Battery pack cooling structure for energy storage charging station

Abstract

The utility model discloses a battery pack cooling structure for an energy storage charging station, which comprises liquid cooling plates, each liquid cooling plate is provided with a group of corresponding liquid inlet valves and liquid outlet valves, and the liquid inlet valves and the liquid outlet valves are controlled to be opened or closed at the same time; the liquid cooling plate is further provided with a conduction surface and a heat dissipation surface which are opposite to each other, the conduction surface is attached to the top surface of the battery pack, and heat dissipation fins are arranged on the heat dissipation surface; the air supply pipeline communicates with an air outlet of the air conditioner cooling system; the air return pipeline communicates with an air return opening of the air conditioner cooling system; the air supply pipeline is provided with an air outlet, the air return pipeline is provided with an air return opening, and the air outlet and the air return opening are oppositely arranged in the extending direction of the cooling fins. The direction of cooling liquid flowing in the liquid cooling cavity intersects with the extending direction of the heat dissipation fins. The battery in the energy storage box body can be charged and discharged in a charging and discharging environment at an ideal temperature, so that the reuse performance of the waste battery is improved, and the reuse cost of the vehicle retired power battery is controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of retired vehicle power battery whole package recycling, and particularly relates to a battery pack cooling structure for energy storage charging station. BACKGROUND

[0002] When new energy vehicles just entered the domestic market, in order to deal with the retirement of power battery, the concept of ladder utilization has been put forward, and the extension of enterprise's responsibility, battery production transaction, use management, disassembly and recycling and quality safety guarantee and other links are standardized, and relevant enterprises also follow up and start the research and development of battery recycling technology.

[0003] For example, in the use of energy storage box, through peak-shaving charging and discharging of the energy storage box to reduce the purpose of electricity cost; generally, the battery will generate a certain amount of heat when discharging, when the heat is too high to make the battery temperature exceed the normal use temperature range value, the battery performance will be reduced, and the cycle life of the battery will be reduced, if the ambient temperature is high, and the battery pack generates heat itself when charging, if necessary cooling measures are not taken, the temperature of the battery pack will continue to rise and exceed 30 DEG C, and even the local temperature reaches more than 60 DEG C, which has the risk of fire and explosion; the difference of such temperature has greater influence on waste batteries, and the performance of the battery pack will be reduced when the temperature is too high or too low, so the battery cooling system needs to control the temperature to reach an optimal state.

[0004] In the prior art, when the battery pack is cooled by using the liquid cooling system and the air conditioning air supply in the energy storage box, the cooling method is simply turned on and off, when the cooling function is turned on, the cooling system is in full load working state, that is, the battery is cooled by using fixed temperature cooling liquid, and the air conditioning temperature is controlled to control the temperature of the environment in the energy storage box at all times, which is easy to cause high energy consumption and lead to energy waste; and because the waste battery is reused, the number of cycles of the corresponding cooling liquid in the battery pack is reduced, the temperature control accuracy of the battery pack is poor, especially in the closed energy storage box, the thermal influence is large, the charging and discharging of the energy storage battery are affected, the battery cannot be in the ideal temperature charging and discharging environment, and it is basically difficult to reach the preset service life and is scrapped in advance, and the recycling cost of waste battery exceeds the expectation.

[0005] Therefore, in order to solve the above problems, a battery pack cooling structure for energy storage charging station is needed, which can make the battery charging and discharging in the energy storage box be in an ideal temperature charging and discharging environment, improve the reuse performance of waste battery, and control the recycling cost of retired vehicle power battery. Utility model content

[0006] Therefore, the utility model discloses a battery pack cooling structure for energy storage charging station can make the battery of energy storage box body charge-discharge in the ideal temperature charge-discharge environment, improve the performance of waste battery reuse, control the cost of retired power battery reuse for vehicle.

[0007] The utility model discloses a battery pack cooling structure for energy storage charging station, including liquid cooling board, the liquid cooling board has liquid cooling cavity, the liquid cooling cavity has the liquid inlet of communication in the battery pack liquid cooling system liquid supply end and the liquid outlet of communication in the battery pack liquid cooling system back liquid end,

[0008] The liquid inlet of liquid cooling cavity is provided with the liquid inlet valve that is controlled to open and close, the liquid outlet of liquid cooling cavity is provided with the liquid outlet valve that is controlled to open and close, and each liquid cooling board has a corresponding liquid inlet valve and liquid outlet valve, the liquid outlet valve is controlled to open or close at the same time with the liquid inlet valve,

[0009] The liquid cooling board also has opposite conduction surface and radiating surface, and the conduction surface is attached to the top surface of the battery pack, and the radiating surface is provided with radiating fins;

[0010] It also includes the air supply pipeline that is communicated at the air outlet of air conditioning cooling system and the air return pipeline that is communicated at the air return of air conditioning cooling system,

[0011] The air supply pipeline has an air outlet, the air return pipeline has an air return, and the air outlet and the air return are oppositely arranged in the extension direction of the radiating fins,

[0012] The direction of the cooling liquid circulating in the liquid cooling cavity intersects the extension direction of the radiating fins.

[0013] Further, the battery pack is stacked in the height direction in the box body of energy storage charging station, and a group of liquid cooling boards are correspondingly arranged on each battery pack,

[0014] The air supply pipeline extends in the height direction, the air supply pipeline is arranged at the rear side of the end of the liquid cooling board, the air supply pipeline is provided with an air guide plate for guiding gas to the air outlet, and the air guide plate is provided with a shunt hole or the air guide plate and the inner wall of the air supply pipeline form a shunt hole,

[0015] The number of air outlets of the air supply pipeline is consistent with the number of liquid cooling boards, the air outlets are arranged at the rear end of the liquid cooling boards in a one-to-one correspondence, the number of air guide plates is consistent with the number of air outlets, and the air guide plates are arranged at the rear end of the air outlets in a one-to-one correspondence.

[0016] The air return pipeline extends in the height direction, the air return pipeline is arranged at the front side of the front end of the liquid cooling board, the number of air returns of the air return pipeline is consistent with the number of liquid cooling boards, and the air returns are arranged at the front end of the liquid cooling boards in a one-to-one correspondence.

[0017] Further, the battery pack and the liquid cooling plate have a temperature difference, if the temperature difference exceeds 5℃, the liquid inlet valve and the liquid outlet valve are controlled to be opened at the same time; if the temperature difference does not exceed 5℃, the liquid inlet valve and the liquid outlet valve are controlled to be closed at the same time.

[0018] Further, the liquid cooling cavity is provided with a spoiler column, the spoiler column is located in the middle of the horizontal section of the liquid cooling cavity, the spoiler column has spoiler blades protruding towards the liquid inlet, the spoiler blades are a plurality of blades arranged at intervals, and the spoiler column also has a flow surface protruding towards the liquid outlet.

[0019] Further, the spoiler column is provided with a plurality of functional holes, the plurality of functional holes are arranged at intervals on the spoiler column in the height direction, and the functional holes are located between adjacent spoiler blades.

[0020] Further, the density of the plurality of functional holes arranged in the middle of the spoiler column in the height direction is higher than the density of the plurality of functional holes arranged at the two ends of the spoiler column in the height direction.

[0021] Further, the air guide plate is inclined downward from back to front, the shunt holes are arranged on the air guide plate, and the shunt holes arranged on adjacent air guide plates in the height direction are staggered.

[0022] Further, the shunt holes arranged on adjacent air guide plates in the height direction are staggered and have overlapping areas.

[0023] Further, the air outlet and the air return port are oppositely arranged in the extension direction of the heat dissipation fins, the middle part of the air outlet in the height direction is higher than the middle part of the air outlet in the height direction, and the middle part of the air outlet in the height direction is close to the heat dissipation surface.

[0024] The shunt holes arranged on the air guide plate are a plurality of shunt holes, the diameters of the plurality of shunt holes gradually decrease from front to back, and the distances between the adjacent through holes gradually increase from front to back.

[0025] The diameters of the plurality of air return ports gradually decrease from bottom to top.

[0026] Further, the heat dissipation fins are a plurality of fins, the plurality of heat dissipation fins are arranged in parallel along a set direction I, and the heights of the plurality of heat dissipation fins gradually increase from the middle to the two sides along the set direction I.

[0027] The ends of the plurality of heat dissipation fins gradually shrink inward from the two sides to the middle along the set direction I.

[0028] The distances between the plurality of heat dissipation fins gradually decrease from the middle to the two ends along the set direction I.

[0029] The utility model discloses a battery pack cooling structure for energy storage charging station, through the opening or closing of the set liquid inlet valve, the independent cooling of the specified battery pack is realized, is applicable to the series and parallel charging and discharging of the heterogeneous battery pack, the capacity difference of battery pack and the series and parallel charging and discharging of battery pack electric loss difference in energy storage charging station, the series and parallel combination of arbitrary battery pack in energy storage box, and the universality is strong, and the safety is good. BRIEF DESCRIPTION OF DRAWINGS

[0030] The utility model will be further described below in combination with the drawings and examples:

[0031] Figure 1 It is the structural schematic diagram of the utility model;

[0032] Figure 2 It is the main view structural schematic diagram of the utility model;

[0033] Figure 3 It is the side view structural schematic diagram of the utility model;

[0034] Figure 4 It is the structural schematic diagram of the liquid cooling cavity of the utility model;

[0035] Figure 5 It is the structural schematic diagram of the turbulence column of the utility model;

[0036] Figure 6 It is the structural schematic diagram of the radiating fin of the utility model;

[0037] Figure 7 It is the structural schematic diagram of the air guide plate of the utility model. DETAILED DESCRIPTION

[0038] Figure 1 It is the structural schematic diagram of the utility model; Figure 2 It is the main view structural schematic diagram of the utility model; Figure 3 It is the side view structural schematic diagram of the utility model; Figure 4 It is the structural schematic diagram of the liquid cooling cavity of the utility model;

[0039] Figure 5 It is the structural schematic diagram of the turbulence column of the utility model; Figure 6 It is the structural schematic diagram of the radiating fin of the utility model; Figure 7The utility model discloses a structure diagram of the air guide plate, and the adjacent split flow hole positions from top to bottom on the air guide plate are shown by solid lines and dotted lines. As shown in the figure, the battery pack cooling structure for the energy storage charging station in the embodiment comprises an air conditioning cooling system for adjusting the ambient temperature of the energy storage box of the energy storage charging station and a battery pack liquid cooling system for adjusting the battery pack 001 to be at a set use temperature.

[0040] The air conditioning cooling system and the battery pack liquid cooling system are any one of the prior art, and the corresponding functions are realized, and details are not repeated here.

[0041] Further comprising liquid cooling plate 1, liquid cooling plate 1 has liquid cooling cavity, liquid cooling cavity has liquid inlet 2 connected in battery pack liquid cooling system liquid supply end and liquid outlet 3 connected in battery pack liquid cooling system liquid return end;

[0042] Liquid cooling plate 1 is arranged at the top and / or bottom of multipurpose battery pack 001 in energy storage charging station, and the and / or meaning is that liquid cooling plate 1 can be independently arranged at the top or bottom of battery pack 001, or liquid cooling plate 1 is two and is arranged at the top and bottom of battery pack 001 respectively, and details are not repeated here.

[0043] More preferably, liquid cooling plate 1 is attached to battery pack 001, so that it can directly assist the cooling of battery pack 001 and improve the cooling efficiency of battery pack 001, this scheme only shows a group of energy storage charging battery packs stacked from top to bottom in the energy storage box, after battery pack 001 is connected in the energy storage box, the liquid cooling function of battery pack 001 and the air conditioning system are used for cooling, the liquid inlet and the liquid outlet of liquid cooling plate 1 are connected to the liquid inlet and the liquid outlet of battery pack 001, and the existing liquid cooling pipeline can be directly used to complete the secondary heat dissipation of battery pack 001, thereby increasing the heat dissipation efficiency of battery pack 001.

[0044] Wherein, liquid cooling cavity is formed in liquid cooling plate 1, and on the horizontal section, the size of liquid cooling plate 1 and the size of liquid cooling cavity are substantially consistent with the size of battery pack 001, so as to meet the high-efficiency heat dissipation demand of battery pack 001, and the horizontal section is a section perpendicular to the height direction, and details are not repeated here.

[0045] The liquid inlet 2 is provided with an inlet valve 4 controlled to open and close, the box body of the energy storage charging station is stacked with a plurality of groups of battery packs 001 along the height direction, a group of liquid cooling plates 1 is arranged on each group of battery packs 001, and the battery packs 001 are cooled twice by the liquid cooling plates 1, so that the battery packs 001 reach the preset use temperature; in the scheme, a group of liquid cooling plates 1 is arranged on the top of each group of battery packs 001.

[0046] Further comprising a temperature monitoring system and an information processing system, the temperature monitoring system is used to monitor the use temperature of each liquid cooling plate 1 and transmit the temperature information to the information processing system,

[0047] The information processing system is used to receive and process the temperature information and control the opening or closing of the specified liquid inlet valve 4 through the processing result; more specifically, the temperature monitoring system is also used to monitor the use temperature of each battery pack 001 and transmit the temperature information to the information processing system; if the information processing system receives the use temperature of the battery pack 001 and the use temperature of the corresponding liquid cooling plate 1 differs by more than 5℃, it controls the liquid inlet valve 4 of the corresponding liquid cooling plate 1 to open; if the information processing system receives the use temperature of the battery pack 001 and the use temperature of the corresponding liquid cooling plate 1 differs by not more than 5℃, it controls the liquid inlet valve 4 of the corresponding liquid cooling plate 1 to close. The temperature monitoring system includes temperature sensor I arranged on the battery pack 001 and temperature sensor II arranged on the corresponding liquid cooling plate 1, the information processing system uses the existing computer system to control the opening and closing of the corresponding battery pack 001 liquid cooling, and a set of temperature information fed back by the temperature sensor I and the temperature sensor II is compared and controlled by the information processing system to open or close the liquid inlet valve 4. Through the liquid inlet valve 4 controlled to open and close, according to the information fed back by the temperature monitoring system, the specified battery pack 001 can be accurately cooled, the temperature of each battery pack 001 can be controlled within the preset range, the overheating and scrap of the battery pack 001 caused by the inconsistent cooling efficiency of the battery pack 001 in the energy storage box can be reduced, and the safety of the energy storage box can be improved. Through the arrangement of the battery pack cooling structure, the temperature monitoring system and the information processing system, independent cooling of the specified battery pack 001 is realized by opening or closing the specified liquid inlet valve 4, which is suitable for series and parallel charging and discharging of heterogeneous battery packs 001, capacity differences and electrical loss differences of the battery packs 001 in the energy storage and charging station, and series and parallel combination of any battery pack 001 in the energy storage box. It is strong in universality and good in safety, can make the battery charging and discharging in the energy storage box in an ideal temperature charging and discharging environment, improve the reuse performance of waste batteries, and control the cost of recycling retired power batteries for vehicles.

[0048] In this embodiment, the liquid outlet 3 is provided with a controlled opening and closing liquid outlet valve 5, each liquid cooling plate 1 has a corresponding liquid inlet valve 4 and liquid outlet valve 5, and the liquid outlet valve 5 is controlled to open or close at the same time as the liquid inlet valve 4. Through the arrangement of the liquid outlet valve 5, the use of each liquid cooling plate 1 can be independent, and when other liquid cooling plates 1 are returned to liquid, they will not exchange heat with the non-working liquid cooling plates 1, which can ensure that the charging and discharging of other battery packs 001 is in an ideal environment.

[0049] In this embodiment, the liquid cooling cavity is provided with a turbulence column 6, which is located in the middle of the horizontal section of the liquid cooling cavity, that is, near the center of the horizontal section of the liquid cooling cavity. The heat dissipation range of this position can be more wide and uniform, and the heat can be removed in time, thereby improving the heat dissipation efficiency of the battery pack 001. The purpose of arranging the turbulence column 6 is also to increase the residence time of the cooling liquid in the specified position in the liquid cooling cavity, so as to improve the cooling efficiency of the battery pack 001 and make the cooling of the battery pack 001 more efficient.

[0050] In this scheme, the top end of the turbulence column 6 in the height direction is connected to the top of the inner wall of the liquid cooling cavity, and the bottom end of the turbulence column 6 in the height direction is connected to the bottom of the inner wall of the liquid cooling cavity. On the one hand, the structural strength of the liquid cooling plate 1 itself is increased, which can provide a good structural framework. On the other hand, it has a large area of flow resistance effect, and the heat dissipation effect is more optimal.

[0051] The turbulence column 6 has turbulence fins 7 protruding towards the liquid inlet, and the turbulence fins 7 are arranged in several pieces. The turbulence column 6 also has a flow surface 8 protruding towards the liquid outlet. The purpose of arranging the flow surface 8 is to reduce the collection of cooling liquid at the liquid outlet of the liquid cooling cavity, which is more conducive to quickly discharging the relatively high-temperature cooling liquid from the liquid cooling cavity, thereby improving the heat dissipation efficiency. The flow surface 8 is continuous and protrudes towards the liquid outlet in a curved surface. The center of the curved surface is opposite the center of the liquid outlet, so that the cooling liquid is uniformly discharged. As shown in Figure 4 The connection line of the liquid inlet and the liquid outlet of the liquid cooling cavity is parallel to the length direction of the energy storage box. The liquid inlet is on the right side of the liquid cooling plate 1, and the liquid outlet is on the left side of the liquid cooling plate 1. Each of the several groups of liquid cooling plates 1 has a corresponding liquid inlet and liquid outlet, which are respectively arranged in the vertical column of the battery pack 001 bracket through the liquid supply pipeline, so as to save cost and space.

[0052] The turbulence column 6 is supported in the liquid cooling cavity in a substantially columnar shape. The flow surface 8 is the left end surface of the turbulence column 6 in the liquid inlet direction, and the turbulence fins 7 are formed on the right end surface of the turbulence column 6. The specific structure of the turbulence column 6 enables the cooling liquid to collect between the turbulence fins 7. Exchange holes are arranged on the turbulence fins 7. According to the characteristics that the cooling liquid has initial kinetic energy and continuously enters the liquid cooling cavity, and in combination with the turbulence fins 7 arranged in a "mountain" shape, the relatively high-temperature cooling liquid is diffused to both ends of the turbulence column 6 in the width direction in time. In combination with the arrangement of the flow surface 8, there is no liquid accumulation at the back of the turbulence column 6. The relatively high-temperature cooling liquid in the liquid cooling cavity can be discharged more quickly through the liquid outlet, so that the cooling effect of the liquid cooling plate 1 is more optimal, which is more conducive to ensuring the heat dissipation of the battery pack 001 and improving the safety of the energy storage box of the charging station.

[0053] In this embodiment, the spoiler column 6 is provided with functional holes 9, the functional holes 9 are a plurality of, a plurality of functional holes 9 are distributed on the spoiler column 6 in the height direction, and the functional holes 9 are located between adjacent spoiler pieces 7; the purpose of setting the functional hole 9 is to provide a diffusion branch for the cooling liquid passing through the spoiler column 6, so that part of the cooling liquid is directly discharged to the back of the spoiler column 6, combined with the curved flow surface 8, the flow efficiency of the relatively high temperature cooling liquid in the liquid cooling chamber can be improved, that is, to ensure that the relatively low temperature cooling liquid is efficiently gathered at the position of the spoiler column 6, and the relatively high temperature cooling liquid is efficiently discharged, on the one hand, to prevent the relatively low temperature cooling liquid from flowing away, so that the cooling capacity of the liquid cooling plate 1 is improved, on the other hand, to improve the discharge efficiency of the relatively high temperature cooling liquid, reduce the local heat concentration of the liquid cooling plate 1, so that the temperature of the cooling liquid inside the liquid cooling plate 1 is always kept within the set range, and the overall cooling efficiency of the liquid cooling plate 1 is higher.

[0054] In this embodiment, the density of the plurality of functional holes 9 distributed in the height direction of the spoiler column 6 is higher than the density of the functional holes 9 distributed at both ends of the height direction of the spoiler column 6; so that the flow amount of the spoiler column 6 in the middle part is greater than that of the upper and lower ends, and the liquid flow in the liquid cooling chamber has a structure that the flow rate in the middle part is greater than that in the end part, and the heat exchange effect is better; further, the hole diameter size of the functional hole 9 is smaller than the hole diameter size of the middle exchange hole, so as to ensure that the cooling liquid can be gathered at the position of the spoiler column 6, and the cooling effect is controlled, which will not be described here.

[0055] In this embodiment, it also includes a supply air duct 10 connected to the air outlet end of the air conditioning cooling system and a return air duct 11 connected to the air return end of the air conditioning cooling system; the supply air duct 10 has an air outlet 12, and the return air duct 11 has an air return 13; in this scheme, the gas flow direction is parallel to the width direction of the energy storage tank, the gas flow direction along the supply air duct 10, the air outlet 12 is behind, and the air return 13 is in front;

[0056] The liquid cooling plate 1 also has opposite conduction surfaces and heat dissipation surfaces, the conduction surfaces are attached to the top surface or bottom surface of the battery pack 001, and the heat dissipation surfaces are provided with heat dissipation fins 14; so that the heat of the battery pack 001 can not only be taken away by its own liquid cooling system, but also be taken away by the liquid cooling plate 1, improve the heat dissipation efficiency of the battery pack 001, and reduce the difference in service life of the battery pack 001 caused by uneven heat dissipation;

[0057] The heat dissipation fins 14 are arranged between the air outlet 12 and the air return 13, the air flow path passes through the heat dissipation fins 14, and the heat of the corresponding battery pack 001 is directly taken away, and the air return 13 also has a certain negative pressure, so that the cooling air is guided and forced to pass through the heat dissipation fins 14, accelerating the cooling efficiency of the battery pack; when the battery pack 001 is assembled in the energy storage box, each group of battery packs 001 is equipped with the liquid cooling plate 1 of the scheme and the corresponding air outlet 12 and air return 13, and the air outlet and the air return rely on the original air conditioning cooling system in the energy storage box. Compared with the original air conditioning cooling system in the energy storage box, the scheme can directly apply the cooling air to the reused battery pack 001, reduce the cooling differentiation of the battery pack 001 at different positions, accelerate the heat dissipation efficiency of the battery pack 001, increase the heat dissipation efficiency of the battery pack 001, control the temperature of the battery pack 001 within a predetermined range, reduce the battery pack 001 overheating scrap caused by inconsistent heat dissipation efficiency of the battery pack 001 in the energy storage box, and improve the safety of the energy storage box. The temperature of the whole box is controlled within the set range, and the heat dissipation of each battery pack 001 can be considered, so that the battery charging and discharging in the energy storage box can be in an ideal temperature charging and discharging environment, improve the performance of the waste battery, ensure the service life of the waste battery, and improve the quality of the energy storage box.

[0058] In the embodiment, the middle part of the air outlet 12 in the height direction is higher than the middle part of the air outlet 12 in the height direction, and the air outlet 12 and the air return 13 are oppositely arranged in the extension direction of the heat dissipation fins 14. By oppositely arranging the air outlet 12 and the air return 13 and arranging them close to the extension direction of the heat dissipation fins 14, the flow rate of the cooling air can be accelerated, the heat dissipation efficiency of the battery pack 001 can be improved, and the temperature of the environment in which the battery pack 001 is located can be maintained within a suitable range. The purpose of the height difference between the air outlet 12 and the air return 13 is to make the cooling air flow direction of the heat dissipation fins 14 inclined from top to bottom, further satisfy the function of efficient air cooling, and improve the service life of the battery pack 001.

[0059] In the embodiment, the direction of the cooling liquid flowing in the liquid cooling cavity intersects the extension direction of the heat dissipation fins 14. The external environment cooling and the internal liquid cooling are crossed to avoid cold and hot zones, the two are perpendicular in the scheme, the effectiveness of heat dissipation is improved, the battery pack 001 is quickly cooled, the efficient heat dissipation of the liquid cooling plate 1 to the battery pack 001 is satisfied, the safety of the battery pack 001 in the energy storage box is ensured, and the use safety of the energy storage box is improved.

[0060] In this embodiment, the air supply pipeline 10 extends in the height direction, the air supply pipeline 10 is arranged at the rear side of the end of the liquid cooling plate 1, and the air supply pipeline 10 is provided with an air guide plate 15 for guiding gas to the air outlet 12. The air guide plate 15 is arranged to actively guide cooling air to the corresponding air outlet 12, to control the flow of cooling air to each group of liquid cooling plates 1 as much as possible, to meet the heat dissipation consistency of each battery pack 001 as much as possible, to meet the cooling consistency of each position of the energy storage box, to reduce the temperature difference between the upper and lower positions in the energy storage box, to enable the battery in the energy storage box to be in an ideal temperature charging and discharging environment, to improve the performance of the waste battery reuse, and to improve the quality of the energy storage box. The air guide plate 15 is provided with a shunt hole 16, or the air guide plate 15 and the inner wall of the air supply pipeline 10 form a shunt hole 16, so that the cooling air can pass through the corresponding air outlet 12 and diffuse to the corresponding air return port 13 through each group of battery packs 001.

[0061] The number of air outlets 12 of the air supply pipeline 10 is consistent with the number of liquid cooling plates 1, and the air outlets 12 are arranged at the rear end of the liquid cooling plates 1 in a one-to-one correspondence. The number of air guide plates 15 is consistent with the number of air outlets 12, and the air guide plates 15 are arranged at the rear end of the air outlets 12 in a one-to-one correspondence with the air outlets 12.

[0062] The air return pipeline 11 extends in the height direction, the air return pipeline 11 is arranged at the front side of the front end of the liquid cooling plate 1, the number of air return ports 13 of the air return pipeline 11 is consistent with the number of liquid cooling plates 1, and the air return ports 13 are arranged at the front end of the liquid cooling plates 1 in a one-to-one correspondence. The front and back correspond to the front and back of the width direction of the energy storage box, the air return direction is forward, and the air supply direction is backward.

[0063] In this embodiment, the air guide plate 15 is inclined downward from back to front, the shunt hole 16 is arranged on the air guide plate 15, and the inclined air guide plate 15 can further improve the initial kinetic energy of the cooling air entering the heat dissipation fin 14. The shunt hole 16 is staggered to ensure that the cooling air entering the next level is stored and then has the initial kinetic energy to blow to the battery pack 001, and then diffuses downward step by step. The air guide plate 15 at the bottom can not be provided with a shunt hole 16 to guide air to the corresponding battery group for cooling.

[0064] In this embodiment, the diversion holes 16 on adjacent air-guiding plates 15 in the height direction are staggered; the diversion holes 16 on adjacent air-guiding plates 15 in the height direction have an overlap area 17; the top-down blowing method can obtain greater initial kinetic energy, which is beneficial for heat dissipation of battery pack 001. The setting of the overlap area 17 can make the cooling air flowing in the height direction have sufficient air pressure, and the cooling air sent to the heat dissipation fins 14 also has a certain air pressure under the setting of the air-guiding plates 15, thereby achieving the purpose of autonomous air supply and return for each layer of battery pack.

[0065] In this embodiment, the air outlet 12 and the return air outlet 13 are arranged opposite to each other in the extending direction of the heat dissipation fins 14. The middle part of the air outlet 12 in the height direction is higher than the middle part of the air outlet 12 in the height direction, and the middle part of the air outlet 12 in the height direction is close to the heat dissipation surface.

[0066] The air intake plate 15 has several diversion holes 16, the diameter of which gradually decreases from front to back, and the spacing between adjacent holes gradually increases from front to back. The closer the diversion holes 16 are to the air outlet 12, the smaller their size and the farther apart they are, resulting in greater kinetic energy of the airflow and ensuring the cooling capacity of the heat dissipation fins 14. Furthermore, in this design, if... Figure 7 As shown, it illustrates the positions of the diversion holes 16 on the two air intake plates 15 from top to bottom. The two air intake plates 15 are stacked together, and then the stacking is repeated downwards. An overlap area 17 is always reserved in the middle so that the airflow from top to bottom passes through each layer of air intake plates 15, ensuring consistent cooling of each layer of battery pack as much as possible.

[0067] The aperture size of several of the return air vents 13 gradually decreases from bottom to top; the arrangement of the return air vents 13 can actively draw in and return air, improve the heat dissipation efficiency of the battery pack, and the size becomes smaller as it goes up, which can make up for the controllable temperature difference caused by insufficient output pressure of the bottom air outlet 12, further ensuring the ambient temperature inside the energy storage box, as well as ensuring the operating temperature of each battery pack 001.

[0068] In this embodiment, as Figure 2 As shown, the air supply duct 10 is roughly located in the middle of the horizontal direction of the battery pack 001. The return air duct 11 consists of two symmetrically arranged at both ends of the air supply duct 10, which provides good return air consistency and can assist the heat dissipation fins 14 in better cooling. The air supply duct 10 is located on the rear side of the battery pack 001, and the return air duct 11 is located on the front side of the battery pack 001. The return air duct 11 can replace the current support column of the battery pack 001 bracket to save costs and space. The arrangement of the two sets of return air ducts 11 is more conducive to the heat dissipation of the battery pack 001, and the heat dissipation of the battery pack 001 is good, which can ensure the ambient temperature inside the energy storage box and the operating temperature of a single battery pack 001.

[0069] In the embodiment, the heat dissipation fins 14 are arranged in parallel along the set direction I, and the height of the heat dissipation fins 14 gradually increases from the middle to both sides along the set direction I;

[0070] As shown in Figure 2 and Figure 6 , the set direction is the length direction of the energy storage box, the heat dissipation fins 14 extend along the depth direction of the battery pack 001 and are arranged in parallel along the transverse direction of the battery pack 001, and the cross section of the heat dissipation fins 14 in the height direction approximately forms a wind passage with a concave middle portion; the air outlet 12 directly faces the front end of the heat dissipation fins 14 in the transverse direction, and the top edge connecting line of the heat dissipation fins 14 is an arc with a concave middle portion and symmetrical sides, which can provide a favorable and fast wind passage under air cooling conditions and quickly take away the heat of the heat dissipation fins 14 under wind pressure, thereby improving the heat dissipation capacity of the liquid cooling plate 1.

[0071] In the embodiment, the ends of the heat dissipation fins 14 along the set direction I gradually shrink inward from both sides to the middle; that is, the length of the heat dissipation fins 14 gradually increases from the middle to both sides, and the cross section of the heat dissipation fins 14 in the horizontal direction approximately forms a buffer zone with a concave front end; the buffer zone faces the air outlet 12, and the spacing of the heat dissipation fins 14 gradually decreases from the middle to both ends along the set direction I, so as to form a structure with better heat dissipation capacity in cooperation with the wind passage; the buffer zone of the present scheme directly faces the air outlet 12, and the front end connecting line of the heat dissipation fins 14 is an arc with a concave middle portion and symmetrical sides, which can stabilize the wind pressure of the heat dissipation fins 14 and reduce direct blowing noise, while meeting the cooling demand of the battery pack 001.

[0072] The heat dissipation fins 14 with the specific structure and specific distribution cooperate with the air outlet 12 and the air return port 13 with the specific structure, so that the air flow speed in the middle of the battery pack 001 is greater, the internal pressure in the transverse middle of the battery pack 001 is lower, the cooling efficiency of the battery pack 001 is higher under the conditions of negative pressure on both sides of the front end and positive pressure on the rear end, and the structure with the air outlet 12 on top and the air return port 13 on the bottom can further improve the cooling efficiency of the battery pack 001.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A battery pack cooling configuration for an energy storage charging station, characterized by: The liquid cooling plate comprises a liquid cooling cavity, an inlet of the liquid cooling cavity is communicated with a liquid supply end of a battery pack liquid cooling system, and an outlet of the liquid cooling cavity is communicated with a liquid return end of the battery pack liquid cooling system; The inlet of the liquid cooling cavity is provided with an inlet valve which is controlled to be opened and closed, and the outlet of the liquid cooling cavity is provided with an outlet valve which is controlled to be opened and closed, each liquid cooling plate has a corresponding group of inlet valves and outlet valves, and the outlet valve and the inlet valve are controlled to be opened or closed at the same time. The liquid cooling plate further comprises opposite conduction surfaces and heat dissipation surfaces, the conduction surfaces are attached to the top surface of the battery pack, and the heat dissipation surfaces are provided with heat dissipation fins. The air supply pipeline is communicated with an air outlet of an air conditioner cooling system, and the air return pipeline is communicated with an air return inlet of the air conditioner cooling system. The air supply pipeline has an air outlet, the air return pipeline has an air return inlet, and the air outlet and the air return inlet are oppositely arranged in the extension direction of the heat dissipation fins. The direction of the cooling liquid flowing in the liquid cooling cavity is crossed with the extension direction of the heat dissipation fins.

2. The battery pack cooling configuration for an energy storage charging station of claim 1, wherein: The box body of the energy storage charging station is stacked with a plurality of groups of battery packs in the height direction, and a corresponding group of liquid cooling plates is arranged on each group of battery packs. The air supply pipeline extends in the height direction, the air supply pipeline is arranged at the rear side of the end of the liquid cooling plate, the air supply pipeline is provided with an air guide plate for guiding gas to the air outlet, and the air guide plate is provided with a shunt hole or the shunt hole is formed between the air guide plate and the inner wall of the air supply pipeline. The number of air outlets of the air supply pipeline is consistent with the number of liquid cooling plates, the air outlets are arranged at the rear end of the liquid cooling plates in a one-to-one correspondence, the number of air guide plates is consistent with the number of air outlets, and the air guide plates are arranged at the rear end of the air outlets in a one-to-one correspondence. The air return pipeline extends in the height direction, the air return pipeline is arranged at the front side of the front end of the liquid cooling plate, the number of air return inlets of the air return pipeline is consistent with the number of liquid cooling plates, and the air return inlets are arranged at the front end of the liquid cooling plates in a one-to-one correspondence.

3. The battery pack cooling configuration for an energy storage charging station of claim 1, wherein: The battery pack and the liquid cooling plate have a temperature difference, if the temperature difference exceeds 5℃, the inlet valve and the outlet valve are controlled to be opened at the same time. If the temperature difference does not exceed 5℃, the inlet valve and the outlet valve are controlled to be closed at the same time.

4. The battery pack cooling configuration for an energy storage charging station of claim 1, wherein: The liquid cooling cavity is provided with a turbulence column, the turbulence column is located in the middle of the horizontal section of the liquid cooling cavity, the turbulence column has a turbulence piece protruding towards the inlet, the turbulence piece is a plurality of pieces arranged at intervals, and the turbulence column further has a flow surface protruding towards the outlet.

5. The battery pack cooling configuration for an energy storage charging station of claim 4, wherein: The turbulence column is provided with a plurality of function holes, the function holes are arranged at intervals in the height direction on the turbulence column, and the function holes are located between adjacent turbulence pieces.

6. The battery pack cooling configuration for an energy storage charging station of claim 5, wherein: The density of the plurality of function holes distributed in the middle of the height direction of the turbulence column is higher than the density of the plurality of function holes distributed at the two ends of the height direction of the turbulence column.

7. The battery pack cooling configuration for an energy storage charging station of claim 2, wherein: The air guide plate is inclined downward from back to front, the shunt hole is arranged on the air guide plate, and the shunt holes arranged on adjacent air guide plates in the height direction are staggered.

8. The battery pack cooling configuration for an energy storage charging station of claim 7, wherein: The shunt holes arranged on adjacent air guide plates in the height direction are staggered and have an overlapping area.

9. The battery pack cooling configuration for an energy storage charging station of claim 7, wherein: The air outlet and the air return are oppositely arranged in the extension direction of the heat dissipation fins, the middle part of the air outlet in the height direction is higher than the middle part of the air outlet in the height direction, and the middle part of the air outlet in the height direction is close to the heat dissipation surface; The plurality of shunt holes are gradually reduced in size from front to back, and gradually increased in distance from front to back. The plurality of air return holes are gradually reduced in size from bottom to top.

10. The battery pack cooling configuration for an energy storage charging station of claim 1, wherein: The plurality of heat dissipation fins are arranged in parallel along the set direction I, and the height of the plurality of heat dissipation fins gradually increases from the middle to the two sides along the set direction I. The end of the plurality of heat dissipation fins gradually contracts inward from the two sides to the middle along the set direction I. The distance between the plurality of heat dissipation fins gradually decreases from the middle to the two ends along the set direction I.

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