Air-cooled battery pack

Abstract

The utility model discloses an air-cooled battery pack which comprises at least two battery modules which are arranged at intervals; the battery module is fixed on the battery box body; the plastic upper cover is detachably connected with the battery box body, the plastic upper cover is arranged on the battery module in a covering manner, and a heat dissipation air channel is formed among the plastic upper cover, the battery box body and the battery module. According to the technical scheme, the upper cover of the battery pack is made of plastics instead of metal plates, so that the weight of the upper cover of the battery pack is reduced, and the assembly is convenient. In addition, the material of the plastic upper cover is insulated, so that an insulating layer does not need to be additionally arranged between the upper cover and the battery cell aluminum row, parts can be reduced, and material cost is saved. The plastic upper cover covers the battery module, and a heat dissipation air channel is formed among the plastic upper cover, the battery box body and the battery module, so that the heat dissipation effect of the air-cooled battery pack can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to an air-cooled battery pack. Background Art

[0002] Existing battery packs typically consist of a battery module, cooling system, and other components. Multiple battery cells are assembled through a complex mounting structure to form a battery module, and multiple battery modules are then assembled through a complex assembly structure to form a battery pack. At this stage, the battery cells are still exposed and require a sheet metal enclosure and cover to protect them.

[0003] Due to the material properties of sheet metal parts, the sheet metal cover is heavy. When the sheet metal cover is large in size, more than two people are required to carry and assemble it, which increases the production cost. Utility Model Content

[0004] The main purpose of this utility model is to propose an air-cooled battery pack, Topic 2 and Topic 3, aiming to reduce the production cost of the battery pack.

[0005] To achieve the above objectives, the air-cooled battery pack proposed in the present invention includes:

[0006] At least two battery modules, wherein the battery modules are spaced apart from each other;

[0007] A battery box, wherein the battery module is fixed to the battery box;

[0008] A plastic upper cover is detachably connected to the battery box body, and the plastic upper cover is arranged on the battery module. A heat dissipation duct is formed between the plastic upper cover, the battery box body and the battery module.

[0009] In one embodiment, the air-cooled battery pack further includes:

[0010] A CCS bracket, the CCS bracket being mounted on top of at least two of the battery modules, disposed between the plastic upper cover and the battery module, and electrically connected to the two battery modules;

[0011] The plastic upper cover is detachably connected to the CCS bracket.

[0012] In one embodiment, the CCS bracket is provided with a first mounting hole, and the plastic cover is provided with a second mounting hole in an area corresponding to the first mounting hole;

[0013] The plastic upper cover is detachably connected to the CCS bracket by fasteners passing through the second mounting hole and the first mounting hole.

[0014] In one embodiment, the CCS bracket is formed with a first limiting portion corresponding to the first mounting hole;

[0015] The plastic upper cover is provided with a second limiting portion at a position corresponding to the second mounting hole, and the plastic upper cover is limited by the first limiting portion and the second limiting portion respectively with the CCS bracket.

[0016] In one embodiment, the second limiting portion is a U-shaped groove, and the second mounting hole is provided on the bottom wall of the U-shaped groove.

[0017] In one embodiment, the plastic upper cover is further provided with at least one set of reinforcing ribs.

[0018] In one embodiment, the box includes end plates and a base that are vertically connected;

[0019] The two battery modules are a first battery module and a second battery module, the first battery module and the second battery module are spaced apart and arranged on both sides of the base, and a heat dissipation duct is formed between the first battery module and the second battery module;

[0020] A first convex portion is formed in the middle of the side of the plastic upper cover facing the CCS bracket. The first convex portion is at least partially located in the gas flow channel and blocks the upper layer of the gas flow channel.

[0021] In one embodiment, a heat dissipation component is provided on the end plate, and the heat dissipation component is correspondingly arranged and communicated with the lower layer of the gas flow channel;

[0022] Wind-shielding foam is provided on both sides of the heat dissipation component, and the wind-shielding foam is used to seal the gap between the battery module and the heat dissipation component.

[0023] In one embodiment, a wind shield is included, one side of which is connected to an end of the first battery module away from the end plate, and the other side of which is connected to an end of the second battery module away from the end plate to block the gas flow channel.

[0024] In one embodiment, a connecting piece is included, a third mounting portion is provided on the top end of the end plate, and the plastic upper cover is connected to the third mounting portion via the connecting piece.

[0025] This utility model's technical solution reduces the weight of the battery pack cover by replacing sheet metal with plastic, facilitating assembly. Furthermore, the inherently insulating plastic cover eliminates the need for an additional insulating layer between the cover and the aluminum battery cells, reducing component count and material costs. The plastic cover is positioned over the battery module, and cooling ducts are formed between the plastic cover, the battery case, and the battery module, further enhancing the heat dissipation of the air-cooled battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a structural diagram of an embodiment of an air-cooled battery pack provided by the present invention;

[0028] Figure 2 An exploded view of an embodiment of an air-cooled battery pack provided by the present invention;

[0029] Figure 3 This is a structural schematic diagram of the air-cooled battery pack provided by the present invention with the plastic upper cover removed;

[0030] Figure 4 A schematic structural diagram of the battery box provided by the utility model;

[0031] Figure 5 A schematic diagram of the structure of the plastic upper cover provided by the utility model;

[0032] Figure 6 This is a structural schematic diagram of the plastic upper cover provided by the utility model from another perspective.

[0033] Description of Figure Numbers:

[0034] 1. Battery case; 11. End plate; 111. Third mounting portion; 12. Base; 2. Battery module; 21. First battery module; 22. Second battery module; 3. CCS bracket; 31. First limiting portion; 32. First mounting hole; 4. Plastic top cover; 41. Second limiting portion; 42. Second mounting hole; 43. Reinforcing rib; 44. First protrusion; 5. Gas flow channel; 6. Heat dissipation assembly; 7. Windshield foam; 8. Windshield member.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The utility model provides an air-cooled battery pack.

[0040] See also Figure 1 and Figure 2 In one embodiment of the present invention, the air-cooled battery comprises: at least two battery modules 2, a battery box 1 and a plastic cover 4. The two battery modules 2 are fixed in the battery box 1.

[0041] In this embodiment, the battery module 2 is composed of multiple battery cells. These cells are assembled with a complex fixing structure to form the battery module 2. A heat sink is positioned between two adjacent cells, and multiple ventilation holes are provided in the center of the heat sink for ventilation. During use, heat is transferred from the opposing sides of two adjacent cells to the heat sink, which then dissipates the heat to the outside world through the ventilation holes, achieving effective heat dissipation.

[0042] In this embodiment, the two battery modules 2 are spaced apart to form a gap for air circulation between the two battery modules 2. The gap can further dissipate heat and avoid heat accumulation in the battery pack caused by the two battery modules 2 being close to each other.

[0043] The plastic upper cover 4 is detachably connected to the battery box 1 , and the plastic upper cover 4 is arranged on the battery module 2 to cover the gap between the two battery modules 2 for air circulation. A heat dissipation duct is formed between the plastic upper cover 4 , the battery box 1 and the battery module 2 .

[0044] See also Figure 1 and Figure 2 In one embodiment, the air-cooled battery pack further includes a CCS bracket 3, on which a CCS assembly is provided. The CCS bracket 3, or integrated busbar bracket (Cells Contact System), is an important structural component for fixing and supporting the CCS assembly. The CCS assembly (CCS, Cells Contact System), or integrated busbar, is primarily composed of signal acquisition components (FPC, PCB, FFC, etc.), plastic structural components, copper and aluminum busbars, etc., which are connected into a whole through processes such as thermal pressing or riveting to achieve high-voltage series and parallel connection of battery cells, as well as battery temperature sampling and battery cell voltage sampling functions. It provides temperature and voltage to the BMS system through the FPC / PCB and connector assembly, and is part of the BMS system.

[0045] CCS assemblies offer several advantages over traditional wiring harnesses, including excellent sealing and weather resistance due to the integrated hot-pressed molding process, compact size, thinness, and high integration. These features enable CCS assemblies to improve the overall performance of battery modules, including energy density, power output, and cycle life, while also reducing battery costs and improving safety.

[0046] CCS components are widely used in battery packs and energy storage systems for new energy vehicles. In energy storage systems, the CCS integrated busbar, also known as the energy storage battery cover assembly, is used to cover new energy vehicles and energy storage battery modules. It provides battery temperature and cell voltage sampling functions and enables high-voltage series and parallel connection of cells. The primary function of the energy storage CCS is to aggregate the energy output of energy storage devices onto an integrated busbar for efficient management and distribution.

[0047] The CCS bracket 3 is mounted on top of at least two of the battery modules 2, disposed between the plastic upper cover 4 and the battery modules 2, and electrically connected to the two battery modules 2. In this way, the CCS bracket 3 ensures that the CCS assembly can be stably mounted on top of the battery modules 2 and can maintain good performance in harsh environments.

[0048] See also Figures 2 to 3 In one embodiment, to facilitate installation of the plastic cover 4, the CCS bracket 3 is provided with a first mounting hole 32, and the plastic cover 4 is provided with a second mounting hole 42 in an area corresponding to the first mounting hole 32. The plastic cover 4 is detachably connected to the CCS bracket 3 by fasteners passing through the second mounting hole 42 and the first mounting hole 32. Specifically, the fasteners may be expansion bolts.

[0049] See also Figures 2 to 3 Furthermore, to facilitate alignment and installation, in one embodiment, the CCS bracket 3 is provided with a first limiting portion 31 corresponding to the first mounting hole 32. The plastic cover 4 is provided with a second limiting portion 41 at a position corresponding to the second mounting hole 42. The plastic cover 4 is respectively limited in position by the first limiting portion 31 and the second limiting portion 41 relative to the CCS bracket 3.

[0050] In this embodiment, the CCS bracket 3 is designed with a first limiting portion 31, which corresponds to the first mounting hole 32 on the device and is used to limit the position to ensure that the plastic cover 4 can be accurately installed. The plastic cover 4 is provided with a second limiting portion 41 at a location that matches the second mounting hole 42. This is also for the purpose of cooperating with the first limiting portion 31 of the CCS bracket 3 during the installation process to achieve precise alignment. Through the cooperation of the first limiting portion 31 and the second limiting portion 41, the plastic cover 4 can be stably connected to the CCS bracket 3 to prevent displacement or misalignment during the installation process. This ensures that the installation between the plastic cover 4 and the CCS bracket 3 is not only stable but also highly precise, avoiding potential problems caused by inaccurate alignment.

[0051] See also Figures 1 to 3 Furthermore, in order to facilitate alignment and installation, in one embodiment, the second limiting portion 41 is a U-shaped groove, and the second mounting hole 42 is provided on the bottom wall of the U-shaped groove. The purpose of setting the second limiting portion 41 as a U-shaped groove is to optimize the operating experience of the expansion bolt, ensure stability and simplicity during installation and disassembly, and reduce the discomfort of the fingers during operation. The specific shape of the U-shaped groove can naturally guide the fingers to correctly position themselves on the expansion bolt, thereby simplifying the alignment process and improving operational accuracy. At the same time, when pressing the expansion bolt with your fingers, the expansion bolt can be pressed directly to the bottom without being hindered by the edge of the second limiting portion 41, which may cause inconvenience in installation or injury to the fingers.

[0052] See also Figures 1 to 6In one embodiment, the plastic cover 4 is further provided with at least one set of reinforcing ribs 43. In this embodiment, the purpose of adding at least one set of reinforcing ribs 43 to the plastic cover 4 is to enhance its structural strength and stability, ensuring that it can maintain good performance under various environmental conditions. The design of the reinforcing ribs 43 can effectively increase the mechanical strength of the plastic cover 4, especially when subjected to external forces or loads, and can reduce the risk of deformation and damage. By adding the reinforcing ribs 43, the material fluidity and filling efficiency can be improved, making the molding process of the plastic cover 4 easier to control and the quality of the finished product better. At the same time, the reinforcing ribs 43 can help to enhance the strength of the local area without increasing the overall thickness of the plastic cover 4, which helps to reduce the problem of uneven wall thickness. While meeting the same strength requirements, reasonably designed reinforcing ribs 43 can reduce the amount of material used, thereby achieving cost savings in production.

[0053] See also Figures 1 to 4 In one embodiment, the housing includes a vertically connected end plate 11 and a base 12. The two battery modules 2 are respectively a first battery module 212 and a second battery module 222. The first battery module 212 and the second battery module 222 are spaced apart on either side of the base 12, forming a heat dissipation duct between the first battery module 212 and the second battery module 222. A first protrusion 44 is formed in the middle of the side of the plastic cover 4 facing the CCS bracket 3. The first protrusion 44 is at least partially located in the gas flow channel 5 and blocks the upper layer of the gas flow channel 5.

[0054] In this embodiment, the vertically connected end plates 11 and base 12 effectively support and secure the battery modules 2, while also facilitating heat dissipation. The first and second battery modules 212 and 222 are spaced apart on either side of the base 12. This arrangement helps form a heat dissipation duct, promoting air circulation and improving heat dissipation efficiency.

[0055] The first protrusion 44 formed in the middle of one side of the plastic cover 4 facing the CCS bracket 3 not only serves as a limit, but also blocks the upper layer of the gas flow channel 5. This design helps guide the gas flow to a predetermined path and enhances the heat dissipation effect.

[0056] The opposing sides of two adjacent battery cells transfer heat to the heat sink, which then transfers the heat to the heat dissipation duct through the ventilation holes. The heat is then dissipated to the outside world through the ventilation duct, achieving effective heat dissipation. The ventilation holes on the heat sink allow heat to be dissipated by convection. This fully utilizes the thermal conductivity of the heat sink and the ventilation function of the ventilation holes, achieving effective heat exchange between battery cells and between the battery cells and the external environment.

[0057] In order to improve the heat dissipation capacity of the battery pack and realize active heat dissipation, in one embodiment, a heat dissipation component 6 is provided on the end plate 11, and the heat dissipation component 6 is correspondingly arranged and connected to the lower layer of the gas flow channel 5. Specifically, the heat dissipation component 6 is a heat dissipation fan. The function of the heat dissipation fan is to suck gas and accelerate the air flow inside the gas flow channel 5, which not only promotes convection heat dissipation, but also enhances the heat exchange rate, significantly improving the efficiency of the entire heat dissipation system. After the heat dissipation fan is started, hot air will be extracted from the lower layer of the heat dissipation duct to accelerate the flow rate of air. In this way, the hot air can be discharged from the heat dissipation duct between the battery modules 2 more quickly, replacing the slow process of natural heat dissipation. Through this active heat dissipation mechanism, the system can quickly respond to the heat generation of the battery operation and ensure that the battery pack operates within the ideal temperature range. This design is crucial to extending battery life and improving performance stability, especially in high-load and high-temperature environments.

[0058] Windshield foam 7 is provided on both sides of the heat dissipation component 6, and the windshield foam 7 is used to seal the gap between the battery module 2 and the heat dissipation component 6. As an additional design on both sides of the heat dissipation component 6, the windshield foam 7 plays a dual role of sealing and guiding. The windshield foam 7 fills the gap between the battery module 2 and the heat dissipation component 6 to ensure the integrity and effectiveness of the heat dissipation duct. The provision of the windshield foam 7 not only prevents the escape of airflow, but also cooperates with the work of the heat dissipation fan to guide the airflow along a predetermined path. This ensures that the air flow in the heat dissipation duct is more orderly and improves the heat dissipation efficiency.

[0059] In one embodiment, a wind shield is included, one side of which is connected to an end of the first battery module 212 away from the end plate 11, and the other side of the wind shield is connected to an end of the second battery module 222 away from the end plate 11 to block the gas flow channel 5.

[0060] In this embodiment, the windshield is provided at the rear of the gas flow channel 5, forming a closed environment to prevent leakage of airflow in the gas flow channel 5 and ensure directional flow of airflow. The provision of the windshield effectively blocks the gas flow channel 5, preventing disorderly escape of airflow, ensuring that the airflow flows within the predetermined path, and improving heat dissipation efficiency.

[0061] In one embodiment, a connecting piece is included, and a third mounting portion 111 is provided on the top of the end plate 11 , and the plastic upper cover 4 is connected to the third mounting portion 111 via the connecting piece.

[0062] This new solution reduces the weight of the battery cover by replacing sheet metal with plastic, facilitating assembly. Furthermore, the plastic cover itself is insulated, eliminating the need for an additional insulating layer between the cover and the aluminum cores, reducing component count and material costs.

[0063] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air-cooled battery pack, characterized in that: include: At least two battery modules, wherein the battery modules are spaced apart from each other; A battery box, wherein the battery module is fixed to the battery box; A plastic upper cover is detachably connected to the battery box body, and the plastic upper cover is arranged on the battery module. A heat dissipation duct is formed between the plastic upper cover, the battery box body and the battery module.

2. The air-cooled battery pack according to claim 1, wherein: The air-cooled battery pack further includes: A CCS bracket, the CCS bracket being mounted on top of at least two of the battery modules, disposed between the plastic upper cover and the battery module, and electrically connected to the two battery modules; The plastic upper cover is detachably connected to the CCS bracket.

3. The air-cooled battery pack according to claim 2, wherein: The CCS bracket is provided with a first mounting hole, and the plastic cover is provided with a second mounting hole in an area corresponding to the first mounting hole; The plastic upper cover is detachably connected to the CCS bracket by fasteners passing through the second mounting hole and the first mounting hole.

4. The air-cooled battery pack according to claim 3, wherein: The CCS bracket is formed with a first limiting portion corresponding to the first mounting hole; The plastic upper cover is provided with a second limiting portion at a position corresponding to the second mounting hole, and the plastic upper cover is limited by the first limiting portion and the second limiting portion respectively with the CCS bracket.

5. The air-cooled battery pack according to claim 4, wherein: The second limiting portion is a U-shaped groove, and the second mounting hole is arranged on the bottom wall of the U-shaped groove.

6. The air-cooled battery pack according to claim 1, wherein: The plastic upper cover is further provided with at least one set of reinforcing ribs.

7. The air-cooled battery pack according to claim 2, wherein: The box body includes end plates and a base that are vertically connected; The two battery modules are a first battery module and a second battery module, the first battery module and the second battery module are spaced apart and arranged on both sides of the base, and a heat dissipation duct is formed between the first battery module and the second battery module; A first convex portion is formed in the middle of the side of the plastic upper cover facing the CCS bracket. The first convex portion is at least partially located in the gas flow channel and blocks the upper layer of the gas flow channel.

8. The air-cooled battery pack according to claim 7, wherein: The end plate is provided with a heat dissipation component, which is correspondingly arranged and communicated with the lower layer of the gas flow channel; Wind-shielding foam is provided on both sides of the heat dissipation component, and the wind-shielding foam is used to seal the gap between the battery module and the heat dissipation component.

9. The air-cooled battery pack according to claim 8, wherein: A windshield is included, one side of which is connected to an end of the first battery module away from the end plate, and the other side of which is connected to an end of the second battery module away from the end plate to block the gas flow channel.

10. The air-cooled battery pack according to claim 7, wherein: It comprises a connecting piece, a third mounting portion is provided on the top of the end plate, and the plastic upper cover is connected to the third mounting portion through the connecting piece.

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