Energy storage system liquid cooling pipeline with balanced heat dissipation

Abstract

The utility model provides an energy storage system liquid cooling pipeline with balanced heat dissipation, which comprises a battery cabin, a battery module, a liquid cooling machine and a liquid cooling pipeline, the battery module, the liquid cooling machine and the liquid cooling pipeline are all integrated in the battery cabin, and the liquid cooling pipeline comprises a main liquid inlet pipeline and a main liquid outlet pipeline. The main liquid inlet pipeline is composed of a first liquid inlet pipeline, a second liquid inlet pipeline and a third liquid inlet pipeline, the main liquid outlet pipeline is composed of a first liquid outlet pipeline, a second liquid outlet pipeline and a third liquid outlet pipeline, and a liquid inlet of the first liquid inlet pipeline is communicated with a liquid conveying opening of the liquid cooling machine. According to the utility model, through the reverse arrangement of the liquid cooling pipelines, the pressure and flow velocity balance of cooling liquid of the front-end battery cluster and the tail-end battery cluster can be realized by utilizing the difference of liquid inlet pressure and liquid return pressure positions of the liquid cooling machine; and meanwhile, the second liquid inlet pipeline, the third liquid inlet pipeline, the second liquid outlet pipeline and the third liquid outlet pipeline can exhaust gas in the liquid inlet and liquid return processes, and the gas exhaust efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a liquid cooling pipeline of an energy storage system with balanced heat dissipation. Background Art

[0002] In recent years, as the capacity of electrochemical energy storage systems has grown from 280Ah to 314Ah, the capacity of a single centralized energy storage battery compartment has also increased from 3.35MWh to 5MWh. The layout of each battery compartment has increased from 9 battery clusters to 12 battery clusters, and the heat dissipation requirements of the battery cells have also increased.

[0003] The life of the battery cell is closely related to the temperature. Excessive temperature will intensify the side reactions between the battery cell electrolyte and the positive and negative electrode materials, accelerate the consumption of the electrolyte, and thus reduce the life of the battery cell. Therefore, the temperature control of the battery cell is a key issue to be solved in the electrochemical energy storage system. With the gradual maturity of the development of liquid cooling technology, the heat dissipation solution of the energy storage system has gradually shifted from air cooling to liquid cooling. The liquid cooling solution has become the mainstream solution for the heat dissipation of the battery cell of the energy storage system. The liquid cooling solution has the advantages of high cooling efficiency, small footprint, and low overall cost, but there are also some problems at present:

[0004] 1. Centralized energy storage battery compartments generally consist of two rows of battery clusters, with the liquid cooler located at one end of the battery compartment. The primary liquid cooling pipeline is generally divided into two branches to deliver equal amounts of coolant to the two rows of battery clusters. The battery clusters farther away from the liquid cooler are located at the end of the pipeline for both liquid supply and return. The pressure at the end of the liquid cooling pipeline at the liquid inlet is low and the flow rate is slow, which ultimately causes uneven cell temperatures between different battery clusters in the battery compartment, and reduces the life of some cells with high temperatures.

[0005] 2. Liquid cooling pipelines are generally equipped with exhaust valves on the secondary liquid return pipelines. The air in the pipeline is injected with coolant, part of the air is discharged from the exhaust valve, and part of the air flows back to the liquid cooler with the coolant. It takes multiple cycles to exhaust the air in the pipeline, which is inefficient.

[0006] Therefore, in response to the above problems, we propose a liquid cooling pipeline for an energy storage system with balanced heat dissipation. Utility Model Content

[0007] The purpose of the utility model is to provide a liquid cooling pipeline for an energy storage system with balanced heat dissipation, so as to solve the problems raised by the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid cooling pipeline of an energy storage system with balanced heat dissipation, comprising a battery compartment, a battery module, a liquid cooler and a liquid cooling pipeline, wherein the battery module, the liquid cooler and the liquid cooling pipeline are all integrated inside the battery compartment, and the liquid cooling pipeline comprises a main liquid inlet pipeline and a main liquid outlet pipeline, wherein the main liquid inlet pipeline is composed of a first liquid inlet pipeline, a second liquid inlet pipeline and a third liquid inlet pipeline, and the main liquid outlet pipeline is composed of a first liquid outlet pipeline, a second liquid outlet pipeline and a third liquid outlet pipeline, wherein the liquid inlet of the first liquid inlet pipeline is connected to the liquid infusion port of the liquid cooler, and the liquid outlet of the first liquid outlet pipeline is connected to the liquid return port of the liquid cooler.

[0009] As a further description of the present invention: the number of the second liquid inlet pipes and the third liquid inlet pipes is several groups, the second liquid inlet pipes are equidistantly distributed on the first liquid inlet pipe, and the third liquid inlet pipes are equidistantly distributed on the second liquid inlet pipe.

[0010] As a further description of the present invention: the number of the second liquid outlet pipes and the third liquid outlet pipes is the same as the number of the second liquid inlet pipes and the third liquid inlet pipes, wherein the second liquid outlet pipes are equidistantly distributed on the first liquid outlet pipe.

[0011] As a further description of the present invention: an exhaust valve is installed at one end of the second liquid inlet pipe and the second liquid outlet pipe away from the first liquid inlet pipe and the first liquid outlet pipe.

[0012] As a further description of the present invention: a first liquid drain assembly is installed at one end of the first liquid inlet pipe away from the liquid cooler, and a second liquid drain assembly is installed at one end of the first liquid outlet pipe close to the liquid cooler.

[0013] As a further description of the present invention: the number of the battery clusters is multiple and they are evenly distributed inside the battery compartment. The battery cluster is composed of multiple groups of liquid cooling plates and battery packs, wherein the liquid cooling plate is provided with a liquid cooling inlet and outlet.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model realizes balanced pressure and flow rate of coolant of the front-end battery cluster and the terminal battery cluster by reverse arrangement of the liquid cooling pipes and utilizing the difference in the positions of the liquid inlet pressure and the liquid return pressure of the liquid cooler. Meanwhile, the second liquid inlet pipe, the third liquid inlet pipe, the second liquid outlet pipe and the third liquid outlet pipe can exhaust gas during the liquid inlet and liquid return processes, and the exhaust efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a layout diagram of the battery compartment of the energy storage system of the utility model;

[0017] Figure 2This is a schematic diagram of the connection structure between the battery module and the liquid cooling pipeline of the utility model;

[0018] Figure 3 This is a schematic diagram of the liquid cooling pipeline structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the first pipeline structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the second and third pipeline structures of the utility model.

[0021] In the figure: 1. battery compartment; 2. battery module; 3. liquid cooler; 4. liquid cooling pipe; 5. main liquid inlet pipe; 6. main liquid outlet pipe; 7. first liquid inlet pipe; 8. second liquid inlet pipe; 9. third liquid inlet pipe; 10. first liquid outlet pipe; 11. second liquid outlet pipe; 12. third liquid outlet pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5 The utility model provides a technical solution: a liquid cooling pipeline of an energy storage system with balanced heat dissipation, comprising a battery compartment 1, a battery module 2, a liquid cooler 3 and a liquid cooling pipeline 4, wherein the battery module 2, the liquid cooler 3 and the liquid cooling pipeline 4 are all integrated inside the battery compartment 1, and the liquid cooling pipeline 4 comprises a main liquid inlet pipeline 5 and a main liquid outlet pipeline 6, wherein the main liquid inlet pipeline 5 is composed of a first liquid inlet pipeline 7, a second liquid inlet pipeline 8 and a third liquid inlet pipeline 9, and the main liquid outlet pipeline 6 is composed of a first liquid outlet pipeline 10, a second liquid outlet pipeline 11 and a third liquid outlet pipeline 12, and the liquid inlet of the first liquid inlet pipeline 7 is connected to the liquid infusion port of the liquid cooler 3, and the liquid outlet of the first liquid outlet pipeline 10 is connected to the liquid return port of the liquid cooler 3.

[0024] In this embodiment, the number of the second liquid inlet pipes 8 and the third liquid inlet pipes 9 is several groups, the second liquid inlet pipes 8 are equidistantly distributed on the first liquid inlet pipes 7 , and the third liquid inlet pipes 9 are equidistantly distributed on the second liquid inlet pipes 8 .

[0025] During specific use: the first liquid inlet pipeline 7 is connected to the second liquid inlet pipeline 8 through a three-way joint and an angle valve, and the second liquid inlet pipeline 8 is connected to the third liquid inlet pipeline 9 through a three-way joint, so as to transport the coolant inside the liquid cooler 3 to the battery module 2.

[0026] In this embodiment: the number of the second liquid outlet pipes 11 and the third liquid outlet pipes 12 is the same as the number of the second liquid inlet pipes 8 and the third liquid inlet pipes 9, wherein the second liquid outlet pipes 11 are equidistantly distributed on the first liquid outlet pipe 10, and the third liquid outlet pipes 12 are equidistantly distributed on the second liquid outlet pipe 11.

[0027] During specific use: the third liquid outlet pipe 12 is connected to the second liquid outlet pipe 11 through a three-way joint, and the second liquid outlet pipe 11 is connected to the first liquid outlet pipe 10 through a one-way valve, an angle valve and a three-way joint, so that the coolant can flow back to the liquid cooler 3, wherein the one-way valve connected to the second liquid outlet pipe 11 can be used to discharge the coolant inside the second liquid outlet pipe 11 and the third liquid outlet pipe 12 when replacing the electrical module.

[0028] In this embodiment, an exhaust valve is installed at one end of the second liquid inlet pipe 8 and the second liquid outlet pipe 11 away from the first liquid inlet pipe 7 and the first liquid outlet pipe 10 .

[0029] When used specifically: the design of the exhaust valve can realize exhaust of the second liquid inlet pipeline 8, the third liquid inlet pipeline 9, the second liquid outlet pipeline 11 and the third liquid outlet pipeline 12 during the liquid inlet and liquid return processes, and the exhaust efficiency is high.

[0030] In this embodiment, a first liquid drain assembly is installed at one end of the first liquid inlet pipe 7 away from the liquid cooler 3 , and a second liquid drain assembly is installed at one end of the first liquid outlet pipe 10 close to the liquid cooler 3 .

[0031] When used specifically: the first liquid drain assembly and the second liquid drain assembly can quickly drain the coolant in the liquid cooling pipe 4 when the coolant is replaced, and can also be used for air tightness testing after the pipe is installed.

[0032] In this embodiment, the battery modules 2 are in multiple groups and are evenly distributed inside the battery compartment 1. The battery modules 2 are composed of multiple groups of liquid cooling plates and battery packs, wherein the liquid cooling plates are provided with liquid cooling inlets and outlets.

[0033] During specific use: the liquid cooling inlet and outlet are used to connect the third liquid inlet pipe 9 and the third liquid outlet pipe 12 .

[0034] Working principle: When in use, the coolant is transported from the liquid cooler 3 to the first liquid inlet pipe 7, the second liquid inlet pipe 8 and the third liquid inlet pipe 9 to the liquid cooling plate to cool the battery pack, and then flows back to the liquid cooler 3 through the third liquid outlet pipe 12, the second liquid outlet pipe 11 and the first liquid outlet pipe 10 to achieve circulation. The reverse arrangement of the liquid cooling pipe 4 can utilize the different positions of the liquid inlet pressure and the liquid return pressure of the liquid cooler 3 to achieve balanced pressure and flow rate of the coolant in the front-end battery module 2 and the terminal battery module 2. The design of the exhaust valve can achieve exhaust from the second liquid inlet pipe 8, the third liquid inlet pipe 9, the second liquid outlet pipe 11 and the third liquid outlet pipe 12 during the liquid inlet and liquid return processes, and the exhaust efficiency is high.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for technical personnel in the field to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid cooling pipeline for an energy storage system with balanced heat dissipation, comprising a battery compartment (1), a battery module (2), a liquid cooling machine (3) and a liquid cooling pipeline (4), characterized in that: The battery module (2), the liquid cooling machine (3) and the liquid cooling pipeline (4) are all integrated inside the battery compartment (1); the liquid cooling pipeline (4) comprises a main liquid inlet pipeline (5) and a main liquid outlet pipeline (6); the main liquid inlet pipeline (5) is composed of a first liquid inlet pipeline (7), a second liquid inlet pipeline (8) and a third liquid inlet pipeline (9); and the main liquid outlet pipeline (6) is composed of a first liquid outlet pipeline (10), a second liquid outlet pipeline (11) and a third liquid outlet pipeline (12); the liquid inlet of the first liquid inlet pipeline (7) is connected to the liquid inlet of the liquid cooling machine (3), and the liquid outlet of the first liquid outlet pipeline (10) is connected to the liquid return port of the liquid cooling machine (3).

2. The heat dissipation balanced energy storage system liquid cooling pipeline according to claim 1, characterized in that: The number of the second liquid inlet pipes (8) and the third liquid inlet pipes (9) is a plurality of groups, the second liquid inlet pipes (8) are equidistantly distributed on the first liquid inlet pipes (7), and the third liquid inlet pipes (9) are equidistantly distributed on the second liquid inlet pipes (8).

3. The liquid cooling pipeline of the energy storage system with balanced heat dissipation according to claim 1 is characterized in that: The number of the second liquid outlet pipes (11) and the third liquid outlet pipes (12) is the same as the number of the second liquid inlet pipes (8) and the third liquid inlet pipes (9), wherein the second liquid outlet pipes (11) are equidistantly distributed on the first liquid outlet pipe (10), and the third liquid outlet pipes (12) are equidistantly distributed on the second liquid outlet pipe (11).

4. The heat dissipation balanced energy storage system liquid cooling pipeline according to claim 1, characterized in that: An exhaust valve is installed at one end of the second liquid inlet pipe (8) and the second liquid outlet pipe (11) away from the first liquid inlet pipe (7) and the first liquid outlet pipe (10).

5. The liquid cooling pipeline of the energy storage system with balanced heat dissipation according to claim 1, characterized in that: A first liquid drain assembly is installed at one end of the first liquid inlet pipe (7) away from the liquid cooler (3), and a second liquid drain assembly is installed at a side wall of one end of the first liquid outlet pipe (10) close to the liquid cooler (3).

6. The heat dissipation balanced energy storage system liquid cooling pipeline according to claim 1, characterized in that: The battery modules (2) are provided in a plurality of groups and are evenly spaced within the battery compartment (1); the battery modules (2) are composed of a plurality of groups of liquid cooling plates and battery packs, wherein the liquid cooling plates are provided with a liquid cooling inlet and an outlet.

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