Energy-saving energy storage equipment PCS temperature control system

Abstract

The utility model discloses a PCS temperature control system of energy-saving energy storage equipment, which belongs to the technical field of equipment temperature control and comprises a circulating refrigeration mechanism, a cooling mechanism and a control mechanism. The energy storage battery temperature control mechanism is connected with the evaporation end of the circulating refrigeration mechanism and performs temperature control through heat exchange between a secondary refrigerant and a refrigerant of the circulating refrigeration mechanism; the energy storage PCS temperature control mechanism is connected with the condensation end of the circulating refrigeration mechanism, and temperature control is further carried out on PCS heat absorption after cooling water exchanges heat with a refrigerant of the circulating refrigeration mechanism; the condensation heat exchanger is connected with the PCS equipment in series, circulating cooling water exchanges heat with the condensation heat exchanger and then exchanges heat with the PCS equipment, cooling of the PCS equipment is achieved, the energy utilization efficiency can be improved, energy consumption can be reduced, and the structural space of the energy storage equipment can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment temperature control, and specifically relates to a PCS temperature control system for energy-saving energy storage equipment. Background Art

[0002] Energy storage equipment refers to equipment that stores excess electrical energy to cope with emergencies such as power grid interruptions or large-scale power outages.

[0003] PCS is the core component of energy storage equipment, responsible for converting the energy of DC batteries into AC power to supply the grid, or converting AC power into DC power to charge batteries.

[0004] PCS generates a lot of heat during operation. If the heat is not dissipated in time, the performance will be degraded, and even damaged in serious cases. Therefore, the temperature control system of PCS is crucial to the stable operation of PCS.

[0005] At present, the PCS temperature control system mainly adopts liquid cooling and air cooling technology. Among them, liquid cooling technology refers to the use of liquid cooling unit branches in the energy storage battery temperature control system for parallel cooling. This technology has energy waste due to the low temperature control requirements of PCS. Air cooling technology refers to the use of air-cooled radiators for cooling. This technology requires the addition of air-cooled radiators, which increases the structural space of the energy storage equipment.

[0006] In view of this, an energy-saving PCS temperature control system for energy storage equipment is designed to solve the above problems. Utility Model Content

[0007] To solve the problems raised in the above background technology, the utility model provides an energy-saving energy storage device PCS temperature control system, which has the characteristics of not only improving energy utilization efficiency and reducing energy consumption, but also saving energy storage device structure space.

[0008] To achieve the above purpose, the utility model provides the following technical solutions: an energy-saving energy storage equipment PCS temperature control system, comprising:

[0009] Cycle refrigeration mechanism, cycle refrigeration;

[0010] The energy storage battery temperature control mechanism is connected to the evaporation end of the circulating refrigeration mechanism, and the temperature is controlled by heat exchange between the coolant and the refrigerant of the circulating refrigeration mechanism;

[0011] The energy storage PCS temperature control mechanism is connected to the condensing end of the circulating refrigeration mechanism, and further controls the temperature of the PCS heat absorption after heat exchange between cooling water and the refrigerant of the circulating refrigeration mechanism.

[0012] Furthermore, the circulating refrigeration mechanism includes a compressor, a condensing heat exchanger, a throttle valve and an evaporative heat exchanger, the gas outlet of the compressor is connected to the gas inlet of the condensing heat exchanger through a pipeline, the liquid outlet of the condensing heat exchanger is connected to the liquid inlet of the throttle valve through a pipeline, the liquid outlet of the throttle valve is connected to the liquid inlet of the evaporative heat exchanger through a pipeline, and the gas outlet of the evaporative heat exchanger is connected to the gas inlet of the compressor through a pipeline.

[0013] Furthermore, the energy storage battery temperature control mechanism includes a first electronic water pump, a positive temperature coefficient thermistor heater and an energy storage battery cold plate, the liquid outlet of the first electronic water pump is connected to the liquid inlet of the evaporative heat exchanger through a pipeline, the liquid inlet of the positive temperature coefficient thermistor heater is connected to the liquid outlet of the evaporative heat exchanger through a pipeline, the liquid inlet of the energy storage battery cold plate is connected to the liquid outlet of the positive temperature coefficient thermistor heater through a pipeline, and the liquid outlet of the energy storage battery cold plate is connected to the liquid inlet of the first electronic water pump through a pipeline.

[0014] Furthermore, the energy storage PCS temperature control mechanism includes a PCS device, a fan-type heat exchanger and a second electronic water pump. The liquid inlet of the PCS device is connected to the liquid outlet of the condensing heat exchanger through a pipeline, the liquid inlet of the fan-type heat exchanger is connected to the liquid outlet of the PCS device through a pipeline, the liquid outlet of the fan-type heat exchanger is connected to the liquid inlet of the second electronic water pump through a pipeline, and the liquid outlet of the second electronic water pump is connected to the liquid inlet of the condensing heat exchanger through a pipeline.

[0015] Furthermore, a regulating valve is fixedly connected to the pipeline between the liquid outlet of the fan-type heat exchanger and the liquid inlet of the second electronic water pump.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model connects the condensing heat exchanger and the PCS equipment in series, and the circulating cooling water exchanges heat with the condensing heat exchanger and then exchanges heat with the PCS equipment, thereby cooling the PCS equipment. This structure can not only improve energy utilization efficiency and reduce energy consumption, but also save structural space of energy storage equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] In the figure: 101, compressor; 102, condensing heat exchanger; 103, throttle valve; 104, evaporating heat exchanger;

[0020] 201. first electronic water pump; 202. positive temperature coefficient thermistor heater; 203. energy storage battery cold plate;

[0021] 301. PCS equipment; 302. fan-type heat exchanger; 303. regulating valve; 304. second electronic water pump. 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] Embodiment 1

[0024] An energy-saving energy storage device PCS temperature control system, comprising:

[0025] Cycle refrigeration mechanism, cycle refrigeration;

[0026] The energy storage battery temperature control mechanism is connected to the evaporation end of the circulating refrigeration mechanism, and the temperature is controlled by heat exchange between the coolant and the refrigerant of the circulating refrigeration mechanism;

[0027] The energy storage PCS temperature control mechanism is connected to the condensing end of the circulating refrigeration mechanism, and further controls the temperature of the PCS heat absorption after heat exchange between cooling water and the refrigerant of the circulating refrigeration mechanism.

[0028] In this embodiment, see the attached Figure 1 When the PCS temperature control system of the energy-saving energy storage equipment is temperature controlled, the circulating refrigeration mechanism is used for circulating refrigeration. The refrigerant of the energy storage battery temperature control mechanism controls the temperature of the energy storage battery by exchanging heat with the cold generated by the circulating refrigeration mechanism. The cooling water of the energy storage PCS temperature control mechanism absorbs heat from the heat generated by the circulating refrigeration mechanism, and uses the residual temperature to further exchange heat with the PCS for temperature control.

[0029] Specifically, the circulating refrigeration mechanism includes a compressor 101, a condensing heat exchanger 102, a throttle valve 103 and an evaporative heat exchanger 104, the gas outlet of the compressor 101 is connected to the gas inlet of the condensing heat exchanger 102 through a pipeline, the liquid outlet of the condensing heat exchanger 102 is connected to the liquid inlet of the throttle valve 103 through a pipeline, the liquid outlet of the throttle valve 103 is connected to the liquid inlet of the evaporative heat exchanger 104 through a pipeline, and the gas outlet of the evaporative heat exchanger 104 is connected to the gas inlet of the compressor 101 through a pipeline.

[0030] In this embodiment, see the attached Figure 1 The circulating refrigeration mechanism sucks in low-temperature and low-pressure gas from the compressor 101, compresses it into high-temperature and high-pressure gas, enters the condensing heat exchanger 102, condenses it into low-temperature and high-pressure liquid, enters the throttle valve 103, becomes low-temperature and low-pressure liquid, enters the evaporating heat exchanger 104, becomes low-temperature and low-pressure gas, and then enters the compressor 101 to realize the refrigerant cycle.

[0031] Specifically, the energy storage battery temperature control mechanism includes a first electronic water pump 201, a positive temperature coefficient thermistor heater 202 and an energy storage battery cold plate 203. The liquid outlet of the first electronic water pump 201 is connected to the liquid inlet of the evaporative heat exchanger 104 through a pipeline, the liquid inlet of the positive temperature coefficient thermistor heater 202 is connected to the liquid outlet of the evaporative heat exchanger 104 through a pipeline, the liquid inlet of the energy storage battery cold plate 203 is connected to the liquid outlet of the positive temperature coefficient thermistor heater 202 through a pipeline, and the liquid outlet of the energy storage battery cold plate 203 is connected to the liquid inlet of the first electronic water pump 201 through a pipeline.

[0032] In this embodiment, see the attached Figure 1 When the temperature control mechanism of the energy storage battery cools down and controls the temperature, the first electronic water pump 201 is used to pump the coolant to circulate. The circulating coolant first enters the evaporative heat exchanger 104 to contact the generated cold energy to achieve cooling. The cooled circulating coolant then enters the positive temperature coefficient thermistor heater 202 and then enters the energy storage battery cold plate 203 to contact the heat generated by the energy storage battery to achieve cooling of the energy storage battery. The circulating coolant after absorbing heat then enters the first electronic water pump 201. The above steps are repeated to achieve cooling and temperature control of the energy storage battery.

[0033] When the temperature control mechanism of the energy storage battery increases the temperature, the circulation of the coolant is the same as the above steps. The difference is that when the circulating coolant enters the positive temperature coefficient thermistor heater 202 again, the positive temperature coefficient thermistor heater 202 heats the circulating coolant. The heated circulating coolant enters the energy storage battery cold plate 203 again to heat the energy storage battery, thereby realizing the temperature control of the energy storage battery.

[0034] Specifically, the energy storage PCS temperature control mechanism includes a PCS device 301, a fan-type heat exchanger 302 and a second electronic water pump 304. The liquid inlet of the PCS device 301 is connected to the liquid outlet of the condensing heat exchanger 102 through a pipeline, the liquid inlet of the fan-type heat exchanger 302 is connected to the liquid outlet of the PCS device 301 through a pipeline, the liquid outlet of the fan-type heat exchanger 302 is connected to the liquid inlet of the second electronic water pump 304 through a pipeline, and the liquid outlet of the second electronic water pump 304 is connected to the liquid inlet of the condensing heat exchanger 102 through a pipeline.

[0035] In this embodiment, see the attached Figure 1When the energy storage PCS temperature control mechanism is in temperature control, the second electronic water pump 304 is used to pump cooling water to realize the circulation of cooling water. The circulating cooling water first enters the condensing heat exchanger 102 to contact the generated heat to achieve temperature increase. The flow rate of the second electronic water pump 304 is adjusted to make the cooling water temperature rise below 10°C to meet the temperature control requirements of the PCS device 301. The heated circulating cooling water then enters the PCS device 301 to contact the heat generated by the PCS device 301 to achieve cooling of the PCS device 301. The circulating cooling water after absorbing heat then enters the fan-type heat exchanger 302 to cool down. The cooled circulating cooling water then enters the second electronic water pump 304. The above steps are repeated to achieve temperature control of the PCS device 301.

[0036] Embodiment 2

[0037] Specifically, a regulating valve 303 is fixedly connected to the pipeline between the liquid outlet of the fan-type heat exchanger 302 and the liquid inlet of the second electronic water pump 304 .

[0038] In this embodiment, see the attached Figure 1 The regulating valve 303 can adjust the cooling water flow between the fan heat exchanger 302 and the second electronic water pump 304 to ensure that the temperature rise of the circulating cooling water is controlled below 10°C.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving energy storage device PCS temperature control system, characterized in that: include: Cycle refrigeration mechanism, cycle refrigeration; The energy storage battery temperature control mechanism is connected to the evaporation end of the circulating refrigeration mechanism, and the temperature is controlled by heat exchange between the coolant and the refrigerant of the circulating refrigeration mechanism; The energy storage PCS temperature control mechanism is connected to the condensing end of the circulating refrigeration mechanism, and further controls the temperature of the PCS heat absorption after heat exchange between cooling water and the refrigerant of the circulating refrigeration mechanism.

2. According to claim 1, the PCS temperature control system for energy-saving energy storage equipment is characterized in that: The circulating refrigeration mechanism comprises a compressor (101), a condensing heat exchanger (102), a throttle valve (103) and an evaporating heat exchanger (104); the gas outlet of the compressor (101) is connected to the gas inlet of the condensing heat exchanger (102) via a pipeline; the liquid outlet of the condensing heat exchanger (102) is connected to the liquid inlet of the throttle valve (103) via a pipeline; the liquid outlet of the throttle valve (103) is connected to the liquid inlet of the evaporating heat exchanger (104) via a pipeline; and the gas outlet of the evaporating heat exchanger (104) is connected to the gas inlet of the compressor (101) via a pipeline.

3. According to claim 2, the PCS temperature control system for energy-saving energy storage equipment is characterized in that: The energy storage battery temperature control mechanism comprises a first electronic water pump (201), a positive temperature coefficient thermistor heater (202) and an energy storage battery cold plate (203); the liquid outlet of the first electronic water pump (201) is connected to the liquid inlet of the evaporative heat exchanger (104) via a pipeline; the liquid inlet of the positive temperature coefficient thermistor heater (202) is connected to the liquid outlet of the evaporative heat exchanger (104) via a pipeline; the liquid inlet of the energy storage battery cold plate (203) is connected to the liquid outlet of the positive temperature coefficient thermistor heater (202) via a pipeline; and the liquid outlet of the energy storage battery cold plate (203) is connected to the liquid inlet of the first electronic water pump (201) via a pipeline.

4. The PCS temperature control system for energy-saving energy storage equipment according to claim 2 is characterized in that: The energy storage PCS temperature control mechanism comprises a PCS device (301), a fan-type heat exchanger (302) and a second electronic water pump (304); the liquid inlet of the PCS device (301) is connected to the liquid outlet of the condensing heat exchanger (102) via a pipeline; the liquid inlet of the fan-type heat exchanger (302) is connected to the liquid outlet of the PCS device (301) via a pipeline; the liquid outlet of the fan-type heat exchanger (302) is connected to the liquid inlet of the second electronic water pump (304) via a pipeline; and the liquid outlet of the second electronic water pump (304) is connected to the liquid inlet of the condensing heat exchanger (102) via a pipeline.

5. The PCS temperature control system for energy-saving energy storage equipment according to claim 4 is characterized in that: A regulating valve (303) is fixedly connected to the pipeline between the liquid outlet of the fan-type heat exchanger (302) and the liquid inlet of the second electronic water pump (304).

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