skirt (13) by welding, and the fusion depth of the skirt (13) welded to the sealing plate (30) is equal to or less than the thickness of the skirt (13).

3. The battery according to claim 1 or 2.

4. The at least one first pole piece (21) and the at least one second pole piece (22) have opposite polarities, the cell (20) has a stacked region, the at least one first pole piece (21) and the at least one second pole piece (22) located in the stacked region are stacked on top of each other, and the at least one first pole piece (21) and the at least one second pole piece (22) located in the stacked region are both parallel to a plane on which the bottom plate (11) is located and / or a plane on which the sealing plate (30) is located; A separator is further provided between the at least one first pole piece (21) and the at least one second pole piece (22).

3. The battery according to claim 1 or 2.

5. The first tab is electrically connected to at least one of the first pole pieces (21) through the cell limiting surface (23), and the second tab is electrically connected to at least one of the second pole pieces (22) through the cell limiting surface (23); A reinforcing member (40) is provided on the mounting wall (70), the first tab is electrically connected to the reinforcing member (40), and insulating members are provided between the first tab and the mounting wall (70) and between the second tab and the mounting wall (70), the through-hole is opened in the mounting wall (70), the connecting member (90) extends to the outside of the mounting wall (70) through the through-hole, and the connecting member (90) and the mounting wall (70) are insulated from each other.

2. The battery according to claim 1 .

6. The first tab is electrically connected to at least one of the first pole pieces (21) through the cell limiting surface (23), and the second tab is electrically connected to at least one of the second pole pieces (22) through the cell limiting surface (23); A reinforcing member (40) is provided on the second inclined wall (80), the first tab is electrically connected to the reinforcing member (40), and insulating members are provided between the first tab and the second inclined wall (80) and between the second tab and the second inclined wall (80), the through-hole is opened in the second inclined wall (80), the connecting member (90) extends through the through-hole to the outside of the second inclined wall (80), and the connecting member (90) and the second inclined wall (80) are insulated from each other.

3. The battery according to claim 2.

7. The case (10) and the sealing plate (30) are both made of metal, and the thickness of the plate material used for the case (10) and the sealing plate (30) is 10 μm to 150 μm.

3. The battery according to claim 1 or 2.

8. The connecting member (90) includes a connecting piece and a connecting post electrically connected to each other, the connecting piece is fixedly connected to the case (10) via an insulating adhesive layer, the connecting post is insulated from the case (10) via at least two insulating pads, and the connecting post extends to the outside of the case (10) through a through-hole of the case (10).

3. The battery according to claim 1 or 2.

9. The battery according to claim 1 or 2, An electronic product characterized by:

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