Battery cell structure, battery assembly and electronic equipment

Abstract

The embodiment of the utility model provides a battery cell structure, a battery assembly and electronic equipment. The battery cell structure comprises a battery cell body, a top sealing edge, a tab and a tab sealing element, the top sealing edge is connected to the end part of the battery cell body and extends out along a first direction, the tab is connected to the top sealing edge, and the tab sealing element is close to the top sealing edge and is connected to the tab; a gap is formed between the top sealing edge and the tab sealing element and / or the tab, the gap is formed in the tab sealing element, or the gap extends to the tab from the tab sealing element, so that the tab is bent along the direction opposite to the first direction through the gap. Therefore, the tabs can be extremely bent through the notches, so that the protection plate structure can be conveniently placed on the side surface of the top sealing edge, the setting height of the protection plate structure is reduced, the occupation of the capacity of the battery cell body is reduced, and the energy density of the battery cell is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery cell structure, a battery assembly and an electronic device. BACKGROUND

[0002] The battery assembly usually comprises a battery cell and a protection plate structure, the protection plate structure is connected to the battery cell and is used for monitoring and protecting the charging and discharging process of the battery cell, and has an important safety guarantee function for the electronic device.

[0003] In the prior art, the top end of the battery cell is provided with a top sealing edge, the tab of the battery cell extends from the top sealing edge, and the protection plate structure is laser welded at the top end of the tab to realize the connection between the battery cell and the protection plate structure. However, the protection plate structure is connected to the top end of the tab, so that the height of the top end of the battery assembly is high, the capacity space of the battery cell is occupied, and the energy density of the battery cell is limited. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the utility model is provided to overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the application is implemented as follows:

[0006] In a first aspect, the embodiments of the application provide a battery cell structure, which comprises: a battery cell body, a top sealing edge, a tab and a tab sealing piece.

[0007] The top sealing edge is connected to the end of the battery cell body and extends in a first direction, the tab is connected to the top sealing edge, and the tab sealing piece is connected to the tab close to the top sealing edge.

[0008] A notch is arranged between the top sealing edge and the tab sealing piece and / or the tab, the notch is arranged in the tab sealing piece, or the notch extends from the tab sealing piece to the tab, so that the tab is bent in a direction opposite to the first direction through the notch.

[0009] Optionally, a first size of the notch in the first direction is A, and a second size of the notch in a second direction is C, the second direction being perpendicular to the first direction.

[0010] The ratio of the second size C to the first size A satisfies: 3≤C / A≤12.

[0011] Optionally, the first size A is any value in the range of 0.05-2mm.

[0012] Optionally, the second size C is any value in the range of 1.5-6mm.

[0013] Optionally, the distance between the notch and the edge of the tab is any value in the range of 0-2mm in the second direction.

[0014] In a second aspect, the embodiments of the present application further provide a battery assembly, which comprises a protection plate structure and the cell structure.

[0015] The end of the cell body of the cell structure and the top sealing edge form a receiving groove, the protection plate structure is arranged in the receiving groove, and the protection plate structure is connected to the tab of the cell structure.

[0016] Optionally, the protection plate structure comprises a circuit board body, components and a connecting piece.

[0017] The circuit board body comprises a first surface and a second surface adjacent to the first surface, the components are connected to the first surface, and the connecting piece is connected to the second surface.

[0018] Optionally, the connecting piece is connected to the second surface and extends to the edge of the first surface.

[0019] Optionally, the protection plate structure comprises a circuit board body, components and a connecting piece.

[0020] The circuit board body comprises a first surface and a third surface, the third surface is arranged away from the first surface, the components are connected to the first surface, and the connecting piece is connected to the third surface.

[0021] The tab is provided with an extension part, the extension part extends towards a second direction, and the connecting piece is connected to the extension part, wherein the second direction is perpendicular to the first direction.

[0022] Optionally, the connecting piece is a U-shaped connecting piece, the U-shaped connecting piece is provided with a connecting groove, and the extension part extends into the connecting groove and is connected to the inner wall of the connecting groove.

[0023] Optionally, the battery assembly further comprises a first packaging piece, the first packaging piece is connected to the circuit board body and covers the components, so as to package the protection plate structure, and the connecting piece is exposed to the first packaging piece.

[0024] Optionally, the battery assembly further comprises a second packaging piece, the second packaging piece is connected to the end of the cell body, and the second packaging piece covers the circuit board body, the first packaging piece, the connecting piece, the tab and the top sealing edge.

[0025] Optionally, the battery assembly further comprises a third encapsulation connected to the end of the cell body, and the third encapsulation encapsulates the circuit board body, the components, the connecting piece, the tab and the top sealing edge.

[0026] In a third aspect, the embodiments of the present application provide an electronic device, which comprises the battery assembly or the cell structure.

[0027] In the embodiments of the present application, the cell structure comprises a cell body, a top sealing edge, a tab and a tab sealing piece; the top sealing edge is connected to the end of the cell body and extends in a first direction, the tab is connected to the top sealing edge, and the tab sealing piece is connected to the tab close to the top sealing edge; a gap is arranged between the top sealing edge and the tab sealing piece and / or the tab, and the gap is arranged in the tab sealing piece or extends from the tab sealing piece to the tab, so that the tab is bent in a direction opposite to the first direction through the gap. In this way, the tab can be bent and folded in the first direction through the gap between the top sealing edge and the tab sealing piece, or the gap between the top sealing edge, the tab sealing piece and the tab, or the gap between the top sealing edge and the tab, so that the tab can be attached to the side wall of the top sealing edge, the protective plate structure can be placed on the side of the top sealing edge, the setting height of the protective plate structure is reduced, the capacity of the cell body is reduced, and the energy density of the cell structure is improved. The height of the top end of the battery structure is reduced by connecting the protective plate structure to the top end of the tab, the capacity space of the cell body is reduced, and the energy density of the cell structure is improved.

[0028] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a partial enlarged schematic view of a cell structure according to an embodiment of the present application;

[0031] Figure 2 is a structural schematic view of a battery assembly according to an embodiment of the present application;

[0032] Figure 3 is an exploded view of a battery assembly according to an embodiment of the present application;

[0033] Figure 4This is a partial structural schematic diagram of a battery assembly according to an embodiment of this application;

[0034] Figure 5 This is an enlarged schematic diagram of a protection board structure for a battery assembly as described in an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the structure of a first package of a battery assembly according to an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the structure of a second package of a battery assembly according to an embodiment of this application;

[0037] Figure 8 This is a schematic diagram of the structure of a third package of a battery assembly according to an embodiment of this application;

[0038] Figure 9 This is a schematic diagram of another part of the structure of a battery assembly described in an embodiment of this application;

[0039] Figure 10 This is a schematic diagram of the structure of another first package of a battery assembly according to an embodiment of this application;

[0040] Figure 11 This is a schematic diagram of the structure of another second package of a battery assembly according to an embodiment of this application;

[0041] Figure 12 This is a schematic diagram of the structure of another third package of a battery assembly according to an embodiment of this application;

[0042] Reference numerals: 10 – Cell structure; 20 – Protection board structure; 11 – Cell body; 12 – Top seal; 13 – Tab; 14 – Receiving groove; 21 – Circuit board body; 22 – Component; 23 – Connector; 24 – First side; 25 – Second side; 26 – Third side; 15 – Extension; 27 – U-shaped connecting piece; 28 – Connecting groove; 30 – First package; 40 – Second package; 50 – Third package; 16 – Tab seal; 17 – Notch; Y – First direction; X – Second direction. Detailed Implementation

[0043] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0044] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0045] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Referring to Figures 1 to 12This illustration shows a schematic diagram of a battery cell structure 10 applied to a battery assembly according to an embodiment of this application. The battery cell structure 10 includes: a battery cell body 11, a top sealing edge 12, a tab 13, and a tab sealing member 16; the top sealing edge 12 is connected to the end of the battery cell body 11 and extends along a first direction Y, the tab 13 is connected to the top sealing edge 12, and the tab sealing member 16 is connected to the tab 13 near the top sealing edge 12; a notch 17 is provided between the top sealing edge 12 and the tab sealing member 16 and / or the tab 13, the notch 17 is opened in the tab sealing member 16, or the notch 17 extends from the tab sealing member 16 to the tab 13, so that the tab 13 bends in a direction opposite to the first direction Y through the notch 17.

[0048] In this embodiment, the tab 13 can be bent and folded to a relatively extreme degree in the first direction Y through the gap 17 between the top sealing edge 12 and the tab seal 16, or the gap 17 between the top sealing edge 12 and the tab 13, or the gap 17 between the top sealing edge 12, the tab seal 16, and the tab 13. This allows the tab 13 to adhere to the side wall of the top sealing edge 12, facilitating the placement of the protection plate structure 20 on the side of the top sealing edge 12. This reduces the height of the protection plate structure 20, decreases the capacity occupied by the cell body 11, and increases the energy density of the cell structure 10. It also avoids connecting the protection plate structure 20 to the top of the tab 13, which would result in a high top height of the battery structure, reducing the capacity space occupied by the cell body 11 and increasing the energy density of the cell structure 10.

[0049] For example, in the embodiments of this application, such as Figure 1 As shown, the notch 17 can be symmetrically arranged on both sides of the tab seal 16, or the notch 17 can be asymmetrically arranged. The specific arrangement of the notch 17 is not limited in this embodiment. Furthermore, the notch 17 can be provided with a first side extending horizontally and a second side extending vertically, forming a rectangular notch 17. In addition, the notch 17 can also be circular or elliptical, etc. The specific shape of the notch 17 is not limited in this embodiment.

[0050] In this embodiment, for example, the tab seal 16 can be tab adhesive, used to seal the connection between the tab 13 and the top sealing edge 12, so that the cell structure 10 has better electrical performance. Alternatively, the tab seal 16 can also be made of structural adhesive or other materials; this embodiment does not limit the specific type of tab seal 16.

[0051] Optionally, in the embodiment of the present application, the first size A of the notch 17 along the first direction Y is A, and the second size C of the notch 17 along the second direction X perpendicular to the first direction Y is C, and the ratio of the second size C to the first size A satisfies 3≤C / A≤12. In this way, the notch 17 has a sufficient length and a suitable width, and the folding function of the tab 13 is better and has better sealing performance.

[0052] For example, in the embodiment of the present application, the ratio C / A of the second size C to the first size A can be 1:3 or 1:5 or 1:12, etc. For example, when the second size C is 6 mm, the first size A can be 2 mm, 1.5 mm, 1 mm or 0.05 mm, etc. The specific value of the first size A and the second size C is not limited in the embodiment of the present application.

[0053] Optionally, in the embodiment of the present application, the first size A is any value in 0.05-2 mm. The first size A of the notch 17 along the first direction Y can be 0.05 mm, 1 mm or 1.5 mm or 2 mm, etc. to adapt to the size of the ordinary battery structure 10 and the tab 13, so that the notch 17 has a suitable width and structural strength. The specific value of the first size A is not limited in the embodiment of the present application, and can be set according to the actual folding needs and stress conditions, etc.

[0054] In the embodiment of the present application, optionally, the second size C is any value in 1.5-6 mm. The second size C of the notch 17 along the second direction X can be 1.5 mm, 2 mm or 3 mm or 6 mm, etc. to adapt to the size of the ordinary battery structure 10 and the tab 13, so that the notch 17 has a suitable length and structural strength. The specific value of the second size C is not limited in the embodiment of the present application, and can be set according to the actual folding needs and stress conditions, etc.

[0055] Optionally, along the second direction X, the distance between the notch 17 and the edge of the tab 13 is any value in 0-2 mm. As shown in the figure, that is, the distance B is any value in 0-2 mm, for example, 1 mm, 1.5 mm or 2 mm, etc. which can be set according to actual needs. In this way, in the case of setting the notch 17 on the tab seal 16, the influence of the rigidity and structural performance of the tab 13 during the opening and folding process is reduced, so that the tab 13 has better structural strength. Figure 1

[0056] In summary, the battery structure in the embodiment of the present application can at least have the following advantages:

[0057] ​In the embodiment of the present application, the cell structure comprises: a cell body, a top sealing edge, a tab, and a tab sealing piece; the top sealing edge is connected to the end of the cell body and extends in a first direction, the tab is connected to the top sealing edge, and the tab sealing piece is connected to the tab near the top sealing edge; a gap is provided between the top sealing edge and the tab sealing piece and / or the tab, the gap is formed in the tab sealing piece, or the gap extends from the tab sealing piece to the tab, so that the tab is bent in a direction opposite to the first direction through the gap. In this way, the tab can pass through the gap between the top sealing edge and the tab sealing piece, or the gap between the top sealing edge, the tab sealing piece and the tab, or the gap between the top sealing edge and the tab, so that the tab can be bent and folded in the first direction to the extreme, and then the tab can be attached to the side wall of the top sealing edge, which facilitates the placement of the protection plate structure on the side of the top sealing edge, reduces the setting height of the protection plate structure, reduces the occupation of the capacity of the cell body, and improves the energy density of the cell structure. Avoiding connecting the protection plate structure to the top end of the tab makes the height of the top end of the battery structure higher, reduces the occupation of the capacity space of the cell body, and improves the energy density of the cell structure.

[0058] The embodiment of the present application also provides a battery assembly, which can specifically comprise: a cell structure 10 and a protection plate structure 20; an accommodation groove 14 is formed between the end of a cell body 11 of the cell structure 10 and a top sealing edge 12, the protection plate structure 20 is arranged in the accommodation groove 14, and the protection plate structure 20 is connected to a tab 13, wherein the first direction Y can also be the length direction of the cell structure 10.

[0059] In the embodiment of the present application, the top sealing edge 12 is connected to the end of the cell body 11 and extends in the first direction Y, that is, the length direction of the cell structure 10, that is, the top sealing edge 12 is not bent, the tab 13 is bent in a direction opposite to the first direction Y, so that the tab 13 extends in the first direction Y after being bent. Since the top sealing edge 12 extends in the first direction Y at the end of the cell body 11, an accommodation groove 14 is formed between the end of the cell body 11 and the top sealing edge 12, so that the protection plate structure 20 is provided with a setting space through the accommodation groove 14, and the protection plate structure 20 is connected to the tab 13 of the top sealing edge 12. In this way, the protection plate structure 20 does not need to be connected to the top end of the tab 13, so that the thickness of the top end of the cell structure 10 is large, the setting height of the protection plate structure 20 is reduced, the occupation of the capacity of the cell body 11 is reduced, the capacity of the cell structure 10 is increased, and the energy density of the cell structure 10 is improved.

[0060] According to simulation tests, in the related art, the top sealing edge 12 of the battery cell structure 10 is bent, and the protection plate structure 20 is connected to the top end of the tab 13, so that the connecting piece 23 of the protection plate structure 20 occupies a space of 0.24-0.3 mm in the length direction of the battery cell structure 10 in the first direction Y. In the battery assembly of the embodiment of the present application, the top sealing edge 12 of the battery cell structure 10 is not bent, so that the protection plate structure 20 is arranged in the accommodating groove 14 between the end of the battery cell body 11 and the top sealing edge 12, the protection plate structure 20 is connected to the tab 13, the size of the battery assembly in the length direction of the battery cell structure 10 is reduced, the setting height of the protection plate structure 20 is reduced, the finished battery product can be shortened by 0.2-0.6 mm, and the capacity of the battery cell body 11 is reduced, which provides space for capacity increase of the battery cell structure 10.

[0061] For example, in the embodiment of the present application, the battery cell structure 10 can be a lithium ion battery cell, a polymer lithium battery cell, or a lithium iron phosphate battery cell, etc., which can be set according to actual needs, and the specific type of the battery cell structure 10 is not limited in the embodiment of the present application.

[0062] Optionally, in the embodiment of the present application, as shown in Figure 4 and Figure 5 The protection plate structure 20 includes a circuit board body 21, a component 22, and a connecting piece 23. The circuit board body 21 includes a first surface 24 and a second surface 25 adjacent to the first surface 24, the component 22 is connected to the first surface 24, and the connecting piece 23 is connected to the second surface 25. The connecting piece 23 is connected to the tab 13. Generally, the first surface 24 can be the front surface of the circuit board body 21 and has a larger area, and the second surface 25 can be the side surface of the circuit board body 21. The component 22 is arranged on the first surface 24 of the circuit board body 21, and the connecting piece 23 is arranged on the second surface 25 of the circuit board body 21. In this way, the component 22 and the connecting piece 23 are not arranged on the first surface 24 of the circuit board body 21 as in the related art, so that the component 22 has a larger arrangement area on the first surface 24 of the circuit board body 21, and in the case that the number of components 22 is large, the connecting piece 23 does not occupy the area of the first surface 24, and the component 22 does not need to be arranged on the back surface of the circuit board body 21.

[0063] In addition, in the case of applying the protection plate structure 20 to multiple battery cell structures 10, in order to make the multiple battery cell structures 10 and the protection plate structure 20 have better connection reliability and stability, the number of connecting pieces 23 is generally set to be multiple. Compared with the case of arranging the connecting piece 23 on the first surface 24 of the circuit board body 21 in the related art, the connecting piece 23 is arranged on the second surface 25 of the circuit board body 21 in the present application, which further increases the arrangement area of the component 22 on the first surface 24, and the component 22 does not need to be arranged on the back surface of the circuit board body 21.

[0064] For example, in this embodiment of the application, the tab 13 can be connected to the connector 23 of the protection plate structure 20 by laser welding, which is a commonly used connection method with a mature process, resulting in good connection reliability and stability between the cell structure 10 and the protection plate structure 20.

[0065] In this embodiment of the application, for example, in order to provide a suitable welding area between the tab 13 and the connector 23, the connector 23 can be configured as a brick-shaped connector block. For example, such as... Figure 5 As shown, the length L of the brick-shaped connecting block, i.e., the length along the first direction Y, can be set to any value between 0.6 and 3 mm. The thickness D of the brick-shaped connecting block, i.e., the length along the second direction X, can be set to any value between 0.2 and 1 mm to avoid puncturing the connecting piece 23 during spot welding.

[0066] In this embodiment, the connector 23 is used to connect the tab 13 of the cell structure 10. For example, the connector 23 can be a nickel block or a nickel sheet. In addition, the connector 23 can also be other metal materials that can be welded and other shapes, etc. The specific material of the connector 23 is not limited in this embodiment.

[0067] For example, in this embodiment of the application, the circuit board body 21 can be a PCB (Printed Circuit Board), also known as a rigid board, which has good structural strength. In addition, the protective board structure 20 may also include an FPC (Flexible Printed Circuit), also known as a flexible board, which is connected to the circuit board body 21 and is easy to bend according to assembly requirements.

[0068] In this embodiment of the application, for example, the number of components 22 can be multiple, and the types of components 22 can include primary ICs (integrated circuits), secondary ICs, transistors, precision resistors, etc., which can be set according to actual needs. This embodiment of the application does not limit the specific type of components 22.

[0069] Optionally, in this embodiment, the connector 23 is connected to the second surface 25 and extends to the edge of the first surface 24. This allows a portion of the connector 23 to extend to the edge of the first surface 24 of the circuit board body 21 where no component 22 is located, further enhancing the reliability and stability of the connection between the connector 23 and the circuit board body 21, while not affecting the placement of the component 22 on the first surface 24 of the circuit board body 21.

[0070] In some other alternative embodiments of this application, such asFigure 9 As shown, the protection board structure 20 includes: a circuit board body 21, components 22, and connectors 23. The circuit board body 21 includes a first surface 24 and a third surface 26, with the third surface 26 facing away from the first surface 24. Components 22 are connected to the first surface 24, and connectors 23 are connected to the third surface 26. The tab 13 has an extension 15 extending in a second direction X, and connectors 23 are connected to the extension 15, wherein the second direction X is perpendicular to the first direction Y. In this way, connectors 23 can be placed on the third surface 26 of the circuit board body 21 without affecting the position of components 22 on the first surface 24 of the circuit board body 21. Furthermore, the third surface 26 is located on the back side of the circuit board body 21 and has the same area as the first surface 24, giving connectors 23 a larger installation area and improving the connection reliability between connectors 23 and the circuit board body 21. And the extension 15 of the tab 13 is extended along the second direction X, such that the extension 15 extends to the position where the connector 23 is provided on the third surface 26 of the circuit board body 21, so as to realize the connection between the connector 23 and the tab 13.

[0071] Optionally, in this embodiment, the connector 23 is a U-shaped connecting piece 27. The U-shaped connecting piece 27 has a connecting groove 28, and the extension 15 extends into the connecting groove 28 and connects to the inner wall of the connecting groove 28. Thus, designing the connector 23 as a U-shaped connecting piece 27 allows for a relatively stable and reliable connection between the extension 15 of the electrode 13 and the connector 23 through the connecting groove 28 of the U-shaped connecting piece 27. Furthermore, using the U-shaped connecting piece 27 facilitates better connection reliability between the electrode 13 and the connector 23 during the welding process, avoiding problems such as breakdown or incomplete welding when the electrode 13 is welded to the connector 23.

[0072] Optionally, in this embodiment, the battery assembly further includes a first encapsulation component 30. The first encapsulation component 30 is connected to the circuit board body 21 and covers the components 22 to encapsulate the protection board structure 20. The connector 23 is exposed outside the first encapsulation component 30. Thus, by using the first encapsulation component 30 to perform injection molding encapsulation of the protection board structure 20, a PCM injection molding scheme is formed. This facilitates better protection of the protection board structure 20 after its fabrication, ensuring better reliability and stability, and preventing damage to components 22 and other structures during transportation and installation. Furthermore, exposing the connector 23 outside the first encapsulation component 30 facilitates welding the connector 23 to the tabs 13 of the cell structure 10 during subsequent assembly processes.

[0073] For example, such as Figure 6The diagram illustrates one embodiment of the first encapsulation 30, where the connector 23 is exposed on the second surface 25, i.e., the side surface, of the circuit board body 21. Optionally, the first encapsulation 30 can encapsulate the connector 23 extending to the first surface 24 of the circuit board body 21, thereby providing a better encapsulation effect on the first surface 24 where the component 22 is located. Alternatively, the first encapsulation 30 can be configured not to encapsulate the connector 23 extending to the first surface 24 of the circuit board body 21; this embodiment does not limit this approach.

[0074] In another alternative embodiment of this application, such as Figure 10 As shown, this is another configuration of the first package 30 in an embodiment of this application, wherein the connector 23 is exposed on the third side 26 of the circuit board body 21, that is, its back side.

[0075] For example, in this embodiment, the first encapsulation component 30 can be made of PUR (Polyurethane) and molded using UV curing. Alternatively, the first encapsulation component 30 can be made of PA (polyamide), commonly known as nylon, and molded using injection molding or 3D printing. Furthermore, the first encapsulation component 30 can also be made of EMC (Epoxy Molding Compound) and molded using injection molding, etc. This embodiment does not limit the specific material and process of the first encapsulation component 30.

[0076] Optionally, in this embodiment, the battery assembly further includes a second encapsulation component 40. The second encapsulation component 40 is connected to the end of the cell body 11 and covers the circuit board body 21, the first encapsulation component 30, the connector 23, the tab 13, and the top sealing edge 12. Thus, after the protection board structure 20 is connected to the tab 13 of the cell structure 10, the end of the cell structure 10 is injection molded using the second encapsulation component 40, forming a solution combining PCM injection molding and head injection molding of the cell structure 10. This provides better protection for the end of the cell structure 10, resulting in better reliability and stability. Further injection molding of the end of the cell structure 10, based on the injection molding encapsulation of the protection board structure 20, prevents damage to the connector 23, tab 13, and top sealing edge 12 during use or installation.

[0077] In the embodiments of this application, for example, such as Figure 7 As shown, this is one embodiment of the second encapsulation 40 configuration. In another optional embodiment of this application, as shown... Figure 11 As shown, this is another configuration scheme for the second package 40 in an embodiment of this application.

[0078] For example, in this embodiment, the second encapsulation component 40 can be made of PUR (Polyurethane) and molded using UV curing. Alternatively, the second encapsulation component 40 can be made of PA (polyamide), commonly known as nylon, and molded using injection molding or 3D printing. Furthermore, the second encapsulation component 40 can also be made of EMC (Epoxy Molding Compound) and molded using injection molding, etc. This embodiment does not limit the specific material and process of the second encapsulation component 40.

[0079] Optionally, in this embodiment, the battery assembly further includes a third encapsulation component 50. The third encapsulation component 50 is connected to the end of the cell body 11 and covers the circuit board body 21, components 22, connectors 23, tabs 13, and top sealing edge 12. In this way, the end of the cell structure 10 is directly injection molded using the third encapsulation component 50, forming a head injection molding solution for the cell structure 10. This provides better protection for the end of the cell structure 10, resulting in better reliability and stability. It also prevents damage to the circuit board body 21, components 22, connectors 23, tabs 13, and top sealing edge 12 during use or installation. This eliminates the need for prior injection molding of the protection board structure 20, reducing process steps.

[0080] In the embodiments of this application, for example, such as Figure 8 As shown, this is one embodiment of the third encapsulation component 50 configuration in this application. In another optional embodiment of this application, as shown... Figure 12 As shown, this is another configuration scheme for the third package 50 in an embodiment of this application.

[0081] In the embodiments of this application, a PCM injection molding packaging scheme, or a cell structure 10 head injection molding packaging scheme, or a combination of PCM injection molding packaging scheme and cell structure 10 head injection molding packaging scheme can be used. The scheme can be set according to actual needs, and the embodiments of this application do not limit it.

[0082] For example, in this embodiment, the third encapsulation component 50 can be made of PUR (Polyurethane) and molded using UV curing. Alternatively, the third encapsulation component 50 can be made of PA (polyamide), commonly known as nylon, and molded using injection molding or 3D printing. Furthermore, the third encapsulation component 50 can also be made of EMC (Epoxy Molding Compound) and molded using injection molding, etc. This embodiment does not limit the specific material and process of the third encapsulation component 50.

[0083] In this embodiment, the manufacturing process of the battery assembly can be as follows: First, a surface mount technology (SMT) is performed on the circuit board body 21 to connect components 22 and connectors 23 to the circuit board body 21, resulting in a protective board structure 20, i.e., a PCM. At this time, a first encapsulation component 30 can be provided on the protective board structure 20 to form a PCM injection molding solution. Then, the tab seal 16 of the cell structure 10 is bent and pre-cut to obtain a notch 17. The tab seal 16 is then bent through the notch 17, causing the tab 13 to bend in a direction opposite to the first direction Y. Next, the protective board structure 20 is placed in the receiving groove 14 formed between the end of the cell body 11 and the top sealing edge 12, and the nickel block or nickel sheet of the connector 23 is soldered to the tab 13 of the cell structure 10. Finally, injection molding is performed on the end of the cell structure 10 to form a second encapsulation component 40, constituting a head injection molding encapsulation solution for the cell structure 10. Alternatively, the first encapsulation component 30 can be omitted from the separate injection molding encapsulation of the PCM, and the head of the cell structure 10 can be directly injection molded using the third encapsulation component 50. This embodiment of the application is not limited to this approach. Finally, the cell structure 10 is wrapped with insulating tape for insulating encapsulation, thus obtaining the battery assembly.

[0084] In summary, the battery assembly described in the embodiments of this application may include at least the following advantages:

[0085] In this embodiment, the battery assembly includes a protection plate structure and the aforementioned cell structure; a receiving groove is formed between the end of the cell body of the cell structure and the top sealing edge, the protection plate structure is disposed within the receiving groove, and the protection plate structure is connected to the tab of the cell structure. The cell structure includes: a cell body, a top sealing edge, a tab, and a tab seal; the top sealing edge is connected to the end of the cell body and extends along a first direction, the tab is connected to the top sealing edge, and the tab seal is connected to the tab near the top sealing edge; a notch is provided between the top sealing edge and the tab seal and / or the tab, the notch being formed in the tab seal, or the notch extending from the tab seal to the tab, so that the tab bends through the notch in a direction opposite to the first direction. In this way, the tab can be bent and folded to a relatively extreme degree in the first direction through the gap between the top seal and the tab seal, or between the top seal and the tab and the tab, or between the top seal and the tab. This allows the tab to adhere to the side wall of the top seal, facilitating the placement of the protection plate structure on the side of the top seal. This reduces the height of the protection plate structure, decreases the capacity occupied by the cell body, and increases the energy density of the cell structure. It also avoids connecting the protection plate structure to the top of the tab, which would result in a high top height of the battery structure, further reducing the capacity space occupied by the cell body and increasing the energy density of the cell structure.

[0086] This application also proposes an electronic device, which includes the battery assembly or the cell structure described above.

[0087] In this embodiment of the application, the electronic device may include, but is not limited to, any one of mobile phones, tablets, wearable devices, or electric vehicles. This embodiment of the application does not limit the specific type of the electronic device.

[0088] The electronic device described in this application embodiment may include at least the following advantages:

[0089] In this embodiment, the electronic device includes the battery assembly, or the battery cell structure includes a protection plate structure and the battery cell structure; a receiving groove is formed between the end of the battery cell body and the top sealing edge of the battery cell structure, the protection plate structure is disposed in the receiving groove, and the protection plate structure is connected to the tab of the battery cell structure. The battery cell structure includes: a battery cell body, a top sealing edge, a tab, and a tab seal; the top sealing edge is connected to the end of the battery cell body and extends along a first direction, the tab is connected to the top sealing edge, and the tab seal is connected to the tab near the top sealing edge; a notch is provided between the top sealing edge and the tab seal and / or the tab, the notch is opened in the tab seal, or the notch extends from the tab seal to the tab, so that the tab bends in a direction opposite to the first direction through the notch. In this way, the tab can be bent and folded to a relatively extreme degree in the first direction through the gap between the top seal and the tab seal, or between the top seal and the tab and the tab, or between the top seal and the tab. This allows the tab to adhere to the side wall of the top seal, facilitating the placement of the protection plate structure on the side of the top seal. This reduces the height of the protection plate structure, decreases the capacity occupied by the cell body, and increases the energy density of the cell structure. It also avoids connecting the protection plate structure to the top of the tab, which would result in a high top height of the battery structure, further reducing the capacity space occupied by the cell body and increasing the energy density of the cell structure.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0091] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric cell structure, characterized by, The battery cell structure comprises a battery cell body, a top sealing edge, a tab and a tab sealing element; The top sealing edge is connected to the end of the battery cell body and extends in a first direction, the tab is connected to the top sealing edge, and the tab sealing element is connected to the tab near the top sealing edge; A notch is arranged between the top sealing edge and the tab sealing element and / or the tab, the notch is arranged on the tab sealing element, or the notch extends from the tab sealing element to the tab, so that the tab is bent in a direction opposite to the first direction through the notch.

2. The cell structure of claim 1, wherein, A first dimension of the notch in the first direction is A, and a second dimension of the notch in a second direction perpendicular to the first direction is C; The ratio of the second dimension C to the first dimension A satisfies 3≤C / A≤12.

3. The cell structure of claim 2, wherein, The first dimension A is any value in the range of 0.05-2mm.

4. The cell structure of claim 2, wherein, The second dimension C is any value in the range of 1.5-6mm.

5. The cell structure of claim 2, wherein, In the second direction, the distance between the notch and the edge of the tab is any value in the range of 0-2mm.

6. A battery assembly characterized by, The battery assembly comprises a protection plate structure and the battery cell structure according to any one of claims 1-5; An accommodating groove is formed between the end of the battery cell body and the top sealing edge of the battery cell structure, the protection plate structure is arranged in the accommodating groove, and the protection plate structure is connected to the tab of the battery cell structure.

7. The battery assembly of claim 6, wherein, The protection plate structure comprises a circuit board body, components and a connecting piece; The circuit board body comprises a first surface and a second surface adjacent to the first surface, the components are connected to the first surface, and the connecting piece is connected to the second surface, and the connecting piece is connected to the tab.

8. The battery assembly of claim 7, wherein, The connecting piece is connected to the edge of the second surface and extends to the first surface.

9. The battery assembly of claim 7, wherein, The protection plate structure comprises a circuit board body, components and a connecting piece; The circuit board body comprises a first surface and a third surface, the third surface is arranged away from the first surface, the components are connected to the first surface, and the connecting piece is connected to the third surface; The tab is provided with an extension part extending towards a second direction, and the connecting piece is connected to the extension part, wherein the second direction is perpendicular to the first direction.

10. The battery assembly of claim 9, wherein, The connecting piece is a U-shaped connecting piece provided with a connecting groove, and the extension part extends into the connecting groove and is connected to the inner wall of the connecting groove.

11. The battery assembly of any one of claims 7-10, wherein, The battery assembly further comprises a first packaging piece connected to the circuit board body and covering the components to package the protection plate structure, and the connecting piece is exposed to the first packaging piece.

12. The battery assembly of claim 11, wherein, The battery assembly further comprises a second packaging piece connected to the end of the battery cell body, and the second packaging piece covers the circuit board body, the first packaging piece, the connecting piece, the tab and the top sealing edge.

13. The battery assembly of any one of claims 7-10, wherein, The battery assembly further comprises a third packaging piece connected to the end of the battery cell body, and the third packaging piece covers the circuit board body, the components, the connecting piece, the tab and the top sealing edge.

14. An electronic device, comprising: The electronic device comprises the battery assembly according to any one of claims 6-13, or the battery cell structure according to any one of claims 1-5.

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