CN218975586U

CN218975586U - Immersion liquid cooled battery pack

Info

Publication number: CN218975586U
Application number: CN202320140139.0U
Authority: CN
Inventors: 房雨辰; 蔡青; 邢会娟; 汪承晔
Original assignee: Qidong Wotai New Energy Co ltd
Current assignee: Qidong Wotai New Energy Co ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-05-05
Anticipated expiration: 2033-02-02

Abstract

The utility model relates to an immersed liquid cooling type battery pack, which belongs to the technical field of energy storage and comprises a battery cell and a battery cell chamber for storing the battery cell, wherein a first cooling liquid is arranged in the battery cell chamber, the battery cell is immersed in the first cooling liquid, a liquid cooling radiating fin is arranged above the first cooling liquid, two ends of the liquid cooling radiating fin are connected with radiating pipes, the liquid cooling radiating fin is communicated with the inside of the radiating pipes to form an internal channel, a second cooling liquid is arranged in the internal channel, a pump is arranged on the radiating pipes, the second cooling liquid flows by supplying power through the pump, and radiating pieces are arranged on the radiating pipes. According to the utility model, the battery cell can be directly contacted with the cooling liquid, so that the heat dissipation area is furthest increased, and the cooling capacity is improved; and meanwhile, the liquid cooling fin performs heat exchange with the first cooling liquid, so that the utilization rate of the first cooling liquid can be improved, and the cost is reduced.

Description

Immersion liquid cooled battery pack

Technical Field

The utility model relates to the technical field of energy storage, in particular to an immersed liquid cooling type battery pack.

Background

At present, the existing battery pack cooling adopts liquid cooling, airflow cooling, phase change medium cooling, heat pipe cooling and other modes. In these modes, the air flow cooling structure is the simplest, but the problems of small cooling capacity, large temperature difference among battery cells, influenced battery life, limited discharge power and the like exist, and although the problems can be compensated by adjusting battery materials, the problems are mostly caused by the loss of the storage capacity.

The liquid cooling generally cools the battery pack in a liquid cooling plate mode, and the heat emitted by the battery pack is taken away through the flow of the cooling liquid in the liquid cooling plate, so that the cooling capacity is better than that of air flow cooling, and when the battery pack continuously generates high heat, the liquid cooling plate cannot meet ideal requirements; although some liquid cooling adopts immersion cooling, and a cooling liquid with dielectric and nonflammable characteristics is used, and the battery is immersed in the cooling liquid to be in direct contact with the cooling liquid, so that heat can be directly and effectively transferred into the cooling liquid to achieve an efficient cooling effect, the boiling point of the cooling liquid is low, and a large amount of the cooling liquid is gasified into gas after heat exchange, so that the cooling liquid cannot be reused, and the cost is too high.

Therefore, there is a need for a recyclable submerged liquid cooled battery with good cooling capacity.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides an immersed liquid-cooled battery pack.

The technical scheme of the utility model is as follows:

the utility model provides an submergence liquid cooling group battery, includes the electric core and deposits the electric core room of electric core, be equipped with first coolant liquid in the electric core room, the electric core submergence is in the first coolant liquid, first coolant liquid top is equipped with liquid cooling fin, the cooling tube is all connected at the both ends of liquid cooling fin, liquid cooling fin with the cooling tube is inside to be communicated with each other, forms the internal passageway, be equipped with the second coolant liquid in the internal passageway, be equipped with the pump on the cooling tube, the second coolant liquid passes through the pump provides power and flows, be equipped with the radiating piece on the cooling tube.

As a further improvement of the utility model, the liquid cooling fin comprises a fin tube and a plurality of fins sleeved on the fin tube, and the fin tube is connected with the fin tube.

As a further improvement of the present utility model, the liquid-cooled fin and the radiating pipe form a loop.

As a further improvement of the utility model, the radiating pipe is provided with a vacuum chamber, and the pressure in the vacuum chamber is lower than the external pressure.

As a further improvement of the utility model, a pressure sensor is arranged in the vacuum chamber.

As a further improvement of the utility model, the heat sink is a heat exchanger or a heat sink.

As a further improvement of the utility model, a spring relief valve is arranged at the top of the battery cell chamber.

As a further improvement of the utility model, the surface of the spring relief valve close to the first cooling liquid is provided with an anti-corrosion coating or a pipe coating.

As a further improvement of the utility model, a gap is arranged between the battery cells.

As a further improvement of the utility model, the first cooling liquid is a fluoridation liquid, and the second cooling liquid is an automobile cooling liquid.

According to the utility model of the scheme, the beneficial effects of the utility model are as follows:

according to the utility model, the battery cell can be directly contacted with the cooling liquid, so that the heat dissipation area is furthest increased, and the cooling capacity is improved; and meanwhile, the liquid cooling fin performs heat exchange with the first cooling liquid, so that the utilization rate of the first cooling liquid can be improved, and the cost is reduced.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure: 1. a battery cell; 2. a first cooling liquid; 3. cooling the heat dissipation fin; 4. a heat radiating pipe; 5. a second cooling liquid; 6. a vacuum chamber; 7. a pump; 8. a spring relief valve; 9. and a heat sink.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1, the utility model provides an immersed liquid cooling type battery pack, which comprises a battery cell 1 and a battery cell chamber for storing the battery cell 1, wherein a first cooling liquid 2 is arranged in the battery cell chamber, the battery cell 1 is immersed in the first cooling liquid 2, a gap is arranged between the battery cells 1, the battery cell 1 is contacted with the first cooling liquid 2 to the greatest extent, a liquid cooling fin 3 is arranged above the first cooling liquid 2, two ends of the liquid cooling fin 3 are connected with a radiating pipe 4, the liquid cooling fin 3 is communicated with the inside of the radiating pipe 4 to form an internal channel, a second cooling liquid 5 is arranged in the internal channel, a pump 7 is arranged on the radiating pipe 4, the second cooling liquid 5 provides power for flowing through the pump 7, and a radiating piece 9 is arranged on the radiating pipe 4; and meanwhile, the liquid cooling fin 3 exchanges heat with the first cooling liquid 2, so that the utilization rate of the first cooling liquid 2 can be improved, and the cost is reduced.

Preferably, the liquid cooling fin 3 includes a fin tube and a plurality of fins, the fins are copper sheets or other fins, the fins are arranged on the fin tube in an array mode, the fin tube is connected with the radiating tube 4, the liquid cooling fin 3 and the radiating tube 4 form a loop, the second cooling liquid 5 can circulate in the liquid cooling fin 3 and the radiating tube 4, and the utilization efficiency of the second cooling liquid 5 is improved.

Preferably, the heat exchange performed by the radiating pipe 4 can be performed in two ways, namely, in a first way: the heat radiating piece 9 is a heat exchanger, the heat radiating pipe 4 is provided with the heat exchanger, and the heat exchanger discharges heat through the compressor, the evaporator, the expansion valve and the condenser; mode two: the radiating piece 9 is a radiating fin, a plurality of radiating fins are arranged on the radiating tube 4, and the radiating tube 4 directly exchanges heat with air through the radiating fin to radiate heat.

When the electric core cooling device works, the first cooling liquid 2 absorbs heat emitted by the electric core 1, after the first cooling liquid 2 reaches a boiling point, the first cooling liquid 2 is gasified into gaseous cooling liquid, the gaseous first cooling liquid 2 contacts the radiating fins to transfer the heat to the radiating fins, and the gaseous first cooling liquid 2 is liquefied again into liquid first cooling liquid 2 and falls; meanwhile, the heat radiating fins transfer heat to the second cooling liquid 5 in the heat radiating fin pipes, and the second cooling liquid 5 flows in the liquid cooling heat radiating fins 3 and the heat radiating pipes 4 under the pushing of the pump 7 and radiates heat through the heat radiating piece.

Preferably, the radiating pipe 4 is provided with a vacuum chamber 6, the pressure in the vacuum chamber 6 is lower than the external pressure, and the leakage of the second cooling liquid 5 is avoided and the safety is improved in a negative pressure diversion mode.

Preferably, the vacuum chamber 6 can take two designs, structure one: the vacuum chamber 6 is a closed space, before the second cooling liquid 5 is added, the vacuum chamber 6 is vacuumized, the pressure in the vacuum chamber 6 and the radiating pipe 4 reaches a set value, the set value is smaller than the atmospheric pressure, the second cooling liquid 5 is pressed into the radiating pipe 4, the liquid cooling radiating fin 3 and the vacuum chamber 6 by using the atmospheric pressure, after the liquid injection is finished, whether the liquid level of the vacuum chamber 6 reaches a proper position or not is observed, if the liquid level is proper, the process is finished, if the liquid level is improper, the second cooling liquid 5 is pumped out, the set value is increased or reduced according to the actual situation, and the vacuum chamber 6 is vacuumized again for the liquid injection; and (2) a structure II: the vacuum chamber 6 is connected with a vacuum pump, the second cooling liquid 5 is firstly injected into the liquid cooling radiating fin 3, the radiating pipe 4 and the vacuum chamber 6, then the vacuum pump is utilized to vacuumize, the liquid level in the vacuum chamber 6 reaches a proper position, and the vacuum pump is turned off. The two structures have respective advantages, and the first structure can find whether the whole system has leakage or not in the vacuumizing stage, so that hidden danger caused by leakage in the conventional liquid injection process is avoided; the second structure can more conveniently adjust the pressure in the vacuum chamber 6, does not need to calculate the pressure required by the system in advance, and can be adjusted in real time according to actual conditions after the liquid injection is completed.

When the liquid cooling fin 3 or the radiating pipe 4 is damaged, the second cooling liquid 5 is pressed into the vacuum chamber 6 by atmospheric pressure, so that potential safety hazards caused by leakage of the second cooling liquid 5 are avoided, and the overall use safety is improved.

Preferably, a pressure sensor is arranged in the vacuum chamber 6, an operator can monitor the pressure value in the vacuum chamber 6 in real time, and if the pressure value in the vacuum chamber 6 changes, the operator can find and overhaul in time, so that the risk expansion is avoided.

Preferably, a spring relief valve 8 is arranged at the top of the battery cell chamber, when the heat of the battery cell 1 is overlarge and the first cooling liquid 2 is gasified into gas in a large quantity, the pressure in the battery cell chamber rises sharply, and when the pressure exceeds the threshold value of the spring relief valve 8, the spring relief valve 8 is opened to relieve the pressure, so that the safety is ensured; the surface of the spring relief valve 8, which is close to the first cooling liquid 2, is provided with an anti-corrosion coating or a pipe coating, so that the corrosion of the first cooling liquid 2 to the spring relief valve 8 is reduced, and the overall service life and the use safety are improved.

Preferably, the first cooling liquid 2 is a fluoridation liquid and the second cooling liquid 5 is an automotive cooling liquid or other cooling liquid, such as water.

In summary, the utility model provides an immersed liquid-cooled battery pack, which can directly contact the battery cell 1 with cooling liquid, thereby maximally improving the heat dissipation area and the cooling capacity; meanwhile, the liquid cooling fin 3 exchanges heat with the first cooling liquid 2, so that the utilization rate of the first cooling liquid 2 can be improved, and the cost is reduced; the liquid cooling fin 3 and the radiating pipe 4 form a loop, and the second cooling liquid 5 can circularly flow in the liquid cooling fin 3 and the radiating pipe 4, so that the utilization efficiency of the second cooling liquid 5 is improved; the pressure in the vacuum chamber 6 is lower than the external pressure, so that the leakage of the cooling liquid is avoided and the safety is improved by a negative pressure diversion mode; the pressure sensor can monitor the pressure value in the vacuum chamber 6 in real time, and operators can find and overhaul in time when the pipeline leakage occurs, so that the risk expansion is avoided; the spring pressure release valve 8 can be automatically opened when the pressure in the battery cell chamber is overlarge, so that the pressure in the battery cell chamber is ensured to be stable; the surface of the spring relief valve 8, which is close to the first cooling liquid 2, is provided with an anti-corrosion coating or a pipe coating, so that the corrosion of the first cooling liquid 2 to the spring relief valve 8 is reduced, and the overall service life and the use safety are improved.

It is emphasized that: the above embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. The utility model provides a submergence liquid cooling group battery, its characterized in that, includes electric core (1) and deposits the electric core room of electric core (1), be equipped with first coolant liquid (2) in the electric core room, electric core (1) submergence is in first coolant liquid (2), first coolant liquid (2) top is equipped with liquid cooling fin (3), cooling tube (4) are all connected at the both ends of liquid cooling fin (3), liquid cooling fin (3) with cooling tube (4) inside communicates with each other, forms the internal passageway, be equipped with second coolant liquid (5) in the internal passageway, be equipped with pump (7) on cooling tube (4), second coolant liquid (5) are through pump (7) provide power and flow, be equipped with radiator (9) on cooling tube (4).

2. The immersed liquid-cooled battery according to claim 1, wherein the liquid-cooled heat sink fin (3) comprises a heat sink fin tube and a plurality of heat sink fins sleeved on the heat sink fin tube, and the heat sink fin tube is connected with the heat sink tube (4).

3. The submerged liquid-cooled battery according to claim 1, characterized in that the liquid-cooled heat sink fin (3) forms a loop with the heat pipe (4).

4. The immersed liquid cooled battery according to claim 1, wherein a vacuum chamber (6) is provided on the radiating pipe (4), and the pressure in the vacuum chamber (6) is lower than the external pressure.

5. The submerged liquid-cooled battery according to claim 4, wherein a pressure sensor is provided in the vacuum chamber (6).

6. The submerged liquid cooled battery according to claim 1, characterized in that the heat sink (9) is a heat exchanger or a heat sink.

7. The immersion liquid cooled battery according to claim 1, characterized in that the top of the cell chamber is provided with a spring relief valve (8).

8. The submerged liquid cooled battery according to claim 7, characterized in that the surface of the spring relief valve (8) close to the first cooling liquid (2) is provided with an anti-corrosion coating or a pipe coating.

9. The immersion liquid cooled battery according to claim 1, characterized in that a gap is provided between the cells (1).

10. The immersion liquid cooled battery according to claim 1, characterized in that the first cooling liquid (2) is a fluorinated liquid and the second cooling liquid (5) is an automotive cooling liquid.