Battery pack heat dissipation structure and battery pack

Abstract

The present application relates to the technical field of battery heat dissipation, and discloses a battery pack heat dissipation structure and a battery pack, wherein the battery pack heat dissipation structure comprises a shell, a base, a medium inlet and a medium outlet located at both ends of the base, and a heat conductor, wherein the shell is used to install a battery module of the battery pack, the base is connected to the shell and has a receiving groove, wherein at least a part of the heat conductor is located in the receiving groove and forms a fluid cavity with the base, and one side of the heat conductor abuts against the surface of the battery module so that heat can be conducted from the battery module to the heat conductor, and then the cooling medium flows in the fluid cavity after being input through the medium inlet, thereby exchanging heat with the heat conductor to take away the heat of the heat conductor, which can effectively avoid direct contact between the cooling medium and the battery module, and accelerate the heat conduction efficiency through the heat conductor to disperse the heat of the battery module.

Description

Technical Field

[0001] The present application relates to the technical field of battery heat dissipation, and further to a battery pack heat dissipation structure and a battery pack. Background Art

[0002] In the current battery pack heat dissipation structure design, convection heat dissipation mechanism is generally used to manage the heat generated by the battery during operation. The cooling medium is introduced from both sides of the battery pack and takes away the heat by directly contacting the sides of the battery cells in the battery module. Subsequently, these cooling media with heat are gathered in the central area of ​​the battery pack and finally discharged uniformly.

[0003] However, this heat dissipation method has some limitations. First, the collection of heat in the center area of ​​the battery pack causes the temperature in this area to rise significantly, which not only reduces the heat dissipation efficiency, but also may have an adverse effect on the performance and life of the battery cell. Secondly, due to the uneven distribution of heat, the temperature at the air inlet of the battery cell is much lower than the temperature at the air outlet. The existence of this temperature difference will directly affect the consistency and life of the battery cell. In addition, direct contact between the cooling medium and the battery cell may cause potential problems such as condensation, thereby affecting the safe operation and long-term stability of the battery.

[0004] To sum up, the current problems need to be improved. Utility Model Content

[0005] In response to the above technical problems, the purpose of the present application is to provide a battery pack heat dissipation structure and a battery pack, aiming to achieve more uniform heat distribution and improve heat dissipation efficiency, while avoiding direct contact of the cooling medium with the battery cells, so as to improve the overall performance of the battery pack and the service life of the battery cells.

[0006] In order to achieve the above objectives, the present application provides a battery pack heat dissipation structure, including:

[0007] A housing for mounting a battery module in the battery pack;

[0008] A bottom support portion having a receiving groove, wherein the bottom support portion is connected to the housing;

[0009] A heat conducting member, at least part of which is located in the receiving groove and forms a fluid cavity with the bottom support portion, and one side of the heat conducting member abuts against the surface of the battery module so that heat can be transferred from the battery module to the heat conducting member;

[0010] The medium inlet and the medium outlet are respectively located at two ends of the base and are both connected to the fluid cavity. The medium inlet is used for the cooling medium to flow into the fluid cavity, and the medium outlet is used for the cooling medium to flow out of the fluid cavity.

[0011] It is worth mentioning that by designing one side of the heat conductor to directly abut the surface of the battery module, the heat generated by the battery module can be quickly transferred to the heat conductor, thereby improving the heat conduction efficiency and effectively dissipating the heat. On the other hand, the cooling medium flows in the fluid cavity to take away the heat, avoiding direct contact between the cooling medium and the battery module, reducing potential condensation and electrical safety risks.

[0012] In some embodiments, the housing has a hollow groove on one side close to the bottom support portion, and the bottom of the battery module is exposed through the hollow groove;

[0013] A surface of the heat conducting member on one side facing away from the bottom supporting portion is in contact with the bottom of the battery module.

[0014] It can be understood that the design of the hollow groove allows energy to be directly transferred from the battery module to the heat conductor, thereby improving the heat dissipation efficiency. The full contact between the heat conductor and the bottom of the battery module helps to disperse the heat more evenly and avoid localized heat accumulation.

[0015] In some embodiments, the heat conductive member includes a heat sink and a plurality of heat sink fins, the heat sink is attached to the bottom of the battery module, the heat sink fins are arranged on a surface of the heat sink facing the bottom support portion, and an extension direction of each heat sink fin is the same as an extension direction of the fluid cavity.

[0016] Here, the provision of the heat dissipation fins enhances the heat exchange in the fluid cavity, and improves the heat exchange efficiency by increasing the contact surface area between the cooling medium and the heat conducting member. The purpose of efficient heat conduction and efficient heat dissipation is achieved through the combined use of the heat dissipation plate and the heat dissipation fins.

[0017] In some embodiments, each of the heat dissipation fins is vertical to the surface of the heat dissipation plate, and an end of each of the heat dissipation fins facing away from the housing abuts against the bottom support portion;

[0018] There is a preset gap between two adjacent heat dissipation fins to divide the fluid channel into a plurality of auxiliary fluid channels.

[0019] It should be noted that the close contact between the ends of the heat dissipating fins and the base increases the number of supporting points between the heat conductor and the base, which helps to maintain the stability and integrity of the structure when the heat dissipating structure as a whole is subjected to external impact or vibration.

[0020] In some embodiments, the battery pack heat dissipation structure further includes a medium discharge module, which is connected to the shell or the base portion and communicates with the medium outlet to assist in the discharge of the cooling medium.

[0021] Providing a medium discharge module to ensure smooth discharge of the cooling medium helps prevent system overheating or performance degradation caused by the accumulation of hot cooling medium, thereby achieving the best heat dissipation effect in a limited battery pack heat dissipation structure without significantly increasing the volume or complexity of the battery pack heat dissipation structure.

[0022] In some embodiments, the cooling medium is a gas;

[0023] The medium discharge module comprises a fan and a fixed shell, the fixed shell is hollow inside, and the number of the fan is at least one and is arranged in the fixed shell, so that the fan pushes and discharges the gas in the fixed shell in a driven state;

[0024] The fixed shell is connected to the housing and the bottom support at the same time, and the bottom of the fixed shell is flush with the bottom of the bottom support, so that the medium outlet is connected with the interior of the fixed shell.

[0025] Here, the airflow generated by the fan can accelerate the flow of the cooling medium, so that the cooling medium can quickly flow out of the heat dissipation structure after heat exchange with the heat conductive member to take away the heat of the battery pack.

[0026] In some embodiments, the bottom support portion includes two parallel vertical sides and a bottom plate connecting the two vertical sides, and the receiving groove is formed by the bottom plate and the two vertical sides.

[0027] A plurality of the heat dissipation fins are evenly distributed on the heat dissipation plate to form a fin array, and the total width of the fin array is less than or equal to the width of the accommodating groove.

[0028] It can be understood that the receiving groove formed by the vertical edge of the bottom support and the bottom plate provides stable support and accommodation space for the heat dissipating fins, so that the heat dissipating fins can be accurately installed in the receiving groove in the form of a fin array, ensuring the optimal space utilization of the heat dissipating structure.

[0029] In some embodiments, the free end of each of the vertical edges extends away from the receiving groove and forms an extension portion, and the extension portion is parallel to the bottom plate;

[0030] The heat sink and the bottom support are arranged to match each other in width, wherein the extension portion, the heat sink and the housing are stacked in sequence and fixed by fasteners.

[0031] It is worth mentioning that under the action of external force, the battery pack may be displaced, and the components in the heat dissipation structure of the battery pack may also be easily displaced during the displacement process. The design of the extension part provides additional contact area and support points. The stacking arrangement with the heat dissipation plate and the shell and then fixed by fasteners can effectively improve the stability and reliability of the heat dissipation structure of the battery pack.

[0032] Another aspect of the present application also provides a battery pack, including:

[0033] A battery module, comprising at least one battery cell;

[0034] The above-mentioned battery pack heat dissipation structure is used to dissipate heat for the battery module.

[0035] In some embodiments, a plurality of partitions are provided in the battery module, and the plurality of partitions are spaced apart along the length direction of the battery module to divide the internal space of the battery module into a plurality of battery cell installation positions, and the number of the battery cell installation positions matches the battery cells, and is used to install the battery cells;

[0036] There are at least two battery modules, and each of the battery modules is connected in series via an electrical connector.

[0037] Compared with the prior art, the battery pack heat dissipation structure and battery pack provided in this application have the following features:

[0038] Beneficial effects:

[0039] 1. In the present application, by designing one side of the heat conductive member to directly abut the surface of the battery module, the heat generated by the battery module is quickly transferred to the heat conductive member, thereby improving the heat conduction efficiency and effectively dissipating the heat. On the other hand, the cooling medium flows in the fluid cavity to take away the heat, avoiding direct contact between the cooling medium and the battery module, and reducing potential condensation and electrical safety risks.

[0040] 2. In the present application, the provision of the heat dissipation fins enhances the heat exchange in the fluid cavity, and improves the heat exchange efficiency by increasing the contact surface area between the cooling medium and the heat-conducting member. The purpose of efficient heat conduction and efficient heat dissipation is achieved through the combined use of the heat dissipation plate and the heat dissipation fins. In addition, the end of the heat dissipation fin is in close contact with the bottom support portion, which increases the support points between the heat-conducting member and the bottom support portion, and is beneficial to improving the stability and reliability of the heat dissipation structure of the battery pack.

[0041] 3. In the present application, a medium discharge module is provided to ensure smooth discharge of the cooling medium, which helps prevent system overheating or performance degradation caused by accumulation of cooling medium with heat, thereby achieving the best heat dissipation effect in a limited battery pack heat dissipation structure without significantly increasing the volume or complexity of the battery pack heat dissipation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present application.

[0043] Figure 1 It is a schematic diagram of the explosion structure of an embodiment of the present application;

[0044] Figure 2 is a cross-sectional view of an embodiment of the present application;

[0045] Figure 3 is a schematic structural diagram of a housing in one embodiment of the present application;

[0046] Figure 4 is a schematic diagram of an exploded structure of an embodiment of the present application at another viewing angle;

[0047] Figure 5 is a schematic structural diagram of a heat conducting member and a bottom support portion in another embodiment of the present application;

[0048] Figure 6 is a schematic diagram of the overall structure of a battery pack in one embodiment of the present application;

[0049] Figure 7 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0050] Description of the accompanying drawings: shell 1; hollow groove 10; bottom support part 2; accommodating groove 20; bottom plate 21; vertical edge 22; extension part 23; heat conducting member 3; heat sink 31; heat sink fin 32; medium inlet 4; medium outlet 5; fluid cavity 6; battery module 7; battery cell 71; partition 72; fan 81; fixed shell 82. DETAILED DESCRIPTION

[0051] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0052] In order to simplify the drawings, only the parts related to the application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0053] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0054] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0057] At present, convection heat dissipation mechanism is mainly used to manage the heat generated by the battery during operation. However, this traditional heat dissipation design has several key problems. First, the limitation of fluid cavity design makes it impossible to distribute the cooling medium evenly to each battery cell. This unevenness causes temperature differences during the operation of the device, which directly affects the number of cycles of the battery cell and the service life of the entire device.

[0058] Secondly, in order to distribute the cooling medium as evenly as possible, the complexity of the heat dissipation structure design increases, which not only increases the difficulty of design, but also leads to an increase in cost. On the other hand, this design requires the battery pack to have an input and output port for the cooling medium, so that the heat exchange cycle is completed inside the battery pack. This results in a lower protection level for the battery pack, which is easily affected by problems such as electrical dust accumulation.

[0059] The utility model aims to solve the above problems of the prior art. Figure 1 and Figure 2A battery pack heat dissipation structure provided in the present application can achieve more uniform heat distribution and improve heat dissipation efficiency, while preventing the cooling medium from directly contacting the battery module 7, so as to improve the overall performance of the battery pack and the service life of the battery module 7.

[0060] Reference Manual Attached Figure 1 and Figure 2 The present application provides a heat dissipation structure for a battery pack, comprising a shell 1, a bottom bracket 2, a heat conductive member 3, a medium inlet 4 and a medium outlet 5, wherein the shell 1 is used to install a battery module 7 in the battery pack, and the bottom bracket 2 is connected to the shell 1. The bottom bracket 2 has a receiving groove 20, and the heat conductive member 3 is at least partially located in the receiving groove 20, and forms a fluid cavity 6 with the bottom bracket 2, and one side of the heat conductive member 3 abuts against the surface of the battery module 7, so that heat can be transferred from the battery module 7 to the heat conductive member 3.

[0061] At the same time, the battery pack heat dissipation structure also includes a medium inlet 4 and a medium outlet 5, which are respectively located on both sides of the base 2 and are both connected to the fluid cavity 6. The medium inlet 4 is used for the cooling medium to flow into the fluid cavity 6, and the medium outlet 5 is used for the cooling medium to flow out of the fluid cavity 6.

[0062] It is worth mentioning that by designing one side of the heat conductor 3 to directly abut the surface of the battery module 7, the heat generated by the battery module 7 is quickly transferred to the heat conductor 3, thereby improving the heat conduction efficiency and effectively dissipating the heat; on the other hand, the cooling medium flows in the fluid cavity 6 to take away the heat, thereby avoiding direct contact between the cooling medium and the battery module 7.

[0063] The heat dissipation structure of the battery pack in this embodiment can solve many problems in the prior art. First, by combining direct conduction and convection heat dissipation, the heat accumulation inside the battery pack is reduced, the operating temperature of the battery cell is lowered, and the service life of the battery pack is extended. Secondly, the design of the fluid cavity 6 promotes the uniform distribution of the cooling medium, avoiding the degradation of the battery cell performance caused by uneven cooling.

[0064] In one embodiment, based on the above embodiment, referring to the attached Figure 3 The shell 1 has a hollow groove 10 on one side close to the bottom bracket 2 , the bottom of the battery module 7 is exposed through the hollow groove 10 , and the surface of the heat conducting member 3 facing away from the bottom bracket 2 is in contact with the bottom of the battery module 7 .

[0065] It can be understood that the design of the hollow groove 10 allows the bottom of the battery module 7 to be directly exposed, thereby achieving more effective thermal contact with the heat conductor 3, that is, the heat conductor 3 and the bottom of the battery module 7 can be fully contacted, thereby improving the efficiency of heat transfer from the battery module 7 to the heat conductor 3. Through the design in this embodiment, the heat generated by the battery module 7 can be quickly dispersed through the heat conductor 3, rather than accumulating inside the battery pack as in traditional designs.

[0066] Moreover, the design of the hollow groove 10 also avoids unnecessary accumulation of heat inside the battery pack, reducing the risk of overheating of the battery cell 71. It should also be noted that by adjusting the design of the hollow groove 10 and the bottom bracket 2 on the shell 1, it is possible to adapt to battery modules 7 of different sizes and shapes, and provide customized heat dissipation solutions for battery packs of various models. In addition, the material and shape of the heat conductor 3 can be optimized according to specific needs to achieve optimal heat conduction performance.

[0067] In addition, based on the above content, it can be known that the accommodating groove 20 on the bottom bracket 2 not only provides stable support for the heat-conducting member 3, but also forms an efficient heat exchange environment in combination with the fluid cavity 6. The cooling medium enters the fluid cavity 6 through the medium inlet 4, exchanges heat with the heat-conducting member 3, and then is discharged through the medium outlet 5 to take away the heat, thereby achieving effective heat dissipation of the battery module 7.

[0068] In one embodiment, Figure 4 and Figure 5 As shown, the heat conducting member 3 includes a heat sink 31 and a plurality of heat sink fins 32. The heat sink 31 is attached to the bottom of the battery module 7. The heat sink fins 32 are all arranged on the surface of the heat sink 31 facing the bottom support 2, and the extension direction of each heat sink fin 32 is the same as the extension direction of the fluid cavity 6.

[0069] The heat dissipation fins 32 are evenly distributed on the surface of the heat dissipation plate 31 facing the bottom support portion 2, and their extension direction is consistent with the extension direction of the fluid cavity 6. Therefore, when the cooling medium enters the fluid cavity 6 through the medium inlet 4, the heat dissipation fins 32 guide the cooling medium to flow evenly through the bottom of the battery module 7, perform efficient heat exchange with the heat dissipation plate 31, and then be discharged through the medium outlet 5 to take away the heat.

[0070] This design effectively solves several key problems existing in the heat dissipation structure of traditional battery packs. First, the orderly arrangement and directional consistency of the heat dissipation fins 32 ensure the uniform distribution of the cooling medium at the bottom of the battery module 7, avoiding the problem of local overheating. Secondly, the direct contact between the heat dissipation plate 31 and the bottom of the battery module 7 improves the heat conduction efficiency, helps to maintain the uniformity of the temperature of the battery cell 71, and prolongs the service life of the battery. In addition, the design of the heat dissipation fins 32 can also optimize the flow characteristics of the cooling medium, further improving the heat dissipation efficiency.

[0071] In another embodiment, each of the heat dissipation fins 32 is vertical to the surface of the heat dissipation plate 31 , and the end of each heat dissipation fin 32 facing away from the housing 1 abuts against the bottom support 2 .

[0072] It should be noted that the close contact between the ends of the heat dissipation fins 32 and the base 2 increases the number of support points between the heat conductor 3 and the base 2, which helps to maintain the stability and integrity of the structure when the heat dissipation structure as a whole is subjected to external impact or vibration.

[0073] In addition, there is a preset gap between two adjacent heat dissipation fins 32 to divide the fluid cavity 6 into a number of auxiliary fluid cavities, which promotes the uniform distribution of the cooling medium at the bottom of the battery module 7 and enhances the fluidity and heat exchange efficiency of the fluid. Through these auxiliary fluid cavities, the cooling medium can more efficiently absorb and take away the heat generated by the battery module 7, thereby reducing the temperature difference between the battery cells 71 and improving the overall thermal stability of the battery pack. On the other hand, the design of the heat dissipation fins 32 allows the heat dissipation area to be increased without increasing the volume of the battery pack, which can improve the heat dissipation performance of the heat dissipation structure of the battery pack.

[0074] In addition, the preset gap can be adjusted according to the size of the battery module 7, and the flow efficiency of the cooling medium also needs to be considered, which is not specifically limited in this embodiment.

[0075] In one embodiment, the heat dissipation structure of the battery pack further includes a medium discharge module, which further improves the flow efficiency and heat dissipation performance of the cooling medium. The medium discharge module is directly connected to the housing 1 or the bottom bracket 2 of the battery pack to ensure smooth connection with the medium outlet 5.

[0076] The medium discharge module can assist the cooling medium to be discharged smoothly out of the battery pack. In this process, it not only improves the heat dissipation efficiency, but also helps to maintain the pressure balance in the fluid cavity 6. Through the active action of the medium discharge module, the cooling medium can be effectively prevented from being retained inside the battery pack, thereby reducing the problem of decreased heat exchange efficiency caused by fluid retention.

[0077] In addition, the medium discharge module can be combined with the design of the heat sink 31, the heat sink fins 32 and the fluid cavity 6 in the above embodiment to form an efficient and orderly heat exchange system. After the cooling medium flows through the battery module 7, the heat sink 31 and the heat sink fins 32, it carries the heat and is discharged through the medium discharge module, thereby completing the entire heat exchange cycle.

[0078] In one embodiment, the cooling medium is a gas, such as Figure 1 and Figure 2As shown, the medium discharge module includes a fan 81 and a fixed shell 82. The fixed shell 82 is hollow inside. There is at least one fan 81 and it is arranged in the fixed shell 82, so that the fan 81 pushes and discharges the gas in the fixed shell 82 when driven.

[0079] It should be noted that in this embodiment, the cooling medium is gas, which can adapt to the output of the fan 81 relative to the gas. If the cooling medium is liquid, then the liquid passing through the fan 81 may cause corrosion of the blades and other phenomena, affecting the life and performance of the fan 81, and the efficiency of the fan 81 in discharging the liquid is low, which will affect the discharge efficiency of the cooling medium. However, in other embodiments, the cooling medium is liquid. In this case, first of all, the battery module 7 needs to be well sealed to prevent the cooling medium from penetrating from the gaps in the battery pack. In addition, the medium discharge module can use a pump component to discharge the liquid.

[0080] In this embodiment, the airflow generated by the fan 81 can accelerate the flow of the cooling medium, so that the cooling medium can quickly flow out of the heat dissipation structure after heat exchange with the heat conductor 3 to take away the heat of the battery pack. In addition, through the protection of the fixed shell 82, the fan 81 is not easily damaged by the outside world, and foreign matter is also prevented from entering the heat dissipation structure, thereby improving the safety and reliability of the battery pack.

[0081] At the same time, the driving state of the fan 81 can be intelligently adjusted according to the actual heat load of the battery pack, so that the heat dissipation of the battery pack is more targeted.

[0082] Furthermore, the fixed shell 82 is connected to the shell 1 and the bottom support 2 at the same time, and the bottom of the fixed shell 82 is flush with the bottom of the bottom support 2, so that the medium outlet 5 is connected to the interior of the fixed shell 82. Not only does it ensure the neatness and compactness of the structure, but it also achieves a seamless connection between the medium outlet 5 and the interior of the fixed shell 82. This precise alignment provides a direct and unobstructed discharge path for the cooling medium, thereby reducing the resistance to gas flow and optimizing the heat dissipation performance. At the same time, this design also takes into account the sealing and protection level of the heat dissipation structure, and improves the safety and reliability of the battery pack through the protective effect of the fixed shell 82.

[0083] In one embodiment, Figure 4 As shown, the bottom bracket 2 includes two parallel vertical edges 22 and a bottom plate 21 connecting the two vertical edges 22. The receiving groove 20 is formed by the bottom plate 21 and the two vertical edges 22, which cleverly provides installation space for the heat dissipation fins 32 and the heat conducting member 3, and also provides a certain channel for the flow of the cooling medium. On the other hand, the uniformity and continuity of the flow of the cooling medium are ensured, the dead corner of the gas flow is avoided, and the heat dissipation effect is further improved.

[0084] Moreover, the plurality of heat dissipating fins 32 in the above embodiment are evenly distributed on the heat dissipating plate 31 to form a fin array, and the total width of the fin array is less than or equal to the width of the receiving groove 20, thereby ensuring that the heat dissipating fins 32 can be completely installed in the receiving groove 20, while avoiding unnecessary encroachment on the internal space of the battery pack, making the entire heat dissipation structure more compact and space utilization more efficient.

[0085] In another embodiment, the free end of each vertical edge 22 extends in a direction away from the accommodating groove 20 and forms an extension portion 23, the extension portion 23 is parallel to the bottom plate 21, the heat sink 31 and the base portion 2 having the extension portion 23 are arranged to match the width, wherein the extension portion 23, the heat sink 31 and the housing 1 are stacked in sequence and fixed by fasteners.

[0086] In this embodiment, the design of the extension 23 not only enhances the mechanical stability of the base 2, but also provides additional surface area, which helps to better fix the heat sink 31 and ensure close contact between the heat sink fins 32 and the heat sink 31. Secondly, by fixing these components with fasteners, the stability of the heat dissipation structure during the operation of the battery pack can be ensured to prevent displacement or damage caused by vibration or impact.

[0087] In one embodiment, the reference specification Figure 6 and Figure 7 According to another aspect of the present application, the present application further provides a battery pack, including the above-mentioned battery pack heat dissipation structure and a battery module 7, the battery module 7 includes at least one battery cell 71, the battery pack heat dissipation structure can dissipate heat for the battery module 7, ensuring that the battery pack can dissipate heat efficiently during operation and maintain the battery cell 71 operating within an optimal temperature range, thereby extending the battery life and ensuring performance.

[0088] Based on the above embodiment, the number of battery modules 7 is at least two, and each battery module 7 is connected in series through an electrical connector to provide the required voltage and current. As shown in the figure, the number of battery modules 7 is two at this time, and the number of battery cells 7 in each battery module 7 is 8. Of course, in other embodiments, the number of battery modules 7 and the number of battery cells 71 therein should be increased or decreased according to the size of the battery pack or the actual power generation demand.

[0089] Furthermore, if Figure 7 As shown, a plurality of partitions 72 are arranged in the battery module 7, and the plurality of partitions 72 are arranged at intervals along the length direction of the battery module 7 to divide the internal space of the battery module 7 into a plurality of battery cell 71 installation positions, and the number of the battery cell 71 installation positions matches the battery cells 71 for installing the battery cells 71.

[0090] In addition, the partition 72 can also be made of insulating material to enhance the electrical safety of the battery module 7. While improving the thermal management performance, the partition 72 also provides necessary mechanical support for the battery cell 71, reducing the risk of damage to the battery cell 71 due to vibration or impact.

[0091] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A battery pack heat dissipation structure, characterized in that: include: A housing for mounting a battery module in the battery pack; A bottom support portion having a receiving groove, wherein the bottom support portion is connected to the housing; A heat conducting member, at least part of which is located in the receiving groove and forms a fluid cavity with the bottom support portion, and one side of the heat conducting member abuts against the surface of the battery module so that heat can be transferred from the battery module to the heat conducting member; The medium inlet and the medium outlet are respectively located at two ends of the base and are both connected to the fluid cavity. The medium inlet is used for the cooling medium to flow into the fluid cavity, and the medium outlet is used for the cooling medium to flow out of the fluid cavity.

2. The heat dissipation structure of the battery pack according to claim 1, characterized in that: The shell has a hollow groove on one side close to the bottom support portion, and the bottom of the battery module is exposed through the hollow groove; A surface of the heat conducting member on one side facing away from the bottom supporting portion is in contact with the bottom of the battery module.

3. The heat dissipation structure of the battery pack according to claim 2, characterized in that: The heat conducting member comprises a heat sink and a plurality of heat sink fins. The heat sink is attached to the bottom of the battery module. The heat sink fins are arranged on a surface of the heat sink facing the bottom support portion, and an extension direction of each heat sink fin is the same as an extension direction of the fluid cavity.

4. The heat dissipation structure of the battery pack according to claim 3, characterized in that: Each of the heat dissipation fins is vertical to the surface of the heat dissipation plate, and the end of each of the heat dissipation fins facing away from the housing abuts against the bottom support; There is a preset gap between two adjacent heat dissipation fins to divide the fluid channel into a plurality of auxiliary fluid channels.

5. The heat dissipation structure of a battery pack according to any one of claims 1 to 4, characterized in that: It also includes a medium discharge module, which is connected to the shell or the base, and is communicated with the medium outlet to assist in the discharge of the cooling medium.

6. The heat dissipation structure of the battery pack according to claim 5, characterized in that: The cooling medium is gas; The medium discharge module includes a fan and a fixed shell, the fixed shell is hollow inside, and the number of the fan is at least one and is arranged in the fixed shell, so that the fan pushes and discharges the gas in the fixed shell in a driven state; The fixed shell is connected to the housing and the bottom support at the same time, and the bottom of the fixed shell is flush with the bottom of the bottom support, so that the medium outlet is connected with the interior of the fixed shell.

7. The heat dissipation structure of the battery pack according to claim 3 or 4, characterized in that: The bottom support portion includes two parallel vertical sides and a bottom plate connecting the two vertical sides, and the receiving groove is formed by the bottom plate and the two vertical sides. A plurality of the heat dissipation fins are evenly distributed on the heat dissipation plate to form a fin array, and the total width of the fin array is less than or equal to the width of the accommodating groove.

8. The heat dissipation structure of the battery pack according to claim 7, characterized in that: The free end of each of the vertical edges extends away from the receiving groove to form an extension portion, and the extension portion is parallel to the bottom plate; The heat sink and the bottom support are arranged to match each other in width, wherein the extension portion, the heat sink and the housing are stacked in sequence and fixed by fasteners.

9. A battery pack, characterized in that: include: A battery module, comprising at least one battery cell; The battery pack heat dissipation structure according to any one of claims 1 to 8 is used to dissipate heat for the battery module.

10. The battery pack according to claim 9, characterized in that: A plurality of partitions are arranged in the battery module, and the plurality of partitions are arranged at intervals along the length direction of the battery module to divide the internal space of the battery module into a plurality of battery cell installation positions, the number of which matches the battery cells, and is used to install the battery cells; There are at least two battery modules, and each of the battery modules is connected in series via an electrical connector.

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