Liquid cooling energy storage mechanism

Abstract

The utility model discloses a liquid cooling energy storage mechanism in the technical field of energy storage, which comprises a high-voltage box, a battery PACK, a PCS liquid cooling module and a plate heat exchanger, the battery PACK comprises a plurality of battery modules, the PCS liquid cooling module comprises a PCS electrical cabin and a PCS heat exchange plate, cooling liquid and an evaporator immersed in the cooling liquid are arranged in each battery module, and the plate heat exchanger is arranged in the PCS electrical cabin. Due to the fact that the evaporator is immersed in the cooling liquid of the battery module, the heat of the battery cells exchanges heat with the cooling liquid, and the cooling liquid exchanges heat with the evaporator, the heat exchange efficiency can be greatly improved, the efficiency of an energy storage system is improved, the charging and discharging multiplying power is greatly improved, meanwhile, the heat dissipation efficiency is remarkably improved, and the service life of the battery module is prolonged. The working temperature of the battery module is effectively controlled within a suitable range, the service life of the battery module is prolonged, the reliability and stability of the system are enhanced, and the fault risk caused by too high temperature is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a liquid cooling energy storage mechanism. Background Art

[0002] The energy storage system is equipped with multiple groups of battery clusters arranged side by side. Each battery cluster is composed of multiple battery modules. The battery modules generate a certain amount of heat during operation. To ensure the normal operation of each battery module, the energy storage system is usually equipped with liquid cooling pipelines. The liquid cooling pipelines pass coolant to cool each battery module. Since the battery system in the energy storage system has a uniform temperature, the flow distribution of the liquid cooling pipeline is usually relatively balanced to ensure that the coolant in the liquid cooling pipeline is evenly distributed to each battery module, ensuring the consistency of the temperature reduction of each battery module.

[0003] With the widespread application of renewable energy and the growing demand for energy storage in power systems, the performance and efficiency of energy storage systems have become key issues. Among the many energy storage technologies, liquid-cooled energy storage systems have gradually gained attention due to their excellent heat dissipation performance and stability. However, most existing energy storage mechanisms use air cooling, which has low heat exchange efficiency, resulting in low energy storage system efficiency and low charge and discharge rates. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technical solutions, the utility model provides a liquid-cooled energy storage mechanism, which can effectively solve the technical problem that most of the existing energy storage mechanisms adopt an air-cooled heat dissipation mode, which has low heat exchange efficiency, resulting in low energy storage system efficiency and low charge and discharge rates.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a liquid-cooled energy storage mechanism, including a high-voltage box, a battery PACK, a PCS liquid cooling module and a plate heat exchanger, the battery PACK includes multiple battery modules, the PCS liquid cooling module includes a PCS electrical compartment and a PCS heat exchange plate, a first refrigerant circulation pipe and a second refrigerant circulation pipe are provided between the battery PACK and the plate heat exchanger, each of the battery modules is provided with a coolant and an evaporator immersed in the coolant, and each evaporator is externally connected to an air pipe and a liquid pipe, a first cooling water circulation pipe and a second cooling water circulation pipe are provided between the plate heat exchanger and the PCS liquid cooling module, each liquid pipe is connected to the first refrigerant circulation pipe, and each air pipe is connected to the second refrigerant circulation pipe.

[0006] Preferably, an electronic expansion valve is provided at one end of the first refrigerant circulation pipe close to the plate heat exchanger, and the second refrigeration circulation pipe is connected to a refrigeration unit.

[0007] Preferably, the first cooling water circulation pipe is provided with a group of liquid outlet pipes in communication therewith, and the group of liquid outlet pipes are respectively connected to the PCS heat exchange plate and the plate heat exchanger.

[0008] Preferably, the battery PACK is provided with an EMS controller for monitoring its voltage and temperature.

[0009] Preferably, the second cooling water circulation pipe is provided with a group of liquid inlet pipes communicating therewith, and the group of liquid inlet pipes are respectively connected to the PCS heat exchange plate and the plate heat exchanger.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The plate heat exchanger replaces the traditional air-cooling heat dissipation mode, so the air duct problem can be ignored and the floor space is reduced. The outlet of the compressor is connected to the inlet of the plate heat exchanger through the second refrigerant circulation pipe, and the outlet of the plate heat exchanger is connected to the inlet of the evaporator through the first refrigerant circulation pipe. The outlet of the evaporator is connected to the inlet of the compressor. Since the evaporator is immersed in the coolant of the battery module, the heat of the battery cell is exchanged with the coolant, and the coolant is exchanged with the evaporator. Therefore, the heat exchange efficiency can be greatly improved, thereby improving the efficiency of the energy storage system and further improving the charge and discharge rate. At the same time, the heat dissipation efficiency is significantly improved, and the operating temperature of the battery module is effectively controlled within an appropriate range, which extends the service life of the battery module, enhances the reliability and stability of the system, and reduces the risk of failure caused by excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of a liquid-cooled energy storage mechanism of the utility model;

[0013] Figure 2 This is a working flow diagram of a liquid-cooled energy storage mechanism of the utility model.

[0014] Numbers in the figure:

[0015] 1-PCS electrical compartment, 2-PCS heat exchange plate, 3-second refrigerant circulation pipe, 4-electronic expansion valve, 5-first refrigerant circulation pipe, 6-liquid pipe, 7-gas pipe, 8-EMS controller, 9-high-pressure box, 10-battery module, 11-evaporator, 12-plate heat exchanger, 13-liquid inlet pipe, 14-second cooling water circulation pipe, 15-first cooling water circulation pipe, 16-liquid outlet pipe. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] like Figure 1-2 As shown, the utility model provides a liquid-cooled energy storage mechanism, including a high-voltage box 9, a battery PACK, a PCS liquid cooling module and a plate heat exchanger 12, wherein the battery PACK includes a plurality of battery modules 10, the PCS liquid cooling module includes a PCS electrical compartment 1 and a PCS heat exchange plate 2, a first refrigerant circulation pipe 5 and a second refrigerant circulation pipe 3 are provided between the battery PACK and the plate heat exchanger 12, each of the battery modules 10 is provided with a coolant and an evaporator 11 immersed in the coolant, and each evaporator 11 is externally connected to an air pipe 7 and a liquid pipe 6, a first cooling water circulation pipe 15 and a second cooling water circulation pipe 3 are provided between the plate heat exchanger 12 and the PCS liquid cooling module Tube 14, each liquid pipe 6 is connected to the first refrigerant circulation pipe 5, each gas pipe 7 is connected to the second refrigerant circulation pipe 3, the first refrigerant circulation pipe 5 is provided with an electronic expansion valve 4 at one end close to the plate heat exchanger 12, the second refrigeration circulation pipe is connected to a refrigeration unit, the first cooling water circulation pipe 15 is provided with a group of liquid outlet pipes 16 connected thereto, a group of said liquid outlet pipes 16 are respectively connected to the PCS heat exchange plate 2 and the plate heat exchanger 12, the battery PACK is provided with an EMS controller 8 for monitoring its voltage and temperature, the second cooling water circulation pipe 14 is provided with a group of liquid inlet pipes 13 connected thereto, a group of said liquid inlet pipes 13 are respectively connected to the PCS heat exchange plate 2 and the plate heat exchanger 12.

[0018] Compared with traditional technology: the plate heat exchanger 12 replaces the traditional air-cooling heat dissipation mode, so the air duct problem can be ignored and the floor space is reduced. The outlet of the compressor is connected to the inlet of the plate heat exchanger 12 through the second refrigerant circulation pipe 3, and the outlet of the plate heat exchanger 12 is connected to the inlet of the evaporator 11 through the first refrigerant circulation pipe 5. The outlet of the evaporator 11 is connected to the inlet of the compressor. Since the evaporator 11 is immersed in the coolant of the battery module 10, the heat of the battery cell is exchanged with the coolant, and the coolant is exchanged with the evaporator 11. Therefore, the heat exchange efficiency can be greatly improved, thereby improving the efficiency of the energy storage system and further improving the charge and discharge rate. At the same time, the heat dissipation efficiency is significantly improved, and the operating temperature of the battery module 10 is effectively controlled within an appropriate range, thereby extending the service life of the battery module 10, enhancing the reliability and stability of the system, and reducing the risk of failure caused by excessive temperature.

[0019] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A liquid-cooled energy storage mechanism, comprising a high-voltage box, a battery pack, a PCS liquid cooling module, and a plate heat exchanger, wherein the battery pack comprises a plurality of battery modules, characterized in that: The PCS liquid cooling module includes a PCS electrical compartment and a PCS heat exchange plate. A first refrigerant circulation pipe and a second refrigerant circulation pipe are provided between the battery PACK and the plate heat exchanger. Each battery module is provided with coolant and an evaporator immersed in the coolant, and each evaporator is externally connected to an air pipe and a liquid pipe. A first cooling water circulation pipe and a second cooling water circulation pipe are provided between the plate heat exchanger and the PCS liquid cooling module. Each liquid pipe is connected to the first refrigerant circulation pipe, and each air pipe is connected to the second refrigerant circulation pipe.

2. A liquid-cooled energy storage mechanism according to claim 1, characterized in that: An electronic expansion valve is provided at one end of the first refrigerant circulation pipe close to the plate heat exchanger, and the second refrigerant circulation pipe is connected to a refrigeration unit.

3. The liquid-cooled energy storage mechanism according to claim 1, characterized in that: The first cooling water circulation pipe is provided with a group of liquid outlet pipes in communication therewith, and the group of liquid outlet pipes are respectively connected to the PCS heat exchange plate and the plate heat exchanger.

4. The liquid-cooled energy storage mechanism according to claim 1, characterized in that: The battery pack is provided with an EMS controller for monitoring its voltage and temperature.

5. The liquid-cooled energy storage mechanism according to claim 1, characterized in that: The second cooling water circulation pipe is provided with a group of liquid inlet pipes communicating therewith, and the group of liquid inlet pipes are respectively connected to the PCS heat exchange plate and the plate heat exchanger.

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