Battery pack, battery cluster and electric equipment

Abstract

The utility model relates to a battery pack, a battery cluster and electric equipment, and relates to the technical field of batteries. The battery pack comprises a battery cell, a box body and a support frame, the box body comprises a liquid cooling plate and a box cover, the battery cell is arranged on the liquid cooling plate, and the box cover covers the liquid cooling plate to package the battery cell. The supporting frame is of a frame structure, and the box body is arranged in the supporting frame. Wherein the liquid cooling plate is fixedly connected with the supporting frame, so that the box body is fixed in the supporting frame. According to the battery pack provided by the invention, the problems of low overall energy density and relatively high cost caused by low overall space utilization rate during assembly of the battery cluster in the prior art can be solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery pack, battery cluster, and electrical device. Background Technology

[0002] In practical applications, in order to meet the demand for high power output and increase the overall capacity of the battery, multiple battery packs are usually connected to form a battery cluster to meet the usage requirements.

[0003] In the prior art, when assembling battery clusters, multiple battery packs need to be placed sequentially on the cluster frame in a vertical direction. At this time, the cluster frame needs to be equipped with bottom support brackets at intervals in the vertical direction to support the battery packs. In addition, in order to facilitate the assembly of battery packs onto the cluster frame, the cluster frame also needs to leave an assembly gap in the width direction.

[0004] However, in actual use, the above structure requires the battery pack to be equipped with structures such as liquid cooling plates for heat dissipation and cooling. The stacking of the liquid cooling plate structure and the bottom support bracket results in a large overall size of the battery cluster in the vertical direction. The assembly gap in the width direction also results in a large overall size of the battery cluster in the width direction. Ultimately, this leads to a large overall volume of the battery cluster and low space utilization, which not only affects the overall energy density of the battery cluster, but also increases the overall cost of the battery cluster. Utility Model Content

[0005] The purpose of this application is to provide a battery pack, battery cluster, and electrical device, which can solve the problem that the low overall space utilization rate of the battery cluster during assembly in the prior art leads to low overall energy density and high cost.

[0006] To achieve the above objectives, in a first aspect, this application provides a battery pack comprising battery cells, a housing, and a support frame. The housing includes a liquid cooling plate and a cover, with the battery cells disposed on the liquid cooling plate and the cover covering the liquid cooling plate to encapsulate the battery cells. The support frame is a frame structure, and the housing is disposed within the support frame. The liquid cooling plate is fixedly connected to the support frame to secure the housing within the support frame.

[0007] Based on the embodiments described above, the support frame and the battery housing are integrated to form a battery pack structure. When the battery packs are stacked to form a battery cluster, the support frame abuts against them sequentially for load-bearing. Simultaneously, during the housing setup of the battery pack, a liquid cooling plate cooperates with the housing cover to form the housing structure, with the battery cells housed inside. The liquid cooling plate is directly connected to the support frame, enabling the support frame to support the battery cells and the housing. In this case, the liquid cooling plate can both dissipate heat and cool the battery cells, and also achieve the same technical effect as the base support bracket on the cluster frame in the prior art, thereby eliminating the need for a base support bracket structure and reducing the size of the battery pack in the height direction. Especially when multiple battery packs are stacked to form a battery cluster, the elimination of the base support bracket that would normally be required under each battery pack significantly reduces the size of the battery cluster in the stacking direction and improves space utilization, thereby increasing the overall energy density of the battery cluster while reducing costs.

[0008] In some embodiments, the support frame includes a bottom frame, a top frame, and at least three columns, with the top frame disposed above the bottom frame and the at least three columns connected parallel to each other between the bottom frame and the top frame.

[0009] Based on the embodiments described above, the support frame integrated into the battery pack primarily serves to provide support when the battery packs are stacked. In this case, the support frames abut against each other, achieving a similar technical effect to the cluster frame in the prior art. During stacking, the bottom frame of the upper battery pack and the top frame of the lower battery pack abut against each other for support in adjacent battery packs. Uprights are positioned between the top and bottom frames of the same battery pack for support. By providing at least three uprights, the support between the top and bottom frames becomes more stable.

[0010] In some embodiments, the liquid cooling plate includes a flow channel plate, a flow channel cavity is provided in the flow channel plate, and connecting blocks are provided on both sides of the flow channel plate, with the connecting blocks fixedly connected to the bottom frame.

[0011] Based on the above embodiments of this application, the flow channel plate is relatively thin and has low strength because it needs to be provided with a flow channel cavity. By setting the connecting block, not only can the overall strength of the liquid cooling plate be enhanced in a way similar to a reinforcing rib, but it can also prevent the flow channel plate from being directly assembled and fixed to the support frame during assembly. This can, to a certain extent, prevent damage to the flow channel cavity when the liquid cooling plate is connected to the support frame, thus affecting the heat dissipation and cooling effect of the liquid cooling plate.

[0012] In some embodiments, connecting plates are provided on both sides of the flow channel plate, the connecting plates are arranged perpendicular to the flow channel plate, and when the housing is placed inside the support frame, the connecting plates face the top frame. A connecting block is connected to the end of the connecting plate away from the flow channel plate, and the connecting block is arranged perpendicular to the connecting plate. The connecting block is connected to the upper surface of the bottom frame.

[0013] Based on the embodiments described above, by providing a connecting plate that connects the connecting block and the flow channel plate, the flow channel plate, connecting plate, and connecting block together form a Z-shaped structure. This Z-shaped structure ensures that while the connecting block is connected to the upper surface of the bottom frame, the upper surface of the flow channel plate is lower than the upper surface of the bottom frame. Since the direction of gravity for the battery pack during installation is from the top frame to the bottom frame, connecting the connecting block to the upper surface of the bottom frame allows the bottom frame to support the connecting block and the liquid cooling plate from below, resulting in more stable support for the connecting block and the liquid cooling plate. Furthermore, by setting the upper surface of the flow channel plate lower than the upper surface of the bottom frame, more space is provided for the battery cells and other structures, further improving the space utilization of the battery pack, increasing the overall energy density of the battery pack, and reducing costs.

[0014] In some embodiments, the connecting plate has a cavity structure, and the cavity structure is provided with reinforcing ribs.

[0015] Based on the embodiments described above, by creating a cavity structure within the connecting plate, the amount of material used can be reduced, lowering costs, and the overall weight of the liquid cooling plate and battery pack can also be reduced. Furthermore, the addition of reinforcing ribs enhances the strength of the connecting plate, ensuring the connection strength between the connecting plate and the flow channel plate and connecting block.

[0016] In some embodiments, a partition beam is provided on the liquid cooling plate, and the partition beam is fixedly connected to the liquid cooling plate.

[0017] Based on the embodiments described above, by setting a partition beam, on the one hand, it can achieve the same technical effect as the crossbeams and longitudinal beams in the prior art, dividing the receiving cavity space enclosed by the liquid cooling plate and the box cover to separate different receiving sub-cavities, facilitating the positioning and fixing of the battery cells. On the other hand, the setting of the partition beam can enhance the strength of the liquid cooling plate itself, enabling the liquid cooling plate to better support the battery cells and other structures, and to a certain extent preventing the liquid cooling plate from deforming under pressure.

[0018] In some embodiments, a flange is provided at the edge of the cover, and the flange is attached to and fixedly connected to the liquid cooling plate.

[0019] Based on the embodiments described above, the flange facilitates the connection between the casing cover and the liquid cooling plate. Simultaneously, it increases the contact area between the liquid cooling plate and the casing cover, thereby improving the sealing effect at the contact point and further enhancing the protection of the battery cells.

[0020] According to a second aspect of this application, a battery cluster is provided, the battery cluster comprising a plurality of the above-described battery packs, the plurality of battery packs being stacked sequentially, and support frames in any two adjacent battery packs abutting against each other.

[0021] Based on the above embodiments of this application, the battery cluster provided by this application includes the aforementioned battery pack. With the above arrangement, when the battery cluster is arranged in groups, multiple battery packs are stacked sequentially, and the support frames on the battery packs abut against each other sequentially. By fixing the liquid cooling plate to the support frame, the liquid cooling plate dissipates heat and cools the battery cells while replacing the base support bracket in the prior art, thereby improving the overall space utilization of the battery cluster and increasing the overall energy density of the battery cluster.

[0022] In some embodiments, the support frames in any two adjacent battery packs are connected and fixed by any one of welding, bolting and riveting.

[0023] Based on the embodiments described above, connecting two adjacent support frames using any of the above connection methods makes the support between the support frames more stable.

[0024] According to a third aspect of this application, an electrical device is provided, the electrical device including a device body and the aforementioned battery cluster, wherein a power supply cavity is provided in the device body and the battery cluster is disposed in the power supply cavity.

[0025] Based on the above embodiments of this application, the electrical equipment provided by this application includes the above-mentioned battery cluster, and therefore also has the above-mentioned beneficial effects. To avoid repetition, it will not be described again here.

[0026] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the battery pack provided in the embodiments of this application.

[0029] Figure 2 This is an exploded view of the battery pack provided in an embodiment of this application.

[0030] Figure 3 yes Figure 2 An enlarged schematic diagram of region A in the middle.

[0031] Figure 4 yes Figure 2 A magnified view of region B in the middle.

[0032] Figure 5 This is a schematic diagram of the structure of the battery cluster provided in the embodiments of this application.

[0033] Explanation of reference numerals in the attached figures

[0034] 1. Liquid cooling plate; 11. Flow channel plate; 12. Connecting block; 13. Connecting plate; 14. Reinforcing rib; 15. Separating beam; 2. Box cover; 21. Flanged edge; 3. Support frame; 31. Bottom frame; 32. Top frame; 33. Column. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0038] 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.

[0039] In the description of this application, it should be noted that, unless otherwise stated, the terms "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In existing technologies, when power batteries are used in specific applications, such as electric heavy trucks or mining trucks, they need to meet the requirements of large output power and large battery capacity. In this case, multiple battery packs are usually connected to form a battery cluster to meet the usage requirements.

[0042] In existing technologies, during battery cluster assembly, multiple battery packs are often stacked on a cluster frame. This requires multiple base supports on the frame to hold the battery packs, and internal structures such as liquid cooling plates are needed to dissipate heat and cool the cells. These liquid cooling plates are typically attached to the bottom of the cells. This stacked arrangement results in a large vertical dimension for the battery cluster, with a significant portion of that dimension occupied by the support structures, leaving little space for the cells and leading to low space utilization in the vertical direction. Furthermore, since the cluster frame is usually a single unit, a width gap is typically required to facilitate fitting the battery packs into the frame, further reducing the width space utilization. In summary, these factors contribute to low overall space utilization when using a cluster frame structure for battery clusters, negatively impacting the overall energy density of the battery cluster.

[0043] Furthermore, in other existing solutions, the cluster frame can be eliminated in some cases, with multiple battery packs stacked sequentially. In this scenario, the weight of the battery packs directly affects the lower packs, placing them under significant pressure. Therefore, the bottom pack's casing structure typically needs reinforcement, usually achieved by increasing the overall thickness of the casing. However, this not only increases the space occupied by the casing within the battery pack, reducing overall space utilization and affecting energy density, but also increases the overall weight and cost of the battery cluster.

[0044] To address the aforementioned problems in the prior art, a battery pack is provided according to a first aspect of this application. (Reference) Figure 1 and Figure 2As shown, the battery pack includes battery cells (not shown), a housing, and a support frame 3. The housing includes a liquid cooling plate 1 and a cover 2. The battery cells are mounted on the liquid cooling plate 1, and the cover 2 is placed on the liquid cooling plate 1 to encapsulate the battery cells. The support frame 3 is a frame structure, and the housing is housed within the support frame 3. The liquid cooling plate 1 is fixedly connected to the support frame 3 to secure the housing within the support frame 3.

[0045] Based on the embodiments described above, the support frame 3 is integrated with the battery housing to form a battery pack structure. When the battery packs are stacked to form a battery cluster, the support frame 3 sequentially abuts against and supports the load. Simultaneously, during the housing setup of the battery pack, the liquid cooling plate 1 and the housing cover 2 cooperate to form the housing structure, with the battery cells housed inside. The liquid cooling plate 1 is directly connected to the support frame 3, enabling the support frame 3 to support the battery cells and the housing. In this case, the liquid cooling plate 1 can both dissipate heat and cool the battery cells, and also achieve the same technical effect as the bottom support bracket on the cluster frame in the prior art, thereby eliminating the need for a bottom support bracket structure and reducing the size of the battery pack in the height direction. Especially when multiple battery packs are stacked to form a battery cluster, the elimination of the bottom support bracket that would normally be required under each battery pack significantly reduces the size of the battery cluster in the stacking direction and improves space utilization, thereby increasing the overall energy density of the battery cluster while reducing costs.

[0046] Specifically, in the assembly of the battery pack described above in this application, multiple battery cells can first be grouped and placed on the liquid cooling plate 1, with the cover 2 forming a cavity structure. Then, the cover 2 is placed on and fixed to the liquid cooling plate 1, thus encapsulating the battery cells. In this process, the liquid cooling plate 1 serves both as the base plate of the battery pack and as a cooling module for heat dissipation and cooling of the battery cells, thereby eliminating the need for the original battery pack base plate structure. This improves the space utilization of the battery pack and increases its energy density.

[0047] Subsequently, the support frame 3 is integrated and installed on the outside of the casing for support. At this point, the frame structure of the support frame 3 can be assembled separately according to the casing structure, thus eliminating the need for assembly gaps between the support frame 3 and the casing for easier assembly. This allows the support frame 3 to fit better with the casing, further improving the overall space utilization of the battery pack. Simultaneously, the support frame 3 can distribute the pressure on the casing portion of the battery pack, allowing for a thinner and lighter casing. Since the support frame 3 itself only needs to meet strength requirements, lower-cost materials such as steel can be used, thereby reducing the overall cost of the battery pack.

[0048] In this application, the support frame 3 can be configured as any suitable structure.

[0049] refer to Figure 2As shown in the exemplary embodiment provided in this application, the support frame 3 may include a bottom frame 31, a top frame 32 and at least three columns 33. The top frame 32 is disposed above the bottom frame 31, and the at least three columns 33 are connected in parallel between the bottom frame 31 and the top frame 32.

[0050] Based on the embodiments described above, the support frame 3, when integrated onto the battery pack, primarily serves to provide support when the battery packs are stacked. In this case, the support frames 3 abut against each other, achieving a similar technical effect to the cluster frame in the prior art. During stacking, the bottom frame 31 of the upper battery pack and the top frame 32 of the lower battery pack abut against each other for support in two adjacent battery packs. The uprights 33 are positioned between the top frame 32 and the bottom frame 31 of the same battery pack for support. By providing at least three uprights 33, the support between the top frame 32 and the bottom frame 31 becomes more stable.

[0051] Specifically, in some embodiments of this application, the specific shapes of the bottom frame 31 and the top frame 32 can be set according to the shape of the housing, specifically, they can be set as triangles, rectangles, or other irregular structures. For example, when the battery cells inside the battery pack and the housing as a whole are both set as rectangular structures, the top frame 32 and the bottom frame 31 can be set as rectangular structures accordingly, and the top frame 32 and the bottom frame 31 are set to the same size so that the top frame 32 and the bottom frame 31 in adjacent battery packs can better abut and support each other when multiple battery packs are stacked.

[0052] Subsequently, the uprights 33 are connected between the top frame 32 and the bottom frame 31. The number of uprights 33 can be set according to factors such as the weight of the battery pack and the number of stacked layers. For example, when both the top frame 32 and the bottom frame 31 are rectangular, the four corners of the top frame 32 and the bottom frame 31 can be connected first using uprights 33. Then, the number of uprights 33 between the top frame 32 and the bottom frame 31 can be increased as needed to meet strength requirements. At the same time, in specific settings, the number of uprights 33 on both sides of the enclosure should be consistent to ensure more uniform strength of the support frame 3 on both sides of the enclosure, preventing shifting to one side when the support is applied.

[0053] When assembling the support frame 3 with the housing, the bottom frame 31 can be assembled with the housing first. At this time, the liquid cooling plate 1 is fixed to the bottom frame 31. Then, the column 33 and the top frame 32 are fixed in sequence by welding or bolting. At this time, no assembly gap needs to be left between the support frame 3 and the housing, thereby improving the overall space utilization of the battery pack.

[0054] Furthermore, in some embodiments of this application, the top frame 32, bottom frame 31, and column 33 can be configured with any suitable structure. For example, when the support frame 3 is made entirely of steel, the top frame 32, bottom frame 31, and column 33 can all be configured as hollow steel pipe structures. Meanwhile, when the battery packs in this application are stacked, the top frame 32 and bottom frame 31 experience different force directions than the column 33. The top frame 32 and bottom frame 31 are mainly subjected to pressure along the thickness direction, while the column 33 is subjected to pressure along the axial direction. Therefore, the top frame 32 and bottom frame 31 can be configured with different structures and materials than the column 33 to meet different strength requirements. The specific choice can be made according to the actual situation, and this application does not impose any specific limitations on this.

[0055] In this application, the liquid cooling plate 1 can also be configured with any suitable structure.

[0056] refer to Figure 2 and Figure 3 As shown in the exemplary embodiment provided in this application, the liquid cooling plate 1 may include a flow channel plate 11, a flow channel cavity is provided in the flow channel plate 11, and connecting blocks 12 are provided on both sides of the flow channel plate 11, and the connecting blocks 12 are fixedly connected to the bottom frame 31.

[0057] Based on the above embodiments of this application, the flow channel plate 11 is relatively thin and has low strength because it needs to have a flow channel cavity. By setting the connecting block 12, the overall strength of the liquid cooling plate 1 can be enhanced in a manner similar to a reinforcing rib. At the same time, it can also prevent the flow channel plate 11 from being directly assembled and fixed to the support frame 3 during assembly, thereby avoiding damage to the flow channel cavity and affecting the heat dissipation and cooling effect of the liquid cooling plate 1 when the liquid cooling plate 1 is connected to the support frame 3.

[0058] Specifically, when the liquid cooling plate 1 is in use, the battery cell is directly placed above the flow channel plate 11 and in contact with the flow channel plate 11. The coolant circulating in the flow channel cavity carries away the heat dissipated by the battery cell through heat conduction, thereby achieving heat dissipation and cooling of the battery cell.

[0059] refer to Figure 3 As shown in some embodiments of this application, connecting plates 13 may also be provided on both sides of the flow channel plate 11. The connecting plates 13 are arranged perpendicular to the flow channel plate 11, and when the housing is set inside the support frame 3, the connecting plates 13 are arranged facing the top frame 32. A connecting block 12 is connected to the end of the connecting plate 13 away from the flow channel plate 11, and the connecting block 12 is arranged perpendicular to the connecting plate 13. The connecting block 12 is connected to the upper surface of the bottom frame 31.

[0060] Based on the above embodiments of this application, by setting a connecting plate 13, which connects the connecting block 12 and the flow channel plate 11, the flow channel plate 11, the connecting plate 13, and the connecting block 12 together form a Z-shaped structure. This Z-shaped structure ensures that the connecting block 12 is connected to the upper surface of the bottom frame 31 while the upper surface of the flow channel plate 11 is lower than the upper surface of the bottom frame 31. At this time, the direction of gravity of the battery pack during installation is from the top frame 32 to the bottom frame 31. Therefore, by connecting the connecting block 12 to the upper surface of the bottom frame 31, the bottom frame 31 can support the connecting block 12 and the liquid cooling plate 1 from below, thus making the support effect of the support frame 3 on the connecting block 12 and the liquid cooling plate 1 more stable. Simultaneously, by setting the upper surface of the flow channel plate 11 to be lower than the upper surface of the bottom frame 31, more space can be provided for structures such as battery cells, thereby further improving the space utilization rate of the battery pack, increasing the overall energy density of the battery pack, and reducing costs.

[0061] Specifically, when the liquid cooling plate 1 is installed, the connecting block 12 is connected to the upper surface of the bottom frame 31. At this time, the bottom frame 31 supports the connecting block 12 and the liquid cooling plate 1 as a whole. Compared with connecting to the side or bottom of the bottom frame 31, the support effect is more stable. Subsequently, the connecting block 12 and the bottom frame 31 can be fixed by bolts or welding to further improve the stability of the support. At the same time, the Z-shaped structure formed by the flow channel plate 11, the connecting plate 13, and the connecting block 12 allows the connecting plate 13 and the flow channel plate 11 to fit snugly into the bottom frame 31, reducing the possibility of horizontal movement of the liquid cooling plate 1 and making the fixation between the housing and the support frame 3 more stable.

[0062] When the upper surface of the flow channel plate 11 is lower than the upper surface of the bottom frame 31, the flow channel plate 11 forms a recessed structure relative to the connecting block 12, which can provide more space for the battery cell and other structures, thereby improving space utilization and increasing the overall energy density of the battery pack.

[0063] Furthermore, in this application, the flow channel plate 11, connecting plate 13, and connecting block 12 can be integrally formed. This not only improves processing efficiency but also prevents damage to the internal flow channel cavity when the flow channel plate 11 is connected to the connecting plate 13. Alternatively, they can be set separately and then connected by welding or other methods. In this case, the structure of the connecting plate 13 and connecting block 12 can be set according to the specific structural dimensions of the support frame 3, making it more flexible to use.

[0064] refer to Figure 3 As shown in some embodiments of this application, the connecting plate 13 may have a cavity structure, and a reinforcing rib 14 is provided in the cavity structure.

[0065] Based on the embodiments described above, by creating a cavity structure within the connecting plate 13, the amount of material used can be reduced, lowering costs, and also reducing the overall weight of the liquid cooling plate 1 and the battery pack. The reinforcing ribs 14 enhance the strength of the connecting plate 13, ensuring the connection strength between the connecting plate 13 and the flow channel plate 11 and the connecting block 12.

[0066] Specifically, in this application, when the liquid cooling plate 1 is fixed to the bottom frame 31, the connecting plate 13 is disposed between the flow channel plate 11 and the connecting block 12. At this time, the force direction of the connecting plate 13 is from the flow channel plate 11 to the connecting block 12, that is, the force direction of the connecting plate 13 is consistent with the battery pack stacking direction. Therefore, when the reinforcing rib 14 is provided in the cavity structure, the setting direction of the reinforcing rib 14 can be consistent with the stacking direction or set at a certain angle to the stacking direction, so as to better strengthen the strength of the connecting plate 13 under the stress condition.

[0067] refer to Figure 2 As shown in some embodiments of this application, a partition beam 15 may also be provided on the liquid cooling plate 1, and the partition beam 15 is fixedly connected to the liquid cooling plate 1.

[0068] Based on the above embodiments of this application, by setting the partition beam 15, on the one hand, it can achieve the same technical effect as the crossbeam and longitudinal beam in the prior art, dividing the accommodating cavity space jointly enclosed by the liquid cooling plate 1 and the box cover 2 to separate different accommodating sub-cavities, which facilitates the positioning and fixing of the battery cells. On the other hand, the setting of the partition beam 15 can enhance the strength of the liquid cooling plate 1 itself, so that the liquid cooling plate 1 can better support the battery cells and other structures, and to a certain extent avoid the liquid cooling plate 1 from being deformed under pressure.

[0069] Specifically, during battery pack assembly, multiple cells are typically grouped together to form cell modules, and then one or more cell modules are connected and placed within the same battery pack. In this case, the partition beam 15 divides the liquid cooling plate 1 into multiple areas, facilitating the fixed assembly of the cell modules. Simultaneously, when reinforcing the liquid cooling plate 1 with the partition beam 15, for example, when the partition beam 15 is positioned along the length of the liquid cooling plate 1, its length can be consistent with the length of the liquid cooling plate 1, thus reinforcing the entire length of the liquid cooling plate 1 after the partition beam 15 is fixed.

[0070] Furthermore, in this application, the liquid cooling plate 1 typically requires the installation of a corresponding coolant circulation pipeline, as shown in the reference. Figure 2 and Figure 3 As shown in the figure, an inlet and an outlet can be opened at the end of the liquid cooling plate 1 to connect with the circulation pipeline and realize the circulation flow of coolant in the liquid cooling plate 1.

[0071] refer to Figure 4 As shown in some embodiments of this application, a flange 21 may also be provided at the edge of the cover 2, and the flange 21 is attached to the liquid cooling plate 1 and fixedly connected to the liquid cooling plate 1.

[0072] Based on the above embodiments of this application, the flange 21 facilitates the connection between the cover 2 and the liquid cooling plate 1. Simultaneously, it increases the contact area between the liquid cooling plate 1 and the cover 2, thereby improving the sealing effect at the contact point between the cover 2 and the liquid cooling plate 1, and further enhancing the protection of the battery cells.

[0073] Specifically, during assembly, the weight of the battery cells in this application acts directly on the liquid cooling plate 1, and is then transferred to the support frame 3 via the connection between the liquid cooling plate 1 and the support frame 3. When multiple battery packs are stacked, the pressure on the support frame 3 is transferred to the other support frame 3 below. Based on this, the pressure on the cover 2 in the battery pack structure of this application is relatively small, so the cover 2 can be made relatively thin and light. In specific design, the cover 2 structure can be formed by stamping and bending a metal sheet, and the flange 21 can also be integrally formed with the cover 2 by bending or other methods.

[0074] Furthermore, when fixing the cover 2 to the liquid cooling plate 1, the flange 21 can be fixed to the liquid cooling plate 1 by means of bolt connection, riveting or welding. The specific method can be set according to the connection strength requirements and sealing requirements, etc. This application does not impose specific restrictions on this.

[0075] Furthermore, it should be noted that the battery pack in this application is not limited to the above structure. In actual production and assembly, the battery pack may also be equipped with various structures such as integrated busbars and temperature measurement modules. The specific configuration can be determined according to factors such as the actual application conditions of the battery pack, and this application does not impose any specific restrictions on this.

[0076] Based on the above technical solution, according to the second aspect of this application, a battery cluster is provided, with reference to... Figure 5 As shown, the battery cluster includes multiple battery packs as described above, which are stacked sequentially, and the support frame 3 in any two adjacent battery packs abuts against each other.

[0077] Based on the above embodiments of this application, the battery cluster provided by this application includes the aforementioned battery pack. With the above arrangement, when the battery cluster is arranged in groups, multiple battery packs are stacked sequentially, and the support frames 3 on the battery packs sequentially abut against and support each other. By fixing the liquid cooling plate 1 to the support frame 3, the liquid cooling plate 1 dissipates heat and cools the battery cells while replacing the base support bracket in the prior art, thereby improving the overall space utilization of the battery cluster and increasing the overall energy density of the battery cluster.

[0078] Specifically, during the battery cluster assembly process, multiple battery packs are stacked together. The battery packs can be connected via high and low voltage wiring harnesses or similar structures to achieve overall input and output control. Furthermore, the specific number of battery packs can be set based on factors such as the specific output power and capacity requirements of the battery cluster; this application does not impose specific limitations in this regard.

[0079] Furthermore, when multiple battery packs are stacked, to ensure that the weight of the battery packs is supported and transferred through the support frame 3, rather than directly acting on the casing, a gap must be maintained between the casing sections of adjacent battery packs during stacking. Specifically, a gap must be maintained between the bottom surface of the liquid cooling plate 1 of the upper battery pack and the top surface of the casing cover 2 of the lower battery pack. In this case, the weight of the upper battery pack can only be transferred to the lower one through the abutment between the two adjacent support frames 3, and cannot be directly transferred to the lower casing. Under these circumstances, the overall casing can be made relatively thin and light, which not only saves materials and reduces costs, but also improves the space utilization of the battery packs and battery clusters as a whole, and increases the overall energy density of the battery clusters.

[0080] Meanwhile, when multiple battery packs are stacked to form a battery cluster structure, the bottom of the other battery packs, except for the bottommost single battery pack, is less likely to be impacted. Therefore, using the liquid cooling plate 1 as the bottom plate of the casing and making the casing relatively thin and light can usually meet the protection requirements for the battery cells. In this case, the bottom protection of the bottommost battery pack can be improved by separately installing a bottom guard plate on the bottom of the bottommost single battery pack.

[0081] In addition, further references can be made. Figure 5 As shown in the illustration, this application only provides a specific embodiment of multiple battery packs stacked sequentially to form a single-row battery cluster. In practical applications, depending on the space of the application environment, multiple rows of parallel battery clusters can also be arranged vertically. The multiple rows of battery clusters can be fixed together by the interconnection of the support frame 3. The specific arrangement and connection method can be set according to the specific application environment of the battery clusters, and this application does not impose specific limitations on this.

[0082] In some embodiments of this application, the support frames 3 in any two adjacent battery packs are connected and fixed by any one of welding, bolting and riveting.

[0083] Based on the above embodiments of this application, two adjacent support frames 3 can be connected by any of the above connection methods, making the support between the support frames 3 more stable.

[0084] Specifically, taking the support frame 3 as an example, which is an overall steel tubular structure. When two adjacent support frames 3 are connected by welding, the connection method is simple and the connection strength is high. When fixed by riveting, the rivets directly pass through the bottom frame 31 of the upper support frame 3 and the top frame 32 of the lower support frame 3 to fix the two support frames 3. Therefore, compared with the welding connection method where only the contact surfaces of the two are fixed, the structure of the support frame 3 after this connection has a better resistance to horizontal shaking and lateral bending forces. When fixed by bolting, the bolts also need to pass through the bottom frame 31 of the upper support frame 3 and the top frame 32 of the lower support frame 3 to fix the two support frames 3. Therefore, the overall connection strength is high, and the bolt connection is simpler to fix than the riveting connection process, and can be disassembled and re-fixed at any time as needed. The specific connection method can be set according to factors such as connection strength requirements, and this application does not impose specific restrictions on it.

[0085] Furthermore, it should be noted that the battery cluster in this application is not limited to the above structure. In specific applications, various structures, including a Battery Management System (BMS), can be set up to achieve multiple functions such as regulation of the battery cluster and overload protection. The specific structure can be set according to the functional requirements of the battery cluster, and this application does not impose specific restrictions on it.

[0086] Based on the above technical solution, according to the third aspect of this application, an electrical device is provided, which includes a device body and the aforementioned battery cluster, wherein a power supply cavity is provided in the device body and the battery cluster is disposed in the power supply cavity.

[0087] Specifically, in this application, the electrical equipment can be, but is 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., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0088] Based on the above embodiments of this application, the electrical equipment provided by this application includes the above-mentioned battery cluster, and therefore also has the above-mentioned beneficial effects. To avoid repetition, it will not be described again here.

[0089] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0090] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0091] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

Claims

1. A battery pack, characterized by, The battery pack comprises: a battery cell; a box body comprising a liquid cooling plate and a box cover, the battery cell being arranged on the liquid cooling plate, and the box cover being arranged on the liquid cooling plate to encapsulate the battery cell; a support frame arranged in a frame structure, and the box body being arranged in the support frame; wherein the liquid cooling plate is fixedly connected with the support frame to fix the box body in the support frame.

2. The battery pack of claim 1, wherein, The support frame comprises a bottom frame, a top frame and at least three vertical columns, the top frame being arranged above the bottom frame, and the at least three vertical columns being connected in parallel with each other between the bottom frame and the top frame.

3. The battery pack of claim 2, wherein, The liquid cooling plate comprises a flow channel plate, a flow channel cavity being arranged in the flow channel plate, and connecting blocks being arranged on both sides of the flow channel plate, the connecting blocks being fixedly connected with the bottom frame.

4. The battery pack of claim 3, wherein, Connecting plates are arranged on both sides of the flow channel plate, the connecting plates being arranged in a direction perpendicular to the flow channel plate, and the connecting plates being arranged towards the top frame when the box body is arranged in the support frame, the connecting blocks being connected to one end of the connecting plates away from the flow channel plate, and the connecting blocks being arranged in a direction perpendicular to the connecting plates; The connecting blocks are connected to the upper surface of the bottom frame.

5. The battery pack of claim 4, wherein, A cavity structure is formed in the connecting plates, and reinforcing ribs are arranged in the cavity structure.

6. The battery pack of claim 1, wherein, A partition beam is arranged on the liquid cooling plate, and the partition beam is fixedly connected with the liquid cooling plate.

7. The battery pack of claim 1, wherein, A turned-up edge is arranged at the edge of the box cover, the turned-up edge being attached to the liquid cooling plate and fixedly connected with the liquid cooling plate.

8. A battery cluster, characterized by The battery cluster comprises a plurality of battery packs as claimed in any one of claims 1-7, the plurality of battery packs being stacked in sequence, and the support frames in any two adjacent battery packs abutting and supporting each other.

9. The battery cluster of claim 8, wherein, The support frames in any two adjacent battery packs are connected and fixed by any one of welding, bolt connection and riveting.

10. An electric device, characterized by The power utilization device comprises: a device main body, a power supply cavity being formed in the device main body; and the battery cluster as claimed in claim 8 or 9, the battery cluster being arranged in the power supply cavity.

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