CN219716981U - Liquid cooling energy storage system - Google Patents
Liquid cooling energy storage system Download PDFInfo
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- CN219716981U CN219716981U CN202320581846.3U CN202320581846U CN219716981U CN 219716981 U CN219716981 U CN 219716981U CN 202320581846 U CN202320581846 U CN 202320581846U CN 219716981 U CN219716981 U CN 219716981U
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- 239000007788 liquid Substances 0.000 title claims abstract description 157
- 238000001816 cooling Methods 0.000 title claims abstract description 48
- 238000004146 energy storage Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 215
- 239000000110 cooling liquid Substances 0.000 claims abstract description 63
- 238000010992 reflux Methods 0.000 claims abstract description 45
- 239000012530 fluid Substances 0.000 claims abstract description 36
- 239000012782 phase change material Substances 0.000 claims abstract description 10
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 6
- 239000002826 coolant Substances 0.000 description 5
- 238000007726 management method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 208000035475 disorder Diseases 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
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- 238000009834 vaporization Methods 0.000 description 1
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Abstract
The utility model relates to a liquid cooling energy storage system, which comprises: at least one battery cluster including a plurality of battery packs; the water tank is used for accommodating cooling liquid; the hydraulic pump is used for extracting the cooling liquid in the water tank and sending the extracted cooling liquid to the water inlet pipe network; the water inlet pipe network is used for distributing cooling liquid to the liquid cooling plates of each battery pack in the battery cluster; the water return pipe network is used for conveying the reflux fluid of each battery pack liquid cooling plate to the gas-liquid separator; the gas-liquid separator is used for separating reflux gas and reflux liquid in the reflux fluid and returning the reflux liquid to the water tank; and the condenser is used for condensing the reflux gas and conveying the condensed liquid back to the water tank so as to enable the cooling liquid to circularly reciprocate in the liquid cooling energy storage system, and the cooling liquid is made of a phase change material. The utility model can improve the heat dissipation effect of the cooling liquid, reduce the pressure fluctuation of the pipeline, improve the stability of the flow of the reflux fluid, relax the constraint of the liquid cooling pipeline design and improve the universality of the pipeline design.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a liquid cooling energy storage system.
Background
At present, a water supply pipe network and a water return pipe network are generally arranged in the liquid cooling energy storage equipment, so that cooling liquid circularly flows in each pipe network, and the purpose of radiating heat of the energy storage equipment is achieved. Because a plurality of battery clusters exist in the energy storage equipment, each water supply pipe network and each water return pipe network adopt the battery clusters as units to conduct heat dissipation design, and in order to ensure that indexes such as temperature rise and temperature difference of each battery core in different battery clusters meet actual demands, the flow of cooling liquid distributed to each battery cluster needs to be ensured to be kept within a certain deviation range.
In the prior art, ethylene glycol with the mass percent of 50% and purified water with the mass percent of 50% are mainly adopted as cooling media of the liquid cooling energy storage device, but the cooling media have limited heat exchange capacity, and the performance of the energy storage device, such as the storage electric quantity, the charge-discharge multiplying power and the like of the energy storage device, can be further influenced due to the defect of the heat exchange capacity.
In addition, in order to control the flow rate of each branch pipe, two general modes are adopted: the flow of each branch pipe is independently controlled by adopting a valve, but the method has high cost and is complex to control the valve; secondly, the inner diameter of the pipeline is optimized, and the method has the defects that the single cluster structure is complex, the shapes of the flow distribution control parts in the single cluster structure are consistent, and only the inner dimensions are different, so that the parts need to be custom developed and installed strictly in sequence. Although the parts are simulated by adopting means such as computational fluid dynamics (Computational Fluid Dynamics, CFD) and the like, in order to meet the requirements of the flow deviation values of all branch pipes, the size difference of the parts is only about 1mm, and the potential risk of installation errors exists.
Disclosure of Invention
In view of this, the utility model provides a liquid cooling energy storage system, which can make the heat transfer of the cooling liquid more effective, further make the cooling liquid of the utility model take away more heat than the common cooling liquid under the same flow, improve the heat dissipation effect of the cooling liquid, widen the flow deviation range of the cooling liquid, relax the constraint of liquid cooling pipeline design, and can perform gas-liquid separation on the reflux fluid, reduce the pressure fluctuation in the pipeline, and promote the stability of the flow of the reflux fluid. On the basis, the allowable error range of the pipeline and joint design is correspondingly increased, the risk of pipeline installation errors is reduced, and the universality of the pipeline design is improved.
In a first aspect, embodiments of the present utility model provide a liquid-cooled energy storage system, the liquid-cooled energy storage system comprising: at least one battery cluster including a plurality of battery packs arranged in a row and column form; the water tank is arranged on the side face of the battery cluster and is used for containing cooling liquid; the hydraulic pump is connected with the water tank and is used for extracting the cooling liquid in the water tank and conveying the extracted cooling liquid to a water inlet pipe network; the water inlet pipe network is connected with the hydraulic pump and is used for distributing the cooling liquid extracted by the hydraulic pump to the liquid cooling plates of each battery pack in the battery cluster; the water return pipe network is connected with the liquid cooling plates and is used for conveying the reflux fluid of each battery pack liquid cooling plate to the gas-liquid separator; the gas-liquid separator is connected with the water return pipe network and is used for separating the reflux gas and the reflux liquid in the reflux fluid and returning the reflux liquid to the water tank; the condenser is arranged between the water tank and the gas-liquid separator and is used for condensing the reflux gas and conveying condensed liquid after condensation back to the water tank so that the cooling liquid circularly reciprocates in the liquid cooling energy storage system, and the cooling liquid is made of a phase change material.
In an embodiment, the water inlet pipe network comprises a multi-stage cascade water inlet pipe, the multi-stage cascade water inlet pipe is composed of a first-stage water inlet pipe, a second-stage water inlet pipe and a third-stage water inlet pipe, wherein the first-stage water inlet pipe is connected with the hydraulic pump, the second-stage water inlet pipe is connected with the first-stage water inlet pipe and the third-stage water inlet pipe respectively, and the third-stage water inlet pipe is arranged on the side face of the corresponding battery pack.
In an embodiment, the first stage water inlet pipe is parallel to a part of the third stage water inlet pipe, and the second stage water inlet pipe is perpendicular to the first stage water inlet pipe and the third stage water inlet pipe, respectively.
In an embodiment, the third stage water inlet pipe is provided with a reducing component, and the diameter of the reducing component changes along the direction towards the corresponding battery pack.
In an embodiment, the first stage inlet pipe is provided with a one-way valve, and the one-way valve is used for controlling the flow direction of the cooling liquid flowing into the first stage inlet pipe.
In an embodiment, the water return pipe network comprises a multi-stage cascade water return pipeline, the multi-stage cascade water return pipeline is composed of a first-stage water return pipeline, a second-stage water return pipeline and a third-stage water return pipeline, wherein the first-stage water return pipeline is connected with the gas-liquid separator, the second-stage water return pipeline is respectively connected with the first-stage water return pipeline and the third-stage water return pipeline, and the third-stage water return pipeline is arranged on the side surface of the corresponding battery pack.
In an embodiment, the first-stage water return pipeline is parallel to a part of the third-stage water return pipeline, and the second-stage water return pipeline is perpendicular to the first-stage water return pipeline and the third-stage water return pipeline respectively.
In an embodiment, the liquid cooling energy storage system further comprises an air pump, the air pump is connected with the gas-liquid separator and the condenser respectively, and the air pump is used for pumping the reflux gas conveyed by the gas-liquid separator into the condenser.
In an embodiment, a solenoid valve is provided in the gas-liquid separator for controlling a flow rate of the reflux liquid in the gas-liquid separator discharged into the water tank.
In one embodiment, the gas-liquid separator is provided with a plurality of baffles and a cover plate, and the baffles respectively intersect with the cover plate to form a serpentine backflow fluid channel.
According to the utility model, the heat transfer of the cooling liquid can be more effective by adopting the cooling liquid made of the phase-change material to circularly reciprocate in the water tank, the water inlet pipe network and the water return pipe network, so that the cooling liquid can take away more heat under the same flow compared with the common cooling liquid, the heat dissipation effect of the cooling liquid is improved, the flow deviation range of the cooling liquid is widened, and the constraint of liquid cooling pipeline design is relaxed. In addition, through setting up gas-liquid separator and condenser, can carry out gas-liquid separation to the backward flow fluid, reduce the pressure fluctuation in the pipeline, promote the stability of backward flow fluid flow. On the basis, the allowable error range of the pipeline and joint design is correspondingly increased, the risk of pipeline installation errors is reduced, and the universality of the pipeline design is improved.
Drawings
The technical solution and other advantageous effects of the present utility model will be made apparent by the following detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings.
FIG. 1 illustrates a block diagram of a liquid-cooled energy storage system according to an embodiment of the utility model.
Fig. 2 shows a schematic diagram of a liquid-cooled energy storage system piping arrangement according to an embodiment of the utility model.
Fig. 3 shows a schematic diagram of the structure of a gas-liquid separator according to an embodiment of the present utility model.
Fig. 4 shows a schematic cross-sectional view of a gas-liquid separator according to an embodiment of the utility model.
Fig. 5 shows a schematic structural diagram of a cover plate according to an embodiment of the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. 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 fall within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element 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 the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
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 connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements or interaction relationship between the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials. In some instances, well known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present utility model.
FIG. 1 illustrates a block diagram of a liquid-cooled energy storage system according to an embodiment of the utility model. As shown in fig. 1, the liquid-cooled energy storage system may include a water tank 2, a hydraulic pump 3, a water inlet pipe network 4, a water return pipe network 5, a gas-liquid separator 6, a condenser 7, and at least one battery cluster. For example, in fig. 1, two battery clusters, namely, a battery cluster 11 and a battery cluster 12, are provided. Each of the battery clusters may include a plurality of battery packs arranged in a row and column, each of the battery packs may include a plurality of battery modules, and each of the battery modules may include a plurality of battery cells. The side of the battery cell can be provided with a liquid cooling plate. The liquid cooling plates in the battery cluster 11 can be communicated with the liquid cooling plates in the battery cluster 12 through liquid cooling pipelines.
In an embodiment, a closed battery compartment is disposed in the liquid-cooled energy storage system, and the plurality of battery packs may be arranged in a determinant in a three-dimensional space in the battery compartment. For example, the plurality of battery packs may be sequentially arranged in layers on a storage rack of the battery packs. The battery clusters where different battery packs are located can be arranged at intervals, and the different battery clusters can be arranged in a three-dimensional space in a row-column mode. It is understood that the present utility model is not limited to the arrangement of the battery packs inside the battery pack and the arrangement of the finer battery modules and the battery cells.
In an embodiment, the water tank 2 is disposed at a side of the battery pack, and the water tank 2 is used for containing a cooling liquid. The cooling liquid in the water tank 2 is in a liquid state. Specifically, the water tank 2 may be disposed in an equipment compartment of the liquid cooling energy storage system, where the equipment compartment is used for accommodating various relevant devices of the liquid cooling energy storage system, and the specific position of the water tank is not limited in the present utility model. The water tank 2 may be a barrel-shaped structure, and the barrel-shaped structure may be provided with a liquid outlet and a liquid inlet, the liquid outlet of the barrel-shaped structure may enable the hydraulic pump 3 to pump cooling liquid from the water tank 2, and the liquid inlet of the barrel-shaped structure may be used for enabling reflux liquid separated from the gas-liquid separator 6 and condensed liquid condensed by the condenser 7 to reflux into the water tank 2. The liquid outlet and liquid inlet on the water tank 2 can be provided with a plurality of.
In an embodiment, a hydraulic pump 3 may be connected to the water tank 2, and the hydraulic pump 3 is configured to pump the coolant in the water tank 2 and deliver the pumped coolant to the water inlet network 4. The hydraulic pump 3 may be driven based on an electric motor or an engine. In practical applications, the hydraulic pump 3 may be a variable displacement pump or a fixed displacement pump. The output flow of the variable pump can be adjusted according to the requirement, and the output flow of the constant delivery pump is constant.
In an embodiment, the water inlet pipe network 4 is connected with the hydraulic pump 3, and the water inlet pipe network 4 is used for distributing the cooling liquid pumped by the hydraulic pump 3 to the liquid cooling plates of each battery pack in the battery cluster; the water return pipe network 5 is connected with the liquid cooling plates, and the water return pipe network 5 is used for conveying the reflux fluid of each battery pack liquid cooling plate to the gas-liquid separator 6.
Wherein, the return fluid can include a return gas and a return liquid, and the return fluid can be a mixed form of the return gas and the return liquid. When the cooling liquid flows through the liquid cooling plates of the battery packs, the cooling liquid absorbs heat from the battery cells in the battery packs, and the cooling liquid is made of a phase change material, so that the cooling liquid can be converted from liquid state to gas state, and more heat is taken away compared with the traditional cooling liquid.
In one embodiment, the gas-liquid separator 6 is connected to the water return pipe network 5, and the gas-liquid separator 6 is used for separating the return gas and the return liquid in the return fluid and returning the return liquid to the water tank 2. The gas-liquid separator 6 may be provided in plurality, and each battery cluster may be provided with one gas-liquid separator 6. Because the temperature of the battery packs varies from battery cluster to battery cluster, the amount of heat absorbed by the coolant flowing through the different battery packs varies, resulting in a variation in the specific form of the return fluid corresponding to the different battery clusters. Through being provided with a gas-liquid separator at every battery cluster correspondence, can adjust the temperature difference of different battery clusters, promote the temperature equilibrium of liquid cooling energy storage system to promote the heat dispersion of liquid cooling energy storage system.
In an embodiment, the condenser 7 is disposed between the water tank and the gas-liquid separator, and the condenser 7 is connected to the water tank 2 and the gas-liquid separator 6, respectively. The condenser 7 is used for condensing the reflux gas and conveying the condensed liquid back to the water tank 2 so as to enable the cooling liquid to circularly reciprocate in the liquid cooling energy storage system.
Fig. 2 shows a schematic diagram of a liquid-cooled energy storage system piping arrangement according to an embodiment of the utility model. Referring to fig. 2, the water inlet pipe network 4 includes a multi-stage cascade water inlet pipe. For example, in fig. 2, the multi-stage cascade water intake pipe may be composed of a first stage water intake pipe 41, a second stage water intake pipe 42, and a third stage water intake pipe 43, the first stage water intake pipe 41, the second stage water intake pipe 42, and the third stage water intake pipe 43 being disposed on the battery cluster 11.
Referring to fig. 2, the first stage water intake pipe 41 is connected to the hydraulic pump 3, the second stage water intake pipe 42 is connected to the first stage water intake pipe 41 and the third stage water intake pipe 43, respectively, and the third stage water intake pipe 43 is disposed at a side of the corresponding battery pack. The first stage water inlet pipe 41, the second stage water inlet pipe 42 and the third stage water inlet pipe 43 are sequentially arranged to form a cooling liquid distribution network for distributing the cooling liquid output by the hydraulic pump 3 to the battery pack liquid cooling plate. By distributing the cooling liquid output by the hydraulic pump to the liquid cooling plates of the battery pack step by step, the embodiment of the utility model can adaptively adjust the distribution path of the cooling liquid according to the structure setting of the battery pack, thereby improving the distribution efficiency of the cooling liquid.
In an embodiment, as shown in fig. 2, the first stage water inlet pipe 41 is disposed parallel to a part of the third stage water inlet pipe 43, and the second stage water inlet pipe 42 is disposed perpendicular to the first stage water inlet pipe 41 and the third stage water inlet pipe 43, respectively. It is noted that in the present utility model, the second stage water intake pipe 42 may be provided in plurality. For example, in the position corresponding to the battery cluster 11 in fig. 2, the first stage water intake pipe 41 and the third stage water intake pipe 43 are horizontally disposed, and the second stage water intake pipe 42 is vertically disposed at the left side of the plurality of battery packs in the battery cluster 11. The number of battery packs in each battery cluster is equal to the number of third stage water intake pipes 43 corresponding to the battery cluster. By arranging the first-stage water inlet pipe 41 and part of the third-stage water inlet pipe 43 in parallel, and arranging the second-stage water inlet pipe 42 perpendicular to the first-stage water inlet pipe 41 and the third-stage water inlet pipe 43, the embodiment of the utility model can regulate the distribution path of the cooling liquid, avoid disorder of the distribution path of the cooling liquid, and shorten the path length of the cooling liquid reaching a target battery pack.
In an embodiment, referring to fig. 2, the third stage water inlet pipe 43 may be provided with a diameter varying member 431, and the diameter of the diameter varying member 431 varies in a direction toward the corresponding battery pack. The outer surface of the reducing component can be in a truncated cone shape. The diameter-changing member may be provided in plurality, for example, one side of each battery pack in the battery pack 11 may be provided with one diameter-changing member. Of course, the specific variation of the diameter of each variable diameter member may be designed according to actual needs, and the present utility model is not limited thereto. By setting the diameter of the diameter-changing member to be changed in the direction toward the corresponding battery pack, the embodiment of the utility model can control the flow rate of the coolant flowing from the second-stage water intake pipe 42 to each corresponding battery pack as needed, improving the balance of the coolant distributed around each battery pack.
In one embodiment, referring to fig. 2, the first stage water inlet pipe 41 may be connected to the second stage water inlet pipe 42 through an L-shaped joint and a T-shaped joint, and the second stage water inlet pipe 42 may be connected to the third stage water inlet pipe 43 through either the T-shaped joint or the L-shaped joint. It should be noted that, because the arrangement forms of the battery packs are various, in practical application, other types of connectors can be selected to be used for docking different water inlet pipelines according to practical situations. In the utility model, the T-shaped joint and the L-shaped joint are selected as the butt joint parts among different water inlet pipelines, so that the utility model is simple and convenient and has strong universality.
In an embodiment, the first stage water inlet pipe 41 is provided with a one-way valve 411, and the one-way valve 411 is used for controlling the flow direction of the cooling liquid flowing into the first stage water inlet pipe 41. By arranging the check valve 411 between the first stage water intake pipe 41 and the hydraulic pump, the embodiment of the utility model can control the flow direction of the cooling liquid and prevent the cooling liquid from flowing back to the hydraulic pump.
In an embodiment, a filter 412 is disposed between the hydraulic pump and the water tank, and the filter 412 is used for filtering impurities in the cooling liquid extracted from the water tank, so as to prevent the impurities from blocking the pipeline, and improve the circulation efficiency of the cooling liquid.
In an embodiment, as shown in fig. 2, the water return pipe network 5 includes a multi-stage cascade water return pipe, where the multi-stage cascade water return pipe is composed of a first stage water return pipe 51, a second stage water return pipe 52, and a third stage water return pipe 53, and the first stage water return pipe 51, the second stage water return pipe 52, and the third stage water return pipe 53 may be disposed on the battery cluster 12. For convenience of explanation, the water return pipe of the battery cluster on the right side of the battery cluster 11 is described as an example in fig. 2.
Referring to fig. 2, the first-stage water return pipe 51 is connected to the gas-liquid separator 6, the second-stage water return pipe 52 is connected to the first-stage water return pipe 51 and the third-stage water return pipe 53, respectively, and the third-stage water return pipe 53 is disposed at a side surface of the corresponding battery pack 121. The first-stage water return pipeline 51, the second-stage water return pipeline 52 and the third-stage water return pipeline 53 are sequentially arranged, so that a return network for collecting return fluid returned by the liquid cooling plates of the battery packs to the water tank through the gas-liquid separator is formed. By means of step-by-step feedback of the reflux fluid of the side face of each battery pack to the water tank, the reflux path of the reflux fluid can be adjusted adaptively according to the structural arrangement of the battery packs, and therefore the reflux efficiency of the reflux fluid is improved.
In an embodiment, as shown in fig. 2, the first-stage return pipe 51 is partially disposed parallel to the third-stage return pipe 53, and the second-stage return pipe 52 is disposed perpendicular to the first-stage return pipe 51 and the third-stage return pipe 53, respectively. It is noted that in the present utility model, the second-stage return water pipe 52 may be provided in plurality. For example, in a position corresponding to the battery pack on the right side of the battery pack 11 in fig. 2, the first-stage return water pipe 51 is partially disposed horizontally with the third-stage return water pipe 53, while the second-stage return water pipe 52 is disposed vertically, and a plurality of second-stage return water pipes 52 may be disposed in fig. 2. The number of battery packs in each battery cluster may be equal to the number of third-stage return pipes 53 corresponding to the battery cluster. By arranging the first-stage return water pipe 51 and the third-stage return water pipe 53 in parallel, and arranging the second-stage return water pipe 52 and the first-stage return water pipe 51 and the third-stage return water pipe 53 respectively in perpendicular, the embodiment of the utility model can regulate the return path of the return fluid, avoid disorder of the return path of the return fluid, and shorten the path length of the return fluid reaching the target water tank.
In one embodiment, the third stage water inlet pipe 43 may be connected to a corresponding battery pack liquid cooling plate, and the third stage water return pipe 53 may be connected to a corresponding battery pack liquid cooling plate. For example, a battery pack is in a cuboid shape, the left side of the cuboid can be provided with a third-stage water inlet pipeline 43, the right side of the cuboid can be provided with a third-stage water return pipeline 53, a liquid cooling plate is arranged inside the battery pack, and the third-stage water inlet pipeline 43 can be connected with the corresponding third-stage water return pipeline 53 through the liquid cooling plate. The third-stage water return pipe 53 may be provided with a variable-diameter member 531, and the diameter of the variable-diameter member 531 may be changed in a direction toward the corresponding battery pack.
In an embodiment, referring to fig. 2, the first stage return pipe 51 may be connected to the gas-liquid separator by a T-joint, and a plurality of gas-liquid separators corresponding to the different second stage return pipes 52 may be collected to the first stage return pipe 51 by a T-joint and an L-joint. The second-stage water return pipe 52 and the third-stage water return pipe 53 may be connected by a T-joint or an L-joint. It should be noted that, because the arrangement forms of the battery packs are various, in practical application, other types of connectors can be selected to be connected with different water return pipelines according to practical situations. In the utility model, the T-shaped connector and the L-shaped connector are selected as the butt joint parts among different water return pipelines, so that the method is simple and convenient and has strong universality.
In an embodiment, the liquid cooling energy storage system further comprises an air pump 8, the air pump 8 is connected with the gas-liquid separator and the condenser respectively, and the air pump 8 is used for sucking the reflux gas conveyed by the gas-liquid separator into the condenser. The air pump 8 may be provided on a side of the water tank, for example. In particular, the air pump 8 may be provided in the equipment compartment. The arrangement of the air pump 8 is advantageous for driving the return air separated by the different gas-liquid separators to be transferred to the condenser, so that the return air is cooled in the condenser. The type of the air pump 8 may be selected as needed, and the present utility model is not limited thereto.
In an embodiment, a solenoid valve is provided in the gas-liquid separator for controlling a flow rate of the reflux liquid in the gas-liquid separator discharged into the water tank. For example, the solenoid valve may be electrically connected to a battery management system. The battery management system can send out a command to control the electromagnetic valve to switch at regular time so as to control the backflow liquid in the gas-liquid separator to be returned to the water tank through the connector.
In an embodiment, a liquid sensor may be further disposed in the gas-liquid separator, and the liquid sensor may be disposed on an inner wall of the gas-liquid separator, for detecting a height of the reflux liquid in the gas-liquid separator. The liquid sensor may be electrically connected to the battery management system. When the liquid sensor detects that the reflux liquid in the gas-liquid separator reaches a preset threshold value, the height information of the reflux liquid can be transmitted to the battery management system, and the battery management system controls the electromagnetic valve to be opened according to the height information, so that the reflux liquid in the gas-liquid separator is discharged into the water tank under the action of air pressure, otherwise, when the liquid sensor detects that the reflux liquid in the gas-liquid separator does not reach the preset threshold value, the electromagnetic valve is kept closed. By providing an electromagnetic valve in the gas-liquid separator, the flow rate of the reflux liquid in the gas-liquid separator discharged into the water tank can be controlled.
Fig. 3 shows a schematic diagram of the structure of a gas-liquid separator according to an embodiment of the present utility model. As shown in fig. 3, the gas-liquid separator may include a housing 61, a liquid product cartridge 62, an inlet 63, a reflux gas outlet 64, and a reflux liquid outlet 65. The housing 61 is provided integrally with the dropsy cartridge 62. An inlet 63 is provided on the right side surface of the housing 61 for inputting the return fluid on the plurality of second-stage return pipes 52 into the interior of the housing 61; a return gas outlet 64 is provided on the top side surface of the housing 61 for outputting the return gas to the air pump 8; a return liquid outlet 65 is provided on the bottom side surface of the effusion cell 62 for outputting the return liquid into the water tank. The effusion cell 62 is used for accommodating the reflux liquid after gas-liquid separation.
Fig. 4 shows a schematic cross-sectional view of a gas-liquid separator according to an embodiment of the utility model. Referring to fig. 4, a plurality of baffles 611 are provided in the housing 61, and the baffles 611 are parallel to each other. The cartridge 62 is provided on the top side thereof with a cover plate 612, and the plurality of baffles 611 are provided on the surface of one side of the cover plate 612. The plurality of baffles 611 are disposed to intersect the cover 612, respectively. For example, the plurality of baffles 611 perpendicularly intersect the cover 612, respectively. By providing a plurality of baffles, the return fluid can be driven to flow in a serpentine manner between the baffles, thereby improving the separation efficiency for the return fluid.
Fig. 5 shows a schematic structural diagram of a cover plate according to an embodiment of the present utility model. As shown in fig. 5, the cover plate 621 may be provided with a plurality of holes 6210. The hole 6210 may be circular. The plurality of holes 6210 may be respectively disposed between two adjacent baffles 611. The length of the baffle 611 in the vertical direction may be smaller than the width of the cover plate 621 in the vertical direction so as to form a serpentine flow path. The plurality of holes 6210 may be configured to allow the backflow fluid in the backflow fluid to enter the interior of the effusion cell under the force of gravity.
In an embodiment, the phase change material may be a fluorocarbon. Because the liquid cooling energy storage system needs proper boiling point, narrower boiling range and high vaporization latent heat, the performance of the phase change material can be improved by adopting fluorocarbon compounds. Illustratively, the phase change material may be R141b or R123. It should be noted that pressure fluctuation can be generated in the phase change process of the traditional phase change material, and the control process is complex, but the embodiment of the utility model can reduce the pressure fluctuation in the pipeline and improve the stability of the flow of the reflux fluid by performing gas-liquid separation on the reflux fluid through the gas-liquid separator.
In summary, the embodiment of the utility model can make the heat transfer of the cooling liquid more effective by adopting the cooling liquid made of the phase change material to circularly reciprocate in the water tank, the water inlet pipe network and the water return pipe network, so that the cooling liquid can take away more heat under the same flow compared with the common cooling liquid, the heat dissipation effect of the cooling liquid is improved, the flow deviation range of the cooling liquid is widened, and the restriction of the design of the liquid cooling pipeline is relaxed. In addition, through setting up gas-liquid separator and condenser, can carry out gas-liquid separation to the backward flow fluid, reduce the pressure fluctuation in the pipeline, promote the stability of backward flow fluid flow. On the basis, the allowable error range of the pipeline and joint design is correspondingly increased, the risk of pipeline installation errors is reduced, and the universality of the pipeline design is improved.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above describes the liquid cooling energy storage system provided by the embodiment of the present utility model in detail, and specific examples are applied to illustrate the principle and implementation of the present utility model, and the description of the above embodiment is only used to help understand the technical solution and core idea of the present utility model; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. A liquid-cooled energy storage system, the liquid-cooled energy storage system comprising:
at least one battery cluster including a plurality of battery packs arranged in a row and column form;
the water tank is arranged on the side face of the battery cluster and is used for containing cooling liquid;
the hydraulic pump is connected with the water tank and is used for extracting the cooling liquid in the water tank and conveying the extracted cooling liquid to a water inlet pipe network;
the water inlet pipe network is connected with the hydraulic pump and is used for distributing the cooling liquid extracted by the hydraulic pump to the liquid cooling plates of each battery pack in the battery cluster;
the water return pipe network is connected with the liquid cooling plates and is used for conveying the reflux fluid of each battery pack liquid cooling plate to the gas-liquid separator;
the gas-liquid separator is connected with the water return pipe network and is used for separating the reflux gas and the reflux liquid in the reflux fluid and returning the reflux liquid to the water tank;
the condenser is arranged between the water tank and the gas-liquid separator and is used for condensing the reflux gas and conveying condensed liquid after condensation back to the water tank so that the cooling liquid circularly reciprocates in the liquid cooling energy storage system, and the cooling liquid is made of a phase change material.
2. The liquid-cooled energy storage system of claim 1, wherein the water intake pipe network comprises a multi-stage cascade water intake pipe comprising a first stage water intake pipe, a second stage water intake pipe, and a third stage water intake pipe, wherein the first stage water intake pipe is connected to the hydraulic pump, the second stage water intake pipe is connected to the first stage water intake pipe and the third stage water intake pipe, respectively, and the third stage water intake pipe is disposed on a side of the corresponding battery pack.
3. The liquid cooled energy storage system of claim 2, wherein the first stage water intake conduit is disposed parallel to a portion of the third stage water intake conduit, and the second stage water intake conduit is disposed perpendicular to the first stage water intake conduit and the third stage water intake conduit, respectively.
4. A liquid cooled energy storage system according to claim 2 or 3, wherein the third stage inlet conduit is provided with a variable diameter member, the diameter of the variable diameter member varying in a direction towards the corresponding battery pack.
5. A liquid cooled energy storage system according to claim 2 or 3, wherein the first stage inlet conduit is provided with a one-way valve for controlling the flow direction of the cooling liquid flowing into the first stage inlet conduit.
6. The liquid-cooled energy storage system of claim 1, wherein the return water pipe network comprises a multi-stage cascade return water pipe, the multi-stage cascade return water pipe is composed of a first stage return water pipe, a second stage return water pipe and a third stage return water pipe, wherein the first stage return water pipe is connected with the gas-liquid separator, the second stage return water pipe is connected with the first stage return water pipe and the third stage return water pipe respectively, and the third stage return water pipe is arranged on the side surface of the corresponding battery pack.
7. The liquid cooled energy storage system of claim 6, wherein the first stage return conduit portion is disposed in parallel with the third stage return conduit, and the second stage return conduit is disposed perpendicular to the first stage return conduit and the third stage return conduit, respectively.
8. A liquid cooled energy storage system according to any of claims 1-3, further comprising an air pump respectively connected to the gas-liquid separator and the condenser, the air pump being configured to pump the return gas delivered by the gas-liquid separator into the condenser.
9. A liquid cooled energy storage system according to any one of claims 1-3, wherein a solenoid valve is provided in the gas-liquid separator for controlling the flow of the return liquid in the gas-liquid separator to the tank.
10. A liquid cooled energy storage system according to any of claims 1-3, wherein a plurality of baffles and a cover plate are provided in the gas-liquid separator, the plurality of baffles intersecting the cover plate, respectively, to form a serpentine return fluid channel.
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| CN202320581846.3U CN219716981U (en) | 2023-03-20 | 2023-03-20 | Liquid cooling energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116207398A (en) * | 2023-02-22 | 2023-06-02 | 武汉亿纬储能有限公司 | Liquid cooling energy storage system and preparation method of cooling liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116207398A (en) * | 2023-02-22 | 2023-06-02 | 武汉亿纬储能有限公司 | Liquid cooling energy storage system and preparation method of cooling liquid |
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