CN111834697A - An air-cooled energy storage module based on square iron lithium battery - Google Patents

Abstract

The invention discloses an air-cooled energy storage module based on a square iron-lithium battery, comprising a hollow sheet metal box body (1); a plurality of partition support beams (2) are arranged on the inner side of the bottom of the sheet metal box body; The tops of the plurality of partition support beams are provided with box partitions (3); the tops of the box partitions are provided with a plurality of longitudinally equally spaced battery modules (5); the box partitions are arranged at any adjacent The opening is provided with a first slot (30) at the position between the two battery modules; the front panel of the sheet metal box is provided with an axial flow fan (10) in the opening; the lower part of the rear panel of the sheet metal box, A horizontally distributed air inlet (101) is opened; the top of the sheet metal box body is provided with a box body upper cover (8). The invention has a scientific structure design, improves the defects such as uneven heat dissipation and unsmooth heat conduction path of the square battery module, effectively solves the problems of poor ventilation inside the energy storage module, uneven temperature of the battery core, etc., and is beneficial to improve the performance and performance of the energy storage module. cycle life.

Description

An air-cooled energy storage module based on square iron lithium battery

technical field

The invention relates to the technical field of batteries, in particular to an air-cooled energy storage module based on a square iron-lithium battery.

Background technique

At present, as the country's coal-dominated energy system transitions to clean energy, intermittent power sources such as wind power and photovoltaics have gradually occupied the main part of the newly added power sources, but the fluctuations on the power generation side are getting bigger and bigger, which brings great difficulties to dispatching. problem.

The energy storage power station can both charge and discharge. It can discharge during the peak of electricity consumption and charge during the valley, which can effectively stabilize the peak-to-valley fluctuations in the power grid. Compared with conventional generator sets, energy storage power stations have obvious advantages in the field of auxiliary services, and can provide peak and frequency regulation, emergency backup, emergency power support and other services for the power grid at millisecond speed.

At the same time, the quick response of the energy storage power station can make up for the randomness and intermittency of renewable energy, which can greatly improve the grid's ability to accept renewable energy, reduce carbon dioxide and sulfur dioxide emissions, improve the overall efficiency of the energy system, and speed up energy Green transformation of production and consumption, and promote the replacement of main energy from fossil energy to renewable energy.

The energy storage module is the core energy storage device of the energy storage power station. At present, most energy storage modules use square iron-lithium batteries as energy units. Based on the structural characteristics of square batteries, square battery modules generally have uneven heat dissipation and unsmooth heat conduction paths. Therefore, the internal ventilation of the energy storage module is poor, and the temperature of the cells is uneven, which in turn affects the performance and cycle life of the energy storage module.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an air-cooled energy storage module based on a square iron-lithium battery in view of the technical defects existing in the prior art.

To this end, the present invention provides an air-cooled energy storage module based on a square iron-lithium battery, comprising a hollow sheet metal box with an open top;

The inner side of the bottom of the sheet metal box is provided with a plurality of longitudinally distributed and laterally spaced partition support beams;

The tops of the plurality of partition support beams are provided with box partitions;

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;

The top of the box partition is provided with a plurality of battery modules distributed at equal intervals in the longitudinal direction (ie, the front and rear directions);

At any position between the two adjacent battery modules of the box partition, the opening is provided with a horizontally distributed first slot;

The front panel of the sheet metal box has an axial flow fan installed in the opening;

The lower part of the rear panel of the sheet metal box is provided with horizontally distributed air inlets;

The top of the sheet metal box is provided with an upper cover of the box.

Wherein, the left and right sides of the battery module and the left and right panels of the sheet metal box respectively have gaps with a preset width.

Among them, the lower part of the inner side of the rear panel of the sheet metal box is provided with a rear windshield of the box;

The rear windshield of the box body is arranged on the top of the rear end of the box body partition;

A rear air circulation cavity with an open bottom is formed between the rear side of the rear windshield of the box and the inner side of the rear panel of the sheet metal box;

On the rear windshield of the box body, the opening is provided with a second horizontally distributed slot;

The second slot is arranged correspondingly to the front and rear of the air inlet.

Wherein, the second slot and the center of the air inlet are located on the same straight line.

Among them, the lower part of the inner side of the front panel of the sheet metal box is provided with a front windshield of the box;

The front air baffle of the box body is arranged on the top of the front end of the box body partition;

The box partition is provided with a first slot at a position between the front windshield of the box and the frontmost battery module.

It can be seen from the above technical solutions provided by the present invention that, compared with the prior art, the present invention provides an air-cooled energy storage module based on a square iron-lithium battery, which has a scientific structure design and improves the heat dissipation of the square battery module. It can effectively solve the problems of poor ventilation inside the energy storage module and uneven temperature of the cell, which is conducive to improving the performance and cycle life of the energy storage module, and has great practical significance in production.

Description of drawings

1 is a three-dimensional exploded exploded view of an air-cooled energy storage module based on a square iron-lithium battery provided by the present invention;

2 is a schematic diagram of an air-cooled energy storage module based on a square iron-lithium battery provided by the present invention, when viewed from the side, the internal air duct is shown, and the arrow shows the flow direction of the air;

In the figure, 1. Sheet metal box; 2. Baffle support beam; 3. Box partition; 4. Windshield at the rear of the box; 5. Battery module;

6. Cell upper bracket; 7. Connecting row; 8. Top cover of box body; 9. Front windshield of box body; 10. Axial flow fan;

11. Positive connector, 12. Negative connector;

30. The first slot, 40, the second slot.

Detailed ways

In order to make the technical means realized by 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 only used to explain the related application, but not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It should be noted that in the description of this application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The terminology of the indicated direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for convenience of description and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation , so it cannot be construed as a limitation on this application.

In addition, it should be noted that, in the description of the present application, unless otherwise expressly specified and limited, the term "installation" and the like should be understood in a broad sense, for example, it may be a fixed installation or a detachable installation.

For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

Referring to FIG. 1 and FIG. 2 , the present invention provides an air-cooled energy storage module based on a square iron-lithium battery, comprising a hollow sheet metal box 1 with an open top;

The inner side of the bottom of the sheet metal box body 1 is provided with a plurality of longitudinally distributed and laterally spaced partition support beams 2;

The tops of the plurality of partition support beams 2 are provided with box partitions 3 ; it should be noted that a bottom air circulation space is formed between the bottom surface of the box partitions 3 and the bottom inner side of the sheet metal box 1 .

The top of the box partition 3 is provided with a plurality of battery modules 5 (not limited to the three battery modules shown in FIG. 1 ) that are equally spaced in the longitudinal direction (ie, the front and rear directions);

At any position between the two adjacent battery modules 5 of the box partition 3, the opening is provided with a horizontally distributed first slot 30;

On the front panel of the sheet metal box 1, an axial flow fan 10 is installed in the opening;

The lower part of the rear panel of the sheet metal box 1 is provided with horizontally distributed air inlets 101;

The top of the sheet metal box 1 is provided with a box upper cover 8, and the two form a relatively sealed box structure (except for the necessary air inlet and outlet structure design, other positions are relatively sealed).

In the present invention, in terms of specific implementation, the left and right sides of the battery module 5 and the left and right panels of the sheet metal box 1 have gaps of preset widths to facilitate air circulation and enhance heat dissipation.

In the present invention, in terms of specific implementation, the lower part of the inner side of the rear panel of the sheet metal box body 1 is provided with a rear windshield 4 of the box body;

The rear windshield 4 of the box body is arranged on the top of the rear end of the box body partition 3;

Between the rear side of the rear windshield 4 of the box body and the inner side of the rear panel of the sheet metal box body 1, an air circulation cavity at the rear of the box body with an open bottom is formed;

On the rear windshield 4 of the box body, the opening is provided with a horizontally distributed second slot 40;

The second slot 40 is disposed correspondingly to the front and rear of the air inlet 101 .

In terms of specific implementation, the second slot 40 and the center of the air inlet 101 are located on the same straight line.

In the present invention, in terms of specific implementation, the lower part of the inner side of the front panel of the sheet metal box body 1 is provided with a box body front wind deflector 9;

The front air baffle 9 of the box body is arranged on the top of the front end of the box body partition 3;

The box partition 3 is provided with a first slot 30 at a position between the front windshield 9 of the box and the frontmost battery module 5 .

In the present invention, in terms of specific implementation, the top of the battery module 5 is provided with a battery upper bracket 6;

The opening on the upper bracket 6 of the battery core is provided with a plurality of connection and discharge inlet holes;

A plurality of connection discharge inlet holes are used for the insertion of connection row 7 .

In the present invention, the front panel of the sheet metal box 1 is provided with a positive connector 11 and a negative connector 12 on the left and right sides of the axial flow fan 10, respectively.

It should be noted that an air-cooled energy storage module based on a square iron-lithium battery provided by the present invention includes a sheet metal box for carrying the battery module, and a plurality of batteries connected in series are arranged in the sheet metal box. The battery module includes a battery cell, wherein a battery core upper bracket is provided on the top of the battery core module, an aluminum bar is used for connection between the battery cells, and a connection copper bar is used between the battery modules.

In the present invention, there is a special air cooling channel designed for the battery module inside the sheet metal box. After the axial flow fan placed on the front panel of the sheet metal box works, the cold air will enter the inside of the box along the channel. , to cool down the battery module.

For the present invention, an exploded schematic diagram of the internal structure of the air-cooled energy storage module is shown in FIG. 1 , and a schematic diagram of the internal air duct of the air-cooled energy storage module is shown in FIG. 2 . The sheet metal box 1 is designed with box partitions 3, which are welded together with the sheet metal box 1 and supported by several partition support beams 2, so that the lower part of the sheet metal box 1 can be constructed. A part of the space (that is, the bottom air circulation space) can be used for the entry and flow of cold air. Several battery modules 5 connected in series are placed on the box separator 3 and arranged in sequence. There is a certain distance between the battery modules in the length direction (ie longitudinal direction) of the sheet metal box, and the box separator 3. A slot structure (first slot 30) is designed at the corresponding position between the battery modules 5, and each first slot is designed in the form of a grid according to the air volume and the wind pressure.

The rear of the sheet metal box 1 is designed with a rear windshield 4 of the box. The rear windshield 4 of the box and the box partition 3 can create a cavity at the rear of the battery module. The air circulation cavity at the rear of the box), the cavity is connected in series with the cavity at the lower part of the sheet metal box 1 (that is, the air circulation space at the bottom), and a second slot is designed on the windshield 4 at the rear of the box. 40. The air baffle 4 at the rear of the box body can be used for the distribution of cold air.

In terms of specific implementation, after the axial flow fan 10 placed on the front panel of the sheet metal box 1 works, the cold air first enters the cavity ( That is, in the air circulation cavity at the rear of the box described above, with the flow of cold air, a part of the air enters the box through the second slot on the rear windshield 4 of the box, which can be used for the last The side of the battery module is cooled, and part of the air will enter the lower cavity of the box (that is, the air circulation space at the bottom), and enter between the battery modules 5 through the first slotted structure on the box partition 3, Thereby cooling the side of the cell. The front part of the sheet metal box body 1 is designed with a front windshield 9 of the box body. The rear large flats flow up to cool the sides of the first mod.

To sum up, compared with the prior art, an air-cooled energy storage module based on a square iron-lithium battery provided by the present invention has a scientific structure design, which improves the uneven heat dissipation of the square battery module and the uneven heat conduction path. It can effectively solve the problems of poor ventilation inside the energy storage module and uneven temperature of the cell, which is conducive to improving the performance and cycle life of the energy storage module, and has great practical significance in production.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (5)

1. An air-cooled energy storage module based on a square iron-lithium battery, characterized in that it comprises an open top, hollow sheet metal box (1); The inner side of the bottom of the sheet metal box body (1) is provided with a plurality of longitudinally distributed and laterally spaced partition support beams (2); The tops of the plurality of partition support beams (2) are provided with box partitions (3); A bottom air circulation space is formed between the bottom surface of the box body partition (3) and the bottom inner side surface of the sheet metal box body (1); The top of the box partition (3) is provided with a plurality of battery modules (5) distributed at equal intervals in the longitudinal direction; At any position between the two adjacent battery modules (5) of the box body partition plate (3), the opening is provided with a first slot (30) distributed horizontally; On the front panel of the sheet metal box (1), an axial flow fan (10) is installed in the opening; The lower part of the rear panel of the sheet metal box (1) is provided with horizontally distributed air inlets (101); The top of the sheet metal box body (1) is provided with a box body upper cover (8). 2. The air-cooled energy storage module based on a square iron-lithium battery according to claim 1, wherein the left and right sides of the battery module (5) are respectively connected with the left and right panels of the sheet metal box (1). , a gap with a preset width. 3. The air-cooled energy storage module based on a square iron-lithium battery according to claim 1, characterized in that, the lower part of the inner side of the rear panel of the sheet metal box (1) is provided with a box rear windshield (1). 4); The rear windshield (4) of the box body is arranged on the top of the rear end of the box body partition plate (3); A rear air circulation cavity with an open bottom is formed between the rear side of the rear windshield (4) of the box body and the inner side of the rear panel of the sheet metal box body (1); On the rear windshield (4) of the box body, the opening is provided with a second transversely distributed slot (40); The second slot (40) is arranged corresponding to the front and rear of the air inlet (101). 4. The air-cooled energy storage module based on a square iron-lithium battery according to claim 3, wherein the second slot (40) and the center of the air inlet (101) are located on the same straight line. 5. The air-cooled energy storage module based on a square iron-lithium battery according to any one of claims 1 to 4, characterized in that, a box body is provided at the lower part of the inner side of the front panel of the sheet metal box body (1). Front windshield (9); The front air baffle (9) of the box body is arranged on the top of the front end of the box body partition plate (3); The box partition (3) is provided with a first slot (30) at the position between the front windshield (9) of the box and the frontmost battery module (5).

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