Battery and electronic device

Abstract

The utility model provides a kind of battery and electronic equipment, it is related to battery technical field.The battery includes battery protection plate and multiple electric core, the multiple electric core is stacked along the thickness direction of the electric core, the battery protection plate includes multiple hard boards, the multiple hard boards are spaced apart along the thickness direction, two adjacent hard boards in the multiple hard boards are connected, the hard board is perpendicular to the length direction of the electric core, the multiple hard boards and the multiple electric core one-to-one correspond, the electric core is connected with the corresponding hard board.Such, multiple hard boards can be arranged, the layout area of entire battery protection plate is increased, and the layout demand of component can be met.

Description

Technical Field

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

[0002] A battery protection circuit module (PCM) is a crucial component that protects batteries from damage caused by overcharging, over-discharging, and short circuits. A PCM consists of a flexible printed circuit (FPC) and a rigid printed circuit board (PCB), with components arranged on the surface of the rigid board.

[0003] With the development of battery technology, batteries with two cells began to appear. Each cell has two tabs, and both tabs in each cell are connected to a rigid board. The rigid board has a relatively small area for mounting components. However, with the increasing functionality of battery protection boards and the growing number of components, the area of ​​the rigid board cannot meet the mounting requirements of these components. Utility Model Content

[0004] In view of this, this application provides a battery and electronic device to solve the problem that the two tabs in each cell of the battery are connected to a rigid plate, the rigid plate has a small mounting area, and the mounting area of ​​the rigid plate cannot meet the mounting requirements of the components.

[0005] According to one aspect of this application, a battery is provided, the battery including a battery protection board and a plurality of battery cells, the plurality of battery cells being stacked along the thickness direction of the battery cells, the battery protection board including a plurality of rigid plates, the plurality of rigid plates being spaced apart along the thickness direction, two adjacent rigid plates being connected, the rigid plates being perpendicular to the length direction of the battery cells, the plurality of rigid plates corresponding one-to-one with the plurality of battery cells, and the battery cells being connected to the corresponding rigid plate.

[0006] Preferably, the battery protection board further includes multiple components, and the rigid board includes a first surface and a second surface that are opposite to each other in the length direction, and the components are disposed on both the first surface and the second surface.

[0007] Preferably, the battery cell comprises an aluminum-plastic film, the aluminum-plastic film comprising a deep pit surface and a shallow pit surface opposite to each other in the thickness direction, for any two adjacent battery cells, The pitted surface of the aluminum-plastic film in one of the battery cells faces each other, as does the pitted surface of the aluminum-plastic film in another battery cell. Alternatively, the shallow pit surface of the aluminum-plastic film in one of the battery cells faces each other with the shallow pit surface of the aluminum-plastic film in another battery cell.

[0008] Preferably, the battery protection board further includes a flexible board and a connector, the connector being disposed on the flexible board, and the flexible board being connected to the first surface of the rigid board.

[0009] Preferably, the battery cell includes a connecting assembly, the connecting assembly includes a positive tab and a negative tab, the positive tab and the negative tab extend from the aluminum-plastic film, and both the positive tab and the negative tab are connected to the rigid plate corresponding to the battery cell; The connecting component is located on one side of the cell in the width direction, and the connecting components in two adjacent cells are located on different sides in the width direction.

[0010] Preferably, at least two of the plurality of rigid plates are staggered in the width direction.

[0011] Preferably, the battery protection board further includes a connecting plate, and two adjacent rigid boards among the plurality of rigid boards are connected through the connecting plate; The connecting plate includes a first copper layer and a second copper layer, the thickness of the first copper layer being greater than the thickness of the second copper layer. The first copper layer is used to transmit current, and the second copper layer is used to transmit signals.

[0012] Preferably, the battery cell further includes an adhesive, and two adjacent battery cells in the plurality of battery cells are connected by the adhesive.

[0013] Preferably, the battery further includes an injection molded part, the heads of the plurality of cells are all connected to the injection molded part, and the plurality of rigid plates are all encased inside the injection molded part.

[0014] According to another aspect of this application, an electronic device is provided, the electronic device comprising the battery described above.

[0015] In the battery of this application, multiple battery cells are stacked along their thickness direction. The battery protection board includes multiple rigid plates, which are spaced apart along their thickness direction. Adjacent rigid plates are connected. The rigid plates are perpendicular to the length direction of the battery cells, and each rigid plate corresponds to one of the battery cells. Thus, components can be placed on all the rigid plates, increasing the overall component placement area of ​​the battery protection board and meeting the component placement requirements. Attached Figure Description

[0016] 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.

[0017] Figure 1 A three-dimensional structural diagram of the battery is shown; Figure 2 An exploded view of the battery is shown; Figure 3 A schematic diagram of the battery cell structure is shown; Figure 4 The diagram shows the relative positions of the two battery cells; Figure 5 A three-dimensional structural diagram of the battery protection board is shown from one perspective. Figure 6 A three-dimensional structural diagram of the battery protection board from another perspective is shown; Figure 7 The diagram shows the relative positions of the two battery cells and the battery protection board.

[0018] Icons: 1-Battery cell; 11-Positive tab; 12-Negative tab; 13-Aluminum-plastic film; 131-Wrapping body; 132-Top seal; 133-Side seal; 2-Battery protection board; 21-Rigid board; 22-Flexible board; 23-Connecting board; 24-Connector; 25-Nickel sheet; 26-Components; 3-Adhesive parts; 4-Injection molded parts; 5-Adhesive layer; 6-Protective film; 7-Head adhesive tape; 8-Tail adhesive tape; 9-Top seal adhesive tape; S1-First surface; S2-Second surface; L1-Length direction; L2-Width direction; L3-Thickness direction. Detailed Implementation

[0019] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0020] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0021] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0022] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0023] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0024] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0025] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0027] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0028] According to one aspect of this application, a battery is provided, such as Figures 1 to 7 As shown, the battery includes a battery protection board 2 and multiple battery cells 1. The multiple battery cells 1 are stacked along the thickness direction L3. The battery protection board 2 includes multiple rigid plates 21, which are spaced apart along the thickness direction L3. Adjacent rigid plates 21 are connected. The rigid plates 21 are perpendicular to the length direction L1 of the battery cells 1. Each rigid plate 21 corresponds to one of the multiple battery cells 1, and each battery cell 1 is connected to its corresponding rigid plate 21. In this way, components can be placed on all the rigid plates 21, increasing the overall placement area of ​​the battery protection board 2 and meeting the placement requirements of the components 26.

[0029] Alternatively, the number of rigid boards 21 can be two, three, four or more.

[0030] Furthermore, since the rigid plate 21 is perpendicular to the length direction L1 of the battery cell 1, the rigid plate 21 occupies less space in the length direction L1. With a fixed size battery compartment for battery installation, the space that the battery cell 1 can occupy in the length direction L1 is increased, thereby improving the capacity of the battery cell 1. Simultaneously, the battery includes multiple battery cells 1, each connected to a corresponding rigid plate 21, and adjacent rigid plates 21 are connected. This enables fast charging of the battery, thereby improving the charging speed.

[0031] In the embodiments of this application, such as Figure 5 and Figure 6As shown, the rigid board 21 includes a first surface S1 and a second surface S2 that are opposite to each other in the longitudinal direction L1. The first surface S1 faces the battery cell 1, and nickel sheets 25 can be soldered onto the first surface S1. The positive electrode tab 11 and negative electrode tab 12 of the battery cell 1, corresponding to the rigid board 21, are respectively soldered to the two nickel sheets 25 on the rigid board 21, thereby realizing the connection between the battery cell 1 and the corresponding rigid board 21. Components 26 are provided on both the first surface S1 and the second surface S2. In this way, the rigid board 21 can be double-sided with components, and the component area is large. This allows more components 26 to be arranged on the entire rigid board 21, thereby increasing the functions of the battery protection board 2.

[0032] like Figure 5 and Figure 6 As shown, the battery protection board 2 also includes a flexible circuit board 22 and a connector 24. The connector 24 is soldered onto the flexible circuit board 22, and the flexible circuit board 22 is soldered onto the first surface S1 of one of the rigid circuit boards 21. When connecting the flexible circuit board 22 to the rigid circuit board 21, the rigid circuit board 21 and the flexible circuit board 22 can be soldered together based on the location of the structure in the battery compartment that is used to connect with the connector 24, and the rigid circuit board 21 with a smaller distance to it. In this way, the battery protection board 2 can select a smaller flexible circuit board 22, thereby reducing the manufacturing cost of the flexible circuit board 22.

[0033] Alternatively, the flexible board 22 can be soldered to one end of one of the rigid boards 21 in the longitudinal direction L1.

[0034] Furthermore, the battery protection board 2 also includes a connecting plate 23, which is welded to two adjacent rigid boards 21, thereby achieving connection between the two adjacent rigid boards 21. The connecting plate 23 may include a first copper layer and a second copper layer, with the first copper layer being thicker than the second copper layer. The first copper layer is used for transmitting current, and the second copper layer is used for transmitting signals. Thus, the thicker first copper layer is used for transmitting current, and the thinner second copper layer is used for transmitting signals, allowing the connecting plate 23 to balance current carrying capacity and signal transmission capability.

[0035] Optionally, the number of the first copper layer and the second copper layer can both be two.

[0036] Furthermore, at least two of the multiple rigid boards 21 are staggered in the width direction L2, meaning that the space occupied by the multiple rigid boards 21 in the length direction L1 is not completely overlapping. Thus, the mounting position of the rigid board 21 and its size in the width direction L2 can be selected based on the positions of the positive and negative tabs 11 and 12 in the cell 1 corresponding to the rigid board 21, as well as the component placement requirements on the rigid board 21, to reduce the size of the rigid board 21 in the width direction L2 and thereby reduce its cost.

[0037] In the embodiments of this application, the battery cell 1 includes a connecting assembly, which includes a positive tab 11 and a negative tab 12. Two nickel plates 25 are disposed on the rigid plate 21 corresponding to the battery cell 1, and the positive tab 11 and the negative tab 12 are respectively welded to the two nickel plates 25.

[0038] Optionally, such as Figure 2 As shown, the battery also includes an adhesive 3, and two adjacent cells 1 are bonded together by the adhesive 3, thereby realizing the connection between cells 1 and cells 1.

[0039] Preferably, the adhesive component 3 can be double-sided adhesive.

[0040] like Figure 2 and Figure 3 As shown, the battery cell 1 also includes an aluminum-plastic film 13 and an electrode assembly. The aluminum-plastic film 13 is divided into a wrapping body 131, a top sealing edge 132, and a side sealing edge 133. The electrode assembly is located inside the wrapping body 131. The wrapping body 131 has a deep pit surface and a shallow pit surface that are opposite to each other in the thickness direction L3. The positive electrode tab 11 and the negative electrode tab 12 extend from the top sealing edge 132. The top sealing edge 132 is bent and bonded to the wrapping body 131 through the adhesive layer 5. The top sealing adhesive paper 9 is bonded to the aluminum-plastic film 13, the positive electrode tab 11, and the negative electrode tab 12 respectively.

[0041] Optionally, the adhesive layer 5 can be a PUR hot melt adhesive layer (PUR stands for Polyurethane Reactive).

[0042] Furthermore, for two adjacent cells 1, the two deep pit surfaces in the two cells 1 face each other or the two shallow pit surfaces in the two cells 1 face each other. In this case, the positions of the positive tab 11 and the negative tab 12 of the two adjacent cells 1 are opposite.

[0043] Preferably, when there are two cells 1, the two pit surfaces face each other and are bonded together by the adhesive 3.

[0044] Furthermore, the connecting component is located on one side of the cell 1 in the width direction L2, and the connecting components in two adjacent cells 1 are located on different sides of the width direction L2. At this time, the positive electrode tab 11 and the negative electrode tab 12 of the cell 1 are tilted to one side of the width direction L2, and the heads of multiple cells 1 form a hollow space in the middle of the width direction L2. Thus, the distance between the positive electrode tab 11 and the negative electrode tab 12 is small. At this time, the connection between the rigid plate 21 and the cell 1 can be achieved by using a rigid plate 21 with a small size in the width direction L2.

[0045] Optionally, the positive tab 11 and negative tab 12 of the battery cell 1 can also be non-biased. In this case, the positive tab 11 in the connection assembly of multiple battery cells 1 is stacked along the thickness direction L3, and the negative tab 12 in the connection assembly of multiple battery cells 1 is stacked along the thickness direction L3. In this case, the head of the battery cell 1 no longer forms a hollow space.

[0046] In addition, the battery also includes an injection molded part 4, the heads of multiple cells 1 are connected to the injection molded part 4, multiple rigid boards 21 are covered inside the injection molded part 4, and parts of the flexible board 22 and the connector 24 are exposed outside the injection molded part 4. The injection molded part 4 can protect the battery protection board 2, the positive tab 11 and the negative tab 12.

[0047] like Figure 2 As shown, the battery also includes a protective film 6, a head adhesive tape 7, and a tail adhesive tape 8. The tail adhesive tape 8 is bonded to multiple battery cells 1 and covers and surrounds the tail of the multiple battery cells 1. The head adhesive tape 7 is bonded to the injection molded part 4 and surrounds the injection molded part 4. Two battery cells 1 located at the edge of the thickness direction L3 are defined as the first battery cell 1 and the second battery cell 1. The protective film 6 is bonded to the side of the first battery cell 1 opposite to the adhesive tape 3 in the thickness direction L3, and the protective film 6 extends to the side of the second battery cell 1 opposite to the adhesive tape 3 in the thickness direction L3. At the same time, the protective film 6 is bonded to the side of the second battery cell 1 opposite to the adhesive tape 3 in the thickness direction L3.

[0048] Taking a battery consisting of two cells 1 as an example, the battery protection board 2 includes two rigid plates 21. The deep pit surfaces of the two cells 1 are bonded together by adhesive 3, or the shallow pit surfaces of the two cells 1 are bonded together by adhesive 3. The positive tab 11 and negative tab 12 of the first cell 1 are located on one side of the width direction L2, and the positive tab 11 and negative tab 12 of the second cell 1 are located on the other side of the width direction L2. The rigid plate 21 corresponding to the first cell 1 is offset toward the side where the positive tab 11 and negative tab 12 of the first cell 1 are located, and the rigid plate 21 corresponding to the second cell 1 is offset toward the side where the positive tab 11 and negative tab 12 of the second cell 1 are located. Both the first surface S1 and the second surface S2 of the two rigid plates 21 can be used for mounting, so that the battery protection board 2 has sufficient mounting area.

[0049] According to another aspect of this application, an electronic device is provided, which includes the battery described above and has the same technical effects as the battery described above, which will not be repeated here.

[0050] Alternatively, the electronic device can be a mobile phone.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery, characterized in that, The battery includes a battery protection board and multiple battery cells. The multiple battery cells are stacked along the thickness direction of the battery cells. The battery protection board includes multiple rigid plates. The multiple rigid plates are spaced apart along the thickness direction. Two adjacent rigid plates are connected. The rigid plates are perpendicular to the length direction of the battery cells. The multiple rigid plates correspond one-to-one with the multiple battery cells. The battery cells are connected to the corresponding rigid plates.

2. The battery according to claim 1, characterized in that, The battery protection board also includes multiple components. The rigid board includes a first surface and a second surface that are opposite to each other in the length direction. The components are disposed on both the first surface and the second surface.

3. The battery according to claim 1, characterized in that, The battery cell includes an aluminum-plastic film, which comprises a deep pit surface and a shallow pit surface that are opposite to each other in the thickness direction. For any two adjacent battery cells... The pitted surface of the aluminum-plastic film in one of the battery cells faces each other, as does the pitted surface of the aluminum-plastic film in another battery cell. Alternatively, the shallow pit surface of the aluminum-plastic film in one of the battery cells faces each other with the shallow pit surface of the aluminum-plastic film in another battery cell.

4. The battery according to claim 2, characterized in that, The battery protection board also includes a flexible board and a connector, the connector being disposed on the flexible board, the flexible board being connected to the first surface of the rigid board.

5. The battery according to claim 3, characterized in that, The battery cell includes a connection assembly, which includes a positive tab and a negative tab. The positive tab and the negative tab extend from the aluminum-plastic film, and both the positive tab and the negative tab are connected to the rigid plate corresponding to the battery cell. The connecting component is located on one side of the cell in the width direction, and the connecting components in two adjacent cells are located on different sides in the width direction.

6. The battery according to claim 5, characterized in that, At least two of the plurality of rigid plates are staggered in the width direction.

7. The battery according to claim 1, characterized in that, The battery protection board also includes a connecting plate, and two adjacent rigid boards among the plurality of rigid boards are connected through the connecting plate; The connecting plate includes a first copper layer and a second copper layer, the thickness of the first copper layer being greater than the thickness of the second copper layer. The first copper layer is used to transmit current, and the second copper layer is used to transmit signals.

8. The battery according to claim 1, characterized in that, The battery cell also includes an adhesive component, through which two adjacent battery cells are connected.

9. The battery according to any one of claims 1-8, characterized in that, The battery also includes an injection molded part, the heads of the plurality of cells are all connected to the injection molded part, and the plurality of rigid plates are all encased inside the injection molded part.

10. An electronic device, characterized in that, The electronic device includes the battery according to any one of claims 1-9.

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