Battery and electric device

Abstract

This application relates to the field of battery structure, and more particularly to a battery and an electrical device. The battery includes a cell and a flexible plate assembly, the flexible plate assembly including at least one flexible sub-plate; the cell has a tab at its head; the flexible sub-plate includes a first connecting portion and a second connecting portion; one side of the first connecting portion faces the top of the cell, and the first connecting portion is connected to the tab of the cell; one end of the second connecting portion is connected to the first connecting portion, and the other end of the second connecting portion extends along the height direction of the cell and in a direction away from the cell; a connector is provided on the second connecting portion for electrical connection with an external device. The battery provided in this application, by setting a structure in which a pure flexible plate forms a protective plate, can reduce the overall thickness of the protective plate and reduce the space occupied; and the flexible plate does not need to be bent 180 degrees, which can further reduce the thickness of the protective plate, thereby improving the battery space utilization rate.

Description

Technical Field

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

[0002] Pouch batteries, with their lightweight and customizable size, are gradually gaining widespread use. Pouch batteries typically require a protection board to provide protection against overcharge, over-discharge, and short circuits.

[0003] Existing protection boards typically have components arranged on the entire surface of a printed circuit board. The structure of the protection board requires a combination of rigid boards, soldered boards, and reinforcing boards, resulting in a relatively thick protection board that occupies a large amount of space. Furthermore, when the battery is assembled into the terminal device, the protection board needs to be electrically connected to the motherboard of the terminal device through a flexible circuit board. The flexible circuit board is soldered to one side of the protection board and needs to be bent 180 degrees before it can be stretched to the motherboard area for connection. This flexible circuit board structure with a 180-degree bend requires the battery to reserve extra space for it, further exacerbating the problem of low space utilization and reducing the usable space of the battery cell. Utility Model Content

[0004] The purpose of this application is to provide a battery and power supply device to solve the problem that the protection board is too thick and occupies a large space.

[0005] This application provides a battery, including a cell and a flexible plate assembly, the flexible plate assembly including at least one flexible sub-plate; the head of the cell is provided with a tab;

[0006] The flexible partition includes a first connecting part and a second connecting part; one side of the first connecting part faces the top of the battery cell, and the first connecting part is connected to the electrode tab of the battery cell; one end of the second connecting part is connected to the first connecting part, and the other end of the second connecting part extends along the height direction of the battery cell and in a direction away from the battery cell; a connector is provided on the second connecting part, and the connector is used for electrical connection with external devices.

[0007] In the above technical solution, the flexible plate assembly further includes a reinforcing plate;

[0008] At least one of the flexible partitions has components arranged on its first connecting portion, and along the height direction of the battery cell, the components and the reinforcing plate are respectively located on both sides of the first connecting portion, with at least a portion of the reinforcing plate opposite to the position of the components.

[0009] In the above technical solution, the flexible plate assembly further includes an adapter; the adapter includes a first plate portion and a second plate portion, the first plate portion and the second plate portion being connected to form a U-shaped plate structure;

[0010] The first plate portion is connected to the first connecting portion on the side opposite to the second plate portion; the electrode extends into the U-shaped plate structure from the opening of the U-shaped plate structure to connect to the side of the second plate portion near the first plate portion; the side of the second plate portion opposite to the first plate portion is connected to the top of the battery cell.

[0011] Furthermore, the above technical solution also includes a second insulating member; the second insulating member at least covers the electrode tab to isolate the electrode tab from the first plate portion.

[0012] In the above technical solution, the number of flexible plates is two, the two flexible plates are arranged at intervals, and the head of the battery cell is provided with at least two tabs;

[0013] The first connecting portion of any one of the flexible panels is connected to at least one of the tabs.

[0014] In the above technical solution, the battery cell further includes a battery cell body and a package body for encapsulating the battery cell body. The package body includes a top sealing edge disposed on the top of the battery cell body and a side sealing edge disposed on the side. The top sealing edge is bent toward the top of the battery cell body. Along the width direction of the battery cell body, the end of the top sealing edge is provided with a first folded corner.

[0015] The side sealing edge bends toward the side of the battery cell body, and a second bend is provided at the end of the side sealing edge extending beyond the side of the battery cell body along the height direction of the battery cell body;

[0016] Both the first and second bends are bent toward the top of the cell body, and the second bend is located between the first bend and the cell body to form an inward bend.

[0017] In the above technical solution, a connecting edge is further provided between the side of the battery cell body and the top of the battery cell body; the second bend portion is bent along the connecting edge, and the second bend portion is attached to the top of the packaged battery cell body;

[0018] The first bend at least covers a portion of the second bend.

[0019] In the above technical solution, the included angle α between the first bend and the second bend is between 0° and 21°.

[0020] And / or, the angle β formed between the portion of the top sealing edge covering the inner corner and the top of the cell body is between 0° and 10°;

[0021] And / or, the protrusion height h of the corner formed between the top sealing edge and the side sealing edge is between 1 mm and 2 mm.

[0022] In the above technical solution, a first insulating member is further included; the first insulating member extends from the side sealing edge to the top sealing edge to cover the inner corner.

[0023] And / or, it also includes a third insulating element; the third insulating element covers the side of the first connection portion away from the battery cell, and a portion of the third insulating element is connected to the battery cell.

[0024] This application also provides an electrical device, including the battery described in the above-described scheme.

[0025] Compared with the prior art, the beneficial effects of this application are as follows:

[0026] The battery provided in this application, by setting a structure in which a pure flexible board is used to form a protection board, can reduce the overall thickness of the protection board and reduce the space occupied; and the flexible board does not need to be bent 180 degrees, which can further reduce the thickness of the protection board, thereby improving the battery space utilization rate.

[0027] This application also provides an electrical device, including the battery described in the above solution. Based on the above analysis, it is clear that the electrical device also possesses the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a first structural schematic diagram of the battery provided in this application;

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 A schematic diagram of the first folding structure of the first and second folding portions provided in this application;

[0032] Figure 4 A schematic diagram of the second folding structure of the first and second folding portions provided in this application;

[0033] Figure 5 This is a schematic diagram of the second structure of the battery provided in this application;

[0034] Figure 6 A third structural schematic diagram of the battery provided in this application;

[0035] Figure 7 for Figure 6 Enlarged diagram of point B in the middle.

[0036] In the diagram: 101-cell body; 102-top sealing edge; 103-side sealing edge; 104-first folded corner; 105-second folded corner; 106-inner folded corner; 107-flexible board assembly; 108-first insulating component; 109-flexible partition; 110-first connecting part; 111-second connecting part; 112-reinforcing plate; 113-components; 114-adapter; 115-tab; 116-double-sided adhesive; 117-second insulating component; 118-third insulating component. Detailed Implementation

[0037] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] 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.

[0039] In the description of this application, it should be noted that, unless otherwise explicitly 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 according to the specific circumstances.

[0040] Example 1

[0041] See Figures 1 to 7As shown, the battery provided in this application includes a battery cell, which includes a battery cell body 101 and a package containing the battery cell body 101. The package is specifically formed by a rectangular package bag, with the battery cell body 101 placed inside the package bag body. The size of the package bag is larger than the size of the battery cell body 101. At the top and left and right sides of the battery cell body 101, the package bag body forms a top sealing edge 102 and a side sealing edge 103 by adhesive bonding, respectively, to reliably encapsulate the battery cell body 101.

[0042] The top sealing edge 102 is bent towards the top of the cell body 101 so that most of the top sealing edge 102 can fit against the top of the encapsulated cell body 101, thereby reducing the space occupied by the top sealing edge 102. The side sealing edge 103 is bent towards the side of the cell body 101 so that most of the side sealing edge 103 can fit against the side of the encapsulated cell body 101, thereby reducing the space occupied by the side sealing edge 103. The connection between the top sealing edge 102 and the side sealing edge 103 extends beyond the top and side of the cell body 101; the space occupied at this location can be reduced by folding the corner at this point.

[0043] Specifically, along the width direction of the cell body 101, the two ends of the top sealing edge 102 along its length direction are provided with first bend portions 104; along the height direction of the cell body 101, the side sealing edge 103 extends to the end beyond the side of the cell body 101 and is provided with second bend portions 105; both the first bend portions 104 and the second bend portions 105 are bent towards the top of the cell body 101, and in fact, the first bend portions 104 and the second bend portions 105 are divided by the crease formed between them. The first bend portion 104 is located on the side of the second bend portion 105 away from the cell body 101, and the second bend portion 105 is located between the first bend portion 104 and the cell body, forming an inner bend 106. The area of ​​the top sealing edge 102 opposite to the top of the cell body 101 covers the inner bend 106, so that the corner protrusion is low, thereby reducing its space occupation. Furthermore, the top of the battery cell has tabs 115 for connecting to the flexible plate assembly 107. The inner fold 106 is set on the top of the battery cell, which can utilize the space at both ends of the flexible plate assembly 107, making the layout between components more compact and thus achieving reasonable use of space.

[0044] In an optional embodiment, a connecting edge is provided between the side and the top of the battery cell body 101; the second bend portion 105 is bent along the connecting edge and fits against the top of the packaged battery cell body 101. When the second bend portion 105 is bent along the connecting edge, the second bend portion 105 can completely fit against the top of the battery cell body 101, thereby minimizing the protrusion of the second bend portion 105 and reducing the space occupied.

[0045] Furthermore, the first bend portion 104 at least covers a portion of the second bend portion 105, and the projection of the first bend portion 104 onto the plane containing the top of the cell body 101 is located within the top area of ​​the cell body 101.

[0046] In this embodiment, since the first corner portion 104 and the second corner portion 105 are divided by a crease formed between them, the crease is located at different positions, and the dimensions of the first corner portion 104 and the second corner portion 105 are also different. For example, for the case where the top sealing edge 102 and the side sealing edge 103 have the same width, see [reference needed]. Figure 3 As shown, when the first corner portion 104 extends from the top sealing edge 102 to the end beyond the top of the cell body 101, the second corner portion 105 is at its smallest size. The first corner portion 104 and the second corner portion 105 are triangles of the same size, and the first corner portion 104 completely covers the second corner portion 105, allowing the inner corner 106 to be completely covered. (See also...) Figure 4 As shown, when the second corner portion 105 is rectangular, the first corner portion 104 does not extend beyond the top of the cell body 101, and the first corner portion 104 is triangular and can only cover a part of the second corner portion 105. The other part of the second corner portion 105 is the part where the inner corner 106 is exposed.

[0047] Preferably, the first bend 104 completely covers the second bend 105 to make the flatness of the inner bend 106 position higher.

[0048] Specifically, see Figure 2 As shown, the included angle α between the first folded portion 104 and the second folded portion 105 of the inner folded angle 106 is between 0° and 21°, so that the included angle β between the upper surface of the portion of the top sealing edge 102 covering the inner folded angle and the top of the cell is between 0° and 10°; the protrusion height h of the corner formed between the top sealing edge 102 and the side sealing edge 103 is between 1mm and 2mm, which can reduce the degree of protrusion of the corner and thus reduce the space occupied.

[0049] In an optional embodiment, the battery further includes a first insulating member 108; the first insulating member 108 extends from the side sealing edge 103 to the top sealing edge 102 to cover the inner corner 106.

[0050] In this embodiment, the inner corner 106 is a location where stress concentration and potential electrical contact points are likely to occur. The first insulating member 108 covering the inner corner 106 can provide mechanical protection and can effectively isolate the electrical contact between the battery cell body 101 and other components, which helps to prevent short circuits and leakage, and improves the safety and reliability of the battery cell.

[0051] Specifically, the first insulating element 108 is insulating tape or UV adhesive, which can be wrapped and covered at the folded corner to improve the strength and insulation of that location.

[0052] Example 2

[0053] The battery in this second embodiment is an improvement on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this second embodiment.

[0054] See Figures 5 to 7 As shown, in an optional embodiment, the battery further includes a flexible plate assembly 107, which includes at least one flexible sub-plate 109. The flexible sub-plate 109 includes a first connecting portion 110 and a second connecting portion 111. One side of the first connecting portion 110 faces the top of the cell, and the first connecting portion 110 is connected to the tab 115 of the cell. The second connecting portion 111 is located on the other side of the first connecting portion 110 and is connected to the first connecting portion 110. The surface of the second connecting portion 111 is perpendicular to the thickness direction of the cell, and the second connecting portion 111 is provided with connector pads.

[0055] In this embodiment, such as Figure 6 As shown, the flexible plate assembly 107 includes two flexible plates 109, which are spaced apart along the length of the top surface of the battery cell. The head of the battery cell has at least two tabs; the first connecting portion of any one flexible plate is connected to at least one tab. During battery installation, pulling on one flexible plate 109 will not affect the other flexible plate 109, thus increasing the mobility of the flexible plate assembly 107 and reducing installation difficulty.

[0056] Furthermore, in the prior art, the flexible partition 109 is formed into a two-layer structure by 180 degrees in the direction parallel to the top surface of the battery cell. Bending the structure causes a rebound, making assembly difficult. In this application, one side of the first connecting part 110 faces the top of the battery cell, and the second connecting part 111 is perpendicular to the thickness direction of the battery cell and perpendicularly connected to the first connecting part 110. The connector pads on the second connecting part 111 are equipped with short-circuit connectors to connect to the mainboard of the entire device. The first connecting part 110 is a single-layer structure, occupying less space, thereby increasing the space in the height direction of the battery cell.

[0057] In an optional embodiment, the flexible plate assembly 107 further includes a reinforcing plate 112; at least one flexible partition 109 has components 113 arranged on its first connecting portion 110, and along the height direction of the battery cell, the components and the reinforcing plate 112 are respectively located on both sides of the first connecting portion 110. Specifically, the components 113 are located on the side of the first connecting portion 110 facing the battery cell; the reinforcing plate 112 is located on the side of the first connecting portion 110 away from the battery cell, and the reinforcing plate 112 and the components 113 are positioned opposite each other.

[0058] In this embodiment, such as Figure 6 and Figure 7 As shown, the first connecting portion 110 of the flexible partition 109 on the left side is not fitted with components 113, while a portion of the first connecting portion 110 of the flexible partition 109 on the right side is fitted with anti-counterfeiting devices and other components 113. A reinforcing plate 112 is provided on the back of the first connecting portion 110 at the corresponding position to enhance the local strength of the first connecting portion 110, thereby improving the reliability of the connection between the first connecting portion 110 and the anti-counterfeiting device. Furthermore, because the reinforcing plate 112 is small in size, it has a minimal impact on the overall thickness of the flexible board assembly 107, thus occupying less space.

[0059] In an optional embodiment, the flexible plate assembly 107 further includes an adapter 114. The adapter 114 includes a first plate portion and a second plate portion, which are connected to form a nickel sheet with a U-shaped plate structure. The side of the first plate portion facing away from the second plate portion is connected to the first connecting portion 110. The tab 115 extends into the U-shaped plate structure from the opening to connect with the side of the second plate portion near the first plate portion, thereby realizing the electrical connection between the battery cell and the flexible plate assembly 107. The side of the second plate portion facing away from the first plate portion can be connected to the top of the battery cell through double-sided adhesive 116 to fix the adapter 114 to the top of the battery cell, and the adapter 114 can also provide support for the flexible plate 109.

[0060] In an optional embodiment, the battery further includes a second insulating member 117; the second insulating member 117 at least covers the tab 115 to isolate the tab 115 from the first plate. Specifically, the second insulating member 117 is insulating tape, which effectively prevents direct contact between the tab 115 and the first plate, thereby reducing the risk of short circuits. Optionally, the second insulating member 117 can extend from the opening of the U-shaped plate structure towards the cell and overlap onto the cell to expand the insulation range.

[0061] In an optional embodiment, the battery further includes a third insulating component 118. The third insulating component 118 covers the side of the first connecting portion 110 opposite to the battery cell, and is connected to the battery cell. Specifically, the third insulating component 118 is insulating tape, extending to both sides of the battery cell and fixed thereto. The third insulating component 118 effectively secures the flexible plate assembly 107, preventing the flexible plate assembly 107 from contacting the overall frame and forming lithium-ion channels that could lead to corrosion of the battery cell, thus ensuring battery safety.

[0062] Example 3

[0063] This application provides an electrical device in embodiment three, which includes the battery of any of the above embodiments. Therefore, it has all the beneficial technical effects of the battery of any of the above embodiments, which will not be repeated here.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not 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; and these 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. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. A battery, characterized by, The battery cell includes a flexible board assembly, wherein the flexible board assembly includes at least one flexible sub-board; and the battery cell has a tab at its head. The flexible partition includes a first connecting part and a second connecting part; one side of the first connecting part faces the top of the battery cell, and the first connecting part is connected to the electrode tab of the battery cell; one end of the second connecting part is connected to the first connecting part, and the other end of the second connecting part extends along the height direction of the battery cell and in a direction away from the battery cell; a connector is provided on the second connecting part, and the connector is used for electrical connection with external devices.

2. The battery of claim 1, wherein, The flexible panel assembly also includes a reinforcing plate; At least one of the flexible partitions has components arranged on its first connecting portion, and along the height direction of the battery cell, the components and the reinforcing plate are respectively located on both sides of the first connecting portion, with at least a portion of the reinforcing plate opposite to the position of the components.

3. The battery of claim 1, wherein, The flexible panel assembly further includes an adapter; the adapter includes a first plate portion and a second plate portion, the first plate portion and the second plate portion being connected to form a U-shaped plate structure; The first plate portion is connected to the first connecting portion on the side opposite to the second plate portion; the electrode extends into the U-shaped plate structure from the opening of the U-shaped plate structure to connect to the side of the second plate portion near the first plate portion; the side of the second plate portion opposite to the first plate portion is connected to the top of the battery cell.

4. The battery of claim 3, wherein, It also includes a second insulating element; the second insulating element at least covers the tab to isolate the tab from the first plate portion.

5. The battery of claim 1, wherein, The number of flexible plates is two, and the two flexible plates are arranged at intervals. The head of the battery cell is provided with at least two tabs. The first connecting portion of any one of the flexible panels is connected to at least one of the tabs.

6. The battery of claim 1, wherein, The battery cell includes a battery cell body and a package body for encapsulating the battery cell body. The package body includes a top sealing edge disposed on the top of the battery cell body and a side sealing edge disposed on the side. The top sealing edge is bent toward the top of the battery cell body and a first folded corner is provided at the end of the top sealing edge along the width direction of the battery cell body. The side sealing edge bends toward the side of the battery cell body, and a second bend is provided at the end of the side sealing edge extending beyond the side of the battery cell body along the height direction of the battery cell body; Both the first and second bends are bent toward the top of the cell body, and the second bend is located between the first bend and the cell body to form an inward bend.

7. The battery of claim 6, wherein, A connecting edge is provided between the side portion and the top portion of the battery cell body; the second bend portion is bent along the connecting edge, and the second bend portion is attached to the top portion of the encapsulated battery cell body; The first bend at least covers a portion of the second bend.

8. The battery of claim 7, wherein, The included angle α between the first bend and the second bend is between 0° and 21°; And / or, the angle β formed between the portion of the top sealing edge covering the inner corner and the top of the cell body is between 0° and 10°; And / or, the protrusion height h of the corner formed between the top sealing edge and the side sealing edge is between 1 mm and 2 mm.

9. The battery of claim 7, wherein, It also includes a first insulating element; the first insulating element extends from the side sealing edge to the top sealing edge to cover the inner corner; And / or, it also includes a third insulating element; the third insulating element covers the side of the first connection portion away from the battery cell, and a portion of the third insulating element is connected to the battery cell.

10. An electrical device, characterized by Includes the battery as described in any one of claims 1 to 9.

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