Battery heat dissipation structure

Abstract

The utility model relates to the field of battery heat dissipation, and discloses a battery heat dissipation structure which comprises a heat dissipation frame, a shell (1), a cooling fan (2) arranged at the top of the shell (1), a ventilation grid (3) arranged at the bottom of the shell (1) and matched with the cooling fan (2), and a bearing boss (4) protruding out of the plane where the ventilation grid (3) is located. The bearing boss (4) is used for supporting the heat dissipation frame. The heat dissipation frame is sleeved in the shell (1), the heat dissipation frame comprises a plurality of first cooling sleeves (5) for accommodating battery cells (10), the outer walls of the plurality of first cooling sleeves (5) are provided with cooling fins (51), and the cooling fins (51) are vertically arranged along the height direction of the first cooling sleeves (5). The battery heat dissipation structure can perform forced heat exchange on the battery module through the fan.

Description

Technical Field

[0001] The utility model relates to the field of battery heat dissipation, and particularly to a battery heat dissipation structure. Background Art

[0002] In high-power applications of batteries, such as when used in electric vehicles, the battery may overheat due to high temperature, resulting in performance degradation, shortened lifespan, and even safety risks. The overheating of the battery may be caused by factors such as high-temperature environment, high-power charging and discharging, and charging imbalance. However, due to space and heat dissipation structure limitations, the current battery thermal management efficiency is still not high, and hot spots often appear in the position close to the center of the battery module. Summary of the Utility Model

[0003] In order to overcome the problem of low battery thermal management efficiency existing in the prior art, the utility model provides a battery heat dissipation structure, which can perform forced heat exchange on the battery module through a fan.

[0004] In order to achieve the above purpose, the utility model provides a battery heat dissipation structure, which includes a heat dissipation frame, a housing, and a cooling fan arranged on the top of the housing. A ventilation grille matching with the cooling fan and a load-bearing boss protruding from the plane where the ventilation grille is located are arranged at the bottom of the housing, and the load-bearing boss is used to support the heat dissipation frame;

[0005] The heat dissipation frame is sleeved in the housing. The heat dissipation frame includes a plurality of first cooling sleeves for accommodating battery cells, and cooling fins are arranged on the outer walls of the plurality of first cooling sleeves, and the cooling fins are arranged vertically along the height direction of the first cooling sleeves.

[0006] Preferably, a heat-conducting silica gel is arranged between the battery cell and the first cooling sleeve.

[0007] Preferably, a second cooling sleeve is arranged between adjacent first cooling sleeves, and the second cooling sleeve is connected to the first cooling sleeve through the cooling fins.

[0008] Preferably, the battery heat dissipation structure further includes a fixing bracket, the fixing bracket is detachably connected to the heat dissipation frame, and the fixing bracket is detachably connected to the housing. Through the fixing bracket, the housing realizes the support for the heat dissipation frame.

[0009] Preferably, a plurality of fixing brackets are arranged, and the plurality of fixing brackets are evenly distributed along the bottom of the heat dissipation frame to support the heat dissipation frame.

[0010] Preferably, the fixing bracket is placed on the load-bearing boss.

[0011] Preferably, the fixed bracket includes an upper bracket and a lower bracket, the upper bracket and the lower bracket are detachably connected, and the heat dissipation frame is located between the upper bracket and the lower bracket.

[0012] Preferably, the upper bracket and the lower bracket are respectively arranged in a U shape, and the heat dissipation frame is located within the frame formed by enclosing the two U shapes up and down;

[0013] Both ends of the U shape extend horizontally to form connection ends, the upper bracket and the lower bracket are connected through the connection ends, and support holes matching the connection ends are provided on the housing.

[0014] Preferably, internal threads are respectively provided at both ends of the second cooling sleeve, and the upper bracket and the lower bracket are respectively detachably connected to the internal threads at both ends of the second cooling sleeve.

[0015] Preferably, hollow holes are respectively provided on the upper bracket and the lower bracket, and the hollow holes on the upper bracket and the hollow holes on the lower bracket are arranged in one-to-one correspondence and alignment.

[0016] According to the above technical solution, after the cooling fan is turned on, cooling air will be drawn from outside the housing into the housing through the ventilation grille. Therefore, when the cooling fan is turned on, there is stable and continuous cooling air in the housing to cool the inside of the housing.

[0017] The battery cell is placed in the first cooling sleeve. When the battery cell is in a high-power working state, the heat released by it will first be conducted to the first cooling sleeve and further transferred to the cooling fins on the outer wall of the first cooling sleeve. And the cooling fins are exposed in the area where the cooling air in the housing passes. The cooling air contacts the surface of the cooling fins and takes away the heat on the surface of the cooling fins, thereby achieving the cooling effect on the battery cell.

[0018] It can be clearly seen from the above heat dissipation process principle that this battery heat dissipation structure increases the heat dissipation surface in the housing that contacts the cooling air by setting the cooling fins, thereby improving the cooling efficiency inside the battery.

[0019] Moreover, the cooling fins are arranged vertically, so that channels distributed in the vertical direction are formed between adjacent cooling fins. After the cooling fan is turned on, the air in the housing will flow in these channels. Since the direction of the channels is consistent with the direction of the cooling fan's action on the air flow, the efficiency of gas circulation is the highest.

[0020] Therefore, by adopting this cooling structure with the cooperation of the cooling fan and the cooling fins, it is possible to improve the passing efficiency of the cooling air while increasing the contact area, and further improve the cooling effect of this battery heat dissipation structure.

[0021] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0022] Figure 1 is a schematic structural view of a battery heat dissipation structure excluding the housing;

[0023] Figure 2 is a perspective view of a battery heat dissipation structure;

[0024] Figure 3 is a schematic structural view of a housing;

[0025] Figure 4 is a top view of a heat dissipation frame.

[0026] Description of the Reference Numerals

[0027] 1 Housing 2 Cooling Fan

[0028] 3 Air Vent Grille 4 Load-Bearing Boss

[0029] 5 First Cooling Sleeve 51 Cooling Fins

[0030] 53 Second Cooling Sleeve 611 Upper Bracket

[0031] 612 Lower Bracket 613 Connection End

[0032] 11 Support Hole 614 Hollow Hole

[0033] 10 Battery Cell 615 Connection Hole Detailed Description of the Embodiment

[0034] In the present utility model, unless otherwise stated, the orientation terms such as "away from, upper, lower, side, both ends" generally refer to the orientation of the term in its normal use state, or the common name understood by those skilled in the art, and should not be regarded as a limitation of the term.

[0035] Refer to Figures 1-4 the described battery heat dissipation structure, which includes a heat dissipation frame, a housing 1, a cooling fan 2 disposed on the top of the housing 1, a ventilation grille 3 cooperating with the cooling fan 2 and a load-bearing boss 4 protruding from the plane where the ventilation grille 3 is located at the bottom of the housing 1, and the load-bearing boss 4 is used to support the heat dissipation frame;

[0036] The heat dissipation frame is sleeved inside the housing 1, and the heat dissipation frame includes a plurality of first cooling sleeves 5 for accommodating battery cells 10. Cooling fins 51 are disposed on the outer walls of the plurality of first cooling sleeves 5, and the cooling fins 51 are vertically arranged along the height direction of the first cooling sleeves 5.

[0037] After the implementation of the above technical solution, after the cooling fan 2 is turned on, cooling air will be drawn into the housing 1 from outside the housing 1 through the air grille 3. Therefore, when the cooling fan 2 is turned on, there is stable and continuous cooling air in the housing 1 to cool the inside of the housing 1.

[0038] The battery cell 10 is placed in the first cooling sleeve 5. When the battery cell 10 is in a high-power working state, the heat released by it will first be conducted to the first cooling sleeve 5 and further transferred to the cooling fins 51 on the outer wall of the first cooling sleeve 5. The cooling fins 51 are exposed in the area where the cooling air in the housing 1 passes. The cooling air contacts the surface of the cooling fins 51 and takes away the heat on the surface of the cooling fins 51, thereby achieving the cooling effect on the battery cell 10.

[0039] It can be clearly seen from the above heat dissipation process principle that this battery heat dissipation structure increases the heat dissipation surface in the housing 1 that contacts the cooling air by setting the cooling fins 51, thereby improving the cooling efficiency inside the battery.

[0040] Moreover, the cooling fins 51 are arranged vertically, so that channels distributed in the vertical direction will be formed between adjacent cooling fins 51. After the cooling fan 2 is turned on, the air in the housing 1 will flow in these channels. Since the direction of the channels is consistent with the direction of the cooling fan's action on the air flow, the efficiency of gas circulation is the highest.

[0041] Preferably, multiple cooling fans 2 can be provided. The multiple cooling fans 2 are distributed at various positions on the top of the housing 1 so as to be able to cover the top area of the housing 1. The multiple cooling fans 2 work simultaneously to extract the air in the housing 1, making the air renewal efficiency in the housing 1 faster, and enabling cooling air flows through each position on the cross-section of the housing 1, so that the effect of the cooling air can cover the entire cross-section of the housing 1.

[0042] Since the battery cells 10 are more concentrated at the central position in the housing 1 and hot spots are likely to appear, therefore, the cooling fan 2 at the central position on the top of the housing 1 can be set to have a larger power. This cooling fan 2 with a larger power can achieve a higher cooling efficiency for the central position of the housing 1 and avoid untimely heat dissipation at the central position of the housing 1 due to the concentration of the battery cells 10.

[0043] At the same time, in order to cooperate with the cooling fan 2, on the premise of ensuring strength, the air grille 3 at the bottom of the housing 1 should be set as much as possible, so as to provide a greater flow rate for the cold air entering the housing 1. Preferably, the coverage rate of the air grille 3 at the bottom of the housing 1 should not be less than 30%.

[0044] In this embodiment, preferably, a thermal conductive silicone is provided between the battery cell 10 and the first cooling sleeve 5.

[0045] By setting the thermal conductive silicone, on the one hand, the stability of the battery cell 10 in the first cooling sleeve 5 can be ensured, avoiding relative shaking between the battery cell 10 and the first cooling sleeve 5; on the other hand, the thermal conductive silicone can also effectively transfer the heat of the battery cell 10 to the heat dissipation frame, and further the cooling air takes away this heat, avoiding the risk caused by overheating of the battery cell 10.

[0046] In this embodiment, preferably, a second cooling sleeve 53 is arranged between adjacent first cooling sleeves 5, and the second cooling sleeve 53 is connected to the first cooling sleeve 5 through cooling fins 51.

[0047] Such as Figure 4 As shown in the figure, setting the second cooling sleeve 53 can, on the one hand, increase the structural strength of the heat dissipation frame. At the same time, increasing the second cooling sleeve 53 can also increase the area of contact between the heat dissipation frame and the cooling air. Preferably, the second cooling sleeve 53 is set as a cylindrical shape with both ends open. The outer surface of the cylindrical second cooling sleeve 53 can contact the cooling air for heat dissipation. At the same time, a flow channel for the cooling air can be formed inside it. Therefore, both the inner wall and the outer wall of the second cooling sleeve 53 can achieve the effect of heat dissipation, making the heat dissipation frame have a better heat dissipation effect.

[0048] In this embodiment, preferably, the battery heat dissipation structure further includes a fixing bracket. The fixing bracket is detachably connected to the heat dissipation frame, and the fixing bracket is detachably connected to the housing 1. Through the fixing bracket, the housing 1 realizes the lifting of the heat dissipation frame.

[0049] Since there are also multiple battery cells 10 arranged in the heat dissipation frame and the self-weight will be relatively large, after the heat dissipation frame is placed in the housing 1, there are relatively high requirements for the strength of the bottom of the housing 1 and the load-bearing boss 4. In order to meet the support requirements for the heat dissipation frame, the thickness of the housing 1 needs to be increased, and at the same time, the support surface of the load-bearing boss 4 also needs to be set larger.

[0050] Increasing the thickness of the housing 1 will increase the manufacturing cost of the battery, and increasing the support area of the load-bearing boss 4 will squeeze the space of the ventilation grille 3, making it difficult for the layout density of the ventilation grille 3 to meet the passing requirements of the cooling air. Therefore, a fixing bracket is set to be detachably connected to the heat dissipation frame, and through the fixing bracket, part of the support function for the heat dissipation frame is transferred from the bottom of the housing 1 to other surfaces of the housing 1.

[0051] In one embodiment, the fixing bracket is arranged in a U shape. The U-shaped fixing bracket is arranged at the bottom of the heat dissipation frame and detachably connected to the heat dissipation frame. The fixing bracket realizes the lifting and supporting of the heat dissipation frame. Subsequently, the fixing bracket can be fixed to other surfaces of the housing 1 except the bottom surface by detachable means such as bolt connection, which can reduce the strength requirement of the heat dissipation frame for the bottom surface of the housing 1. Preferably, the fixing bracket is fixed to two side surfaces of the housing 1, and the two side surfaces jointly realize the supporting effect on the heat dissipation frame, so that the force on each side surface can be improved.

[0052] In one embodiment, as Figure 2 shown, the fixing bracket is detachably connected to the two side walls of the housing 1, so that the self-weight of part of the heat dissipation frame is borne by the side walls on both sides of the housing 1, thereby reducing the strength requirement for the bottom of the housing 1. On the one hand, the thickness of the bottom of the housing 1 can be slightly reduced. More importantly, the supporting area of the load-bearing boss 4 can also be correspondingly reduced, so that the ventilation grille 3 can cover more areas of the bottom of the housing 1.

[0053] In this embodiment, preferably, a plurality of fixing brackets are provided, and the plurality of fixing brackets are evenly distributed along the bottom of the heat dissipation frame to lift the heat dissipation frame.

[0054] In order to improve the stress condition at the connection position between the fixing bracket and the housing 1, a plurality of fixing brackets can be provided, and the plurality of fixing brackets are evenly distributed along the bottom of the heat dissipation frame, so that the weight of the heat dissipation frame is distributed on the plurality of fixing brackets, improving the stress condition of the housing 1.

[0055] Preferably, as Figure 2 shown, if the fixing bracket is provided with mounting holes, and a support mechanism matching with the mounting holes is provided outside the battery, the battery can be fixed to the support structure through the mounting holes. After the installation is completed, the support mechanism will mainly realize the supporting effect on the whole battery, and the housing 1 will no longer realize the supporting effect on the heat dissipation frame.

[0056] In this embodiment, preferably, the fixing bracket is placed on the load-bearing boss 4.

[0057] Through the load-bearing boss 4, there is a certain gap between the heat dissipation frame and the bottom of the housing 1. A part of the air can be cached in this gap. When the cooling fan 2 is turned on, efficient heat exchange can be quickly realized inside the housing 1.

[0058] In this embodiment, preferably, the fixing bracket includes an upper bracket 611 and a lower bracket 612. The upper bracket 611 and the lower bracket 612 are detachably connected, and the heat dissipation frame is located between the upper bracket 611 and the lower bracket 612.

[0059] The fixed bracket is set in a way that the upper bracket 611 and the lower bracket 612 are spliced together, which is beneficial to the installation work of the fixed bracket.

[0060] Moreover, by splicing the upper bracket 611 and the lower bracket 612, the fixed bracket can surround the heat dissipation frame for one week, which is beneficial to the stability of the heat dissipation frame in the housing 1.

[0061] In this embodiment, preferably, the upper bracket 611 and the lower bracket 612 are respectively set in a U shape, and the heat dissipation frame is located within the frame formed by the two U shapes enclosing up and down;

[0062] Both ends of the U shape extend horizontally to form connection ends 613. The upper bracket 611 and the lower bracket 612 are connected through the connection ends 613, and the housing 1 is provided with support holes 11 that cooperate with the connection ends 613.

[0063] As Figure 3 shown, in one embodiment, one side of the housing 3 is fixed, and the connection ends 613 of the upper bracket 611 and the lower bracket 612 can be conveniently inserted into the support holes 11 on this side. After the installation position of the heat dissipation frame is determined, then the other side of the housing 11 is installed in place. By the cooperation of the connection ends 613 and the support holes 11 on this side, the positioning effect on this side can be achieved. After this side is installed in place and fixed with other surfaces of the housing 1, the installation of the housing 1 can be completed.

[0064] In this embodiment, preferably, internal threads are respectively provided at both ends of the second cooling sleeve 53, and the upper bracket 611 and the lower bracket 612 are respectively detachably connected to the internal threads at both ends of the second cooling sleeve 53.

[0065] In order to achieve the detachable connection between the fixed bracket and the heat dissipation frame, internal threads are respectively provided at both ends of the second cooling sleeve 53, and connection holes are respectively provided at corresponding positions of the upper bracket 611 and the lower bracket 612. By respectively connecting the connection holes of the upper bracket 611 and the lower bracket 612 with the internal threads at both ends of the second cooling sleeve 53 through bolts, the upper bracket 611 and the lower bracket 612 can be respectively fixed above and below the heat dissipation frame.

[0066] Preferably, the connection ends 613 are set at the middle position, then the upper bracket 611 and the lower bracket 612 have the same shape, can be interchangeably used, which is convenient for production and also convenient for operators to install.

[0067] In this embodiment, preferably, hollow holes 614 are respectively provided on the upper bracket 611 and the lower bracket 612, and the hollow holes 614 of the upper bracket 611 and the hollow holes 614 of the lower bracket 612 are arranged in one-to-one correspondence and alignment.

[0068] Since both the upper bracket 611 and the lower bracket 612 have a certain width, after the upper bracket 611 and the lower bracket 612 are installed in place, they will obstruct the cooling air in the housing 1. Providing hollow holes 614 on the upper bracket 611 and the lower bracket 612 can reduce the obstruction to the cooling air and improve the cooling efficiency in the housing 1.

[0069] When the hollow holes 614 of the upper bracket 611 and the hollow holes 614 of the lower bracket 612 are arranged in one-to-one correspondence and aligned, a channel for the cooling air can be formed between the upper and lower hollow holes 614. And this channel is arranged in the vertical direction, which is consistent with the air extraction direction of the cooling fan 2, and the air flow throughness of the cooling air is the best.

[0070] Preferably, the hollow holes 614 of the upper bracket 611 and the lower bracket 612 are both symmetrically arranged, so that the upper bracket 611 and the lower bracket 612 still have interchangeability.

[0071] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0072] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable way without contradiction. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0073] In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, it should also be regarded as the content disclosed by the present invention.

Claims

1. A battery heat dissipation structure, characterized in that: The battery heat dissipation structure comprises a heat dissipation frame, a shell (1), and a cooling fan (2) arranged on the top of the shell (1); the bottom of the shell (1) is provided with a ventilation grille (3) matched with the cooling fan (2) and a load-bearing boss (4) protruding from the plane where the ventilation grille (3) is located; the load-bearing boss (4) is used to support the heat dissipation frame; The heat dissipation frame is sleeved in the shell (1), and comprises a plurality of first cooling sleeves (5) for accommodating the battery cells (10). The outer walls of the plurality of first cooling sleeves (5) are provided with cooling fins (51), and the cooling fins (51) are vertically arranged along the height direction of the first cooling sleeves (5).

2. The battery heat dissipation structure according to claim 1, characterized in that: Thermally conductive silica gel is provided between the battery core (10) and the first cooling sleeve (5).

3. The battery heat dissipation structure according to claim 1, characterized in that: A second cooling sleeve (53) is arranged between adjacent first cooling sleeves (5), and the second cooling sleeve (53) is connected to the first cooling sleeve (5) via the cooling fins (51).

4. The battery heat dissipation structure according to claim 3, characterized in that: The battery heat dissipation structure further comprises a fixing bracket, the fixing bracket being detachably connected to the heat dissipation frame, the fixing bracket being detachably connected to the shell (1), and the shell (1) supports the heat dissipation frame through the fixing bracket.

5. The battery heat dissipation structure according to claim 4, characterized in that: A plurality of fixing brackets are provided, and the plurality of fixing brackets are evenly distributed along the bottom of the heat dissipation frame to support the heat dissipation frame.

6. The battery heat dissipation structure according to claim 5, characterized in that: The fixing bracket is placed on the load-bearing boss (4).

7. The battery heat dissipation structure according to claim 5, characterized in that: The fixed bracket comprises an upper bracket (611) and a lower bracket (612); the upper bracket (611) is detachably connected to the lower bracket (612); and the heat dissipation frame is located between the upper bracket (611) and the lower bracket (612).

8. The battery heat dissipation structure according to claim 7, characterized in that: The upper bracket (611) and the lower bracket (612) are respectively arranged in a U shape, and the heat dissipation frame is located in a frame formed by the upper and lower U shapes; The two ends of the U-shape extend in a horizontal direction to form connecting ends (613), the upper bracket (611) and the lower bracket (612) are connected via the connecting ends (613), and the housing (1) is provided with a supporting hole (11) that matches the connecting end (613).

9. The battery heat dissipation structure according to claim 7, characterized in that: Internal threads are respectively provided at both ends of the second cooling sleeve (53), and the upper bracket (611) and the lower bracket (612) are respectively detachably connected to the internal threads at both ends of the second cooling sleeve (53).

10. The battery heat dissipation structure according to claim 8, characterized in that: The upper bracket (611) and the lower bracket (612) are respectively provided with hollow holes (614), and the hollow holes (614) of the upper bracket (611) and the hollow holes (614) of the lower bracket (612) are aligned and arranged in a one-to-one correspondence.

Images