Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, and relates to the technical field of batteries. According to the battery provided by the utility model, aiming at the adjacent staggered battery cells, according to the battery provided by the embodiment of the invention, each part of the top sealing edge is arranged on the same side of the plate main body in the thickness direction, so that the battery protection plate does not need to be provided with a notch for the top sealing edge to penetrate in order to avoid the top sealing edge in the prior art. Therefore, compared with the prior art, the battery and the battery protection plate provided by the invention have the advantages that the plate main body has a larger area due to no notch, so that the part distribution space on the battery protection plate can be increased, the through-flow of the battery protection plate can be increased, and the energy density of the battery can be improved.

Description

Technical Field

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

[0002] In the prior art, the top sealing edge of a pouch cell is typically as follows: Figure 4 The bending process can interfere with the battery protection board. To avoid this interference, a notch is usually made in the battery protection board to avoid the top seal edge. However, this local notch reduces the area of ​​the battery protection board, forming a bottleneck position, affecting the current flow of the battery, reducing the area of ​​the battery protection board, and also reducing the overall energy density of the battery. Utility Model Content

[0003] In view of this, this application provides a battery and an electrical device, relating to the field of battery technology.

[0004] In a first aspect, this application provides a battery, the battery comprising:

[0005] A plurality of battery cells having a thickness direction, the plurality of battery cells including two adjacent battery cells that are staggered, wherein the top of the first of the two adjacent battery cells extends beyond the top of the second of the two adjacent battery cells, and the first of the two adjacent battery cells includes a top sealing edge located at the top of the first of the two adjacent battery cells;

[0006] A battery protection board, the battery protection board including a board body extending along the top of the first and the top of the second, each portion of the top sealing edge being located on the same side of the board body in the thickness direction.

[0007] Preferably, the top sealing edge is parallel to the main body of the plate.

[0008] Preferably, the battery cell has a width direction, the battery cell includes a battery cell body, the top sealing edge is connected to the top of the battery cell body, the top sealing edge has an extension in the width direction that extends beyond the battery cell body, and the extension is parallel to the plate body.

[0009] Preferably, the battery cell has a width direction, the battery cell includes a battery cell body, the top sealing edge is connected to the top of the battery cell body, the top sealing edge includes a top sealing body and an extension connected to each other, the top sealing body extends along the width direction, and the extension extends away from the plate body.

[0010] Preferably, the battery includes a reinforcement structure that covers the outside of the extension.

[0011] Preferably, the battery includes a reinforcement structure that covers at least a portion of the outer side of the top seal.

[0012] Preferably, the reinforcing structure is an adhesive layer.

[0013] Preferably, the battery cell has a width direction, the battery cell includes a battery cell body, the top sealing edge is connected to the top of the battery cell body, the top sealing edge has an extension in the width direction that extends beyond the battery cell body, the extension is parallel to the plate body, and the reinforcing structure covers the outside of the extension.

[0014] Preferably, the battery cell has a width direction, and the plurality of battery cells includes three battery cells that are sequentially adjacent in the width direction, wherein the top of the battery cell located in the middle of the three battery cells extends beyond the tops of the battery cells located on both sides.

[0015] Secondly, this application provides an electrical device, which includes the battery described above.

[0016] According to the battery provided in this application, for adjacent misaligned cells, each part of the top sealing edge is disposed on the same side of the main body of the battery plate in the thickness direction. Therefore, unlike in the prior art, the battery protection board does not need to have a notch for the top sealing edge to pass through in order to avoid it. Thus, compared to the prior art, the main body of the battery protection board provided in this application has a larger area due to the absence of a notch, thereby increasing the space for components on the battery protection board, increasing the current flow of the battery protection board, and improving the energy density of the battery.

[0017] 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

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram showing a three-dimensional view of a battery protection board for a battery provided according to an embodiment of this application is shown;

[0020] Figure 2 It shows Figure 1 A schematic diagram of the three-dimensional structure at point A and its interaction with the battery cell;

[0021] Figure 3A schematic diagram showing a three-dimensional view of a portion of the battery structure provided according to an embodiment of this application is shown;

[0022] Figure 4 A schematic diagram showing a three-dimensional view of a battery in the prior art is provided.

[0023] Figure label:

[0024] 100-Battery protection board; 110-Board body; 200-Battery cell; 210-Battery cell body; 220-Top sealing edge; 221-Extension. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] According to a first aspect of the embodiments of this application, a battery is provided, which will be described below in conjunction with... Figures 1 to 3 Describe the battery's structure and working principle in detail.

[0030] According to the embodiments of this application, the battery includes a plurality of battery cells 200 and a battery protection board 100.

[0031] In an embodiment, the battery cell 200 has a thickness direction, and the plurality of battery cells 200 include two adjacent battery cells 200 that are staggered. The top of the first of the two adjacent battery cells 200 extends beyond the top of the second of the two adjacent battery cells 200, and the first includes a top sealing edge 220 located at the top of the first.

[0032] In an embodiment, the battery protection board 100 includes a board body 110 that extends along the top of a first and a second, with each portion of the top sealing edge 220 disposed on the same side of the board body 110 in the thickness direction.

[0033] Thus, according to the battery provided in this application embodiment, for adjacent misaligned cells 200, each portion of the top sealing edge 220 is disposed on the same side of the plate body 110 in the thickness direction. Therefore, the battery protection plate 100 does not need to have a notch for the top sealing edge 220 to pass through, as is done in the prior art. Therefore, compared to the prior art, the plate body 110 of the battery protection plate 100 has a larger area due to the absence of a notch, thereby increasing the space for components on the battery protection plate 100, increasing the current flow of the battery protection plate 100, and improving the energy density of the battery.

[0034] In this embodiment, the battery cell 200 may be, for example, a pouch cell 200, i.e., a pouch cell 200 obtained by encapsulating a bare battery cell 200 with an aluminum-plastic film. In this embodiment, the pouch cell 200 may have two perpendicular length directions (height direction), width directions, and thickness directions. As an example, the board body 110 may be, for example, a PCB (Printed Circuit Board).

[0035] In this embodiment, the common process of encapsulating the battery cell 200 and forming a top sealing edge 220 on the top of the battery cell 200 is to bend the top sealing edge 220. Specifically, when the top sealing edge 220 is not bent, it extends beyond the battery cell body 210 in the width direction of the battery cell 200. Prior to this application, in the prior art, to ensure that the width direction of the battery cell 200 is small and to slightly improve the top sealing strength of the battery cell 200, this portion extending beyond the battery cell body 210 was bent to extend along the thickness direction of the battery cell 200.

[0036] However, in the prior art, the battery protection board 100 extends along the top of the cell 200, which interferes with the portion that extends along the thickness direction after bending, as described above. In order to avoid this portion, the prior art has a notch in the battery protection board 100 to accommodate this portion, which causes the battery protection board 100 to have the problems mentioned above.

[0037] According to the battery protection plate 100 provided in the embodiments of this application, each portion of the top sealing edge 220 is disposed on the same side of the plate body 110 in the thickness direction. In this way, the plate body 110 of the battery protection plate 100 does not interfere with the top sealing edge 220, and the two extend independently. This avoids interference forcing the battery protection plate 100 to remove material, forming a notch similar to those in the prior art, which would reduce the fabric area, current flow, and energy density of the battery protection plate 100. In an embodiment, as an example, in the implementation described above, the top sealing edge 220 can still maintain the bent form as in the prior art, with the battery protection plate 100 passing over its outer side. In other examples, the extension direction of the portion of the bent top sealing edge 220 extending along the thickness direction can be adjusted, as will be explained in detail below.

[0038] In the embodiment, the battery protection board 100 extends along the top of the two misaligned battery cells 200. Specifically, taking the main body 110 of the battery protection board 100 (e.g., a rigid board, i.e., a printed circuit board) as an example, for two adjacent misaligned battery cells 200, the main body 110 of the battery protection board 100 may have, for example, three parts. The parts located on both sides in the width direction correspond to the top of the two battery cells 200 respectively, and the part located between these two parts for connecting these two parts can extend along the length direction of the battery cells 200, so that the main body 110 presents a stepped structure as a whole.

[0039] According to the battery provided in the embodiments of this application, the top sealing edge 220 can be parallel to the plate body 110. In the embodiments, the top sealing edge 220 can extend along the width direction as a whole, without having a bending position similar to that in the prior art, so that the top sealing edge 220 is arranged parallel to the plate body 110, which to a certain extent ensures that the top sealing edge 220 does not interfere with the plate body 110.

[0040] According to the battery provided in the embodiments of this application, the cell 200 has a width direction. As described above, the cell 200 may include a cell body 210, and a top sealing edge 220 may be connected to the top of the cell body 210. The top sealing edge 220 has an extension 221 that extends beyond the cell body 210 in the width direction, and the extension 221 is parallel to the plate body 110.

[0041] In this embodiment, the extension 221 can be understood as the portion of the top sealing edge 220 that would normally be bent and extend along the thickness direction of the cell body 210 in the prior art. In this example, this portion extending beyond the cell body 210 is parallel to the board body 110 and thus does not interfere with the board body 110. The specific extension method of other portions of the top sealing edge 220 is not specifically limited. For example, other portions of the top sealing edge 220 may not extend in the manner described above where the top sealing edge 220 is entirely parallel to the board body 110, but may be slightly inclined relative to the width direction, but still not interfere with the board body 110 in spatial position.

[0042] According to the battery provided in the embodiments of this application, the extension 221 extends away from the main body 110 of the back plate, for example, after being bent, it extends along the direction of the main body 110 of the back plate, so as not to interfere with the battery protection board 100.

[0043] According to the battery provided in the embodiments of this application, the battery may include a reinforcing structure, which may cover the outside of the extension 221.

[0044] In this embodiment, the reinforcement structure can be used to reinforce the extension 221 by covering the outside of the extension 221, thereby improving the reliability of the battery.

[0045] According to the battery provided in the embodiments of this application, the reinforcing structure covers at least a portion of the outer side of the top sealing edge 220. In the embodiments, not entirely the same as the above examples, the reinforcing structure may, for example, originate from the overall structure of the top sealing edge 220 and cover the outer side of the overall structure of the top sealing edge 220, thus also serving to reinforce the top sealing edge 220. For example, the reinforcing structure may completely cover the outer side of the top sealing edge 220; however, the reinforcing structure may also cover the outer side of the portion of the top sealing edge 220 excluding the extension 221. The reinforcing structure may also cover the outer side of the extension 221 and the outer side of other structural portions. Alternatively, the reinforcing portion may also partially cover the outer side of the extension 221 and the outer side of other portions.

[0046] According to the battery provided in the embodiments of this application, the reinforcing structure may be, for example, an adhesive layer covering at least a portion of the outer side of the top seal edge 220. Based on the examples described above, the reinforcing structure may be an adhesive layer applied to the outer side of the top seal edge 220, which may be obtained by curing a liquid adhesive, specifically by means such as ultraviolet irradiation or heating.

[0047] According to the battery provided in the embodiments of this application, the plurality of battery cells 200 includes three battery cells 200 that are sequentially adjacent in the width direction. For example, in the embodiments of this application, the number of battery cells 200 is three. In the embodiments, the top of the battery cell 200 located in the middle of the three battery cells 200 extends beyond the tops of the battery cells 200 located on both sides of the three battery cells 200. Correspondingly, the battery protection plate 100 forms two stepped positions.

[0048] According to a second aspect of the embodiments of this application, an electrical device is provided. The electrical device may include the battery described above, and also includes the aforementioned beneficial effects, which will not be repeated here. In embodiments, as an implementation, the electrical device may be, for example, a mobile communication device such as a handheld telephone or a portable electronic device such as a personal computer.

[0049] The above are merely preferred embodiments of this application and do not limit the scope of protection of this application. Any equivalent structural transformations made based on the innovative concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A battery, characterized by, The battery includes: A plurality of battery cells, the battery cells having a thickness direction, the plurality of battery cells including two adjacent battery cells that are staggered, the top of the first of the two adjacent battery cells extending beyond the top of the second of the two adjacent battery cells, the first of the battery cells including a top sealing edge, the top sealing edge being located at the top of the first of the battery cells; A battery protection board, the battery protection board including a board body extending along the top of the first and the top of the second, each portion of the top sealing edge being located on the same side of the board body in the thickness direction.

2. The battery of claim 1, wherein, The top sealing edge is parallel to the main body of the plate.

3. The battery of claim 1, wherein, The battery cell has a width direction, the battery cell includes a battery cell body, the top sealing edge is connected to the top of the battery cell body, the top sealing edge has an extension in the width direction that extends beyond the battery cell body, and the extension is parallel to the plate body.

4. The battery according to claim 1, characterized in that, The battery cell has a width direction and includes a battery cell body. The top sealing edge is connected to the top of the battery cell body. The top sealing edge includes a top sealing body and an extension connected to each other. The top sealing body extends along the width direction, and the extension extends away from the plate body.

5. The battery according to claim 3 or 4, characterized in that, The battery includes a reinforcement structure that covers the outside of the extension.

6. The battery of claim 1, wherein, The battery includes a reinforcement structure that covers at least a portion of the outer side of the top seal.

7. The battery of claim 6, wherein, The reinforcing structure is an adhesive layer.

8. The battery of claim 6, wherein, The battery cell has a width direction and includes a battery cell body. The top sealing edge is connected to the top of the battery cell body. The top sealing edge has an extension in the width direction that extends beyond the battery cell body. The extension is parallel to the plate body, and the reinforcing structure covers the outside of the extension.

9. The battery of claim 1, wherein, The battery cell has a width direction, and the plurality of battery cells includes three battery cells that are sequentially adjacent in the width direction, wherein the top of the battery cell located in the middle of the three battery cells extends beyond the tops of the battery cells located on both sides.

10. An electrical appliance, characterized in that, The electrical equipment includes a battery as described in any one of claims 1 to 9.

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