Battery pack

Abstract

The embodiment of the utility model provides a battery pack which comprises a box body, a cross beam, a shell and a bracket, and the battery pack has a first direction S1, a second direction S2 and a third direction S3 which are intersected pairwise; the shell comprises a bottom plate and a side plate surrounding the circumferential direction of the bottom plate, the bottom plate and the side plate define a containing cavity, the maximum size of the shell in the first direction S1 is L1 mm, the maximum size of the shell in the second direction S2 is L2 mm, the maximum size of the shell in the third direction S3 is L3 mm, and L1 < L2 and L1 < L3 are met; the cross beam extends in the second direction S2 and is connected to the box body; the support comprises a first connecting part and a second connecting part, the first connecting part is connected with the side, away from the containing cavity, of the bottom plate, and the second connecting part extends away from the containing cavity in the first direction S1 and is assembled with the cross beam. The space of the box body in the first direction S1 can be reasonably utilized, and the size of the battery pack can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] As the core component of new energy vehicles, the battery pack is currently the focus of the battery pack structural design, how to place and install the various components in the battery pack box and how to reasonably utilize the internal space of the battery pack. At present, the battery management system is the design focus of the battery pack. The existing battery management system is usually fixed laterally on the crossbeam of the battery pack, which has a large requirement for the lateral size of the battery pack box. Utility Model Content

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a battery pack that overcomes the above problems or at least partially solves the above problems.

[0004] In order to solve the above problems, the present utility model discloses a battery pack, comprising: a box, a beam, a shell and a bracket, wherein the beam, the shell and the bracket are all arranged in the box; the battery pack has a first direction S that intersects with each other. 1 , the second direction S 2 and third party to S 3 ;in,

[0005] The housing comprises a bottom plate and side plates surrounding the bottom plate in a circumferential direction. The bottom plate and the side plates are combined to form a receiving cavity. The housing is arranged along the first direction S 1 The maximum size is L 1 mm, along the second direction S 2 The maximum size is L 2 mm, along the third direction S 3 The maximum size is L 3 mm, satisfying L 1 <L 2 , and L 1 <L 3 ;

[0006] The beam is along the second direction S 2 Extending and connected to the box;

[0007] The bracket includes a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the second connecting portion, the first connecting portion is connected to a side of the bottom plate away from the accommodating cavity, and the second connecting portion is connected along the first direction S 1 The housing extends away from the accommodating cavity and is assembled with the crossbeam.

[0008] Optionally, a first limiting member is provided on the bottom plate, and a second limiting member is provided on the first connecting portion;

[0009] The first limiting member and the second limiting member are limitedly matched along the extension direction of the first connecting portion, and the first connecting portion is extended along the third direction S 3 extend.

[0010] Optionally, one of the first limiting member and the second limiting member is a first limiting protrusion, and the other is a limiting groove or a limiting hole, and the first limiting protrusion is inserted into the limiting groove or the limiting hole.

[0011] Optionally, the battery pack further comprises a fastener, and the second connecting portion is provided with at least one mounting hole;

[0012] The fastener is passed through the mounting hole and is used to be fastened to the crossbeam, so that the second connecting portion is assembled with the crossbeam through the fastener.

[0013] Optionally, the second connecting portion is provided with a weight-reducing structure, and the weight-reducing structure is arranged along the second direction S 2 The weight-reducing structure penetrates the second connection portion, and is spaced apart from the mounting hole.

[0014] Optionally, the battery pack further includes a circuit board, the circuit board is disposed in the accommodating cavity, and the shell further includes a protruding structure;

[0015] The protruding structure is disposed in the accommodating cavity, and the protruding structure extends along the first direction S 1 The protruding structure is arranged between the circuit board and the bottom plate, and abuts against the circuit board.

[0016] Optionally, the battery pack further comprises a thermal pad;

[0017] The thermal pad is along the first direction S 1 The circuit board is disposed between the circuit board and the protruding structure, and is perpendicular to the first direction S 1 On the plane, the projection of the thermal pad falls within the projection of the circuit board.

[0018] Optionally, the circuit board comprises a first connection section for arranging a first heating device and a second connection section for arranging a second heating device, and the first heating device generates more heat than the second heating device;

[0019] The thermal pad is along the first direction S 1 The orthographic projection covers the first connecting segment along the first direction S 1 The thermal pad is projected along the first direction S 1 The orthographic projection of the second connecting segment along the first direction S 1 The orthographic projections are spaced apart.

[0020] Optionally, the battery pack further comprises an insulating sheet, and the circuit board is provided with a plurality of pins;

[0021] The insulating sheet is along the second direction S 2 The insulating sheet is disposed on one side of the thermal pad and extends along the first direction S 1 The pin is arranged between the pin and the bottom plate.

[0022] Optionally, at least one second limiting protrusion is provided on the side plate;

[0023] The second limiting protrusion extends along the side plate toward the accommodating cavity, and is used to 2 The circuit board is limited on the upper side.

[0024] Optionally, the battery pack further comprises a protective cover, and the protective cover is arranged outside the shell;

[0025] The side plate is provided with a first buckling piece, and the protective cover is provided with a second buckling piece at a position opposite to the first buckling piece, and the second buckling piece is buckled and connected with the first buckling piece.

[0026] Optionally, the first fastening member is a third limiting protrusion, and the second fastening member is a through hole;

[0027] Alternatively, the first fastening member is a through hole, and the second fastening member is a third limiting protrusion.

[0028] Optionally, the housing and the beam are arranged along the first direction S 1 arranged in a direction perpendicular to the first direction S 1 On the plane, the projection of the shell and the projection of the beam at least partially overlap.

[0029] The utility model embodiment includes the following advantages:

[0030] In the embodiment of the utility model, the beam is arranged along the first direction S 1 The first connecting portion of the bracket is connected to the side of the bottom plate away from the accommodating cavity, and the second connecting portion of the bracket is connected along the first direction S 1 The second connecting portion extends away from the bottom plate, and the second connecting portion is assembled with the cross beam, so that the housing can be fixed on the cross beam through the bracket. In this way, the side of the bottom plate away from the accommodating cavity can be assembled with the cross beam, and the housing can be reasonably utilized in the first direction S. 1 The space on the battery pack can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an exploded diagram of a battery management system of the utility model;

[0032] Figure 2 It is an exploded cross-sectional view of a battery management system of the utility model;

[0033] Figure 3 This is a structural schematic diagram of a battery management system of the utility model;

[0034] Figure 4 It is a side view of a battery management system of the utility model;

[0035] Figure 5 It is a side view of another battery management system of the utility model;

[0036] Figure 6 This is a schematic diagram of the bottom structure of a battery management system of the utility model;

[0037] Figure 7 It is a structural schematic diagram of a battery pack of the utility model;

[0038] Figure 8 It is a structural schematic diagram of another battery pack of the present utility model.

[0039] Description of reference numerals:

[0040] 100-box, 1-protective cover, 11-first buckling piece, 2-shell, 21-protrusion structure, 22-first limiting piece, 23-second buckling piece, 24-second limiting protrusion, 25-bottom plate, 26-side plate, 261-opening, 27-accommodating cavity, 28-avoidance space, 3-circuit board, 31-first connecting section, 32-second connecting section, 4-bracket, 41-first connecting part, 411-second limiting piece, 42-second connecting part, 421-mounting hole, 422-weight reduction structure, 5-thermal pad, 6-insulating sheet, 7-crossbeam, 8-fastener, 91-first heating device, 92-second heating device. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0043] In the description of the present invention, 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", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The term "parallel" in this application includes not only the absolute parallel situation, but also the roughly parallel situation conventionally recognized in engineering, such as "parallel" refers to 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 roughly vertical situation conventionally recognized in engineering, such as "vertical" refers to 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 roughly 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%.

[0046] One of the core concepts of the embodiment of the utility model is to disclose a battery pack, which may include: a box 100, a crossbeam 7, a shell 2 and a bracket 4, wherein the crossbeam 7, the shell 2 and the bracket 4 are all arranged in the box 100; the battery pack has a first direction S intersecting each other. 1 , the second direction S 2 and third party to S 3 The housing 2 may include a bottom plate 25 and a side plate 26 surrounding the bottom plate 25, the bottom plate 25 and the side plate 26 forming a receiving cavity 27, and the housing 2 along the first direction S 1 The maximum size is L 1 mm, along the second direction S 2 The maximum size is L 2mm, along the third direction S 3 The maximum size is L 3 mm, satisfying L 1 <L 2 , and L 1 <L 3 ; Beam 7 along the second direction S 2 The bracket 4 may include a first connecting portion 41 and a second connecting portion 42, the first connecting portion 41 and the second connecting portion 42 are connected, the first connecting portion 41 is connected to the side of the bottom plate 25 away from the accommodating cavity 27, and the second connecting portion 42 is connected along the first direction S 1 Extending away from the base plate 25 , the second connection section 42 is assembled with the cross member 7 .

[0047] In the embodiment of the present utility model, the cross beam 7 is arranged along the first direction S 1 The first connection portion 41 of the bracket 4 is connected to the side of the bottom plate 25 away from the accommodating cavity 27, and the second connection portion 42 of the bracket 4 is connected to the side of the bottom plate 25 away from the accommodating cavity 27. 1 The second connecting portion 42 is assembled with the cross beam 7 so that the housing 2 can be mounted on the cross beam 7 through the bracket 4. Figure 7 and Figure 8 As shown, the side of the bottom plate 25 away from the accommodating cavity 27 can be assembled with the crossbeam 7, and the box body 100 can be reasonably utilized in the first direction S 1 The space above can reduce the size of the battery pack.

[0048] Furthermore, by using the bracket 4 to mount the bottom of the housing 2 and the crossbeam 7, it is possible to avoid the bracket 4 and the crossbeam 7 occupying the horizontal plane of the box 100, that is, the second direction S 2 and the third party to S 3 The space on the surface makes the size of the box body 100 in the horizontal plane more sufficient, which can increase the laying area of ​​the bottom plate 25 on the horizontal plane and improve the heat dissipation area.

[0049] In the embodiment of the utility model, the battery pack is a three-dimensional structure having a first direction S intersecting each other. 1 , the second direction S 2 and third party to S 3 , the utility model embodiment only in the first direction S 1 , the second direction and the third direction S 3 Take two pairs of perpendicularity as an example to illustrate the distance. Figure 1 As shown, the first direction S 1 It can be the height direction S of the battery pack 1 , the second direction S 2 The width direction S of the battery pack can be 2 , the third party to S3 It can be the length direction S of the battery pack 3 .

[0050] Specifically, the battery pack includes a box body 100, a crossbeam 7 and a battery management system. The crossbeam 7 and the battery management system are both arranged in the box body 100. Battery cells can be arranged in the box body 100; the crossbeam 7 can be connected to the box body 100; the battery management system can include a shell 2 and a bracket 4, and the bracket 4 can be connected to the crossbeam 7 and the shell 2 respectively, so that the bracket 4 can be used to fix the battery management system and the crossbeam 7, thereby realizing the installation of the battery management system in the box body 100.

[0051] Specifically, the shell 2 may include a base plate 25 and a side plate 26 surrounding the base plate 25, so that an open accommodating cavity 27 can be formed in the shell 2, and the control module, display module, wireless communication module, electrical equipment, battery pack, acquisition module and other devices in the battery management system can be arranged in the accommodating cavity 27.

[0052] Specifically, the shell 2 may be made of aluminum or plastic. Selecting aluminum can also improve the anti-static effect and heat dissipation effect of the shell 2 .

[0053] Specifically, the bracket 4 may include a first connection portion 41 and a second connection portion 42. The first connection portion 41 may be connected to a side of the bottom plate 25 away from the accommodating cavity 27, so as to achieve installation and fixation between the bracket 4 and the housing 2. The crossbeam 7 may be arranged along the first direction S 1 The second connecting portion 42 is disposed on a side of the bottom plate 25 away from the accommodating cavity 27 and extends along the first direction S 1 Extending away from the bottom plate 25 and assembled with the cross beam 7 , the bracket 4 and the cross beam 7 can be installed and fixed.

[0054] Specifically, the first connection portion 41 and the second connection portion 42 may be spliced ​​together, or the first connection portion 41 and the second connection portion 42 may be integrally formed, so as to improve the structural stability of the bracket 4 .

[0055] Specifically, the first connecting portion 41 can serve to connect the bracket 4 and the shell 2. The first connecting portion 41 can be fixedly connected to the side of the bottom plate 25 away from the accommodating cavity 27 by laser welding. The second connecting portion 42 can serve to connect the crossbeam 7. In this way, the shell 2 and the crossbeam 7 can be installed and fixed through the bracket 4.

[0056] Specifically, the first connection portion 41 may be arranged along the third direction S 3 The second connection portion 42 may extend along the first direction S 1 The first connection portion 41 and the second connection portion 42 may intersect, so that the bracket 4 may be an L-shaped structure. Figure 4As shown, the embodiment of the utility model only takes the example that the first connection part 41 and the second connection part 42 are perpendicular to each other as an example, and other situations can be set by reference, and the embodiment of the utility model does not make specific limitations on this.

[0057] Specifically, the housing 2 is arranged along the first direction S 1 The maximum size is L 1 mm, along the second direction S 2 The maximum size is L 2 mm, along the third direction S 3 The maximum size is L 3 mm, satisfying L 1 <L 2 , and L 1 <L 3 So that the housing 2 in the second direction S 2 and the third party to S 3 The size of the housing 2 is larger, that is, the housing 2 occupies a larger space on the horizontal plane. 1 That is, the space occupied in the height direction is smaller.

[0058] Furthermore, the cross beam 7 is disposed on a side of the bottom plate 25 away from the accommodating cavity 27, the first connecting portion 41 is connected to the side of the bottom plate 25 away from the accommodating cavity 27, and the second connecting portion 42 is connected along the first direction S 1 The housing 2 extends away from the bottom plate 25. Thus, the cross beam 7 and the bracket 4 can be located on the side of the bottom plate 25 away from the accommodating cavity. 1 The space occupied by the cross beam 7 and the bracket 4 is small, so that the box 100 can be reasonably used in the first direction S 1 The space on the top of the battery pack is used to avoid increasing the size of the box body 100 and reduce the occupied space of the battery pack.

[0059] Alternatively, if Figure 6 As shown, the bottom plate 25 may be provided with a first stopper 22, and the first connecting portion 41 may be provided with a second stopper 411; the first stopper 22 and the second stopper 411 are limitedly matched along the extension direction of the first connecting portion 41, and the first connecting portion 41 is extended along the third direction S 3 extend.

[0060] In the embodiment of the utility model, under the cooperation of the first limiting member 22 and the second limiting member 411, the 3 It plays a role in positioning the first connecting portion 41, thereby improving the reliability and stability of the assembly between the bracket 4 and the shell 2.

[0061] Specifically, the first position-limiting member 22 can be spliced ​​with the bottom plate 25 , or the first position-limiting member 22 can also be integrally formed with the bottom plate 25 to improve the structural stability of the housing 2 .

[0062] Specifically, the second position-limiting member 411 can be spliced ​​with the first connection portion 41 , or the second position-limiting member 411 can be integrally formed with the first connection portion 41 to improve the structural stability of the bracket 4 .

[0063] Specifically, the number and shape of the first limiting member 22 and the second limiting member 411 can be adapted, such as Figure 6 As shown in FIG. 1 , a situation where two first stoppers 22 and two second stoppers 411 cooperate with each other is illustrated. In addition, the two first stoppers 22 are arranged along the second direction S 2 The two first stoppers 22 are arranged in a staggered manner in the second direction S 2 There is a spacing h on the top, which improves the reliability of positioning the first connecting portion 41.

[0064] Optionally, one of the first limiting member 22 and the second limiting member 411 is a first limiting protrusion, and the other is a limiting groove or a limiting hole; the first limiting protrusion is inserted into the limiting groove or the limiting hole.

[0065] In the embodiment of the utility model, the first limiting protrusion cooperates with the limiting groove, or the first limiting protrusion cooperates with the limiting hole, which can improve the reliability of the limiting connection between the first limiting member 22 and the second limiting member 411.

[0066] Specifically, the first limiting member 22 may be a first limiting protrusion, and the corresponding second limiting member 411 may be a limiting groove or a limiting hole; or, the first limiting member 22 may be a limiting groove or a limiting hole, and the corresponding second limiting member 411 may be a first limiting protrusion.

[0067] Optionally, the battery pack also includes a fastener 8, and the second connecting portion 42 is provided with at least one mounting hole 421; the fastener 8 is passed through the mounting hole 421 and is used to be fastened to the crossbeam 7, so that the second connecting portion 42 is assembled with the crossbeam 7 through the fastener 8, which can improve the convenience of installing and fixing the bracket 4 and the crossbeam 7.

[0068] Specifically, the fastener 8 may include a bolt, a nut, a screw, or the like.

[0069] Alternatively, if Figure 5 As shown, the second connection portion 42 is provided with a weight-reducing structure 422, and the weight-reducing structure 422 is arranged along the second direction S 2 The weight-reducing structure 422 runs through the second connection portion 42 and is spaced apart from the mounting hole 421 , so that the bracket 4 can be weight-reduced, thereby achieving lightweighting of the battery pack.

[0070] Optionally, the weight-reducing structure 422 may be a notch or a through hole.

[0071] In some other optional embodiments of the present invention, the battery pack further includes a circuit board 3, the circuit board 3 is disposed in the accommodating cavity 27, and the housing 2 further includes a protruding structure 21; the protruding structure 21 is disposed in the accommodating cavity 27, and the protruding structure 21 is disposed in the first direction S 1 The protruding structure 21 is disposed between the circuit board 3 and the bottom plate 25 and is close to the circuit board 3 , so that the protruding structure 21 is used to support the circuit board 3 .

[0072] In the embodiment of the utility model, the protruding structure 21 is disposed between the circuit board 3 and the bottom plate 25, so that the housing 2 is 1 The thickness is equal to the sum of the thickness of the protruding structure 21 and the bottom plate 25, so that the local area of ​​the shell 2 can be thickened. Moreover, the protruding structure 21 abuts against the circuit board 3, which can also shorten the distance between the shell 2 and the circuit board 3.

[0073] Optionally, the protruding structure 21 is perpendicular to the first direction S 1 The orthographic projection on the plane falls on the circuit board 3 in a direction perpendicular to the first direction S 1 The raised structure 21 is within the orthographic projection on the plane, and the raised structure 21 abuts against part of the circuit board 3. The area of ​​the raised structure 21 in the horizontal plane can be smaller than the area of ​​the circuit board 3 in the horizontal plane. In this way, the area on the bottom plate 25 where the raised structure 21 is not provided can be enclosed with the circuit board 3 to form an avoidance space 28, which is convenient for arranging components with higher heights on the circuit board 3, avoiding squeezing and damaging the components on the circuit board 3, and thereby reducing the failure rate of the circuit board 3.

[0074] Specifically, the protruding structure 21 can be integrally formed with the bottom plate 25 , or the protruding structure 21 can also be spliced ​​with the bottom plate 25 , and the protruding structure 21 and the bottom plate 25 are made of the same material.

[0075] Optionally, the battery pack further includes a thermal pad 5, which is disposed in the accommodating cavity 27; the thermal pad 5 is disposed along the first direction S 1 The thermal pad 5 is disposed between the circuit board 3 and the protruding structure 21 and is used to conduct heat from the circuit board 3. 1 On the plane, the projection of the thermal pad 5 can fall within the projection of the circuit board 3.

[0076] In the embodiment of the utility model, the thermal pad 5 can conduct the heat on the circuit board 3 to improve the heat dissipation effect of the circuit board 3. 1 On the plane, the projection of the thermal pad 5 falls within the projection of the circuit board 3. In this way, the thermal pad 5 can be arranged only in the main heating area of ​​the circuit board 3, which can improve the utilization rate of the thermal pad 5 and reduce the cost of the thermal pad 5.

[0077] Specifically, the raised structure 21 can be made only in the main heat-generating area of ​​the circuit board 3 to shorten the distance between the shell 2 and the circuit board 3, so as to achieve the purpose of thinning the thickness of the thermal pad 5, thereby reducing the amount of the thermal pad 5 used, saving costs, and reducing the weight of the battery pack.

[0078] Specifically, a fixing member can be used to penetrate the circuit board 3 and fix the circuit board 3 to the bottom plate 25. The fixing member can be a standard part such as a bolt or a screw, that is, it meets the installation requirements of the standard part. The distance between the circuit board 3 and the bottom plate 25 is constant, and the protrusion structure 21 is appropriately increased in the first direction S 1 The thickness of the thermal pad 5 can be reduced.

[0079] Specifically, the thermal pad 5 can be disposed between the protruding structure 21 and the circuit board 3 . The thermal pad 5 is laid on the protruding structure 21 . The protruding structure 21 can support the thermal pad 5 , and the circuit board 3 can be supported by the thermal pad 5 .

[0080] Specifically, the protruding structure 21 can be adapted to the shape of the thermal pad 5, so that the thermal pad 5 is laid on the protruding structure 21, and the protruding structure 21 supports the thermal pad 5. Specifically, the shape and size of the protruding structure 21 can be adapted to the thermal pad 5.

[0081] Optionally, the circuit board 3 may include a first connecting section 31 for arranging a first heating device 91 and a second connecting section 32 for arranging a second heating device 92. The first heating device 91 generates more heat than the second heating device 92. The thermal pad 5 is disposed along the first direction S 1 The orthographic projection covers the first connecting section 31 along the first direction S 1 The orthographic projection of the thermal pad 5 along the first direction S1 is spaced from the orthographic projection of the second connecting section 32 along the first direction S1.

[0082] In the embodiment of the utility model, since the thermal pad 5 is along the first direction S 1 The orthographic projection covers the first connecting section 31 along the first direction S 1 The first connecting section 31 is used to arrange the first heating device 91, so that the thermal pad 5 can be set only corresponding to the first heating device 91. Since the heat generated by the first heating device 91 is greater than that of the second heating device 92, the thermal pad 5 can only conduct heat to the main heating devices on the circuit board 3, which can improve the utilization rate of the thermal pad 5, reduce the weight of the battery pack, and reduce the cost.

[0083] Specifically, the area of ​​the protruding structure 21 and the area of ​​the thermal pad 5 can be close to the area of ​​the first connecting section 31, and the shape of the protruding structure 21 and the shape of the thermal pad 5 can be close to the shape of the first connecting section 31. In this way, the thermal pad 5 and the protruding structure 21 can be arranged only below the main heating area of ​​the circuit board 3, which can improve the utilization rate of the thermal pad 5, reduce the material of the thermal pad 5, and reduce the manufacturing cost. Figure 2 As shown, the protruding structure 21 can raise the circuit board 3, and the area of ​​the bottom plate 25 where the protruding structure 21 is not set can form an avoidance space 28 with the second connecting section 32 of the circuit board 3. The avoidance space 28 can be used to arrange the second heating device 92, which can meet the higher size requirements of the second heating device 92. In this way, the pressure on the second heating device 92 can also be reduced, avoiding damage to the second heating device 92, thereby reducing the failure rate of the circuit board 3.

[0084] Optionally, the battery pack further includes an insulating sheet 6, and a plurality of pins are provided on the circuit board 3; the insulating sheet 6 is provided in the accommodating cavity 27, and the insulating sheet 6 is provided along the second direction S 2 The insulating sheet 6 is disposed on one side of the thermal pad 5 along the first direction S 1 It is disposed between the pins and the bottom plate 25 .

[0085] In the embodiment of the present utility model, since the insulating sheet 6 is arranged along the second direction S 2 The insulating sheet 6 is arranged on one side of the thermal pad 5, so that the insulating sheet 6 can be laid at a position where the thermal pad 5 is not arranged, and because the insulating sheet 6 is arranged along the first direction S 1 It is arranged between the pin and the base plate 25 to avoid electrical connection between the pin and the base plate 25, thereby preventing the pin from being short-circuited.

[0086] Alternatively, if Figure 3 As shown, at least one second limiting protrusion 24 may be provided on the side plate 26; the second limiting protrusion 24 may extend along the side plate 26 toward the accommodating cavity 27, and is used to 2 The circuit board 3 is positioned and limited on the upper side to prevent the circuit board 3 from moving along the second direction S 2 Shaking occurs.

[0087] In the embodiment of the utility model, the second limiting protrusion 24 can protrude from the side plate 26. When the circuit board 3 is installed, the second limiting protrusion 24 can be moved from the second direction S 2 It plays a role of limiting guide, which can improve the convenience of installing the circuit board 3.

[0088] Specifically, the second limiting protrusion 24 can be spliced ​​with the side plate 26, or the second limiting protrusion 24 can be integrally formed with the side plate 26 to improve the structural stability of the shell 2.

[0089] Specifically, the number of the second limiting protrusions 24 may include one or at least two. As shown in the figure, only two are illustrated. Other situations can refer to the settings, and the embodiment of the utility model does not make specific limitations on this.

[0090] Specifically, combined Figure 1 and Figure 3 As shown, an opening 261 is provided on one side of the housing 2, and the circuit board 3 can be installed into the accommodating cavity 27 through the opening 261. The side wall of the circuit board 3 can abut against the second limiting protrusion 24, which can prevent the circuit board 3 from moving along the second direction S 2 The shaking can facilitate the positioning of the circuit board 3 and the alignment of the mounting holes 421 , and the circuit board 3 and the base plate 25 can be fixed using the fasteners 8 .

[0091] Optionally, in some other optional embodiments of the utility model, the battery pack also includes a protective cover 1, which is arranged outside the shell 2; a first fastening member 11 is arranged on the side panel 26, and a second fastening member 23 is arranged at a position opposite to the protective cover 1 and the first fastening member 11, and the second fastening member 23 is fastened and connected with the first fastening member 11.

[0092] In the embodiment of the utility model, the second fastening member 23 is fastened to the first fastening member 11 to achieve the connection between the protective cover 1 and the housing 2 , so that the protective cover 1 can protect the components in the accommodating cavity 27 .

[0093] Optionally, the first fastening component 11 may be a third limiting protrusion, and the second fastening component 23 may be a through hole; or, the first fastening component 11 is a through hole, and the second fastening component 23 is a third limiting protrusion.

[0094] In the embodiment of the utility model, the first buckling member 11 and the second buckling member 23 can be buckled together by the cooperation between the third limiting protrusion and the through hole, and the implementation method is relatively simple and the structure is simple.

[0095] Optionally, the housing 2 and the beam 7 are arranged along the first direction S 1 Arranged in a direction perpendicular to the first direction S 1 On the plane, the projection of the housing 2 and the projection of the beam 7 at least partially overlap, which can effectively ensure that the housing 2 and the beam 7 are aligned along the first direction S 1 Arrangement, can reasonably utilize the box 100 in the first direction S 1 The spatial layout on.

[0096] The battery pack described in the embodiment of the utility model has at least the following advantages:

[0097] In the embodiment of the present utility model, the cross beam 7 is arranged along the first direction S 1The first connection portion 41 of the bracket 4 is connected to the side of the bottom plate 25 away from the accommodating cavity 27, and the second connection portion 42 of the bracket 4 is connected to the side of the bottom plate 25 away from the accommodating cavity 27. 1 The second connecting portion 42 extends away from the bottom plate 25, and the second connecting portion 42 is assembled with the cross beam 7, so that the housing 2 can be fixed on the cross beam 7 through the bracket 4. In this way, the side of the bottom plate 25 away from the accommodating cavity 27 can be assembled with the cross beam 7, and the box body 100 can be reasonably utilized in the first direction S 1 The space on the battery pack can be reduced.

[0098] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0099] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0100] A battery pack provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, characterized in that: include: A box body (100), a crossbeam (7), a shell (2) and a bracket (4), wherein the crossbeam (7), the shell (2) and the bracket (4) are all arranged in the box body (100); the battery pack has a first direction (S1), a second direction (S2) and a third direction (S3) intersecting in pairs; wherein: The shell (2) comprises a bottom plate (25) and a side plate (26) enclosing the bottom plate (25) in a circumferential direction, the bottom plate (25) and the side plate (26) enclosing a receiving cavity (27), the maximum dimension of the shell (2) along the first direction (S1) is L1 mm, the maximum dimension along the second direction (S2) is L2 mm, and the maximum dimension along the third direction (S3) is L3 mm, satisfying L1<L2, and L1<L3; The crossbeam (7) extends along the second direction (S2) and is connected to the box (100); The bracket (4) comprises a first connecting portion (41) and a second connecting portion (42), wherein the first connecting portion (41) and the second connecting portion (42) are connected to each other, the first connecting portion (41) is connected to a side of the bottom plate (25) away from the accommodating cavity (27), and the second connecting portion (42) extends away from the accommodating cavity (27) along the first direction (S1) and is assembled with the crossbeam (7).

2. The battery pack according to claim 1, characterized in that: A first limiting member (22) is provided on the bottom plate (25), and a second limiting member (411) is provided on the first connecting portion (41); The first limiting member (22) and the second limiting member (411) are matched to limit positions along the extension direction of the first connecting portion (41), and the first connecting portion (41) extends along the third direction (S3).

3. The battery pack according to claim 2, characterized in that: One of the first limiting member (22) and the second limiting member (411) is a first limiting protrusion, and the other is a limiting groove or a limiting hole, and the first limiting protrusion is inserted into the limiting groove or the limiting hole.

4. The battery pack according to claim 1, characterized in that: The battery pack further comprises a fastener (8), and the second connecting portion (42) is provided with at least one mounting hole (421); The fastener (8) is inserted into the mounting hole (421) and is used to be fastened to the crossbeam (7), so that the second connecting portion (42) is assembled with the crossbeam (7) through the fastener (8).

5. The battery pack according to claim 4, characterized in that: The second connection portion (42) is provided with a weight reduction structure (422), the weight reduction structure (422) penetrates the second connection portion (42) along the second direction (S2), and the weight reduction structure (422) is spaced apart from the mounting hole (421).

6. The battery pack according to claim 1, characterized in that: The battery pack further comprises a circuit board (3), wherein the circuit board (3) is arranged in the accommodating cavity (27), and the housing (2) further comprises a protruding structure (21); The protruding structure (21) is arranged in the accommodating cavity (27); the protruding structure (21) is arranged between the circuit board (3) and the bottom plate (25) along the first direction (S1); and the protruding structure (21) abuts against the circuit board (3).

7. The battery pack according to claim 6, characterized in that: The battery pack also includes a thermal pad (5); The thermal pad (5) is arranged between the circuit board (3) and the protruding structure (21) along the first direction (S1), and on a plane perpendicular to the first direction (S1), the projection of the thermal pad (5) falls within the projection of the circuit board (3).

8. The battery pack according to claim 7, characterized in that: The circuit board (3) comprises a first connecting section (31) for arranging a first heating device (91) and a second connecting section (32) for arranging a second heating device (92), wherein the first heating device (91) generates more heat than the second heating device (92); The orthographic projection of the thermal pad (5) along the first direction (S1) covers the orthographic projection of the first connecting section (31) along the first direction (S1), and the orthographic projection of the thermal pad (5) along the first direction (S1) is spaced from the orthographic projection of the second connecting section (32) along the first direction (S1).

9. The battery pack according to claim 7, characterized in that: The battery pack further comprises an insulating sheet (6), and the circuit board (3) is provided with a plurality of pins; The insulating sheet (6) is arranged in the accommodating cavity (27), the insulating sheet (6) is arranged on one side of the thermal pad (5) along the second direction (S2), and the insulating sheet (6) is arranged between the pin and the bottom plate (25) along the first direction (S1).

10. The battery pack according to claim 6, characterized in that: At least one second limiting protrusion (24) is provided on the side plate (26); The second limiting protrusion (24) extends along the side plate (26) toward the accommodating cavity (27) and is used to limit the circuit board (3) in the second direction (S2).

11. The battery pack according to claim 1, characterized in that: The battery pack further comprises a protective cover (1), wherein the protective cover (1) is arranged outside the shell (2); A first fastening member (11) is provided on the side plate (26), a second fastening member (23) is provided at a position of the protective cover (1) opposite to the first fastening member (11), and the second fastening member (23) is fastened and connected to the first fastening member (11).

12. The battery pack according to claim 11, characterized in that: The first fastening member (11) is a third limiting protrusion, and the second fastening member (23) is a through hole; Alternatively, the first fastening member (11) is a through hole, and the second fastening member (23) is a third limiting protrusion.

13. The battery pack according to claim 1, characterized in that: The shell (2) and the crossbeam (7) are arranged along the first direction (S1), and on a plane perpendicular to the first direction (S1), a projection of the shell (2) and a projection of the crossbeam (7) at least partially overlap.

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