Cooling system for improving heat exchange efficiency of energy storage equipment PCS

Abstract

The utility model discloses a cooling system for improving PCS heat exchange efficiency of energy storage equipment, which belongs to the technical field of equipment cooling, and comprises a circulating refrigeration mechanism, an energy storage equipment cooling mechanism and a PCS cooling mechanism, the PCS cooling mechanism comprises PCS equipment, a second electronic water pump and a fan type heat exchanger, the liquid inlet end of the second electronic water pump is connected with the liquid outlet end of the fan type heat exchanger through a pipeline, the liquid outlet end of the second electronic water pump is connected with the condensing heat exchanger and the liquid inlet end of the PCS equipment through pipelines, and the liquid inlet end of the fan type heat exchanger is connected with the condensing heat exchanger and the liquid outlet end of the PCS equipment through pipelines; the parallel loop is designed, so that the condensing heat exchanger and the PCS equipment operate in parallel, the two equipment independently receive cooling water, the heat exchange efficiency is improved, the energy utilization rate is improved, the energy consumption is reduced, and meanwhile, the system cost and the structural space are saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment cooling, and particularly relates to a cooling system for improving the heat exchange efficiency of a PCS of an energy storage device. Background Technique

[0002] An energy storage device refers to a device that stores surplus electric energy to cope with emergencies such as power grid interruption or large-scale power outages.

[0003] The PCS is a core component of the energy storage device, responsible for converting the energy of the DC battery into alternating current to supply the power grid, or converting alternating current into direct current to charge the battery.

[0004] During the operation of the energy storage device and the PCS, a large amount of heat will be generated. If the heat is not dissipated in time, it will lead to performance degradation and even damage in severe cases. Therefore, the PCS cooling system of the energy storage device is crucial for the stable operation of the energy storage device and the PCS.

[0005] The current PCS cooling systems of energy storage devices mainly adopt liquid cooling and air cooling technologies. Among them, the liquid cooling technology refers to using the liquid cooling unit branch in the energy storage battery temperature control system for parallel cooling. Due to the relatively low temperature control requirements of the PCS, there is a situation of energy waste. The air cooling technology refers to using an air-cooled radiator for cooling. Due to the need to add an air-cooled radiator, there is a situation of increasing the cost and structural space of the energy storage system.

[0006] In view of this, a cooling system for improving the heat exchange efficiency of a PCS of an energy storage device is designed to solve the above problems. Content of the Utility Model

[0007] To solve the problems raised in the above background technique, the utility model provides a cooling system for improving the heat exchange efficiency of a PCS of an energy storage device, which has the characteristics of improving the heat exchange efficiency, improving the energy utilization rate, reducing energy consumption, and at the same time saving the system cost and structural space.

[0008] To achieve the above purpose, the utility model provides the following technical solution: A cooling system for improving the heat exchange efficiency of a PCS of an energy storage device, comprising:

[0009] A circulating refrigeration mechanism for circulating refrigeration;

[0010] An energy storage device cooling mechanism connected to the evaporation end of the circulating refrigeration mechanism, and cooled by exchanging heat between the coolant and the refrigerant of the circulating refrigeration mechanism;

[0011] A PCS cooling mechanism connected to the condensation end of the circulating refrigeration mechanism, and further cooling the heat absorption of the PCS by convective heat exchange between the cooling water and the outside air;

[0012] The PCS cooling mechanism includes a PCS device, a second electronic water pump, and a fan heat exchanger. The liquid inlet end of the second electronic water pump is connected to the liquid outlet end of the fan heat exchanger through a pipeline. The liquid outlet end of the second electronic water pump is connected to the condensation heat exchanger and the liquid inlet end of the PCS device through a pipeline. The liquid inlet end of the fan heat exchanger is connected to the condensation heat exchanger and the liquid outlet end of the PCS device through a pipeline.

[0013] Furthermore, the circulating refrigeration mechanism includes an evaporation heat exchanger, a compressor, a condensation heat exchanger, and a throttle valve. The gas outlet end of the compressor is connected to the gas inlet end of the condensation heat exchanger through a pipeline. The liquid outlet end of the condensation heat exchanger is connected to the liquid inlet end of the throttle valve through a pipeline. The liquid outlet end of the throttle valve is connected to the liquid inlet end of the evaporation heat exchanger through a pipeline. The gas outlet end of the evaporation heat exchanger is connected to the gas inlet end of the compressor through a pipeline.

[0014] Furthermore, the energy storage device cooling mechanism includes an energy storage battery cold plate and a first electronic water pump. The liquid inlet end of the first electronic water pump is connected to the liquid outlet end of the evaporation heat exchanger through a pipeline. The liquid outlet end of the first electronic water pump is connected to the liquid inlet end of the energy storage battery cold plate through a pipeline. The liquid outlet end of the first electronic water pump is connected to the liquid inlet end of the evaporation heat exchanger through a pipeline.

[0015] Furthermore, it further includes:

[0016] a regulating mechanism for regulating the medium flow rate in each pipeline;

[0017] The regulating mechanism includes a number of flow regulating valves, which are respectively fixedly connected to the pipeline between the compressor and the condensation heat exchanger, the pipeline between the condensation heat exchanger and the throttle valve, the pipeline between the throttle valve and the evaporation heat exchanger, the pipeline between the evaporation heat exchanger and the compressor, the pipeline between the first electronic water pump and the evaporation heat exchanger, the pipeline between the energy storage battery cold plate and the first electronic water pump, the pipeline between the energy storage battery cold plate and the evaporation heat exchanger, the pipeline between the second electronic water pump and the fan heat exchanger, the pipeline between the second electronic water pump and the condensation heat exchanger and the PCS device, and the pipeline between the fan heat exchanger and the condensation heat exchanger and the PCS device.

[0018] Furthermore, the regulating mechanism further includes a number of temperature sensors, which are respectively fixedly connected to both sides of the flow regulating valve on the pipeline between the compressor and the condensation heat exchanger, the side of the flow regulating valve on the pipeline between the condensation heat exchanger and the throttle valve close to the condensation heat exchanger, the side of the flow regulating valve on the pipeline between the throttle valve and the evaporation heat exchanger close to the throttle valve, and both sides of the flow regulating valve on the pipeline between the evaporation heat exchanger and the compressor.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] The utility model designs a parallel loop, enabling the parallel operation of the condensation heat exchanger and the PCS device, so that the two devices independently receive cooling water, improving the heat exchange efficiency, enhancing the energy utilization rate, reducing energy consumption, and saving the system cost and structural space at the same time. Brief Description of the Drawings

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] In the figure: 101, evaporation heat exchanger; 102, compressor; 103, condensation heat exchanger; 104, throttle valve;

[0023] 201, energy storage battery cold plate; 202, first electronic water pump;

[0024] 301, PCS device; 302, second electronic water pump; 303, fan-type heat exchanger;

[0025] 401, flow regulating valve; 402, temperature sensor. Specific Embodiments

[0026] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0027] Embodiment 1

[0028] A cooling system for improving the heat exchange efficiency of the PCS of an energy storage device, comprising:

[0029] A circulating refrigeration mechanism for circulating refrigeration;

[0030] An energy storage device cooling mechanism, connected to the evaporation end of the circulating refrigeration mechanism, and cooled by exchanging heat between the coolant and the refrigerant of the circulating refrigeration mechanism;

[0031] A PCS cooling mechanism, connected to the condensation end of the circulating refrigeration mechanism, and further cooling the heat absorption of the PCS by convective heat exchange between the cooling water and the outside air;

[0032] The PCS cooling mechanism includes a PCS device 301, a second electronic water pump 302, and a fan-type heat exchanger 303. The liquid inlet end of the second electronic water pump 302 is connected to the liquid outlet end of the fan-type heat exchanger 303 through a pipeline. The liquid outlet end of the second electronic water pump 302 is connected to the liquid inlet ends of the condensation heat exchanger 103 and the PCS device 301 through a pipeline. The liquid inlet end of the fan-type heat exchanger 303 is connected to the liquid outlet ends of the condensation heat exchanger 103 and the PCS device 301 through a pipeline.

[0033] In this embodiment, referring to the attached Figure 1 , when the cooling system for improving the heat exchange efficiency of the PCS of the energy storage device is working, the circulating refrigeration mechanism circulates and refrigerates. The energy storage device is cooled by the heat exchange between the coolant in the energy storage device cooling mechanism and the refrigerant of the circulating refrigeration mechanism. The PCS is cooled by the further heat absorption of the PCS after the cooling water in the PCS cooling mechanism convects and exchanges heat with the outside air;

[0034] Among them, the specific principle of the PCS cooling mechanism is as follows: The circulation of the cooling water is realized by the pumping of the second electronic water pump 302. The cooling water first contacts the heat in the condensation heat exchanger 103 to realize temperature rise. The heated cooling water enters the fan heat exchanger 303 to cool down. The cooled cooling water enters the second electronic water pump 302, and is respectively pumped by the second electronic water pump 302 into the condensation heat exchanger 103 and the PCS device 301. The cooling water pumped into the condensation heat exchanger 103 repeats the above steps to realize the cooling of the cooling water that absorbs the heat in the condensation heat exchanger 103. The cooling water pumped into the PCS device 301 contacts the heat generated by the PCS device 301 to realize heat absorption and cooling. The heated cooling water then enters the fan heat exchanger 303 to cool down, realizing the cooling of the cooling water that absorbs the heat in the PCS device 301. Repeating the above steps realizes the cooling of the PCS device 301.

[0035] Specifically, the circulating refrigeration mechanism includes an evaporation heat exchanger 101, a compressor 102, a condensation heat exchanger 103, and a throttle valve 104. The gas outlet end of the compressor 102 is connected to the gas inlet end of the condensation heat exchanger 103 through a pipeline. The liquid outlet end of the condensation heat exchanger 103 is connected to the liquid inlet end of the throttle valve 104 through a pipeline. The liquid outlet end of the throttle valve 104 is connected to the liquid inlet end of the evaporation heat exchanger 101 through a pipeline. The gas outlet end of the evaporation heat exchanger 101 is connected to the gas inlet end of the compressor 102 through a pipeline.

[0036] In this embodiment, referring to the attached Figure 1 , the circulating refrigeration mechanism sucks in low-temperature and low-pressure gas by the compressor 102, compresses it into high-temperature and high-pressure gas, enters the condensation heat exchanger 103, condenses into low-temperature and high-pressure liquid, enters the throttle valve 104, becomes low-temperature and low-pressure liquid, enters the evaporation heat exchanger 101, becomes low-temperature and low-pressure gas, and then enters the compressor 102 to realize the refrigerant cycle.

[0037] Specifically, the energy storage device cooling mechanism includes an energy storage battery cold plate 201 and a first electronic water pump 202. The liquid inlet end of the first electronic water pump 202 is connected to the liquid outlet end of the evaporation heat exchanger 101 through a pipeline. The liquid outlet end of the first electronic water pump 202 is connected to the liquid inlet end of the energy storage battery cold plate 201 through a pipeline. The liquid outlet end of the first electronic water pump 202 is connected to the liquid inlet end of the evaporation heat exchanger 101 through a pipeline.

[0038] In this embodiment, referring to the attached Figure 1 , when the energy storage device cooling mechanism cools, the circulation of the coolant is realized by the pumping of the first electronic water pump 202. The coolant first contacts the cold quantity in the evaporation heat exchanger 101 to realize temperature reduction. The cooled coolant is pumped by the first electronic water pump 202 into the energy storage battery cold plate 201, contacts the heat generated by the energy storage battery to realize heat absorption and cooling. The heat-absorbed coolant then enters the evaporation heat exchanger 101 to realize temperature reduction, and the above steps are repeated to realize the cooling of the energy storage battery.

[0039] Embodiment Two

[0040] The difference between this embodiment and Embodiment One is that:

[0041] Specifically, it further includes:

[0042] A regulating mechanism for regulating the medium flow rate in each pipeline;

[0043] The regulating mechanism includes a number of flow regulating valves 401, and the number of flow regulating valves 401 are respectively fixedly connected to the pipelines between the compressor 102 and the condensation heat exchanger 103, between the condensation heat exchanger 103 and the throttle valve 104, between the throttle valve 104 and the evaporation heat exchanger 101, between the evaporation heat exchanger 101 and the compressor 102, between the first electronic water pump 202 and the evaporation heat exchanger 101, between the energy storage battery cold plate 201 and the first electronic water pump 202, between the energy storage battery cold plate 201 and the evaporation heat exchanger 101, between the second electronic water pump 302 and the fan heat exchanger 303, between the second electronic water pump 302 and the condensation heat exchanger 103 and the PCS device 301, and between the fan heat exchanger 303 and the condensation heat exchanger 103 and the PCS device 301.

[0044] In this embodiment, referring to the attached Figure 1 , the regulating mechanism controls the flow rate of each pipeline by controlling a number of flow regulating valves 401, so as to achieve the purpose of accurate temperature control and cooling.

[0045] Specifically, the regulating mechanism further includes a number of temperature sensors 402, and the number of temperature sensors 402 are respectively fixedly connected to both sides of the flow regulating valve 401 on the pipeline between the compressor 102 and the condensation heat exchanger 103, the side of the flow regulating valve 401 on the pipeline between the condensation heat exchanger 103 and the throttle valve 104 close to the condensation heat exchanger 103, the side of the flow regulating valve 401 on the pipeline between the throttle valve 104 and the evaporation heat exchanger 101 close to the throttle valve 104, and both sides of the flow regulating valve 401 on the pipeline between the evaporation heat exchanger 101 and the compressor 102.

[0046] In this embodiment, referring to the attached Figure 1, several flow regulating valves 401 of the regulating mechanism are controlled based on the real-time monitored temperature data of the temperature sensors 402 at corresponding positions.

[0047] The evaporation heat exchanger 101, compressor 102, condensation heat exchanger 103, throttle valve 104, first electronic water pump 202, second electronic water pump 302, fan heat exchanger 303, flow regulating valve 401 and temperature sensor 402 are all conventional instruments, and their working principles, dimensions and models are irrelevant to the functions of this application, so no more description will be given. Moreover, this utility model is mainly used to protect mechanical devices, so the control methods and circuit connections of this utility model will not be explained in detail.

[0048] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A cooling system for improving the heat exchange efficiency of energy storage equipment PCS, characterized in that: include: Cycle refrigeration mechanism, cycle refrigeration; The energy storage device cooling mechanism is connected to the evaporation end of the circulating refrigeration mechanism, and is cooled by heat exchange between the refrigerant and the refrigerant of the circulating refrigeration mechanism; The PCS cooling mechanism is connected to the condensing end of the circulating refrigeration mechanism, and further cools the PCS heat absorption through convection heat exchange between cooling water and external air; The PCS cooling mechanism comprises a PCS device (301), a second electronic water pump (302) and a fan-type heat exchanger (303); the liquid inlet of the second electronic water pump (302) is connected to the liquid outlet of the fan-type heat exchanger (303) via a pipeline; the liquid outlet of the second electronic water pump (302) is connected to the condensing heat exchanger (103) and the liquid inlet of the PCS device (301) via a pipeline; the liquid inlet of the fan-type heat exchanger (303) is connected to the condensing heat exchanger (103) and the liquid outlet of the PCS device (301) via a pipeline.

2. A cooling system for improving the heat exchange efficiency of energy storage equipment PCS according to claim 1, characterized in that: The circulating refrigeration mechanism comprises an evaporative heat exchanger (101), a compressor (102), a condensing heat exchanger (103) and a throttle valve (104); the gas outlet of the compressor (102) is connected to the gas inlet of the condensing heat exchanger (103) via a pipeline; the liquid outlet of the condensing heat exchanger (103) is connected to the liquid inlet of the throttle valve (104) via a pipeline; the liquid outlet of the throttle valve (104) is connected to the liquid inlet of the evaporative heat exchanger (101) via a pipeline; and the gas outlet of the evaporative heat exchanger (101) is connected to the gas inlet of the compressor (102) via a pipeline.

3. A cooling system for improving the heat exchange efficiency of energy storage equipment PCS according to claim 2, characterized in that: The energy storage device cooling mechanism comprises an energy storage battery cold plate (201) and a first electronic water pump (202); a liquid inlet of the first electronic water pump (202) is connected to a liquid outlet of the evaporative heat exchanger (101) via a pipeline; a liquid outlet of the first electronic water pump (202) is connected to a liquid inlet of the energy storage battery cold plate (201) via a pipeline; and a liquid outlet of the first electronic water pump (202) is connected to a liquid inlet of the evaporative heat exchanger (101) via a pipeline.

4. A cooling system for improving the heat exchange efficiency of energy storage equipment PCS according to claim 3, characterized in that: Also includes: Adjusting mechanism, regulating the medium flow in each pipeline; The regulating mechanism comprises a plurality of flow regulating valves (401), wherein the plurality of flow regulating valves (401) are respectively fixedly connected to a pipeline between a compressor (102) and a condensing heat exchanger (103), a pipeline between a condensing heat exchanger (103) and a throttle valve (104), a pipeline between a throttle valve (104) and an evaporating heat exchanger (101), a pipeline between an evaporating heat exchanger (101) and a compressor (102), and a pipeline between a first electronic water pump (202) and an evaporating heat exchanger (101). , on the pipeline between the energy storage battery cold plate (201) and the first electronic water pump (202), on the pipeline between the energy storage battery cold plate (201) and the evaporative heat exchanger (101), on the pipeline between the second electronic water pump (302) and the fan-type heat exchanger (303), on the pipeline between the second electronic water pump (302) and the condensing heat exchanger (103) and the PCS device (301), and on the pipeline between the fan-type heat exchanger (303) and the condensing heat exchanger (103) and the PCS device (301).

5. A cooling system for improving the heat exchange efficiency of energy storage equipment PCS according to claim 4, characterized in that: The regulating mechanism further comprises a plurality of temperature sensors (402), wherein the plurality of temperature sensors (402) are respectively fixedly connected to two sides of a flow regulating valve (401) on the pipeline between the compressor (102) and the condensing heat exchanger (103), a side of the flow regulating valve (401) on the pipeline between the condensing heat exchanger (103) and the throttle valve (104) close to the condensing heat exchanger (103), a side of the flow regulating valve (401) on the pipeline between the throttle valve (104) and the evaporating heat exchanger (101) close to the throttle valve (104), and two sides of the flow regulating valve (401) on the pipeline between the evaporating heat exchanger (101) and the compressor (102).

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