Heat dissipation structure and battery pack

Abstract

This application relates to the field of battery pack technology and provides a heat dissipation structure and a battery pack. The heat dissipation structure of this application is disposed on the housing of the battery pack to dissipate heat from the battery cells inside the housing. It includes a fan assembly capable of driving gas flow through the battery cells; an air inlet disposed on the housing to allow gas to enter the housing; a first vent disposed on the housing to guide the gas driven by the fan assembly to the outside; and a second vent comprising a second vent hole, a sealing member, and a driving member. The sealing member is slidably disposed within the second vent hole, and under the drive of the driving member, the sealing member can block or open the second vent hole. This application, through the design of the heat dissipation structure, can improve the heat dissipation efficiency within the battery pack, thereby improving the quality of battery pack performance.

Description

Technical Field

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

[0002] With the booming development of the new energy industry, the design of battery packs is also constantly changing. Battery packs used in small portable devices are not convenient to be cooled by liquid cooling systems due to their small size, so they are often cooled by air cooling structures.

[0003] Existing air-cooled heat dissipation structures require adjusting the fan speed based on the battery pack temperature when the internal temperature exceeds the suitable operating temperature range. It takes a period of time to reduce the battery pack temperature to the suitable operating temperature range. Furthermore, when the fan power is limited, there is a situation where the high temperature is difficult to reduce, which is not conducive to improving the performance of the battery pack. Utility Model Content

[0004] In view of this, this application aims to provide a heat dissipation mechanism to improve the performance of the battery pack.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] A heat dissipation structure is disposed on the housing of a battery pack to dissipate heat from the battery cells inside the housing, the heat dissipation structure comprising:

[0007] A fan assembly that can drive gas flow through the battery cell;

[0008] An air inlet is provided on the housing to allow gas to enter the housing;

[0009] A first vent is provided on the housing to guide the gas driven by the fan assembly to the outside.

[0010] The second venting part includes a second vent, a sealing member, and a driving member. The sealing member is slidably disposed in the second vent, and under the drive of the driving member, the sealing member can block or open the second vent.

[0011] Furthermore, it also includes a liquid cooling unit; the liquid cooling unit includes a heat exchange section for absorbing heat dissipation from the battery cell, a heat dissipation section disposed on the airflow path of the fan assembly, and a circulation pipeline connecting the heat exchange section and the heat dissipation section, and the circulation pipeline is provided with a pumping component.

[0012] Furthermore, the fan assembly includes a fan disposed within the housing, and the heat dissipation section is disposed on the air inlet side of the fan; and / or, the heat dissipation section includes a heat dissipation pipe and heat dissipation fins disposed on the heat dissipation pipe, and the heat dissipation pipe is connected to the heat exchange section through the circulation pipeline.

[0013] Furthermore, the fan assembly includes a fan disposed within the housing; the first venting portion includes a first vent hole disposed on the housing, and the air outlet side of the fan is disposed toward the first vent hole.

[0014] Furthermore, the driving unit includes a thermal expansion unit disposed within the housing; the thermal expansion unit is connected to the sealing member in a transmission manner, and when the temperature inside the housing rises, the thermal expansion unit expands under heat, driving the sealing member to slide, thereby opening the second vent hole.

[0015] Furthermore, the thermal expansion unit drives the sealing member to slide via a transmission unit; the transmission unit includes a transmission rod and a connecting rod disposed within the housing, the top of the thermal expansion unit abuts against the transmission rod to drive the transmission rod to move along the height direction of the housing; the connecting rod extends from the sealing member toward the transmission rod and is rotatably connected to the transmission rod to drive the sealing member to move when the transmission rod moves along the height direction of the housing.

[0016] Furthermore, the housing is provided with a support plate, which provides support for the connecting rod and / or the transmission rod when the sealing member blocks the second vent hole.

[0017] Furthermore, the thermal expansion unit is a copper plate, with the middle portion of the copper plate arching towards the top of the housing; and / or, the sealing member is provided with an elastic sealing element, which forms a seal between the sealing member and the second vent when the sealing member slides within the second vent.

[0018] Furthermore, the thermal expansion unit is a copper plate, with the middle part of the copper plate arching outwards towards the top of the housing; mounting grooves are provided on the side walls of opposite sides of the housing, and the two ends of the copper plate are respectively located in the mounting grooves on the corresponding sides.

[0019] Compared with the prior art, this application has the following advantages:

[0020] (1) The heat dissipation structure described in this application, through the setting of the fan assembly, the air inlet and the first vent, can drive the gas from the outside to enter through the fan assembly and flow through the cell for heat exchange. After the gas flows through the cell and exchanges heat with the cell, it is guided to the outside through the first vent. Thus, the cell is cooled by the gas flowing through the cell and exchanging heat with the cell, which helps to improve the cooling effect of the cell. Through the setting of the second vent, with the cooperation of the sealing member and the driving member, the second vent can be blocked or opened to increase the communication channel between the shell and the outside, which facilitates the increase of gas entering the shell and helps to improve the cooling effect of the battery pack.

[0021] (2) By setting up a liquid cooling unit, with the cooperation of the heat exchange section, the heat dissipation section and the circulation pipeline, the heat of the battery cell is absorbed by the heat exchange section, and the heat is pumped to the heat dissipation section through the coolant in the circulation pipeline. The heat is then discharged to the outside through the cooperation of the heat dissipation section and the fan assembly, which helps to improve the cooling effect of the battery cell and facilitates the design and implementation.

[0022] (3) By placing the heat dissipation unit on the air intake side of the fan, it is easier for the external airflow to pass through the heat dissipation unit, which helps to reduce the temperature of the coolant and ensure the cooling effect. The setting of heat dissipation pipes and heat dissipation fins helps to increase the heat exchange area between the airflow and the heat dissipation unit, which helps to better improve the heat dissipation effect of the heat dissipation unit and facilitates design implementation.

[0023] (4) By setting the air outlet side of the fan to face the first vent, it is easier to guide the gas driven by the fan assembly to the outside of the battery pack more quickly, which is conducive to improving the cooling effect of the battery cell and helps the design and implementation.

[0024] (5) By setting the thermal expansion unit, the sealing component can be driven to slide when the temperature inside the battery pack rises, thereby opening the second vent hole. The structure is simple and easy to design and implement.

[0025] (6) By setting up the transmission unit, it is easy for the thermal expansion unit to drive the sealing component to slide. The transmission unit includes a transmission rod and a connecting rod, which has a simple structure and is conducive to the thermal expansion unit to drive the sealing component to move better, thus facilitating the design and implementation.

[0026] (7) By setting the support plate, it is easy to limit the initial position of the connecting rod and the transmission rod, thus limiting the initial position of the sealing component. The structure is simple and easy to design and implement.

[0027] (8) By making the thermal expansion unit a copper plate and arching the middle of the copper plate toward the top of the shell, it is easier to drive the sealing component to slide when the copper plate is thermally expanded, which is conducive to design and implementation. The setting of the elastic seal helps to improve the sealing effect between the sealing component and the shell, which is also conducive to design and implementation.

[0028] (9) The installation groove facilitates the arrangement of the copper plate on the shell and helps to ensure the structural stability of the copper plate when it is thermally expanded, so that the copper plate can better drive the sealing component to slide when it is thermally expanded, which is conducive to design and implementation.

[0029] This application also proposes a battery pack, wherein the battery pack is provided with the heat dissipation structure described above.

[0030] The battery pack described in this application and the heat dissipation structure described above have the same beneficial effects as the prior art, so they will not be described again here. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 This is a schematic diagram of the heat dissipation structure described in the embodiments of this application;

[0033] Figure 2 This is a partial structural diagram of the heat dissipation structure described in an embodiment of this application from a first angle;

[0034] Figure 3 This is a partial structural diagram of the heat dissipation structure described in an embodiment of this application from a second angle;

[0035] Figure 4 This is a partial structural diagram of the heat dissipation structure described in the embodiments of this application from a third angle;

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Housing; 2. Fan assembly;

[0038] 3. First ventilation section;

[0039] 301. First vent hole;

[0040] 4. Second ventilation section;

[0041] 401. Second vent; 402. Drive unit; 403. Sealing component;

[0042] 4021. Thermal expansion unit; 4022. Transmission unit;

[0043] 40211, transmission rod; 40212, connecting rod;

[0044] 5. Support plate;

[0045] 501. First plate; 502. Second plate;

[0046] 6. Liquid cooling unit;

[0047] 601. Heat exchange section; 602. Heat dissipation section; 603. Circulation pipeline; 604. Pumping components. Detailed Implementation

[0048] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0050] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0052] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0054] An embodiment of the first aspect of this application provides a heat dissipation structure applied in a battery pack of a small portable device, mainly used to cool the battery cells. The heat dissipation structure of this embodiment, through its structural innovation, can increase the gas communication channels between the battery pack and the outside when the temperature inside the battery pack rises, which facilitates the temperature reduction inside the battery pack and helps to improve the quality of use of the battery pack.

[0055] In existing technologies, with the development of new energy technologies, battery pack designs are also constantly evolving. As the output power and charging rate of battery packs used in small portable devices increase, heat dissipation issues arise during use and charging. Due to the design requirements of battery packs in small portable devices, it is generally difficult to use a pure liquid cooling system for heat dissipation.

[0056] Therefore, battery packs for small portable devices often use air-cooling systems for heat dissipation. These systems typically include a fan, an air inlet, and an air outlet on the battery pack. The air inlet and outlet connect to the outside environment, and the fan drives the air to flow through the battery cells to cool them. However, when the temperature inside the battery pack increases rapidly in a short period of time, the fan speed adjustment takes time, which can cause the battery pack to operate within an unsuitable temperature range, potentially reducing the lifespan of the battery cells. Furthermore, even if the fan speed is increased within the fan's rated power, it is difficult to reduce the temperature inside the battery pack to a suitable operating range, which is detrimental to improving the battery pack's performance.

[0057] In view of this, in order to overcome the shortcomings of the prior art, the heat dissipation structure of this embodiment combines... Figures 1 to 4 As shown, the overall design includes a fan assembly 2, an air inlet, a first ventilator 3, and a second ventilator 4.

[0058] The fan assembly 2, the air inlet and the first vent 3 are all located on the housing 1. The fan assembly 2 can drive the gas flow, so that the gas enters the housing 1 from the air inlet, flows through the battery cell to cool the battery cell, and is then guided to the outside from the first vent 3.

[0059] The second vent 4 includes a second vent 401 provided on the housing 1, a sealing member 403 slidably provided in the second vent 401, and a driving part 402 capable of driving the sealing member 403 to move. Under the drive of the driving part 402, the sealing member 403 can block or open the second vent 401.

[0060] Therefore, through the arrangement of the fan assembly 2, the air inlet, and the first vent 3, the fan assembly 2 can drive the gas from the outside to enter and flow through the cell for heat exchange. After the gas flows through the cell and exchanges heat with it, it is guided to the outside through the first vent 3. This allows the cell to be cooled by the gas flowing through it and exchanging heat with it, which helps to improve the cooling effect of the cell. With the arrangement of the second vent 4, the second vent hole 401 can be blocked or opened with the cooperation of the sealing member 403 and the driving member 402, thereby increasing the communication channel between the housing 1 and the outside, which facilitates the increase of gas entering the housing 1 and helps to improve the cooling effect of the battery pack.

[0061] Based on the above overall introduction, specifically, as an exemplary structural form, the fan assembly 2 in this embodiment still consists of... Figures 1 to 4 As shown, it generally includes a fan installed inside the housing 1, with the air inlet side of the fan facing the battery cell and the air outlet side of the fan facing the first vent 3.

[0062] The above-mentioned fan assembly 2 serves as the airflow drive unit 402 in the overall heat dissipation structure, which is used to drive the gas to flow through the battery cell. The air intake side of the fan assembly 2 is set towards the battery cell, which facilitates driving the gas that enters the housing 1 through the air intake to flow through the battery cell. After exchanging heat with the battery cell to cool it, the gas is discharged from the housing 1 through the first vent 3.

[0063] In practical implementation, the fan can be assembled inside the housing 1 through a bracket located inside the housing 1. The assembly structure of the fan and housing 1, as well as the power source of the fan, can refer to the conventional arrangement in existing air-cooled heat dissipation systems, and will not be elaborated here.

[0064] It is worth noting that, in actual implementation, the aforementioned air intake can also be based on the relevant structure of the existing air-cooled heat dissipation system, and will not be elaborated further here.

[0065] Continue to combine Figures 1 to 4 As shown, in some exemplary embodiments, this embodiment may, for example, include a first vent 3 comprising a first vent 301 located on the housing 1, with the air outlet side of the fan assembly 2 facing the first vent 301. By aligning the air outlet side of the fan with the first vent 301, it is easier to guide the gas driven by the fan assembly 2 to the outside of the battery pack more quickly, thereby improving the cooling effect of the battery cells and facilitating design implementation.

[0066] It is worth mentioning that, in specific implementation, the first vent 301 and the air inlet are respectively arranged on opposite sides of the housing 1 so that the airflow can flow through the battery cell and cool the battery cell under the drive of the fan assembly 2, thereby improving the cooling effect of the battery cell.

[0067] In specific implementations, the first vent 301 can be arranged in the form of a circular hole, an oblong hole, or a strip-shaped hole. Of course, depending on the structure of the housing 1 or the different positions of the fan assembly 2, the number, shape, and position of the first vent 301 in the first vent section 3 can be adaptively adjusted, as long as it can guide the airflow driven by the fan assembly 2 to the outside.

[0068] It is worth noting that a grid plate or other structure can be provided on the first vent 301 to prevent debris from entering the interior of the housing 1. The connection method between the grid plate and the first vent 301 can refer to the existing grid plate arrangement method, and will not be described in detail here.

[0069] Continue to combine Figures 1 to 4 As shown, in some exemplary embodiments, this embodiment may, for example, have second vent holes 401 of the second vent portion 4 located on opposite sides of the housing 1, and each second vent hole 401 is provided with a sealing member 403.

[0070] It should be noted that each of the second vent holes 401 can be respectively set on the housing 1 on both sides of the battery cell according to the arrangement position of the battery cell. Furthermore, by setting the second vent holes 401 on the housing 1 on both sides of the battery cell according to the arrangement position of the battery cell, it can be understood that when they are opened, it is convenient for airflow to flow into the housing 1 from multiple positions and flow on the side of the battery cell, so as to improve the heat dissipation effect of the heat dissipation structure.

[0071] It is worth mentioning that the second vent 401 can be set in the form of a horn hole, for example, so as to facilitate the resetting of the sealing member 403 after opening the second vent 401. The horn hole forms a slope on the housing 1 to guide the sealing member 403, thus facilitating the resetting of the sealing member 403.

[0072] Furthermore, to better ensure the sealing effect of the sealing element 403 at the second vent 401, an elastic sealing element is provided on the sealing element 403. When the sealing element 403 slides within the second vent 401, the elastic sealing element forms a seal between the sealing element 403 and the second vent 401. The provision of the elastic sealing element helps to improve the sealing effect between the sealing element 403 and the housing 1, facilitating design and implementation.

[0073] Continue to combine Figures 1 to 4 As shown, taking the second vent 401 provided on the housing 1 on both sides of the battery cell as an example, in some exemplary embodiments, the drive unit 402 may include, for example, a thermal expansion unit 4021.

[0074] The thermal expansion unit 4021 is connected to the sealing member 403. When the temperature inside the housing 1 rises, the thermal expansion unit 4021 expands due to heat, causing the sealing member 403 to slide, thereby opening the second vent 401. The thermal expansion unit 4021 enables the sealing member 403 to slide when the temperature inside the battery pack rises, thus opening the second vent 401. This design is simple and easy to implement.

[0075] Specifically, for example, the thermal expansion unit 4021 can drive the sealing member 403 to slide via the transmission unit 4022. The transmission unit 4022 includes a transmission rod 40211 and a connecting rod 40212 disposed within the housing 1. The top of the thermal expansion unit 4021 abuts against the transmission rod 40211 to drive the transmission rod 40211 to move along the height direction of the housing 1. The connecting rod 40212 extends from the sealing member 403 toward the transmission rod 40211 and is rotatably connected to the transmission rod 40211. When the transmission rod 40211 moves along the height direction of the housing 1, the connecting rod 40212 drives the sealing member 403 to move. The transmission unit 4022 facilitates the thermal expansion unit 4021 to drive the sealing member 403 to slide. The transmission unit 4022, including the transmission rod 40211 and the connecting rod 40212, has a simple structure, which facilitates better driving of the sealing member 403 by the thermal expansion unit 4021, thus aiding in design and implementation.

[0076] It should be noted that when the transmission unit 4022 is located inside the housing 1, a support plate 5 is provided on the housing 1. When the sealing member 403 blocks the second vent 401, the support plate 5 provides support for the connecting rod 40212 and the transmission rod 40211. The support plate 5 may include, for example, a first plate 501 and a second plate 502. The first plate 501 extends from the inner wall of the housing 1 into the housing 1 and can support both ends of the transmission rod 40211 when the sealing member 403 blocks the second vent 401. The second plate 502 is mounted on the housing 1 and can support the connecting rod 40212 below when the sealing member 403 blocks the second vent 401. The support plate 5 facilitates limiting the initial position of the connecting rod 40212 and the transmission rod 40211, thereby defining the initial position of the sealing member 403. The structure is simple and easy to design and implement.

[0077] In a specific implementation, the thermal expansion unit 4021 can be, for example, a copper plate. The middle part of the copper plate is arched towards the top of the housing 1 and can abut against the transmission rod 40211. When the temperature inside the housing 1 rises, the copper plate absorbs heat and expands thermally. The arched middle part of the copper plate can abut against the bottom of the transmission rod 40211 and push the transmission rod 40211 to move vertically. Of course, the thermal expansion unit 4021 can also be other thermal expansion materials, as long as it can absorb heat and expand and recover when releasing heat.

[0078] In practical implementation, in order to facilitate the better assembly of the copper plate into the housing 1, an installation groove is provided on the side wall of the housing 1. Both ends of the copper plate are inserted into the installation groove. The installation groove facilitates the arrangement of the copper plate on the housing 1 and helps to ensure the structural stability of the copper plate when it is thermally expanded. This allows the copper plate to better drive the sealing component 403 to slide when it is thermally expanded, which is beneficial to the design and implementation.

[0079] It is worth mentioning that, in specific implementations, the drive unit 402 can be either driven by the thermal expansion unit 4021 to move the sealing member 403, or by other drive units such as an electric cylinder that can drive the sealing member 403 to slide within the second vent 401. It is only necessary that it can drive the sealing member 403 to open the second vent 401 when the temperature inside the battery pack is too high.

[0080] Continue to combine Figures 1 to 4 As shown, as an exemplary embodiment, the heat dissipation structure in this embodiment may also include a liquid cooling unit 6.

[0081] The liquid cooling unit 6 includes a heat exchange section 601 for absorbing heat from the battery cell, a heat dissipation section 602 provided in the airflow path of the fan assembly 2, and a circulation pipe 603 connecting the heat exchange section 601 and the heat dissipation section 602, and a pumping component 604 is provided on the circulation pipe 603.

[0082] In practical implementation, the heat dissipation section 602, heat exchange section 601, and circulation pipeline 603 are filled with coolant. The coolant is pumped through the heat exchange section 601 by the pumping component 604 (such as a micro pump) to absorb heat. After being cooled by heat exchange in the heat dissipation section 602, it continues to circulate to assist the fan assembly 2 in cooling the battery cell. Through the liquid cooling unit 6, in cooperation with the heat exchange section 601, heat dissipation section 602, and circulation pipeline 603, the heat from the battery cell is absorbed by the heat exchange section 601, and the heat is pumped through the coolant in the circulation pipeline 603 to the heat dissipation section 602. The heat is then dissipated to the outside through the cooperation of the heat dissipation section 602 and the fan assembly 2, thus improving the cooling effect of the battery cell and facilitating design implementation.

[0083] The heat dissipation unit 602 may include, for example, a heat dissipation pipe and heat dissipation fins disposed on the heat dissipation pipe. The heat dissipation pipe is connected to the heat exchange unit 601 through a circulation pipe 603. The specific connection method of the heat dissipation pipe and heat dissipation fins can be obtained by referring to the existing connection methods of heat dissipation pipes and heat dissipation fins. The arrangement of heat dissipation pipes and heat dissipation fins helps to increase the heat exchange area between the airflow and the heat dissipation unit 602, thereby helping to improve the heat dissipation effect of the heat dissipation unit 602 and facilitating design implementation.

[0084] It is worth mentioning that the heat dissipation unit 602 is arranged on the air intake side of the fan to facilitate airflow. By placing the heat dissipation unit 602 on the air intake side of the fan, it is easier for external airflow to pass through the heat dissipation unit 602, which helps to reduce the temperature of the coolant and ensure the cooling effect.

[0085] It is worth noting that, regarding the heat dissipation structure of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still based on... Figures 1 to 4 As shown, it may include, for example, a fan assembly 2, an air inlet, a first vent 3, a second vent 4, and a liquid cooling unit 6.

[0086] The fan assembly 2 includes a fan housed within the housing 1, with the fan's inlet side facing the air inlet and its outlet side facing the first vent 3. The air inlet is located on the housing 1 at the end of the housing 1 furthest from the first vent 3. The first vent 3 includes a first vent hole 301 on the housing 1, which is oblong in shape.

[0087] The second venting part 4 includes six second venting holes 401 provided on the housings 1 on both sides of the battery cell. There are three second venting holes 401 on each side of the housing 1. A sealing member 403 is slidably provided in each venting hole. The sealing member 403 completes the action of sealing the second venting hole 401 and opening the second venting hole 401 through the driving part 402 provided in the housing 1.

[0088] The drive unit 402 includes a thermal expansion unit 4021 and a transmission unit 4022 disposed in the housing 1. When the thermal expansion unit 4021 is heated and expands, it drives the transmission unit 4022 to operate. With the operation of the transmission unit 4022, the sealing member 403 can be driven to block or open the second vent 401.

[0089] The thermal expansion unit 4021 is a copper plate. Both ends of the copper plate are mounted on the housing 1 through mounting grooves. The middle part of the copper plate is provided to the top of the housing 1. The transmission unit 4022 includes a transmission rod 40211 disposed in the housing 1 and a connecting rod 40212 rotatably disposed on the transmission rod 40211 and connected to the sealing member 403. When the copper plate expands due to heat, the middle part of the copper plate can abut against the transmission rod 40211 and drive the transmission rod 40211 to move in the vertical direction, so as to drive the sealing member 403 to move through the connecting rod 40212.

[0090] The housing 1 is also provided with a support plate 5. The support plate 5 includes a first plate 501 for supporting both ends of the transmission rod 40211 and a second plate 502 for supporting the connecting rod 40212. When the sealing member 403 blocks the second vent 401, both the transmission rod 40211 and the connecting rod 40212 abut against the support plate 5.

[0091] The liquid cooling unit 6 includes a heat exchange section 601, a heat dissipation section 602, and a circulation pipe 603 disposed within the housing 1. The heat exchange section 601 and the heat dissipation section 602 are connected through the circulation pipe 603, and a pumping component 604 is provided on the circulation pipe 603. The heat exchange section 601 is located above the battery cell, and the heat dissipation section 602 is located on the air inlet side of the fan. Driven by the pumping component 604, the coolant in the heat exchange section 601, the heat dissipation section 602, and the circulation pipe 603 circulates, carrying away heat from the battery cell and directing it to the outside through the airflow driven by the fan.

[0092] In the above preferred embodiments, the specific configuration and arrangement of the fan assembly 2, air inlet, first ventilator 3, second ventilator 4, and liquid cooling unit 6 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the fan assembly 2, air inlet, first ventilator 3, second ventilator 4, and liquid cooling unit 6 can also be referred to the descriptions in the above exemplary embodiments.

[0093] The heat dissipation structure of this embodiment adopts the above design. With the arrangement of fan assembly 2, air inlet and first vent 3, the fan assembly 2 drives the gas from the outside to enter and flow through the cell for heat exchange. After the gas flows through the cell and exchanges heat with the cell, it is guided to the outside through the first vent 3. Thus, the cell is cooled by the gas flowing through the cell and exchanging heat with the cell, which helps to improve the cooling effect of the cell. With the arrangement of second vent 4, the driving part 402 includes a thermal expansion unit 4021, and the thermal expansion unit 4021 is a copper plate with an arched center. This makes it easy to drive the sealing part 403 to open the second vent 401 when the temperature inside the housing 1 rises, so as to increase the communication channel between the housing 1 and the outside, and facilitate the increase of gas entering the housing 1, which helps to improve the cooling effect of the battery pack.

[0094] An embodiment of the second aspect of this application provides a battery pack having a heat dissipation structure as described above.

[0095] In the battery pack of this embodiment, the heat dissipation structure can be provided inside the battery pack as a heat dissipation part 602. The arrangement position and arrangement method of each component in the heat dissipation structure can still be referred to the description in the above exemplary embodiments.

[0096] Furthermore, the battery pack in this embodiment is generally used in small portable devices as an energy storage component.

[0097] The battery pack of this embodiment, by setting the heat dissipation structure as described above, and by setting the fan assembly 2, the air inlet and the first vent 3, can drive the gas from the outside to enter through the fan assembly 2 and flow through the battery cell for heat exchange, and then guide it to the outside through the first vent 3. Thus, the battery cell is cooled by the gas flowing through the battery cell and exchanging heat with it, which helps to improve the cooling effect of the battery cell. By setting the second vent 4, and by making the drive part 402 include a thermal expansion unit 4021, and the thermal expansion unit 4021 is a copper plate with an arched center, it is convenient to drive the sealing member 403 to open the second vent 401 when the temperature inside the housing 1 rises, so as to increase the communication channel between the housing 1 and the outside, and to increase the gas entering the housing 1, which helps to improve the cooling effect of the battery pack.

[0098] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A heat dissipation structure disposed on the housing of a battery pack for dissipating heat from the battery cells inside the housing, characterized in that, The heat dissipation structure includes: A fan assembly that can drive gas flow through the battery cell; An air inlet is provided on the housing to allow gas to enter the housing; A first vent is provided on the housing to guide the gas driven by the fan assembly to the outside. The second venting part includes a second vent, a sealing member, and a driving member. The sealing member is slidably disposed in the second vent, and under the drive of the driving member, the sealing member can block or open the second vent.

2. The heat dissipation structure according to claim 1, characterized in that: It also includes a liquid cooling unit; The liquid cooling unit includes a heat exchange section for absorbing heat dissipation from the battery cell, a heat dissipation section disposed on the airflow path of the fan assembly, and a circulation pipeline connecting the heat exchange section and the heat dissipation section, wherein a pumping component is provided on the circulation pipeline.

3. The heat dissipation structure according to claim 2, characterized in that: The fan assembly includes a fan disposed within the housing, and the heat dissipation unit is disposed on the air inlet side of the fan; and / or, The heat dissipation section includes a heat dissipation pipe and heat dissipation fins disposed on the heat dissipation pipe. The heat dissipation pipe is connected to the heat exchange section through the circulation pipeline.

4. The heat dissipation structure according to claim 1, characterized in that: The fan assembly includes a fan disposed within the housing; The first venting portion includes a first vent hole provided on the housing, and the air outlet side of the fan assembly is disposed facing the first vent hole.

5. The heat dissipation structure according to any one of claims 1-4, characterized in that: The drive unit includes a thermal expansion unit disposed within the housing; The thermal expansion unit is connected to the sealing member. When the temperature inside the housing rises, the thermal expansion unit expands due to heat, causing the sealing member to slide, thereby opening the second vent.

6. The heat dissipation structure according to claim 5, characterized in that: The thermal expansion unit drives the sealing component to slide through the transmission unit; The transmission unit includes a transmission rod and a connecting rod disposed within the housing. The top of the thermal expansion unit abuts against the transmission rod to drive the transmission rod to move along the height direction of the housing. The connecting rod extends from the sealing member to the transmission rod and is rotatably connected to the transmission rod so as to drive the sealing member to move when the transmission rod moves along the height direction of the housing.

7. The heat dissipation structure according to claim 6, characterized in that: The housing is provided with a support plate, which provides support for the connecting rod and / or the transmission rod when the sealing member blocks the second vent hole.

8. The heat dissipation structure according to claim 5, characterized in that: The thermal expansion unit is a copper plate, with its middle portion arching outwards towards the top of the housing; and / or, The sealing member is provided with an elastic sealing element. When the sealing member slides within the second vent hole, the elastic sealing element forms a seal between the sealing member and the second vent hole.

9. The heat dissipation structure according to claim 8, characterized in that: The thermal expansion unit is a copper plate, and the middle part of the copper plate is arched out toward the top of the shell; Mounting grooves are provided on the side walls of the opposite sides of the housing, and the two ends of the copper plate are respectively located in the mounting grooves on the corresponding sides.

10. A battery pack, characterized in that: The battery pack is provided with a heat dissipation structure as described in any one of claims 1-9.

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