A square iron lithium battery-based air-cooled energy storage module

Abstract

The application discloses a square lithium-iron battery-based air-cooled energy storage module, which comprises a hollow sheet metal box body (1); a plurality of partition plate support beams (2) are arranged on the inner side of the bottom of the sheet metal box body; a box partition plate (3) is arranged on the top of the plurality of partition plate support beams; a plurality of longitudinally equidistantly distributed battery modules (5) are arranged on the top of the box partition plate; a first slot (30) is arranged at the position between any two adjacent battery modules; an axial flow fan (10) is arranged on the front panel of the sheet metal box body; a transversely distributed air inlet (101) is arranged on the lower part of the rear panel of the sheet metal box body; and a box upper cover (8) is arranged on the top of the sheet metal box body. The application has the advantages of scientific structure design, improvement of the defects of uneven heat dissipation of the square battery module and inharmonious heat conduction path, effective solution to the problems of poor ventilation and uneven temperature of the battery core in the energy storage module, and facilitation of the improvement of the use performance and the cycle life of the energy storage module.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to an air-cooled energy storage module based on a square lithium iron phosphate battery. Background Technology

[0002] Currently, as the country's energy system, which is mainly based on coal, transitions to clean energy, intermittent power sources such as wind power and solar power are gradually taking up the majority of new power sources. However, the fluctuations on the power generation side are becoming increasingly large, which poses challenges to dispatching.

[0003] Energy storage power stations can both charge and discharge, discharging during peak electricity demand and charging during off-peak hours, effectively smoothing out peak-valley fluctuations in the power grid. Energy storage power stations offer rapid response times, and compared to conventional generator sets, they have significant advantages in ancillary services, providing the power grid with various services such as peak shaving and frequency regulation, emergency backup, and emergency power support at millisecond speeds.

[0004] Meanwhile, the rapid response of energy storage power stations can compensate for the randomness and intermittency of renewable energy, significantly improve the grid's ability to accept renewable energy, reduce carbon dioxide and sulfur dioxide emissions, improve the overall efficiency of the energy system, accelerate the green transformation of energy production and consumption, and promote the replacement of the main energy source with fossil energy.

[0005] Energy storage modules are the core energy storage devices of energy storage power stations. Currently, most energy storage modules use square lithium iron phosphate batteries as energy units. Due to the structural characteristics of square batteries, square battery modules generally have defects such as uneven heat dissipation and poor heat conduction paths, which leads to problems such as poor internal ventilation and uneven cell temperature, thus affecting the performance and cycle life of the energy storage module. Summary of the Invention

[0006] The purpose of this invention is to address the technical deficiencies of existing technologies by providing an air-cooled energy storage module based on square lithium iron phosphate batteries.

[0007] Therefore, the present invention provides an air-cooled energy storage module based on a square lithium iron phosphate battery, comprising a hollow sheet metal box with an open top.

[0008] The bottom inner side of the sheet metal box is provided with multiple longitudinally distributed and laterally spaced partition support beams;

[0009] The top of the multiple partition support beams is equipped with box-type partitions;

[0010] A bottom air circulation space is formed between the bottom surface of the box partition and the bottom inner side of the sheet metal box;

[0011] The top of the enclosure panel has multiple battery modules that are evenly spaced longitudinally (i.e., in the front-to-back direction).

[0012] The enclosure partition has a first slot that is horizontally distributed at the position between any two adjacent battery modules.

[0013] The front panel of the sheet metal enclosure has an opening for mounting an axial flow fan.

[0014] The lower part of the rear panel of the sheet metal enclosure has horizontally distributed air inlets;

[0015] The top of the sheet metal enclosure is equipped with an enclosure cover.

[0016] The battery module has a pre-set gap between its left and right sides and the left and right panels of the sheet metal housing.

[0017] Among them, a rear wind deflector is provided on the lower inner side of the rear panel of the sheet metal box;

[0018] The rear wind deflector of the box is located at the top of the rear end of the box partition;

[0019] The rear side of the rear wind deflector of the box and the inner side of the rear panel of the sheet metal box form an open-bottom air circulation cavity at the rear of the box.

[0020] On the rear wind deflector of the box, there is a second horizontally distributed slot in the opening;

[0021] The second slot is set corresponding to the front and rear of the air inlet.

[0022] The center of the second slot and the air inlet are on the same straight line.

[0023] Among them, a front wind deflector is provided on the lower inner side of the front panel of the sheet metal box;

[0024] The front wind deflector of the enclosure is located at the top front end of the enclosure partition;

[0025] The enclosure partition has a first slot located between the front windshield and the frontmost battery module.

[0026] As can be seen from the technical solution provided by the present invention above, compared with the prior art, the present invention provides a wind-cooled energy storage module based on square lithium iron phosphate batteries. Its structure is scientifically designed, which improves the defects of uneven heat dissipation and poor heat conduction path of square battery modules, and effectively solves the problems of poor ventilation and uneven cell temperature inside the energy storage module. It is conducive to improving the performance and cycle life of the energy storage module and has significant practical significance for production. Attached Figure Description

[0027] Figure 1 An exploded three-dimensional view of a wind-cooled energy storage module based on a square lithium iron phosphate battery, provided for this invention.

[0028] Figure 2 The schematic diagram of the internal airflow channel of a wind-cooled energy storage module based on a square lithium iron phosphate battery provided by the present invention is shown from the side. The arrows indicate the direction of airflow.

[0029] In the diagram, 1. Sheet metal enclosure; 2. Partition support beam; 3. Enclosure partition; 4. Rear wind deflector of the enclosure; 5. Battery module;

[0030] 6. Battery cell upper bracket; 7. Connecting bar; 8. Box top cover; 9. Front wind baffle of the box; 10. Axial flow fan;

[0031] 11. Positive connector; 12. Negative connector;

[0032] 30. First slot; 40. Second slot. Detailed Implementation

[0033] To make the technical means of implementing the present invention easier to understand, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant application and not intended to limit the application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that in the description of this application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0036] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the term "installation" should be interpreted broadly, for example, it can refer to fixed installation or detachable installation.

[0037] Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] See Figure 1 , Figure 2 The present invention provides an air-cooled energy storage module based on a square lithium iron phosphate battery, comprising a hollow sheet metal box 1 with an open top;

[0039] On the inner bottom of the sheet metal box 1, there are multiple longitudinally distributed and laterally spaced partition support beams 2.

[0040] The top of the multiple partition support beams 2 is provided with a box partition 3; it should be noted that a bottom air circulation space is formed between the bottom surface of the box partition 3 and the bottom inner side of the sheet metal box 1.

[0041] On the top of the enclosure partition 3, multiple battery modules 5 (not limited to) are arranged at equal intervals in the longitudinal direction (i.e., the front-to-back direction). Figure 1 (The three battery modules shown);

[0042] The enclosure partition 3 has a first slot 30 that is horizontally distributed at the position between any two adjacent battery modules 5;

[0043] The front panel of the sheet metal housing 1 has an opening for mounting an axial flow fan 10;

[0044] The lower part of the rear panel of the sheet metal housing 1 has horizontally distributed air inlets 101.

[0045] The top of the sheet metal enclosure 1 is provided with an enclosure cover 8, which together form a relatively sealed enclosure structure (except for the necessary air inlet and outlet structure design, other positions are relatively sealed).

[0046] In this invention, specifically, the left and right sides of the battery module 5 are respectively separated from the left and right panels of the sheet metal housing 1 by a predetermined width to facilitate air circulation and enhance heat dissipation.

[0047] In this invention, specifically, a rear wind deflector 4 is provided on the lower inner side of the rear panel of the sheet metal box 1.

[0048] The rear wind deflector 4 of the box is located at the top of the rear end of the box partition 3;

[0049] The rear side of the rear wind deflector 4 of the box body forms an open-bottom rear air circulation cavity between the rear side of the sheet metal box body 1 and the inner side of the rear panel.

[0050] On the rear wind deflector 4 of the box body, there is a second slot 40 that is distributed horizontally.

[0051] The second slot 40 is set in a corresponding manner to the air inlet 101.

[0052] In practice, the center of the second slot 40 and the air inlet 101 are on the same straight line.

[0053] In this invention, specifically, a front wind deflector 9 is provided on the lower inner side of the front panel of the sheet metal housing 1.

[0054] The front wind deflector 9 of the box is located at the top front end of the box partition 3;

[0055] The enclosure partition 3 has a first slot 30 located between the front windshield 9 and the frontmost battery module 5.

[0056] In this invention, specifically, a cell support bracket 6 is provided on the top of the battery module 5;

[0057] The upper bracket 6 of the battery cell has multiple connection and discharge holes.

[0058] Multiple connectors are inserted into the inlet holes for inserting connector 7.

[0059] In this invention, specifically, on the front panel of the sheet metal housing 1, a positive connector 11 and a negative connector 12 are respectively provided on the left and right sides of the axial flow fan 10.

[0060] It should be noted that the air-cooled energy storage module based on square lithium iron phosphate batteries provided by the present invention includes a sheet metal housing for carrying the battery modules. Several battery modules connected in series are arranged inside the sheet metal housing. Each battery module includes a cell. A cell support is provided on the top of the cell module. Aluminum busbars are used to connect the cells, and copper busbars are used to connect the battery modules.

[0061] In this invention, the sheet metal housing has a dedicated air-cooling channel designed for the battery module. After the axial flow fan placed on the front panel of the sheet metal housing is working, cold air will enter the housing along the channel to cool down the battery module.

[0062] For this invention, an exploded view of the internal structure of the air-cooled energy storage module is shown below. Figure 1 As shown in the diagram, the internal air duct of the air-cooled energy storage module is as follows: Figure 2 As shown. The sheet metal housing 1 has an internal partition 3, which is welded to the sheet metal housing 1 and supported by several partition support beams 2. This creates a space at the bottom of the sheet metal housing 1 (i.e., a bottom air circulation space) for the entry and flow of cold air. Several interconnected battery modules 5 are placed on the partition 3 and arranged sequentially. There is a certain distance between the battery modules in the length direction (i.e., longitudinal direction) of the sheet metal housing. At the same time, the partition 3 has a slotted structure (first slot 30) at the corresponding positions between the battery modules 5, and each first slot is designed as a grid according to the air volume and air pressure.

[0063] The rear of the sheet metal housing 1 is designed with a rear baffle 4. The rear baffle 4 and the housing partition 3 can create a cavity at the rear of the battery module (i.e., the air circulation cavity at the rear of the housing mentioned above). This cavity is connected in series with the cavity at the bottom of the sheet metal housing 1 (i.e., the bottom air circulation space). At the same time, the rear baffle 4 is designed with a second slot 40, which can be used for cold air diversion.

[0064] In practice, after the axial flow fan 10, located on the front panel of the sheet metal housing 1, starts working, cold air first enters the rear cavity of the sheet metal housing 1 (i.e., the rear airflow cavity of the housing mentioned above) from the air inlet 101 at the lower rear of the sheet metal housing 1. As the cold air flows, some air enters the housing through the second slot on the rear baffle 4, which cools the side of the last battery module. Some air enters the lower cavity of the housing (i.e., the bottom airflow space) and enters between the battery modules 5 through the first slot structure on the housing partition 3, thereby cooling the side of the battery cells. The front of the sheet metal housing 1 is designed with a front baffle 9. After the cold air enters the housing through the first slot at the front of the housing, it can flow upward along the large rear surface of the front baffle 9 to cool the side of the first module.

[0065] In summary, compared with the prior art, the air-cooled energy storage module based on square lithium iron phosphate batteries provided by this invention has a scientific structural design. It improves the defects of uneven heat dissipation and obstructed heat conduction paths in square battery modules, thereby effectively solving problems such as poor ventilation and uneven cell temperature inside the energy storage module. This is beneficial to improving the performance and cycle life of the energy storage module and has significant practical significance for production.

[0066] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A wind-cooled energy storage module based on a square lithium iron phosphate battery, characterized in that, Includes a hollow sheet metal box with an open top (1); On the inner bottom of the sheet metal box (1), there are multiple longitudinally distributed and laterally spaced partition support beams (2); The top of the multiple partition support beams (2) is provided with box-type partitions (3); A bottom air circulation space is formed between the bottom surface of the box partition (3) and the bottom inner side of the sheet metal box (1); On the top of the box partition (3), there are multiple battery modules (5) arranged longitudinally at equal intervals; The box partition (3) has a first slot (30) that is horizontally distributed between any two adjacent battery modules (5); The front panel of the sheet metal housing (1) has an opening for mounting an axial flow fan (10); The lower part of the rear panel of the sheet metal enclosure (1) has horizontally distributed air inlets (101); The top of the sheet metal box (1) is provided with a box cover (8); A front wind deflector (9) is provided on the lower inner side of the front panel of the sheet metal box (1); The front wind deflector (9) of the box is located at the top front end of the box partition (3); The partition plate (3) of the box is provided with a first slot (30) between the front wind baffle (9) of the box and the frontmost battery module (5); after the cold air enters the interior of the sheet metal box (1) through the first slot (30) at the frontmost part of the sheet metal box (1), it flows upward along the rear side plane of the front wind baffle (9) of the box to cool the side of the first battery module (5); Among them, a cavity is formed between the front wind baffle (9) of the box body and the inner side of the front panel of the sheet metal box body (1); A rear wind deflector (4) is provided on the lower inner side of the rear panel of the sheet metal box (1); The rear wind deflector (4) of the box is located at the top of the rear end of the box partition (3); The rear side of the rear wind deflector (4) of the box body forms an air circulation cavity at the rear of the box body that is open at the bottom and closed at the top between the rear side of the sheet metal box body (1) and the inner side of the rear panel. On the rear wind deflector (4) of the box body, there is a second slot (40) distributed horizontally. The second slot (40) is set in front of and behind the air inlet (101); The cold air entering the sheet metal box (1) through the air inlet (101) first enters the air circulation cavity at the rear of the box. A portion of the cold air enters the interior of the sheet metal box (1) through the second slot (40) to cool the side of the last battery module (5). Another portion of the cold air enters the bottom air circulation space and enters between the battery modules (5) through the first slot (30) to cool the side of the battery cell.

2. The air-cooled energy storage module based on a square lithium iron phosphate battery as described in claim 1, characterized in that, There is a pre-defined gap between the left and right sides of the battery module (5) and the left and right panels of the sheet metal housing (1).

3. The air-cooled energy storage module based on a square lithium iron phosphate battery as described in claim 1, characterized in that, The center of the second slot (40) and the air inlet (101) are on the same straight line.

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