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CN-117251008-B - Energy storage equipment temperature control system and temperature control method thereof

CN117251008BCN 117251008 BCN117251008 BCN 117251008BCN-117251008-B

Abstract

The invention provides an energy storage device temperature control system and a temperature control method thereof, wherein the energy storage device comprises a battery module and other energy storage components except the battery module, the temperature control system comprises a controller, a refrigerating system, an immersion system and a liquid cooling plate system, the controller is respectively in control connection with the refrigerating system, the immersion system and the liquid cooling plate system, the refrigerating system is connected with the immersion system through a first plate heat exchanger, the refrigerating system is connected with the liquid cooling plate system through a second plate heat exchanger, the first plate heat exchanger and the second plate heat exchanger are arranged in parallel in the refrigerating system, an immersion box is arranged in the immersion system, the liquid cooling plate system is provided with the liquid cooling plate component, the battery module is immersed in the immersion box, and at least part of other energy storage components are in contact with the liquid cooling plate component. The temperature control system adopts different heat dissipation modes according to different heat generation amounts of different components in the energy storage equipment, so that the cooling load is reasonably distributed, the heat dissipation effect is good, and the energy consumption is low.

Inventors

  • WEN HAIPING
  • LI BAIWEI
  • DAI ZHITE
  • WANG XIAOYONG
  • LIN XINJIAN
  • WEN YULIANG

Assignees

  • 东莞市硅翔绝缘材料有限公司

Dates

Publication Date
20260508
Application Date
20231012

Claims (7)

  1. 1. An energy storage device temperature control system, the energy storage device comprising a battery module (100), and other energy storage components other than the battery module; the temperature control system is characterized by comprising a controller, a refrigerating system (1), an immersion system (2) and a liquid cooling plate system (3), wherein the controller is respectively in control connection with the refrigerating system (1), the immersion system (2) and the liquid cooling plate system (3), the refrigerating system (1) is connected with the immersion system (2) through a first plate type heat exchanger (4), the refrigerating system (1) is connected with the liquid cooling plate system (3) through a second plate type heat exchanger (5), the first plate type heat exchanger (4) and the second plate type heat exchanger (5) are arranged in the refrigerating system (1) in parallel, an immersion tank (20) is arranged in the immersion system, a liquid cooling plate assembly (30) is arranged in the liquid cooling plate system (3), the battery module (100) is immersed in the immersion tank (20), at least part of the other energy storage assemblies are in contact with the liquid cooling plate assembly (30), the immersion system (2) has four modes, namely an immersion mode, a cooling plate cooling mode, a self-cooling mode, a circulating cooling mode and a liquid cooling mode and a cooling plate mode (3) have three-cooling modes, a liquid cooling plate self-circulation mode; The refrigeration system (1) comprises a gas-liquid separator (11), a compressor (12), a condenser (13), a liquid storage tank (14) and a first filter (15) which are sequentially connected, wherein a cold side inlet (41) of the first plate heat exchanger and a cold side inlet (51) of the second plate heat exchanger are connected with the first filter (15), a cold side outlet (42) of the first plate heat exchanger and a cold side outlet (52) of the second plate heat exchanger are connected with the gas-liquid separator (11), a first electronic expansion valve (16) is arranged between the first filter (15) and the cold side inlet (41) of the first plate heat exchanger, and a second electronic expansion valve (17) is arranged between the first filter (15) and the cold side inlet (51) of the second plate heat exchanger; The immersion system (2) comprises an immersion main path, an immersion radiating branch path and an immersion heating branch path, wherein the immersion main path comprises a second filter (21), a first expansion tank (22), a first hydraulic pump (23), a first electromagnetic valve (24), an immersion tank (20) and a second electromagnetic valve (25) which are sequentially connected, a hot side inlet (43) of a first plate heat exchanger is connected with the second electromagnetic valve (25), a hot side outlet (44) of the first plate heat exchanger is connected with the second filter (21), an inlet end of the immersion radiating branch path is arranged between the second electromagnetic valve (25) and the immersion tank (20), an outlet end of the immersion radiating branch path is arranged between the hot side outlet (44) of the first plate heat exchanger and the second filter (21), the immersion heating branch path and the first electromagnetic valve (24) are arranged in parallel, and the immersion radiating branch path comprises a third electromagnetic valve (26) and a first radiator (27) which are sequentially arranged, and the immersion heating branch path comprises an electric heater (28); The liquid cooling plate system comprises a liquid cooling plate main path and a liquid cooling plate radiating branch path, wherein the liquid cooling plate main path comprises a third filter (31), a second expansion tank (32), a second hydraulic pump (33), a liquid cooling plate assembly (30) and a fourth electromagnetic valve (34) which are sequentially connected, a hot side inlet (53) of a second plate heat exchanger is connected with the fourth electromagnetic valve (34), a hot side outlet (54) of the second plate heat exchanger is connected with the third filter (31), an inlet end of the liquid cooling plate radiating branch path is arranged between the fourth electromagnetic valve (34) and the liquid cooling plate assembly (30), an outlet end of the liquid cooling plate radiating branch path is arranged between the hot side outlet (54) of the second plate heat exchanger and the third filter (31), and the liquid cooling plate radiating branch path comprises a fifth electromagnetic valve (35) and a second radiator (36) which are sequentially arranged.
  2. 2. The energy storage device temperature control system according to claim 1, wherein at least one of a temperature sensor (6) is arranged between a cold side outlet (42) of the first plate heat exchanger and the gas-liquid separator (11), between a cold side outlet (52) of the second plate heat exchanger and the gas-liquid separator (11), between the compressor (12) and the condenser (13) and between the liquid storage tank (14) and the first filter (15), a low pressure sensor (18) is arranged at an inlet end of the compressor (12), a high pressure sensor (19) is arranged at an outlet end of the compressor (12), and a pressure switch (10) is arranged between the high pressure sensor (19) and the condenser (13).
  3. 3. The energy storage equipment temperature control system according to claim 1, characterized in that a first one-way valve (29) is arranged between the first hydraulic pump (23) and the first electromagnetic valve (24), a first flow switch (210) is arranged between the outlet end of the immersed radiating branch and the second filter (21), a pressure sensor (7) is arranged between the second filter (21) and the first expansion tank (22), between the first one-way valve (29) and the first electromagnetic valve (24) and between the second electromagnetic valve (25) and the immersion tank (20), and a temperature sensor (6) is arranged at the inlet end and/or the outlet end of the immersion tank.
  4. 4. The energy storage device temperature control system according to claim 1, wherein when the immersion system enters an immersion cooling mode, the first electronic expansion valve (16), the first electromagnetic valve (24) and the second electromagnetic valve (25) are all opened, the third electromagnetic valve (26) and the electric heater (28) are all closed, an immersion cooling circuit is formed in the immersion system (2), when the immersion system enters an immersion cooling mode, the first electromagnetic valve (24) and the third electromagnetic valve (26) are all opened, the first electronic expansion valve (16), the second electromagnetic valve (25) and the electric heater (28) are all closed, an immersion cooling circuit is formed in the immersion system (2), when the immersion system enters an immersion self-circulation mode, the first electromagnetic valve (24) and the second electromagnetic valve (25) are all opened, the first electronic expansion valve (16), the third electromagnetic valve (26) and the electric heater (28) are all closed, when the immersion system enters an immersion self-circulation mode, the first electromagnetic valve (24) and the second electromagnetic valve (28) are all opened, an immersion heating circuit is formed in the immersion system (2).
  5. 5. The energy storage equipment temperature control system according to claim 1, wherein a second one-way valve (37) is arranged between the second hydraulic pump (33) and the liquid cooling plate assembly (30), a second flow switch (38) is arranged between the outlet end of the liquid cooling plate heat dissipation branch and the third filter (31), a pressure sensor (7) is arranged between the third filter (31) and the second expansion tank (32), between the second one-way valve (37) and the liquid cooling plate assembly (30) and at least one place between the fourth electromagnetic valve (34) and the liquid cooling plate assembly (30), and a temperature sensor (6) is arranged at the inlet end and/or the outlet end of the liquid cooling plate assembly (30).
  6. 6. The energy storage equipment temperature control system according to claim 1, wherein when the liquid cooling plate system (3) enters a liquid cooling plate refrigerating mode, the second electronic expansion valve (17) and the fourth electromagnetic valve (34) are both opened, the fifth electromagnetic valve (35) is closed, a liquid cooling plate refrigerating loop is formed in the liquid cooling plate system (3), when the liquid cooling plate system (3) enters the liquid cooling plate radiating mode, the fifth electromagnetic valve (35) is opened, the second electronic expansion valve (17) and the fourth electromagnetic valve (34) are both closed, a liquid cooling plate radiating loop is formed in the liquid cooling plate system (3), when the liquid cooling plate system (3) enters the liquid cooling plate self-circulation mode, the fourth electromagnetic valve (34) is opened, the second electronic expansion valve (17) and the fifth electromagnetic valve (35) are both closed, and a liquid cooling plate self-circulation loop is formed in the liquid cooling plate system (3).
  7. 7. A temperature control method for use in the energy storage device temperature control system of any one of claims 1-6, comprising the steps of: S1, acquiring a first cooling requirement theta Cooling 1 and a heating requirement theta Heating of the immersion system in real time, and acquiring a second cooling requirement theta Cooling 2 of the liquid cooling plate system in real time; s2, controlling the immersion system to enter different modes by a controller according to the sizes of theta Cooling 1 and theta Heating acquired in the step S1: When the theta Cooling 1 is more than or equal to 100%, the immersion system enters an immersion refrigeration mode, and an immersion refrigeration loop is formed in the immersion system; When 0 is θ Cooling 1 When 100%, the immersion system enters an immersion heat dissipation mode, and an immersion heat dissipation loop is formed in the immersion system; when theta Cooling 1 is less than or equal to 0, the immersion system enters an immersion self-circulation mode, and an immersion self-circulation loop is formed in the immersion system; When theta Heating is more than or equal to 0, the immersion system enters an immersion heating mode, and an immersion heating loop is formed in the immersion system; Meanwhile, according to the size of θ Cooling 2 acquired in step S1, the controller controls the liquid cooling plate system to enter different modes: when the theta Cooling 2 is more than or equal to 100%, the liquid cooling plate system enters a liquid cooling plate refrigerating mode, and a liquid cooling plate refrigerating loop is formed in the liquid cooling plate system; When 0 is θ Cooling 2 When the temperature is 100%, the liquid cooling plate system enters a liquid cooling plate heat dissipation mode, and a liquid cooling plate heat dissipation loop is formed in the liquid cooling plate system; When theta Cooling 2 is less than or equal to 0, the liquid cooling plate system enters a liquid cooling plate self-circulation mode, and a liquid cooling plate self-circulation loop is formed in the liquid cooling plate system; the first cooling demand θ Cooling 1 is calculated by the formula (1): (1) the heating demand θ Heating is calculated from formula (2): (2) The second cooling demand θ Cooling 2 is calculated by equation (3): (3) In the formula, T Battery module is the temperature of the battery module, T Liquid cooling plate is the temperature of the liquid cooling plate assembly, T Setting up 1 is the first set temperature, T Setting up 2 is the second set temperature, T Setting up 3 is the third set temperature, T Cooling sensitivity is the cooling sensitivity, and T Heating sensitivity is the heating sensitivity.

Description

Energy storage equipment temperature control system and temperature control method thereof Technical Field The invention relates to the field of temperature control, in particular to a temperature control system of energy storage equipment and a temperature control method thereof. Background The energy storage device can store electric energy and is widely applied to various scenes such as a power generation side, a power transmission and distribution side, a power utilization side and the like. With the continuous development of energy storage technology in recent years, the energy storage device stores energy and outputs power increasingly, the heat generated in the working process is high, and in order to maintain the energy storage device to operate in a safe range with high efficiency, the temperature control of the energy storage device by searching a heat dissipation mode with strong heat dissipation capability is not slow. In temperature control, an air cooling heat dissipation mode, a liquid cooling plate heat dissipation mode and an immersion heat dissipation mode are widely and well used, wherein the air cooling heat dissipation mode has the problems of low heat dissipation efficiency, poor temperature control uniformity, low energy efficiency ratio and the like, the liquid cooling plate heat dissipation mode has the problems of large contact thermal resistance, small heat exchange area and incapability of meeting the environment with large heat flux density, and the immersion heat dissipation mode has the problems of uniform heat dissipation, high speed, but large consumption of cooling liquid and high cost. At present, most energy storage devices are controlled by adopting a single heat dissipation mode, for example, in the Chinese patent No. CN218887311U, only an air cooling heat dissipation mode is adopted for temperature control, and in the Chinese patent No. CN212783590U, only an immersion cooling mode is adopted for temperature control. Because the heat flux density of the battery module in the energy storage equipment is larger, and the heat flux density of other energy storage components except the battery module is smaller, a single heat dissipation mode is adopted, so that unreasonable cold load distribution is easily caused, and the heat dissipation effect is poor and the energy consumption is increased. Therefore, it is necessary to provide a temperature control system with a reasonable design to solve the above-mentioned problems. Disclosure of Invention In order to solve the technical problems in the prior art, the invention provides the temperature control system of the energy storage equipment, which adopts different heat dissipation modes aiming at different components in the energy storage equipment, so that the cooling load is reasonably distributed, the heat dissipation effect is good, and the energy consumption is low. In order to achieve the above purpose, the invention is realized by the following technical scheme: The energy storage equipment temperature control system comprises a battery module and other energy storage components except the battery module, the temperature control system comprises a controller, a refrigerating system, an immersion system and a liquid cooling plate system, the controller is respectively in control connection with the refrigerating system, the immersion system and the liquid cooling plate system, the refrigerating system is connected with the immersion system through a first plate heat exchanger and is connected with the liquid cooling plate system through a second plate heat exchanger, the first plate heat exchanger and the second plate heat exchanger are arranged in parallel in the refrigerating system, an immersion box is arranged in the immersion system, the liquid cooling plate system is provided with the liquid cooling plate component, the battery module is immersed in the immersion box, at least part of the other energy storage components are in contact with the liquid cooling plate component, the immersion system has four modes, namely an immersion refrigerating mode, a heat dissipation mode, an immersion self-circulation mode and a heating mode, and the liquid cooling plate system has three modes, namely a liquid cooling plate refrigerating mode and a liquid cooling plate heat dissipation mode. Further, the refrigerating system comprises a gas-liquid separator, a compressor, a condenser, a liquid storage tank and a first filter which are sequentially connected, wherein a cold side inlet of the first plate heat exchanger and a cold side inlet of the second plate heat exchanger are connected with the first filter, a cold side outlet of the first plate heat exchanger and a cold side outlet of the second plate heat exchanger are connected with the gas-liquid separator, a first electronic expansion valve is arranged between the first filter and the cold side inlet of the first plate heat exchanger, and a second electronic expansion valv