Battery pack

Abstract

The utility model discloses a battery pack which comprises a connecting piece and at least two battery boxes, the battery boxes are provided with a first direction, the battery boxes are stacked along the first direction, two adjacent battery boxes are connected through the connecting piece, each battery box comprises an outer side face parallel to the first direction, and the outer side face is provided with a first side face and a second side face parallel to the first direction. And the connecting piece is inserted from the outer side surface of one battery box and is connected with the other adjacent battery box. The two adjacent battery boxes are convenient to disassemble and assemble, so that the light weight of the battery pack is facilitated, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack. BACKGROUND

[0002] With the development of new energy automobile industry, more stringent requirements are put forward for the vehicle endurance mileage.

[0003] The endurance mileage of the battery pack can be improved by stacking multiple battery boxes, but the connection structure between adjacent battery boxes in the prior art is still relatively complicated, which affects the production efficiency and the lightweight of the battery pack, and is not convenient for assembly and disassembly and maintenance. UTILITY MODEL CONTENTS

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a battery pack, which is convenient to disassemble and assemble adjacent two battery boxes, and is conducive to the lightweight of the battery pack and the improvement of production efficiency.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A battery pack comprises a connecting piece and at least two battery boxes, the battery boxes have a first direction, each battery box is arranged in a stacked manner along the first direction, and adjacent two battery boxes are connected through the connecting piece, the battery box comprises an outer side surface parallel to the first direction, and the connecting piece is inserted into and connected to the other adjacent battery box from the outer side surface of one of the battery boxes.

[0007] In an embodiment, the adjacent two battery boxes are a first battery box and a second battery box, the end surface of the first battery box facing the second battery box is provided with an extension protruding along the first direction, at least part of the extension is inserted into the second battery box, and the connecting piece is inserted into and connected to the extension and the second battery box.

[0008] In an embodiment, the insertion direction of the connecting piece is perpendicular to the first direction.

[0009] In an embodiment, the second battery box is provided with a receiving groove at a position corresponding to the extension, and the extension of the first battery box is received in the receiving groove of the second battery box.

[0010] In an embodiment, the end surface of the first battery box facing the second battery box is provided with the extension, each extension is sequentially connected end to end to form a ring platform, the second battery box is provided with the receiving groove corresponding to each extension, and each receiving groove is sequentially connected end to end to form a ring groove.

[0011] In an embodiment, one end of each of the battery boxes is provided with an extension protruding in the first direction, and the other end is provided with a receiving groove capable of cooperating with the extension; the extension of one battery box is received in the receiving groove of the adjacent battery box, and the connecting piece is inserted into and connects the two adjacent battery boxes at the position of the extension.

[0012] In an embodiment, the battery box comprises a plurality of side plates and a bottom plate arranged at one side in the first direction, and the bottom plate and the plurality of side plates enclose an open cavity; the openings of the open cavities are oriented in the same direction, and the insertion position of the connecting piece corresponds to the bottom plate of one of the two adjacent battery boxes.

[0013] In an embodiment, the connecting piece is a threaded piece or a pin.

[0014] In an embodiment, the battery box is provided with a threaded hole for screwing a hanging connecting piece.

[0015] The utility model has the advantages that the connecting piece is inserted into and connects the adjacent battery box from the outer side of one of the battery boxes, so that the connecting piece does not need to penetrate through the entire battery box in the first direction to connect the two adjacent battery boxes, a shorter connecting piece can be selected to connect the two battery boxes, which is beneficial to saving cost, lightening and improving production and assembly efficiency; in addition, the connecting piece does not need to consider the obstruction of other battery boxes in the first direction, and the battery boxes can be connected simultaneously, which is beneficial to improving production efficiency and facilitating flexible disassembly and maintenance of the battery box; the battery box does not need to be provided with an additional protruding edge for connection, so that the setting of the protruding edge does not affect the outer size of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0017] Figure 1 It is the perspective view of the battery pack of the embodiment of the utility model;

[0018] Figure 2 It is the front view of Figure 1 ;

[0019] Figure 3 It is the top view of Figure 1 ;

[0020] Figure 4 It isFigure 1 Bottom view of

[0021] Figure 5 yes Figure 1 Left view of;

[0022] Figure 6 yes Figure 1 Right view of;

[0023] Figure 7 is a side cross-sectional view of a battery pack without a battery module;

[0024] Figure 8 yes Figure 7 A partial enlarged view of the middle B area;

[0025] Figure 9 yes Figure 8 Figure 2 shows a state where no connector is inserted;

[0026] Figure 10 is a side cross-sectional view of a battery pack including a battery module;

[0027] Figure 11 It is a three-dimensional diagram of the battery box;

[0028] Figure 12 This is the front view of the battery box;

[0029] Figure 13 yes Figure 12 A partial enlarged cross-sectional view of area A in the middle.

[0030] In the figure: 1. Battery pack; 2. Connector; 3. Battery box; 3M, first battery box; 3N, second battery box; 31. Ring platform; 311, extension; 32. Ring groove; 321, accommodating groove; 33. Bottom plate; 34. Side plate; 35. Opening; 36. Support platform; 37. Threaded hole; 38. Socket; 4. Sealing ring; 5. Box cover; 6. MSD battery management system; 7. Water inlet and outlet components; 8. Battery module. DETAILED DESCRIPTION

[0031] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the description of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are also within the scope of protection of the present invention.

[0032] In the description of the utility model, unless another explicit provision and limitation, the terms "set", "install", "connect" and the like should be broad sense, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, which is only for the convenience of description and simplification of description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] The terms "first", "second", "third" and the like are merely for distinguishing similar attributes, and are not intended to indicate or imply relative importance or a particular order.

[0035] The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, other elements not explicitly listed can also be contained.

[0036] The utility model provides a kind of battery pack 1, as shown in Figures 1 to 13 Adjacent two battery boxes 3 are connected via connecting piece 2, battery box 3 includes the outer side parallel with first direction X, connecting piece 2 is inserted from the outer side of one of battery box 3 and is connected with another battery box 3 adjacent thereto.In the embodiment, connecting piece 2 is inserted from the outer side of one of battery box 3 and is connected with another battery box 3 adjacent thereto, so that connecting piece 2 does not need to penetrate the entire battery box 3 along first direction X to connect two adjacent battery boxes 3, shorter connecting piece 2 can be selected to complete the connection of two battery boxes 3, which is beneficial to save cost, lightweight, improve production and assembly efficiency;And without considering the obstruction of other battery boxes 3 to connecting piece 2 in first direction X, without connecting each battery box 3 along first direction X in turn, any adjacent battery box 3 can be connected simultaneously, which is beneficial to improve production efficiency, also facilitate flexible disassembly and overhaul of battery box 3;Battery box 3 also does not need to be provided with additional connecting protruding edge, to avoid the influence of the setting of protruding edge on the outer dimension of battery pack 1.

[0037] As an implementation mode, as shown in Figure 1As shown in FIG. 1, two adjacent battery boxes 3 are connected via a plurality of connecting pieces 2, which can be evenly distributed on the outer side of the battery box 3; for example, when the battery box 3 is a cuboid or a cube structure, four outer sides of the battery box 3 are evenly distributed with a plurality of connecting pieces 2, so that two adjacent battery boxes 3 are connected stably, and the breakage of one connecting piece 2 does not cause the disconnection of two adjacent battery boxes 3.

[0038] As an embodiment, as shown in FIG. 1, Figures 7 to 9 As shown in FIG. 1, two adjacent battery boxes 3 are connected via a plurality of connecting pieces 2, which can be evenly distributed on the outer side of the battery box 3; for example, when the battery box 3 is a cuboid or a cube structure, four outer sides of the battery box 3 are evenly distributed with a plurality of connecting pieces 2, so that two adjacent battery boxes 3 are connected stably, and the breakage of one connecting piece 2 does not cause the disconnection of two adjacent battery boxes 3.

[0039] As an embodiment, the insertion direction of the connecting piece 2 is different from the first direction X.

[0040] As an embodiment, as shown in FIG. 1, Figure 1 , Figure 7 and Figure 8 As an embodiment, the insertion direction of the connecting piece 2 is perpendicular to the first direction X. In this way, the connecting piece 2 can be shorter and still complete the connection, which is beneficial for cost saving, light weight, and improving the disassembly efficiency.

[0041] As an embodiment, as shown in FIG. 1, Figures 7 to 9 As shown in FIG. 1, the second battery box 3N is provided with a receiving groove 321 corresponding to the extension part 311 of the first battery box 3M, and the extension part 311 of the first battery box 3M is accommodated in the receiving groove 321 of the second battery box 3N. Specifically, the extension part 311 of the first battery box 3M can be completely accommodated in the receiving groove 321 of the second battery box 3N, so as to avoid the increase of the outer size of the battery pack 1.

[0042] As an embodiment, as shown in FIG. 1, Figures 7 to 11As shown, the outer edges of the end face of the first battery box 3M towards the second battery box 3N are each provided with an extension 311, and the extensions 311 at the end face of the first battery box 3M are sequentially connected end to end to form a ring platform 31, and the second battery box 3N is provided with a receiving groove 321 corresponding to each extension 311 forming the ring platform 31, and the corresponding receiving grooves 321 are sequentially connected end to end to form a ring groove 32. In this embodiment, the two adjacent battery boxes 3 are matched by the ring platform 31 and the ring groove 32, facilitating the positioning and assembly of the adjacent battery boxes 3, and being conducive to limiting and improving the stability of the connection.

[0043] As an embodiment, in each battery box 3, at least one battery box 3 is provided with an extension 311 at both ends in the first direction X, and / or at least one battery box 3 is provided with a receiving groove 321 at both ends in the first direction X, and / or, as shown in Figures 7 to 11 As shown, at least one battery box 3 is provided with an extension 311 at one end and a receiving groove 321 at the other end in the first direction X. Here, different types of battery boxes 3 provided with extensions 311 and receiving grooves 321 can be selected and stacked, so that the extensions 311 and the receiving grooves 321 of the adjacent battery boxes 3 can be inserted and matched with each other.

[0044] As an embodiment, as shown in Figures 7 to 13 As shown, one end of each battery box 3 in the first direction X is provided with an extension 311 protruding in the first direction X, and the other end is provided with a receiving groove 321 capable of cooperating with the extension 311. The extension 311 of one battery box 3 is received in the receiving groove 321 of the adjacent battery box 3, and the connecting piece 2 is inserted and connected between the two adjacent battery boxes 3 at the position of the extension 311. In this embodiment, it is convenient to further make the structures of each battery box 3 the same, thereby being conducive to reducing the types of battery boxes 3, saving costs, simplifying the structure, and facilitating assembly.

[0045] As an embodiment, as shown in Figures 7 to 13 As shown, the battery box 3 comprises a plurality of side plates 34 and a bottom plate 33 arranged on one side in the first direction X, and the bottom plate 33 and the plurality of side plates 34 enclose an open cavity 35. Specifically, the plurality of side plates 34 are connected one by one to each edge of the bottom plate 33.

[0046] As an embodiment, the extension 311 of the first battery box 3M is inserted into the bottom plate 33 or the side plate 34 of the second battery box 3N, but not inserted into the open cavity 35 of the second battery box 3N, so as to avoid affecting the sealing performance. As shown in Figure 7 and Figure 8 As shown, the extension 311 of the first battery box 3M is inserted into the side plate 34 of the second battery box 3N.

[0047] As an embodiment, as shown in Figures 7 to 11As shown, the bottom plate 33 is connected with the side plate 34 through a surface parallel to the first direction X, and the side plate 34 is provided with an extension 311 and a receiving groove 321 at two ends thereof along the first direction X. Along the first direction X, the end of the side plate 34 away from the bottom plate 33 must be provided with the extension 311 or the receiving groove 321. In this embodiment, the extension 311 or the receiving groove 321 is provided on the side plate 34, and there is no need to design and process the extension 311 or the receiving groove 321 on the bottom plate 33, which is convenient for production and processing.

[0048] As an embodiment, as shown in Figure 7 and Figure 8 As shown, the openings of the open cavities 35 are oriented in the same direction, and the insertion position of the connecting member 2 in the adjacent two battery boxes 3 corresponds to the bottom plate 33 of one of the battery boxes 3. In this way, when the connecting member 2 needs to be longer to improve the connection stability, the connecting member 2 can be inserted into the bottom plate 33 of one battery box 3, so as to avoid that the connecting member 2 is inserted into the open cavity 35 of the battery box 3 and affects the sealing performance of the open cavity 35. Specifically, in this embodiment, the end of the side plate 34 close to the bottom plate 33 in each battery box 3 is provided with the receiving groove 321.

[0049] As an embodiment, as shown in Figures 7 to 13 and As shown, a sealing ring 4 is arranged between the adjacent two battery boxes 3 and surrounds the open cavity 35. In this way, each battery box 3 does not need to be provided with a box cover 5 to seal the open cavity 35, and the open cavity 35 can be sealed by the bottom plate 33, the side plate 34, the sealing ring 4 and the bottom plate 33 of the adjacent battery box 3, which is beneficial to reduce the number of the box covers 5, and further beneficial to reduce the size of the battery pack 1 in the first direction X, improve the energy density of the battery pack 1, reduce the weight of the battery pack 1, and improve the endurance of the battery pack 1. Specifically, the side plate 34 on the inner side of the ring table 31 forms a support table 36 for placing the sealing ring 4, and the sealing ring 4 is placed on the support table 36. The sealing ring 4 is arranged to improve the waterproof sealing performance of the battery pack 1 and improve the safety performance.

[0050] Figure 7 As an embodiment, as shown in Figure 8 and As shown, the battery pack 1 further comprises a box cover 5, and the box cover 5 covers the open cavity 35 opening in the direction away from the remaining open cavities 35 (i.e., the open cavity 35 without the open cavity 35 of the adjacent battery box 3 on the opening side). The sealing ring 4 is arranged between the box cover 5 and the corresponding battery box 3.

[0051] As an embodiment, the connecting member 2 is a threaded member or a pin. Specifically, the threaded member can comprise a gasket and a bolt screwed with the battery box 3, and the pin is an interference pin inserted with the battery box 3.

[0052] Figure 1 As an embodiment, as shown in Figure 12 andAs shown, the battery box 3 is provided with a threaded hole 37 for screwing a lifting fitting. In this way, the conventional lifting fitting fixed to the battery box 3 is cancelled, and when the battery pack 1 needs to be lifted and carried, only the lifting fitting such as a lifting ring needs to be screwed, and then the lifting and carrying can be performed by using a lifting tool. After the carrying is completed, the lifting fitting is removed, so that the lifting fitting is not fixed to the battery pack 1, which is beneficial to reduce the outer size of the battery pack 1 when the lifting and carrying is not needed, and improve the energy density.

[0053] As an embodiment, as shown in the drawings, Figure 7 As shown, the first direction X is vertical, and each open cavity 35 is upwardly open, and the box cover 5 is located at the top of the battery pack 1.

[0054] As an embodiment, as shown in the drawings, Figure 10 As shown, the battery pack 1 comprises a battery module 8, and the battery module 8 is accommodated in each open cavity 35. Specifically, the battery module 8 is mounted on the bottom plate 33 of the battery box 3.

[0055] As an embodiment, as shown in the drawings, Figures 1 to 4 As shown, at least part of the battery box 3 is provided with an MSD battery management system 6 and an inlet and outlet water port component 7.

[0056] As an embodiment, the bottom plate 33 and / or the side plate 34 is provided with a cooling flow channel (not shown), and the inlet and outlet water port component 7 can be used to circulate cooling liquid in the bottom plate 33, the side plate 34 and / or the open cavity 35.

[0057] The connecting piece 2 of the utility model does not need to penetrate through the whole battery box 3 along the first direction X to connect two adjacent battery boxes 3, and a shorter connecting piece 2 can be selected to connect two battery boxes 3, which is beneficial to save cost, light weight, improve production and assembly efficiency, and facilitate disassembly and maintenance.

[0058] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above, it is not intended to limit the utility model. Any skilled person in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution range of the utility model, and equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the utility model are still within the protection range of the technical solution of the utility model.

Claims

1. A battery pack, characterized by, The battery box (3) comprises a plurality of side plates (34) and a bottom plate (33) arranged on one side along the first direction (X), and the bottom plate (33) and the plurality of side plates (34) enclose an open cavity (35); the openings of the open cavities (35) are oriented in the same direction, and in adjacent two battery boxes (3), the insertion position of the connecting piece (2) corresponds to the bottom plate (33) of one of the battery boxes (3).

2. The battery pack of claim 1, wherein, The connecting piece (2) is a threaded piece or a pin.

3. The battery pack of claim 2, wherein, The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece.

4. The battery pack of claim 2, wherein, The connecting piece (2) is a threaded piece or a pin.

5. The battery pack of claim 4, wherein, The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece.

6. The battery pack of claim 1, wherein, The connecting piece (2) is a threaded piece or a pin.

7. The battery pack of claim 6, wherein, The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece.

8. The battery pack of claim 1, wherein, The connecting piece (2) is a threaded piece or a pin.

9. The battery pack of claim 1, wherein, The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece. The connecting piece (2) is a threaded piece or a pin. The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece. The connecting piece (2) is a threaded piece or a pin. The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece. The connecting piece (2) is a threaded piece or a pin. The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece. The connecting piece (2) is a threaded piece or a pin. The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece. The connecting piece (2) is a threaded piece or a pin. The battery box (3) is provided with a threaded hole (37) for screwing a hanging connecting piece. The connecting piece (2) is a threaded piece or a pin. 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