Battery module, battery pack and new energy vehicle

Abstract

The embodiment of the utility model provides a battery module, a battery pack and a new energy vehicle, which relate to the field of power battery technology. The battery module includes a first battery module, a second battery module and a middle end plate, the first battery module includes a first battery group and a first end plate; the second battery module includes a second battery group and a second end plate; wherein the first end plate, the first battery group, the second battery group and the second end plate are arranged in sequence; the middle end plate is arranged between the first battery group and the second battery group, the middle end plate is used to cooperate with the first end plate to fix the first battery group, and the middle end plate is also used to cooperate with the second end plate to fix the second battery group. The battery module can save space, reduce the number of components, improve the lightweight level, and reduce costs.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery module, a battery pack and a new energy vehicle. Background Art

[0002] With the rapid development of new energy vehicles, the design requirements for battery packs, which are the power source of new energy vehicles, are becoming increasingly higher. The energy density and endurance of battery packs are the main concerns of the current new energy market.

[0003] The energy density of existing battery packs is relatively low. In order to improve the vehicle's endurance, the number of battery modules in the battery pack is usually increased. However, assembling and connecting multiple battery modules will affect the layout space of the battery pack, increase the number of components, and lead to an increase in weight and cost. Utility Model Content

[0004] The purpose of the utility model includes, for example, providing a battery module, a battery pack and a new energy vehicle, which can save space, reduce the number of parts, improve the level of lightweight, and reduce costs.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the utility model provides a battery module, comprising:

[0007] A first battery module, the first battery module comprising a first battery group and a first end plate;

[0008] A second battery module, the second battery module comprising a second battery group and a second end plate; wherein the first end plate, the first battery group, the second battery group and the second end plate are arranged in sequence; and

[0009] A middle end plate, wherein the middle end plate is disposed between the first battery group and the second battery group, and is used to cooperate with the first end plate to fix the first battery group, and the middle end plate is also used to cooperate with the second end plate to fix the second battery group.

[0010] In an optional embodiment, the battery module further includes a first binding member, the first binding member is used to bind and fix the first end plate, the first battery pack and the middle end plate; and / or,

[0011] The battery module also includes a second binding member, which is used to bind and fix the second end plate, the second battery pack and the middle end plate.

[0012] In an optional embodiment, the middle end plate is provided with a binding groove, and the first binding member is bound to the first end plate, the first battery pack and the binding groove, so that the first end plate and the middle end plate are bound and fixed to the first battery pack; and / or,

[0013] The second binding member is bound to the second end plate, the second battery pack and the binding groove, so that the second end plate and the middle end plate are bound and fixed to the second battery pack.

[0014] In an optional embodiment, the middle end plate includes an end plate body, a first protrusion and a second protrusion, the first protrusion and the second protrusion are arranged at intervals on the end plate body, and form the binding groove with the end plate body;

[0015] The first protrusion, the first battery pack and the first end plate are bound and fixed by the first binding member; and / or,

[0016] The second protrusion, the second battery pack and the second end plate are bound and fixed by the second binding member.

[0017] In an optional embodiment, both ends of the first protrusion are provided with a first arc surface; and / or,

[0018] Second arc surfaces are provided at both ends of the second protrusion.

[0019] In an optional embodiment, the middle end plate is further provided with a first bolt hole, and the first bolt hole is arranged in the binding groove.

[0020] In an optional embodiment, the middle end plate includes a first fixing portion and a second fixing portion, and the battery module further includes an inter-module connector, and the first fixing portion and the second fixing portion are connected through the inter-module connector;

[0021] The first fixing portion, the first battery pack and the first end plate are bound and fixed by the first binding member; and / or,

[0022] The second fixing portion, the second battery pack and the second end plate are bound and fixed by the second binding member.

[0023] In an optional embodiment, the first battery module further includes a first integrated busbar, which is connected to the pole of the first battery pack; the second battery module further includes a second integrated busbar, which is connected to the pole of the second battery pack;

[0024] The battery module further includes an inter-module busbar, and the first integrated busbar and the second integrated busbar are electrically connected via the inter-module busbar.

[0025] In an optional embodiment, the first integrated busbar is provided with a first positive input interface and a first negative input interface at one end close to the second integrated busbar, and the second integrated busbar is provided with a first positive output interface and a first negative output interface at one end close to the first integrated busbar; the first positive output interface and the first positive input interface are electrically connected through the inter-module busbar, and the first negative output interface and the first negative input interface are electrically connected through the inter-module busbar.

[0026] In an optional embodiment, the first battery module further includes a first input isolation bracket and a second input isolation bracket, the first input isolation bracket and the second input isolation bracket are both arranged on the middle end plate, the first positive input interface is arranged on the first input isolation bracket, and the first negative input interface is arranged on the second input isolation bracket;

[0027] The second battery module also includes a first output isolation bracket and a second output isolation bracket, and the first output isolation bracket and the second output isolation bracket are both arranged on the middle end plate; and the first input isolation bracket and the first output isolation bracket are arranged at intervals, and the second input isolation bracket and the second output isolation bracket are arranged at intervals; the first positive output interface is arranged on the first output isolation bracket, and the first negative output interface is arranged on the second output isolation bracket.

[0028] In an optional embodiment, the first battery module further includes a first signal acquisition unit, which is disposed on the first integrated busbar; the second battery module further includes a second signal acquisition unit, which is disposed on the second integrated busbar, and the second signal acquisition unit is electrically connected to the first signal acquisition unit.

[0029] In an optional embodiment, a first signal input interface is provided at one end of the first signal acquisition unit close to the second signal acquisition unit, and a first signal output interface is provided at one end of the second signal acquisition unit close to the first signal acquisition unit. The first signal output interface extends in the direction of the first signal input interface and is electrically connected to the first signal input interface.

[0030] In an optional embodiment, the first integrated busbar is further provided with a limiting column, which is located on a side of the first signal input interface close to the first signal output interface; the first signal output interface is provided with a limiting hole, which cooperates with the limiting column.

[0031] In an optional embodiment, the extended portion of the first signal output interface is provided with a first redundant buffer structure.

[0032] In an optional embodiment, the inter-module busbar is provided with a second redundant buffer structure.

[0033] In a second aspect, the utility model provides a battery pack, comprising a lower box and the battery module described in any one of the aforementioned embodiments, wherein the first end plate, the first battery group, the middle end plate, the second battery group and the second end plate are all arranged in the lower box.

[0034] In an optional embodiment, the lower box body is provided with a first crossbeam, a middle crossbeam and a second crossbeam, and the first crossbeam, the middle crossbeam and the second crossbeam are arranged at intervals; the first battery group is arranged between the first crossbeam and the middle crossbeam, and the second battery group is arranged between the second crossbeam and the middle crossbeam; the first end plate is connected to the first crossbeam, the middle end plate is connected to the middle crossbeam, and the second end plate is connected to the second crossbeam.

[0035] In a third aspect, the utility model provides a new energy vehicle, comprising the battery pack described in the aforementioned embodiment.

[0036] The beneficial effects of the embodiments of the utility model include:

[0037] The battery module includes a first battery module, a second battery module and a middle end plate, wherein the first battery module includes a first battery group and a first end plate; the second battery module includes a second battery group and a second end plate; wherein the first end plate, the first battery group, the second battery group and the second end plate are arranged in sequence; the middle end plate is arranged between the first battery group and the second battery group, the middle end plate is used to cooperate with the first end plate to fix the first battery group, and the middle end plate is also used to cooperate with the second end plate to fix the second battery group. That is to say, the first battery module and the second battery module can respectively cooperate with the first end plate to fix the first battery group and cooperate with the second end plate to fix the second battery group by sharing a middle end plate; in this way, the number of end plates used in the first battery module and the second battery module can be reduced, thereby saving the layout space of the battery pack, improving the lightweight level, and correspondingly reducing the production cost; in addition, due to the space saving, more battery groups can be added on the basis of the original battery pack layout space, thereby improving the overall energy density of the battery pack.

[0038] The battery pack includes the battery module and has all the beneficial effects of the battery module.

[0039] The new energy vehicle includes the battery pack and has all the beneficial effects of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the structure of a new energy vehicle provided by an embodiment of the utility model;

[0042] Figure 2 A schematic diagram of the structure of a battery pack provided by an embodiment of the utility model;

[0043] Figure 3 A schematic diagram of the structure of a battery module provided by an embodiment of the utility model;

[0044] Figure 4 A schematic structural diagram of a middle end plate provided by an embodiment of the utility model from a first perspective;

[0045] Figure 5 A schematic structural diagram of a middle end plate from a second viewing angle provided by an embodiment of the utility model;

[0046] Figure 6 for Figure 3 A partial enlarged view of the middle A;

[0047] Figure 7 A schematic diagram of the structure of a first battery module provided in an embodiment of the utility model;

[0048] Figure 8 A schematic diagram of the structure of a second battery module provided in an embodiment of the utility model;

[0049] Fig. 9 A schematic diagram of the structure of a battery module provided by other embodiments of the utility model;

[0050] Fig.10 for Fig. 9 A partial enlarged view of point B in the middle;

[0051] Fig.11 A schematic diagram of the assembly of two battery modules from a first perspective provided in an embodiment of the utility model;

[0052] Fig.12 for Fig.11 A partial enlarged view of point C in the middle;

[0053] Fig.13 A schematic assembly diagram of two battery modules from a second viewing angle provided in an embodiment of the utility model.

[0054] Icon: 1000-new energy vehicle; 1100-battery pack; 100-battery module; 10-first battery module; 11-first battery pack; 111-first battery cell; 12-first end plate; 13-first integrated busbar; 131-first positive input interface; 132-first negative input interface; 133-second positive output interface; 134-second negative output interface; 135-limiting column; 14-first input isolation bracket; 15-second input isolation bracket; 16-first signal acquisition unit; 161-first signal input interface; 162-second signal output interface; 17-third output isolation bracket; 18-fourth output isolation bracket; 20-second battery module; 21-second battery pack; 211-second battery cell; 22-second end plate; 23-second integrated busbar; 231-first positive output interface; 232-first negative output interface port; 24-first output isolation bracket; 25-second output isolation bracket; 26-second signal acquisition unit; 261-first signal output interface; 2611-limiting hole; 2612-first redundant buffer structure; 30-middle end plate; 31-binding groove; 32-end plate body; 33-first protrusion; 331-first arc surface; 34-second protrusion; 341-second arc surface; 35-first bolt hole; 36- Second bolt hole; 37-third bolt hole; 38-first fixing part; 39-second fixing part; 40-first binding piece; 50-second binding piece; 60-inter-module busbar; 61-second redundant buffer structure; 70-inter-module connecting piece; 200-lower box body; 210-first crossbeam; 220-middle crossbeam; 230-second crossbeam; 300-inter-module connecting piece; 400-inter-module busbar; 1200-vehicle body. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0058] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0059] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0060] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0061] As described in the background technology, the energy density of existing battery packs is relatively low. In order to improve the endurance of a vehicle, the number of battery modules in the battery pack is usually increased. However, assembling and connecting multiple battery modules will affect the layout space of the battery pack, increase the number of components, and lead to an increase in weight and cost.

[0062] Based on this, please refer to Figure 1-Figure 13 The embodiments of the present invention provide a battery module 100, a battery pack 1100 and a new energy vehicle 1000, which can effectively improve the above-mentioned technical problems, that is, they can save space, reduce the number of components, improve the lightweight level, and reduce costs.

[0063] It should be noted that the first direction mentioned in the following content is Figure 2-Figure 13 The X direction is shown in the figure, and the second direction is Figure 2-Figure 13 The Y direction is shown in the figure, and the third direction is Figure 2-Figure 13 The Z direction is shown in the figure. The battery module 100, the battery pack 1100 and the new energy vehicle 1000 will be described in detail below.

[0064] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the new energy vehicle 1000 provided in this embodiment is combined with Figure 1The new energy vehicle 1000 includes a battery pack 1100 and a vehicle body 1200 . The battery pack 1100 is installed on the vehicle body 1200 , thereby providing electric energy for the vehicle body 1200 to realize various functions of the vehicle body 1200 .

[0065] Specifically, please refer to Figure 2 , Figure 2 The schematic diagram of the structure of the battery pack 1100 provided in this embodiment is shown in FIG. Figure 2 The battery pack 1100 includes a lower box 200 and a battery module 100. The battery module 100 is disposed in the lower box 200. That is, the battery module 100, as a power source in the battery pack 1100, can provide power to the vehicle body 1200. It is easy for those skilled in the art to know that the battery pack 1100 may also include other components such as an upper cover, a mounting panel assembly, a battery management unit, and a wiring harness, which are not described in detail in this embodiment.

[0066] For further information, please refer to Figure 3 , Figure 3 The schematic diagram of the structure of the battery module 100 provided in this embodiment is combined with Figure 3 The battery module 100 includes a first battery module 10, a second battery module 20 and a middle end plate 30. The first battery module 10 includes a first battery group 11 and a first end plate 12; the second battery module 20 includes a second battery group 21 and a second end plate 22; wherein the first end plate 12, the first battery group 11, the second battery group 21 and the second end plate 22 are arranged in sequence; the middle end plate 30 is arranged between the first battery group 11 and the second battery group 21, the middle end plate 30 is used to cooperate with the first end plate 12 to fix the first battery group 11, and the middle end plate 30 is also used to cooperate with the second end plate 22 to fix the second battery group 21.

[0067] That is to say, the first battery module 10 and the second battery module 20 share a middle end plate 30, and can respectively cooperate with the first end plate 12 to fix the first battery group 11, and cooperate with the second end plate 22 to fix the second battery group 21; this can reduce the number of end plates used in the first battery module 10 and the second battery module 20, thereby saving the layout space of the battery pack 1100, improving the lightweight level, and correspondingly reducing the production cost; in addition, since space is saved, more battery packs can be added on the basis of the original battery pack 1100 layout space, thereby improving the overall energy density of the battery pack 1100.

[0068] Combination Figure 2 and Figure 3The first end plate 12, the first battery group 11, the middle end plate 30, the second battery group 21 and the second end plate 22 are all arranged in the lower box body 200. In order to better install the first battery module 10 and the second battery module 20, the lower box body 200 is further provided with a first cross beam 210, a middle cross beam 220 and a second cross beam 230, and the first cross beam 210, the middle cross beam 220 and the second cross beam 230 are arranged at intervals; the first battery group 11 is arranged between the first cross beam 210 and the middle cross beam 220, and the second battery group 21 is arranged between the second cross beam 230 and the middle cross beam 220; the first end plate 12 is connected to the first cross beam 210, the middle end plate 30 is connected to the middle cross beam 220, and the second end plate 22 is connected to the second cross beam 230. In addition, it should be pointed out that the provision of the middle cross beam 220 can also improve the structural strength and rigidity of the lower box body 200 , thereby improving the overall structural stability of the battery pack 1100 .

[0069] It should be noted that the first crossbeam 210, the middle crossbeam 220 and the second crossbeam 230 are all provided with mounting holes, and the first end plate 12 and the first crossbeam 210, the middle end plate 30 and the middle crossbeam 220, and the second end plate 22 and the second crossbeam 230 can all be connected and fixed by bolts.

[0070] When installing the battery module 100, thermal conductive adhesive can be applied to the inner surface of the lower box 200, and then the first battery group 11 is set between the first beam 210 and the middle beam 220 and bonded with the thermal conductive adhesive, and the second battery group 21 is set between the second beam 230 and the middle beam 220 and bonded with the thermal conductive adhesive; then the first end plate 12 and the first beam 210 are fixed by bolts, the middle end plate 30 and the middle beam 220 are fixed by bolts, and the second end plate 22 and the second beam 230 are fixed by bolts.

[0071] Please continue to combine Figure 3 In the present embodiment, in order to better fix the first end plate 12 and the middle end plate 30 to the first battery group 11, the battery module further includes a first binding member 40, which is used to bind and fix the first end plate 12, the first battery group 11 and the middle end plate 30; similarly, in order to better fix the second end plate 22 and the middle end plate 30 to the first battery group 11, the battery module 100 further includes a second binding member 50, which is used to bind and fix the second end plate 22, the second battery group 21 and the middle end plate 30.

[0072] By disposing the first binding member 40 and the second binding member 50 , the cells of the first battery group 11 and the second battery group 21 can be constrained, further improving the structural stability of the entire battery module.

[0073] It should be noted that, in some other implementations, only the first binding member 40 or only the second binding member 50 may be provided.

[0074] It should also be noted that in order to increase the energy density of the battery module 100 and enhance the battery life of the battery pack 1100, the number of the first battery group 11 and the second battery group 21 can be multiple, and the multiple first battery groups 11 are stacked along the first direction, and each first battery group 11 includes a plurality of first battery cells 111, and the multiple first battery cells 111 are stacked along the second direction; the multiple second battery groups 21 are stacked along the first direction, and each second battery group 21 includes a plurality of second battery cells 211, and the multiple second battery cells 211 are stacked along the second direction; wherein the first direction and the second direction form an angle.

[0075] It can be understood that the first binding member 40 and the second binding member 50 can respectively bind and fix the multiple first battery groups 11 and the multiple second battery groups 21, so that the multiple first battery cells 111 stacked in a matrix are clamped and fixed by the first end plate 12 and the middle end plate 30, and the multiple second battery cells 211 stacked in a matrix are clamped and fixed by the second end plate 22 and the middle end plate 30.

[0076] Please refer to Figure 4 , Figure 4 The schematic diagram of the structure of the middle end plate 30 provided in the present embodiment from a first perspective, combined with Figure 3 and Figure 4 In order to facilitate the bundling of the first bundling piece 40 and the second bundling piece 50, a bundling groove 31 is provided on the middle end plate 30. The first bundling piece 40 is bundled with the first end plate 12, the first battery pack 11 and the bundling groove 31, so that the first end plate 12 and the middle end plate 30 are bundled and fixed with the first battery pack 11; similarly, the second bundling piece 50 is bundled with the second end plate 22, the second battery pack 21 and the bundling groove 31, so that the second end plate 22 and the middle end plate 30 are bundled and fixed with the second battery pack 21.

[0077] For further information, please refer to Figure 5 , Figure 5 The schematic diagram of the structure of the middle end plate 30 provided in the present embodiment from a second perspective, combined with Figure 3-Figure 5 The middle end plate 30 includes an end plate body 32, a first protrusion 33 and a second protrusion 34. The first protrusion 33 and the second protrusion 34 are spaced apart from the end plate body 32 and form a binding groove 31 with the end plate body 32. It is easy to understand that the first protrusion 33, the first battery group 11 and the first end plate 12 are bound and fixed by the first binding piece 40; the second protrusion 34, the second battery group 21 and the second end plate 22 are bound and fixed by the second binding piece 50.

[0078] In order to further improve the structural stability, the number of the first protrusions 33 and the second protrusions 34 are both two. The two first protrusions 33 are respectively arranged at the two ends of the end plate body 32 along the third direction, and the two second protrusions are respectively arranged at the two ends of the end plate body 32 along the third direction, so that they can form two upper and lower binding grooves 31 together with the end plate body 32; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0079] like Figure 4 and Figure 5 As shown, the middle end plate 30 is an "H"-shaped structure as a whole; it is easy to understand that the corresponding first binding members 40 and the second binding members 50 are also two in number, the two first binding members 40 are bound with the two first protrusions 33 in a one-to-one correspondence, and the two second binding members 50 are bound with the two second protrusions 34 in a one-to-one correspondence, so that the fixing effect of the middle end plate 30 as a whole and the first battery group 11 and the second battery group 21 is stronger.

[0080] It should be noted that the first binding member 40 and the second binding member 50 can be other binding structures such as steel belts or steel ropes.

[0081] Since the first binding member 40 and the second binding member 50 will have corresponding corner points during the binding and winding process, in order to reduce the stress of the first binding member 40 and the second binding member 50 at the corner of the middle end plate 30, both ends of the first protrusion 33 are provided with a first arc surface 331, and both ends of the second protrusion 34 are provided with a second arc surface 341. The provision of the arc surface can facilitate full contact during binding, reduce stress friction, and increase the service life of the first binding member 40 and the second binding member 50.

[0082] Of course, such a curved surface structure may also be provided at corresponding corners of the first end plate 12 and the second end plate 22 .

[0083] Furthermore, the middle end plate 30 is also provided with a first bolt hole 35, and the first bolt hole 35 is arranged in the binding groove 31; it is easy to understand that the bolt can be passed through the first bolt hole 35 to connect and fix with the middle cross beam 220 of the lower box body 200, and the first bolt hole 35 is arranged in the binding groove 31, which can facilitate the middle end plate 30 to be fixedly connected with the lower box body 200 after the battery pack is bundled and assembled, and at the same time, the thickness of the middle end plate 30 can be reduced, thereby further saving the layout space of the battery pack 1100, reducing costs and improving the lightweight level.

[0084] In the actual assembly process, the first battery pack 11 and the second battery pack 21 need to be electrically connected to achieve the transmission of electric energy. For details, please refer to Figure 6 , Figure 6 for Figure 3 The local enlarged view of A in the middle, combined with Figure 3 and Figure 6 The first battery module 10 also includes a first integrated busbar 13, which is connected to the pole of the first battery group 11; the second battery module 20 also includes a second integrated busbar 23, which is connected to the pole of the second battery group 21; the battery module 100 also includes an inter-module busbar 60, and the first integrated busbar 13 and the second integrated busbar 23 are electrically connected through the inter-module busbar 60.

[0085] By setting the busbar 60 between modules, the first battery group 11 and the second battery group 21 can be conveniently electrically connected, the assembly operation is simple, and the connection difficulty of the first integrated busbar 13 and the second integrated busbar 23 is reduced, that is, the design difficulty in the manufacturing process is reduced.

[0086] Specifically, please refer to Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the structure of the first battery module 10 provided in this embodiment. Figure 8 The schematic diagram of the structure of the second battery module 20 provided in this embodiment, combined with Figure 6-Figure 8 The first integrated busbar 13 is provided at one end close to the second integrated busbar 23 with a first positive input interface 131 and a first negative input interface 132, and the second integrated busbar 23 is provided at one end close to the first integrated busbar 13 with a first positive output interface 231 and a first negative output interface 232; the first positive output interface 231 is electrically connected to the first positive input interface 131 through the inter-module busbar 60, and the first negative output interface 232 is electrically connected to the first negative input interface 132 through the inter-module busbar 60.

[0087] It should be noted that a second positive output interface 133 and a second negative output interface 134 are also provided at one end of the first integrated busbar 13 away from the second integrated busbar 23. In this way, after the first battery group 11 and the second battery group 21 are connected to form a whole through the positive and negative input and output interfaces, the positive and negative electrodes of the entire battery module 100 are electrically connected to the battery pack 1100 or other components of the new energy vehicle 100 through the second positive output interface 133 and the second negative output interface 134, respectively, to transmit the electrical energy of the entire battery module 100.

[0088] Furthermore, in order to better install the first positive input interface 131, the first negative input interface 132, the first positive output interface 231 and the first negative output interface 232, and insulate the above-mentioned output and input interfaces from the middle end plate 30; the first battery module 10 also includes a first input isolation bracket 14 and a second input isolation bracket 15, the first input isolation bracket 14 and the second input isolation bracket 15 are both arranged on the middle end plate 30, the first positive input interface 131 is arranged on the first input isolation bracket 14, and the first negative input interface 132 is arranged on the second input isolation bracket 15;

[0089] Similarly, the second battery module 20 also includes a first output isolation bracket 24 and a second output isolation bracket 25, and the first output isolation bracket 24 and the second output isolation bracket 25 are both arranged on the middle end plate 30; and the first input isolation bracket 14 and the first output isolation bracket 24 are arranged at intervals, and the second input isolation bracket 15 and the second output isolation bracket 25 are arranged at intervals; the first positive output interface 231 is arranged on the first output isolation bracket 24, and the first negative output interface 232 is arranged on the second output isolation bracket 25.

[0090] Combination Figure 5 In this embodiment, the first input isolation bracket 14 and the second input isolation bracket 15 are both arranged on the first raised portion 33, and the first output isolation bracket 24 and the second output isolation bracket 25 are both arranged on the second raised portion 34; specifically, the first raised portion 33 is provided with a plurality of second bolt holes 36, which are convenient for fixing the first input isolation bracket 14 and the second input isolation bracket 15 to the first raised portion 33 by bolts; the second raised portion 34 is provided with a plurality of third bolt holes 37, which are convenient for fixing the first output isolation bracket 24 and the second output isolation bracket 25 to the second raised portion 34 by bolts.

[0091] At the same time, it is easy to understand that the through bolts passing through the second bolt hole 36 and the third bolt hole 37 can be further connected and fixed to the middle cross beam 220 in the lower box body 200, thereby further improving the connection stability of the middle end plate 30 and enabling it to better fix the first battery group 11 and the second battery group 21.

[0092] Please continue to combine Figure 7Similarly, in order to better install the second positive output interface 133 and the second negative output interface 134, and to insulate the above-mentioned output interfaces from the first end plate 12; in the present embodiment, the first battery module 10 also includes a third output isolation bracket 17 and a fourth output isolation bracket 18, the third output isolation bracket 17 and the fourth output isolation bracket 18 are both arranged on the first end plate 12, and the second positive output interface 133 is arranged on the third output isolation bracket 17, and the second negative output interface 134 is arranged on the fourth output isolation bracket 18.

[0093] Of course, bolt holes may also be provided on the first end plate 12, and the third output isolation bracket 17 and the fourth output isolation bracket 18 may be fixed to the first end plate 12 by bolts. It is easy to understand that bolts may also be passed through the bolt holes and connected to the first crossbeam 210 of the lower box 200, so as to better connect and fix the first end plate 12 to the first crossbeam 210, thereby further improving the stability of the overall structure.

[0094] Please continue to combine Figure 3 In order to collect signals such as temperature and voltage of the first battery group 11 and the second battery group 21, in the present embodiment, the first battery module 10 further includes a first signal acquisition unit 16, which is disposed on the first integrated busbar 13; the second battery module 20 further includes a second signal acquisition unit 26, which is disposed on the second integrated busbar 23, and the second signal acquisition unit 26 is electrically connected to the first signal acquisition unit 16.

[0095] It should be noted that in this embodiment, the number of the first battery group 11 and the number of the second battery group 21 are both two. Therefore, the number of the first signal acquisition unit 16 and the second signal acquisition unit 26 in this embodiment are also two, which are used to respectively collect voltage, temperature and other signals of the first battery group 11 and the second battery group 21.

[0096] Specifically, please combine Figure 6-Figure 8 The first signal acquisition unit 16 has a first signal input interface 161 at one end close to the second signal acquisition unit 26, and the second signal acquisition unit 26 has a first signal output interface 261 at one end close to the first signal acquisition unit 16. The first signal output interface 261 extends toward the direction of the first signal input interface 161 and is electrically connected to the first signal input interface 161. Figure 6 and Figure 8 As shown, a portion of the first signal output interface 261 extends out and is plugged into the first signal input interface 161. It is easy to understand that the first signal acquisition unit 16 and the second signal acquisition are connected in this bridging manner, which can reduce the difficulty of the manufacturing process and facilitate assembly.

[0097] Combination Figure 7 It should be noted that the first signal acquisition unit 16 is further provided with a second signal output interface 162 at one end away from the second signal acquisition unit 26. The second signal output interface 162 can be electrically connected to the battery pack 1100 or other components of the new energy vehicle 1000 to transmit the signals collected by the entire battery module 100.

[0098] Please continue to combine Figure 6 In order to prevent the connection between the first signal output interface 261 and the first signal input interface 161 from loosening during transportation, the first integrated busbar 13 is also provided with a limiting column 135, which is located on the side of the first signal input interface 161 close to the first signal output interface 261; the first signal output interface 261 is provided with a limiting hole 2611, which cooperates with the limiting column 135.

[0099] During the process of assembling the battery module 100 to the lower box body 200, due to the matching relationship between the first battery module 10, the second battery module 20 and the middle end plate 30, when entering the lower box body 200, there will be a certain amount of extrusion between the first battery module 10 and the second battery module 20 and the middle end plate 30, thereby affecting the connection effect between the first signal output interface 261 and the first signal input interface 161. In order to avoid this situation, the extended part of the first signal output interface 261 is provided with a first redundant buffer structure 2612.

[0100] like Figure 6 As shown, in this embodiment, the first redundant buffer structure 2612 is a concave structure with a certain elasticity, which can absorb the position tolerance of the first battery module 10 and the second battery module 20 when they are placed in the box, and further improve the connection stability. Of course, in other embodiments, the first redundant buffer structure 2612 can also be a convex structure or a spiral corrugated structure, as long as it can achieve the buffering effect.

[0101] Furthermore, the inter-module busbar 60 is also provided with a second redundant buffer structure 61, which can also play a buffering role in the connection process between the first integrated busbar 13 and the second integrated busbar 23, thereby improving the connection stability. It should be noted that the second redundant buffer structure 61 can also be other structures such as convex, concave or spiral corrugated.

[0102] It should be pointed out that in the present embodiment, the middle end plate 30 is an overall "H"-shaped structure. Of course, in other embodiments, in order to facilitate the independent assembly and disassembly of the first battery module 10 and the second battery module 20, the middle end plate 30 may also adopt a segmented structure.

[0103] Specifically, please refer to Fig. 9 and Fig.10 , Fig. 9 A schematic diagram of the structure of a battery module 100 provided in another embodiment, Fig.10 for Fig. 9 The local enlarged picture of B in the middle, combined with Fig. 9 and Fig.10 In other embodiments, the middle end plate 30 includes a first fixing portion 38 and a second fixing portion 39, and the battery module 100 also includes an inter-module connector 70, and the first fixing portion 38 and the second fixing portion 39 are connected by the inter-module connector 70; the first fixing portion 38, the first battery group 11 and the first end plate 12 are bundled and fixed by the first binding member 40; the second fixing portion 39, the second battery group 21 and the second end plate 22 are bundled and fixed by the second binding member 50.

[0104] Similarly, bolt holes may be provided in the first fixing portion 38 and the second fixing portion 39, and the inter-module connector 70 may be fixed to the first fixing portion 38 and the second fixing portion 39 at the same time by bolt connection, so that the first fixing portion 38 and the second fixing portion 39 are connected as a whole, thereby improving the stability of the entire battery module 100.

[0105] Please continue to combine Figure 2 In order to improve the energy density of the battery pack 1100, the number of battery modules 100 can be multiple, and the multiple battery modules 100 are arranged along the first direction, and the first end plate 12, the first battery group 11, the middle end plate 30, the second battery group 21 and the second end plate 22 in each battery module 100 are arranged in sequence along the second direction.

[0106] In this embodiment, the number of the battery modules 100 is two. Of course, in other embodiments, the number of the battery modules 100 may be three, four, five, etc.

[0107] Further, in order to connect and fix multiple battery modules 100, please refer to Figure 11-13 , Fig.11 The first perspective assembly diagram of two battery modules 100 provided in this embodiment is shown in FIG. Fig.12 for Fig.11 A partial enlarged view of point C in the middle. Fig.13 The second perspective assembly diagram of the two battery modules 100 provided in this embodiment is combined with Figure 11-13 The battery pack 1100 also includes an inter-module connector 300, two adjacent first end plates 12 are connected and fixed by the inter-module connector 300, two adjacent middle end plates 30 are connected and fixed by the inter-module connector 300, and two adjacent second end plates 22 are also connected and fixed by the inter-module connector 300.

[0108] In addition, in order to realize the series connection of the integrated busbars in the multiple battery modules 100, in this embodiment, the battery pack 1100 further includes an inter-module busbar 400, such as Fig.12 As shown, the second negative output interface 134 in one battery module 100 is electrically connected to the second positive output interface 133 in another adjacent battery module 100 through the inter-module busbar 400 .

[0109] In summary, an embodiment of the utility model provides a battery module 100, a battery pack 1100 and a new energy vehicle 1000, wherein the battery module 100 includes a first battery module 10, a second battery module 20 and a middle end plate 30, wherein the first battery module 10 includes a first battery group 11 and a first end plate 12; the second battery module 20 includes a second battery group 21 and a second end plate 22; wherein the first end plate 12, the first battery group 11, the second battery group 21 and the second end plate 22 are arranged in sequence; the middle end plate 30 is arranged between the first battery group 11 and the second battery group 21, the middle end plate 30 is used to cooperate with the first end plate 12 to fix the first battery group 11, and the middle end plate 30 is also used to cooperate with the second end plate 22 to fix the second battery group 21. That is to say, the first battery module 10 and the second battery module 20 share a middle end plate 30, and can respectively cooperate with the first end plate 12 to fix the first battery group 11, and cooperate with the second end plate 22 to fix the second battery group 21; this can reduce the number of end plates used in the first battery module 10 and the second battery module 20, thereby saving the layout space of the battery pack 1100, improving the lightweight level, and correspondingly reducing the production cost; in addition, since space is saved, more battery packs can be added on the basis of the original battery pack 1100 layout space, thereby improving the overall energy density of the battery pack 1100.

[0110] Therefore, the battery module 100 can save space, reduce the number of components, improve the lightweight level, and reduce costs.

[0111] The battery pack 1100 includes a battery module 100 and a lower case 200 . The battery module 100 is disposed in the lower case 200 . The battery pack 1100 has all the functions and beneficial effects of the battery module 100 .

[0112] The new energy vehicle 1000 includes the battery pack 1100 , which has all the functions and beneficial effects of the battery pack 1100 .

[0113] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A battery module, characterized in that: include: A first battery module (10), the first battery module (10) comprising a first battery group (11) and a first end plate (12); A second battery module (20), the second battery module (20) comprising a second battery group (21) and a second end plate (22); wherein the first end plate (12), the first battery group (11), the second battery group (21) and the second end plate (22) are arranged in sequence; and A middle end plate (30), the middle end plate (30) being arranged between the first battery group (11) and the second battery group (21), the middle end plate (30) being used to cooperate with the first end plate (12) to fix the first battery group (11), and the middle end plate (30) being also used to cooperate with the second end plate (22) to fix the second battery group (21).

2. The battery module according to claim 1, characterized in that: The battery module (100) further comprises a first binding member (40), wherein the first binding member (40) is used to bind and fix the first end plate (12), the first battery group (11) and the middle end plate (30); and / or, The battery module (100) further comprises a second binding member (50), wherein the second binding member (50) is used to bind and fix the second end plate (22), the second battery group (21) and the middle end plate (30).

3. The battery module according to claim 2, characterized in that: The middle end plate (30) is provided with a binding groove (31), and the first binding member (40) is bound to the first end plate (12), the first battery pack (11) and the binding groove (31), so that the first end plate (12) and the middle end plate (30) are bound and fixed to the first battery pack (11); and / or, The second binding member (50) is bound to the second end plate (22), the second battery pack (21) and the binding groove (31), so that the second end plate (22) and the middle end plate (30) are bound and fixed to the second battery pack (21).

4. The battery module according to claim 3, characterized in that: The middle end plate (30) comprises an end plate body (32), a first protrusion (33) and a second protrusion (34); the first protrusion (33) and the second protrusion (34) are arranged at intervals on the end plate body (32) and form the binding groove (31) with the end plate body (32); The first protruding portion (33), the first battery pack (11) and the first end plate (12) are bound and fixed by the first binding member (40); and / or, The second protruding portion (34), the second battery pack (21) and the second end plate (22) are bound and fixed by the second binding member (50).

5. The battery module according to claim 4, characterized in that: Both ends of the first protruding portion (33) are provided with a first arc surface (331); and / or, Second arc surfaces (341) are provided at both ends of the second protruding portion (34).

6. The battery module according to claim 3, characterized in that: The middle end plate (30) is further provided with a first bolt hole (35), and the first bolt hole (35) is arranged in the binding groove (31).

7. The battery module according to claim 2, characterized in that: The middle end plate (30) comprises a first fixing portion (38) and a second fixing portion (39), and the battery module (100) further comprises an inter-module connector (70), and the first fixing portion (38) and the second fixing portion (39) are connected via the inter-module connector (70); The first fixing portion (38), the first battery pack (11) and the first end plate (12) are bound and fixed by the first binding member (40); And / or, the second fixing portion (39), the second battery pack (21) and the second end plate (22) are bound and fixed by the second binding member (50).

8. The battery module according to claim 1, characterized in that: The first battery module (10) further comprises a first integrated busbar (13), the first integrated busbar (13) being connected to the pole of the first battery group (11); the second battery module (20) further comprises a second integrated busbar (23), the second integrated busbar (23) being connected to the pole of the second battery group (21); The battery module (100) further comprises an inter-module busbar (60), and the first integrated busbar (13) and the second integrated busbar (23) are electrically connected via the inter-module busbar (60).

9. The battery module according to claim 8, characterized in that: The first integrated busbar (13) is provided with a first positive input interface (131) and a first negative input interface (132) at one end close to the second integrated busbar (23); the second integrated busbar (23) is provided with a first positive output interface (231) and a first negative output interface (232) at one end close to the first integrated busbar (13); the first positive output interface (231) is electrically connected to the first positive input interface (131) via the inter-module busbar (60); the first negative output interface (232) is electrically connected to the first negative input interface (132) via the inter-module busbar (60).

10. The battery module according to claim 9, characterized in that: The first battery module (10) further comprises a first input isolation bracket (14) and a second input isolation bracket (15), the first input isolation bracket (14) and the second input isolation bracket (15) are both arranged on the middle end plate (30), the first positive input interface (131) is arranged on the first input isolation bracket (14), and the first negative input interface (132) is arranged on the second input isolation bracket (15); The second battery module (20) further comprises a first output isolation bracket (24) and a second output isolation bracket (25), wherein the first output isolation bracket (24) and the second output isolation bracket (25) are both arranged on the middle end plate (30); the first input isolation bracket (14) and the first output isolation bracket (24) are arranged at intervals, and the second input isolation bracket (15) and the second output isolation bracket (25) are arranged at intervals; the first positive output interface (231) is arranged on the first output isolation bracket (24), and the first negative output interface (232) is arranged on the second output isolation bracket (25).

11. The battery module according to claim 8, characterized in that: The first battery module (10) further comprises a first signal acquisition unit (16), the first signal acquisition unit (16) being arranged on the first integrated busbar (13); the second battery module (20) further comprises a second signal acquisition unit (26), the second signal acquisition unit (26) being arranged on the second integrated busbar (23), and the second signal acquisition unit (26) being electrically connected to the first signal acquisition unit (16).

12. The battery module according to claim 11, characterized in that: One end of the first signal acquisition unit (16) close to the second signal acquisition unit (26) is provided with a first signal input interface (161); one end of the second signal acquisition unit (26) close to the first signal acquisition unit (16) is provided with a first signal output interface (261); the first signal output interface (261) is extended in the direction of the first signal input interface (161) and is electrically connected to the first signal input interface (161).

13. The battery module according to claim 12, characterized in that: The first integrated busbar (13) is further provided with a limiting column (135), and the limiting column (135) is located on a side of the first signal input interface (161) close to the first signal output interface (261); the first signal output interface (261) is provided with a limiting hole (2611), and the limiting hole (2611) cooperates with the limiting column (135).

14. The battery module according to claim 12, characterized in that: The extended portion of the first signal output interface (261) is provided with a first redundant buffer structure (2612).

15. The battery module according to claim 8, characterized in that: The inter-module busbar (60) is provided with a second redundant buffer structure (61).

16. A battery pack, characterized in that: The invention comprises a lower box body (200) and a battery module (100) as claimed in any one of claims 1 to 15, wherein the first end plate (12), the first battery group (11), the middle end plate (30), the second battery group (21) and the second end plate (22) are all arranged in the lower box body (200).

17. The battery pack according to claim 16, characterized in that: The lower box body (200) is provided with a first crossbeam (210), a middle crossbeam (220) and a second crossbeam (230), wherein the first crossbeam (210), the middle crossbeam (220) and the second crossbeam (230) are arranged at intervals; the first battery group (11) is arranged between the first crossbeam (210) and the middle crossbeam (220), and the second battery group (21) is arranged between the second crossbeam (230) and the middle crossbeam (220); the first end plate (12) is connected to the first crossbeam (210), the middle end plate (30) is connected to the middle crossbeam (220), and the second end plate (22) is connected to the second crossbeam (230).

18. A new energy vehicle, characterized in that: Includes the battery pack (1100) as described in claim 16 or 17.

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