Heat dissipation structure of battery pack

Abstract

The utility model discloses a heat dissipation structure of a battery pack, which comprises a shell of the battery pack, and a heat dissipation structure close to a control panel of the battery pack is arranged on the shell; the heat dissipation structure comprises an inner heat absorption part and an outer heat dissipation part, the inner heat absorption part is located on the inner side of the shell, the outer heat dissipation part is located on the outer side of the shell, and the inner heat absorption part is in heat conduction connection with the outer heat dissipation part. The inner heat absorption part is close to a control panel of the battery pack and is attached to the inner shell surface of the shell; and the outer heat dissipation part and the shell are integrally formed. Heat is dissipated through the outer heat dissipation part after heat is absorbed through the inner heat absorption part of the heat dissipation structure, so that the heat dissipation timeliness and efficiency can be improved, and the service lives of the battery cells and the control panel of the battery pack are prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and in particular relates to a heat dissipation structure of a battery pack. Background Art

[0002] The battery pack of an electric bicycle is a crucial component, providing the power source. Lithium iron phosphate batteries are popular in the market due to their excellent cycle performance and safety. During charging and discharging, the battery cells and control board easily generate heat, posing a safety hazard to the battery pack. If the heat is not dissipated promptly or accumulates, it can also shorten the service life of the battery cells and control board. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a heat dissipation structure for a battery pack, which absorbs heat through the internal heat absorption part of the heat dissipation structure and then dissipates it through the external heat dissipation part, thereby improving the timeliness and efficiency of heat dissipation and extending the service life of the battery cells and control board of the battery pack.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a heat dissipation structure of a battery pack, comprising a battery pack housing, on which a heat dissipation structure close to a control board of the battery pack is provided;

[0005] The heat dissipation structure includes an inner heat absorption part and an outer heat dissipation part, wherein the inner heat absorption part is located on the inner side of the shell, and the outer heat dissipation part is located on the outer side of the shell, and the inner heat absorption part and the outer heat dissipation part are connected to each other by heat conduction.

[0006] Furthermore, the inner heat absorbing portion is close to the control board of the battery pack and fits with the inner shell surface of the outer shell, and the outer heat dissipating portion is integrally formed with the outer shell.

[0007] Furthermore, the heat dissipation structure is close to the control board located at the top of the battery pack, so that the inner heat absorption part is located on the inner top surface of the shell, and the outer heat dissipation part is located on the outer top surface of the shell.

[0008] Furthermore, in a top view of the battery pack, the distribution area of ​​the inner heat absorption portion and the distribution area of ​​the outer heat dissipation portion both cover the structural outline of the control board at the top of the battery pack.

[0009] Furthermore, the outer shell is a structure of front and rear half shells being spliced ​​together, and the inner heat absorbing part and the outer heat dissipating part are respectively formed into two independent front and rear halves with the splicing connection of the outer shell as the boundary.

[0010] Furthermore, the inner heat absorption part is a heat absorption plate that is bonded and connected to the inner fixed surface of the outer shell.

[0011] Furthermore, the external heat dissipation portion includes a grid structure arranged side by side.

[0012] Furthermore, heat dissipation ducts are formed between adjacent grid structures.

[0013] Furthermore, the top of the heat dissipation duct and the side facing away from the splicing position of the shell are both open structures.

[0014] Furthermore, the thermal conductivity of the external heat dissipation part is greater than the thermal conductivity of the internal heat absorption part.

[0015] Beneficial effects: The utility model absorbs heat through the internal heat absorption part of the heat dissipation structure and then dissipates it through the external heat dissipation part. The outer shell acts as a heat conduction medium inside, which can improve the timeliness and efficiency of heat dissipation, extend the service life of the battery pack's battery cells and control board, and ensure the operational safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the top of the battery pack shell;

[0017] Figure 2 This is an enlarged schematic diagram of the partial structure of the rear half shell of the outer shell. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] like Figure 1 and Figure 2 As shown, a heat dissipation structure for a battery pack includes a battery pack housing 1, on which a heat dissipation structure 2 is disposed near the battery pack's control board. The heat dissipation structure 2 includes an inner heat absorption portion 3 and an outer heat dissipation portion 4. The inner heat absorption portion 3 is located inside the housing 1, while the outer heat dissipation portion 4 is located outside the housing 1. The inner heat absorption portion 3 and the outer heat dissipation portion 4 are thermally connected. This utility model absorbs heat from the inner heat absorption portion 3 of the heat dissipation structure 2 and then dissipates it through the outer heat dissipation portion 4. The housing 1 acts as a heat conduction medium within the heat dissipation structure 2, thereby improving the timeliness and efficiency of heat dissipation, extending the service life of the battery pack's cells and control board, and ensuring the operational safety of the battery pack.

[0020] More specifically, Figure 2 As shown, the inner heat absorption part 3 is close to the control board of the battery pack and fits with the inner shell surface of the outer shell 1, ensuring the effect of heat conduction from the inner heat absorption part 3 to the outer shell 1. The outer heat dissipation part 4 is integrally formed with the outer shell 1, and finally the heat is dissipated from the outer heat dissipation part 4.

[0021] It should be noted that in order to achieve an efficient heat dissipation effect of first absorbing heat and then dissipating it, it is necessary to ensure that the thermal conductivity of the external heat dissipation part 4 is greater than the thermal conductivity of the internal heat absorption part 3. In this way, heat can be efficiently conducted from the heat absorption structure to the heat dissipation structure and eventually dissipated.

[0022] In the present invention, since the control board of the battery pack is installed at the inner top of the battery pack, the heat dissipation structure 2 needs to be adapted, that is: the heat dissipation structure 2 is close to the control board located at the inner top of the battery pack, so that the internal heat absorption part 3 is located on the inner top surface of the outer shell 1, and the external heat dissipation part 4 is located on the outer top surface of the outer shell 1.

[0023] It is worth noting that in order to further improve the heat dissipation effect, the area of ​​the heat absorption structure and the area of ​​the heat dissipation structure can be enlarged relative to the area of ​​the control board. An embodiment provided by the present invention is: in the top view direction of the battery pack, the distribution area of ​​the internal heat absorption part 3 and the distribution area of ​​the external heat dissipation part 4 both cover the structural contour of the control board at the top of the battery pack, thereby further improving the heat dissipation performance.

[0024] In order to facilitate the assembly of the shell 1, the shell 1 of the present invention is a spliced ​​structure of front and rear half shells. Therefore, the heat dissipation structure 2 needs to be adapted to ensure better heat dissipation, that is: the internal heat absorption part 3 and the external heat dissipation part 4 are respectively separated by the spliced ​​connection of the shell 1 and are composed of two independent front and rear halves.

[0025] In the present invention, as a preferred embodiment, the inner heat absorption part 3 is a heat absorption plate that is bonded and connected to the inner fixed surface of the outer shell 1.

[0026] In the present invention, as a preferred embodiment, the external heat dissipation portion 4 includes a grid structure 41 arranged side by side. A heat dissipation duct 42 is formed between adjacent grid structures 41, which can be used to guide wind and achieve better heat dissipation. More specifically, the top of the heat dissipation duct 42 and the side facing away from the splicing position of the housing 1 are both open structures, which can improve the fluidity of wind or air in both active and passive modes. For example, in active mode, if air is blown from the top opening of the heat dissipation duct 42, the wind can be blown out smoothly from the side opening of the heat dissipation duct 42, and the phenomenon of wind backflow will not occur.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A heat dissipation structure for a battery pack, comprising a battery pack housing (1), a heat dissipation structure (2) disposed on the housing (1) and adjacent to a control board of the battery pack; Its characteristics are: The heat dissipation structure (2) comprises an inner heat absorbing portion (3) and an outer heat dissipation portion (4); the inner heat absorbing portion (3) is located on the inner side of the outer shell (1); the outer heat dissipation portion (4) is located on the outer side of the outer shell (1); and the inner heat absorbing portion (3) and the outer heat dissipation portion (4) are connected to each other by heat conduction.

2. The heat dissipation structure of a battery pack according to claim 1, characterized in that: The inner heat absorbing portion (3) is close to the control board of the battery pack and fits in contact with the inner shell surface of the outer shell (1), and the outer heat dissipating portion (4) and the outer shell (1) are integrally formed.

3. The heat dissipation structure of a battery pack according to claim 2, characterized in that: The heat dissipation structure (2) is close to the control board located at the top of the battery pack, so that the internal heat absorption part (3) is located on the inner top surface of the shell (1), and the external heat dissipation part (4) is located on the outer top surface of the shell (1).

4. The heat dissipation structure of a battery pack according to claim 3, characterized in that: In the direction of looking down at the battery pack, the distribution area of ​​the inner heat absorbing portion (3) and the distribution area of ​​the outer heat dissipating portion (4) both cover the structural outline of the control board at the top of the battery pack.

5. The heat dissipation structure of a battery pack according to claim 3, characterized in that: The outer shell (1) is a structure of front and rear half shells being spliced ​​together, and the inner heat absorbing portion (3) and the outer heat dissipating portion (4) are respectively separated by the spliced ​​connection of the outer shell (1) into two independent front and rear half structures.

6. The heat dissipation structure of a battery pack according to claim 5, characterized in that: The inner heat absorbing portion (3) is a heat absorbing plate that is bonded and connected to the inner fixed surface of the outer shell (1).

7. The heat dissipation structure of a battery pack according to claim 5, characterized in that: The external heat dissipation portion (4) comprises a grid bar structure (41) arranged side by side.

8. The heat dissipation structure of a battery pack according to claim 7, characterized in that: A heat dissipation duct (42) is formed between adjacent grid bar structures (41).

9. The heat dissipation structure of a battery pack according to claim 8, characterized in that: The top of the heat dissipation duct (42) and the side facing away from the splicing position of the housing (1) are both open structures.

10. The heat dissipation structure of a battery pack according to any one of claims 1 to 9, characterized in that: The thermal conductivity of the external heat dissipation part (4) is greater than the thermal conductivity of the internal heat absorption part (3).

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