Battery pack device

Abstract

The utility model relates to a battery pack device, relates to battery heat dissipation technical field, the battery pack device of the utility model discloses a battery pack device, including shell, battery pack and cooling module, the interior cavity of shell is cooling medium coverage area, the interior cavity of shell is filled with cooling medium, the battery pack is arranged in the shell, and the cooling module is arranged in the shell. Comprising a plurality of battery modules arranged at intervals; the cooling module comprises a plurality of groups of first cooling pipes and a plurality of groups of second cooling pipes which are arranged at intervals, the first cooling pipes are arranged below the battery modules, and the second cooling pipes are arranged in gaps among the battery modules and on the outer side surfaces of the edge battery modules and are communicated with the first cooling pipes. Heat in a cooling medium is taken away through circulating cooling liquid in the first cooling pipe and the second cooling pipe, the cooling medium does not participate in circulating flow outside the battery pack, the design of a flow channel in the battery pack does not need to be considered, the design difficulty is greatly reduced, the transverse and longitudinal temperature difference of the battery module is reduced, and effective cooling of the battery module is realized.

Description

Technical Field

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

[0002] In recent years, the energy storage industry has developed rapidly, with fast technological iteration and a growing trend towards higher energy density energy storage units. However, with advancements in battery technology, especially the continuous increase in the energy density of individual cells, the heat generated during cell operation becomes increasingly difficult to dissipate. Heat accumulation leads to increased internal temperature and uneven temperature distribution, affecting the temperature consistency of individual battery cells and negatively impacting battery health and lifespan. In severe cases, it can even cause thermal runaway, affecting the safety and reliability of the entire storage system. Therefore, the development of the energy storage industry inevitably places higher demands on heat dissipation.

[0003] Traditionally, energy storage battery packs mainly use forced air cooling and liquid plate cooling to dissipate heat. However, in high energy density applications, these methods have certain limitations in terms of maximum temperature control and temperature difference control, making it difficult to effectively control the temperature inside the battery pack and even causing safety issues. Utility Model Content

[0004] This invention provides a battery pack device to solve the technical problem of poor control of maximum temperature and temperature difference in existing cooling systems.

[0005] This utility model provides a battery pack device, including:

[0006] The housing has an internal cavity that is a cooling medium-covered area, and the internal cavity is filled with cooling medium.

[0007] A battery pack, wherein the battery pack is disposed within the housing, and the battery pack includes a plurality of battery modules arranged at intervals.

[0008] The cooling module includes a first cooling pipe and a second cooling pipe. There are multiple sets of the first cooling pipe, and each battery module has a set of the first cooling pipe below it. There are multiple sets of the second cooling pipe, which are spaced apart. Each side of the battery module parallel to surface A is provided with a set of the second cooling pipe. The second cooling pipe is connected to the first cooling pipe, and coolant circulates in the first cooling pipe and the second cooling pipe.

[0009] In one embodiment, the system further includes a water inlet and a water outlet, both of which pass through the housing and are sealed to the housing. The water inlet and water outlet are connected to the cooling module.

[0010] In one embodiment, one end of the first cooling pipe is connected through a first pipeline, and the other end of the first cooling pipe is connected through a second pipeline, with the water inlet located in the middle of the first pipeline.

[0011] The two ends of the second cooling pipe are connected to the first pipe and the second pipe, respectively.

[0012] In one embodiment, the cooling module further includes a third cooling pipe disposed in the gap between the battery modules in the middle position. One end of the third cooling pipe is connected to the second pipe, and the other end of the third cooling pipe is connected to the water outlet.

[0013] In one embodiment, the battery pack device further includes fins, wherein the first cooling pipe, the second cooling pipe, and the third cooling pipe are all serpentine pipes, and the fins are located on the plane where the corresponding second cooling pipe and the third cooling pipe are located, and the fins are embedded in the gaps around the second cooling pipe and the third cooling pipe.

[0014] In one embodiment, the battery module includes a plurality of cells arranged in sequence, with spacers between adjacent cells and straps on the outside of the battery module.

[0015] In one embodiment, the spacer is made of polycarbonate.

[0016] In one embodiment, the housing includes a top cover and a bottom plate, the battery pack is disposed on the bottom plate, the top cover is sealed to the bottom plate, an opening is provided on the side of the top cover, the water inlet and the water outlet pass through the opening, and the water inlet and the water outlet are sealed to the opening.

[0017] In one embodiment, a support frame is provided on the base plate, the support frame is located on both sides below the battery module, the support frame is arranged along the length direction of the battery module, and the first cooling pipe below each battery module is located between two support frames.

[0018] In one embodiment, the height of the support frame is 1.5 to 3 times higher than the diameter of the first cooling pipe.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] This battery pack assembly significantly improves heat dissipation efficiency, effectively controls battery operating temperature, and extends battery life by creating a cooling medium coverage area within the casing, ensuring uniform distribution of the cooling medium around each battery module. Furthermore, first and second cooling pipes are installed below the battery pack and in the gaps between battery modules. Coolant circulates through these pipes, carrying away heat from the cooling medium. Since the cooling medium does not participate in external circulation, internal flow channel design is unnecessary, greatly reducing design complexity and minimizing lateral and longitudinal temperature differences between battery modules, thus achieving effective cooling. In addition, the sealed design of the inlet and outlet ensures the reliability of the cooling system, prevents cooling medium leakage, and further guarantees the overall safety performance of the battery pack.

[0021] The second cooling pipe is arranged in a serpentine pattern, which extends the flow path of the coolant in the cooling system, allowing the cooling medium more time to exchange heat with the battery module. Fins are embedded in the gaps around the second cooling pipe, increasing the contact area between the second cooling pipe and the cooling medium, which helps to absorb the heat dissipated by the battery module more quickly. The design of the fins and the second cooling pipe being on the same plane optimizes space utilization, ensures the rationality of the cooling component layout, reduces mechanical stress caused by factors such as thermal expansion, and improves the reliability and durability of the device.

[0022] The coolant flows into the first and second cooling pipes through the middle inlet, which is conducive to the balanced distribution of the cooling medium. Since the temperature is higher closer to the center of the battery pack, one or two outlets are installed on the third cooling pipe located at the middle battery module to increase the flow rate in the pipe at the highest temperature position of the battery pack, thereby improving the cooling effect and reducing the maximum temperature of the battery pack.

[0023] In summary, this device not only effectively improves the thermal management performance of battery packs, but also reduces additional space requirements through its compact design. It is suitable for various application scenarios that require high-performance thermal management, such as electric vehicles and energy storage systems, demonstrating its superiority in practical applications and broad market potential. Attached Figure Description

[0024] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0025] Figure 1 This is an exploded view of the battery pack device in this utility model;

[0026] Figure 2 This is an exploded view of the internal structure of the shell in an embodiment of this utility model;

[0027] Figure 3 This is an exploded view of the cooling module in an embodiment of this utility model;

[0028] Figure 4 This is a partial schematic diagram of the battery module in an embodiment of this utility model.

[0029] Figure label:

[0030] 10. Shell; 11. Top cover; 12. Base plate; 13. Opening; 14. Support frame;

[0031] 20. Battery pack; 21. Battery module; 22. Battery cell; 23. Spacer; 24. Binding strap;

[0032] 30. Cooling module; 31. First cooling pipe; 32. Second cooling pipe; 33. Water inlet; 34. Water outlet; 35. First pipeline; 36. Second pipeline; 37. Third cooling pipe; 38. Fins. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] like Figure 1 As shown, the opposite sides of the battery modules 21 are called sides A.

[0035] like Figures 1-3 As shown, this utility model provides a battery pack device. The cavity inside the housing 10 is a cooling medium coverage area, and the cavity is filled with cooling medium, preferably filling the cavity completely. The cooling medium is silicone oil. The battery pack 20 is placed inside the housing 10 to ensure that the cooling medium can surround the entire battery pack 20, so that the battery module 21 can fully contact the cooling medium, thereby improving the heat conduction efficiency and heat dissipation efficiency. The battery pack 20 includes multiple battery modules 21 arranged at intervals. A gap is set between adjacent battery modules 21 so that the cooling medium can be evenly distributed in the housing 10, ensuring that each battery module 21 can contact the cooling medium.

[0036] A cooling module 30 is provided in the battery pack 20. Multiple sets of interconnected first cooling pipes 31 are provided below the battery pack 20. The first cooling pipes 31 can guide the coolant to flow through the bottom of the battery module 21 and remove heat. Multiple sets of second cooling pipes 32 are provided in the gaps between the battery modules 21 and on the outer surface of the edge battery modules 21. Each side of the battery module parallel to surface A is provided with a set of second cooling pipes. The second cooling pipes 32 are connected to the first cooling pipes 31, ensuring that the first cooling pipes 31 and the second cooling pipes 32 can act on the bottom and side surfaces of each battery module 21. The coolant, which is 50% ethylene glycol, circulates through the first cooling pipes 31 and the second cooling pipes 32, removing heat from the cooling medium. The cooling medium does not participate in the external circulation of the battery pack 20, so there is no need to consider the internal flow channel design of the battery pack 20, which greatly reduces the design difficulty, reduces the lateral and longitudinal temperature difference of the battery module 21, and enables each battery module 21 to be effectively cooled.

[0037] Furthermore, an inlet 33 and an outlet 34 are provided, which pass through the housing 10 and are sealed to the housing 10. The inlet 33 and the outlet 34 are respectively located at both ends of the cooling module 30.

[0038] This battery pack assembly creates a cooling medium coverage area within the housing 10, ensuring uniform distribution of the cooling medium around each battery module 21. This significantly improves heat dissipation efficiency, effectively controls battery operating temperature, and extends battery life. Furthermore, a first cooling pipe 31 and a second cooling pipe 32 are installed below the battery pack 20 and in the gaps between the battery modules 21. Coolant circulates through these pipes, carrying away heat from the cooling medium. Since the cooling medium does not participate in external circulation, internal flow channel design is unnecessary, greatly reducing design complexity and minimizing the lateral and longitudinal temperature differences between the battery modules 21, thus achieving effective cooling. In addition, the sealed design of the inlet 33 and outlet 34 ensures the reliability of the cooling system, prevents cooling medium leakage, and further guarantees the overall safety performance of the battery pack 20.

[0039] Preferably, the first cooling pipe 31 is positioned directly below the battery module 21 to ensure that the heat emitted from the bottom of the battery module 21 can be directly transferred to the first cooling pipe 31 through the cooling medium, thereby quickly removing the heat generated by the battery module 21.

[0040] Specifically, the two ends of the first cooling pipe 31 and the second cooling pipe 32 are connected to the first pipe 35 and the second pipe 36 respectively, and the other end of the first cooling pipe 31 is connected through the second pipe 36. The water inlet 33 is located in the middle of the first pipe 35; the water outlet 34 is located on the second pipe 36.

[0041] Coolant flows into the first pipe 35 through the inlet 33, and then splits into the first cooling pipe 31 and the second cooling pipe 32. After the first cooling pipe 31 and the second cooling pipe 32 remove the heat from the side and bottom of the battery module 21, they enter the second pipe 36 and merge, and then flow out through the outlet 34.

[0042] Alternatively, one end of the first cooling pipe 31 is connected through the first pipe 35, and the inlet 33 is located in the middle of the first pipe 35; one end of the second cooling pipe 32 is connected to the end of the first cooling pipe 31 away from the first pipe 35, and the other end of the second cooling pipe 32 is connected through the second pipe 36, and the outlet 34 is located on the second pipe 36.

[0043] The coolant flows into the first pipe 35 through the inlet 33, splits into the first cooling pipe 31, then flows into the second cooling pipe 32 through the first cooling pipe 31, and then enters the second pipe 36 to merge, and flows out through the outlet 34.

[0044] Alternatively, one end of a portion of the first cooling pipe 31 and the second cooling pipe 32 can be connected to the first pipe 35 and the second pipe 36 respectively. The water inlet 33 is set on the first pipe 35. One end of the remaining first cooling pipe 31 and the second cooling pipe 32 is connected to the second pipe 36, and the other end of the remaining first cooling pipe 31 and the second cooling pipe 32 is connected to the water outlet 34.

[0045] The coolant flows into the first pipe 35 through the inlet 33, is divided into a portion of the first cooling pipe 31 and the second cooling pipe 32, and then flows into the remaining first cooling pipe 31 and the second cooling pipe 32 through the second pipe 36, and finally flows out through the outlet 34.

[0046] Preferred, such as Figure 2 , Figure 3 As shown, the two ends of the first cooling pipe 31 and the second cooling pipe 32 are connected to the first pipe 35 and the second pipe 36 respectively. The other end of the first cooling pipe 31 is connected through the second pipe 36. The water inlet 33 is located in the middle of the first pipe 35. The water outlet 34 is located on the second pipe 36. The cooling module 30 also includes a third cooling pipe 37, which is located in the gap between the battery modules 21 in the middle position. One end of the third cooling pipe 37 is connected to the second pipe 36, and the other end of the third cooling pipe 37 is connected to the water outlet 34.

[0047] The coolant flows into the first pipe 35 through the inlet 33, and then splits into the first cooling pipe 31 and the second cooling pipe 32. After the first cooling pipe 31 and the second cooling pipe 32 remove the heat from the side and bottom of the battery module 21, they enter the second pipe 36 to merge, and finally flow into the third cooling pipe 37 and out through the outlet 34.

[0048] The coolant flows into the first cooling pipe 31 and the second cooling pipe 32 through the middle inlet 33, which is conducive to the balanced distribution of the cooling medium. Since the temperature is higher closer to the center of the battery pack 20, one or two outlets 34 are installed on the third cooling pipe 37 located at the middle battery module 21 to increase the flow rate of the pipe at the highest temperature position of the battery pack 20, thereby improving the cooling effect and reducing the highest temperature of the battery pack 20. Of course, if it is considered that the coolant flowing into the third cooling pipe 37 will increase in temperature due to absorbing some heat, the inlet 33 and outlet 34 can be swapped so that the coolant enters the third cooling pipe 37 first from the inlet 33, then flows into the first cooling pipe 31 and the second cooling pipe 32, and finally flows out from the outlet 34. First, the coolant at a lower temperature directly exchanges heat with the battery module 21 in the middle position, and then absorbs the heat emitted by the battery modules 21 on both sides, which can further enhance the cooling effect of the battery module 21 in the middle position.

[0049] like Figure 3 As shown, in the cooling module 30, the first cooling pipe 31, the second cooling pipe 32, and the third cooling pipe 37 are all serpentine tubes to increase the contact area between the cooling medium and the battery module 21, thereby improving the heat exchange efficiency. The fins 38 are located on the plane where the corresponding second cooling pipe 32 and third cooling pipe 37 are located, and the fins 38 are embedded in the gaps around the second cooling pipe 32 and the third cooling pipe 37. Specifically, the fins 38 can be a whole, with a long strip groove provided on one end face of the whole fin 38. The second cooling pipe 32 and the third cooling pipe 37 are set in the long strip groove. The fins 38 can also be set as multiple pieces, with multiple fins 38 set in the gaps of the serpentine tubes. The cooperation between the fins 38 and the serpentine tubes makes full use of the limited space, increases the contact area between the second cooling pipe 32 and the third cooling pipe 37 and the cooling medium, accelerates heat transfer, and makes the temperature on the second cooling pipe 32 and the third cooling pipe 37 uniform.

[0050] Specifically, such as Figure 4 As shown, the battery module 21 includes multiple cells 22 arranged in sequence. A spacer 23 is provided between adjacent cells 22. The spacer 23 is made of polycarbonate material to ensure stable isolation between the cells 22. A cooling medium is filled between the cells 22 to help the cooling medium conduct heat between the cells 22. A strap 24 is also provided on the outside of the battery module 21. The strap 24 can be made of steel strip to fix the cells 22 and prevent the cells 22 from shifting during vibration or movement, thereby improving the overall structural stability and safety of the battery module 21.

[0051] Specifically, the housing 10 includes an upper cover 11 and a bottom plate 12. The battery pack 20 is mounted on the bottom plate 12. The upper cover 11 is sealed to the bottom plate 12 to ensure the waterproof and dustproof performance of the battery pack 20. An opening 13 is provided on the side of the upper cover 11. A water inlet 33 and a water outlet 34 pass through the opening 13 and are connected to the external cooling system. The water inlet 33 and the water outlet 34 are sealed to the opening 13 to prevent the cooling medium inside the housing 10 from leaking, thus ensuring the normal operation of the cooling system and the safety of the battery pack 20.

[0052] Furthermore, a support frame 14 is provided on the base plate 12. The support frame 14 is located on both sides below the battery module 21 and is arranged along the length of the battery module 21. The first cooling pipe 31 under each battery module 21 is located between two support frames 14. The height of the support frame 14 is designed to be 1.5 to 3 times higher than the diameter of the first cooling pipe 31 to ensure stable support of the battery module 21 and leave enough space to accommodate the cooling pipe. At the same time, it allows the cooling medium to effectively contact the battery module 21 and ensures the efficient operation of the cooling system.

[0053] In addition, when the number of battery modules 21 is even, the gaps between battery modules 21 are odd. Therefore, only one third cooling pipe 37 is set in the middle position, and one water inlet 33 and one water outlet 34 are set. The center lines of the water inlet 33 and the water outlet 34 are set on the middle section of the battery pack 20.

[0054] When the number of battery modules 21 is odd, the number of gaps between battery modules 21 is even. A third cooling pipe 37 is set in the two middle gaps. The water outlet 34 can be set as one and connected to the outlet of the two third cooling pipes 37, so that the center lines of the water inlet 33 and the water outlet 34 are both located on the middle section of the battery pack 20. Alternatively, the water outlet 34 can be set as two, and the two water outlets 34 are respectively connected to the outlet of the corresponding third cooling pipe 37. The center line of the water inlet 33 is located on the middle section of the battery pack 20, and the water outlets 34 are symmetrically arranged on both sides of the middle section of the battery pack 20.

[0055] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery pack device, characterized in that, include: The housing has an internal cavity that is a cooling medium-covered area, and the internal cavity is filled with cooling medium. A battery pack, wherein the battery pack is disposed within the housing, and the battery pack includes a plurality of battery modules arranged at intervals. The cooling module includes a first cooling pipe and a second cooling pipe. There are multiple sets of the first cooling pipe, and each battery module has a set of the first cooling pipe below it. There are multiple sets of the second cooling pipe, which are spaced apart. Each side of the battery module parallel to surface A is provided with a set of the second cooling pipe. The second cooling pipe is connected to the first cooling pipe, and coolant circulates in the first cooling pipe and the second cooling pipe.

2. The battery pack device according to claim 1, characterized in that, It also includes a water inlet and a water outlet, both of which pass through the housing and are sealed to the housing. The water inlet and the water outlet are connected to the cooling module.

3. The battery pack device according to claim 2, characterized in that, One end of the first cooling pipe is connected through a first pipeline, and the other end of the first cooling pipe is connected through a second pipeline. The water inlet is located in the middle of the first pipeline. The two ends of the second cooling pipe are connected to the first pipe and the second pipe, respectively.

4. The battery pack device according to claim 3, characterized in that, The cooling module also includes a third cooling pipe, which is disposed in the gap between the battery modules in the middle position. One end of the third cooling pipe is connected to the second pipe, and the other end of the third cooling pipe is connected to the water outlet.

5. The battery pack device according to claim 4, characterized in that, The battery pack assembly also includes fins. The first cooling pipe, the second cooling pipe, and the third cooling pipe are all serpentine pipes. The fins are located on the plane where the corresponding second cooling pipe and the third cooling pipe are located, and the fins are embedded in the gaps around the second cooling pipe and the third cooling pipe.

6. The battery pack device according to claim 1, characterized in that, The battery module includes multiple cells arranged in sequence, with spacers between adjacent cells and straps on the outside of the battery module.

7. The battery pack device according to claim 6, characterized in that, The material of the spacer is polycarbonate.

8. The battery pack device according to claim 2, characterized in that, The housing includes a top cover and a bottom plate. The battery pack is mounted on the bottom plate. The top cover is sealed to the bottom plate. An opening is provided on the side of the top cover. The water inlet and water outlet pass through the opening and are sealed to each other.

9. The battery pack device according to claim 8, characterized in that, The base plate is provided with a support frame, which is located on both sides below the battery module. The support frame is arranged along the length of the battery module, and the first cooling pipe under each battery module is located between two support frames.

10. The battery pack device according to claim 9, characterized in that, The height of the support frame is 1.5 to 3 times higher than the diameter of the first cooling pipe.

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