Battery pack shell

Abstract

The utility model discloses a battery pack shell. The battery pack shell comprises an upper shell and a lower shell, a mounting cavity with an upward opening is formed in the lower shell, a first reinforcing plate body is arranged in the mounting cavity, a first heat dissipation channel is formed in the first reinforcing plate body and extends in the length direction of the first reinforcing plate body, and a first through hole and a second through hole are formed in a side wall plate body of the lower shell; the first through hole is communicated with one end of the first heat dissipation channel, and the second through hole is communicated with the other end of the first heat dissipation channel. The first reinforcing plate body is arranged in the lower shell, so that the structural strength and rigidity of the lower shell can be effectively improved; according to the battery pack shell, the first heat dissipation channel is formed in the first reinforcing plate body, so that heat generated by the battery can be discharged from the first heat dissipation channel, the heat dissipation performance of the battery pack shell is effectively improved, and the situation of poor heat dissipation or thermal runaway of the battery is remarkably reduced.

Description

Technical Field

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

[0002] The current power battery has a high energy density and generally generates a lot of heat when discharged at high power. Power batteries are generally designed with cooling structures to dissipate heat, and most common cooling structures are in the form of cooling plates. However, as the upper limits of battery charging and discharging power continue to increase, the heat dissipation effect of the current cooling plate-type heat dissipation structure cannot meet the battery temperature requirements, resulting in the current power battery being prone to poor heat dissipation. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery pack housing with good heat dissipation performance.

[0004] According to the battery pack shell of the embodiment of the utility model, it includes: an upper shell and a lower shell; the lower shell has an installation cavity with an opening facing upward, the upper shell is used to close the opening, a first reinforcing plate is arranged in the installation cavity, at least one first reinforcing plate is provided, the first reinforcing plate extends along a first direction to divide the installation cavity into a plurality of battery compartments, a first heat dissipation channel is provided in the first reinforcing plate, the first heat dissipation channel extends along the length direction of the first reinforcing plate, a first through hole and a second through hole are provided on the side wall plate of the lower shell, the first through hole is connected to one end of the first heat dissipation channel, and the second through hole is connected to the other end of the first heat dissipation channel.

[0005] According to the battery pack shell of the embodiment of the utility model, by arranging a first reinforcing plate body inside the lower shell body, not only the structural strength and rigidity of the lower shell body can be effectively improved, but also the interior of the lower shell body can be divided into multiple battery compartments to facilitate the installation of the batteries; by arranging a first heat dissipation channel inside the first reinforcing plate body, the heat generated by the battery can be discharged from the first heat dissipation channel, which effectively improves the heat dissipation performance of the battery pack shell and significantly reduces the occurrence of poor heat dissipation or thermal runaway of the battery.

[0006] In addition, the battery pack housing according to the utility model may also have the following additional technical features:

[0007] In some embodiments, a plurality of heat dissipation members are disposed in the first heat dissipation channel; a plurality of first heat dissipation channels are disposed, and the plurality of first heat dissipation channels are spaced apart along a third direction; a plurality of first through holes and a plurality of second through holes are disposed, and the plurality of first through holes, the plurality of second through holes and the plurality of first heat dissipation channels correspond one to one, and the first direction and the third direction are perpendicular to each other.

[0008] In some embodiments, a second heat dissipation channel is provided in the side wall plate body, the second heat dissipation channel extends along the circumference of the lower shell body and is connected end to end, and the first through hole, the second through hole and the first heat dissipation channel are all connected to the second heat dissipation channel.

[0009] In some embodiments, a plurality of heat dissipation elements are disposed in the second heat dissipation channel.

[0010] In some embodiments, a plurality of the first heat dissipation channels and a plurality of the second heat dissipation channels are provided, the plurality of the second heat dissipation channels are arranged spaced apart along a third direction, the plurality of the second heat dissipation channels correspond one to one to the plurality of the first heat dissipation channels, and the first direction and the third direction are perpendicular to each other.

[0011] In some embodiments, the side wall plate body is provided with a first groove and a second groove recessed toward the mounting cavity, the first through hole is provided at the bottom of the first groove, the second through hole is provided at the bottom of the second groove, a first rotating shaft is provided in the first groove, and a second rotating shaft is provided in the second groove, the battery pack shell also includes a first baffle, a second baffle and a driving member, a first mounting hole is provided at one end of the first baffle, a second mounting hole is provided at one end of the second baffle, the first mounting hole cooperates with the first rotating shaft so that the first baffle can be rotatably provided in the first groove to open or close the first through hole, the second mounting hole cooperates with the second rotating shaft so that the second baffle can be rotatably provided in the second groove to open or close the second through hole, and the driving member is used to drive the first baffle and the second baffle to rotate.

[0012] In some embodiments, guide grooves are provided on the side walls of the first groove and the second groove, and guide portions are provided on the end of the first baffle away from the first mounting hole and the end of the second baffle away from the second mounting hole, and the guide portions include a guide protrusion and a step surface, the guide protrusion extends into the guide groove, and the step surface abuts against the side wall.

[0013] In some embodiments, a water guide hole is provided in the guide groove, one end of the water guide hole is connected to the guide groove, and the other end extends to the outer side surface of the lower shell.

[0014] In some embodiments, a second reinforcing plate is further arranged in the installation cavity, at least one second reinforcing plate is provided, and the second reinforcing plate extends along a second direction, and the first direction and the third direction are respectively perpendicular to the second direction.

[0015] In some embodiments, the heat sink is a heat sink fin.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view of the lower shell of the battery pack shell according to an embodiment of the utility model;

[0018] Figure 2 is based on Figure 1 Sectional view along line AA;

[0019] Figure 3 is a front view of the lower shell of the battery pack shell according to an embodiment of the utility model;

[0020] Figure 4 is based on Figure 3 Sectional view along the midline BB;

[0021] Figure 5 is based on Figure 3 Sectional view of the mid-CC line;

[0022] Figure 6 is based on Figure 3 Enlarged view of area D in the middle;

[0023] Figure 7 is based on Figure 4 Enlarged view of the middle E area;

[0024] Figure 8 is based on Figure 4 Enlarged view of the middle F area;

[0025] Fig. 9 is a front view of a first baffle of a battery pack housing according to an embodiment of the utility model;

[0026] Fig.10 is a side view of a first baffle of a battery pack housing according to an embodiment of the utility model;

[0027] Fig.11 is based on Fig.10 Magnified view of the middle G region.

[0028] Reference numerals:

[0029] 1. Lower housing; 11. First reinforcing plate; 12. Second reinforcing plate; 13. Battery compartment; 14. Side wall plate; 111. First heat dissipation channel; 141. First through hole; 142. Second through hole; 143. Second heat dissipation channel; 144. First groove; 1441. First rotating shaft; 1442. Guide groove; 14421. Water guide hole;

[0030] 2. Heat dissipation components;

[0031] 3. First baffle; 31. First mounting hole; 32. Guide portion; 321. Guide protrusion; 322. Step surface. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; 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.

[0036] Reference below Figure 1-Figure 11 A battery pack casing according to an embodiment of the present invention is described.

[0037] like Figures 1 to 11As shown, the battery pack shell according to the embodiment of the utility model includes: an upper shell and a lower shell 1; the lower shell 1 has an installation cavity with an opening facing upward, the upper shell is used to close the opening, a first reinforcing plate 11 is arranged in the installation cavity, the first reinforcing plate 11 is provided with at least one, the first reinforcing plate 11 extends along a first direction to divide the installation cavity into a plurality of battery compartments 13, a first heat dissipation channel 111 is provided in the first reinforcing plate 11, the first heat dissipation channel 111 extends along the length direction of the first reinforcing plate 11, a first through hole 141 and a second through hole 142 are provided on the side wall plate 14 of the lower shell 1, the first through hole 141 is connected to one end of the first heat dissipation channel 111, and the second through hole 142 is connected to the other end of the first heat dissipation channel 111.

[0038] In this embodiment, the first reinforcing plate 11 can effectively strengthen the structural strength and rigidity of the lower shell 1, and improve the overall safety performance of the battery pack shell. At the same time, the first reinforcing plate 11 can divide the installation cavity inside the lower shell 1 into multiple battery compartments 13, which not only facilitates the installation of the battery, but also divides the battery installation into zones, which is convenient for the zoned management of the battery. In addition, when the battery in any battery compartment 13 has thermal runaway, the first reinforcing plate 11 can play a heat insulating role, thereby preventing the spread of thermal runaway.

[0039] Furthermore, the heat generated by the batteries in the battery compartment 13 can enter the first heat dissipation channel 111 and be promptly discharged from the battery pack shell through the first heat dissipation channel 111. Such a design can effectively improve the heat dissipation performance of the battery pack shell and reduce the occurrence of poor heat dissipation or thermal runaway of the battery pack; the first through hole 141 and the second through hole 142 are respectively connected to the two ends of the first heat dissipation channel 111, so that the air in the external environment can continuously enter the first heat dissipation channel 111 through the first through hole 141 or the second through hole 142, and flow out from the first through hole 141 or the second through hole 142, so as to continuously bring out the heat in the first heat dissipation channel 111, thereby completing the heat dissipation of the battery.

[0040] In a specific embodiment, for example Figure 1 , Figure 4 and Figure 6As shown, a first heat dissipation channel 111 is provided in the first reinforcing plate body 11, and the first heat dissipation channel 111 extends along the length direction of the first reinforcing plate body 11, so that the heat dissipation area of ​​the first heat dissipation channel 111 can be increased, thereby improving the heat dissipation effect of the first heat dissipation channel 111; in the first direction, the two side wall plates 14 of the lower shell 1 are respectively provided with a first through hole 141 and a second through hole 142, and the first through hole 141 and the second plate body are respectively connected to the two ends of the first heat dissipation channel 111, so that the air in the external environment can continuously enter the first heat dissipation channel 111 through the first through hole 141 or the second through hole 142, and flow out from the first channel or the second channel to continuously take out the heat in the first heat dissipation channel 111, and at the same time, the air only flows in the first heat dissipation channel 111 along the first direction, the air flow resistance is small, and the air flow rate is high, which can speed up the speed of taking away the heat in the first heat dissipation channel 111, thereby further improving the heat dissipation effect.

[0041] According to the battery pack shell of the embodiment of the utility model, by arranging a first reinforcing plate 11 in the lower shell 1, not only the structural strength and rigidity of the lower shell 1 can be effectively improved, but also the interior of the lower shell 1 can be divided into multiple battery compartments 13 to facilitate the installation of batteries; by arranging a first heat dissipation channel 111 in the first reinforcing plate 11, the heat generated by the battery can be discharged from the first heat dissipation channel 111, which effectively improves the heat dissipation performance of the battery pack shell and significantly reduces the occurrence of poor heat dissipation or thermal runaway of the battery.

[0042] In one embodiment of the present invention, Figures 1 to 11 As shown, a plurality of heat sinks 2 are arranged in the first heat dissipation channel 111. In this embodiment, the heat sink 2 can effectively absorb the heat generated by the battery so that the flowing air can take away the heat, further improving the heat dissipation effect and effectively avoiding the accumulation of heat in the battery compartment 13, resulting in poor heat dissipation of the battery.

[0043] In one embodiment of the present invention, Figures 1 to 11 As shown, a plurality of first heat dissipation channels 111 are provided, and the plurality of first heat dissipation channels 111 are arranged spaced apart along the third direction. A plurality of first through holes 141 and a plurality of second through holes 142 are provided, and the plurality of first through holes 141, the plurality of second through holes 142 and the plurality of first heat dissipation channels 111 correspond to each other one by one, and the first direction and the third direction are perpendicular to each other.

[0044] In this embodiment, the provision of multiple first heat dissipation channels 111 can effectively increase the heat dissipation area, thereby effectively improving the heat dissipation effect; for example Figure 2As shown, three first heat dissipation channels 111 are arranged on the first reinforcing plate body 11, and the three first heat dissipation channels 111 are arranged spaced apart along the third direction. Both ends of each first heat dissipation channel 111 are respectively connected to a first through hole 141 and a second through hole 142. In this way, the three first heat dissipation channels 111 do not interfere with each other and work independently, thereby effectively improving the heat dissipation efficiency.

[0045] In a specific embodiment of the present invention, Figures 1 to 11 As shown, a second reinforcing plate 12 is further arranged in the installation cavity, at least one second reinforcing plate 12 is provided, and the second reinforcing plate 12 extends along the second direction, and the first direction and the third direction are respectively perpendicular to the second direction.

[0046] In a specific embodiment, for example Figure 1 As shown, a first reinforcing plate 11 and two second reinforcing plates 12 are provided in the lower shell 1, wherein the first reinforcing plate 11 extends along the first direction and is provided in the middle of the lower shell 1, and the two second reinforcing plates 12 both extend along the second direction, and the first reinforcing plate 11 and the second reinforcing plate 12 are arranged perpendicular to each other to divide the installation cavity into four battery compartments 13, so that it is not only convenient to install the battery, but also can enhance the structural strength and rigidity of the lower shell 1.

[0047] In one embodiment of the present invention, Figures 1 to 11 As shown, a second heat dissipation channel 143 is provided in the side wall plate 14 , and the second heat dissipation channel 143 extends along the circumference of the lower shell 1 and is connected end to end. The first through hole 141 , the second through hole 142 and the first heat dissipation channel 111 are all connected to the second heat dissipation channel 143 .

[0048] In this embodiment, the provision of the second heat dissipation channel 143 can further improve the heat dissipation performance of the battery pack housing; for example Figure 4 , Figure 7 and Figure 8 As shown, the second heat dissipation channel 143 is arranged in the circumferential side wall plate body 14 of the lower shell body 1, and surrounds the lower shell body 1 for a week, and is connected end to end. In this way, not only the heat dissipation area of ​​the second heat dissipation channel 143 can be improved, but also because the surroundings of the second heat dissipation channel 143 are closer to the external environment, therefore, the heat entering the second heat dissipation channel 143 can not only be taken away by the flowing air, but also be dissipated to the external environment through the side wall plate body 14, which significantly improves the heat dissipation efficiency of the second heat dissipation channel 143.

[0049] Furthermore, for example Figure 7 and Figure 8As shown, the first through hole 141, the second through hole 142 and the first heat dissipation channel 111 are all connected to the second heat dissipation channel 143. In this way, the air in the external environment only needs to pass through the first through hole 141 or the second through hole 142 to enter the first heat dissipation through hole and the second heat dissipation channel 143. Such a structural design is simpler, more practical and easier to manufacture.

[0050] In a specific embodiment of the present invention, Figures 1 to 11 As shown, a plurality of heat sinks 2 are arranged in the second heat dissipation channel 143. In this specific embodiment, the heat sink 2 can effectively absorb the heat generated by the battery so that the flowing air can take away the heat, further improving the heat dissipation effect and effectively avoiding the accumulation of heat in the battery compartment 13, resulting in poor heat dissipation of the battery.

[0051] In a specific embodiment, the heat sink 2 is a heat sink fin.

[0052] In a specific embodiment of the present invention, Figures 1 to 11 As shown, a plurality of first heat dissipation channels 111 and a plurality of second heat dissipation channels 143 are provided, and the plurality of second heat dissipation channels 143 are arranged spaced apart along the third direction, and the plurality of second heat dissipation channels 143 correspond to the plurality of first heat dissipation channels 111 one by one, and the first direction and the third direction are perpendicular to each other.

[0053] In this specific embodiment, the arrangement of the plurality of first heat dissipation channels 111 and the plurality of second heat dissipation channels 143 can effectively increase the heat dissipation area, thereby effectively improving the heat dissipation effect; for example Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, three first heat dissipation channels 111 are arranged on the first reinforcing plate body 11, and three second heat dissipation channels 143 are arranged in the side wall plate body 14 of the lower shell body 1. The three first heat dissipation channels 111 and the three second heat dissipation channels 143 are arranged at intervals along the third direction, and the first heat dissipation channels 111 and the second heat dissipation channels 143 located in the same plane are connected. At the same time, the first heat dissipation channels 111 and the second heat dissipation channels 143 located in the same plane are connected with the same first through hole 141 and the same second through hole 142. In this way, the first heat dissipation channels 111 and the second heat dissipation channels 143 located in different planes do not interfere with each other, and work independently, which can effectively improve the heat dissipation efficiency.

[0054] In one embodiment of the present invention, Figures 1 to 11As shown, the side wall plate 14 is provided with a first groove 144 and a second groove which are recessed toward the mounting cavity, the first through hole 141 is provided at the bottom of the first groove 144, the second through hole 142 is provided at the bottom of the second groove, the first groove 144 is provided with a first rotating shaft 1441, the second groove is provided with a second rotating shaft, the battery pack shell also includes a first baffle 3, a second baffle and a driving member, one end of the first baffle 3 is provided with a first mounting hole 31, one end of the second baffle is provided with a second mounting hole, the first mounting hole 31 cooperates with the first rotating shaft 1441 so that the first baffle 3 can be rotatably provided in the first groove 144 to open or close the first through hole 141, the second mounting hole cooperates with the second rotating shaft so that the second baffle can be rotatably provided in the second groove to open or close the second through hole 142, and the driving member is used to drive the first baffle 3 and the second baffle to rotate.

[0055] In the present embodiment, the setting of the first groove 144 and the second groove provides an installation space for the setting of the first baffle 3 and the second baffle, which can prevent the first baffle 3 and the second baffle from protruding from the side wall plate body 14, which not only reduces the space occupied by the first baffle 3 and the second baffle and improves the space utilization rate, but also enhances the protection of the first baffle 3 and the second baffle to prevent the first baffle 3 and the second baffle from being damaged by collision; the driving member can drive the first baffle 3 to open or close the first through hole 141, and the driving member can drive the second baffle to open or close the second through hole 142, so that when the battery needs to dissipate heat, the first baffle 3 and the second baffle respectively open the first through hole 141 and the second through hole 142, so that the air from the external environment enters the first heat dissipation channel 111 and the second heat dissipation channel 143 to take away the heat, thereby accelerating the cooling of the battery; when the battery does not need to dissipate heat, or the battery needs to be kept warm to reduce heat loss, the first baffle 3 and the second baffle respectively close the first through hole 141 and the second through hole 142.

[0056] In a specific embodiment, the driving member can be a driving motor, a magnetic attraction device, etc.

[0057] In a specific embodiment of the present invention, Figures 1 to 11 As shown, guide grooves 1442 are provided on the side walls of the first groove 144 and the second groove, and guide portions 32 are provided on the end of the first baffle plate 3 away from the first mounting hole 31 and the end of the second baffle plate away from the second mounting hole, and the guide portion 32 includes a guide protrusion 321 and a step surface 322, the guide protrusion 321 extends into the guide groove 1442, and the step surface 322 abuts against the side wall.

[0058] In a specific embodiment, for example Figure 3 and Figure 6As shown, the first groove 144 and the second groove are both fan-shaped grooves, and an arc-shaped guide groove 1442 is arranged on the arc-shaped side wall of the fan-shaped groove. The end of the first baffle plate 3 away from the first mounting hole 31 and the end of the second baffle plate away from the second mounting hole are both provided with a guide protrusion 321 and a step surface 322. The step surface 322 has a certain curvature so as to cooperate with the arc-shaped side wall. The guide protrusion 321 extends into the arc-shaped guide groove 1442, and the step surface 322 abuts against the arc-shaped side wall. In this way, when the first baffle plate 3 and the second baffle plate rotate, the arc-shaped guide groove 1442 can limit and guide the first baffle plate 3 and the second baffle plate, which can not only make the rotation of the first baffle plate 3 and the second baffle plate more stable and smooth, but also reduce the deformation of the first baffle plate 3 and the second baffle plate, thereby ensuring the stability of the overall structure.

[0059] In a specific embodiment of the present invention, Figures 1 to 11 As shown, a water guide hole 14421 is provided in the guide groove 1442, one end of the water guide hole 14421 is connected to the guide groove 1442, and the other end extends to the outer side surface of the lower shell 1, so that the accumulated water or dust in the guide groove 1442 can be discharged from the water guide hole 14421, or when the first baffle 3 or the second baffle is rotated, the accumulated water and dust in the guide groove 1442 can be swept into the water guide hole 14421 to discharge the accumulated water and dust from the guide groove 1442. By setting the water guide hole 14421, it can effectively prevent the accumulated water or dust from affecting the normal rotation of the first baffle 3 and the second baffle.

[0060] Other structures and operations of the battery pack housing according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack housing, characterized in that: include: Upper shell; A lower shell, wherein the lower shell has an installation cavity with an opening facing upward, and the upper shell is used to close the opening. A first reinforcing plate is arranged in the installation cavity, and at least one first reinforcing plate is provided. The first reinforcing plate extends along a first direction to divide the installation cavity into a plurality of battery compartments. A first heat dissipation channel is provided in the first reinforcing plate, and the first heat dissipation channel extends along the length direction of the first reinforcing plate. A first through hole and a second through hole are provided on the side wall plate of the lower shell, the first through hole is communicated with one end of the first heat dissipation channel, and the second through hole is communicated with the other end of the first heat dissipation channel.

2. The battery pack housing according to claim 1, characterized in that: A plurality of heat dissipation parts are arranged in the first heat dissipation channel; a plurality of the first heat dissipation channels are arranged in a spaced relationship along a third direction; a plurality of the first through holes and a plurality of the second through holes are each provided in a plurality; the plurality of the first through holes, the plurality of the second through holes and the plurality of the first heat dissipation channels correspond one to one, and the first direction and the third direction are perpendicular to each other.

3. The battery pack housing according to claim 1, characterized in that: A second heat dissipation channel is disposed in the side wall plate body. The second heat dissipation channel extends along the circumference of the lower shell and is connected end to end. The first through hole, the second through hole and the first heat dissipation channel are all connected to the second heat dissipation channel.

4. The battery pack housing according to claim 3, characterized in that: A plurality of heat dissipation elements are arranged in the second heat dissipation channel.

5. The battery pack housing according to claim 3, characterized in that: A plurality of the first heat dissipation channels and a plurality of the second heat dissipation channels are provided, and the plurality of the second heat dissipation channels are arranged at intervals along a third direction, and the plurality of the second heat dissipation channels correspond to the plurality of the first heat dissipation channels one by one, and the first direction and the third direction are perpendicular to each other.

6. The battery pack housing according to claim 1, characterized in that: The side wall plate body is provided with a first groove and a second groove recessed toward the installation cavity, the first through hole is provided at the bottom of the first groove, and the second through hole is provided at the bottom of the second groove. A first rotating shaft is arranged in the first groove, and a second rotating shaft is arranged in the second groove. The battery pack shell also includes a first baffle, a second baffle and a driving member. A first mounting hole is arranged at one end of the first baffle, and a second mounting hole is arranged at one end of the second baffle. The first mounting hole cooperates with the first rotating shaft so that the first baffle can be rotatably arranged in the first groove to open or close the first through hole. The second mounting hole cooperates with the second rotating shaft so that the second baffle can be rotatably arranged in the second groove to open or close the second through hole. The driving member is used to drive the first baffle and the second baffle to rotate.

7. The battery pack casing according to claim 6, characterized in that: Guide grooves are provided on the side walls of the first groove and the second groove, and guide parts are provided on the end of the first baffle away from the first mounting hole and the end of the second baffle away from the second mounting hole, and the guide parts include a guide protrusion and a step surface, the guide protrusion extends into the guide groove, and the step surface abuts against the side wall.

8. The battery pack casing according to claim 7, characterized in that: A water guide hole is arranged in the guide groove, one end of the water guide hole is communicated with the guide groove, and the other end of the water guide hole extends to the outer side surface of the lower shell.

9. The battery pack casing according to claim 2, characterized in that: A second reinforcing plate is also arranged in the installation cavity. At least one second reinforcing plate is provided. The second reinforcing plate extends along a second direction. The first direction and the third direction are respectively perpendicular to the second direction.

10. The battery pack housing according to claim 2, characterized in that: The heat sink is a heat sink fin.

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