Battery packs and electrical equipment

Abstract

This utility model provides a battery pack and an electrical device. The battery pack includes a cell module with a top surface and a bottom surface facing each other along the height direction of the cell module. The cell module includes multiple cells, each cell having a first end surface and a second end surface facing each other along the height direction of the cell. The cell module includes at least one row of multiple cells, with adjacent cells in the same row comprising a first cell and a second cell. The first end surface of the first cell faces the top surface of the module, and the first end surface of the second cell faces the bottom surface of the module. This battery pack can improve the technical problem of difficult welding of multiple cells.

Description

[0001] This application claims priority to Chinese Patent Application No. 202521409754.2, filed on July 4, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of battery technology, specifically to a battery pack and electrical equipment. Background Technology

[0003] In related technologies, battery packs include multiple cylindrical cells. When multiple cylindrical cells have small outer diameters and are welded on the same side, the close arrangement of multiple cylindrical cells makes welding more difficult and results in a lower welding yield. Utility Model Content

[0004] The present invention provides a battery pack and electrical equipment that can improve the technical problem of difficult welding of multiple battery cells in a battery pack.

[0005] In a first aspect, embodiments of the present invention provide a battery pack, comprising: a cell module having a top surface and a bottom surface of the module facing each other along the height direction of the cell module, the cell module comprising a plurality of cells, each cell having a first end surface and a second end surface facing each other along the height direction of the cell; wherein the cell module comprises at least one row of the plurality of cells, two adjacent cells in the same row comprising a first cell and a second cell, the first end surface of the first cell facing the top surface of the module, and the first end surface of the second cell facing the bottom surface of the module.

[0006] In one embodiment, the battery pack further includes a fixing frame, within which a plurality of the battery cells are fixed.

[0007] In one embodiment, a plurality of the battery cells are fixed within the fixing frame by potting compound.

[0008] In one embodiment, the fixing frame includes a base plate, the base plate is provided with a plurality of fixing platforms, the fixing platforms are protruding relative to the base plate, and each first battery cell is fixed on one of the fixing platforms.

[0009] In one embodiment, the first end face of the second battery cell is further provided with an explosion-proof structure, and a first pressure relief space is formed between the first end face of the second battery cell and the base plate.

[0010] In one embodiment, the second end face of the first battery cell is fixed to the fixed platform, and the first end face of the first battery cell is also provided with an explosion-proof structure, forming a second pressure relief space between the first end face of the first battery cell and the housing of the battery pack.

[0011] In one embodiment, the outer diameter of the fixing platform is set to be greater than or equal to the outer diameter of the battery cell; and / or, the height of the fixing platform is set to 10mm to 15mm.

[0012] In one embodiment, the battery pack further includes a plurality of cooling plates, each of which is located between two adjacent rows of battery cells.

[0013] In one embodiment, the battery pack further includes a first cooling pipe assembly and a second cooling pipe assembly, the first cooling pipe assembly and the second cooling pipe assembly being located on both sides of the plurality of cooling plates respectively, and two adjacent cooling plates including a first cooling plate and a second cooling plate, the first cooling plate being connected to the first cooling pipe assembly, and the second cooling plate being connected to the second cooling pipe assembly.

[0014] In one embodiment, both the first cooling pipe assembly and the second cooling pipe assembly include a plurality of manifolds, one end of the first cooling plate is connected to one of the manifolds of the first cooling pipe assembly; and / or, one end of the second cooling plate is connected to one of the manifolds of the second cooling pipe assembly.

[0015] In one embodiment, both the first cooling pipe assembly and the second cooling pipe assembly include an inlet pipe and an outlet pipe, and each of the manifolds is connected to the inlet pipe and the outlet pipe.

[0016] In one embodiment, the inlet pipe and the outlet pipe are arranged at intervals along the height direction of the battery cell module.

[0017] In one embodiment, the height of the battery cell is greater than the outer diameter of the battery cell.

[0018] Secondly, embodiments of this utility model also provide an electrical device, which includes the aforementioned battery pack.

[0019] The beneficial effects of the embodiments of this utility model are as follows:

[0020] In the embodiments of this utility model, by having the first end face of the adjacent first battery cell located in the same row face the top surface of the module and the first end face of the second battery cell face the bottom surface of the module, that is, by having the adjacent two battery cells arranged in opposite directions, the polarity of the ends of the adjacent two battery cells in the same row is different, so that the adjacent two battery cells in the same row can be welded on the top surface and the bottom surface of the module respectively, thereby increasing the welding operation area of ​​the battery cells, reducing the welding difficulty, and improving the welding yield. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a three-dimensional schematic diagram of the battery cell module provided in an embodiment of this utility model;

[0023] Figure 2 This is an exploded structural diagram of the battery cell module provided in an embodiment of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the battery cell provided in an embodiment of this utility model;

[0025] Figure 4 This is a three-dimensional structural diagram of the fixing frame provided in an embodiment of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the cooling system and multiple battery cells provided in an embodiment of the present invention.

[0027] Figure 6 This is a top view of the cooling system provided in an embodiment of the present invention.

[0028] Figure 7 This is a perspective view of the current collector provided in an embodiment of this utility model.

[0029] Icon labels:

[0030] 1. Battery cell module; 11. Top surface of the module; 12. Bottom surface of the module;

[0031] 2. Battery cell; 201. First battery cell; 202. Second battery cell; 21. First end face; 22. Second end face; 23. Positive electrode; 24. Negative electrode; 25. Explosion-proof structure; 26. Boss;

[0032] 3. Fixing frame; 31. Base plate; 32. Side plate; 33. Mounting part; 34. Mounting hole; 35. Fixing platform;

[0033] 4. Potting compound;

[0034] 5. Cooling plate; 51. First end; 52. Second end; 53. First cooling plate; 54. Second cooling plate;

[0035] 6. Cooling pipe assembly; 601. First set of cooling pipe assembly; 602. Second set of cooling pipe assembly; 61. Inlet pipe; 62. Outlet pipe; 63. Manifold; 631. Inlet pipe connection port; 632. Outlet pipe connection port; Detailed Implementation

[0036] 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.

[0037] In related technologies, battery packs include multiple cylindrical cells. When multiple cylindrical cells are welded on the same side, the close arrangement of the multiple cylindrical cells makes welding more difficult and results in a lower welding yield.

[0038] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, the battery pack includes a housing (not shown) and at least one cell module 1, with the at least one cell module 1 located inside the housing. The battery pack can be a power battery pack or an energy storage battery pack.

[0039] The battery cell module 1 has a top surface 11 and a bottom surface 12 that are opposite each other along the height direction of the battery cell module 1, wherein the height direction of the battery cell module 1 is as follows: Figure 1 In the z-direction shown, the cell module 1 includes multiple rows of cells 2, and each row of cells includes multiple cells 2.

[0040] The battery cell can be either a prismatic cell or a cylindrical cell. Taking a cylindrical cell as an example... Figure 3 As shown, the battery cell 2 includes a steel-cased battery cell. The battery cell 2 has a first end face 21 and a second end face 22 opposite to each other along the height direction of the battery cell 2. The first end face 21 is set as the positive electrode 23 of the battery cell 2, and the second end face 22 is set as the negative electrode 24 of the battery cell 2. The battery cell 2 also includes an explosion-proof structure 25. The first end face 21 is provided with a boss 26, and the explosion-proof structure 25 includes a pressure relief hole provided on the boss 26.

[0041] Continue to refer to Figure 1 and Figure 2Each row of cells 2 includes multiple cells 2 arranged along the length of the cell module 1, and the multiple rows of cells are spaced apart along the width of the cell module 1. The height of the cells is the same as the height of the cell module. Figure 1 As shown, the length direction of the battery cell module is the x-direction, the width direction is the y-direction, and the height direction is the z-direction.

[0042] Among them, the two adjacent cells in the same row are arranged in different directions. The two adjacent cells 2 in the same row include a first cell 201 and a second cell 202. The first end face 21 of the first cell 201 is close to the top end face 11 of the module, and the first end face 21 of the second cell 202 is close to the bottom end face 12 of the module.

[0043] Understandably, when multiple battery cells in the same row are arranged in the same direction, and the polarity of the first and second end faces of the multiple battery cells in the same row is the same, so that the same side of the multiple battery cells in the same row needs to be welded to the busbar, when the size of the battery cells is small and they are arranged closely together, for example, when the outer diameter of the battery cells is set to 21mm to 33mm, the operating area available for welding on the end face of each battery cell is small, which will increase the welding difficulty and affect the welding quality. However, in the embodiments of this application, since the arrangement directions of two adjacent battery cells in the same row are different, the first end face of one of the two adjacent battery cells in the same row is upward and the first end face of the other of the two adjacent battery cells in the same row is downward, so that the polarity of the ends of the two adjacent battery cells in the same row is different. This allows the two adjacent battery cells in the same row to be welded on the top end face 11 and the bottom end face 12 of the module, respectively, thereby increasing the welding operating area of ​​the battery cells, reducing the welding difficulty, and improving the welding yield.

[0044] In some embodiments, the height direction of the battery cell 2 is the same as the height direction of the battery cell module 1. In the embodiments of this application, the outer diameter of the battery cell 2 is smaller than the height of the battery cell 2. For example, the model of the battery cell 2 is 21700, the outer diameter of the battery cell 2 is 21mm, and the height of the battery cell 2 is 70mm. By aligning the height direction of the battery cell 2 with the height direction of the battery cell module 1, the space occupied in the Y direction of the battery cell module 1 is reduced.

[0045] In one embodiment, the outer diameter of the cell 2 is set to be between 21mm and 33mm. For example, the outer diameter of the cell 2 can be 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, or any value between any two of the above values, or a range between any two of the above values. Cylindrical cells 2 within the above outer diameter range can be referred to as small cylindrical cells. A battery pack formed by combining multiple small cylindrical cells 2 is suitable for providing power to HEVs (Hybrid Electric Vehicles) and PHEVs (Plug-in Hybrid Electric Vehicles) with a power consumption of 1 kWh to 8 kWh.

[0046] The adjacent rows of cells 2 are staggered so that multiple cells 2 are arranged in a honeycomb staggered pattern, which is beneficial to optimize energy density and take into account heat dissipation and structural requirements.

[0047] In some embodiments, such as Figure 1 and Figure 2 As shown, the battery pack includes a housing and multiple cell modules 1 disposed within the housing. Each cell module 1 includes multiple cells 2 and a fixing frame 3 for accommodating the multiple cells 2. The multiple cells 2 are fixed within the fixing frame 3 using potting compound 4, which can significantly reduce the number of support structures in the overall battery pack and facilitate the lightweight design of the battery pack.

[0048] In some embodiments, such as Figure 2 and Figure 4 As shown, the fixing frame 3 includes a base plate 31 and multiple side plates 32. One end of each side plate 32 is connected to the base plate 31, and the other end of each side plate 32 is open. The base plate 31 and the multiple side plates 32 enclose a battery cavity with one open end, and multiple battery cells 2 are housed within the battery cavity. The base plate 31 of the fixing frame 3 is bonded to the battery pack housing. Multiple mounting portions 33 are also provided on the side plates 32 of the fixing frame 3. Each mounting portion 33 is a boss structure that protrudes relative to the side plate 32. Each mounting portion 33 is provided with mounting holes 34. Multiple mounting portions 33 of the fixing frame 3 allow multiple bolts to pass through and be fixedly connected to the battery pack housing.

[0049] Continue to refer to Figures 1 to 4Multiple fixing platforms 35 are also provided on the base plate 31 of the fixing frame 3. The fixing platforms 35 protrude relative to the base plate 31, and each fixing platform 35 is configured to fix a first battery cell 201. The first battery cell 201 can be bonded to the fixing platform 35. When the second end face 22 of the first battery cell 201 is fixed on the fixing platform 35, since both the second end face 22 of the battery cell 201 and the top surface of the fixing platform 35 are set as planes, the second end face 22 of the first battery cell 201 is in full contact with the fixing platform 35 and remains fixed, thereby improving the fixing strength of the battery cell module 1.

[0050] In some embodiments, the base plate 31 of the fixing frame 3 is provided with a fixing platform 35 only corresponding to the first battery cell 201, and the base plate 31 of the fixing frame 3 is not provided with a fixing platform corresponding to the second battery cell 202, so that a part of the first pressure relief space is formed between the first end face 21 of the second battery cell 202 and the base plate 31, and another part of the first pressure relief space is also formed between the multiple fixing platforms 35, so that a large first pressure relief space is formed in the bottom space of the battery cell module 1 for the multiple second battery cells 202 to relieve pressure.

[0051] In some embodiments, a second pressure relief space is formed between the first end face 21 of the first cell 201 and the housing of the battery pack, so that the multiple first cells 201 can be depressurized through the second pressure relief space.

[0052] In the embodiments of this application, a first pressure relief space is formed at the bottom of the cell module 1 to allow multiple second cells 202 to release pressure, and a second pressure relief space is formed at the top of the cell module 1 to allow multiple first cells 201 to release pressure.

[0053] In some embodiments, the fixing platform 35 is configured as a cylindrical boss, and the outer diameter of the fixing platform 35 is equal to or slightly larger than the outer diameter of the battery cell 2, so that the second end face 22 is in full contact with the fixing platform 35 and provides sufficient support strength.

[0054] The height of the fixing platform 35 is set to 10mm to 15mm. In a specific embodiment, the height of the fixing platform 35 can be 10.0mm, 10.5mm, 11.0mm, 11.5mm, 12.0mm, 12.5mm, 13.0mm, 13.5mm, 14.0mm, 14.5mm, 15.0mm, or any value between any two of the above, or a range between any two of the above values. When the height of the fixing platform 35 is less than 10mm, the volume of the first pressure relief space formed by the first end face 21 and the base plate 31 is small when the first end face 21 abuts against the fixing platform 35, which is not conducive to the full pressure relief of the battery cell 2. When the height of the fixing platform 35 is greater than 15mm, the overall height of the battery cell module 1 is too large, which is not conducive to the miniaturization design of the battery pack and to improving the energy density of the battery pack.

[0055] like Figure 2 , Figures 5 to 7 As shown, the battery pack also includes a cooling system, which includes a cooling plate 5 and a cooling pipe assembly 6. The cooling plate 5 is used to cool the battery cell module 1, and the cooling pipe assembly 6 provides the cooling medium to the cooling plate 5 and diverts the circulating medium flowing out of the cooling plate 5 to the outside of the battery cell module 1.

[0056] In some embodiments, the cooling plates 5 include multiple cooling plates, each cooling plate 5 being located between two adjacent rows of battery cells. The cooling plates 5 are configured to contact the side of the battery cell 2 to cool the battery cell 2. When two adjacent rows of battery cells 2 are staggered, two adjacent cooling plates 5 are staggered to ensure sufficient contact and cooling with the multiple battery cells 2 in the corresponding row. When the battery cell 2 is a cylindrical battery cell, the cooling plates 5 are configured as serpentine cooling plates. The multiple cooling plates 5 include adjacent first cooling plates 53 and second cooling plates 54. Each cooling plate 5 has a first end 51 and a second end 52 opposite to each other along its length direction. The staggered arrangement of adjacent cooling plates 5 is understood to mean that, along the width direction of the battery cell module 1, the first cooling plate 53 and the second cooling plate 54 are not fully aligned, that is, the first end 51 of the first cooling plate 53 and the first end 51 of the second cooling plate 54 are not aligned, and the second end 52 of the first cooling plate 53 and the second end 52 of the second cooling plate 54 are not aligned.

[0057] In some embodiments, such as Figure 5 and Figure 6 As shown, the cooling pipe assembly 6 includes two sets, namely the first set of cooling pipe assembly 601 and the second set of cooling pipe assembly 602. The plurality of cooling plates 5 have a first end 51 and a second end 52 opposite to each other along their length direction. The first set of cooling pipe assembly 601 is located at the first end 51 of the plurality of cooling plates 5, and the second set of cooling pipe assembly 602 is located at the second end 52 of the plurality of cooling plates 5. Adjacent cooling plates 5 include a first cooling plate 53 and a second cooling plate 54. The first end 51 of the first cooling plate 53 is connected to the first set of cooling pipe assembly 601, and the second end 52 of the second cooling plate 54 is connected to the second set of cooling pipe assembly 602.

[0058] In some embodiments, such as Figures 5 to 7 As shown, both the first cooling pipe assembly 601 and the second cooling pipe assembly 602 include an inlet pipe 61, an outlet pipe 62, and multiple manifolds 63, with each manifold 63 connected to both the inlet pipe 61 and the outlet pipe 62. By connecting each manifold 63 of the cooling plate 5 to both the inlet pipe 61 and the outlet pipe 62, the piping structure of the cooling system is simplified, and assembly efficiency is improved.

[0059] Each manifold 63 is provided with an inlet pipe connection 631 and an outlet pipe connection 632. The inlet pipe connection 631 and the outlet pipe connection 632 are spaced apart along the height direction of the manifold 63. Both the inlet pipe connection 631 and the outlet pipe connection 632 are provided through the manifold 63. The inlet pipe 61 connects to multiple inlet pipe connections 631 of multiple manifolds 63, and the outlet pipe 62 connects to multiple outlet pipe connections 632 of multiple manifolds 63. A partition plate is also provided in the inner cavity of the manifold 63 to separate the cooling medium flowing in from the inlet pipe 61 and the cooling medium flowing in from the outlet pipe 62.

[0060] The first end 51 of the first cooling plate 53 is connected to the first group of cooling pipe assemblies 601. The second end 52 of the first cooling plate 53 is connected to a flow guide 7 to change the flow direction of the cooling medium. The first flow path of the cooling medium is as follows: liquid inlet pipe 61 of the first group of cooling pipe assemblies 601, flow collector 63, first cooling plate 53, flow guide 7, first cooling plate 53, flow collector 63, and liquid outlet pipe 62. The flow guide 7 is provided with a flow cavity with one open end, which changes the flow direction of the cooling medium in the first cooling plate 53.

[0061] The second end 52 of the second cooling plate 54 is connected to the second set of cooling pipe assemblies 602. The first end 51 of the second cooling plate 54 is connected to a flow guide 7 to change the flow direction of the cooling medium. That is, the second flow path of the cooling medium is as follows: liquid inlet pipe 61 of the second set of cooling pipe assemblies 602, flow collector 63, second cooling plate 54, flow guide 7, second cooling plate 54, flow collector 63, and liquid outlet pipe 62. The flow guide 7 is provided with a flow cavity with one open end, thereby changing the flow direction of the cooling medium in the second cooling plate 54.

[0062] By setting the flow path of the cooling medium, each cooling plate 5 is independently connected to the inlet pipe 61 and the outlet pipe 62 through the manifold 63, so that each cooling plate 5 can be independently temperature controlled, thereby improving the temperature uniformity of the entire cell module 1.

[0063] The cooling medium provided by the inlet pipe 61 is diverted through multiple manifolds 63 and enters the cooling plate 5 connected to each manifold 63 in sequence. The cooling medium in each cooling plate 5 enters the outlet pipe 62 through the corresponding manifold 63. The cooling medium flowing out of multiple cooling plates 5 is discharged through the same outlet pipe 62 by multiple manifolds 63.

[0064] In some embodiments, the inlet pipe 61 and the outlet pipe 62 are arranged at intervals along the height direction of the cell module 1, thereby reducing the space occupied by the cooling pipe assembly 6 in the Y direction of the cell module 1.

[0065] Multiple cooling plates 5 and two sets of cooling pipe assemblies 6 are all set inside the fixed frame 3.

[0066] In some embodiments, each cooling plate 5 is configured to be fixedly connected to multiple battery cells 2. The fixed connection between each cooling plate 5 and the battery cell 2 includes thermally conductive adhesive bonding, which improves heat exchange performance and also facilitates the fixation of multiple battery cells 2. Specifically, multiple first battery cells 201 and multiple second battery cells 202 are first fixed to multiple cooling plates 5, and then placed into the fixing frame 3 for fixation, so that the second end face 22 of multiple first battery cells 201 contacts multiple fixing platforms 35 one by one. Then, potting compound is filled into the gaps between multiple battery cells 2 and the gaps between the battery cell module 1 and the fixing frame 3 to achieve overall fixation of the battery cell module 1.

[0067] Understandably, if the battery cells 2 are grouped horizontally, meaning the height direction of the battery cells 2 is perpendicular to the height direction of the battery cell module 1, it is difficult to arrange the cooling system along the height direction of the battery cell module 1 when the outer diameter of the battery cells 2 is much smaller than its height. However, in the embodiments of this application, the battery cells 2 are grouped vertically, meaning the height direction of the battery cells 2 is the same as the height direction of the battery cell module 1. When the outer diameter of the battery cells 2 is much smaller than its height, it is easier to arrange the cooling pipe assembly 6 of the cooling system along the height direction of the battery cell module 1, and the occupancy of the cooling pipe assembly 6 in the Y direction of the battery cell module 1 is reduced.

[0068] Embodiments of this application also provide an electrical device, which includes a vehicle or an energy storage system. The vehicle may be a pure electric vehicle or a hybrid vehicle. The electrical device includes the battery pack provided in the above embodiments.

[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 in that, include: A battery cell module has a top surface and a bottom surface opposite each other along the height direction of the battery cell module. The battery cell module includes a plurality of battery cells, each of which has a first end surface and a second end surface opposite each other along the height direction of the battery cell. The battery cell module includes at least one row of multiple battery cells. Two adjacent battery cells in the same row include a first battery cell and a second battery cell. The first end face of the first battery cell faces the top surface of the module, and the first end face of the second battery cell faces the bottom surface of the module.

2. The battery pack according to claim 1, characterized in that, The battery pack also includes a fixing frame, and multiple battery cells are fixed within the fixing frame.

3. The battery pack according to claim 2, characterized in that, Multiple battery cells are fixed within the fixing frame using potting compound.

4. The battery pack according to claim 2, characterized in that, The fixing frame includes a base plate, and the base plate is provided with a plurality of fixing platforms. The fixing platforms are protruding relative to the base plate, and each first battery cell is fixed on one of the fixing platforms.

5. The battery pack according to claim 4, characterized in that, The first end face of the second battery cell is also provided with an explosion-proof structure, and a first pressure relief space is formed between the first end face of the second battery cell and the base plate.

6. The battery pack according to claim 4, characterized in that, The second end face of the first battery cell is fixed on the fixed platform, and the first end face of the first battery cell is also provided with an explosion-proof structure. A second pressure relief space is formed between the first end face of the first battery cell and the housing of the battery pack.

7. The battery pack according to claim 4, characterized in that, The outer diameter of the fixing platform is set to be greater than or equal to the outer diameter of the battery cell; and / or, the height of the fixing platform is set to 10mm to 15mm.

8. The battery pack according to claim 1, characterized in that, The battery pack also includes multiple cooling plates, each of which is located between two adjacent rows of battery cells.

9. The battery pack according to claim 8, characterized in that, The battery pack also includes a first cooling pipe assembly and a second cooling pipe assembly, which are located at both ends of the plurality of cooling plates respectively. Adjacent cooling plates include a first cooling plate and a second cooling plate. The first cooling plate is connected to the first cooling pipe assembly, and the second cooling plate is connected to the second cooling pipe assembly.

10. The battery pack according to claim 9, characterized in that, Both the first cooling pipe assembly and the second cooling pipe assembly include multiple manifolds, with one end of the first cooling plate connected to one of the manifolds of the first cooling pipe assembly; and / or, one end of the second cooling plate connected to one of the manifolds of the second cooling pipe assembly.

11. The battery pack according to claim 10, characterized in that, Both the first cooling pipe assembly and the second cooling pipe assembly include an inlet pipe and an outlet pipe, and each of the manifolds is connected to the inlet pipe and the outlet pipe.

12. The battery pack according to claim 11, characterized in that, The inlet pipe and the outlet pipe are arranged at intervals along the height direction of the battery cell module.

13. The battery pack according to claim 12, characterized in that, The battery cell includes a cylindrical battery cell, and the height of the battery cell is greater than the outer diameter of the battery cell.

14. An electrical appliance, characterized in that, The electrical equipment includes the battery pack as described in any one of claims 1 to 13.

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