A battery module, a battery pack and an electric device

Abstract

This utility model belongs to the field of battery technology and discloses a battery module, a battery pack, and an electrical device. The battery module includes a liquid cooling plate, a module frame, and a cell module. The module frame is fixedly connected to the liquid cooling plate and together with the liquid cooling plate forms a receiving cavity. The cell module is fixedly disposed in the receiving cavity and supported on the liquid cooling plate. The battery module provided by this utility model fixes the liquid cooling plate and the module frame as one unit. The liquid cooling plate acts as the bottom tray of the module frame. After the cell module is placed in the receiving cavity, the liquid cooling plate supports the cell module and dissipates heat from it. After the cell module is fixed in the receiving cavity, the liquid cooling plate, the cell module, and the module frame are integrated into one unit and then packaged as a whole. This saves materials, simplifies the production process, increases the strength of the battery module, and avoids deformation and other defects during production and handling.

Description

Technical Field

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

[0002] With increasing environmental awareness, replacing fossil fuel-powered vehicles with electric vehicles to achieve zero emissions and zero pollution has become one of the future development trends for electric vehicles. Among these, the battery pack is the core power source of electric vehicles, playing an irreplaceable and crucial role.

[0003] In existing technologies, to ensure that batteries can charge and discharge at suitable temperatures, liquid cooling plates are used within the battery pack to cool the battery modules. Traditional battery packs typically integrate the liquid cooling plate directly into the housing or bolt it to the housing, and then place the battery modules on top of the liquid cooling plate for cooling. While this design is simple to install and operate, the lack of direct connection between the liquid cooling plate and the battery modules results in low rigidity of the battery modules, making them susceptible to breakage and damage under vibration. Furthermore, due to their insufficient strength, the battery modules are prone to deformation during welding and handling.

[0004] Therefore, there is an urgent need to provide a battery module, battery pack, and electrical equipment to solve the above problems. Utility Model Content

[0005] The first objective of this invention is to provide a battery module that integrates the liquid cooling plate and the cell module into a single unit via a module frame, thereby simplifying the manufacturing process and improving the strength of the battery module.

[0006] The second objective of this invention is to provide a battery pack that simplifies the manufacturing process and improves the strength of the battery module by setting up the aforementioned battery module.

[0007] The third objective of this utility model is to provide an electrical device that, by setting the aforementioned battery pack, simplifies the production process and improves the strength of the battery module.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] A battery module includes a liquid cooling plate, a module frame, and a battery cell module. The module frame is fixedly connected to the liquid cooling plate and together with the liquid cooling plate form a receiving cavity. The battery cell module is fixedly disposed in the receiving cavity and supported on the liquid cooling plate.

[0010] As an optional solution, the module frame includes a side plate and a bottom plate. The side plate has an annular structure and surrounds the liquid cooling plate to form the receiving cavity. The bottom plate is connected to the bottom end of the side plate and extends outward from the side plate. The bottom plate is attached to and fixedly connected to the liquid cooling plate.

[0011] As an alternative, the base plate is fastened to the liquid cooling plate by fasteners.

[0012] As an alternative, the cavity is filled with a first foam adhesive, and the battery cell module is fixed in the cavity and integrally fixed with the module frame by the first foam adhesive.

[0013] As an alternative, the side of the liquid cooling plate closest to the cell module is coated with thermally conductive structural adhesive, and the cell module is bonded and fixed to the liquid cooling plate by the thermally conductive structural adhesive.

[0014] As an optional solution, the battery cell module includes multiple rows of battery cells, with a plastic bracket disposed between two adjacent rows of battery cells, and the two rows of battery cells are fixed to the plastic bracket by structural adhesive.

[0015] As an optional solution, the battery cell is a cylindrical battery cell, the plastic bracket is a serpentine bracket, and the sidewall of the battery cell fits snugly to the sidewall of the serpentine bracket.

[0016] A battery pack includes a housing, a cover plate, and the aforementioned battery module, wherein the battery module is disposed within the housing, and the cover plate is fastened to the housing.

[0017] As an alternative, a second foam adhesive is provided at the bottom of the housing, and the battery module is bonded and fixed to the housing by the second foam adhesive.

[0018] An electrical device comprising the aforementioned battery pack.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a battery module, including a liquid cooling plate, a module frame, and a cell module. The module frame is fixedly connected to the liquid cooling plate, and together they form a receiving cavity. The cell module is fixedly disposed within the receiving cavity and supported on the liquid cooling plate, allowing the liquid cooling plate to dissipate heat from the cell module. The battery module provided by this utility model integrates the liquid cooling plate and the module frame, using the liquid cooling plate as the bottom tray of the module frame. After the cell module is placed in the receiving cavity, the liquid cooling plate supports the cell module and simultaneously dissipates heat. After the cell module is fixed within the receiving cavity, the liquid cooling plate, cell module, and module frame are integrated into a single unit, which is then packaged as a whole. This saves materials, simplifies the production process, increases the strength of the battery module, and prevents deformation or other defects during production and handling.

[0021] This utility model also provides a battery pack, which simplifies the production process and improves the strength of the battery module by setting the above-mentioned battery module.

[0022] This utility model also provides an electrical device that, by setting the above-mentioned battery pack, can simplify the production process and improve the strength of the battery module. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the cooperation between the liquid cooling plate and the module frame provided in this embodiment of the utility model;

[0025] Figure 3 This is an exploded view of the liquid cooling plate and module frame assembly provided in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the battery cell module provided in an embodiment of the present invention;

[0027] Figure 5 This is an exploded view of the battery pack provided in an embodiment of this utility model.

[0028] In the picture:

[0029] 10. Battery module; 20. Housing; 30. Cover plate;

[0030] 1. Liquid cooling plate; 2. Module frame; 21. Side plate; 22. Base plate; 3. Battery cell module; 31. Battery cell; 32. Plastic bracket; 33. Structural adhesive; 4. Receiving cavity; 5. Fastener; 6. First foaming adhesive; 7. Thermally conductive structural adhesive. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction 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.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides a battery module 10, which includes a liquid cooling plate 1, a module frame 2, and a cell module 3. The module frame 2 is fixedly connected to the liquid cooling plate 1 and together with the liquid cooling plate 1, forms a receiving cavity 4. The cell module 3 is fixedly disposed within the receiving cavity 4 and supported on the liquid cooling plate 1. In this embodiment, the receiving cavity 4 is generally square. Of course, in other embodiments, the receiving cavity 4 can also be other shapes, which are not specifically limited here.

[0036] The battery module 10 provided in this embodiment fixes the liquid cooling plate 1 and the module frame 2 as one unit. The liquid cooling plate 1 serves as the bottom tray of the module frame 2. After the cell module 3 is placed in the receiving cavity 4, the liquid cooling plate 1 supports the cell module 3 and dissipates heat from the cell module 3. After the cell module 3 is fixed in the receiving cavity 4, the liquid cooling plate 1, the cell module 3, and the module frame 2 are integrated into one unit and then packed into a box. This not only saves materials and simplifies the production process, but also increases the strength of the battery module 10 and avoids deformation and other defects in the battery module 10 during production and handling.

[0037] It should be noted that the liquid cooling plate 1 mainly includes an outer shell and cooling pipes formed within the outer shell. The cooling pipes are filled with a cooling medium, which can carry away the surrounding heat during its flow. The specific structure and working principle of the liquid cooling plate 1 are existing technologies and will not be elaborated upon here.

[0038] Specifically, such as Figure 2 and Figure 3 As shown, the module frame 2 includes a side plate 21 and a bottom plate 22. The side plate 21 has a ring-shaped structure and forms a receiving cavity 4 with the liquid cooling plate 1. The bottom plate 22 is connected to the bottom end of the side plate 21 and extends outward from the side plate 21. Specifically, the bottom plate 22 is perpendicular to the side plate 21, and the bottom plate 22 is attached to and fixedly connected to the liquid cooling plate 1. The contact area between the bottom plate 22 and the liquid cooling plate 1 is relatively large, and the connection is relatively firm.

[0039] In this embodiment, the base plate 22 is fastened to the liquid cooling plate 1 by a plurality of fasteners 5. Specifically, the plurality of fasteners 5 surround the base plate 22 to connect the base plate 22 and the liquid cooling plate 1 as a whole. The fasteners 5 are combinations of bolts and nuts, with the bolts passing through the liquid cooling plate 1 and the base plate 22 sequentially from bottom to top and then locked in place by the nuts. In other optional embodiments, the base plate 22 can also be fixed to the liquid cooling plate 1 as a whole by welding, bonding, or other methods.

[0040] like Figure 1 As shown, the cavity 4 is filled with a first expanding foam 6. The battery cell module 3 is fixed in the cavity 4 and integrated with the module frame 2 by the first expanding foam 6. After placing the battery cell module 3 in the cavity 4, the first expanding foam 6 is poured into the cavity 4 until it is basically flush with the side plate 21. The first expanding foam 6 can fill all the gaps in the cavity, thereby solidifying the module frame 2 and the battery cell module 3 into one unit. It can withstand vibration, impact or long-term load, has a stable and firm connection, is easy to operate, and has a low cost.

[0041] like Figure 2As shown, the side of the liquid cooling plate 1 closest to the cell module 3 is coated with thermally conductive structural adhesive 7, and the cell module 3 is bonded and fixed to the liquid cooling plate 1 by the thermally conductive structural adhesive 7. The thermally conductive structural adhesive 7 can fix the cell module 3 and the liquid cooling plate 1 into one unit, further increasing the strength of the battery module 10. At the same time, the thermally conductive structural adhesive 7 makes a uniform thermally conductive connection between the cell module 3 and the liquid cooling plate 1, which can quickly transfer heat, thereby making the heat dissipation of the cell module 3 by the liquid cooling plate 1 more uniform.

[0042] like Figure 2 As shown, the module frame 2 and the liquid cooling plate 1 enclose a basin-shaped cavity 4, which can prevent the adhesive from overflowing from all sides when applying the thermally conductive structural adhesive 7 and pouring the first foaming adhesive 6 on the liquid cooling plate 1, thus simplifying the production process and reducing production costs.

[0043] Furthermore, such as Figure 4 As shown, the battery cell module 3 includes multiple rows of battery cells 31, with multiple cells 31 in each row. A plastic bracket 32 ​​is provided between two adjacent rows of battery cells 31, and the two rows of battery cells 31 are fixed to the plastic bracket 32 ​​by structural adhesive 33. In this way, several battery cells 31 can be integrated together to form the battery cell module 3 through the plastic bracket 32 ​​and structural adhesive 33. The process is simple and the production cost is low. Among them, the multiple battery cells 31 in the battery cell module 3 can be connected in series, parallel, or mixed. Mixed connection means that multiple battery cells 31 are connected in both series and parallel.

[0044] In this embodiment, the battery cell 31 is a cylindrical battery cell, and the plastic bracket 32 ​​is a serpentine bracket, with the sidewall of the battery cell 31 fitting snugly to the sidewall of the serpentine bracket. This increases the contact area between the battery cell 31 and the plastic bracket 32, resulting in a stronger bond and a more compact structure, saving space and allowing the receiving cavity 4 to accommodate more battery cells 31, thereby increasing the capacity of the battery module 10.

[0045] It should be noted that, as Figure 1 As shown, in this embodiment, the receiving cavity 4 contains three battery cell modules 3. In other embodiments, the receiving cavity 4 may also contain one, two, or more battery cell modules 3, without specific limitations. When two or more battery cell modules 3 are provided, the multiple battery cell modules 3 can be connected in series or in parallel to form a whole and housed in the receiving cavity 4. The battery module 10 also includes other structures, such as a busbar component, which is used to realize the electrical connection between multiple battery cells 31. The busbar component is prior art and will not be described in detail here.

[0046] like Figure 5As shown, this embodiment also provides a battery pack, including a housing 20, a cover plate 30, and the aforementioned battery module 10. The housing 20 provides a space for the battery module 10, which is disposed within the housing 20. The cover plate 30 is fastened to the housing 20. Since this battery pack adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0047] Furthermore, a second foam adhesive (not shown) is provided at the bottom of the housing 20. The liquid cooling plate 1 of the battery module 10 is bonded and fixed to the housing 20 by the second foam adhesive, so that the battery module 10 and the housing 20 are solidified into a whole, which enhances the strength of the battery pack and can resist the damage to the battery pack caused by bottom impact.

[0048] The specific assembly steps of the battery pack provided in this embodiment are as follows:

[0049] 1. Secure the liquid cooling plate 1 to the module frame 2 together with bolts and nuts;

[0050] 2. The battery cell 31 is bonded to the plastic bracket 32 ​​using structural adhesive 33 to form the battery cell module 3;

[0051] 3. Apply thermally conductive structural adhesive 7 to the upper surface of the liquid cooling plate 1;

[0052] 4. The battery cell module 3 is installed into the cavity 4 formed by the module frame 2 and the liquid cooling plate 1, and the battery cell module 3 is adhered to the thermally conductive structural adhesive 7.

[0053] 5. Inject the first foaming adhesive 6 into the module frame 2 to fill the gaps between the cells 31, and solidify the module frame 2 and the cell module 3 into one unit to form the battery module 10.

[0054] 6. Pour the second foaming adhesive into the bottom of the box 20, then install the battery module 10 inside the box 20. The battery module 10 is fixed inside the box 20 by the second foaming adhesive. Finally, install the cover plate 30.

[0055] This embodiment also provides an electrical device, including the battery pack described above. Since this electrical device employs all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0056] It should be noted that electrical devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc., without specific limitations.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery module, characterized in that, It includes a liquid cooling plate (1), a module frame (2) and a battery cell module (3). The module frame (2) is fixedly connected to the liquid cooling plate (1) and together with the liquid cooling plate (1) forms a receiving cavity (4). The battery cell module (3) is fixedly disposed in the receiving cavity (4) and supported on the liquid cooling plate (1).

2. The battery module of claim 1, wherein, The module frame (2) includes a side plate (21) and a bottom plate (22). The side plate (21) has an annular structure and surrounds the liquid cooling plate (1) to form the receiving cavity (4). The bottom plate (22) is connected to the bottom end of the side plate (21) and extends outward from the side plate (21). The bottom plate (22) is attached to and fixedly connected to the liquid cooling plate (1).

3. The battery module of claim 2, wherein, The base plate (22) is fastened to the liquid cooling plate (1) by fasteners (5).

4. The battery module of claim 1, wherein, The cavity (4) is filled with a first foam adhesive (6), and the battery cell module (3) is fixed in the cavity (4) by the first foam adhesive (6) and is fixed as a whole with the module frame (2).

5. The battery module of claim 1, wherein, The liquid cooling plate (1) is coated with thermally conductive structural adhesive (7) on the side near the battery cell module (3), and the battery cell module (3) is bonded and fixed to the liquid cooling plate (1) by the thermally conductive structural adhesive (7).

6. The battery module according to claim 1, characterized in that, The battery cell module (3) includes multiple rows of battery cells (31), and a plastic bracket (32) is provided between two adjacent rows of battery cells (31). The two rows of battery cells (31) are fixed to the plastic bracket (32) by structural adhesive (33).

7. The battery module of claim 6, wherein, The battery cell (31) is a cylindrical battery cell, and the plastic bracket (32) is a serpentine bracket. The sidewall of the battery cell (31) fits snugly with the sidewall of the serpentine bracket.

8. A battery pack, characterized by, It includes a housing (20), a cover plate (30), and a battery module as described in any one of claims 1-7, wherein the battery module is disposed inside the housing (20), and the cover plate (30) is fastened to the housing (20).

9. The battery pack of claim 8, wherein, A second foam adhesive is provided at the bottom of the housing (20), and the battery module is bonded and fixed to the housing (20) by the second foam adhesive.

10. An electric device, characterized by Includes the battery pack as described in any one of claims 8-9.

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