Battery cell pole column cooling type liquid cooling system

Abstract

The utility model discloses a battery cell pole column cooling type liquid cooling system which comprises a battery cell top cooling system which adopts an extrusion forming liquid cooling plate and is internally provided with an S-shaped cooling liquid flow channel formed by flow channel partition plates which are arranged in an equal-length and staggered manner; the battery cell pole column cooling system is fixedly connected with the battery cell top cooling system through brazing and comprises a plurality of pole column cooling pipelines which are vertically distributed, and the bottoms of all the pole column cooling pipelines are converged and connected with horizontal pipelines which are horizontally distributed; the cooling liquid inlets are formed in the two ends of the extrusion forming liquid cooling plate and are of a double-layer structure, and cooling liquid flows into the battery cell top cooling system and the battery cell pole column cooling system at the same time; and the cooling liquid outlet is formed in the extrusion forming liquid cooling plate, is positioned between the two cooling liquid inlets and is connected with the horizontal pipeline through an outlet pipeline. According to the utility model, the top surfaces of the battery cells and the pole columns can be simultaneously cooled, so that the temperature uniformity in the battery cells is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery technical field, concretely relates to the battery cell pole post cooling type liquid cooling system. BACKGROUND

[0002] Because the special structure inside the blade battery, the heat power of the heat conduction pole post position is maximum, therefore the temperature of the battery cell pole post position is relatively higher, and the battery cell pole post is generally metal material, and the heat conduction is strong. However, the existing liquid cooling plate does not involve cooling the battery cell pole post directly, which will cause the heat to continuously accumulate at the battery cell pole post position, and if it cannot be effectively and timely handled, it will cause the temperature difference in the battery cell to be too large, and then the thermal runaway phenomenon occurs. SUMMARY

[0003] The utility model discloses a battery cell pole post cooling type liquid cooling system, can cool the battery cell top surface and pole post simultaneously, and greatly improves the temperature uniformity in the battery cell.

[0004] To realize the above-mentioned purpose, the utility model discloses a battery cell pole post cooling type liquid cooling system, comprising:

[0005] The battery cell top cooling system adopts an extrusion forming liquid cooling plate, and the inside is provided with flow channel partition plates arranged in equal length and staggered to form S-shaped cooling liquid flow channels;

[0006] The battery cell pole post cooling system is fixed by brazing connection with the battery cell top cooling system, comprising a plurality of vertically distributed pole post cooling pipelines, and all the pole post cooling pipeline bottoms converge and connect horizontally distributed horizontal pipelines;

[0007] The cooling liquid inlet is arranged at both ends of the extrusion forming liquid cooling plate and adopts a double-layer structure, and the cooling liquid simultaneously flows into the battery cell top cooling system and the battery cell pole post cooling system;

[0008] The cooling liquid outlet is arranged on the extrusion forming liquid cooling plate, is located in the middle of the two cooling liquid inlets, and is connected with the horizontal pipeline through an outlet pipeline.

[0009] As a further scheme of the utility model, the cooling liquid inlet is a double-layer tubular structure, is located at both sides of the battery cell top cooling system, and is connected with the battery cell pole post cooling system.

[0010] As a further scheme of the utility model, the pole post cooling pipeline is in a C-shaped structure and is sleeved on the pole post side of the two ends of the blade battery cell, and internally contains a battery cell explosion-proof valve, a battery cell pole post and a busbar connected with adjacent battery cell pole posts, and the top of the pole post cooling pipeline is higher than the battery cell and is communicated with the cooling liquid inlet.

[0011] As a further scheme of the utility model, the side between the adjacent battery cells is provided with a battery cell interconnection sealing strip.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. Can realize cooling to the top of the battery cell and the pole position, greatly improve the temperature uniformity of the battery cell inside,

[0014] 2. Can realize that the cooling liquid in the profile liquid cooling plate is in at both ends and out in the middle, so that more heat can be taken away, the temperature of the both ends of the battery cell is higher under the battery pack cooling working condition, the cooling liquid temperature of the corresponding position needs to be lower, and more heat can be taken away,

[0015] 3. Because the pole cooling pipeline completely covers the battery cell explosion valve, when thermal runaway occurs, the high-temperature and high-pressure gas sprayed by the battery cell explosion valve can be directly discharged out of the battery pack from the cooling plate, secondary cross and secondary damage are avoided, and thermal and electric separation is realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure diagram of the battery cell pole cooling type liquid cooling system of the utility model.

[0017] Figure 2 It is the internal structure diagram of the battery cell pole cooling type liquid cooling system of the utility model.

[0018] In the drawing: 1, battery cell top cooling system, 2, battery cell pole cooling system, 3, cooling liquid inlet, 4, cooling liquid outlet, 5, battery cell interval sealing strip, 6, battery cell pole, 7, battery cell explosion valve, 8, busbar;

[0019] 1.1, extrusion forming liquid cooling plate, 1.2, flow channel partition plate, 1.3, S-shaped cooling liquid flow channel;

[0020] 2.1, pole cooling pipeline, 2.2, horizontal pipeline, 2.3, outlet pipeline. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings.

[0022] As Figure 1 And Figure 2 Indicated, the battery cell pole cooling type liquid cooling system comprises:

[0023] The battery cell top cooling system 1 adopts extrusion forming liquid cooling plate 1.1, and the inside is provided with flow channel partition plate 1.2 in equal length staggered arrangement and forms S-shaped cooling liquid flow channel 1.3;Can fully utilize the cooling liquid to carry out heat exchange, and facilitate the output of the heat-exchanged cooling liquid outward;

[0024] The cell pole cooling system 2 is fixed by brazing connection with the cell top cooling system 1, and comprises a plurality of vertically distributed pole cooling pipelines 2.1, and all the pole cooling pipelines 2.1 are connected with a horizontally distributed horizontal pipeline 2.2 at the bottom; each cell pole 6 can be cooled by the cooling liquid, and the cell internal temperature uniformity is more favorable;

[0025] The cooling liquid inlet 3 is arranged at both ends of the extrusion formed liquid cooling plate 1.1, adopts a double-layer structure, and the cooling liquid flows into the cell top cooling system 1 and the cell pole cooling system 2 at the same time;

[0026] The cooling liquid outlet 4 is arranged on the extrusion formed liquid cooling plate 1.1 and located between the two cooling liquid inlets 3, and is connected with the horizontal pipeline 2.2 through an outlet pipeline 2.3.

[0027] In order that the cell top cooling system 1 and the cell pole cooling system 2 can be cooled synchronously, further, the cooling liquid inlet 3 is a double-layer tubular structure, is located at both sides of the cell top cooling system 1, and is connected with the cell pole cooling system 2.

[0028] In order to realize thermal-electric separation and provide a good cooling effect for the cell pole 6, further, the pole cooling pipeline 2.1 is in a C-shaped structure and is sleeved on the pole side of the blade cell at both ends, internally contains the cell explosion-proof valve 7, the cell pole 6 and the busbar 8 connected with adjacent cell poles 6, and the top of the pole cooling pipeline 2.1 is higher than the cell and is communicated with the cooling liquid inlet 3.

[0029] Since there is a gap between the cells, in order to prevent the cooling liquid from flowing into the cells and being in contact with electrical components, a short circuit phenomenon is easily caused, and further, the side between adjacent cells is provided with a cell gap sealing strip 5.

[0030] In use, the cooling liquid enters from the cooling liquid inlet 3 first, the cooling liquid is divided into two parts by the double-layer structure of the cooling liquid, and enters the cell top cooling system 1 and the cell pole cooling system 2 respectively.

[0031] After the cooling liquid enters the cell top cooling system 1, the cooling liquid flows in the S-shaped cooling liquid flow channel 1.3, cools the top of the cell, is collected to the middle flow channel, and finally flows out of the cell top cooling system 1 through the cooling liquid outlet 4;

[0032] After the cooling liquid enters the cell pole cooling system 2, the cooling liquid flows through each pole cooling pipeline 2.1 branch, cools each cell pole 6, is then collected to the horizontal pipeline 2.2, and finally is collected to the cooling liquid outlet 4 and flows out of the cell pole cooling system 2; if the cell occurs thermal runaway, the high-temperature and high-pressure waste gas sprayed by the cell explosion-proof valve 7 can directly enter the pole cooling pipeline 2.1, can effectively prevent the waste gas from crossing with electrical components, avoids a short circuit phenomenon, and can realize thermal-electric separation.

Claims

1. A liquid cooling system of the type used to cool the poles of an electric cell, characterized in that, Comprise: The top of the battery cooling system (1) is made of extrusion liquid cooling plate (1.1), which is internally provided with flow channel partition (1.2) arranged in equal length and staggered to form S-shaped cooling liquid flow channel (1.3); The battery pole cooling system (2) is connected and fixed with the top of the battery cooling system (1) by brazing, comprising a plurality of vertically distributed pole cooling pipes (2.1), and all the bottom of the pole cooling pipes (2.1) is connected with the horizontally distributed horizontal pipes (2.2); The cooling liquid inlet (3) is provided at both ends of the extrusion liquid cooling plate (1.1) and adopts double-layer structure, and the cooling liquid flows into the top of the battery cooling system (1) and the battery pole cooling system (2) at the same time; The cooling liquid outlet (4) is provided on the extrusion liquid cooling plate (1.1) and is located between the two cooling liquid inlets (3) and is connected with the horizontal pipes (2.2) through the outlet pipes (2.3).

2. The cell post cooling type liquid cooling system of claim 1, wherein, The cooling liquid inlet (3) is double-layer tubular structure, which is located on both sides of the top of the battery cooling system (1) and is connected with the battery pole cooling system (2).

3. The cell post cooling type liquid cooling system according to claim 1 or 2, characterized by, The pole cooling pipe (2.1) is C-shaped structure which is wrapped around the pole side of the blade battery at both ends, and internally contains the battery explosion-proof valve (7), the battery pole (6) and the busbar (8) connected with the adjacent battery pole (6), and the top of the pole cooling pipe (2.1) is higher than the battery and is communicated with the cooling liquid inlet (3).

4. The cell post cooling type liquid cooling system of claim 3, wherein, The side between the adjacent batteries is provided with the battery intercell seal (5).

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