Battery Device

Abstract

The battery device according to the present invention includes a battery module and a printing layer. The battery module includes a frame and a plurality of battery cells disposed in the frame. The frame includes a plurality of heat dissipation slots spaced apart from each other, and transmits heat generated in at least one battery cell to the outside of the frame, allowing the battery cells to reach thermal equilibrium. The printing layer covers the frame of the battery module and is in direct contact with the heat dissipation slots.

Description

[Technical Field]

[0001] The present invention relates to an electronic device, and in particular to a battery device. This application claims priority to Korean Patent Application No. 10-2022-0175068, filed on December 14, 2022, the entire contents of which are incorporated herein by reference in their entirety. [Background technology]

[0002] Portable electronic products (e.g., laptops) use battery devices to provide necessary power. The battery devices include multiple battery cells, and each battery cell generates heat during charging and discharging, causing its temperature to rise. However, overheated battery cells are prone to wear and tear and may even explode, thereby affecting the service life of the battery cells. Summary of the Invention [Problem to be solved by the invention]

[0003] The problem to be solved by the present invention is to provide a battery device that can achieve thermal balance between battery cells and effectively extend the cycle life of the battery cells. [Means for solving the problem]

[0004] A battery device according to one aspect of the present invention includes a battery module and a printing layer. The battery module includes a frame and a plurality of battery cells disposed within the frame. The frame has a plurality of heat dissipation slots spaced apart from one another to transfer heat generated in at least one battery cell to the outside of the frame, allowing the battery cells to reach thermal balance. The printing layer covers the frame of the battery module and is in direct contact with the heat dissipation slots.

[0005] According to one aspect of the present invention, the battery cells include at least one first battery cell and at least one second battery cell, and a temperature generated in the at least one first battery cell is higher than a temperature generated in the at least one second battery cell.

[0006] According to one aspect of the present invention, the heat dissipation slot is provided to correspond to the position of at least one of the first battery cells.

[0007] According to one aspect of the present invention, each of the heat dissipation slots extends from a side edge of the frame toward the bottom surface and is L-shaped.

[0008] According to one aspect of the present invention, the frame has a thickness of 0.7 mm.

[0009] According to one aspect of the present invention, the ratio of the width to the depth (aspect ratio) of each of the heat dissipation slots is greater than 1 and is equal to or less than 2.5.

[0010] According to one aspect of the present invention, the battery module further includes a plurality of separator plates positioned within the frame to divide the frame into a plurality of receiving regions, and the battery cells are positioned within the receiving regions, respectively.

[0011] According to one aspect of the present invention, the battery device further includes a circuit board disposed on the frame of the battery module and electrically connected to the battery cells, and a protection plate disposed on the frame and covering the circuit board.

[0012] According to one aspect of the present invention, the battery device further includes a protective layer, and the battery module is located between the printed layer and the protective layer.

[0013] According to one aspect of the present invention, each of the battery cells includes a soft-pack battery cell. [Effects of the Invention]

[0014] As described above, in a battery device design according to one aspect of the present invention, the frame includes a heat dissipation slot, which transfers heat generated in at least one battery cell to the outside of the frame, thereby lowering the temperature of the battery cell and achieving thermal equilibrium between the battery cells. In other words, the heat dissipation slot allows heat to be dissipated by thermal convection, and the heat dissipation area is increased, which makes the temperatures of the battery cells the same or similar, thereby effectively extending the cycle life of the battery cells. [Brief explanation of the drawings]

[0015] [Figure 1a] 1 is an exploded perspective view of a battery device according to an embodiment of the present invention; [Figure 1b] 1b is a perspective view of a localized three-dimensional cross-section of the battery device of FIG. 1a; [Figure 1c] A local three-dimensional cross-sectional perspective view of Figure 1b seen from another perspective. [Figure 1d] FIG. 1b is a perspective view of a local three-dimensional cross section of the frame of FIG. 1a. [Figure 2] FIG. 10 is an exploded perspective view of a battery device according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] In order that the above features and advantages of the present invention may be more readily understood, the following detailed description, taken as an example only, of the preferred embodiments with reference to the accompanying drawings.

[0017] The present invention can be understood by referring to the following detailed description and drawings, and it should be noted that in order to facilitate understanding of the present invention and simplify the drawings, the components in the drawings are not drawn to scale, and the number and size of each component in the drawings are for illustrative purposes only and do not limit the scope of the present invention.

[0018] Fig. 1a is an exploded perspective view of a battery device according to one embodiment of the present invention. Fig. 1b is a local, cross-sectional perspective view of the battery device of Fig. 1a. Fig. 1c is a local, cross-sectional perspective view of Fig. 1b seen from another perspective. Fig. 1d is a local, cross-sectional perspective view of the frame of Fig. 1a. For convenience of explanation, the printing layer of Fig. 1b is omitted in Fig. 1c.

[0019] 1a, in this embodiment, a battery device 100a is a battery device utilized in, for example, a laptop or other type of electronic product, and includes a battery module 110a and a printed layer 120a. The battery module 110a includes a frame 111a and a plurality of battery cells (three battery cells 112 are shown as an example) disposed within the frame 111a. The frame 111a includes a plurality of heat dissipation slots 113 spaced apart from one another to transfer heat generated in at least one battery cell 112 to the outside of the frame 111a, allowing the battery cells 112 to reach thermal equilibrium. The printed layer 120a covers the frame 111a of the battery module 110a and is in direct contact with the heat dissipation slots 113.

[0020] More specifically, in this embodiment, the battery module 110a further includes a plurality of separator plates 115a, which are located within the frame 111a and divide the frame 111a into a plurality of receiving areas (for example, three receiving areas A), and the battery cells 112 are located within the receiving areas A. In one embodiment, the battery cells 112 are soft-pack battery cells, but are not limited thereto. Furthermore, the battery cells 112 according to this embodiment include at least one first battery cell (two first battery cells 114 are shown as an example) and at least one second battery cell (one second battery cell 116 is shown as an example), and the temperature generated during charging and discharging of the first battery cell 114 is higher than the temperature generated during charging and discharging of the second battery cell 116.

[0021] 1b, 1c, and 1d, in this embodiment, the heat dissipation slot 113 is a slot hole that penetrates the frame 111a. The heat dissipation slot 113 extends from the side edge S of the frame 111a to the bottom surface U, forming an L shape. That is, airflow within the frame 111a is transferred to the outside of the frame 111a through the heat dissipation slot 113. As shown in FIGS. 1a and 1b, the heat dissipation slot 113 according to this embodiment is provided on the side edge S of the frame 111a to correspond to the position of the first battery cell 114. The first battery cell 114 located within the frame 111a is in direct contact with the heat dissipation slot 113. The heat dissipation slot 113 connects the printed layer 120 to the interior of the frame 111a, so that heat from the first battery cell 114 is transferred to the printed layer 120 by thermal convection.

[0022] Simply put, the heat dissipation slots 113 according to this embodiment are provided corresponding to the first battery cell 114, which has a higher temperature, and no heat dissipation slots 113 are provided around the second battery cell 116, which has a lower temperature. Therefore, the heat dissipation slots 113 transfer the heat generated in the first battery cell 114 to the outside of the frame 111a by thermal convection, thereby lowering the temperature of the first battery cell 114 (e.g., by 2.35°C), so that the temperature of the first battery cell 114 reaches thermal equilibrium with the temperature of the second battery cell 116.

[0023] 1b to 1d, in one embodiment, the thickness T of the frame 111a is, for example, 0.7 mm, and the ratio of the width to the depth of each heat dissipation slot 113 is greater than 1 and not greater than 2.5. In one embodiment, the depth D of each heat dissipation slot 113 is, for example, 0.2 mm, and the width W of each heat dissipation slot 113 is, for example, 0.5 mm. In this embodiment, the heat dissipation slots 113 are provided only on the side S of the frame 111a, but in other embodiments, the heat dissipation slots 113 can be provided on two or three side edges of the corresponding battery cells 112 according to the heat dissipation needs, all of which are within the scope of protection of the present invention.

[0024] 1a, the battery device 100a according to this embodiment includes a circuit board 130 and a protective plate 140. The circuit board 130 is disposed on the frame 111a of the battery module 110a and electrically connects to the battery cells 112. The protective plate 140 is disposed on the frame 111a and covers and protects the circuit board 130. In one embodiment, the frame 111a and the protective plate 140 may be made of plastic. The battery device 100a also includes a protective layer 150, and the battery module 110a is positioned between the printed layer 120a and the protective layer 150. Here, the protective layer 150 is a single-color sheet material that is disposed on the bottom surface U of the frame 111a and covers the battery module 110a together with the printed layer 120a. The printed layer 120a may include text or an image and display information such as the model name of the battery device 100a; therefore, the printed layer 120a may also be considered a label layer.

[0025] In brief, the frame 111a according to this embodiment includes heat dissipation slots 113. The provision of the heat dissipation slots 113 improves cooling conditions and increases the heat dissipation area of the battery cells 112. Heat generated in the hot battery cells 112 is transferred to the outside of the frame 111a by thermal convection, thereby lowering the temperature of the battery cells 112 and achieving thermal equilibrium between the battery cells 112. Therefore, the temperatures between the battery cells 112 of the battery device 100a according to this embodiment become uniform or similar, effectively extending the cycle life of the battery cells 112. Furthermore, the provision of the heat dissipation slots 113 on the frame 111a can further simplify the heat dissipation control system of the battery device 100a and reduce the amount of insulating material used.

[0026] Here, the following embodiments are based on the drawing numbers and some of the contents of the above embodiment, and it should be clearly stated that the same or similar components are indicated by the same drawing numbers and the description of the same technical contents is omitted. For the omitted parts, you may refer to the above embodiment, and the following embodiments will not be redundantly described.

[0027] FIG. 2 is an exploded perspective view of a battery device according to another embodiment of the present invention. Referring to FIGS. 1A and 2, a battery device 100b according to this embodiment is similar to the battery device 100a of FIG. 1A, except that in this embodiment, a frame 111b of a battery module 110b separates four accommodating spaces B by a separator 115b, and four battery cells 112 are located in the accommodating spaces B, respectively. Heat dissipation slots 113 are provided corresponding to each battery cell 112, and the hotter battery cells 112 correspond to multiple heat dissipation slots 113, thereby achieving thermal equilibrium between the battery cells 112 and effectively extending the cycle life of the battery cells 112. The number of heat dissipation slots 113 can be determined based on the heat dissipation demand of the battery cells 112 and the length of the frame 111b. A larger number and higher density of heat dissipation slots 113 can be provided for the hotter battery cells 112.

[0028] As described above, in the design of the battery device according to the present invention, the frame is provided with a heat dissipation slot, which transfers heat generated in at least one battery cell to the outside of the frame, thereby lowering the temperature of the battery cell and achieving thermal equilibrium between the battery cells. In other words, by providing the heat dissipation slot, heat is dissipated by heat convection, and by increasing the heat dissipation area, the temperatures between the battery cells are made uniform or similar, thereby effectively extending the cycle life of the battery cells.

[0029] The present invention has been described above through examples, but is not limited thereto. Those skilled in the art can make appropriate changes and modifications without departing from the spirit and scope of the present invention, and the scope of protection of the present invention is determined by the claims. [Explanation of symbols]

[0030] 100a, 100b: Battery device 110a, 110b: battery modules 111a, 111b: Frame 112: Battery cell 113: Heat dissipation slot 114: 1st battery cell 115a, 115b: Separation plate 116: Second battery cell 120a, 120b: Printing layer 130: Circuit board 140: Protective plate 150: Protective layer A: Containment Area D: Depth L: Width S: Side T: Thickness U: Bottom W: Slot width

Claims

1. a battery module including a frame and a plurality of battery cells disposed within the frame, the frame having a plurality of heat dissipation slots spaced apart from one another to transfer heat generated in at least one of the battery cells to the outside of the frame so that the battery cells reach thermal equilibrium; a printing layer covering the frame of the battery module and directly connecting with the heat dissipation slot; the battery cell is in direct contact with the heat dissipation slot; A battery device, characterized in that the heat dissipation slots communicate between the printed layer and the inside of the frame.

2. The battery cell at least one first battery cell; at least one second battery cell; 2. The battery device according to claim 1, wherein a temperature generated in at least one of the first battery cells is higher than a temperature generated in at least one of the second battery cells.

3. The battery device according to claim 2 , wherein the heat dissipation slot is provided to correspond to the position of at least one of the first battery cells.

4. A battery module including a frame and a plurality of battery cells arranged within the frame, the frame having a plurality of heat dissipation slots spaced apart from each other, which transfer heat generated in at least one of the battery cells to the outside of the frame so that the battery cells reach thermal equilibrium; a printing layer covering the frame of the battery module and directly connecting with the heat dissipation slot; The battery device, wherein each of the heat dissipation slots extends from a side edge of the frame toward the bottom surface and has an L-shape.

5. 2. The battery device according to claim 1, wherein the frame has a thickness of 0.7 mm.

6. The battery device according to claim 5, wherein the ratio of the width to the depth of each heat dissipation slot is greater than 1 and less than or equal to 2.

5.

7. 2. The battery device according to claim 1, wherein the battery module further includes a plurality of separator plates positioned within the frame to divide the frame into a plurality of receiving regions, and the battery cells are respectively positioned within the receiving regions.

8. a circuit board disposed on the frame of the battery module and electrically connected to the battery cells; a protection plate disposed on the frame to cover the circuit board; 10. The battery device of claim 1, further comprising:

9. The battery device according to claim 1 , further comprising a protective layer, wherein the battery module is located between the printing layer and the protective layer.

10. The battery device of claim 1 , wherein each of the battery cells comprises a soft-pack battery cell.

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