Liquid cooling energy storage container system for supplying heat by internal combustion engine

Abstract

According to the liquid cooling energy storage container system for supplying heat through the internal combustion engine, the internal combustion engine and liquid cooling energy storage are combined, and the liquid cooling energy storage container system has the advantages of being high in energy efficiency, convenient to deploy, stable in temperature control and high in adaptability. The internal combustion engine power generation module comprises an internal combustion engine and a power generator; the heat recovery and water mixing module comprises a heat exchange assembly, a cold water input pipeline, a hot water output pipeline, a water mixing tank and a cooling liquid storage tank, the cooling liquid storage tank comprises an inner-layer medium placement area and an outer-layer heat preservation and heat exchange interlayer, and cooling liquid is placed in the inner-layer medium placement area; the liquid cooling energy storage battery array module is formed by connecting a plurality of groups of liquid cooling battery units in series and in parallel; cooling liquid is driven by a circulating pump to flow through an internal heat exchange channel of each group of liquid-cooled battery units, a water inlet and a water outlet of each group of liquid-cooled battery units are respectively provided with a temperature sensor, and the temperature sensors feed back to the intelligent control system; an intelligent control system; and a container integrated packaging structure.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-cooled energy storage systems, and specifically to a liquid-cooled energy storage container system that utilizes an internal combustion engine for heating. Background Art

[0002] Liquid-cooled energy storage systems operating in cold regions have low initial battery temperatures, resulting in insufficient discharge capacity and difficulty starting the system. Existing solutions generally use electric heaters to increase the temperature, but this consumes additional energy and reduces overall system efficiency. This is especially true in off-grid applications, where initial power is limited. Heating priority and energy efficiency become key constraints.

[0003] Currently, most internal combustion engine power generation systems focus solely on electrical output, failing to fully utilize the high-temperature exhaust gases and waste heat from cooling water, resulting in significant energy waste. At the same time, with the widespread adoption of liquid-cooled energy storage batteries, their reliance on thermal management systems is increasing. Maintaining a stable battery temperature is crucial for extending battery life and safety, especially in off-grid scenarios.

[0004] Therefore, how to reasonably arrange the internal combustion engine power generation system in combination with the liquid-cooled energy storage system to improve thermal energy utilization is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] To address the above problems, the present invention provides a liquid-cooled energy storage container system that uses an internal combustion engine for heating. It combines an internal combustion engine and liquid-cooled energy storage. It has the advantages of high energy efficiency, convenient deployment, stable temperature control and strong adaptability. It is suitable for off-grid energy storage stations, data centers and industrial energy recovery scenarios.

[0006] A liquid-cooled energy storage container system using an internal combustion engine for heating, characterized in that it comprises:

[0007] An internal combustion engine power generation module, which includes an internal combustion engine and a generator;

[0008] The heat recovery and water mixing module includes a heat exchange component, a cold water input pipeline, a hot water output pipeline, a mixing water tank, and a coolant storage tank. The coolant storage tank includes an inner medium placement area and an outer thermal insulation and heat exchange insulation layer. The coolant is placed in the inner medium placement area. The liquid outlet of the inner medium is provided with a first NTC temperature sensor. The hot water output pipeline is connected to a first proportional valve and then connected to the mixing water tank. The mixing water tank is also provided with a cold water inlet. The cold water is connected to the cold water inlet after passing through a second proportional valve. The output port of the mixing water tank is connected to a water pump and then connected to the outer thermal insulation and heat exchange insulation layer.

[0009] The liquid-cooled energy storage battery array module consists of several groups of liquid-cooled battery cells arranged in series and parallel. The coolant is driven by a circulating pump to flow through the internal heat exchange channels of each group of liquid-cooled battery cells. Temperature sensors are installed at the water inlet and outlet of each group of liquid-cooled battery cells, and the temperature sensors provide feedback to the intelligent control system.

[0010] Intelligent control system;

[0011] and a container-integrated packaging structure;

[0012] The internal combustion engine power generation module, heat recovery and water mixing module, liquid-cooled energy storage battery array module, and intelligent control system are all arranged in the inner cavity of the integrated packaging structure of the container. The water outlet of the outer thermal insulation and heat exchange insulation layer is the cold water input pipeline. The cold water input pipeline is connected to the heat exchange component as the heat exchange medium inlet. The outlet of the heat exchange component is connected to the hot water output pipeline as the heat exchange medium outlet. The intelligent control system controls the flow rate of hot water and cold water entering the mixing tank so that the coolant output from the output port of the inner medium placement area reaches the set temperature output for controlling the battery temperature.

[0013] It is further characterized by:

[0014] The fuel enters the internal combustion engine to drive the generator to generate electricity. The power output of the generator is supplied to an external load or used to charge the batteries in the liquid-cooled energy storage battery array module.

[0015] The heat exchange assembly includes a flue gas heat exchanger and a plate heat exchanger. The exhaust port of the internal combustion engine is connected to the gas inlet of the flue gas heat exchanger. The cooling water with waste heat from the internal combustion engine is connected to the plate heat exchanger and then flows back into the internal combustion engine for further cooling. The water flowing out of the outer thermal insulation and heat exchange insulation layer through the cold water input pipeline passes through the corresponding medium pipelines of the flue gas heat exchanger and the plate heat exchanger arranged in series and is then connected to the hot water output pipeline, so that the cold water absorbs the waste heat of the flue gas and the waste heat of the cooling water respectively.

[0016] The hot water output pipeline is provided with a hot water outlet flange, and the residual hot water diverted by the first proportional valve flows out through the hot water outlet flange for external use or temporary storage;

[0017] The input end of the cold water input pipeline is provided with a third proportional valve and a cold water outlet flange. The cold water outlet flange diverts the cold water that does not enter the heat exchange component through the third proportional valve and transmits it to the outside or a cold water backup container to ensure that water resources and heat energy are reliably utilized.

[0018] The intelligent control system includes a PLC controller and an EMS control system. The temperature sensors of the water inlet and outlet of each group of liquid-cooled battery units are connected to the EMS control system via a CAN bus. The EMS control system is connected to the PLC controller via a communication line. The PLC controller is connected to the NTC temperature sensor of each heat exchanger, the first proportional valve, the second proportional valve, the third proportional valve, the first NTC temperature sensor of the output port of the inner layer medium placement area, and the water pump via a communication line.

[0019] The output port of the inner medium placement area is connected to the medium input channel of the liquid-cooled energy storage battery array module through an internal circulation pump, and the medium output channel of the liquid-cooled energy storage battery array module is connected to the reflux port of the inner medium placement area.

[0020] With this invention, exhaust and cooling water generated during the power generation process of the internal combustion engine are recycled through a heat exchanger to produce hot water. This water is then mixed with cold water in a mixing system as needed to create constant-temperature circulating water. This water is then pumped to the liquid-cooled energy storage battery array module to achieve battery temperature control. The system utilizes an intelligent control system to manage the operation of various components, enabling intelligent water temperature regulation, battery temperature monitoring, and early warning. It boasts high energy efficiency, easy deployment, stable temperature control, and strong adaptability, making it suitable for off-grid energy storage stations, data centers, and industrial energy recovery scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 for Figure 1 A local enlarged schematic diagram of point A;

[0023] The names corresponding to the serial numbers in the figure are as follows:

[0024] Flue gas heat exchanger 10, plate heat exchanger 20, hot water outlet flange 30, cold water outlet flange 40, internal circulation pump 50;

[0025] Heat recovery and water mixing module 100, cold water input pipeline 101, hot water output pipeline 102, mixing tank 103, coolant storage tank 104, first NTC temperature sensor 105, first proportional valve 106, second proportional valve 107, water pump 108, third proportional valve 109, internal combustion engine power generation module 200, internal combustion engine 201, generator 202, liquid-cooled energy storage battery array module 300, liquid-cooled battery unit 301, intelligent control system 400. DETAILED DESCRIPTION

[0026] A liquid-cooled energy storage container system using an internal combustion engine for heating, see Figure 1-Figure 2 , which includes:

[0027] Heat recovery and water mixing module 100, internal combustion engine power generation module 200, liquid-cooled energy storage battery array module 300, intelligent control system 400, and a container integrated packaging structure (not shown in the figure, belonging to the existing mature container structure);

[0028] The heat recovery and water mixing module 100 includes a heat exchange component, a cold water input pipeline 101, a hot water output pipeline 102, a mixing water tank 103, and a coolant storage tank 104. The coolant storage tank 104 includes an inner medium placement area and an outer thermal insulation and heat exchange insulation layer. The coolant is placed in the inner medium placement area. The liquid outlet of the inner medium is provided with a first NTC temperature sensor 105. The hot water output pipeline 102 is connected to a first proportional valve 106 and then connected to the mixing water tank 103. The mixing water tank 103 is also provided with a cold water inlet. The cold water is connected to the cold water inlet after passing through a second proportional valve 107. The output port of the mixing water tank 103 is connected to a water pump 108 and then connected to the outer thermal insulation and heat exchange insulation layer.

[0029] The internal combustion engine power generation module 200 includes an internal combustion engine 201 and a generator 202;

[0030] The liquid-cooled energy storage battery array module 300 consists of several groups of liquid-cooled battery cells 301 arranged in series and parallel. The coolant is driven by a circulation pump to flow through the internal heat exchange channel of each group of liquid-cooled battery cells 301. Temperature sensors are installed at the water inlet and outlet of each group of liquid-cooled battery cells 301, and the temperature sensors provide feedback to the intelligent control system.

[0031] The internal combustion engine power generation module 100, the heat recovery and water mixing module 200, the liquid-cooled energy storage battery array module 300, and the intelligent control system 400 are all arranged in the inner cavity of the integrated packaging structure of the container. The water outlet of the outer thermal insulation and heat exchange layer is the cold water input pipeline 101. The cold water input pipeline 101 is connected to the heat exchange component as the heat exchange medium inlet, and the outlet of the heat exchange component is connected to the hot water output pipeline 102 as the heat exchange medium outlet. The intelligent control system 400 controls the flow of hot water and cold water entering the mixing tank 103 so that the coolant output from the output port of the inner medium placement area reaches the set temperature output for controlling the battery temperature.

[0032] In a specific embodiment, fuel enters the internal combustion engine 201 to drive the generator 202 to generate electricity. The power output of the generator 202 is supplied to an external load or used to charge the batteries in the liquid-cooled energy storage battery array module 300.

[0033] The heat exchange component includes a flue gas heat exchanger 10 and a plate heat exchanger 20. The exhaust port of the internal combustion engine 201 is connected to the gas inlet of the flue gas heat exchanger 10. The cooling water with waste heat of the internal combustion engine 201 is connected to the plate heat exchanger 20 and then flows back to the internal combustion engine 201 for cooling again. The water flowing out from the outer thermal insulation and heat exchange insulation layer through the cold water input pipeline 101 passes through the corresponding medium pipelines of the plate heat exchanger 20 and the flue gas heat exchanger 10 arranged in series and is then connected to the hot water output pipeline 102, which allows the cold water to absorb the waste heat of the flue gas and the waste heat of the cooling water respectively.

[0034] In a specific implementation, a hot water outlet flange 30 is provided on the hot water output pipeline 102, and the residual hot water diverted by the first proportional valve 106 flows out through the hot water outlet flange 30 for external use or temporary storage;

[0035] The input end of the cold water input pipeline 101 is provided with a third proportional valve 109 and a cold water outlet flange 40. The cold water outlet flange 40 diverts the cold water that does not enter the heat exchange component through the third proportional valve 109 and transmits it to the outside or a cold water backup container to ensure the reliable utilization of water resources and heat energy.

[0036] The intelligent control system 400 includes a PLC controller and an EMS control system. The temperature sensors of the water inlet and outlet of each group of liquid-cooled battery units 301 are connected to the EMS control system via a CAN bus. The EMS control system is connected to the PLC controller via a 485 communication line. The PLC controller is connected to the NTC temperature sensor of each heat exchanger, the first proportional valve 106, the second proportional valve 107, the third proportional valve 109, the first NTC temperature sensor 105 at the output port of the inner medium placement area, and the water pump 108 via communication lines.

[0037] The output port of the inner medium placement area is connected to the medium input channel of the liquid-cooled energy storage battery array module 300 through the internal circulation pump 50, and the medium output channel of the liquid-cooled energy storage battery array module 300 is connected to the return port of the inner medium placement area.

[0038] The exhaust and cooling water generated by the internal combustion engine during power generation are recycled through a heat exchanger, producing hot water. This water is then mixed with cold water as needed in a water mixing system to create a constant-temperature circulating water system. This water is then pumped to the liquid-cooled energy storage battery array module to achieve temperature control. The system utilizes an intelligent control system to manage the operation of various components, enabling intelligent water temperature regulation, battery temperature monitoring, and early warning. The system boasts high energy efficiency, easy deployment, stable temperature control, and strong adaptability, making it suitable for off-grid energy storage stations, data centers, and industrial energy recovery scenarios.

[0039] During specific implementation, all modules are encapsulated in 20 / 40-foot containers; they are equipped with tracks, pipe racks, cable trays and thermal insulation layers; and they support rapid deployment, lifting, and mobile transfer.

[0040] When the heat energy is no longer needed, the excess hot water is output and more cold water is introduced into the mixing tank to keep the coolant warm.

[0041] In specific implementation, the coolant used to cool the battery is 50% water + 50% ethylene glycol. The coolant is reliably insulated by the constant temperature water of the outer insulation and heat exchange insulation layer, ensuring that the battery operates safely and efficiently under the set temperature environment.

[0042] In specific implementation, the plate heat exchanger 20 can be replaced by a shell and tube or fin heat exchanger; the PLC controller in the intelligent control system 400 can be replaced by a PID temperature control module, and the control method can be replaced by an embedded industrial PC + LoRa wireless communication system instead of PLC+EMS.

[0043] After adopting the present invention, it has the following beneficial effects:

[0044] The comprehensive energy utilization rate is improved, and waste heat is effectively recovered for energy storage and temperature control;

[0045] Reduce independent heating / cooling energy consumption and lower system operation power consumption;

[0046] The integrated modular design facilitates transportation and deployment, making it suitable for field, emergency, and mobile applications.

[0047] Intelligent control ensures stable temperature of energy storage batteries and improves the life and safety of energy storage systems;

[0048] It is compatible with a variety of internal combustion engine generator sets and has wide adaptability.

[0049] 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 invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the 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 included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0050] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A liquid-cooled energy storage container system using an internal combustion engine for heating, characterized in that: It includes: An internal combustion engine power generation module, which includes an internal combustion engine and a generator; The heat recovery and water mixing module includes a heat exchange component, a cold water input pipeline, a hot water output pipeline, a mixing water tank, and a coolant storage tank. The coolant storage tank includes an inner medium placement area and an outer thermal insulation and heat exchange insulation layer. The coolant is placed in the inner medium placement area. The liquid outlet of the inner medium is provided with a first NTC temperature sensor. The hot water output pipeline is connected to a first proportional valve and then connected to the mixing water tank. The mixing water tank is also provided with a cold water inlet. The cold water is connected to the cold water inlet after passing through a second proportional valve. The output port of the mixing water tank is connected to a water pump and then connected to the outer thermal insulation and heat exchange insulation layer. The liquid-cooled energy storage battery array module consists of several groups of liquid-cooled battery cells arranged in series and parallel. The coolant is driven by a circulating pump to flow through the internal heat exchange channels of each group of liquid-cooled battery cells. Temperature sensors are installed at the water inlet and outlet of each group of liquid-cooled battery cells, and the temperature sensors provide feedback to the intelligent control system. Intelligent control system; and a container-integrated packaging structure; The internal combustion engine power generation module, heat recovery and water mixing module, liquid-cooled energy storage battery array module, and intelligent control system are all arranged in the inner cavity of the integrated packaging structure of the container. The water outlet of the outer thermal insulation and heat exchange insulation layer is the cold water input pipeline. The cold water input pipeline is connected to the heat exchange component as the heat exchange medium inlet. The outlet of the heat exchange component is connected to the hot water output pipeline as the heat exchange medium outlet. The intelligent control system controls the flow rate of hot water and cold water entering the mixing tank so that the coolant output from the output port of the inner medium placement area reaches the set temperature output for controlling the battery temperature.

2. The liquid-cooled energy storage container system using an internal combustion engine for heating according to claim 1, characterized in that: Fuel enters the internal combustion engine to drive the generator to generate electricity. The power output of the generator is supplied to an external load or used to charge the batteries in the liquid-cooled energy storage battery array module.

3. The liquid-cooled energy storage container system using an internal combustion engine for heating according to claim 2, characterized in that: The heat exchange assembly includes a flue gas heat exchanger and a plate heat exchanger. The exhaust port of the internal combustion engine is connected to the gas path inlet of the flue gas heat exchanger. The cooling water with waste heat of the internal combustion engine is connected to the plate heat exchanger and then flows back into the internal combustion engine for cooling again. The water flowing out from the outer thermal insulation and heat exchange insulation layer through the cold water input pipeline passes through the corresponding medium pipelines of the flue gas heat exchanger and the plate heat exchanger arranged in series and is then connected to the hot water output pipeline, which allows the cold water to absorb the waste heat of the flue gas and the waste heat of the cooling water respectively.

4. The liquid-cooled energy storage container system using an internal combustion engine for heating according to claim 1, characterized in that: The hot water output pipeline is provided with a hot water outlet flange, and the residual hot water diverted by the first proportional valve flows out through the hot water outlet flange for external use or temporary storage.

5. The liquid-cooled energy storage container system using an internal combustion engine for heating according to claim 4, characterized in that: The input end of the cold water input pipeline is provided with a third proportional valve and a cold water outlet flange. The cold water outlet flange diverts the cold water that does not enter the heat exchange component through the third proportional valve and transmits it to the outside or a cold water standby container.

6. The liquid-cooled energy storage container system using an internal combustion engine for heating according to claim 5, characterized in that: The intelligent control system includes a PLC controller and an EMS control system. The temperature sensors of the water inlet and outlet of each group of liquid-cooled battery units are connected to the EMS control system through a CAN bus. The EMS control system is connected to the PLC controller through a communication line. The PLC controller is connected to the NTC temperature sensor of each heat exchanger, the first proportional valve, the second proportional valve, the third proportional valve, the first NTC temperature sensor of the output port of the inner medium placement area, and the water pump through a communication line.

7. The liquid-cooled energy storage container system using an internal combustion engine for heating according to claim 1, characterized in that: The output port of the inner medium placement area is connected to the medium input channel of the liquid-cooled energy storage battery array module through an internal circulation pump, and the medium output channel of the liquid-cooled energy storage battery array module is connected to the reflux port of the inner medium placement area.

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