Battery assembly structure

Abstract

The utility model belongs to the technical field of power batteries, and provides a battery assembly structure which comprises a battery module, a liquid cooling plate and a box body, the plurality of battery modules are mounted in the box body to form a first-layer battery structure, the liquid cooling plate is laid on the surface of the first-layer battery structure, and finally, the plurality of battery modules are mounted on the surface of the liquid cooling plate to form a second-layer battery structure. The liquid cooling plates are located among the multiple layers of battery modules, the requirement for simultaneous heat dissipation of the upper and lower layers of battery modules is met, the transverse size of the battery pack is not affected by the design, and meanwhile the requirement for the electric quantity of the battery pack is increased; in addition, a new battery module can be used for replacing the battery module when the battery module fails, and the box body can be continuously used, so that the maintenance cost is greatly reduced; according to the utility model, the foam and the limiting strips are used, the foam can generate certain deformation after being pressed by the battery module, and the limiting strips can limit the battery module to further extrude the foam, so that the foam is prevented from losing elasticity due to excessive extrusion.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, and specifically relates to a battery assembly structure. Background Technology

[0002] In the development of the automotive industry, major automakers continue to launch new models, leading to a growing demand for battery pack capacity. However, the external dimensions of battery packs are largely fixed due to various constraints. To meet the demand for larger capacities, current methods primarily increase the number of battery cells. It is worth noting, however, that a lack of proper planning when stacking modules within the battery pack can negatively impact battery pack safety, thereby jeopardizing the safety of the entire vehicle.

[0003] Therefore, designing a CTP (Cell To Pack) multi-layer module assembly structure for battery packs is crucial. This innovative structural design aims to improve battery pack safety by optimizing cell integration and module assembly layout, providing a solid guarantee for the safe operation of the entire vehicle and adapting to the ever-evolving needs of the automotive industry. Utility Model Content

[0004] To address the problems in the background art, this utility model proposes a battery assembly structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A battery assembly structure includes a battery module, a liquid cooling plate, and a housing;

[0007] Several of the battery modules are installed in the housing to form a first battery structure;

[0008] The liquid cooling plate is laid on the surface of the first layer of battery structure;

[0009] Several of the battery modules are mounted on the surface of the liquid cooling plate to form a second battery structure.

[0010] Preferably, the battery module has a rectangular structure.

[0011] Preferably, a plurality of parallel crossbeams are installed at the bottom of the box, the crossbeams being used to divide the space at the bottom of the box and form a plurality of mounting positions;

[0012] The battery module in the first layer of the battery structure is installed at the mounting position.

[0013] Preferably, a plurality of parallel module beams are mounted on the surface of the liquid cooling plate, and the battery modules in the second layer battery structure are mounted between adjacent module beams.

[0014] Preferably, the liquid cooling plate is connected to the module beam by screws or welding;

[0015] When connected by screws:

[0016] The surface of the liquid cooling plate is provided with several sets of first through holes;

[0017] Several sets of second through holes are opened on one surface of the module beam;

[0018] When installing the module beam, the first through hole and the second through hole are connected by screws.

[0019] Preferably, the liquid cooling plate has a cooling water channel inside; the inlet of the cooling water channel is connected to a water inlet nozzle, and the outlet is connected to a water outlet nozzle, both of which are located at one end of the liquid cooling plate.

[0020] Preferably, the end of the module beam is provided with a plurality of evenly distributed weight-reduction holes;

[0021] The weight-reducing hole extends through the module beam.

[0022] Preferably, a number of foam pads are placed at the bottom of the housing corresponding to each battery module of the first layer battery structure;

[0023] The battery module of the first layer battery structure is placed on the corresponding foam.

[0024] Preferably, a limiting strip is installed around the periphery of the foam, and the thickness of the limiting strip is lower than the initial thickness of the foam.

[0025] Preferably, the battery module is bonded to the liquid cooling plate using thermally conductive structural adhesive.

[0026] The beneficial effects of this utility model are:

[0027] 1. This utility model is composed of battery modules, liquid cooling plates, module beams, etc., wherein the liquid cooling plates are located between the multi-layer battery modules to achieve heat dissipation requirements from both the top and bottom. This design does not affect the lateral dimensions of the battery pack, but increases the battery pack's power requirements. In addition, if a module fails, it can be replaced with a new module, and the housing can continue to be used, greatly reducing maintenance costs.

[0028] 2. This utility model uses foam and limiting strips. When the foam is subjected to pressure from the battery module, it will deform to a certain extent. The limiting strips can restrict the battery module from further squeezing the foam, which can not only enhance the cushioning effect, but also fill the gap between the battery module and the bottom of the box to a certain extent, and prevent the foam from being squeezed too much and losing its elasticity.

[0029] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of a battery assembly structure according to this utility model is shown;

[0032] Figure 2 A schematic diagram of the battery module of this utility model is shown;

[0033] Figure 3 A schematic diagram of the assembly of the liquid cooling plate and the module beam of this utility model is shown.

[0034] Figure 4 A schematic diagram of the structure of the liquid cooling plate of this utility model is shown;

[0035] Figure 5 A schematic diagram of the modular beam structure of this utility model is shown;

[0036] Figure 6 A schematic diagram of the assembly of the foam and the limiting strip of this utility model is shown;

[0037] Figure 7 A schematic diagram of the internal structure of the box of this utility model is shown.

[0038] In the diagram: 1. Battery module; 2. Liquid cooling plate; 201. Water inlet; 202. Water outlet; 203. First through hole; 3. Module beam; 301. Second through hole; 302. Weight reduction hole; 4. Housing; 401. Crossbeam; 5. Foam; 6. Limiting strip. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] A battery assembly structure, such as Figure 1 As shown, the structure includes a battery module 1 (CTP battery), a liquid cooling plate 2, and a housing 4. Two battery modules 1 are installed in the housing 4 to form the first battery layer structure. The liquid cooling plate 2 is then laid flat on the surface of the first battery layer structure to achieve efficient heat dissipation for the battery modules 1. Next, two more battery modules 1 are installed on the surface of the liquid cooling plate 2 to form the second battery layer structure.

[0041] It should be noted that the above structure, by layering the battery modules 1 within the housing 4, makes full use of the space in the housing 4, allowing for the arrangement of more battery modules 1 within a limited space. This increases the energy density of the battery system, thereby improving the overall range or power supply duration of the battery system. For example, in electric vehicles, this can extend the vehicle's driving range, and in energy storage systems, it can provide longer-lasting power support for electrical devices. Furthermore, the liquid cooling plate 2, laid between the two layers of battery modules 1, can directly contact the battery modules 1, effectively dissipating the heat generated during charging and discharging, preventing overheating, ensuring the battery modules 1 operate within a suitable temperature range, contributing to improved battery performance, extended battery life, and enhanced battery system safety.

[0042] It should be further explained that the battery module 1 and the liquid cooling plate 2 are bonded together with thermally conductive structural adhesive, which can not only improve heat dissipation efficiency, but also improve the stability of the battery module 1 and the liquid cooling plate 2.

[0043] As an alternative, such as Figure 7 As shown, several parallel crossbeams 401 are installed at the bottom of the housing 4. These crossbeams 401 divide the space at the bottom of the housing 4, thus forming several mounting positions. The battery module 1 in the first-layer battery structure is installed on these mounting positions. Furthermore, several parallel module beams 3 are installed on the surface of the liquid cooling plate 2, and the battery module 1 in the second-layer battery structure is installed between adjacent module beams 3.

[0044] It should be noted that, from the perspective of installation stability, the mounting positions formed by the crossbeams 401 at the bottom of the housing 4 provide a stable support foundation for the battery modules 1 in the first-layer battery structure. The parallel arrangement of the crossbeams 401 also enhances the overall structural stability and reduces the risk of module swaying. In terms of space utilization, the mounting positions separated by the crossbeams 401 achieve efficient use of the space at the bottom of the housing 4, making the layout of the battery modules 1 more compact and reasonable. The module beams 3 on the surface of the liquid cooling plate 2 not only provide installation positioning for the battery modules 1 in the second-layer battery structure, but also effectively utilize the space between adjacent module beams 3. The module beams 3 and the crossbeams 401 work together to make the layered structure of the entire battery system clear, and the battery modules 1 in each layer are installed in an orderly manner, which is conducive to subsequent maintenance and management, and allows staff to quickly locate and handle problems with individual battery modules 1.

[0045] like Figure 2 As shown, the battery module 1 has a rectangular structure. The rectangular battery module 1 can be arranged closely together, making full use of the space within the housing 4 and reducing space waste.

[0046] like Figure 3 As shown, there is a connection between the liquid cooling plate 2 and the module beam 3, and the connection method can be screw connection or welding.

[0047] In addition, Figure 3 In this design, the core heat dissipation structure of the liquid cooling plate 2 is its internal cooling water channel (not shown in the figure). As the key pathway for the entire liquid cooling cycle, the cooling water channel handles the coolant input at one end, which is closely connected to the inlet nozzle 201; the other end is responsible for outputting the coolant after heat absorption, connected to the outlet nozzle 202. It is particularly noteworthy that the inlet nozzle 201 and the outlet nozzle 202 are located at the same end of the liquid cooling plate 2. This layout design optimizes the coolant circulation path to a certain extent and facilitates the centralized connection and arrangement of external cooling pipes.

[0048] When choosing screw connection:

[0049] like Figure 4 As shown, several sets of first through holes 203 are formed on the surface of the liquid cooling plate 2; in addition, combined with Figure 5 It can be seen that one surface of the modular beam 3 is provided with several sets of second through holes 301. When installing the modular beam 3, the first through hole 203 and the second through hole 301 are precisely aligned, and then the two are fastened together with screws.

[0050] In addition, through Figure 4 It can be seen that the module beam 3 is a rectangular plate with several evenly distributed weight-reducing holes 302 at its ends. The weight-reducing holes 302 pass through the module beam 3 and are square holes.

[0051] As a preferred embodiment, several foam units 5 are placed at the bottom of the housing 4 corresponding to each battery module 1 of the first-layer battery structure. The battery modules 1 of the first-layer battery structure are placed on the corresponding foam units 5. For example... Figure 6 Limiting strips 6 are installed around the perimeter of foam 5, and the thickness of limiting strips 6 is lower than the initial thickness of foam 5.

[0052] It should be noted that at the bottom of the housing 4, several foam units 5 are placed for each battery module 1 in the first layer of the battery structure. Specifically, the battery modules 1 of the first layer of the battery structure are precisely positioned on the corresponding foam units 5. Figure 6 As can be seen, the thickness of the limiting strip 6 is lower than the initial thickness of the foam 5. This structural design plays several important roles. First, the foam 5 has good cushioning performance, which can effectively reduce the impact force on the battery module 1 caused by vibration and bumps during vehicle operation, preventing damage to the internal structure of the battery module 1 due to frequent vibration and extending the service life of the battery module 1. Second, although the height of the limiting strip 6 is lower than the initial height of the foam 5, it can still position the battery module 1, preventing the battery module 1 from shifting within the housing 4, ensuring the stability of the battery module 1 during operation, and maintaining the integrity of the entire battery system structure. At the same time, the foam 5 will deform to a certain extent after being subjected to pressure from the battery module 1. At this time, the limiting strip 6 can limit the battery module 1 from further compressing the foam 5, which can not only enhance the cushioning effect, but also fill the gap between the battery module 1 and the bottom of the housing 4 to a certain extent, preventing the foam 5 from being over-compressed and losing its elasticity, and ensuring the stable operation of the battery system under different operating conditions.

[0053] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery assembly structure, characterized in that, Includes battery module (1), liquid cooling plate (2) and housing (4); Several of the battery modules (1) are installed in the housing (4) to form a first layer of battery structure; The liquid cooling plate (2) is laid on the surface of the first layer of battery structure; Several of the battery modules (1) are mounted on the surface of the liquid cooling plate (2) to form a second battery structure.

2. The battery assembly structure according to claim 1, characterized in that, The battery module (1) has a rectangular structure.

3. The battery assembly structure according to claim 1, characterized in that, The bottom of the box (4) is equipped with several parallel crossbeams (401), which are used to separate the bottom space of the box (4) and form several installation positions. The battery module (1) in the first layer battery structure is installed at the mounting position.

4. The battery assembly structure according to claim 1, characterized in that, The surface of the liquid cooling plate (2) is equipped with several parallel module beams (3), and the battery modules (1) in the second layer battery structure are installed between adjacent module beams (3).

5. A battery assembly structure according to claim 4, characterized in that, The liquid cooling plate (2) is connected to the module beam (3) by screws or welding; When connected by screws: The surface of the liquid cooling plate (2) is provided with a number of first through holes (203); The module beam (3) has several sets of second through holes (301) on one surface; When installing the module beam (3), the first through hole (203) and the second through hole (301) are connected by screws.

6. The battery assembly structure according to claim 1, characterized in that, The liquid cooling plate (2) is provided with a cooling water channel inside; the inlet of the cooling water channel is connected to a water inlet (201), and the outlet is connected to a water outlet (202). The water inlet (201) and the water outlet (202) are both located at one end of the liquid cooling plate (2).

7. A battery assembly structure according to claim 4, characterized in that, The end of the module beam (3) is provided with several evenly distributed weight-reducing holes (302). The weight reduction hole (302) passes through the module beam (3).

8. A battery assembly structure according to any one of claims 1-7, characterized in that, The bottom of the box (4) is provided with several foams (5) corresponding to each battery module (1) of the first layer battery structure; The battery module (1) of the first layer battery structure is placed on the corresponding foam (5).

9. A battery assembly structure according to claim 8, characterized in that, A limiting strip (6) is installed around the foam (5), and the thickness of the limiting strip (6) is lower than the initial thickness of the foam (5).

10. A battery assembly structure according to any one of claims 1-9, characterized in that, The battery module (1) and the liquid cooling plate (2) are bonded together by thermally conductive structural adhesive.

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