Battery cell, foldable battery and electric device

Abstract

The invention relates to the technical field of batteries, in particular to a battery cell, a foldable battery and a power utilization device, the battery cell comprises a battery cell main body and a battery protection plate, the battery cell main body comprises a shell part and a pole, the pole is fixed on a placement end face of the shell part in a first direction, and the pole protrudes relative to the placement end face. The battery protection plate is fixed on the placement end face and is arranged side by side with the pole in the third direction. According to the battery cell, the foldable battery and the power utilization device provided by the invention, the performance and the use convenience of the battery cell are improved, the space of the battery cell is saved, the reliability of connection between the battery cell and external equipment is enhanced, and the overall performance and the applicability of the battery cell are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cell, a foldable battery, and an electrical device. Background Technology

[0002] In the field of battery technology, as electronic products become thinner, lighter, and more integrated, and as the requirements for battery energy density continue to increase, the efficient utilization of internal battery space has become a key technical challenge. In traditional battery structures, battery protection boards are often side-mounted or connected to the main body of the cell via long ribbon cables. Side-mounted protection boards increase the size of the cell in the width or thickness direction, making them unsuitable for space-constrained small smart wearable devices, ultra-thin laptops, and other products. The arrangement relying on long ribbon cables not only occupies space for the cables themselves but also requires space for cable storage and movement, further reducing the space available for battery material filling within the cell and lowering the battery's energy density. This makes it difficult to meet the market demand for high-capacity, small-volume battery products. Summary of the Invention

[0003] The purpose of this application is to provide a battery cell, a foldable battery, and a power device to address, to some extent, the existing technology where battery protection boards are mostly side-mounted or connected to the battery cell body via long ribbon cables. Side-mounted protection boards increase the size of the battery cell in the width or thickness direction, making it difficult to adapt to products with space constraints such as small smart wearable devices and ultra-thin laptops; while the arrangement relying on long ribbon cable connections not only occupies space for the cables themselves but also requires space for cable storage and movement, further reducing the space available for battery material filling inside the battery cell and lowering the battery's energy density. This technical problem makes it difficult to meet the market's demand for high-capacity, small-volume battery products.

[0004] According to a first aspect of this application, a battery cell is provided, wherein the length direction is a first direction, the thickness direction is a second direction, and the width direction is a third direction. The battery cell includes a battery cell body and a battery protection board. The battery cell body includes a shell and a terminal post. The terminal post is fixed to the mounting end face of the shell in the first direction, and the terminal post protrudes relative to the mounting end face. The battery protection board is fixed to the mounting end face and is arranged side by side with the terminal post in the third direction.

[0005] Preferably, the battery cell body further includes an electrode assembly disposed inside the shell portion, the shell portion being a conductive shell, the first polarity component of the electrode assembly being electrically connected to the electrode post, and the second polarity component of the electrode assembly being electrically connected to the shell portion; The battery protection board is electrically connected to the casing and the terminal posts, respectively.

[0006] Preferably, it further includes: A first connector is disposed on the mounting end face, and the first connector connects the mounting end face and the battery protection board; The second connector is disposed on the side of the battery protection board facing the mounting end face, and the second connector connects the terminal post and the battery protection board; An insulating gasket is disposed between the mounting end face and the second connector.

[0007] Preferably, the electrode post is positioned on the boundary of the side closest to the mounting end face; The battery protection board includes a rigid board and a flexible board. The rigid board and the terminal post are arranged side by side along the second direction, and the flexible board is disposed at the end of the rigid board away from the terminal post.

[0008] Preferably, the edge of the sidewall of the shell in the second direction is provided with a flange edge, and on the side where the mounting end face of the battery cell is located, the flange edge extends beyond the mounting end face by a predetermined distance in the first direction; It also includes an adhesive, which comprises a first adhesive portion and a second adhesive portion connected to each other, the first adhesive portion bonding the battery protection plate and the mounting end face, and the second adhesive portion bonding the battery protection plate and the flange edge.

[0009] According to a second aspect of this application, a foldable battery is provided, comprising a hinge assembly and at least two cells as described in any of the above-mentioned technical solutions, thus possessing all the beneficial technical effects of the cell, which will not be elaborated here.

[0010] Specifically, at least two of the battery cells are arranged side by side along a third direction, and adjacent two of the battery cells are hinged together via the hinge assembly.

[0011] Preferably, two adjacent battery cells are defined as the first battery cell and the second battery cell, respectively. The hinge assembly includes a first hinge frame, a first hinge pin, a second hinge frame, a second hinge pin, and a hinge base; The first hinge is fixedly connected to the first battery cell, and the second hinge is fixedly connected to the second battery cell. The first hinge and the second hinge are respectively disposed on both sides of the hinge seat. The first hinge shaft passes through the first hinge and the hinge seat along the first direction, and the second hinge shaft passes through the second hinge and the hinge seat along the first direction.

[0012] Preferably, the hinge seat includes a first connecting portion, a first hinge protrusion, and a second hinge protrusion, wherein the first connecting portion extends along the first direction; A plurality of first hinge protrusions are fixed on the side of the first connection portion near the first cell. The plurality of first hinge protrusions are spaced apart along the first direction to form a first groove between two adjacent first hinge protrusions. The first hinge includes a second connecting part and a plurality of third hinge protrusions. The second connecting part extends along the first direction, and the plurality of third hinge protrusions are fixed at intervals along the first direction on the side of the second connecting part facing the hinge seat. The third hinge protrusions are disposed in the first groove, and the first hinge shaft passes through the first hinge protrusion and the third hinge protrusions along the first direction. A plurality of second hinge protrusions are fixed on the side of the first connection portion near the second cell. The plurality of second hinge protrusions are spaced apart along the first direction to form a second groove between two adjacent second hinge protrusions. The second hinge includes a third connecting portion and a plurality of fourth hinge protrusions. The third connecting portion extends along the first direction, and the plurality of fourth hinge protrusions are fixed at intervals along the first direction on the side of the third connecting portion facing the hinge seat. The fourth hinge protrusions are disposed in the second groove, and the second hinge shaft passes through the second hinge protrusion and the fourth hinge protrusions along the first direction.

[0013] Preferably, the first connecting portion includes a connecting piece and a baffle that both extend along the first direction and are perpendicular to each other. The baffle is fixedly connected to one end of the connecting piece. The side of the third hinge protrusion away from the second connecting portion and the side of the fourth hinge protrusion away from the third connecting portion are both semi-cylindrical surfaces. Alternatively, the first connecting part is a sheet-like piece extending along the first direction, and both the third hinge protrusion and the fourth hinge protrusion are limiting protrusions. The limiting protrusion is formed by three types of enclosures: a first side surface, a second side surface, and a third side surface connected in sequence. The first side surface and the third side surface are parallel to each other and face each other. The first side surface and the second side surface have an arc transition, and the second side surface and the third side surface have a right angle transition.

[0014] The third aspect of this application also provides an electrical device that includes the battery cell described in any of the above embodiments, or includes the foldable battery described in any of the above embodiments, and thus has all the beneficial technical effects of the battery cell, which will not be repeated here.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The battery cell provided in this application significantly improves the performance and ease of use by fixing the terminal posts of the cell body to the housing end face and making them protrude relative to the housing end face, while fixing the battery protection board to the housing end face and setting it side by side with the terminal posts. This allows the battery protection board to achieve a tight and stable electrical connection directly with the terminal posts, reducing intermediate connection links, effectively reducing the contact resistance of the circuit connection, and improving the safety and stability of the cell during charging and discharging. The side-by-side arrangement of the battery protection board and the terminal posts on the housing end face, and the placement of the battery protection board within the space where the terminal posts are arranged in the cell, greatly saves space in the cell and makes it possible to miniaturize and lighten the cell design. The protruding terminal post design allows for better connection with external circuits, enhances the reliability of the cell's connection with external devices, and further improves the overall performance and applicability of the cell.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the exploded structure of a battery provided in an embodiment of this application; Figure 2 A partial structural diagram of the battery cell provided in an embodiment of this application; Figure 3 Another partial structural schematic diagram of the battery cell provided in the embodiments of this application; Figure 4 This is an exploded structural diagram of the hinge assembly provided in Embodiment 1 of this application; Figure 5 This is an isometric structural schematic diagram of the hinge assembly provided in Embodiment 1 of this application; Figure 6 This is an exploded view of the hinge assembly provided in Embodiment 2 of this application; Figure 7 This is an isometric structural diagram of the hinge assembly provided in Embodiment 2 of this application; Figure 8 A schematic diagram of the foldable battery in its unfolded state, as provided in an embodiment of this application. Figure 9 A schematic diagram of the foldable battery in a folded state, provided in an embodiment of this application. Figure 10 This is another isometric structural diagram of the foldable battery in its unfolded state, as provided in an embodiment of this application.

[0019] Figure label: 10-Battery cell body; 101-First battery cell; 102-Second battery cell; 103-Mounting end face; 104-Flange edge; 11-Terminal post; 121-Rigid board; 122-Flexible board; 131-First connector; 132-Second connector; 14-Insulating gasket; 15-Adhesive; 151-First adhesive part; 152-Second adhesive part; 16-Insulating adhesive tape; 17-Back adhesive; 2-Hinge assembly; 20-Limiting protrusion; 201- First side; 202-Second side; 203-Third side; 21-First hinge frame; 211-Second connecting part; 212-Third hinge protrusion; 22-Second hinge frame; 221-Third connecting part; 222-Fourth hinge protrusion; 23-Hinge seat; 230-First connecting part; 2301-Connecting piece; 2302-Baffle; 231-First hinge protrusion; 232-Second hinge protrusion; 24-First hinge shaft; 25-Second hinge shaft.

[0020] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0022] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The following reference Figures 1 to 10 This application describes a battery cell, a foldable battery, and an electrical device according to some embodiments thereof.

[0027] See Figures 1 to 10 As shown, an embodiment of the first aspect of this application provides a battery cell, which includes a battery cell body 10 and a battery protection board. The battery cell body 10 includes a shell portion and terminals 11. The terminals 11 are fixed to a mounting end face 103 of the shell portion in a first direction F1, and the terminals 11 protrude relative to the mounting end face 103. The battery protection board is fixed to the mounting end face 103 and arranged side by side with the terminals 11. In this way, by fixing the terminals 11 of the battery cell body 10 to the mounting end face 103 of the shell portion and making them protrude relative to the mounting end face 103, and simultaneously fixing the battery protection board to the mounting end face 103 and arranging it side by side with the terminals 11, the performance and ease of use of the battery cell are significantly improved. This design allows the battery protection board to achieve a tight and stable electrical connection with the terminal 11, reducing intermediate connection links, effectively lowering the contact resistance of the circuit connection, and improving the safety and stability of the battery cell during charging and discharging. The battery protection board and the terminal 11 are arranged side by side on the mounting end face 103, and the battery protection board is arranged in the space where the battery cell is arranged with the terminal 11, which greatly saves the space of the battery cell and makes it possible to miniaturize and lighten the design of the battery cell. The protruding terminal 11 design can better connect with external circuits, enhance the reliability of the connection between the battery cell and external devices, and further improve the overall performance and applicability of the battery cell.

[0028] like Figures 1 to 9 As shown in the figure, F1 can be an example of the first direction F1 described above. For ease of description, two intersecting directions on the plane intersecting the first direction F1 are defined as the second direction F2 and the third direction F3, respectively. F2 shown in the figure can be an example of the second direction F2 described above, and F3 shown in the figure can be an example of the third direction F3 described above. Preferably, as... Figures 1 to 9 As shown in the figure, an example is illustrated where any two of the three directions mentioned above—first direction F1, second direction F2, and third direction F3—are perpendicular to each other, facilitating the use of most square-shaped cell structures. Alternatively, as... Figures 1 to 9As shown, the first direction F1 can be the length direction of the battery cell, the second direction F2 can be the thickness direction of the battery cell, and the third direction F3 can be the width direction of the battery cell.

[0029] Preferably, such as Figures 1 to 3 As shown, the main body 10 of the battery cell may further include an electrode assembly disposed inside the casing. The casing may be a conductive casing. The first polarity component of the electrode assembly is electrically connected to the terminal post 11, and the second polarity component of the electrode assembly is electrically connected to the casing. The battery protection board is electrically connected to both the casing and the terminal post 11. Thus, by electrically connecting the second polarity component of the electrode assembly to the conductive casing, and simultaneously connecting the battery protection board to both the casing and the terminal post 11, the current conduction path is effectively simplified, the number of intermediate connectors (e.g., the negative terminal post 11) is reduced, contact resistance and circuit loss are decreased, and the charging and discharging efficiency of the battery cell is effectively improved. On the other hand, the conductive casing participates in the electrical connection, eliminating the need for additional conductive components connected to the second polarity component of the electrode assembly. This fully utilizes the space and material properties of the casing, further optimizes the internal space layout of the battery cell, further improves the space utilization rate of the battery cell, and creates conditions for achieving higher energy density.

[0030] It should be noted that the aforementioned conductive housing can be a steel housing, an aluminum housing, or a housing made of other conductive metals.

[0031] Preferably, such as Figures 1 to 3 As shown, the battery cell may further include a first connector 131, which may be disposed on the mounting end face 103. The first connector 131 connects the mounting end face 103 and the battery protection board to realize the electrical connection between the second polarity component of the battery cell body and the battery protection board.

[0032] Preferably, such as Figures 1 to 3 As shown, the battery cell may also include a second connector 132, which may be disposed on the side of the battery protection board facing the mounting end face 103. The second connector 132 connects the terminal post 11 and the battery protection board to realize the electrical connection between the first polarity component of the battery cell body and the battery protection board.

[0033] Preferably, such as Figure 1 and Figure 3 As shown, the battery cell may also include an insulating pad 14, which is disposed between the mounting end face 103 and the second connector 132 to achieve insulation between the second connector 132 and the housing.

[0034] Optionally, not shown in the figure, the surface of the insulating pad 14 may be coated with an adhesive layer, and the second connector 132 may be bonded and fixed to the mounting end face 103 via the insulating pad 14 to ensure the fixation stability of the second connector 132.

[0035] Preferably, such as Figures 1 to 3 As shown, the aforementioned terminal post 11 can be disposed at one end of the aforementioned mounting end face 103 in the third direction F3, so that the mounting end face 103 can have more space to accommodate the aforementioned battery protection board.

[0036] Preferably, such as Figures 1 to 3 As shown, the battery protection board may include a rigid board 121 (i.e., a printed circuit board, or PCB) and a flexible board 122 (i.e., a flexible printed circuit board, or FPC). The rigid board 121 can extend along a third direction F3. The rigid board 121 and the terminal post 11 are arranged side by side along the third direction F3. The flexible board 122 is disposed at the end of the rigid board 121 away from the terminal post 11 to avoid interference between the terminal post 11 and the flexible board 122, thus ensuring the safety and stability of the cell connection.

[0037] Preferably, such as Figures 1 to 3 As shown, a flange edge 104 may be provided on the edge of one side wall of the shell in the second direction F2. In other words, the area of ​​one of the two side walls of the shell that are opposite each other in the second direction F2 is larger than the area of ​​the other, so that when the two side walls of the shell that are opposite each other in the second direction F2 are joined, the one with the larger area forms the flange edge 104 at the joint, so as to facilitate the jointing of the shell.

[0038] Preferably, such as Figure 2 and Figure 3 As shown, on the side where the mounting end face 103 of the battery cell is located, the flange edge 104 extends beyond the mounting end face 103 by a predetermined distance along the first direction F1.

[0039] Furthermore, such as Figures 1 to 3 As shown, the flange edge 104 can be arranged around the shell.

[0040] Preferably, such as Figure 3 As shown, the battery cell may also include an adhesive 15, which includes a first adhesive portion 151 and a second adhesive portion 152 connected to each other. The first adhesive portion 151 bonds the battery protection plate and the mounting end face 103, and the second adhesive portion 152 bonds the battery protection plate and the flange edge 104 to improve the stability of the fixed connection between the battery protection plate and the battery cell body.

[0041] Preferably, the adhesive 15 can be double-sided adhesive.

[0042] Optionally, the insulating pad 14 can be disposed between the first adhesive portion 151 and the battery protection plate to fix the insulating pad 14 through the first adhesive portion 151.

[0043] Preferably, such as Figure 1 and Figure 2 As shown, at least a portion of the flexible board 122 can be disposed on the side of the rigid board 121 facing the mounting end face 103, and the rigid board 121 can be electrically connected to the flexible board 122 via the at least portion, thereby ensuring the connection stability between the flexible board 122 and the rigid board 121.

[0044] Preferably, such as Figure 1 and Figure 2 As shown, the battery cell may also include insulating tape 16, which can cover the outer side of both the rigid plate 121 and the terminal post 11, and the two ends of the insulating tape 16 are respectively attached to the two opposite sidewalls of the shell in the second direction F2 to ensure the insulation and safety of the battery cell ends.

[0045] Optionally, such as Figure 1 and Figure 2 As shown, another part of the flexible circuit board 122 can be led out from the side of the insulating tape 16 away from the pole post 11 on the third direction F3, so that the battery cell can be connected to the outside via the flexible circuit board 122.

[0046] Optionally, such as Figure 1 and Figure 10 As shown, the battery cell may also include an adhesive backing 17, which may be disposed on the side of the battery cell having a flange edge 104, so as to fix the battery cell to the housing of the electrical device through the adhesive backing 17.

[0047] See Figure 1 , Figures 8 to 10 The second aspect of this application also provides a foldable battery, including a hinge assembly 2 and at least two cells as described in any of the above embodiments, thus possessing all the beneficial technical effects of the cell, which will not be repeated here.

[0048] Specifically, at least two battery cells are arranged side-by-side along a third direction F3, with adjacent cells hinged together via a hinge assembly 2. This allows the battery to be flipped and folded directly, enabling its application in foldable phones, tablets, or other bending devices. Taking a foldable phone as an example, the battery can be directly flipped and folded, effectively avoiding the need for additional flip support structures (such as a battery flip frame). This simplifies the device's structure and avoids the space occupied by additional flip support structures. The foldable battery can be housed entirely within the device's casing. As long as the casing remains airtight, problems such as dust or foreign objects entering the flip support structure can be avoided, preventing malfunctions in the flipping mechanism and improving the folding performance of the phone.

[0049] like Figures 8 to 10 As shown in the figure, the foldable battery includes an example of two of the aforementioned battery cells. However, it is not limited to this example, and the number of battery cells and the number of hinge components 2 can be adaptively adjusted according to the folding requirements and power consumption needs of the power-consuming device. The structure of the battery will be described in detail below using a foldable battery including two of the aforementioned battery cells as an example.

[0050] For ease of description, such as Figure 1 , Figures 8 to 10 One of the two battery cells is defined as the first battery cell 101, and the other of the two battery cells is defined as the second battery cell 102.

[0051] Preferably, such as Figures 4 to 10 As shown, the hinge assembly 2 may include a first hinge frame 21, a first hinge shaft 24, a second hinge frame 22, a second hinge shaft 25, and a hinge base 23. The aforementioned hinge is used to fix the first battery cell 101, and the aforementioned second hinge 22 is used to fix the second battery cell 102. The aforementioned first hinge 21 and second hinge 22 are respectively disposed on both sides of the aforementioned hinge seat 23 in the third direction F3. The aforementioned first hinge shaft 24 passes through the first hinge 21 and the hinge seat 23 in the first direction F1 to realize the hinge between the first hinge 21 and the hinge seat 23. The aforementioned second hinge shaft 25 passes through the second hinge and the hinge seat 23 in the first direction F1 to realize the hinge between the second hinge 22 and the hinge seat 23. In this way, by hinged to the first hinge 21 and the second hinge respectively by the hinge seat 23, the hinge position of the first battery cell 101 and the hinge seat 23 and the hinge position of the second battery cell 102 and the hinge seat are effectively separated in the third direction F3. Thus, when the battery is in a folded state, the hinge structure can effectively adapt to the thickness of the battery cell, ensure the battery folding is in place and avoid interference between the battery cells during the folding process, thus preventing damage to the battery cells.

[0052] Preferably, such as Figures 4 to 7 As shown, the aforementioned hinge seat 23 may include a first connecting portion 230 and a first hinge protrusion 231. The first connecting portion 230 may extend along a first direction F1. A plurality of first hinge protrusions 231 are fixed on the side of the first connecting portion 230 near the first cell 101. The plurality of first hinge protrusions 231 are spaced apart along the first direction F1 to form a first groove between two adjacent first hinge protrusions 231.

[0053] Correspondingly, such as Figures 4 to 7 As shown, the first hinge 21 may include a second connecting portion 211 and a plurality of third hinge protrusions 212. The second connecting portion 211 extends along a first direction F1 to fit against the side wall of the first battery cell 101 on the side closer to the second battery cell 102 in a third direction F3. The plurality of third hinge protrusions 212 are fixed at intervals along the first direction F1 on the side of the second connecting portion 211 facing the hinge seat 23. The third hinge protrusions 212 are disposed in a first groove. The first hinge shaft 24 passes through the first hinge protrusion 231 and the third hinge protrusions 212 along the first direction F1 to ensure the hinge stability between the first battery cell 101 and the hinge seat 23.

[0054] Preferably, such as Figures 4 to 7 As shown, in the first direction F1, the size of the first hinge protrusion 231 is exactly equal to the size of the first groove. This effectively prevents the first cell 101 from moving relative to the hinge seat 23 in the first direction F1, and further improves the hinge stability between the first cell 101 and the hinge seat 23.

[0055] Similarly, such as Figures 4 to 7 As shown, the hinge seat 23 may also include a second hinge protrusion 232. A plurality of second hinge protrusions 232 are fixed on the side of the first connecting portion 230 near the second cell 102. The plurality of second hinge protrusions 232 are spaced apart along the first direction F1 to form a second groove between two adjacent second hinge protrusions 232.

[0056] Correspondingly, such as Figures 4 to 7 As shown, the second hinge 22 includes a third connecting portion 221 and a plurality of fourth hinge protrusions 222. The third connecting portion 221 extends along the first direction F1, and the plurality of fourth hinge protrusions 222 are fixed at intervals along the first direction F1 on the side of the third connecting portion 221 facing the hinge seat 23. The fourth hinge protrusions 222 are disposed in the second groove, and the second hinge shaft 25 passes through the second hinge protrusion 232 and the fourth hinge protrusions 222 along the first direction F1 to ensure the hinge stability between the second battery cell 102 and the hinge seat 23.

[0057] Similarly, such as Figures 4 to 7As shown, in the first direction F1, the size of the second hinge protrusion 232 is exactly equal to the size of the second groove. This effectively prevents the second cell 102 from moving relative to the hinge seat 23 in the first direction F1, and further improves the hinge stability between the second cell 102 and the hinge seat 23.

[0058] Preferably, such as Figures 4 to 7 As shown, the first hinge protrusion 231 and the second hinge protrusion 232 are aligned with each other in the first direction F1 to balance the force on the hinge seat 23, reduce the stress concentration of the hinge seat 23, ensure the stability of the hinge seat 23, and extend the service life of the hinge seat 23.

[0059] like Figure 1 and Figures 4 to 10 As shown in the figure, an example is shown where the number of the first hinge protrusion 231 and the second hinge protrusion 232 is 6 each. Correspondingly, the number of the third hinge protrusion 212 and the fourth hinge protrusion 222 is 7 each. However, this is not the only limitation. The number of the first hinge protrusion 231, the second hinge protrusion 232, the third hinge protrusion 212, and the fourth hinge protrusion 222 can be adaptively adjusted according to the size of the battery cell in the first direction F1 and the size of the first hinge protrusion 231, the second hinge protrusion 232, the third hinge protrusion 212, and the fourth hinge protrusion 222. For example, the number of the first hinge protrusion 231 and the second hinge protrusion 232 can also be 1, 2, 3, 4, 5, 7, 8, 9...n (where n is a positive integer). Correspondingly, the number of the third hinge protrusion 212 and the fourth hinge protrusion 222 can be 2, 3, 4, 5, 7, 8, 9, 10...(n+1).

[0060] Preferably, such as Figure 8 and Figure 9 As shown, the first battery cell 101 can rotate relative to the second battery cell 102 at an angle of 0° (folded state) to 180° (unfolded state) to accommodate the folding screen structure of most electrical devices. In other words, the hinge assembly 2 can also be provided with a limiting structure to limit the movement between the first battery cell 101 and the second battery cell 102 when the rotation angle of the first battery cell 101 relative to the second battery cell 102 reaches 180°, thus preventing excessive rotation angles that could damage other structures of the electrical device. Examples of two different limiting structures are provided below, with detailed descriptions of the structure of the hinge assembly 2: Example 1, such as Figure 4 and Figure 5As shown, the first connecting portion 230 can be a sheet-like member extending along the first direction F1, and this sheet-like member can be perpendicular to the aforementioned third direction F3. Both the third hinge protrusion 212 and the fourth hinge protrusion 222 are limiting protrusions 20. Wherein, as... Figure 4 As shown, the limiting protrusion 20 is formed by three sides connected in sequence: a first side 201, a second side 202, and a third side 203. The first side 201 and the third side 203 are parallel to each other and face each other. The first side 201 and the second side 202 are curved, and the second side 202 and the third side 203 are right-angled. Thus, through the abutment and limiting effect between the second side 202, the third side 203 and the first connecting part 230, the limiting protrusion 20 can enable the first side 201 to rotate towards the side closer to the first connecting part 230 and restrict the third side 203 from rotating towards the side closer to the first connecting part 230. This effectively enables the first battery cell 101 to rotate at an angle of 0° to 180° relative to the second battery cell 102.

[0061] Example 2, such as Figure 6 and Figure 7 As shown, the first connecting portion 230 includes a connecting piece 2301 and a baffle 2302 that both extend along the first direction F1 and are perpendicular to each other. The baffle 2302 is fixedly connected to one end of the connecting piece 2301. The side of the third hinge protrusion 212 away from the second connecting portion 211 and the side of the fourth hinge protrusion 222 away from the third connecting portion 221 are both semi-cylindrical surfaces. Thus, by limiting the baffle 2302, the first battery cell 101 can be rotated at an angle of 0° to 180° relative to the second battery cell 102.

[0062] The third aspect of this application also provides an electrical device that includes the battery cell described in any of the above embodiments, or includes the foldable battery described in any of the above embodiments, and thus has all the beneficial technical effects of the battery cell, which will not be repeated here.

[0063] Preferably, the electrical device may further include a housing, in which the battery cell or battery may be sealed.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electric cell, with a length direction as a first direction, with a thickness direction as a second direction, and with a width direction as a third direction, characterized in that, The battery cell comprises a battery cell body and a battery protection plate, the battery cell body comprises a shell part and a pole, the pole is fixed on a placement end face of the shell part in a first direction, and the pole protrudes relative to the placement end face; The battery protection plate is fixed on the placement end face and is arranged side by side with the pole in the third direction.

2. The electric cell of claim 1, wherein, The battery cell body further comprises a pole group arranged inside the shell part, the shell part is a conductive shell, a first polarity component of the pole group is electrically connected with the pole, and a second polarity component of the pole group is electrically connected with the shell part; The battery protection plate is electrically connected with the shell part and the pole respectively.

3. The electric cell of claim 2, wherein, Further comprising: A first connecting piece arranged on the placement end face, and the first connecting piece connects the placement end face and the battery protection plate; A second connecting piece arranged on a side of the battery protection plate facing the placement end face, and the second connecting piece connects the pole and the battery protection plate; An insulating gasket arranged between the placement end face and the second connecting piece.

4. The battery cell according to claim 1, wherein A side of the pole close to the placement end face is arranged with a boundary; The battery protection plate comprises a hard plate and a soft plate, the hard plate is arranged side by side with the pole, and the soft plate is arranged at an end of the hard plate away from the pole.

5. The electric cell of claim 4, wherein, An edge of a side wall of a side of the shell part in a second direction is arranged with a flange edge, and the flange edge exceeds the placement end face by a predetermined distance along the first direction on a side of the placement end face of the battery cell; Further comprising a bonding piece comprising a first bonding part and a second bonding part connected with each other, the first bonding part bonds the battery protection plate and the placement end face, and the second bonding part bonds the battery protection plate and the flange edge.

6. A foldable battery, characterized by, Comprise a hinged assembly and at least two battery cells according to any one of claims 1 to 5; At least two battery cells are arranged side by side along a third direction, and adjacent two battery cells are hinged via the hinged assembly.

7. The foldable battery according to claim 6, wherein Adjacent two battery cells are defined as a first battery cell and a second battery cell respectively; The hinged assembly comprises a first hinged bracket, a first hinged shaft, a second hinged bracket, a second hinged shaft and a hinged seat; The first hinged bracket is fixedly connected with the first battery cell, the second hinged bracket is fixedly connected with the second battery cell, the first hinged bracket and the second hinged bracket are arranged on two sides of the hinged seat respectively, the first hinged shaft penetrates through the first hinged bracket and the hinged seat along the first direction, and the second hinged shaft penetrates through the second hinged bracket and the hinged seat along the first direction.

8. The foldable battery of claim 7, wherein, The hinged seat comprises a first connecting part, a first hinged protrusion and a second hinged protrusion, and the first connecting part extends along the first direction; A plurality of first hinged protrusions are fixed on a side of the first connecting part close to the first battery cell, and the plurality of first hinged protrusions are arranged at intervals along the first direction to form a first slot between adjacent two first hinged protrusions. The first hinge frame comprises a second connecting portion extending along the first direction and a plurality of third hinge protrusions fixed to a side of the second connecting portion facing the hinge seat along the first direction, the third hinge protrusions being arranged in the first embedding groove, and the first hinge shaft penetrating the first hinge protrusions and the third hinge protrusions along the first direction; The side of the first connecting portion close to the second battery cell is fixed with a plurality of second hinge protrusions arranged along the first direction to form a second embedding groove between two adjacent second hinge protrusions; The second hinge frame comprises a third connecting portion extending along the first direction and a plurality of fourth hinge protrusions fixed to a side of the third connecting portion facing the hinge seat along the first direction, the fourth hinge protrusions being arranged in the second embedding groove, and the second hinge shaft penetrating the second hinge protrusions and the fourth hinge protrusions along the first direction.

9. The foldable battery according to claim 8, wherein The first connecting portion comprises a connecting piece and a blocking piece extending along the first direction and perpendicular to each other, the blocking piece being fixedly connected to one end of the connecting piece, and the side of the third hinge protrusion away from the second connecting portion and the side of the fourth hinge protrusion away from the third connecting portion are both semicylindrical surfaces; Alternatively, the first connecting portion is a sheet-shaped member extending along the first direction, the third hinge protrusion and the fourth hinge protrusion are both limiting protrusions formed by a first side, a second side and a third side connected in sequence, the first side and the third side being parallel to and opposite to each other, wherein the first side and the second side are both arc transition, and the second side and the third side are both right angle transition.

10. An electric device, comprising the battery cell according to any one of claims 1 to 5, or the foldable battery according to any one of claims 6 to 9. ​ ​

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