Battery Pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery pack, which comprises a battery box and a fire extinguishing component. A plurality of battery cells are arranged in the battery box, and the fire extinguishing component comprises an atomizing nozzle and a connecting pipe. The atomizing nozzle is arranged on the battery box, and an inlet of the atomizing nozzle is used to be connected with a fire extinguishing agent supply source. The connecting pipe is arranged in the battery box, and the connecting pipe is connected with an outlet of the atomizing nozzle. A plurality of spray holes are arranged on the connecting pipe, and each spray hole is respectively arranged toward a corresponding battery cell. When thermal runaway occurs in one or several battery cells, the fire extinguishing agent can be sprayed toward each battery cell through the plurality of spray holes, thereby improving the timeliness and effectiveness of fire extinguishing. Moreover, the atomizing nozzle can atomize the fire extinguishing agent, thereby further improving the timeliness of fire extinguishing.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] With the rapid development of energy storage technology, energy storage battery packs are widely used in various scenarios. However, there is a risk of thermal runaway of the battery cells during the charging and discharging process of energy storage battery packs. Once thermal runaway occurs, it will seriously threaten the safety of the energy storage battery pack.

[0003] The fire extinguishing method of traditional energy storage battery packs is mainly aimed at battery clusters or battery packs. When the battery cell with thermal runaway is far away from the fire extinguishing point, it is impossible to quickly extinguish the battery cell with thermal runaway, which reduces the timeliness and effectiveness of fire extinguishing. In addition, the fire extinguishing method of traditional energy storage battery packs is usually to open a through hole in the battery box (the location of the through hole is the location of the fire extinguishing point), and the through hole is connected to the fire extinguishing agent supply source (fire extinguishing tank or fire hose, etc.) through a connecting pipe. When a battery cell in the battery box has thermal runaway, the fire extinguishing agent enters the battery box through the through hole. In order to ensure that the fire extinguishing agent can quickly enter the battery box, the aperture of the through hole is usually large, which makes the fire extinguishing agent absorb heat and evaporate slowly after entering the battery box, thereby reducing the timeliness of fire extinguishing.

[0004] Therefore, it is urgent to propose a battery pack to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a battery pack, when one or several battery cells have thermal runaway, the fire extinguishing agent can be sprayed to each battery cell through multiple spray holes, thereby improving the timeliness and effectiveness of fire extinguishing, and the atomizing nozzle can atomize the fire extinguishing agent, which has the effect of further improving the timeliness of fire extinguishing.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Battery pack, including:

[0008] A battery box, wherein a plurality of battery cells are arranged in the battery box;

[0009] The fire extinguishing assembly includes an atomizing nozzle and a connecting pipe. The atomizing nozzle is arranged on the battery box. The inlet of the atomizing nozzle is used to connect with the fire extinguishing agent supply source. The connecting pipe is arranged in the battery box. The connecting pipe is connected with the outlet of the atomizing nozzle. The connecting pipe is provided with a plurality of spray holes, and each spray hole is respectively arranged toward a corresponding battery cell.

[0010] Optionally, each battery cell is provided with an explosion-proof valve, and each spray hole is arranged opposite to a corresponding explosion-proof valve.

[0011] Optionally, the battery box includes a box body and a box cover, the box body and the box cover are snap-fitted together, a plurality of battery cells are arranged in the box body, and the connecting pipe is arranged on a side of the box cover facing the box body.

[0012] Optionally, the fire extinguishing assembly further includes a positioning member, and the connecting pipe is arranged on a side of the box cover facing the box body through the positioning member.

[0013] Optionally, the positioning member includes a first positioning portion and two second positioning portions, the first positioning portion is provided with a through slot, the slot of the through slot faces the box cover, the connecting pipe is passed through the through slot, the two side edges of the through slot are respectively connected to a corresponding second positioning portion, and the two second positioning portions are both connected to the box cover.

[0014] Optionally, the width of the through groove is greater than the outer diameter of the connecting pipe.

[0015] Optionally, some battery cells are arranged in sequence along a first direction to form battery cell rows, the number of battery cell rows is at least two, at least two battery cell rows are arranged in sequence along a second direction, the first direction is perpendicular to the second direction, the connecting tube includes a first connecting tube, the axis of the first connecting tube is parallel to the first direction, the number of first connecting tubes is equal to the number of battery cell rows and corresponds one to one, the spray holes are opened on the first connecting tube, and the number of spray holes on each first connecting tube is equal to the number of battery cells in a corresponding battery cell row and corresponds one to one.

[0016] Optionally, the connecting pipe further includes a second connecting pipe, at least two first connecting pipes are connected to the second connecting pipe, and the second connecting pipe is connected to the outlet of the atomizing nozzle.

[0017] Optionally, the axis of the second connecting pipe is parallel to the second direction.

[0018] Optionally, the battery box includes a box body and a box cover, the connecting pipe also includes a third connecting pipe, the box body and the box cover are snap-fitted together, the atomizing nozzle is arranged on the box body, the first connecting pipe and the second connecting pipe are both arranged on the side of the box cover facing the box body, and the second connecting pipe is connected to the outlet of the atomizing nozzle through the third connecting pipe.

[0019] Beneficial effects of the utility model:

[0020] The battery pack provided by the utility model has an atomizing nozzle arranged on the battery box, a connecting pipe arranged in the battery box, a plurality of spray holes arranged on the connecting pipe, each spray hole is arranged toward a corresponding battery cell, the inlet of the atomizing nozzle is used to communicate with the fire extinguishing agent supply source, and the outlet of the atomizing nozzle is connected with the connecting pipe. The structural design enables each battery cell to be arranged relative to a corresponding spray hole. When one or several battery cells have thermal runaway, the fire extinguishing agent can be sprayed to each battery cell through the plurality of spray holes, thereby improving the timeliness and effectiveness of fire extinguishing. In addition, the atomizing nozzle can atomize the fire extinguishing agent, so that the particle diameter of the fire extinguishing agent entering the connecting pipe is smaller, thereby expanding the contact area between the fire extinguishing agent sprayed from the spray hole and the surrounding medium, so that the fire extinguishing agent sprayed from the spray hole can quickly absorb heat and evaporate, which has the effect of further improving the timeliness of fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the exploded structure of the battery pack provided by the embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the assembly structure of the box cover and the first connecting pipe provided in an embodiment of the utility model;

[0023] Figure 3 yes Figure 2 A local enlarged view of point A in FIG.

[0024] Figure 4 It is a schematic diagram of the structure of the battery pack provided by the embodiment of the utility model without showing the box cover;

[0025] Figure 5 It is a schematic diagram of the assembly structure of a box body and multiple battery cells provided in an embodiment of the utility model.

[0026] In the figure:

[0027] 110, box body; 120, box cover; 200, battery cell row; 210, battery cell; 211, explosion-proof valve; 310, atomizing nozzle; 321, first connecting pipe; 3211, spray hole; 322, second connecting pipe; 323, third connecting pipe; 330, positioning member; 331, first positioning portion; 3311, through groove; 332, second positioning portion. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] The present embodiment provides a battery pack. When thermal runaway occurs in one or several battery cells, the fire extinguishing agent can be sprayed toward each battery cell through multiple spray holes, thereby improving the timeliness and effectiveness of fire extinguishing. In addition, the atomizing nozzle can atomize the fire extinguishing agent, thereby further improving the timeliness of fire extinguishing.

[0033] Specifically, Figures 1 to 4 As shown, the battery pack includes a battery box and a fire extinguishing assembly, wherein a plurality of battery cells 210 are arranged in the battery box, and the fire extinguishing assembly includes an atomizing nozzle 310 and a connecting pipe, the atomizing nozzle 310 is arranged on the battery box, the inlet of the atomizing nozzle 310 is used to connect with a fire extinguishing agent supply source (not shown in the figure), the connecting pipe is arranged in the battery box, the connecting pipe is connected with the outlet of the atomizing nozzle 310, and a plurality of spray holes 3211 are arranged on the connecting pipe, and each spray hole 3211 is respectively arranged toward a corresponding battery cell 210.

[0034] Based on the above design, an atomizing nozzle 310 is arranged on the battery box, and a connecting pipe is arranged in the battery box. A plurality of spray holes 3211 are arranged on the connecting pipe, and each spray hole 3211 is arranged toward a corresponding battery cell 210. The inlet of the atomizing nozzle 310 is used to communicate with the fire extinguishing agent supply source, and the outlet of the atomizing nozzle 310 is connected with the connecting pipe. This structural design enables each battery cell 210 to be arranged relative to a corresponding spray hole 3211. When one or several battery cells 210 have thermal runaway, the fire extinguishing agent can be sprayed toward each battery cell 210 through the plurality of spray holes 3211, so as to achieve the effect of rapid cooling and fire extinguishing, thereby improving the timeliness and effectiveness of fire extinguishing. In addition, the atomizing nozzle 310 can atomize the fire extinguishing agent, so that the particle diameter of the fire extinguishing agent entering the connecting pipe is smaller, thereby expanding the contact area between the fire extinguishing agent sprayed from the spray hole 3211 and the surrounding medium, so that the fire extinguishing agent sprayed from the spray hole 3211 can quickly absorb heat and evaporate, which has the effect of further improving the timeliness of fire extinguishing.

[0035] It should be noted that the fire extinguishing agent supply source may be a fire extinguishing tank or a fire hose, etc., and the fire extinguishing agent may be gaseous or liquid. For example, the fire extinguishing agent may be water or perfluoroacetone or other common fire extinguishing materials, which will not be elaborated here.

[0036] It should also be pointed out that the specific structure and working principle of the atomizing nozzle 310 are prior arts in the art and will not be elaborated here.

[0037] Furthermore, the battery pack also includes a detection element, a booster pump and a controller. The detection element is arranged in the battery box. The detection element includes at least one of a temperature sensor, a combustible gas sensor and a smoke sensor. The detection element is used to monitor in real time whether a fire occurs in the battery box. The inlet of the atomizing nozzle 310 is connected to the fire extinguishing agent supply source through the booster pump. The detection element and the booster pump are both connected to the controller for communication. When the detection element detects that a fire occurs in the battery box, the controller controls the booster pump to start, so that the booster pump pumps the fire extinguishing agent in the fire extinguishing agent supply source to the atomizing nozzle 310, and the fire extinguishing agent atomized by the atomizing nozzle 310 is sprayed from each spray hole 3211 through the connecting pipe. It should be pointed out that the detection method of the above-mentioned detection element and the control method of the controller can adopt the existing technology in the field, which will not be repeated here.

[0038] Alternatively, if Figures 1 to 5As shown, each battery cell 210 is provided with an explosion-proof valve 211, and each spray hole 3211 is respectively arranged opposite to a corresponding explosion-proof valve 211. Usually, when a battery cell 210 has a thermal runaway, in order to allow the high-temperature and high-pressure substances (gas and / or particulate matter, etc.) in the battery cell 210 to be quickly discharged through the explosion-proof valve 211, the explosion-proof valve 211 is arranged at the center position of the thermal runaway of the battery cell 210 (i.e., the center position of the fire). Therefore, in this embodiment, the spray hole 3211 is arranged opposite to the explosion-proof valve 211, which is beneficial to the spray hole 3211 to discharge the high-temperature and high-pressure substances (gas and / or particulate matter, etc.) in the battery cell 210 quickly through the explosion-proof valve 211. The fire extinguishing agent sprayed from 211 quickly enters the battery cell 210 through the opened explosion-proof valve 211 to absorb the heat inside the battery cell 210. On the other hand, it is beneficial for the fire extinguishing agent that has not entered the battery cell 210 to quickly absorb the heat of the high-temperature and high-pressure material sprayed from the explosion-proof valve 211. When one or several battery cells 210 have thermal runaway, the fire extinguishing agent can be sprayed to the explosion-proof valve 211 of each battery cell 210 through multiple spray holes 3211, thereby achieving the effect of precise fire extinguishing and cooling, which can further improve the timeliness and effectiveness of fire extinguishing.

[0039] Alternatively, if Figures 1 to 5 As shown, the battery box includes a box body 110 and a box cover 120, the box body 110 and the box cover 120 are snap-fitted and connected, a plurality of battery cells 210 are arranged in the box body 110, and the connecting pipe is arranged on the side of the box cover 120 facing the box body 110 to achieve the fixing of the connecting pipe in the battery box. This structure of arranging the connecting pipe on the side of the box cover 120 facing the box body 110 eliminates the need to arrange a support structure for supporting the connecting pipe in the battery box, which has the effect of improving the internal space utilization of the battery box, and is conducive to improving the energy density of the battery pack. When the connecting pipe needs to be repaired or replaced, the box cover 120 can be removed for corresponding operations, which has a large operating space and can also avoid scratching the battery cells 210 in the battery box.

[0040] In this embodiment, the box body 110 and the box cover 120 are both made of sheet metal. Of course, in other implementation schemes, the box body 110 and the box cover 120 can also be made by other processes, which are not listed here one by one.

[0041] Furthermore, if Figures 1 to 5 As shown, the fire extinguishing assembly further includes a positioning member 330, and the connecting pipe is arranged on the side of the box cover 120 facing the box body 110 through the positioning member 330. The connecting pipe is arranged on the box cover 120 through the positioning member 330, which is conducive to improving the reliability and stability of the connection between the connecting pipe and the box cover 120, and at the same time can reduce the difficulty of assembling the connecting pipe and the box cover 120. Of course, in other embodiments, the connecting pipe and the box cover 120 can also be connected by bonding or integral injection molding.

[0042] It should be pointed out that in order to allow the fire extinguishing agent in the connecting pipe to be smoothly sprayed out from the spray hole 3211 , the positioning member 330 and the spray hole 3211 need to be staggered.

[0043] Furthermore, if Figures 1 to 5 As shown, the positioning member 330 includes a first positioning portion 331 and two second positioning portions 332. The first positioning portion 331 is provided with a through groove 3311, and the notch of the through groove 3311 faces the box cover 120. The connecting pipe is penetrated by the through groove 3311. The two side edges of the through groove 3311 are respectively connected to a corresponding second positioning portion 332. The two second positioning portions 332 are both connected to the box cover 120 so that the bottom of the through groove 3311 can support the connecting pipe. On the one hand, this structural design fixes the connecting pipe on the box cover 120. On the other hand, the two inner walls of the through groove 3311 can radially limit the connecting pipe, thereby preventing the connecting pipe from radially displacing when high-pressure fire extinguishing agent flows in the connecting pipe.

[0044] Furthermore, the width of the through groove 3311 is greater than the outer diameter of the connecting pipe, so as to facilitate the assembly of the connecting pipe and the first positioning portion 331 .

[0045] Alternatively, if Figures 1 to 5 As shown, some of the battery cells 210 are arranged in sequence along the first direction (the x direction in the figure) to form a battery cell row 200, the number of the battery cell rows 200 is at least two, and at least two battery cell rows 200 are arranged in sequence along the second direction (the y direction in the figure), that is, some of the battery cells 210 in the above-mentioned multiple battery cells 210 are arranged in sequence along the first direction to form a battery cell row 200, and another part of the battery cells 210 are arranged in sequence along the first direction to form another battery cell row 200, and so on, so that the multiple battery cells 210 form at least two battery cell rows 200, and at least two battery cell rows 200 are arranged in sequence along the second direction. The connecting tubes are arranged in sequence in the first direction and the second direction is perpendicular to each other. The connecting tubes include first connecting tubes 321. The axes of the first connecting tubes 321 are parallel to the first direction. The number of the first connecting tubes 321 is equal to and corresponds to the number of the battery cell rows 200. The spray holes 3211 are opened on the first connecting tubes 321. The number of the spray holes 3211 on each first connecting tube 321 is equal to and corresponds to the number of the battery cells 210 in a corresponding battery cell row 200. As a result, the space layout in the battery box is more regular, especially the layout of the connecting tubes, which is beneficial to improving the internal space utilization of the battery box.

[0046] In this embodiment, the number of the cell rows 200 is four, so the number of the first connecting tubes 321 is four; the number of the cells 210 in each cell row 200 is thirteen, so the number of the spray holes 3211 on each first connecting tube 321 is thirteen, and the number of the spray holes 3211 is fifty-two in total. Of course, in other embodiments, the cell rows 200 may be two, three, five or even more; the number of the cells 210 in the cell row 200 may be ten, fifteen or other, and the number of the cells 210 in different cell rows 200 may be the same or different, depending on the actual application.

[0047] Furthermore, if Figures 1 to 5 As shown, the connecting pipe also includes a second connecting pipe 322, at least two first connecting pipes 321 are connected to the second connecting pipe 322, and the second connecting pipe 322 is connected to the outlet of the atomizing nozzle 310, and the fire extinguishing agent atomized by the atomizing nozzle 310 enters the at least two first connecting pipes 321 through the second connecting pipe 322 to realize the transportation of the fire extinguishing agent. Compared with the at least two first connecting pipes 321 being respectively connected to the outlet of the atomizing nozzle 310, in this embodiment, at least two first connecting pipes 321 are connected to the outlet of the atomizing nozzle 310 through the second connecting pipe 322, which simplifies the layout of the pipelines connected to the outlet of the atomizing nozzle 310, and has the effect of further improving the internal space utilization of the battery box.

[0048] Furthermore, if Figures 1 to 5 As shown, the axis of the second connecting pipe 322 is parallel to the second direction, so that the layout of the second connecting pipe 322 in the battery box is relatively regular.

[0049] Alternatively, if Figures 1 to 5 As shown, the connecting pipe also includes a third connecting pipe 323, the axis of the third connecting pipe 323 is parallel to the third direction (z direction in the figure), the first direction, the second direction and the third direction are perpendicular to each other, the atomizing nozzle 310 is arranged on the box body 110, the first connecting pipe 321 and the second connecting pipe 322 are both arranged on the side of the box cover 120 facing the box body 110, and the second connecting pipe 322 is connected to the outlet of the atomizing nozzle 310 through the third connecting pipe 323, that is, the fire extinguishing agent atomized by the atomizing nozzle 310 passes through the third connecting pipe 323, the second connecting pipe 322 and the first connecting pipe 321 in sequence, and then is sprayed out from each spray hole 3211. The design of the third connecting pipe 323 makes the overall layout of the connecting pipe in the battery box more regular, further improving the internal space utilization of the battery box.

[0050] In this embodiment, the first direction is the length direction of the battery box, the second direction is the width direction of the battery box, and the third direction is the height direction of the battery box.

[0051] Furthermore, if Figures 1 to 5As shown, the first connecting pipe 321 is fixed to the side of the box cover 120 facing the box body 110 through the positioning member 330. Since the second connecting pipe 322 is connected to the first connecting pipe 321, and the second connecting pipe 322 is connected to the atomizing nozzle 310 through the third connecting pipe 323, the second connecting pipe 322 can be fixed to the side of the box cover 120 facing the box body 110 without the need to set the positioning member 330. This structural design omits the positioning member 330 for fixing the second connecting pipe 322, reduces the overall weight of the fire extinguishing assembly, and can further reduce the total weight of the battery pack, which has the effect of improving the energy density of the battery pack. Of course, in other embodiments, the positioning member 330 can also be set at the second connecting pipe 322, depending on the actual application requirements.

[0052] Furthermore, if Figures 1 to 5 As shown, each first connecting tube 321 is provided with a plurality of positioning members 330. For example, each first connecting tube 321 is provided with two, three or four positioning members 330. The plurality of positioning members 330 on each first connecting tube 321 are evenly distributed along the axial direction of the corresponding first connecting tube 321 to improve the stability and reliability of the connection between the first connecting tube 321 and the box cover 120, thereby ensuring that each spray hole 3211 can be directly arranged opposite to a corresponding explosion-proof valve 211, thereby providing a strong guarantee for the timeliness and effectiveness of fire extinguishing.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery pack, characterized in that: include: A battery box, wherein a plurality of battery cells (210) are arranged in the battery box; A fire extinguishing assembly, the fire extinguishing assembly comprising an atomizing nozzle (310) and a connecting pipe, the atomizing nozzle (310) being arranged on the battery box, the inlet of the atomizing nozzle (310) being used to communicate with a fire extinguishing agent supply source, the connecting pipe being arranged in the battery box, the connecting pipe being connected with the outlet of the atomizing nozzle (310), the connecting pipe being provided with a plurality of spray holes (3211), each of the spray holes (3211) being arranged facing a corresponding one of the battery cells (210).

2. The battery pack according to claim 1, characterized in that: Each of the battery cells (210) is provided with an explosion-proof valve (211), and each of the spray holes (3211) is arranged opposite to a corresponding explosion-proof valve (211).

3. The battery pack according to claim 1 or 2, characterized in that: The battery box comprises a box body (110) and a box cover (120); the box body (110) and the box cover (120) are snap-fitted and connected; a plurality of battery cells (210) are arranged in the box body (110); and the connecting pipe is arranged on a side of the box cover (120) facing the box body (110).

4. The battery pack according to claim 3, characterized in that: The fire extinguishing assembly further comprises a positioning member (330), and the connecting pipe is arranged on a side of the box cover (120) facing the box body (110) through the positioning member (330).

5. The battery pack according to claim 4, characterized in that: The positioning member (330) comprises a first positioning portion (331) and two second positioning portions (332); the first positioning portion (331) is provided with a through slot (3311); the notch of the through slot (3311) faces the box cover (120); the connecting pipe is passed through the through slot (3311); the two side edges of the through slot (3311) are respectively connected to a corresponding one of the second positioning portions (332); and the two second positioning portions (332) are both connected to the box cover (120).

6. The battery pack according to claim 5, characterized in that: The width of the through groove (3311) is greater than the outer diameter of the connecting pipe.

7. The battery pack according to claim 1 or 2, characterized in that: Some of the battery cells (210) are arranged in sequence along a first direction to form a battery cell row (200), the number of the battery cell rows (200) is at least two, at least two of the battery cell rows (200) are arranged in sequence along a second direction, the first direction is perpendicular to the second direction, the connecting tube comprises a first connecting tube (321), the axis of the first connecting tube (321) is parallel to the first direction, the number of the first connecting tubes (321) is equal to the number of the battery cell rows (200) and corresponds one to one, the spray holes (3211) are opened on the first connecting tube (321), the number of the spray holes (3211) on each of the first connecting tubes (321) is equal to the number of the battery cells (210) in a corresponding battery cell row (200) and corresponds one to one.

8. The battery pack according to claim 7, characterized in that: The connecting pipe further comprises a second connecting pipe (322), at least two of the first connecting pipes (321) are connected to the second connecting pipe (322), and the second connecting pipe (322) is connected to the outlet of the atomizing nozzle (310).

9. The battery pack according to claim 8, characterized in that: The axis of the second connecting pipe (322) is parallel to the second direction.

10. The battery pack according to claim 8, characterized in that: The battery box comprises a box body (110) and a box cover (120); the connecting pipe further comprises a third connecting pipe (323); the box body (110) and the box cover (120) are snap-fitted and connected; the atomizing nozzle (310) is arranged on the box body (110); the first connecting pipe (321) and the second connecting pipe (322) are both arranged on a side of the box cover (120) facing the box body (110); and the second connecting pipe (322) is connected to an outlet of the atomizing nozzle (310) through the third connecting pipe (323).

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