Battery pack and vehicle

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack and a vehicle, the battery pack comprises a shell and a plurality of battery cells, and the shell is provided with a plurality of battery cell placement channels, a plurality of first heat dissipation channels and a plurality of second heat dissipation channels which extend in the front-back direction; at least one side of the battery cell placing channel in the left-right direction is provided with a first heat dissipation channel, and at least one side of the battery cell placing channel in the up-down direction is provided with a second heat dissipation channel; and at least one battery cell is arranged in each battery cell placing channel. The first heat dissipation channel in the battery pack can dissipate heat of at least one side of the battery cell in the battery cell placement channel in the left-right direction, and the second heat dissipation channel can dissipate heat of at least one side of the battery cell in the battery cell placement channel in the up-down direction, so that the battery cell in the battery cell placement channel can be quickly and fully dissipated; the problem that heat generated by the battery cell cannot be dissipated in time is solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and a vehicle. Background Art

[0002] In the battery pack assembly mode, since CTP (Cell To Pack, battery cells are directly assembled into a battery pack) eliminates the intermediate module, the space utilization inside the battery pack is improved, thereby increasing the energy density, while reducing the weight of the battery pack, which is beneficial to improving the endurance of the entire vehicle.

[0003] Since the cells in the battery pack will generate heat during the charging and discharging process, a heat dissipation channel is usually set between two adjacent cells to dissipate the heat. However, the layout density of the cells in the battery pack assembled in the CTP mode is higher, and the battery pack generates more heat. The heat cannot be dissipated in time only through the heat dissipation channel between two adjacent cells, which will affect the normal use of the battery pack and even lead to the risk of thermal runaway. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a battery pack and a vehicle to solve the problem that the heat generated by the battery cells cannot be dissipated in time.

[0005] An embodiment of the first aspect of the present application proposes a battery pack, comprising a shell and a plurality of battery cells, wherein the shell has a plurality of battery cell placement channels extending in the front-to-back direction, a plurality of first heat dissipation channels, and a plurality of second heat dissipation channels; the battery cell placement channel is provided with the first heat dissipation channel on at least one side in the left-right direction, and the battery cell placement channel is provided with the second heat dissipation channel on at least one side in the up-down direction; at least one battery cell is provided in each of the battery cell placement channels.

[0006] The battery pack provided in the embodiment of the present application includes a shell and multiple battery cells. The shell has multiple battery cell placement channels extending in the front-to-back direction, multiple first heat dissipation channels and multiple second heat dissipation channels. By arranging the first heat dissipation channel on at least one side of the battery cell placement channel in the left-right direction, and arranging the second heat dissipation channel on at least one side of the battery cell placement channel in the up-down direction, the first heat dissipation channel can dissipate heat for at least one side of the battery cell in the battery cell placement channel in the left-right direction, and the second heat dissipation channel can dissipate heat for at least one side of the battery cell in the up-down direction, so that the battery cells in the battery cell placement channel can dissipate heat quickly and fully, which solves the problem that the heat generated by the battery cells cannot be dissipated in time, ensures the normal use of the battery pack, and avoids the occurrence of thermal runaway.

[0007] In some embodiments, the battery cell placement channel and the first heat dissipation channel are arranged alternately in the left-right direction.

[0008] In some embodiments, the shell includes a shell body and multiple anti-collision protrusions, at least some of the anti-collision protrusions are arranged on the lower side of the shell body and are respectively located below the multiple battery cell placement channels, and the second heat dissipation channel is formed in the anti-collision protrusions.

[0009] In some embodiments, the shell further includes at least one first connecting member and at least one second connecting member, and the first connecting member and the second connecting member are respectively fixed at both ends of the shell body in the front-to-back direction; at least one first connecting channel is provided on the first connecting member, and at least one second connecting channel is provided on the second connecting member, and the first connecting channel, the second connecting channel and multiple second heat dissipation channels are connected in series.

[0010] In some embodiments, the battery pack further includes a liquid inlet and a liquid outlet disposed at the end of the shell body in the front-to-back direction;

[0011] Wherein, the liquid inlet and the liquid outlet are both arranged on the first connecting member or the second connecting member; or,

[0012] The liquid inlet and the liquid outlet are respectively arranged on the first connecting member and the second connecting member; or,

[0013] The liquid inlet and the liquid outlet are both arranged on the shell body.

[0014] In some embodiments, the first connecting member is provided with one, and the first connecting member is provided with a plurality of first connecting channels; and / or, the second connecting member is provided with one, and the second connecting member is provided with a plurality of second connecting channels.

[0015] In some embodiments, at least two shells are arranged along the left-right direction, and a clamping structure is provided between two adjacent shells to fix the two shells together.

[0016] In some embodiments, two adjacent shells are connected by welding.

[0017] In some embodiments, the snap-fit ​​structure includes a slot and a buckle, and opposite sides of two adjacent shells are respectively provided with a groove and a protrusion, the buckle is provided on the upper slot wall and the lower slot wall of the groove, the slot is provided on the upper surface and the lower surface of the protrusion, and the notch of the slot faces away from the protrusion.

[0018] In some embodiments, the housing further includes an end plate for covering a port of the battery cell placement channel, and the end plate is provided with a through hole corresponding to the first heat dissipation channel.

[0019] In some embodiments, the battery cell is a soft-pack battery cell; and / or the shell is an aluminum profile shell.

[0020] A second aspect of the present application provides a vehicle, which includes a battery pack as described in the first aspect.

[0021] The vehicle adopts all the embodiments of the above-mentioned battery pack, and thus has at least all the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 is a schematic diagram of the structure of a battery pack provided in some embodiments of the present application;

[0025] Figure 2 yes Figure 1 A side view of the battery pack shown with the end plates removed;

[0026] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle shell and the battery core;

[0027] Figure 4 yes Figure 3 A schematic diagram of the structure of the middle shell;

[0028] Figure 5 yes Figure 2 The enlarged view of point A in the middle;

[0029] Figure 6 is a schematic structural diagram of a battery pack provided in some embodiments of the present application from another perspective;

[0030] Figure 7 This is a schematic diagram of the structure of battery cells connected in series provided in some embodiments of the present application;

[0031] Figure 8 yes Figure 7 Schematic diagram of the structure of the battery cell.

[0032] The meanings of the marks in the figure are:

[0033] 10. Battery pack;

[0034] 11. Shell; 111. Shell body; 1111. Cell placement channel; 1112. First heat dissipation channel; 1113. Groove; 1114. Protrusion; 112. Anti-collision convex part; 1121. Second heat dissipation channel; 113. First connecting member; 1131. First connecting channel; 114. Second connecting member; 1141. Second connecting channel; 115. End plate; 1151. Through hole;

[0035] 12. Battery cell; 121. Battery cell positive electrode; 122. Battery cell negative electrode;

[0036] 13. snap-fit ​​structure; 131. snap slot; 132. snap buckle;

[0037] 14. Butt joints;

[0038] 15. Liquid inlet;

[0039] 16. Liquid outlet;

[0040] 17. External positive electrode;

[0041] 18. External negative electrode;

[0042] 19. Connect the copper busbar. DETAILED DESCRIPTION

[0043] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0045] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0049] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application 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. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0051] During the use of the battery pack, the cells inside it generate heat due to charging and discharging. In order to dissipate the heat, a heat dissipation channel is usually set between two adjacent cells. For battery packs with a high density of cell layout, the battery pack generates more heat, and the heat cannot be dissipated in time only through the heat dissipation channel between two adjacent cells, affecting the normal use of the battery pack.

[0052] In order to solve the problem that the heat generated by the battery cells cannot be dissipated in time, the present application provides a battery pack and a vehicle.

[0053] The first embodiment of the present application provides a battery pack. Figure 1 and Figure 3 The battery pack 10 includes a shell 11 and a plurality of battery cells 12. The shell 11 has a plurality of battery cell placement channels 1111, a plurality of first heat dissipation channels 1112 and a plurality of second heat dissipation channels 1121 extending in the front-to-back direction. The battery cell placement channel 1111 is provided with a first heat dissipation channel 1112 on at least one side in the left-right direction, and the battery cell placement channel 1111 is provided with a second heat dissipation channel 1121 on at least one side in the up-down direction. At least one battery cell 12 is provided in each battery cell placement channel 1111.

[0054] The shell 11 is used to install the battery cell 12, and the shell 11 protects the battery cell 12. It can be understood that the shell 11 can be a shell made of metal material, for example, the metal material can be an aluminum profile shell, a stainless steel shell, etc., wherein the aluminum profile is light in weight, which is conducive to reducing the overall weight of the battery pack 10; the shell 11 can also be a shell made of non-metallic material, for example, the non-metallic material can be a carbon fiber composite material, plastic, etc.

[0055] The front-to-back direction is Figure 1 The X direction in the left and right directions are Figure 1 The Y direction in the above example is Figure 1 The Z direction in .

[0056] The plurality of cell placement channels 1111 extend in the front-to-back direction, and the plurality of cell placement channels 1111 are arranged in the left-to-right direction. The front and rear ends of the cell placement channels 1111 are both provided with openings. During installation, the cell 12 is loaded into the cell placement channels 1111 through the front opening or the rear opening of the cell placement channels 1111. The cross-section of the cell placement channels 1111 can be various, for example, circular, rectangular, elliptical, etc.

[0057] A first heat dissipation channel 1112 is provided on at least one side of the battery cell placement channel 1111 in the left-right direction, which means that a first heat dissipation channel 1112 is provided on both the left and right sides of the battery cell placement channel 1111 in the left-right direction, or a first heat dissipation channel 1112 is provided on the left or right side of the battery cell placement channel 1111 in the left-right direction.

[0058] A second heat dissipation channel 1121 is provided on at least one side of the battery cell placement channel 1111 in the up and down direction, which means that the battery cell placement channel 1111 is provided with a second heat dissipation channel 1121 on both the upper and lower sides in the up and down direction, or a second heat dissipation channel 1121 is provided on the upper or lower side of the battery cell placement channel 1111 in the up and down direction.

[0059] The plurality of first heat dissipation channels 1112 all extend in the front-to-back direction, and the plurality of first heat dissipation channels 1112 are arranged in the left-to-right direction; the first heat dissipation channels 1112 can be used to dissipate heat from at least one side of the battery cell 12 in the battery cell placement channel 1111 in the left-to-right direction. The cross-section of the first heat dissipation channel 1112 can be various, for example, circular, rectangular, elliptical, etc.; the cross-section of the first heat dissipation channel 1112 refers to the cross section of the first heat dissipation channel 1112 cut in the left-to-right direction.

[0060] In this embodiment, the front and rear ends of the first heat dissipation channel 1112 are both provided with openings. It can be understood that the first heat dissipation channel 1112 can be an air cooling channel to take away the heat generated on the left and / or right sides of the battery cell 12 through cold air. For example, cold air can enter from the front opening of the first heat dissipation channel 1112 and be discharged from the rear opening of the first heat dissipation channel 1112; or, cold air can enter from the rear opening of the first heat dissipation channel 1112 and be discharged from the front opening of the first heat dissipation channel 1112. Alternatively, the first heat dissipation channel 1112 can be a liquid cooling channel to take away the heat generated on the left and / or right sides of the battery cell 12 through a coolant. For example, the coolant can enter from the front opening of the first heat dissipation channel 1112 and be discharged from the rear opening of the first heat dissipation channel 1112; or, the coolant can enter from the rear opening of the first heat dissipation channel 1112 and be discharged from the front opening of the first heat dissipation channel 1112.

[0061] The plurality of second heat dissipation channels 1121 all extend in the front-to-back direction, and the plurality of second heat dissipation channels 1121 are arranged in the left-to-right direction; the second heat dissipation channels 1121 can be used to dissipate heat from at least one side of the battery cell 12 in the battery cell placement channel 1111 in the up-down direction. The cross-section of the second heat dissipation channel 1121 can be various, for example, circular, rectangular, elliptical, etc. The cross-section of the second heat dissipation channel 1121 refers to the section of the second heat dissipation channel 1121 cut in the left-to-right direction.

[0062] In the battery pack 10 of the present embodiment, the first heat dissipation channel 1112 extends in the front-to-back direction and is arranged in the left-to-right direction to form a plurality of substantially parallel long strip heat dissipation channels. Similarly, the second heat dissipation channel 1121 also forms a plurality of substantially parallel long strip heat dissipation channels, which is more suitable for configuring long strip battery cells, including but not limited to configuring thin rectangular battery cells. The large surface of the rectangular battery cell extending along its length direction is cooled by the first heat dissipation channel 1112, and the small surface of the rectangular battery cell extending along its length direction is cooled by the second heat dissipation channel 1121.

[0063] In this embodiment, the front and rear ends of the second heat dissipation channel 1121 are both provided with openings. It can be understood that the second heat dissipation channel 1121 can be an air cooling channel to take away the heat generated by the upper side and / or the lower side of the battery cell 12 through cold air, for example, cold air can enter from the front opening of the second heat dissipation channel 1121 and be discharged from the rear opening of the second heat dissipation channel 1121; or, cold air can enter from the rear opening of the second heat dissipation channel 1121 and be discharged from the front opening of the second heat dissipation channel 1121. Alternatively, the second heat dissipation channel 1121 can be a liquid cooling channel to take away the heat generated by the upper side and / or the lower side of the battery cell 12 through a coolant, for example, the coolant can enter from the front opening of the second heat dissipation channel 1121 and be discharged from the rear opening of the second heat dissipation channel 1121; or, the coolant can enter from the rear opening of the second heat dissipation channel 1121 and be discharged from the front opening of the second heat dissipation channel 1121.

[0064] The battery cell 12 may have a variety of shapes, but must be compatible with the battery cell placement channel 1111 , for example, a cylindrical structure, a square structure, etc. Among them, one, two, or three or more battery cells 12 may be arranged in each battery cell placement channel 1111 .

[0065] The battery pack 10 provided in the embodiment of the present application includes a shell 11 and a plurality of battery cells 12. The shell 11 has a plurality of battery cell placement channels 1111 extending in the front-to-back direction, a plurality of first heat dissipation channels 1112 and a plurality of second heat dissipation channels 1121. By arranging the first heat dissipation channel 1112 on at least one side of the battery cell placement channel 1111 in the left-right direction, and arranging the second heat dissipation channel 1121 on at least one side of the battery cell placement channel 1111 in the up-down direction, the first heat dissipation channel 1112 can dissipate heat for at least one side of the battery cell 12 in the battery cell placement channel 1111 in the left-right direction, and the second heat dissipation channel 1121 can dissipate heat for at least one side of the battery cell 12 in the up-down direction in the battery cell placement channel 1111, so that the battery cell 12 in the battery cell placement channel 1111 can dissipate heat quickly and fully, thereby solving the problem that the heat generated by the battery cell 12 cannot be dissipated in time, ensuring the normal use of the battery pack 10, and avoiding the occurrence of thermal runaway.

[0066] Please also refer to Figure 3 and Figure 4 In some embodiments, the battery cell placement channel 1111 and the first heat dissipation channel 1112 are alternately arranged in the left-right direction.

[0067] The alternating arrangement of the battery cell placement channels 1111 and the first heat dissipation channels 1112 means that, in the left-right direction, a battery cell placement channel 1111 is provided between any two adjacent first heat dissipation channels 1112; it can be understood that the first heat dissipation channels 1112 can be provided on the left side of the leftmost battery cell placement channel 1111 and on the right side of the rightmost battery cell placement channel 1111, that is, the first heat dissipation channels 1112 are provided on both the left and right sides of each battery cell placement channel 1111; or, the first heat dissipation channel 1112 can be provided only on the left side of the leftmost battery cell placement channel 1111 or on the right side of the rightmost battery cell placement channel 1111; or, the first heat dissipation channel 1112 may not be provided on the left side of the leftmost battery cell placement channel 1111 and on the right side of the rightmost battery cell placement channel 1111.

[0068] Optionally, each cell placement channel 1111 is independent, that is, each cell placement channel 1111 is not connected to each other. In this way, the safety of the cell 12 in the cell placement channel 1111 can be ensured, and the influence of the adjacent cell 12 after the thermal runaway occurs can be avoided.

[0069] By adopting the above technical solution, the first heat dissipation channels 1112 are provided on both opposite sides of the battery cell placement channel 1111 in the left and right directions, that is, the battery cells 12 in the battery cell placement channel 1111 can dissipate heat on both sides in the left and right directions, further improving the heat dissipation efficiency.

[0070] In other embodiments, the cell placement channels 1111 and the first heat dissipation channels 1112 may not be arranged alternately. For example, in the left-right direction, two cell placement channels 1111 are provided between any two adjacent first heat dissipation channels 1112, that is, the first heat dissipation channels 1112 are provided only on one side of the cell placement channels 1111; or, in the left-right direction, two first heat dissipation channels 1112 are provided on the left and / or right sides of each cell placement channel 1111. Of course, the plurality of cell placement channels 1111 and the first heat dissipation channels 1112 may also be arranged partially alternately and partially not alternately.

[0071] Please refer to Figure 4 In some embodiments, the shell 11 includes a shell body 111 and multiple anti-collision protrusions 112, at least part of the anti-collision protrusions 112 are arranged on the lower side of the shell body 111 and are respectively located below the multiple battery cell placement channels 1111, and the second heat dissipation channel 1121 is formed in the anti-collision protrusions 112.

[0072] The shell body 111 has the above-mentioned battery cell placement channel 1111 and the first heat dissipation channel 1112. Optionally, the shell body 111 can be integrally formed by an extrusion process.

[0073] Optionally, the plurality of anti-collision convex portions 112 are arranged in the front-to-back direction, that is, the arrangement direction of the anti-collision convex portions 112 is consistent with the extension direction of the first heat dissipation channel 1112. Since the bottom of the battery pack 10 is more susceptible to impact after the battery pack 10 is installed on an electrical device, such as a vehicle, the anti-collision convex portions 112 are arranged on the lower side of the shell body 111, and the anti-collision convex portions 112 are located below the battery cell placement channel 1111, so as to effectively protect the battery cells 12 in the battery cell placement channel 1111.

[0074] At least part of the anti-collision protrusions 112 are arranged on the lower side of the shell body 111, which can be understood as that all of the anti-collision protrusions 112 are arranged on the lower side of the shell body 111; or, part of the anti-collision protrusions 112 are arranged on the lower side of the shell body 111, and part of the anti-collision protrusions 112 are arranged on other sides of the shell body 111, for example, the upper side of the shell body 111.

[0075] The second heat dissipation channel 1121 is formed in the anti-collision convex part 112, and the second heat dissipation channel 1121 can cooperate with the first heat dissipation channel 1112 to dissipate heat from the battery cell 12 to improve the heat dissipation efficiency. Moreover, the second heat dissipation channel 1121 forms an energy absorption space. When impacted, the energy absorption space of the anti-collision convex part 112 can shrink and absorb part of the impact energy, further reducing the impact force on the battery cell 12, so that the anti-collision convex part 112 effectively protects the battery cell 12.

[0076] It can be understood that the anti-collision convex portion 112 can be integrally formed with the shell body 111, and the anti-collision convex portion 112 can be fixed (can be but not limited to welding) on ​​the shell body 111. Among them, the anti-collision convex portion 112 can have a variety of shapes, such as semicircular, rectangular, trapezoidal, etc.

[0077] By adopting the above technical scheme, on the first hand, at least part of the anti-collision protrusion 112 is arranged on the lower side of the shell body 111 and is respectively located under the multiple battery cell placement channels 1111, which can prevent the bottom of the battery pack 10 from directly hitting the battery cell 12 when it is hit, so as to reduce the impact on the battery cell 12, thereby improving the safety of the battery pack 10; on the second hand, the second heat dissipation channel 1121 is formed in the anti-collision protrusion 112, so that the heat dissipation and anti-collision protection of the battery cell 12 are integrated together, which is beneficial to reducing the weight of the battery pack 10.

[0078] In other embodiments, the shell 11 includes a shell body 111, but does not include the anti-collision protrusion 112, and the shell body 111 itself is provided with a second heat dissipation channel 1121, and the second heat dissipation channel 1121 is located below the battery cell placement channel 1111; or, the shell 11 includes a shell body 111 and a heat dissipation base plate, the heat dissipation base plate is fixed (can be but not limited to welding) at the bottom of the shell body 111, and the heat dissipation base plate is provided with a second heat dissipation channel 1121.

[0079] Please also refer to Figure 1 and Figure 6 In some embodiments, the shell 11 further includes at least one first connecting member 113 and at least one second connecting member 114, and the first connecting member 113 and the second connecting member 114 are respectively fixed at both ends of the shell body 111 in the front-to-back direction; at least one first connecting channel 1131 is provided on the first connecting member 113, and at least one second connecting channel 1141 is provided on the second connecting member 114, and the first connecting channel 1131, the second connecting channel 1141 and the plurality of second heat dissipation channels 1121 are connected in series.

[0080] The first connecting member 113 and the second connecting member 114 can be of various types, as long as the first connecting channel 1131 , the second connecting channel 1141 and the plurality of second heat dissipating channels 1121 can be connected in series.

[0081] The number of the first connecting member 113 and the second connecting member 114 can be set as needed, for example, one, two, or three or more.

[0082] It can be understood that the first connecting member 113 and the second connecting member 114 can be fixed to the shell body 111 by welding, clamping, riveting, screw connection and the like.

[0083] The number of the first connection channels 1131 and the second connection channels 1141 can be set as needed, for example, one, two, or three or more. Each first connection channel 1131 and each second connection channel 1141 are connected to two adjacent second heat dissipation channels 1121.

[0084] After the first connecting channel 1131, the second connecting channel 1141 and the plurality of second heat dissipation channels 1121 are connected in series, a complete heat dissipation path is formed, which can cover the bottom of all the battery cell placement channels 1111, and it is not necessary for each second heat dissipation channel 1121 to pass cold air or coolant separately.

[0085] In other embodiments, the first connecting member 113 and the second connecting member 114 may not be provided.

[0086] Please also refer to Figure 1 and Figure 6 In some embodiments, the battery pack 10 further includes a liquid inlet 15 and a liquid outlet 16 disposed at the ends of the shell body 111 in the front-to-back direction;

[0087] Optionally, the liquid inlet 15 and the liquid outlet 16 can be both arranged on the first connecting member 113, in which case the liquid inlet 15 and the liquid outlet 16 are respectively connected to the two first connecting channels 1131 at the head and the tail; or, the liquid inlet 15 and the liquid outlet 16 can be both arranged on the second connecting member 114, in which case the liquid inlet 15 and the liquid outlet 16 are respectively connected to the two second connecting channels 1141 at the head and the tail.

[0088] Optionally, the liquid inlet 15 and the liquid outlet 16 may also be respectively arranged on the first connecting member 113 and the second connecting member 114. In this case, the liquid inlet 15 and the liquid outlet 16 are respectively communicated with the first connecting channel 1131 and the second connecting channel 1141.

[0089] Optionally, the liquid inlet 15 and the liquid outlet 16 can be both arranged on the shell body 111, for example, the end surface or the bottom surface of the shell body 111. In this case, the liquid inlet 15 and the liquid outlet 16 are respectively connected to the two second heat dissipation channels 1121 at the head and the tail.

[0090] When multiple second heat dissipation channels 1121 are connected in series, the cooling route is: Figure 6 The dotted line.

[0091] When the first heat dissipation channel 1112 is air-cooled and the second heat dissipation channel 1121 is liquid-cooled, the first heat dissipation channel 1112 is air-cooled, which can effectively reduce the weight of the battery pack 10. The port diameter of the first heat dissipation channel 1112 can be larger than that of the second heat dissipation channel 1121. In a natural state (meaning that the wind is not sent in by power, but the wind enters automatically), the wind is easier to enter, and the interior of the channel is wider, the heat dissipation area is large, the heat dissipation efficiency is high, and the heat dissipation effect is good;

[0092] The second heat dissipation channel 1121 is arranged in the up and down direction of the shell body 111. The second heat dissipation channel 1121 is liquid-cooled, which can effectively reduce the volume of the battery pack 10. The port diameter of the second heat dissipation channel 1121 is much smaller than that of the first heat dissipation channel 1112, so it is not easy for wind to enter. The inside of the channel is narrow, and the air cooling effect is not good. Therefore, the second heat dissipation channel 1121 chooses liquid cooling to improve the heat dissipation effect. In addition, due to the small internal size of the second heat dissipation channel 1121, there is no need to introduce a large amount of coolant, which has little effect on the weight;

[0093] Through the coordination of air cooling and liquid cooling, the advantages of both can be combined to make up for the shortcomings, further improve the heat dissipation efficiency, and also facilitate the design of the battery pack 10 to reduce weight and size.

[0094] In some embodiments, one first connection member 113 is provided, and a plurality of first connection channels 1131 are provided on the first connection member 113 ; one second connection member 114 is provided, and a plurality of second connection channels 1141 are provided on the second connection member 114 .

[0095] Optionally, the first connecting member 113 and the second connecting member 114 may both be connecting plates.

[0096] Providing only one first connector 113 and one second connector 114 facilitates assembly of the battery pack 10 .

[0097] In other embodiments, the first connecting member 113 is provided with one, and the first connecting member 113 is provided with multiple first connecting channels 1131, and the second connecting member 114 is provided with multiple, and each second connecting member 114 is provided with a second connecting channel 1141; or, the second connecting member 114 is provided with one, and the second connecting member 114 is provided with multiple second connecting channels 1141, and the first connecting member 113 is provided with multiple, and each first connecting member 113 is provided with a first connecting channel 1131; or, the first connecting member 113 is provided with multiple, and each first connecting member 113 is provided with a first connecting channel 1131, and the second connecting member 114 is provided with multiple, and each second connecting member 114 is provided with a second connecting channel 1141.

[0098] Optionally, a plurality of first connecting members 113 are provided, each of which is provided with a first connecting channel 1131 , and the first connecting member 113 may be a connecting plate or a connecting pipe.

[0099] Optionally, a plurality of second connecting members 114 are provided, each of which is provided with a second connecting channel 1141 , and the second connecting member 114 may be a connecting plate or a connecting pipe.

[0100] In some embodiments, a plurality of second heat dissipation channels 1121 are provided, and the number of the second heat dissipation channels 1121 is an even number.

[0101] That is, the number of the second heat dissipation channels 1121 is 2N, where N is an integer greater than or equal to 1.

[0102] By adopting the above technical solution, the liquid inlet 15 and the liquid outlet 16 of the second heat dissipation channel 1121 are located on the same side, so that the liquid inlet 15 and the liquid outlet 16 can be connected to the pipeline.

[0103] In other embodiments, a plurality of second heat dissipation channels 1121 are provided, and the number of the second heat dissipation channels 1121 may be an odd number, that is, the number of the second heat dissipation channels 1121 is 2N+1, where N is an integer greater than or equal to 1.

[0104] Please also refer to Figure 2 , Figure 3 and Figure 6 In some embodiments, at least two shells 11 are arranged along the left-right direction, and a snap-fit ​​structure 13 is provided between two adjacent shells 11 to fix the two shells together.

[0105] Optionally, four shells 11 are arranged along the left-right direction, and a clamping structure 13 is provided between any two adjacent shells 11 .

[0106] In other embodiments, two, three, five, etc. shells 11 may be arranged along the left-right direction.

[0107] The use of the snap-fit ​​structure 13 facilitates the splicing of two adjacent shells 11, thereby improving the assembly efficiency of the battery pack 10; moreover, the snap-fit ​​structure 13 can also strengthen the splicing of two adjacent shells 11, thereby ensuring the structural strength of the splicing.

[0108] In other embodiments, two adjacent shells 11 may be fixedly connected by other means, such as screw connection, welding, etc.

[0109] In some embodiments, two adjacent shells 11 are connected by welding.

[0110] After two adjacent shells 11 are fixedly connected by the clamping structure 13, a butt joint 14 is formed at the butt joint positions of the upper side and the lower side of the two adjacent shells 11. The butt joint 14 extends in the front-to-back direction.

[0111] The two adjacent shells 11 are welded together through a butt joint 14 formed between the two adjacent shells 11 to improve the firmness of the two adjacent shells 11 after splicing, thereby ensuring the stability of the battery pack 10.

[0112] In other embodiments, after two adjacent shells 11 are fixedly connected by the clamping structure 13 , if the stability is good, the two adjacent shells 11 do not need to be welded.

[0113] In other embodiments, after two adjacent shells 11 are fixedly connected by the clamping structure 13 , they may also be connected by screws to improve firmness.

[0114] Please also refer to Figure 4 and Figure 5 In some embodiments, the snap-fit ​​structure 13 includes a slot 131 and a buckle 132. A groove 1113 and a protrusion 1114 are respectively provided on opposite sides of two adjacent shells 11. The buckle 132 is provided on the upper and lower groove walls of the slot 1113. The slot 131 is provided on the upper and lower surfaces of the protrusion 1114. The notch of the slot 131 faces away from the protrusion 1114.

[0115] The opposite side of two adjacent shells 11 refers to a side of one of the two adjacent shells 11 facing the other shell 11 .

[0116] The notch of the slot 131 faces away from the protrusion 1114 , which means that the notch of the slot 131 on the upper surface of the protrusion 1114 faces upward, and the notch of the slot 131 on the lower surface of the protrusion 1114 faces downward, that is, the notches of the two slots 131 are arranged opposite to each other.

[0117] Optionally, both the card slot 131 and the card buckle 132 extend in the front-to-back direction and extend from the front end of the shell 11 to the rear end of the shell 11 to increase the length of the two and further ensure the reliability of the two adjacent shells 11 after splicing.

[0118] It can be understood that the cross-sectional shapes of the slot 131 and the buckle 132 can be various, for example, the cross-sectional shapes of the slot 131 and the buckle 132 can be circular, elliptical, trapezoidal, etc.

[0119] The buckle 132 on the upper groove wall of the groove 1113 protrudes in a direction facing away from the upper groove wall, and the buckle 132 on the lower groove wall of the groove 1113 protrudes in a direction facing away from the lower groove wall.

[0120] When two adjacent shells 11 are spliced ​​together, it can be understood that the protrusion 1114 of one shell 11 can be inserted into the groove 1113 of the other shell 11 along the left-right direction. At this time, the upper groove wall and the lower groove wall of the groove 1113 need to have a certain elasticity so that the buckle 132 can be inserted into the slot 131 along the up-down direction; or, the protrusion 1114 of one shell 11 can be inserted into the groove 1113 of the other shell 11 along the front-to-back direction. At this time, the upper groove wall and the lower groove wall of the groove 1113 are not elastic, and the buckle 132 can also be smoothly inserted into the slot 131 along the front-to-back direction.

[0121] By adopting the above technical solution, the splicing direction of the two adjacent shells 11 is perpendicular to the direction in which the buckle 132 is inserted into the slot 131. After the buckle 132 is inserted into the slot 131, the two adjacent shells 11 are not easy to separate, thereby ensuring the reliability of the two adjacent shells 11 after splicing.

[0122] In other embodiments, the splicing direction of two adjacent shells 11 is the same as the direction in which the buckle 132 is inserted into the slot 131, that is, the opening of the slot 131 is facing the left or right side. At this time, it is necessary to add a welding or screw fixing process to ensure the reliability of the two adjacent shells 11 after splicing.

[0123] It should be noted that the splicing direction of the two shells 11 is the left-right direction.

[0124] In some embodiments, the battery cell 12 is a soft-pack battery cell.

[0125] Soft-pack batteries usually use aluminum-plastic film or aluminum foil to protect the internal structure and prevent the internal liquid from flowing out.

[0126] Compared with hard-shell batteries, soft-pack batteries eliminate the need for metal shells and metal covers. Aluminum-plastic film or aluminum foil is used as the outer shell of soft-pack batteries, which can greatly reduce the overall weight of the battery pack 10 and help improve the endurance of the entire vehicle.

[0127] In other embodiments, when weight is not considered, the battery cell 12 may also be a hard shell battery cell.

[0128] Please also refer to Figure 1 and Figure 2 In some embodiments, the housing 11 further includes an end plate 115 for covering a port of the cell placement channel 1111 , and the end plate 115 is provided with a through hole 1151 corresponding to the first heat dissipation channel 1112 .

[0129] Optionally, two end plates 115 are provided, and the two end plates 115 are respectively fixed to the front end and the rear end of the housing 11 to cover the front port and the rear port of the cell placement channel 1111. The end plates 115 can be fixed to the housing 11 by welding, screw connection, etc.

[0130] The end plate 115 is provided with a plurality of through holes 1151 , and the plurality of through holes 1151 are respectively arranged corresponding to and communicated with the plurality of first heat dissipation channels 1112 to ensure the inflow and outflow of cold air.

[0131] By adopting the above technical solution, external water vapor, dust, etc. are prevented from entering the battery cell placement channel 1111, so as to protect the battery cells 12 in the battery cell placement channel 1111, thereby improving the service life of the battery pack 10.

[0132] In other embodiments, a connecting channel may be provided on the end plate 115 so that the first heat dissipation channels 1112 are connected in series to be suitable for liquid cooling.

[0133] Please also refer to Figure 2 , Figure 7 and Figure 8 In some embodiments, all the cells 12 in the battery pack 10 are connected in series. Specifically, the cell 12 has a positive electrode 121 and a negative electrode 122. In two adjacent cells 12 in the same cell placement channel 1111, the positive electrode 121 of one cell 12 is connected to the negative electrode 122 of the other cell 12; the two cells 12 in two adjacent cell placement channels 1111 are connected by connecting copper bars 19; after being connected in series in the above manner, one end is led out through the external positive electrode 17, and the other end is led out through the external negative electrode 18 to achieve the output of electric energy.

[0134] In other embodiments, one battery cell 12 may be placed in each battery cell placement channel 1111 .

[0135] The second aspect of the present application provides a vehicle, wherein the vehicle includes a battery pack 10 as in the first aspect, wherein the vehicle also includes a frame, and the battery pack 10 is mounted on the frame for supplying power to electrical devices of the vehicle.

[0136] The vehicle provided in the present application, based on the above-mentioned battery pack 10, avoids the occurrence of thermal runaway and ensures the safe operation of the vehicle.

[0137] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that: The invention comprises a shell and a plurality of battery cells, wherein the shell has a plurality of battery cell placement channels extending in the front-to-back direction, a plurality of first heat dissipation channels and a plurality of second heat dissipation channels; the battery cell placement channels are provided with the first heat dissipation channels on at least one side in the left-right direction, and the battery cell placement channels are provided with the second heat dissipation channels on at least one side in the up-down direction; and each of the battery cell placement channels is provided with at least one of the battery cells.

2. The battery pack according to claim 1, wherein: The battery cell placement channels and the first heat dissipation channels are arranged alternately in the left-right direction.

3. The battery pack according to claim 1, wherein: The shell includes a shell body and a plurality of anti-collision convex parts, at least some of the anti-collision convex parts are arranged on the lower side of the shell body and are respectively located below the plurality of battery cell placement channels, and the second heat dissipation channel is formed in the anti-collision convex parts.

4. The battery pack according to claim 3, wherein: The shell also includes at least one first connecting member and at least one second connecting member, and the first connecting member and the second connecting member are respectively fixed to the two ends of the shell body in the front-to-back direction; the first connecting member is provided with at least one first connecting channel, and the second connecting member is provided with at least one second connecting channel, and the first connecting channel, the second connecting channel and multiple second heat dissipation channels are connected in series.

5. The battery pack according to claim 4, characterized in that: The battery pack further includes a liquid inlet and a liquid outlet disposed at the end of the shell body in the front-to-back direction; Wherein, the liquid inlet and the liquid outlet are both arranged on the first connecting member or the second connecting member; or, The liquid inlet and the liquid outlet are respectively arranged on the first connecting member and the second connecting member; or, The liquid inlet and the liquid outlet are both arranged on the shell body.

6. The battery pack according to claim 4, wherein: The first connecting member is provided with one, and the first connecting member is provided with a plurality of first connecting channels; and / or the second connecting member is provided with one, and the second connecting member is provided with a plurality of second connecting channels.

7. The battery pack according to any one of claims 1 to 6, characterized in that: At least two shells are arranged along the left-right direction, and a clamping structure is provided between two adjacent shells to fix the two shells.

8. The battery pack according to claim 7, wherein: Two adjacent shells are connected by welding.

9. The battery pack according to claim 7, wherein: The snap-fit ​​structure includes a slot and a buckle, and opposite sides of two adjacent shells are respectively provided with a groove and a protrusion, the buckle is arranged on the upper groove wall and the lower groove wall of the groove, the slot is arranged on the upper surface and the lower surface of the protrusion, and the notch of the slot faces away from the protrusion.

10. The battery pack according to any one of claims 1 to 6, characterized in that: The housing further comprises an end plate for covering a port of the cell placement channel, and the end plate is provided with a through hole corresponding to the first heat dissipation channel.

11. The battery pack according to any one of claims 1 to 6, characterized in that: The battery cell is a soft-pack battery cell; and / or the shell is an aluminum profile shell.

12. A vehicle, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 11.

Images