CN219779097U - Combined end plate, battery module and battery pack - Google Patents

Abstract

The application provides a combined end plate, a battery module and a battery pack, wherein the combined end plate comprises a first end plate structure, a second end plate structure and a fastener, a first assembly part is arranged on the first end plate structure, the second end plate structure is arranged adjacent to the first end plate structure, and a second assembly part positioned at the first assembly part is arranged on the second end plate structure; the fastener connects the second fitting portion and the first fitting portion to secure adjacent second end plate structures and first end plate structures. Then adjacent first end plate structure and second end plate structure can use one set of fastener to connect fixedly, can make the assembly between every two battery modules practice thrift two sets of fasteners, have cancelled the use of the fixed bolster that is used for fixing between the end plate simultaneously, reduced the manufacturing cost of battery package, also simplified assembly flow simultaneously.

Description

Combined end plate, battery module and battery pack

Technical Field

The application belongs to the technical field of batteries, and particularly relates to a combined end plate, a battery module and a battery pack.

Background

The battery module is a structural bridge between the batteries and the battery pack. A battery pack is typically constructed of a plurality of modules. The module end plate is used as an indispensable part of the battery module, and the cooperation of the module end plate and the side panel can provide the fixation of the battery module.

Generally, when the battery pack includes at least two battery modules, the module end plates on both sides of each battery module are required to be fixed with the box body by adopting the mounting bolts alone, and meanwhile, the module end plates of two adjacent battery modules are required to be connected and fixed with each other, so that the overall strength and rigidity of the battery pack are improved, the manufacturing cost of the battery pack is increased, and the assembly process is complex.

The statements made above merely serve to provide background information related to the present disclosure and may not necessarily constitute prior art.

Disclosure of Invention

In view of the above problems, an object of the embodiments of the present utility model is to provide a combined end plate, a battery module and a battery pack, so as to solve the technical problems of high manufacturing cost and complex assembly process of the battery pack in the prior art.

In a first aspect, the present utility model provides a composite end plate comprising: the first end plate structure is provided with a first assembly part, the second end plate structure is arranged adjacent to the first end plate structure, and the second end plate structure is provided with a second assembly part positioned at the first assembly part; the fastener connects the second fitting portion and the first fitting portion to secure adjacent second end plate structures and first end plate structures.

In the technical scheme of the embodiment of the application, the combined end plate is assembled on the battery pack box body with at least two battery modules, and then the two ends of one of the two adjacent battery modules are respectively provided with the first end plate structure, the two ends of the other adjacent battery module are respectively provided with the second end plate structure, the first end plate structure and the second end plate structure are positioned and installed through the first assembling part and the second assembling part, so that the positioning is more convenient, the installation time is saved, the first end plate structure and the second end plate structure are positioned through the first assembling part and the second assembling part, the second assembling part and the first assembling part are connected through one set of fasteners to fix the adjacent second end plate structure and the first end plate structure, so that after the first end plate structure and the second end plate structure are fixedly connected through the same fastener, the two adjacent end plates can be firmly connected on the battery pack box body without using a fixed bracket to be connected between the two end plates, the number of the two adjacent end plates is reduced through the first end plate structure and the second assembling part, and the number of the fixed bracket is also reduced through the fasteners which are used for fixing the two end plates.

In some embodiments, the first fitting is disposed on a side of the first end plate structure adjacent to the second end plate structure and the second fitting is disposed on a side of the second end plate structure adjacent to the first end plate structure.

Thus, the first end plate structure and the second end plate structure can be positioned and assembled at the adjacent sides through the first assembling part and the second assembling part.

In some embodiments, the first fitting portion is disposed on one or opposite sides of the first end plate structure. The second fitting portion is disposed on one side or on opposite sides of the second end plate structure.

When the first assembly part is disposed at one side of the first end plate structure, the first assembly part is disposed only at the adjacent sides of the first end plate structure and the second end plate structure, and the first end plate structure of the shape is available for mounting on the battery module located at the outermost side. When the first assembly parts are arranged on two opposite sides of the first end plate structure, at this time, the first assembly parts are arranged on two side edges of the first end plate structure, and the first end plate structure in the shape is used for being installed on the battery module located in the middle. When the second fitting part is provided at one side of the second end plate structure, at this time, the second fitting part is provided only at the adjacent side of the second end plate structure to the first end plate structure, and the shaped second end plate structure may be used for mounting on the battery module located at the outermost side. When the second assembly portion sets up in the both sides that second end plate structure is relative, at this moment, all be equipped with second assembly portion at the both sides limit of second end plate structure, the second end plate structure of this shape can be used to install on the battery module that is located the middle part position to can carry out arbitrary combination assembly to the combination end plate according to the quantity of battery module.

In some embodiments, the first fitting portion includes a recess structure recessed from one side of the first end plate structure toward the opposite side of the first end plate structure; the second assembly part comprises a boss structure matched with the concave table structure of the first assembly part, and the boss structure is formed in a convex manner on one side edge of the second end plate structure towards the other side edge opposite to the second end plate structure.

The first assembly part is a concave table structure formed by inwards sinking the side edge of the first end plate structure, processing is convenient, the second assembly part is a boss structure formed by outwards extending the side edge of the second end plate structure, processing is convenient, and meanwhile, the assembly is convenient to position mutually through the concave table structure and the boss structure, so that assembly time is saved.

In some embodiments, the recess structure includes a first mating surface and a second mating surface, and the boss structure includes a third mating surface and a fourth mating surface, wherein the first mating surface is cooperatively positioned with the third mating surface, and the second mating surface is cooperatively positioned with the fourth mating surface.

Therefore, the second assembly part can be positioned at the first assembly part by utilizing the matched positioning of the first assembly surface and the third assembly surface and the matched positioning of the second assembly surface and the fourth assembly surface, so that the assembly of the second end plate structure and the first end plate structure is realized. In some embodiments, the first assembly portion further includes a first mounting hole communicating the first assembly face with an end face of the first end plate structure along a first direction, the second assembly portion is provided with a second mounting hole at a position corresponding to the first mounting hole, and the second mounting hole communicates the third assembly face with an end face of the second assembly portion along the first direction, such that the fastener passes through the second mounting hole and the first mounting hole to fixedly connect the adjacent second end plate structure with the first end plate structure.

In this manner, a set of fasteners may be employed to sequentially pass through the second mounting holes and the first mounting holes to secure adjacent second end plate structure and first end plate structure to the battery pack case. After the same set of fasteners are adopted to fixedly connect the adjacent first end plate structure and the adjacent second end plate structure to the battery pack box body, the adjacent two end plates can be stably fixed on the battery pack box body without using a fixing support to connect the two end plates, the fixing support structure between the adjacent end plates and the fasteners for the fixing support can be canceled, and the production cost is reduced. In some embodiments, the first assembly portion is provided with a first positioning structure, and the second assembly portion is provided with a second positioning structure, and the first positioning structure cooperates with the second positioning structure to position the second assembly portion at the first assembly portion.

So, when the assembly, can be directly through first location structure and second location structure's cooperation make first assembly portion and second assembly portion fix a position fast to fix a position installation with second end plate structure and first end plate structure, can practice thrift the installation man-hour.

In some embodiments, the first positioning structure is a positioning protrusion disposed on the first assembling surface, and the second positioning structure is a positioning groove disposed on the third assembling surface.

So, when the installation, the positioning groove is through pegging graft in the bellied mode of location for third fitting surface and first fitting surface and fourth fitting surface and second fitting surface accomplish the location, and first mounting hole and second mounting hole also can align the setting simultaneously, realize the quick location assembly between first end plate structure and the second end plate structure, can practice thrift the installation man-hour. In some embodiments, the lateral outer edges of the first end plate structure or the second end plate structure are provided with first rounded structures.

So, after two adjacent first end plate structures and second end plate structure fixed connection, because the side outward flange of adjacent first end plate structure and second end plate structure all is equipped with first fillet structure, then can form the structure of stepping down by two adjacent first fillet structures in the contact surface outside of first end plate structure and second end plate structure, this structure of stepping down can carry out spacingly to the side of panel, makes things convenient for the connection installation of end plate and side board.

In some embodiments, a second rounded structure is provided at an outer edge of the second or fourth mounting surface.

In this way, the appearance of the first end plate structure and the second end plate structure can be made uniform. In some embodiments, both sides of the first end plate structure and both sides of the second end plate structure are provided with limiting grooves for limiting the fixing strap.

Therefore, the limiting groove can be used for limiting and fixing the fixing belt of the battery module. In some embodiments, a third rounded corner structure is provided at the outer edge of the side edge of the limiting groove.

Therefore, the damage of the tightening force of the fixing belt on the outer edge of the side edge of the end plate structure when the battery module is bound can be reduced, and the service lives of the whole battery module and the battery pack are prolonged.

In a second aspect, the present application provides a battery module, including a module assembly and the above-mentioned composite end plate, the composite end plate being mounted on the module assembly.

In a third aspect, the application provides a battery pack, which comprises a battery pack box body and the battery module.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a first perspective view of a combined end plate according to an embodiment of the present application;

fig. 2 is a schematic perspective view of a first end plate structure according to an embodiment of the present application;

FIG. 3 is a schematic front view of the first end plate structure of FIG. 2;

FIG. 4 is a schematic top view of the first end plate structure shown in FIG. 2;

FIG. 5 is a schematic bottom view of the first end plate structure of FIG. 2;

fig. 6 is a schematic perspective view of a first end plate structure according to an embodiment of the present application;

FIG. 7 is a schematic front view of the first end plate structure of FIG. 6;

FIG. 8 is a schematic top view of the first end plate structure of FIG. 6;

FIG. 9 is a schematic bottom view of the first end plate structure of FIG. 6;

fig. 10 is a schematic perspective view of a second end plate structure according to an embodiment of the present application;

FIG. 11 is a schematic front view of the second endplate structure of FIG. 10;

FIG. 12 is a schematic top view of the second end plate structure of FIG. 10;

FIG. 13 is a schematic bottom view of the second endplate structure of FIG. 10;

fig. 14 is a schematic perspective view of a second end plate structure according to an embodiment of the present application;

FIG. 15 is a schematic front view of the second endplate structure of FIG. 14;

FIG. 16 is a schematic top view of the second end plate structure of FIG. 14;

FIG. 17 is a schematic bottom view of the second endplate structure of FIG. 14;

FIG. 18 is a second perspective view of a combined end plate according to an embodiment of the present application;

fig. 19 is a third perspective view of the combined end plate according to the embodiment of the present application;

fig. 20 is a perspective view of a battery pack case according to an embodiment of the present application.

Wherein, each reference sign in the figure: 100-a first end plate structure; 101-a first fitting part; 102-a limit groove; 103-a third rounded corner structure; 104-a third mounting hole; 105-a first rounded corner structure; 106-a second rounded corner structure; 107-lightening holes; 108-a groove type abdication structure; 1010-a first mounting face; 1011-a second mounting face; 1012-a first mounting hole; 1013-a first positioning structure; 200-a second endplate structure; 201-a second fitting part; 204-fourth mounting holes; 2010-a third mating face; 2011-a fourth mating face; 2012-a second mounting hole; 2013-a second positioning structure; 300-fasteners; 400-battery pack case; 500-fixing band.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The new energy automobile generally adopts a battery pack as an energy component, a battery module is a core component of the battery pack, and the battery module is an intermediate energy storage monomer between a battery monomer and the battery pack. The battery pack comprises a few battery modules and a plurality of battery modules, and the tiny change of the cost of the battery modules is amplified by the quantity, so that the cost of the battery pack is greatly influenced. The battery pack is formed by fixedly installing a plurality of battery modules in a battery pack box body side by side. However, when at least two battery modules are provided in the battery pack case, both end plates provided along the length direction of each battery module are fixed to the battery pack case by using the bolt lock assembly. For each battery module, 4 sets of bolt locking assemblies are required to fix the respective end plates to the battery pack case. Meanwhile, in order to provide the overall strength and rigidity of the battery pack, two adjacent battery modules are also required to be connected and fixed with each other. In general, in order to achieve connection fixation between adjacent two battery modules, adjacent end plates of the adjacent two battery modules are mainly connected by additional fixing brackets, such as sheet metal brackets. The sheet metal support needs to be produced by developing a die, so that the production cost is increased, the assembly time of the battery pack and the weight of the battery pack are increased, and the production cost of the battery pack is increased due to the fact that the bolt locking assembly with a large number of fixed end plates and the locking structure of the sheet metal support are also increased.

The battery module disclosed in the embodiment of the application generally comprises a bottom plate, an upper cover, two end plates, two side plates, a plurality of battery cells and fixing belts, wherein the bottom plate, the upper cover, the two end plates and the two side plates are respectively assembled at the bottom, the upper part, the two ends in the length direction and the two sides in the width direction of the plurality of battery cells, and the plurality of battery cells are bundled by extending from one end plate to the other end plate by the fixing belts, so that the plurality of battery cells are combined together to form the battery module. The fixing strap disclosed in the embodiment of the application refers to a component for bundling and assembling a plurality of battery cells in a single battery module. Can be a steel belt, a flame retardant belt or a PAT plastic steel belt.

The end plate of the battery module disclosed by the embodiment of the application is generally made of an aluminum alloy section bar, can be matched with the side plate, prevents the battery module from being scattered when the battery cells expand, and provides a fixing mode of the battery module.

The combined end plate provided by the application is used for the battery module and is matched with the side panel and the fixing belt of the battery module.

Based on this, the embodiment of the application provides a combined end plate, and the combined end plate provided by the embodiment of the application is described with reference to the accompanying drawings.

In some embodiments, referring to fig. 1, a combined end plate according to an embodiment of the present application includes: the first end plate structure 100, the second end plate structure 200 and the fastener 300, wherein the first end plate structure 100 is provided with a first assembling part 101, the second end plate structure 200 is arranged adjacent to the first end plate structure 100, and the second end plate structure 200 is provided with a second assembling part 201 positioned at the first assembling part 101; the fastener 300 connects the first fitting portion 101 and the second fitting portion 201 to secure adjacent first end plate structure 100 and second end plate structure 200.

The first end plate structure 100 and the second end plate structure 200 may be members fixed at both ends of the battery module in the length direction of the single battery module, for fixing a plurality of serial-parallel battery cells inside the single battery module. The first fitting portion 101 refers to a structural portion provided on the first end plate structure 100 for fitting and fixing with an adjacent end plate. The second fitting portion 201 refers to a structural portion provided on the second end plate structure for fitting and fixing with an adjacent end plate. In the embodiment of the application, the positioning is to realize the determination of the position relationship by contact.

The combined end plate according to the embodiment of the application is assembled on a battery pack case having at least two battery modules, one of the two adjacent battery modules is provided with a first end plate structure 100, then the other adjacent battery module is provided with a second end plate structure 200, the first end plate structure 100 and the second end plate structure 200 are positioned and installed by a first assembling portion 101 and a second assembling portion 201, and after the first assembling portion 101 and the second assembling portion 201 are positioned, the second assembling portion 201 and the first assembling portion 101 are connected by connecting the adjacent first end plate structure 100 and the second end plate structure 200 by using a set of fasteners such as a bolt-lock assembly to connect and fix the adjacent second end plate structure 200 and the first end plate structure 100. The combined end plate of the application can provide the connecting sites of the first end plate structure 100 and the second end plate structure 200 through the matching of the first assembling part 101 and the second assembling part 201, so that two sets of fasteners are saved in the assembling between every two battery modules, for example, only 6 sets of fasteners are needed for the two sets of battery modules (the prior end plate structure needs to fix the end plate and the battery pack box body by adopting 8 sets of fasteners for the fixing of the two battery modules and fix the adjacent end plate by adopting a fixing bracket between the adjacent end plates), the fixing bracket between the two end plates does not need to be used any more to be connected between the two end plates, and the fixing bracket for the fixing between the modules can be omitted, thereby reducing the use quantity of the fasteners, reducing the production and manufacturing cost of the battery pack and simplifying the assembling flow.

The combined end plate can be suitable for a battery pack provided with at least two battery modules, for example, 2 battery modules, 3 battery modules or 4 battery modules can be arranged in a battery pack box body and used for realizing connection and fixation of end plates between two adjacent battery modules and fixation between the end plates of the two adjacent battery modules and the battery pack box body.

Referring to fig. 2-3 or fig. 6 and 7, in some embodiments, the first fitting portion 101 is disposed on a side of the first endplate structure 100 adjacent to the second endplate structure 200. Referring to fig. 10 and 11 or fig. 14 and 15, the second fitting portion 201 is disposed on a side of the second end plate structure 200 adjacent to the first end plate structure 100.

It is understood that the side edges of the end plate structure refer to the edges of the end plate structure that are in contact with the adjacent end plate when the end plate structure is installed. In the embodiment of the present application, the first assembling portion 101 and the second assembling portion 201 are respectively disposed on the adjacent side edges of the first end plate structure 100 and the second end plate structure 200, so that positioning and assembling can be more conveniently performed through the adjacent first assembling portion 101 and second assembling portion 201.

In some embodiments, the first fitting 101 is disposed on one or both opposite sides of the first endplate structure 100 and the second fitting 201 is disposed on one or both opposite sides of the second endplate structure 200.

For example: as shown in fig. 2-5, in some embodiments, the first mounting portion 101 may be disposed on one side of the first end plate structure 100. It will be appreciated that: for the first end plate structure 100 mounted on the outermost battery module, only one side needs to be assembled with the end plate of the adjacent battery module, and then the first assembly part 101 may be provided only at the adjacent sides of the first end plate structure 100 and the second end plate structure 200, and the shaped first end plate structure 100 may be used to be mounted on the battery module located at the outermost side. The outermost battery module refers to a single battery module located at the outermost edge along a direction perpendicular to the length of the battery module.

Referring to fig. 6-9, in some embodiments, the first fitting portion 101 may be disposed on opposite sides of the first end plate structure 100. It will be appreciated that: for the end plates mounted on the battery module at the middle position (not at the extreme edge position), both side edges are required to be assembled with the end plates of the adjacent battery modules, and then the opposite sides of the first end plate structure 100 in this embodiment are provided with the first assembling parts 101 assembled with the second end plate structure 200 such that the shaped first end plate structure 100 is available for mounting on the battery module at the middle position.

As shown in fig. 10-13, in some embodiments, the second fitting portion 201 may be disposed on one side of the second endplate structure 200. It will be appreciated that: for the end plate mounted on the outermost battery module, only one side needs to be assembled with the first end plate structure of the adjacent battery module, then the second end plate structure 200 in this embodiment may be provided with the second assembly part 201 only at one side adjacent to the first end plate structure 100, so that the shaped second end plate structure 200 may be used for mounting on the battery module located at the outer side.

Referring to fig. 14-17, in some embodiments, the second fitting portion 201 may be disposed on opposite sides of the second end plate structure 200. It will be appreciated that: for the end plates mounted on the battery module at the middle position (not at the extreme edge position), both opposite sides thereof are required to be assembled with the end plates of the adjacent battery module, and therefore, in this embodiment, both opposite sides of the second end plate structure 200 are provided with the second assembling parts 201 assembled with the first end plate structure 100, so that the shaped second end plate structure 200 can be used to be mounted on the battery module at the middle position. Furthermore, in the assembly process, the end plate structures with different shapes can be assembled in any combination based on the number of the battery modules.

In some embodiments, referring to fig. 2 and 3 or fig. 6 and 7, the first fitting portion 101 includes a recess structure formed in one side of the first end plate structure 100 toward the other opposite side of the first end plate structure 100. Referring to fig. 10 and 11 or fig. 14 and 15, the second assembling portion 201 includes a boss structure matching with the concave structure of the first assembling portion 101, and the boss structure is formed to protrude toward the opposite side away from the second end plate structure 200 at one side of the second end plate structure 200.

The other side of the end plate structure disclosed in the embodiment of the application refers to the other side parallel and opposite to the side provided with the concave platform structure or the convex platform structure.

The concave structure of the first fitting part 101 or the convex structure of the second fitting part 201 may be formed as a part of the first end plate structure 100 or the second end plate structure 200 without additional parts, and the concave structure or the convex structure is formed on the first end plate structure 100 or the second end plate structure 200 while the first end plate structure 100 or the second end plate structure 200 is processed, which is convenient to process. The positioning of the first assembly part 101 and the second assembly part 201 can realize rapid positioning and assembly through the cooperation of the concave table structure and the convex table structure, and the installation time is saved.

Referring to fig. 2 and 3 or fig. 6 and 7, the concave stage structure includes a first assembling surface 1010 and a second assembling surface 1011, and referring to fig. 10 and 11 or fig. 14 and 15, the convex stage structure includes a third assembling surface 2010 and a fourth assembling surface 2011, wherein the first assembling surface 1010 is positioned in cooperation with the third assembling surface 2010, and the second assembling surface 1011 is positioned in cooperation with the fourth assembling surface 2011.

In this way, the concave structure and the convex structure can be mounted in a matched manner by using the matched positioning of the first assembling surface 1010 and the third assembling surface 2010 and the matched positioning of the second assembling surface 1011 and the fourth assembling surface 2011, so that the second assembling portion 201 is positioned at the first assembling portion 101.

Wherein the first fitting surface 1010 and the second fitting surface 1011 are fitting surfaces of the first fitting portion 101 of the first end plate structure 100 when positioned with the second fitting portion 201 of the second end plate structure 200, respectively. The third mount surface 2010 and the fourth mount surface 2011 are the mating surfaces of the second mount portion 201 when positioned with the first mount portion 101, respectively.

In some embodiments, the second mounting face 1011 is disposed perpendicular to the first mounting face 1010. It will be appreciated that the first mounting surface 1010 and the second mounting surface 1011 being disposed vertically means that the angle between the first mounting surface 1010 and the second mounting surface 1011 may be 90 °, but some tolerance is allowed. In some embodiments, the fourth mounting surface 2011 is perpendicular to the third mounting surface 2010. It will be appreciated that the angle of the fourth mounting surface 2011 to the third mounting surface 2010 may be 90, but some tolerance is allowed.

In some embodiments, the length and width of the third mounting surface 2010 are consistent with the length and width of the first mounting surface 1010, and the width and height of the fourth mounting surface 2011 are consistent with the width and height of the second mounting surface 1011, such that the second mounting portion 201 and the first mounting portion 101 are mounted using the mating mounting of the third mounting surface 2010 and the fourth mounting surface 2011 with the first mounting surface 1010 and the second mounting surface 1011, respectively.

Referring to fig. 4 and 5 or fig. 8 and 9, the first mounting portion 101 further includes a first mounting hole 1012, the first mounting hole 1012 communicating the first mounting face 1010 and an end face of the first end plate structure 100 in a first direction. Referring to fig. 12 and 13 or fig. 16 and 17, the second mounting portion 201 is provided with a second mounting hole 2012 at a position corresponding to the first mounting hole 1012, and the second mounting hole 2012 communicates with the third mounting surface 2010 and an end surface of the second mounting portion 201 in the first direction, so that the fastener 300 passes through the second mounting hole 2012 and the first mounting hole 1012 to fixedly connect the adjacent second end plate structure 200 and first end plate structure 100.

Wherein the first direction refers to the direction of extension of the fastener that mounts the first end plate structure to the battery pack case. The end face of the first end plate refers to the end face of the first end plate structure 100 that is distal from the first mounting face 1010 in a first direction such that a first mounting hole 1012 extends through the interior of the first end plate structure 100 for securing the first end plate structure 100 to the battery pack case using a fastener, such as a bolt lock assembly, through the first mounting hole 1012. The end surface of the second fitting portion 201 refers to an end surface of the second fitting portion 201 that is distant from the third fitting surface 2010 in the first direction such that the second mounting hole 2012 penetrates the second fitting portion 201. The second mounting holes 2012 can be aligned with the first mounting holes 1012 such that the same set of fasteners can simultaneously penetrate the second mounting holes 2012 and the first mounting holes 1012 aligned therewith, thereby achieving the fixation of adjacent first and second end plate structures 100, 200 using the same set of fasteners. Adjacent two end plates can be firmly fixed on the battery pack box body, the fixing support is not required to be used again to be connected between the two end plates, the fixing support structure between the adjacent end plates and the fastener used for the fixing support can be canceled, and the production cost is reduced.

In some embodiments, the first fitting part 101 is provided with a first positioning structure 1013, and the second fitting part 201 is provided with a second positioning structure 2013, and the first positioning structure 1013 cooperates with the second positioning structure 2013 to position the second fitting part 201 at the first fitting part 101.

In the embodiment of the present application, the first positioning structure 1013 and the second positioning structure 2013 cooperate to enable the first assembly portion 101 and the second assembly portion 201 to be positioned quickly, and not only can the first assembly surface 1010 and the second assembly surface 1011 be assembled with the third assembly surface 2010 and the fourth assembly surface 2011 respectively through the first positioning structure 1013 and the second positioning structure 2013, but also the first mounting hole 1012 of the first assembly portion 101 and the second mounting hole 2012 of the second assembly portion 201 can be aligned, so that the mounting time can be saved.

In some embodiments, the first positioning structure 1013 is a positioning protrusion disposed on the first assembling surface 1010, and the second positioning structure 2013 is a positioning groove disposed on the third assembling surface 2010.

In some embodiments, the first positioning structure 1013 may be disposed on the first mounting face 1010 around the opening of the first mounting hole 1012, and the first positioning structure 1013 does not affect the fastener 300 penetrating the first mounting hole 1012. In some embodiments, the second locating structure 2013 may be disposed on the third mounting face 2010 around the opening of the second mounting hole 2012 without affecting the passage of the fastener 300 through the second mounting hole 2012.

The positioning protrusion can be cylindrical, square or stepped truncated cone and the like. The shape of the positioning groove is matched with the positioning protrusion so that the positioning groove can be inserted and positioned with the positioning protrusion. For example, when the positioning projection is cylindrical, the positioning groove may be a cylindrical groove; when the positioning protrusion is square, the positioning groove may be a square groove; when the positioning bulge is a step-shaped circular table, the positioning groove can be a step-shaped groove matched with the positioning bulge.

During installation, the positioning grooves are inserted into the positioning protrusions, so that the third assembly surface 2010, the first assembly surface 1010, the fourth assembly surface 2011 and the second assembly surface 1011 are positioned, and meanwhile, the first mounting holes 1012 and the second mounting holes 2012 can be aligned, so that quick positioning assembly between the first end plate structure 100 and the second end plate structure 200 is realized, and the installation time can be saved.

In some embodiments, only one side of the first end plate structure mounted on the outermost battery module needs to be assembled with the second end plate structure of the adjacent battery module, and therefore, the first assembling part 101 is provided at the adjacent side thereof to the adjacent second end plate structure 200, and the first assembling part 101 may not be provided at the other side opposite to the first assembling part 101, so as to ensure the regularity of the overall external envelope of the battery module. Referring to fig. 2 to 5, in some embodiments, a third mounting hole 104 is provided in the first end plate structure 100 along the other side opposite to the first mounting portion 101 in a direction parallel to the first direction, the third mounting hole 104 may be designed as a conventional through hole structure, and the third mounting hole 104 is used for a fastener to pass through, so that the outermost end plate is fixed to the battery pack case body by using the fastener 300 through the third mounting hole 104.

In some embodiments, for the second end plate structure mounted on the outermost battery module, only one side needs to be assembled with the first end plate structure of the adjacent battery module, and therefore, the second assembly part 201 is provided at the adjacent side of the adjacent first end plate structure, and the second assembly part 201 may not be provided at the other side opposite to the second assembly part 201, so as to ensure the regularity of the overall external envelope of the battery module. Referring to fig. 10 to 13, the second end plate structure 200 is further provided with a fourth mounting hole 204 on the other side opposite to the second mounting portion 201 in a direction parallel to the first direction, the fourth mounting hole 204 is penetrated by a fastening member, and the fourth mounting hole 204 may be designed as a conventional through hole structure so as to fix the outermost end plate with the battery pack case 400 by penetrating the fourth mounting hole 204 by the fastening member 300.

Referring to fig. 2-17, in some embodiments, the lateral outer edges of the first end plate structure 100 or the second end plate structure 200 are provided with first rounded structures 105.

In the embodiment of the application, the round corner structure is an arc corner protruding outwards.

After two adjacent first end plate structures 100 and second end plate structures 200 are fixedly connected, because the outer edges of the side edges of the two adjacent first end plate structures 100 and second end plate structures 200 are respectively provided with a first round corner structure 105, the outer sides of the contact surfaces of the first end plate structures 100 and the second end plate structures 200 can be provided with groove-shaped abdicating structures 108 by two adjacent first round corner structures 105, the groove-shaped abdicating structures 108 are structures which are concave in the direction of the end plate body, the opening of the groove-shaped abdicating structures is outwards, the side edges of the side panels can be limited, and the connection of the end plates and the side panels is facilitated.

In some embodiments, a second rounded structure 106 is provided at the outer edge of the second mounting surface 1011 or the fourth mounting surface 2011. In this way, the first end plate structure 100 or the second end plate structure 200 can be made to face the battery cell and face the battery cell in a consistent shape, and when the end plate structures with different shapes are selected according to the battery modules with different numbers, the first end plate structure or the second end plate structure can be arranged to face the battery cell, so that the applicability is stronger.

Referring to fig. 2-17, in some embodiments, two sides of the first endplate structure 100 and two sides of the second endplate structure are each provided with a limiting groove 102 for limiting the securing strap 500.

The limiting grooves 102 are structures formed by concavely forming the end plate bodies from the sides of the first end plate structure 100 or the second end plate structure 200, and are used for giving way to fixing bands for bundling a plurality of battery cells in the battery module, so that the fixing bands 500 are limited between the limiting grooves 102 of the two first end plate structures 100 or the two second end plate structures 200 positioned at the two ends of the length direction of the battery module, bundling and fixing of a plurality of battery cells inside is realized through the fixing bands 500, the fixing bands 500 are limited in the limiting grooves 102 of the end plate structures, giving way to the fixing bands on the end plate structures, and then the assembly of the adjacent sides of the adjacent end plate structures can be tightly matched to realize assembly and fixing.

In some embodiments, a third rounded structure 103 is provided at the lateral outer edge of the limiting groove 102.

The third fillet structure 103 is an outwards protruding fillet, so that the damage to the outer edge of the side edge of the end plate structure caused by the tightening force of the fixing strap when the battery module is bound can be reduced, and the service lives of the whole battery module and the battery pack are prolonged.

The structure of the composite end plate is illustrated below:

referring to fig. 1, fig. 1 is a schematic perspective view of a combined end plate according to one or more embodiments of the present application, in which the combined end plate is assembled by a first end plate structure 100 having a single-sided first assembling portion 101 and a second end plate structure 200 having a single-sided second assembling portion 201. The combined end plate of the embodiment is suitable for the situation that two battery modules are arranged in a battery pack box body.

In the composite end plate of this embodiment, the single-sided first fitting portion 101 of the first end plate structure 100 and the single-sided second fitting portion 201 of the second end plate structure 200 cooperate with each other to achieve positioning fitting. That is, the first mounting surface 1010 of the first mounting portion 101 is mounted to the third mounting surface 2010 of the second mounting portion 201, the second mounting surface 1011 of the first mounting portion 101 is mounted to the fourth mounting surface 2011 of the second mounting portion 201, and at the time of mounting, the first positioning structure 1013 of the first mounting portion 101 is inserted into the second positioning structure 2013 of the second mounting portion 201, and at this time, the first mounting hole 1012 of the first mounting portion 101 may be aligned with the second mounting hole 2012 of the second mounting portion 201. The combined end plate is then secured to the battery pack case using a set of fasteners 300 that pass through the second mounting holes 2012 of the second fitting portion 201 and the first mounting holes 1012 of the first fitting portion 101 and extend the ends of the fasteners 300 to the battery pack case.

Referring to fig. 1, in this embodiment, the first end plate structure 100 is provided with the third mounting hole 104 at one side thereof, where the first mounting portion 101 is not provided, and then is fixed to the battery pack case by passing the other fastening member 300 through the third mounting hole 104 with the end of the fastening member 300 extended to the mounting beam of the battery pack case, and the second end plate structure 200 is provided with the fourth mounting hole 204 at one side thereof, where the second mounting portion 201 is not provided, and then is fixed to the battery pack case by passing the other fastening member 300 through the fourth mounting hole 204 with the end of the fastening member 300 extended to the battery pack case, and in this embodiment, the fastening member 300 may be a bolt-locking assembly.

Therefore, for the combined end plate of the embodiment, the two battery modules adopting the combined end plate of the application can only need 6 sets of fasteners to fix the end plate structure, compared with the end plate structure in the prior art, 8 sets of fasteners are needed, and meanwhile, the fixing support such as the sheet metal support is needed to connect and fix the adjacent end plate structure.

Referring to fig. 18, fig. 18 is a schematic perspective view of a combined end plate according to another or more embodiments of the present application, in which the combined end plate is assembled by a first end plate structure 100 having first assembling portions 101 at two sides and two second end plate structures 200 having second assembling portions 201 at one side. The combined end plate of the embodiment is suitable for the situation that three battery modules are arranged in a battery pack box body.

In the composite end plate of this embodiment, the first end plate structure 100 has the first fitting portions 101 on both sides thereof, and the first fitting portions 101 on both sides of the first end plate structure 100 are fitted with the second end plate structure 200 having the single-sided second fitting portions 201 to achieve positioning fitting. That is, the first fitting surfaces 1010 of the two first fitting parts 101 are each mounted to the third fitting surface 2010 of the second fitting part 201 of the second end plate structure 200 adjacent thereto, the second fitting surfaces 1011 of the first fitting parts 101 are mounted to the fourth fitting surface 2011 of the second fitting part 201, and at the time of fitting, the first positioning structures 1013 of the first fitting parts 101 are inserted into the second positioning structures 2013 of the second fitting parts 201, and at this time, the first mounting holes 1012 of the first fitting parts 101 may be aligned with the second mounting holes 2012 of the second fitting parts. Then, at the assembly of the first assembly part 101 and the second assembly part 201, a set of fasteners 300 is used to pass through the second mounting holes 2012 of the second assembly part 201 and the first mounting holes 1012 of the first assembly part 101 and extend the ends of the fasteners 300 to the mounting beams of the battery pack case, and the adjacent end plates are fixed to the battery pack case.

Accordingly, the combined end plate and the battery pack case can be fixed at the assembly of the first end plate structure 100 and the second end plate structure 200 by a set of fasteners 300 through the second mounting holes 2012 of the second assembly portion 201 and the first mounting holes 1012 of the first assembly portion 101, and in this embodiment, two second end plate structures 200 having the second assembly portion 201 on one side are disposed at the outermost side, on both sides of the first end plate structure 100, and the first end plate structure 100 having the first assembly portion 101 on the opposite sides is disposed at the middle position. And the second end plate structure 200 is respectively penetrated through the fourth mounting holes 204 by another fastening piece 300 at one side far from the second assembling part 201, and the end parts of the fastening pieces 300 are extended to the mounting beams of the battery pack box body, so that the battery pack box body is fixed. In this embodiment, the fastener 300 may be a bolt lock assembly.

Therefore, for the combined end plate of the embodiment, 3 battery modules adopting the combined end plate of the application can only need 8 sets of fasteners to fix the end plate structure, compared with the end plate structure in the prior art, 12 sets of fasteners are needed, and meanwhile, a fixing support such as a sheet metal bracket is needed to fix the adjacent end plate structure.

Referring to fig. 19, fig. 19 is a schematic perspective view of a combined end plate according to another or more embodiments of the present application, in which a middle position of the combined end plate is assembled by a first end plate structure 100 having a first assembling portion 101 at both sides and a second end plate structure 200 having a second assembling portion 201 at both sides, and a first end plate structure 100 having a first assembling portion 101 at one side and a second end plate structure 200 having a second assembling portion 201 at one side are respectively assembled at the outermost sides. The combined end plate of the embodiment is suitable for the situation that four battery modules are arranged in a battery pack box body. In this embodiment, the first fitting portion 101 of the first end plate structure 100 located at the outermost side is a concave table structure, and the first fitting portion 101 of the first end plate structure 100 located at the middle position is also a concave table structure. The second fitting portion 201 of the second end plate structure 200 located at the outermost side is a boss structure, and the second fitting portion 201 of the second end plate structure 200 located at the middle position is also a boss structure. The concave structure of each first fitting part 101 is provided with a first fitting surface 1010 and a second fitting surface 1011, and the convex structure of each second fitting part 201 is provided with a third fitting surface 2010 and a fourth fitting surface 2011, and the first fitting surface 1010 of the concave structure is matched and fitted with the third fitting surface 2010 of the convex structure, the second fitting surface 1011 of the concave structure and the fourth fitting surface 2011 of the convex structure.

In this embodiment, the concave stage structure is provided with a first mounting hole 1012, the first mounting hole 1012 vertically communicates the first assembly surface 1010 with the end surface of the first end plate structure 100, the first mounting hole 1012 is provided with a first positioning structure 1013 on the surface of the first assembly surface 1010, and the first positioning structure 1013 is a stepped round stage. The boss structure is provided with a second mounting hole 2012, the second mounting hole 2012 vertically communicates with the end surfaces of the third mounting surface 2010 and the second mounting portion 201, the first mounting hole 1012 and the second mounting hole 2012 can be aligned after the first mounting portion 101 and the second mounting portion 201 are assembled, the second mounting hole 2012 is provided with a second positioning structure 2013 on the surface of the third mounting surface 2010, the second positioning structure 2013 is a step-shaped groove matched with the step-shaped round table, and when the boss structure is mounted, the step-shaped groove is spliced on the step-shaped round table structure, positioning of the first mounting portion 101 and the second mounting portion 201 is achieved, and meanwhile the first mounting hole 1012 and the second mounting hole 2012 can be aligned.

In the composite end plate of this embodiment, at the assembly of each first end plate structure 100 and second end plate structure 200, adjacent end plates and battery pack case can be fixed by a set of fasteners 300 passing through the second mounting holes 2012 of the second assembly portion 201 and the first mounting holes 1012 of the first assembly portion 101 and extending the ends of the fasteners 300 to the mounting beams of the battery pack case. In this embodiment, the fastener 300 employs a bolt lock assembly.

In this embodiment, the side of the first end plate structure 100 located at the outermost side, which is far from the recess structure, is not provided with the recess structure, and the end portion is provided with the third mounting hole 104, and the third mounting hole 104 adopts a conventional through hole structure, and the fastening member 300 passes through the third mounting hole 104 and extends the end portion of the fastening member 300 to the mounting beam of the battery pack case to achieve the fixation with the battery pack case. The second end plate structure 200 located at the outermost side is not provided with a boss structure at a side of the second end plate structure 200 remote from the second assembly portion 201, and is provided with a fourth mounting hole 204 at the end portion, and the fourth mounting hole 204 adopts a conventional through hole structure, and passes through the fourth mounting hole 204 by another fastening member 300 and extends the end portion of the fastening member 300 to the battery pack case, thereby achieving the fixation with the battery pack case. In this embodiment, the fastener 300 is a bolt lock assembly.

Thus, in this embodiment, for 4 battery modules, the fixing of the combined end plate at one end in the length direction of the battery module requires 5 sets of bolt-lock assemblies to fix the combined end plate to the battery pack case, and then a total of 10 bolt-lock assemblies are required at both ends in the length direction of the battery module to achieve the fixation between the end plate and the battery pack case, and no fixing bracket is required between the adjacent end plate structures. The combined end plate provided by the application can only need 10 sets of fasteners, and compared with the end plate structure in the prior art, the use of 6 sets of fasteners is reduced. Meanwhile, the use of a fixing support for connecting adjacent end plate structures can be omitted, the production cost of the battery is reduced, the mounting time is saved, and the weight of the battery module is reduced.

In this embodiment, referring to fig. 19, each of the first end plate structures 100 is provided with a respective one of the limit grooves 102 for limiting the fixing belt 500. Limiting grooves 102 for limiting the fixing belt 500 are respectively provided at both side edges of each second end plate structure 200. The limiting groove 102 of the first end plate structure 100 is disposed opposite to the limiting groove 102 of the second end plate structure 200, that is, the height of the limiting groove 102 disposed on the first end plate structure 100 is consistent with the height of the limiting groove disposed on the second end plate structure 200, so as to ensure the consistency of binding of the steel strips.

In this embodiment, a third rounded structure 103 is provided at the lateral outer edge of the limiting groove 102. The third rounded structure is formed at the inner and outer edges of the limiting groove 102. The lateral outer edges of the first end plate structure 100 or the second end plate structure 200 are provided with first rounded structures 105. The first rounded structures 105 are formed at the outer edges of the inner and outer sides of the first end plate structure 100, and the first rounded structures 105 are formed at the outer edges of the inner and outer sides of the second end plate structure 200. A second rounded structure 106 is provided at the outer edge of the second mounting surface 1011 or the fourth mounting surface 2011.

In this embodiment, the weight reducing holes 107 are provided in the end plate body of the first end plate structure 100 or the end plate body of the second end plate structure 200, the shape of the weight reducing holes 107 is not limited, and the weight reducing holes 107 are provided from the upper side to the lower side of the end plate body to penetrate the end plate body so as to serve the function of reducing the weight of the end plate body.

The application also provides a battery module, which comprises a module assembly and the combined end plate, wherein the combined end plate is arranged on the module assembly.

The module assembly includes bottom plate, upper cover, side board and series-parallel connection's battery monomer, and the combination end plate sets up at battery monomer's length direction's both ends, and the side board sets up in battery monomer's width direction's both sides, and the side of side board is spacing in adjacent first end plate structure's in the combination end plate first fillet structure and second end plate structure first fillet structure formation recess formula structure 108 department of stepping down to with first end plate structure and second end plate structure's contact department fixed connection, for example, through welded connection, bottom plate and upper cover set up respectively in a plurality of battery monomer's bottom and top, in order to assemble the battery module with combination end plate and module assembly.

The present application further provides a battery pack, referring to fig. 20, fig. 20 provides a schematic structural diagram of a battery pack according to one or more embodiments of the present application, including a battery pack case and the battery module, which penetrates through the second assembly part 201 and the first assembly part 101 by means of the fastener 300 to fix the first end plate structure 100 and the second end plate structure 200 of the combined end plate to the battery pack case 400. And at the outermost battery module, the first end plate structure or the second end plate structure is directly fixed to the battery pack case by the fastening members 300.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (14)

1. A composite end plate, comprising: a first end plate structure (100), wherein a first assembly part (101) is arranged on the first end plate structure (100); a second end plate structure (200) disposed adjacent to the first end plate structure (100), the second end plate structure (200) being provided with a second fitting portion (201) positioned at the first fitting portion (101); and a fastener (300), the fastener (300) connecting the first fitting portion (101) and the second fitting portion (201) to secure adjacent first end plate structure (100) and second end plate structure (200).

2. The composite end panel according to claim 1, wherein the first fitting portion (101) is provided on a side of the first end panel structure (100) adjacent to the second end panel structure (200), and the second fitting portion (201) is provided on a side of the second end panel structure (200) adjacent to the first end panel structure (100).

3. The composite end plate according to claim 2, wherein the first fitting part (101) is provided on one side or on opposite sides of the first end plate structure (100) and the second fitting part (201) is provided on one side or on opposite sides of the second end plate structure (200).

4. A composite end plate according to claim 3, wherein the first fitting part (101) comprises a recess formation recessed in one side of the first end plate structure (100) towards the opposite side of the first end plate structure (100); the second assembly part (201) comprises a boss structure matched with the concave platform structure of the first assembly part (101), and the boss structure is formed in a protruding mode on one side edge of the second end plate structure (200) towards the other side edge opposite to the second end plate structure (200).

5. The composite end plate of claim 4, wherein the recess formation comprises a first mating face (1010) and a second mating face (1011), and the boss formation comprises a third mating face (2010) and a fourth mating face (2011), wherein the first mating face (1010) is cooperatively positioned with the third mating face (2010), and the second mating face (1011) is cooperatively positioned with the fourth mating face (2011).

6. The composite end plate according to claim 5, wherein the first fitting portion (101) further comprises a first mounting hole (1012), the first mounting hole (1012) communicates with the first fitting surface (1010) and an end surface of the first end plate structure (100) along a first direction, the second fitting portion (201) is provided with a second mounting hole (2012) at a position corresponding to the first mounting hole (1012), and the second mounting hole (2012) communicates with the third fitting surface (2010) and an end surface of the second fitting portion (201) along the first direction, so that the fastener (300) fixedly connects the adjacent second end plate structure (200) and first end plate structure (100) through the second mounting hole (2012) and the first mounting hole (1012).

7. The combination endplate of claim 5, wherein the first fitting part (101) is provided with a first positioning structure (1013) and the second fitting part (201) is provided with a second positioning structure (2013), the first positioning structure (1013) cooperating with the second positioning structure (2013) to position the second fitting part (201) at the first fitting part (101).

8. The composite end plate of claim 7, wherein the first positioning structure (1013) is a positioning protrusion provided on the first fitting surface (1010), and the second positioning structure (2013) is a positioning groove provided on the third fitting surface (2010).

9. The composite end panel according to claim 1, wherein the lateral outer edges of the first end panel structure (100) or the second end panel structure (200) are provided with first rounded structures (105).

10. The combination endplate according to claim 5, characterized in that the outer edge of the second fitting surface (1011) or the fourth fitting surface (2011) is provided with a second rounded corner structure (106).

11. The combination endplate according to any of claims 1-10, wherein both sides of the first endplate structure (100) and both sides of the second endplate structure (200) are provided with limiting grooves (102) for limiting the securing strap (500).

12. The composite end plate according to claim 11, characterized in that a third rounded corner structure (103) is provided at the lateral outer edge of the limit groove (102).

13. A battery module comprising a module assembly and a composite end plate according to any one of claims 1 to 12, said composite end plate being mounted on the module assembly.

14. A battery pack comprising a battery pack case and the battery module of claim 13.