End plate structure, battery module, battery pack and energy storage electric equipment

Abstract

The utility model provides an end plate structure, a battery module, a battery pack and energy storage electric equipment, and relates to the technical field of batteries, the end plate structure comprises an end plate body, a mounting groove is formed in the end face of the end plate body, and a terminal seat of the battery module is embedded in the mounting groove; the size of the installation groove in the first direction and the size of the installation groove in the second direction are both larger than the size of the terminal base. The first direction is the width direction of the end plate body, and the second direction is the length direction of the end plate body; a mounting groove is formed in the base, a first clamping structure is arranged in the mounting groove, the terminal seat comprises a terminal seat body and a second clamping structure, the terminal seat body is clamped with the first clamping structure in the mounting groove through the second clamping structure, and the terminal seat can move in the mounting groove. According to the utility model, the terminal seat is movably connected with the end plate structure, so that the end plate structure and the terminal seat cannot be damaged in the charging expansion process of the battery, and the normal work of the battery module is correspondingly ensured.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an end plate structure, a battery module, a battery pack, and energy storage electrical equipment. Background Art

[0002] Currently, a battery pack is an integral unit assembled from multiple battery modules and is used to store and provide electrical energy.

[0003] In related art, a battery module may include two end plates, a conductive connecting bar, a terminal block, and multiple batteries. The multiple batteries are connected in parallel or series. A terminal block is positioned between the two end plates to limit the displacement of the batteries. Furthermore, the conductive connecting bar may include a first aluminum bar and a second aluminum bar. The electrodes of two adjacent batteries in the middle region are electrically connected via the first aluminum bar. The electrodes of the batteries at the ends are welded to one end of the second aluminum bar, and the other end of the second aluminum bar is connected to the terminal block. The terminal block is generally fixed to the end plates using fasteners, thereby increasing the stability of the connection between the batteries, the conductive connecting bar, and the end plates.

[0004] However, the inventors realized that in actual use, for example, during the normal operation of the battery module during cyclic charging, the batteries of the battery module will expand outward, causing the terminal seat to be displaced relative to the end plate, thereby damaging the terminal seat and the end plate, and thus affecting the normal operation of the battery module. Utility Model Content

[0005] One or more embodiments of the present application provide an end plate structure, a battery module and a battery pack to solve or at least partially alleviate the problem in the battery module of the related art that the terminal seat and the end plate are in a fixed connection relationship, thereby causing damage to the terminal seat and the end plate during the expansion of the battery.

[0006] In a first aspect of the present application, an end plate structure is provided, which adopts the following technical solution:

[0007] An end plate structure, comprising an end plate body, wherein an end surface of the end plate body is provided with a mounting groove, wherein the mounting groove is used to insert a terminal seat of a battery module, and the dimensions of the mounting groove in a first direction and a second direction are both larger than the dimensions of the terminal seat; the first direction is the width direction of the end plate body, and the second direction is the length direction of the end plate structure;

[0008] A first clamping structure is provided in the mounting groove, and the terminal seat includes a terminal seat body and a second clamping structure. The terminal seat body is clamped with the first clamping structure in the mounting groove through the second clamping structure, and the terminal seat is movable in the mounting groove.

[0009] In some embodiments, the inner side wall of the mounting groove is further provided with an anti-fool structure for limiting the reverse insertion of the terminal seat into the mounting groove, and the anti-fool structure is a concave-convex structure.

[0010] In some embodiments, a plurality of the mounting grooves are provided on the end plate body, at least one of the mounting grooves is used for inserting the terminal seat; a first through hole is provided on the bottom wall of at least one of the mounting grooves, and the first through hole is connected to at least one of the mounting grooves to form a lifting hole, and the lifting hole is used to connect the lifting equipment.

[0011] In some embodiments, the end plate structure further includes a support base disposed on the end plate body, the support base being provided with a positioning hole, and the positioning hole being used to connect the wiring harness isolation plate of the battery module via a fastener.

[0012] In some embodiments, a weight-reducing structure is provided on the end plate body, and the weight-reducing structure includes one or more first groove structures, and the one or more first groove structures are distributed on the end plate body.

[0013] In some embodiments, the end plate structure further includes a first reinforcement structure, the end plate body has a first side surface and a second side surface, the first side surface is used to be fitted with the battery of the battery module, and the first reinforcement structure is arranged on the second side surface.

[0014] In some embodiments, the first reinforcement structure includes a first reinforcement rib and a second reinforcement rib, the first reinforcement rib and the second reinforcement rib are arranged at an angle, and the intersection of the first reinforcement rib and the second reinforcement rib corresponds to the middle area of ​​the battery.

[0015] In some embodiments, the end plate structure also includes a screw mounting portion, and a plurality of the screw mounting portions are arranged on the end plate body at intervals along the second direction. The screw mounting portion has a second through hole, and the second through hole of the screw mounting portion is used to connect the screw structure of the liquid cooling plate of the battery module.

[0016] In some embodiments, a plurality of second groove structures are provided on an end surface of the end plate body away from the terminal seat, and the second groove structures correspond to the positions of the screw mounting portions.

[0017] In some embodiments, a side wall of the screw mounting portion away from the battery of the battery module is provided with an observation hole, and a side wall of the screw mounting portion facing the battery is a baffle structure.

[0018] In some embodiments, the end plate structure further includes a second reinforcement structure, and the second reinforcement structure is provided on the side wall of the screw mounting portion along the second direction.

[0019] In some embodiments, a limiting groove is provided on the screw mounting portion, and the limiting groove is used to connect with the fastening belt of the battery module.

[0020] In some embodiments, the first clamping structure is arranged on the inner side wall of the installation groove, and the second clamping structure includes a clamping plate and a clamping protrusion arranged on the clamping plate, the clamping plate is in the installation groove, and the clamping protrusion is clamped with the first clamping structure.

[0021] In some embodiments, the mounting groove is further provided with a protrusion structure on the inner side wall having the first clamping structure, and the protrusion structure is located above the clamping protrusion.

[0022] Compared with the related art, one or more embodiments of the present application include at least one of the following beneficial technical effects:

[0023] The end plate structure may include an end plate body, and at least one mounting groove may be opened on the end plate body. Since the size of the mounting groove in the first direction (such as width) and the size of the second direction (such as length) are larger than the size of the terminal seat (such as width and length), the terminal seat body of the terminal seat can be smoothly embedded in the mounting groove, and the second clamping structure of the terminal seat can be clamped with the first clamping structure of the mounting groove, thereby realizing the installation of the terminal seat on the end plate structure, and correspondingly realizing the assembly operation of part of the structure of the battery module.

[0024] Since the terminal seat can move in the mounting groove, specifically, the terminal seat can move in the mounting groove along the first direction and the second direction. When the batteries in the battery module expand outward during use, such as during cyclic charging, at this time, since the size of the mounting groove in the first direction (such as width) and the size of the second direction (such as length) are larger than the size of the terminal seat (such as width and length), in other words, a gap is reserved or exists between the inner side wall of the mounting groove in the first direction and the second direction and the terminal seat, wherein the batteries in the battery module can be connected to the terminal seat through a conductive connecting row, so that the expansion of the battery will drive the terminal seat to automatically move slightly in the gap. In short, the terminal seat and the end plate structure are in a movable connection relationship, which reduces the possibility of damage to the end plate structure and the terminal seat, thereby ensuring the normal operation of the battery module accordingly.

[0025] In a second aspect of the present application, a battery module is provided, which adopts the following technical solution:

[0026] A battery module comprises the end plate structure as described above and a plurality of batteries, wherein the plurality of batteries are arranged between two end plate structures.

[0027] Therefore, since the battery module includes the end plate structure, the battery module at least has all the technical effects of the end plate structure, which will not be described in detail here.

[0028] In some embodiments, both ends of the end plate structure along the second direction protrude from ends of the battery along the second direction.

[0029] The third aspect of the present application provides a battery pack, which adopts the following technical solution:

[0030] A battery pack includes the battery module described above.

[0031] Therefore, since the battery pack includes a battery module, the battery pack at least has all the technical effects of the battery module, which will not be repeated here.

[0032] In a fourth aspect of the present application, an energy storage device is provided, which adopts the following technical solution:

[0033] An energy storage electrical device includes the battery pack described above.

[0034] Therefore, since the energy storage electrical equipment includes a battery pack, the energy storage electrical equipment at least has all the technical effects of the battery pack, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction to the drawings of the embodiments will be given below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not intended to limit the present application.

[0036] Figure 1 Schematic diagram of the partial structure of a battery module according to some embodiments of the present application.

[0037] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0038] Figure 3 This is a schematic structural diagram of a terminal block according to some embodiments of the present application.

[0039] Figure 4 Schematic diagram of the comparative structure of the end plate structure before and after the cross section along the section line AA according to some embodiments of the present application.

[0040] Figure 5 for Figure 4 Enlarged structural diagram at point B in the middle.

[0041] Figure 6 Schematic diagram of the comparative structure of the end plate structure and the terminal seat before and after the cross section along the section line BB according to some embodiments of the present application.

[0042] Figure 7 for Figure 6 Enlarged structural diagram at point C in the middle.

[0043] Figure 8 One of structural schematic diagrams of an end plate structure according to some embodiments of the present application.

[0044] Figure 9 Another of structural schematic diagrams of an end plate structure according to some embodiments of the present application.

[0045] Figure 10 One of structural schematic diagrams of an end plate structure according to some embodiments of the present application. Figure 9 Enlarged structural diagram at D.

[0046] Figure 11 Another of structural schematic diagrams of an end plate structure according to some embodiments of the present application. Figure 9 Enlarged structural diagram at E.

[0047] Figure 12 Another of structural schematic diagrams of an end plate structure according to some embodiments of the present application.

[0048] Figure 13 Another of structural schematic diagrams of an end plate structure according to some embodiments of the present application.

[0049] Figure 14 Another of structural schematic diagrams of an end plate structure according to some embodiments of the present application. Figure 13 Enlarged structural diagram at F.

[0050] Figure 15 Structural schematic diagram of a battery module according to some embodiments of the present application.

[0051] BRIEF DESCRIPTION OF THE DRAWINGS

[0052] 1 - end plate structure; 11 - end plate body; 1100 - first side surface; 1101 - second side surface; 111 - mounting groove; 1110 - first through hole; 112 - first clamping structure; 113 - first groove structure; 114 - second groove structure; 13 - protrusion structure; 14 - fool-proof structure; 15 - support seat; 151 - positioning hole; 16 - first reinforcing structure; 161 - first reinforcing rib; 162 - second reinforcing rib; 163 - third reinforcing rib; 17 - screw mounting portion; 171 - second through hole; 172 - observation hole; 173 - limiting groove; 18 - second reinforcing structure; 19 - cavity; 2 - terminal seat; 21 - terminal seat body; 22 - second clamping structure; 221 - clamping plate; 222 - clamping protrusion; 3 - fastener; 4 - wire harness isolation plate; 5 - battery; 6 - fastening band; 7 - conductive connection row; 8 - connection wire harness. DETAILED DESCRIPTION

[0053] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are for illustrative purposes only and are not intended to limit the scope of protection of the present application.

[0054] The Z-axis in the accompanying drawings represents the vertical direction, that is, the up-down position, with the positive direction of the Z-axis representing the top and the reverse direction of the Z-axis representing the bottom. The X-axis in the accompanying drawings represents the horizontal direction and is designated as the left-right position, with the positive direction of the X-axis representing the right side and the reverse direction of the X-axis representing the left side. The Y-axis in the accompanying drawings represents the front-to-back position, with the positive direction of the Y-axis representing the front side and the reverse direction of the Y-axis representing the back side. It should also be noted that the aforementioned Z-axis, Y-axis, and X-axis are merely for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0055] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by one skilled in the art to which this application belongs. The terms used in this application's specification and claims are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including," "comprising," "having," "having," "containing," and "containing" in the specification and claims of this application and the accompanying drawings are open-ended terms. Thus, "including," "comprising," and "having" refer, for example, to a method or apparatus having one or more steps or elements, but are not limited to having only those one or more elements. The terms "first," "second," and "first" in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a specific order or priority. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of the technical features indicated. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of the features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0057] It should be noted that the modifications of "one" and "multiple" mentioned in this application are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0058] In the description of the present application, it should be understood that the terms "center", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0060] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0061] Figure 1 is a partial structural diagram of a battery module according to some embodiments of the present application. Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0062] One or more embodiments of the present application disclose an end plate structure. Figure 1 and Figure 2 The end plate structure 1 includes an end plate body 11, and a mounting groove 111 is provided on the end surface of the end plate body 11. The terminal seat 2 of the battery module is embedded in the mounting groove 111. The dimensions of the mounting groove 111 in the first direction and the second direction are both larger than the dimensions of the terminal seat 2; the first direction is the width direction of the end plate body 11, and the second direction is the length direction of the end plate body 11;

[0063] A first clamping structure 112 is provided in the mounting groove 111, and the terminal seat 2 includes a terminal seat body 21 and a second clamping structure 22. The terminal seat body 21 is clamped with the first clamping structure 112 in the mounting groove 111 through the second clamping structure 22, and the terminal seat 2 is movable in the mounting groove 111.

[0064] In some embodiments, at least one mounting groove 111 may be provided on one end surface of the end plate body 11 facing the terminal block 2, and the number of mounting grooves 111 is greater than or equal to the number of terminal blocks 2 on the same side. Figure 1 and Figure 2 The Y-axis direction in the coordinate system is parallel, so the size of the mounting groove 111 in the first direction can be the width of the mounting groove 111; the second direction can refer to the length direction of the end plate body 11, which can be Figure 1 and Figure 2 The X-axis direction in the coordinate system is parallel, so the dimension of the mounting groove 111 in the second direction can be the length of the mounting groove 111 .

[0065] The shapes of the first clamping structure 112 and the second clamping structure 22 match each other so that they can be clamped together. The terminal block 2 is used to move in the installation groove 111, so the first clamping structure 112 and the second clamping structure 22 are movable.

[0066] The terminal base body 21 and the second clamping structure 22 can be constructed as an integral structure, thereby ensuring the mechanical strength of the terminal base 2.

[0067] The end plate structure 1 may include an end plate body 11, and at least one mounting groove 111 may be provided on the end plate body 11. The number and position of the mounting grooves 111 correspond to the terminal block 2. Since the size of the mounting grooves 111 in the first direction (e.g., reference Figure 2 The Y axis in the second direction (e.g., the reference Figure 2 The X-axis in the figure is larger than the size of the terminal seat 2 (such as the width and length), so that the terminal seat body 21 of the terminal seat 2 can be smoothly embedded in the installation groove 111, and the second clamping structure 22 of the terminal seat 2 can be clamped with the first clamping structure 112 of the installation groove 111, thereby realizing the installation of the terminal seat 2 on the end plate structure 1, and correspondingly realizing the assembly operation of part of the structure of the battery module.

[0068] Since the terminal seat 2 can move in the mounting groove 111, specifically, the terminal seat 2 can move horizontally in the mounting groove 111 along the first direction and the second direction. When the battery 5 in the battery module expands outward during use, such as during cyclic charging, at this time, since the size of the mounting groove 111 in the first direction and the second direction is larger than the size of the terminal seat 2, in other words, a gap is reserved or exists between the inner side wall of the mounting groove 111 in the first direction and the second direction and the terminal seat 2, wherein the battery 5 in the battery module can be connected to the terminal seat 2 through the conductive connecting row 7, so that the expansion of the battery 5 will drive the terminal seat 2 to automatically move slightly in the gap. In short, the terminal seat 2 and the end plate structure 1 are in a movable connection relationship, which reduces the possibility of damage to the end plate structure 1 and the terminal seat 2, thereby ensuring the normal operation of the battery module accordingly.

[0069] In at least one embodiment, combined Figure 10 and Figure 11 As shown, the inner side wall of the installation groove 111 is further provided with an anti-fool structure 14 for limiting the reverse insertion of the terminal block 2 into the installation groove 111, and the anti-fool structure 14 is a concave-convex structure.

[0070] In some embodiments, the concave-convex structure refers to the alternating arrangement of grooves and convexities. Figure 10 In the embodiment, the concave-convex structure can be provided on the inner side wall of the installation groove 111 away from the first clamping structure 112 .

[0071] Under the condition that part of the terminal block body 21 in the terminal block 2 needs to be positively embedded in the mounting groove 111, the side wall of the terminal block body 21 away from the second clip structure 22 corresponds to the concave-convex structure, and the second clip structure 22 corresponds to the first clip structure 112, so as to ensure that the terminal block body 21 is positively embedded in the mounting groove 111; on the contrary, if the terminal block 2 is reversely installed in the mounting groove 111, specifically, the second clip structure 22 of the terminal block 2 corresponds to the concave-convex structure. At this time, the relatively arranged concave-convex structure and the second clip structure 22 will limit (hinder) the terminal block body 21 from being embedded in the mounting groove 111. Therefore, by providing an anti-fool structure 14 with a concave-convex structure on the inner wall of the mounting groove 111, the terminal block body 21 can be prevented from being reversely inserted into the mounting groove 111 to ensure that the terminal block 2 and the mounting groove 111 are assembled quickly and accurately.

[0072] Figure 4 Schematic diagram of the comparison of the end plate structure before and after the cross section along the section line AA according to some embodiments of the present application. Figure 5 for Figure 4 The enlarged structure diagram at B in the middle, Figure 6 Schematic diagram of the comparison of the end plate structure and the terminal block before and after the cross section along the section line BB according to some embodiments of the present application. Figure 7 for Figure 6 The enlarged structure diagram at C in the middle, Figure 8 This is one of the structural schematic diagrams of the end plate structure according to some embodiments of the present application. Figure 9 This is the second structural schematic diagram of the end plate structure according to some embodiments of the present application.

[0073] In at least one embodiment, combined Figures 4 to 9 As shown, a plurality of mounting grooves 111 are provided on the end plate body 11, and at least one mounting groove 111 is used for inserting the terminal seat 2; a first through hole 1110 is provided on the bottom wall of at least one mounting groove 111, and the first through hole 1110 is connected with at least one mounting groove 111 to form a lifting hole, and the lifting hole is used to connect the lifting equipment.

[0074] In some embodiments, Figure 9 In the embodiment, the end plate body 11 can be arranged along the third direction ( Figure 9 A plurality of, for example, four, mounting grooves 111 are provided on one end surface (positive direction of the Z axis in the coordinate system); Figure 12 As shown, along the second direction (reference Figure 1 Two rows of battery cell groups are set in the X-axis direction, and the battery module is arranged along the first direction (reference Figure 1 The number of terminal blocks 2 at one end of the Y-axis direction) is two; if the terminal blocks are connected along the second direction (reference Figure 1 A row of battery cell groups is set in the X-axis direction, and the battery module is arranged along the first direction (referenceFigure 1 The number of the terminal base 2 at one end along the Y-axis direction) is one, so the number of the terminal bases at one end along the first direction in the battery module is the same as the number of the terminal bases at one end along the second direction (reference Figure 1 corresponds to the number of columns of battery cell groups set in the X-axis direction).

[0075] Take the battery module including the above two rows of battery cell groups as an example, wherein two of the two mounting grooves 111, for example, located on both sides, are used to embed the mounting terminal seat 2, and the other two, for example, the inner bottom walls of the two mounting grooves 111 located in the middle are provided with first through holes 1110, and the axis of the first through holes 1110 can be aligned with the inner bottom walls of the two mounting grooves 1111. Figure 9 The Z-axis direction in the coordinate system is parallel, and the mounting groove 111 in the middle is connected to the first through hole 1110 to form a hanging hole, which can be used to connect the hook of the hanging equipment.

[0076] Since the inner bottom wall of the installation groove 111 is provided with the first through hole 1110, and the first through hole 1110 can be connected with the installation groove 111 to form a lifting hole, when the hook of the lifting equipment is hooked with the lifting hole to lift the end plate structure 1 or the battery module, compared with the hook only being hooked with the first clamping structure 112, it is equivalent to increasing the connection area between the end plate body 11 and the hook, thereby increasing the force strength of the end plate body 11 and reducing the possibility of damage to the end plate body 11 at the lifting hole.

[0077] In at least one embodiment, in combination Figure 1 and Figure 10 As shown, the end plate structure 1 further includes a support base 15 disposed on the end plate body 11 , and a positioning hole 151 is provided on the support base 15 , and the positioning hole 151 is used to connect the wiring harness isolation plate 4 of the battery module through a fastener 3 .

[0078] In some embodiments, Figure 15 In the embodiment, the battery module may include a wiring harness isolation plate 4 , which may be mounted on a plurality of batteries 5 , and the wiring harness isolation plate 4 is used to mount a connection harness 8 electrically connected to the batteries 5 .

[0079] The harness isolation plate 4 can be installed on the end plate structure 1 in the following manner, for example, the end plate body 11 can be installed along the third direction (for example, Figure 1 A support seat 15 is provided on one end face of the Z axis direction in the coordinate system (see Figure 10 As shown), the support seat 15 can be arranged on the end plate body 11 in the following manner, for example, the end plate body 11 is arranged along the third direction (with Figure 10The part structure of the end face parallel to the Z-axis direction in the coordinate system is upwardly protruded to form a support seat 15; alternatively, the support seat 15 can be fixed on the end plate body 11 by a separate component. The support seat 15 can adopt a trapezoidal structure or other shape structure, and a positioning hole 151 can be formed at the top of the support seat 15. When the wire harness isolation plate 4 is installed on the battery 5, the end part of the wire harness isolation plate 4 in the first direction protrudes out of the battery 5 and is located on the support seat 15. At this time, the positioning hole 151 can be vertically penetrated by the fastener 3 such as a bolt fastener (as shown in Figure 2 The wire harness isolation plate 4 is connected with the end plate structure 1 through the fastener 3, and the wire harness isolation plate 4 is limited in the first direction through the fastener 3.

[0080] In at least one embodiment, as shown in Figure 9 The end plate body 11 is provided with a weight reduction structure, and the weight reduction structure includes one or more first groove structures 113, and the one or more first groove structures 113 are distributed on the end plate body 11.

[0081] In some embodiments, the weight reduction structure can include one first groove structure 113; alternatively, as shown in Figure 9 A plurality of first groove structures 113 can be arranged at intervals on the end plate body 11 along the end face in the first direction, and the plurality of first groove structures 113 can constitute the weight reduction structure.

[0082] By providing the weight reduction structure in the form of a groove structure on the end plate body 11, the weight and cost of the end plate structure 1 and the battery module can be effectively reduced.

[0083] Figure 12 Structure diagram three of the end plate structure 1 according to some embodiments of the present application.

[0084] In at least one embodiment, as shown in Figure 9 and Figure 12 The end plate structure 1 further includes a first reinforcing structure 16, the end plate body 11 has a first side face 1100 and a second side face 1101, the first side face 1100 is used to be arranged in abutment with the battery 5 of the battery module, and the first reinforcing structure 16 is arranged on the second side face 1101.

[0085] In some embodiments, the two end faces of the end plate body 11 in the first direction can be defined as the first side face 1100 and the second side face 1101, for example, the side face of the end plate body 11 in abutment with the battery 5 is the first side face 1100, and the other side face of the end plate body 11 away from the battery 5 can be the second side face 1101.

[0086] At least one first reinforcement structure 16 may be provided on the second side surface 1101. The number of first reinforcement structures 16 in the end plate structure 1 matches the number and position of the batteries 5 on the same side. Figure 1 In the X-axis direction), two rows of battery cell groups are set, and the corresponding reference Figure 12 As shown in FIG, two first reinforcement structures 16 arranged along the second direction are provided on the second side surface 1101 of the end plate body 11.

[0087] By providing the first reinforcement structure 16 on the second side surface 1101, the mechanical strength of the entire end plate structure 1 can be effectively increased, thereby reducing the possibility of deformation of the end plate structure 1 caused by expansion of the battery 5 during charging, and correspondingly extending the service life of the end plate structure 1.

[0088] In at least one embodiment, combined Figure 12 As shown, the first reinforcement structure 16 includes a first reinforcement rib 161 and a second reinforcement rib 162 . The first reinforcement rib 161 and the second reinforcement rib 162 are arranged at an angle, and the intersection of the first reinforcement rib 161 and the second reinforcement rib 162 corresponds to the middle area of ​​the battery 5 .

[0089] In some embodiments, the first reinforcing rib 161 may be arranged along the second direction (with Figure 12 The first reinforcing rib 161 can be a horizontal rib, and the second reinforcing rib 162 can be arranged along the third direction (parallel to the X-axis direction in the coordinate system). Figure 12 The second reinforcing rib 162 may be a vertical rib, so the first reinforcing rib 161 and the second reinforcing rib 162 are arranged vertically.

[0090] The first reinforcing structure 16 further includes a third reinforcing rib 163 , and the third reinforcing rib 163 is disposed at an angle to the first reinforcing rib 161 and the second reinforcing rib 162 , respectively. Therefore, the third reinforcing rib 163 may be an oblique rib extending obliquely.

[0091] Since the first reinforcing rib 161 and the second reinforcing rib 162 are arranged at an angle, and the intersection of the two corresponds to the middle area of ​​the battery 5, or the intersection of the first reinforcing rib 161, the second reinforcing rib 162 and the third reinforcing rib 163 corresponds to the middle area of ​​the battery 5, in other words, at least two reinforcing ribs concentrate strength protection at one point. When the end plate structure 1 is continuously subjected to the expansion force of the battery, the strength can be reinforced and protected by connecting the ribs in other parts, thereby effectively increasing the overall mechanical strength of the end plate structure 1 to effectively protect the battery 5 after expansion.

[0092] Furthermore, combined Figure 12As shown, the connection between the third reinforcement rib 163 and other reinforcement ribs such as the first reinforcement rib 161 and the second reinforcement rib 162 is thickened at an angle, which effectively strengthens the central large surface and the surrounding areas of the end plate body 11, and plays a good stress improvement role for the end plate structure 1 under continuous point force.

[0093] Combine Figure 4 and Figure 6 As shown, at least two of the first reinforcing rib 161, the second reinforcing rib 162 and the third reinforcing rib 163 can form multiple chambers 19 together with the end plate body 11, and a first through hole 1110 is opened on the inner bottom wall of at least one mounting groove 111, and the first through hole 1110 can be connected to the chamber 19 located above the multiple chambers 19 mentioned above.

[0094] In at least one embodiment, in combination Figure 12 As shown, the end plate structure 1 also includes a screw mounting portion 17, and a plurality of the screw mounting portions 17 are arranged on the end plate body 11 at intervals along the second direction. The screw mounting portion 17 has a second through hole 171, and the second through hole 171 of the screw mounting portion 17 is used to connect the screw structure of the liquid cooling plate of the battery module.

[0095] In some embodiments, the screw structure may be a long bolt.

[0096] A plurality of, for example, three, screw mounting portions 17 arranged at intervals along the second direction may be provided on the end plate body 11. The screw mounting portion 17 may be a cylindrical structure with a second through hole 171 (i.e., hollow inside) provided inside. In other words, the top and bottom ends of the screw mounting portion 17 are penetrated so that the screw structure can be connected to the liquid cooling plate of the battery module after passing through the second through hole 171 to achieve a fixed connection between the end plate structure 1 and the liquid cooling plate; and a plurality of the screw mounting portions 17 are arranged at intervals along the second direction on the end plate body 11, which is equivalent to notifying an increase in the connection point position with the liquid cooling plate to improve the connection stability between the end plate structure 1 and the liquid cooling plate.

[0097] Figure 13 This is a fourth structural diagram of the end plate structure 1 according to some embodiments of the present application. Figure 14 for Figure 13 Enlarged structural diagram at F in the middle.

[0098] In at least one embodiment, in combination Figure 13 and Figure 14 As shown, a plurality of second groove structures 114 are provided on an end surface of the end plate body 11 away from the terminal seat 2 , and the second groove structures 114 correspond to the positions of the screw mounting portions 17 .

[0099] In some embodiments, the end plate body 11 is provided with a plurality of second recess structures 114 at an end surface, for example, a bottom end surface, away from the terminal seat 2. The second recess structures 114 can be understood as the bottom end surface of the end plate body 11 being lower at the second recess structures 114 than other parts of the bottom end surface. The number and position of the second recess structures 114 can correspond to the number and position of the screw rod mounting portions 17, for example, the number of second recess structures 114 can be three.

[0100] By providing a plurality of second recess structures 114 at an end surface of the end plate body 11 away from the terminal seat 2, when the screw rod structure penetrates the second penetration holes 171 of the screw rod mounting portions 17 and is locked with screws, the second recess structures 114 can play a role of avoiding interference to effectively reduce interference when the liquid cooling plate is assembled.

[0101] In at least one embodiment, in combination with Figure 12 As shown, the screw rod mounting portion 17 is provided with an observation hole 172 at a side wall away from the battery 5 of the battery module, and the side wall of the screw rod mounting portion 17 toward the battery 5 is a baffle structure.

[0102] In some embodiments, in combination with Figure 12 As shown, the observation hole 172 can be provided at a side wall of the screw rod mounting portion 17 away from the battery 5, and when the screw rod structure penetrates the second penetration holes 171 of the screw rod mounting portion 17, the worker can judge the specific situation of the screw rod structure in the screw rod mounting portion 17 through the observation hole 172, to facilitate the pre-judgment of whether the fastening force of the screw rod structure and the liquid cooling plate is in place.

[0103] The side wall of the screw rod mounting portion 17 toward the battery 5 is a baffle structure, which can be understood as the end plate body 11 being a closed baffle structure at a side wall away from the screw rod mounting portion 17 at a position corresponding to the screw rod mounting portion 17, or in other words, the end plate body 11 being a closed baffle structure at the opposite side of the observation hole 172, thereby improving the insulation protection between the screw rod structure and the battery 5, to avoid the screw rod structure being directly contacted with the battery during the installation process of inserting the screw rod structure into the second penetration holes 171 of the screw rod mounting portion 17, thereby causing the phenomenon of sparking and arcing.

[0104] Figure 13 It is a fourth structural schematic view of the end plate structure 1 according to some embodiments of the present application.

[0105] In at least one embodiment, in combination with Figure 13 As shown, the end plate structure 1 further comprises a second reinforcing structure 18, and the screw rod mounting portion 17 is provided with the second reinforcing structure 18 along the side wall in the second direction.

[0106] In some embodiments, a second reinforcing structure 18 is provided on the side wall of the screw mounting portion 17 along the second direction. The second reinforcing structure 18 may be a widening rib. In other words, the screw mounting portion 17 is reinforced and fixed at both ends along the second direction by the second reinforcing structure 18, which can effectively increase the mechanical strength of the screw mounting portion 17 and further reduce the side wall of the screw mounting portion 17 being scratched due to tilting when the screw structure vertically penetrates the screw mounting portion 17.

[0107] Figure 15 Schematic diagram of the structure of a battery module according to some embodiments of the present application.

[0108] In at least one embodiment, combined Figure 13 and Figure 14 As shown, a limiting groove 173 is provided on the screw mounting portion 17 , and the limiting groove 173 is used to connect with the fastening belt 6 of the battery module.

[0109] In some embodiments, combined Figure 15 As shown, the battery module may include two rows of battery cell modules consisting of multiple batteries 5 and two end plate structures 1. The two end plate structures 1 are spaced apart along a first direction. Multiple batteries 5 can be arranged between the two end plate structures 1. At least one, for example, two, fastening bands 6 are wrapped around the end plate structures 1 and the multiple batteries 5 to achieve the goal of fixing the end plate structures 1 and the multiple batteries 5 into an integrated battery module. The two fastening bands 6 can be arranged in a third direction (can be aligned with the end plate structure 1). Figure 15 The fastening belt 6 can be a steel belt or a belt-shaped fastening structure made of other materials, and is not specifically limited here.

[0110] A limiting groove 173 is provided on the screw mounting portion 17 at a position corresponding to the fastening belt 6. The fastening belt 6 can be located in the limiting groove 173, thereby limiting the position of the fastening belt 6 in the vertical direction, which is conducive to limiting the displacement of the fastener 3 during the transportation, installation, and use of the battery module.

[0111] An arc-shaped structure can be provided at the edge of the end plate body 11 away from the battery 5, which can better limit the position of the fastening belt 6. During the pre-tightening process of multiple batteries 5 and the end plate structure 1 in groups, the fastening belt 6 and the end plate structure 1 cooperate with each other and do not interfere with each other, whether during the extrusion process or after the extrusion is completed.

[0112] Figure 3 It is a schematic structural diagram of the terminal block 2 according to some embodiments of the present application.

[0113] In at least one embodiment, combined Figure 2 and Figure 3As shown, the first clamping structure 112 is arranged on the inner side wall of the installation groove 111, and the second clamping structure 22 includes a clamping plate 221 and a clamping protrusion 222 arranged on the clamping plate 221, the clamping plate 221 is in the installation groove 111, and the clamping protrusion 222 is clamped with the first clamping structure 112.

[0114] In some embodiments, reference Figure 2 In the embodiment, a first clamping structure 112 may be provided at a position corresponding to the mounting groove 111 at the end of the end plate body 11 along the first direction. The first clamping structure 112 may not penetrate the end plate body 11 along the first direction ( Figure 2 The groove structure of the side wall of the Y-axis in the coordinate system can also be a groove structure that penetrates the end plate body 11 along the first direction ( Figure 2 The through-hole structure on the side wall (in the Y-axis direction in the coordinate system).

[0115] The axis of the mounting groove 111 can be aligned with Figure 2 The Z axis in the coordinate system is parallel to the Z axis, and the axis of the first clamping structure 112 can be parallel to the Z axis. Figure 2 The Y-axis direction (first direction) in the coordinate system is parallel, so the axis of the first clamping structure 112 (with Figure 2 The Y-axis direction in the coordinate system) and the axis of the mounting groove 111 (corresponding to Figure 2 The Z-axis direction in the coordinate system corresponds to vertical.

[0116] exist Figure 3 In the embodiment, the clamping plate 221 can be arranged vertically, and the clamping protrusion 222 can be arranged at the bottom of the side wall of the clamping plate 221, and the clamping protrusion 222 and the clamping plate 221 can be constructed into an integral structure, thereby ensuring the mechanical strength of the second clamping structure 22.

[0117] Combine Figure 2 As shown, the upper part of the terminal block body 21 can be connected to the conductive connection row 7, the lower part of the terminal block body 21 and the clamping plate 221 are in the mounting groove 111, and the clamping protrusion 222 of the second clamping structure 22 is clamped into the first clamping structure 112, thereby realizing that the terminal block body 21 is partially embedded in the mounting groove 111, and the second clamping structure 22 of the terminal block 2 can also be clamped with the first clamping structure 112 arranged on the end plate body 11.

[0118] Combine Figure 5 As shown, the mounting groove 111 of the end plate body 11 is provided with a first clamping structure 112 along the inner wall of the first direction, and the first through hole 1110 opened on the inner bottom wall of the mounting groove 111 can be communicated with a chamber 19 located above; Figure 7As shown, when part of the terminal seat body 21 of the terminal seat is inserted into the mounting groove, the snap-fitting protrusion 222 is snapped into the first snap-fitting structure 112 which can be a through-hole structure or a groove structure. At this time, the bottom end of the snap-fitting protrusion 222 can contact the inner bottom wall of the mounting groove 111 or there is a small gap.

[0119] Figure 9 This is the second structural diagram of the end plate structure 1 according to some embodiments of the present application. Figure 10 for Figure 9 Enlarged structural diagram at point D in the middle.

[0120] In at least one embodiment, combined Figures 9 to 11 As shown, the mounting groove 111 is further provided with a protruding structure 13 on the inner side wall having the first clamping structure 112 , and the protruding structure 13 is located above the clamping protrusion 222 .

[0121] In some embodiments, the protruding structure 13 may be located above the first engaging structure 112 and may be integrally formed with the inner wall of the mounting groove 111. The protruding structure 13 may be a block structure, a strip structure, etc., and is not specifically limited here.

[0122] When the clamping protrusion 222 of the terminal block 2 is clamped with the first clamping structure 112, the protrusion structure 13 is above the clamping protrusion 222, which is equivalent to increasing the contact area between the clamping protrusion 222 of the terminal block 2 and the first clamping structure 112 in the first direction, and further effectively limiting the second clamping protrusion 222 of the terminal block 2 from being separated from the first clamping structure 112 of the groove structure or the through-hole structure when the terminal block body 21 moves along the first direction in the mounting groove 111.

[0123] One or more embodiments of the present application also disclose a battery module. Figure 1 and 9 The battery module includes the end plate structure 1 as described in the above embodiment, and also includes a plurality of batteries 5, and the plurality of batteries 5 are arranged between two of the end plate structures 1.

[0124] In some embodiments, the battery module may include two end plate structures 1 . The two end plate structures 1 may be spaced apart along a first direction, and a plurality of batteries 5 may be disposed between two adjacent end plate structures 1 .

[0125] In addition, combined Figure 15 As shown, the terminal block 2 can be arranged in the battery module with the conductive connection row 7 in the first direction (with Figure 15At the end portion (parallel to the Y-axis direction in the coordinate system), the conductive connecting row 7 of the battery module can be electrically connected to the electrode ends of the battery 5, such as the positive end and the negative end, and can serve as a connecting component for two adjacent batteries 5 in series or in parallel, and the portion of the conductive connecting row 7 at the end portion along the first direction in the battery module can be fixed to the terminal seat 2 by bolts.

[0126] The beneficial effects of the battery module of this embodiment relative to the related art are the same as those of the above-mentioned end plate structure 1 and will not be described again here.

[0127] In at least one embodiment, the battery module further includes a fastening belt 6 , and both ends of the end plate structure 1 along the second direction protrude from the ends of the battery 5 along the second direction; the fastener 3 surrounds the end plate structure 1 and the plurality of batteries 5 .

[0128] In some embodiments, the two ends of the end plate structure 1 along the second direction protrude from the ends of the battery 5 along the second direction, which can be understood as the size of the end plate structure 1 along the second direction is larger than the size of the battery 5 along the second direction, so the two ends of the end plate structure 1 along the second direction protrude from the ends of the battery 5 along the second direction.

[0129] When the fastening band 6 is wrapped around the end plate structure 1 and the multiple batteries 5, there is a certain gap between the fastening band 6 and the end surface of the battery 5 along the second direction, so that the gap can serve as an expansion margin for the battery 5 during the charging process, so as to avoid the battery 5 being restricted by the fastening band 6 in the second direction during the expansion process.

[0130] The end surface (i.e., the larger surface) of the end plate body 11 along the first direction can be in contact with the battery, which also provides a restraining effect on the later expansion of the battery, and can ensure that the flat surface of the battery is in good contact with the end plate body 11 throughout the entire life cycle, thereby improving the cycle life and consistency.

[0131] In addition, an insulating plate may be provided between the fastening belt 6 and the end surface of the battery 5 along the second direction, or an insulating sleeve may be provided on the fastening belt 6 in the second direction to reduce the possibility of a short circuit between the fastening belt 6 and the battery 5 .

[0132] One or more embodiments of the present application also disclose a battery pack. Figure 15 , the battery pack includes the battery module as described in the above embodiment.

[0133] In some embodiments, the battery pack may include at least one battery module and a housing in which the battery module may be mounted. The battery pack may be applied to electrical equipment such as electric vehicles, aircraft, energy storage cabinets, and energy storage containers, without specific limitation herein.

[0134] The beneficial effects of the battery pack of this embodiment relative to the prior art are the same as those of the above-mentioned battery module and will not be described again here.

[0135] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. An end plate structure, characterized in that: The end plate body comprises an end plate body, wherein an installation groove is provided on an end surface of the end plate body, wherein the terminal seat of the battery module is embedded in the installation groove, and the size of the installation groove in a first direction and a second direction are both larger than the size of the terminal seat; the first direction is the width direction of the end plate body, and the second direction is the length direction of the end plate body; A first clamping structure is provided in the mounting groove, and the terminal seat includes a terminal seat body and a second clamping structure. The terminal seat body is clamped with the first clamping structure in the mounting groove through the second clamping structure, and the terminal seat is movable in the mounting groove.

2. The end plate structure according to claim 1, characterized in that: The inner side wall of the installation groove is further provided with an anti-fool structure for limiting the reverse insertion of the terminal seat into the installation groove, and the anti-fool structure is a concave-convex structure.

3. The end plate structure according to claim 1, characterized in that: The end plate body is provided with a plurality of mounting grooves, at least one of which is used for inserting the terminal seat; the bottom wall of at least one mounting groove is provided with a first through hole, which is connected to at least one mounting groove to form a lifting hole, and the lifting hole is used to connect the lifting equipment.

4. The end plate structure according to claim 1, characterized in that: It also includes a support base arranged on the end plate body, and a positioning hole is provided on the support base. The positioning hole is used to connect the wiring harness isolation plate of the battery module through a fastener.

5. The end plate structure according to claim 1, characterized in that: A weight-reducing structure is provided on the end plate body. The weight-reducing structure includes one or more first groove structures. The one or more first groove structures are distributed on the end plate body.

6. The end plate structure according to claim 1, characterized in that: It also includes a first reinforcement structure. The end plate body has a first side surface and a second side surface. The first side surface is used to be fitted with the battery of the battery module, and the first reinforcement structure is arranged on the second side surface.

7. The end plate structure according to claim 6, characterized in that: The first reinforcement structure includes a first reinforcement rib and a second reinforcement rib. The first reinforcement rib and the second reinforcement rib are arranged at an angle, and the intersection of the first reinforcement rib and the second reinforcement rib corresponds to the middle area of ​​the battery.

8. The end plate structure according to claim 1, characterized in that: It also includes a screw mounting portion, a plurality of which are arranged on the end plate body at intervals along the second direction, and the screw mounting portion has a second through hole, and the second through hole of the screw mounting portion is used to connect the screw structure of the liquid cooling plate of the battery module.

9. The end plate structure according to claim 8, characterized in that: A plurality of second groove structures are provided on an end surface of the end plate body away from the terminal seat, and the second groove structures correspond to the positions of the screw mounting parts.

10. The end plate structure according to claim 8, characterized in that: A side wall of the screw mounting portion away from the battery of the battery module is provided with an observation hole, and a side wall of the screw mounting portion facing the battery is a baffle structure.

11. The end plate structure according to claim 8, characterized in that: It also includes a second reinforcement structure, and the second reinforcement structure is provided on the side wall of the screw mounting portion along the second direction.

12. The end plate structure according to claim 8, characterized in that: The screw mounting portion is provided with a limiting groove, and the limiting groove is used to be connected to the fastening belt of the battery module.

13. The end plate structure according to claim 1, characterized in that: The first clamping structure is arranged on the inner side wall of the installation groove, and the second clamping structure includes a clamping plate and a clamping protrusion arranged on the clamping plate. The clamping plate is located in the installation groove, and the clamping protrusion is clamped with the first clamping structure.

14. The end plate structure according to claim 13, characterized in that: The mounting groove is further provided with a protruding structure on the inner side wall having the first clamping structure, and the protruding structure is located above the clamping protrusion.

15. A battery module, characterized in that: It comprises the end plate structure according to any one of claims 1 to 14, and further comprises a plurality of batteries, wherein the plurality of batteries are arranged between two of the end plate structures.

16. The battery module according to claim 15, characterized in that: It also includes fastening belts, and both ends of the end plate structure along the second direction protrude from the ends of the batteries along the second direction; the fastener surrounds the end plate structure and the plurality of batteries.

17. A battery pack, characterized in that: Comprising the battery module according to claim 15 or 16.

18. An energy storage electrical device, characterized in that: Comprising the battery pack as claimed in claim 17.

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