CN117477096A - Liquid cooling system and energy storage container - Google Patents

Liquid cooling system and energy storage container Download PDF

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Publication number
CN117477096A
CN117477096A CN202311522091.0A CN202311522091A CN117477096A CN 117477096 A CN117477096 A CN 117477096A CN 202311522091 A CN202311522091 A CN 202311522091A CN 117477096 A CN117477096 A CN 117477096A
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CN
China
Prior art keywords
liquid
main pipe
pipe
return
battery
Prior art date
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Pending
Application number
CN202311522091.0A
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Chinese (zh)
Inventor
孙中豪
麻超杰
顾伟峰
钱昊
李文鹏
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Beijing Hyperstrong Technology Co Ltd
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Beijing Hyperstrong Technology Co Ltd
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Application filed by Beijing Hyperstrong Technology Co Ltd filed Critical Beijing Hyperstrong Technology Co Ltd
Priority to CN202311522091.0A priority Critical patent/CN117477096A/en
Publication of CN117477096A publication Critical patent/CN117477096A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The embodiment of the invention provides a liquid cooling system and an energy storage container, and relates to the technical field of energy storage. The liquid feeding pipe group of the liquid cooling system comprises a liquid feeding main pipe and a plurality of liquid feeding branch pipes, and the liquid return pipe group comprises a liquid return main pipe and a plurality of liquid return branch pipes; the liquid return manifold includes a first manifold and a second manifold. The junction through second house steward and first house steward sets up in the middle of two battery clusters at both ends in a plurality of battery clusters that correspond of first house steward, through the internal diameter that each liquid feeding branch pipe of liquid feeding branch pipe was from the top of liquid feeding main pipe directional direction of the bottom of liquid feeding main pipe in proper order increase to can make the flow of each battery package even, and then can make each battery package temperature difference less, improved energy storage container's life.

Description

Liquid cooling system and energy storage container
Technical Field
The invention relates to the technical field of energy storage, in particular to a liquid cooling system and an energy storage container.
Background
The energy storage container is widely and widely applied to various links from power generation to power utilization in the fields of new energy, smart power grids, energy saving technologies and the like, and the functions of the energy storage container mainly comprise upgrading and reforming of a traditional power grid, peak regulation and frequency modulation power assistance, peak clipping and valley filling, and the renewable energy grid-connection capability is improved.
In the prior art, the energy storage container comprises a liquid cooling system and a plurality of battery clusters, wherein the liquid cooling system comprises a cooling unit, a liquid feeding main pipe, a liquid returning main pipe, liquid feeding branch pipes and liquid returning branch pipes, the cooling unit is used for supplying cooling liquid, the liquid feeding main pipe and the liquid returning main pipe are respectively connected with the cooling unit, the liquid feeding main pipe is connected with the liquid feeding branch pipes, and the liquid returning main pipe is connected with the liquid returning branch pipes. The liquid conveying branch pipes comprise liquid conveying main pipelines and a plurality of liquid conveying branch pipelines, the liquid conveying main pipelines extend vertically, the bottom ends of the liquid conveying main pipelines are communicated with the liquid conveying main pipelines, the liquid conveying branch pipelines are arranged at intervals along the length direction of the liquid conveying main pipelines, each liquid conveying branch pipe corresponds to one battery cluster, one liquid conveying branch pipeline of each liquid conveying branch pipe is communicated with a cooling pipeline of one battery pack in the corresponding battery cluster, and cooling liquid can be conveyed for each battery pack; the return branch pipe comprises a return liquid main pipeline and a plurality of return liquid branch pipelines, the return liquid main pipeline extends vertically, the bottom end of the return liquid main pipeline is communicated with a return liquid main pipeline, the plurality of return liquid branch pipelines are arranged at intervals along the length direction of the return liquid main pipeline, each return liquid branch pipeline corresponds to one battery cluster, one return liquid branch pipeline of each return liquid branch pipeline is communicated with a cooling pipeline of one battery pack in the corresponding battery cluster, and cooling liquid of each battery pack can be conveyed to the return liquid branch pipeline.
However, the flow distribution of each battery pack is large, resulting in a large temperature difference of each battery pack, which reduces the service life of the energy storage container.
Disclosure of Invention
The embodiment of the invention provides a liquid cooling system and an energy storage container, which are used for solving the problems that the temperature difference of each battery pack is large and the service life of the energy storage container is reduced due to the large flow distribution difference of each battery pack.
In one aspect, an embodiment of the present invention provides a liquid cooling system, which is applied to an energy storage container, where the energy storage container includes a plurality of battery clusters, and the liquid cooling system includes a cooling unit, a liquid feeding pipe set and a liquid return pipe set;
the liquid delivery pipe group comprises a liquid delivery main pipe and a plurality of liquid delivery branch pipes, the liquid return pipe group comprises a liquid return main pipe and a plurality of liquid return branch pipes, the liquid delivery main pipe and the liquid return main pipe are respectively connected with the cooling unit, the liquid delivery main pipe is connected with the liquid delivery branch pipes, and the liquid return main pipe is connected with the liquid return branch pipes;
each liquid conveying branch pipe comprises a liquid conveying main pipe and a plurality of liquid conveying branch pipes, wherein the liquid conveying main pipes extend vertically, the bottom ends of the liquid conveying main pipes are communicated with the liquid conveying main pipe, the liquid conveying branch pipes are arranged at intervals along the length direction of the liquid conveying main pipe, and the inner diameters of the liquid conveying branch pipes are sequentially increased from the top ends of the liquid conveying main pipes to the bottom ends of the liquid conveying main pipes;
the liquid return main pipe comprises a first main pipe and a second main pipe, the first main pipe is connected with a plurality of liquid return branch pipes, the second main pipe is connected between the cooling unit and the first main pipe, a plurality of battery clusters corresponding to the first main pipe are sequentially arranged along the length direction of the energy storage container, and the joint of the second main pipe and the first main pipe is arranged in the middle of two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe.
In one possible embodiment, each of the liquid return branch pipes includes a liquid return main pipe and a plurality of liquid return branch pipes, the liquid return main pipe extends vertically, the bottom end of the liquid return main pipe is communicated with the first main pipe, the plurality of liquid return branch pipes are arranged at intervals along the length direction of the liquid return main pipe, and the inner diameters of the liquid return branch pipes are sequentially reduced from the top end of the liquid return main pipe to the direction of the bottom end of the liquid delivery main pipe.
In one possible implementation manner, the energy storage container comprises two liquid feeding pipe groups and two liquid return pipe groups, wherein the two liquid feeding pipe groups and the two liquid return pipe groups are arranged at intervals in the width direction of the energy storage container, each liquid feeding pipe group corresponds to one liquid return pipe group, and the number of battery clusters corresponding to the two liquid feeding pipe groups is equal.
In one possible embodiment, a regulating valve is provided on one second manifold of the two fluid return line groups, the regulating valve being configured to regulate the fluid return pressure of the corresponding second manifold.
In one possible embodiment, the length of the second manifold provided with the regulating valve is smaller than the length of the second manifold not provided with the regulating valve.
In one possible embodiment, the energy storage container includes a first battery cluster group and a second battery cluster group, each of the first battery cluster group and the second battery cluster group includes a plurality of the battery clusters, the number of battery clusters of the first battery cluster group is equal to the number of battery clusters of the second battery cluster group, and the first battery cluster group and the second battery cluster group are arranged at intervals in a width direction of the energy storage container;
the two liquid feeding pipe groups and the two liquid return pipe groups are positioned between the first battery cluster group and the second battery cluster group.
In one possible embodiment, the liquid cooling system further comprises a plurality of connection joints, and each of the liquid-feeding branch pipes and each of the liquid-returning branch pipes are connected at their ends to one of the connection joints.
In one possible embodiment, the first and second manifolds of the return manifold lie in the same plane, and the feed manifold is located below the return manifold in the height direction of the storage container.
In one possible embodiment, the top end of the liquid return branch pipe is provided with an exhaust valve, and the exhaust valve is opened when the gas pressure at the top end of the liquid return branch pipe is greater than a pressure threshold value.
In another aspect, an embodiment of the present invention provides an energy storage container, including a plurality of battery clusters and a liquid cooling system as described above;
the battery cluster is provided with a cooling pipeline, and a liquid feeding branch pipe and a liquid returning branch pipe of the liquid cooling system are respectively communicated with the cooling pipeline of the battery cluster.
The embodiment of the invention provides a liquid cooling system and an energy storage container, comprising a cooling unit, a liquid feeding pipe group and a liquid return pipe group; the liquid delivery pipe group comprises a liquid delivery main pipe and a plurality of liquid delivery branch pipes, the liquid return pipe group comprises a liquid return main pipe and a plurality of liquid return branch pipes, the liquid delivery main pipe and the liquid return main pipe are respectively connected with the cooling unit, the liquid delivery main pipe is connected with the plurality of liquid delivery branch pipes, and the liquid return main pipe is connected with the plurality of liquid return branch pipes; each liquid conveying branch pipe comprises a liquid conveying main pipeline and a plurality of liquid conveying branch pipelines, wherein the liquid conveying main pipeline vertically extends, the bottom end of the liquid conveying main pipeline is communicated with the liquid conveying main pipeline, the liquid conveying branch pipelines are arranged at intervals along the length direction of the liquid conveying main pipeline, and the inner diameters of the liquid conveying branch pipelines of the liquid conveying branch pipes sequentially increase in the direction from the top end of the liquid conveying main pipeline to the bottom end of the liquid conveying main pipeline; the liquid return main pipe comprises a first main pipe and a second main pipe, the first main pipe is connected with a plurality of liquid return branch pipes, the second main pipe is connected between the cooling unit and the first main pipe, a plurality of battery clusters corresponding to the first main pipe are sequentially arranged along the length direction of the energy storage container, and the joint of the second main pipe and the first main pipe is arranged in the middle of two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe. The connection part of the second main pipe and the first main pipe is arranged in the middle of two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe, so that the flow distribution difference of each battery cluster is reduced, the inner diameter of each liquid conveying branch pipe of the liquid conveying branch pipe is sequentially increased in the direction from the top end of the liquid conveying main pipe to the bottom end of the liquid conveying main pipe, the pipeline resistance of each liquid conveying branch pipe of the liquid conveying branch pipe is sequentially reduced in the direction from the top end of the liquid conveying main pipe to the bottom end of the liquid conveying main pipe, the pressure difference of cooling liquid at the inlet of each battery pack of the battery cluster is reduced, the flow of each battery pack is uniform, the temperature difference of each battery pack is further smaller, and the service life of the energy storage container is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a liquid cooling system according to an embodiment of the present invention;
FIG. 2 is a schematic front view of the liquid cooling system of FIG. 1;
FIG. 3 is an enlarged schematic view at A in FIG. 1;
fig. 4 is a schematic top view of a liquid cooling system, a first battery cluster set, and a second battery cluster set according to an embodiment of the present invention.
Reference numerals illustrate:
10-cooling units; 20-a liquid feeding main pipe; 21-a liquid feeding branch pipe; 211-a liquid-feeding main pipeline; 212-a fluid-delivery branch conduit; 30-a liquid return main pipe; 301-a first manifold; 302-a second manifold; 31-a liquid return branch pipe; 311-a liquid return main pipeline; 312-a return branch conduit; 40-regulating valve; 41-connection joints; 42-exhaust valve; 50-a first battery cluster group; 60-second battery cluster group.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the above description, descriptions of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
As described in the background art, the flow distribution difference of each battery pack is large, so that the temperature difference of each battery pack is large, and the service life of the energy storage container is reduced. The inventor researches find that the problem occurs because the liquid return main pipe is a pipeline, one end of the pipeline in the length direction is connected with the cooling unit, the flow rate of the cooling liquid in the direction from the bottom end of the liquid delivery main pipe to the top end of the liquid delivery main pipe is gradually reduced, the pressure of the cooling liquid in the liquid delivery main pipe is gradually increased in the direction from the bottom end of the liquid delivery main pipe to the top end of the liquid delivery main pipe according to the Bernoulli principle, namely the principle that the flow rate is larger and the pressure is smaller, and the pressure difference of the cooling liquid at the inlet of each battery pack of the battery cluster is larger due to the fact that the inner diameters of the liquid delivery branch pipes are the same, so that the flow distribution difference of each battery pack is larger, the temperature difference of each battery pack is larger, and the service life of the energy storage container is reduced.
In order to solve the above problems, an embodiment of the present invention provides a liquid cooling system and an energy storage container, including a cooling unit, a liquid feeding tube set and a liquid returning tube set; the liquid delivery pipe group comprises a liquid delivery main pipe and a plurality of liquid delivery branch pipes, the liquid return pipe group comprises a liquid return main pipe and a plurality of liquid return branch pipes, and the liquid return main pipe comprises a first main pipe and a second main pipe. The connection part of the second main pipe and the first main pipe is arranged in the middle of two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe, so that the flow distribution difference of each battery cluster is reduced, the inner diameter of each liquid conveying branch pipe of the liquid conveying branch pipe is sequentially increased in the direction from the top end of the liquid conveying main pipe to the bottom end of the liquid conveying main pipe, the pipeline resistance of each liquid conveying branch pipe of the liquid conveying branch pipe is sequentially reduced in the direction from the top end of the liquid conveying main pipe to the bottom end of the liquid conveying main pipe, the pressure difference of cooling liquid at the inlet of each battery pack of the battery cluster is reduced, the flow of each battery pack is uniform, the temperature difference of each battery pack is further reduced, and the service life of the energy storage container is prolonged.
The liquid cooling system and the energy storage container provided by the embodiment of the invention are described in detail below with reference to specific embodiments.
As shown in fig. 1 to 4, an embodiment of the present invention provides a liquid cooling system applied to an energy storage container, where the energy storage container includes a plurality of battery clusters.
As shown in fig. 1 and 2, the liquid cooling system includes a cooling unit 10, a liquid feed pipe group, and a liquid return pipe group; the liquid delivery pipe group comprises a liquid delivery main pipe 20 and a plurality of liquid delivery branch pipes 21, the liquid return pipe group comprises a liquid return main pipe 30 and a plurality of liquid return branch pipes 31, the liquid delivery main pipe 20 and the liquid return main pipe 30 are respectively connected with the cooling unit 10, the liquid delivery main pipe 20 is connected with the plurality of liquid delivery branch pipes 21, and the liquid return main pipe 30 is connected with the plurality of liquid return branch pipes 31.
As shown in fig. 1 and 3, each of the liquid feeding branch pipes 21 includes a liquid feeding main pipe 211 and a plurality of liquid feeding branch pipes 212, the liquid feeding main pipe 211 extends vertically, the bottom end of the liquid feeding main pipe 211 communicates with the liquid feeding main pipe 20, the plurality of liquid feeding branch pipes 212 are arranged at intervals along the length direction of the liquid feeding main pipe 211, and the inner diameters of the respective liquid feeding branch pipes 212 of the liquid feeding branch pipes 21 increase in sequence from the top end of the liquid feeding main pipe 211 toward the bottom end of the liquid feeding main pipe 211.
As shown in fig. 4, the liquid return main pipe 30 includes a first main pipe 301 and a second main pipe 302, the first main pipe 301 is connected to the plurality of liquid return branch pipes 31, the second main pipe 302 is connected between the cooling unit 10 and the first main pipe 301, the plurality of battery clusters corresponding to the first main pipe 301 are sequentially arranged along the length direction of the energy storage container, and the connection part between the second main pipe 302 and the first main pipe 301 is arranged in the middle of two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe 301.
Wherein, the cooling unit 10 provides cooling liquid, the liquid delivery main pipe 20 and the liquid delivery branch pipe 21 form a liquid delivery pipeline, the liquid return main pipe 30 and the liquid return branch pipe 31 form a liquid return pipeline, the cooling unit 10 leads the cooling liquid into the cooling pipeline of the battery cluster through the liquid delivery pipeline, the cooling liquid in the cooling pipeline of the battery cluster carries heat of the battery cluster, and the cooling liquid returns to the cooling unit 10 through the liquid return pipeline. The temperature of the battery cluster is reduced by circulating and reciprocating in this way, and the purpose of cooling the battery cluster is achieved.
In fig. 1, the X-axis direction is the length direction of the energy storage container, the Y-axis direction is the width direction of the energy storage container, and the Z-axis direction is the height direction of the energy storage container.
The cooling unit 10 not only provides power for the flow of the cooling liquid, but the cooling unit 10 can dissipate heat in the recirculated cooling liquid.
The cooling unit 10 includes a power pump, which may be a water pump, and a refrigeration assembly for dissipating heat from the return coolant to power the coolant flow.
The cooling unit 10 is located outside the tank body of the energy storage container, and the liquid feeding pipeline, the liquid returning pipeline and the battery cluster are installed inside the tank body of the energy storage container.
One end of the liquid feeding main pipe 20 is communicated with a liquid discharge port of the cooling unit 10, and one end of the liquid feeding main pipe 20, which is away from the cooling unit 10, is closed, that is, one end of the liquid feeding main pipe 20, which is away from the cooling unit 10, cannot flow out of cooling liquid.
The liquid feed main pipe 211 of the liquid feed branch pipe 21 communicates with the side face of the liquid feed main pipe 20. As shown in fig. 3 and 4, the plurality of liquid feeding main pipes 211 of the liquid feeding tube group are disposed at intervals along the length direction of the energy storage container, that is, the plurality of liquid feeding main pipes 211 of the liquid feeding tube group are disposed at intervals along the X-axis direction.
The liquid feeding main pipe 211 extends along the Z-axis direction, the liquid feeding main pipe 211 is a cylindrical pipe, and the inner diameter of the liquid feeding main pipe 211 is constant. The liquid feeding main pipe 211 is perpendicular to the liquid feeding main pipe 20, and the cooling liquid in the liquid feeding main pipe 211 flows from bottom to top along the height direction of the energy storage container, that is, the cooling liquid in the liquid feeding main pipe 211 flows from bottom to top along the +z axis direction.
The flow rate of the cooling liquid in the liquid feeding main pipe 211 gradually decreases in a direction from the bottom end of the liquid feeding main pipe 211 toward the top end of the liquid feeding main pipe 211, and the pressure of the cooling liquid in the liquid feeding main pipe 211 gradually increases in a direction from the bottom end of the liquid feeding main pipe toward the top end of the liquid feeding main pipe 211 according to the bernoulli principle, i.e., the principle that the larger the flow rate is, the smaller the pressure is. The direction from the bottom end of the liquid feeding main pipe to the top end of the liquid feeding main pipe 211 is +z-axis direction.
Each of the liquid feeding branches 21 corresponds to one battery cluster. Typically, the battery pack includes a plurality of battery packs arranged at vertical intervals, each battery pack being provided with a cooling duct. Accordingly, the liquid feeding branch pipe 21 in the embodiment of the present application simultaneously conveys the cooling liquid for a plurality of battery packs in the same battery cluster, and one liquid feeding branch pipe 212 of each liquid feeding branch pipe 21 is communicated with the cooling pipe of one battery pack in the corresponding battery cluster, so that the cooling liquid can be conveyed for the corresponding battery pack.
The branched liquid feeding pipe 212 is a cylindrical pipe, and the inside diameter of the branched liquid feeding pipe 212 is constant. In a direction from the top end of the liquid feed main pipe 211 toward the bottom end of the liquid feed main pipe 211, that is, in the-Z axis direction, the inner diameter of the liquid feed branch pipe 212 above in the adjacent two liquid feed branch pipes 212 is smaller than the inner diameter of the liquid feed branch pipe 212 below, the pipe resistance of the liquid feed branch pipe 212 above can be made larger than the pipe resistance of the liquid feed branch pipe 212 below, and the pressure difference of the cooling liquid at the inlets of the adjacent two battery packs of the battery cluster can be made smaller.
The plurality of liquid-feeding branch pipes 212 of the liquid-feeding branch pipe 21 may be arranged at regular intervals along the length direction of the liquid-feeding branch pipe 212, or may be unevenly disposed, that is, the plurality of liquid-feeding branch pipes 212 of the liquid-feeding branch pipe 21 may be arranged at regular intervals along the Z-axis direction, or may be unevenly disposed.
The liquid feeding main pipe 20 and the liquid returning main pipe 30 are arranged at the bottom of the battery cluster, so that the space at the top of the battery cluster is not occupied, the installation occupied space is small, the integration level of the liquid cooling system is high, and the adjustment and maintenance of pipelines in the field are convenient; and, liquid delivery manifold 20 and liquid return manifold 30 set up in the bottom of battery cluster, reduce the influence of comdenstion water, pipeline leakage etc. to energy storage container electrical components, improve electrical security.
One end of the second main pipe 302 is communicated with a liquid return port of the cooling unit 10, and one end of the second main pipe 302, which is away from the cooling unit 10, is communicated with the first main pipe 301. The first manifold 301 and the second manifold 302 of the return manifold 30 may be located in the same plane and the supply manifold 20 may be located below the return manifold 30 in the height direction of the storage container.
Each of the liquid return branch pipes 31 corresponds to one battery cluster and one liquid feed branch pipe 21. The return branch pipe 31 communicates with the side surface of the first manifold 301 of the return manifold 30.
Two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe 301 are two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe 301 along the length direction of the energy storage container, the first main pipe 301 extends along the length direction of the energy storage container, and the joint of the second main pipe 302 and the first main pipe 301 is arranged in the middle of the two battery clusters in the length direction of the energy storage container, so that the flow distribution difference of each battery cluster can be reduced.
According to the liquid cooling system provided by the embodiment of the invention, the joint of the second main pipe 302 and the first main pipe 301 is arranged in the middle of two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe 301, so that the flow distribution difference of each battery cluster can be reduced, the inner diameter of each liquid conveying branch pipe 212 of the liquid conveying branch pipe 21 is sequentially increased in the direction from the top end of the liquid conveying main pipe 211 to the bottom end of the liquid conveying main pipe 211, the pipeline resistance of each liquid conveying branch pipe 212 of the liquid conveying branch pipe 21 is sequentially reduced in the direction from the top end of the liquid conveying main pipe 211 to the bottom end of the liquid conveying main pipe 211, the pressure difference of cooling liquid at the inlet of each battery pack of the battery cluster can be reduced, the flow of each battery pack can be uniform, the temperature difference of each battery pack can be smaller, and the service life of the energy storage container is prolonged.
In one possible embodiment, as shown in fig. 3, each of the liquid return branch pipes 31 includes a liquid return main pipe 311 and a plurality of liquid return branch pipes 312, the liquid return main pipe 311 extends vertically, the bottom end of the liquid return main pipe 311 communicates with the first main pipe 301, the plurality of liquid return branch pipes 312 are arranged at intervals along the length direction of the liquid return main pipe 311, and the inner diameters of the respective liquid return branch pipes 312 of the liquid return branch pipes 31 sequentially decrease in the direction from the top end of the liquid return main pipe 311 toward the bottom end of the liquid feed main pipe 211.
Wherein, the liquid return main pipe 311 of the liquid return branch pipe 31 communicates with the side surface of the first main pipe 301. The plurality of return main conduits 311 of the return tube set are arranged at intervals along the length direction of the energy storage container, that is, the plurality of return branch conduits 312 of the return tube set are arranged at intervals along the X-axis direction.
The liquid return main pipeline 311 and the liquid delivery main pipeline 211 are arranged in parallel, the liquid return main pipeline 311 extends along the Z-axis direction, the liquid return main pipeline 311 is a cylindrical pipe, and the inner diameter of the liquid return main pipeline 311 is constant. The liquid return main pipe 311 is perpendicular to the first main pipe 301, and the cooling liquid in the liquid return main pipe 311 flows from top to bottom along the height direction of the energy storage container, that is, the cooling liquid in the liquid return main pipe 311 flows from top to bottom along the-Z axis direction.
The flow rate of the cooling liquid in the liquid return main conduit 311 gradually increases in a direction from the top end of the liquid return main conduit 311 toward the bottom end of the liquid feed main conduit 211, and the pressure of the cooling liquid in the liquid return main conduit 311 gradually decreases in a direction from the top end of the liquid return main conduit 311 toward the bottom end of the liquid feed main conduit 211 according to the bernoulli principle, i.e., the principle that the larger the flow rate, the smaller the pressure. The direction from the top end of the return main pipe 311 to the bottom end of the liquid feeding main pipe 211 is the-Z axis direction.
Each liquid return branch pipe 31 corresponds to one battery cluster and one liquid delivery branch pipe 21, and the liquid return branch pipe 31 and the liquid delivery branch pipe 21 corresponding to the battery cluster are respectively positioned at two sides of the battery cluster in the length direction of the energy storage container. One of the return branch pipes 312 of each of the return branch pipes 31 communicates with the cooling pipe of one of the battery packs in the corresponding battery cluster, and the cooling liquid of the battery pack can be flowed into the return branch pipe 312. Note that the liquid return branch pipe 312 and the liquid feed branch pipe 212 corresponding to each battery pack of the battery cluster are located at the same height in the height direction of the energy storage container.
The return branch conduit 312 is a cylindrical pipe, and the inner diameter of the return branch conduit 312 is constant. In the direction from the top end of the liquid return main pipe 311 to the bottom end of the liquid delivery main pipe 211, that is, in the-Z axis direction, the inner diameter of the liquid return branch pipe 312 above the two adjacent liquid return branch pipes 312 is larger than the inner diameter of the liquid return branch pipe 312 below, so that the pipe resistance of the liquid return branch pipe 312 above is smaller than the pipe resistance of the liquid return branch pipe 312 below, the pressure difference of the cooling liquid at the inlets of the two adjacent battery packs of the battery cluster can be reduced, the flow rate of each battery pack can be uniform, the temperature difference of each battery pack can be smaller, and the service life of the energy storage container is prolonged.
The plurality of liquid return branch pipes 312 of the liquid return branch pipe 31 may be arranged at uniform intervals along the height direction of the liquid return main pipe 311, or may be unevenly disposed, that is, the plurality of liquid return branch pipes 312 of the liquid return branch pipe 31 may be arranged at uniform intervals along the Z-axis direction, or may be unevenly disposed.
In one possible implementation manner, the liquid cooling system comprises two liquid feeding pipe groups and two liquid return pipe groups, the two liquid feeding pipe groups and the two liquid return pipe groups are arranged at intervals in the width direction of the energy storage container, each liquid feeding pipe group corresponds to one liquid return pipe group, and the number of battery clusters corresponding to the two liquid feeding pipe groups is equal.
The width direction of the energy storage container is the Y-axis direction.
As shown in fig. 1, the liquid-feeding branch pipes 21 of each liquid-feeding pipe group and the liquid-returning branch pipes 31 of the corresponding liquid-returning pipe group are alternately arranged in the width direction of the energy storage container.
The number of the battery clusters corresponding to each liquid feeding pipe group is equal to that of the battery clusters corresponding to each liquid return pipe group.
In some examples, the number of battery clusters corresponding to the two liquid feeding tube groups is 5.
In one possible embodiment, as shown in fig. 4, a regulator valve 40 is provided on one second manifold 302 of the two sets of return fluid, the regulator valve 40 being configured to regulate the return fluid pressure of the corresponding second manifold 302.
Wherein, a second main pipe 302 of the two liquid return pipe groups is provided with a regulating valve 40, and the other second main pipe 302 is not provided with a regulating valve.
The hydraulic pressure of the second manifolds 302 is adjusted by the adjusting valve 40, so that the hydraulic pressures of the second manifolds 302 in the two liquid return tube sets are identical, that is, the hydraulic pressures of the second manifolds 302 in the two liquid return tube sets are equal, so that the flow rates of the two liquid return manifolds 30 in the two liquid return tube sets are identical, that is, the flow rates of the two liquid return manifolds 30 in the two liquid return tube sets are equal, and then the flow rates of the battery packs are uniform.
In one possible embodiment, the length of the second manifold 302 provided with the regulator valve 40 is less than the length of the second manifold 302 not provided with the regulator valve 40.
The second manifold 302 provided with the regulator valve 40 may be a linear pipe, and the second manifold 302 not provided with the regulator valve 40 may be a curved pipe. In some examples, the hydraulic pressure back to the second manifold 302 corresponding to the regulator valve 40 may be reduced such that the hydraulic pressure back to the second manifold 302 provided with the regulator valve 40 and the second manifold 302 not provided with the regulator valve 40 are consistent.
In one possible embodiment, as shown in fig. 4, the energy storage container includes a first battery cluster group 50 and a second battery cluster group 60, each of the first battery cluster group 50 and the second battery cluster group 60 includes a plurality of battery clusters, the number of battery clusters of the first battery cluster group 50 is equal to the number of battery clusters of the second battery cluster group 60, and the first battery cluster group 50 and the second battery cluster group 60 are disposed at intervals in the width direction of the energy storage container.
Wherein, the battery clusters corresponding to one of the two liquid feeding tube sets and one of the two liquid returning tube sets form a first battery cluster set 50, and the battery clusters corresponding to the other of the two liquid feeding tube sets and the other of the two liquid returning tube sets form a second battery cluster set 60.
Two sets of liquid supply lines and two sets of liquid return lines are located between the first cluster set 50 and the second cluster set 60. The liquid cooling system is high in integration level and convenient to adjust and maintain on the pipeline on site.
In some examples, the first battery cluster set 50 and the second battery cluster set 60 each include a first battery cluster, a second battery cluster, a third battery cluster, a fourth battery cluster, and a fifth battery cluster, where the first battery cluster, the second battery cluster, the third battery cluster, the fourth battery cluster, and the fifth battery cluster are disposed at uniform intervals along the length direction of the energy storage container, and the junction of the second manifold 302 and the first manifold 301 is disposed directly intermediate the first battery cluster and the fifth battery cluster in the length direction of the energy storage container, that is, directly intermediate the third battery cluster in the length direction of the energy storage container.
In one possible embodiment, as shown in fig. 3, the liquid cooling system further includes a plurality of connection fittings 41, and one connection fitting 41 is connected to each of the branch liquid-feeding pipe 212 and each of the branch liquid-returning pipe 312 at an end thereof. Each of the liquid-feeding branch pipes 212 and each of the liquid-returning branch pipes 312 are communicated with the cooling pipes of the battery clusters through the connection tabs 41.
In one possible embodiment, as shown in fig. 2 and 3, the top end of the liquid return branch pipe 31 is provided with an exhaust valve 42, and the exhaust valve 42 is opened when the gas pressure at the top end of the liquid return branch pipe 31 is greater than the pressure threshold. The arrangement is beneficial to keeping the uniformity of the flow of the cooling liquid flowing into each battery pack and improving the safety of the liquid cooling system by removing the gas in the pipeline.
The embodiment of the invention provides an energy storage container, which comprises a plurality of battery clusters and a liquid cooling system; the battery cluster is provided with a cooling pipeline, and a liquid feeding branch pipe 21 and a liquid returning branch pipe 31 of the liquid cooling system are respectively communicated with the cooling pipeline of the battery cluster.
The liquid cooling system in this embodiment has the same structure as the liquid cooling system provided in any one of the above embodiments, and can bring about the same or similar technical effects, which are not described in detail herein, and specific reference may be made to the description of the above embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. The liquid cooling system is applied to an energy storage container, and the energy storage container comprises a plurality of battery clusters and is characterized by comprising a cooling unit, a liquid feeding pipe group and a liquid return pipe group;
the liquid delivery pipe group comprises a liquid delivery main pipe and a plurality of liquid delivery branch pipes, the liquid return pipe group comprises a liquid return main pipe and a plurality of liquid return branch pipes, the liquid delivery main pipe and the liquid return main pipe are respectively connected with the cooling unit, the liquid delivery main pipe is connected with the liquid delivery branch pipes, and the liquid return main pipe is connected with the liquid return branch pipes;
each liquid conveying branch pipe comprises a liquid conveying main pipe and a plurality of liquid conveying branch pipes, wherein the liquid conveying main pipes extend vertically, the bottom ends of the liquid conveying main pipes are communicated with the liquid conveying main pipe, the liquid conveying branch pipes are arranged at intervals along the length direction of the liquid conveying main pipe, and the inner diameters of the liquid conveying branch pipes are sequentially increased from the top ends of the liquid conveying main pipes to the bottom ends of the liquid conveying main pipes;
the liquid return main pipe comprises a first main pipe and a second main pipe, the first main pipe is connected with a plurality of liquid return branch pipes, the second main pipe is connected between the cooling unit and the first main pipe, a plurality of battery clusters corresponding to the first main pipe are sequentially arranged along the length direction of the energy storage container, and the joint of the second main pipe and the first main pipe is arranged in the middle of two battery clusters at two ends of the plurality of battery clusters corresponding to the first main pipe.
2. The liquid cooling system according to claim 1, wherein each of the liquid return branch pipes includes a liquid return main pipe extending vertically, a bottom end of the liquid return main pipe being communicated with the first main pipe, and a plurality of liquid return branch pipes arranged at intervals along a length direction of the liquid return main pipe, an inner diameter of each of the liquid return branch pipes being sequentially reduced from a top end of the liquid return main pipe toward a bottom end of the liquid feed main pipe.
3. The liquid cooling system according to claim 2, comprising two liquid feeding tube groups and two liquid return tube groups, wherein the two liquid feeding tube groups and the two liquid return tube groups are arranged at intervals in the width direction of the energy storage container, each liquid feeding tube group corresponds to one liquid return tube group, and the number of the battery clusters corresponding to the two liquid feeding tube groups is equal.
4. The liquid cooling system according to claim 3, wherein one second manifold of the two liquid return pipe groups is provided with a regulating valve configured to regulate a liquid return force of the corresponding second manifold.
5. The liquid cooling system according to claim 4, wherein a length of the second manifold provided with the regulator valve is smaller than a length of the second manifold not provided with the regulator valve.
6. The liquid cooling system according to claim 3, wherein the energy storage container includes a first battery cluster group and a second battery cluster group, each of the first battery cluster group and the second battery cluster group includes a plurality of the battery clusters, the number of battery clusters of the first battery cluster group is equal to the number of battery clusters of the second battery cluster group, the first battery cluster group and the second battery cluster group are arranged at intervals in a width direction of the energy storage container;
the two liquid feeding pipe groups and the two liquid return pipe groups are positioned between the first battery cluster group and the second battery cluster group.
7. The liquid cooling system of claim 2, further comprising a plurality of connection fittings, one at each end of the branch liquid feed conduit and each branch liquid return conduit.
8. The liquid cooling system of claim 1, wherein the first and second manifolds of the return manifold are in a common plane and the feed manifold is positioned below the return manifold in a height direction of the storage container.
9. The liquid cooling system according to any one of claims 1 to 8, wherein an exhaust valve is provided at a top end of the liquid return branch pipe, and the exhaust valve is opened when a gas pressure at the top end of the liquid return branch pipe is greater than a pressure threshold.
10. An energy storage container comprising a plurality of battery clusters and the liquid cooling system of any one of claims 1-9;
the battery cluster is provided with a cooling pipeline, and a liquid feeding branch pipe and a liquid returning branch pipe of the liquid cooling system are respectively communicated with the cooling pipeline of the battery cluster.
CN202311522091.0A 2023-11-15 2023-11-15 Liquid cooling system and energy storage container Pending CN117477096A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311522091.0A CN117477096A (en) 2023-11-15 2023-11-15 Liquid cooling system and energy storage container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311522091.0A CN117477096A (en) 2023-11-15 2023-11-15 Liquid cooling system and energy storage container

Publications (1)

Publication Number Publication Date
CN117477096A true CN117477096A (en) 2024-01-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311522091.0A Pending CN117477096A (en) 2023-11-15 2023-11-15 Liquid cooling system and energy storage container

Country Status (1)

Country Link
CN (1) CN117477096A (en)

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