A partitioned battery pack

Abstract

The utility model relates to battery pack technical field especially, more particularly to a partition formula battery pack, including lower casing and liquid cooling assembly, the lower casing has successively formed first installation area, avoidance area and second installation area on, first installation area and second installation area are all used for installing electric core module, the avoidance area is used for avoiding vehicle structure and installing electrical components, liquid cooling assembly includes setting up first liquid cooling plate group of first installation area, setting up second liquid cooling plate group of second installation area and the liquid cooling pipe assembly of intercommunication first liquid cooling plate group with second liquid cooling plate group, first liquid cooling plate group and second liquid cooling plate group are detachably connected through liquid cooling pipe assembly, the partition formula battery pack provided by the utility model can be flexible to adapt to vehicle chassis structure to improve space utilization, and can solve the manufacturing, assembly and maintenance problem of large size liquid cooling system.

Description

Technical Field

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

[0002] With the rapid development of the new energy vehicle industry, the power battery pack, as a core component, is receiving increasing attention for its integration efficiency, safety performance, and maintainability. Traditional battery pack lower casings are typically designed as regular rectangular spaces to maximize the capacity of the battery cell modules, but this design struggles to adapt to the diverse structures of vehicle chassis. The central area of ​​the vehicle chassis often contains protruding or recessed structures such as exhaust pipe channels, drive shaft channels, or reinforcing beams, making it difficult to install standard rectangular battery packs or encroaching on passenger compartment space. To circumvent these structures, one solution is to design the battery pack in an irregular shape, but this makes it impossible to arrange complete battery cell modules in non-rectangular areas, resulting in wasted space. Another solution is to sacrifice battery pack capacity by reducing its overall size to avoid obstacles, but this directly reduces the vehicle's driving range.

[0003] In terms of thermal management, large-size battery packs typically employ liquid cooling systems. For battery packs with a large coverage area, the liquid cooling plates are often enormous. Current technologies mostly use integrated liquid cooling plates, which can be over two meters long. This integrated structure has significant drawbacks: First, the manufacturing process is complex, requiring high-quality materials and processing equipment, making yield control difficult; second, once manufactured, defects in the internal flow channels are difficult to repair, leading to complete scrapping and high costs; third, during transportation and assembly, such large components are prone to impacts and deformation, posing a high risk of damage; finally, if partial damage to the battery pack requires repair, the entire liquid cooling system often needs to be replaced, resulting in extremely high maintenance costs and operational inconvenience. Therefore, improvements to existing battery packs are needed to address these technical problems. Utility Model Content

[0004] This invention provides a partitioned battery pack that can flexibly adapt to the vehicle chassis structure to improve space utilization, and also solve the manufacturing, assembly and maintenance problems of large-size liquid cooling systems.

[0005] This utility model provides a partitioned battery pack, comprising:

[0006] The lower housing has a first mounting area, a clearance area, and a second mounting area formed sequentially on it; the first and second mounting areas are both used to install battery cell modules, and the clearance area is used to avoid vehicle structures and install electrical components.

[0007] The liquid cooling assembly includes a first liquid cooling plate group disposed in the first mounting area, a second liquid cooling plate group disposed in the second mounting area, and a liquid cooling pipe assembly connecting the first liquid cooling plate group and the second liquid cooling plate group. The first liquid cooling plate group and the second liquid cooling plate group are detachably connected through the liquid cooling pipe assembly.

[0008] In one embodiment of the present invention, the volume of the first installation area is different from the volume of the second installation area, and the liquid cooling pipe assembly is provided with a flow limiting structure for adjusting the flow rate of the coolant flowing through the first liquid cooling plate group and the second liquid cooling plate group.

[0009] In one embodiment of this utility model, the flow-limiting structure is one or more of a throttling orifice and a variable diameter pipe section.

[0010] In one embodiment of the present invention, both the first liquid cooling plate group and the second liquid cooling plate group include liquid cooling plate components. An elastic heat insulation pad is provided between the liquid cooling plate component and the bottom surface of the lower housing. The total thickness of the elastic heat insulation pad and the liquid cooling plate component is higher than the height of the support surface of the lower housing for the battery cell module.

[0011] In one embodiment of the present invention, both the first liquid cooling plate group and the second liquid cooling plate group include liquid cooling plate components, wherein the liquid cooling plate components are flat and have multiple parallel flow channels inside.

[0012] In one embodiment of the present invention, the first liquid cooling plate group includes a plurality of liquid cooling plate components, and at least some of the liquid cooling plate components are fluidly connected in parallel.

[0013] In one embodiment of the present invention, the second liquid cooling plate assembly includes a plurality of said liquid cooling plate components, and at least some of the said liquid cooling plate components are fluidly connected in series.

[0014] In one embodiment of the present invention, the length direction of the first liquid cooling plate group is consistent with the length direction of the cell module in the first mounting area, and the length direction of the second liquid cooling plate group is consistent with the length direction of the cell module in the second mounting area.

[0015] In one embodiment of the present invention, the liquid cooling pipe assembly includes:

[0016] The liquid inlet branch assembly has a main inlet and two branch outlets that are detachably connected to the inlet of the first liquid cooling plate assembly and the inlet of the second liquid cooling plate assembly, respectively;

[0017] The return liquid branch assembly has two branch inlets that are detachably connected to the outlets of the first liquid cooling plate group and the second liquid cooling plate group, respectively, and a main outlet.

[0018] In one embodiment of this utility model, the avoidance area is an inwardly recessed notch or channel.

[0019] In one embodiment of the present invention, the liquid inlet branch assembly includes a first liquid cooling pipe and a second liquid cooling pipe that are detachably connected, and the liquid return branch assembly includes a third liquid cooling pipe and a fourth liquid cooling pipe that are detachably connected.

[0020] The first liquid cooling pipe is connected to the inlet of the first liquid cooling plate group, the second liquid cooling pipe is connected to the inlet of the second liquid cooling plate group, the third liquid cooling pipe is connected to the outlet of the second liquid cooling plate group, and the fourth liquid cooling pipe is connected to the outlet of the first liquid cooling plate group.

[0021] In one embodiment of the present invention, the first liquid cooling plate assembly includes a first inlet pipe, a first outlet pipe, and at least three first liquid cooling plate components;

[0022] One of the first liquid cooling plates has an inlet connected to the first liquid cooling pipe and an outlet connected to the first inlet pipe. Another first liquid cooling plate has an inlet connected to the first outlet pipe and an outlet connected to the fourth liquid cooling pipe. The remaining first liquid cooling plates have one end connected to the first inlet pipe and the other end connected to the first outlet pipe.

[0023] In one embodiment of the present invention, the second liquid cooling plate assembly includes a second inlet pipe, a transfer pipe, a second outlet pipe, and a plurality of second liquid cooling plate components;

[0024] The second liquid cooling pipe is connected to the second inlet pipe, and the third liquid cooling pipe is connected to the second outlet pipe; the inlet of a portion of the second liquid cooling plate is connected to the second inlet pipe, and the outlet of this portion of the second liquid cooling plate is connected to the inlet of another portion of the second liquid cooling plate through the adapter pipe, and the outlet of this other portion of the second liquid cooling plate is connected to the second outlet pipe.

[0025] In one embodiment of the present invention, the first liquid cooling pipe and the second liquid cooling pipe, as well as the third liquid cooling pipe and the fourth liquid cooling pipe, are detachably connected by quick-connect couplings.

[0026] In one embodiment of the present invention, the battery pack further includes an aluminum busbar disposed therein, the aluminum busbar contacting the battery cell or the lower housing for heat dissipation.

[0027] In one embodiment of the present invention, a strip-shaped groove and a partition plate for limiting the battery module are provided on the inner bottom side of the lower housing.

[0028] The beneficial effects of this utility model are as follows: This utility model proposes a partitioned battery pack. Through a partitioned design on the lower casing, a clearance zone is set up to avoid obstacles from vehicle structures. Space that cannot be used to install complete cell modules is used to arrange electrical components such as the battery management system. This perfectly adapts to the complex structure of the chassis while ensuring battery pack capacity, improving the overall vehicle space layout efficiency and battery pack space utilization. Simultaneously, by designing the liquid cooling assembly as a first and second liquid cooling plate group detachably connected via liquid cooling pipe assemblies, the traditional integrated large liquid cooling plate is decomposed into multiple modular cooling units that can be independently manufactured, transported, and installed. This split design reduces the manufacturing difficulty and process cost of the liquid cooling plate, improving production yield. Each liquid cooling plate group can be independently inspected and tested, ensuring product quality. Smaller components are easier to handle during transportation and assembly, reducing the risk of damage. Furthermore, when a liquid cooling plate group in a certain area fails, rapid partial disassembly, repair, or replacement can be achieved without disassembling the entire battery pack or replacing the entire liquid cooling system, significantly improving the maintainability and service life of the battery pack and reducing the total life cycle cost. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0030] In the attached diagram:

[0031] Figure 1 The lower housing and the liquid cooling assembly arranged in the lower housing are provided as an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the front structure of the liquid cooling component provided in one embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the back structure of the liquid cooling component provided in one embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the overall structure of the lower shell provided in one embodiment of the present invention;

[0035] Figure 5 This is a lower housing and a battery cell module inside the lower housing provided in one embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the upper shell structure provided in one embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the overall structure of the battery pack provided in one embodiment of the present invention;

[0038] Figure 8 This is a cross-sectional view of the first mounting area of ​​the battery pack provided in one embodiment of the present invention;

[0039] The attached figures are labeled as follows: lower housing 1, first mounting area 11, clearance area 12, second mounting area 13, strip groove 101, partition plate 102, support surface 103, elastic insulation pad 104, battery cell module 2, electrical components 21, upper housing 22, liquid cooling assembly 3, first liquid cooling plate assembly 31, first inlet pipe 311, first outlet pipe 312, first liquid cooling plate 313, second liquid cooling plate assembly 32, second inlet pipe 321, adapter pipe 322, second outlet pipe 323, second liquid cooling plate 324, liquid cooling pipe assembly 33, liquid inlet branch assembly 331, first liquid cooling pipe 3311, second liquid cooling pipe 3312, liquid return branch assembly 332, third liquid cooling pipe 3321, fourth liquid cooling pipe 3322, quick-connect connector 3323. Detailed Implementation

[0040] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0042] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0043] Please see Figure 1 This utility model provides a partitioned battery pack, including a lower housing 1 and a liquid cooling assembly 3;

[0044] The lower housing 1 has a first mounting area 11, a clearance area 12, and a second mounting area 13 formed sequentially; the first mounting area 11 and the second mounting area 13 are both used to mount the battery cell module 2, and the clearance area 12 is used to avoid the vehicle structure and to mount electrical components 21.

[0045] The liquid cooling assembly 3 includes a first liquid cooling plate group 31 disposed in the first mounting area 11, a second liquid cooling plate group 32 disposed in the second mounting area 13, and a liquid cooling pipe assembly 33 connecting the first liquid cooling plate group 31 and the second liquid cooling plate group 32. The first liquid cooling plate group 31 and the second liquid cooling plate group 32 are detachably connected through the liquid cooling pipe assembly 33.

[0046] It should be noted that the lower housing 1 achieves adaptive utilization of the vehicle chassis space by sequentially forming a first mounting area 11, a clearance area 12, and a second mounting area 13. The first mounting area 11 and the second mounting area 13 serve as the main mounting spaces for the battery cell module 2. Their specific shapes can be designed as rectangles, polygons, or other irregular shapes according to actual needs to adapt to the chassis layout of different vehicle models and maximize the accommodation of the battery cell module 2. The clearance area 12 is specifically designed based on the protruding or recessed structures such as exhaust pipe channels, drive shaft channels, or reinforcing beams existing in the vehicle chassis. Its shape can be a groove, clearance notch, or stepped structure matching the aforementioned structures, thereby effectively avoiding the vehicle structure. Simultaneously, the clearance area 12 can also be used to install various electrical components 21, including but not limited to battery management system (BMS) controllers, relays, fuses, connectors, etc., achieving functional area integration and efficient space utilization.

[0047] The liquid cooling assembly 3 comprises a first liquid cooling plate group 31, a second liquid cooling plate group 32, and a liquid cooling pipe assembly 33 connecting the two, forming a modular heat dissipation structure. The first liquid cooling plate group 31 and the second liquid cooling plate group 32 can be configured according to the size and heat dissipation requirements of the corresponding installation area. They can be independent units composed of a single liquid cooling plate or combined units composed of multiple liquid cooling plates connected in series or parallel. The liquid cooling pipe assembly 33, as the key component connecting the two, can be made of rigid metal pipes (such as aluminum pipes or copper pipes) or flexible hoses (such as high-pressure resistant rubber hoses or composite hoses). The connection method can be a detachable structure such as flange connection, threaded connection, or quick connector connection, ensuring flexible assembly and disassembly between the first liquid cooling plate group 31 and the second liquid cooling plate group 32. The above structural design effectively solves the problems of installation difficulties, space waste, and limited battery pack capacity caused by the difficulty of adapting traditional rectangular battery packs to the diverse vehicle chassis structures. By avoiding vehicle obstacles through the avoidance zone 12, the first installation zone 11 and the second installation zone 13 make full use of the remaining space to arrange the cell modules 2, improving space utilization and battery pack capacity, thereby helping to improve the vehicle's driving range. At the same time, the partitioned setting of the liquid cooling component 3 replaces the traditional large-size integrated liquid cooling plate, which not only reduces the manufacturing difficulty and the requirements for processing equipment, which is conducive to improving the yield rate, but also reduces the risk of bumps and deformation during transportation and assembly. Moreover, since the first liquid cooling plate group 31, the second liquid cooling plate group 32 and the liquid cooling pipe assembly 33 are detachably connected, when the liquid cooling system is partially damaged, the corresponding parts can be replaced individually without the need for overall scrapping, which greatly reduces maintenance costs and operational difficulty.

[0048] Please see Figure 1 and 5 As an optional embodiment of this utility model, the volume of the first installation area 11 is different from the volume of the second installation area 13, and the liquid cooling pipe assembly 33 is provided with a flow limiting structure for adjusting the flow rate of the coolant flowing through the first liquid cooling plate group 31 and the second liquid cooling plate group 32.

[0049] It should be noted that the volume of the first installation area 11 is different from the volume of the second installation area 13. For example, the volume of the first installation area 11 is smaller than the volume of the second installation area 13. This design can adapt to the installation requirements of different numbers or specifications of battery cell modules 2. For example, when there is more space on one side of the vehicle chassis, the first installation area 11 can be designed with a larger volume to accommodate more battery cells, while the second installation area 13 with a smaller volume is set on the other side according to the remaining space, thereby maximizing the use of space while avoiding the vehicle structure. The flow-limiting structure provided in the liquid cooling pipe assembly 33 is used to regulate the flow rate of coolant flowing through the first liquid cooling plate group 31 and the second liquid cooling plate group 32. It can distribute the flow rate according to the difference in heat generation of the battery cells in the two installation areas. For example, when there are more battery cells and the heat generation is greater in the first installation area 11, the flow rate to the first liquid cooling plate group 31 is increased by the flow-limiting structure, and vice versa. This design solves the problem that traditional liquid cooling systems have fixed flow distribution and cannot adapt to the different heat dissipation needs of different areas. By changing the flow resistance of the coolant in different liquid cooling plate groups through the flow limiting structure, the flow rate can be dynamically adjusted, thereby achieving a balanced heat dissipation effect in each area. This avoids the degradation of cell performance or shortening of life due to insufficient local heat dissipation, while reducing unnecessary energy consumption and improving the heat dissipation efficiency of the liquid cooling system.

[0050] As an optional embodiment of this utility model, the flow-limiting structure is one or more of a throttling orifice, a variable diameter pipe section, etc.

[0051] It should be noted that the flow-limiting structure employs one or more of the following: a throttling orifice and a variable-diameter pipe section. The throttling orifice can be configured with different cross-sectional shapes, such as circular or polygonal, and flow rate is adjusted by changing the cross-sectional area of ​​the orifice. The variable-diameter pipe section can be designed as a tapered or stepped type, changing the coolant velocity and flow rate by varying the inner diameter of the pipe section. When multiple flow-limiting structures are combined, such as connecting a throttling orifice and a variable-diameter pipe section in series in the liquid cooling pipe assembly 33, more precise flow control can be achieved. This design solves the problem of limited adjustment range caused by a single type of flow-limiting structure. By using throttling orifices or variable-diameter pipe sections to change the cross-sectional area of ​​the flow channel, the fluid resistance is adjusted to control the flow rate, thus providing diversified flow regulation methods to adapt to different heat dissipation scenarios. Furthermore, the structure is simple, easy to manufacture and integrate, reducing the design difficulty of the liquid cooling system.

[0052] Please see Figure 1-3As an optional embodiment of this utility model, both the first liquid cooling plate group 31 and the second liquid cooling plate group 32 include liquid cooling plate components (the first liquid cooling plate component 313 in the first liquid cooling plate group 31 and the second liquid cooling plate component 324 in the second liquid cooling plate group 32). An elastic heat insulation pad 104 is provided between the liquid cooling plate component (the first liquid cooling plate component 313 and the second liquid cooling plate component 324) and the bottom surface of the lower housing 1. The total thickness of the elastic heat insulation pad 104 and the liquid cooling plate component (the first liquid cooling plate component 313 or the second liquid cooling plate component 324) is higher than the height of the support surface 103 of the lower housing 1 for the battery cell module 2.

[0053] It should be noted that both the first liquid cooling plate assembly 31 and the second liquid cooling plate assembly 32 include liquid cooling plate components (the first liquid cooling plate component 313 in the first liquid cooling plate assembly 31 and the second liquid cooling plate component 324 in the second liquid cooling plate assembly 32). An elastic insulation pad 104 is provided between the liquid cooling plate component and the bottom surface of the lower housing 1. The material can be silicone, foamed rubber, or other materials with elasticity and heat insulation properties. This reduces heat transfer between the liquid cooling plate component and the lower housing 1, preventing the influence of ambient temperature on the liquid cooling system, and also buffers the impact of external vibrations on the liquid cooling plate component through its own elasticity. The total thickness of the elastic insulation pad 104 and the liquid cooling plate component is higher than the height of the support surface 103 of the lower housing 1 for the battery cell module 2. This design ensures that when the battery cell module 2 is installed in place, the liquid cooling plate component will be subjected to the pressure of the battery cell module 2, causing the elastic insulation pad 104 to deform elastically, thereby allowing the liquid cooling plate component to fit tightly against the battery cell module 2. This structure solves the problem of low heat transfer efficiency caused by assembly gaps between traditional liquid cooling plates and battery cell modules. By using the elasticity of the elastic insulation pad 104 to compensate for gaps caused by assembly errors and vibrations, it ensures effective contact between the liquid cooling plate and the battery cell module 2. At the same time, the insulation pad reduces heat loss to the external environment. The technical effect is to improve heat dissipation efficiency, make the temperature of the battery cell module 2 more uniform, enhance the vibration resistance of the liquid cooling system, and extend its service life.

[0054] Please see Figure 1-3 7. As an optional embodiment of the present utility model, the first liquid cooling plate group 31 and the second liquid cooling plate group 32 both include liquid cooling plate components (the first liquid cooling plate component 313 in the first liquid cooling plate group 31 and the second liquid cooling plate component 324 in the second liquid cooling plate group 32), and the liquid cooling plate component is flat and has multiple parallel flow channels inside.

[0055] It should be noted that the liquid cooling plates (first liquid cooling plate 313 and second liquid cooling plate 324) included in the first liquid cooling plate group 31 and the second liquid cooling plate group 32 adopt a flat design. This shape can adapt to the installation space of the cell module 2, reduce the occupation of the longitudinal space inside the battery pack, and increase the contact area with the cell module 2 to improve heat transfer efficiency. The multiple parallel flow channels inside the liquid cooling plates (first liquid cooling plate 313 and second liquid cooling plate 324) can make the coolant evenly distributed within the plate. The cross-sectional shape of the flow channels can be rectangular, circular, or polygonal, and the spacing of the flow channels can be set to equal or unequal according to the heat dissipation requirements. This design solves the problem of uneven heat dissipation caused by unreasonable structural design of traditional liquid cooling plates. By increasing the contact area through the flat structure and using parallel flow channels to ensure that the coolant flows along a consistent path and has a balanced flow distribution within the liquid cooling plate, uniform heat dissipation of the cell module 2 is achieved, avoiding local overheating that affects cell performance, while also improving the spatial adaptability of the liquid cooling plates.

[0056] Please see Figure 1-3 As an optional embodiment of the present invention, the first liquid cooling plate group 31 includes a plurality of liquid cooling plates (first liquid cooling plates 313), and at least some of the liquid cooling plates (first liquid cooling plates 313) are fluidly connected in parallel.

[0057] It should be noted that among the multiple liquid cooling plates (first liquid cooling plates 313) included in the first liquid cooling plate group 31, at least some are fluidly connected in parallel, that is, the coolant inlets and outlets of these liquid cooling plates (first liquid cooling plates 313) are interconnected, forming parallel coolant passages. In specific implementation, the inlets of multiple liquid cooling plates (first liquid cooling plates 313) can be connected by a manifold, and the outlets can be connected by a manifold, or an integrated manifold can be used to achieve parallel connection; the number of liquid cooling plates (first liquid cooling plates 313) connected in parallel can be adjusted according to the size of the first installation area 11 and the heat dissipation requirements, for example, two liquid cooling plates (first liquid cooling plates 313) can be connected in parallel or three or more liquid cooling plates (first liquid cooling plates 313) can be partially connected in parallel. This design solves the problem that a single large-size liquid cooling plate is difficult to adapt to the complex layout of the first installation area 11 and has limited heat dissipation efficiency. By connecting them in parallel, each liquid cooling plate (first liquid cooling plate 313) can independently undertake part of the heat dissipation task, and the coolant flow can be allocated as needed, thereby improving the flexibility and redundancy of the heat dissipation system. When a single liquid cooling plate (first liquid cooling plate 313) is damaged, it does not affect the overall function, reducing maintenance costs, while adapting to the spatial characteristics of the first installation area 11.

[0058] Please see Figure 1-3As an optional embodiment of the present invention, the second liquid cooling plate group 32 includes a plurality of liquid cooling plates (second liquid cooling plates 324), and at least some of the liquid cooling plates (second liquid cooling plates 324) are fluidly connected in series.

[0059] It should be noted that, among the multiple liquid-cooled plates (second liquid-cooled plates 324) included in the second liquid-cooled plate assembly 32, at least some are fluidly connected in series. That is, the coolant outlet of the previous liquid-cooled plate (second liquid-cooled plate 324) is connected to the inlet of the next liquid-cooled plate (second liquid-cooled plate 324), forming a continuous coolant path. The series connection can be achieved by directly connecting the inlet and outlet of the liquid-cooled plates (second liquid-cooled plates 324) with pipes, or by using transition joints to achieve a sealed connection. The number of liquid-cooled plates (second liquid-cooled plates 324) connected in series can be determined according to the length of the second installation area 13 and the heat dissipation requirements. This design solves the problem of difficult arrangement of liquid-cooled plates (second liquid-cooled plates 324) when the space of the second installation area 13 is narrow and long. By connecting in series, the coolant flows through multiple liquid-cooled plates (second liquid-cooled plates 324) sequentially, extending the heat dissipation path, enhancing the heat exchange effect, achieving efficient heat dissipation in a limited space, and simplifying the piping layout while reducing assembly complexity.

[0060] Please see Figure 1-3 As an optional embodiment of this utility model, the length direction of the first liquid cooling plate group 31 is consistent with the length direction of the cell module 2 in the first mounting area 11, and the length direction of the second liquid cooling plate group 32 is consistent with the length direction of the cell module 2 in the second mounting area 13.

[0061] It should be noted that the length direction of the first liquid cooling plate group 31 is consistent with the length direction of the cell module 2 in the first mounting area 11, and the length direction of the second liquid cooling plate group 32 is consistent with the length direction of the cell module 2 in the second mounting area 13. That is, the long side extension direction of the liquid cooling plate group is parallel to the long side extension direction of the cell module 2 in the corresponding area, so that the liquid cooling plate group can completely cover the length range of the cell module 2. In specific implementation, if the cell module 2 is arranged horizontally due to installation space limitations, the length direction of the liquid cooling plate group is also adjusted to be horizontal to maintain consistency with the direction of the cell module 2. This design solves the problem of insufficient contact area and uneven heat dissipation caused by misalignment between the liquid cooling plate group and the cell module 2. By maximizing the contact area between the liquid cooling plate group and the cell module 2 through directional matching, it ensures that the heat of each part of the cell module 2 can be evenly transferred to the liquid cooling plate group, thereby improving the heat transfer efficiency, making the temperature distribution of the cell module 2 more uniform, and effectively extending the service life of the cell.

[0062] Please see Figure 1-3 As an optional embodiment of the present invention, the liquid cooling pipe assembly 33 includes an inlet branch assembly 331 and a return branch assembly 332;

[0063] The liquid inlet branch assembly 331 has a main inlet and two branch outlets that are detachably connected to the inlet of the first liquid cooling plate group 31 and the inlet of the second liquid cooling plate group 32, respectively; the liquid return branch assembly 332 has two branch inlets and a main outlet that are detachably connected to the outlet of the first liquid cooling plate group 31 and the outlet of the second liquid cooling plate group 32, respectively.

[0064] It should be noted that the inlet branch assembly 331 in the liquid cooling pipe assembly 33 receives coolant through a main inlet and then supplies coolant to the first liquid cooling plate group 31 and the second liquid cooling plate group 32 through two branch outlets respectively. The detachable connection between the branch outlets and the inlets of the liquid cooling plate groups can be a threaded connection or a snap-fit ​​connection. The return branch assembly 332 receives coolant from the first liquid cooling plate group 31 and the second liquid cooling plate group 32 through two branch inlets respectively, and then returns it through the main outlet. The connection between the branch inlets and the outlets of the liquid cooling plate groups can also adopt the aforementioned detachable structure. This design solves the problem of fixed connections and difficulty in individual maintenance of traditional liquid cooling pipes. By using a branch structure to achieve the diversion and convergence of coolant, and combining it with detachable connections, each liquid cooling plate group can be independently disassembled and assembled. The technical effect is to improve the maintenance flexibility of the liquid cooling system and reduce the repair cost of local faults.

[0065] Please see Figure 4 As an optional embodiment of this utility model, the avoidance area 12 is an inwardly recessed notch or channel.

[0066] It should be noted that the clearance zone 12 is designed as an inwardly recessed notch or channel. The notch can accommodate raised structures on the vehicle chassis, such as the bulge formed by the exhaust pipe, while the channel can accommodate through-type components such as the drive shaft. This design solves the installation difficulties or space waste caused by the inability of traditional rectangular battery packs to avoid vehicle structures. By forming a complementary space with the vehicle's obstruction parts through the recessed structure, it avoids interference without occupying extra space. The technical effect is to improve the adaptability of the battery pack to the vehicle chassis, and reduce the encroachment on the passenger compartment space while ensuring the battery pack capacity.

[0067] Please see Figure 1-3 As an optional embodiment of the present invention, the liquid inlet branch assembly 331 includes a first liquid cooling pipe 3311 and a second liquid cooling pipe 3312 that are detachably connected, and the liquid return branch assembly 332 includes a third liquid cooling pipe 3321 and a fourth liquid cooling pipe 3322 that are detachably connected.

[0068] The first liquid cooling pipe 3311 is connected to the inlet of the first liquid cooling plate group 31, the second liquid cooling pipe 3312 is connected to the inlet of the second liquid cooling plate group 32; the third liquid cooling pipe 3321 is connected to the outlet of the second liquid cooling plate group 32, and the fourth liquid cooling pipe 3322 is connected to the outlet of the first liquid cooling plate group 31.

[0069] It should be noted that the first liquid cooling pipe 3311 and the second liquid cooling pipe 3312 of the liquid inlet branch assembly 331 are detachably connected and can be connected via flanges or connectors. The first liquid cooling pipe 3311 is connected to the inlet of the first liquid cooling plate group 31, and the second liquid cooling pipe 3312 is connected to the inlet of the second liquid cooling plate group 32. Similarly, the third liquid cooling pipe 3321 and the fourth liquid cooling pipe 3322 of the liquid return branch assembly 332 are also detachably connected. The third liquid cooling pipe 3321 is connected to the outlet of the second liquid cooling plate group 32, and the fourth liquid cooling pipe 3322 is connected to the outlet of the first liquid cooling plate group 31. This structure solves the problem that the integral molding of the liquid cooling pipe assembly 33 is difficult to adapt to different installation spaces. By designing the liquid inlet and liquid return pipes in segments and combining them into a complete flow channel through detachable connections, the flexibility of the pipe layout is enhanced, making it easier to adjust the pipe routing according to the internal space of the battery pack and reducing the assembly difficulty.

[0070] Please see Figure 1-3 As an optional embodiment of the present invention, the first liquid cooling plate assembly 31 includes a first inlet pipe 311, a first outlet pipe 312 and at least three first liquid cooling plate components 313;

[0071] One of the first liquid cooling plates 313 has an inlet connected to the first liquid cooling pipe 3311 and an outlet connected to the first inlet pipe 311. Another first liquid cooling plate 313 has an inlet connected to the first outlet pipe 312 and an outlet connected to the fourth liquid cooling pipe 3322. The remaining first liquid cooling plates 313 have one end connected to the first inlet pipe 311 and the other end connected to the first outlet pipe 312.

[0072] It should be noted that at least three first liquid cooling plates 313 of the first liquid cooling plate group 31 form a combined flow channel through the first inlet pipe 311 and the first outlet pipe 312. One liquid cooling plate (first liquid cooling plate 313) directly receives the coolant from the first liquid cooling pipe 3311 and introduces it into the first inlet pipe 311. Another liquid cooling plate (first liquid cooling plate 313) obtains coolant from the first outlet pipe 312 and leads it to the fourth liquid cooling pipe 3322. The remaining liquid cooling plates (first liquid cooling plates 313) are connected to the inlet pipe and the outlet pipe at both ends, forming a parallel flow distribution structure. This design solves the problem of uneven heat dissipation in the large-volume installation area. By using the inlet pipe and the outlet pipe, the coolant is centrally distributed and collected, enabling multiple liquid cooling plates (first liquid cooling plates 313) to dissipate heat collaboratively, thereby improving the heat dissipation uniformity of the first installation area 11 and meeting the heat dissipation requirements of a large number of battery cell modules 2.

[0073] Please see Figure 1-3 As an optional embodiment of the present utility model, the second liquid cooling plate assembly 32 includes a second inlet pipe 321, a transfer pipe 322, a second outlet pipe 323 and a plurality of second liquid cooling plate components 324;

[0074] The second liquid cooling pipe 3312 is connected to the second inlet pipe 321, and the third liquid cooling pipe 3321 is connected to the second outlet pipe 323; the inlet of a portion of the second liquid cooling plate 324 is connected to the second inlet pipe 321, and the outlet of this portion of the second liquid cooling plate 324 is connected to the inlet of another portion of the second liquid cooling plate 324 through the adapter pipe 322, and the outlet of this other portion of the second liquid cooling plate 324 is connected to the second outlet pipe 323.

[0075] It should be noted that the multiple second liquid-cooled plates 324 of the second liquid-cooled plate assembly 32 form a combined flow channel through the second inlet pipe 321, the transfer pipe 322, and the second outlet pipe 323. Some liquid-cooled plates (second liquid-cooled plates 324) obtain coolant from the second inlet pipe 321 and are then transported to another part of the liquid-cooled plates (second liquid-cooled plates 324) through the transfer pipe 322. Finally, the coolant is collected by the second outlet pipe 323 and flows into the third liquid-cooled pipe 3321, forming a partially series structure. This design solves the problem of difficult arrangement of liquid-cooled plates (second liquid-cooled plates 324) in a narrow installation area. By using the transfer pipe 322 to achieve the diversion and transportation of coolant, the liquid-cooled plates (second liquid-cooled plates 324) can be arranged in segments along the length of the installation area, thereby achieving effective flow of coolant within a limited space and ensuring the heat dissipation efficiency of the second installation area 13.

[0076] Please see Figure 1-3As an optional embodiment of this utility model, the first liquid cooling pipe 3311 and the second liquid cooling pipe 3312, and the third liquid cooling pipe 3321 and the fourth liquid cooling pipe 3322 are all detachably connected by quick-connect couplings 3323.

[0077] It should be noted that the first liquid cooling pipe 3311 and the second liquid cooling pipe 3312, and the third liquid cooling pipe 3321 and the fourth liquid cooling pipe 3322 are connected by quick-connect couplings 3323. The quick-connect couplings 3323 can adopt a ball valve type or a claw-lock type structure, combining quick connection and sealing functions. This design solves the problem of low assembly and disassembly efficiency of the liquid cooling pipe assembly 33. By utilizing the standardized interface of the quick-connect couplings 3323, rapid connection and disconnection of the pipes are achieved, resulting in shorter assembly and maintenance time and improved operational convenience.

[0078] As an optional embodiment of the present invention, the battery pack further includes an aluminum busbar disposed inside it, the aluminum busbar contacting the battery cell or the lower housing 1 for heat dissipation.

[0079] It should be noted that the internal aluminum busbar can be flat or irregularly shaped. When the aluminum busbar contacts the battery cell, thermal conductive adhesive can be used to enhance heat conduction. When it contacts the lower housing 1, it can be directly attached or fixed by a bracket. This design solves the problem of insufficient local heat dissipation of the battery cell. By utilizing the high thermal conductivity of the aluminum busbar, the heat from the battery cell is conducted to the lower housing 1 or other heat dissipation areas, forming an auxiliary heat dissipation path. This improves the temperature uniformity inside the battery pack and prevents the battery cell from affecting performance due to local overheating.

[0080] As an optional embodiment of this utility model, the bottom inner side of the lower housing 1 is provided with a strip groove 101 and a partition plate 102 for limiting the battery module 2.

[0081] It should be noted that the strip-shaped groove 101 on the inner side of the bottom of the lower housing 1 can be used to reduce weight, accommodate wiring harnesses, enhance structural strength, and facilitate airflow within the battery pack. The groove cross-section can be designed as rectangular or trapezoidal. The partition plate 102 that limits the battery module 2 can be made of metal plate or high-strength plastic plate and is spaced apart along the arrangement direction of the cell module 2. This design solves the problem of the cell module 2 easily shaking during vehicle operation. The physical obstruction of the partition plate 102 restricts the displacement of the module, while the strip-shaped groove 101 optimizes the structural performance of the lower housing 1, thereby improving the installation stability of the cell module 2 and enhancing the mechanical strength of the lower housing 1.

[0082] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A partitioned battery pack, characterized in that, include: The lower housing has a first mounting area, a clearance area, and a second mounting area formed sequentially on it; both the first and second mounting areas are used to install battery cell modules, and the clearance area is used to avoid vehicle structures and install electrical components. The liquid cooling assembly includes a first liquid cooling plate group disposed in the first mounting area, a second liquid cooling plate group disposed in the second mounting area, and a liquid cooling pipe assembly connecting the first liquid cooling plate group and the second liquid cooling plate group. The first liquid cooling plate group and the second liquid cooling plate group are detachably connected through the liquid cooling pipe assembly.

2. The partitioned battery pack according to claim 1, characterized in that, The volume of the first installation area is different from that of the second installation area. The liquid cooling pipe assembly is provided with a flow limiting structure to regulate the flow rate of the coolant flowing through the first liquid cooling plate group and the second liquid cooling plate group.

3. The partitioned battery pack according to claim 2, characterized in that, The flow-limiting structure is one or more of the following: a throttling orifice and a variable diameter pipe section.

4. The partitioned battery pack according to claim 1, characterized in that, Both the first liquid cooling plate assembly and the second liquid cooling plate assembly include liquid cooling plate components. An elastic heat insulation pad is provided between the liquid cooling plate component and the bottom surface of the lower housing. The total thickness of the elastic heat insulation pad and the liquid cooling plate component is higher than the height of the support surface of the lower housing for the battery cell module.

5. The partitioned battery pack according to claim 1, characterized in that, Both the first liquid cooling plate group and the second liquid cooling plate group include liquid cooling plate components, which are flat and have multiple parallel flow channels inside.

6. The partitioned battery pack according to claim 5, characterized in that, The first liquid cooling plate assembly includes a plurality of the liquid cooling plates, at least some of which are fluidly connected in parallel.

7. The partitioned battery pack according to claim 5, characterized in that, The second liquid cooling plate assembly includes a plurality of the liquid cooling plates, at least some of which are fluidly connected in series.

8. The partitioned battery pack according to claim 1, characterized in that, The length direction of the first liquid cooling plate group is consistent with the length direction of the cell module in the first mounting area, and the length direction of the second liquid cooling plate group is consistent with the length direction of the cell module in the second mounting area.

9. The partitioned battery pack according to claim 1, characterized in that, The liquid cooling pipe assembly includes: The liquid inlet branch assembly has a main inlet and two branch outlets that are detachably connected to the inlet of the first liquid cooling plate assembly and the inlet of the second liquid cooling plate assembly, respectively; The return liquid branch assembly has two branch inlets that are detachably connected to the outlets of the first liquid cooling plate group and the second liquid cooling plate group, respectively, and a main outlet.

10. The partitioned battery pack according to claim 1, characterized in that, The avoidance zone is an inwardly recessed gap or passage.

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