Battery pack and electric equipment

Abstract

The embodiment of the utility model discloses a battery pack and electric equipment. Wherein the battery pack has a first direction, and the battery pack comprises a box body and at least one group of battery components; the box body is provided with an accommodating cavity; the battery assemblies are accommodated in the accommodating cavities, each group of battery assemblies comprises a plurality of battery monomers which are arranged along a first direction, each battery monomer is provided with two large surfaces which are arranged oppositely and two side surfaces which are arranged oppositely, the area of the large surfaces is larger than that of the side surfaces, and the large surfaces and the side surfaces are alternately arranged in the circumferential direction of the battery monomers and are connected; the side faces are obliquely arranged relative to the large faces, and in every two adjacent battery monomers, one side face of one battery monomer and one large face of the other battery monomer are oppositely arranged and connected. According to the embodiment of the invention, the surface area of the single battery in contact with the outside is increased, so that the heat exchange capacity of the single battery and the outside is improved.

Description

Technical Field

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

[0002] CTP (Cell to PACK, module-free technology) is the direct integration of battery cells into battery packs, thus eliminating the intermediate module link. Among the four side walls of the square battery cell, two side walls set back to back have larger areas, and the other two side walls set back to back have smaller areas.

[0003] At present, in a battery pack using CTP, multiple battery cells are stacked, and two adjacent battery cells are arranged facing each other through a side wall with a larger area and connected to each other, resulting in a pair of larger side walls of the battery cell being blocked. The battery cell can only contact the liquid cooling plate through a pair of smaller side walls, which is not conducive to heat exchange between the battery cell and the outside world. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery pack and an electrical device to improve the ability of heat exchange between battery cells and the outside world.

[0005] The embodiments of the present application disclose the following technical solutions:

[0006] On the one hand, a battery pack is provided, the battery pack has a first direction, and the battery pack includes a box body and at least one group of battery assemblies. The box body has a receiving cavity; the battery assembly is received in the receiving cavity, and each group of battery assemblies includes a plurality of battery cells arranged along the first direction, the battery cell has two large faces arranged opposite to each other and two side faces arranged opposite to each other, the area of ​​the large faces is larger than the area of ​​the side faces, the large faces and the side faces are alternately arranged and connected in the circumferential direction of the battery cell, the side faces are arranged obliquely relative to the large faces, and in two adjacent battery cells, the side faces of one battery cell are arranged opposite to and connected to the large face of the other battery cell.

[0007] In addition to or as an alternative to one or more features disclosed above, the inclination directions of the side surfaces relative to the large surface of two adjacent battery cells are opposite, so that a large surface of one battery cell is parallel to a side surface of another battery cell.

[0008] In addition to or as an alternative to one or more of the features disclosed above, a large surface of one battery cell is flush with a side surface of another battery cell.

[0009] In addition to or instead of one or more of the features disclosed above, the battery pack has a second direction, the first direction intersects the second direction, the battery pack also includes a heat conductor, the heat conductor is arranged on at least one side of the battery assembly along the second direction, the heat conductor includes a plurality of heat conductive plates, the plurality of heat conductive plates are arranged along the first direction, and two adjacent heat conductive plates are inclined; wherein, two adjacent battery cells are respectively a first battery cell and a second battery cell, and two adjacent heat conductive plates are respectively a first heat conductive plate and a second heat conductive plate, the first heat conductive plate is arranged to face and be connected to a large surface of the first battery cell, the second heat conductive plate is arranged to face and be connected to a side surface of the first battery cell, and the second heat conductive plate is arranged to face and be connected to a large surface of the second battery cell.

[0010] In addition to or as an alternative to one or more features disclosed above, two adjacent heat conducting plates have a first angle, and the large surface and the side surface respectively connected to the two adjacent heat conducting plates in the same battery cell have a second angle, and the first angle is greater than or equal to the second angle.

[0011] In addition to or as an alternative to one or more of the features disclosed above, there are multiple battery assemblies, the multiple battery assemblies are arranged at intervals along the second direction, and the heat conductive member is sandwiched between two adjacent battery assemblies.

[0012] In addition to or as an alternative to one or more of the features disclosed above, there are multiple heat conducting members, and heat conducting members are disposed on both sides of the battery assembly along the second direction.

[0013] In addition to one or more of the features disclosed above, or as an alternative, the battery pack also includes a connector, which is connected between two adjacent heat-conducting members, the connector extends along a predetermined direction, and is inclined relative to the heat-conducting plate connected thereto, and a second flow channel is provided inside the connector; wherein a first flow channel is provided inside the heat-conducting member, and the second flow channel is respectively connected to the first flow channels of the two adjacent heat-conducting members.

[0014] In addition to or as an alternative to one or more of the features disclosed above, the connecting member is disposed facing and connected to a side surface of a battery cell.

[0015] In addition to one or more features disclosed above, or as an alternative, the same side surface in the battery cell has a second angle β1 and a third angle β2 with the two large surfaces respectively, satisfying the following relationship: π / 6≤β1<π / 2, β1+β2=π.

[0016] In addition to or as an alternative to one or more of the features disclosed above, the ratio of the area of ​​the large face to the area of ​​the side face is greater than 1 and less than or equal to 10.

[0017] In addition to or as an alternative to one or more of the features disclosed above, the battery pack further includes a heat insulating member, which is sandwiched between two adjacent battery cells.

[0018] On the other hand, an electrical device is also provided, the electrical device comprising any of the above-mentioned battery packs.

[0019] One of the above technical solutions has the following advantages or beneficial effects:

[0020] In this technical solution, the area of ​​the large surface is larger than the area of ​​the side surface, and two adjacent battery cells are arranged facing each other and connected to each other through the large surface and the side surface, and the rest of the large surface can still contact the outside world. Thus, the surface area of ​​the battery cell that can contact the outside world is increased, thereby improving the ability of the battery cell to exchange heat with the outside world. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack of the present application;

[0023] Figure 2 is a schematic structural diagram of a battery assembly in an embodiment of a battery pack of the present application;

[0024] Figure 3 is a schematic diagram of the structure of a battery cell in an embodiment of a battery pack of the present application;

[0025] Figure 4 This is a schematic diagram of the structure of three consecutive battery cells in an embodiment of a battery pack of the present application;

[0026] Figure 5 is a schematic structural diagram of three consecutive battery cells in another embodiment of the battery pack of the present application;

[0027] Figure 6 is a schematic structural diagram of three consecutive battery cells in another embodiment of the battery pack of the present application;

[0028] Figure 7 It is a schematic structural diagram of heat-conducting members disposed on both sides of a battery assembly in an embodiment of a battery pack of the present application;

[0029] Figure 8 is a schematic structural diagram of a heat conducting member in an embodiment of a battery pack of the present application;

[0030] Fig. 9 It is a schematic diagram of the structure of a connector limiting the position of a battery cell located at an end of a battery assembly in an embodiment of a battery pack of the present application;

[0031] Fig.10 It is a schematic structural diagram of the connection between two adjacent battery cells 100 in an embodiment of the battery pack of the present application.

[0032] Explanation of the reference numerals in the figure: 400 - box; 401 - accommodating chamber; 403 - bottom plate; 405 - frame; 407 - top plate; 300 - battery assembly; 200 - heat conducting member; 201 - heat conducting plate; 203 - first flow channel; 100 - battery cell; 100a - first battery cell; 100b - second battery cell; 100c - third battery cell; 101 - large surface; 103 - side surface; 105 - large surface; 107 - side surface; 109 - top surface; 111 - pole; 500 - connecting member; 501 - second flow channel; 600 - adhesive; 700 - thermal insulation member; X - first direction; Y - second direction. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and beneficial effects of this application more clear, the following further describes this application in detail in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining this application, not for limiting this application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] The term "parallel" in this application includes not only the absolute parallel situation, but also the generally parallel situation conventionally recognized in engineering, such as the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°; at the same time, "vertical" also includes not only the absolute vertical situation, but also the generally vertical situation conventionally recognized in engineering, such as the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only the absolute equal situation, but also the generally equal situation conventionally recognized in engineering, that is, there may be a certain error, such as the state where the tolerance range is -1% to 1%.

[0038] See also Figure 1 , Figure 2 , Figure 3 . Figure 1 It is a structural schematic diagram of an embodiment of a battery pack of the present application. Figure 2 It is a schematic diagram of the structure of the battery assembly in one embodiment of the battery pack of the present application. Figure 3 It is a schematic diagram of the structure of a battery cell in an embodiment of the battery pack of the present application. Figure 1 Part of the box was cut away to reveal its internal structure.

[0039] For the convenience of introduction, the following definition is made: the battery pack has an intersecting first direction X and a second direction Y. Specifically, the first direction X and the second direction Y are perpendicular. In the scenario where the battery pack is installed on a vehicle, the first direction X is parallel to the length direction (forward direction) of the vehicle, and the second direction Y is parallel to the width direction of the vehicle.

[0040] In some embodiments, the battery pack includes a box body 400, an adhesive 600 (see Figure 4) and at least one group of battery assemblies 300. The box body 400 has a receiving cavity 401. The battery assembly 300 is accommodated in the receiving cavity 401. Each group of battery assemblies 300 includes a plurality of battery cells 100 arranged along a first direction X. The battery cell 100 has two large faces 101, 105 disposed opposite to each other and two side faces 103, 107 disposed opposite to each other. The area of ​​the large faces 101, 105 is greater than the area of ​​the side faces 103, 107. The large faces 101, 105 and the side faces 103, 107 are alternately arranged and connected in the circumferential direction of the battery cell 100. The side faces 103, 107 are arranged obliquely relative to the large faces 101, 105. Among two adjacent battery cells 100, one side face 103, 107 of one battery cell 100 is arranged opposite to and connected to a large face 101, 105 of the other battery cell 100. Among them, the inclined setting can be that the angle between the planes where the two are located is not 90° or 180°; the connection between a side surface 103, 107 of the battery cell 100 and a large surface 101, 105 of another adjacent battery cell 100 can be connected by adhesive 600, or by a thermal insulation pad, insulating sheet, etc., which is not limited here.

[0041] In some embodiments, the box 400 includes a bottom plate 403, a frame 405, and a top plate 407. The bottom plate 403 and the top are spaced apart, and the frame 405 is sandwiched between the top plate 407 and the bottom plate 403 and is arranged around the bottom plate 403. The bottom plate 403, the frame 405, and the top plate 407 are arranged to form a receiving cavity 401. The shape of the box 400 is not limited thereto.

[0042] In some embodiments, Figure 1 As shown, there are multiple battery assemblies 300, and the multiple battery assemblies 300 are arranged at intervals along the second direction Y.

[0043] In some embodiments, the battery cells 100 in the battery assembly 300 have the same specifications. In other embodiments, the battery cells 100 in the battery assembly 300 have different specifications. This will be described in detail below.

[0044] In some embodiments, the battery cell 100 in the battery assembly 300 is carried on the bottom plate 403 of the box body 400 and fixedly connected to the bottom plate 403 by adhesive 600. In other embodiments, the battery cell 100 may also be directly in contact with and connected to the bottom plate 403.

[0045] In some embodiments, the battery cell 100 has a length direction, a thickness direction, and a height direction that are perpendicular to each other. The battery cell 100 has a top surface 109 and a bottom surface ( Figure 3Not visible). The two poles 111 of the battery cell 100 are respectively arranged on the top surface 109. The large surfaces 101, 105 and the side surfaces 103, 107 are respectively connected between the top surface 109 and the bottom surface. The two large surfaces 101, 105 are arranged opposite to each other in the thickness direction, and the two large surfaces 101, 105 are parallel. The two large surfaces 101, 105 have the same area. The two side surfaces 103, 107 are arranged opposite to each other in the length direction, and the two side surfaces 103, 107 are parallel. The two side surfaces 103, 107 have the same area. In this article, "opposite to each other" means that the two surfaces are arranged back to back. "Facing" means that the two surfaces are arranged face to face. The battery cell 100 is supported on the bottom plate 403 through the bottom surface.

[0046] The side surfaces 103, 107 are tilted relative to the large surfaces 101, 105, but do not include a solution in which the side surfaces 103, 107 are perpendicular to the large surfaces 101, 105. The battery cell 100 in the embodiment of the present application is not a common square battery on the market. In the common square battery on the market, the side surfaces 103, 107 are perpendicular to the large surfaces 101, 105.

[0047] Several implementations of “among two adjacent battery cells 100 , a side surface 103 , 107 of one battery cell 100 is disposed opposite to and connected to a large surface 101 , 105 of the other battery cell 100 ” are described in detail below.

[0048] See also Figure 4 , Figure 5 as well as Figure 6 . Figure 4 , Figure 5 as well as Figure 6 The schematic diagrams are respectively schematic diagrams of the structures of three consecutive battery cells in the same battery assembly in three different embodiments of the battery pack of the present application. In the figure, the gap between two adjacent battery cells is enlarged to distinguish the boundary between the two adjacent battery cells.

[0049] When the number of battery cells in the battery assembly is not less than 3, some battery cells have adjacent battery cells on both sides of the first direction. Figures 4 to 6 Three battery cells are shown in a row.

[0050] For the convenience of description, three battery cells 100 arranged consecutively in the first direction X in the battery assembly 300 are respectively named as a first battery cell 100 a , a second battery cell 100 b , and a third battery cell 100 c .

[0051] Figure 4 In the illustrated embodiment, the side surface 107 of the second battery cell 100b faces the large surface 105 of the first battery cell 100a and is connected via adhesive 600. The large surface 101 of the second battery cell 100b faces the side surface 107 of the third battery cell 100c and is connected via adhesive 600.

[0052] That is to say, each battery cell 100 is connected to two adjacent battery cells 100 via a side surface 107 and a large surface 101 .

[0053] The specifications of the first battery cell 100 a and the third battery cell 100 c are the same, and the specifications of the second battery cell 100 b are different from those of the first battery cell 100 a .

[0054] Specifically, the second angle β1 between the side surface 103 and the large surface 101 in the second battery cell 100b is complementary to the second angle β1 between the side surface 103 and the large surface 101 in the first battery cell 100a, so that the large surface 101 in the second battery cell 100b is parallel to the side surface 103 in the first battery cell 100a. Since the first battery cell 100a and the third battery cell 100c have the same specifications, similarly, the second angle β1 between the side surface 103 and the large surface 101 in the second battery cell 100b and the second angle β1 between the side surface 103 and the large surface 101 in the third battery cell 100c are complementary to each other, so that the side surface 103 in the second battery cell 100b is parallel to the large surface 105 in the third battery cell 100c.

[0055] Furthermore, the large surface 101 of the second battery cell 100b is flush with the side surface 103 of the first battery cell 100a, and the side surface 103 of the second battery cell 100b is flush with the large surface 105 of the third battery cell 100c. "Flush" means coplanar.

[0056] Figure 5 In the illustrated embodiment, the side surface 107 of the second battery cell 100b faces the large surface 105 of the first battery cell 100a and is connected via adhesive 600. The side surface 103 of the second battery cell 100b faces the large surface 101 of the third battery cell 100c and is connected via adhesive 600.

[0057] That is, a portion of the battery cells 100 are connected to two adjacent battery cells 100 via the side surfaces 103 , 107 , respectively, and another portion of the battery cells 100 are connected to two adjacent battery cells 100 via the large surfaces 101 , 105 , respectively.

[0058] The first battery cell 100 a , the second battery cell 100 b , and the third battery cell 100 c have the same specifications.

[0059] Figure 6 In the illustrated embodiment, the side surface 107 of the second battery cell 100b faces the large surface 105 of the first battery cell 100a and is connected via adhesive 600. The side surface 103 of the second battery cell 100b faces the large surface 101 of the third battery cell 100c and is connected via adhesive 600.

[0060] That is, a portion of the battery cells 100 are connected to two adjacent battery cells 100 via the side surfaces 103 , 107 , respectively, and another portion of the battery cells 100 are connected to two adjacent battery cells 100 via the large surfaces 101 , 105 , respectively.

[0061] The specifications of the first battery cell 100 a and the third battery cell 100 c are the same, and the specifications of the second battery cell 100 b are different from those of the first battery cell 100 a .

[0062] Specifically, the second angle β1 between the side surface 103 and the large surface 101 in the second battery cell 100b is complementary to the second angle β1 between the side surface 103 and the large surface 101 in the first battery cell 100a, so that the large surface 101 in the second battery cell 100b is parallel to the side surface 103 in the first battery cell 100a. Since the first battery cell 100a and the third battery cell 100c have the same specifications, similarly, the second angle β1 between the side surface 103 and the large surface 101 in the second battery cell 100b and the second angle β1 between the side surface 103 and the large surface 101 in the third battery cell 100c are complementary, so that the large surface 105 in the second battery cell 100b is parallel to the side surface 107 in the third battery cell 100c.

[0063] Furthermore, the large surface 101 of the second battery cell 100 b is flush with the side surface 103 of the first battery cell 100 a , and the large surface 105 of the second battery cell 100 b is flush with the side surface 107 of the third battery cell 100 c .

[0064] Three arrangements of the battery cells 100 in the battery assembly 300 are provided above, but the present application is not limited thereto, and the three arrangements may also be combined with each other.

[0065] In the embodiment of the present application, the area of ​​the large surface 101, 105 is larger than the area of ​​the side surface 103, 107, and two adjacent battery cells 100 are arranged opposite to each other and connected to each other through the large surface 101, 105 and the side surface 103, 107, and the rest of the large surface 101, 105 can still contact with the outside world. Thus, the surface area of ​​the battery cell 100 that can contact with the outside world is increased, thereby improving the ability of the battery cell 100 to exchange heat with the outside world.

[0066] As mentioned above Figure 4 and Figure 6As shown, in some embodiments, the side surfaces 103, 107 of two adjacent battery cells 100 are inclined in opposite directions relative to the large surfaces 101, 105, so that a large surface 101, 105 of one battery cell 100 can be parallel to a side surface 103, 107 of another adjacent battery cell 100. On this basis, a large surface 101, 105 of one battery cell 100 can also be flush with a side surface 103, 107 of another adjacent battery cell 100.

[0067] See also Figure 7 and Figure 8 . Figure 7 It is a structural schematic diagram of heat-conducting members disposed on both sides of the battery assembly in one embodiment of the battery pack of the present application. Figure 8 It is a schematic diagram of the structure of the heat conducting component in one embodiment of the battery pack of the present application.

[0068] In some embodiments, the battery pack further includes a heat conductive member 200. The heat conductive member 200 is disposed on at least one side of the battery assembly 300 along the second direction Y. The heat conductive member 200 includes a plurality of heat conductive plates 201. The plurality of heat conductive plates 201 are arranged along the first direction X. Two adjacent heat conductive plates 201 are arranged at an angle. Among them, the two adjacent battery cells 100 are respectively the first battery cell 100a and the second battery cell 100b, and the two adjacent heat conductive plates 201 are respectively the first heat conductive plate 201a and the second heat conductive plate 201b. The first heat conductive plate 201a is disposed opposite to a large surface 101 of the first battery cell 100a and is connected by adhesive 600( Figure 7 The second heat conducting plate 201b is disposed opposite to one side surface 103 of the first battery cell 100a and connected by adhesive 600 ( Figure 7 The second heat conducting plate 201b is disposed opposite to a large surface 101 of the second battery cell 100b and is connected by adhesive 600 ( Figure 7 (not shown) connection.

[0069] Specifically, Figure 7 In the illustrated embodiment, heat conducting members 200 are disposed on both sides of the battery assembly 300 in the second direction Y.

[0070] Each heat conducting plate 201 is generally in the shape of a flat plate and is a good conductor of heat. The heat conducting plate 201 can transfer the heat of the battery cell 100 to reduce the temperature of the battery cell 100. The heat conducting plate 201 can also transfer heat to the battery cell 100 to increase the temperature of the battery cell 100. The heat conducting member 200 can be manufactured in one piece, for example, by bending a flat plate, which can greatly simplify the manufacturing process of the heat conducting member 200 and reduce the manufacturing cost.

[0071] A plurality of heat conducting plates 201 are connected in sequence, so that the heat conducting member 200 is generally in a zigzag shape. The heat conducting member 200 is in a zigzag shape, which matches the outer contour shape of the battery cell 100 and can limit the position of the battery cell 100. Specifically, the battery cell 100 is limited by the box body 400 in the vertical direction, and the freedom in each direction in the horizontal plane is limited by the heat conducting member 200. As a result, the firmness of the fixation of the battery cell 100 is improved, the movement of the battery cell 100 relative to the heat conducting member 200 is avoided, and the damage caused by the mutual squeezing between the battery cells 100 is reduced.

[0072] See also Figure 1 The following describes the assembly process of the battery pack with the heat conducting member 200 .

[0073] In one embodiment, the assembly process of the battery pack includes the following steps: applying adhesive 600 on both side surfaces of the heat conductive member 200 along the second direction Y, and fixing the heat conductive member 200 in the box 400. Applying adhesive 600 on the side surfaces 103 and 107 of the battery cell 100, placing the battery cell 100 against the side of the heat conductive member 200 coated with adhesive 600, arranging multiple battery cells 100 in sequence along the first direction X to form a battery assembly 300, and connecting two adjacent battery cells 100 through the adhesive 600 on the side surfaces 103 and 107. Applying adhesive 600 on both side surfaces of another heat conductive member 200 along the second direction Y, and fixing another heat conductive member 200 in the box 400, so that the two heat conductive members 200 clamp the battery assembly 300 along the second direction Y.

[0074] See also Figure 7 In some embodiments, two adjacent heat conducting plates 201 have a first angle α, and the large surface 101 and the side surface 103 of the same battery cell 100 respectively connected to the two adjacent heat conducting plates 201 have a second angle β1, and the first angle α is greater than or equal to the second angle β1.

[0075] Furthermore, in some embodiments, the ratio of the arc of the first angle α to the arc of the second angle β1 is greater than or equal to 1 and less than or equal to 1.1. When the ratio is within the above range, the thermal conductive member 200 and the battery cell 100 can be well bonded, and the internal space utilization of the battery pack can be improved, and the stability of the battery cell 100 can be improved.

[0076] In some detection scenarios, the first angle α and the second angle β1 can be detected by an angle ruler.

[0077] Furthermore, in some embodiments, the first angle and the second angle are equal. In this embodiment, the corner formed by the large surface 101 and the side surface 103 of the battery cell 100 can be completely attached to the heat conductive member 200 (without considering the process fillet), and there is no gap between the two, thereby further improving the internal space utilization of the battery pack and improving the stability of the battery cell 100.

[0078] See also Figure 1 In some embodiments, there are multiple battery assemblies 300 , and the multiple battery assemblies 300 are arranged at intervals along the second direction Y, and the heat conductive member 200 is sandwiched between two adjacent battery assemblies 300 .

[0079] See also Figure 1 In some embodiments, there are multiple heat conducting members 200 , and heat conducting members 200 are disposed on both sides of the battery assembly 300 along the second direction Y.

[0080] See also Fig. 9 . Fig. 9 It is a schematic structural diagram of a connector 500 limiting a battery cell 100 located at an end of a battery assembly 300 in an embodiment of a battery pack of the present application.

[0081] In some embodiments, the battery pack further includes a connector 500. The connector 500 is connected between two adjacent heat-conducting members 200, extends in a predetermined direction, and is tilted relative to the heat-conducting plate 201 connected thereto. A second flow channel 501 is provided inside the connector 500. The heat-conducting member 200 is provided with a first flow channel 203, and the second flow channel 501 is connected to the first flow channels 203 of the two adjacent heat-conducting members 200, respectively.

[0082] The first flow channel 203 in the heat-conducting member 200 is used to circulate a heat-conducting fluid, such as a coolant or hot water. Two adjacent heat-conducting members 200 are connected by the connecting member 500, so that the heat-conducting fluid can flow in different heat-conducting members 200, thereby reducing the interface between each heat-conducting member 200 and the pipeline supplying the heat-conducting fluid.

[0083] In some embodiments, the connector 500 is disposed opposite to one side surface 103 , 107 of a battery cell 100 and connected via an adhesive 600 (not shown).

[0084] The connecting member 500 abuts against the side surfaces 103 , 107 of the battery cell 100 at the end, so that the battery cell 100 at the end can be prevented from falling out of two adjacent heat conducting members 200 .

[0085] In addition to limiting the battery cell 100 at the end by the connector 500, the heat conductive member 200 can also be bent at the end of the first direction X to form a bent portion. The side surfaces 103 and 107 of the battery cell 100 at the end are attached to and abut against the bent portion. In this way, the battery cell 100 at the end is limited by the bent portion, so that the battery cell 100 at the end can be prevented from falling out of two adjacent heat conductive members 200.

[0086] In other embodiments, a limiting member (such as a bolt) may be further provided at the end of the heat conducting member 200 , so that the limiting member abuts against the side surfaces 103 , 107 of the battery cell 100 at the end.

[0087] The limiting method for the battery cell 100 located at the end is not limited to the above example.

[0088] See also Figure 3 In some embodiments, the same side surface 103 of the battery cell 100 has a second angle β1 and a third angle β2 with the two large surfaces 101 and 105, respectively, satisfying the following relationship: π / 6≤β1<π / 2, β1+β2=π. It can be understood that the second angle β1 and the third angle β2 are expressed in radians.

[0089] In some embodiments, the ratio of the area of ​​the large surface 101 , 105 to the area of ​​the side surface 103 , 107 is greater than 1 and less than or equal to 10.

[0090] The smaller the ratio, the larger the contact area between two adjacent battery cells 100, the smaller the thermal resistance, and the smaller the heat exchange area between the battery cell 100 and the heat conductive member 200, the lower the thermal safety of the battery pack, but the volume utilization of the battery pack is higher. The larger the ratio, the larger the thermal resistance between two adjacent battery cells 100, the larger the heat exchange area with the heat conductive member 200, the higher the thermal safety, but the volume utilization of the battery pack is lower.

[0091] In some detection scenarios, a vernier caliper may be used to detect the length, width, and height of the battery cell 100 and then calculate the area of ​​the large surface 101 , 105 and the area of ​​the side surface 103 , 107 .

[0092] See also Fig.10 . Fig.10 It is a schematic structural diagram of the connection between two adjacent battery cells 100 in an embodiment of the battery pack of the present application.

[0093] In some embodiments, the battery pack further includes a heat insulating member 700, and the heat insulating member 700 is sandwiched between two adjacent battery cells 100. In this embodiment, the adhesive 600 can be applied to the outside of the heat insulating member 700, and then the heat insulating member 700 coated with the adhesive 600 is sandwiched between two adjacent battery cells 100, so that the two adjacent battery cells 100 are respectively bonded to the heat insulating member 700. Specifically, the two adjacent battery cells 100 are respectively the first battery cell 100a and the second battery cell 100b. The large surface 105 of the first battery cell 100a is connected to one side of the heat insulating member 700 by an adhesive 600, and the side surface 107 of the second battery cell 100b is connected to the other side of the heat insulating member 700 by another adhesive 600.

[0094] By providing the heat insulating member 700 , the heat between two adjacent battery cells 100 is blocked, and the heat transfer between the adjacent battery cells 100 is prevented, thereby improving the safety of the battery assembly 300 .

[0095] In other embodiments, the adhesive 600 having good thermal insulation performance may also be selected.

[0096] The embodiment of the present application also provides an electric device, such as an electric vehicle. The electric device includes a battery pack of any of the above embodiments. Since the electric device includes all the technical features of the battery pack, it also has all the technical effects of the battery pack, which will not be described in detail here.

[0097] In summary, the battery pack and electrical equipment of the present application improve the ability of the battery cells to exchange heat with the outside world.

[0098] The introduction provided in the above steps is only used to help understand the method, structure and core idea of ​​the present application. For ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction, and the battery pack includes: A box body, wherein the box body has a containing cavity; as well as At least one group of battery components, the battery components are accommodated in the accommodating cavity, the battery components include a plurality of battery cells arranged along the first direction, the battery cells have two large faces arranged opposite to each other and two side faces arranged opposite to each other, the area of ​​the large faces is larger than the area of ​​the side faces, the large faces and the side faces are alternately arranged and connected in the circumferential direction of the battery cells, the side faces are inclined relative to the large faces, and of two adjacent battery cells, the side faces of one of the battery cells are arranged opposite to and connected to the large face of the other battery cell.

2. The battery pack according to claim 1, characterized in that: The side surfaces of two adjacent battery cells are inclined in opposite directions relative to the large surface, so that one large surface of one of the battery cells is parallel to one side surface of the other battery cell.

3. The battery pack according to claim 2, characterized in that: One of the large surfaces of the one battery cell is flush with one of the side surfaces of the other battery cell.

4. The battery pack according to claim 1, characterized in that: The battery pack has a second direction, the first direction intersects the second direction, and the battery pack further includes: A heat conducting member, the heat conducting member is arranged on at least one side of the battery assembly along the second direction, the heat conducting member comprises a plurality of heat conducting plates, the plurality of heat conducting plates are arranged along the first direction, and two adjacent heat conducting plates are arranged obliquely; Among them, the two adjacent battery cells are respectively the first battery cell and the second battery cell, and the two adjacent heat conducting plates are respectively the first heat conducting plate and the second heat conducting plate, the first heat conducting plate is arranged to face and be connected to a large surface of the first battery cell, the second heat conducting plate is arranged to face and be connected to one of the side surfaces of the first battery cell, and the second heat conducting plate is arranged to face and be connected to one of the large surfaces of the second battery cell.

5. The battery pack according to claim 4, characterized in that: Two adjacent heat conducting plates have a first angle, and the large surface and the side surface in the same battery cell respectively connected to the two adjacent heat conducting plates have a second angle, and the first angle is greater than or equal to the second angle.

6. The battery pack according to claim 4, characterized in that: There are multiple battery assemblies, and the multiple battery assemblies are arranged at intervals along the second direction. The heat conductive member is sandwiched between two adjacent battery assemblies.

7. The battery pack according to claim 4, characterized in that: There are multiple heat-conducting members, and the heat-conducting members are arranged on both sides of the battery assembly along the second direction.

8. The battery pack according to claim 7, characterized in that: The battery pack further comprises: A connecting member, the connecting member is connected between two adjacent heat-conducting members, the connecting member extends along a predetermined direction, and is arranged obliquely relative to the heat-conducting plate connected thereto, and a second flow channel is arranged inside the connecting member; Wherein, a first flow channel is provided in the heat conducting member, and the second flow channel is respectively connected to the first flow channels of two adjacent heat conducting members.

9. The battery pack according to claim 8, characterized in that: The connecting member is disposed facing and connected to one side surface of a battery cell.

10. The battery pack according to claim 1, characterized in that: The same side surface in the battery cell has a second angle β1 and a third angle β2 with the two large surfaces respectively, satisfying the following relationship: π / 6≤β1<π / 2, β1+β2=π.

11. The battery pack according to claim 1, characterized in that: The ratio of the area of ​​the large surface to the area of ​​the side surface is greater than 1 and less than or equal to 10.

12. An electrical equipment, characterized in that: A battery pack comprising any one of claims 1 to 11.

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