End plate structure of battery module

Abstract

The utility model relates to the technical field of batteries, in particular to an end plate structure of a battery module, which comprises an end plate formed by aluminum extrusion, the end plate is provided with a mounting surface, the mounting surface is provided with at least two parallel limiting ribs, each limiting rib is provided with at least two notches, and the notches are used for limiting and mounting a steel belt. According to the end plate, an extrusion forming mode is adopted, meanwhile, the limiting ribs are arranged on the mounting surface of the end plate, and the notches are formed in the limiting ribs, so that the whole battery module can be fixed and high in structural strength through mounting of a plurality of steel belts, on one hand, the expansion force for assembling a plurality of battery cells is conveniently restrained, and on the other hand, the end plate is simple in structure and relatively few in later processing procedures; and the die and batch production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an end plate structure of a battery module. Background Art

[0002] Lithium batteries, as a representative application of clean energy, are being promoted in various countries. Among them, square power aluminum shell battery cells are widely used in home and industrial energy storage products. Battery modules are the unit parts of home and industrial energy storage products. The end plates in them also play a very important role in the battery module structure. However, most of the existing end plates have complex structures, numerous manufacturing processes, and high mold investment costs and subsequent maintenance costs, resulting in high mass production costs. Utility Model Content

[0003] The purpose of the present invention is to provide an end plate structure for a battery module, aiming at the deficiencies in the above-mentioned prior art and to solve the technical problem that most of the existing end plates have complex structures, resulting in high batch production costs.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A battery module end plate structure includes two end plates formed by aluminum extrusion. The end plates are provided with a mounting surface. The mounting surface is provided with at least two mutually parallel limiting ribs. The limiting ribs are provided with at least two notches for limiting the installation of steel strips.

[0006] The utility model is further configured as follows: the mounting surface is further provided with at least two relatively large holes, and the large holes are used for the end plate to carry the battery core module.

[0007] The utility model is further configured as follows: the mounting surface is further provided with at least two symmetrical small holes, and the small holes are used for hoisting the battery core module on the end plate.

[0008] The utility model is further configured as follows: the end plate is further provided with a fitting surface, and the fitting surface is symmetrical and parallel to the installation surface.

[0009] The utility model is further configured as follows: the end plate is further provided with a connecting surface, the connecting surface is respectively connected to the fitting surface and the installation surface, and the connecting surface is vertically connected to the installation surface.

[0010] The utility model is further configured as follows: the connection surface is provided with two symmetrical first fixing holes, and the first fixing holes are used for fixing the battery core module.

[0011] The utility model is further configured as follows: the connection surface is further provided with two symmetrical second fixing holes, and the second fixing holes are used for installing the pressure strip.

[0012] The present invention is further configured as follows: the connecting surface is further provided with at least relatively symmetrical third fixing holes, and the third fixing holes are used for installing the plastic seat.

[0013] The utility model is further configured as follows: a reinforcing rib is connected between the second fixing hole and the third fixing hole.

[0014] The utility model is further configured as follows: the end plate is a hollow structure.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The utility model includes an end plate formed by aluminum extrusion, the end plate being provided with a mounting surface, the mounting surface being provided with at least two mutually parallel limiting ribs, the limiting ribs being provided with at least two notches, the notches being used to limit the mounting steel strips. The end plate of the present application is formed by extrusion, and multiple limiting ribs are provided on the mounting surface of the end plate, and the limiting ribs have multiple notches, which can be installed through multiple steel strips, thereby fixing the entire battery module and providing high structural strength. On the one hand, it is convenient to restrain the expansion force of the assembly of multiple battery cells, and on the other hand, the end plate structure is simple, and the post-processing process is relatively simple, which reduces the mold and batch production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is one of the overall structural diagrams of the utility model;

[0019] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the utility model installed in a battery module.

[0021] The reference numerals used in the above drawings are as follows:

[0022] 1-end plate, 11-mounting surface, 111-limiting rib, 112-notch, 113-large hole, 114-small hole, 12-fitting surface, 13-connecting surface, 131-first fixing hole, 132-second fixing hole, 133-third fixing hole, 134-reinforcement rib;

[0023] 2-Steel belt, 3-Battery cell module, 4-Pressing strip, 5-Plastic seat. DETAILED DESCRIPTION

[0024] In the description of this application, the term "at least two" refers to more than two (including two), and similarly, "plurality" refers to more than two (including two). The technical terms "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Terms such as "install", "connect", "connect", and "fix" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0025] In the description of this application, the orientations or positional relationships indicated by technical terms such as "center", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this 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. Therefore, they cannot be understood as limitations on the embodiments of this application.

[0026] In order to more clearly understand the above-mentioned objectives, technical solutions and advantages of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application, so as to understand in detail how to solve the problems raised in the above-mentioned background technology.

[0027] It should be noted that the end plate 1 structure of the present invention is applied to the battery module. In this embodiment, the end plate 1 structure can be adapted to various sizes of battery cells according to actual needs, and corresponding end plate 1 structures can also be produced according to different battery module models; secondly, Figure 3 As shown, the battery module in this embodiment includes an end plate 1, a steel strip 2, a battery cell module 3, a pressure strip 4, a plastic seat 5, etc. At the same time, the battery cell module 3 is composed of multiple single battery cells. The bottom and side surfaces of the battery cell module 3 are placed with a bottom plate and a side plate to cooperate with the pressure strip 4 and the end plate 1 to form a frame structure, which is convenient for bundling and fixing the battery cell module 3, etc.

[0028] like Figure 1 and Figure 3 As shown, the utility model provides an end plate 1 structure of a battery module, including two end plates 1 made of aluminum extrusion, the end plate 1 is provided with a mounting surface 11, the mounting surface 11 is provided with at least two mutually parallel limiting ribs 111, the limiting rib 111 is provided with at least two notches 112, and the notches 112 are used to limit the installation of the steel belt 2.

[0029] Specifically, including but not limited to, the material of the end plate 1 in this embodiment is selected from light-density, high-strength aluminum alloy, and is made of aluminum extrusion molding, the process is simple to manufacture, and the aluminum alloy strip can be extruded and then cut according to the required length, thereby quickly forming the end plate 1 structure corresponding to different types of battery modules; at the same time, two symmetrical limiting ribs 111 are set near the edges of both sides of the mounting surface 11 of the end plate 1, and the cross-section of the limiting rib 111 is a rectangular, trapezoidal and arc-shaped one to ensure that the limiting rib 111 can be flush with the contact surface of the shell when the battery module 3 is installed. In addition, the limiting rib 111 can be formed into a plurality of convex The notches 112 are formed between the two adjacent convex sections, and the steel strip 2 is limited by the notches 112, which can effectively prevent the steel strip 2 from moving and deflecting after being subjected to force, thereby causing failure in fastening the battery module 3. At the same time, the edges on both sides of the mounting surface 11 and the steel strip 2 are arranged to be rounded, which can ensure that the steel strip 2 is tightly fitted with the end plate 1 after being subjected to force, and avoid the steel strip 2 from breaking and failing due to stress generated for a long time after the battery module 3 is suspended in the air; finally, with the development of intelligent and automated aluminum extrusion molding technology, the end plate 1 of this embodiment has a simple structure and is suitable for mass production, so as to improve production efficiency and product quality stability.

[0030] Through the above solution, the end plate 1 has high structural strength and simple structure, which is conducive to restraining the expansion force of the battery module 3 when installed in the battery module, reducing the subsequent processing process and lowering the mold and batch production costs.

[0031] As a specific implementation method of the improvement, Figure 1 As shown, the mounting surface 11 is further provided with at least two symmetrical large holes 113 , and the large holes 113 are used for the end plate 1 to carry the battery cell module 3 .

[0032] Specifically, including but not limited to, the large hole 113 of this embodiment is a horizontally arranged arc structure, and there are two large holes 113. The two large holes 113 are respectively close to the limiting ribs 111 on both sides of the installation surface 11. The large hole 113 is set for manual transportation of the battery cell module 3. Then, when the battery cell module 3 and the two end plates 1 are assembled and installed, one or two staff members can carry it from both sides of the battery cell module 3. It is worth noting that the interior of the end plate 1 corresponding to the large hole 113 is a hollow structure to avoid unnecessary damage to the staff during transportation.

[0033] Through the above solution, the provision of the large hole 113 can facilitate the transportation and transfer of the installed battery cell module 3.

[0034] As an improved specific implementation, the mounting surface 11 is further provided with at least two symmetrical small holes 114 , and the small holes 114 are used for the end plate 1 to hang the battery module 3 .

[0035] Specifically, including but not limited to, in this embodiment, the small hole 114 is a vertically arranged arc-shaped lifting hole, there are two small holes 114, and the two small holes 114 are respectively arranged below the large hole 113. The small hole 114 is used for automatic transportation of the battery cell module 3. Then, when the battery cell module 3 and the two end plates 1 are assembled and installed, they can be transported by inserting the hook into the small hole 114. It is worth noting that the interior of the end plate 1 where the small hole 114 is set is a hollow structure to avoid damage to the internal structure of the end plate 1 by the hook during transportation.

[0036] Through the above solution, the provision of the small holes 114 can further facilitate the automated transportation and transfer of the assembled battery cell modules 3 to meet the needs of subsequent production.

[0037] As a specific implementation method of the improvement, Figure 2 and Figure 3 As shown, the end plate 1 is further provided with a fitting surface 12 , which is symmetrical and parallel to the mounting surface 11 .

[0038] Specifically, including but not limited to, the end plate 1 is a rectangular structure, the mounting surface 11 is in contact with the outer shell of the battery module, the fitting surface 12 is in contact with the side panel of the battery cell module 3, the fitting surface 12 is symmetrical and opposite to the mounting surface 11, and the fitting surface 12 is a horizontal flat surface.

[0039] Through the above solution, the bonding surface 12 is bonded to the side plate of the battery cell module 3, which can ensure that the end plate 1 is fastened to the battery cell module 3 under the action of the steel belt 2 and reduce the mutual friction between the two.

[0040] As a specific implementation method of the improvement, Figure 1 and Figure 2 As shown, the end plate 1 is further provided with a connecting surface 13 , which is connected to the fitting surface 12 and the mounting surface 11 respectively, and the connecting surface 13 is vertically connected to the mounting surface 11 .

[0041] Specifically, including but not limited to, in this embodiment, there are two connecting surfaces 13, and the two connecting surfaces 13 are respectively connected to the two ends of the mounting surface 11 and the fitting surface 12. The connecting surface 13 is the top surface or the bottom surface of the end plate 1. Based on this, the connecting surface 13 is perpendicular to the mounting surface 11 and the fitting surface 12 respectively.

[0042] Through the above solution, the connection surface 13 can be provided with various matching structures or other components can be installed, thereby assisting in fixing the cell module 3 and the entire battery module, thereby enhancing the scalability of the end plate 1.

[0043] As a specific implementation method of the improvement, Figure 1 and Figure 2As shown, the connection surface 13 is provided with two symmetrical first fixing holes 131 , and the first fixing holes 131 are used to fix the battery module 3 .

[0044] Specifically, including but not limited to, the first fixing hole 131 is an elliptical through hole, the two first fixing holes 131 are symmetrically distributed, and the first fixing holes 131 are arranged near the edges on both sides of the end plate 1, and the first fixing holes 131 pass through the entire end plate 1. At the same time, installing bolts on the first fixing holes 131 can further ensure the fixation of the battery module 3.

[0045] As a specific implementation method of the improvement, Figures 1 to 3 As shown, the connecting surface 13 further defines two symmetrical second fixing holes 132 , which are used to install the pressure strip 4 .

[0046] Specifically, including but not limited to, in this embodiment, the second fixing hole 132 is a Y-shaped screw hole, which can simplify the mold processing difficulty and process, thereby improving the service life of the mold, and the two second fixing holes 132 are symmetrically distributed, and the second fixing hole 132 is arranged close to the center of the connecting surface 13. The second fixing hole 132 also runs through the entire fixing hole, so that the production cost is reduced. Since there is a pressure strip 4 between the two end plates 1, the pressure strip 4 is used to press and fasten the top of the battery cell module 3, and the pressure strip 4 is a bent structure. Based on this, when the pressure strip 4 is fixed to the second fixing hole 132 by screws, it can cooperate with the two end plates 1 and the bottom plate to complete the encirclement of the battery cell module 3, and can ensure the fixation of the battery cell module 3.

[0047] As a specific implementation method of the improvement, Figures 1 to 3 As shown, the connecting surface 13 is further provided with at least symmetrical third fixing holes 133 , and the third fixing holes 133 are used for mounting the plastic seat 5 .

[0048] Specifically, including but not limited to, in this embodiment, the third fixing hole 133 is a triangle, rectangle, or arc shape, and there are two third fixing holes 133, each third fixing hole 133 is arranged between the first fixing hole 131 and the second fixing hole 132, and the third shareholder hole is installed with a plastic seat 5, and a triangle, rectangle, or arc-shaped convex bulge matching the third fixing hole 133 is provided under the plastic seat 5, so that the convex bulge is inserted into the third fixing hole 133, thereby realizing the limited fixation of the plastic seat 5.

[0049] As a specific implementation method of the improvement, Figure 1 and Figure 2 As shown, a reinforcing rib 134 is connected between the second fixing hole 132 and the third fixing hole 133 ; the provision of the reinforcing rib 134 can be used to reinforce the structure of the end plate 1 , increase the reliability of the connection, and ensure the structural stability of the end.

[0050] As a specific implementation of the improvement, the end plate 1 has a hollow structure, which can save raw materials, reduce weight and cost, and facilitate the assembly and automated production of the end plate 1.

[0051] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above-described embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that do not depart from the principles of the present invention are within the scope of protection of the present invention.

Claims

1. An end plate structure of a battery module, characterized in that: It comprises two end plates formed by aluminum extrusion, wherein the end plates are provided with a mounting surface, the mounting surface is provided with at least two mutually parallel limiting ribs, the limiting ribs are provided with at least two notches, and the notches are used for limiting the installation of steel belts.

2. The end plate structure of a battery module according to claim 1, characterized in that: The mounting surface is further provided with at least two symmetrical large holes, and the large holes are used for the end plate to carry the battery cell module.

3. The end plate structure of a battery module according to claim 2, characterized in that: The mounting surface is further provided with at least two symmetrical small holes, which are used for the end plate to hang the battery core module.

4. The end plate structure of a battery module according to claim 3, characterized in that: The end plate is further provided with a fitting surface, which is symmetrical and parallel to the mounting surface.

5. The end plate structure of a battery module according to claim 4, characterized in that: The end plate is further provided with a connecting surface, which is respectively connected to the fitting surface and the mounting surface, and the connecting surface is vertically connected to the mounting surface.

6. The end plate structure of a battery module according to claim 5, characterized in that: The connection surface is provided with two symmetrical first fixing holes, and the first fixing holes are used to fix the battery core module.

7. The end plate structure of a battery module according to claim 6, characterized in that: The connection surface is further provided with two symmetrical second fixing holes, and the second fixing holes are used for installing the pressure strip.

8. The end plate structure of a battery module according to claim 7, characterized in that: The connecting surface is further provided with at least relatively symmetrical third fixing holes, and the third fixing holes are used for installing the plastic seat.

9. The end plate structure of a battery module according to claim 8, characterized in that: A reinforcing rib is connected between the second fixing hole and the third fixing hole.

10. The end plate structure of a battery module according to claim 1, characterized in that: The end plate is a hollow structure.

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