Aluminum profile end plate for square shell battery cell large module

Abstract

The utility model relates to the technical field of new energy battery end plates, in particular to an aluminum profile end plate for a square shell battery cell large module, which comprises an aluminum profile end plate main body, the section of the aluminum profile end plate main body is of a T-shaped structure, and the section of the aluminum profile end plate main body is formed by extrusion processing. Reinforcing ribs are symmetrically arranged at the two ends of the aluminum profile end plate body, a low-voltage sampling base installation groove and a high-voltage output electrode base installation groove are formed in the front face of the aluminum profile end plate body, and a weight reduction groove is further formed in the front face of the aluminum profile end plate body. The aluminum profile end plate body is further provided with a module hoisting hole, a voltage and temperature sampling wire harness binding belt fixing hole and a middle partition plate installation welding groove in a penetrating mode. The aluminum profile end plate for the large module of the square-shell battery cell is extruded in the width direction of the slender square-shell battery cell from the small-size direction, so that the difficulty degree of the extrusion process is greatly reduced, and the problem that the product quality is influenced by the out-of-tolerance size and poor planeness caused by extrusion from the length direction is avoided.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery end plate technology, specifically an aluminum profile end plate for a large square-shell battery cell module. Background Technology

[0002] Driving range has always been a key focus in the new energy vehicle market, and a crucial indicator for measuring driving range is energy density. Higher energy density means that, with the same volume utilization of the vehicle, the power battery can store more energy, resulting in a longer driving range. CTP (Cell-to-Pack) technology is a method to improve energy density through structural design, encompassing two approaches: large-module design and module-less design. The module-less approach utilizes thermally conductive structural adhesives and the relatively slender structure of the prismatic cells to enhance the structural strength of the power battery module, reducing the number of internal structural components. However, in the aftermarket, when a single cell fails, the module-less approach requires the entire power battery pack to be replaced, resulting in high after-sales costs. In contrast, the large-module approach only requires replacing the corresponding module when a single cell fails, leading to relatively lower after-sales costs.

[0003] Currently, the square-shell battery cell products on the market are all similar to the "blade" structure design, that is, the large surface of the battery cell is rectangular, and the length of the double-panel large module design reaches 500-700mm. The end plate is one of the important structural components in the large module solution, and it is generally adopted by extrusion or casting process. Among them, the tonnage of the extrusion process equipment can only meet the extrusion of the profile section with a length of 400mm, that is, under the premise of ensuring that the dimensional tolerance and geometric tolerance of the profile meet the product requirements.

[0004] Therefore, if a large modular design is adopted, given the widespread use of slender rectangular battery cells in the current market, it is of paramount importance to rationally utilize the extrusion process to design end plates that meet the requirements of module use. Utility Model Content

[0005] The purpose of this utility model is to provide an aluminum profile end plate for a large square-shell battery cell module, in order to solve the problem mentioned in the background art that the tonnage of the extrusion process equipment for the end plate of the large square-shell battery cell module on the market can only meet the extrusion of a profile section of 400mm in length, while the length of the end plate reaches 500-700mm, resulting in the profile dimensional tolerance and geometric tolerance not meeting the product requirements, thus affecting the production quality of the end plate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an aluminum profile end plate for a large square-shell battery cell module, comprising an aluminum profile end plate body, wherein the cross-section of the aluminum profile end plate body is a T-shaped structure, and the aluminum profile end plate body is formed by extrusion at the cross-section; the aluminum profile end plate body is symmetrically provided with reinforcing ribs at both ends; the front of the aluminum profile end plate body is provided with a low-voltage sampling base mounting groove and a high-voltage output electrode mounting groove; and a weight reduction groove is also provided on the front of the aluminum profile end plate body; the aluminum profile end plate body is also provided with a module hoisting hole, a voltage and temperature sampling wire harness cable tie fixing hole, and a middle partition plate mounting welding groove.

[0007] Preferably, the flat surface of the aluminum profile end plate is located in the expansion direction of the square battery cell thickness.

[0008] Preferably, the low-pressure sampling base mounting groove and the high-pressure output electrode mounting groove are located at the upper end of the raised surface of the aluminum profile end plate.

[0009] Preferably, all the reinforcing ribs are integral structures, extruded and formed, and are connected to the main body of the aluminum profile end plate.

[0010] Preferably, the weight-reducing groove is a long strip structure and is located below the module hoisting hole.

[0011] Preferably, the depth of the weight-reducing groove is less than the depth of the protruding part of the main body of the aluminum profile end plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The aluminum profile end plate used in the large module of the square-shell battery cell is extruded in the width direction of the slender square-shell battery cell. Extruding from the small size direction greatly reduces the difficulty of the extrusion process and avoids the problems of dimensional deviation and poor flatness caused by extrusion from the length direction, which affect product quality.

[0014] 2. The aluminum profile end plate used in the large square-shell battery cell module has a "T"-shaped structure, with the large surface conforming to the expansion direction of the entire square-shell battery cell thickness. This can effectively prevent the wear of the blue film of the square-shell battery cell under long-term vibration environment, thereby reducing the insulation failure rate. Reinforcing ribs are set in the horizontal position, which takes into account both the strength to resist the expansion force of the module and the CNC difficulty of the module bolt mounting holes.

[0015] 3. The aluminum profile end plate used in this square-shell battery cell large module is extruded from the width direction, which greatly improves the profile qualification rate and reduces the waste of aluminum metal. At the same time, the "T"-shaped structure design of the end plate has high structural strength and also reduces the probability of damage to the blue film of the battery cell under long-term complex working conditions. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the front of an aluminum profile end plate for a large square-shell battery cell module according to the present invention.

[0017] Figure 2 This is a side view of the aluminum profile end plate structure for a large square-shell battery cell module according to this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the back of an aluminum profile end plate for a large square-shell battery cell module according to this utility model.

[0019] Figure 4 This is a front view of an aluminum profile end plate for a large square-shell battery cell module according to this utility model.

[0020] Figure 5 This is a rear view of an aluminum profile end plate for a large square-shell battery cell module according to this utility model.

[0021] In the diagram: 1. Aluminum profile end plate body; 2. Low-voltage sampling base mounting groove; 3. High-voltage output electrode base mounting groove; 4. Reinforcing rib; 5. Module hoisting hole; 6. Voltage and temperature sampling harness cable tie fixing hole; 7. Middle partition plate mounting welding groove; 8. Weight reduction groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5This utility model provides a technical solution: an aluminum profile end plate for a large module of square-shell battery cells, including an aluminum profile end plate body 1. The cross-section of the aluminum profile end plate body 1 is a "T"-shaped structure, and the aluminum profile end plate body 1 is extruded and formed from the cross-section. The large, flat side surface of the aluminum profile end plate body 1 is located in the expansion direction of the square-shell battery cell thickness. This structure allows the aluminum profile end plate body 1 to be fixed by the large surface end-fitting structure, so that the expansion of the square-shell battery cell thickness can be evenly transmitted through the aluminum profile end plate body 1, thereby effectively preventing the blue film of the square-shell battery cell from... Wear under long-term vibration environment reduces insulation failure rate. The aluminum profile end plate body 1 has symmetrical reinforcing ribs 4 at both ends. These ribs 4 are integral structures, extruded and formed. The extruded reinforcing ribs 4 have no bevel, as bevel is unfavorable for CNC machining. The reinforcing ribs 4 are connected to the aluminum profile end plate body 1. This structure allows the reinforcing ribs 4 to be horizontally positioned at both ends of the aluminum profile end plate body 1, considering both the strength to resist module expansion force and the ease of CNC machining of module bolt mounting holes, thus facilitating the machining of the aluminum profile end plate body 1. Furthermore, the front of the aluminum profile end plate body 1 is... The aluminum profile end plate body 1 is equipped with a low-voltage sampling base mounting slot 2 and a high-voltage output electrode mounting slot 3. These slots are located at the upper end of the raised surface of the aluminum profile end plate body 1. This structure provides sufficient installation space for the low-voltage sampling base and the high-voltage output electrode base, ensuring structural reliability. Furthermore, the aluminum profile end plate body 1 also has a weight-reducing groove 8 on its front side. This groove is elongated and located below the module lifting hole 5. This structure assists in the lifting function of the module lifting hole 5. Yes, it facilitates the handling and assembly of the aluminum profile end plate body 1. The aluminum profile end plate body 1 is also provided with a module hoisting hole 5, a voltage and temperature sampling harness cable tie fixing hole 6, and a partition plate mounting welding groove 7. The voltage and temperature sampling harness cable tie fixing hole 6 is used for positioning the voltage and temperature sampling harness, and the partition plate mounting welding groove 7 is used for mounting and positioning the partition plate. The depth of the weight reduction groove 8 is less than the depth of the protruding part of the aluminum profile end plate body 1. This structure can reduce the weight of the aluminum profile end plate body 1 through the weight reduction groove 8, realizing a lightweight design.

[0024] Working principle: When using the aluminum profile end plate for this large square-shell battery cell module, the main body 1 of the aluminum profile end plate is first extruded from the smaller end of the T-shaped section. After being cut to the required length, reinforcing ribs 4 are welded to both ends of the main body 1 to increase its strength against the expansion force of the module. The flat surface of the main body 1 conforms to the expansion direction of the entire square-shell battery cell thickness. The T-shaped structure of the main body 1 effectively prevents the blue film of the square-shell battery cell from being damaged by long-term vibration. Wear and tear are reduced to decrease the insulation failure rate. Then, the aluminum profile end plate body 1 is further processed. Low-voltage sampling base mounting groove 2 and high-voltage output electrode mounting groove 3 are opened on the upper end of the raised surface of the aluminum profile end plate body 1 as needed. Then, module hoisting hole 5, voltage and temperature sampling harness cable tie fixing hole 6 and middle partition plate mounting welding groove 7 are opened on the aluminum profile end plate body 1. Then, weight reduction groove 8 is opened on the front of the aluminum profile end plate body 1. At the same time, weight reduction groove 8 facilitates the handling and processing of the aluminum profile end plate body 1 during assembly, thus completing a series of tasks.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An aluminum profile end plate for a square cell large module, comprising an aluminum profile end plate main body (1), characterized in that: The cross section of the aluminum profile end plate body (1) is a "T" shape structure, and the aluminum profile end plate body (1) is formed by extrusion processing at the cross section, the aluminum profile end plate body (1) is symmetrically provided with reinforcing ribs (4) at both ends, and the aluminum profile end plate body (1) is provided with a low-voltage sampling base mounting groove (2) and a high-voltage output pole base mounting groove (3) on the front surface, and the aluminum profile end plate body (1) is also provided with a weight reduction groove (8) on the front surface, and the aluminum profile end plate body (1) is also provided with a module hoisting hole (5), a voltage temperature sampling wire harness fixing hole (6) and a partition plate mounting and welding groove (7).

2. The aluminum profile end plate for square cell large module according to claim 1, characterized in that: The flat side of the aluminum profile end plate body (1) is located in the expansion direction of the thickness of the square shell battery cell.

3. The aluminum profile end plate for square can cell large module according to claim 1, characterized in that: The low-voltage sampling base mounting groove (2) and the high-voltage output pole base mounting groove (3) are arranged at the upper end position of the protruding surface of the aluminum profile end plate body (1).

4. The aluminum profile end plate for square cell large module according to claim 1, characterized in that: The reinforcing ribs (4) are integrally formed and extruded, and the reinforcing ribs (4) are connected with the aluminum profile end plate body (1).

5. The aluminum profile end plate for square cell large module according to claim 1, characterized in that: The weight reduction groove (8) is a long strip structure, and the weight reduction groove (8) is arranged below the module hoisting hole (5).

6. The aluminum profile end plate for square cell large module according to claim 1, characterized in that: The depth of the weight reduction groove (8) is less than the depth of the protruding part of the aluminum profile end plate body (1).

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