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 in the specification and drawings. [Background technology]

[0002] A portable electronic product (e.g., a laptop) includes a battery device to provide necessary power. The battery device includes a number of battery cells, and each battery cell generates heat and its temperature rises when it is charged or discharged. However, the battery cells in an overheated state are easily consumed and may explode, which affects the service life of the battery cells. Summary of the Invention [Problem to be solved by the invention]

[0003] An object of the present invention is to provide a battery device that can achieve thermal balance between battery cells to 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 includes a plurality of heat dissipation slots spaced apart from each other, and is adapted to transfer heat generated in at least one battery cell out of the frame and allow 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 a 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 toward the bottom surface on a side of the frame and is L-shaped.

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

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

[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 connecting with 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 printing 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. Effect of the Invention

[0014] As described above, in the design of the battery device 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 is provided to dissipate heat by thermal convection, and the heat dissipation area is increased to make the temperatures of the battery cells the same or similar, thereby effectively extending the cycle life of the battery cells. [Brief description 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] FIG. 1b is a perspective view of a localized three-dimensional cross-section of the battery device of FIG. [Figure 1c] FIG. 1b is a local three-dimensional cross-sectional perspective view seen from another viewpoint. [Figure 1d] FIG. 1b is a perspective view of a local three-dimensional cross-section of the frame of FIG. [Diagram 2] FIG. 13 is an exploded perspective view of a battery device according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] In order to make the present invention more easily comprehensible with respect to the above features and advantages, the following detailed description is given by way of example 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 illustrative and do not limit the scope of the present invention.

[0018] Fig. 1a is an exploded perspective view of a battery device according to an 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 from another viewpoint. 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, the battery device 100a is a battery device used in, for example, a notebook computer or other types of electronic products, 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 in the frame 111a. The frame 111a includes a plurality of heat dissipation slots 113 spaced apart from each other, which transfer heat generated in at least one battery cell 112 to the outside of the frame 111a, so that the battery cell 112 reaches 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] In detail, in this embodiment, the battery module 110a further includes a plurality of separation plates 115a, which are located in the frame 111a to divide the frame 111a into a plurality of receiving areas (for example, three receiving areas A), and the battery cells 112 are located in the receiving areas A. In one embodiment, the battery cells 112 are soft-pack battery cells, but are not limited thereto. In addition, 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), among which, 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 the present embodiment, the heat dissipation slot 113 is a slot hole penetrating the frame 111a, and the heat dissipation slot 113 extends from the side S of the frame 111a to the bottom U, forming an L-shape. That is, the airflow in the frame 111a is transferred to the outside of the frame 111a through the heat dissipation slot 113. As shown in FIG. 1a and FIG. 1b, the heat dissipation slot 113 according to the present embodiment is provided to correspond to the position of the first battery cell 114 and provided on the side S of the frame 111a. Among them, the first battery cell 114 located in the frame 111a is in direct contact with the heat dissipation slot 113. Since the heat dissipation slot 113 communicates with the inside of the printed layer 120 and the frame 111a, the heat of the first battery cell 114 is transferred to the printed layer 120 by the method of thermal convection.

[0022] In short, the heat dissipation slots 113 according to the present embodiment are provided in correspondence with the first battery cell 114 having a high temperature, and no heat dissipation slots 113 are provided around the second battery cell 116 having a low 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 to lower the temperature of the first battery cell 114 (e.g., by 2.35° C.), thereby allowing the temperature of the first battery cell 114 to reach 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 less than or equal to 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 sides of the corresponding battery cell 112 according to the heat dissipation demand, which all fall within the protection scope of the present invention.

[0024] 1a, the battery device 100a according to the present 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 with the battery cells 112. The protective plate 140 is disposed on the frame 111a, covers the circuit board 130, and protects the circuit board 130. In one embodiment, the material of the frame 111a and the material of the protective plate 140 may be plastic. The battery device 100a also includes a protective layer 150, and the battery module 110a is located between the printed layer 120a and the protective layer 150. Here, the protective layer 150 is a single-colored sheet material, 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 may display information such as the model name of the battery device 100a, and therefore the printed layer 120a may also be considered as a label layer.

[0025] In short, the frame 111a according to the present embodiment includes the heat dissipation slots 113, and the provision of the heat dissipation slots 113 can improve the cooling conditions and increase the heat dissipation area of ​​the battery cells 112, and the heat generated in the high-temperature 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 the present embodiment become the same or similar, and the cycle life of the battery cells 112 can be effectively extended. In addition, 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 can reduce the amount of heat insulating material used.

[0026] Here, the following embodiment is based on the drawing reference numbers and some contents of the above embodiment, among which the same or similar components are indicated by the same drawing reference numbers, and it should be clearly stated that the description of the same technical contents is omitted. The omitted parts can be referred to the above embodiment, and the following embodiment does not redundantly describe them.

[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, the battery device 100b according to this embodiment is similar to the battery device 100a of FIG. 1a, and the difference between the two is that in this embodiment, the frame 111b of the battery module 110b separates four accommodating spaces B by a separation plate 115b, and the four battery cells 112 are located in the accommodating spaces B. Here, the heat dissipation slots 113 are provided corresponding to each battery cell 112, and the battery cell 112 with a higher temperature corresponds to a plurality of heat dissipation slots 113, so that the battery cells 112 reach thermal equilibrium, and the cycle life of the battery cells 112 can be effectively extended. The number of heat dissipation slots 113 can be determined according to the heat dissipation demand of the battery cells 112 and the length of the frame 111b, and the battery cell 112 with a higher temperature can be provided with a large number and high density of heat dissipation slots 113.

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

[0029] The present invention is 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 module 111a, 111b: Frame 112: Battery cell 113: Heat dissipation slot 114: First battery cell 115a, 115b: Separation plate 116: Second battery cell 120a, 120b: Printing layer 130: Circuit board 140:Protection 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 each other, for transferring 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; A battery device comprising:

2. The battery cell includes: at least one first battery cell; at least one second battery cell; 2. The battery device of claim 1, wherein a temperature occurring in at least one of the first battery cells is higher than a temperature occurring 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 a position of at least one of the first battery cells.

4. The battery device according to claim 1 , wherein each of the heat dissipation slots extends downward from a side of the frame 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 accommodating regions, and the battery cells are each positioned within the accommodating 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, the battery module being located between the printing layer and the protective layer.

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

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