Battery cell and folding screen mobile phone

Abstract

The utility model discloses an electric core and a folding screen mobile phone, the electric core is manufactured by adopting a lamination process, the electric core is characterized by comprising a plurality of pole pieces, the plurality of pole pieces are laminated along a first direction, the electric core comprises a bending area, at least one pole piece penetrates through the bending area in the bending area, and at least one pole piece is broken, so that the electric core is suitable for being bent in the bending area. Specifically, after at least one pole piece is broken, the thickness of the battery cell in the bending area is thinned, so that the bending of the battery cell is facilitated. At least one pole piece penetrates through the bending area, so that the areas, located on the two sides of the bending area, of the pole piece are electrically coupled, and compared with the battery cell with the pole pieces on the two sides of the bending area which are not communicated with each other, the charging efficiency of the battery cell is higher. According to the utility model, through the joint cooperation of the pole pieces disconnected in the bending area and the pole pieces connected in the bending area, the battery cell has higher charging efficiency under the condition that the battery cell can be bent.

Description

Technical Field

[0001] The utility model relates to the field of new energy power energy storage, in particular to a battery cell and a folding screen mobile phone. Background Art

[0002] With the rapid development of technology and the continuous improvement of consumers' requirements for the portability and battery life of electronic products, folding screen mobile phones have gradually become the new favorites in the market. However, in the process of pursuing thinness, lightness and high performance, folding screen mobile phones face many challenges, and the most prominent problem is battery life.

[0003] In related technologies, traditional folding screen mobile phones usually only have one battery. The battery of the folding screen mobile phone is located on one side of the hinge, and the main board is located on the other side of the hinge. The battery needs to be connected to the main board through a specific flexible board. Since the battery of this structure can only be arranged in the space on one side of the hinge, the volume of the battery is small, so the electrode capacity of the battery is small, which not only limits the battery life of the mobile phone, but also restricts the overall performance of the mobile phone to a certain extent. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a battery cell and a folding screen mobile phone, which can improve the electrode capacity and charging efficiency on the premise of being able to be bent.

[0005] To achieve the above object, some embodiments of the first aspect of the utility model propose a battery cell, which includes a plurality of electrode plates. The plurality of electrode plates are stacked along a first direction. The battery cell includes a bending area. In the bending area, at least one electrode plate penetrates through the bending area, and at least one electrode plate is disconnected, so that the battery cell is suitable for bending in the bending area.

[0006] In some embodiments, the electrode plates include a plurality of anode plates, and the plurality of anode plates are all stacked along the first direction. In the bending area, the plurality of anode plates are all disconnected, so that the battery cell is suitable for bending in the bending area.

[0007] In some embodiments, the electrode plates include a plurality of anode plates, and the plurality of anode plates are all stacked along the first direction. In the bending area, the thickness of each of the plurality of anode plates is less than the thickness at other positions of itself, so that the battery cell is suitable for bending in the bending area.

[0008] In some embodiments, the electrode plates include a plurality of cathode plates, and the plurality of cathode plates are all stacked along the first direction. In the bending area, the plurality of cathode plates are all disconnected, so that the battery cell is suitable for bending in the bending area.

[0009] In some embodiments, the electrode plates include a plurality of cathode plates, and the plurality of cathode plates are all stacked along the first direction. In the bending area, the thickness of each of the plurality of cathode plates is less than the thickness at other positions of itself, so that the battery cell is suitable for bending in the bending area.

[0010] In some embodiments, the electrode includes a plurality of anode sheets and a plurality of cathode sheets. The plurality of anode sheets are stacked along a first direction, and the plurality of cathode sheets are stacked along the first direction. In the bending region, the plurality of anode sheets are disconnected, and the plurality of cathode sheets are disconnected, so that the battery cell is suitable for bending in the bending region;

[0011] Wherein, at least one anode sheet and / or at least one cathode sheet penetrates the bending region.

[0012] In some embodiments, the regions where the plurality of anode sheets are disconnected are separated from the regions where the plurality of cathode sheets are disconnected.

[0013] In some embodiments, in the bending region, the thicknesses of the plurality of anode sheets are all smaller than those at other positions of themselves, so that the battery cell is suitable for bending in the bending region;

[0014] And / or, in the bending region, the thicknesses of the plurality of cathode sheets are all smaller than those at other positions of themselves, so that the battery cell is suitable for bending in the bending region.

[0015] In some embodiments, the electrode includes a current collector and an active material layer. In the bending region, the electrode only includes the current collector;

[0016] And / or, in the bending region, the electrode includes a current collector and a partial active material layer.

[0017] An embodiment of the second aspect of the present invention provides a folding screen mobile phone, which includes the battery cell of any of the above embodiments. The folding screen mobile phone further includes a hinge, and the bending region of the battery cell corresponds to the hinge, so that the battery cell is suitable for bending along the hinge.

[0018] According to the above embodiments, the beneficial effects of the present invention are:

[0019] The battery cell of the present utility model includes a plurality of electrode sheets, and the plurality of electrode sheets are stacked and arranged in a first direction. The battery cell includes a bending area, and the battery cell can be bent at the bending area. Specifically, in the bending area, at least one electrode sheet is disconnected. After at least one electrode sheet is disconnected, the thickness of the battery cell in the bending area becomes thinner, which is beneficial to the bending of the battery cell. In the bending area, at least one electrode sheet penetrates through the bending area, so that the areas of the electrode sheet on both sides of the bending area remain electrically coupled. Compared with the battery cell in which the electrode sheets on both sides of the bending area are not connected to each other, the battery cell of the present utility model has a higher charging efficiency. Therefore, with the combined cooperation of the electrode sheet disconnected in the bending area and the electrode sheet connected in the bending area of the present utility model, the battery cell can be bent and has a higher charging efficiency. For example, when a folding screen mobile phone uses the battery cell of the present utility model, the battery cell of the present utility model can be bent. Therefore, the battery cell of the present utility model can make full use of the space on both sides of the hinge of the folding screen mobile phone. Compared with the battery cell that can only be arranged on one side of the hinge of the folding screen mobile phone, the battery cell of the present utility model has a larger electrode capacity, making the folding screen mobile phone equipped with the battery cell of the present utility model have a longer battery life. Compared with arranging two battery cells respectively in the spaces on both sides of the hinge of the folding screen mobile phone, the battery cells of the present utility model are electrically coupled in the bending area. Therefore, the battery cells of the present utility model have a higher charging efficiency, indirectly making the folding screen mobile phone equipped with the battery cells of the present utility model have a longer battery life.

[0020] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a schematic side view structure diagram of the battery cell structure in the first embodiment of the present utility model;

[0023] Figure 2 It is a schematic side view structure diagram of the battery cell structure in the second embodiment of the present utility model;

[0024] Figure 3 It is a schematic top view structure diagram of the anode sheet in an embodiment of the present utility model, where the anode sheet is disconnected in the bending area;

[0025] Figure 4 It is a schematic top view structure diagram of the cathode sheet in an embodiment of the present utility model, where the cathode sheet is disconnected in the bending area;

[0026] Figure 5 This is a top - view structural schematic diagram of the anode plate in an embodiment of the present utility model, where the anode plate is thinned in the bending area;

[0027] Figure 6 This is a top - view structural schematic diagram of the cathode plate in an embodiment of the present utility model, where the cathode plate is thinned in the bending area;

[0028] Figure 7 This is a side - view structural schematic diagram of the battery cell structure in the fourth embodiment of the present utility model, where the anode plate is disconnected and the cathode plate is thinned in the bending area;

[0029] Figure 8 This is a side - view structural schematic diagram of the battery cell structure in the third embodiment of the present utility model, where the cathode plate is disconnected and the anode plate is thinned in the bending area;

[0030] Figure 9 This is a side - view structural schematic diagram of the battery cell structure in the fifth embodiment of the present utility model, where both the anode plate and the cathode plate are thinned and disconnected in the bending area;

[0031] Figure 10 This is a structural schematic diagram of a folding - screen mobile phone in an embodiment of the present utility model;

[0032] Figure 11 This is a structural schematic diagram of a folding - screen mobile phone in another embodiment of the present utility model;

[0033] Figure 12 This is a structural schematic diagram of a folding - screen mobile phone in yet another embodiment of the present utility model.

[0034] Explanation of the reference numerals in the drawings:

[0035] Battery cell 10; Folding - screen mobile phone 20;

[0036] Anode plate 100;

[0037] Cathode plate 200;

[0038] Separator 300;

[0039] Bending area 400;

[0040] Hinge 500.

[0041] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or", "and / or", or "and / or" appear throughout the text, their meanings include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] In the related art, traditional folding screen mobile phones usually only have one battery. The battery of the folding screen mobile phone is located on one side of the hinge, and the main board is located on the other side of the hinge. The battery needs to be connected to the main board through a specific flexible board. Since the battery of this structure can only be arranged in the space on one side of the hinge, the volume of the battery is small, so the electrode capacity of the battery is small, which not only limits the battery life of the mobile phone, but also restricts the overall performance of the mobile phone to a certain extent.

[0046] Next, refer to Figures 1 to 12 to describe the battery cell 10 and the folding screen mobile phone 20 according to the embodiments of the present utility model. Refer to Figure 1 and Figure 2, the battery cell 10 of the present utility model includes a plurality of electrode plates, and the plurality of electrode plates are stacked along a first direction. The battery cell 10 includes a bending area 400, and the battery cell 10 can be bent at the bending area 400. Specifically, in the bending area 400, at least one electrode plate is disconnected. After at least one electrode plate is disconnected, the thickness of the battery cell 10 in the area of the bending area 400 becomes thinner, which is conducive to the bending of the battery cell 10. In the bending area 400, at least one electrode plate penetrates through the bending area 400, so that the areas of the electrode plate on both sides of the bending area 400 remain electrically coupled. Compared with the battery cell 10 in which the electrode plates on both sides of the bending area 400 are not connected to each other, the battery cell 10 of the present utility model has a higher charging efficiency. Therefore, with the combined cooperation of the electrode plate disconnected in the bending area 400 and the electrode plate connected in the bending area 400 of the present utility model, it is realized that under the condition that the battery cell 10 can be bent, it has a higher charging efficiency. For example, when the folding screen mobile phone 20 uses the battery cell 10 of the present utility model, the battery cell 10 of the present utility model can be bent. Therefore, the battery cell 10 of the present utility model can make full use of the space on both sides of the hinge 500 of the folding screen mobile phone 20. Compared with the battery cell 10 that can only be arranged on one side of the hinge 500 of the folding screen mobile phone 20, the battery cell 10 of the present utility model has a larger electrode capacity, making the folding screen mobile phone 20 equipped with the battery cell 10 of the present utility model have a longer battery life; compared with arranging two battery cells 10 respectively in the spaces on both sides of the hinge 500 of the folding screen mobile phone 20, the battery cell 10 of the present utility model is electrically coupled in the bending area 400. Therefore, the battery cell 10 of the present utility model has a higher charging efficiency, indirectly making the folding screen mobile phone 20 equipped with the battery cell 10 of the present utility model have a longer battery life.

[0047] It should be noted that in the above text, the meaning of "disconnected" is that the electrode plate is disconnected so that the battery cell 10 thins in the bending area 400. By disconnecting the electrode plate in the bending area 400, the purpose of thinning the battery cell 10 in the bending area 400 is achieved. The thinning of the battery cell 10 in the bending area 400 facilitates the bending of the battery cell 10 in the bending area 400. Regarding the structure of the electrode plate disconnected in the bending area 400, it can be understood that the electrode plate is disconnected along the length direction and along the thickness direction, and there are all-disconnected and partial-disconnected. The following examples are given according to the purpose pursued by the inventor for the above-disconnected structure, including but not limited to the following embodiments.

[0048] Regarding the disconnection of the electrode plate along the length direction, specifically, regarding the all-disconnection of the electrode plate along the length direction, refer to Figure 1 and Figure 2 , in some embodiments, at least one electrode plate does not pass through the bending area 400, that is, the electrode plate is divided into two parts by the bending area 400, that is, the electrode plate is all-disconnected. At this time, the electrode plate does not have a thickness in the bending area 400, so it is conducive to the bending of the battery cell 10 in the bending area 400. And at least one electrode plate still penetrates through the bending area 400 to maintain a connected state to ensure the charging efficiency. Regarding the partial disconnection of the electrode plate along the length direction, refer to Figure 3 and Figure 4, in some embodiments, at least one pole piece is partially disconnected, that is, along the axis of rotation direction of the bending of the battery cell 10, at least one pole piece is incomplete in the bending area 400, that is, part of the position of the pole piece in the bending area 400 remains connected, and the structure at part of the position in the bending area 400 is cut. For example, along the above axis of rotation direction, the upper half of the pole piece remains connected, and the lower half is cut, and the lower half of the pole piece at the bending area 400 is a hollow area.

[0049] Regarding the disconnection of the pole piece along the thickness direction, refer to Figure 5 and Figure 6 and Figure 9 , in some embodiments, the thickness of at least one pole piece is thinned in the bending area 400, and the thickness of the pole piece in the bending area 400 is thinned so that the thickness of the battery cell 10 in the bending area 400 is thinned, so that the battery cell 10 can be bent in the bending area 400. Of course, in this case, the pole piece still penetrates the bending area 400, that is, the pole pieces on both sides of the bending area 400 still remain electrically coupled. Compared with the battery cell 10 composed of pole pieces completely separated by the bending area 400, the battery cell 10 of the present invention has a higher charging efficiency.

[0050] Of course, it can be understood that the thinning of the pole piece thickness can be achieved by removing all the active material layers, or by removing part of the active material layers, or by removing the active material layers and / or part of the current collector, as long as the battery cell 10 using the pole piece can be bent in the bending area 400.

[0051] Of course, it can be understood that compared with the structure in which two independent sets of pole pieces are arranged on both sides of the bending area 400 so that the battery can be bent about the bending area 400, the battery cell 10 of the present invention still remains electrically coupled in the bending area 400. It can be understood that the case of the connected pole pieces has a smaller resistance than the case of the completely disconnected pole pieces, so the charging efficiency is higher. Therefore, the battery cell 10 of the present invention has a higher charging efficiency than the battery completely separated in the bending area 400. Based on the above principle, the inventor proposes that in some embodiments, on the premise of ensuring that the battery can be bent, by increasing the number of pole pieces penetrating the bending area 400, the charging efficiency of the battery cell 10 is improved.

[0052] Of course, it can be understood that the above embodiments can be combined arbitrarily to have the best charging efficiency under the condition that the battery cell 10 can be bent.

[0053] It can be understood that in some embodiments, part of the pole piece is cut off by laser or die cutting so that the pole piece is disconnected in the bending area 400.

[0054] Refer to Figure 7, in some embodiments, specifically, the electrode plate includes a plurality of anode plates 100, and the plurality of anode plates 100 are all stacked and arranged along the first direction. In the bending area 400, the plurality of anode plates 100 are all disconnected. The anode plates 100 are disconnected in the bending area 400, realizing the thickness reduction of the battery cell 10 in the bending area 400, so that the battery cell 10 can be bent in the bending area 400.

[0055] It can be understood that, in some embodiments, the anode plates 100 are completely disconnected, and in some embodiments, the anode plates 100 are partially disconnected. When the anode plates 100 are completely disconnected, the cathode plates 200 remain connected to ensure the charging efficiency of the battery cell 10; when the anode plates 100 are partially disconnected, the anode plates 100 still remain connected to ensure the charging efficiency of the battery cell 10.

[0056] Refer to Figure 8 , in some embodiments, the electrode plate includes a plurality of anode plates 100, and the plurality of anode plates 100 are all stacked and arranged along the first direction. In the bending area 400, the thickness of each of the plurality of anode plates 100 is less than the thickness at other positions of itself, so that the battery cell 10 is suitable for being bent in the bending area 400. The anode plates 100 are thinned so that the battery cell 10 can be bent in the bending area 400. When the anode plates 100 are thinned, the anode plates 100 still remain connected to ensure the charging efficiency of the battery cell 10.

[0057] Of course, it can be understood that, in some embodiments, the anode plates 100 are only thinned without being disconnected, and in some embodiments, the anode plates 100 are partially disconnected and the connected parts in the bending area 400 are thinned.

[0058] Refer to Figure 8 , in some embodiments, the electrode plate includes a plurality of cathode plates 200, and the plurality of cathode plates 200 are all stacked and arranged along the first direction. In the bending area 400, the plurality of cathode plates 200 are all disconnected. The cathode plates 200 are disconnected in the bending area 400, realizing the thickness reduction of the battery cell 10 in the bending area 400, so that the battery cell 10 can be bent in the bending area 400.

[0059] It can be understood that, in some embodiments, the cathode plates 200 are completely disconnected, and in some embodiments, the cathode plates 200 are partially disconnected. When the cathode plates 200 are completely disconnected, the anode plates 100 remain connected to ensure the charging efficiency of the battery cell 10; when the cathode plates 200 are partially disconnected, the cathode plates 200 still remain connected to ensure the charging efficiency of the battery cell 10.

[0060] Refer to Figure 7, in some embodiments, the electrode sheet includes a plurality of cathode sheets 200, and the plurality of cathode sheets 200 are all stacked and arranged in the first direction. In the bending region 400, the thickness of each of the plurality of cathode sheets 200 is less than that at other positions of itself, so that the battery cell 10 is adapted to be bent in the bending region 400. The cathode sheets 200 are thinned so that the battery cell 10 can be bent in the bending region 400. When the cathode sheets 200 are thinned, the cathode sheets 200 still remain connected to ensure the charging efficiency of the battery cell 10.

[0061] Of course, it can be understood that, in some embodiments, the cathode sheets 200 are only thinned and not disconnected. In some embodiments, the cathode sheets 200 are partially disconnected and the connected portions in the bending region 400 are thinned.

[0062] Referring to Figure 3 , Figure 4 and Figure 9 , in some embodiments, the electrode sheet includes a plurality of anode sheets 100 and a plurality of cathode sheets 200. The plurality of anode sheets 100 are all stacked and arranged in the first direction, the plurality of cathode sheets 200 are all stacked and arranged in the first direction, and the plurality of anode sheets 100 and the plurality of cathode sheets 200 are alternately stacked. In the bending region 400, the plurality of anode sheets 100 are disconnected, and the plurality of cathode sheets 200 are disconnected, so that the battery cell 10 is adapted to be bent in the bending region 400. Among them, at least one anode sheet 100 and / or at least one cathode sheet 200 penetrates the bending region 400. The anode sheets 100 and the cathode sheets 200 are both disconnected, so that the thickness of the battery cell 10 in the bending region 400 is further thinned compared with only disconnecting the anode sheets 100 or only disconnecting the cathode sheets 200, so as to facilitate the bending of the battery cell 10 in the bending region 400.

[0063] Referring to Figure 3 , Figure 4 and Figure 9, in some embodiments, the regions where the multiple anode sheets 100 are disconnected are separated from the regions where the multiple cathode sheets 200 are disconnected. That is, both the anode sheets 100 and the cathode sheets 200 are disconnected, and the position where the anode sheets 100 remain connected in the bending region 400 is on the lower half side of the rotation axis, the position where the anode sheets 100 are hollowed out in the bending region 400 is on the upper half side of the rotation axis, the position where the cathode sheets 200 remain connected in the bending region 400 is on the upper half side of the rotation axis, and the position where the cathode sheets 200 are hollowed out in the bending region 400 is on the lower half side of the rotation axis. With such an arrangement, after the anode sheets 100 and the cathode sheets 200 are laminated, the positions where the anode sheets 100 remain connected in the bending region 400 and the positions where the cathode sheets 200 remain connected in the bending region 400 are staggered. That is, in the bending region 400 of the battery cell 10, the thickness at the position where the anode sheets 100 remain connected in the bending region 400 is only provided by the anode sheets 100, and the thickness at the position where the cathode sheets 200 remain connected in the bending region 400 is only provided by the cathode sheets 200. Therefore, the thickness of the battery cell 10 in the bending region 400 is only provided by the anode sheets 100 or only provided by the cathode sheets 200. Compared with the case where the anode sheets 100 and the cathode sheets 200 are not disconnected, that is, the thickness of the battery is jointly provided by the anode sheets 100 and the cathode sheets 200, the thickness of the battery cell 10 of the present embodiment in the bending region 400 is nearly halved, so that the battery cell 10 of the present invention is more conducive to bending in the bending region 400. And since the cathode sheets 200 and the anode sheets 100 remain connected, the charging efficiency of the battery cell 10 of the present invention is guaranteed.

[0064] Referring to Figure 9 , in some embodiments, the electrode sheets include multiple anode sheets 100 and multiple cathode sheets 200. The multiple anode sheets 100 are all stacked in a first direction, and the multiple cathode sheets 200 are all stacked in the first direction. In the bending region 400, the thicknesses of the multiple anode sheets 100 are all smaller than the thicknesses at other positions of themselves, and the thicknesses of the multiple cathode sheets 200 are all smaller than the thicknesses at other positions of themselves, so that the battery cell 10 is suitable for bending in the bending region 400. The thicknesses of the multiple anode sheets 100 and the multiple cathode sheets 200 are reduced simultaneously so that the battery cell 10 is suitable for bending in the bending region 400, and the multiple anode sheets 100 and the multiple cathode sheets 200 are all in a connected state. Therefore, the charging efficiency of the battery cell 10 of the present invention is guaranteed.

[0065] The following systematically arranges the embodiments involved in the present invention. Referring to Figure 1 , Figure 2 and Figures 7 to 9, the battery cell 10 includes an anode sheet 100 and a cathode sheet 200. In the bending area 400, the anode sheet 100 has states of being completely disconnected, partially disconnected, only thinned, and partially disconnected and thinned, and the cathode sheet 200 has states of being completely disconnected, partially disconnected, only thinned, and partially disconnected and thinned. After freely combining and excluding the case where both the anode sheet 100 and the cathode sheet 200 are completely disconnected, the battery cell 10 has the following structures: the anode sheet 100 is completely disconnected and the cathode sheet 200 is partially disconnected; the anode sheet 100 is partially disconnected and the cathode sheet 200 is partially disconnected; the anode sheet 100 is only thinned and the cathode sheet 200 is partially disconnected; the anode sheet 100 is partially disconnected and thinned and the cathode sheet 200 is partially disconnected; the anode sheet 100 is completely disconnected and the cathode sheet 200 is only thinned; the anode sheet 100 is partially disconnected and the cathode sheet 200 is only thinned; the anode sheet 100 is only thinned and the cathode sheet 200 is only thinned; the anode sheet 100 is partially disconnected and thinned and the cathode sheet 200 is only thinned; the anode sheet 100 is completely disconnected and the cathode sheet 200 is partially disconnected and thinned; the anode sheet 100 is partially disconnected and the cathode sheet 200 is partially disconnected and thinned; the anode sheet 100 is only thinned and the cathode sheet 200 is partially disconnected and thinned; the anode sheet 100 is partially disconnected and thinned and the cathode sheet 200 is partially disconnected and thinned; the anode sheet 100 is partially disconnected and the cathode sheet 200 is completely disconnected; the anode sheet 100 is only thinned and the cathode sheet 200 is completely disconnected; the anode sheet 100 is partially disconnected and thinned and the cathode sheet 200 is completely disconnected.

[0066] Of course, the purpose of such a setting is to make the thickness of the battery cell 10 in the bending area 400 thinner to be suitable for bending, and at least one of the pole pieces remains connected. The above embodiments do not exhaust all the embodiments of the present invention, and the battery cell 10 structures based on this principle and purpose are all within the protection scope of the present invention.

[0067] Referring to Figures 10 to 12 , an embodiment of the second aspect of the present invention provides a folding screen mobile phone 20, which includes the battery cell 10 in any of the above embodiments. The folding screen mobile phone 20 further includes a hinge 500. The bending area 400 of the battery cell 10 corresponds to the hinge 500, and the battery cell 10 can be bent along the hinge 500.

[0068] Referring to Figure 1 and Figures 10 to 12, the battery cell 10 of the foldable screen mobile phone 20 of the present utility model includes a plurality of electrode sheets, and the plurality of electrode sheets are arranged in a stacked manner along a first direction. The battery cell 10 includes a bending area 400, and the battery cell 10 can be bent at the bending area 400. Specifically, in the bending area 400, at least one electrode sheet is disconnected. After at least one electrode sheet is disconnected, the thickness of the battery cell 10 in the area of the bending area 400 becomes thinner, which is beneficial to the bending of the battery cell 10. In the bending area 400, at least one electrode sheet penetrates through the bending area 400, so that the areas of the electrode sheet on both sides of the bending area 400 remain electrically coupled. Compared with the battery cell 10 in which the electrode sheets on both sides of the bending area 400 are not connected to each other, the battery cell 10 of the present utility model has a higher charging efficiency. Therefore, with the common cooperation of the electrode sheets disconnected in the bending area 400 and the electrode sheets connected in the bending area 400 of the present utility model, the battery cell 10 can be bent and has a higher charging efficiency. When the foldable screen mobile phone 20 uses the battery cell 10 of the present utility model, the battery cell 10 of the present utility model can be bent. Therefore, the battery cell 10 of the present utility model can make full use of the space on both sides of the hinge 500 of the foldable screen mobile phone 20. Compared with the battery cell 10 that can only be arranged on one side of the hinge 500 of the foldable screen mobile phone 20, the battery cell 10 of the present utility model has a larger electrode capacity, so that the foldable screen mobile phone 20 equipped with the battery cell 10 of the present utility model has a longer battery life; compared with arranging two battery cells 10 in the spaces on both sides of the hinge 500 of the foldable screen mobile phone 20 respectively, the battery cells 10 of the present utility model are electrically coupled in the bending area 400. Therefore, the battery cell 10 of the present utility model has a higher charging efficiency, indirectly making the foldable screen mobile phone 20 equipped with the battery cell 10 of the present utility model have a longer battery life.

[0069] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural transformations made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present utility model.

Claims

1. A battery cell is made by a stacking process, characterized in that, It includes a plurality of electrode sheets, and the plurality of electrode sheets are stacked and arranged in a first direction. The battery cell includes a bending region, and in the bending region, at least one of the electrode sheets penetrates the bending region, and at least one of the electrode sheets is disconnected, so that the battery cell is adapted to be bent in the bending region.

2. The battery cell according to claim 1, wherein, The electrode sheet includes a plurality of anode sheets, and the plurality of anode sheets are stacked and arranged in the first direction. In the bending region, the plurality of anode sheets are all disconnected, so that the battery cell is adapted to be bent in the bending region.

3. The battery cell according to claim 1, characterized in that, The electrode sheet includes a plurality of anode sheets, and the plurality of anode sheets are stacked and arranged in the first direction. In the bending region, the thicknesses of the plurality of anode sheets are all smaller than the thicknesses at other positions of the anode sheets themselves, so that the battery cell is adapted to be bent in the bending region.

4. The battery cell according to claim 1, wherein The electrode sheet includes a plurality of cathode sheets, and the plurality of cathode sheets are stacked and arranged in the first direction. In the bending region, the plurality of cathode sheets are all disconnected, so that the battery cell is adapted to be bent in the bending region.

5. The cell according to claim 1, characterized in that, The electrode sheet includes a plurality of cathode sheets, and the plurality of cathode sheets are stacked and arranged in the first direction. In the bending region, the thicknesses of the plurality of cathode sheets are all smaller than the thicknesses at other positions of the cathode sheets themselves, so that the battery cell is adapted to be bent in the bending region.

6. The battery cell according to claim 1, wherein The electrode sheet includes a plurality of anode sheets and a plurality of cathode sheets. The plurality of anode sheets are stacked and arranged in the first direction, and the plurality of cathode sheets are stacked and arranged in the first direction. In the bending region, the plurality of anode sheets are disconnected, and the plurality of cathode sheets are disconnected, so that the battery cell is adapted to be bent in the bending region; Wherein, at least one of the anode sheets and / or at least one of the cathode sheets penetrates the bending region.

7. The battery cell according to claim 6, wherein The regions where the plurality of anode sheets are disconnected are separated from the regions where the plurality of cathode sheets are disconnected.

8. The battery cell according to claim 6, wherein, In the bending region, the thicknesses of the plurality of anode sheets are all smaller than the thicknesses at other positions of the anode sheets themselves, so that the battery cell is adapted to be bent in the bending region; And / or, in the bending region, the thicknesses of the plurality of cathode sheets are all smaller than the thicknesses at other positions of the cathode sheets themselves, so that the battery cell is adapted to be bent in the bending region.

9. The battery cell according to claim 1, characterized in that, The electrode sheet includes a current collector and an active material layer. In the bending region, the electrode sheet only includes the current collector; And / or, in the bending region, the electrode sheet includes a current collector and a partial active material layer.

10. A foldable screen mobile phone, characterized in that, The folding screen mobile phone includes the battery cell according to any one of claims 1 to 9, and the folding screen mobile phone further includes a hinge, and the bending region corresponds to the hinge, so that the battery cell is adapted to be bent along the hinge.

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