Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, the battery pack comprises a plurality of liquid cooling plates, a plurality of side frames and a plurality of battery modules, the plurality of liquid cooling plates are sequentially arranged at intervals along the gravity direction, the side frame is arranged between every two adjacent liquid cooling plates, two ends of each side frame are connected with the two liquid cooling plates, and the battery modules are connected with the liquid cooling plates. The plurality of side frames and the plurality of liquid cooling plates jointly enclose to form the plurality of battery cabins, and the structure provides a stable supporting frame for the battery module, so that the internal structure of the battery pack is simplified. The multiple battery modules are installed in the multiple battery cabins respectively, the two ends, deviating from each other, of the battery modules in the gravity direction are in heat conduction connection with the corresponding liquid cooling plates, and the two ends of each liquid cooling plate are cooled by the liquid cooling plates, so that the temperature gradient in the battery modules is reduced, heat dissipation of the multiple battery modules is uniform, and the service life of the battery modules is prolonged. The working efficiency and the service life of the battery module are improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to battery packs and electrical equipment. Background Technology

[0002] A battery pack typically consists of a housing and battery modules housed within the housing. To improve the energy density of the battery pack, a double-layer battery module is usually installed inside the housing. The double-layer battery module consists of an upper battery module and a lower battery module. The upper battery module requires a middle support plate for support and an upper liquid cooling plate for cooling, while the lower battery module requires a bottom support plate for support and a lower liquid cooling plate for cooling. This design results in a complex internal structure of the battery pack and uneven heat dissipation in the double-layer battery module. Utility Model Content

[0003] The present invention provides a battery pack and electrical equipment, which aims to solve the problems of complex internal structure of battery packs and uneven heat dissipation of double-layer battery modules in related technologies.

[0004] In a first aspect, embodiments of the present invention provide a battery pack.

[0005] In one embodiment, the battery pack includes:

[0006] Multiple liquid cooling plates are arranged at intervals along the direction of gravity;

[0007] Multiple side frames are provided between two adjacent liquid cooling plates, and each side frame is connected to two liquid cooling plates at both ends. The multiple side frames and multiple liquid cooling plates are arranged together to form multiple battery compartments.

[0008] Multiple battery modules are installed in multiple battery compartments, and both ends of the battery modules that are opposite to each other along the direction of gravity are thermally connected to the corresponding liquid cooling plates.

[0009] In one embodiment, the plurality of liquid cooling plates includes a first liquid cooling plate that is lowest along the direction of gravity;

[0010] The plurality of side frames include a first side frame, which is mounted on the side of the first liquid cooling plate away from the direction of gravity;

[0011] The battery pack also includes an end plate and a first electrical component. The end plate is located on the side of the first side frame away from the battery compartment. The end plate, the side frame, and the first liquid cooling plate together form a first electrical compartment. The first electrical component is installed in the first electrical compartment.

[0012] In one embodiment, the plurality of liquid cooling plates includes a second liquid cooling plate connected to the first side frame;

[0013] The plurality of side frames also include at least two second side frames, the plurality of second side frames being connected to the side of the second liquid cooling plate opposite to the direction of gravity, the plurality of second side frames being spaced apart, and the battery module being installed in each second side frame.

[0014] In one embodiment, the plurality of liquid cooling plates further includes a third liquid cooling plate, which includes a plurality of liquid distribution cooling plates. The plurality of liquid distribution cooling plates are arranged in a one-to-one correspondence with a plurality of second side frames, and each liquid distribution cooling plate is connected to the side of the corresponding second side frame opposite to the second liquid cooling plate.

[0015] In one embodiment, it further includes a cover portion, which is disposed on the side of the first side frame away from the direction of gravity, and the periphery of the cover portion is connected to the periphery of the first side frame;

[0016] The third liquid cooling plate, the second side frame, and the second liquid cooling plate are all located within the cover portion.

[0017] In one embodiment, the enclosure and the second liquid cooling plate together form a second electrical compartment;

[0018] The battery pack also includes a second electrical component, which is installed in the second electrical compartment and electrically connected to the battery module located in the second side frame.

[0019] In one embodiment, the cover includes:

[0020] Multiple covers are provided, and each of the multiple covers is corresponding to a multiple of the second side frames. Each cover is used to cover the corresponding second side frame and the liquid distribution cooling plate.

[0021] The connecting body is disposed around the periphery of the plurality of covers and is connected to one end of the plurality of covers adjacent to the second liquid cooling plate. The periphery of the connecting body is connected to the periphery of the first side frame.

[0022] In one embodiment, the side frame includes:

[0023] Two side beams are arranged opposite each other and spaced apart along a first direction, and each side beam extends along a second direction. The first direction, the second direction, and the gravity direction intersect each other in pairs.

[0024] Multiple longitudinal beams are spaced apart along the second direction, and each longitudinal beam extends along the first direction; and

[0025] Multiple reinforcing members are provided at the ends of multiple longitudinal beams. Each reinforcing member includes a connecting seat and a plug-in portion protruding from the connecting seat. The connecting seat is fixedly connected to the side beam, and the plug-in portion is plugged into the end of the corresponding longitudinal beam. The plug-in portion has two first sidewalls that are arranged opposite to each other along the second direction. The two first sidewalls are fixedly connected to the corresponding longitudinal beam through multiple connectors.

[0026] In one embodiment, the longitudinal beam includes:

[0027] The connecting portion abuts against the liquid cooling plate, and the connecting portion has two first sides that are disposed opposite to each other along the second direction;

[0028] Two protrusions are provided on the two first sides, and each of the protrusions is welded to the liquid cooling plate.

[0029] In one embodiment, a reinforcement is also included, which is connected to at least two of the plurality of liquid cooling plates, the reinforcement being used to support the side frame between the at least two liquid cooling plates.

[0030] In one embodiment, a filler is also included, which fills the gap between the side frame and the battery module.

[0031] Secondly, embodiments of this utility model provide an electrical device.

[0032] In one embodiment, the electrical device includes a battery pack as described above.

[0033] The beneficial effects of the embodiments of this utility model are as follows:

[0034] In this embodiment of the invention, the liquid cooling plate and side frame together form multiple battery compartments. This structure provides a stable support frame for the battery modules, thereby simplifying the internal structure of the battery pack. Since the battery modules are all surrounded by the side frames, the side frames can effectively resist the expansion forces generated by thermal expansion and contraction during charging and discharging, reducing damage or deformation caused by expansion. Both ends of each liquid cooling plate are cooled, which helps reduce the temperature gradient inside the battery module, resulting in uniform heat dissipation across multiple battery modules and improving their efficiency and lifespan. Uniform temperature distribution not only improves the efficiency of the battery modules but also reduces inconsistencies in battery module performance caused by temperature differences. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the battery pack structure shown;

[0038] Figure 3 yes Figure 2 A magnified view of part A shown below;

[0039] Figure 4 yes Figure 1 A cross-sectional view of the side frame, liquid cooling plate, and cover assembly shown below.

[0040] Figure 5 yes Figure 4 A magnified view of part B shown below;

[0041] Figure 6 This is a schematic diagram of the structure of the second side frame provided in an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the side frame provided in an embodiment of the present invention;

[0043] Figure 8 yes Figure 7 A magnified view of part C shown;

[0044] Figure 9 yes Figure 7 A cross-sectional view of the side frame shown;

[0045] Figure 10 yes Figure 9 A magnified view of a portion at point D is shown.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Battery pack; 10. Liquid cooling plate; 11. First liquid cooling plate; 12. Second liquid cooling plate; 13. Third liquid cooling plate; 131. Sub-liquid cooling plate; 20. Side frame; 21. First side frame; 22. Second side frame; 23. Side beam; 24. Longitudinal beam; 241. Connecting part; 242. Protrusion; 25. Reinforcing member; 251. Connecting seat; 252. Insertion part; 26. Through hole; 30. Battery module; 40. End plate; 41. Maintenance window; 51. Battery compartment; 52. First electrical compartment; 53. Second electrical compartment; 61. First electrical component; 62. Second electrical component; 70. Covering part; 71. Cover body; 72. Connecting body; 80. Cover plate; 90. Connector; 110. Reinforcing member. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0049] A battery pack typically consists of a housing and battery modules housed within the housing. To improve the energy density of the battery pack, a double-layer battery module is usually installed inside the housing. The double-layer battery module consists of an upper battery module and a lower battery module. The upper battery module requires a middle support plate for support and an upper liquid cooling plate for cooling, while the lower battery module requires a bottom support plate for support and a lower liquid cooling plate for cooling. This design results in a complex internal structure of the battery pack and uneven heat dissipation in the double-layer battery module.

[0050] In view of this, the present invention proposes a battery pack, Figures 1 to 10 This is a schematic diagram of an embodiment of the battery pack provided by this utility model. The battery pack provided by this utility model simplifies the internal structure of the battery pack and makes the heat dissipation of the multiple battery modules inside the battery pack more uniform. The battery pack will be described in detail below with reference to the main accompanying drawings.

[0051] Reference Figures 1 to 4The battery pack 100 includes multiple liquid cooling plates 10, multiple side frames 20, and multiple battery modules 30, which are arranged sequentially at intervals along the direction of gravity. A side frame 20 is provided between each two adjacent liquid cooling plates 10. Both ends of each side frame 20 are connected to the two liquid cooling plates 10. The multiple side frames 20 and the multiple liquid cooling plates 10 together form multiple battery compartments 51. The multiple battery modules 30 are respectively installed in the multiple battery compartments 51, and the two ends of the battery modules 30 that are set opposite to each other along the direction of gravity are thermally connected to the corresponding liquid cooling plates 10.

[0052] In this embodiment of the invention, the liquid cooling plate 10 and the side frame 20 together form multiple battery compartments 51. This structure provides a stable support frame for the battery module 30, thereby simplifying the internal structure of the battery pack 100. Since the battery modules 30 are all surrounded by the side frame 20, the side frame 20 can effectively resist the expansion force generated by thermal expansion and contraction during charging and discharging, reducing damage or deformation caused by expansion. Both ends of each liquid cooling plate 10 are cooled by the liquid cooling plate 10, which helps reduce the temperature gradient inside the battery module 30, resulting in uniform heat dissipation across multiple battery modules 30 and improving the working efficiency and lifespan of the battery modules 30. Uniform temperature distribution not only improves the working efficiency of the battery module 30 but also reduces the problem of inconsistent performance of the battery modules 30 due to temperature differences.

[0053] Reference Figure 2 and Figure 4 In one embodiment, the plurality of liquid cooling plates 10 include a first liquid cooling plate 11 located at its lowest point along the direction of gravity, and the plurality of side frames 20 include a first side frame 21 mounted on the side of the first liquid cooling plate 11 away from the direction of gravity. The battery pack 100 also includes an end plate 40 and a first electrical component 61. The end plate 40 is located on the side of the first side frame 21 away from the battery compartment 51. The end plate 40, side frames 20, and first liquid cooling plate 11 together form a first electrical compartment 52, and the first electrical component 61 is mounted in the first electrical compartment 52. In this way, the first liquid cooling plate 11 can cool the battery module 30 in the battery compartment 51 while also cooling the first electrical component 61 in the electrical compartment, improving the cooling efficiency of the first liquid cooling plate 11, reducing the number of cooling components required, and thus reducing cost and complexity. The first electrical compartment 52 provides additional protection for the electrical component, preventing it from being damaged by dust, moisture, or other external contaminants.

[0054] Figure 2 , Figure 4 and Figure 6In one embodiment, the plurality of liquid cooling plates 10 include a second liquid cooling plate 12 connected to the first side frame 21, and the plurality of side frames 20 further include at least two second side frames 22. The plurality of second side frames 22 are connected to the side of the second liquid cooling plate 12 opposite to the direction of gravity. The plurality of second side frames 22 are spaced apart, and a battery module 30 is installed in each second side frame 22. In this way, the second liquid cooling plate 12 can simultaneously cool the battery module 30 in the first side frame 21 and the battery module 30 in the second side frame 22, making the heat distribution in the battery pack 100 more uniform, helping to reduce local overheating and improve the overall heat dissipation efficiency. The plurality of second side frames 22 are connected to the second liquid cooling plate 12 to form a stable support structure. This design helps to resist the deformation and damage of the battery pack 100 when subjected to external impact or vibration. By installing the battery module 30 inside the second side frame 22 and connecting it to the second liquid cooling plate 12, the second side frame 22 can resist the expansion force of the battery module 30 inside, reducing damage or deformation of the battery module 30 caused by expansion. Each second side frame 22 has a battery module 30 installed inside. This design facilitates the installation, maintenance and replacement of the battery module 30, reduces the overall maintenance cost of the battery pack 100, and facilitates heat dissipation of the battery module 30 inside the second side frame 22.

[0055] It should be noted that the number of battery modules 30 installed in the second side frame 22 can be set as needed. For example, one, two or more battery modules 30 can be set in the second side frame 22. Specifically, this application does not limit this.

[0056] Reference Figure 2 and Figure 4In one embodiment, the plurality of liquid cooling plates 10 further includes a third liquid cooling plate 13, which includes a plurality of sub-cooling plates 131. Each sub-cooling plate 131 is correspondingly arranged with a plurality of second side frames 22. Each sub-cooling plate 131 is connected to the side of the corresponding second side frame 22 facing away from the second liquid cooling plate 12. Thus, each second side frame 22 corresponds to one sub-cooling plate 131, ensuring that the battery modules 30 within the second side frame 22 are adequately cooled. This design avoids localized heat accumulation within the battery pack 100, resulting in a more uniform heat distribution and improved overall heat dissipation efficiency. The coolant has a shorter flow path within the sub-cooling plates 131, reducing flow resistance and enabling the heat dissipation system to respond more quickly to temperature changes. When adding battery modules 30, only the corresponding second side frames 22 and sub-cooling plates 131 need to be added, without requiring large-scale modifications to the entire battery pack 100. This design improves the flexibility and scalability of the battery pack 100, allowing it to adapt to potential future changes. The design of the liquid cooling plate 131 allows each battery module 30 to be cooled independently, reducing the risk of system failure due to local overheating. This design improves the overall reliability of the battery pack 100, enabling it to operate stably in various harsh environments.

[0057] Reference Figure 1 and Figure 4 In one embodiment, the battery pack 100 further includes a cover portion 70, which is located on the side of the first side frame 21 opposite to the direction of gravity. The periphery of the cover portion 70 is connected to the periphery of the first side frame 21. The third liquid cooling plate 13, the second side frame 22, and the second liquid cooling plate 12 are all located within the cover portion 70. Thus, the design of the cover portion 70 protects the third liquid cooling plate 13, the second side frame 22, the second liquid cooling plate 12, and the battery module 30, reducing the risk of damage to the battery pack 100. The tight connection between the cover portion 70 and the first side frame 21 helps prevent external impurities such as moisture and dust from entering the battery pack 100, protecting the internal components of the battery pack 100 from damage. The third liquid cooling plate 13 and the second liquid cooling plate 12, placed within the cover portion 70, can more effectively exchange heat with the battery cells inside the battery pack 100. This design helps to quickly remove the heat generated by the battery module 30, reducing the temperature of the battery module 30 and improving its performance and lifespan.

[0058] Reference Figure 4In one embodiment, the cover 70 and the second liquid cooling plate 12 together enclose a second electrical compartment 53. The battery pack 100 also includes a second electrical component 62, which is installed within the second electrical compartment 53 and electrically connected to the battery module 30 located within the second side frame 22. This reduces the length and complexity of the electrical connection lines between the second electrical component 62 and the battery module 30 installed within the second side frame 22, thereby reducing the risk of electrical failure. The second electrical compartment 53 provides additional protection for the second electrical component 62, preventing it from being damaged by dust, moisture, or other external contaminants. The second liquid cooling plate 12 not only serves as part of the second electrical compartment 53 but also performs a heat dissipation function. This design improves the overall compactness of the battery pack 100 structure. The design of the second electrical compartment 53 allows for easy opening of the cover for inspection and maintenance of the second electrical component 62 when maintenance is required, simplifying the operation.

[0059] Reference Figure 1 and Figure 4 In one embodiment, the covering part 70 includes a plurality of covers 71 and a connecting body 72. The plurality of covers 71 are arranged one-to-one with a plurality of second side frames 22. Each cover 71 is used to cover the corresponding second side frame 22 and the liquid cooling plate 131. The connecting body 72 surrounds the periphery of the plurality of covers 71 and is connected to one end of the plurality of covers 71 adjacent to the second liquid cooling plate 12. The periphery of the connecting body 72 is connected to the periphery of the first side frame 21. In this way, the space between two adjacent covers 71 is provided to provide installation space for the subsequent installation of other components. The covers 71 can effectively cover the corresponding second side frame 22 and the liquid cooling plate 131, playing a protective and isolation role, preventing external contaminants (such as dust, moisture, etc.) from entering. The connecting body 72 surrounds the periphery of the multiple covers 71 and is connected to the covers 71 and the first side frame 21 to form a stable structural frame. This design not only enhances the overall structural strength of the cover part 70, but also connects the multiple covers 71 into one unit, simplifying the installation and disassembly of the multiple covers 71.

[0060] Reference Figure 1 , Figure 7 and Figure 9In one embodiment, a maintenance window 41 is provided on the side of the end plate 40, which is connected to the first electrical compartment 52. This allows maintenance personnel to directly observe the interior of the first electrical compartment 52, thus facilitating faster problem localization. The detachable connection between the cover plate 80 and the end plate 40 allows maintenance personnel to easily open the cover plate 80 and enter the first electrical compartment 52 for maintenance and inspection without disassembling the entire battery pack 100, significantly saving maintenance time and costs. The cover plate 80 also provides protection, preventing external debris from entering the first electrical compartment 52 and damaging the internal components of the battery pack 100.

[0061] Reference Figures 7 to 9In one embodiment, the side frame 20 includes two side beams 23, multiple longitudinal beams 24, and multiple reinforcing members 25. The two side beams 23 are arranged opposite to each other and spaced apart along a first direction. Each side beam 23 extends along a second direction. The first direction, the second direction, and the gravity direction intersect each other. The multiple longitudinal beams 24 are arranged spaced apart along the second direction. In this way, the cross arrangement allows the frame to form a stable support structure in both directions, effectively improving the stability of the overall frame structure. Each longitudinal beam 24 extends along a first direction, and multiple reinforcing members 25 are provided at the ends of the longitudinal beams 24. Each reinforcing member 25 includes a connecting seat 251 and a plug-in portion 252 protruding from the connecting seat 251. The connecting seat 251 is fixedly connected to the side beam 23, and the plug-in portion 252 is plugged into the end of the corresponding longitudinal beam 24. The plug-in portion 252 has two first sidewalls arranged opposite to each other along a second direction. The two first sidewalls are fixedly connected to the corresponding longitudinal beam 24 through multiple connectors 90. In this way, the reinforcing members 25 are provided at the ends of the longitudinal beams 24, and are fixedly connected to the side beams 23 through the connecting seats 251, thus fixing the position of the connecting seats 251. The plug-in engagement of the plug-in portion 252 with the longitudinal beams 24 not only simplifies the assembly process but also increases the contact area between the plug-in portion 252 and the longitudinal beams 24, thereby increasing the connection strength between the longitudinal beams 24 and the side beams 23 and further improving the overall structural stability of the side frame 20. The connector 251 of the reinforcement 25 is fixedly connected to the side beam 23, and the insertion part 252 is inserted into the longitudinal beam 24 and fixed with multiple connectors 90. This design allows the reinforcement 25 to effectively transmit and disperse external forces, enhancing the bending and torsional resistance of the side frame 20 and enabling the side frame 20 to meet the structural strength requirements of the high-capacity battery pack 100. The insertion part 252 of the reinforcement 25 has two first sidewalls arranged opposite to each other along a second direction. The two first sidewalls are fixedly connected to the corresponding longitudinal beam 24 through multiple connectors 90. This ensures a fixed connection between the insertion part 252 and the longitudinal beam 24, preventing separation of the insertion part 252 and the longitudinal beam 24 and improving the overall connection strength of the side frame 20. In addition, the two first sidewalls being arranged opposite to each other along the second direction provides a large operating space when fixing the insertion part 252 to the corresponding longitudinal beam 24 through the connectors 90, making the connection and fixing operation of the insertion part 252 to the longitudinal beam 24 simple.

[0062] Reference Figure 7In one embodiment, the longitudinal beam 24 includes a connecting portion 241 and two protrusions 242. The connecting portion 241 abuts against the liquid cooling plate 10 and has two first sides disposed opposite to each other along a second direction. The two protrusions 242 protrude from the two first sides, and each protrusion 242 is welded to the liquid cooling plate 10. Thus, by providing the protrusions 242, when the longitudinal beam 24 is welded to the liquid cooling plate 10, the welding mainly occurs between the protrusions 242 and the liquid cooling plate 10. Since the protrusions 242 are relatively thin and have a small heat capacity, they can easily heat up and reach the melting temperature, thereby forming a weld. This ensures that when the longitudinal beam 24 reaches the required penetration depth, the temperature rise of the liquid cooling plate 10 remains within the allowable range, avoiding the risk of overheating and burn-through. In this way, a balance can be achieved between the welding penetration depth of the longitudinal beam 24 and the requirement that the liquid cooling plate 10 is not burned through, reducing the risk of burn-through of the liquid cooling plate 10 and improving the welding quality.

[0063] Reference Figures 2 to 5 In one embodiment, the battery pack 100 further includes a reinforcing member 110, which is connected to at least two of the plurality of liquid cooling plates 10, thereby ensuring a firm connection between the reinforcing member 110 and the at least two liquid cooling plates 10. The reinforcing member 110 supports the side frame 20 between the at least two liquid cooling plates 10, thus not only enhancing the overall strength of the battery pack 100 but also directly and effectively supporting the side frame 20 between the at least two liquid cooling plates 10. This design allows the side frame 20 between the at least two liquid cooling plates 10, the at least two liquid cooling plates 10, and the reinforcing member 110 to form a robust frame. This helps the side frame 20 resist the expansion force that may be generated by the cells of the battery module 30 during charging and discharging, preventing deformation of the battery pack 100. It can also suppress damage or deformation of the battery module 30 due to excessive expansion of the cells, improve the overall mode of the battery pack 100, and ensure the stability and safety of the battery module 30 during long-term use.

[0064] It should be noted that the way the reinforcing member 110 supports the side frame 20 between at least two liquid cooling plates 10 can be selected as needed. For example, in one embodiment, the reinforcing member 110 can abut against the outer wall of the side frame 20 between at least two liquid cooling plates 10. In another embodiment, the reinforcing member 110 can abut against the outer wall of the side frame 20 between at least two liquid cooling plates 10. In the embodiments of this application, the side frame 20 between at least two liquid cooling plates 10 is provided with a through hole 26. The reinforcing member 110 passes through the through hole 26 of the side frame 20 between at least two liquid cooling plates 10, and both ends are threadedly connected to the at least two liquid cooling plates 10. In this way, the contact area between the reinforcing member 110 and the side frame 20 between at least two liquid cooling plates 10 is increased, making the connection between the reinforcing member 110 and the side frame 20 between at least two liquid cooling plates 10 tighter and stronger, thereby improving the strength and stability of the connection between the reinforcing member 110 and the side frame 20 between at least two liquid cooling plates 10. The design of the reinforcement 110 being partially inserted into the through hole 26 helps to improve the structural rigidity of the side frame 20 between at least two liquid cooling plates 10, so that the side frame 20 between at least two liquid cooling plates 10 can better resist deformation when subjected to external forces, and can better resist the expansion force generated by the battery module 30 during charging and discharging, thereby ensuring the safety and stability of the battery module 30.

[0065] In one embodiment, the battery pack 100 further includes a filler that fills the gap between the side frame 20 and the battery module 30. This effectively fills the gap, making the overall structure of the battery pack 100 more compact and complete. This tight filling reduces voids and weak points in the structure, thereby improving the overall stiffness of the battery pack 100. Increased overall stiffness helps reduce the deformation of the battery pack 100 under vibration conditions, thus improving its modal characteristics, including natural frequency and damping ratio. When the battery pack 100 is subjected to external excitation, the filler can slow down the propagation speed of vibration waves in the structure, reducing the impact of vibration on the battery module 30. This reduction in vibration transmission helps protect the battery module 30 from vibration damage and extends its service life. The addition of the filler also improves the safety of the battery pack 100. In extreme situations such as collisions or compression, the filler can act as a buffer, reducing the impact of external impacts on the battery module 30. At the same time, the tight filling method also helps to prevent the battery module 30 from shifting or loosening under vibration conditions, thereby reducing the safety risks caused by structural failure.

[0066] It should be noted that the type of filler can be selected as needed. For example, in one embodiment, the filler may include foam, polyurethane, polypropylene or polyimide, etc. Specifically, this application does not limit this.

[0067] Secondly, the embodiments of this utility model also propose an electrical device, including the battery pack 100 as described above. The specific structure of the battery pack 100 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0068] It should be noted that electrical equipment can include vehicles, energy storage power supplies, consumer electronics, medical equipment, smart cities, etc. Specifically, the selection of electrical equipment can be made according to needs, and this application does not impose any restrictions on it.

[0069] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized by, The battery pack comprises: a plurality of liquid cooling plates arranged in sequence and spaced apart along a gravity direction; a plurality of side frames, each of which is arranged between two adjacent liquid cooling plates and connected to the two liquid cooling plates at both ends, and a plurality of battery compartments are formed by the plurality of side frames and the plurality of liquid cooling plates; a plurality of battery modules, each of which is installed in a battery compartment and connected to a corresponding liquid cooling plate at both ends arranged away from each other along the gravity direction.

2. The battery pack of claim 1, wherein, The plurality of liquid cooling plates comprises a first liquid cooling plate located at the lowest position along the gravity direction; The plurality of side frames comprises a first side frame installed on a side of the first liquid cooling plate away from the gravity direction; The battery pack further comprises an end plate and a first electrical component, the end plate is arranged on a side of the first side frame away from the battery compartment, the end plate, the side frame and the first liquid cooling plate jointly form a first electrical compartment, and the first electrical component is installed in the first electrical compartment.

3. The battery pack of claim 2, wherein, The plurality of liquid cooling plates comprises a second liquid cooling plate connected to the first side frame; The plurality of side frames further comprises at least two second side frames, the plurality of second side frames are connected to a side of the second liquid cooling plate away from the gravity direction, and the plurality of second side frames are arranged in sequence and spaced apart, and each of the second side frames is installed with the battery module.

4. The battery pack of claim 3, wherein, The plurality of liquid cooling plates further comprises a third liquid cooling plate, the third liquid cooling plate comprises a plurality of sub-liquid cooling plates, the plurality of sub-liquid cooling plates are arranged in one-to-one correspondence with the plurality of second side frames, and each of the sub-liquid cooling plates is connected to a side of the corresponding second side frame away from the second liquid cooling plate.

5. The battery pack of claim 4, wherein, The battery pack further comprises a cover part, the cover part is arranged on a side of the first side frame away from the gravity direction, and the periphery of the cover part is connected to the periphery of the first side frame; The third liquid cooling plate, the second side frame and the second liquid cooling plate are all located in the cover part.

6. The battery pack of claim 5, wherein, The cover part and the second liquid cooling plate jointly form a second electrical compartment; The battery pack further comprises a second electrical component, the second electrical component is installed in the second electrical compartment and electrically connected to the battery module located in the second side frame.

7. The battery pack of claim 5, wherein, The cover part comprises: a plurality of cover bodies, the plurality of cover bodies are arranged in one-to-one correspondence with the plurality of second side frames, and each of the cover bodies is used to cover the corresponding second side frame and the sub-liquid cooling plate; a connecting body arranged on the side of the plurality of cover bodies and connected to one end of the plurality of cover bodies adjacent to the second liquid cooling plate, and the periphery of the connecting body is connected to the periphery of the first side frame.

8. The battery pack of any one of claims 1-7, wherein, The side frame comprises: two edge beams arranged opposite and spaced apart along a first direction, each of which extends along a second direction, and the first direction, the second direction and the gravity direction are arranged in pairs of two; a plurality of longitudinal beams arranged in sequence and spaced apart along the second direction, each of which extends along the first direction; and A plurality of reinforcing members are arranged corresponding to the end portions of the plurality of longitudinal beams, each of the reinforcing members comprises a connecting seat and a plug-in portion protruding from the connecting seat, the connecting seat is fixedly connected with the edge beam, the plug-in portion is plug-in matched with the end portion of the corresponding longitudinal beam, the plug-in portion has two first side walls arranged away from each other along the second direction, and the two first side walls are fixedly connected with the corresponding longitudinal beam through a plurality of connecting members.

9. The battery pack of claim 8, wherein, The longitudinal beam comprises: A connecting portion abutting against the liquid cooling plate, the connecting portion has two first sides arranged away from each other along the second direction; Two protruding portions protruding from the two first sides, each of the protruding portions is welded with the liquid cooling plate.

10. The battery pack of any one of claims 1-7, wherein, Further comprising a reinforcing member connected with at least two of the plurality of liquid cooling plates, the reinforcing member is used to support the side frame between the at least two liquid cooling plates.

11. The battery pack of any one of claims 1-7, wherein, Further comprising a filling member filling the gap between the side frame and the battery module.

12. An electrical device, characterized by The battery pack comprises the battery pack according to any one of claims 1 to 11.

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