Middle insulating frame and battery module

Abstract

The utility model relates to the technical field of energy storage batteries, in particular to a middle insulating frame and a battery module. The middle insulating frame comprises a plurality of side plates and partition plates, the side plates are encircled to form an accommodating cavity, the edge parts of the partition plates are connected with the inner wall of the accommodating cavity, so that the accommodating cavity is divided into two sub-accommodating cavities which are provided with openings in the end parts and are arranged along the first direction, and the sub-accommodating cavities are used for accommodating single batteries; wherein the side plate is provided with a pole opening for the pole of the battery monomer to extend out. The number of the middle insulation frames and the number of the battery monomers can be freely increased according to the later capacity expansion requirement, disassembly and assembly are free and convenient, and capacity expansion and maintenance are more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage batteries, and in particular to an intermediate insulating frame and a battery module. Background Art

[0002] The existing grouping method of energy storage battery modules is to stack the modules, extrude them through the end plates, and finally use cable ties to wrap and fix them. This grouping method certainly saves costs, but the reliability of the modules will also be reduced, and the loosening and aging of the cable ties will affect the reliability of the modules. In addition, the existing energy storage battery modules mainly adopt a one-time molding process, that is, after the module capacity and voltage platform are determined, they are assembled and produced through the process. The advantage of this is that the product is stable and highly targeted. However, when the energy storage system needs to be expanded in the later stage, due to the large number of strong fixing processes such as welding and riveting used in the modules, it is inconvenient to disassemble and assemble, making expansion and maintenance difficult. Utility Model Content

[0003] The purpose of the present application is to provide an intermediate insulating frame and a battery module to alleviate the problems of existing battery modules that use a large number of strong fixing processes, are inconvenient to disassemble and assemble, and are difficult to expand and maintain.

[0004] In order to achieve this purpose, this application adopts the following technical solutions:

[0005] In a first aspect, the present application provides an intermediate insulating frame, comprising: a side plate and a partition plate, wherein the side plates are multiple and enclose a receiving cavity, and the edge of the partition plate is connected to the inner wall of the receiving cavity to divide the receiving cavity into two sub-receiving cavities with open ends and arranged along a first direction, and the sub-receiving cavities are used to accommodate battery cells;

[0006] The side plate is provided with a pole opening for the pole of the battery cell to extend out.

[0007] Optionally, a pair of ridges spaced apart from each other and extending along the first direction are provided on the outer side surface of the side plate, and the pair of ridges define a cable tie groove for accommodating the cable tie.

[0008] Optionally, a lock assembly is further provided on the outer side surface of the side panel, and the lock assembly includes a lock and a lock body spaced apart along a first direction, and the lock is configured to be fixedly connected to the lock body of an adjacent frame for fixedly connecting two adjacent frames.

[0009] Optionally, the lock body has a protruding portion, and the lock buckle is provided with a limiting hole for the protruding portion to pass through and be engaged.

[0010] Optionally, a wire harness fixing is provided on the outer surface of the side panel, and the wire harness fixing has an installation groove, the installation groove has a bottom wall and two opposite side walls, each side wall is provided with at least one limiting protrusion protruding in a direction perpendicular to the side wall, and a gap is formed between the limiting protrusion and the bottom wall for accommodating the wire harness; the limiting protrusions on the two side walls are staggered and form a wire harness opening for the wire harness to enter.

[0011] Optionally, a heat insulating layer is provided on the partition.

[0012] Optionally, the side plate includes two first side plates and two second side plates, the two first side plates are arranged opposite to each other along the second direction, and each second side plate is connected to the edge portions of the two first side plates to form a receiving cavity with a rectangular cross section;

[0013] Each first side plate is provided with a tie groove and a locking buckle assembly.

[0014] Optionally, the side plate includes two first side plates and two second side plates, the two first side plates are arranged opposite to each other along the second direction, and each second side plate is connected to the edge portions of the two first side plates to form a receiving cavity with a rectangular cross section;

[0015] The pole opening and the harness fixing piece are both located on the outer surface of one of the two second side plates.

[0016] Optionally, a buffer groove is provided on the other of the two second side plates, and a buffer member is provided in the buffer groove.

[0017] In a second aspect, the present application provides a battery module, comprising:

[0018] A battery module comprises a plurality of battery cells, wherein the plurality of battery cells are stacked along a first direction;

[0019] The end insulating frame has a sub-accommodation cavity, and the sub-accommodation cavity is used to accommodate the battery cells at the end of the battery module;

[0020] A binding member is bound to the outside of the plurality of frames along the circumference of the frames;

[0021] An electrical connector, disposed on the outer surface of the side plate and used to electrically connect the poles of two adjacent battery cells;

[0022] and a plurality of the above-mentioned intermediate insulating frames;

[0023] The end insulating frame and the middle insulating frame are connected in sequence, and two adjacent sub-accommodating chambers are enclosed to accommodate a battery cell.

[0024] This application brings at least the following beneficial effects:

[0025] The present application provides an intermediate insulating frame, including: side plates and partitions, the side plates are multiple and enclose a receiving cavity, the edges of the partitions are connected to the inner walls of the receiving cavity to divide the receiving cavity into two sub-receiving cavities with open ends and arranged along a first direction, the sub-receiving cavities are used to accommodate battery cells; wherein, the side plates are provided with pole openings for extending the poles of the battery cells.

[0026] Multiple side panels enclose a storage cavity, and the partition divides the storage cavity into two sub-cavities. Each sub-cavity can accommodate a battery cell. The pole of the battery cell extends from the pole opening on the side panel. After the battery cell is placed, the side panel is bundled and reinforced to improve the reliability of the battery module. The intermediate insulating frame is integrally formed, integrating multiple functions into one, reducing the number of parts and saving costs. In addition, the number of intermediate insulating frames and battery cells can be freely increased according to the later expansion needs. Disassembly and assembly are free and convenient, and expansion and maintenance are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of an intermediate insulating frame provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of a second side panel provided in an embodiment of the present application;

[0030] Figure 3 A partial schematic diagram of a battery module provided in an embodiment of the present application;

[0031] Figure 4 An exploded view of a battery module provided in an embodiment of the present application.

[0032] Illustrations: 100-first side plate; 110-convex ridge; 111-tie groove; 120-lock assembly; 121-lock; 1211-limiting hole; 122-lock body; 1221-protrusion; 200-second side plate; 210-pole opening; 220-mounting groove; 230-limiting protrusion; 240-buffer groove; 250-buffer; 300-partition; 400-battery cell; 500-end insulation frame; 600-bundling piece; 700-electrical connector; 800-connector. DETAILED DESCRIPTION

[0033] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0036] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] Embodiment 1

[0040] The existing energy storage battery module assembly method is to stack the modules, extrude them through the end plates, and finally fix them with cable ties. The main process is a one-time molding process, that is, after the module capacity and voltage platform are determined, they are assembled and produced through the process. The advantage of this is that the product is stable and targeted. However, when the energy storage system needs to be expanded later, due to the large number of strong fixing processes such as welding and riveting used in the modules, it is inconvenient to disassemble and assemble, making expansion and maintenance difficult.

[0041] In view of this, the present embodiment provides an intermediate insulating frame, including: side plates and partitions 300, the side plates are multiple and enclosed to form a accommodating cavity, the edges of the partitions 300 are connected to the inner walls of the accommodating cavity to divide the accommodating cavity into two sub-accommodating cavities with open ends and arranged along a first direction, the sub-accommodating cavities are used to accommodate battery cells 400; wherein, a pole opening 210 is opened on the side plate for the pole of the battery cell 400 to extend out.

[0042] A plurality of side panels enclose a storage cavity, and the partition 300 divides the storage cavity into two sub-cavities. Each sub-cavity can accommodate a battery cell 400. The pole of the battery cell 400 extends from the pole opening 210 on the side panel. After the battery cell 400 is placed, the side panel is bundled and reinforced, which improves the reliability of the battery module. The intermediate insulating frame is integrally formed, integrating multiple functions into one, reducing the number of parts and components, and saving costs. In addition, the number of intermediate insulating frames and battery cells 400 can be freely increased according to the later expansion needs. Disassembly and assembly are free and convenient, and expansion and maintenance are more convenient.

[0043] It should be noted that in this embodiment, the side panels include two first side panels 100 and two second side panels 200. The two first side panels 100 are arranged opposite to each other along the second direction, and each second side panel 200 is connected to the edges of the two first side panels 100 to form a receiving cavity with a rectangular cross section. The first direction is the direction in which the battery cells 400 are stacked, and the second direction is perpendicular to the first direction.

[0044] The first side plate 100 at the top is provided with a plurality of pole openings 210, and the pole openings 210 are adapted to the poles of the battery cells 400. Figure 1 In order to make the intermediate insulating frame more compatible with the battery cell 400, pole openings 210 are provided at the four corners of the first side plate 100. When the battery cell 400 is placed in the sub-accommodation cavity, the pole of the battery cell 400 is located directly below the pole opening 210, which is convenient for subsequent connection and fixation.

[0045] In an optional manner of this embodiment, a pair of ridges 110 spaced apart from each other and extending along the first direction are disposed on the outer side surface of the first side plate 100 , and the pair of ridges 110 define a cable tie groove 111 for accommodating a cable tie.

[0046] See also Figure 1 A pair of convex ribs 110 are arranged at intervals near the top of the first side plate 100, and another pair of convex ribs 110 are arranged at intervals near the bottom of the first side plate 100. A top tie groove 111 is formed between the two top convex ribs 110, and the top tie passes through the top tie groove 111 along the first direction; a bottom tie groove 111 is formed between the two bottom convex ribs 110, and the bottom tie passes through the bottom tie groove 111 along the first direction. The tie groove 111 can help fix the tie to prevent it from falling off later.

[0047] In an optional manner of this embodiment, a lock assembly 120 is further provided on the outer surface of the first side panel 100, and the lock assembly 120 includes a lock 121 and a lock body 122 arranged at intervals along the first direction, and the lock 121 is configured to be fixedly connected to the lock body 122 of an adjacent frame for fixedly connecting two adjacent frames.

[0048] Please continue to see Figure 1 The lock buckle 121 and the lock body 122 are arranged on both sides of the length direction of the first side plate 100 and are arranged at the same height interval along the first side plate 100. The lock buckle 121 is connected to the lock body 122 of the adjacent frame, and the lock body 122 is connected to the lock buckle 121 of the adjacent frame, so that the frame is pre-connected with the two adjacent frames on the left and right. The lock buckle 121 and the lock body 122 can lock the battery cell 400 during module molding to help the battery module molding. One intermediate insulating frame can pre-fix two battery cells 400 at the same time.

[0049] Furthermore, the lock body 122 has a protruding portion 1221 , and the lock buckle 121 is provided with a limiting hole 1211 for the protruding portion 1221 to pass through and be engaged.

[0050] The protrusion 1221 on the lock body 122 passes through and is engaged with the limiting hole 1211 on the lock buckle 121 , so that two adjacent frames are fixedly connected.

[0051] It should be noted that both first side plates 100 are provided with tie grooves 111 and lock components 120. Of course, the lock component 120 may also be provided on only one first side plate 100, as long as the technical purpose of connecting adjacent intermediate insulating frames through the lock component 120 is met.

[0052] In an optional manner of this embodiment, a wiring harness fixing is provided on the outer surface of the second side panel 200, and the wiring harness fixing has an installation groove 220, the installation groove 220 has a bottom wall and two opposite side walls, each side wall is provided with at least one limiting protrusion 230 protruding in a direction perpendicular to the side wall, and a gap is formed between the limiting protrusion 230 and the bottom wall for accommodating the wiring harness; the limiting protrusions 230 on the two side walls are staggered and form a wiring harness opening for the wiring harness to enter.

[0053] See also Figure 1 , two sets of harness fixings are arranged near the middle of the second side plate 200. Three limiting protrusions 230 are arranged at intervals in the installation groove 220, and adjacent limiting protrusions 230 are respectively arranged on two opposite side walls and protrude in opposite directions, so that a wavy installation groove 220 is formed in the harness fixing. The gap between the limiting protrusion 230 and the bottom wall can accommodate the harness, and the limiting protrusions 230 on the two side walls also form a harness opening for the harness to enter. In addition, the harness fixing and the second side plate 200 are integrally formed, eliminating the harness isolation plate accessories in the traditional module, saving costs.

[0054] It should be noted that the pole opening 210 and the harness fixing piece are both located on the outer surface of one of the two second side plates 200 , and a buffer groove 240 is disposed on the other of the two second side plates 200 , and a buffer piece 250 is disposed in the buffer groove 240 .

[0055] See also Figure 2 The two buffer grooves 240 are respectively arranged on both sides of the length direction of the second side plate 200, and the two buffer members 250 are respectively placed in the two buffer grooves 240. The buffer members 250 are preferably foam, and when the battery module stands on the mounting surface, the foam can play a buffering role to alleviate the impact of environmental vibration on the battery module.

[0056] In an optional manner of this embodiment, a heat insulating layer is provided on the partition 300 .

[0057] The thermal insulation layer is preferably a mica paper layer, which can play a positive role in preventing heat diffusion of the battery cell 400.

[0058] In an optional manner of this embodiment, the two first side plates 100, the two second side plates 200 and the partition plate 300 are integrally formed by injection molding. The entire intermediate insulating frame is made by injection molding, and the overall insulation performance is good, which can effectively improve the withstand voltage insulation performance of the battery module.

[0059] Embodiment 2

[0060] The present embodiment provides a battery module, comprising: a battery module, comprising a plurality of battery cells 400, wherein the plurality of battery cells 400 are stacked along a first direction; an end insulating frame 500, having a sub-accommodation cavity, wherein the sub-accommodation cavity is used to accommodate the battery cells 400 at the end of the battery module; a bundling piece 600, bundled on the outside of the plurality of frames along the circumference of the frame; an electrical connector 700, which is arranged on the outer surface of the side plate and is used to electrically connect the poles of two adjacent battery cells 400; and, a plurality of intermediate insulating frames of the first embodiment; wherein the end insulating frame 500 is connected to the intermediate insulating frame in sequence, and two adjacent sub-accommodation cavities are enclosed to accommodate a battery cell 400.

[0061] See also Figure 4 , an end insulating frame 500 is provided at each of the left and right ends of the battery module, and the end insulating frame 500 can accommodate the battery cell 400 at the end of the battery module, and plays the role of closing the battery module; a plurality of intermediate insulating frames are provided between the two end insulating frames 500, and one intermediate insulating frame can fix two battery cells 400 at the same time. The battery cell 400 can be placed in the intermediate insulating frame and the end insulating frame 500 first, and the battery module is pre-connected by connecting the plurality of intermediate insulating frames to each other, and then tied and fixed by the tying piece 600, which can be a binding tape, an adhesive tape, a cable tie, etc.

[0062] The electrical connector 700 is disposed on the outer surface of the second side plate 200 along the first direction, and can electrically connect the poles of two adjacent battery cells 400. The electrical connector 700 may be a bus bar, and the bus bar is connected to the battery cell 400 through the connector 800. Figure 3 The connector 800 is preferably a bolt, and the busbar and the battery cell 400 are connected by bolts. The two can be effectively connected by bolt connection, and the detection harness is pressed between the two, which simplifies the process, does not require welding, and is more convenient for later disassembly and assembly.

[0063] After the battery module is formed as a whole, the busbar is installed, and the detection harness is neatly inserted into the installation slot 220 to complete the assembly of the entire battery module. The position of the battery cell 400 at the output pole is reserved, and the copper busbar is directly locked into the threaded hole of the battery cell 400, and the battery module can be used normally.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An intermediate insulating frame, characterized in that: include: A side plate and a partition, wherein the side plates are multiple and enclose a receiving cavity, and the edge of the partition is connected to the inner wall of the receiving cavity to divide the receiving cavity into two sub-receiving cavities with open ends and arranged along a first direction, and the sub-receiving cavities are used to receive battery cells; Wherein, the side plate is provided with a pole opening for the pole of the battery cell to extend out.

2. The intermediate insulating frame according to claim 1, characterized in that: A pair of convex ridges spaced apart from each other and extending along the first direction are arranged on the outer side surface of the side plate, and the pair of convex ridges define a cable tie groove for accommodating a cable tie.

3. The intermediate insulating frame according to claim 2, characterized in that: A lock assembly is also provided on the outer side surface of the side panel, and the lock assembly includes a lock and a lock body arranged at intervals along the first direction. The lock is configured to be fixedly connected to the lock body of an adjacent frame for fixedly connecting two adjacent frames.

4. The intermediate insulating frame according to claim 3, characterized in that: The lock body has a protruding portion, and the lock buckle is provided with a limiting hole for the protruding portion to pass through and be clamped.

5. The intermediate insulating frame according to claim 1, characterized in that: A wire harness fixing part is arranged on the outer surface of the side panel, and the wire harness fixing part has an installation groove, and the installation groove has a bottom wall and two opposite side walls, and each of the side walls is provided with at least one limiting protrusion protruding in a direction perpendicular to the side wall, and a gap is formed between the limiting protrusion and the bottom wall for accommodating the wire harness; the limiting protrusions on the two side walls are staggered and form a wire harness opening for the wire harness to enter.

6. The intermediate insulating frame according to claim 1, characterized in that: A heat insulation layer is arranged on the partition.

7. The intermediate insulating frame according to claim 3, characterized in that: The side panels include two first side panels and two second side panels, the two first side panels are arranged opposite to each other along the second direction, and each second side panel is connected to the edges of the two first side panels to form the accommodating cavity with a rectangular cross section; Each of the first side panels is provided with the cable tie groove and the locking assembly.

8. The intermediate insulating frame according to claim 5, characterized in that: The side panels include two first side panels and two second side panels, the two first side panels are arranged opposite to each other along the second direction, and each second side panel is connected to the edges of the two first side panels to form the accommodating cavity with a rectangular cross section; The pole opening and the harness fixing member are both located on the outer surface of one of the two second side plates.

9. The intermediate insulating frame according to claim 8, characterized in that: A buffer groove is arranged on the other of the two second side plates, and a buffer member is arranged in the buffer groove.

10. A battery module, characterized in that: include: A battery module, comprising a plurality of battery cells, wherein the plurality of battery cells are stacked along the first direction; An end insulating frame having a sub-accommodation cavity, wherein the sub-accommodation cavity is used to accommodate the battery cell at the end of the battery module; A binding member, bound to the outside of the plurality of frames along the circumference of the frame; A plurality of intermediate insulating frames according to any one of claims 1 to 9; and an electrical connector, which is disposed on the outer surface of the side plate and is used to electrically connect the poles of two adjacent battery cells; The end insulating frame and the middle insulating frame are connected in sequence, and two adjacent sub-accommodating cavities are enclosed to accommodate one battery cell.

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