Battery pack and electric device with same

Abstract

The utility model provides a kind of battery pack and the electric device with it, the battery pack includes: multiple square cell, each square cell has top surface, bottom surface, two first side and two second side, the area of first side is greater than the area of second side, multiple square cell is arranged in its length direction and forms battery column;Cooling piece has first cooling runner;Wherein, the junction of first side and top surface is first edge, the junction of first side and bottom surface is second edge, and first cooling runner is arranged at two first edge places and / or two second edge places, and first cooling runner extends along the arrangement direction of square cell.The technical scheme provided by the present application can solve the problem of poor heat dissipation effect of the battery pack in related art.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery pack and an electrical device having the same. Background Technology

[0002] In the field of battery technology, especially in battery packs used in electric vehicles and energy storage systems, heat dissipation components are one of the key components. They are used to control battery temperature and ensure that the battery operates within the optimal operating temperature range to improve battery efficiency, safety and lifespan.

[0003] In related technologies, heat dissipation components primarily dissipate heat by contacting one side of the battery to conduct heat generated by the battery. However, this heat dissipation method has significant limitations. In battery packs, batteries are typically arranged in a close-packed manner to maximize space utilization and energy density. In this arrangement, the large side surfaces of the batteries are in close contact with adjacent batteries, making it difficult to effectively dissipate the heat generated by the batteries, resulting in poor heat dissipation performance of the battery pack. Utility Model Content

[0004] This invention provides a battery pack and an electrical device having the same, to solve the problem of poor heat dissipation in battery packs in related technologies.

[0005] According to one aspect of the present invention, a battery pack is provided, comprising: a plurality of prismatic batteries, each prismatic battery having a top surface, a bottom surface, two first side surfaces and two second side surfaces, the area of ​​the first side surfaces being larger than the area of ​​the second side surfaces, the plurality of prismatic batteries being arranged in their length direction to form a battery array; a cooling component having a first cooling channel; wherein, the connection between the first side surface and the top surface is a first edge, the connection between the first side surface and the bottom surface is a second edge, and a first cooling channel is provided at the two first edges and / or the two second edges, the first cooling channel extending along the arrangement direction of the prismatic batteries.

[0006] According to another aspect of the present invention, an electrical device is provided, which includes a battery pack, the battery pack being the one provided above.

[0007] By applying the above technical solution, first cooling channels are fitted together at the two first edges and / or two second edges of the prismatic battery, extending along the arrangement direction of the prismatic battery. Utilizing the relatively concentrated heat within the battery at the edges, efficient heat dissipation is achieved, improving the heat dissipation effect of the battery pack. Therefore, the heat dissipation performance of the battery pack is significantly improved, the temperature distribution of the battery is more uniform, and the battery life is effectively extended. Attached Figure Description

[0008] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0009] Figure 1 A schematic diagram of the battery pack provided in an embodiment of the present invention is shown;

[0010] Figure 2 It shows Figure 1 A magnified view of a section at point A in the middle;

[0011] Figure 3 This diagram shows a structural schematic of the square-shell battery of the battery pack provided in an embodiment of the present invention;

[0012] Figure 4 This diagram shows a structural schematic of the cooling component of the battery pack provided in an embodiment of the present invention;

[0013] Figure 5 This diagram shows a structural schematic of the battery pack provided in an embodiment of the present invention from another perspective;

[0014] Figure 6 It shows Figure 5 A magnified view of a section at point B in the middle;

[0015] Figure 7 This diagram shows a structural schematic of the battery pack provided in an embodiment of the present invention from another perspective.

[0016] The above figures include the following reference numerals:

[0017] 10. Square-shaped battery; 11. Top surface; 12. Bottom surface; 13. First side surface; 14. Second side surface; 15. First edge; 16. Second edge; 17. Third edge; 18. Fourth edge;

[0018] 20. Battery array;

[0019] 30. Cooling component; 31. First cooling channel; 32. Top cold plate; 321. Pole post clearance hole; 33. Bottom cold plate; 331. Explosion-proof valve clearance hole; 34. Limiting part; 341. Flanged edge; 35. Connecting plate; 36. Flow channel strip; 37. Current collector; 38. First connecting pipe; 39. Second connecting pipe;

[0020] D. The thickness of the square-shell battery;

[0021] L, the dimension of the first cooling channel in the thickness direction of the square battery;

[0022] H1, the height of the square-shell battery;

[0023] H2, the height of the first cooling channel. Detailed Implementation

[0024] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] like Figures 1 to 7 As shown, this embodiment of the present invention provides a battery pack, which includes multiple prismatic batteries 10 and a cooling component 30. Each prismatic battery 10 has a top surface 11, a bottom surface 12, two first side surfaces 13, and two second side surfaces 14. The area of ​​the first side surface 13 is larger than the area of ​​the second side surface 14. The multiple prismatic batteries 10 are arranged along their length to form a battery array 20. The cooling component 30 has a first cooling channel 31. The connection between the first side surface 13 and the top surface 11 is a first edge 15, and the connection between the first side surface 13 and the bottom surface 12 is a second edge 16. The first cooling channel 31 is provided at the two first edges 15 and / or the two second edges 16, and the first cooling channel 31 extends along the arrangement direction of the prismatic batteries 10.

[0026] The battery pack provided in this embodiment utilizes a first cooling channel 31 that is fitted onto two first edges 15 and / or two second edges 16 of the prismatic battery 10, extending along the arrangement direction of the prismatic battery 10. By taking advantage of the relatively concentrated heat inside the battery at the edges, efficient heat dissipation is achieved, improving the heat dissipation effect of the battery pack. Therefore, the heat dissipation performance of the battery pack is significantly improved, the temperature distribution of the battery is more uniform, and the battery life is effectively extended.

[0027] It should be noted that the inventors discovered that in related technologies, the large side surface of the battery is in close contact with adjacent batteries, resulting in a higher concentration of heat at the battery edges. However, due to the layout and design of existing heat dissipation components, this heat is difficult to dissipate effectively, leading to excessively high temperatures at the battery edges. This affects battery performance and safety, and may even cause serious problems such as thermal runaway. Based on the inventors' findings, the battery pack provided in this embodiment utilizes a first cooling channel at the edges, taking advantage of the relatively concentrated heat inside the battery at these edges to achieve efficient heat dissipation and improve the heat dissipation effect of the battery pack.

[0028] The larger side surface of the battery is the first side surface 13, and the smaller side surface of the battery is the second side surface 14.

[0029] The cooling component 30 includes a top cooling plate 32 and / or a bottom cooling plate 33. The top cooling plate 32 is fitted against the top surface 11, and the bottom cooling plate 33 is fitted against the bottom surface 12. First cooling channels 31 at two first edges 15 are respectively located on both sides of the top cooling plate 32 and facing the top surface 11. Similarly, first cooling channels 31 at two second edges 16 are respectively located on both sides of the bottom cooling plate 33 and facing the bottom surface 12. With this structure, the top cooling plate 32 and the bottom cooling plate 33 do not occupy space on the large side surfaces of the battery, allowing full utilization of the space between the large side surfaces of two adjacent batteries. This, in turn, improves the energy density of the battery pack while ensuring effective heat dissipation.

[0030] In this embodiment, the cooling component 30 includes a top cooling plate 32 and a bottom cooling plate 33. Through the cooperation of the top cooling plate 32 and the bottom cooling plate 33, the upper and lower edges of the battery are simultaneously cooled using the first cooling channel 31, increasing the heat dissipation area and efficiency. The battery's heat can be dissipated more quickly, improving the battery's safety and reliability.

[0031] like Figure 2 and Figure 4 As shown, the top cold plate 32 and / or the bottom cold plate 33 have vertically arranged limiting portions 34, which engage with the first side surface 13. Through the engagement of the limiting portions 34 and the first side surface 13, the battery is fixed and positioned, preventing movement within the battery pack and ensuring the structural stability of the battery pack. Furthermore, because the battery is securely fixed within the battery pack, relative displacement between batteries is reduced, thereby decreasing vibration and impact within the battery pack and improving its overall performance.

[0032] In this embodiment, both the top cold plate 32 and the bottom cold plate 33 have a limiting part 34 arranged vertically, which has a better limiting effect.

[0033] Specifically, the limiting part 34 includes a flange 341, which is an elongated strip structure extending along the length direction of the prismatic battery 10. By utilizing the structural features of the flange 341, the contact area between the limiting part 34 and the first side surface 13 can be increased, while providing sufficient strength to fix the battery.

[0034] Limiting portions 34 are provided on both sides of the top cold plate 32 and / or both sides of the bottom cold plate 33. By providing limiting portions 34 on both sides of the cold plate, the battery can be fixed in all directions, resulting in better battery fixation, a more stable battery pack structure, and improved adaptability and safety of the battery pack in complex environments.

[0035] In this embodiment, limiting portions 34 are provided on both sides of the top cold plate 32 and both sides of the bottom cold plate 33.

[0036] The battery pack includes multiple battery rows 20, with a heat insulation layer between the limiting portions 34 of adjacent battery rows 20, and / or between adjacent battery rows 20. By providing a heat insulation layer between adjacent battery rows 20, heat conduction between batteries is reduced, achieving thermal isolation inside the battery pack, preventing battery overheating, and improving the overall safety and reliability of the battery pack.

[0037] Specifically, the insulation layer includes, but is not limited to, insulation foam, which can both insulate against heat and absorb vibrations from the battery.

[0038] like Figure 4 As shown, in this embodiment, both the top cold plate 32 and the bottom cold plate 33 include a connecting plate 35 and two flow channel strips 36. The connecting plate 35 extends along the length of the prismatic battery 10, and the two flow channel strips 36 are respectively disposed on both sides of the connecting plate 35. The flow channel strips 36 have a hollow structure, and the inner hole of the flow channel strips 36 forms a first cooling flow channel 31. The main structure of the cold plate is formed by the combination of the connecting plate 35 and the flow channel strips 36. The hollow structure of the flow channel strips 36 serves as the first cooling flow channel 31 to realize the flow of refrigerant and cool the battery. With the above structure, the cold plate has a reasonable structural design, high heat dissipation efficiency, and a compact structure, saving internal space of the battery pack.

[0039] The connecting plate 35 of the top cold plate 32 has a pole clearance hole 321 to allow clearance for the pole, and / or the connecting plate 35 of the bottom cold plate 33 has an explosion-proof valve clearance hole 331 to allow clearance for the explosion-proof valve.

[0040] By providing clearance holes on the connecting plate 35 of the cold plate, sufficient space is provided for the battery terminals and explosion-proof valve, avoiding interference between the cold plate and key battery components, and ensuring the normal operation and safety performance of the battery. The battery pack's structural design is more rational, improving assembly efficiency and safety.

[0041] Wherein, the two ends of the first cooling channel 31 extend to the two ends of the battery array 20 respectively; and / or, the cooling element 30 does not protrude from the first side 13 in the thickness direction of the square battery 10.

[0042] By extending the two ends of the first cooling channel 31 to the two ends of the battery pack 20, uniform distribution of the refrigerant within the battery pack is ensured, improving heat dissipation. Furthermore, multiple prismatic batteries 10 in the same battery pack 20 share a single cooling element 30, which enhances the integration of the device and reduces processing and assembly costs.

[0043] Meanwhile, the cooling component 30 does not protrude beyond the first side 13 in the thickness direction of the square battery 10, thus avoiding an increase in the overall size of the battery pack and improving space utilization. The heat dissipation performance and space utilization of the battery pack are optimized in two ways, improving the overall performance of the battery pack.

[0044] In some embodiments, the cooling element 30 further has a second cooling channel communicating with the first cooling channel 31. The connection between the second side surface 14 and the top surface 11 is a third edge 17, and the connection between the second side surface 14 and the bottom surface 12 is a fourth edge 18. Second cooling channels are provided at both third edges 17 and / or both fourth edges 18. By adding the second cooling channels, the heat dissipation area is further increased, achieving cooling of all edges of the battery and improving heat dissipation efficiency. The heat dissipation performance of the battery pack is further improved, the temperature distribution of the battery is more uniform, and the battery's lifespan and safety are enhanced.

[0045] like Figure 6 As shown, the thickness of the prismatic battery 10 is D, and the dimension of the first cooling channel 31 in the thickness direction of the prismatic battery 10 is L. D and L have the same unit, and 0.01 ≤ L / D ≤ ​​0.35. By controlling the dimensional ratio of the first cooling channel 31 in the battery thickness direction, a balance is ensured between the heat dissipation effect of the first cooling channel 31 and the overall structural compactness of the battery pack. While ensuring heat dissipation, the volume of the battery pack is effectively controlled, improving the space utilization rate of the battery pack.

[0046] Specifically, L / D can be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34, 0.35, and any other value between 0.01 and 0.35.

[0047] like Figure 6 As shown, the height of the prismatic battery 10 is H1, and the height of the first cooling channel 31 is H2. H1 and H2 have the same unit, and 0.001 ≤ H2 / H1 ≤ 0.2. By controlling the height ratio of the first cooling channel 31, a balance is ensured between the heat dissipation effect of the first cooling channel 31 and the overall structural stability of the battery pack. While ensuring heat dissipation, the structural strength of the battery pack is enhanced, improving its reliability and safety.

[0048] Specifically, H2 / H1 can be 0.001, 0.005, 0.01, 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065, 0.07, 0.075, 0.08, 0.085, 0.09, 0.095, 0.1, 0.105, 0.11, 0.115, 0.12, 0.125, 0.13, 0.135, 0.14, 0.145, 0.15, 0.155, 0.16, 0.165, 0.17, 0.175, 0.18, 0.185, 0.19, 0.195, 0.2, and any other value between 0.001 and 0.2.

[0049] like Figure 2 , Figure 5 as well as Figure 7 As shown, in this embodiment, the cooling component 30 further includes a current collector 37, a first connecting pipe 38, and a second connecting pipe 39. The current collector 37 has a flow cavity, and the first ends of the first cooling channels 31 at the two first edges 15 and the two second edges 16 are respectively connected to the flow cavity. The inlet and outlet of the cooling component 30 are respectively connected to the flow cavity. The second ends of the first cooling channels 31 at the two first edges 15 are respectively connected to both ends of the first connecting pipe 38. The second ends of the first cooling channels 31 at the two second edges 16 are respectively connected to both ends of the second connecting pipe 39. Through the configuration of the current collector 37, the first connecting pipe 38, and the second connecting pipe 39, uniform distribution and circulation of the refrigerant within the battery pack are achieved, improving heat dissipation efficiency. The heat dissipation performance of the battery pack is significantly improved, the battery temperature control is more precise, and the overall safety and reliability of the battery pack are enhanced.

[0050] In this embodiment, the battery pack also includes a housing, within which multiple prismatic batteries 10 and a cooling element 30 are disposed. The housing configuration provides additional mechanical protection for the battery pack, preventing external environmental influences.

[0051] Another embodiment of this utility model provides an electrical device, which includes a battery pack, specifically the battery pack described above. Therefore, this electrical device can also utilize the characteristic that heat is relatively concentrated inside the battery at its edges to achieve efficient heat dissipation from the battery, thus improving the heat dissipation effect of the battery pack.

[0052] Electrical devices include, but are not limited to, vehicles.

[0053] The apparatus provided by the embodiments has the following beneficial effects:

[0054] (1) By setting a first cooling channel 31 at the two first edges 15 and / or the two second edges 16 of the square battery 10, and extending the first cooling channel 31 along the length of the square battery 10, the heat inside the battery is relatively concentrated at the edges, so as to achieve efficient heat dissipation of the battery and improve the heat dissipation effect of the battery pack.

[0055] (2) By cooperating with the limiting part 34 and the first side 13, the battery is fixed and limited, preventing the battery from moving inside the battery pack and ensuring the structural stability of the battery pack. Furthermore, since the battery is firmly fixed inside the battery pack, the relative displacement between the batteries can be reduced, thereby reducing the vibration and impact inside the battery pack and improving the overall performance of the battery pack;

[0056] (3) By setting a heat insulation layer between adjacent battery columns 20, the heat conduction between batteries is reduced, the internal heat isolation of the battery pack is achieved, the battery overheating is prevented, and the overall safety and reliability of the battery pack is improved.

[0057] (4) The main structure of the cold plate is formed by the combination of the connecting plate 35 and the flow channel strip 36. The hollow structure of the flow channel strip 36 is used as the first cooling flow channel 31 to realize the flow of refrigerant and cool the battery. With the above structure, the cold plate has a reasonable structural design, high heat dissipation efficiency, and a compact structure, which saves the internal space of the battery pack.

[0058] (5) By controlling the dimensional ratio of the first cooling channel 31 in the battery thickness direction, a balance is ensured between the heat dissipation effect of the first cooling channel 31 and the overall structural compactness of the battery pack. While ensuring the heat dissipation effect, the volume of the battery pack is effectively controlled, improving the space utilization rate of the battery pack. By controlling the height ratio of the first cooling channel 31, a balance is ensured between the heat dissipation effect of the first cooling channel 31 and the overall structural stability of the battery pack. While ensuring the heat dissipation effect, the structural strength of the battery pack is enhanced, improving the reliability and safety of the battery pack.

[0059] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0061] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0062] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0063] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0064] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, The battery pack includes: Multiple square-shell batteries (10), each of the square-shell batteries (10) has a top surface (11), a bottom surface (12), two first side surfaces (13) and two second side surfaces (14), the area of ​​the first side surface (13) is larger than the area of ​​the second side surface (14), the multiple square-shell batteries (10) are arranged in their length direction and form a battery column (20); Cooling component (30) having a first cooling channel (31); The connection between the first side surface (13) and the top surface (11) is the first edge (15), and the connection between the first side surface (13) and the bottom surface (12) is the second edge (16). The first cooling channel (31) is provided at the two first edges (15) and / or the two second edges (16). The first cooling channel (31) extends along the arrangement direction of the square battery (10).

2. The battery pack according to claim 1, characterized in that, The cooling component (30) includes a top cooling plate (32) and / or a bottom cooling plate (33). The top cooling plate (32) is disposed in contact with the top surface (11), and the bottom cooling plate (33) is disposed in contact with the bottom surface (12). The first cooling channels (31) at the two first edges (15) are respectively disposed on both sides of the top cooling plate (32) and facing the top surface (11). The first cooling channels (31) at the two second edges (16) are respectively disposed on both sides of the bottom cooling plate (33) and facing the bottom surface (12).

3. The battery pack according to claim 2, characterized in that, The top cold plate (32) and / or the bottom cold plate (33) have a limiting part (34) arranged vertically, which is in a limiting cooperation with the first side (13).

4. The battery pack according to claim 3, characterized in that, The limiting part (34) includes a flange (341), which is a long strip structure extending along the length direction of the square battery (10).

5. The battery pack according to claim 3, characterized in that, The limiting part (34) is provided on both sides of the top cold plate (32) and / or on both sides of the bottom cold plate (33).

6. The battery pack according to claim 3, characterized in that, The battery pack includes a plurality of battery columns (20), and a heat insulation layer is provided between the limiting portions (34) of two adjacent battery columns (20), and / or a heat insulation layer is provided between two adjacent battery columns (20).

7. The battery pack according to claim 2, characterized in that, Both the top cold plate (32) and the bottom cold plate (33) include a connecting plate (35) and two flow channels (36). The connecting plate (35) extends along the length of the square battery (10). The two flow channels (36) are respectively disposed on both sides of the connecting plate (35). The flow channels (36) are hollow structures, and the inner holes of the flow channels (36) form the first cooling flow channel (31).

8. The battery pack according to claim 7, characterized in that, The connecting plate (35) of the top cold plate (32) has a pole clearance hole (321), and / or the connecting plate (35) of the bottom cold plate (33) has an explosion-proof valve clearance hole (331).

9. The battery pack according to any one of claims 1 to 8, characterized in that, The two ends of the first cooling channel (31) extend to the two ends of the battery array (20); and / or, The cooling element (30) does not protrude beyond the first side surface (13) in the thickness direction of the square battery (10).

10. The battery pack according to any one of claims 1 to 8, characterized in that, The cooling component (30) also has a second cooling channel connected to the first cooling channel (31), the connection between the second side surface (14) and the top surface (11) is a third edge (17), the connection between the second side surface (14) and the bottom surface (12) is a fourth edge (18), and the second cooling channel is provided at both of the third edges (17) and / or both of the fourth edges (18).

11. The battery pack according to any one of claims 1 to 8, characterized in that, The thickness of the square battery (10) is D, and the dimension of the first cooling channel (31) in the thickness direction of the square battery (10) is L. The units of D and L are the same, and 0.01≤L / D≤0.

35.

12. The battery pack according to any one of claims 1 to 8, characterized in that, The height of the square battery (10) is H1, and the height of the first cooling channel (31) is H2. The units of H1 and H2 are the same, and 0.001≤H2 / H1≤0.

2.

13. The battery pack according to any one of claims 1 to 8, characterized in that, The cooling component (30) also includes: The current collector (37) has a flow cavity, the first ends of the first cooling channels (31) at the two first edges (15) and the two second edges (16) are respectively connected to the flow cavity, and the inlet and outlet of the cooling component (30) are respectively connected to the flow cavity; The second ends of the first cooling channels (31) at the two first edges (15) of the first connecting pipe (38) are respectively connected to the two ends of the first connecting pipe (38); The second connecting pipe (39) has its second ends of the first cooling channel (31) at the two second edges (16) connected to both ends of the second connecting pipe (39).

14. The battery pack according to any one of claims 1 to 8, characterized in that, The battery pack also includes a housing, in which a plurality of the prismatic batteries (10) and the cooling element (30) are disposed.

15. An electrical appliance, characterized in that, The electrical device includes a battery pack, which is the battery pack according to any one of claims 1 to 14.

Images