Air cooling structure for energy storage battery box

Abstract

The air cooling structure for the energy storage battery box comprises a box body and two rows of battery packs arranged in the box body, each battery pack comprises a plurality of battery cell cavities arranged linearly, battery cells are arranged in the battery cell cavities, an air duct is arranged between the two rows of battery packs, one end of the air duct is provided with a suction structure, and the other end of the air duct is provided with an air outlet. A plurality of air inlet structures are arranged on the two sides of the air duct respectively, the air inlet structures communicate with the air cooling plates in a butt joint mode, and the air cooling plates are arranged between every two adjacent battery cell cavities; upper air inlets are respectively formed in two sides of the box body, are staggered with the air cooling plates, and are arranged towards the battery cells. According to the air cooling structure for the energy storage battery box provided by the utility model, each position of the battery box is uniformly cooled, so that the voltage of each battery cell in a battery pack is consistent, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery boxes, and in particular relates to an air cooling structure for an energy storage battery box. Background Art

[0002] The energy storage battery box uses lithium-ion batteries, which generate heat during the charging and discharging process. The heat comes from the internal resistance of the battery itself. The more batteries there are in the battery box, the more heat is generated. As the heat accumulates, the temperature of the internal environment of the battery box increases significantly. The life of the battery is closely related to its operating temperature. Some test data show that when it is operated at 50 degrees Celsius for a long time, its cycle life decreases by 60%. Operating at high temperatures can also easily cause thermal runaway of battery materials, causing a series of thermal side reactions, which have a great impact on the life and safety of the battery.

[0003] In traditional air cooling, the heat dissipation method of the front and back of the battery box is often adopted. However, the internal space of the container is limited and closed, and the air is difficult to circulate, resulting in uneven heat dissipation of the battery cells in the battery box and consistency problems in the battery pack, causing some voltages in the battery pack to be high and some voltages to be low, thereby leading to overcharging, over-discharging, reverse polarity, lithium dendrites and internal short circuits, etc., which will eventually cause the battery pack to catch fire, explode, and thermal runaway, affecting system safety.

[0004] Therefore, how to make the heat dissipation of the battery box uniform from front to back, this solution solves this technical problem. Utility Model Content

[0005] The utility model aims to provide an air cooling structure for an energy storage battery box, which solves the technical problem of how to make the heat dissipation at each position of the battery box uniform, so that the voltage of each battery cell in the battery pack is consistent, avoiding safety hazards.

[0006] An air cooling structure for an energy storage battery box, comprising a box body, two rows of battery packs arranged in the box body, the battery pack comprising a plurality of battery cell cavities arranged in a straight line, battery cells being arranged in the battery cell cavities, an air duct being arranged between the two rows of battery packs, a suction structure being arranged at one end of the air duct, a plurality of air inlet structures being arranged at both sides of the air duct, the air inlet structures being connected to an air cooling plate, and the air cooling plate being arranged between two adjacent battery cell cavities;

[0007] Upper air inlets are respectively arranged on both sides of the box body, and the upper air inlets are staggered with the air cooling plate and arranged toward the battery core.

[0008] The upper air inlet is in the shape of a vertically arranged long strip, and the sizes of the upper air inlets decrease gradually along the suction structure.

[0009] The suction structure includes a plurality of exhaust fans and chips connected to the exhaust fans. The exhaust fans and the chips are both arranged outside the box, and the exhaust fans and the chips are both powered by the battery pack.

[0010] The air inlet structure comprises a plurality of upper inlets and a plurality of lower inlets, wherein the plurality of upper inlets are arranged with equal sizes, and the plurality of lower inlets are gradually decreased in a direction toward the suction structure.

[0011] The box body comprises a bottom cover and an upper cover which are snap-fitted and connected to each other, and an end cover arranged at the same end of the bottom cover and the upper cover, and the upper air inlet is arranged on the upper cover.

[0012] The bottom cover is provided with a plurality of lower air inlets, and the lower air inlets are arranged toward the battery core.

[0013] Handles are respectively arranged on both sides of the end cover, and a positive electrode interface, a negative electrode interface and the chip are arranged on the end cover.

[0014] The positive effects of the utility model are as follows:

[0015] (1) The upper and lower air inlets are staggered with the air cooling plate and face the battery cells. When air enters, it helps to bring the heat of the battery cells to the air cooling plate.

[0016] (2) The sizes of the upper air inlet and the lower air inlet vary in a gradient. The upper air inlet and the lower air inlet closer to the exhaust fan are smaller in size, while the upper air inlet and the lower air inlet farther from the exhaust fan are larger in size. This conforms to the principle that the exhaust intensity decreases in the air duct, ensuring the uniformity of air cooling at all positions in the box.

[0017] (3) An air duct is provided, which is a common air duct for each battery cell, so that each position can extract air strongly, and the air volume at the total air outlet position is gathered, which not only saves space but also increases the air cooling efficiency;

[0018] (4) An air cooling plate is provided to dissipate heat between the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of the energy storage battery box in the utility model.

[0020] Figure 2 It is a schematic diagram of the internal structure of the energy storage battery box in the utility model.

[0021] Figure 3 It is a structural schematic diagram of the air cooling structure in the utility model.

[0022] Figure 4 It is a structural schematic diagram of the air duct in the utility model.

[0023] Figure 5 It is a schematic diagram of the structure of the film covering and air cooling plate in the utility model.

[0024] Figure 6 It is a schematic diagram of the connection structure of the upper cover and the bottom cover in the utility model.

[0025] Figure 7 It is a schematic diagram of the connection structure of the battery cell and the air cooling plate in the utility model.

[0026] Among them, the figure markings are: 1. upper cover; 2. chip; 3. handle; 4. end cover; 5. bus bar; 6. exhaust fan; 61. air duct; 62. upper inlet; 621. lower inlet; 63. coating; 64. air cooling plate; 7. bottom cover; 71. lower air inlet; 8. upper air inlet; 9. connecting row integrated board; 10. battery cell. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0028] See also Figure 1-Figure 7 A wind cooling structure for an energy storage battery box includes a box body, two rows of battery packs arranged in the box body, the battery pack includes a plurality of battery cell cavities arranged in a straight line, a battery cell 10 is arranged in the battery cell cavity, an air duct 61 is arranged between the two rows of battery packs, a suction structure is arranged at one end of the air duct 61, and a plurality of air inlet structures are arranged on both sides of the air duct 61, the air inlet structure is connected to the air cooling plate 64, and the air cooling plate 64 is arranged between two adjacent battery cell cavities;

[0029] Upper air inlets 8 are respectively provided on both sides of the box body. The upper air inlets 8 are arranged in a staggered manner with the air cooling plate 64 and are arranged toward the battery cell 10 .

[0030] More preferably, the top ends of a plurality of battery cells 10 are connected to a connecting bar integrated board 9 , and a bus bar is provided on the connecting bar integrated board 9 , which belongs to the prior art and will not be described in detail here.

[0031] The upper air inlet 8 is in the shape of a vertically arranged long strip, and the sizes of the upper air inlets 8 decrease gradually along the suction structure.

[0032] The suction structure includes a plurality of exhaust fans 6 and chips 2 connected to the exhaust fans 6. The exhaust fans 6 and the chips 2 are both arranged outside the box, and the exhaust fans 6 and the chips 2 are both powered by a battery pack.

[0033] The air inlet structure includes a plurality of upper inlets 62 and a plurality of lower inlets 621 . The plurality of upper inlets 62 are arranged with equal sizes, and the plurality of lower inlets 621 are arranged with decreasing gradients in the direction of the suction structure.

[0034] The box body comprises a bottom cover 7 and an upper cover 1 which are snap-fitted to each other, an end cover 4 arranged at the same end of the bottom cover 7 and the upper cover 1 , and an upper air inlet 8 is arranged on the upper cover 1 .

[0035] The bottom cover 7 is provided with a plurality of lower air inlets 71 , and the lower air inlets 71 are arranged toward the battery cells 10 .

[0036] Handles 3 are respectively provided on both sides of the end cover 4 , and a positive electrode interface, a negative electrode interface and a chip 2 are provided on the end cover 4 .

[0037] More preferably, the outer side of the air cooling plate 64 is covered with a coating 63 .

[0038] The specific working process of this utility model:

[0039] The upper air inlet 8 and the lower air inlet 71 are arranged in a staggered manner with the air cooling plate 64 and face the battery cell 10 , which helps to drive the heat of the battery cell 10 into the air cooling plate 64 when air is introduced;

[0040] The sizes of the upper air inlet 8 and the lower inlet 621 vary in a gradient manner. The upper air inlet 8 and the lower inlet 621 closer to the exhaust fan 6 are smaller in size, while the upper air inlet 8 and the lower inlet 621 farther from the exhaust fan 6 are larger in size. This is in line with the principle that the exhaust intensity decreases in the air duct 61, ensuring the uniformity of air cooling at each position in the box.

[0041] An air duct 61 is provided, which is a common air duct 61 for each battery cell 10, so that each position can extract air strongly, and the air volume at the total air outlet position is gathered, which not only saves space but also increases air cooling efficiency;

[0042] The air cooling plate 64 is provided to dissipate heat between the battery cells 10 .

[0043] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An air cooling structure for an energy storage battery box, comprising a box body, and two rows of battery packs arranged in the box body, wherein the battery pack comprises a plurality of battery cell cavities arranged in a straight line, wherein the battery cell cavities are provided with battery cells (10), characterized in that: An air duct (61) is provided between two rows of battery packs, a suction structure is provided at one end of the air duct (61), a plurality of air inlet structures are provided on both sides of the air duct (61), the air inlet structures are connected to and butted against an air cooling plate (64), and the air cooling plate (64) is provided between two adjacent battery cell cavities; Upper air inlets (8) are respectively arranged on both sides of the box body; the upper air inlets (8) are arranged in a staggered manner with the air cooling plate (64) and are arranged towards the battery core (10).

2. The air cooling structure for the energy storage battery box according to claim 1 is characterized in that: The upper air inlet (8) is in the shape of a vertically arranged long strip, and the sizes of the plurality of upper air inlets (8) change in a decreasing gradient along the suction structure.

3. The air cooling structure for the energy storage battery box according to claim 2 is characterized in that: The suction structure comprises a plurality of exhaust fans (6) and a chip (2) connected to the exhaust fans (6); the exhaust fans (6) and the chip (2) are both arranged outside the box; and the exhaust fans (6) and the chip (2) are both powered by the battery pack.

4. The air cooling structure for the energy storage battery box according to claim 1, characterized in that: The air inlet structure comprises a plurality of upper inlets (62) and a plurality of lower inlets (621), wherein the plurality of upper inlets (62) are arranged in equal sizes, and the plurality of lower inlets (621) are arranged in a decreasing gradient in a direction toward the suction structure.

5. The air cooling structure for the energy storage battery box according to claim 1, characterized in that: The box body comprises a bottom cover (7) and an upper cover (1) which are snap-fitted to each other, and an end cover (4) arranged at the same end of the bottom cover (7) and the upper cover (1), and the upper air inlet (8) is arranged on the upper cover (1).

6. The air cooling structure for the energy storage battery box according to claim 5, characterized in that: A plurality of lower air inlets (71) are provided on the bottom cover (7), and the lower air inlets (71) are arranged towards the battery core (10).

7. The air cooling structure for the energy storage battery box according to claim 6, characterized in that: Handles (3) are respectively provided on both sides of the end cover (4), and a positive electrode interface, a negative electrode interface and a chip (2) are provided on the end cover (4).

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