Battery pack assembly and power equipment with same

Abstract

The application discloses a battery pack assembly and a power equipment with the same. The battery pack assembly comprises a bottom plate, a first cell column and a second cell column. The bottom plate is provided with a plurality of pressure relief channels arranged at intervals in a first direction and extending in a second direction. The first cell column is provided with a plurality of first cells arranged in the first direction in sequence. The second cell column is provided with a plurality of second cells arranged in the first direction in sequence. The first cells and the second cells are respectively provided with pressure relief ports. According to the battery pack assembly, each pressure relief channel is opposite to the pressure relief ports of at least one first cell and at least one second cell, so that the plurality of first cells in the first cell column can be respectively relieved in the plurality of pressure relief channels, and the plurality of second cells in the second cell column can be respectively relieved in the plurality of pressure relief channels. Therefore, the performance of preventing secondary thermal runaway of the battery pack assembly is improved, and the safety of the battery pack assembly is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack assembly and a power device having the same. Background Technology

[0002] With technological advancements and progress, the use of new energy vehicles is becoming increasingly widespread. The battery pack is the core component providing power to electric vehicles, and the safety of the battery cells within it has always been a major concern. Battery cells are susceptible to thermal runaway during use; when this occurs, timely pressure relief is necessary to prevent secondary thermal runaway or even explosion. Currently, most automotive battery cells utilize the height difference between the cell tray and the bottom plate of the battery pack for pressure relief.

[0003] In related technologies, the height difference space between the cell tray and the bottom plate of the battery pack box is a connected space. When a cell experiences thermal runaway, the cell's pressure relief direction in the connected space is unrestricted, leading to heat diffusion. This can easily cause other cells in the battery pack to also experience thermal runaway, thereby affecting the overall safety of the battery pack and potentially causing serious safety accidents such as fires and explosions. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a battery pack assembly. The battery pack assembly according to the invention improves the battery pack assembly's resistance to secondary thermal runaway and enhances its safety by aligning each pressure relief channel with the pressure relief port of at least one first cell and the pressure relief port of at least one second cell, such that multiple first cells in a first cell row can be pressure-relieved through multiple pressure relief channels respectively, and multiple second cells in a second cell row can be pressure-relieved through multiple pressure relief channels respectively.

[0005] The present invention also proposes a power device having the above-described battery pack assembly.

[0006] The battery pack assembly according to the present invention includes: a base plate having a plurality of pressure relief channels spaced apart in a first direction and extending in a second direction; a first cell column and a second cell column, the first cell column having a plurality of first cells arranged sequentially in the first direction, and the second cell column having a plurality of second cells arranged sequentially in the first direction, the first cell column and the second cell column being arranged sequentially in the second direction; wherein the first cells and the second cells each have pressure relief ports, and each pressure relief channel is directly opposite to the pressure relief port of at least one first cell and the pressure relief port of at least one second cell.

[0007] This invention, by setting up a base plate, a first cell column, and a second cell column, arranges the first and second cell columns sequentially in a second direction, so that each pressure relief channel can be directly aligned with the pressure relief port of at least one first cell and at least one second cell. Thus, the pressure relief port of each first cell in the first cell column can be directly aligned with a different pressure relief channel, and the pressure relief port of each second cell in the second cell column can also be directly aligned with a different pressure relief channel. Therefore, when a first or second cell experiences thermal runaway, pressure can be relieved through the corresponding pressure relief channel via the pressure relief port. Furthermore, harmful substances generated by thermal runaway can also be discharged from the battery pack through the pressure relief channel. This improves the thermal runaway prevention performance of other first and second cells within the battery pack assembly, thereby enhancing the overall safety of the battery pack assembly, extending its lifespan, and saving on maintenance and replacement costs. Compared to related technologies that utilize the space between the cell tray and the bottom plate of the battery pack for pressure relief, which leads to heat diffusion and can easily cause thermal runaway in other cells, the present invention uses multiple pressure relief channels formed on the bottom plate. This makes the pressure relief space for each first and second cell more independent, thus minimizing the impact on other components within the battery pack assembly when thermal runaway occurs in the first and second cells, resulting in higher battery pack safety. Furthermore, as harmful substances generated by thermal runaway flow along the pressure relief channels, the channels also buffer and cool these substances, further improving the battery pack assembly's fire and explosion resistance and optimizing its overall safety.

[0008] According to one embodiment of the present invention, both the first cell array and the second cell array are constructed as a plurality, and the plurality of first cell arrays and the plurality of second cell arrays are arranged alternately along a second direction.

[0009] According to one embodiment of the present invention, the pressure relief ports of two adjacent first cells in a second direction are connected to the same pressure relief channel; the pressure relief port of the second cell located between the two first cells is connected to the same pressure relief channel; wherein the pressure relief ports of the two first cells are facing each other in the second direction, and the pressure relief port of the second cell is disposed on one side of the pressure relief port of the first cell in the first direction.

[0010] According to one embodiment of the invention, each of the pressure relief channels is configured as a curve or broken line extending in a second direction.

[0011] According to one embodiment of the present invention, both the first battery cell and the second battery cell are constructed as cylindrical battery cells or both the first battery cell and the second battery cell are constructed as polygonal prism battery cells, and the pressure relief port is formed at the center of the end face of the first battery cell and the center of the end face of the second battery cell.

[0012] According to one embodiment of the present invention, at least one of the inner walls of the pressure relief channel is configured in the extension direction to bulge out in a direction away from the pressure relief port.

[0013] According to one embodiment of the present invention, the battery pack assembly further includes an explosion-proof valve disposed at the pressure relief port.

[0014] According to one embodiment of the present invention, the diameters of the first battery cell and the second battery cell are d1, the width of the explosion-proof valve is d2, and the width of a single pressure relief channel is d3, satisfying: d2 < d3 < d1.

[0015] According to one embodiment of the present invention, the inner wall of the pressure relief channel is provided with a high-temperature resistant coating.

[0016] The power equipment according to the present invention is briefly described below.

[0017] The power equipment according to the present invention is provided with a battery pack assembly as described in any one of the above embodiments. Since the power equipment according to the present invention is provided with a battery pack assembly as described in any one of the above embodiments, the battery pack assembly in the power equipment is provided with multiple pressure relief channels, so as to achieve more independent pressure relief space when different first cells and different second cells experience thermal runaway, thereby improving the overall thermal runaway prevention performance of the battery pack assembly, thereby improving the safety of the power equipment and providing a better user experience.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a cross-sectional schematic diagram of a single first cell and its structure, including a pressure relief channel, according to an embodiment of the present invention;

[0021] Figure 2 This is a partial schematic diagram of a plurality of first cell rows and second cell rows according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the cooperation between the pressure relief channel and the first and second battery cell arrays according to an embodiment of the present invention.

[0023] Figure label:

[0024] Battery pack assembly 1;

[0025] Base plate 11, pressure relief channel 111, first battery cell row 12, first battery cell 121, second battery cell row 13, second battery cell 131, explosion-proof valve 14, tray 15. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] With technological advancements and progress, the use of new energy vehicles is becoming increasingly widespread. The battery pack is the core component providing power to electric vehicles, and the safety of the battery cells within it has always been a major concern. Battery cells are susceptible to thermal runaway during use; when this occurs, timely pressure relief is necessary to prevent secondary thermal runaway or even explosion. Currently, most automotive battery cells utilize the height difference between the cell tray and the bottom plate of the battery pack for pressure relief.

[0028] In related technologies, the height difference space between the cell tray and the bottom plate of the battery pack box is a connected space. When a cell experiences thermal runaway, the cell's pressure relief direction in the connected space is unrestricted, leading to heat diffusion. This can easily cause other cells in the battery pack to also experience thermal runaway, thereby affecting the overall safety of the battery pack and potentially causing serious safety accidents such as fires and explosions.

[0029] The following is for reference. Figures 1-3 A battery pack assembly 1 according to an embodiment of the present invention is described.

[0030] The battery pack assembly 1 according to the present invention includes a base plate 11. The base plate 11 provides mounting positions for some other components in the battery pack assembly 1 and provides fixation, support and protection for some other components in the battery pack assembly 1. A plurality of pressure relief channels 111 are formed on the base plate 11, spaced apart in a first direction and extending in a second direction. The battery pack assembly 1 according to the present invention also includes a first cell row 12 and a second cell row 13. The first cell row 12 is provided with a plurality of first cells 121 arranged sequentially in the first direction, and the second cell row 13 is provided with a plurality of second cells 131 arranged sequentially in the first direction. The first cell row 12 and the second cell row 13 are arranged sequentially in the second direction. Each of the first cells 121 and the second cells 131 has a pressure relief port, which can release pressure and discharge harmful substances in the event of thermal runaway of the first cells 121 and the second cells 131. Each pressure relief channel 111 on the base plate 11 is directly opposite to the pressure relief port of at least one first cell 121 and at least one second cell 131.

[0031] This invention, by setting a base plate 11, a first battery cell row 12, and a second battery cell row 13, arranges the first battery cell row 12 and the second battery cell row 13 sequentially in a second direction, such that each pressure relief channel 111 can be directly aligned with the pressure relief port of at least one first battery cell 121 and at least one second battery cell 131. Thus, the pressure relief port of each first battery cell 121 in the first battery cell row 12 can be directly aligned with a different pressure relief channel 111, and the pressure relief port of each second battery cell 131 in the second battery cell row 13 can also be directly aligned with a different... The pressure relief channels 111 are directly aligned, so when a first cell 121 or a second cell 131 experiences thermal runaway, pressure can be relieved through the corresponding pressure relief channel 111. Furthermore, harmful substances generated by thermal runaway can be discharged from the battery pack through the pressure relief channel 111. This improves the thermal runaway prevention performance of other first cells 121 and second cells 131 within the battery pack assembly 1, thereby enhancing the overall safety of the battery pack assembly 1, extending its lifespan, and saving on maintenance and replacement costs. Compared to related technologies that utilize the connection space between the cell tray 15 and the battery pack housing bottom plate 11 for pressure relief, which leads to heat diffusion and can easily cause other cells to experience thermal runaway, the multiple pressure relief channels 111 formed on the bottom plate 11 in this invention make the pressure relief space of each first cell 121 and second cell 131 more independent. Therefore, when a first cell 121 or second cell 131 experiences thermal runaway, the impact on other components within the battery pack assembly 1 is smaller, resulting in higher battery pack safety. In addition, during the process of harmful substances generated by thermal runaway flowing along the pressure relief channel 111, the pressure relief channel 111 can also buffer and cool the harmful substances, thereby further improving the fire resistance and explosion resistance of the battery pack assembly 1 and further optimizing the safety performance of the battery pack assembly 1.

[0032] Furthermore, in one specific embodiment of the present invention, the battery pack assembly 1 further includes a tray 15, which is disposed between the base plate 11 and the first cell row 12 and the second cell row 13. At least a portion of the surface of the tray 15 is in contact with the end face of the base plate 11 near the first cell 121 and the second cell 131. The tray 15 is suitable for fixing the first cell 121 and the second cell 131 to the base plate 11, thereby improving the ease of installation and maintenance of the battery pack assembly 1. In addition, the tray 15 can also limit the heat transfer after thermal runaway of the first cell 121 or the second cell 131 to a certain extent, further improving the safety of the battery pack assembly 1.

[0033] In another specific embodiment of the present invention, the base plate 11 is constructed as a sheet metal part. Since sheet metal parts have the advantages of simple processing technology, low cost and light weight, by constructing the base plate 11 as a sheet metal part, the production efficiency of the battery pack assembly 1 is further improved, economic costs are saved, and it is more conducive to realizing the lightweighting of the battery pack assembly 1.

[0034] In another specific embodiment of the present invention, the base plate 11 is manufactured by stamping, so that the base plate 11 can have stable quality and low cost, thereby improving the reliability of the battery pack assembly 1 and saving economic costs.

[0035] According to one embodiment of the present invention, the first battery cell array 12 and the second battery cell array 13 are each configured as a plurality, and the plurality of first battery cell arrays 12 and the plurality of second battery cell arrays 13 are arranged alternately in a second direction. Since each first cell column 12 includes a plurality of first cells 121 arranged sequentially in the first direction, and each second cell column 13 includes a plurality of second cells 131 arranged sequentially in the first direction, by constructing the first cell columns 12 and the second cell columns 13 as a plurality of alternating arrangements in the second direction, on the one hand, the plurality of first cells 121 and second cells 131 are arranged closely on the base plate 11, improving the energy density of the battery pack assembly 1 and optimizing the working performance of the battery pack assembly 1; on the other hand, by constructing the first cell columns 12 and the second cell columns 13 as a plurality of alternating arrangements in the second direction, the plurality of pressure relief ports on the plurality of first cells 121 and the plurality of second cells 131 can be arranged in a regular manner, thereby realizing the regular arrangement of the plurality of pressure relief channels 111, which is more conducive to the manufacturing and forming of the base plate 11 and the pressure relief channels 111, helping to improve production efficiency and save economic costs.

[0036] According to one embodiment of the present invention, the pressure relief ports of two adjacent first cells 121 in the second direction are connected to the same pressure relief channel 111; the pressure relief port of the second cell 131 located between the two first cells 121 is also connected to the same pressure relief channel 111; wherein the pressure relief ports of the two first cells 121 face each other in the second direction, and the pressure relief port of the second cell 131 is located on one side of the pressure relief port of the first cell 121 in the first direction. A plurality of first cells 121 and a plurality of second cells 131 that are sequentially adjacent in the second direction together constitute a hybrid cell group. The plurality of first cells 121 in each first cell column 12 belong to different hybrid cell groups, and the plurality of second cells 131 in each second cell column 13 belong to different hybrid cell groups. The plurality of pressure relief channels 111 correspond one-to-one with the plurality of hybrid cell groups, and each pressure relief channel 111 is connected to a plurality of pressure relief ports of the plurality of first cells 121 and second cells 131 in each hybrid cell group.

[0037] By connecting the pressure relief ports of two adjacent first cells 121 in the second direction to the same pressure relief channel 111, and connecting the pressure relief port of the second cell 131 located between the two first cells 121 to the same pressure relief channel 111, each pressure relief channel 111 can be connected to the pressure relief ports of adjacent first cells 121 and second cells 131 in the second direction. This achieves pressure relief independence among multiple first cells 121 in each first cell row 12 and pressure relief independence among multiple second cells 131 in each second cell row 13, thereby improving the thermal runaway protection performance of the battery pack assembly 1. In addition, by connecting the pressure relief ports of two adjacent first cells 121 in the second direction to the same pressure relief channel 111, the pressure relief of the second cell 131 located between the two first cells 121 is improved. The pressure relief port of the first cell 121 is located on one side of the pressure relief port of the first cell 121 in the first direction, which increases the distance between the pressure relief ports of adjacent first cells 121 and second cells 131 in the second direction and extends the length of the pressure relief channel 111. When the first cell 121 or the second cell 131 experiences thermal runaway, the emissions entering the pressure relief channel 111 from the pressure relief port flow along the pressure relief channel 111. This extended length of the pressure relief channel 111 helps to improve the cooling effect of the emissions, thereby improving the safety of other first cells 121 and second cells 131 in the battery pack assembly 1 and further optimizing the thermal runaway prevention performance of the battery pack assembly 1.

[0038] According to one embodiment of the present invention, each pressure relief channel 111 is configured as a curve or broken line extending in a second direction. By configuring each pressure relief channel 111 as a curve or broken line extending in a second direction, on the one hand, each pressure relief channel 111 is adapted to the pressure relief port position of the corresponding first cell 121 and second cell 131, thereby enabling rapid and smooth pressure relief in the event of thermal runaway of the first cell 121 and the second cell 131; on the other hand, by configuring each pressure relief channel 111 as a curve or broken line extending in a second direction, the length of the pressure relief channel 111 is extended and the inflection point of the pressure relief channel 111 is increased, thereby improving the cooling effect of the emissions and helping to reduce the flow rate of the emissions, thereby further optimizing the thermal runaway prevention performance of the battery pack assembly 1.

[0039] According to one embodiment of the present invention, both the first cell 121 and the second cell 131 are constructed as cylindrical cells or both are constructed as polygonal prism cells. A pressure relief port is formed at the center of the end face of the first cell 121 and the center of the end face of the second cell 131. Since the pressure relief port is directly opposite to and connected to the pressure relief channel 111, by forming a pressure relief port at the center of the end face of the first cell 121 and the center of the end face of the second cell 131, it is ensured that when thermal runaway occurs, the first cell 121 and the second cell 131 can quickly relieve pressure through the pressure relief port and the pressure relief channel 111. It is also ensured that the emissions generated by the first cell 121 and the second cell 131 can accurately enter the corresponding pressure relief channel 111 and eventually flow out along the pressure relief channel 111, thereby ensuring the safe operation of the battery pack assembly 1.

[0040] According to one embodiment of the present invention, the inner wall of at least one pressure relief channel 111 is configured in a cross-sectional shape protruding away from the pressure relief port in the extending direction. Specifically, the inner wall of the pressure relief channel 111 is directly opposite to the pressure relief port on the corresponding first battery cell 121 and second battery cell 131, and the inner wall of the pressure relief channel 111 protrudes away from the pressure relief port, thereby forming a pressure relief space in the thickness direction of the base plate 11 between the inner wall of the pressure relief channel 111 and the directly opposite pressure relief port. This allows the first battery cell 121 and the second battery cell 131 to utilize the pressure relief space for precise pressure relief and the emission of harmful substances. Furthermore, by forming a pressure relief space between the inner wall of the pressure relief channel 111 and the directly opposite pressure relief port, the present invention also makes the structure of the base plate 11, the pressure relief channel 111, the first battery cell 121, and the second battery cell 131 more compact, thereby improving the space utilization rate within the battery pack assembly 1 and facilitating the installation and arrangement of the battery pack assembly 1.

[0041] In one specific embodiment of the present invention, the inner wall of the pressure relief channel 111 has an arc-shaped cross-section in the extending direction to improve the smooth flow of the discharged material and optimize the working performance of the pressure relief channel 111.

[0042] According to one embodiment of the present invention, the battery pack assembly 1 further includes an explosion-proof valve 14. The explosion-proof valve 14 has the function of preventing explosion of the battery pack assembly 1. In this embodiment, the explosion-proof valve 14 is disposed at the pressure relief port. The explosion-proof valve 14 can selectively open the pressure relief port. When the first cell 121 or the second cell 131 experiences thermal runaway, resulting in an increase in temperature and pressure, the explosion-proof valve 14 opens the pressure relief port. At this time, the material ejected from the first cell 121 or the second cell 131 through the pressure relief port can smoothly enter the corresponding pressure relief channel 111 and flow out of the battery pack assembly 1 along the pressure relief channel 111. This realizes the directional discharge of the material ejected when a single first cell 121 or second cell 131 experiences thermal runaway, thereby improving the safety of the first cell 121 and the second cell 131 on adjacent pressure relief channels 111 and extending the service life of the battery pack assembly 1.

[0043] In one specific embodiment of the present invention, the explosion-proof valve 14 is disposed toward the pressure relief channel 111 to ensure that when the first cell 121 or the second cell 131 experiences thermal runaway, harmful substances can be directly ejected into the pressure relief channel 111 and discharged from the battery pack assembly 1 through the pressure relief channel 111, thereby reducing the spread rate of heat diffusion and improving the safety performance of the battery pack assembly 1.

[0044] According to one embodiment of the present invention, the diameters of the first battery cell 121 and the second battery cell 131 are d1, the width of the explosion-proof valve 14 is d2, and the width of a single pressure relief channel 111 is d3, satisfying that d2 < d3 < d1. By setting the size relationship between the diameters of the first battery cell 121 and the second battery cell 131, the width of the explosion-proof valve 14, and the width of a single pressure relief channel 111 within the above-mentioned range, the width of the pressure relief channel 111 is made reasonable. This ensures that the pressure relief channel 111 covers the pressure relief range of the corresponding pressure relief port while also preventing the discharge material in the pressure relief channel 111 from overflowing to the outer periphery of the first battery cell 121 or the second battery cell 131, thereby improving the safety of the first battery cell 121 and the second battery cell 131. Furthermore, it ensures that after the discharge material is ejected from the pressure relief port, it can be smoothly discharged from the battery pack assembly 1 along the pressure relief channel 111, thereby improving the overall safety of the battery pack assembly 1.

[0045] According to one embodiment of the present invention, the inner wall of the pressure relief channel 111 is provided with a high-temperature resistant coating. Since the gases and other substances generated when the first cell 121 or the second cell 131 undergoes thermal runaway are at high temperatures, by providing a high-temperature resistant coating on the inner wall of the pressure relief channel 111, on the one hand, the high-temperature resistant coating can cool the thermal runaway emissions, thereby reducing heat in a timely manner and improving the safety within the battery pack assembly 1; on the other hand, by providing a high-temperature resistant coating on the inner wall of the pressure relief channel 111, the high-temperature resistant coating can provide high-temperature resistance and corrosion protection for the pressure relief channel 111 and the base plate 11, thereby improving the high-temperature resistance of the pressure relief channel 111, ensuring the reliable operation of the pressure relief channel 111, and extending the service life of the pressure relief channel 111 and the base plate 11.

[0046] The power equipment according to the present invention is briefly described below.

[0047] The power equipment according to the present invention is provided with a battery pack assembly 1 as described in any of the above embodiments. Since the power equipment according to the present invention is provided with a battery pack assembly 1 as described in any of the above embodiments, the battery pack assembly 1 in the power equipment is provided with multiple pressure relief channels 111, so that when different first cells 121 and different second cells 131 experience thermal runaway, they can have more independent pressure relief space, thereby improving the overall thermal runaway prevention performance of the battery pack assembly 1, thereby improving the safety of the power equipment and providing a better user experience.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0050] In the description of this invention, "a plurality of" means two or more.

[0051] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0052] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack assembly, characterized in that, include: A base plate having a plurality of pressure relief channels spaced apart in a first direction and extending in a second direction; A first battery cell column and a second battery cell column, wherein the first battery cell column is provided with a plurality of first battery cells arranged sequentially in a first direction, and the second battery cell column is provided with a plurality of second battery cells arranged sequentially in a first direction, and the first battery cell column and the second battery cell column are arranged sequentially in a second direction; in The first battery cell and the second battery cell are respectively formed with pressure relief ports, and the same pressure relief channel is directly opposite to the pressure relief port of at least one first battery cell and the pressure relief port of at least one second battery cell; Both the first and second battery cell columns are constructed in multiples, and the multiple first battery cell columns and the multiple second battery cell columns are arranged alternately along the second direction. The pressure relief ports of two adjacent first cells in the second direction and the pressure relief port of the second cell located between the two first cells are connected to the same pressure relief channel; in The pressure relief ports of the two first cells face each other in the second direction, and the pressure relief port of the second cell is located on one side of the pressure relief port of the first cell in the first direction; Each of the pressure relief channels is constructed as a curve or broken line extending in the second direction.

2. The battery pack assembly according to claim 1, characterized in that, Both the first battery cell and the second battery cell are constructed as cylindrical battery cells or both are constructed as polygonal prism battery cells, and the pressure relief port is formed at the center of the end face of the first battery cell and the center of the end face of the second battery cell.

3. The battery pack assembly according to claim 1, characterized in that, At least one of the inner walls of the pressure relief channel is configured in the extension direction to bulge outwards in a direction away from the pressure relief port.

4. The battery pack assembly according to claim 1, characterized in that, Also includes: An explosion-proof valve is provided at the pressure relief port.

5. The battery pack assembly according to claim 4, characterized in that, The diameters of the first and second battery cells are d1, the width of the explosion-proof valve is d2, and the width of a single pressure relief channel is d3, satisfying the following: d2 < d3 < d1.

6. The battery pack assembly according to claim 5, characterized in that, The inner wall of the pressure relief channel is coated with a high-temperature resistant coating.

7. A power equipment, characterized in that, Includes the battery pack assembly as described in any one of claims 1-6.

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