Liquid-cooled battery module

Abstract

The liquid-cooled battery module comprises a shell and a battery cell group, the shell comprises a bottom plate, a cover plate and a panel, the cover plate and the panel are detachably installed on the bottom plate, the cover plate is provided with a plane plate parallel to the bottom plate, a first side wall and a second side wall, the first side wall and the second side wall are perpendicular to the bottom plate, and the bottom plate, the cover plate and the panel form a space capable of containing the battery cell group; the bottom plate is provided with a liquid cooling flow channel. Compared with an existing air cooling mode, the liquid cooling channel is formed in the bottom plate of the liquid cooling battery module, the flow generated by the battery can be taken away through the cooling liquid in the liquid cooling channel in the using process, and the protection grade of the whole liquid cooling battery module can be improved while the heat dissipation problem of the battery is solved.

Description

Technical Field

[0001] This utility model relates to a liquid-cooled battery module, belonging to the field of new energy batteries. Background Technology

[0002] A battery module consists of a housing and a battery pack installed inside the housing. The battery pack generates significant heat during use, requiring effective heat dissipation to maintain its normal operation. Existing battery pack cooling methods generally employ air cooling, with a typical design featuring symmetrical, straight airflow channels on both sides of the housing. This design, due to its uneven cross-section, often leads to a decrease in the overall protective performance of the battery module. Furthermore, the straight airflow channels tend to become heavily contaminated after a period of use due to dust carried during air exchange. Additionally, air itself has insufficient specific heat capacity, limiting its heat dissipation performance. Based on these shortcomings of existing air-cooled cooling structures, there is a need to develop a more efficient, stronger, and cleaner cooling system to meet the application requirements of battery modules. Utility Model Content

[0003] The purpose of this invention is to provide a liquid-cooled battery module to solve the above-mentioned technical problems.

[0004] The technical solution to achieve the purpose of this utility model is: a liquid-cooled battery module, including a housing and a battery cell assembly. The housing includes a bottom plate and a cover plate and a panel that are detachably mounted on the bottom plate. The cover plate has a flat plate parallel to the bottom plate and a first side wall and a second side wall perpendicular to the bottom plate. The bottom plate, the cover plate, and the panel form a space that can accommodate the battery cell assembly. The bottom plate is provided with a liquid cooling channel.

[0005] The liquid-cooled battery module of this application has a liquid cooling channel on its base plate. Compared with the existing air-cooling mode, the flow generated by the battery can be carried away by the coolant in the liquid cooling channel during use. This solves the battery heat dissipation problem and improves the protection level of the entire liquid-cooled battery module.

[0006] Further or optional, the base plate is provided with a liquid cooling channel, a liquid cooling inlet and a liquid cooling outlet, and a structural adhesive is provided between the base plate and the cell assembly. The structural adhesive can fix the cell assembly and the base plate on the one hand, and enhance the heat exchange between the cell assembly and the base plate on the other hand, thereby improving the heat exchange efficiency between the battery modules.

[0007] Further or optional, in order to improve the strength of the base plate, the base plate is made of stamped and brazed aluminum, and is provided with reinforcing ribs around it.

[0008] Further or optional, in order to effectively fix the battery cell assembly, the base plate is provided with protruding ridges on both sides near the panel, and the battery cell assembly is fixed to the protruding ridges by bolts; the base plate is provided with adhesive strips on both sides near the first side wall and the second side wall.

[0009] Further or optional, in order to flexibly adjust the capacity of the battery cell group, prevent the secondary battery cell group from scattering, and facilitate the assembly of the secondary battery cell group, the battery cell group is composed of multiple secondary battery cell groups. Each of the two ends of the secondary battery cell group is provided with an insulating pad and an end plate. A connecting plate is provided between the two end plates along the surface of the secondary battery cell group to connect the two end plates. A fixing steel strip is also provided around the two end plates and the secondary battery cell group and the end plates. The end plates, the connecting plate and the fixing steel strip form a space suitable for installing the secondary battery cell group.

[0010] Further or optionally, in order to improve the safety performance of the liquid-cooled battery module, a fireproof and insulating protective cover is provided between the secondary cell assembly and the flat plate of the cover plate, and an IP67 protection level foam strip is provided between the secondary cell assembly and the first and second side walls of the cover plate.

[0011] Further or optionally, to facilitate control of the liquid-cooled battery module, the panel includes a first front panel and a second front panel with external ports.

[0012] Further or optional, in order to facilitate the transfer of heavier liquid-cooled battery modules, a hanging lug is also provided at the connection between the base plate and the cover plate.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects:

[0014] (1) The liquid-cooled battery module of this application has a liquid cooling channel on its base plate. Compared with the existing air-cooling mode, the flow generated by the battery can be carried away by the coolant in the liquid cooling channel during use. This solves the problem of battery heat dissipation and improves the protection level of the entire liquid-cooled battery module.

[0015] (2) Structural adhesive is provided between the base plate and the battery cell assembly in this application, which can fix the battery cell assembly and the base plate, while improving the heat exchange efficiency between the battery cell assembly and the base plate.

[0016] (3) The base plate of this application is made of stamped and brazed aluminum, and is surrounded by reinforcing ribs, which makes it stronger than the air-cooled structure.

[0017] (4) The base plate of this application is provided with a raised ridge for auxiliary fixing screws and a strip for anti-overflow glue, which is beneficial for further fixing of the battery cell assembly.

[0018] (5) The secondary battery pack of this application is provided with end plates at both ends and a connecting plate on the upper side, and a fixing steel strip is provided between the end plates. Its structure is more stable and less likely to fall apart during assembly and use, and its stability is better.

[0019] (6) The cover plate of the liquid-cooled battery module of this application is provided with a fireproof and insulating protective cover between the flat plates, and the outer side of the battery cell assembly is provided with foam adhesive strips, which has a higher safety level.

[0020] (7) The panel at one end of the liquid-cooled battery module of this application is also provided with a first front panel and a second front panel for external ports, which provides better expansion flexibility.

[0021] (8) The bottom plate and the cover plate of the liquid-cooled battery module of this application are also provided with a hanging lug, which is beneficial for transporting heavy liquid-cooled battery modules. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0023] Figure 1 This is a top view of the present invention with the casing attached;

[0024] Figure 2 This is a rear view of the present invention;

[0025] Figure 3 This is a side view of the present invention without its casing. Figure 1 ;

[0026] Figure 4 This is a side view of the present invention without its casing. Figure 2 ;

[0027] Figure 5 This is a top view of the present invention without its casing.

[0028] Figure 6 This is a front view of the present invention without the casing.

[0029] Figure 7 This is a schematic diagram of the base plate of this utility model;

[0030] Figure 8 This is a schematic diagram of the secondary battery cell assembly structure of this utility model.

[0031] The labels in the attached diagram are:

[0032] 1. Housing, 11. Base plate, 111. Liquid cooling channel, 112. Liquid cooling inlet, 113. Protruding ridge, 114. Cover plate, 121. Flat plate, 122. First side wall, 123. Second side wall, 13. Front panel, 131. Second front panel, 132. Cell assembly, 2. Secondary cell assembly, 21. End plate, 22. Connecting plate, 23. Fixing steel strip, 24. Foam strip, 3. Detailed Implementation

[0033] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0034] 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, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this utility model and should not be used to limit the scope of protection of this utility model.

[0039] (Example 1)

[0040] See Figure 1 This embodiment of a liquid-cooled battery module includes a housing 1 and a cell assembly 2. The cell assembly 2 includes four secondary cell assemblies 21. The housing 1 includes a base plate 11 and a cover plate 12 and a panel 13 detachably mounted on the base plate. The cover plate 12 has a flat plate 121 parallel to the base plate 11 and a first side wall 122 and a second side wall 123 perpendicular to the base plate. The base plate 11, cover plate 12, and panel 13 form a space for accommodating the cell assembly 2. The base plate 11 is a liquid-cooled plate with a liquid-cooled flow channel 111, a liquid-cooled inlet 112, and a liquid-cooled outlet 113. Adhesive strips are provided on both sides of the base plate 11. Structural adhesive is provided between the base plate 11 and the cell assembly 2. This structural adhesive is provided between the base plate 11 and the cell assembly 2 to fix the two together and to conduct heat between them, thereby accelerating the heat dissipation speed of the liquid-cooled plate 11.

[0041] To facilitate the installation of external electrical components on the liquid-cooled battery module, the panel 13 includes a first front panel 131 and a second front panel 132 with external ports. Electrical interfaces and control buttons are provided on the first front panel 131 and the second front panel 132.

[0042] In the above structure, the base plate 11, the cover plate 12 and the battery cell group 2 are all cuboid structures with long sides on the left and right sides and short sides on the front and back sides. The four secondary battery cell groups 21 are arranged with gaps along the left and right directions.

[0043] To improve the structural strength of the base plate, the base plate 11 is made of stamped and brazed aluminum.

[0044] The secondary cell group 21 is a power supply unit that can be connected in series. The cell group 2 is composed of multiple secondary cell groups 21. Each of the two ends of the secondary cell group 21 is provided with an end plate 22. A connecting plate 23 is provided between the two end plates 22 along the surface of the secondary cell group 21 to connect the two end plates 22. A fixing steel strip 24 is also provided around the two end plates 22 and surrounds the secondary cell group 21 and the end plates 22. The connecting plate 23 and the fixing steel strip 24 form a space suitable for installing the secondary cell group 21.

[0045] To reduce the risk of explosion caused by welding heat during the welding process, the fixing steel strip 24 can be designed as an integral piece, which can be directly fastened to both sides of the end plate 22 during use.

[0046] The base plate 11 has protruding ribs 114 on both sides near the panel, and the battery cell assembly 2 is fixed to the protruding ribs 114 by bolts; the base plate 11 has rubber-blocking strips on both sides near the first side wall 122 and the second side wall 123.

[0047] When in use, coolant is injected from the liquid cooling inlet 112 and output from the liquid cooling outlet 113. Here, the liquid cooling inlet 112 and the liquid cooling outlet 113 are located on the same short section of the cell assembly and are both located on one side of the panel 13. During the wiring process, the liquid cooling inlet and outlet pipes and electrical lines enter and exit from the same position. No pre-reservation is required when installing the liquid-cooled battery module.

[0048] When liquid cooling is required at both ends, the liquid cooling inlet 112 and the liquid cooling outlet 113 can be set at both ends of the liquid-cooled battery module. The specific installation situation depends on the actual installation situation.

[0049] To improve the battery's protection performance, a fireproof and insulating protective cover (not shown) is provided between the secondary cell assembly 21 and the flat plate 121 of the cover plate 12. To reduce the weight of the liquid-cooled battery module, the insulating protective cover is made of glass fiber composite material or aramid fiber, and the specific material is selected according to electrical performance, strength and cost.

[0050] An IP67-rated foam strip 3 is provided between the secondary cell assembly 21 and the first side wall 122 and the second side wall 123 of the cover plate 12.

[0051] To facilitate fixing the liquid-cooled battery module and moving its position as needed, a hanging lug is provided at the connection between the base plate 11 and the cover plate 12.

[0052] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid-cooled battery module, characterized in that: The device includes a housing (1) and a battery cell assembly (2). The housing (1) includes a base plate (11) and a cover plate (12) and a panel (13) that are detachably mounted on the base plate. The cover plate (12) has a flat plate (121) parallel to the base plate (11) and a first side wall (122) and a second side wall (123) perpendicular to the base plate. The base plate (11), cover plate (12), and panel (13) form a space that can accommodate the battery cell assembly (2). The base plate (11) is provided with a liquid cooling channel (111).

2. The liquid-cooled battery module according to claim 1, characterized in that: The base plate (11) is provided with a liquid cooling channel (111), a liquid cooling inlet (112) and a liquid cooling outlet (113), and structural adhesive is provided between the base plate (11) and the battery cell assembly (2).

3. A liquid-cooled battery module according to claim 2, characterized in that: The base plate (11) is made of stamped and brazed aluminum and is surrounded by reinforcing ribs.

4. A liquid-cooled battery module according to claim 1, characterized in that: The base plate (11) has protruding ribs (114) on both sides near the panel, and the battery cell assembly (2) is fixed to the protruding ribs (114) by bolts; the base plate (11) has rubber strips on both sides near the first side wall (122) and the second side wall (123).

5. A liquid-cooled battery module according to claim 1, characterized in that: The battery cell assembly (2) is composed of multiple secondary battery cell assemblies (21). Each of the two ends of the secondary battery cell assembly (21) is provided with an end plate (22). A connecting plate (23) connecting the two end plates (22) is provided along the surface of the secondary battery cell assembly (21) between the two end plates (22). A fixing steel strip (24) is also provided around the secondary battery cell assembly (21) and the end plates (22) outside the two end plates (22). The end plates (22), the connecting plate (23) and the fixing steel strip (24) form a space suitable for installing the secondary battery cell assembly (21).

6. A liquid-cooled battery module according to claim 5, characterized in that: A fireproof and insulating protective cover is provided between the secondary battery cell group (21) and the flat plate (121) of the cover plate (12), and a foam strip (3) with an IP67 protection rating is provided between the secondary battery cell group (21) and the first side wall (122) and the second side wall (123) of the cover plate (12).

7. A liquid-cooled battery module according to claim 1, characterized in that: The panel (13) includes a first front panel (131) and a second front panel (132) having external ports.

8. A liquid-cooled battery module according to claim 1, characterized in that: The bottom plate (11) and the cover plate (12) are also provided with a hanging lug.

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