Battery pack heat dissipation structure and battery pack

Abstract

The utility model belongs to battery technical field discloses battery pack heat radiation structure and battery pack, battery pack heat radiation structure includes casing, fin and fan, casing is used for installing in the outer wall of battery pack, and closes the opening, and the casing is made of heat conducting material, can conduct heat of the inner chamber of battery pack to the side of casing away from the inner chamber of battery pack, the fin is set up in the side of casing away from the inner chamber of battery pack, and has the cold end for heat absorption and the hot end for heat release, the cold end is attached with casing, thereby through the heat absorption of cold end and the heat release of hot end, the heat of casing is conducted to the hot end, the fan is connected to casing, and has the air inlet end for air intake and the air outlet end for air outlet, and at least a portion of air inlet end is opposite to the hot end and sets up, thereby the heat of hot end is blown out, in addition, since the air inlet end is opposite to the hot end and sets up, makes the heat transfer efficiency between fin and fan be higher, thereby promotes the heat dissipation efficiency of battery pack heat radiation structure.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack heat dissipation structure and a battery pack. Background Technology

[0002] For heat dissipation of battery packs, liquid cooling or air cooling is commonly used. However, liquid cooling has the problems of high cost and weight, and external liquid coolers require a lot of space. Air cooling, on the other hand, has the problems of low heat dissipation efficiency, poor environmental adaptability, and inability to meet the current high-rate charging and discharging conditions.

[0003] In response, a related technology provides a battery heat dissipation control fixture, in which two semiconductor heat sinks are respectively installed on the two walls of the battery. The semiconductor heat sinks are connected to fins through heat exchange tubes, and fans are installed on the fins. This allows the heat from the battery walls to be discharged sequentially through the semiconductor heat sinks, heat exchange tubes, fins, and fans. This solution achieves battery heat dissipation by using semiconductor heat sinks and fans, which can solve the problems of liquid cooling and air cooling. However, the heat conduction between the fan and the semiconductor heat sink needs to be indirectly achieved through heat exchange tubes and fins, so the heat dissipation efficiency is still relatively low. Utility Model Content

[0004] According to one aspect of the present invention, a battery pack heat dissipation structure is provided to solve the problem that in the prior art, heat conduction between the fan and the semiconductor heat sink needs to be indirectly achieved through heat exchange tubes and fins, and the heat dissipation efficiency is still low.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A battery pack heat dissipation structure is installed on the outer wall of the battery pack, wherein the outer wall of the battery pack has an opening communicating with the inner cavity of the battery pack; the battery pack heat dissipation structure includes:

[0007] A housing for mounting on the outer wall of the battery pack and sealing the opening, the housing being made of a thermally conductive material;

[0008] A heat sink is disposed on the side of the housing opposite to the inner cavity of the battery pack, and has a cold end for absorbing heat and a hot end for releasing heat, the cold end being in contact with the housing;

[0009] A fan, connected to the housing, has an air inlet for drawing in air and an air outlet for discharging air, with at least a portion of the air inlet facing the hot end.

[0010] As a preferred embodiment of the battery pack heat dissipation structure, the housing has a receiving cavity, which is separated from the inner cavity of the battery pack by the housing. The heat sink and the fan are both disposed in the receiving cavity, and the fan is used to blow the gas in the receiving cavity to the outside of the receiving cavity.

[0011] As a preferred embodiment of the battery pack heat dissipation structure, the cold end is attached to the bottom wall of the receiving cavity, and a fan mounting component is protruding from the bottom wall of the receiving cavity, with the fan connected to the fan mounting component.

[0012] As a preferred embodiment of the battery pack heat dissipation structure, the housing also has an installation port communicating with the receiving cavity. The housing is connected to a cover plate, which is disposed on the side wall of the installation port and is used to close the installation port. The cover plate has ventilation holes, and the air outlet is positioned directly opposite the ventilation holes.

[0013] As a preferred embodiment of the battery pack heat dissipation structure, multiple heat sinks and multiple fans are provided, with each heat sink and fan corresponding to the other one-to-one.

[0014] As a preferred embodiment of the battery pack heat dissipation structure, the housing includes a main body and a connecting plate disposed on the outer side of the main body. The heat sink and the fan are both connected to the main body. The main body is disposed in the opening, and the connecting plate is connected to the outer wall of the battery pack.

[0015] As a preferred embodiment of the battery pack heat dissipation structure, a sealing ring is also provided between the connecting plate and the outer wall of the battery pack.

[0016] As a preferred embodiment of the battery pack heat dissipation structure, it also includes an external connector for connecting to a power source, wherein the heat sink and the fan are both electrically connected to the external connector.

[0017] According to another aspect of the present invention, a battery pack is provided, including the above-described battery pack heat dissipation structure, and further including an outer wall. The battery pack has an inner cavity for placing battery cells, and the outer wall has an opening communicating with the inner cavity. The housing is mounted on the outer wall and closes the opening.

[0018] As a preferred embodiment of the battery pack, a thermally conductive medium is filled between the battery cell and the casing.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a battery pack heat dissipation structure for mounting on the outer wall of a battery pack. The outer wall of the battery pack has an opening communicating with the inner cavity of the battery pack. The battery pack heat dissipation structure includes a shell, heat sinks, and a fan. The shell is mounted on the outer wall of the battery pack and closes the opening. The shell is made of a thermally conductive material, which can conduct heat from the inner cavity of the battery pack to the side of the shell away from the inner cavity of the battery pack. The heat sink is located on the side of the shell away from the inner cavity of the battery pack and has a cold end for absorbing heat and a hot end for releasing heat. The cold end is in contact with the shell, so that the heat of the shell is conducted to the hot end through heat absorption at the cold end and heat release at the hot end. The fan is connected to the shell and has an air inlet for drawing air and an air outlet for discharging air. The air inlet is directly opposite the hot end, so that the heat from the hot end is blown out. This battery pack heat dissipation structure allows the heat from the inner cavity of the battery pack to be discharged sequentially through the shell, heat sinks, and fan. In addition, since the air inlet and the hot end are directly opposite each other, the heat transfer efficiency between the heat sink and the fan is high, thereby improving the heat dissipation efficiency of the battery pack heat dissipation structure.

[0021] This utility model also provides a battery pack, including the above-mentioned battery pack heat dissipation structure, and an outer wall. The battery pack has an inner cavity for placing the battery cells, and the outer wall has an opening communicating with the inner cavity. The shell is installed on the outer wall and closes the opening. The battery pack heat dissipation structure enables the heat of the inner cavity of the battery pack to be discharged sequentially through the shell, heat sink and fan. In addition, since the air inlet end and the hot end are arranged facing each other, the heat transfer efficiency between the heat sink and the fan is high, thereby improving the heat dissipation efficiency of the battery pack heat dissipation structure and giving the battery pack good heat dissipation performance to avoid overheating of the battery cells. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the battery pack heat dissipation structure in an embodiment of this utility model;

[0023] Figure 2 This is an exploded view of the battery pack heat dissipation structure in an embodiment of this utility model;

[0024] Figure 3 This is a partial structural schematic diagram of the battery pack heat dissipation structure in an embodiment of this utility model;

[0025] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0026] In the picture:

[0027] 1. Shell; 101. Receiving cavity; 102. Mounting port; 11. Main body; 12. Connecting plate;

[0028] 2. Heat sink; 21. Cold end; 22. Hot end;

[0029] 3. Fan; 31. Air inlet; 32. Air outlet; 33. Fan mounting hardware; 331. Intermediate section; 332. Extension section;

[0030] 4. Cover plate; 401. Ventilation hole; 41. Cover plate connecting piece; 411. First connecting end; 412. Second connecting end;

[0031] 5. Sealing ring;

[0032] 6. External connectors. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] Related technologies provide a battery heat dissipation control fixture, in which two semiconductor heat sinks are respectively arranged on the two walls of the battery. The semiconductor heat sinks are connected to fins through heat exchange tubes, and fans are arranged on the fins. This allows the heat from the battery walls to be discharged sequentially through the semiconductor heat sinks, heat exchange tubes, fins, and fans. This solution achieves battery heat dissipation by using semiconductor heat sinks and fans, which can solve the problems of liquid cooling and air cooling. However, the heat conduction between the fan and the semiconductor heat sink needs to be indirectly achieved through heat exchange tubes and fins, so the heat dissipation efficiency is still low.

[0038] In response, this embodiment provides a battery pack heat dissipation structure to solve the problem that in the prior art, heat conduction between the fan and the semiconductor heat sink needs to be indirectly achieved through heat exchange tubes and fins, resulting in low heat dissipation efficiency. This structure can be used in the field of battery technology.

[0039] Reference Figures 1-4 The battery pack heat dissipation structure is installed on the outer wall of the battery pack, and the outer wall of the battery pack has an opening that communicates with the inner cavity of the battery pack. The battery pack heat dissipation structure includes a shell 1, a heat sink 2, and a fan 3. The shell 1 is installed on the outer wall of the battery pack and closes the opening. The shell 1 is made of a thermally conductive material, which can conduct heat from the inner cavity of the battery pack to the side of the shell 1 away from the inner cavity of the battery pack. The heat sink 2 is located on the side of the shell 1 away from the inner cavity of the battery pack and has a cold end 21 for absorbing heat and a hot end 22 for releasing heat. The cold end 21 is in contact with the shell 1, so that the heat of the shell 1 is conducted to the hot end 3 through the absorption of heat by the cold end 21 and the release of heat by the hot end 22. The fan 3 is connected to the housing 1 and has an air inlet 31 for drawing air and an air outlet 32 ​​for discharging air. At least a portion of the air inlet 31 is positioned opposite the hot end 22, thereby blowing out the heat from the hot end 22. This battery pack heat dissipation structure enables the heat inside the battery pack to be discharged sequentially through the housing 1, the heat sink 2, and the fan 3. Furthermore, since the air inlet 31 is positioned opposite the hot end 22, the heat transfer efficiency between the heat sink 2 and the fan 3 is high, thereby improving the heat dissipation efficiency of the battery pack heat dissipation structure.

[0040] In this embodiment, the heat sink 2 is specifically a semiconductor heat sink. After being powered on, the semiconductor heat sink can absorb heat from the cold end 21 and release heat from the hot end 22, so as to realize the conduction of heat from the cold end 21 to the hot end 22. Its specific structure and principle are already relatively mature technologies in the field, and will not be described in detail here.

[0041] Continue to refer to Figures 1-4The housing 1 has a receiving cavity 101, which is separated from the inner cavity of the battery pack. The heat sink 2 and the fan 3 are both located in the receiving cavity 101. The fan 3 is used to blow the gas in the receiving cavity 101 to the outside of the receiving cavity 101, so that the housing 1 can provide a certain degree of protection for the heat sink 2 and the fan 3. In addition, this arrangement can also embed part of the battery pack heat dissipation structure into the inside of the battery pack, which can save installation space.

[0042] As an alternative, the housing 1 does not have a receiving cavity 101, but is only a plate-like structure that can close the opening. This makes the battery pack heat dissipation structure protrude from the outer wall of the battery pack, which can also achieve heat dissipation. However, although this solution does not occupy the internal space of the battery pack, its overall outward protrusion will occupy external space. In addition, it cannot provide effective protection for the heat sink 2 and the fan 3.

[0043] Continue to refer to Figures 1-4 To minimize the space occupied by the battery pack's heat dissipation structure within the battery pack, the housing 1 can be designed as a flat shape. Correspondingly, the bottom wall of the receiving cavity 101 is relatively large, while the side walls are relatively short. To accommodate this structure, both the heat sink 2 and the fan 3 are connected to the bottom wall of the receiving cavity 101. Specifically, the cold end 21 is in contact with the bottom wall of the receiving cavity 101, and a fan mounting member 33 protrudes from the bottom wall of the receiving cavity 101. The fan 3 is connected to the fan mounting member 33, thereby indirectly connecting to the bottom wall of the receiving cavity 101. Optionally, the fan mounting member 33 is U-shaped and has a middle section 331 and two extension sections 332 respectively connected to the two ends of the middle section 331. The two extension sections 332 are parallel and spaced apart. One extension section 332 is connected to the bottom wall of the receiving cavity 101, and the fan 3 is mounted on the other extension section 332.

[0044] Continue to refer to Figures 1-4 The housing 1 also has a mounting port 102 communicating with the receiving cavity 101. A cover plate 4 is connected to the housing 1. The cover plate 4 is disposed on the side wall of the mounting port 102 and is used to close the mounting port 102. The cover plate 4 has a ventilation hole 401, with the air outlet 32 ​​facing the ventilation hole 401. This allows the mounting port 102 to be closed by the cover plate 4, further preventing damage to the heat sink 2 and fan 3 from external structures. Simultaneously, by providing the ventilation hole 401, the air blown out by the fan 3 can be discharged through the ventilation hole 401 without affecting the heat dissipation effect. Optionally, the cover plate 4 is connected to the housing 1 via a cover plate connecting piece 41. Specifically, the cover plate connecting piece 41 is L-shaped and has a first connecting end 411 and a second connecting end 412 arranged at an angle. The first connecting end 411 is connected to the housing 1, and the second connecting end 412 is connected to the cover plate 4.

[0045] Continue to refer to Figures 1-4Multiple heat sinks 2 and multiple fans 3 are provided, with each heat sink 2 and fan 3 corresponding to one another, so that the heat of the housing 1 has multiple heat dissipation paths, thereby improving the heat dissipation effect of the battery pack heat dissipation structure.

[0046] Continue to refer to Figures 1-4 The housing 1 includes a main body 11 and a connecting plate 12 disposed on the outside of the main body 11. The heat sink 2 and the fan 3 are both connected to the main body 11, and the receiving cavity 101 and the mounting port 102 are both located in the main body 11. The main body 11 is disposed in the opening, and the connecting plate 12 is connected to the outer wall of the battery pack, so that the housing 1 and the outer wall of the battery pack are connected through the connecting plate 12. The two are in surface contact, which facilitates connection and can improve the sealing effect.

[0047] Continue to refer to Figures 1-4 A sealing ring 5 is also provided between the connecting plate 12 and the outer wall of the battery pack to further improve the sealing effect between the connecting plate 12 and the outer wall of the battery pack, so that the battery pack can meet the sealing requirements and ensure the IP protection level of the battery pack.

[0048] Continue to refer to Figures 1-4 The battery pack heat dissipation structure also includes an external connector 6, which is used to connect to a power source. The heat sink 2 and the fan 3 are both electrically connected to the external connector 6, thus simultaneously connecting the heat sink 2 and the fan 3 to the power source, which supplies power to the heat sink 2 and the fan 3. The heat sink 2 and the fan 3 can use an external power source or the battery cells of the battery pack as a power source. Optionally, the external connector 6 is embedded in the cover plate 4, with one end located inside the receiving cavity 101 and the other end extending outside the receiving cavity 101.

[0049] This embodiment also provides a battery pack, including the above-mentioned battery pack heat dissipation structure, and an outer wall. The battery pack has an inner cavity for placing the battery cells, and the outer wall has an opening communicating with the inner cavity. The housing 1 is installed on the outer wall and closes the opening. The battery pack heat dissipation structure enables the heat of the inner cavity of the battery pack to be discharged sequentially through the housing 1, the heat sink 2, and the fan 3. In addition, since the air inlet 31 and the hot end 22 are arranged opposite each other, the heat transfer efficiency between the heat sink 2 and the fan 3 is high, thereby improving the heat dissipation efficiency of the battery pack heat dissipation structure and enabling the battery pack to have good heat dissipation performance to avoid overheating of the battery cells.

[0050] Optionally, a thermally conductive medium is filled between the battery cell and the casing 1 to improve the thermal conductivity between the battery cell and the casing 1. The thermally conductive medium can be a solid filler made of thermally conductive material or a liquid thermally conductive medium.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery pack heat dissipation structure, characterized in that, For mounting on the outer wall of a battery pack, the outer wall of the battery pack has an opening communicating with the inner cavity of the battery pack; the battery pack heat dissipation structure includes: A housing (1) is used to be installed on the outer wall of the battery pack and to close the opening, the housing (1) being made of a thermally conductive material; A heat sink (2) is disposed on the side of the housing (1) away from the inner cavity of the battery pack, and has a cold end (21) for absorbing heat and a hot end (22) for releasing heat, wherein the cold end (21) is in contact with the housing (1); A fan (3) is connected to the housing (1) and has an air inlet (31) for drawing air and an air outlet (32) for discharging air, at least a portion of the air inlet (31) being positioned opposite the hot end (22).

2. The battery pack heat dissipation structure according to claim 1, characterized in that, The housing (1) has a receiving cavity (101), which is separated from the inner cavity of the battery pack by the housing (1). The heat sink (2) and the fan (3) are both disposed in the receiving cavity (101), and the fan (3) is used to blow the gas in the receiving cavity (101) to the outside of the receiving cavity (101).

3. The battery pack heat dissipation structure according to claim 2, characterized in that, The cold end (21) is attached to the bottom wall of the receiving cavity (101), and the bottom wall of the receiving cavity (101) is provided with a fan mounting part (33), and the fan (3) is connected to the fan mounting part (33).

4. The battery pack heat dissipation structure according to claim 2, characterized in that, The housing (1) also has an installation port (102) communicating with the receiving cavity (101). The housing (1) is connected to a cover plate (4). The cover plate (4) is disposed on the side wall of the installation port (102) and is used to close the installation port (102). The cover plate (4) has a ventilation hole (401). The air outlet (32) is positioned opposite to the ventilation hole (401).

5. The battery pack heat dissipation structure according to any one of claims 1-4, characterized in that, Multiple heat sinks (2) are provided, and multiple fans (3) are provided, with each heat sink (2) and each fan (3) corresponding to one another.

6. The battery pack heat dissipation structure according to any one of claims 1-4, characterized in that, The housing (1) includes a main body (11) and a connecting plate (12) disposed on the outside of the main body (11). The heat sink (2) and the fan (3) are both connected to the main body (11). The main body (11) is disposed in the opening. The connecting plate (12) is connected to the outer wall of the battery pack.

7. The battery pack heat dissipation structure according to claim 6, characterized in that, A sealing ring (5) is also provided between the connecting plate (12) and the outer wall of the battery pack.

8. The battery pack heat dissipation structure according to any one of claims 1-4, characterized in that, It also includes an external connector (6) for connecting to a power source, and the heat sink (2) and the fan (3) are both electrically connected to the external connector (6).

9. A battery pack, characterized in that, The battery pack includes a heat dissipation structure as described in any one of claims 1-8, and further includes an outer wall. The battery pack has an inner cavity for placing battery cells. The outer wall has an opening communicating with the inner cavity. The housing (1) is mounted on the outer wall and closes the opening.

10. The battery pack according to claim 9, characterized in that, A thermally conductive medium is filled between the battery cell and the housing (1).

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