Battery Pack

Abstract

The utility model relates to a battery pack, comprising a shell and a battery pack accommodated in the shell, the shell defining an airflow channel flowing through the battery pack; the battery pack comprises a first battery pack, a second battery pack located behind the first battery pack, and a guide structure arranged in the airflow channel, the guide structure divides the airflow channel into a first airflow channel for cooling the first battery pack and a second airflow channel for cooling the second battery pack, the first airflow channel being independent of the second airflow channel. The utility model arranges the guide structure on the bracket, so that the cooling airflow can dissipate heat to the first battery pack and the second battery pack respectively, and the heat dissipation effect is good.

Description

[Technical field]

[0001] The utility model relates to a battery pack, in particular to a battery pack used for electric tools or garden tools. [Background technology]

[0002] Among the many existing cordless power tools and other cordless devices, battery packs are usually selected as power sources for ease of mobility and portability. Nowadays, battery packs have been widely used in power tools such as electric drills, electric hammers, electric picks, angle grinders, hair dryers, lawn mowers, electric shears, and other electrical equipment such as lighting, audio equipment, and outdoor power supplies.

[0003] However, with the continuous development of battery pack technology, its discharge current and charging current are gradually increasing. During use, the heat of the battery cells continues to accumulate. Especially when electrical equipment continues to work at a large current for a period of time, the internal temperature of the battery pack will rise sharply, which will cause problems with the safety and reliability of the battery pack.

[0004] In view of this, it is indeed necessary to provide an improved battery pack to overcome the defects of the prior art. [Utility Model Content]

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a battery pack with good heat dissipation effect.

[0006] The utility model can solve the problems of the prior art by adopting the following technical solutions: a battery pack comprises a shell, a battery pack accommodated in the shell and a bracket for mounting the battery pack, the shell having a first ventilation hole penetrating the top wall, a second ventilation hole penetrating the bottom wall and an air collecting port protruding downward from the top wall, the air collecting port being arranged around the first ventilation hole, the first ventilation hole, the second ventilation hole and the air collecting port forming an air flow channel for cooling the battery pack; the air collecting port and the first ventilation hole are arranged around a first chamber, a guide structure is arranged on the bracket, and in the upper and lower directions of the battery pack, at least a part of the guide structure is located in the first chamber to divide the air flow channel into a first air flow channel and a second air flow channel.

[0007] A further improved solution is: the battery pack comprises a first battery pack and a second battery pack located behind the first battery pack, the first air flow channel cools the first battery pack, and the second air flow channel cools the second battery pack.

[0008] A further improved solution is: the bracket has a first bracket component for fixing the first battery pack and a second bracket component for fixing the second battery pack, and the guide structure spans the first bracket component and the second bracket component.

[0009] The utility model can also adopt the following technical solutions to solve the problems of the prior art: a battery pack, including a shell, a battery pack accommodated in the shell and a bracket for mounting the battery pack, the shell having a first ventilation hole penetrating the top wall, a second ventilation hole penetrating the bottom wall and an air collecting port protruding downward from the top wall, the air collecting port covering the first ventilation hole, the first ventilation hole, the second ventilation hole and the air collecting port forming an air flow channel for cooling the battery pack; a guide structure is arranged on the bracket, and in a first plane, the ratio of the overlapping area of ​​the air collecting port and the guide structure to the projected area of ​​the air collecting port is not less than 0.5.

[0010] The utility model can also adopt the following technical solutions to solve the problems of the prior art: a battery pack includes a shell and a battery group accommodated in the shell, the shell defines an air flow channel flowing through the battery group; the battery group has a first battery group, a second battery group located behind the first battery group and a guide structure arranged in the air flow channel, the guide structure divides the air flow channel into a first air flow channel for cooling the first battery group and a second air flow channel for cooling the second battery group, the first air flow channel is independent of the second air flow channel.

[0011] A further improvement is as follows: the shell has a bracket for mounting the battery pack, the guide structure is connected to the bracket, the bracket has a first bracket assembly for fixing the first battery pack and a second bracket assembly for fixing the second battery pack, and the guide structure spans the first bracket assembly and the second bracket assembly.

[0012] A further improved solution is: the bracket has a first rib position, a second rib position and a third rib position protruding upward from the second bracket component and a fourth rib position and a fifth rib position protruding upward from the first bracket component, the extension direction of the first rib position coincides with the extension direction of the fourth rib position, the extension direction of the third rib position coincides with the extension direction of the fifth rib position, the extension direction of the first rib position is parallel to the extension direction of the third rib position, and the extension direction of the first rib position is perpendicular to the extension direction of the second rib position, the first rib position, the second rib position, the third rib position, the fourth rib position and the fifth rib position are arranged to form the guide structure, and the guide structure is U-shaped.

[0013] A further improved solution is: the shell has a first ventilation hole penetrating the top wall, a second ventilation hole penetrating the bottom wall, and an air collecting port protruding downward from the top wall, and the air collecting port is arranged around the first ventilation hole.

[0014] A further improvement is as follows: the air collecting port and the first ventilation hole are arranged to form a first chamber, and in the up and down directions of the battery pack, part of the flow guide structure is located in the first chamber.

[0015] A further improvement is that, in the first plane, the ratio of the overlapping area of ​​the air collecting port and the air guide structure to the projected area of ​​the air collecting port is not less than 0.5.

[0016] Compared with the prior art, the utility model has the following beneficial effects: by arranging a guide structure on the bracket, the cooling airflow can dissipate heat for the first battery group and the second battery group respectively; at the same time, the ratio of the overlapping area of ​​the air collecting port and the guide structure to the projected area of ​​the air collecting port is greater than 0.5, which facilitates guiding the cooling airflow to the first battery group away from the first ventilation hole.

Brief Description of the Drawings

[0017] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the battery pack of the utility model;

[0019] Figure 2 yes Figure 1 A schematic structural diagram of the battery pack from another perspective;

[0020] Figure 3 yes Figure 1 A cross-sectional view of the battery pack shown;

[0021] Figure 4 yes Figure 3 The disassembled diagram of the battery pack shown;

[0022] Figure 5 yes Figure 1 A schematic structural diagram of a first shell in the battery pack shown;

[0023] Figure 6 yes Figure 1 The schematic structural diagram of the battery pack shown here is a diagram of a battery pack without the first shell;

[0024] Figure 7 yes Figure 1 A schematic diagram of the structure of the operating components in the battery pack shown;

[0025] Figure 8a yes Figure 7 A schematic diagram of the structure of the buttons in the operating element shown;

[0026] Figure 8b yes Figure 8a A schematic diagram of the structure of the button at another angle;

[0027] Figure 9a yes Figure 7 A schematic diagram of the structure of the latch in the operating member shown;

[0028] Figure 9b yes Figure 9a A schematic structural diagram of the latch from another angle;

[0029] Fig.10 yes Figure 5 A cross-sectional view of the first housing shown;

[0030] Fig.11 yes Figure 1 A bottom view of the battery pack shown;

[0031] Fig.12 yes Figure 3 A cross-sectional view of the battery pack shown plugged into a charger;

[0032] Fig.13 yes Figure 6 A partial enlarged view of the bracket shown. [Specific implementation method]

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0034] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words indicating orientation or positional relationship, such as "upper", "lower", "front", "back", "left", "right", etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0035] See also Figure 1 and Fig.12 As shown, the embodiment of the utility model relates to a rechargeable battery pack 100, generally referred to as a "secondary battery", which can be installed in various electrical devices 200. The electrical device 200 can be an electric working machine such as an electric drill, a lawn mower, a hair dryer, etc. that uses a motor as a power source, or it can be an electrical device such as a lamp, a radio, a speaker, etc. that does not have a motor. Alternatively, the electrical device 200 can also be a charging device that supplies power to the battery pack.

[0036] The electrical device 200 includes a battery pack mounting portion 201, and the battery pack 100 can be mounted on the battery pack mounting portion 201 by sliding in a predetermined sliding direction relative to the battery pack mounting portion 201. In the present embodiment, when the battery pack 100 is mounted on the battery pack mounting portion 201, the direction in which the battery pack 100 is slid is referred to as a rear direction; and when the battery pack 100 is removed from the battery pack mounting portion 201, the direction in which the battery pack 100 is slid is referred to as a front direction. In addition, when the battery pack 100 is mounted on the battery pack mounting portion 201 and observed from the front of the battery pack, the direction in which the battery pack mounting portion 201 is located is referred to as an upper direction, and the direction opposite to the upper direction is referred to as a lower direction. Furthermore, the direction orthogonal to the front-to-back direction and the up-down direction is referred to as a left-right direction. The front-to-back direction and the left-right direction constitute a first plane, and the front-to-back direction and the up-down direction constitute a second plane.

[0037] Combination Figures 1 to 4 As shown, the battery pack 100 includes: a housing 1, a bracket 3 installed in the housing 1, a control panel 4 and a battery pack 5, and an operating member 2 movably installed on the housing 1. A plug-in port 114 is formed at the upper end of the housing 1. The battery pack 100 can be detachably installed to the battery pack installation part 201 of the electric tool or charging device 200 via the operating member 2 along the extension direction of the plug-in port 114. Among them, a plug-in part and an operating part are formed on the outer side of the top wall of the housing 1. Pressing the operating part can switch the connection state of the operating part. Furthermore, the operating part is closer to the front end of the housing 1 than the plug-in part.

[0038] The above-mentioned shell 1 can be made of plastic or other composite materials, and has a first shell 11 and a second shell 12 and a accommodating space 15 formed between the first shell 11 and the second shell 12. The first shell 11 and the second shell 12 are configured as upper and lower covers. Specifically, the first shell 11 is an upper shell, and the second shell 12 is a lower shell. A matching structure can be set between the upper shell and the lower shell for positioning, and the two are tightly connected by screws.

[0039] In this embodiment, the first shell 11 has a molded cover body 111, a first opening 112 and a second opening 113 passing through the cover body 111 from top to bottom, a plug-in port 114 formed on the upper surface of the cover body 111 and fitted with the battery pack mounting portion 201, a first limiting portion 115 and a second limiting portion 117 protruding downward from the inner surface of the top wall of the cover body 111, a supporting portion 116 arranged on the front side wall of the cover body 111, and a first limiting groove 118 and a second limiting groove 119 formed on the inner surface of the top wall of the cover body 111. The first opening 112 and the second opening 113 are used to accommodate the operating member 2, and the first limiting portion 115, the second limiting portion 117, the supporting portion 116, the first limiting groove 118 and the second limiting groove 119 and other structures play a limiting role on the operating member 2. The structure is simple and easy to install.

[0040] In this embodiment, the second housing 12 is a rectangular parallelepiped with an upper opening, and is mainly used to receive the battery pack 5 .

[0041] In addition, the housing 1 also has a top wall 1a and a bottom wall 1b, which are located at the upper and lower sides of the housing 1, respectively. The plane where the top wall 1a is located is the connection surface, and the plane where the bottom wall 1b is located is the contact surface. The connection surface and the contact surface are parallel to each other, and the distance between them is the height of the battery pack 100.

[0042] Among them, the battery pack 100 also includes an auxiliary operating part 8 that is recessed from the contact surface toward the direction where the connection surface is located. In this embodiment, a plurality of auxiliary operating parts 8 are arranged on the contact surface. Preferably, the number of the auxiliary operating parts 8 is three, which correspond to the fingers of the operator respectively. The optional operation method is that the operator's index finger, middle finger and ring finger are placed on the auxiliary operating part 8, and the thumb is pressed on the operating part 2 at the same time, and the battery pack 100 can be disassembled and assembled with one hand. In addition, the ratio of the distance from any auxiliary operating part 8 to the front end surface of the shell 1 to the length of the shell 1 in the front-to-back direction is less than 0.8. The position of the auxiliary operating part 8 is configured according to the height of the battery pack 100, so that its arrangement conforms to ergonomics.

[0043] Combination Fig.11 As shown, the auxiliary operating part 8 has a first auxiliary operating part 8a, a second auxiliary operating part 8b and a third auxiliary operating part 8c. The first auxiliary operating part 8a, the second auxiliary operating part 8b and the third auxiliary operating part 8c are arranged on the contact surface at intervals along the left-right direction, and the three are staggered in the front-to-back direction. Specifically, the first auxiliary operating part 8a is away from the front end of the shell 1 relative to the second auxiliary operating part 8b and the third auxiliary operating part 8c, and the first auxiliary operating part 8a is located between the second auxiliary operating part 8b and the third auxiliary operating part 8c.

[0044] In this embodiment, any auxiliary operating portion 8 has a recessed feature 81 formed on the bottom wall 1b of the shell 1 and a convex rib 82 protruding from the recessed feature 81 away from the connecting surface. The recessed feature 81 and the convex rib 82 make it convenient for the operator to apply force to the bottom wall 1b of the battery pack 100.

[0045] Specifically, the ratio of any cross-sectional area of ​​the concave feature 81 parallel to the contact surface to the projection area of ​​the concave feature 81 on the contact surface is not greater than 1. In the bottom-up direction, the cross-sectional area of ​​the concave feature 81 gradually decreases. Further, the cross-section of the concave feature 81 is elliptical. Preferably, the structure of the concave feature 81 is adapted to the shape of the finger.

[0046] Specifically, the plurality of convex ribs 82 are all located within the projection of the auxiliary operating portion 8 on the contact surface. At the same time, the convex ribs are located on the upper side of the contact surface and do not extend downward beyond the contact surface. This design has an anti-slip effect on the one hand, and can be placed flat on the other hand.

[0047] Please refer to Figures 1 to 4 As shown, the shell 1 also has a first ventilation hole 13 penetrating the top wall, a second ventilation hole 14 penetrating the bottom wall, and an air collecting port 16 protruding downward from the inner surface of the top wall. A control board opening 41 is correspondingly arranged on the control board 4. The first ventilation hole 13, the second ventilation hole 14, the air collecting port 16 and the control board opening 41 form an air flow channel for cooling the battery pack 5 in the accommodating space 15.

[0048] When the battery pack 100 is installed in the electrical device 200, the electrical device 200 may be an electric tool or a charging device, such as Fig.12 It is shown that the battery pack 100 is installed on the charging device 200 , and the fan 202 in the charging device 200 can not only dissipate heat for the electronic components in the charging device 200 , but also cool the battery pack 100 .

[0049] Specifically, when the fan 202 rotates and forms a negative pressure on the side close to the battery pack 100, the cooling airflow enters from the second ventilation hole 14, cools the battery pack 5, passes through the third ventilation hole from the first ventilation hole 13, enters the charging device 200, and finally is discharged from the fourth ventilation hole of the charging device 200. Alternatively, when the fan 202 rotates, the cooling airflow passes through the fourth ventilation hole, enters the charging device 200, passes through the third ventilation hole, enters the battery pack 100 from the first ventilation hole 13, cools the battery pack 5, and is discharged from the second ventilation hole 14.

[0050] In this embodiment, the first ventilation hole 13 is located at the rear of the housing 1 and is disposed corresponding to the third ventilation hole of the charging device 200 .

[0051] In this embodiment, the second ventilation holes 14 may be four in number, and the four second ventilation holes 14a / 14b / 14c / 14d are respectively disposed at four positions of the front, back, left, and right of the bottom wall 1b.

[0052] Combination Figure 5 and Figure 6 As shown, the battery pack 5 can be composed of 30 battery cells 51 connected in series and parallel. Specifically, the 30 battery cells 51 are electrically connected in a three-in-parallel and ten-in-series manner. At this time, the rated voltage of the battery pack 100 is 40V, the rated capacity is 6.0Ah, and the weight is 1.0kg-2.0kg. More specifically, the weight of the battery pack 100 is 1.7kg-1.8kg.

[0053] In this embodiment, the battery pack 5 includes a first battery pack 5a and a second battery pack 5b, each of which is composed of 15 battery cells 51 connected in series and in parallel. The first battery pack 5a and the second battery pack 5b are connected in series, and the first battery pack 5a and the second battery pack 5b are arranged in the front-to-back direction to reduce the height of the battery pack 100 and make it easier to grasp. Specifically, the first battery pack 5a and the second battery pack 5b are arranged in three rows and five columns, and the rows are staggered.

[0054] In addition, the battery pack 5 is accommodated in the bracket 3, and each battery cell 51 is fixedly placed by the bracket 3 to prevent it from moving in the housing 1. The control board 4 is attached to the bracket 3, and can be arranged above the bracket 3 and fixedly connected to the bracket 3.

[0055] In this embodiment, the bracket 3 includes a first bracket assembly 31 for mounting the first battery pack 5a, a second bracket assembly 32 for fixing the second battery pack 5b, and a guide structure 33 formed above the bracket 3. The first bracket assembly 31 and the second bracket assembly 32 are connected by buckles and / or screws.

[0056] Specifically, the first bracket assembly 31 is composed of a first bracket 31a and a second bracket 31b, and the second bracket assembly 32 is composed of a third bracket 32a and a fourth bracket 32b. The first bracket 31a, the second bracket 31b, the control board 4 and the second housing 12 form a left chamber, and the third bracket 32a, the fourth bracket 32b, the control board 4 and the second housing 12 form a right chamber. Since the upper ends of the second bracket assembly 32 and the third bracket 32a are basically attached to the control board 4, the left chamber and the right chamber are not connected to each other.

[0057] Combination Fig.13 As shown, the bracket 31 further comprises a first rib 33a, a second rib 33b and a third rib 33c protruding upward from the third bracket 32a, and a fourth rib 33d and a fifth rib 33e protruding upward from the second bracket 31b, the extension direction of the first rib 33a coincides with the extension direction of the fourth rib 33d, the extension direction of the second rib 33b coincides with the extension direction of the fifth rib 33e, the extension direction of the first rib 33a is parallel to the extension direction of the third rib 33c, and the extension direction of the first rib 33a is perpendicular to the extension direction of the second rib 33b, and in this embodiment, the first rib 33a, the second rib 33b, the third rib 33c, the fourth rib 33d and the fifth rib 33e are surrounded to form a guide structure 33. Specifically, the guide structure 33 is a U-shaped groove.

[0058] In this embodiment, the first ventilation hole 13 is located on the rear side of the second bracket 31b, and the guide structure 33 spans the first bracket assembly 31 and the second bracket assembly 32, so that the guide structure 33 divides the air flow channel for cooling the battery group 5 into a first air flow channel for cooling the first battery group 5a and a second air flow channel for cooling the second battery group 5b, and the first air flow channel is independent of the second air flow channel.

[0059] Specifically, the guide structure 33 connects the left chamber and the air collecting port 16, so that the second vent 14, the left chamber, the guide structure 33, the air collecting port 16 and the first vent 13 form a first airflow channel, and the second vent 14, the right chamber, the guide structure 33, the air collecting port 16 and the first vent 13 form a second airflow channel. In this embodiment, when the cooling airflow enters the accommodating space 15 from the second vent 14, it is divided into two streams, which flow upward from the gaps between the cells 51 of the first battery group 5a and the second battery group 5b, respectively, and are collected through the air collecting port 16, and then discharged from the first vent 13; in another feasible embodiment, the cooling airflow flows from the first vent 13, passes through the air collecting port 16 and the guide structure 33, and is divided into two streams, which flow downward from the gaps between the cells 51 of the first battery group 5a and the second battery group 5b, respectively, and then discharged from the second vent 14.

[0060] In addition, the air collecting port 16 and the first ventilation hole 13 are arranged to form a first chamber, and part of the guide structure 33 is located in the first chamber in the up and down direction, which is conducive to the division of the cooling airflow. Preferably, in the first plane, the ratio of the overlapping area of ​​the air collecting port 16 and the guide structure 33 to the projected area of ​​the air collecting port 16 is not less than 0.5. Preferably, the ratio of the overlapping area of ​​the air collecting port 16 and the guide structure 33 to the projected area of ​​the air collecting port 16 is greater than 0.6, so that the cooling airflow is better guided to the location of the first battery pack 5a.

[0061] See also Figure 1 and Figure 3 As shown, the operating member 2 is installed in the above-mentioned accommodating space 15 and protrudes to the outside of the housing 1, so that the operator can press and unlock it.

[0062] Combination Figures 6 to 10 As shown, the operating member 2 has a button 21 installed on the first opening 112, a latch 22 installed on the second opening 113, and an elastic element 23 connected between the latch 22 and the first bracket assembly 31. The latch 22 is connected to the button 21, and operating the button 21 will drive the latch 22 to move downward synchronously.

[0063] Specifically, along the front-to-back direction, the button 21 is located between the first limiting portion 115 and the supporting portion 116, wherein the button 21 can rotate on the supporting portion 116. Along the up-down direction, the latch 22 is located between the first housing 11 and the second limiting portion 117, and the latch 22 can abut against the second limiting portion 117 in the up-down direction, which facilitates the assembly and limiting of the button 21 and the latch 22. Further, the projection of the button 21 and the first limiting portion 115 on the first plane at least partially overlaps, preventing the button 21 from moving forward and backward; the projection of the latch 22 and the second limiting portion 117 on the first plane at least partially overlaps, preventing the latch 22 from falling off downward.

[0064] In this embodiment, the button 21 has a rod portion 211 installed on the cover body 111, an operating portion 212 exposed to the first shell 11, and an insert piece 213 extending backward from the operating portion 212. The rod portion 211 is located at the front lower side of the operating portion 212, the operating portion 212 is used to provide a pressing surface for the operating portion, and the insert piece 213 is inserted into the latch 22, so that the button 21 and the latch 22 are linked.

[0065] The above-mentioned rod portion 211 is rotatably installed on the supporting portion 116, and in the front-to-back direction and the up-down direction, the rotation axis of the rod portion 211 is located between the first limiting portion 115 and the supporting portion 116, and the supporting portion 116 is located in the front and lower side of the first limiting portion 115. The first limiting portion 115 and the supporting portion 116 jointly limit the rod portion 211 in the front-to-back direction and the up-down direction.

[0066] Specifically, the two support portions 116 are spaced apart on the inner surface of the front end of the cover body 111, the length of the rod portion 211 is greater than the distance between the two support portions 116, and in the left and right directions, the length of the rod portion 211 is greater than the length of the first opening 112, so that the button 21 can be rotatably installed in the first opening 112 and the button 21 can be effectively prevented from falling off.

[0067] In this embodiment, the latch 22 has a base 221, a locking portion 222 protruding upward from the base 221, a spring receiving groove 223 arranged on the lower side of the base 221, a leg 224 protruding backward from the base 221, an arm 225 arranged on the left and right sides of the base 221, and a receiving groove 226 recessed inward from the front side of the base 221. The insert 213 is received in the receiving groove 226 to connect the latch 22 to the button 21.

[0068] Specifically, the second limiting portion 117 has a guide portion 117a extending in the up-down direction and a hook portion 117b connected to the end of the guide portion 117a, and the hook portion 117b at least partially overlaps with the projection of the latch 22 on the first plane. Further, the hook portion 117b is arranged corresponding to the arm portion 225, and the hook portion 117b is located at the lower side of the arm portion 225.

[0069] In addition, the leg portion 224 of the latch 22 is received in the first limiting groove 118 of the first shell 11, and the arm portion 225 of the latch 22 is received in the second limiting groove 119 of the first shell 11, so as to limit the latch 22 in the front-back and left-right directions.

[0070] Please refer to Figure 2 and Figure 4 As shown, the control board 4 is used to control the charging and discharging of the battery pack 5. In this embodiment, the terminal member 6 is installed on the control board 4 and electrically connected thereto. The terminal member 6 is used to output / input power. In addition, the power display component 7 is connected to the control board 4 through a wire, and the power display component 7 realizes the remaining power display of the battery pack 100 through an additional light board 71 and a power display member 72 and a power button 73 formed on the second housing 12.

[0071] The utility model arranges a guide structure 33 on the bracket 3 so that the cooling airflow can dissipate heat for the first battery group 5a and the second battery group 5b respectively; at the same time, the ratio of the overlapping area of ​​the air collecting port 16 and the guide structure 33 to the projected area of ​​the air collecting port 16 is greater than 0.5, which facilitates guiding the cooling airflow to the first battery group 5a away from the first ventilation hole 13.

[0072] The present invention is not limited to the above specific embodiments. A person skilled in the art can easily understand that there are many other alternatives to the battery pack of the present invention without departing from the principle and scope of the present invention. The scope of protection of the present invention shall be subject to the content of the claims.

Claims

1. A battery pack, comprising a shell, a battery pack accommodated in the shell, and a bracket for mounting the battery pack, the shell having a first ventilation hole penetrating a top wall, a second ventilation hole penetrating a bottom wall, and an air collecting port protruding downward from the top wall, the air collecting port being arranged around the first ventilation hole, the first ventilation hole, the second ventilation hole, and the air collecting port forming an air flow channel for cooling the battery pack; characterized in that: The air collecting port and the first ventilation hole are arranged to form a first chamber, and a guide structure is arranged on the bracket. In the upper and lower directions of the battery pack, at least a part of the guide structure is located in the first chamber to divide the airflow channel into a first airflow channel and a second airflow channel.

2. The battery pack according to claim 1, characterized in that: The battery pack includes a first battery pack and a second battery pack located behind the first battery pack. The first air flow channel cools the first battery pack, and the second air flow channel cools the second battery pack.

3. The battery pack according to claim 2, characterized in that: The bracket comprises a first bracket component for fixing the first battery pack and a second bracket component for fixing the second battery pack, and the guide structure spans the first bracket component and the second bracket component.

4. A battery pack, comprising a shell, a battery pack accommodated in the shell, and a bracket for mounting the battery pack, the shell having a first ventilation hole penetrating a top wall, a second ventilation hole penetrating a bottom wall, and an air collecting port protruding downward from the top wall, the air collecting port covering the first ventilation hole, the first ventilation hole, the second ventilation hole, and the air collecting port forming an air flow channel for cooling the battery pack; characterized in that: The bracket is provided with a guide structure, and in a first plane, the ratio of the overlapping area of ​​the air collecting port and the guide structure to the projected area of ​​the air collecting port is not less than 0.

5.

5. A battery pack, comprising a housing and a battery pack housed in the housing, wherein the housing defines an air flow channel flowing through the battery pack; characterized in that: The battery pack includes a first battery pack, a second battery pack located behind the first battery pack, and a guide structure arranged in the air flow channel, the guide structure divides the air flow channel into a first air flow channel for cooling the first battery pack and a second air flow channel for cooling the second battery pack, the first air flow channel is independent of the second air flow channel.

6. The battery pack according to claim 5, characterized in that: The shell has a bracket for mounting the battery pack, the guide structure is connected to the bracket, the bracket has a first bracket assembly for fixing the first battery pack and a second bracket assembly for fixing the second battery pack, and the guide structure spans the first bracket assembly and the second bracket assembly.

7. The battery pack according to claim 6, characterized in that: The bracket has a first rib position, a second rib position and a third rib position protruding upward from the second bracket component, and a fourth rib position and a fifth rib position protruding upward from the first bracket component, the extension direction of the first rib position coincides with the extension direction of the fourth rib position, the extension direction of the third rib position coincides with the extension direction of the fifth rib position, the extension direction of the first rib position is parallel to the extension direction of the third rib position, and the extension direction of the first rib position is perpendicular to the extension direction of the second rib position, the first rib position, the second rib position, the third rib position, the fourth rib position and the fifth rib position are surrounded to form the guide structure, and the guide structure is U-shaped.

8. The battery pack according to claim 5, characterized in that: The shell has a first ventilation hole penetrating the top wall, a second ventilation hole penetrating the bottom wall, and an air collecting port protruding downward from the top wall, and the air collecting port is arranged around the first ventilation hole.

9. The battery pack according to claim 8, characterized in that: The air collecting port and the first ventilation hole are arranged to form a first chamber, and in the up and down directions of the battery pack, part of the air guide structure is located in the first chamber.

10. The battery pack according to claim 8, characterized in that: In the first plane, the ratio of the overlapping area of ​​the air collecting port and the air guide structure to the projected area of ​​the air collecting port is not less than 0.5.

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