Sheet metal end plate of battery module

Abstract

The utility model provides a metal plate end plate of a battery module, which comprises a first metal plate, a second metal plate and a third metal plate, the first metal plate and the second metal plate are oppositely arranged, the outer edge of the first metal plate is bent towards the second metal plate, and the outer edge of the third metal plate is bent towards the third metal plate. The first metal plate and the second metal plate are oppositely arranged to seal a gap between the first metal plate and the second metal plate; the third sheet metal plate is located between the first sheet metal plate and the second sheet metal plate and at least provided with an abutting face abutting against the first sheet metal plate and an inserting end inserted into the second sheet metal plate. The metal plate end plate adopts a three-layer combined structure and is high in bending resistance and torsion resistance, so that the thickness of the metal plate end plate can be greatly reduced compared with a traditional metal plate end plate; the metal plate end plate is provided with the first through hole and the third through hole which are used for installing the module, the second through hole used for pulling the side pulling plate and the hoisting hole used for hoisting the module, functions are complete, the appearance is attractive, the mode that the side pulling plate is fixed through the end plate and the screw is added, and grouping is more convenient and faster.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrochemistry energy technology field especially is involved in a sheet metal end plate of battery module. BACKGROUND

[0002] At present, square battery is widely used in energy industry, such as electric vehicle, engineering vehicle, standby power supply and so on. Battery module is the most basic system unit of battery system, which includes battery cell, battery cell includes pole group, pole group is assembled by pole sheet, with the circulation of battery module, pole sheet expansion will cause pole group expansion, deformation, and then lead to battery cell and module expansion force, module expansion will cause size out of tolerance, damage the structure frame of module, affect the service life of module, and seriously cause fire; The strength and size of end plate greatly influence the performance and installation of module, thereby affecting the whole battery system.

[0003] Traditional square battery module end plate mainly adopts aluminum profile extrusion, cast aluminum or aluminum material machining forming. Aluminum profile extrusion and cast aluminum forming need to make mould, and have minimum order quantity requirement, once the cost is great, which is not conducive to early sample or small batch production; And aluminum material machining forming greatly wastes materials, and has long processing time and high cost, which is difficult to quickly process and form for specific mechanism. In addition, the thickness of traditional aluminum end plate is about 20mm, which is large, and it is difficult to meet the production demand of high module size requirement, and thinning the thickness of end plate greatly influences the strength of end plate, and it is difficult to guarantee the performance of module.

[0004] In order to solve the above problems, more and more end plates adopt sheet metal end plate, which has high material utilization rate and can be quickly customized according to actual demand. However, the current sheet metal end plate structure is simple, which cannot overcome the deformation defect of bent sheet metal, has poor mechanical properties, and generally has large thickness and poor appearance. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a sheet metal end plate for a battery module to solve the problems in the above background.

[0006] The utility model adopts the technical scheme of a sheet metal end plate of battery module, which comprises a first sheet metal plate, a second sheet metal plate and a third sheet metal plate, the first sheet metal plate and the second sheet metal plate are oppositely arranged, the outer edge of the first sheet metal plate is bent towards the second sheet metal plate to close the gap between the first sheet metal plate and the second sheet metal plate, and the third sheet metal plate is located between the first sheet metal plate and the second sheet metal plate and has at least an abutting surface abutting the first sheet metal plate and a plug-in end plug-in the second sheet metal plate.

[0007] Further, the first sheet metal plate comprises a first plate body, a plurality of first folded edges and a plurality of second folded edges, the first plate body comprises a first large face and a second large face opposite to each other, the first large face faces the second sheet metal plate; the first folded edges and the second folded edges are arranged alternately on the circumference of the first large face and are fixedly connected.

[0008] Further, the second folded edges are arranged at the top and bottom ends of the first large face respectively, and a first through hole is arranged on each of the second folded edges, the first through hole can be used to install a fixing bolt of the battery module.

[0009] Further, the second sheet metal plate comprises a second plate body and a third folded edge, the second plate body comprises a third large face and a fourth large face opposite to each other, the third large face faces the first sheet metal plate; the third folded edge is bent from the second sheet metal plate to the first sheet metal plate, and the third folded edge is parallel to the second plate body.

[0010] Further, a plurality of first plug-in holes and a plurality of lifting holes are arranged on the second plate body, the first plug-in holes are connected to the third sheet metal plate, and the lifting holes can assist in lifting the battery module.

[0011] Further, a plurality of second plug-in holes and a plurality of second through holes are arranged on the third folded edge, the second plug-in holes are connected to the third sheet metal plate, and a nut part corresponding in position to the second through holes is arranged on the third large face.

[0012] Further, the third sheet metal plate comprises a third plate body, a fourth folded edge and a fifth folded edge, the third plate body comprises a fifth large face and a sixth large face opposite to each other, the fifth large face abuts against the first sheet metal plate; the fourth folded edge and the fifth folded edge are arranged at the top and bottom ends of the third plate body respectively, and are bent from the sixth large face to the second sheet metal plate; a first plug-in block and a second plug-in block are arranged on the fourth folded edge and the fifth folded edge, the first plug-in block is connected to the first plug-in hole, and the second plug-in block is connected to the second plug-in hole.

[0013] Further, a third through hole is arranged on the fourth folded edge and the fifth folded edge, the third through hole can be used to install a fixing bolt of the battery module.

[0014] The metal plate end plate has the beneficial effects that the metal plate end plate adopts a three-layer combined structure, has great bending resistance and torsion resistance, and thus the thickness of the metal plate end plate can be greatly reduced, and the thickness can be as low as 10 mm, which is reduced by half compared with the thickness of a commonly used aluminum profile end plate with a thickness of 20 mm. The metal plate end plate has a first through hole and a third through hole for module installation, a second through hole for side pull plate connection, and a lifting hole for module lifting, and has complete functions. The metal plate end plate provided by the utility model is beautiful in appearance and close to the appearance of an aluminum profile end plate. The commonly used profile end plate and the battery cell form two module modes of an end plate-steel belt and an end plate-welded side pull plate. The metal plate end plate in the utility model adds the mode of an end plate-screw fixed side pull plate to the original grouping mode, and grouping is more convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a whole structure diagram of the embodiment of the utility model;

[0016] Figure 2 is an explosion view of the embodiment of the utility model at a first visual angle;

[0017] Figure 3 is an explosion view of the embodiment of the utility model at a second visual angle;

[0018] Figure 4 is a structure diagram of a first metal plate in the embodiment of the utility model;

[0019] Figure 5 is a structure diagram of a third metal plate in the embodiment of the utility model.

[0020] In the drawings:

[0021] 100, first metal plate; 110, first plate body; 111, first large face; 112, second large face; 120, first folded edge; 130, second folded edge; 131, first through hole;

[0022] 200, second metal plate; 210, second plate body; 211, third large face; 212, fourth large face; 213, first plug-in hole; 214, lifting hole; 220, third folded edge; 221, second through hole; 222, second plug-in hole;

[0023] 300, third metal plate; 310, third plate body; 311, fifth large face; 312, sixth large face; 320, fourth folded edge; 330, fifth folded edge; 340, first plug-in block; 350, second plug-in block; 360, avoiding groove; 370, third through hole;

[0024] 400, nut part. DETAILED DESCRIPTION

[0025] The technical solutions of the embodiments of the utility model will be described in detail below with reference to the drawings.

[0026] In the description of the embodiments of the utility model, it should be understood that the positions or location relations indicated by the terms "top", "bottom" and the like are based on the positions or location relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as limiting the utility model. In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrange", "connect" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0027] Reference is made to the drawings Figures 1-5 The embodiment of the utility model provides a kind of sheet metal end plate of battery module, it includes first sheet metal plate 100, second sheet metal plate 200 and third sheet metal plate 300, first sheet metal plate 100 and second sheet metal plate 200 are oppositely arranged, the outer edge of first sheet metal plate 100 is bent towards second sheet metal plate 200, to close the gap between first sheet metal plate 100 and second sheet metal plate 200;Third sheet metal plate 300 is located between first sheet metal plate 100 and second sheet metal plate 200, at least has the abutting surface of abutting first sheet metal plate 100 and the insertion end of inserting second sheet metal plate 200.Sheet metal end plate adopts three-layer combination structure, third sheet metal plate 300 is used to provide support to first sheet metal plate 100 and second sheet metal plate 200, improve the bending and torsion resistance of sheet metal end plate.

[0028] Taking square battery module as an example, in the sheet metal end plate provided by the embodiment, first sheet metal plate 100 includes first plate body 110, two first folded edges 120 and two second folded edges 130, first plate body 110 includes opposite first large face 111 and second large face 112, first large face 111 is towards second sheet metal plate 200;First folded edge 120 and second folded edge 130 are alternately arranged and fixedly connected on the circumference of first large face 111, i.e. two groups of first folded edges 120 are located at one group of opposite side ends of first large face 111 respectively, and two groups of second folded edges 130 are located at top end and bottom end of first large face 111 respectively;First folded edge 120 and second folded edge 130 are integrally formed with first sheet metal plate 100, first folded edge 120 and second folded edge 130 are formed by sheet metal bending process, and adjacent first folded edge 120 and second folded edge 130 are fixed by welding.Two groups of first folded edges 120 and two groups of second folded edges 130 build square cavity for accommodating second sheet metal plate 200 and / or third sheet metal plate 300.

[0029] In order to facilitate the fixation of the battery module in the battery box, a first through hole 131 for installing a fixing bolt for fixing the battery module can be arranged on the second folding edge 130. In the embodiment, three first through holes 131 are arranged on each second folding edge 130, and the positions of the first through holes 131 on the two groups of second folding edges 130 correspond to each other. However, in actual application, the number of first through holes 131 can be determined according to the actual total weight of the module and the application working condition, and is not limited herein.

[0030] The second large face 112 of the first sheet metal plate 100 is a complete plane, which is in contact with the side face of the battery cell inside the module and extrudes the battery cell. In order to ensure that the extrusion force of the sheet metal end plate on the battery cell is uniform and the battery cell is not damaged, the second large face 112 is a whole structure without weight-reducing holes or weight-reducing grooves.

[0031] In the sheet metal end plate provided in the embodiment, the second sheet metal plate 200 includes a second plate body 210 and two groups of third folding edges 220. The second plate body 210 includes opposite third and fourth large faces 211 and 212, and the third large face 211 faces the first sheet metal plate 100. The third folding edge 220 is bent from the second sheet metal plate 200 to the first sheet metal plate 100, and is parallel to the second plate body 210. More specifically, the two groups of third folding edges 220 are respectively located at different side ends of the second plate body 210 and are integrally formed with the second plate body 210 by a sheet metal bending process. During installation, the second sheet metal plate 200 is placed in the square cavity surrounded by the first and second folding edges 120 and 130, the side end of the second sheet metal plate 200 away from the second plate body 210 is welded and fixed to the inner wall of the first folding edge 120, and the top and bottom ends of the second sheet metal plate 200 are respectively welded and fixed to the inner wall of the second folding edge 130, thereby forming a stable sheet metal end plate.

[0032] In order to match the configuration of the second sheet metal plate 200, the end of the second folded edge 130 away from the first large surface 111 is configured into a third folded edge 220 and a bent shape of the second sheet metal plate 200. A plurality of second through holes 221 are arranged on the third folded edge 220. Nut members 400 corresponding to the positions of the second through holes 221 are arranged on the third large surface 211. From the perspective of the outside of the battery module, the third folded edge 220 is closer to the first sheet metal plate 100 relative to the second plate body 210. Thus, the sheet metal end plate forms a certain degree of depression on the side of the fourth large surface 212, which is just used to install the side pull plate of the module. The long end of the side pull plate is bent and attached to the third folded edge 220, and is fastened by bolt connection with the second through holes 221 and the nut members 400. On the one hand, the long end of the side pull plate is screwed to the outside of the third folded edge 220, which can provide extrusion pre-tightening to the battery cells in the battery module, so that the battery module structure after installation is compact. On the other hand, the end of the side pull plate is flush with the fourth large surface 212, so that the outer surface of the battery module is flat and beautiful. Optionally, the nut member 400 can be a square nut, which is a standard component in the industry. The square nut is fixed on the third large surface 211 by welding. Of course, components with the same function such as press-in nuts and pull-in nuts can also be selected according to requirements.

[0033] The width of the first folded edge 120, the second folded edge 130, and the third folded edge 220, the degree of depression of the third folded edge 220 relative to the fourth large surface 212, and the thickness of the first plate body 110 and the second plate body 210 can be selected according to the size requirements and strength requirements of the actual battery module. Here, no more specific limitations are made. The sheet metal bending process uses cold-rolled steel sheets, and the specific parameters such as material and size are not limited here.

[0034] Each third folded edge 220 is provided with three second through holes 221, and each through hole is provided with a corresponding nut member 400. However, in actual application, the number of second through holes 221 and nut members 400 can be determined according to the actual total weight of the module and the application working condition. Here, no limitation is made.

[0035] The third sheet metal plate 300 comprises a third plate body 310, a fourth folded edge 320 and a fifth folded edge 330. The third plate body 310 comprises opposite fifth and sixth large faces 311 and 312, and the fifth large face 311 abuts against the first plate body 110. The fourth and fifth folded edges 320 and 330 are integrally formed with the third plate body 310 and are respectively arranged at the top and bottom ends of the third plate body 310 and are bent from the sixth large face 312 towards the second sheet metal plate 200 by using a sheet metal bending process. The fourth and fifth folded edges 320 and 330 are respectively provided with a first and second insertion block 340 and 350. The first insertion block 340 corresponds to the second plate body 210, and the second insertion block 350 corresponds to the third folded edge 220. The second plate body 210 is provided with a first insertion hole 213 for mounting the first insertion block 340, and the third folded edge 220 is provided with a second insertion hole 222 for mounting the second insertion block 350. The insertion blocks and the insertion holes are nested with each other, which can overcome the deformation of the fourth and fifth folded edges 320 and 330, improve the support strength of the third sheet metal plate 300, and ensure that the cavity between the first and second sheet metal plates 100 and 200 is supported by the third sheet metal plate 300, thereby improving the bending and torsional strength of the sheet metal end plate.

[0036] During installation, the fifth large face 311 is positioned and welded on the first large face 111, then the first insertion block 340 is inserted into the first insertion hole 213 and welded, and the second insertion block 350 is inserted into the second insertion hole 222 and welded. The points are tightly fixed by welding, which can effectively improve the structural stability of the sheet metal end plate.

[0037] As shown in the drawings, two groups of third sheet metal plates 300 are arranged between the first and second sheet metal plates 100 and 200. The two groups of third sheet metal plates 300 are evenly arranged in the height direction of the sheet metal end plate. Each group of third sheet metal plates 300 is respectively provided with three groups of first insertion blocks 340 and two groups of second insertion blocks 350. Each group of first insertion blocks 340 has two first insertion blocks 340 arranged on the fourth and fifth folded edges 320 and 330, respectively. Each group of second insertion blocks 350 has two second insertion blocks 350 arranged on the fourth and fifth folded edges 320 and 330, respectively. The two groups of second insertion blocks 350 are respectively located at the outermost sides of the third sheet metal plates 300, so as to correspond to different third folded edges 220 and improve the connection stability with the second sheet metal plate 200. However, the number of the first and second insertion blocks 340 and 350, the first and second insertion holes 213 and 222 can be determined according to the actual total weight of the module and the application working condition, which is not limited herein.

[0038] And, the width of the fourth folded edge 320 and the fifth folded edge 330 can be adjusted according to the distance between the first sheet metal plate 100 and the second sheet metal plate 200, and the avoidance groove 360 is arranged between the first insertion block 340 and the second insertion block 350 on the fourth folded edge 320 and the fifth folded edge 330 respectively, so as to avoid the connecting recessed part of the third folded edge 220 and the second plate body 210, so that the parts of the second sheet metal plate 200 and the third sheet metal plate 300 are closely fitted, and the bending and torsional strength of the sheet metal end plate is improved.

[0039] In addition, the third through hole 370 is also arranged on the fourth folded edge 320 and the fifth folded edge 330, which corresponds to the position of the first through hole 131 and is the same size, so that the fixing bolt for fixing the battery module can penetrate the inside of the sheet metal end plate from the top of the sheet metal end plate, thereby improving the connection stability.

[0040] The second plate body 210 can also be provided with a plurality of lifting holes 214, and the drawing of the embodiment exemplarily shows that the lifting holes 214 can be uniformly distributed in two in the horizontal direction on the second plate body 210 and are configured in a waist hole shape, so as to assist the lifting of the battery module.

[0041] Compared with the prior art, the sheet metal end plate has the following beneficial effects: the sheet metal end plate adopts a three-layer combined structure, has high bending and torsional strength, and thus the thickness of the sheet metal end plate can be greatly reduced and can be as low as 10 mm, which is half of the thickness of the commonly used aluminum profile 20 mm thick end plate. The sheet metal end plate has the first through hole 131 and the third through hole 370 for module installation, the second through hole 221 for side pull plate connection, and the lifting hole 214 for module lifting, and the sheet metal end plate has complete functions. The sheet metal end plate has an attractive appearance and is close to the appearance of the aluminum profile end plate. The commonly used profile end plate and the battery cell form two forms of end plate-steel belt and end plate-welded side pull plate, and the sheet metal end plate in the utility model adds the form of end plate-screw fixed side pull plate on the basis of the original grouping mode, and the grouping is more convenient and fast.

[0042] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

[0043] The above is the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the utility model, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A sheet metal end plate for a battery module, characterized in that, The assembly includes a first sheet metal plate, a second sheet metal plate, and a third sheet metal plate. The first sheet metal plate and the second sheet metal plate are arranged opposite to each other. The outer edge of the first sheet metal plate is bent toward the second sheet metal plate to close the gap between the first sheet metal plate and the second sheet metal plate. The third sheet metal plate is located between the first sheet metal plate and the second sheet metal plate and has at least an abutting surface that abuts against the first sheet metal plate and an inserting end that inserts into the second sheet metal plate.

2. The sheet metal end plate of the battery module according to claim 1, characterized in that, The first sheet metal plate includes a first plate body, a plurality of first folded edges and a plurality of second folded edges. The first plate body includes a first large surface and a second large surface opposite to each other, with the first large surface facing the second sheet metal plate. The first folded edges and the second folded edges are alternately arranged and fixedly connected on the perimeter of the first large surface.

3. The sheet metal end plate of the battery module according to claim 2, characterized in that, The second folded edge is respectively located at the top and bottom ends of the first large surface, and a first through hole is provided thereon. The first through hole can be used to install a fixing bolt for fixing the battery module.

4. The sheet metal end plate of the battery module according to any one of claims 1-3, characterized in that, The second sheet metal plate includes a second plate body and a third folded edge. The second plate body includes a third large surface and a fourth large surface that are opposite each other. The third large surface faces the first sheet metal plate. The third folded edge is bent from the second sheet metal plate toward the first sheet metal plate and is parallel to the second plate body.

5. The sheet metal end plate of the battery module according to claim 4, characterized in that, The second plate body has a plurality of first insertion holes and a plurality of lifting holes. The first insertion holes are connected to the third sheet metal plate, and the lifting holes can assist in the lifting of the battery module.

6. The sheet metal end plate of the battery module according to claim 5, characterized in that, The third folded edge is provided with a plurality of second insertion holes and a plurality of second through holes. The second insertion holes are connected to the third sheet metal plate. Nuts corresponding to the positions of the second through holes are provided on the third large surface.

7. The sheet metal end plate of the battery module according to claim 6, characterized in that, The third sheet metal plate includes a third plate body, a fourth folded edge, and a fifth folded edge. The third plate body includes a fifth large surface and a sixth large surface, with the fifth large surface abutting against the first sheet metal plate. The fourth folded edge and the fifth folded edge are respectively located at the top and bottom ends of the third plate body and are bent towards the second sheet metal plate from the sixth large surface. A first insertion block and a second insertion block are provided on the fourth folded edge and the fifth folded edge. The first insertion block is connected to the first insertion hole, and the second insertion block is connected to the second insertion hole.

8. The sheet metal end plate of the battery module according to claim 7, characterized in that, The fourth and fifth folded edges are provided with a third through hole, which can be used to install a fixing bolt for fixing the battery module.

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