Battery pack and electric device

Abstract

The invention relates to the technical field of batteries, and discloses a battery pack and a power utilization device.The battery pack comprises a box body, a second plate and battery cells, the box body comprises a box frame and a first plate, the box frame and the first plate are connected to define a containing cavity, and a medium inlet and a medium outlet are formed in the box frame at intervals; a groove is formed in the first plate piece, and a groove opening of the groove faces the containing cavity; the second plate covers the notch and is connected with the first plate, and a first fluid channel communicated with the medium inlet is defined by the second plate and the groove; a plurality of through holes are formed in the second plate at intervals, and the through holes communicate with the first fluid channel and the containing cavity; the battery cells are arranged in multiple rows, and gaps are formed between the adjacent battery cells; the gap and the through hole are oppositely arranged in the first direction. The flow path and the flow direction of the heat exchange medium are guided, so that the heat exchange medium flows out of the areas where the battery cells are located, and the situation that the heat exchange effects of the battery cells in the areas are greatly different due to the fact that the heat exchange medium cannot reach the areas where part of the battery cells are located is avoided.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Technology

[0002] In battery systems, thermal management components are typically installed to manage battery temperature. Various thermal management methods are common, such as cooling or heating the battery through airflow; cooling or heating the battery through a cooling plate containing coolant; or cooling or heating the module or cell by directly immersing it in a cooling medium, i.e., immersion thermal management.

[0003] Batteries employing immersion thermal management have internal modules or cells filled with a heat exchange medium. During its flow, the medium exchanges heat with the modules or cells, achieving cooling or heating effects. However, due to the various structures and components within the battery pack, the space occupied by the heat exchange medium is irregular. As the medium flows through different areas of the battery pack, its flow becomes chaotic, potentially preventing it from reaching certain cell areas. This results in significant differences in the heat exchange effect received by cells in different areas of the battery pack. Summary of the Invention

[0004] The purpose of this invention is to provide a battery pack and an electrical device to solve the problem in the prior art where the heat exchange medium flows chaotically within the battery pack, making it easy for the heat exchange medium to fail to reach the areas where some battery cells are located.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: One aspect of the present invention is to provide a battery pack having a first orientation, comprising: The housing includes a frame and a first plate. The frame and the first plate are connected to form a receiving cavity with an opening on one side. The frame is provided with a medium inlet and a medium outlet at intervals. The medium outlet communicates with the receiving cavity. The first plate is provided with a groove, and the groove opening faces the receiving cavity. The second plate is disposed on the groove and connected to the first plate. The second plate and the groove enclose a first fluid channel, which is connected to the medium inlet. The second plate is provided with a plurality of through holes at intervals, which are connected to the first fluid channel and the receiving cavity. The battery cell is provided in multiple rows and disposed within the receiving cavity, with gaps between adjacent cells; the gaps and the through holes are disposed opposite to each other along the first direction.

[0006] In some embodiments, the orthographic projection of the battery cell onto the first plate along the first direction at least partially falls within the groove.

[0007] In some embodiments, the battery pack further has a second direction and a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular to each other; The grooves are provided in multiple ways, and the multiple grooves are spaced apart along the second direction; the second plate is provided in multiple ways, and the multiple second plates are provided in one-to-one correspondence with the multiple grooves; the second plate is provided with multiple through holes, and the multiple through holes are spaced apart along the third direction.

[0008] In some embodiments, the second plate includes a first layer and a second layer stacked together, the first layer and the second layer being interconnected, the first layer being connected to the first plate, the second layer being connected to the battery cell, the hardness of the first layer being greater than the hardness of the second layer, and the through hole penetrating the first layer and the second layer along the first direction.

[0009] In some embodiments, the system further includes a first beam and a second beam, which are spaced apart within the box frame. The first beam and the second beam are respectively connected to the first plate, and the first beam, the second beam, and the first plate form the receiving cavity within the box frame. The medium inlet is located on the first beam, and the first beam has a second fluid channel communicating with the medium inlet. The first beam has a flow port that connects the first fluid channel and the second fluid channel. The medium outlet is located on the second beam.

[0010] In some embodiments, the second fluid channel has a first channel wall and a second channel wall connected to each other, the flow port is disposed on the first channel wall, the medium inlet is disposed on the second channel wall, and a reinforcing rib is provided at the connection between the second channel wall and the first channel wall.

[0011] In some embodiments, the box frame is provided with a first box wall and a second box wall disposed opposite to each other; The battery pack further includes a third beam and a fourth beam. The third beam is disposed on the side of the first box wall facing the receiving cavity, and the fourth beam is disposed on the side of the second box wall facing the receiving cavity. The first beam, the third beam, the second beam, and the fourth beam are sequentially connected to the first plate to form the receiving cavity. Along the first direction, the height of the third beam is less than the height of the first box wall to form a first limiting step, and the height of the fourth beam is less than the height of the second box wall to form a second limiting step.

[0012] In some embodiments, a cover plate is further included, the cover plate having a plurality of sides respectively connected to the first beam, the third beam, the second beam and the fourth beam to close the receiving cavity.

[0013] In some embodiments, the cover plate is partially recessed on the side facing the receiving cavity.

[0014] In some embodiments, the system further includes a first fitting and a second fitting, wherein the first fitting is connected to the medium inlet and the second fitting is connected to the medium outlet, and the first fitting and the second fitting extend outside the box frame, respectively.

[0015] In some embodiments, a separator is further included, which is disposed within the receiving cavity and connected to the first plate. The separator divides the receiving cavity into a first cavity and a second cavity, which are interconnected. The battery cell is disposed in the first cavity, and the dielectric outlet is connected to the second cavity.

[0016] In some embodiments, a support beam is further included, disposed within the second cavity, the support beam abutting against the side of the partition facing the second cavity.

[0017] Another aspect of the present invention is to provide an electrical device comprising a battery pack as described above.

[0018] Compared with the prior art, the battery pack and power-consuming device of this invention have the following advantages: In this embodiment of the battery pack, a first plate is connected to a frame to form a housing. A groove is formed on the first plate, and a second plate covers the groove, with the second plate and the groove enclosing a first fluid channel connecting the medium inlet. A through-hole is formed on the second plate connecting the first fluid channel and a receiving cavity. The heat exchange medium enters the first fluid channel from the medium inlet, passes through multiple through-holes into the gaps between adjacent battery cells, exchanges heat with the cells, and then flows from the receiving cavity to the medium outlet, exiting through the medium outlet. The first fluid channel and through-holes guide the flow path and direction of the heat exchange medium, ensuring that the flow of the heat exchange medium covers the entire battery cell area. By setting the through-holes relative to the gaps between adjacent battery cells, the heat exchange medium flows through the through-holes to the spaces between adjacent battery cells, ensuring that each battery cell area has heat exchange medium flowing out. This avoids significant differences in heat exchange effects between battery cells in different areas due to the heat exchange medium not reaching some battery cell areas. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the battery pack described in an embodiment of the present invention; Figure 2 This is an exploded view of the battery pack described in an embodiment of the present invention; Figure 3 This is a top view of the battery pack with the cover removed in an embodiment of the present invention; Figure 4 yes Figure 3 Sectional view along line AA in the middle; Figure 5 yes Figure 4 Enlarged view of point B in the middle; Figure 6 yes Figure 4 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of the box body in an embodiment of the present invention; Figure 8 This is an exploded view of the box body in an embodiment of the present invention; Figure 9 This is a schematic diagram of the installation of the second plate in the housing in an embodiment of the present invention; Figure 10 This is a schematic diagram of the first plate in an embodiment of the present invention; Figure 11 This is a partial cross-sectional view of the first plate in an embodiment of the present invention; Figure 12 This is a schematic diagram of the second plate component in an embodiment of the present invention; Figure 13 This is a partial sectional view of the connection between the cover plate and the box body in an embodiment of the present invention; Figure 14 This is another partial sectional view of the connection between the cover plate and the box body in an embodiment of the present invention; Figure 15 This is a schematic diagram of the cover plate in an embodiment of the present invention.

[0020] Numbering on the map: 10. Housing; 101. Receiving cavity; 1011. First cavity; 1012. Second cavity; 102. Medium inlet; 1021. First pipe fitting; 103. Medium outlet; 1031. Second pipe fitting; 11. Housing frame; 111. First housing wall; 112. Second housing wall; 113. Third housing wall; 114. Fourth housing wall; 12. First plate; 121. First fluid channel; 122. Groove; 1221. Slot; 20. Battery cell; 201. Gap; 30. Second plate; 3 01. Through hole; 31. First layer; 32. Second layer; 40. First beam; 401. Second fluid channel; 4011. First channel wall; 4012. Second channel wall; 402. Flow port; 403. Reinforcing rib; 50. Second beam; 60. Third beam; 601. First limiting step; 61. Fourth beam; 611. Second limiting step; 70. Separator; 80. Support beam; 90. Cover plate; 901. Side; Z. First direction; Y. Second direction; X. Third direction. Detailed Implementation

[0021] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical 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 invention based on the specific circumstances.

[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] See Figures 1-2 , Figures 7-11 As shown, this embodiment of the invention provides a battery pack with a first direction Z, where Z refers to the height direction of the battery pack. The battery pack is an immersion-cooled battery pack. The battery pack includes a housing 10, a second plate 30, and battery cells 20. The housing 10 includes a frame 11 and a first plate 12. The frame 11 and the first plate 12 are connected to form a receiving cavity 101 with an opening on one side. The frame 11 is provided with a medium inlet 102 and a medium outlet 103, which communicate with the receiving cavity 101. The first plate 12 is provided with a groove 122, and the groove opening 1221 of the groove 122 faces the receiving cavity 101. The second plate 30 covers the groove opening 1221. The second plate 30 and the first plate 122 are connected. 2. The second plate 30 and the groove 122 enclose each other to form a first fluid channel 121, which is connected to the medium inlet 102. The second plate 30 is provided with a plurality of through holes 301 at intervals, which connect the first fluid channel 121 and the receiving cavity 101. Multiple battery cells 20 are provided, which are arranged in multiple rows and are located in the receiving cavity 101. There is a gap 201 between adjacent battery cells 20. The gap 201 between adjacent battery cells 20 and the through holes 301 are arranged opposite to each other along the first direction Z.

[0025] The heat exchange medium enters the first fluid channel 121 through the medium inlet 102, and then flows through multiple through holes 301 into the gaps 201 between adjacent battery cells 20 to exchange heat with the battery cells 20. Afterward, it flows from the receiving cavity 101 to the medium outlet 103 and exits through the medium outlet 103. The first fluid channel 121 and the through holes 301 guide the flow path and direction of the heat exchange medium, ensuring that the flow of the heat exchange medium covers the entire battery cell area. By setting the through holes 301 to be aligned with the gaps 201 between adjacent battery cells 20, the heat exchange medium flows through the through holes 301 to the spaces between adjacent battery cells 20, ensuring that each area of ​​the battery cell 20 has heat exchange medium flowing out and immersing the battery cell 20. This prevents the heat exchange medium from failing to reach some areas of the battery cell 20, which could lead to significant differences in the heat exchange effect among different areas of the battery cell 20. The heat exchange medium can be cooling water.

[0026] In the prior art, the heat exchange medium is filled between the battery cell 20 and the housing 10. These spaces are irregular, for example, the battery cell 20 has protruding terminals, wiring harnesses and other structural components, which makes the flow of the cooling medium chaotic and uncontrollable, and even the cooling medium in some areas is completely still. This application guides the flow path and direction of the heat exchange medium through the first fluid channel 121 and the through hole 301, so that the heat exchange medium flows through the battery cell 20 more uniformly and orderly. This can improve the chaotic and disordered flow of the heat exchange medium, avoid heat accumulation in certain areas, and make the cooling effect of each battery cell 20 consistent. This is beneficial to improving the consistency of the battery cell 20 and improving the overall performance and cycle life of the battery pack.

[0027] This application creates a groove 122 in the first plate 12 to form a first fluid channel 121, which does not occupy the internal space of the battery pack and improves the integration of the battery pack. Moreover, it eliminates the need for additional pipes for fluid flow, thereby simplifying the installation and connection of fluid pipes within the battery pack and simplifying the battery pack structure.

[0028] The battery pack also has a second direction Y and a third direction X, with the first direction Z, the second direction Y, and the third direction X being mutually perpendicular. The second direction Y refers to the width direction of the battery pack, and the third direction X refers to the length direction of the battery pack. The width direction of the first plate 12 is parallel to the second direction Y, and the length direction of the first plate 12 is parallel to the third direction X. The width direction of the second plate 30 is parallel to the second direction Y, and the length direction of the second plate 30 is parallel to the third direction X.

[0029] In some embodiments, the groove 122 can be a strip-shaped groove, and the cross-sectional shape of the groove 122 parallel to the groove width direction is U-shaped. The groove length direction of the groove 122 is parallel to a third direction X, and the groove width direction of the groove 122 is parallel to a second direction Y. In other embodiments, the groove wall of the groove 122 can also be a curved surface. The cross-sectional shape of the groove 122 can also be V-shaped or other shapes.

[0030] See Figure 11 As shown, in some embodiments, the first plate 12 is partially recessed to form a groove 122, and the bottom surface of the groove 122 protrudes from the side of the first plate 12 opposite to the battery cell 20.

[0031] See Figures 7-9 As shown, in some embodiments, the box frame 11 includes a first box wall 111, a second box wall 112, a third box wall 113, and a fourth box wall 114, which are connected end-to-end to form a frame structure. The first box wall 111, the second box wall 112, the third box wall 113, and the fourth box wall 114 are respectively connected to the first plate 12.

[0032] In some embodiments, the orthographic projection of the cell 20 on the first plate 12 along the first direction Z at least partially falls within the groove 122, so that the heat exchange medium flowing out through the through hole 301 can flow directly to the cell 20.

[0033] See Figure 2 , Figures 7-10 As shown, in some embodiments, multiple grooves 122 are provided, and the multiple grooves 122 are spaced apart along the second direction Y; multiple second plates 30 are provided, and the multiple second plates 30 are arranged one-to-one with the multiple grooves 122. The second plates 30 cover the corresponding grooves 122, and the second plates 30 and the corresponding grooves 122 enclose to form a first fluid channel 121, so that multiple first fluid channels 121 are provided. The multiple first fluid channels 121 correspond to multiple rows of battery cells 20. Multiple through holes 301 are opened on the second plates 30, and the multiple through holes 301 are spaced apart along the third direction X. The gaps 201 between the through holes 301 and adjacent battery cells 20 are opposite, so that the heat exchange medium flowing out of the through holes 301 can exchange heat with the battery cells 20. Optionally, the gaps 201 between the through holes 301 and the large surfaces of adjacent battery cells 20 are opposite, so that the heat exchange medium flowing out of the through holes 301 can exchange heat with the large surfaces of the battery cells 20, thereby increasing the heat exchange area and improving the heat exchange efficiency.

[0034] In some embodiments, the battery cell 20 is bonded to the first plate 12, and the first plate 12 is bonded to the second plate 30. The second plate 30 is bonded to the battery cell 20. The second plate 30 can act as a sealant to prevent the adhesive layer between the battery cell 20 and the first plate 12 from entering the first fluid channel 121.

[0035] See Figure 12As shown, in some embodiments, the second plate 30 includes a first layer 31 and a second layer 32 stacked together. The first layer 31 and the second layer 32 are interconnected. The first layer 31 is connected to the first plate 12, and the second layer 32 is connected to the battery cell 20. The hardness of the first layer 31 is greater than that of the second layer 32. A through hole 301 penetrates the first layer 31 and the second layer 32 along the first direction Z. The first layer 31 is in contact with the heat exchange medium in the first fluid channel 121. The high hardness of the first layer 31 ensures the restriction and guidance of the heat exchange medium, preventing the heat exchange medium from impacting the first layer 31 and causing deformation. The first layer 31 can be made of a hard material. The second layer 32 is connected to the battery cell 20. The low hardness of the second layer 32 ensures better fit between the second layer 32 and the battery cell 20, and allows the battery cell 20 to have certain installation tolerances. Furthermore, when the battery cell 20 and the first plate 12 are bonded together with adhesive, the second layer 32 can also provide better adhesive protection.

[0036] See Figures 3-9 As shown, in some embodiments, the box frame 11 further includes a first beam 40 and a second beam 50, which are spaced apart. The first beam 40 and the second beam 50 are respectively connected to the first plate 12, and the first beam 40, the second beam 50, and the first plate 12 enclose a receiving cavity 101, in which the battery cell 20 is disposed. A medium inlet 102 is disposed on the first beam 40, and a second fluid channel 401 communicating with the medium inlet 102 is provided in the first beam 40. The first beam 40 has a flow port 402, which connects the first fluid channel 121 and the second fluid channel 401. A medium outlet 103 is disposed on the second beam 50. The first beam 40 is spaced apart from the third box wall 113, and the second beam 50 is spaced apart from the fourth box wall 114. By setting the first beam 40 and the second beam 50, the receiving cavity 101 for placing the battery cell 20 is separated from the box 10. The second beam 50, together with the first box wall 111, the second box wall 112, the fourth box wall 114, and the first plate 12, forms an electrical compartment for placing electrical components. This arrangement ensures that the heat exchange medium exists within the receiving cavity 101, preventing the electrical components inside the electrical compartment from being soaked in the heat exchange medium and avoiding damage to the electrical components due to immersion.

[0037] A cavity is provided within the first beam 40, forming a second fluid channel 401. The size of the cavity can be adjusted according to flow requirements. In some embodiments, a partial cavity is formed within the first beam 40 to reduce the cross-sectional dimensions of the second fluid channel 401, thereby reducing the amount of heat exchange medium used and promoting weight reduction. The portion of the first beam 40 outside the cavity is a solid structure or reinforcing ribs to improve the structural strength of the first beam 40.

[0038] Multiple flow ports 402 are provided, and the multiple flow ports 402 are spaced apart along the second direction Y. The multiple flow ports 402 are provided one-to-one with multiple grooves 122, and each flow port 402 is connected to the first fluid channel 121 formed by the corresponding groove 122.

[0039] See Figure 6 As shown, in some embodiments, the second fluid channel 401 has a first channel wall 4011 and a second channel wall 4012 connected to each other. A flow port 402 is located on the first channel wall 4011, and a medium inlet 102 is located on the second channel wall 4012. A reinforcing rib 403 is provided at the connection between the second channel wall 4012 and the first channel wall 4011. A gap 201 exists between the location of the flow port 402 and the welding area of ​​the first beam 40, preventing poor sealing performance at the weld due to the flow port 402, thus avoiding poor product quality. The reinforcing rib 403 not only improves the structural strength of the first beam 40 but also allows for a wider weld, resulting in better sealing performance of the first beam 40. The cross-sectional shape of the reinforcing rib 403 parallel to the third direction X is triangular. The first channel wall 4011 extends into the second channel wall 4012 along the third direction X. Both sides of the second channel wall 4012 are connected to the first channel wall 4011. Reinforcing ribs 403 are provided at the connection points between the second channel wall 4012 and the first channel wall 4011.

[0040] See Figures 3-9 As shown, in some embodiments, the battery pack further includes a third beam 60 and a fourth beam 61. The third beam 60 is located on the side of the first housing wall 111 facing the receiving cavity 101, and the fourth beam 61 is located on the side of the second housing wall 112 facing the receiving cavity 101. The first beam 40, the third beam 60, the second beam 50, and the fourth beam 61 are sequentially connected to the first plate 12 to form the receiving cavity 101, and the battery cell 20 is disposed within the receiving cavity 101. Along the first direction Z, the height of the third beam 60 is less than the height of the first housing wall 111 to form a first limiting step 601, and the height of the fourth beam 61 is less than the height of the second housing wall 112 to form a second limiting step 611. This arrangement strengthens the structural strength of the housing frame 11, and the first limiting step 601 and the second limiting step 611 facilitate the installation and limiting of the cover plate 90. The third beam 60 is attached to the first housing wall 111, and the fourth beam 61 is attached to the second housing wall 112.

[0041] See Figure 1 , Figures 13-15As shown, in some embodiments, the battery pack further includes a cover plate 90 with multiple sides 901 connected to the first beam 40, the third beam 60, the second beam 50, and the fourth beam 61, respectively, to enclose the receiving cavity 101. The cover plate 90 individually seals the receiving cavity 101 where the battery cells 20 are placed, thereby sealing the heat exchange medium within the receiving cavity 101 and preventing the heat exchange medium from entering the battery compartment and soaking the electrical components. The side of the cover plate 90 facing the receiving cavity 101 is partially recessed, which increases the space of the receiving cavity 101 and facilitates the arrangement of the battery cells 20 within the receiving cavity 101.

[0042] See Figures 1-6 As shown, in some embodiments, the battery pack further includes a first pipe 1021 and a second pipe 1031. The first pipe 1021 is connected to the medium inlet 102, and the second pipe 1031 is connected to the medium outlet 103. The first pipe 1021 and the second pipe 1031 extend out of the housing frame 11, respectively. The first pipe 1021 connects the medium inlet 102 to the outside, and the second pipe 1031 connects the medium outlet 103 to the outside, facilitating the flow of the heat exchange medium inside the housing cavity 101 with the outside.

[0043] See Figure 5 , Figures 7-9 As shown, in some embodiments, the battery pack further includes a separator 70 disposed within the receiving cavity 101. The separator 70 is connected to the first plate 12 and divides the receiving cavity 101 into a first cavity 1011 and a second cavity 1012, which are interconnected. A battery cell 20 is disposed in the first cavity 1011, and a dielectric outlet 103 connects to the second cavity 1012. The height of the separator 70 in the third direction X is less than the height of the frame 11. The height of the separator 70 in the third direction X is also less than the height of the first beam 40 and the second beam 50, to reserve space on the side of the separator 70 away from the first plate 12, connecting the first cavity 1011 and the second cavity 1012, thereby avoiding openings in the separator 70.

[0044] See Figure 5 , Figures 7-9 As shown, in some embodiments, a support beam 80 is also included, disposed within the second cavity 1012, and the support beam 80 abuts against the side of the separator 70 facing the second cavity 1012. The support beam 80 can support the force generated by the expansion of the battery cell 20. The end of the support beam 80 away from the separator 70 abuts against the second beam 50. Multiple support beams 80 are provided, and the multiple support beams 80 are spaced apart along the second direction Y.

[0045] The present invention also provides an electrical device including the battery pack described above.

[0046] In some implementations, electrical devices include, but are not limited to, automobiles, motorcycles, electric bicycles, energy storage cabinets, low-altitude aircraft, and household appliances.

[0047] In summary, the embodiments of the present invention provide a battery pack and an electrical device, which guide the flow path and direction of the heat exchange medium through the first fluid channel 121 and the through hole 301, so that the flow of the heat exchange medium can cover the entire area of ​​the battery cell 20. By setting the through hole 301 opposite to the gap 201 between adjacent battery cells 20, the heat exchange medium flows through the through hole 301 to the area between adjacent battery cells 20, so that the area where each battery cell 20 is located has heat exchange medium flowing out, avoiding the large difference in heat exchange effect of each area of ​​battery cells 20 due to the heat exchange medium not being able to reach the area where some battery cells 20 are located.

[0048] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A battery pack having a first orientation (Z), characterized in that, include: The housing (10) includes a frame (11) and a first plate (12). The frame (11) and the first plate (12) are connected to form a receiving cavity (101) with an opening on one side. The frame (11) is provided with a medium inlet (102) and a medium outlet (103) at intervals. The medium outlet (103) communicates with the receiving cavity (101). The first plate (12) is provided with a groove (122). The groove opening (1221) of the groove (122) is provided facing the receiving cavity (101). The second plate (30) is covered by the groove (1221) and connected to the first plate (12). The second plate (30) and the groove (122) enclose a first fluid channel (121), which is connected to the medium inlet (102). The second plate (30) is provided with a plurality of through holes (301) at intervals, which are connected to the first fluid channel (121) and the receiving cavity (101). The battery cell (20) is provided in multiple rows and is located in the receiving cavity (101). There is a gap (201) between adjacent battery cells (20). The gap (201) and the through hole (301) are arranged opposite to each other along the first direction (Z).

2. The battery pack according to claim 1, characterized in that, The orthographic projection of the cell (20) on the first plate (12) along the first direction (Z) at least partially falls within the groove (122).

3. The battery pack according to claim 1 or 2, characterized in that, The battery pack also has a second direction (Y) and a third direction (X), wherein the first direction (Z), the second direction (Y), and the third direction (X) are mutually perpendicular; The groove (122) is provided in multiple ways, and the multiple grooves (122) are spaced apart along the second direction (Y); the second plate (30) is provided in multiple ways, and the multiple second plates (30) are provided in one-to-one correspondence with the multiple grooves (122); the second plate (30) is provided with multiple through holes (301), and the multiple through holes (301) are spaced apart along the third direction (X).

4. The battery pack according to claim 1, characterized in that, The second plate (30) includes a first layer (31) and a second layer (32) stacked together. The first layer (31) and the second layer (32) are connected to each other. The first layer (31) is connected to the first plate (12), and the second layer (32) is connected to the battery cell (20). The hardness of the first layer (31) is greater than that of the second layer (32). The through hole (301) penetrates the first layer (31) and the second layer (32) along the first direction (Z).

5. The battery pack according to claim 1, characterized in that, The box frame (11) includes a first beam (40) and a second beam (50), the first beam (40) and the second beam (50) are spaced apart, the first beam (40) and the second beam (50) are respectively connected to the first plate (12), and the first beam (40), the second beam (50) and the first plate (12) surround the receiving cavity (101). The medium inlet (102) is located on the first beam (40), and the first beam (40) is provided with a second fluid channel (401) communicating with the medium inlet (102). The first beam (40) is provided with a flow port (402), which connects the first fluid channel (121) and the second fluid channel (401). The medium outlet (103) is located on the second beam (50).

6. The battery pack according to claim 5, characterized in that, The second fluid channel (401) has a first channel wall (4011) and a second channel wall (4012) connected to each other. The flow port (402) is located on the first channel wall (4011), and the medium inlet (102) is located on the second channel wall (4012). A reinforcing rib (403) is provided at the connection between the second channel wall (4012) and the first channel wall (4011).

7. The battery pack according to claim 5, characterized in that, The box frame (11) also includes a first box wall (111) and a second box wall (112) disposed opposite to each other. The battery pack further includes a third beam (60) and a fourth beam (61). The third beam (60) is located on the side of the first box wall (111) facing the receiving cavity (101), and the fourth beam (61) is located on the side of the second box wall (112) facing the receiving cavity (101). The first beam (40), the third beam (60), the second beam (50), and the fourth beam (61) are sequentially connected to the first plate (12) to form the receiving cavity (101). Along the first direction (Z), the height of the third beam (60) is less than the height of the first box wall (111) to form a first limiting step (601), and the height of the fourth beam (61) is less than the height of the second box wall (112) to form a second limiting step (611).

8. The battery pack according to claim 7, characterized in that, It also includes a cover plate (90) having a plurality of sides (901) respectively connected to the first beam (40), the third beam (60), the second beam (50) and the fourth beam (61) to close the receiving cavity (101).

9. The battery pack according to claim 8, characterized in that, The cover plate (90) is partially recessed on the side facing the receiving cavity (101).

10. The battery pack according to claim 5, characterized in that, It also includes a first fitting (1021) and a second fitting (1031), the first fitting (1021) being connected to the medium inlet (102) and the second fitting (1031) being connected to the medium outlet (103), the first fitting (1021) and the second fitting (1031) extending out of the box frame (11) respectively.

11. The battery pack according to claim 1, characterized in that, It also includes a separator (70), which is disposed in the receiving cavity (101). The separator (70) is connected to the first plate (12). The separator (70) divides the receiving cavity (101) into a first cavity (1011) and a second cavity (1012). The first cavity (1011) and the second cavity (1012) are interconnected. The battery cell (20) is disposed in the first cavity (1011), and the medium outlet (103) is connected to the second cavity (1012).

12. The battery pack according to claim 11, characterized in that, It also includes a support beam (80) disposed in the second cavity (1012), the support beam (80) abutting against the side of the partition (70) facing the second cavity (1012).

13. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-12.

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