A dual fan battery pack

Abstract

The utility model relates to battery installation package technical field, concretely relates to a double fan battery pack, aims at solving the problem of single fan's poor heat dissipation effect in battery pack. Its technical scheme main points are: casing, the casing contains a plurality of batteries and electronic components, the casing is detachably connected with fan group, the fan group includes at least two fans with included angle of heat dissipation airflow direction, the fan group is arranged at the position close to the inner wall of casing one side, the casing is provided with a plurality of air inlets close to the air inlet end of fan group, the casing is provided with a plurality of air outlets on the other three side walls except the side wall provided with air inlet; the batteries and electronic components are located on the heat dissipation airflow path formed by fan group, the synergistic effect of first fan and second fan forms the heat dissipation airflow of high air volume coverage and high air pressure penetration, improves the heat dissipation efficiency, and the combination of both makes the battery bottom and upper surface have sufficient heat dissipation airflow, solves the problem of poor local heat dissipation effect in traditional heat dissipation scheme.

Description

Technical Field

[0001] This utility model relates to the field of battery packs, and in particular to a dual-fan battery pack. Background Technology

[0002] In fields such as new energy vehicles and energy storage equipment, battery packs, as the core energy storage units, generate heat during the charging and discharging process. If this heat cannot be dissipated in time, the internal temperature of the battery pack will continue to rise. The increased temperature will not only reduce the energy density of the battery and shorten its cycle life, but may also cause safety accidents.

[0003] Traditional battery pack cooling typically uses a single fan as the air source to send cool air into the battery pack, where it is expelled after heat exchange. However, the airflow direction of the cooling air is straight, and the direct coverage area of ​​the cooling air is small. This results in significant differences in the cooling effect at different locations within the battery pack, leading to poor overall cooling performance of the battery pack.

[0004] Therefore, a new technical solution is needed to address the problems existing in the current technology. Utility Model Content

[0005] The purpose of this invention is to provide a dual-fan battery pack to solve the problem of poor heat dissipation of a single fan in the existing battery pack.

[0006] The technical solution of this utility model is: a dual-fan battery pack, comprising: A housing containing several batteries and electronic components; A fan assembly is detachably connected inside the housing. The fan assembly includes at least two fans whose cooling airflow directions are at an angle to each other. The cooling airflows are at different heights. The fan assembly is located near the inner wall of one side of the housing. The housing has several air inlets near the air inlet end of the fan assembly, and the housing has several air outlets on the other three side walls besides the side wall with the air inlets. The battery and electronic components are located on the heat dissipation airflow path formed by the fan assembly.

[0007] Preferably, the fan assembly includes a first fan and a second fan, wherein the airflow directions of the first fan and the second fan are perpendicular to each other.

[0008] Preferably, the second fan is positioned above the first fan.

[0009] Preferably, the air outlet includes a first air outlet on the housing sidewall facing the air outlet end of the first fan and a second air outlet on the housing sidewall facing the air outlet end of the second fan, wherein the second air outlet is offset from the air outlet end of the second fan.

[0010] Preferably, the second fan has a bidirectional air outlet structure, with the second air outlets symmetrically arranged on both sides of the housing.

[0011] Preferably, the first fan is fixedly connected to the side wall of the housing, and the second fan is detachably connected to the top wall of the housing.

[0012] Preferably, the first fan is an axial fan; the second fan is a centrifugal fan.

[0013] Preferably, the second fan is placed horizontally.

[0014] Preferably, an adjustable air guide plate is detachably connected inside the housing, and the cooling airflow of the fan assembly is guided through the adjustable air guide plate to the gap between the battery and the electronic components.

[0015] Compared with the prior art, the advantages of this utility model are: (1) The synergistic effect of the first fan and the second fan forms a heat dissipation airflow with high air volume coverage and high air pressure penetration, which improves the heat dissipation efficiency by more than 40% compared with the traditional single fan solution. The centrifugal fan can drive the heat dissipation airflow to effectively penetrate the dense gap between the battery and electronic components, while the axial fan quickly delivers air. The combination of the two ensures that there is sufficient heat dissipation airflow on both the bottom and top surfaces of the battery, solving the problem of poor local heat dissipation effect in the traditional heat dissipation solution.

[0016] (2) The staggered arrangement of the second air outlet and the fan air outlet causes the heat dissipation airflow of the second fan to form turbulence between the side wall of the housing and the battery, which increases the heat exchange area compared to the air outlet directly opposite.

[0017] (3) The dual fans operate independently. When one fan fails, the other fan can still maintain its own heat dissipation capacity, ensuring that thermal runaway protection is not triggered within a certain period of time, reserving emergency handling time for users and reducing the risk of overheating. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the battery pack described in this utility model; Figure 2 This is a cross-sectional view of the battery pack of this utility model without the battery and electronic components. Figure 3 This is a schematic diagram of the battery pack of the present invention with the battery, electronic components, and upper casing removed. Figure 4 This is a schematic diagram of the battery pack of this utility model with the battery, electronic components, and lower housing removed.

[0019] Wherein: 1. Housing; 11. Air inlet; 111. First air inlet; 112. Second air inlet; 12. Air outlet; 121. First air outlet; 122. Second air outlet; 2. Fan assembly; 21. First fan; 22. Second fan. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1-4 As shown, a dual-fan battery pack includes a housing 1, which comprises an upper housing and a lower housing. The upper housing and the lower housing are connected by bolts and a silicone sealing ring. The housing 1 contains several batteries, electronic components, and a fan assembly 2. The batteries and electronic components are located on the heat dissipation airflow path formed by the fan assembly 2. The fan assembly 2 is detachably connected to the housing 1 and includes at least two fans whose heat dissipation airflow directions are at an angle. In at least one embodiment, it includes a first fan 21 and a second fan 22. The two heat dissipation airflows have different heights. The fan assembly 2 is located near the inner wall of the housing 1. The housing 1 has several air inlets 11 near the air inlet end of the fan assembly 2. The air inlets 11 ensure that the airflow can meet the airflow requirements of the fan assembly 2 while preventing large particles of impurities from entering. The housing 1 has several air outlets 12 on the other three side walls besides the side walls with air inlets 11. The air outlets 12 include a first air outlet 121 on the side wall of the housing 1 facing the air outlet end of the first fan 21 and an outlet 122 on the side wall with air outlets 12. The air outlet of the second fan 22 faces the second air outlet 122 on the side wall of the housing 1. The second air outlet 122 is offset from the air outlet of the second fan 22. The angled arrangement of the first fan 21 and the second fan 22 creates a more reasonable airflow direction within the housing 1, avoiding turbulent or obstructed airflow and improving overall heat dissipation performance. The offset arrangement of the second air outlet 122 from the air outlet of the second fan 22 creates turbulence between the side wall of the housing 1 and the battery after the airflow from the second fan 22 is delivered, enhancing the flushing effect of the airflow on the side of the battery. Compared to the directly facing air outlet 12, the offset arrangement increases the heat exchange area. The arrangement of the fan group 2 also improves the reliability of the heat dissipation system. When one fan fails, the other fan can still provide heat dissipation, ensuring that the battery pack can continue to work normally for a certain period of time without triggering thermal runaway protection. This provides users with emergency handling time and reduces the risk of battery pack overheating due to heat dissipation system failure.

[0021] like Figures 1-4As shown, in at least one embodiment, the airflow directions of the first fan 21 and the second fan 22 are perpendicular to each other. The second fan 22 is positioned above the first fan 21. The first fan 21 is fixed to the side wall of the housing 1 by an L-shaped bracket, with sufficient space between the fan and the side wall. The second fan 22 is connected to the top wall of the housing 1 by four M5 shock-absorbing bolts to reduce vibration transmission during fan operation. The first fan 21 is an axial fan; the second fan 22 is a centrifugal fan. The second fan 22 is horizontally placed. The housing 1 has several air outlets 12 on the three side walls other than the side wall with the air inlet 11. The air outlets 12 are grille-type, with each hole being elongated. Several air outlets 12 on the side wall of the housing 1 facing the air outlet of the second fan 22 are staggered with the air outlet of the second fan 22. The centrifugal fan can generate higher air pressure, thus reducing air pressure. After being pressurized, the air is sent into the housing 1, which can effectively drive the air to flow inside the housing 1 and push the heat dissipation airflow through the dense gaps between the battery and electronic components. The axial fan has a large air volume and can quickly deliver air. The first fan 21 and the second fan 22 are combined to form a fan group 2, which can generate a stronger heat dissipation airflow inside the housing 1, so that heat dissipation airflow passes through the bottom and top surfaces of the battery. The air better covers all areas inside the housing 1, reducing temperature dead zones. In traditional solutions, the temperature difference inside the battery pack can usually reach 5-8℃. Using the improved dual-fan battery reduces the temperature difference to within 2-3℃, improves the temperature uniformity inside the housing 1, and thus improves the heat dissipation efficiency. The heat dissipation inside the housing 1 is more sufficient, which improves the overall temperature control efficiency of the battery pack. The synergistic effect of the first fan 21 and the second fan 22 improves the heat dissipation efficiency by more than 40%.

[0022] In at least one embodiment, the second fan 22 has a bidirectional air outlet structure, and a number of air outlets 12 facing the two side walls of the housing 1 are symmetrically arranged, thereby improving the problem of dense heat dissipation airflow on one side and sparse heat dissipation airflow on the other side inside the housing 1, expanding the coverage of heat dissipation airflow, and thus enhancing the overall heat dissipation effect of the battery pack.

[0023] In at least one embodiment, an adjustable air guide plate is detachably connected inside the housing 1. The cooling airflow of the fan group 2 is guided through the adjustable air guide plate to the gap between the battery and the electronic components. The adjustable air guide plate is adjusted by a knob to adjust the angle with the horizontal direction. The adjustable air guide plate guides the cooling airflow precisely into the gap between the battery and the electronic components through directional airflow, reducing the loss of cooling airflow and further enhancing the local heat dissipation effect inside the housing 1.

[0024] like Figures 1-4As shown, the dual-fan battery pack improves heat dissipation efficiency through the synergistic effect of the fan group 2 and the turbulence effect formed by the staggered air outlet 12, solving the problems of insufficient local heat dissipation and heat dissipation dead zones. The two fans operate independently, and if one fan fails, the other fan can still maintain its own heat dissipation capacity, ensuring that thermal runaway protection is not triggered for a certain period of time after the failure, thus improving the overall heat dissipation performance, reliability and adaptability of the battery pack.

[0025] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A dual-fan battery pack, characterized in that, include: The housing (1) contains a number of batteries and electronic components; A fan assembly (2) is detachably connected inside the housing (1). The fan assembly (2) includes at least two fans whose cooling airflow directions are at an angle to each other. The heights of the cooling airflow are different. The fan assembly (2) is located on the inner wall of the housing (1) side. The housing (1) has several air inlets (11) near the air inlet end of the fan assembly (2), and the housing (1) has several air outlets (12) on the other three side walls besides the side wall with air inlets (11). The battery and electronic components are located on the heat dissipation airflow path formed by the fan assembly (2).

2. The dual-fan battery pack according to claim 1, characterized in that: The fan assembly includes a first fan (21) and a second fan (22), and the airflow directions of the first fan (21) and the second fan (22) are perpendicular to each other.

3. A dual-fan battery pack according to claim 2, characterized in that: The second fan (22) is positioned above the first fan (21).

4. A dual-fan battery pack according to claim 2, characterized in that: The air outlet (12) includes a first air outlet (121) on the side wall of the housing (1) facing the air outlet end of the first fan (21) and a second air outlet (122) on the side wall of the housing (1) facing the air outlet end of the second fan (22). The second air outlet (122) is offset from the air outlet end of the second fan (22).

5. A dual-fan battery pack according to claim 4, characterized in that: The second fan (22) has a bidirectional air outlet structure, and the second air outlets (122) on both sides of the housing (1) are symmetrically arranged.

6. A dual-fan battery pack according to claim 2, characterized in that: The first fan (21) is fixedly connected to the side wall of the housing (1), and the second fan (22) is detachably connected to the top wall of the housing (1).

7. A dual-fan battery pack according to claim 2, characterized in that: The first fan (21) is an axial fan; the second fan (22) is a centrifugal fan.

8. A dual-fan battery pack according to claim 7, characterized in that: The second fan (22) is placed horizontally.

9. A dual-fan battery pack according to claim 1, characterized in that: An adjustable air guide plate is detachably connected inside the housing (1), and the heat dissipation airflow of the fan assembly (2) is guided through the adjustable air guide plate to the gap between the battery and the electronic components.

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