Battery pack

Abstract

The embodiment of the utility model provides a battery pack, the battery pack has a first direction and a second direction which are intersected, and the battery pack comprises a confluence piece, a plurality of current collectors and a plurality of cooling plates, the cooling plates extend in the first direction, and the multiple cooling plates are arranged at intervals in the second direction. The cooling plate is provided with a cooling channel, the current collector is connected to at least one end of the cooling plate in the first direction, the current collector is provided with a current collecting cavity, and the current collecting cavity is communicated with the cooling channel; the confluence piece extends in the second direction, the confluence piece is provided with a plurality of first interfaces arranged in the second direction, the current collectors are provided with second interfaces, and the first interfaces are communicated with the second interfaces, so that communication between the confluence piece and the plurality of current collectors is realized. Only the second interface arranged on the current collector is communicated with the first interface of the confluence piece, so that the number of connectors is reduced, the risk of liquid leakage is reduced, the installation process is simplified, and the production cost is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery pack. Background Art

[0002] In the prior art, the cooling system is also provided with a plurality of current collectors and a plurality of quick-connect water pipes. The current collectors are connected to the ends of the cooling plates, and the quick-connect water pipes are connected between two adjacent current collectors to achieve the circulation of the cooling medium.

[0003] However, in order to achieve the connection between the quick-connect water pipe and two adjacent current collectors, at least two connection ports are usually required to be provided on the current collector, which increases the number of connection ports in the battery pack, is prone to liquid leakage due to connection failure, and makes the installation process more cumbersome and the cost higher. Summary of the Utility Model

[0004] In view of the above problems, the present utility model is proposed to provide a battery pack that overcomes the above problems or at least partially solves the above problems.

[0005] In order to solve the above technical problems, the present application is implemented as follows:

[0006] An embodiment of the present application provides a battery pack, the battery pack having an intersecting first direction and second direction, the battery pack including: a bus bar, a plurality of current collectors, and a plurality of cooling plates;

[0007] The cooling plates extend along the first direction, and the plurality of cooling plates are spaced apart along the second direction;

[0008] The cooling plates are provided with cooling channels, the current collectors are connected to at least one end of the cooling plates along the first direction, the current collectors are provided with current collection cavities, and the current collection cavities are communicated with the cooling channels;

[0009] The bus bar extends along the second direction, the bus bar is provided with a plurality of first interfaces arranged along the second direction, the current collectors are provided with second interfaces, and the first interfaces are communicated with the second interfaces.

[0010] In the embodiments of the present application, multiple cooling plates are arranged at intervals along the second direction, and the current collector is connected to at least one end of the cooling plate along the first direction, that is, multiple current collectors are arranged at intervals along the second direction. The busbar extends along the second direction to connect the multiple current collectors arranged at intervals along the second direction, and by communicating between the first interface of the busbar and the second interface of the current collector, the communication between the busbar and the current collection cavities of the multiple current collectors is realized. Moreover, the current collection cavity of the current collector is communicated with the cooling channel of the cooling plate, so as to realize the circulation of the cooling medium among the cooling plate, the current collector and the busbar. In this way, the connection between two adjacent current collectors is realized through the busbar. It is only necessary to open a second interface on the current collector to communicate with the first interface of the busbar, without setting at least two connection ports on the current collector to realize the connection between the quick-insert water pipe and two adjacent current collectors, reducing the number of connection ports in the battery pack and reducing the risk of liquid leakage easily caused by connection failure. Moreover, the busbar can be connected to multiple current collectors at the same time, without connecting multiple quick-insert water pipes to two adjacent current collectors respectively, simplifying the installation process and also reducing the production cost.

[0011] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0013] Figure 1 is an exploded structural schematic diagram of a battery pack according to an embodiment of the present application;

[0014] Figure 2 is a partial structural schematic diagram of a battery pack according to an embodiment of the present application;

[0015] Figure 3 is a side view of a partial structure of a battery pack according to an embodiment of the present application;

[0016] Figure 4 is a battery pack according to an embodiment of the present application Figure 3 A cross-sectional structural schematic diagram of A-A therein;

[0017] Figure 5 is a battery pack according to an embodiment of the present application Figure 3 Another cross-sectional structural schematic diagram of A-A therein;

[0018] Figure 6 is a battery pack according to an embodiment of the present application Figure 3 A cross-sectional structural schematic diagram of B-B therein;

[0019] Figure 7 It is a schematic structural diagram of a current collector of a battery pack according to an embodiment of the present application;

[0020] Figure 8 It is another schematic structural diagram of a battery pack according to an embodiment of the present application;

[0021] Figure 9 It is a Figure 7 exploded structural diagram of a battery pack according to an embodiment of the present application;

[0022] Figure 10 It is a Figure 7 cross-sectional view of a battery pack according to an embodiment of the present application;

[0023] Figure 11 It is another schematic structural diagram of a current collector of a battery pack according to an embodiment of the present application;

[0024] Figure 12 It is a schematic structural diagram of an adapter of a battery pack according to an embodiment of the present application;

[0025] Figure 13 It is a cross-sectional view of an adapter of a battery pack according to an embodiment of the present application.

[0026] Reference numerals: 10 - housing; 20 - bus bar; 30 - current collector; 305 - current collection chamber; 40 - cooling plate; 50 - battery cell; 41 - cooling channel; 21 - first interface; 31 - second interface; 32 - groove; 33 - first wall; 34 - second wall; 311 - second opening; 211 - first opening; 303 - communication flow channel; 35 - first side wall; 36 - second side wall; 37 - third side wall; 38 - cavity; 39 - drain port; 60 - adapter; 24 - first sub-interface; 25 - second sub-interface; 301 - liquid inlet; 302 - liquid outlet; 61 - adapter flow channel; 70 - seal; 80 - adhesive; 51 - third wall; 52 - fourth wall; X - first direction; Y - second direction; Z - third direction. Detailed Description of the Embodiment

[0027] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0028] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "a plurality of" means two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0029] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this utility model.

[0030] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximately parallelism commonly recognized in engineering. For example, "parallel" means a state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. At the same time, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximately perpendicularity commonly recognized in engineering. For example, "perpendicular" means a state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distance or equal angle includes not only the case of absolute equality, but also the case of approximately equality commonly recognized in engineering, that is, there may be a certain error, such as a state where the tolerance range is -1% to 1%.

[0031] In the description of this utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Refer to Figures 1 to 13 , which shows a schematic structural diagram of a battery pack described in an embodiment of this application. The battery pack has an intersecting first direction X and second direction Y. The battery pack may specifically include: a bus bar 20, a plurality of current collectors 30, and a plurality of cooling plates 40;

[0033] The cooling plate 40 extends along the first direction X, and a plurality of cooling plates 40 are arranged at intervals along the second direction Y;

[0034] The cooling plate 40 is provided with a cooling channel 41. The current collector 30 is connected to at least one end of the cooling plate 40 along the first direction X. The current collector 30 is provided with a current collecting cavity 305, and the current collecting cavity 305 is communicated with the cooling channel 41;

[0035] The bus bar 20 extends along the second direction Y. The bus bar 20 is provided with a plurality of first interfaces 21 arranged along the second direction Y. The current collector 30 is provided with a second interface 31. The first interface 21 is communicated with the second interface 31 to realize the connection between the bus bar 20 and the plurality of current collectors 30.

[0036] In the embodiment of the present application, a plurality of cooling plates 40 are arranged at intervals along the second direction Y. The current collector 30 is connected to at least one end of the cooling plate 40 along the first direction X, that is, a plurality of current collectors 30 are arranged at intervals along the second direction Y. The bus bar 20 extends along the second direction Y to realize the connection of the plurality of current collectors 30 arranged at intervals along the second direction Y, and by communicating between the first interface 21 of the bus bar 20 and the second interface 31 of the current collector 30, the connection between the current collecting cavity 305 of the bus bar 20 and the plurality of current collectors 30 is realized. And the current collecting cavity 305 of the current collector 30 is communicated with the cooling channel 41 of the cooling plate 40 to realize the circulation of the cooling medium among the cooling plate 40, the current collector 30 and the bus bar 20.

[0037] In this way, the connection between two adjacent current collectors 30 is realized through the bus bar 20. Only by opening the second interface 31 on the current collector 30 to communicate with the first interface 21 of the bus bar 20, it is not necessary to set at least two connection ports on the current collector 30 to realize the connection between the quick-insert water pipe and two adjacent current collectors 30, reducing the number of connection ports in the battery pack and reducing the risk of liquid leakage easily caused by connection failure. And the bus bar 20 can be connected to a plurality of current collectors 30 at the same time, without connecting a plurality of quick-insert water pipes to two adjacent current collectors 30 respectively, simplifying the installation process and also reducing the production cost.

[0038] Specifically, in the embodiment of the present application, the bus bar 20 is provided with a plurality of first interfaces 21 along the second direction Y, and each first interface 21 of the bus bar 20 is oppositely arranged with a second interface 31 of a current collector 30. That is, the distance between two adjacent first interfaces 21 is the same as or close to the distance between two adjacent second interfaces 31 of the current collectors 30, so as to have a better alignment effect between the first interface 21 of the bus bar 20 and the second interface 31 of the current collector 30 and improve the installation accuracy. In addition, two adjacent first interfaces 21 of the bus bar 20 can be communicated with each other through a hollow cavity, so that the cooling medium in the bus bar 20 and the cooling medium between the plurality of current collectors 30 can circulate.

[0039] Exemplarily, in the embodiments of the present application, the bus bar 20 may be a strip-shaped structure. A plurality of current collectors 30 arranged at intervals include a head current collector 30 and a tail current collector 30 located at the head and tail ends respectively along the second direction Y. The length dimension of the strip-shaped bus bar 20 along the second direction Y is equal to or greater than the spacing dimension between the head current collector 30 and the tail current collector 30, so as to realize the connection between the bus bar 20 and the plurality of current collectors 30 distributed at intervals along the second direction Y.

[0040] Specifically, in the embodiments of the present application, the battery pack may include a first side and a second side arranged opposite to each other along the first direction X. The current collector 30 is connected to at least one end of the cooling plate 40 along the first direction X. That is, the current collector 30 may be connected to the first side of the battery pack, the current collector 30 may also be connected to the second side of the battery pack. In addition, the current collector 30 may also be respectively connected to the first side and the second side of the battery pack. As Figure 1 and Figure 2 shown, current collectors 30 are provided on both sides of the battery pack. The specific arrangement manner of the current collector 30 in the embodiments of the present application may not be limited.

[0041] Specifically, in the embodiments of the present application, the battery pack further includes a housing 10. The cooling plate 40, the current collector 30, and the bus bar 20 are all arranged inside the housing 10. The housing 10 provides an accommodation space for the cooling plate 40, the current collector 30, and the bus bar 20 and plays a protective role.

[0042] In the embodiments of the present application, exemplarily, the cooling plate 40 may be a flat metal structure, preferably an aluminum plate or an aluminum alloy plate, etc., so that the cooling plate 40 has good heat conduction performance and is light in weight. In addition, the cooling plate 40 may be a stamping brazing cooling plate 40 or an inflated cooling plate 40, etc. The specific type and material of the cooling plate 40 in the embodiments of the present application may not be limited. The cooling channels 41 of the cooling plate 40 are used to transport a cooling medium, such as water glycol (a mixture of water and ethylene glycol) or a cooling gas, etc. The number of the cooling channels 41 may be multiple. The multiple cooling channels 41 are arranged at intervals and are communicated with each other through the current collecting cavity 305 of the current collector 30.

[0043] When the included angle formed by the intersection of the first direction X and the second direction Y of the battery pack is 90°, that is, the first direction X is perpendicular to the second direction Y, it is convenient to set the layout positions of the cooling plate 40, the current collector 30, and the bus bar 20, which is beneficial to improving the space utilization rate.

[0044] In the embodiments of the present application, the battery pack may include battery cells. For example, the battery cells may be square or cylindrical, or may be soft packs, etc. The embodiments of the present application may not limit the specific type of the battery cells. The battery pack may be applied to electrical equipment, such as vehicles, energy storage cabinets, or aircraft, etc. The embodiments of the present application may not limit the specific type of the electrical equipment. The vehicle may specifically include small cars, medium-sized cars, sedan cars, trucks, trailers, CDV (CXr Derived VXn, a van based on a sedan platform), MPV (multi-Purpose Vehicles), SUV (Sport Utility Vehicles), etc. The embodiments of the present application may not limit any of these.

[0045] Optionally, in the embodiments of the present application, a groove 32 is provided on a side of the current collector 30 away from the cooling plate 40. The groove 32 extends in a concave manner toward the cooling plate 40. At least a part of the bus bar 20 is received in the groove 32, and the second interface 31 is located in the groove 32. In this way, the groove 32 provides a receiving space for the bus bar 20, enabling the bus bar 20 to be snap-fitted in the groove 32 with better connection stability. And the second interface 31 is located in the groove 32 to connect with the first interface 21 of the bus bar 20, avoiding protruding the second interface 31 out of the current collector 30, which can reduce the size of the battery pack in the first direction X, is beneficial to the miniaturized design of the product, and improves the volume utilization rate of the whole pack.

[0046] In the embodiments of the present application, optionally, the groove 32 has a first wall 33 and a second wall 34 connected to the first wall 33. The first wall 33 intersects with the first direction X, and the second wall 34 intersects with the first wall 33; the bus bar 20 is connected to at least one of the first wall 33 and the second wall 34; the second interface 31 is provided on the first wall 33, or the second interface 31 is provided on the second wall 34. Specifically, as Figure 7 shown, the first wall 33 and the second wall 34 form two side walls of the groove 32. For example, the bus bar 20 may be connected to the first wall 33, and correspondingly, the second interface 31 is provided on the first wall 33. The second interface 31 protrudes along the first direction X, and the first interface 21 of the bus bar 20 communicates with the second interface 31 located on the first wall 33. The bus bar 20 may also be connected to the second wall 34, and correspondingly, the second interface 31 is provided on the second wall 34. The second interface 31 extends downward perpendicular to the first direction X and the second direction Y toward the bus bar 20, and the first interface 21 of the bus bar 20 communicates with the second interface 31 located on the second wall 34.

[0047] In addition, the bus bar 20 can also be connected to the first wall 33 and the second wall 34 simultaneously, so that the bus bar 20 has a larger contact area with the groove 32 of the current collector 30, improving the connection reliability. Since the bus bar 20 is connected to both the first wall 33 and the second wall 34, the second interface 31 can be arranged on the first wall 33 or the second wall 34, and the embodiments of the present application do not limit this. Thus, there are various connection methods between the bus bar 20 and the current collector 30, and various arrangement methods for the second interface 31, enriching the arrangement methods of the bus bar 20 and the current collector 30, and also facilitating the flexible arrangement of the specific connection method between the bus bar 20 and the current collector 30 and the specific arrangement method of the second interface 31 according to actual needs.

[0048] Optionally, in the embodiments of the present application, the first interface 21 protrudes and extends away from the bus bar 20, the current collector 30 is provided with a second opening 311, the second opening 311 forms the second interface 31, and the first interface 21 is inserted into the second opening 311; or, the second interface 31 protrudes and extends towards the bus bar 20, the bus bar 20 is provided with a first opening 211, the first opening 211 forms the first interface 21, and the second interface 31 is inserted into the first opening 211. In this way, by protruding and extending the first interface 21 on the bus bar 20 away from the bus bar 20 and opening a second opening 311 on the current collector 30 as the second interface 31, the connection between the bus bar 20 and the current collector 30 can be realized by inserting the protruding first interface 21 on the bus bar 20 into the second opening 311 on the current collector 30.

[0049] In addition, as Figure 7 shown, the second interface 31 on the current collector 30 can also be arranged to protrude and extend towards the side wall of the bus bar 20, a first opening 211 is opened on the bus bar 20 as the first interface 21, and the connection between the bus bar 20 and the current collector 30 is realized by inserting the protruding second interface 31 on the current collector 30 into the first opening 211 on the bus bar 20, enriching the connection methods between the first interface 21 and the second interface 31 and facilitating the relatively flexible setting of the specific connection method between the first interface 21 and the second interface 31 according to actual needs.

[0050] In the embodiments of the present application, optionally, as Figure 4 and Figure 5As shown, the cooling channels 41 are multiple and arranged at intervals along the third direction Z. The current collector 30 is provided with a connecting flow channel 303, and the connecting flow channel 303 communicates with at least two cooling channels 41. The connecting channel 303 and the groove 32 are arranged at intervals along the third direction Z, and the third direction Z intersects both the first direction X and the second direction Y. In this way, the connection between the current collector 30 and the cooling plate 40 is realized through the connecting flow channel 303, so that the cooling medium can be transmitted between the current collector 30 and the cooling plate 40 through the connecting flow channel 303 and the cooling channels 41. Exemplarily, the shape of the connecting flow channel 303 can be an arc-shaped flow channel, the number of the cooling channels 41 can be multiple, and the connecting flow channel 303 can be respectively connected to the ends of two adjacent cooling channels 41 to realize the connection between the connecting flow channel 303 and the two adjacent cooling channels 41. The specific shape and setting manner of the connecting flow channel 303 in the embodiments of the present application may not be limited.

[0051] Optionally, in the embodiments of the present application, the groove 32 penetrates the current collector 30 along the second direction Y, and the bus bar 20 is inserted into the grooves 32 of multiple current collectors 30. In this way, the groove 32 has a relatively large space, providing a relatively large connection space for the bus bar 20, and enabling the bus bar 20 to penetrate multiple current collectors 30 along the second direction Y, so that the bus bar 20 is connected to multiple current collectors 30 at the same time.

[0052] In the embodiments of the present application, optionally, the bus bar 20 includes a first side wall 35 and a second side wall 36 arranged at intervals and a third side wall 37 connected between the first side wall 35 and the second side wall 36; the first side wall 35, the second side wall 36 and the third side wall 37 enclose a cavity 38, the first side wall 35 is provided with a plurality of first interfaces 21, and the first side wall 35 is arranged close to the current collector 30. Specifically, in the embodiments of the present application, the number of the third side walls 37 can be two, one of the third side walls 37 is connected to one end of the first side wall 35 and the second side wall 36, and the other third side wall 37 is connected to the other end of the first side wall 35 and the second side wall 36, and the two third side walls 37 are perpendicular to the first side wall 35 and the second side wall 36, so as to enclose a rectangular cavity 38. In this way, a flow space for the cooling medium in the bus bar 20 is provided through the cavity 38, and the first interfaces 21 are arranged on the first side wall 35, and the plurality of first interfaces 21 communicate with the cavity 38. Since the first interfaces 21 communicate with the second interfaces 31 of the current collector, a better connection effect between the bus bar 20 and the current collector 30 is realized, so that the cooling medium transmitted from the second interfaces 31 of multiple current collectors 30 to the first interfaces 21 is converged through the cavity 38.

[0053] Specifically, in the embodiments of the present application, the number of the third side walls 37 can be two. One of the third side walls 37 is connected between one end of the first side wall 35 and one end of the second side wall 36, and the other third side wall 37 is connected between the other end of the first side wall 35 and the other end of the second side wall 36. The first side wall 35, the second side wall 36 and the third side wall 37 can enclose a cavity 38 in a quadrilateral shape, such as a rectangular structure.

[0054] Optionally, in the embodiments of the present application, the thickness of the first side wall 35 along the first direction X is the first thickness H1, and the thickness of the second side wall 36 along the first direction X is the second thickness H2; the first thickness H1 is greater than the second thickness H2. Since the first interface 21 is disposed on the first side wall 35, setting the first thickness H1 of the first side wall 35 to be greater than the second thickness H2 of the second side wall 36 can make the first side wall 35 have a larger thickness and better strength and structural stability. Furthermore, the first interface 21 disposed on the first side wall 35 has better strength and structural stability, avoiding cracks and the like in the first interface 21 that may cause the connection with the second interface 31 to fail, and reducing the risk of liquid leakage or seepage.

[0055] In the embodiments of the present application, optionally, the third side wall 37 is perpendicular to the second direction Y, and the third side wall 37 is provided with a drain port 39. The first interface 21, the cavity 38 and the drain port 39 are communicated. In this way, after the cooling medium is transmitted from the first interface 21 to the cavity 38 and converges, the cooling medium can be discharged through the drain port 39. Moreover, the converging member 20 extends along the second direction Y, and the cooling medium also transmits along the second direction Y in the cavity 38. Setting the drain port 39 on the third side wall 37 perpendicular to the second direction Y is conducive to discharging the cooling medium from the converging member 20 more smoothly.

[0056] In another alternative embodiment of the present application, as Figures 8 to 10As shown, the battery pack further has a third direction Z that intersects the first direction X and the second direction Y pairwise. There are multiple cooling channels 41, which are arranged at intervals along the third direction Z. The battery pack includes an adapter 60. The current collector 30 is connected to one end of the cooling plate 40 along the first direction X, and the adapter 60 is connected to the other end of the cooling plate 40 along the first direction X. The adapter 60 is provided with an adapter flow channel 61, and the adapter flow channel 61 communicates with at least two cooling channels 41. In this way, the communication between the cooling channels 41 in the cooling plate 40 is realized through the adapter 60. Specifically, the number of cooling channels 41 can be multiple. The adapter flow channel 61 of the adapter 60 is connected between the ends of two cooling channels 41 to realize the communication between multiple cooling channels 41. Moreover, by connecting the current collector 30 to one end of the cooling plate 40 along the first direction X, the cooling medium can flow between the cooling plate 40, the adapter 60, and the current collector 30. Exemplarily, the adapter 60 can also be integrally formed with the cooling plate 40, that is, the cooling channels 41 and the adapter flow channel 61 can be formed on the cooling plate 40 at the same time. For example, the adapter flow channel 61 can be processed on the brazed cooling plate 40 at the same time. The specific forming method of the adapter 60 and the cooling plate 40 in this application embodiment may not be limited.

[0057] Optionally, in the embodiment of the present application, the bus bar 20 is provided with an inlet flow channel and an outlet flow channel. The first interface 21 includes a first sub-interface 24 and a second sub-interface 25. The first sub-interface 24 communicates with the inlet flow channel, and the second sub-interface 25 communicates with the outlet flow channel. The second interface 31 of the current collector 30 includes an inlet port 301 and an outlet port 302 arranged at intervals. The inlet port 301 and the outlet port 302 are connected to one end of the cooling channel 41. The outlet port 302 and the inlet port 301 are respectively connected to two cooling channels 41; the first sub-interface 24 is connected to the inlet port 301, the second sub-interface 25 is connected to the outlet port 302, and the inlet port 301, the outlet port 302, the adapter flow channel 61, and the cooling channel 41 communicate to form a loop.

[0058] In the embodiment of the present application, the cooling medium enters the cooling plate 40 along the current collector 30 through the inlet port 301. The cooling medium is transmitted along the cooling channels 41 of the cooling plate 40 and circulates in the cooling plate 40 through the adapter flow channel 61 of the adapter 60. Then the cooling medium is transmitted out of the cooling plate 40 and the current collector 30 through the outlet port 302 of the current collector 30. The first sub-interface 24 of the bus bar 20 is connected to the inlet port 301 of the current collector 30, and the cooling medium can be fed into the inlet port 301 through the first sub-interface 24. The second sub-interface 25 of the bus bar 20 is connected to the outlet port 302 of the current collector 30, so that the cooling medium discharged from the outlet port 302 can be transmitted into the cavity 38 of the bus bar 20 through the second sub-interface 25, realizing the confluence of the cooling media discharged from multiple current collectors 30.

[0059] Exemplarily, in the embodiments of the application, the number of the bus bars 20 may be two. A first sub-interface 24 is provided on one of the bus bars 20, and a second sub-interface 25 is provided on the other bus bar 20. In addition, the number of the bus bars 20 may be set to one and have a larger width. A first sub-interface 24 connected to the liquid inlet 301 of the current collector and a second sub-interface 25 connected to the liquid outlet 302 of the current collector are respectively provided on the bus bar 20. The specific setting manner of the bus bar 20 in the embodiments of the application may not be limited.

[0060] In the embodiments of the application, the bus bar 20 may be provided with a liquid inlet channel and a liquid outlet channel at the same time. The first sub-interface 24 communicates with the liquid inlet channel, and a cooling medium is input into the first sub-interface 24 through the liquid inlet channel. The second sub-interface 25 communicates with the liquid outlet channel, so that the cooling medium after absorbing heat and cooling is transmitted out from the second sub-interface 25 along the liquid outlet channel.

[0061] In the embodiments of the application, exemplarily, the first sub-interface 24 and the second sub-interface 25 are arranged at intervals. The number of the first sub-interfaces 24 may be multiple, and the multiple first sub-interfaces 24 are arranged at intervals along the second direction Y. Similarly, the number of the second sub-interfaces 25 may also be multiple, and the multiple second sub-interfaces 25 are arranged at intervals along the second direction Y. The specific setting number and setting manner of the first sub-interface 24 and the second sub-interface 25 in the embodiments of the application may not be limited.

[0062] In the embodiments of the application, optionally, the battery pack further includes a seal 70. The seal 70 is connected between the first interface 21 and the second interface 31 to seal the first interface 21 and the second interface 31. In this way, the connection between the first interface 21 and the second interface 31 is sealed by the seal 70, improving the sealing and waterproof performance of the battery pack and avoiding situations such as liquid leakage or seepage. Exemplarily, the seal 70 may be a sealing ring or a gasket, and the material of the seal 70 may be rubber or silica gel, etc. The specific type and specific material of the seal 70 in the embodiments of the application may not be limited.

[0063] Optionally, in the embodiments of the application, the battery pack further includes an adhesive 80. The adhesive 80 is connected between the bus bar 20 and the current collector 30 to bond the bus bar 20 to the current collector 30. In this way, the bus bar 20 is more firmly bonded to the current collector 30 through the adhesive 80, further improving the connection stability and reliability between the bus bar 20 and the current collector 30 and avoiding the situation that the bus bar 20 is easily detached or displaced, resulting in unstable connection. Exemplarily, the adhesive 80 may be a double-sided adhesive or a structural adhesive, etc. The specific type of the adhesive 80 in the embodiments of the application may not be limited.

[0064] In an embodiment of the present application, optionally, the battery pack includes a plurality of battery cells 50. The battery cell 50 has a third wall 51 and a fourth wall 52 connected to the third wall 51, and the third wall 51 is the wall with the largest surface area of the battery cell 50. The cooling plate 40 is connected to the third wall 51, or the cooling plate 40 is connected to the fourth wall 52. Connecting the cooling plate 40 to the third wall 51 with the largest surface area of the battery cell 50 can result in a larger contact area between the cooling plate 40 and the battery cell 50, thus having a larger heat exchange area, further improving the heat exchange efficiency and having a better cooling and heat dissipation effect on the battery cell 50. In addition, the cooling plate 40 can also be attached to the second wall 34 with a smaller surface area of the battery cell 50, enriching the setting manner of the cooling plate 40. The specific setting manner of the cooling plate 40 in the embodiment of the present application may not be limited.

[0065] In an embodiment of the present application, by way of example, the number of battery cells 50 can be multiple, and the multiple battery cells 50 can be arranged in an array. The battery cell 50 can be a lithium-ion battery cell, a polymer lithium battery cell, a lithium iron phosphate battery cell, etc. The specific type of the battery cell 50 in the embodiment of the present application may also not be limited.

[0066] In summary, the battery pack described in the embodiment of the present application can at least have the following advantages:

[0067] In the embodiment of the present application, the battery pack has an intersecting first direction and second direction, and the battery pack includes: a busbar, a plurality of current collectors, and a plurality of cooling plates; the cooling plates extend along the first direction, and the plurality of cooling plates are arranged at intervals along the second direction; the cooling plates are provided with cooling channels, the current collectors are connected to at least one end of the cooling plates along the first direction, the current collectors are provided with current collecting cavities, and the current collecting cavities are communicated with the cooling channels; the busbar extends along the second direction, the busbar is provided with a plurality of first interfaces arranged along the second direction, the current collectors are provided with second interfaces, and the first interfaces are communicated with the second interfaces to realize the communication between the busbar and the plurality of current collectors. Specifically, the plurality of cooling plates are arranged at intervals along the second direction, and the current collectors are connected to at least one end of the cooling plates along the first direction, that is, the plurality of current collectors are arranged at intervals along the second direction. The busbar extends along the second direction to connect the plurality of current collectors arranged at intervals along the second direction, and the communication between the first interface of the busbar and the second interface of the current collector is realized to achieve the communication between the current collecting cavities of the busbar and the plurality of current collectors. Moreover, the current collecting cavities of the current collectors are communicated with the cooling channels of the cooling plates to realize the circulation of the cooling medium among the cooling plates, the current collectors, and the busbar. In this way, the connection between two adjacent current collectors is realized through the busbar. Only by opening a second interface on the current collector to communicate with the first interface of the busbar, there is no need to provide at least two connection ports on the current collector to realize the connection between the quick-insert water pipe and two adjacent current collectors, reducing the number of connection ports in the battery pack, reducing the risk of liquid leakage easily caused by connection failure, and the busbar can be connected to a plurality of current collectors at the same time, without connecting a plurality of quick-insert water pipes to two adjacent current collectors respectively, simplifying the installation process and also reducing the production cost.

[0068] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, the battery pack having a first direction (X) and a second direction (Y) intersecting each other, characterized in that: The battery pack comprises: a current collector (20), a plurality of current collectors (30), and a plurality of cooling plates (40); The cooling plate (40) extends along the first direction (X), and the plurality of cooling plates (40) are arranged at intervals along the second direction (Y); The cooling plate (40) is provided with a cooling channel (41), the current collector (30) is connected to at least one end of the cooling plate (40) along the first direction (X), the current collector (30) is provided with a collecting cavity (305), and the collecting cavity (305) is in communication with the cooling channel (41); The current collector (20) extends along the second direction (Y), the current collector (20) is provided with a plurality of first interfaces (21) arranged along the second direction (Y), the current collector (30) is provided with a second interface (31), and the first interface (21) is in communication with the second interface (31).

2. The battery pack according to claim 1, characterized in that: A groove (32) is provided on a side of the current collector (30) away from the cooling plate (40), the groove (32) is recessed and extends toward the cooling plate (40), the current collector (20) is at least partially accommodated in the groove (32), and the second interface (31) is located in the groove (32).

3. The battery pack according to claim 2, characterized in that: The groove (32) has a first wall (33) and a second wall (34) connected to the first wall (33), the first wall (33) intersects with the first direction (X), and the second wall (34) intersects with the first wall (33); The current collector (20) is connected to at least one of the first wall (33) and the second wall (34); The second interface (31) is arranged on the first wall (33), or the second interface (31) is arranged on the second wall (34).

4. The battery pack according to claim 2, characterized in that: The first interface (21) protrudes and extends in a direction away from the current collector (20); the current collector (30) is provided with a second opening (311); the second opening (311) forms the second interface (31); and the first interface (21) is plugged into the second opening (311); Alternatively, the second interface (31) protrudes and extends in a direction close to the current collector (20), the current collector (20) is provided with a first opening (211), the first opening (211) forms the first interface (21), and the second interface (31) is plugged into the first opening (211).

5. The battery pack according to claim 2, characterized in that: The cooling channels (41) are provided in plurality and are arranged at intervals along a third direction (Z); the current collector (30) is provided with a connecting flow channel (303); the connecting flow channel (303) is connected to at least two of the cooling channels (41); and the connecting flow channel (303) and the groove (32) are arranged at intervals along the third direction (Z); the third direction (Z) intersects with both the first direction (X) and the second direction (Y).

6. The battery pack according to claim 2, characterized in that: The groove (32) penetrates the current collector (30) along the second direction (Y), and the current collector (20) is arranged in the grooves (32) of a plurality of the current collectors (30).

7. The battery pack according to claim 1, characterized in that: The current collector (20) comprises a first side wall (35) and a second side wall (36) which are spaced apart from each other, and a third side wall (37) connected between the first side wall (35) and the second side wall (36); The first side wall (35), the second side wall (36) and the third side wall (37) enclose a cavity (38); the first side wall (35) is provided with a plurality of the first interfaces (21); and the first side wall (35) is arranged close to the current collector (30).

8. The battery pack according to claim 7, characterized in that: The thickness of the first side wall (35) along the first direction (X) is a first thickness H1, and the thickness of the second side wall (36) along the first direction (X) is a second thickness H2; The first thickness H1 is greater than the second thickness H2.

9. The battery pack according to claim 7, characterized in that: The third side wall (37) intersects with the second direction (Y), and the third side wall (37) is provided with a liquid discharge port (39); the first interface (21), the cavity (38) and the liquid discharge port (39) are in communication.

10. The battery pack according to claim 1, characterized in that: The battery pack also has a third direction (Z) intersecting the first direction (X) and the second direction (Y) in pairs. The cooling channels (41) have a plurality of channels and are arranged at intervals along the third direction (Z). The battery pack also includes a switching component (60). The current collector (30) is connected to one end of the cooling plate (40) along the first direction (X). The switching component (60) is connected to the other end of the cooling plate (40) along the first direction (X). The switching component (60) is provided with a switching flow channel (61), and the switching flow channel (61) is connected to at least two cooling channels (41).

11. The battery pack according to claim 10, characterized in that: The flow collector (20) is provided with a liquid inlet channel and a liquid outlet channel, the first interface (21) comprises a first sub-interface (24) and a second sub-interface (25), the first sub-interface (24) is connected to the liquid inlet channel, the second sub-interface (25) is connected to the liquid outlet channel, the second interface (31) of the collector (30) comprises a liquid inlet (301) and a liquid outlet (302) arranged at intervals, the liquid inlet (301) and the liquid outlet (302) are connected to one end of the cooling channel (41), and the liquid outlet (302) and the liquid inlet (301) are respectively connected to the two cooling channels (41); The first sub-interface (24) is connected to the liquid inlet (301), the second sub-interface (25) is connected to the liquid outlet (302), and the liquid inlet (301), the liquid outlet (302), the switching channel (61) and the cooling channel (41) are connected to form a loop.

12. The battery pack according to claim 1, characterized in that: The battery pack further comprises a sealing member (70), wherein the sealing member (70) is connected between the first interface (21) and the second interface (31) to seal the first interface (21) and the second interface (31).

13. The battery pack according to claim 1, characterized in that: The battery pack further comprises an adhesive member (80), wherein the adhesive member (80) is connected between the current collector (20) and the current collector (30) so as to bond the current collector (20) to the current collector (30).

14. The battery pack according to claim 1, characterized in that: The battery pack comprises a plurality of battery cells (50), wherein the battery cells (50) have a third wall (51) and a fourth wall (52) connected to the third wall (51), and the third wall (51) is the wall with the largest surface area of ​​the battery cells (50); The cooling plate (40) is connected to the third wall (51), or the cooling plate (40) is connected to the fourth wall (52).

Images