Battery pack structure

Abstract

The utility model provides a battery pack structure. The battery pack structure comprises a mounting frame, a fixed base, a battery module and a fan assembly, the fixed base is connected with the bottom of the mounting frame, so that a heat dissipation space is formed in the mounting frame; the battery module and the fan assembly are separately arranged in the heat dissipation space at intervals; a plurality of heat dissipation channels communicated with the heat dissipation space are arranged on the fixed base at intervals, each heat dissipation channel comprises at least two heat dissipation hole sections which are arranged in sequence and are different in diameter, and air in the heat dissipation space is blown into the heat dissipation space through the fan assembly and exhausted from the heat dissipation channels; wherein the cross street area of the heat dissipation channel is gradually reduced from the inner side to the outer side of the fixed base, so that the problems of poor heat dissipation effect and complex heat dissipation structure of the battery pack in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technology field, specifically, relate to a battery package structure. BACKGROUND

[0002] At present, for the battery package of multiple battery cells, in order to improve the use performance, the focus is to improve the charge-discharge power and increase the capacity, so the corresponding heat dissipation function is usually configured.

[0003] The following means are usually used in the prior art:

[0004] 1. Air cooling: air cooling is one of the most widely used battery cooling methods at present, and its principle is to introduce surrounding air into the battery package for heat dissipation through fans or ventilation holes. The advantages of this method are low cost and simple implementation, but the efficiency is relatively low, and it may not be able to effectively dissipate heat in high temperature environment.

[0005] 2. Liquid cooling: liquid cooling is a heat dissipation method that absorbs and transfers heat through circulating liquid. The advantages of this method are high heat dissipation efficiency and stable operation in a wide temperature range, but it is relatively complex, requiring additional cooling devices and pipelines, increasing cost and maintenance difficulty.

[0006] 3. Phase change material heat dissipation: phase change material is a material that can absorb and release heat within a certain temperature range, which can be used as a way of battery package heat dissipation. Its advantages are high heat dissipation efficiency and no need for external energy input, but the stability and life of phase change material may be a problem, which needs to be replaced regularly.

[0007] However, the current battery package heat dissipation technology still has some problems, such as low heat dissipation efficiency, high cost, stability and life challenges. In the conventional design, the fan power is usually increased, the cooling liquid is increased and the area of the heat sink is increased to achieve better heat dissipation effect, which greatly increases the production cost of the product, and the overall assembly process is complex, which cannot provide timeliness and production capacity. UTILITY MODEL CONTENT

[0008] The main purpose of the utility model is to provide a battery package structure to solve the problem of poor heat dissipation effect and complex heat dissipation structure of the battery package in the prior art.

[0009] In order to achieve the above object, the utility model provides a kind of battery pack structure, comprising: mounting frame;Fixed base, with the bottom of mounting frame is connected, to make the heat dissipation space formed in mounting frame;Battery module and fan assembly are respectively spaced and arranged in heat dissipation space;Fixed base is spaced apart and is provided with multiple heat dissipation channels communicated with heat dissipation space, each heat dissipation channel includes at least two heat dissipation hole sections of sequentially arranged and inconsistent diameter, to blow wind to heat dissipation space by fan assembly and make gas in heat dissipation space discharge from multiple heat dissipation channels;Wherein, the cross-sectional area of heat dissipation channel gradually decreases along the direction of the inside of fixed base to outside.

[0010] Further, each heat dissipation channel includes first heat dissipation hole section and second heat dissipation hole section sequentially communicated along the direction of the inside of fixed base to outside;Wherein, first heat dissipation hole section and second heat dissipation hole section are circular holes, the diameter of first heat dissipation hole section is greater than the diameter of second heat dissipation hole section;Or, first heat dissipation hole section is conical hole, second heat dissipation hole section is circular hole, the diameter of first heat dissipation hole section gradually decreases along the direction of the inside of fixed base to outside, and the minimum diameter of first heat dissipation hole section is consistent with the maximum diameter of second heat dissipation hole section.

[0011] Further, the diameter of first heat dissipation hole section is first preset value A, and the diameter of second heat dissipation hole section is second preset value B;Wherein, when first heat dissipation hole section and second heat dissipation hole section are circular holes, second preset value B satisfies: 1mm≤B≤30mm, and between first preset value A and second preset value B satisfies: A≥2B;Or, when first heat dissipation hole section is conical hole, and second heat dissipation hole section is circular hole, second preset value B satisfies: 1mm≤B≤30mm, and the minimum value of first preset value A is consistent with the maximum value of second preset value B, and between the maximum value of first preset value A and the maximum value of second preset value B satisfies: A≥2B.

[0012] Further, each heat dissipation channel is conical hole structure, and the diameter of heat dissipation channel sequentially decreases along the direction of the inside of fixed base to outside.

[0013] Further, the battery module includes: support frame body, respectively connected with mounting frame and fixed base;Multiple electric cores are respectively spaced and arranged in support frame body, and support frame body is arranged along the circumferential direction of mounting frame.

[0014] Further, the bottom of support frame body is provided with first threaded hole, and fixed base is provided with first threaded column correspondingly, and first threaded hole and first threaded column are threadedly connected by first connecting component;And / or, second threaded hole is arranged on support frame body, and second threaded column is arranged on mounting frame, and second threaded hole and second threaded column are threadedly connected by second connecting component.

[0015] Further, a plurality of ventilation holes are arranged on the mounting frame at intervals along the circumferential direction of the mounting frame, and the heat dissipation battery pack further comprises: a plurality of cooling fins arranged on the mounting frame corresponding to the plurality of ventilation holes.

[0016] Further, the fan assembly is arranged in the middle of the mounting frame, and the battery module is arranged around the fan assembly, wherein the fan assembly comprises: a driving part connected with the fixed base and arranged to avoid the plurality of heat dissipation channels; and a fan part arranged on the top of the driving part and connected with the driving end of the driving part through a rubber pad, so that the driving part drives the fan part to blow air into the heat dissipation space.

[0017] Further, the battery pack structure further comprises: a cover connected with the top of the mounting frame; and a shell body, at least part of the mounting frame located at one end of the fixed base is arranged in the shell body, and the fixed base and the inner wall of the shell body have a containing space therebetween, so that the gas flowing out through the plurality of heat dissipation channels flows into the containing space.

[0018] Further, a third threaded hole is arranged on the mounting frame, a fourth threaded hole is arranged on the fixed base, and a third threaded column is arranged on the shell body, the third threaded hole, the fourth threaded hole and the third threaded column are sequentially arranged and are threadedly connected with each other through a third connecting part.

[0019] The technical scheme of the battery pack structure comprises a mounting frame, a fixed base, a battery module and a fan assembly; the fixed base is connected with the bottom of the mounting frame to form a heat dissipation space in the mounting frame; the battery module and the fan assembly are arranged at intervals in the heat dissipation space; a plurality of heat dissipation channels communicating with the heat dissipation space are arranged at intervals on the fixed base, each heat dissipation channel comprises at least two heat dissipation hole sections arranged in sequence and having different diameters, so that the gas carrying the heat generated by the battery module is discharged from the plurality of heat dissipation channels when the fan assembly blows air into the heat dissipation space; and the cross-sectional area of the heat dissipation channel gradually decreases along the direction from the inner side to the outer side of the fixed base. In this way, the heat dissipation channel with at least two heat dissipation hole sections having different diameters and the cross-sectional area of the heat dissipation channel gradually decreasing along the flow direction of the gas enable the gas discharged from the heat dissipation channel to produce compression and expansion effects and discharge the heat carried by the gas when the fan assembly blows air into the heat dissipation space, so that the heat generated by the battery module can be released to the maximum extent, the overall structure is simple, and it is not necessary to additionally increase the area of cooling fins or cooling liquid, thereby greatly saving material cost, simplifying assembly process, improving timeliness and production capacity, and further solving the problems of poor heat dissipation effect and complex heat dissipation structure of the battery pack in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification provide further understanding of the present application, the illustrative embodiments of the present application and the explanations thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 An overall structure schematic diagram provided by the embodiment of the battery pack structure according to the present application is shown;

[0022] Figure 2 A side sectional view provided by the embodiment of the battery pack structure according to the present application is shown;

[0023] Figure 3 An explosion diagram provided by the embodiment of the battery pack structure according to the present application is shown;

[0024] Figure 4 An explosion diagram of the battery module provided by the embodiment of the battery pack structure according to the present application is shown;

[0025] Figure 5 An explosion diagram of the fan assembly provided by the embodiment of the battery pack structure according to the present application is shown

[0026] Figure 6 A sectional view of the fixing base provided by the embodiment of the battery pack structure according to the present application is shown.

[0027] Among the above drawings, the following reference signs are included:

[0028] 10, mounting frame; 11, heat dissipation space; 12, ventilation hole; 13, third threaded hole; 20, fixing base; 21, heat dissipation channel; 211, first heat dissipation hole section; 212, second heat dissipation hole section; 22, first threaded column; 23, fourth threaded hole; 30, battery module; 31, support frame body; 311, first threaded hole; 32, electric core; 33, PCM; 34, PC sheet; 35, nickel sheet; 40, fan assembly; 41, driving component; 42, fan component; 43, rubber pad; 50, heat dissipation fin; 60, surface cover; 70, shell main body; 71, containing space; 72, third threaded column. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] In order to solve the problems of complex overall structure assembly and high production cost of the heat dissipation battery pack in the prior art, the present application provides a heat dissipation battery pack structure.

[0031] Please refer to Figures 1 to 6As shown, the battery pack structure includes a mounting frame 10, a fixed base 20, a battery module 30 and a fan assembly 40; the fixed base 20 is connected with the bottom of the mounting frame 10 to form a heat dissipation space 11 in the mounting frame 10; the battery module 30 and the fan assembly 40 are respectively and spacedly arranged in the heat dissipation space 11; a plurality of heat dissipation channels 21 which are in communication with the heat dissipation space 11 are spacedly arranged on the fixed base 20, each heat dissipation channel 21 includes at least two heat dissipation hole sections which are sequentially arranged and have different diameters, so that the air in the heat dissipation space 11 is blown by the fan assembly 40 and the gas carrying the heat generated by the battery module 30 is discharged from the plurality of heat dissipation channels 21; wherein the cross-sectional area of the heat dissipation channel 21 gradually decreases along the direction from the inner side to the outer side of the fixed base 20.

[0032] According to the technical scheme of the embodiment, the heat dissipation channel 21 has at least two heat dissipation hole sections with different diameters, and the cross-sectional area of the heat dissipation channel gradually decreases along the flow direction of the gas, so that when the fan assembly 40 blows air into the heat dissipation space 11, the gas discharged from the heat dissipation channel 21 produces compression and expansion effects and discharges the heat carried by the gas, which can maximize the release of the heat generated by the battery module 30, the overall structure is simple, and additional heat dissipation fins 50 or cooling liquid are not required, which greatly saves material costs, the assembly process is simple, the timeliness and production capacity are improved, and the problems of poor heat dissipation effect and complex heat dissipation structure of the battery pack in the prior art are solved.

[0033] As shown in the figure, Figure 6 each heat dissipation channel 21 includes a first heat dissipation hole section 211 and a second heat dissipation hole section 212 which are sequentially and in communication along the direction from the inner side to the outer side of the fixed base 20; wherein the first heat dissipation hole section 211 is a tapered hole, the second heat dissipation hole section 212 is a circular hole, the diameter of the first heat dissipation hole section 211 gradually decreases along the direction from the inner side to the outer side of the fixed base 20, and the minimum diameter of the first heat dissipation hole section 211 is consistent with the maximum diameter of the second heat dissipation hole section 212. In this way, through the heat dissipation channel 21 designed as a size hole structure, under the same fan power and heat dissipation fin 50 area, the gas enters from the first heat dissipation hole section 211 with a large diameter and an inclined surface and then exits from the second heat dissipation hole section 212 with a small diameter under the blowing of the fan assembly 40, so that the first heat dissipation hole section 211 which is a tapered hole improves the distribution of airflow to some extent and makes the gas flow more uniformly, thereby improving the ventilation efficiency; when the gas is sprayed from the second heat dissipation hole section 212, the speed of the gas will rapidly increase, accompanied by a decrease in pressure, at this time, the kinetic energy of the air increases, and the temperature will also decrease, so as to achieve the heat dissipation effect.

[0034] Optionally, the first and second heat dissipation hole sections are circular holes, and the diameter of the first heat dissipation hole section is greater than the diameter of the second heat dissipation hole section. In this way, by designing the stepped heat dissipation channel 21 in the form of a size hole structure, under the same fan power and fin 50 area, the gas from the first heat dissipation hole section 211 with a larger diameter enters and then exits from the second heat dissipation hole section 212 with a smaller diameter under the blowing of the fan assembly 40. When the gas is ejected from the second heat dissipation hole section 212, the speed of the gas will rapidly increase, accompanied by a decrease in pressure. At this time, the kinetic energy of the air increases, and the temperature will also decrease, to achieve the heat dissipation effect.

[0035] In the present embodiment, the airflow blown by the fan assembly 40 is a high-speed gas flow generated after acceleration by the fan blades, in which compression and expansion of the gas are formed. When the gas is accelerated, the speed of the gas increases, and the pressure of the gas also rises. When passing through the nozzle or air outlet, the gas flow rate suddenly decreases, and the pressure of the gas also decreases accordingly, so that the effects of compression and expansion are generated, and the heat in the air is taken away.

[0036] Further, it is pointed out in Bernoulli's law that in a fluid system such as gas flow or water flow, the faster the flow rate, the smaller the pressure generated by the fluid. Therefore, when the speed of the airflow blown by the fan assembly 40 increases, the pressure decreases, thereby taking away more heat.

[0037] In the present embodiment, the first heat dissipation hole section 211 is a conical hole, and the second heat dissipation hole section 212 is a circular hole. The diameter of the first heat dissipation hole section 211 is a first preset value A, and the diameter of the second heat dissipation hole section 212 is a second preset value B. Preferably, the second preset value B satisfies: 1mm≤B≤30mm; the minimum value of the first preset value A is consistent with the maximum value of the second preset value B, and the maximum value of the first preset value A satisfies: A≥2B.

[0038] Optionally, when the first and second heat dissipation hole sections 211 and 212 are circular holes, the diameter of the first heat dissipation hole section 211 is a first preset value A, and the diameter of the second heat dissipation hole section 212 is a second preset value B. The above setting, the second preset value B of the diameter of the second heat dissipation hole section 212 satisfies: 1mm≤B≤30mm, and the first preset value A and the second preset value B satisfy: A≥2B.

[0039] Optionally, each heat dissipation channel 21 is a conical hole structure, and the diameter of the heat dissipation channel 21 decreases in the direction from the inner side to the outer side of the fixed base 20. In this way, when the gas is ejected from the heat dissipation channel 21 in the form of a conical hole structure, the speed of the gas will rapidly increase, accompanied by a decrease in pressure. At this time, the kinetic energy of the air increases, and the temperature will also decrease, to achieve the heat dissipation effect.

[0040] As Figure 4 shown, the battery module 30 includes a support frame body 31 and a plurality of battery cells 32; the support frame body 31 is connected with the mounting frame 10 and the fixed base 20 respectively; the plurality of battery cells 32 are arranged in the support frame body 31 at intervals respectively, and the support frame body 31 is arranged along the circumferential direction of the mounting frame 10. The above arrangement is to weld the nickel sheet 35 after the plurality of battery cells 32 are loaded into the support frame body 31, the top nickel sheet 35 is welded with the battery cell 32, then the PC sheet 34 is attached, the top nickel sheet 35 passes through the PCM 33 and is welded with the PCM 33, the bottom nickel sheet 35 is welded with the battery cell 32 and is welded with the welding cable, the welding cable is welded with the PCM 33, and finally the PC sheet 34 is attached at the bottom to complete the assembly of the battery module 30.

[0041] As Figure 2 shown, the bottom of the support frame body 31 is provided with a first threaded hole 311, and the fixed base 20 is provided with a first threaded column 22 corresponding to the first threaded hole 311, and the first threaded hole 311 and the first threaded column 22 are threadedly connected with each other through a first connecting component; and / or, the support frame body 31 is provided with a second threaded hole, and the mounting frame 10 is provided with a second threaded column, and the second threaded hole and the second threaded column are threadedly connected with each other through a second connecting component. In this way, the support frame body 31 is detachably connected with the fixed base 20 and the mounting frame 10 through the first connecting component and the second connecting component which are screws.

[0042] Specifically, the mounting frame 10 is provided with a plurality of ventilation holes 12 at intervals along the circumferential direction thereof, and the heat dissipation battery pack further includes heat dissipation fins 50, which are arranged on the mounting frame 10 corresponding to the plurality of ventilation holes 12, and the area occupied by the heat dissipation fins 50 along the circumferential direction of the mounting frame 10 is consistent with the area occupied by the battery module 30. The above arrangement is that the projection area of the heat dissipation fins 50 on the circumferential surface of the mounting frame 10 is the same as the projection area of the battery module 30 on the circumferential surface of the mounting frame 10. The above arrangement is that the heat dissipation fins 50 are fixed on the mounting frame 10 corresponding to the plurality of ventilation holes 12 through the limiting ribs or the glue dispensing method on the mounting frame 10. In this way, through the design of the plurality of heat dissipation channels 21 on the fixed base 20, it is not necessary to additionally increase the area of the heat dissipation fins 50 or to increase the cooling liquid, which greatly reduces the production cost of the product, and the overall assembly process is simple, which improves the timeliness and production capacity.

[0043] As Figure 5As shown in the figure, the fan assembly 40 is arranged in the middle of the mounting frame 10, and the battery module 30 is arranged around the fan assembly 40, the fan assembly 40 comprises a driving part 41 and a fan part 42; the driving part 41 is connected with the fixed base 20 and avoids the plurality of heat dissipation channels 21; the fan part 42 is arranged on the top of the driving part 41 and is connected with the driving end of the driving part 41 through the rubber pad 43, so that the driving part 41 drives the fan part 42 to blow into the heat dissipation space 11. The above-mentioned setting, the driving part 41 is a motor, and the driving part 41 and the PCM 33 of the battery module 30 are fixed by welding.

[0044] As shown in the figure, Figure 3 The battery pack structure further comprises a face cover 60 and a shell body 70; the face cover 60 is connected with the top of the mounting frame 10; at least part of the mounting frame 10 located at one end of the fixed base 20 is arranged in the shell body 70, and the fixed base 20 and the inner wall surface of the shell body 70 have a containing space 71, so that the gas flowing out through the plurality of heat dissipation channels 21 flows into the containing space 71. The above-mentioned setting, the face cover 60 is fixed with the top of the mounting frame 10 by means of hot melting, so that the heat dissipation space 11 is formed in the mounting frame 10, the fixed base 20 is connected with the bottom of the mounting frame 10 and is assembled into the shell body 70, and the containing space 71 formed between the fixed base 20 and the shell body 70 makes the gas flowing through the plurality of heat dissipation channels 21 into the containing space 71 for heat dissipation.

[0045] Specifically, the third threaded hole 13 is arranged on the mounting frame 10, the fourth threaded hole 23 is arranged on the fixed base 20, and the third threaded column 72 is arranged on the shell body 70, and the third threaded hole 13, the fourth threaded hole 23 and the third threaded column 72 are sequentially arranged and are threadedly connected with each other through the third connecting part. In this way, the fixed base 20 is detachably connected with the mounting frame 10 and the shell body 70 through screws respectively.

[0046] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0047] The battery pack structure comprises a mounting frame, a fixed base, a battery module and a fan assembly; the fixed base is connected with the bottom of the mounting frame to form a heat dissipation space in the mounting frame; the battery module and the fan assembly are respectively and spacedly arranged in the heat dissipation space; a plurality of heat dissipation channels in communication with the heat dissipation space are spacedly arranged on the fixed base, each heat dissipation channel comprises at least two heat dissipation hole sections arranged in sequence and having different diameters, so that the gas carrying the heat generated by the battery module is discharged from the plurality of heat dissipation channels when the fan assembly blows air into the heat dissipation space. In this way, the heat dissipated by the battery module can be released to the maximum extent through the heat dissipation channels with at least two heat dissipation hole sections of different diameters, the overall structure is simple, and it is not necessary to additionally increase the area of the heat dissipation fins or increase the cooling liquid, thereby greatly saving the material cost, the assembly process is simple, the timeliness and production capacity are improved, and the problems of poor heat dissipation effect and complex heat dissipation structure of the battery pack in the prior art are solved.

[0048] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0049] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically indicated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship for the convenience of description. The technology, methods and devices known to those skilled in the related art can not be discussed in detail, but under appropriate circumstances, the technology, methods and devices should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0050] In the description of the utility model, need understanding is, the orientation word such as " before, after, top, bottom, left, right " " horizontal, vertical, perpendicular, horizontal " and " top, bottom " and so on indicated orientation or positional relationship usually is based on the orientation or positional relationship shown in drawing, just is for the convenience of describing the utility model and simplifying description, under the condition without making opposite statement, these orientation words do not indicate and suggest the device or element indicated must have specific orientation or with specific orientation structure and operation, therefore can not be understood as the restriction of the protection scope of the utility model;The orientation word " interior, exterior " refers to the interior and exterior relative to the contour of each component.

[0051] For the convenience of description, spatial relative terms can be used here, such as "on", "above", "upper surface", "upper" and the like, to describe the spatial position relationship of one device or feature with other devices or features as shown in the figure. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.

[0052] The above only is the preferred embodiment of the utility model, and does not limit the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A battery pack structure, characterized by, The utility model relates to a battery module cooling device, including: Mounting frame (10); Fixed base (20) is connected with the bottom of mounting frame (10) to form heat dissipation space (11) in mounting frame (10); Battery module (30) and fan assembly (40) are arranged in heat dissipation space (11) respectively and intervally;Fixed base (20) is provided with a plurality of heat dissipation channels (21) in communication with heat dissipation space (11) intervally, and each heat dissipation channel (21) comprises at least two heat dissipation hole sections arranged in sequence and with inconsistent diameters, so that the fan assembly (40) blows air into heat dissipation space (11) and makes the gas in heat dissipation space (11) discharge from a plurality of heat dissipation channels (21); Wherein, the cross-sectional area of the heat dissipation channel (21) gradually decreases along the direction from the inside to the outside of the fixed base (20).

2. The battery pack structure of claim 1, wherein, Each heat dissipation channel (21) comprises a first heat dissipation hole section (211) and a second heat dissipation hole section (212) in communication in sequence along the direction from the inside to the outside of the fixed base (20); Wherein, the first heat dissipation hole section (211) and the second heat dissipation hole section (212) are both circular holes, the diameter of the first heat dissipation hole section (211) is greater than the diameter of the second heat dissipation hole section (212);Or, The first heat dissipation hole section (211) is a conical hole, and the second heat dissipation hole section (212) is a circular hole, the diameter of the first heat dissipation hole section (211) gradually decreases along the direction from the inside to the outside of the fixed base (20), and the minimum diameter of the first heat dissipation hole section (211) is consistent with the maximum diameter of the second heat dissipation hole section (212).

3. The battery pack structure of claim 2, wherein, The diameter of the first heat dissipation hole section (211) is a first preset value A, and the diameter of the second heat dissipation hole section (212) is a second preset value B; Wherein, when the first heat dissipation hole section (211) and the second heat dissipation hole section (212) are both circular holes, the second preset value B satisfies: 1mm≤B≤30mm, and the first preset value A and the second preset value B satisfy: A≥2B;Or, When the first heat dissipation hole section (211) is a conical hole and the second heat dissipation hole section (212) is a circular hole, the second preset value B satisfies: 1mm≤B≤30mm, the minimum value of the first preset value A is consistent with the maximum value of the second preset value B, and the maximum value of the first preset value A and the maximum value of the second preset value B satisfy: A≥2B.

4. The battery pack structure of claim 1, wherein, Each heat dissipation channel (21) is a conical hole structure, and the diameter of the heat dissipation channel (21) decreases in sequence along the direction from the inside to the outside of the fixed base (20).

5. The battery pack structure of claim 1, wherein, The battery module (30) comprises: Support frame body (31) is connected with mounting frame (10) and fixed base (20) respectively; A plurality of electric cores (32) are arranged in support frame body (31) respectively and intervally, and support frame body (31) is arranged along the circumferential direction of mounting frame (10).

6. The battery pack structure of claim 5, wherein, The bottom of the support frame body (31) is provided with a first threaded hole (312), and the fixing base (20) is correspondingly provided with a first threaded column (22), the first threaded hole (312) and the first threaded column (22) are threadedly connected through a first connecting component; and / or, The support frame body (31) is provided with a second threaded hole, and the mounting frame (10) is provided with a second threaded column, the second threaded hole and the second threaded column are threadedly connected through a second connecting component.

7. The battery pack structure of claim 1, wherein, The mounting frame (10) is provided with a plurality of ventilation holes (12) along the circumferential direction thereof, and the battery pack further comprises: A plurality of heat dissipation fins (50) are provided on the mounting frame (10) corresponding to the plurality of ventilation holes (12).

8. The battery pack structure of claim 1, wherein, The fan assembly (40) is arranged in the middle of the mounting frame (10), and the battery module (30) is arranged around the fan assembly (40), the fan assembly (40) comprises: A driving component (41) connected with the fixing base (20) and avoiding the plurality of heat dissipation channels (21); A fan component (42) arranged on the top of the driving component (41) and connected with the driving end of the driving component (41) through a rubber pad (43), so that the driving component (41) drives the fan component (42) to blow air into the heat dissipation space (11).

9. The battery pack structure of claim 1, wherein, The battery pack structure further comprises: A face cover (60) connected with the top of the mounting frame (10); An outer shell body (70), at least part of the mounting frame (10) located at one end of the fixing base (20) is arranged in the outer shell body (70), and the fixing base (20) and the inner wall surface of the outer shell body (70) have an accommodation space (71) therebetween, so that the gas flowing out through the plurality of heat dissipation channels (21) flows into the accommodation space (71).

10. The battery pack structure of claim 9, wherein, The mounting frame (10) is provided with a third threaded hole (13), the fixing base (20) is provided with a fourth threaded hole (23), and the outer shell body (70) is provided with a third threaded column (72), the third threaded hole (13), the fourth threaded hole (23) and the third threaded column (72) are sequentially arranged and threadedly connected through a third connecting component.

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