Battery module, battery pack and electric device

Abstract

A battery module, a battery pack and an electric device. The battery module comprises a liquid cooling plate (1), a module frame (2) and a battery cell module (3), wherein the module frame (2) is fixedly connected to the liquid cooling plate (1), and forms an accommodating cavity (4) together with the liquid cooling plate (1) by means of enclosing; and the battery cell module (3) is fixedly arranged in the accommodating cavity (4) and is supported on the liquid cooling plate (1).

Description

Battery modules, battery packs and electrical equipment

[0001] This application claims priority to Chinese Patent Application No. 202521293089.5, filed with the Chinese Patent Office on June 23, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, such as a battery module, battery pack, and electrical equipment. Background Technology

[0003] 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.

[0004] In related technologies, in order to enable the battery to charge and discharge at a suitable temperature, the battery module is cooled by a liquid cooling plate inside the battery pack. Traditional battery packs usually integrate the liquid cooling plate directly into the housing or install the liquid cooling plate on the housing with bolts, and finally place the battery module on the liquid cooling plate to achieve cooling of the battery module by the liquid cooling plate.

[0005] Technical issues

[0006] While this design is simple to install and operate, the lack of direct connection between the liquid cooling plate and the battery module results in low rigidity of the battery module, making it prone to breakage and damage under vibration. Furthermore, due to its insufficient strength, the battery module is susceptible to deformation during welding and handling. Summary of the Invention

[0007] Technical solutions

[0008] In a first aspect, embodiments of this application provide 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 with the liquid cooling plate form a receiving cavity. The cell module is fixedly disposed in the receiving cavity and supported on the liquid cooling plate.

[0009] Secondly, embodiments of this application provide a battery pack, including 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.

[0010] Thirdly, embodiments of this application provide an electrical device including the aforementioned battery pack.

[0011] Beneficial effects

[0012] This application 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 with the liquid cooling plate, 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 in this application 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 from it. 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 design saves materials, simplifies the production process, and improves the strength of the battery module, preventing deformation and other defects during production and handling.

[0013] This application also provides a battery pack, which simplifies the manufacturing process and improves the strength of the battery module by setting the above-mentioned battery module.

[0014] This application also provides an electrical device in which the above-mentioned battery pack can be configured to simplify the manufacturing process and improve the strength of the battery module. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the battery module provided in an embodiment of this application;

[0016] Figure 2 is a schematic diagram of the cooperation between the liquid cooling plate and the module frame provided in the embodiment of this application;

[0017] Figure 3 is an exploded view of the liquid cooling plate and module frame provided in the embodiment of this application;

[0018] Figure 4 is a schematic diagram of the battery cell module provided in an embodiment of this application;

[0019] Figure 5 is an exploded view of the battery pack provided in an embodiment of this application;

[0020] Figure 6 is a partial structural schematic diagram of the battery pack provided in an embodiment of this application;

[0021] Figure 7 is a schematic diagram of the structure of the electrical equipment provided in the embodiment of this application.

[0022] In the picture:

[0023] 10. Battery module; 20. Housing; 30. Cover plate; 40. Second foam adhesive;

[0024] 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. Fasteners; 6. First foam adhesive; 7. Thermally conductive structural adhesive;

[0025] 100. Battery pack; 200. Main body of the equipment; 300. Load unit. Detailed Implementation

[0026] As shown in Figures 1 and 2, 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; in other embodiments, the receiving cavity 4 may also be of other shapes.

[0027] The battery module 10 provided in this embodiment fixes the liquid cooling plate 1 and the module frame 2 as one unit, and uses the liquid cooling plate 1 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 for 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 as a whole. This can save materials, simplify the production process, and improve the strength of the battery module 10, avoiding deformation and other defects in the battery module 10 during production and handling.

[0028] 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 related technologies and will not be elaborated on here.

[0029] In some embodiments, as shown in Figures 2 and 3, 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 a 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. Exemplarily, 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 large, resulting in a strong connection.

[0030] In this embodiment, the base plate 22 is fastened to the liquid cooling plate 1 by a plurality of fasteners 5. Exemplarily, 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 embodiments, the base plate 22 can also be fixed to the liquid cooling plate 1 by welding, bonding, or other methods.

[0031] As shown in Figure 1, the cavity 4 is filled with 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.

[0032] As shown in Figure 2, 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 not only fixes the cell module 3 and the liquid cooling plate 1 into one unit, improving the strength of the battery module 10, but also forms a uniform thermally conductive connection between the cell module 3 and the liquid cooling plate 1, quickly transferring heat, thereby making the heat dissipation of the cell module 3 by the liquid cooling plate 1 more uniform.

[0033] As shown in Figure 2, 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, simplifying the production process and reducing production costs.

[0034] In some embodiments, as shown in FIG4, the battery cell module 3 includes multiple rows of battery cells 31, with multiple battery cells 31 in each row. A plastic bracket 32 ​​is disposed 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, multiple battery cells 31 can be integrated together to form the battery cell module 3 through the plastic bracket 32 ​​and structural adhesive 33, which is simple in process and has low production cost. 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.

[0035] 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 not only increases the contact area between the battery cell 31 and the plastic bracket 32, making the bonding stronger, but also makes the structure more compact, reducing space occupation, allowing the receiving cavity 4 to accommodate more battery cells 31, thereby increasing the capacity of the battery module 10.

[0036] As shown in Figure 1, 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. 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 configured to realize the electrical connection between multiple battery cells 31. The busbar component belongs to related technology and will not be described in detail here.

[0037] As shown in Figure 5, this embodiment also provides a battery pack, including a housing 20, a cover plate 30, and the aforementioned battery module 10. The housing 20 is configured to provide a space for the battery module 10, the battery module 10 is disposed inside the housing 20, and the cover plate 30 is fastened to the housing 20. Since this battery pack adopts all the solutions of the above embodiments, it has at least all the beneficial effects brought about by the solutions of the above embodiments, which will not be described in detail here.

[0038] In some embodiments, as shown in FIG6, a second foam 40 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 40, so that the battery module 10 and the housing 20 are solidified into a whole, which not only enhances the strength of the battery pack, but also resists the damage to the battery pack caused by bottom impact.

[0039] The specific assembly steps of the battery pack provided in this embodiment are as follows:

[0040] 1. Secure the liquid cooling plate 1 to the module frame 2 together with bolts and nuts;

[0041] 2. The battery cell 31 is bonded to the plastic bracket 32 ​​using structural adhesive 33 to form the battery cell module 3;

[0042] 3. Apply thermally conductive structural adhesive 7 to the upper surface of the liquid cooling plate 1;

[0043] 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.

[0044] 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.

[0045] 6. Pour the second foaming adhesive 40 into the bottom of the box 20, then install the battery module 10 inside the box 20. The battery module 10 is bonded and fixed inside the box 20 by the second foaming adhesive 40. Finally, install the cover plate 30.

[0046] This embodiment also provides an electrical device, including the battery pack 100 described above. In some embodiments, as shown in FIG7, the electrical device provided in this application further includes a device body 200 and a load unit 300; the battery pack 100 is electrically connected to the load unit 300 via wires, configured to provide power to the load unit 300; the load unit 300 is fixedly connected to the device body 200, and the power drive end of the load unit 300 is drively connected to the operating mechanism of the device body 200 to realize the preset function of the electrical device. Since this electrical device adopts all the solutions of the above embodiments, it has at least all the beneficial effects brought by the solutions of the above embodiments, which will not be described in detail here.

[0047] Electrical devices can include mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, and so on. 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.

Claims

1. A battery module, comprising a liquid cooling plate (1), a module frame (2) and a cell module (3), wherein 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), and the cell module (3) is fixedly disposed in the receiving cavity (4) and supported on the liquid cooling plate (1).

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

4. The battery module according to 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 one unit with the module frame (2).

5. The battery module according to 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, wherein, 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 according to 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 to the sidewall of the serpentine bracket.

8. A battery pack comprising 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 within the housing (20), and the cover plate (30) is fastened to the housing (20).

9. The battery pack according to claim 8, wherein, A second foam adhesive (40) 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 (40).

10. An electrical device, comprising a device body (200), a load unit (300), and a battery pack (100) as described in any one of claims 8-9; the battery pack (100) is electrically connected to the load unit (300) via a wire, and is configured to provide power to the load unit (300); the load unit (300) is fixedly connected to the device body (200), and the power drive end of the load unit (300) is drively connected to the operating mechanism of the device body (200) to realize the preset function of the electrical device.

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