Battery and terminal device containing the battery

Abstract

A battery (100) and a terminal device having the battery (100) are provided. The battery (100) includes a cell assembly (1) and a protection plate (2). The cell assembly (1) has a first end (16) and a second end (17) arranged opposite to each other along its length. The protection plate (2) includes a body (21) and a thickened portion (22). The protection plate (2) is disposed at the first end (16) of the cell assembly (1). The body (21) has a first surface (13) and a second surface (14) arranged opposite to each other along the thickness direction of the cell assembly (1). The thickened portion (22) is disposed on the first surface (13). Therefore, the battery (100) has the advantage of improving the current carrying capacity and heat dissipation performance of the protection plate (2).

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more specifically, to a battery and a terminal device having the battery. Background Technology

[0002] A circuit protection board (PCM board) is used to protect series-connected lithium battery packs from over-discharge, overcharge, overcurrent, and output short circuits. However, in related technologies, the space on the PCM board is insufficient to accommodate dense electronic components and wiring, resulting in weak current carrying capacity and a small system heat dissipation area. Summary of the Invention

[0003] This disclosure aims to at least partially address one of the technical problems in the related art. To this end, embodiments of this disclosure provide a battery and a terminal device having the battery. The battery has the advantages of improving the current carrying capacity of the protection board and its heat dissipation performance.

[0004] Embodiments of this disclosure also propose a terminal device.

[0005] The battery in this embodiment includes a cell assembly and a circuit protection board.

[0006] The battery cell assembly has a first end and a second end arranged opposite to each other in its length direction. The circuit protection board includes a body and a thickening portion. The circuit protection board is disposed at the first end of the battery cell assembly. The body has a first surface and a second surface arranged opposite to each other in the thickness direction of the battery cell assembly. The thickening portion is disposed on the first surface. The dimension of the body in a predetermined direction is larger than the dimension of the thickening portion in the predetermined direction so that the circuit protection board forms a clearance portion in the thickness direction of the battery cell assembly.

[0007] The battery of this embodiment increases the current carrying capacity of the protection board by providing a thickened portion on the body of the circuit protection board. This thickened portion increases the size of the circuit protection board in the thickness direction of the cell assembly (increasing the size of the circuit protection board in the thickness direction of the cell assembly increases its current carrying capacity and conductivity), thereby improving the fast charging performance of the battery. Furthermore, the thickened portion also increases the heat dissipation area of ​​the circuit protection board, thereby improving the heat dissipation performance of the battery during operation.

[0008] Therefore, the battery of the present disclosure embodiment has the advantages of improving the current carrying capacity and heat dissipation performance of the protection board.

[0009] In some embodiments, the dimension of the circuit protection board in the width direction of the battery cell assembly is less than or equal to the width of the battery cell assembly.

[0010] In some embodiments, the dimension of the body in the width direction of the cell assembly is larger than the dimension of the thickened portion in the width direction of the cell assembly, so that the circuit protection board forms a clearance portion in the thickness direction of the cell assembly.

[0011] In some embodiments, the sum of the dimension of the body in the thickness direction of the cell assembly and the dimension of the thickened portion in the thickness direction of the cell assembly is less than the thickness of the cell assembly.

[0012] In some embodiments, the cell assembly includes a first set of electrode sheets and a second set of electrode sheets, the first set of electrode sheets and the second set of electrode sheets are stacked along the thickness direction of the cell assembly, the first set of electrode sheets and the second set of electrode sheets form a step in the width direction of the cell assembly, and the body is connected to at least one of the first set of electrode sheets and the second set of electrode sheets.

[0013] In some embodiments, the width of the first set of electrode sheets is smaller than the width of the second set of electrode sheets, the length of the first set of electrode sheets is equal to the length of the second set of electrode sheets, and one end of the first set of electrode sheets in its length direction is aligned with one end of the second set of electrode sheets in its length direction in the length direction of the cell assembly, and the dimension of the body in the width direction of the cell assembly is smaller than the width of the second set of electrode sheets.

[0014] In some embodiments, one end of the first set of electrodes in its width direction is aligned with one end of the second set of electrodes in its width direction in the width direction of the cell assembly.

[0015] In some embodiments, the first group of electrodes has a first electrode adjacent to the second group of electrodes, and the second group of electrodes has a second electrode adjacent to the first group of electrodes, each of the first electrode and the second electrode being a single-sided positive electrode; or, the first electrode is a double-sided positive electrode and the second electrode is a double-sided negative electrode.

[0016] In some embodiments, the second electrode is the double-sided negative electrode, which includes a foil layer and a first active layer and a second active layer disposed on both sides of the foil layer. The first active layer is connected to the positive electrode of the first group of electrodes, and the area of ​​the first active layer is greater than or equal to the area of ​​the first electrode.

[0017] In some embodiments, the battery further includes electronic devices, which include connectors and components, the connectors being connected to the components, and the connectors being disposed within the first surface.

[0018] The terminal device of this disclosure embodiment may include the battery described in any of the above embodiments. Attached Figure Description

[0019] Figure 1 This is a perspective view of a battery according to an embodiment of the present disclosure.

[0020] Figure 2 yes Figure 1 A magnified view of point A in the image.

[0021] Figure 3 This is another perspective view of a battery according to an embodiment of the present disclosure.

[0022] Figure 4 This is another perspective view of the battery according to an embodiment of the present disclosure.

[0023] Figure 5 This is a cross-sectional view of the two positive electrode plates disclosed in this paper.

[0024] Figure 6 This is a cross-sectional view of a double-sided negative electrode.

[0025] Figure 7 This is a cross-sectional view of another bifacial negative electrode sheet disclosed herein.

[0026] Figure label:

[0027] Battery 100;

[0028] Battery cell assembly 1; first group of electrode plates 11; second group of electrode plates 12; first surface 13; second surface 14; step 15; first end 16; second end 17;

[0029] Circuit protection board 2; Body 21; Thickened part 22; Clearance part 23;

[0030] Connector 3;

[0031] 4. Electronic components. Detailed Implementation

[0032] Embodiments of this disclosure are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting it.

[0033] The following is for reference. Figures 1-7 Battery 100 according to an embodiment of this disclosure.

[0034] The battery 100 of this embodiment includes a cell assembly 1 and a circuit protection board 2.

[0035] The battery cell assembly 1 has a first end 16 and a second end 17 arranged opposite to each other in its length direction. The circuit protection plate 2 includes a body 21 and a thickened portion 22. The circuit protection plate 2 is disposed at the first end 16 of the battery cell assembly 1. The body 21 has a first surface 13 arranged opposite to each other in the thickness direction of the battery cell assembly 1 (e.g., ...). Figure 1 (upper middle side) and second side 14 (e.g., Figure 2 (Lower middle side), the thickened portion 22 is provided on the first surface 13, and the size of the body 21 in a preset direction (for example, the preset direction may be the width direction or the length direction of the cell assembly 1) is greater than the size of the thickened portion 22 in the preset direction so that the circuit protection plate 2 forms an avoidance portion 23 in the thickness direction of the cell assembly 1.

[0036] The battery 100 of this embodiment increases the current carrying capacity of the protection board by providing a thickened portion 22 on the body 21 of the circuit protection board 2. This increases the size of the circuit protection board 2 in the thickness direction of the cell assembly 1 (increasing the size of the circuit protection board 2 in the thickness direction of the cell assembly 1 increases its current carrying capacity and conductivity), thereby improving the fast charging performance of the battery 100. Furthermore, the thickened portion 22 also increases the heat dissipation area of ​​the circuit protection board 2, thereby improving the heat dissipation performance of the battery 100 during operation.

[0037] Therefore, the battery 100 of the present disclosure has the advantages of improving the current carrying capacity and heat dissipation performance of the protection board.

[0038] For ease of description, the following will be Figure 1 The vertical direction is used as the height direction of the battery 100 in this embodiment of the disclosure. Figure 1 The left and right directions in the middle are used as the width direction of cell assembly 1. Figure 1 The front-to-back direction is taken as the length direction of the cell assembly 1.

[0039] like Figure 1 and Figure 2 As shown, the dimension of the circuit protection board 2 in the width direction of the cell assembly 1 is less than or equal to the width of the cell assembly 1. In other words, the thickened portion 22 is provided on the upper surface of the body 21, and the dimensions of both the body 21 and the thickened portion 22 in the width direction of the cell assembly 1 are less than or equal to the width of the cell assembly 1.

[0040] In this embodiment of the battery 100, the dimension of the body 21 in the width direction of the cell assembly 1 is less than or equal to the length of the cell assembly 1. Given a fixed width of the battery compartment, this avoids installation interference caused by an excessively large dimension of the circuit protection board 2 in the width direction of the cell assembly 1. This improves the structural rationality of the battery 100.

[0041] like Figure 1 and Figure 2As shown, the dimension of the main body 21 in the width direction of the cell assembly 1 is larger than the dimension of the thickened portion 22 in the width direction of the cell assembly 1, so that the circuit protection board 2 forms an avoidance portion 23 in the thickness direction of the cell assembly 1.

[0042] The battery 100 of this embodiment has a clearance portion 23 formed in the body 21 and the thickened portion 22 in the thickness direction of the cell assembly 1. This clearance portion 23 allows components to be arranged within it, preventing components on the circuit protection board 2 from protruding beyond the surface of the battery 100 in the thickness direction due to excessive thickness of the body 21. This also prevents components from occupying space in the battery compartment thickness direction of the battery 100 due to excessive size of the circuit protection board 2 in the thickness direction of the cell assembly 1. Therefore, the battery 100 of this embodiment has the advantage of a rational battery structure.

[0043] like Figure 1 and Figure 2 As shown, the sum of the dimensions of the main body 21 in the thickness direction of the cell assembly 1 and the dimensions of the thickened portion 22 in the thickness direction of the cell assembly 1 is less than the thickness of the cell assembly 1.

[0044] The battery 100 of this embodiment can, according to actual conditions, arrange components with larger dimensions in the thickness direction of the cell assembly 1 within the clearance portion 23. This reduces the impact of the components on the thickness of the circuit protection board 2 while ensuring that the thickness of the circuit protection board 2 remains unchanged. This further enhances the current carrying capacity and heat dissipation performance of the protection board.

[0045] like Figure 1 and Figure 3 As shown, the battery cell assembly 1 includes a first set of electrode sheets 11 and a second set of electrode sheets 12. The first set of electrode sheets 11 and the second set of electrode sheets 12 are stacked along the thickness direction of the battery cell assembly 1. The first set of electrode sheets 11 and the second set of electrode sheets 12 form a step 15 in the width direction of the battery cell assembly 1. The body 21 is connected to at least one of the first set of electrode sheets 11 and the second set of electrode sheets 12.

[0046] The portion of the terminal device used to house the battery cell assembly 1 has related components (e.g., a curved screen) that can cause installation interference with the battery cell assembly 1. Typically, the overall thickness of the battery 100 is reduced by decreasing the number of electrode plates to avoid interference between the battery cell assembly 1 and the related components. However, reducing the number of electrode plates results in lower battery capacity and lower space utilization of the terminal device.

[0047] The battery 100 of this embodiment, by forming a step 15 between the first set of electrode plates 11 and the second set of electrode plates 12 in the width direction of the cell assembly 1, can reduce the number of electrode plates while avoiding interference with related components. Therefore, the terminal device of this embodiment has the advantage of high battery capacity. Furthermore, since the number of electrode plates is not reduced, the cell assembly 1 can occupy as much space as possible in the battery compartment of the battery 100, thus improving the space utilization rate of the battery compartment. Therefore, the battery 100 of this embodiment has the advantages of improved space utilization and increased battery capacity.

[0048] Specifically, the thickened portion 22 is provided corresponding to the first group of electrode sheets 11, and the body 21 is provided corresponding to the second group of electrode sheets 12.

[0049] like Figure 1 and Figure 3 As shown, the width of the first set of electrode sheets 11 is smaller than the width of the second set of electrode sheets 12, the length of the first set of electrode sheets 11 is equal to the length of the second set of electrode sheets 12, and one end of the first set of electrode sheets 11 in its length direction is aligned with one end of the second set of electrode sheets 12 in its length direction along the length direction of the cell assembly 1. The dimension of the body 21 in the width direction of the cell assembly 1 is smaller than the width of the second set of electrode sheets 12. In other words, the step 15 is formed on the left and / or right side of the cell assembly 1, and the cell assembly 1 has a flat surface at the first end 16 and the second end 17.

[0050] The battery 100 of this embodiment can avoid the installation of curved screens by providing a step 15 in the width direction of the cell assembly 1, which has the advantage of further increasing the capacity of the battery 100.

[0051] For example, one end of the first set of electrode sheets 11 in its width direction and one end of the second set of electrode sheets 12 in its width direction are aligned in the width direction of the cell assembly 1. In other words, the step 15 is formed on the left or right side of the cell assembly 1. Generally, the battery 100 may be set close to one side (left or right) of the curved screen. The step 15 can be set on one side of the cell assembly 1 according to the need for avoidance, which improves the rationality of the battery 100 structure and helps to optimize the space of the battery compartment.

[0052] like Figure 5 and Figure 6 As shown, the first group of electrode plates 11 has a first electrode plate adjacent to the second group of electrode plates 12, and the second group of electrode plates 12 has a second electrode plate adjacent to the first group of electrode plates 11. Each of the first electrode plate and the second electrode plate is a single-sided positive electrode plate; or, the first electrode plate is a double-sided positive electrode plate and the second electrode plate is a double-sided negative electrode plate.

[0053] The battery 100 of this embodiment has the advantage of facilitating electrode stacking by aligning one end of the first set of electrode sheets 11 in its width direction with one end of the second set of electrode sheets 12 in its width direction in a predetermined direction. Furthermore, it improves the ease of installation of the battery 100 having this cell assembly 1.

[0054] like Figure 5 As shown, the first group of electrodes 11 has a first electrode adjacent to the second group of electrodes 12, and the second group of electrodes 12 has a second electrode adjacent to the first group of electrodes 11. Each of the first and second electrodes is a single-sided positive electrode. In other words, the first electrode in the first group of electrodes 11 is connected to the second electrode in the second group of electrodes 12. It should be noted that the double-sided negative electrode includes a separator and negative active layers coated on both sides of the separator; the double-sided positive electrode includes a separator and positive active layers coated on both sides of the separator.

[0055] The battery 100 of this disclosure is not limited thereto. For example, in some other embodiments, the first group of electrode plates 11 has a first electrode plate adjacent to the second group of electrode plates 12, the second group of electrode plates 12 has a second electrode plate adjacent to the first group of electrode plates 11, and the first electrode plate is a double-sided positive electrode plate, for example... Figure 6 and 7 As shown, the second electrode is a double-sided negative electrode.

[0056] The battery 100 of this embodiment uses a first electrode that is a double-sided positive electrode and a second electrode that is a double-sided negative electrode. While both the first and second electrodes are provided with single-sided positive electrodes, it is essentially equivalent to a single double-sided positive electrode. However, the thickness of the two single-sided positive electrode layers is equal to the thickness of the two separator layers plus the thickness of the two active layers. For example, Figure 5 As shown, the thickness of the two single-sided positive electrode sheets H1 is equal to the thickness of two double-layer active layers H2 plus the thickness of two separators H3, i.e., H1 equals 2H2 + 2H3. The thickness of the double-sided positive electrode sheet is equal to the thickness of one separator plus the thickness of two active layers. Given the same number of layers in the cell assembly 1, the battery 100 of this embodiment has the advantage of further space saving. Therefore, with a fixed battery compartment space, the battery 100 of this embodiment has the advantage of a large capacity in the cell assembly 1.

[0057] like Figure 5 and Figure 7 As shown, the second electrode is a double-sided negative electrode. The double-sided negative electrode includes a foil layer and a first active layer and a second active layer disposed on both sides of the foil layer. The first active layer is connected to the positive electrode 1 of the first group of electrodes 11, and the area of ​​the first active layer is equal to the area of ​​the first electrode.

[0058] like Figure 1 and Figure 3As shown, the battery 100 also includes electronic components, including connector 3 and component 4. Connector 3 is connected to component 4 and is located in the first surface.

[0059] The terminal device of this disclosure embodiment may include the battery described in any of the above embodiments. Therefore, the terminal device of this disclosure embodiment has the advantages of improving the current carrying capacity and heat dissipation performance of the protection board.

[0060] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "longitudinal," "radial," and "circumferential" 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 disclosure 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 disclosure.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0063] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of this disclosure.

Claims

1. A battery, characterized by, include: A battery cell assembly having a first end and a second end arranged opposite to each other in its length direction; A circuit protection board, comprising a body and a thickening portion, wherein the circuit protection board is disposed at the first end of the battery cell assembly, the body having a first surface and a second surface disposed opposite to each other in the thickness direction of the battery cell assembly, the thickening portion being disposed on the first surface, and the dimension of the body in a predetermined direction being larger than the dimension of the thickening portion in the predetermined direction so that the circuit protection board forms an avoidance portion in the thickness direction of the battery cell assembly. The battery cell assembly includes a first set of electrode sheets and a second set of electrode sheets. The first set of electrode sheets and the second set of electrode sheets are stacked along the thickness direction of the battery cell assembly. The first set of electrode sheets and the second set of electrode sheets form a step in the width direction of the battery cell assembly. The thickened portion is correspondingly provided with the first set of electrode sheets. The body is connected to the second set of electrode sheets.

2. The battery of claim 1, wherein, The dimension of the circuit protection board in the width direction of the battery cell assembly is less than or equal to the width of the battery cell assembly.

3. The battery of claim 2, wherein, The dimension of the body in the width direction of the battery cell assembly is larger than the dimension of the thickened portion in the width direction of the battery cell assembly, so that the circuit protection board forms a clearance portion in the thickness direction of the battery cell assembly.

4. The battery of claim 3, wherein, The sum of the dimensions of the main body in the thickness direction of the battery cell assembly and the dimensions of the thickened portion in the thickness direction of the battery cell assembly is less than the thickness of the battery cell assembly.

5. The battery of claim 1, wherein, The width of the first set of electrode sheets is smaller than the width of the second set of electrode sheets, the length of the first set of electrode sheets is equal to the length of the second set of electrode sheets, and one end of the first set of electrode sheets in its length direction is aligned with one end of the second set of electrode sheets in its length direction in the length direction of the cell assembly. The dimension of the body in the width direction of the cell assembly is smaller than the width of the second set of electrode sheets.

6. The battery of claim 5, wherein, The first set of electrode plates is aligned at one end in its width direction with the second set of electrode plates at one end in its width direction in the width direction of the cell assembly.

7. The battery of claim 1, wherein, The first group of electrode sheets has a first electrode sheet adjacent to the second group of electrode sheets, and the second group of electrode sheets has a second electrode sheet adjacent to the first group of electrode sheets. Each of the first electrode sheet and the second electrode sheet is a single-sided positive electrode sheet. Alternatively, the first electrode may be a double-sided positive electrode and the second electrode may be a double-sided negative electrode.

8. The battery according to claim 7, characterized in that, The second electrode is the double-sided negative electrode, which includes a foil layer and a first active layer and a second active layer disposed on both sides of the foil layer. The first active layer is connected to the positive electrode of the first group of electrodes, and the area of ​​the first active layer is greater than or equal to the area of ​​the first electrode.

9. The battery according to any one of claims 1-4, characterized in that, It also includes electronic devices, which include connectors and components, with the connectors connected to the components and the connectors disposed within the first surface.

10. A terminal device, characterized in that, Includes the battery according to any one of claims 1-9.

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