Air-cooled battery pack system

Abstract

The present application relates to the technical field of battery packs, and discloses an air-cooled battery pack system, which specifically includes a battery module, a top cover, a first shell, a thermal pad, and a bottom support. The first shell has a chamber, an upper opening, and a lower opening. The battery module is arranged in the chamber. The battery module includes a plurality of battery cells. The top cover is fixed to the first shell from the upper opening side, and the thermal pad is fixed to the first shell from the lower opening side, forming a closed space for accommodating the battery module. The heat generated by the battery cell during operation is conducted to the thermal pad through the bottom of the battery module; the bottom support is connected to the side of the first shell away from the top cover, and there is a heat dissipation duct between the bottom support and the thermal pad. The air inlet and air outlet of the heat dissipation duct are respectively located on opposite sides of the first shell. The cold air exchanges heat with the thermal pad through the heat dissipation duct and then carries the heat out from the air outlet to achieve effective heat dissipation. The design of the closed space improves the sealing performance and prevents foreign matter from entering the battery pack and causing damage to the battery module.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and further to an air-cooled battery pack system. Background Art

[0002] The air-cooled battery packs currently on the market mainly adopt an open structure design to achieve radiation and convection heat dissipation of the battery cells. However, the design of this air-cooled battery pack generally ignores the sealing. The air ducts are usually arranged on both sides or the rear of the battery pack, and the battery cells are cooled by direct air supply. During the long-term operation of the battery pack, dust is easily accumulated inside the battery pack, which not only hinders the heat dissipation of the battery cells, but may also cover the connection rows and pole ears, increasing the risk of short circuits in high humidity environments. Moreover, when the operating temperature of the equipment is significantly different from the ambient temperature, it is also easy to cause internal condensation and moisture accumulation.

[0003] In summary, there is a need to improve the current technology. Utility Model Content

[0004] In view of the above-mentioned technical problems, the purpose of the utility model is to provide an air-cooled battery pack system, aiming to solve the problems in the existing air-cooled battery pack design, provide a confined space for the battery module, reduce the direct contact between the battery cells and cold air, so as to improve the performance, safety and service life of the battery pack.

[0005] In order to achieve the above object, the utility model provides an air-cooled battery pack system, comprising:

[0006] A battery module, wherein the battery module is provided with a battery cell;

[0007] Top cover;

[0008] A first shell having a chamber, wherein the battery module is arranged in the chamber, an upper opening is arranged at the top of the first shell, a lower opening is arranged at the bottom of the first shell, and the top cover is fixed to the first shell from one side of the upper opening to close the upper opening of the first shell;

[0009] A thermal pad, the thermal pad is connected to the first shell from one side of the lower opening to close the lower opening of the first shell, and the thermal pad is attached to the bottom of the battery module so that the heat of the battery module can be transferred to the thermal pad;

[0010] A base portion, wherein the base portion is connected to the bottom of the first shell having the thermal pad on one side, and the base portion and the thermal pad together form a heat dissipation duct, wherein an air inlet and an air outlet of the heat dissipation duct are respectively located on opposite sides of the first shell, and are suitable for the input and output of cold air.

[0011] In some embodiments, a plurality of heat dissipation fins are disposed on one side of the thermal pad close to the base portion, and the plurality of heat dissipation fins are evenly distributed on the thermal pad and evenly divide the heat dissipation air duct into a plurality of auxiliary heat dissipation air ducts.

[0012] In some embodiments, each of the battery modules comprises:

[0013] A plurality of battery cells, wherein the plurality of battery cells are arranged in parallel to form an energy unit of the battery module, the number of the lower openings matches the number of the energy units, and the contour of the lower opening matches the bottom contour of the energy unit;

[0014] Two end plates, the two end plates are respectively arranged at two ends of the energy unit, and in the installed state, the two end plates abut against the bottom wall of the chamber;

[0015] The fixing structure is used to provide support for the battery core and the end plate.

[0016] In some embodiments, two positioning ribs are provided on the first shell, and the two positioning ribs are respectively formed by the first shell protruding in a direction away from the bottom supporting portion;

[0017] Each of the end plates is arranged corresponding to the corresponding positioning rib, and the corresponding positioning rib and the end plate are fixedly connected via a fixing member to achieve relative fixation of the battery module and the first shell.

[0018] In some embodiments, a first sealing ring is provided between the first housing and the thermal pad, for sealing a joint between the first housing and the thermal pad;

[0019] In each of the battery modules, the height difference between the bottom of the energy unit and the bottom of any of the end plates is a first preset distance; the height difference between the top of the positioning rib and the bottom of the first shell is a second preset distance, and the first preset distance is equal to the second preset distance plus the thickness of the first sealing ring, so that in the installed state, the bottom of the energy unit fits against the surface of the thermal pad.

[0020] In some embodiments, the air-cooled battery pack system further includes a second shell having a communicating accommodation chamber and an exhaust port, wherein an exhaust unit is disposed in the accommodation chamber, and the exhaust unit is used to guide the gas in the accommodation chamber out of the exhaust port;

[0021] The second shell is connected to the first shell and the base portion at the same time, and the second shell is located on a side of the base portion having the air outlet, so that the accommodating chamber is in communication with the air outlet.

[0022] In some embodiments, the first housing is provided with a maintenance window, which is covered by the second housing in the installed state, and the maintenance window is connected to the inside of the first housing, so as to repair the control circuit inside the first housing by removing the maintenance window;

[0023] A maintenance panel is detachably connected to the maintenance window and is used to close the maintenance window in a non-maintenance state.

[0024] In some embodiments, the top cover includes a top plate and two parallel extending edges, wherein the two extending edges are respectively formed by extending from opposite ends of the top plate in a direction perpendicular to the top plate, so that the top cover forms an inverted U-shaped cross section;

[0025] The extending edge abuts against the side wall of the first shell, and the top plate abuts against the top wall of the first shell.

[0026] In some embodiments, a second sealing ring is disposed between the top plate and the first shell for sealing a joint between the top plate and the first shell.

[0027] In some embodiments, a plurality of battery pack mounting portions are provided on the bottom support portion, and the plurality of battery pack mounting portions are evenly distributed on the side wall of the bottom support portion, which is suitable for installing the air-cooled battery pack system inside an energy storage device or a power generation device.

[0028] Compared with the prior art, the air-cooled battery pack system provided in this application has the following beneficial effects:

[0029] 1. In the present application, the battery module is installed in the chamber, and the top cover is fixed to the first shell from the upper opening side, and the thermal pad is fixed to the first shell from the lower opening side, forming a closed space, which effectively isolates the direct influence of the external environment on the battery module; moreover, the heat of the battery module is transferred to the bottom of the chamber, and the cold air flows through the heat dissipation duct between the thermal pad and the bottom support to dissipate the heat of the battery module. There is no need to pass the cold air into the battery module, which effectively improves the heat exchange efficiency and enhances the sealing of the battery pack, providing a strong guarantee for the long-term stable operation and safety of the battery pack.

[0030] 2. In this application, through the use of thermal pads, the heat on the bottom wall of the battery module can be quickly transferred to the heat dissipation duct and then carried away by the flowing cold air, thereby avoiding the accumulation of heat inside the battery module. At the same time, the design of the lower opening makes the contact between the battery module and the thermal pad more complete, optimizes the heat exchange area, and helps to achieve a more uniform heat dissipation effect.

[0031] 3. In this application, two positioning ribs are designed to provide precise positioning and stable support for the battery module, ensuring the correct position of the battery module during installation, while also providing additional stability for the battery module to prevent displacement due to vibration or impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0034] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present application;

[0035] Figure 3 is a structural schematic diagram of a first housing in one embodiment of the present application;

[0036] Figure 4 is a cross-sectional view of the overall structure of an embodiment of the present application;

[0037] Figure 5 yes Figure 4 A partial enlarged view of the middle A;

[0038] Figure 6 This is a schematic diagram of the structure of a battery module in one embodiment of the present application;

[0039] Figure 7 is a structural schematic diagram of another embodiment of the present application;

[0040] Figure 8 This is a schematic diagram of the structure of the bottom support portion in one embodiment of the present application;

[0041] Fig. 9 It is a schematic diagram of the structure of a thermal pad in one embodiment of the present application.

[0042] Explanation of the accompanying drawings: first shell 1; chamber 10; lower opening 100; positioning rib 101; heat dissipation duct 11; air inlet 110; air outlet 111; maintenance window 12; maintenance panel 13; bottom support 2; top cover 3; top plate 31; extension edge 32; battery module 4; battery cell 41; end plate 42; thermal pad 5; heat dissipation fin 51; first sealing ring 6; second sealing ring 7; second shell 8; accommodating chamber 80; exhaust port 81; fan 82; battery pack mounting portion 9; mounting groove 91; mounting hole 92. DETAILED DESCRIPTION

[0043] 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.

[0044] 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".

[0045] 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.

[0046] 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 it can be indirectly connected 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.

[0047] 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.

[0048] 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.

[0049] The existing air-cooled battery pack system usually adopts an open or semi-open structure. Although these structures are convenient for heat dissipation, they have some limitations. For example, the battery cells in the open structure are directly exposed to the air, which is conducive to heat dissipation, but it is also easily affected by environmental factors, such as dust, moisture and foreign matter intrusion, which not only reduces the protection level of the battery pack, but also may cause safety problems.

[0050] For the above problems, please refer to the attached manual. Figure 1 The air-cooled battery pack system provided in the present application can effectively improve the protection performance of the battery pack, prevent the battery cells 41 in the battery module 4 from being exposed to the air, and ensure the safety and reliability of the battery pack system.

[0051] Reference Manual Attached Figure 1 , Figure 2 and Figure 6 The present application provides an air-cooled battery pack system, comprising a battery module 4, a top cover 3, a first shell 1, and a bottom support 2. The first shell 1 has a chamber 10 and an upper opening connected to the chamber 10. The battery module 4 is installed in the chamber 10, and there are multiple battery cells 41 inside the battery module 4. The heat generated by these battery cells 41 during operation is conducted to the bottom wall of the chamber 10 of the first shell 1 through the bottom of the battery module 4. The top cover 3 is fixed to the first shell 1 from one side of the opening to form a closed space for accommodating the battery module 4; the bottom support 2 is connected to the side of the first shell 1 away from the top cover 3, that is, the top cover 3, the first shell 1, and the bottom support 2 are stacked and fixedly connected to each other.

[0052] Please refer to the instruction manual Figure 4 and Figure 5 A heat dissipation duct 11 is arranged between the base 2 and the first shell 1, and an air inlet 110 and an air outlet 111 are respectively arranged at both ends of the heat dissipation duct 11. Cold air passes through the heat dissipation duct 11, flows through the bottom wall of the chamber 10, exchanges heat with the heat conducted by the battery module 4, and then carries the heat out from the air outlet 111, thereby achieving effective heat dissipation.

[0053] Based on the above, this embodiment improves the sealing performance of the battery pack through the design of a closed space, prevents the intrusion of dust, moisture and foreign matter, and thus improves the safety and reliability of the battery pack. At the same time, the reasonable layout of the heat dissipation duct 11 optimizes the wind path, improves the heat dissipation efficiency, and ensures that the battery module 4 can operate stably under various environmental conditions.

[0054] In addition, in this embodiment, a material with high thermal conductivity can be used as the bottom wall of the chamber 10 to improve the efficiency of heat transfer from the battery module 4 to the heat dissipation duct 11 .

[0055] Furthermore, based on the above content, Figure 3 As shown, the first shell 1 is provided with a lower opening 100, so that the bottom wall of the battery module 4 can be exposed through the lower opening 100, thereby establishing direct contact with the thermal pad 5, optimizing the heat transfer path from the battery module 4 to the thermal pad 5, and enhancing the heat dissipation efficiency of the entire system.

[0056] The thermal pad 5 in the above content is fixed between the first housing 1 and the bottom support 2 to seal the lower opening 100, and the thermal pad 5 is in contact with at least a portion of the bottom wall of the battery module 4. It can be seen that in this embodiment, on the one hand, the thermal pad 5 can seal the lower opening 100 to prevent external environmental factors from invading the interior of the battery pack; on the other hand, the thermal pad 5 is directly in contact with at least a portion of the bottom wall of the battery module 4, thereby laying a foundation for efficient heat exchange.

[0057] It should also be noted that the material selection of the thermal pad 5 is crucial. It needs to have excellent thermal conductivity while maintaining sufficient mechanical strength and durability. Commonly used materials for the thermal pad 5 include but are not limited to metal substrates (such as copper, aluminum), engineering plastics, or composite materials with special fillers. The design of the thermal pad 5 also takes into account the contact area and pressure between it and the bottom wall of the battery module 4 to ensure good thermal contact under various working conditions.

[0058] In this embodiment, the thermal pad 5 can be fixed in place by various mechanical fastening methods (such as screws, buckles or adhesives) to ensure that the thermal pad 5 is in contact with the bottom wall of the battery module 4. At the same time, this fixing method can also be a detachable connection, so that the operator can easily replace the thermal pad 5 when necessary, so as to facilitate the maintenance and repair of the battery pack.

[0059] In addition, in some embodiments, Fig. 9 As shown, a plurality of heat dissipation fins 51 or similar structures can be provided on the surface of one side of the thermal pad 5 close to the base portion 2 to expand the contact area between the cold air and the thermal pad 5, thereby improving the overall heat exchange efficiency and heat dissipation efficiency.

[0060] In one embodiment, based on the above embodiment, each battery module 4 is composed of multiple battery cells 41, which are arranged in parallel to form an energy unit of the battery module 4, and the contour of the lower opening 100 in the above embodiment matches the contour of the bottom of the energy unit, ensuring good contact between the bottom of the battery cell 41 and the thermal pad 5, thereby improving the heat dissipation efficiency. At this time, the number of lower openings 100 can also be specifically set according to the number of battery modules 4.

[0061] like Figure 6As shown, two end plates 42 are respectively provided at both ends of the battery module 4. In addition, the end plates 42 abut against the bottom wall of the chamber 10 in the installed state, providing necessary mechanical support for the battery cell 41 and also helping to stably position the battery module 4 in the chamber 10. In addition, the presence of the end plates 42 also helps to protect the end connection of the battery cell 41 and reduce the risk of damage to the battery cell 41 caused by external impact or vibration.

[0062] Furthermore, the accompanying drawings show that the air-cooled battery pack system of this embodiment includes two battery modules 4, and the two battery modules 4 are arranged side by side in the first shell 1, which optimizes space utilization and improves the compactness of the structure. Moreover, the battery modules 4 arranged side by side allow the two battery modules 4 to share the same heat dissipation duct 11, effectively improving the heat dissipation efficiency. The same applies if there are more battery modules 4.

[0063] At the same time, the end plates 42 of the two battery modules 4 that are in corresponding positions are also located in the same vertical plane, which helps to simplify the installation and fixing process of the battery modules 4 and also facilitates the electrical connection between the battery modules 4 .

[0064] In order to further improve the structural stability of the battery module 4, the battery module 4 also includes a fixing structure, which provides a stable support for the battery cell 41 and the end plate 42. The fixing structure can be in various forms, such as a fixing frame, a bracket or other mechanical fixing devices, to ensure the overall stability of the battery module 4 in the battery pack and facilitate the installation and maintenance of the battery module 4.

[0065] In another embodiment, if Figure 3 and Figure 5 As shown, two positioning ribs 101 are provided on the first shell 1 , and the two positioning ribs 101 are respectively formed by the first shell 1 protruding in a direction away from the base portion 2 .

[0066] Each end plate 42 is arranged corresponding to the corresponding positioning rib 101, and the corresponding positioning rib 101 and the end plate 42 are fixedly connected by a fixing part to achieve relative fixation of the battery module 4 and the first shell 1, ensuring the correct alignment of the battery module 4 during installation, and also simplifying the installation process of the battery module 4, which can save the assembly time of the air-cooled battery pack system.

[0067] By using the positioning rib 101 and the fixing member together, the battery module 4 is firmly fixed in the first housing 1 and forms good contact with the bottom wall of the chamber 10. The air-cooled battery pack system in the present application not only optimizes the heat dissipation path of the battery module 4, but also improves the overall structural stability of the battery pack. The stable positioning of the battery module 4 also helps to reduce the relative movement between internal components, reduce wear, and extend the service life of the battery pack.

[0068] It should also be noted that the positioning rib 101 can be integrally formed with the first shell 1, and of course can also be installed on the first shell 1 through subsequent assembly. The main highlight of this embodiment is that by setting the positioning rib 101 on the bottom wall of the chamber 10, and cooperating with the end plate 42 and the fixing parts, the battery module 4 is accurately positioned and firmly fixed.

[0069] Please refer to the instruction manual Figure 2 and Figure 5 On the basis of the above embodiment, while ensuring effective heat transfer between the battery module 4 and the thermal pad 5, the sealing and stability of the first shell 1 should also be ensured. To this end, a first sealing ring 6 is provided between the first shell 1 and the thermal pad 5 to seal the joint between the two to prevent external environmental factors such as dust and moisture from intruding, and also to avoid ineffective loss of internal heat.

[0070] The height difference between the bottom of the energy unit (battery cell 41) and the bottom of any end plate 42 is a first preset distance, and the height difference between the top of the positioning rib 101 and the bottom of the first shell 1 is a second preset distance. The first preset distance is equal to the second preset distance plus the thickness of the first sealing ring 6, ensuring that when the battery module 4 is installed, the bottom of the energy unit can be precisely fitted with the surface of the thermal pad 5, maximizing the heat exchange efficiency while keeping the structure neat and compact.

[0071] In one embodiment, based on the above embodiment, Figure 2 As shown, in order to ensure that the joint between the top cover 3 and the first shell 1 has good sealing performance and prevent external environmental factors such as dust and moisture from invading the interior of the battery pack, a second sealing ring 7 is provided between the top cover 3 and the first shell 1 to seal the joint between the two, thereby forming a closed space, which helps to protect the internal control circuit and battery module 4 from damage. In addition, good sealing performance also helps to maintain the temperature inside the battery pack stable and reduce internal temperature abnormalities caused by external temperature fluctuations.

[0072] It should be noted that the materials of the second sealing ring 7 in this embodiment and the first sealing ring 6 in the above embodiment should be specifically selected according to the use scenario of the air-cooled battery pack system to ensure good elasticity and sealing performance under various environmental conditions. It can be made of chemically resistant, temperature resistant and aging resistant materials, such as rubber, silicone rubber or other synthetic materials, to adapt to the different temperatures and chemical environments that the battery pack may encounter.

[0073] In one embodiment, Figure 4 and Figure 7As shown, the air-cooled battery pack system includes a second shell 8, which has a communicating accommodation chamber 80 and an exhaust port 81. An exhaust unit is provided in the accommodation chamber 80, and the exhaust unit is used to discharge the gas in the accommodation chamber 80.

[0074] Among them, the second shell 8 is connected to the first shell 1 and the base 2 at the same time. The second shell 8 is located on the side of the base 2 having the air outlet 111, so that the accommodating chamber 80 is connected to the air outlet 111, thereby forming an effective gas outlet path, which can effectively maintain the dynamic balance of the airflow inside the battery pack, and also promote the heat exchange process between the cold air in the heat dissipation duct 11 and the bottom wall of the chamber 10 / the thermal pad 5.

[0075] Through the exhaust unit set on the second shell 8, the heat generated by the operation of the battery cells 41 inside the battery pack can be effectively discharged through gas flow, avoiding heat accumulation, thereby improving the heat dissipation efficiency of the entire battery pack, extending the service life of the battery, and improving the safety of the battery pack.

[0076] Specifically, the exhaust unit is a fan 82, and the number of fans 82 can be set to two as shown in the figure, or it can be adjusted according to the needs and design requirements of the system. Taking the situation in the attached figure as an example, the use of two fans 82 can provide higher exhaust efficiency and ensure that the heat generated during the operation of the battery pack can be quickly discharged. Secondly, the dual fan 82 configuration can also achieve redundant design, that is, when one fan 82 fails, the other fan 82 can continue to work, thereby improving the reliability and safety of the system.

[0077] Based on this embodiment (not shown in the drawings), the operation of the fan 82 can be intelligently controlled by the battery management system (BMS) in the air-cooled battery pack system. The BMS can adjust the operating speed of the fan 82 according to the temperature sensor data set inside the battery pack to achieve more accurate and energy-saving temperature control. The exhaust effect of the fan 82 can also work in conjunction with the heat dissipation duct 11 and the thermal pad 5 to optimize the thermal management of the entire battery pack.

[0078] In one embodiment, Figure 3 As shown, the first shell 1 is provided with a maintenance window 12, which is connected to the interior of the first shell 1, so that maintenance personnel can easily check, maintain or replace the control circuit inside the battery pack through the maintenance window 12, thereby improving the maintainability and maintenance efficiency of the battery pack.

[0079] In normal operation, the maintenance window 12 is covered by the second housing 8, which can protect the control circuit from environmental factors and maintain the sealing and overall appearance of the battery pack. When the control circuit needs to be repaired or inspected, the maintenance window 12 can be exposed by removing the second housing 8, so as to conveniently access the internal control circuit.

[0080] For further information, please refer to the attached manual. Figure 2 In order to close the maintenance window 12 when not in maintenance mode, a detachably connected maintenance panel 13 is designed on the maintenance window 12. The connection between the maintenance panel 13 and the maintenance window 12 can adopt a detachable structure, such as a threaded connection or a snap connection, so that maintenance personnel can quickly remove or install the maintenance panel 13, thereby simplifying the maintenance process and ensuring the sealing and protection level of the battery pack when not in maintenance mode.

[0081] In another embodiment, based on the above embodiment, the top cover 3 includes a top plate 31 and two parallel extended edges 32, and the two extended edges 32 are respectively formed by extending from opposite ends of the top plate 31 in a direction perpendicular to the top plate 31, so that the top cover 3 forms an inverted U-shaped cross-section.

[0082] When the top cover 3 is fixed to the first shell 1, the extended edge 32 abuts against the side wall of the first shell 1, providing good lateral support for the battery pack. The top plate 31 abuts against the top wall of the first shell 1, closing the opening at the top of the first shell 1, forming an enclosed space, which is beneficial to the thermal management and control inside the battery pack.

[0083] Moreover, during the installation process, the inverted U-shaped design of the top cover 3 simplifies the alignment steps. Since the extended edge 32 is in vertical contact with the side wall of the first housing 1, the top cover 3 can be quickly positioned to the correct installation position without the need for complicated adjustment or alignment processes, which can reduce the installation time, improve the assembly efficiency, and also reduce the potential errors caused by improper installation.

[0084] In one embodiment, different from the above-mentioned embodiment, a plurality of battery pack mounting portions 9 are provided on the bottom support portion 2, and the plurality of battery pack mounting portions 9 are evenly distributed on the side wall of the bottom support portion 2, which is suitable for installing the air-cooled battery pack system into the energy storage device or the power generation device.

[0085] In this embodiment, if Figure 8 As shown, four battery pack mounting portions 9 are provided on the base portion 2, and are evenly distributed in groups of two on opposite sides of the base portion 2. Through these battery pack mounting portions 9, the air-cooled battery pack system can be conveniently fixed at a desired position, thereby simplifying the installation process. In addition, the evenly distributed layout helps the battery pack system to maintain balance during installation, thereby avoiding structural stress or performance degradation due to improper installation.

[0086] Specifically, each battery pack mounting portion 9 has a mounting groove 91 and at least one mounting hole 92. The mounting groove 91 is an opening portion on the bottom bracket portion 2, which is used to cooperate with the corresponding protrusion on the energy storage or power generation equipment. The mounting holes 92 are evenly distributed on the adjacent sides of the mounting groove 91 (vertical to the opening direction of the mounting groove 91) and are used to guide connectors (not shown in the figure), such as bolts or screws, to fix the battery pack. During the installation process, the connector can be easily inserted into the mounting groove 91 and bolted through the mounting hole 92, so that the battery pack is firmly fixed to the energy storage device or power generation device.

[0087] At the same time, when the battery pack needs to be maintained or replaced, the battery pack can be quickly removed from the energy storage device or power generation equipment by removing the connector, which reduces maintenance time, reduces maintenance costs, and improves the practicality and compatibility of the equipment.

[0088] 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. An air-cooled battery pack system, characterized in that: include: A battery module, wherein the battery module is provided with a battery cell; Top cover; A first shell having a chamber, wherein the battery module is arranged in the chamber, an upper opening is arranged at the top of the first shell, a lower opening is arranged at the bottom of the first shell, and the top cover is fixed to the first shell from one side of the upper opening to close the upper opening of the first shell; A thermal pad, the thermal pad is connected to the first shell from one side of the lower opening to close the lower opening of the first shell, and the thermal pad is attached to the bottom of the battery module so that the heat of the battery module can be transferred to the thermal pad; A base portion, wherein the base portion is connected to the bottom of the first shell having the thermal pad on one side, and the base portion and the thermal pad together form a heat dissipation duct, wherein an air inlet and an air outlet of the heat dissipation duct are respectively located on opposite sides of the first shell, and are suitable for the input and output of cold air.

2. The air-cooled battery pack system according to claim 1, characterized in that: A plurality of heat dissipation fins are arranged on one side of the thermal pad close to the bottom support portion. The plurality of heat dissipation fins are evenly distributed on the thermal pad and evenly divide the heat dissipation air duct into a plurality of auxiliary heat dissipation air ducts.

3. The air-cooled battery pack system according to claim 1, characterized in that: Each of the battery modules comprises: A plurality of battery cells, wherein the plurality of battery cells are arranged in parallel to form an energy unit of the battery module, the number of the lower openings matches the number of the energy units, and the contour of the lower opening matches the bottom contour of the energy unit; Two end plates, the two end plates are respectively arranged at two ends of the energy unit, and in the installed state, the two end plates abut against the bottom wall of the chamber; The fixing structure is used to provide support for the battery core and the end plate.

4. The air-cooled battery pack system according to claim 3, characterized in that: Two positioning ribs are provided on the first shell, and the two positioning ribs are respectively formed by the first shell protruding in a direction away from the bottom supporting part; Each of the end plates is arranged corresponding to the corresponding positioning rib, and the corresponding positioning rib and the end plate are fixedly connected via a fixing member to achieve relative fixation of the battery module and the first shell.

5. The air-cooled battery pack system according to claim 4, characterized in that: A first sealing ring is provided between the first housing and the thermal pad, for sealing a joint between the first housing and the thermal pad; In each of the battery modules, the height difference between the bottom of the energy unit and the bottom of any of the end plates is a first preset distance; The height difference between the top of the positioning rib and the bottom of the first shell is a second preset distance, and the first preset distance is equal to the second preset distance plus the thickness of the first sealing ring, so that in the installed state, the bottom of the energy unit fits against the surface of the thermal pad.

6. The air-cooled battery pack system according to any one of claims 1 to 5, characterized in that: Also includes: A second shell has a communicating accommodation chamber and an exhaust port, wherein an exhaust unit is disposed in the accommodation chamber and is used to discharge the gas in the accommodation chamber from the exhaust port; The second shell is connected to the first shell and the base portion at the same time, and the second shell is located on a side of the base portion having the air outlet, so that the accommodating chamber is in communication with the air outlet.

7. The air-cooled battery pack system according to claim 6, characterized in that: The first shell is provided with a maintenance window, which is covered by the second shell in the installed state, and the maintenance window is connected to the inside of the first shell, so as to repair the control circuit inside the first shell by removing the maintenance window; A maintenance panel is detachably connected to the maintenance window and is used to close the maintenance window in a non-maintenance state.

8. The air-cooled battery pack system according to any one of claims 1 to 5 and 7, characterized in that: The top cover comprises a top plate and two parallel extending edges, wherein the two extending edges are respectively formed by extending from opposite ends of the top plate in a direction perpendicular to the top plate, so that the top cover forms an inverted U-shaped cross section; The extending edge abuts against the side wall of the first shell, and the top plate abuts against the top wall of the first shell.

9. The air-cooled battery pack system according to claim 8, characterized in that: A second sealing ring is provided between the top plate and the first shell, for sealing a joint between the top plate and the first shell.

10. The air-cooled battery pack system according to any one of claims 1-5, 7 and 9, characterized in that: A plurality of battery pack mounting portions are arranged on the bottom support portion, and the plurality of battery pack mounting portions are evenly distributed on the side wall of the bottom support portion, which is suitable for installing the air-cooled battery pack system inside an energy storage device or a power generation device.

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