CN211350906U - Energy storage battery insert box and its energy storage system - Google Patents

Abstract

The utility model relates to the technical field of lithium battery manufacturing, and in particular discloses an energy storage battery insertion box and an energy storage system thereof. The energy storage battery insertion box comprises a base and a plurality of rows of battery cells fixed on the base. The battery pack includes a plurality of battery cells arranged at equal intervals, and heat dissipation fins are arranged between adjacent battery cells; the energy storage battery insert box is provided with an inlet and an outlet for cooling air for heat dissipation, and the battery core group close to the inlet is provided with The total heat dissipation area of the heat dissipation fins is smaller than the total heat dissipation area of the heat dissipation fins in the battery core group close to the outlet. The utility model adjusts the total heat dissipation area of the heat dissipation fins in the battery core groups located at different positions in the energy storage battery insertion box, so that the battery cores at different positions can obtain the same heat dissipation effect, and finally the battery core temperature can be compared. uniform.

Description

Energy storage battery insert box and its energy storage system

technical field

The utility model relates to the technical field of lithium battery manufacturing, in particular to an energy storage battery insert box and an energy storage system thereof.

Background technique

The energy storage system is a new energy device that stores a large number of energy storage lithium batteries in containers or cabinets to perform functions such as peak shaving and valley filling, frequency modulation, etc. It has the advantages of easy installation, easy transportation, and modularization. The energy storage battery box is a mechanism used to fix a large number of lithium batteries in the energy storage system. Since it is used for the centralized storage of a large number of energy storage lithium batteries, the heat dissipation performance of the energy storage battery box will be directly It affects the performance of the lithium battery, that is to say, the temperature difference of the energy storage battery box has a great influence on the temperature difference of the entire energy storage system. Existing energy storage battery insert boxes are generally air-cooled for heat dissipation, and air ducts with the same cell spacing are usually set in the energy storage battery insert boxes. For the air ducts with the same spacing, the air temperature of the cold air flowing to the front row is lower, which can play a good role in heat dissipation. The temperature of the battery cells in the front and rear rows is greatly different, resulting in a higher temperature of the battery cells in the rear row due to the reduction of heat dissipation, and even local overheating. Therefore, the existing air ducts cannot make each cell dissipate evenly, resulting in uneven temperature rise of the cells, worsening the consistency of the cells, and shortening the cycle life of the cells and the energy storage system.

Utility model content

The purpose of this utility model is to overcome the problem of poor heat dissipation effect of equal-spaced air ducts in the prior art, and to provide an energy storage battery insert box and an energy storage system thereof. The total heat dissipation area of the heat dissipation fins in the middle, so that the cells in different positions can obtain the same heat dissipation effect, and finally the temperature of the cells can be relatively uniform.

In order to achieve the above purpose, one aspect of the present invention provides an energy storage battery insertion box, which includes a base and multiple rows of battery packs fixed on the base, and each row of the battery packs includes a plurality of equidistantly spaced battery packs. There are heat dissipation fins between adjacent battery cells; the energy storage battery insert box is provided with an inlet and an outlet for cooling air for heat dissipation, and the battery cells in the battery pack close to the inlet are provided with The total heat dissipation area of the heat dissipation fins is smaller than the total heat dissipation area of the heat dissipation fins in the battery cell group close to the outlet.

Preferably, all the heat dissipation fins arranged in the energy storage battery insert box have the same sheet area, and the number of the heat dissipation fins close to the inlet is less than the number of the heat dissipation fins close to the outlet The number of ribs to set.

Preferably, along a direction from approaching the inlet to approaching the outlet, the number of the heat dissipation fins is sequentially increased.

Preferably, the set number of the battery cells is three rows, and the direction from the inlet to the outlet is a first row, a second row and a third row, the first row, the second row and the The number of the heat dissipation fins disposed between the battery cells in the third row is 2, 3 and 4 in sequence.

Preferably, the number of the heat dissipation fins disposed between the cells of each row of the battery cell group in the energy storage battery insert box is equal, and the number of the heat dissipation fins close to the inlet is the same. The fin area is smaller than the fin area of the heat dissipation fins near the outlet.

Preferably, in a direction from approaching the inlet to approaching the outlet, the area of the fins of the heat dissipation fins increases sequentially.

Preferably, the area of the fins near the inlet is 1/3-1/2 of the area of the fins near the outlet.

Preferably, the arrangement direction of the body of the heat dissipation fins is perpendicular to the direction in which the side walls of the battery cells are located.

Preferably, the number of the heat dissipation fins provided between the adjacent battery cells is multiple.

A second aspect of the present utility model provides an energy storage system, which includes a box body and a battery insertion box bracket disposed in the box body, and the above-mentioned energy storage battery insertion box is fixed on the battery box insertion bracket.

Through the above technical solutions, the present invention adjusts the total heat dissipation area of the heat dissipation fins in the battery cell groups located at different positions in the energy storage battery insertion box, so that the cells located in different positions can obtain the same heat dissipation effect, and finally the heat dissipation effect is achieved. The cell temperature can be relatively uniform.

Description of drawings

Fig. 1 is a top-view structural schematic diagram of an energy storage battery insertion box according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the A-direction structure of each row of cell groups in FIG. 1 ;

FIG. 3 is a top-view structural schematic diagram of an energy storage battery insert box according to Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of the A-direction structure of each row of cell groups in FIG. 3 .

Description of reference numerals

First row 001 Second row 002 Third row 003 Base 100 Inlet 110 Outlet 120 Cell group 200 Cell 210 Cooling fin 220 Air duct 230

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

In the present utility model, unless otherwise stated, the directional words used such as "up, down, left and right" usually refer to the up, down, left and right as shown in the accompanying drawings; "inside, outside" "Usually refers to the inside and outside relative to the contour of each component itself; "far, near" generally refers to the far and near relative to the contour of each component itself.

Example 1

As shown in FIG. 1 and in conjunction with FIG. 2 , the present invention provides an energy storage battery insertion box, which includes a base 100 and multiple rows of battery packs 200 fixed on the base 100 , and each row of the battery packs 200 includes A plurality of battery cells 210 are arranged at equal intervals, and heat dissipation fins 220 are arranged between the adjacent battery cells 210; the energy storage battery insert box is provided with an inlet 110 and an outlet 120 for cooling air for heat dissipation, The total heat dissipation area of the heat dissipation fins 220 in the cell group 200 near the inlet 110 is smaller than the total heat dissipation area of the heat dissipation fins 220 in the cell group 200 near the outlet 120 . That is to say, the present invention adjusts the total heat dissipation area of the heat dissipation fins in the battery cell groups located at different positions in the energy storage battery insert box, so that the cells located in different positions can obtain the same heat dissipation effect, and finally the power cells can obtain the same heat dissipation effect. The core temperature can be relatively uniform.

In order to achieve the above effect, the fin body area of the heat dissipation fins at all positions can be set to be the same, and the number of heat dissipation fins at different positions can be adjusted; Adjust the sheet area of the cooling fins at different positions. In addition, in order to facilitate the formation of air ducts for cooling air to flow between the heat dissipation fins 220 and between the heat dissipation fins 220 and the side walls of the battery cells 210 in the direction, in general, the fins of the heat dissipation fins 220 are The arrangement direction of the body and the direction of the side wall of the battery cell 210 are perpendicular to each other. When the number of the heat dissipation fins 220 disposed between the adjacent cells 210 is multiple, the positional relationship between the fins of the multiple heat dissipation fins 220 may be based on the size of the installation space and the heat dissipation requirements For example, in order to save space or arrange neatly, the fins of the plurality of cooling fins 220 may be parallel to each other. Of course, the above is the setting method of the heat dissipation fins 220 under normal circumstances. Obviously, the heat dissipation fins 220 can also be set to form an angle structure with the direction of the side wall of the battery cell 210, which belongs to the present invention. protected range. The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

In the embodiment shown in FIG. 1 , three rows of battery cell groups 200 are provided on the base 100 , and along the direction from near the inlet 110 to near the outlet 120 , the first row 001 , the second row 002 and the third row 001 are included in sequence. Row 003. It can be seen from FIG. 1 that all the heat dissipation fins 220 arranged in the first row 001 , the second row 002 and the third row 003 have the same area. In the first row 001, the number of the heat dissipation fins 220 is 2, and in the second row 002 and the third row 003 arranged in sequence, the number of the heat dissipation fins 220 is 3 and 4. Obviously, The number of fins 220 disposed near the inlet 110 is less than the number of fins 220 disposed near the outlet 120 . In the present invention, different numbers of heat dissipation fins 220 are respectively arranged between two adjacent battery cells 210 in each row of cell groups 200 through the above-mentioned structural arrangement. An air duct 230 is formed between the sheet 220 and the direction of the side wall of the battery cell 210. The fan or air conditioner arranged in the energy storage battery insert box sends the cooling air from the inlet 110, and flows through the air duct 230. The interior of the energy storage battery insert box. Due to the different numbers of the cooling fins 220 in different rows, the total heat exchange area between the cooling air flowing through and the cooling fins 220 is different. The cooling fins between the cells 210 in the first row 001 are different. The number of 220 is small, and the cooling air flows in from the middle of the cooling fins, first through the first row 001, so the heat exchange area with the air is small; The number of the heat dissipation fins 220 is gradually increased, so the heat exchange area with the air is also larger and larger, and the contact area between the front row cell group and the cooling air is reduced, so the heat dissipation of the front row cell group is reduced, so that the temperature of the front row cell group is relatively small. The battery pack in the rear row has a large contact area with the cooling air, so that the temperature is relatively low. Finally, the cooling capacity of the cooling air output from the fan or air conditioner is sent to each cell of the energy storage battery box in an equal amount. In the above, it is guaranteed that each cell in each position can obtain the same cooling capacity. Through the simulation and analysis method, it can be known that the utility model can realize the temperature difference between different cells in each position in the energy storage battery insert box < 1°C, which effectively ensures that the temperature of each cell in the energy storage battery box can achieve good uniformity, so that the cell can obtain a good cycle life.

It can be seen from the above content that, in this embodiment, along the direction from the inlet 110 to the outlet 120 , the number of the heat dissipation fins 220 is sequentially increased. It should be noted that, in practical applications, the law of changing the number of the heat dissipation fins 220 can be selected according to actual needs. The number can be increased or sequentially increased, as long as the effect that the total heat dissipation area of the heat dissipation fins 220 near the inlet 110 is smaller than the total heat dissipation area of the heat dissipation fins 220 near the outlet 110 can be achieved, namely Can.

Embodiment 2

In the embodiment shown in FIG. 3 and in conjunction with FIG. 4 , the heat dissipation fins 220 disposed between the cells 210 of each row of the cell group 200 in the energy storage battery insert box The numbers are all equal, and the fins 220 arranged in the first row 001, the second row 002 and the third row 003 are all 2 pieces, but the area of the fins 220 close to the inlet 110 is smaller than that of the fins 220 close to the inlet 110. The fin body area of the heat dissipation fins 220 of the outlet 120 . Similarly, along the direction from approaching the inlet 110 to approaching the outlet 120 , the fin body area of the heat dissipation fins 220 may be increased or sequentially increased, and may be selected and set according to actual needs. For example, the area of the heat dissipation fins 220 close to the inlet 110 can be set to be 1/3-1/2 of the area of the heat dissipation fins 220 close to the exit 120; From the direction from the inlet 110 to the outlet 120 , the area of the heat dissipation fins 220 may be increased by about 10% for each additional row of the battery pack 200 . The proportion of the area of the heat dissipation fins 220 increasing in order is proportional to the overall structural size of the energy storage battery box, the spacing between each row of cell groups 200 and the spacing between the cells 210 in each cell group 200 are both fixed. The best setting results can be obtained through actual experimental tests and calculations.

A second aspect of the present invention provides an energy storage system, which includes a box body and a battery insertion box bracket disposed in the box body, and the energy storage battery described in the above two embodiments is fixed on the battery box insertion bracket. Insert box. Due to the charging and discharging process of the lithium battery in the container, a lot of heat will be released. The cooling air released by the fan or air conditioner is sent into the battery pack through the air duct. The energy storage battery insert box of the utility model realizes the reduction of the temperature difference between the cells inside the energy storage insert box and ensures the uniformity of the temperature of the lithium battery through the above-mentioned structural arrangement of the heat dissipation fins. The invention solves the defect that the heat transfer between the cells of the existing energy storage battery box and the air is convection, and the temperature of the cold air flowing to the rear exhaust air is higher, resulting in a reduction in the heat dissipation of the cells in the rear row and an increase in the temperature of the cells. When the temperature of the cooling air gradually increases, the total number of heat exchange fins arranged between each row of cells with a fixed number and a gradually increasing sheet area or a fixed sheet area and an increased number of heat exchange fins can be used to change the total number of cells. Heat exchange area, so that the heat dissipation of each cell is relatively similar, and the heat exchange of the box cell is similar, which ensures the uniformity of the cell temperature and enables the cell to obtain a good cycle life. The simulation analysis results show that the temperature difference between the cells arranged in different positions in the energy storage system is lower than 1℃, which has a great advantage compared with similar products. Therefore, the utility model creates a working environment with better temperature difference for the lithium battery, which can make the battery obtain better temperature uniformity and create temperature conditions for the energy storage battery to obtain high cycle times.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention. For example, the straight heat dissipation fins in the above-mentioned embodiments of the present invention can be changed to bent or curved heat dissipation fins , to further increase the total heat dissipation area of the heat dissipation fins. In order to avoid unnecessary repetitions, various possible combinations are not described in the present invention. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention, and all belong to the protection scope of the present invention.

Claims (10)

1. An energy storage battery plug box comprises a base (100) and a plurality of rows of electric core groups (200) fixed on the base (100), wherein each row of electric core group (200) comprises a plurality of electric cores (210) arranged at equal intervals, and is characterized in that heat dissipation fins (220) are arranged between every two adjacent electric cores (210); the energy storage battery plug box is internally provided with an inlet (110) and an outlet (120) for radiating cooling air, and the total heat dissipation area of the heat dissipation fins (220) in the electric core group (200) close to the inlet (110) is smaller than the total heat dissipation area of the heat dissipation fins (220) in the electric core group (200) close to the outlet (120).

2. The energy storage battery box according to claim 1, wherein all the heat dissipation ribs (220) arranged in the energy storage battery box have the same sheet area, and the number of the heat dissipation ribs (220) adjacent to the inlet (110) is smaller than the number of the heat dissipation ribs (220) adjacent to the outlet (120).

3. The energy storage battery compartment according to claim 2, characterized in that the heat dissipation ribs (220) are arranged in successively increasing amounts in a direction from adjacent to the inlet (110) to adjacent to the outlet (120).

4. The energy storage battery box of claim 3, characterized in that the number of the cell groups (200) is three, and the direction from the inlet (110) to the outlet (120) is sequentially a first row (001), a second row (002) and a third row (003), and the number of the heat dissipation fins (220) arranged between the cells (210) of the first row (001), the second row (002) and the third row (003) is sequentially 2, 3 and 4.

5. The energy storage battery box of claim 1, wherein the number of the heat dissipation ribs (220) between the cells (210) of each row of the cell pack (200) disposed in the energy storage battery box is equal, and the sheet area of the heat dissipation ribs (220) near the inlet (110) is smaller than the sheet area of the heat dissipation ribs (220) near the outlet (120).

6. The energy storage battery box according to claim 5, characterized in that the fin body area of the heat dissipation fins (220) increases in sequence in a direction from near the inlet (110) to near the outlet (120).

7. The energy storage battery box of claim 6, characterized in that the fin area of the heat dissipation fins (220) near the inlet (110) is 1/3-1/2 of the fin area of the heat dissipation fins (220) near the outlet (120).

8. The energy storage battery plug box of claim 1, characterized in that the direction of the body of the heat dissipation rib (220) is perpendicular to the direction of the side wall of the battery cell (210).

9. The energy storage battery plug box of claim 1, characterized in that the number of the heat dissipation ribs (220) between adjacent cells (210) is multiple.

10. An energy storage system, comprising a box body and a battery plug box support arranged in the box body, wherein the battery plug box support is fixed with an energy storage battery plug box according to any one of claims 1 to 9.

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