Double-waterway energy storage liquid cooling unit

Abstract

The utility model discloses a double-waterway energy storage liquid cooling unit, which relates to the technical field of heat dissipation of an energy storage system and comprises a heat dissipation assembly, a pipeline assembly, an expansion water tank, a PTC (Positive Temperature Coefficient) water heater, a water pump and an expansion tank, and the pipeline assembly is arranged on one side of the heat dissipation assembly. Through the design of independent operation of the double water paths, the PCS water path and the battery water path are operated independently, and when the external environment temperature is low, the PCS water path conducts natural heat dissipation through the radiator; when the external environment temperature rises and natural heat dissipation cannot meet the cooling requirement, through adjustment of the proportional three-way valve, part of flow and the battery water path depend on refrigeration cycle heat dissipation of the compressor together, and the battery water path always depend on refrigeration cycle heat dissipation of the compressor, so that it is ensured that the battery pack can keep the optimal working temperature at any environment temperature; therefore, it is guaranteed that the PCS and the battery can work at the proper temperature all the time, the performance of the PCS is guaranteed, and meanwhile the service life of the PCS is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for energy storage systems, and in particular to a dual-water-path energy storage liquid-cooled unit. Background Technology

[0002] In energy storage systems, batteries and power conversion systems (PCS) are core components that generate a significant amount of heat during operation. However, due to the significant differences in the operating temperature requirements of batteries and PCS, traditional liquid cooling units often only meet the heat dissipation needs of one, resulting in excessively high temperatures in the other (usually the PCS), which affects system performance and stability.

[0003] Specifically, batteries need to operate within a low and stable temperature range (around 25°C) to maintain their optimal performance and extend their lifespan; while PCS may need to operate at higher temperatures (around 45°C), but excessively high temperatures can also negatively impact their performance and reliability. Therefore, simultaneously meeting the heat dissipation requirements of both batteries and PCS has become a major challenge for current energy storage system heat dissipation technology.

[0004] Therefore, it is necessary to invent a dual-water-path energy storage liquid-cooled unit to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a dual-water-path energy storage liquid-cooled unit to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dual-water-path energy storage liquid-cooled unit, comprising a heat dissipation assembly, a pipe assembly, an expansion tank, a PTC water heater, a water pump, and an expansion tank. The pipe assembly is disposed on one side of the heat dissipation assembly, the PTC water heater, the water pump, and the expansion tank are disposed between the heat dissipation assembly and the pipe assembly, and the expansion tank is fixedly installed on the back of the pipe assembly.

[0007] The heat dissipation assembly includes a condenser and a radiator, with the radiator fixedly disposed on the side of the condenser near the pipe assembly.

[0008] The pipeline assembly (2) includes a PCS outlet pipe (201), a PCS inlet pipe (202), a battery outlet pipe (203), and a battery inlet pipe (204). One end of the battery outlet pipe (203) is fixedly connected to the output end of the PTC water heater (4). The PCS inlet pipe (202) is fixedly connected to the input end of the radiator (102). The bottom of the PCS outlet pipe (201) is provided with a proportional three-way valve (205), a replenishment pipe (206), and a safety valve (207). One end of the PCS outlet pipe (201) is fixedly connected to the output end of the safety valve (207). One end of the battery inlet pipe (204) is fixedly connected to the replenishment pipe (206). The input end of the safety valve (207) is connected to the first connection port of the proportional three-way valve (205) through a pipe.

[0009] Preferably, a plate heat exchanger and a compressor are fixedly installed on both sides of the back of the radiator, the input end of the plate heat exchanger is connected to the output end of the water pump through a pipe, and the output end of the plate heat exchanger is connected to the input end of the PTC water heater through a pipe.

[0010] Preferably, the output end of the compressor is connected to the input end of the condenser through a pipe, and multiple fans are fixedly installed on the side of the condenser away from the radiator, distributed at equal intervals.

[0011] Preferably, the expansion tank and the replenishment pipe are connected by a pipeline, and a one-way valve is fixedly installed on the pipeline connecting the expansion tank and the replenishment pipe.

[0012] Preferably, the output end of the expansion tank is connected to the other input end of the safety valve, and one end of the replenishment pipe is fixedly connected to the second connection port of the proportional three-way valve.

[0013] Preferably, the battery water inlet pipe and the replenishment pipe are internally connected, the input end of the water pump is connected to the replenishment pipe through a pipe, the output end of the radiator is connected to both the replenishment pipe and the third connection port of the proportional three-way valve, and the expansion tank is fixedly installed on the pipe connected to the output end of the radiator and the replenishment pipe.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This invention employs a dual-water-circuit independent operation design, allowing the PCS water circuit and battery water circuit to operate separately. When the ambient temperature is low, the PCS water circuit relies on the radiator for natural heat dissipation. When the ambient temperature rises and natural heat dissipation is insufficient to meet cooling requirements, a proportional three-way valve adjusts the flow rate, allowing a portion of the flow, along with the battery water circuit, to rely on the compressor's refrigeration cycle for heat dissipation. Meanwhile, the battery water circuit always relies on the compressor's refrigeration cycle for heat dissipation, ensuring that the battery pack maintains its optimal operating temperature under any ambient temperature. This guarantees that the PCS and battery always operate at suitable temperatures, ensuring PCS performance while extending PCS lifespan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall rear structure of this utility model.

[0018] Figure 3 This is a schematic diagram of one side of the overall structure of this utility model.

[0019] Figure 4 This is a schematic diagram illustrating the working principle of the battery-only cooling system of this utility model.

[0020] Figure 5 This is a schematic diagram illustrating the working principle of the PCS water circuit natural cooling and the battery water circuit compressor refrigeration of this utility model.

[0021] Figure 6 This is a schematic diagram illustrating the working principle of the PCS water circuit natural cooling and compressor refrigeration of this utility model, and the battery water circuit compressor refrigeration.

[0022] Figure 7 This is a schematic diagram illustrating the working principle of the battery water circuit heating of this utility model.

[0023] In the diagram: 1. Heat dissipation assembly; 2. Piping assembly; 3. Expansion tank; 4. PTC water heater; 5. Water pump; 6. Expansion tank; 101. Condenser; 102. Radiator; 103. Plate heat exchanger; 104. Fan; 105. Compressor; 201. PCS outlet pipe; 202. PCS inlet pipe; 203. Battery outlet pipe; 204. Battery inlet pipe; 205. Proportional three-way valve; 206. Replenishment pipe; 207. Safety valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figure 1-7 The dual-channel energy storage liquid-cooled unit shown includes a heat dissipation component 1, a pipe assembly 2, an expansion tank 3, a PTC water heater 4, a water pump 5, and an expansion tank 6. The pipe assembly 2 is located on one side of the heat dissipation component 1, the PTC water heater 4, the water pump 5, and the expansion tank 6 are located between the heat dissipation component 1 and the pipe assembly 2, and the expansion tank 3 is fixedly installed on the back of the pipe assembly 2.

[0026] Furthermore, the heat dissipation assembly 1 includes a condenser 101 and a radiator 102, with the radiator 102 fixedly disposed on the side of the condenser 101 near the pipe assembly 2. Plate heat exchangers 103 and compressors 105 are fixedly installed on both sides of the back of the radiator 102, respectively. The input end of the plate heat exchanger 103 is connected to the output end of the water pump 5 through a pipe, and the output end of the plate heat exchanger 103 is connected to the input end of the PTC water heater 4 through a pipe. The output end of the compressor 105 is connected to the input end of the condenser 101 through a pipe. Multiple fans 104 distributed at equal intervals are installed on the side of the condenser 101 away from the radiator 102.

[0027] Piping assembly 2 includes a PCS outlet pipe 201, a PCS inlet pipe 202, a battery outlet pipe 203, and a battery inlet pipe 204. One end of the battery outlet pipe 203 is fixedly connected to the output end of the PTC water heater 4. The PCS inlet pipe 202 is fixedly connected to the input end of the radiator 102. One end of the PCS outlet pipe 201 is fixedly connected to the output end of the safety valve 207. A proportional three-way valve 205, a replenishment pipe 206, and a safety valve are installed at the bottom of the PCS outlet pipe 201. 207. The expansion tank 3 and the replenishment pipe 206 are connected by a pipeline, and a one-way valve is fixedly installed on the pipeline connecting the expansion tank 3 and the replenishment pipe 206. The output end of the expansion tank 3 is connected to the other input end of the safety valve 207. The input end of the safety valve 207 is connected to the first connection port of the proportional three-way valve 205 through a pipeline. One end of the replenishment pipe 206 is fixedly connected to the second connection port of the proportional three-way valve 205. One end of the battery water inlet pipe 204 is fixedly connected to the replenishment pipe 206. Furthermore, the battery inlet pipe 204 is internally connected to the replenishment pipe 206, the input end of the water pump 5 is connected to the replenishment pipe 206 through a pipe, the output end of the radiator 102 is connected to both the replenishment pipe 206 and the third connection port of the proportional three-way valve 205, and the expansion tank 6 is fixedly installed on the pipe connecting the output end of the radiator 102 and the replenishment pipe 206. Through the design of independent operation of the dual water circuits, the PCS water circuit and the battery water circuit operate independently. When the ambient temperature is low, the PCS water circuit relies on the radiator for natural heat dissipation; when the ambient temperature rises and natural heat dissipation cannot meet the cooling requirements, the proportional three-way valve 205 is used to adjust the flow rate, and a portion of the flow, together with the battery water circuit, relies on the compressor 105 for cooling circulation. The battery water circuit always relies on the compressor for cooling circulation, ensuring that the battery pack can maintain the optimal operating temperature under any ambient temperature, thereby ensuring that the PCS and the battery can always operate at a suitable temperature, ensuring the performance of the PCS while improving its service life.

[0028] Example 1, such as Figure 4 As shown, when only the battery is cooled, even when the 100W water pump in the PCS water circuit is turned off, the battery pack's water circuit cooling system still maintains a complete cycle. This process ensures that when the PCS does not need to cool down, the battery water circuit can still ensure that the coolant can continuously flow in the battery pack through its built-in water pump 5, thereby effectively removing the heat generated by the battery during charging and discharging, and ensuring the safe and stable operation of the battery pack.

[0029] Example 2, as Figure 5 As shown, under low ambient temperature conditions: one is the PCS water circuit, which uses natural cooling; the other is the battery water circuit, which uses compressor 105 for cooling. The two water circuits do not interfere with each other and operate independently to ensure the system's high efficiency and stability. An expansion tank 6 is also provided to maintain the water circuit pressure balance.

[0030] Example 3, as Figure 6 As shown, when the ambient temperature rises and the natural heat dissipation capacity of the PCS water circuit decreases, the proportional three-way valve 205 plays a key role in flow distribution in this system. The proportional three-way valve 205 will automatically adjust its opening degree according to the signal from the temperature sensor. By changing the opening degree of the proportional three-way valve 205, the flow rate of the PCS water circuit through the natural cooling loop and the flow rate through the plate heat exchanger 103 loop can be controlled, thereby achieving optimized flow distribution. The cooling water through the plate heat exchanger 103 loop finally returns to the PCS water circuit at the expansion tank 6, ensuring the water circuit pressure balance inside the system.

[0031] The coolant in part of the PCS water circuit is guided into a pipeline that is combined with the battery water circuit. The combined coolant then enters the plate heat exchanger 103 for efficient heat exchange. Through heat exchange, the temperature of the coolant is reduced, thereby meeting the heat dissipation requirements of the PCS water circuit and the battery circuit.

[0032] Example 4, as Figure 7 As shown, when the outside temperature is low, in order to ensure the normal operation and performance of the battery, improve the battery performance, ensure that its performance is fully utilized, and extend the battery life, the battery needs to be heated by the PTC water heater 4. In this process, the compressor 105 is usually turned off and the PTC water heater 4 is turned on. In a low-temperature environment, if the air conditioning system is still running, its compressor 105 may consume a lot of electrical energy, and the cold energy generated is unnecessary for the battery that needs to be heated. Therefore, in order to save energy and improve heating efficiency, the compressor 105 is usually turned off.

[0033] Working principle of this utility model:

[0034] During use, the cooling water of the PCS enters the radiator 102 through the PCS inlet pipe 202 for natural cooling. Then, it connects to the proportional three-way valve 205 through the output end of the radiator 102 and finally circulates through the PCS outlet pipe 201. Meanwhile, the battery water circuit enters the plate heat exchanger 103 through the battery inlet pipe 204 and the water pump 5 for heat dissipation. At the same time, the condenser 101 and the compressor 105 work together to cool the plate heat exchanger 103. When the outside temperature is too high and the natural cooling of the PCS water circuit cannot meet the cooling requirements, the flow rate is adjusted by the three-way valve, and part of the flow rate, together with the battery water circuit, relies on the compressor for cooling circulation.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-water-path energy storage liquid-cooled unit, characterized in that: The device includes a heat dissipation assembly (1), a pipe assembly (2), an expansion tank (3), a PTC water heater (4), a water pump (5), and an expansion tank (6). The pipe assembly (2) is located on one side of the heat dissipation assembly (1), and the PTC water heater (4), water pump (5), and expansion tank (6) are located between the heat dissipation assembly (1) and the pipe assembly (2). The expansion tank (3) is fixedly installed on the back of the pipe assembly (2). The heat dissipation assembly (1) includes a condenser (101) and a radiator (102), and the radiator (102) is fixedly disposed on the side of the condenser (101) near the pipe assembly (2); The pipeline assembly (2) includes a PCS outlet pipe (201), a PCS inlet pipe (202), a battery outlet pipe (203), and a battery inlet pipe (204). One end of the battery outlet pipe (203) is fixedly connected to the output end of the PTC water heater (4). The PCS inlet pipe (202) is fixedly connected to the input end of the radiator (102). The bottom of the PCS outlet pipe (201) is provided with a proportional three-way valve (205), a replenishment pipe (206), and a safety valve (207). One end of the PCS outlet pipe (201) is fixedly connected to the output end of the safety valve (207). One end of the battery inlet pipe (204) is fixedly connected to the replenishment pipe (206). The input end of the safety valve (207) is connected to the first connection port of the proportional three-way valve (205) through a pipe.

2. The dual-water-path energy storage liquid-cooled unit according to claim 1, characterized in that: Plate heat exchangers (103) and compressors (105) are fixedly installed on both sides of the back of the radiator (102). The input end of the plate heat exchanger (103) is connected to the output end of the water pump (5) through a pipe, and the output end of the plate heat exchanger (103) is connected to the input end of the PTC water heater (4) through a pipe.

3. The dual-water-path energy storage liquid-cooled unit according to claim 2, characterized in that: The output end of the compressor (105) is connected to the input end of the condenser (101) through a pipe. Multiple fans (104) are fixedly installed on the side of the condenser (101) away from the radiator (102) and are distributed at equal intervals.

4. The dual-water-path energy storage liquid-cooled unit according to claim 3, characterized in that: The expansion tank (3) and the replenishment pipe (206) are connected by a pipeline, and a one-way valve is fixedly installed on the pipeline connecting the expansion tank (3) and the replenishment pipe (206).

5. A dual-water-path energy storage liquid-cooled unit according to claim 4, characterized in that: The output end of the expansion tank (3) is connected to the other input end of the safety valve (207), and one end of the replenishment pipe (206) is fixedly connected to the second connection port of the proportional three-way valve (205).

6. A dual-water-path energy storage liquid-cooled unit according to claim 5, characterized in that: The battery water inlet pipe (204) is internally connected to the replenishment pipe (206). The input end of the water pump (5) is connected to the replenishment pipe (206) through a pipe. The output end of the radiator (102) is connected to both the replenishment pipe (206) and the third connection port of the proportional three-way valve (205). The expansion tank (6) is fixedly installed on the pipe connecting the output end of the radiator (102) and the replenishment pipe (206).

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