Battery packs and electrical equipment

Abstract

The present disclosure relates to a battery pack and an electrical device, the battery pack comprising: a shell, a housing cavity is provided in the shell, the housing cavity is connected with an air inlet and an air outlet; a battery cell, a plurality of the battery cells are stacked in the housing cavity; an air duct member, the air duct member is arranged on at least one side of the battery cell intersecting with the stacking direction, the air duct member is provided with an air duct connected with the air inlet and the air outlet; and a spoiler channel, the spoiler channel is located at the air inlet end of the air duct and is connected with the air inlet, so that the gas entering the housing cavity flows to a plurality of the air ducts. The air duct member of the present disclosure is provided with an air duct for cooling wind to pass through, so as to cool down the battery cell, the air duct is connected with the air inlet and the air outlet, and the cooling wind entering the housing cavity is evenly distributed through the spoiler channel, so that the cooling wind can enter the plurality of air ducts more evenly, so that the cooling effect of the battery cell is better.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular, to a battery pack and an electrical device. Background Art

[0002] Since the battery releases a large amount of heat during the charging and discharging process, if this heat cannot be discharged in time, it will cause heat accumulation, resulting in safety problems. In addition, the increase in temperature will also affect the rate performance and service life of the battery cell, thereby reducing the reliability, safety and service life of the battery system.

[0003] Currently, most battery cells are cooled by setting air ducts between the battery cells. However, there are a large number of air ducts, and it is difficult for cooling air to flow evenly into each air duct, resulting in poor cooling effect of the battery cells. Summary of the invention

[0004] The purpose of the present disclosure is to provide a battery pack and an electrical device, which can solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a battery pack, comprising: a shell, a accommodating cavity is provided in the shell, and the accommodating cavity is connected to an air inlet and an air outlet; a battery cell, a plurality of the battery cells are stacked in the accommodating cavity; a plurality of air duct members are provided, the air duct members are arranged on at least one side of the battery cell intersecting with the stacking direction, and the air duct member is provided with an air duct connected to the air inlet and the air outlet; and a spoiler channel is provided in the accommodating cavity, the spoiler channel is located at the air inlet end of the air duct and is connected to the air inlet, so that the gas entering the accommodating cavity flows to the plurality of air ducts.

[0006] Optionally, a plurality of spoiler plates arranged at equal intervals are provided in the accommodating cavity to form a plurality of spoiler channels, one end of the spoiler channel corresponds to the air inlet, and the other end extends along the stacking direction of the battery cells, and the spoiler channel opens toward one side of the battery cells.

[0007] Optionally, a plurality of spoilers are arranged in the accommodating cavity at equal intervals.

[0008] Optionally, the air duct member is arranged on the side of the battery core.

[0009] Optionally, the battery cells are stacked along the length direction of the shell, and the air inlet and the air outlet are arranged on the side of the shell in the width direction.

[0010] Optionally, the spoiler includes an arc-shaped guide section and a straight-line spoiler section, the spoiler section extends along the stacking direction of the battery cells, one end of the guide section is connected to the spoiler section, and the other end extends toward the air inlet.

[0011] Optionally, the air inlet and the air outlet are respectively arranged at opposite sides of the shell in the width direction, and the air inlet and the air outlet are respectively arranged at two ends of the shell in the length direction.

[0012] Optionally, the battery cells are arranged in at least two rows along the width direction of the housing (1), and the air duct extends along the height direction of the battery cells.

[0013] Optionally, the shell includes a tray, an upper cover and an end cover, the battery cell is placed on the tray, the upper cover is arranged above the tray and combined with the tray to form a cylindrical structure, the end cover is arranged at both ends of the cylindrical structure, the spoiler channel is arranged in the tray and below the battery cell, and the air outlet is arranged above the battery cell.

[0014] Optionally, the height of the air inlet is less than or equal to the height of the spoiler channel, and a gap is provided between the spoiler channel and the battery core.

[0015] Optionally, platforms for supporting the battery cells are provided on both sides of the tray, and the battery pack also includes a support member for supporting the battery cells, the support member is arranged in the middle of the tray and extends along the stacking direction of the battery cells, and the height of the platform and the support member is greater than the height of the spoiler channel.

[0016] Optionally, at least one air collecting cavity extending along the stacking direction of the battery cells and connected to the air duct is provided in the upper cover, an air delivery groove extending along the horizontal direction and connected to the air collecting cavity is provided on the end cover, and the air outlet is connected to one of the air collecting cavities.

[0017] Optionally, a portion of the side wall of the tray below the support platform is configured as an inclined surface.

[0018] Optionally, a smoke exhaust duct connected to the outside is provided in the upper cover, and the smoke exhaust duct extends along the stacking direction of the battery cells and is connected to the air duct.

[0019] Optionally, the air duct is configured in a straight line.

[0020] Optionally, the air duct member is constructed as an air duct plate, and a plurality of the air ducts are arranged at intervals, and the widths of the plurality of air ducts gradually decrease from the center of the air duct plate to both sides along the arrangement direction.

[0021] Optionally, the pole of the battery cell is arranged on the side of the battery cell close to the air outlet end of the air duct, and a connecting piece is connected to the poles of two adjacent battery cells. The air outlet end of the air duct is constructed in an open shape so that the width of the air outlet end of the air duct is greater than the width of the air inlet end.

[0022] Optionally, a hollow opening is provided on the air duct member.

[0023] The present disclosure also provides an electrical device, including: the above-mentioned battery pack.

[0024] Through the above technical scheme, several battery cells are stacked in the accommodating cavity of the shell, and at least one side of the battery cell intersecting with the stacking direction is fitted with a duct piece. The duct piece is provided with an air duct for cooling air to pass through, so as to cool the battery cell. The air duct is connected with the air inlet and the air outlet. The cooling air entering the accommodating cavity is evenly distributed through the turbulence channel, so that the cooling air can enter the multiple air ducts more evenly, thereby improving the cooling effect of the battery cell.

[0025] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0027] Figure 1 is a schematic diagram of the structure of the battery pack in the present disclosure;

[0028] Figure 2 is an exploded view of a battery pack in the present disclosure;

[0029] Figure 3 is a cross-sectional view of a battery pack in the present disclosure;

[0030] Figure 4 is a top view of a tray in the present disclosure;

[0031] Figure 5 is a schematic diagram of the structure of the end cover in the present disclosure;

[0032] Figure 6 is a structural schematic diagram of a first embodiment of the air duct member disclosed in the present invention;

[0033] Figure 7 is a structural schematic diagram of a second embodiment of the air duct member in the present disclosure;

[0034] Figure 8 It is a structural schematic diagram of the third embodiment of the air duct component in the present disclosure.

[0035] Description of Reference Numerals

[0036] 1. Shell; 101. Upper cover; 102. End cover; 1021. Air duct; 103. Tray; 1031. Support platform; 2. Air inlet; 3. Battery cell; 31. Pole; 4. Air duct member; 41. Air duct; 42. Hollow opening; 5. Connecting piece; 6. Support member; 7. Spoiler; 71. Spoiler channel; 72. Guide section; 73. Spoiler section; 8. Air outlet; 9. Gap; 10. Air collecting chamber; 11. Smoke exhaust duct; 12. Accommodating chamber. DETAILED DESCRIPTION

[0037] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0038] In the present disclosure, unless otherwise stated, directional words such as "upper, lower, top, and bottom" generally refer to the upper, lower, top, and bottom of the corresponding component in the direction of gravity when in use, and "inner and outer" refer to the inner and outer relative to the contour of the component or structure itself. In addition, in the description with reference to the drawings, the same reference numerals in different drawings represent the same elements.

[0039] like Figure 1-2 As shown, the present disclosure provides a battery pack, including: a shell 1, a accommodating cavity 12 is provided in the shell 1, and the accommodating cavity 12 is connected to the air inlet 2 and the air outlet 8; a battery cell 3, a plurality of battery cells 3 are stacked in the accommodating cavity 12, for example, the battery cells 3 are stacked along the thickness direction thereof; a plurality of air duct members 4 are provided, the air duct members 4 are arranged on at least one side of the battery cell 3 intersecting with the stacking direction, and the air duct member 4 is provided with an air duct 41 connected to the air inlet 2 and the air outlet 8; and a spoiler channel 71, the spoiler channel 71 is arranged in the accommodating cavity 12, the spoiler channel 71 is located at the air inlet end of the air duct 41 and is connected to the air inlet 2, so that the gas entering the accommodating cavity 12 flows to the plurality of air ducts 41.

[0040] Through the above technical scheme, a number of battery cells 3 are stacked in the accommodating cavity 12 of the shell 1, and at least one side of the battery cell 3 intersecting with the stacking direction is fitted with a duct member 4, for example, the intersecting side is a side perpendicular to the stacking direction, that is, the duct member 4 is arranged between the battery cells 3 or on the outside of the battery cell 3 along the stacking direction of the battery cells 3. In order to enhance the cooling effect, duct members 4 are arranged on both sides of the battery cell 3, and the duct member 4 is provided with an air duct 41 for cooling air to pass through. The air duct 41 can be arranged on one side of the air duct member 4, or on the opposite sides of the air duct member 4, so as to cool the battery cell 3. The air duct 41 is connected with the air inlet 2 and the air outlet 8, and the cooling air enters the accommodating cavity 12 from the air inlet 2. The spoiler channel 71 plays a role of equalizing flow. The cooling air entering the accommodating cavity 12 is equalized through the spoiler channel 71, so that the cooling air can enter the multiple air ducts 41 more evenly, and then be discharged from the air outlet 8, so that the cooling effect of the battery cell 3 is better.

[0041] As an optional implementation, Figure 2-4 As shown, a spoiler plate 7 is provided in the accommodating cavity 12 to form a spoiler channel 71. One end of the spoiler channel 71 corresponds to the air inlet 2, and the other end extends along the stacking direction of the battery cells 3. The spoiler channel 71 opens toward one side of the battery cells 3, and extends along the stacking direction of the battery cells 3, so that the cooling wind entering the accommodating cavity 12 flows along the spoiler channel 71 and enters the multiple air ducts 41.

[0042] Optionally, if the disruptor plates 7 are arranged at equal intervals in the accommodating cavity 12 , a plurality of disruptor channels 71 with equal intervals are formed, so that the cooling air entering the accommodating cavity 12 can enter the plurality of air ducts 41 evenly.

[0043] Alternatively, if Figure 2-3 As shown, the battery cells 3 are stacked along the length direction of the shell 1, and the air inlet 2 and the air outlet 8 are arranged on the side of the shell 1 in the width direction. This arrangement is compatible with the layout requirements of most vehicles, because the extension direction of the battery pack of most vehicles is perpendicular to the moving direction of the vehicle, that is, the battery pack extends along the width direction of the vehicle, and the space in the width direction of the vehicle is relatively small. If the air inlet 2 and the air outlet 8 are arranged in the length direction of the shell 1, then the pipes connected to the air inlet 2 and the air outlet 8 will occupy the space in the width direction of the vehicle, making it difficult to arrange other components.

[0044] Alternatively, if Figure 2 and Figure 4 As shown, the spoiler 7 includes an arc-shaped guide section 72 and a straight-line spoiler section 73. The guide sections 72 of the multiple spoiler plates 7 are concentrically arranged, and the spoiler section 73 extends along the stacking direction of the battery cells 3. One end of the guide section 72 is connected to the spoiler section 73, and the other end extends toward the direction of the air inlet 2. Because the air inlet 2 is arranged in the width direction of the shell 1, and the spoiler channel 71 extends along the length direction of the shell 1, it is necessary to set the guide section 72 to guide the wind entering from the air inlet 2 to the stacking direction of the battery cells 3. The spoiler 7 can not only balance the airflow, but also guide the turbulent flow that has just entered the accommodating cavity 12 into a smooth airflow. The spoiler 7 can extend to the end of the shell 1 along the stacking direction of the battery cells 3, or it can only extend to a part of the shell 1. It is only necessary to achieve the effect of equalizing the flow, which can also save materials and reduce the overall weight of the battery pack.

[0045] Alternatively, if Figure 2-3As shown, the air inlet 2 and the air outlet 8 are respectively arranged on opposite sides of the shell 1 in the width direction, and the air inlet 2 and the air outlet 8 are respectively arranged at both ends of the shell 1 in the length direction. The cooling air enters the accommodating cavity 12 from the air inlet 2 to cool all the battery cells 3 and can be directly discharged from the air outlet 8. In this way, the path of the cooling air is shorter, the path length of the cooling air is reduced, and the wind resistance can be reduced at the same time, thereby reducing the energy consumption of the fan.

[0046] As an optional implementation, Figure 2 As shown, in order to enhance the cooling effect of the air duct member 4, the air duct member 4 is arranged on the side of the battery core 3. The air duct member 4 can be bonded to the battery core 3 by a thermally conductive adhesive, or can be simply contact-bonded.

[0047] As an optional implementation, Figure 2-3 As shown, the battery cells 3 are arranged in at least two rows along the width direction of the shell 1, that is, the battery cells 3 are of single-layer design, and the air duct 41 extends along the height direction of the battery cells 3. The battery cells 3 are vertically placed in the shell 1, and the height direction is the height direction reflected when the battery cells 3 are placed in the shell 1. The cooling wind can be discharged after cooling only one battery cell 3. If the cooling wind cools multiple battery cells 3 along the way, the temperature of the cooling wind will gradually increase, resulting in a decrease in the cooling effect of the battery cells 3 located at the rear. The battery cells 3 in the present disclosure are rectangular battery cells 3, and the height direction is the short side of the rectangle to reduce the overall height of the battery pack. The extension of the air duct 41 along the height direction of the battery cells 3 can make the air duct 41 shorter, the temperature difference of the cooling wind is smaller, and the cooling effect is better.

[0048] Alternatively, if Figure 2 As shown, the shell 1 includes a tray 103, an upper cover 101 and an end cover 102, the battery cell 3 is placed on the tray 103, the upper cover 101 is arranged above the tray 103 and covers the tray 103 to form a cylindrical structure, the end cover 102 is arranged at both ends of the cylindrical structure, the tray 103, the upper cover 101 and the end cover 102 together form a accommodating cavity 12 for installing the battery cell 3, the spoiler channel 71 is arranged in the tray 103 and below the battery cell 3, the air outlet 8 is arranged above the battery cell 3, the cooling air enters the accommodating cavity 12 and flows upward into the air duct 41 after passing through the spoiler channel 71, flows along the air duct 41 to cool the battery cell 3 and is discharged from the air outlet 8 above the battery cell 3 without turning back, thereby reducing the path length of the cooling air, and after the battery cell 3 heats up, the surrounding hot air flows upward, the cooling air and the hot air flow in the same direction, thereby reducing wind resistance and quickly taking out heat.

[0049] Alternatively, if Figure 3As shown, the height of the air inlet 2 is less than or equal to the height of the spoiler channel 71, so that all the cooling air can enter the spoiler channel 71. A gap 9 is provided between the spoiler channel 71 and the battery cell 3. The cooling air first enters the spoiler channel 71 for the first flow equalization, and then enters the gap 9 for the second flow equalization, so that the wind entering the air duct 41 is more uniform.

[0050] Alternatively, if Figure 2-3 As shown, both sides of the tray 103 are provided with a support 1031 for supporting the battery cells 3, and the battery pack also includes a support member 6 for supporting the battery cells 3. The support member 6 is arranged in the middle of the tray 103 and extends along the stacking direction of the battery cells 3. The height of the support 1031 and the support member 6 is greater than the height of the spoiler channel 71. The support member 6 includes a beam extending along the stacking direction of the battery cells 3 and support rods arranged at both ends of the beam. The support rods are connected to the ends of the tray 103 so that the beam is located above the spoiler channel 71. The two ends of the battery cells 3 are overlapped on the support 1031, and the middle part is supported by the support member 6 so that there is a gap 9 between the battery cells 3 and the spoiler channel 71, and the battery cells 3 are limited and fixed at the same time.

[0051] Alternatively, if Figure 3 and Figure 5 As shown, at least one air collecting cavity 10 extending along the stacking direction of the battery cells 3 and communicating with the air duct 41 is provided in the upper cover 101, and an air delivery slot 1021 extending along the horizontal direction and communicating with the air collecting cavity 10 is provided on the end cover 102, and the air outlet 8 is communicated with one of the air collecting cavities 10, and the air collecting cavity 10 is arranged at the air outlet end of the air duct 41. Because there are multiple air ducts 41 and only one air outlet 8 is provided, it is necessary to set the air collecting cavity 10 to collect the cooling air flowing out of the multiple air ducts 41 and then discharge it from the air outlet 8. There are multiple air collecting cavities 10, then Then it is necessary to convey the gas in the multiple air collecting chambers 10 to the air collecting chamber 10 connected to the air outlet 8 through the air delivery groove 1021 on the end cover 102, and discharge it from the air outlet 8 uniformly. Each air duct member 4 is provided with multiple air ducts 41, and the cooling air flowing out of the multiple air ducts 41 enters the multiple air collecting chambers 10. The reason for setting multiple air collecting chambers 10 is that the upper cover 101 also has the function of fixing the battery cell 3. The battery cell 3 is set to a tortuous shape, and the air collecting chamber 10 can also contact the battery cell 3 to fix the battery cell 3. In other embodiments, only one air collecting chamber 10 can be set, and the cooling air in the air collecting chamber 10 is directly discharged from the air outlet 8, but it is necessary to set a plurality of pressure rods perpendicular to the extension direction of the air collecting chamber 10 in the air collecting chamber 10 to contact the battery cell 3 to fix the battery cell 3.

[0052] Alternatively, if Figure 3As shown, the side wall of the tray 103 located below the support platform 1031 is constructed as an inclined surface, which is inclined outward. Compared with the right-angled side, the inclined surface has the following advantages: first, the inclined surface is more conducive to the guidance and equalization of airflow, thereby reducing wind resistance; second, the inclined surface is easy to deform and can absorb the vibration impact of the entire package; third, the inclined surface is shorter than the length of the two right-angled sides, thereby saving materials.

[0053] Alternatively, if Figure 1-3 As shown, a smoke exhaust duct 11 connected to the outside is provided in the upper cover 101, the smoke exhaust duct 11 extends along the stacking direction of the battery cells 3 and is connected to the air duct 41, the smoke exhaust duct 11 is arranged between a plurality of air collecting cavities 10, and the smoke exhaust duct 11 is connected to each air duct member 4, when the battery overheats and burns, the smoke exhaust duct 11 can discharge pressure and dissipate heat, and at the same time, the cooling air can be directly discharged from the smoke exhaust duct 11 after flowing out through the air duct 41.

[0054] As an optional implementation, Figure 3 and Figure 6-8 As shown, the air duct 41 can be set to any suitable shape. Exemplarily, in the present disclosure, the air duct 41 is configured to be straight. The straight air duct 41 can reduce the path length and wind resistance of the cooling air.

[0055] As an optional implementation, Figure 6-8 As shown, the air duct member 4 is constructed as an air duct plate, and a plurality of air ducts 41 are arranged at intervals. The width of the plurality of air ducts 41 gradually decreases from the center of the air duct plate to both sides along the arrangement direction. Because the heat generation of each area of ​​the battery cell 3 is different, the heat generation in the middle part is higher, and the heat generation on both sides is lower, the air duct 41 located in the middle of the battery cell 3 is wider, and the width gradually decreases toward both sides.

[0056] As an optional implementation, Figure 2 and Figure 7 As shown, the pole 31 of the battery cell 3 is arranged on the side of the air outlet end of the battery cell 3 close to the air duct 41, and a connecting piece 5 is connected to the poles 31 of two adjacent battery cells 3. The air outlet end of the air duct 41 is constructed to be open so that the width of the air outlet end of the air duct 41 is greater than the width of the air inlet end. The connecting piece 5 plays the role of connecting the battery cells 3 in series and in parallel. During the charging and discharging process of the battery cell 3, the heat at the pole 31 and the connecting piece 5 is relatively high. The accumulated heat is easy to increase the impedance, affecting the performance of the battery cell 3, and at the same time, it will also reduce the connection reliability of the connecting piece 5. Therefore, the air outlet end of the air duct 41 close to the pole 31 is set to be open to increase the cooling area, thereby enhancing the cooling effect.

[0057] As an optional implementation, Figure 8 As shown, a hollow opening 42 is provided on the air duct member 4 . The hollow opening 42 allows the cooling air to directly contact two adjacent battery cells 3 at the same time, thereby achieving a better cooling effect for the two adjacent battery cells 3 .

[0058] The present disclosure also provides an electrical device, including: the above-mentioned battery pack. For example, the electrical device can be a vehicle or an energy storage system. The use of the battery pack can allow cooling air to enter the multiple air ducts 41 more evenly, thereby achieving a better cooling effect on the battery cells 3.

[0059] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0061] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery pack, characterized in that: include: A housing, wherein a receiving cavity is provided in the housing, and an air inlet and an air outlet are connected to the receiving cavity; A battery cell, a plurality of which are stacked in the accommodating cavity; A plurality of air duct members are provided, wherein the air duct members are arranged on at least one side of the battery core intersecting with the stacking direction, and the air duct members are provided with an air duct connected with the air inlet and the air outlet; as well as A spoiler channel, the spoiler channel is arranged in the accommodating cavity, the spoiler channel is located at the air inlet end of the air duct and is connected with the air inlet, so that the gas entering the accommodating cavity flows to the multiple air ducts; The accommodating cavity is provided with a plurality of spoiler plates to form a plurality of spoiler channels, one end of the spoiler channel corresponds to the air inlet, and the other end extends along the stacking direction of the battery cells, and the spoiler channel opens toward one side of the battery cells; the shell comprises a tray, an upper cover and an end cover, the spoiler channel is arranged in the tray and below the battery cells, and the air outlet is arranged above the battery cells; The battery cells are stacked along the length direction of the shell, the duct member is arranged between the battery cells or on the outside of the battery cells along the stacking direction of the battery cells, and the air inlet and the air outlet are arranged on the side of the shell in the width direction; the spoiler plate includes an arc-shaped guide section and a straight-line spoiler section, the spoiler section extends along the stacking direction of the battery cells, one end of the guide section is connected to the spoiler section, and the other end extends toward the air inlet; the air inlet and the air outlet are respectively arranged on opposite sides of the width direction of the shell, and the air inlet and the air outlet are respectively arranged at two ends of the length direction of the shell; the height of the air inlet is less than or equal to the height of the spoiler channel, and a gap is provided between the spoiler channel and the battery cell; the duct member is constructed as an air duct plate, and a plurality of air ducts are arranged at intervals, and the width of the plurality of air ducts gradually decreases from the center of the air duct plate to both sides along the arrangement direction.

2. The battery pack according to claim 1, characterized in that: A plurality of spoilers are arranged in the accommodating cavity at equal intervals.

3. The battery pack according to claim 1, characterized in that: The air duct member is arranged on the side of the battery core.

4. The battery pack according to claim 1, characterized in that: The battery cells are arranged in at least two rows along the width direction of the shell, and the air duct extends along the height direction of the battery cells.

5. The battery pack according to claim 4, characterized in that: The battery core is placed on the tray, the upper cover is arranged above the tray and is combined with the tray to form a cylindrical structure, and the end covers are arranged at both ends of the cylindrical structure.

6. The battery pack according to claim 4, characterized in that: Support platforms for supporting the battery cells are provided on both sides of the tray. The battery pack also includes a support member for supporting the battery cells. The support member is arranged in the middle of the tray and extends along the stacking direction of the battery cells. The height of the support platform and the support member is greater than the height of the spoiler channel.

7. The battery pack according to claim 1, characterized in that: At least one air collecting cavity extending along the stacking direction of the battery cells and connected to the air duct is provided in the upper cover, an air delivery groove extending along the horizontal direction and connected to the air collecting cavity is provided on the end cover, and the air outlet is connected to one of the air collecting cavities.

8. The battery pack according to claim 6, characterized in that: The portion of the side wall of the tray located below the support platform is configured as an inclined surface.

9. The battery pack according to claim 1, characterized in that: A smoke exhaust duct connected to the outside is arranged in the upper cover, and the smoke exhaust duct extends along the stacking direction of the battery cells and is connected to the air duct.

10. The battery pack according to claim 1, characterized in that: The air duct is configured in a straight line.

11. The battery pack according to claim 1 or 10, characterized in that: The poles of the battery cell are arranged on one side of the battery cell close to the air outlet end of the air duct, and connecting plates are connected to the poles of two adjacent battery cells. The air outlet end of the air duct is constructed in an open shape so that the width of the air outlet end of the air duct is greater than the width of the air inlet end.

12. The battery pack according to claim 1, characterized in that: The air duct member is provided with a hollow opening.

13. An electrical equipment, characterized in that: include: A battery pack according to any one of claims 1 to 12.

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